2 !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3 This file is built by metaconfig.
5 This file contains a description of all the shell variables whose value is
6 determined by the Configure script. Variables intended for use in C
7 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
8 generates pod documentation for Config.pm from this file--please try to keep
9 the formatting regular.]
12 This variable defines the extension used for ordinary library files.
13 For unix, it is '.a'. The '.' is included. Other possible
14 values include '.lib'.
17 This variable defines the extension used for executable files.
18 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
19 On operating systems which do not require a specific extension
20 for executable files, this variable is empty.
23 This variable defines the extension used for object files.
24 For unix, it is '.o'. The '.' is included. Other possible
25 values include '.obj'.
28 This variable is set to 'true' if AFS (Andrew File System) is used
29 on the system, 'false' otherwise. It is possible to override this
30 with a hint value or command line option, but you'd better know
34 This variable is by default set to '/afs'. In the unlikely case
35 this is not the correct root, it is possible to override this with
36 a hint value or command line option. This will be used in subsequent
37 tests for AFSness in the configure and test process.
39 alignbytes (alignbytes.U):
40 This variable holds the number of bytes required to align a
41 double-- or a long double when applicable. Usual values are
42 2, 4 and 8. The default is eight, for safety.
44 aphostname (d_gethname.U):
45 This variable contains the command which can be used to compute the
46 host name. The command is fully qualified by its absolute path, to make
47 it safe when used by a process with super-user privileges.
49 api_revision (patchlevel.U):
50 The three variables, api_revision, api_version, and
51 api_subversion, specify the version of the oldest perl binary
52 compatible with the present perl. In a full version string
53 such as '5.6.1', api_revision is the '5'.
54 Prior to 5.5.640, the format was a floating point number,
57 perl.c:incpush() and lib/lib.pm will automatically search in
58 $sitelib/.. for older directories back to the limit specified
59 by these api_ variables. This is only useful if you have a
60 perl library directory tree structured like the default one.
61 See INSTALL for how this works. The versioned site_perl
62 directory was introduced in 5.005, so that is the lowest
63 possible value. The version list appropriate for the current
64 system is determined in inc_version_list.U.
66 XXX To do: Since compatibility can depend on compile time
67 options (such as bincompat, longlong, etc.) it should
68 (perhaps) be set by Configure, but currently it isn't.
69 Currently, we read a hard-wired value from patchlevel.h.
70 Perhaps what we ought to do is take the hard-wired value from
71 patchlevel.h but then modify it if the current Configure
72 options warrant. patchlevel.h then would use an #ifdef guard.
74 api_subversion (patchlevel.U):
75 The three variables, api_revision, api_version, and
76 api_subversion, specify the version of the oldest perl binary
77 compatible with the present perl. In a full version string
78 such as '5.6.1', api_subversion is the '1'. See api_revision for
81 api_version (patchlevel.U):
82 The three variables, api_revision, api_version, and
83 api_subversion, specify the version of the oldest perl binary
84 compatible with the present perl. In a full version string
85 such as '5.6.1', api_version is the '6'. See api_revision for
86 full details. As a special case, 5.5.0 is rendered in the
87 old-style as 5.005. (In the 5.005_0x maintenance series,
88 this was the only versioned directory in $sitelib.)
90 api_versionstring (patchlevel.U):
91 This variable combines api_revision, api_version, and
92 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
93 for use as a directory name. This is filesystem dependent.
96 This variable is used internally by Configure to determine the
97 full pathname (if any) of the ar program. After Configure runs,
98 the value is reset to a plain "ar" and is not useful.
101 This variable holds the name of the directory in which the user wants
102 to put architecture-dependent public library files for $package.
103 It is most often a local directory such as /usr/local/lib.
104 Programs using this variable must be prepared to deal
105 with filename expansion.
107 archlibexp (archlib.U):
108 This variable is the same as the archlib variable, but is
109 filename expanded at configuration time, for convenient use.
111 archname (archname.U):
112 This variable is a short name to characterize the current
113 architecture. It is used mainly to construct the default archlib.
115 archname64 (use64bits.U):
116 This variable is used for the 64-bitness part of $archname.
119 This variable defines any additional objects that must be linked
120 in with the program on this architecture. On unix, it is usually
121 empty. It is typically used to include emulations of unix calls
122 or other facilities. For perl on OS/2, for example, this would
125 asctime_r_proto (d_asctime_r.U):
126 This variable encodes the prototype of asctime_r.
127 It is zero if d_asctime_r is undef, and one of the
128 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
132 This variable is used internally by Configure to determine the
133 full pathname (if any) of the awk program. After Configure runs,
134 the value is reset to a plain "awk" and is not useful.
137 The base revision level of this package, from the .package file.
140 This variable is defined but not used by Configure.
141 The value is the empty string and is not useful.
144 This variable holds the name of the directory in which the user wants
145 to put publicly executable images for the package in question. It
146 is most often a local directory such as /usr/local/bin. Programs using
147 this variable must be prepared to deal with ~name substitution.
150 This variable saves the result from configure if generated binaries
151 are in ELF format. Only set to defined when the test has actually
152 been performed, and the result was positive.
155 This is the same as the bin variable, but is filename expanded at
156 configuration time, for use in your makefiles.
159 This variable is used internally by Configure to determine the
160 full pathname (if any) of the bison program. After Configure runs,
161 the value is reset to a plain "bison" and is not useful.
164 This variable is used internally by Configure to determine the
165 full pathname (if any) of the byacc program. After Configure runs,
166 the value is reset to a plain "byacc" and is not useful.
168 byteorder (byteorder.U):
169 This variable holds the byte order in a UV. In the following,
170 larger digits indicate more significance. The variable byteorder
171 is either 4321 on a big-endian machine, or 1234 on a little-endian,
172 or 87654321 on a Cray ... or 3412 with weird order !
175 This variable contains the \c string if that is what causes the echo
176 command to suppress newline. Otherwise it is null. Correct usage is
177 $echo $n "prompt for a question: $c".
179 castflags (d_castneg.U):
180 This variable contains a flag that precise difficulties the
181 compiler has casting odd floating values to unsigned long:
183 1 = couldn't cast < 0
184 2 = couldn't cast >= 0x80000000
185 4 = couldn't cast in argument expression list
188 This variable is used internally by Configure to determine the
189 full pathname (if any) of the cat program. After Configure runs,
190 the value is reset to a plain "cat" and is not useful.
193 This variable holds the name of a command to execute a C compiler which
194 can resolve multiple global references that happen to have the same
195 name. Usual values are 'cc' and 'gcc'.
196 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
198 cccdlflags (dlsrc.U):
199 This variable contains any special flags that might need to be
200 passed with 'cc -c' to compile modules to be used to create a shared
201 library that will be used for dynamic loading. For hpux, this
202 should be +z. It is up to the makefile to use it.
205 This variable contains any special flags that might need to be
206 passed to cc to link with a shared library for dynamic loading.
207 It is up to the makefile to use it. For sunos 4.1, it should
211 This variable contains any additional C compiler flags desired by
212 the user. It is up to the Makefile to use this.
214 ccflags_uselargefiles (uselfs.U):
215 This variable contains the compiler flags needed by large file builds
216 and added to ccflags by hints files.
219 This can set either by hints files or by Configure. If using
220 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
221 Some platforms, however, make good use of this by storing the
222 flavor of the C compiler being used here. For example if using
223 the Sun WorkShop suite, ccname will be 'workshop'.
225 ccsymbols (Cppsym.U):
226 The variable contains the symbols defined by the C compiler alone.
227 The symbols defined by cpp or by cc when it calls cpp are not in
228 this list, see cppsymbols and cppccsymbols.
229 The list is a space-separated list of symbol=value tokens.
231 ccversion (Checkcc.U):
232 This can set either by hints files or by Configure. If using
233 a (non-gcc) vendor cc, this variable may contain a version for
237 Login name of the person who ran the Configure script and answered the
238 questions. This is used to tag both config.sh and config_h.SH.
240 cf_email (cf_email.U):
241 Electronic mail address of the person who ran Configure. This can be
242 used by units that require the user's e-mail, like MailList.U.
245 Holds the output of the "date" command when the configuration file was
246 produced. This is used to tag both config.sh and config_h.SH.
248 charbits (charsize.U):
249 This variable contains the value of the CHARBITS symbol, which
250 indicates to the C program how many bits there are in a character.
252 charsize (charsize.U):
253 This variable contains the value of the CHARSIZE symbol, which
254 indicates to the C program how many bytes there are in a character.
257 This variable is defined but not used by Configure.
258 The value is the empty string and is not useful.
261 This variable is used internally by Configure to determine the
262 full pathname (if any) of the chmod program. After Configure runs,
263 the value is reset to a plain "chmod" and is not useful.
266 This variable is defined but not used by Configure.
267 The value is the empty string and is not useful.
269 clocktype (d_times.U):
270 This variable holds the type returned by times(). It can be long,
271 or clock_t on BSD sites (in which case <sys/types.h> should be
275 This variable is used internally by Configure to determine the
276 full pathname (if any) of the comm program. After Configure runs,
277 the value is reset to a plain "comm" and is not useful.
280 This variable is defined but not used by Configure.
281 The value is the empty string and is not useful.
283 config_arg0 (Options.U):
284 This variable contains the string used to invoke the Configure
285 command, as reported by the shell in the $0 variable.
287 config_argc (Options.U):
288 This variable contains the number of command-line arguments
289 passed to Configure, as reported by the shell in the $# variable.
290 The individual arguments are stored as variables config_arg1,
293 config_args (Options.U):
294 This variable contains a single string giving the command-line
295 arguments passed to Configure. Spaces within arguments,
296 quotes, and escaped characters are not correctly preserved.
297 To reconstruct the command line, you must assemble the individual
298 command line pieces, given in config_arg[0-9]*.
300 contains (contains.U):
301 This variable holds the command to do a grep with a proper return
302 status. On most sane systems it is simply "grep". On insane systems
303 it is a grep followed by a cat followed by a test. This variable
304 is primarily for the use of other Configure units.
307 This variable is used internally by Configure to determine the
308 full pathname (if any) of the cp program. After Configure runs,
309 the value is reset to a plain "cp" and is not useful.
312 This variable is defined but not used by Configure.
313 The value is the empty string and is not useful.
316 This variable is used internally by Configure to determine the
317 full pathname (if any) of the cpp program. After Configure runs,
318 the value is reset to a plain "cpp" and is not useful.
320 cpp_stuff (cpp_stuff.U):
321 This variable contains an identification of the concatenation mechanism
322 used by the C preprocessor.
324 cppccsymbols (Cppsym.U):
325 The variable contains the symbols defined by the C compiler
326 when it calls cpp. The symbols defined by the cc alone or cpp
327 alone are not in this list, see ccsymbols and cppsymbols.
328 The list is a space-separated list of symbol=value tokens.
330 cppflags (ccflags.U):
331 This variable holds the flags that will be passed to the C pre-
332 processor. It is up to the Makefile to use it.
334 cpplast (cppstdin.U):
335 This variable has the same functionality as cppminus, only it applies
336 to cpprun and not cppstdin.
338 cppminus (cppstdin.U):
339 This variable contains the second part of the string which will invoke
340 the C preprocessor on the standard input and produce to standard
341 output. This variable will have the value "-" if cppstdin needs
342 a minus to specify standard input, otherwise the value is "".
345 This variable contains the command which will invoke a C preprocessor
346 on standard input and put the output to stdout. It is guaranteed not
347 to be a wrapper and may be a null string if no preprocessor can be
348 made directly available. This preprocessor might be different from the
349 one used by the C compiler. Don't forget to append cpplast after the
350 preprocessor options.
352 cppstdin (cppstdin.U):
353 This variable contains the command which will invoke the C
354 preprocessor on standard input and put the output to stdout.
355 It is primarily used by other Configure units that ask about
356 preprocessor symbols.
358 cppsymbols (Cppsym.U):
359 The variable contains the symbols defined by the C preprocessor
360 alone. The symbols defined by cc or by cc when it calls cpp are
361 not in this list, see ccsymbols and cppccsymbols.
362 The list is a space-separated list of symbol=value tokens.
364 crypt_r_proto (d_crypt_r.U):
365 This variable encodes the prototype of crypt_r.
366 It is zero if d_crypt_r is undef, and one of the
367 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
370 cryptlib (d_crypt.U):
371 This variable holds -lcrypt or the path to a libcrypt.a archive if
372 the crypt() function is not defined in the standard C library. It is
373 up to the Makefile to use this.
376 This variable is used internally by Configure to determine the
377 full pathname (if any) of the csh program. After Configure runs,
378 the value is reset to a plain "csh" and is not useful.
380 ctermid_r_proto (d_ctermid_r.U):
381 This variable encodes the prototype of ctermid_r.
382 It is zero if d_ctermid_r is undef, and one of the
383 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
386 ctime_r_proto (d_ctime_r.U):
387 This variable encodes the prototype of ctime_r.
388 It is zero if d_ctime_r is undef, and one of the
389 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
392 d__fwalk (d__fwalk.U):
393 This variable conditionally defines HAS__FWALK if _fwalk() is
394 available to apply a function to all the file handles.
396 d_accept4 (d_accept4.U):
397 This variable conditionally defines HAS_ACCEPT4 if accept4() is
398 available to accept socket connections.
400 d_access (d_access.U):
401 This variable conditionally defines HAS_ACCESS if the access() system
402 call is available to check for access permissions using real IDs.
404 d_accessx (d_accessx.U):
405 This variable conditionally defines the HAS_ACCESSX symbol, which
406 indicates to the C program that the accessx() routine is available.
409 This variable conditionally defines the HAS_ACOSH symbol, which
410 indicates to the C program that the acosh() routine is available.
413 This variable conditionally defines the HAS_AINTL symbol, which
414 indicates to the C program that the aintl() routine is available.
415 If copysignl is also present we can emulate modfl.
418 This variable conditionally defines the HAS_ALARM symbol, which
419 indicates to the C program that the alarm() routine is available.
421 d_archlib (archlib.U):
422 This variable conditionally defines ARCHLIB to hold the pathname
423 of architecture-dependent library files for $package. If
424 $archlib is the same as $privlib, then this is set to undef.
426 d_asctime64 (d_timefuncs64.U):
427 This variable conditionally defines the HAS_ASCTIME64 symbol, which
428 indicates to the C program that the asctime64 () routine is available.
430 d_asctime_r (d_asctime_r.U):
431 This variable conditionally defines the HAS_ASCTIME_R symbol,
432 which indicates to the C program that the asctime_r()
433 routine is available.
436 This variable conditionally defines the HAS_ASINH symbol, which
437 indicates to the C program that the asinh() routine is available.
440 This variable conditionally defines the HAS_ATANH symbol, which
441 indicates to the C program that the atanh() routine is available.
444 This variable conditionally defines the HAS_ATOLF symbol, which
445 indicates to the C program that the atolf() routine is available.
448 This variable conditionally defines the HAS_ATOLL symbol, which
449 indicates to the C program that the atoll() routine is available.
451 d_attribute_always_inline (d_attribut.U):
452 This variable conditionally defines HASATTRIBUTE_ALWAYS_INLINE,
453 which indicates that the C compiler can know that certain
454 functions should always be inlined.
456 d_attribute_deprecated (d_attribut.U):
457 This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
458 indicates that GCC can handle the attribute for marking deprecated
461 d_attribute_format (d_attribut.U):
462 This variable conditionally defines HASATTRIBUTE_FORMAT, which
463 indicates the C compiler can check for printf-like formats.
465 d_attribute_malloc (d_attribut.U):
466 This variable conditionally defines HASATTRIBUTE_MALLOC, which
467 indicates the C compiler can understand functions as having
468 malloc-like semantics.
470 d_attribute_nonnull (d_attribut.U):
471 This variable conditionally defines HASATTRIBUTE_NONNULL, which
472 indicates that the C compiler can know that certain arguments
473 must not be NULL, and will check accordingly at compile time.
475 d_attribute_noreturn (d_attribut.U):
476 This variable conditionally defines HASATTRIBUTE_NORETURN, which
477 indicates that the C compiler can know that certain functions
478 are guaranteed never to return.
480 d_attribute_pure (d_attribut.U):
481 This variable conditionally defines HASATTRIBUTE_PURE, which
482 indicates that the C compiler can know that certain functions
483 are "pure" functions, meaning that they have no side effects, and
484 only rely on function input and/or global data for their results.
486 d_attribute_unused (d_attribut.U):
487 This variable conditionally defines HASATTRIBUTE_UNUSED, which
488 indicates that the C compiler can know that certain variables
489 and arguments may not always be used, and to not throw warnings
490 if they don't get used.
492 d_attribute_warn_unused_result (d_attribut.U):
493 This variable conditionally defines
494 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
495 compiler can know that certain functions have a return values
496 that must not be ignored, such as malloc() or open().
498 d_backtrace (d_backtrace.U):
499 This variable conditionally defines the HAS_BACKTRACE symbol, which
500 indicates to the C program that the backtrace() routine is available
501 to get a stack trace.
504 This symbol conditionally defines the symbol BSD when running on a
507 d_bsdgetpgrp (d_getpgrp.U):
508 This variable conditionally defines USE_BSD_GETPGRP if
509 getpgrp needs one arguments whereas USG one needs none.
511 d_bsdsetpgrp (d_setpgrp.U):
512 This variable conditionally defines USE_BSD_SETPGRP if
513 setpgrp needs two arguments whereas USG one needs none.
514 See also d_setpgid for a POSIX interface.
516 d_builtin_add_overflow (d_builtin_overflow.U):
517 This variable conditionally defines HAS_BUILTIN_ADD_OVERFLOW, which
518 indicates that the compiler supports __builtin_add_overflow(x,y,&z)
519 for safely adding x and y into z while checking for overflow.
521 d_builtin_choose_expr (d_builtin.U):
522 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
523 indicates that the compiler supports __builtin_choose_expr(x,y,z).
524 This built-in function is analogous to the "x?y:z" operator in C,
525 except that the expression returned has its type unaltered by
526 promotion rules. Also, the built-in function does not evaluate
527 the expression that was not chosen.
529 d_builtin_expect (d_builtin.U):
530 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
531 that the compiler supports __builtin_expect(exp,c). You may use
532 __builtin_expect to provide the compiler with branch prediction
535 d_builtin_mul_overflow (d_builtin_overflow.U):
536 This variable conditionally defines HAS_BUILTIN_MUL_OVERFLOW, which
537 indicates that the compiler supports __builtin_mul_overflow(x,y,&z)
538 for safely multiplying x and y into z while checking for overflow.
540 d_builtin_sub_overflow (d_builtin_overflow.U):
541 This variable conditionally defines HAS_BUILTIN_SUB_OVERFLOW, which
542 indicates that the compiler supports __builtin_sub_overflow(x,y,&z)
543 for safely subtracting y from x into z while checking for overflow.
545 d_c99_variadic_macros (d_c99_variadic.U):
546 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
547 symbol, which indicates to the C program that C99 variadic macros
550 d_casti32 (d_casti32.U):
551 This variable conditionally defines CASTI32, which indicates
552 whether the C compiler can cast large floats to 32-bit ints.
554 d_castneg (d_castneg.U):
555 This variable conditionally defines CASTNEG, which indicates
556 whether the C compiler can cast negative float to unsigned.
559 This variable conditionally defines the HAS_CBRT symbol, which
560 indicates to the C program that the cbrt() (cube root) function
564 This variable conditionally defines the HAS_CHOWN symbol, which
565 indicates to the C program that the chown() routine is available.
567 d_chroot (d_chroot.U):
568 This variable conditionally defines the HAS_CHROOT symbol, which
569 indicates to the C program that the chroot() routine is available.
571 d_chsize (d_chsize.U):
572 This variable conditionally defines the CHSIZE symbol, which
573 indicates to the C program that the chsize() routine is available
574 to truncate files. You might need a -lx to get this routine.
577 This variable conditionally defines the HAS_CLASS symbol, which
578 indicates to the C program that the class() routine is available.
580 d_clearenv (d_clearenv.U):
581 This variable conditionally defines the HAS_CLEARENV symbol, which
582 indicates to the C program that the clearenv () routine is available.
584 d_closedir (d_closedir.U):
585 This variable conditionally defines HAS_CLOSEDIR if closedir() is
588 d_cmsghdr_s (d_cmsghdr_s.U):
589 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
590 which indicates that the struct cmsghdr is supported.
592 d_copysign (d_copysign.U):
593 This variable conditionally defines the HAS_COPYSIGN symbol, which
594 indicates to the C program that the copysign() routine is available.
596 d_copysignl (d_copysignl.U):
597 This variable conditionally defines the HAS_COPYSIGNL symbol, which
598 indicates to the C program that the copysignl() routine is available.
599 If aintl is also present we can emulate modfl.
601 d_cplusplus (d_cplusplus.U):
602 This variable conditionally defines the USE_CPLUSPLUS symbol, which
603 indicates that a C++ compiler was used to compiled Perl and will be
604 used to compile extensions.
607 This variable conditionally defines the CRYPT symbol, which
608 indicates to the C program that the crypt() routine is available
609 to encrypt passwords and the like.
611 d_crypt_r (d_crypt_r.U):
612 This variable conditionally defines the HAS_CRYPT_R symbol,
613 which indicates to the C program that the crypt_r()
614 routine is available.
617 This variable conditionally defines the CSH symbol, which
618 indicates to the C program that the C-shell exists.
620 d_ctermid (d_ctermid.U):
621 This variable conditionally defines CTERMID if ctermid() is
622 available to generate filename for terminal.
624 d_ctermid_r (d_ctermid_r.U):
625 This variable conditionally defines the HAS_CTERMID_R symbol,
626 which indicates to the C program that the ctermid_r()
627 routine is available.
629 d_ctime64 (d_timefuncs64.U):
630 This variable conditionally defines the HAS_CTIME64 symbol, which
631 indicates to the C program that the ctime64 () routine is available.
633 d_ctime_r (d_ctime_r.U):
634 This variable conditionally defines the HAS_CTIME_R symbol,
635 which indicates to the C program that the ctime_r()
636 routine is available.
638 d_cuserid (d_cuserid.U):
639 This variable conditionally defines the HAS_CUSERID symbol, which
640 indicates to the C program that the cuserid() routine is available
641 to get character login names.
643 d_dbminitproto (d_dbminitproto.U):
644 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
645 which indicates to the C program that the system provides
646 a prototype for the dbminit() function. Otherwise, it is
647 up to the program to supply one.
649 d_difftime (d_difftime.U):
650 This variable conditionally defines the HAS_DIFFTIME symbol, which
651 indicates to the C program that the difftime() routine is available.
653 d_difftime64 (d_timefuncs64.U):
654 This variable conditionally defines the HAS_DIFFTIME64 symbol, which
655 indicates to the C program that the difftime64 () routine is available.
657 d_dir_dd_fd (d_dir_dd_fd.U):
658 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
659 indicates that the DIR directory stream type contains a member
660 variable called dd_fd.
663 This variable conditionally defines the HAS_DIRFD constant,
664 which indicates to the C program that dirfd() is available
665 to return the file descriptor of a directory stream.
667 d_dirnamlen (i_dirent.U):
668 This variable conditionally defines DIRNAMLEN, which indicates
669 to the C program that the length of directory entry names is
670 provided by a d_namelen field.
672 d_dladdr (d_dladdr.U):
673 This variable conditionally defines the HAS_DLADDR symbol, which
674 indicates to the C program that the dladdr() routine is available
675 to get a stack trace.
677 d_dlerror (d_dlerror.U):
678 This variable conditionally defines the HAS_DLERROR symbol, which
679 indicates to the C program that the dlerror() routine is available.
681 d_dlopen (d_dlopen.U):
682 This variable conditionally defines the HAS_DLOPEN symbol, which
683 indicates to the C program that the dlopen() routine is available.
685 d_dlsymun (d_dlsymun.U):
686 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
687 indicates that we need to prepend an underscore to the symbol
688 name before calling dlsym().
690 d_dosuid (d_dosuid.U):
691 This variable conditionally defines the symbol DOSUID, which
692 tells the C program that it should insert setuid emulation code
693 on hosts which have setuid #! scripts disabled.
695 d_double_has_inf (longdblfio.U):
696 This variable conditionally defines the symbol DOUBLE_HAS_INF
697 which indicates that the double type has an infinity.
699 d_double_has_nan (longdblfio.U):
700 This variable conditionally defines the symbol DOUBLE_HAS_NAN
701 which indicates that the double type has a not-a-number.
703 d_double_has_negative_zero (longdblfio.U):
704 This variable conditionally defines the symbol DOUBLE_HAS_NEGATIVE_ZERO
705 which indicates that the double type has a negative zero.
707 d_double_has_subnormals (longdblfio.U):
708 This variable conditionally defines the symbol DOUBLE_HAS_SUBNORMALS
709 which indicates that the double type has subnormals (denormals).
711 d_double_style_cray (longdblfio.U):
712 This variable conditionally defines the symbol DOUBLE_STYLE_CRAY
713 which indicates that the double is the 64-bit CRAY mainframe format.
715 d_double_style_ibm (longdblfio.U):
716 This variable conditionally defines the symbol DOUBLE_STYLE_IBM,
717 which indicates that the double is the 64-bit IBM mainframe format.
719 d_double_style_ieee (longdblfio.U):
720 This variable conditionally defines the symbol DOUBLE_STYLE_IEEE,
721 which indicates that the double is the 64-bit IEEE 754.
723 d_double_style_vax (longdblfio.U):
724 This variable conditionally defines the symbol DOUBLE_STYLE_VAX,
725 which indicates that the double is the 64-bit VAX format D or G.
727 d_drand48_r (d_drand48_r.U):
728 This variable conditionally defines the HAS_DRAND48_R symbol,
729 which indicates to the C program that the drand48_r()
730 routine is available.
732 d_drand48proto (d_drand48proto.U):
733 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
734 which indicates to the C program that the system provides
735 a prototype for the drand48() function. Otherwise, it is
736 up to the program to supply one.
739 This variable conditionally defines HAS_DUP2 if dup2() is
740 available to duplicate file descriptors.
743 This variable conditionally defines HAS_DUP3 if dup3() is
744 available to duplicate file descriptors.
746 d_duplocale (d_newlocale.U):
747 This variable conditionally defines the HAS_DUPLOCALE symbol, which
748 indicates to the C program that the duplocale() routine is available
749 to duplicate a locale object.
751 d_eaccess (d_eaccess.U):
752 This variable conditionally defines the HAS_EACCESS symbol, which
753 indicates to the C program that the eaccess() routine is available.
755 d_endgrent (d_endgrent.U):
756 This variable conditionally defines the HAS_ENDGRENT symbol, which
757 indicates to the C program that the endgrent() routine is available
758 for sequential access of the group database.
760 d_endgrent_r (d_endgrent_r.U):
761 This variable conditionally defines the HAS_ENDGRENT_R symbol,
762 which indicates to the C program that the endgrent_r()
763 routine is available.
765 d_endhent (d_endhent.U):
766 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
767 available to close whatever was being used for host queries.
769 d_endhostent_r (d_endhostent_r.U):
770 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
771 which indicates to the C program that the endhostent_r()
772 routine is available.
774 d_endnent (d_endnent.U):
775 This variable conditionally defines HAS_ENDNETENT if endnetent() is
776 available to close whatever was being used for network queries.
778 d_endnetent_r (d_endnetent_r.U):
779 This variable conditionally defines the HAS_ENDNETENT_R symbol,
780 which indicates to the C program that the endnetent_r()
781 routine is available.
783 d_endpent (d_endpent.U):
784 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
785 available to close whatever was being used for protocol queries.
787 d_endprotoent_r (d_endprotoent_r.U):
788 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
789 which indicates to the C program that the endprotoent_r()
790 routine is available.
792 d_endpwent (d_endpwent.U):
793 This variable conditionally defines the HAS_ENDPWENT symbol, which
794 indicates to the C program that the endpwent() routine is available
795 for sequential access of the passwd database.
797 d_endpwent_r (d_endpwent_r.U):
798 This variable conditionally defines the HAS_ENDPWENT_R symbol,
799 which indicates to the C program that the endpwent_r()
800 routine is available.
802 d_endsent (d_endsent.U):
803 This variable conditionally defines HAS_ENDSERVENT if endservent() is
804 available to close whatever was being used for service queries.
806 d_endservent_r (d_endservent_r.U):
807 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
808 which indicates to the C program that the endservent_r()
809 routine is available.
811 d_eofnblk (nblock_io.U):
812 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
813 when reading from a non-blocking I/O source.
816 This variable conditionally defines the HAS_ERF symbol, which
817 indicates to the C program that the erf() routine is available.
820 This variable conditionally defines the HAS_ERFC symbol, which
821 indicates to the C program that the erfc() routine is available.
824 This variable conditionally defines the symbols EUNICE and VAX, which
825 alerts the C program that it must deal with idiosyncrasies of VMS.
828 This variable conditionally defines the HAS_EXP2 symbol, which
829 indicates to the C program that the exp2() routine is available.
832 This variable conditionally defines the HAS_EXPM1 symbol, which
833 indicates to the C program that the expm1() routine is available.
835 d_faststdio (d_faststdio.U):
836 This variable conditionally defines the HAS_FAST_STDIO symbol,
837 which indicates to the C program that the "fast stdio" is available
838 to manipulate the stdio buffers directly.
840 d_fchdir (d_fchdir.U):
841 This variable conditionally defines the HAS_FCHDIR symbol, which
842 indicates to the C program that the fchdir() routine is available.
844 d_fchmod (d_fchmod.U):
845 This variable conditionally defines the HAS_FCHMOD symbol, which
846 indicates to the C program that the fchmod() routine is available
847 to change mode of opened files.
849 d_fchmodat (d_fsat.U):
850 This variable conditionally defines the HAS_FCHMODAT symbol, which
851 indicates the POSIX fchmodat() function is available.
853 d_fchown (d_fchown.U):
854 This variable conditionally defines the HAS_FCHOWN symbol, which
855 indicates to the C program that the fchown() routine is available
856 to change ownership of opened files.
859 This variable conditionally defines the HAS_FCNTL symbol, and indicates
860 whether the fcntl() function exists
862 d_fcntl_can_lock (d_fcntl_can_lock.U):
863 This variable conditionally defines the FCNTL_CAN_LOCK symbol
864 and indicates whether file locking with fcntl() works.
866 d_fd_macros (d_fd_set.U):
867 This variable contains the eventual value of the HAS_FD_MACROS symbol,
868 which indicates if your C compiler knows about the macros which
869 manipulate an fd_set.
871 d_fd_set (d_fd_set.U):
872 This variable contains the eventual value of the HAS_FD_SET symbol,
873 which indicates if your C compiler knows about the fd_set typedef.
875 d_fdclose (d_fdclose.U):
876 This variable conditionally defines the HAS_FDCLOSE symbol, which
877 indicates to the C program that the fdclose() routine is available.
880 This variable conditionally defines the HAS_FDIM symbol, which
881 indicates to the C program that the fdim() routine is available.
883 d_fds_bits (d_fd_set.U):
884 This variable contains the eventual value of the HAS_FDS_BITS symbol,
885 which indicates if your fd_set typedef contains the fds_bits member.
886 If you have an fd_set typedef, but the dweebs who installed it did
887 a half-fast job and neglected to provide the macros to manipulate
888 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
890 d_fegetround (d_fegetround.U):
891 This variable conditionally defines HAS_FEGETROUND if fegetround() is
892 available to get the floating point rounding mode.
894 d_fgetpos (d_fgetpos.U):
895 This variable conditionally defines HAS_FGETPOS if fgetpos() is
896 available to get the file position indicator.
898 d_finite (d_finite.U):
899 This variable conditionally defines the HAS_FINITE symbol, which
900 indicates to the C program that the finite() routine is available.
902 d_finitel (d_finitel.U):
903 This variable conditionally defines the HAS_FINITEL symbol, which
904 indicates to the C program that the finitel() routine is available.
906 d_flexfnam (d_flexfnam.U):
907 This variable conditionally defines the FLEXFILENAMES symbol, which
908 indicates that the system supports filenames longer than 14 characters.
911 This variable conditionally defines HAS_FLOCK if flock() is
912 available to do file locking.
914 d_flockproto (d_flockproto.U):
915 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
916 which indicates to the C program that the system provides
917 a prototype for the flock() function. Otherwise, it is
918 up to the program to supply one.
921 This variable conditionally defines the HAS_FMA symbol, which
922 indicates to the C program that the fma() routine is available.
925 This variable conditionally defines the HAS_FMAX symbol, which
926 indicates to the C program that the fmax() routine is available.
929 This variable conditionally defines the HAS_FMIN symbol, which
930 indicates to the C program that the fmin() routine is available.
933 This variable conditionally defines the HAS_FORK symbol, which
934 indicates to the C program that the fork() routine is available.
936 d_fp_class (d_fp_class.U):
937 This variable conditionally defines the HAS_FP_CLASS symbol, which
938 indicates to the C program that the fp_class() routine is available.
940 d_fp_classify (d_fpclassify.U):
941 This variable conditionally defines the HAS_FP_CLASSIFY symbol, which
942 indicates to the C program that the fp_classify() routine is available.
944 d_fp_classl (d_fp_classl.U):
945 This variable conditionally defines the HAS_FP_CLASSL symbol, which
946 indicates to the C program that the fp_classl() routine is available.
948 d_fpathconf (d_pathconf.U):
949 This variable conditionally defines the HAS_FPATHCONF symbol, which
950 indicates to the C program that the pathconf() routine is available
951 to determine file-system related limits and options associated
952 with a given open file descriptor.
954 d_fpclass (d_fpclass.U):
955 This variable conditionally defines the HAS_FPCLASS symbol, which
956 indicates to the C program that the fpclass() routine is available.
958 d_fpclassify (d_fpclassify.U):
959 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
960 indicates to the C program that the fpclassify() routine is available.
962 d_fpclassl (d_fpclassl.U):
963 This variable conditionally defines the HAS_FPCLASSL symbol, which
964 indicates to the C program that the fpclassl() routine is available.
966 d_fpgetround (d_fpgetround.U):
967 This variable conditionally defines HAS_FPGETROUND if fpgetround()
968 is available to get the floating point rounding mode.
970 d_fpos64_t (d_fpos64_t.U):
971 This symbol will be defined if the C compiler supports fpos64_t.
973 d_freelocale (d_newlocale.U):
974 This variable conditionally defines the HAS_FREELOCALE symbol, which
975 indicates to the C program that the freelocale() routine is available
976 to deallocates the resources associated with a locale object.
978 d_frexpl (d_frexpl.U):
979 This variable conditionally defines the HAS_FREXPL symbol, which
980 indicates to the C program that the frexpl() routine is available.
982 d_fs_data_s (d_fs_data_s.U):
983 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
984 which indicates that the struct fs_data is supported.
986 d_fseeko (d_fseeko.U):
987 This variable conditionally defines the HAS_FSEEKO symbol, which
988 indicates to the C program that the fseeko() routine is available.
990 d_fsetpos (d_fsetpos.U):
991 This variable conditionally defines HAS_FSETPOS if fsetpos() is
992 available to set the file position indicator.
994 d_fstatfs (d_fstatfs.U):
995 This variable conditionally defines the HAS_FSTATFS symbol, which
996 indicates to the C program that the fstatfs() routine is available.
998 d_fstatvfs (d_statvfs.U):
999 This variable conditionally defines the HAS_FSTATVFS symbol, which
1000 indicates to the C program that the fstatvfs() routine is available.
1002 d_fsync (d_fsync.U):
1003 This variable conditionally defines the HAS_FSYNC symbol, which
1004 indicates to the C program that the fsync() routine is available.
1006 d_ftello (d_ftello.U):
1007 This variable conditionally defines the HAS_FTELLO symbol, which
1008 indicates to the C program that the ftello() routine is available.
1010 d_ftime (d_ftime.U):
1011 This variable conditionally defines the HAS_FTIME symbol, which indicates
1012 that the ftime() routine exists. The ftime() routine is basically
1013 a sub-second accuracy clock.
1015 d_futimes (d_futimes.U):
1016 This variable conditionally defines the HAS_FUTIMES symbol, which
1017 indicates to the C program that the futimes() routine is available.
1019 d_gai_strerror (d_gai_strerror.U):
1020 This variable conditionally defines the HAS_GAI_STRERROR symbol
1021 if the gai_strerror() routine is available and can be used to
1022 translate error codes returned by getaddrinfo() into human
1025 d_Gconvert (d_gconvert.U):
1026 This variable holds what Gconvert is defined as to convert
1027 floating point numbers into strings. By default, Configure
1028 sets this macro to use the first of gconvert, gcvt, or sprintf
1029 that pass sprintf-%g-like behavior tests. If perl is using
1030 long doubles, the macro uses the first of the following
1031 functions that pass Configure's tests: qgcvt, sprintf (if
1032 Configure knows how to make sprintf format long doubles--see
1033 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
1034 The gconvert_preference and gconvert_ld_preference variables
1035 can be used to alter Configure's preferences, for doubles and
1036 long doubles, respectively. If present, they contain a
1037 space-separated list of one or more of the above function
1038 names in the order they should be tried.
1040 d_Gconvert may be set to override Configure with a platform-
1041 specific function. If this function expects a double, a
1042 different value may need to be set by the uselongdouble.cbu
1043 call-back unit so that long doubles can be formatted without
1046 d_gdbm_ndbm_h_uses_prototypes (i_ndbm.U):
1047 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1048 which indicates that the gdbm-ndbm.h include file uses real ANSI C
1049 prototypes instead of K&R style function declarations. K&R style
1050 declarations are unsupported in C++, so the include file requires
1051 special handling when using a C++ compiler and this variable is
1052 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1053 to get the same information for alternative ndbm.h include files.
1055 d_gdbmndbm_h_uses_prototypes (i_ndbm.U):
1056 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1057 which indicates that the gdbm/ndbm.h include file uses real ANSI C
1058 prototypes instead of K&R style function declarations. K&R style
1059 declarations are unsupported in C++, so the include file requires
1060 special handling when using a C++ compiler and this variable is
1061 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1062 to get the same information for alternative ndbm.h include files.
1064 d_getaddrinfo (d_getaddrinfo.U):
1065 This variable conditionally defines the HAS_GETADDRINFO symbol,
1066 which indicates to the C program that the getaddrinfo() function
1069 d_getcwd (d_getcwd.U):
1070 This variable conditionally defines the HAS_GETCWD symbol, which
1071 indicates to the C program that the getcwd() routine is available
1072 to get the current working directory.
1074 d_getespwnam (d_getespwnam.U):
1075 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
1076 available to retrieve enhanced (shadow) password entries by name.
1078 d_getfsstat (d_getfsstat.U):
1079 This variable conditionally defines the HAS_GETFSSTAT symbol, which
1080 indicates to the C program that the getfsstat() routine is available.
1082 d_getgrent (d_getgrent.U):
1083 This variable conditionally defines the HAS_GETGRENT symbol, which
1084 indicates to the C program that the getgrent() routine is available
1085 for sequential access of the group database.
1087 d_getgrent_r (d_getgrent_r.U):
1088 This variable conditionally defines the HAS_GETGRENT_R symbol,
1089 which indicates to the C program that the getgrent_r()
1090 routine is available.
1092 d_getgrgid_r (d_getgrgid_r.U):
1093 This variable conditionally defines the HAS_GETGRGID_R symbol,
1094 which indicates to the C program that the getgrgid_r()
1095 routine is available.
1097 d_getgrnam_r (d_getgrnam_r.U):
1098 This variable conditionally defines the HAS_GETGRNAM_R symbol,
1099 which indicates to the C program that the getgrnam_r()
1100 routine is available.
1102 d_getgrps (d_getgrps.U):
1103 This variable conditionally defines the HAS_GETGROUPS symbol, which
1104 indicates to the C program that the getgroups() routine is available
1105 to get the list of process groups.
1107 d_gethbyaddr (d_gethbyad.U):
1108 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
1109 indicates to the C program that the gethostbyaddr() routine is available
1110 to look up hosts by their IP addresses.
1112 d_gethbyname (d_gethbynm.U):
1113 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
1114 indicates to the C program that the gethostbyname() routine is available
1115 to look up host names in some data base or other.
1117 d_gethent (d_gethent.U):
1118 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
1119 available to look up host names in some data base or another.
1121 d_gethname (d_gethname.U):
1122 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
1123 indicates to the C program that the gethostname() routine may be
1124 used to derive the host name.
1126 d_gethostbyaddr_r (d_gethostbyaddr_r.U):
1127 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
1128 which indicates to the C program that the gethostbyaddr_r()
1129 routine is available.
1131 d_gethostbyname_r (d_gethostbyname_r.U):
1132 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
1133 which indicates to the C program that the gethostbyname_r()
1134 routine is available.
1136 d_gethostent_r (d_gethostent_r.U):
1137 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
1138 which indicates to the C program that the gethostent_r()
1139 routine is available.
1141 d_gethostprotos (d_gethostprotos.U):
1142 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
1143 which indicates to the C program that <netdb.h> supplies
1144 prototypes for the various gethost*() functions.
1145 See also netdbtype.U for probing for various netdb types.
1147 d_getitimer (d_getitimer.U):
1148 This variable conditionally defines the HAS_GETITIMER symbol, which
1149 indicates to the C program that the getitimer() routine is available.
1151 d_getlogin (d_getlogin.U):
1152 This variable conditionally defines the HAS_GETLOGIN symbol, which
1153 indicates to the C program that the getlogin() routine is available
1154 to get the login name.
1156 d_getlogin_r (d_getlogin_r.U):
1157 This variable conditionally defines the HAS_GETLOGIN_R symbol,
1158 which indicates to the C program that the getlogin_r()
1159 routine is available.
1161 d_getmnt (d_getmnt.U):
1162 This variable conditionally defines the HAS_GETMNT symbol, which
1163 indicates to the C program that the getmnt() routine is available
1164 to retrieve one or more mount info blocks by filename.
1166 d_getmntent (d_getmntent.U):
1167 This variable conditionally defines the HAS_GETMNTENT symbol, which
1168 indicates to the C program that the getmntent() routine is available
1169 to iterate through mounted files to get their mount info.
1171 d_getnameinfo (d_getnameinfo.U):
1172 This variable conditionally defines the HAS_GETNAMEINFO symbol,
1173 which indicates to the C program that the getnameinfo() function
1176 d_getnbyaddr (d_getnbyad.U):
1177 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
1178 indicates to the C program that the getnetbyaddr() routine is available
1179 to look up networks by their IP addresses.
1181 d_getnbyname (d_getnbynm.U):
1182 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
1183 indicates to the C program that the getnetbyname() routine is available
1184 to look up networks by their names.
1186 d_getnent (d_getnent.U):
1187 This variable conditionally defines HAS_GETNETENT if getnetent() is
1188 available to look up network names in some data base or another.
1190 d_getnetbyaddr_r (d_getnetbyaddr_r.U):
1191 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
1192 which indicates to the C program that the getnetbyaddr_r()
1193 routine is available.
1195 d_getnetbyname_r (d_getnetbyname_r.U):
1196 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
1197 which indicates to the C program that the getnetbyname_r()
1198 routine is available.
1200 d_getnetent_r (d_getnetent_r.U):
1201 This variable conditionally defines the HAS_GETNETENT_R symbol,
1202 which indicates to the C program that the getnetent_r()
1203 routine is available.
1205 d_getnetprotos (d_getnetprotos.U):
1206 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1207 which indicates to the C program that <netdb.h> supplies
1208 prototypes for the various getnet*() functions.
1209 See also netdbtype.U for probing for various netdb types.
1211 d_getpagsz (d_getpagsz.U):
1212 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1213 is available to get the system page size.
1215 d_getpbyname (d_getprotby.U):
1216 This variable conditionally defines the HAS_GETPROTOBYNAME
1217 symbol, which indicates to the C program that the
1218 getprotobyname() routine is available to look up protocols
1221 d_getpbynumber (d_getprotby.U):
1222 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1223 symbol, which indicates to the C program that the
1224 getprotobynumber() routine is available to look up protocols
1227 d_getpent (d_getpent.U):
1228 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1229 available to look up protocols in some data base or another.
1231 d_getpgid (d_getpgid.U):
1232 This variable conditionally defines the HAS_GETPGID symbol, which
1233 indicates to the C program that the getpgid(pid) function
1234 is available to get the process group id.
1236 d_getpgrp (d_getpgrp.U):
1237 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1238 available to get the current process group.
1240 d_getpgrp2 (d_getpgrp2.U):
1241 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1242 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1243 is available to get the current process group.
1245 d_getppid (d_getppid.U):
1246 This variable conditionally defines the HAS_GETPPID symbol, which
1247 indicates to the C program that the getppid() routine is available
1248 to get the parent process ID.
1250 d_getprior (d_getprior.U):
1251 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1252 is available to get a process's priority.
1254 d_getprotobyname_r (d_getprotobyname_r.U):
1255 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1256 which indicates to the C program that the getprotobyname_r()
1257 routine is available.
1259 d_getprotobynumber_r (d_getprotobynumber_r.U):
1260 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1261 which indicates to the C program that the getprotobynumber_r()
1262 routine is available.
1264 d_getprotoent_r (d_getprotoent_r.U):
1265 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1266 which indicates to the C program that the getprotoent_r()
1267 routine is available.
1269 d_getprotoprotos (d_getprotoprotos.U):
1270 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1271 which indicates to the C program that <netdb.h> supplies
1272 prototypes for the various getproto*() functions.
1273 See also netdbtype.U for probing for various netdb types.
1275 d_getprpwnam (d_getprpwnam.U):
1276 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1277 available to retrieve protected (shadow) password entries by name.
1279 d_getpwent (d_getpwent.U):
1280 This variable conditionally defines the HAS_GETPWENT symbol, which
1281 indicates to the C program that the getpwent() routine is available
1282 for sequential access of the passwd database.
1284 d_getpwent_r (d_getpwent_r.U):
1285 This variable conditionally defines the HAS_GETPWENT_R symbol,
1286 which indicates to the C program that the getpwent_r()
1287 routine is available.
1289 d_getpwnam_r (d_getpwnam_r.U):
1290 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1291 which indicates to the C program that the getpwnam_r()
1292 routine is available.
1294 d_getpwuid_r (d_getpwuid_r.U):
1295 This variable conditionally defines the HAS_GETPWUID_R symbol,
1296 which indicates to the C program that the getpwuid_r()
1297 routine is available.
1299 d_getsbyname (d_getsrvby.U):
1300 This variable conditionally defines the HAS_GETSERVBYNAME
1301 symbol, which indicates to the C program that the
1302 getservbyname() routine is available to look up services
1305 d_getsbyport (d_getsrvby.U):
1306 This variable conditionally defines the HAS_GETSERVBYPORT
1307 symbol, which indicates to the C program that the
1308 getservbyport() routine is available to look up services
1311 d_getsent (d_getsent.U):
1312 This variable conditionally defines HAS_GETSERVENT if getservent() is
1313 available to look up network services in some data base or another.
1315 d_getservbyname_r (d_getservbyname_r.U):
1316 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1317 which indicates to the C program that the getservbyname_r()
1318 routine is available.
1320 d_getservbyport_r (d_getservbyport_r.U):
1321 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1322 which indicates to the C program that the getservbyport_r()
1323 routine is available.
1325 d_getservent_r (d_getservent_r.U):
1326 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1327 which indicates to the C program that the getservent_r()
1328 routine is available.
1330 d_getservprotos (d_getservprotos.U):
1331 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1332 which indicates to the C program that <netdb.h> supplies
1333 prototypes for the various getserv*() functions.
1334 See also netdbtype.U for probing for various netdb types.
1336 d_getspnam (d_getspnam.U):
1337 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1338 available to retrieve SysV shadow password entries by name.
1340 d_getspnam_r (d_getspnam_r.U):
1341 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1342 which indicates to the C program that the getspnam_r()
1343 routine is available.
1345 d_gettimeod (d_ftime.U):
1346 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1347 indicates that the gettimeofday() system call exists (to obtain a
1348 sub-second accuracy clock). You should probably include <sys/resource.h>.
1350 d_gmtime64 (d_timefuncs64.U):
1351 This variable conditionally defines the HAS_GMTIME64 symbol, which
1352 indicates to the C program that the gmtime64 () routine is available.
1354 d_gmtime_r (d_gmtime_r.U):
1355 This variable conditionally defines the HAS_GMTIME_R symbol,
1356 which indicates to the C program that the gmtime_r()
1357 routine is available.
1359 d_gnulibc (d_gnulibc.U):
1360 Defined if we're dealing with the GNU C Library.
1362 d_grpasswd (i_grp.U):
1363 This variable conditionally defines GRPASSWD, which indicates
1364 that struct group in <grp.h> contains gr_passwd.
1366 d_has_C_UTF8 (d_setlocale.U):
1367 This variable is set to either "true" or "false" depending on
1368 whether the compilation system supports the C.UTF-8 locale.
1370 d_hasmntopt (d_hasmntopt.U):
1371 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1372 indicates to the C program that the hasmntopt() routine is available
1373 to query the mount options of file systems.
1375 d_htonl (d_htonl.U):
1376 This variable conditionally defines HAS_HTONL if htonl() and its
1377 friends are available to do network order byte swapping.
1379 d_hypot (d_hypot.U):
1380 This variable conditionally defines HAS_HYPOT if hypot is available
1381 for numerically stable hypotenuse function.
1383 d_ilogb (d_ilogb.U):
1384 This variable conditionally defines the HAS_ILOGB symbol, which
1385 indicates to the C program that the ilogb() routine is available
1386 for extracting the exponent of double x as a signed integer.
1388 d_ilogbl (d_ilogbl.U):
1389 This variable conditionally defines the HAS_ILOGBL symbol, which
1390 indicates to the C program that the ilogbl() routine is available
1391 for extracting the exponent of long double x as a signed integer.
1392 If scalbnl is also present we can emulate frexpl.
1394 d_inc_version_list (inc_version_list.U):
1395 This variable conditionally defines PERL_INC_VERSION_LIST.
1396 It is set to undef when PERL_INC_VERSION_LIST is empty.
1398 d_inetaton (d_inetaton.U):
1399 This variable conditionally defines the HAS_INET_ATON symbol, which
1400 indicates to the C program that the inet_aton() function is available
1401 to parse IP address "dotted-quad" strings.
1403 d_inetntop (d_inetntop.U):
1404 This variable conditionally defines the HAS_INETNTOP symbol,
1405 which indicates to the C program that the inet_ntop() function
1408 d_inetpton (d_inetpton.U):
1409 This variable conditionally defines the HAS_INETPTON symbol,
1410 which indicates to the C program that the inet_pton() function
1413 d_int64_t (d_int64_t.U):
1414 This symbol will be defined if the C compiler supports int64_t.
1416 d_ip_mreq (d_socket.U):
1417 This variable conditionally defines the HAS_IP_MREQ symbol, which
1418 indicates the availability of a struct ip_mreq.
1420 d_ip_mreq_source (d_socket.U):
1421 This variable conditionally defines the HAS_IP_MREQ_SOURCE symbol,
1422 which indicates the availability of a struct ip_mreq_source.
1424 d_ipv6_mreq (d_socket.U):
1425 This variable conditionally defines the HAS_IPV6_MREQ symbol, which
1426 indicates the availability of a struct ipv6_mreq.
1428 d_ipv6_mreq_source (d_socket.U):
1429 This variable conditionally defines the HAS_IPV6_MREQ_SOURCE symbol,
1430 which indicates the availability of a struct ipv6_mreq_source.
1432 d_isascii (d_isascii.U):
1433 This variable conditionally defines the HAS_ISASCII constant,
1434 which indicates to the C program that isascii() is available.
1436 d_isblank (d_isblank.U):
1437 This variable conditionally defines the HAS_ISBLANK constant,
1438 which indicates to the C program that isblank() is available.
1440 d_isfinite (d_isfinite.U):
1441 This variable conditionally defines the HAS_ISFINITE symbol, which
1442 indicates to the C program that the isfinite() routine is available.
1444 d_isfinitel (d_isfinitel.U):
1445 This variable conditionally defines the HAS_ISFINITEL symbol, which
1446 indicates to the C program that the isfinitel() routine is available.
1448 d_isinf (d_isinf.U):
1449 This variable conditionally defines the HAS_ISINF symbol, which
1450 indicates to the C program that the isinf() routine is available.
1452 d_isinfl (d_isinfl.U):
1453 This variable conditionally defines the HAS_ISINFL symbol, which
1454 indicates to the C program that the isinfl() routine is available.
1456 d_isless (d_isless.U):
1457 This variable conditionally defines the HAS_ISLESS symbol, which
1458 indicates to the C program that the isless() routine is available.
1460 d_isnan (d_isnan.U):
1461 This variable conditionally defines the HAS_ISNAN symbol, which
1462 indicates to the C program that the isnan() routine is available.
1464 d_isnanl (d_isnanl.U):
1465 This variable conditionally defines the HAS_ISNANL symbol, which
1466 indicates to the C program that the isnanl() routine is available.
1468 d_isnormal (d_isnormal.U):
1469 This variable conditionally defines the HAS_ISNORMAL symbol, which
1470 indicates to the C program that the isnormal() routine is available.
1473 This variable conditionally defines the HAS_J0 symbol, which
1474 indicates to the C program that the j0() routine is available.
1477 This variable conditionally defines the HAS_J0L symbol, which
1478 indicates to the C program that the j0l() routine is available.
1480 d_killpg (d_killpg.U):
1481 This variable conditionally defines the HAS_KILLPG symbol, which
1482 indicates to the C program that the killpg() routine is available
1483 to kill process groups.
1485 d_lc_monetary_2008 (d_lc_monetary_2008.U):
1486 This variable conditionally defines HAS_LC_MONETARY_2008 if libc
1487 has the international currency locale rules from POSIX
1490 d_lchown (d_lchown.U):
1491 This variable conditionally defines the HAS_LCHOWN symbol, which
1492 indicates to the C program that the lchown() routine is available
1493 to operate on a symbolic link (instead of following the link).
1495 d_ldbl_dig (d_ldbl_dig.U):
1496 This variable conditionally defines d_ldbl_dig if this system's
1497 header files provide LDBL_DIG, which is the number of significant
1498 digits in a long double precision number.
1500 d_ldexpl (d_longdbl.U):
1501 This variable conditionally defines the HAS_LDEXPL symbol, which
1502 indicates to the C program that the ldexpl() routine is available.
1504 d_lgamma (d_lgamma.U):
1505 This variable conditionally defines the HAS_LGAMMA symbol, which
1506 indicates to the C program that the lgamma() routine is available
1507 for the log gamma function. See also d_tgamma and d_lgamma_r.
1509 d_lgamma_r (d_lgamma_r.U):
1510 This variable conditionally defines the HAS_LGAMMA_R symbol, which
1511 indicates to the C program that the lgamma_r() routine is available
1512 for the log gamma function, without using the global signgam variable.
1514 d_libm_lib_version (d_libm_lib_version.U):
1515 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1516 which indicates to the C program that math.h defines _LIB_VERSION
1517 being available in libm
1519 d_libname_unique (so.U):
1520 This variable is defined if the target system insists on unique
1521 basenames for shared library files. This is currently true on Android,
1522 false everywhere else we know of.
1523 Defaults to 'undef'.
1526 This variable conditionally defines HAS_LINK if link() is
1527 available to create hard links.
1529 d_linkat (d_fsat.U):
1530 This variable conditionally defines the HAS_LINKAT symbol, which
1531 indicates the POSIX linkat() function is available.
1533 d_llrint (d_llrint.U):
1534 This variable conditionally defines the HAS_LLRINT symbol, which
1535 indicates to the C program that the llrint() routine is available
1536 to return the long long value closest to a double (according
1537 to the current rounding mode).
1539 d_llrintl (d_llrintl.U):
1540 This variable conditionally defines the HAS_LLRINTL symbol, which
1541 indicates to the C program that the llrintl() routine is available
1542 to return the long long value closest to a long double (according
1543 to the current rounding mode).
1545 d_llround (d_llround.U):
1546 This variable conditionally defines the HAS_LLROUND symbol, which
1547 indicates to the C program that the llround() routine is available
1548 to return the long long value nearest to x.
1550 d_llroundl (d_llroundl.U):
1551 This variable conditionally defines the HAS_LLROUNDL symbol, which
1552 indicates to the C program that the llroundl() routine is available
1553 to return the long long value nearest to x away from zero.
1555 d_localeconv_l (d_localeconv_l.U):
1556 This variable conditionally defines the HAS_LOCALECONV_L symbol, which
1557 indicates to the C program that the localeconv_l() routine is available.
1559 d_localtime64 (d_timefuncs64.U):
1560 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1561 indicates to the C program that the localtime64 () routine is available.
1563 d_localtime_r (d_localtime_r.U):
1564 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1565 which indicates to the C program that the localtime_r()
1566 routine is available.
1568 d_localtime_r_needs_tzset (d_localtime_r.U):
1569 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1570 symbol, which makes us call tzset before localtime_r()
1572 d_locconv (d_locconv.U):
1573 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1574 available for numeric and monetary formatting conventions.
1576 d_lockf (d_lockf.U):
1577 This variable conditionally defines HAS_LOCKF if lockf() is
1578 available to do file locking.
1580 d_log1p (d_log1p.U):
1581 This variable conditionally defines the HAS_LOG1P symbol, which
1582 indicates to the C program that the logp1() routine is available
1583 to compute log(1 + x) for values of x close to zero.
1586 This variable conditionally defines the HAS_LOG2 symbol, which
1587 indicates to the C program that the log2() routine is available
1588 to compute log base two.
1591 This variable conditionally defines the HAS_LOGB symbol, which
1592 indicates to the C program that the logb() routine is available
1593 to extract the exponent of x.
1595 d_long_double_style_ieee (d_longdbl.U):
1596 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE
1597 if the long double is any of the IEEE 754 style long doubles:
1598 LONG_DOUBLE_STYLE_IEEE_STD, LONG_DOUBLE_STYLE_IEEE_EXTENDED,
1599 LONG_DOUBLE_STYLE_IEEE_DOUBLEDOUBLE.
1601 d_long_double_style_ieee_doubledouble (d_longdbl.U):
1602 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_DOUBLEDOUBLE
1603 if the long double is the 128-bit IEEE 754 double-double.
1605 d_long_double_style_ieee_extended (d_longdbl.U):
1606 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_EXTENDED
1607 if the long double is the 80-bit IEEE 754 extended precision.
1608 Note that despite the 'extended' this is less than the 'std',
1609 since thisis an extension of the double precision.
1611 d_long_double_style_ieee_std (d_longdbl.U):
1612 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_STD
1613 if the long double is the 128-bit IEEE 754.
1615 d_long_double_style_vax (d_longdbl.U):
1616 This variable conditionally defines LONG_DOUBLE_STYLE_VAX
1617 if the long double is the 128-bit VAX format H.
1619 d_longdbl (d_longdbl.U):
1620 This variable conditionally defines HAS_LONG_DOUBLE if
1621 the long double type is supported.
1623 d_longlong (d_longlong.U):
1624 This variable conditionally defines HAS_LONG_LONG if
1625 the long long type is supported.
1627 d_lrint (d_lrint.U):
1628 This variable conditionally defines the HAS_LRINT symbol, which
1629 indicates to the C program that the lrint() routine is available
1630 to return the integral value closest to a double (according
1631 to the current rounding mode).
1633 d_lrintl (d_lrintl.U):
1634 This variable conditionally defines the HAS_LRINTL symbol, which
1635 indicates to the C program that the lrintl() routine is available
1636 to return the integral value closest to a long double (according
1637 to the current rounding mode).
1639 d_lround (d_lround.U):
1640 This variable conditionally defines the HAS_LROUND symbol, which
1641 indicates to the C program that the lround() routine is available
1642 to return the integral value nearest to x.
1644 d_lroundl (d_lroundl.U):
1645 This variable conditionally defines the HAS_LROUNDL symbol, which
1646 indicates to the C program that the lroundl() routine is available
1647 to return the integral value nearest to x away from zero.
1649 d_lseekproto (d_lseekproto.U):
1650 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1651 which indicates to the C program that the system provides
1652 a prototype for the lseek() function. Otherwise, it is
1653 up to the program to supply one.
1655 d_lstat (d_lstat.U):
1656 This variable conditionally defines HAS_LSTAT if lstat() is
1657 available to do file stats on symbolic links.
1659 d_madvise (d_madvise.U):
1660 This variable conditionally defines HAS_MADVISE if madvise() is
1661 available to map a file into memory.
1663 d_malloc_good_size (d_malloc_size.U):
1664 This symbol, if defined, indicates that the malloc_good_size
1665 routine is available for use.
1667 d_malloc_size (d_malloc_size.U):
1668 This symbol, if defined, indicates that the malloc_size
1669 routine is available for use.
1671 d_malloc_usable_size (d_malloc_size.U):
1672 This symbol, if defined, indicates that the malloc_usable_size
1673 routine is available for use.
1675 d_mblen (d_mblen.U):
1676 This variable conditionally defines the HAS_MBLEN symbol, which
1677 indicates to the C program that the mblen() routine is available
1678 to find the number of bytes in a multibye character.
1680 d_mbrlen (d_mbrlen.U):
1681 This variable conditionally defines the HAS_MBRLEN symbol if the
1682 mbrlen() routine is available to be used to get the length of
1683 multi-byte character strings.
1685 d_mbrtowc (d_mbrtowc.U):
1686 This variable conditionally defines the HAS_MBRTOWC symbol if the
1687 mbrtowc() routine is available to be used to convert a multi-byte
1688 character into a wide character.
1690 d_mbstowcs (d_mbstowcs.U):
1691 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1692 indicates to the C program that the mbstowcs() routine is available
1693 to convert a multibyte string into a wide character string.
1695 d_mbtowc (d_mbtowc.U):
1696 This variable conditionally defines the HAS_MBTOWC symbol, which
1697 indicates to the C program that the mbtowc() routine is available
1698 to convert multibyte to a wide character.
1700 d_memmem (d_memmem.U):
1701 This variable conditionally defines the HAS_MEMMEM symbol, which
1702 indicates to the C program that the memmem() routine is available
1703 to return a pointer to the start of the first occurance of a
1704 substring in a memory area (or NULL if not found).
1706 d_memrchr (d_memrchr.U):
1707 This variable conditionally defines the HAS_MEMRCHR symbol, which
1708 indicates to the C program that the memrchr() routine is available
1709 to return a pointer to the last occurrence of a byte in a memory
1710 area (or NULL if not found).
1712 d_mkdir (d_mkdir.U):
1713 This variable conditionally defines the HAS_MKDIR symbol, which
1714 indicates to the C program that the mkdir() routine is available
1715 to create directories..
1717 d_mkdtemp (d_mkdtemp.U):
1718 This variable conditionally defines the HAS_MKDTEMP symbol, which
1719 indicates to the C program that the mkdtemp() routine is available
1720 to exclusively create a uniquely named temporary directory.
1722 d_mkfifo (d_mkfifo.U):
1723 This variable conditionally defines the HAS_MKFIFO symbol, which
1724 indicates to the C program that the mkfifo() routine is available.
1726 d_mkostemp (d_mkostemp.U):
1727 This variable conditionally defines HAS_MKOSTEMP if mkostemp() is
1728 available to exclusively create and open a uniquely named (with a
1729 suffix) temporary file.
1731 d_mkstemp (d_mkstemp.U):
1732 This variable conditionally defines the HAS_MKSTEMP symbol, which
1733 indicates to the C program that the mkstemp() routine is available
1734 to exclusively create and open a uniquely named temporary file.
1736 d_mkstemps (d_mkstemps.U):
1737 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1738 indicates to the C program that the mkstemps() routine is available
1739 to exclusively create and open a uniquely named (with a suffix)
1742 d_mktime (d_mktime.U):
1743 This variable conditionally defines the HAS_MKTIME symbol, which
1744 indicates to the C program that the mktime() routine is available.
1746 d_mktime64 (d_timefuncs64.U):
1747 This variable conditionally defines the HAS_MKTIME64 symbol, which
1748 indicates to the C program that the mktime64 () routine is available.
1751 This variable conditionally defines HAS_MMAP if mmap() is
1752 available to map a file into memory.
1754 d_modfl (d_modfl.U):
1755 This variable conditionally defines the HAS_MODFL symbol, which
1756 indicates to the C program that the modfl() routine is available.
1758 d_modflproto (d_modfl.U):
1759 This symbol, if defined, indicates that the system provides
1760 a prototype for the modfl() function. Otherwise, it is up
1761 to the program to supply one. C99 says it should be
1762 long double modfl(long double, long double *);
1764 d_mprotect (d_mprotect.U):
1765 This variable conditionally defines HAS_MPROTECT if mprotect() is
1766 available to modify the access protection of a memory mapped file.
1769 This variable conditionally defines the HAS_MSG symbol, which
1770 indicates that the entire msg*(2) library is present.
1772 d_msg_ctrunc (d_socket.U):
1773 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1774 which indicates that the MSG_CTRUNC is available. #ifdef is
1775 not enough because it may be an enum, glibc has been known to do this.
1777 d_msg_dontroute (d_socket.U):
1778 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1779 which indicates that the MSG_DONTROUTE is available. #ifdef is
1780 not enough because it may be an enum, glibc has been known to do this.
1782 d_msg_oob (d_socket.U):
1783 This variable conditionally defines the HAS_MSG_OOB symbol,
1784 which indicates that the MSG_OOB is available. #ifdef is
1785 not enough because it may be an enum, glibc has been known to do this.
1787 d_msg_peek (d_socket.U):
1788 This variable conditionally defines the HAS_MSG_PEEK symbol,
1789 which indicates that the MSG_PEEK is available. #ifdef is
1790 not enough because it may be an enum, glibc has been known to do this.
1792 d_msg_proxy (d_socket.U):
1793 This variable conditionally defines the HAS_MSG_PROXY symbol,
1794 which indicates that the MSG_PROXY is available. #ifdef is
1795 not enough because it may be an enum, glibc has been known to do this.
1797 d_msgctl (d_msgctl.U):
1798 This variable conditionally defines the HAS_MSGCTL symbol, which
1799 indicates to the C program that the msgctl() routine is available.
1801 d_msgget (d_msgget.U):
1802 This variable conditionally defines the HAS_MSGGET symbol, which
1803 indicates to the C program that the msgget() routine is available.
1805 d_msghdr_s (d_msghdr_s.U):
1806 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1807 which indicates that the struct msghdr is supported.
1809 d_msgrcv (d_msgrcv.U):
1810 This variable conditionally defines the HAS_MSGRCV symbol, which
1811 indicates to the C program that the msgrcv() routine is available.
1813 d_msgsnd (d_msgsnd.U):
1814 This variable conditionally defines the HAS_MSGSND symbol, which
1815 indicates to the C program that the msgsnd() routine is available.
1817 d_msync (d_msync.U):
1818 This variable conditionally defines HAS_MSYNC if msync() is
1819 available to synchronize a mapped file.
1821 d_munmap (d_munmap.U):
1822 This variable conditionally defines HAS_MUNMAP if munmap() is
1823 available to unmap a region mapped by mmap().
1825 d_mymalloc (mallocsrc.U):
1826 This variable conditionally defines MYMALLOC in case other parts
1827 of the source want to take special action if MYMALLOC is used.
1828 This may include different sorts of profiling or error detection.
1831 This variable conditionally defines HAS_NAN if nan() is
1832 available to generate NaN.
1834 d_nanosleep (d_nanosleep.U):
1835 This variable conditionally defines HAS_NANOSLEEP
1836 if nanosleep() is available to sleep with 1E-9 sec accuracy.
1839 This variable conditionally defines the HAS_NDBM symbol, which
1840 indicates that both the ndbm.h include file and an appropriate ndbm
1841 library exist. Consult the different i_*ndbm variables
1842 to find out the actual include location. Sometimes, a system has the
1843 header file but not the library. This variable will only be set if
1844 the system has both.
1846 d_ndbm_h_uses_prototypes (i_ndbm.U):
1847 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1848 which indicates that the ndbm.h include file uses real ANSI C
1849 prototypes instead of K&R style function declarations. K&R style
1850 declarations are unsupported in C++, so the include file requires
1851 special handling when using a C++ compiler and this variable is
1852 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1853 to get the same information for alternative ndbm.h include files.
1855 d_nearbyint (d_nearbyint.U):
1856 This variable conditionally defines HAS_NEARBYINT if nearbyint()
1857 is available to return the integral value closest to (according to
1858 the current rounding mode) to x.
1860 d_newlocale (d_newlocale.U):
1861 This variable conditionally defines the HAS_NEWLOCALE symbol, which
1862 indicates to the C program that the newlocale() routine is available
1863 to return a new locale object or modify an existing locale object.
1865 d_nextafter (d_nextafter.U):
1866 This variable conditionally defines HAS_NEXTAFTER if nextafter()
1867 is available to return the next machine representable double from
1870 d_nexttoward (d_nexttoward.U):
1871 This variable conditionally defines HAS_NEXTTOWARD if nexttoward()
1872 is available to return the next machine representable long double from
1876 This variable conditionally defines the HAS_NICE symbol, which
1877 indicates to the C program that the nice() routine is available.
1879 d_nl_langinfo (d_nl_langinfo.U):
1880 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1881 indicates to the C program that the nl_langinfo() routine is available.
1883 d_nv_preserves_uv (perlxv.U):
1884 This variable indicates whether a variable of type nvtype
1885 can preserve all the bits a variable of type uvtype.
1887 d_nv_zero_is_allbits_zero (perlxv.U):
1888 This variable indicates whether a variable of type nvtype
1889 stores 0.0 in memory as all bits zero.
1891 d_off64_t (d_off64_t.U):
1892 This symbol will be defined if the C compiler supports off64_t.
1894 d_old_pthread_create_joinable (d_pthrattrj.U):
1895 This variable conditionally defines pthread_create_joinable.
1896 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1898 d_oldpthreads (usethreads.U):
1899 This variable conditionally defines the OLD_PTHREADS_API symbol,
1900 and indicates that Perl should be built to use the old
1901 draft POSIX threads API. This is only potentially meaningful if
1904 d_oldsock (d_socket.U):
1905 This variable conditionally defines the OLDSOCKET symbol, which
1906 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1908 d_open3 (d_open3.U):
1909 This variable conditionally defines the HAS_OPEN3 manifest constant,
1910 which indicates to the C program that the 3 argument version of
1911 the open(2) function is available.
1913 d_openat (d_fsat.U):
1914 This variable conditionally defines the HAS_OPENAT symbol, which
1915 indicates the POSIX openat() function is available.
1917 d_pathconf (d_pathconf.U):
1918 This variable conditionally defines the HAS_PATHCONF symbol, which
1919 indicates to the C program that the pathconf() routine is available
1920 to determine file-system related limits and options associated
1921 with a given filename.
1923 d_pause (d_pause.U):
1924 This variable conditionally defines the HAS_PAUSE symbol, which
1925 indicates to the C program that the pause() routine is available
1926 to suspend a process until a signal is received.
1928 d_perl_otherlibdirs (otherlibdirs.U):
1929 This variable conditionally defines PERL_OTHERLIBDIRS, which
1930 contains a colon-separated set of paths for the perl binary to
1931 include in @INC. See also otherlibdirs.
1933 d_phostname (d_gethname.U):
1934 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1935 contains the shell command which, when fed to popen(), may be
1936 used to derive the host name.
1939 This variable conditionally defines the HAS_PIPE symbol, which
1940 indicates to the C program that the pipe() routine is available
1941 to create an inter-process channel.
1943 d_pipe2 (d_pipe2.U):
1944 This variable conditionally defines the HAS_PIPE2 symbol, which
1945 indicates to the C program that the pipe2() routine is available
1946 to create an inter-process channel.
1949 This variable conditionally defines the HAS_POLL symbol, which
1950 indicates to the C program that the poll() routine is available
1951 to poll active file descriptors.
1953 d_portable (d_portable.U):
1954 This variable conditionally defines the PORTABLE symbol, which
1955 indicates to the C program that it should not assume that it is
1956 running on the machine it was compiled on.
1958 d_prctl (d_prctl.U):
1959 This variable conditionally defines the HAS_PRCTL symbol, which
1960 indicates to the C program that the prctl() routine is available.
1961 Note that there are at least two prctl variants: Linux and Irix.
1962 While they are somewhat similar, they are incompatible.
1964 d_prctl_set_name (d_prctl.U):
1965 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
1966 which indicates to the C program that the prctl() routine supports
1967 the PR_SET_NAME option.
1969 d_PRId64 (quadfio.U):
1970 This variable conditionally defines the PERL_PRId64 symbol, which
1971 indicates that stdio has a symbol to print 64-bit decimal numbers.
1973 d_PRIeldbl (longdblfio.U):
1974 This variable conditionally defines the PERL_PRIfldbl symbol, which
1975 indicates that stdio has a symbol to print long doubles.
1977 d_PRIEUldbl (longdblfio.U):
1978 This variable conditionally defines the PERL_PRIfldbl symbol, which
1979 indicates that stdio has a symbol to print long doubles.
1980 The 'U' in the name is to separate this from d_PRIeldbl so that even
1981 case-blind systems can see the difference.
1983 d_PRIfldbl (longdblfio.U):
1984 This variable conditionally defines the PERL_PRIfldbl symbol, which
1985 indicates that stdio has a symbol to print long doubles.
1987 d_PRIFUldbl (longdblfio.U):
1988 This variable conditionally defines the PERL_PRIfldbl symbol, which
1989 indicates that stdio has a symbol to print long doubles.
1990 The 'U' in the name is to separate this from d_PRIfldbl so that even
1991 case-blind systems can see the difference.
1993 d_PRIgldbl (longdblfio.U):
1994 This variable conditionally defines the PERL_PRIfldbl symbol, which
1995 indicates that stdio has a symbol to print long doubles.
1997 d_PRIGUldbl (longdblfio.U):
1998 This variable conditionally defines the PERL_PRIfldbl symbol, which
1999 indicates that stdio has a symbol to print long doubles.
2000 The 'U' in the name is to separate this from d_PRIgldbl so that even
2001 case-blind systems can see the difference.
2003 d_PRIi64 (quadfio.U):
2004 This variable conditionally defines the PERL_PRIi64 symbol, which
2005 indicates that stdio has a symbol to print 64-bit decimal numbers.
2007 d_printf_format_null (d_attribut.U):
2008 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
2009 indicates the C compiler allows printf-like formats to be null.
2011 d_PRIo64 (quadfio.U):
2012 This variable conditionally defines the PERL_PRIo64 symbol, which
2013 indicates that stdio has a symbol to print 64-bit octal numbers.
2015 d_PRIu64 (quadfio.U):
2016 This variable conditionally defines the PERL_PRIu64 symbol, which
2017 indicates that stdio has a symbol to print 64-bit unsigned decimal
2020 d_PRIx64 (quadfio.U):
2021 This variable conditionally defines the PERL_PRIx64 symbol, which
2022 indicates that stdio has a symbol to print 64-bit hexadecimal numbers.
2024 d_PRIXU64 (quadfio.U):
2025 This variable conditionally defines the PERL_PRIXU64 symbol, which
2026 indicates that stdio has a symbol to print 64-bit hExADECimAl numbers.
2027 The 'U' in the name is to separate this from d_PRIx64 so that even
2028 case-blind systems can see the difference.
2030 d_procselfexe (d_procselfexe.U):
2031 Defined if $procselfexe is symlink to the absolute
2032 pathname of the executing program.
2034 d_pseudofork (d_vfork.U):
2035 This variable conditionally defines the HAS_PSEUDOFORK symbol,
2036 which indicates that an emulation of the fork routine is available.
2038 d_pthread_atfork (d_pthread_atfork.U):
2039 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
2040 which indicates to the C program that the pthread_atfork()
2041 routine is available.
2043 d_pthread_attr_setscope (d_pthread_attr_ss.U):
2044 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
2045 pthread_attr_setscope() is available to set the contention scope
2046 attribute of a thread attribute object.
2048 d_pthread_yield (d_pthread_y.U):
2049 This variable conditionally defines the HAS_PTHREAD_YIELD
2050 symbol if the pthread_yield routine is available to yield
2051 the execution of the current thread.
2053 d_ptrdiff_t (d_ptrdiff_t.U):
2054 This symbol will be defined if the C compiler supports ptrdiff_t.
2057 This variable conditionally defines PWAGE, which indicates
2058 that struct passwd contains pw_age.
2060 d_pwchange (i_pwd.U):
2061 This variable conditionally defines PWCHANGE, which indicates
2062 that struct passwd contains pw_change.
2064 d_pwclass (i_pwd.U):
2065 This variable conditionally defines PWCLASS, which indicates
2066 that struct passwd contains pw_class.
2068 d_pwcomment (i_pwd.U):
2069 This variable conditionally defines PWCOMMENT, which indicates
2070 that struct passwd contains pw_comment.
2072 d_pwexpire (i_pwd.U):
2073 This variable conditionally defines PWEXPIRE, which indicates
2074 that struct passwd contains pw_expire.
2076 d_pwgecos (i_pwd.U):
2077 This variable conditionally defines PWGECOS, which indicates
2078 that struct passwd contains pw_gecos.
2080 d_pwpasswd (i_pwd.U):
2081 This variable conditionally defines PWPASSWD, which indicates
2082 that struct passwd contains pw_passwd.
2084 d_pwquota (i_pwd.U):
2085 This variable conditionally defines PWQUOTA, which indicates
2086 that struct passwd contains pw_quota.
2088 d_qgcvt (d_qgcvt.U):
2089 This variable conditionally defines the HAS_QGCVT symbol, which
2090 indicates to the C program that the qgcvt() routine is available.
2092 d_quad (quadtype.U):
2093 This variable, if defined, tells that there's a 64-bit integer type,
2096 d_querylocale (d_newlocale.U):
2097 This variable conditionally defines the HAS_QUERYLOCALE symbol, which
2098 indicates to the C program that the querylocale() routine is available
2099 to return the name of the locale for a category mask.
2101 d_random_r (d_random_r.U):
2102 This variable conditionally defines the HAS_RANDOM_R symbol,
2103 which indicates to the C program that the random_r()
2104 routine is available.
2106 d_re_comp (d_regcmp.U):
2107 This variable conditionally defines the HAS_RECOMP symbol, which
2108 indicates to the C program that the re_comp() routine is available
2109 for regular pattern matching (usually on BSD). If so, it is likely that
2112 d_readdir (d_readdir.U):
2113 This variable conditionally defines HAS_READDIR if readdir() is
2114 available to read directory entries.
2116 d_readdir64_r (d_readdir64_r.U):
2117 This variable conditionally defines the HAS_READDIR64_R symbol,
2118 which indicates to the C program that the readdir64_r()
2119 routine is available.
2121 d_readdir_r (d_readdir_r.U):
2122 This variable conditionally defines the HAS_READDIR_R symbol,
2123 which indicates to the C program that the readdir_r()
2124 routine is available.
2126 d_readlink (d_readlink.U):
2127 This variable conditionally defines the HAS_READLINK symbol, which
2128 indicates to the C program that the readlink() routine is available
2129 to read the value of a symbolic link.
2131 d_readv (d_readv.U):
2132 This variable conditionally defines the HAS_READV symbol, which
2133 indicates to the C program that the readv() routine is available.
2135 d_recvmsg (d_recvmsg.U):
2136 This variable conditionally defines the HAS_RECVMSG symbol, which
2137 indicates to the C program that the recvmsg() routine is available.
2139 d_regcmp (d_regcmp.U):
2140 This variable conditionally defines the HAS_REGCMP symbol, which
2141 indicates to the C program that the regcmp() routine is available
2142 for regular pattern matching (usually on System V).
2144 d_regcomp (d_regcmp.U):
2145 This variable conditionally defines the HAS_REGCOMP symbol, which
2146 indicates to the C program that the regcomp() routine is available
2147 for regular pattern matching (usually on POSIX.2 conforming systems).
2149 d_remainder (d_remainder.U):
2150 This variable conditionally defines the HAS_REMAINDER symbol, which
2151 indicates to the C program that the remainder() routine is available.
2153 d_remquo (d_remquo.U):
2154 This variable conditionally defines the HAS_REMQUO symbol, which
2155 indicates to the C program that the remquo() routine is available.
2157 d_rename (d_rename.U):
2158 This variable conditionally defines the HAS_RENAME symbol, which
2159 indicates to the C program that the rename() routine is available
2162 d_renameat (d_fsat.U):
2163 This variable conditionally defines the HAS_RENAMEAT symbol, which
2164 indicates the POSIX renameat() function is available.
2166 d_rewinddir (d_readdir.U):
2167 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
2171 This variable conditionally defines the HAS_RINT symbol, which
2172 indicates to the C program that the rint() routine is available.
2174 d_rmdir (d_rmdir.U):
2175 This variable conditionally defines HAS_RMDIR if rmdir() is
2176 available to remove directories.
2178 d_round (d_round.U):
2179 This variable conditionally defines the HAS_ROUND symbol, which
2180 indicates to the C program that the round() routine is available.
2182 d_sbrkproto (d_sbrkproto.U):
2183 This variable conditionally defines the HAS_SBRK_PROTO symbol,
2184 which indicates to the C program that the system provides
2185 a prototype for the sbrk() function. Otherwise, it is
2186 up to the program to supply one.
2188 d_scalbn (d_scalbn.U):
2189 This variable conditionally defines the HAS_SCALBN symbol, which
2190 indicates to the C program that the scalbn() routine is available.
2192 d_scalbnl (d_scalbnl.U):
2193 This variable conditionally defines the HAS_SCALBNL symbol, which
2194 indicates to the C program that the scalbnl() routine is available.
2195 If ilogbl is also present we can emulate frexpl.
2197 d_sched_yield (d_pthread_y.U):
2198 This variable conditionally defines the HAS_SCHED_YIELD
2199 symbol if the sched_yield routine is available to yield
2200 the execution of the current thread.
2202 d_scm_rights (d_socket.U):
2203 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
2204 which indicates that the SCM_RIGHTS is available. #ifdef is
2205 not enough because it may be an enum, glibc has been known to do this.
2207 d_SCNfldbl (longdblfio.U):
2208 This variable conditionally defines the PERL_PRIfldbl symbol, which
2209 indicates that stdio has a symbol to scan long doubles.
2211 d_seekdir (d_readdir.U):
2212 This variable conditionally defines HAS_SEEKDIR if seekdir() is
2215 d_select (d_select.U):
2216 This variable conditionally defines HAS_SELECT if select() is
2217 available to select active file descriptors. A <sys/time.h>
2218 inclusion may be necessary for the timeout field.
2221 This variable conditionally defines the HAS_SEM symbol, which
2222 indicates that the entire sem*(2) library is present.
2224 d_semctl (d_semctl.U):
2225 This variable conditionally defines the HAS_SEMCTL symbol, which
2226 indicates to the C program that the semctl() routine is available.
2228 d_semctl_semid_ds (d_union_semun.U):
2229 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
2230 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
2232 d_semctl_semun (d_union_semun.U):
2233 This variable conditionally defines USE_SEMCTL_SEMUN, which
2234 indicates that union semun is to be used for semctl IPC_STAT.
2236 d_semget (d_semget.U):
2237 This variable conditionally defines the HAS_SEMGET symbol, which
2238 indicates to the C program that the semget() routine is available.
2240 d_semop (d_semop.U):
2241 This variable conditionally defines the HAS_SEMOP symbol, which
2242 indicates to the C program that the semop() routine is available.
2244 d_sendmsg (d_sendmsg.U):
2245 This variable conditionally defines the HAS_SENDMSG symbol, which
2246 indicates to the C program that the sendmsg() routine is available.
2248 d_setegid (d_setegid.U):
2249 This variable conditionally defines the HAS_SETEGID symbol, which
2250 indicates to the C program that the setegid() routine is available
2251 to change the effective gid of the current program.
2253 d_seteuid (d_seteuid.U):
2254 This variable conditionally defines the HAS_SETEUID symbol, which
2255 indicates to the C program that the seteuid() routine is available
2256 to change the effective uid of the current program.
2258 d_setgrent (d_setgrent.U):
2259 This variable conditionally defines the HAS_SETGRENT symbol, which
2260 indicates to the C program that the setgrent() routine is available
2261 for initializing sequential access to the group database.
2263 d_setgrent_r (d_setgrent_r.U):
2264 This variable conditionally defines the HAS_SETGRENT_R symbol,
2265 which indicates to the C program that the setgrent_r()
2266 routine is available.
2268 d_setgrps (d_setgrps.U):
2269 This variable conditionally defines the HAS_SETGROUPS symbol, which
2270 indicates to the C program that the setgroups() routine is available
2271 to set the list of process groups.
2273 d_sethent (d_sethent.U):
2274 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
2277 d_sethostent_r (d_sethostent_r.U):
2278 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
2279 which indicates to the C program that the sethostent_r()
2280 routine is available.
2282 d_setitimer (d_setitimer.U):
2283 This variable conditionally defines the HAS_SETITIMER symbol, which
2284 indicates to the C program that the setitimer() routine is available.
2286 d_setlinebuf (d_setlnbuf.U):
2287 This variable conditionally defines the HAS_SETLINEBUF symbol, which
2288 indicates to the C program that the setlinebuf() routine is available
2289 to change stderr or stdout from block-buffered or unbuffered to a
2292 d_setlocale (d_setlocale.U):
2293 This variable conditionally defines HAS_SETLOCALE if setlocale() is
2294 available to handle locale-specific ctype implementations.
2296 d_setlocale_accepts_any_locale_name (d_setlocale.U):
2297 This variable conditionally defines SETLOCALE_ACCEPTS_ANY_LOCALE_NAME
2298 if setlocale() accepts any locale name.
2300 d_setlocale_r (d_setlocale_r.U):
2301 This variable conditionally defines the HAS_SETLOCALE_R symbol,
2302 which indicates to the C program that the setlocale_r()
2303 routine is available.
2305 d_setnent (d_setnent.U):
2306 This variable conditionally defines HAS_SETNETENT if setnetent() is
2309 d_setnetent_r (d_setnetent_r.U):
2310 This variable conditionally defines the HAS_SETNETENT_R symbol,
2311 which indicates to the C program that the setnetent_r()
2312 routine is available.
2314 d_setpent (d_setpent.U):
2315 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
2318 d_setpgid (d_setpgid.U):
2319 This variable conditionally defines the HAS_SETPGID symbol if the
2320 setpgid(pid, gpid) function is available to set process group ID.
2322 d_setpgrp (d_setpgrp.U):
2323 This variable conditionally defines HAS_SETPGRP if setpgrp() is
2324 available to set the current process group.
2326 d_setpgrp2 (d_setpgrp2.U):
2327 This variable conditionally defines the HAS_SETPGRP2 symbol, which
2328 indicates to the C program that the setpgrp2() (as in DG/UX) routine
2329 is available to set the current process group.
2331 d_setprior (d_setprior.U):
2332 This variable conditionally defines HAS_SETPRIORITY if setpriority()
2333 is available to set a process's priority.
2335 d_setproctitle (d_setproctitle.U):
2336 This variable conditionally defines the HAS_SETPROCTITLE symbol,
2337 which indicates to the C program that the setproctitle() routine
2340 d_setprotoent_r (d_setprotoent_r.U):
2341 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
2342 which indicates to the C program that the setprotoent_r()
2343 routine is available.
2345 d_setpwent (d_setpwent.U):
2346 This variable conditionally defines the HAS_SETPWENT symbol, which
2347 indicates to the C program that the setpwent() routine is available
2348 for initializing sequential access to the passwd database.
2350 d_setpwent_r (d_setpwent_r.U):
2351 This variable conditionally defines the HAS_SETPWENT_R symbol,
2352 which indicates to the C program that the setpwent_r()
2353 routine is available.
2355 d_setregid (d_setregid.U):
2356 This variable conditionally defines HAS_SETREGID if setregid() is
2357 available to change the real and effective gid of the current
2360 d_setresgid (d_setregid.U):
2361 This variable conditionally defines HAS_SETRESGID if setresgid() is
2362 available to change the real, effective and saved gid of the current
2365 d_setresuid (d_setreuid.U):
2366 This variable conditionally defines HAS_SETREUID if setresuid() is
2367 available to change the real, effective and saved uid of the current
2370 d_setreuid (d_setreuid.U):
2371 This variable conditionally defines HAS_SETREUID if setreuid() is
2372 available to change the real and effective uid of the current
2375 d_setrgid (d_setrgid.U):
2376 This variable conditionally defines the HAS_SETRGID symbol, which
2377 indicates to the C program that the setrgid() routine is available
2378 to change the real gid of the current program.
2380 d_setruid (d_setruid.U):
2381 This variable conditionally defines the HAS_SETRUID symbol, which
2382 indicates to the C program that the setruid() routine is available
2383 to change the real uid of the current program.
2385 d_setsent (d_setsent.U):
2386 This variable conditionally defines HAS_SETSERVENT if setservent() is
2389 d_setservent_r (d_setservent_r.U):
2390 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2391 which indicates to the C program that the setservent_r()
2392 routine is available.
2394 d_setsid (d_setsid.U):
2395 This variable conditionally defines HAS_SETSID if setsid() is
2396 available to set the process group ID.
2398 d_setvbuf (d_setvbuf.U):
2399 This variable conditionally defines the HAS_SETVBUF symbol, which
2400 indicates to the C program that the setvbuf() routine is available
2401 to change buffering on an open stdio stream.
2404 This variable conditionally defines the HAS_SHM symbol, which
2405 indicates that the entire shm*(2) library is present.
2407 d_shmat (d_shmat.U):
2408 This variable conditionally defines the HAS_SHMAT symbol, which
2409 indicates to the C program that the shmat() routine is available.
2411 d_shmatprototype (d_shmat.U):
2412 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
2413 symbol, which indicates that sys/shm.h has a prototype for
2416 d_shmctl (d_shmctl.U):
2417 This variable conditionally defines the HAS_SHMCTL symbol, which
2418 indicates to the C program that the shmctl() routine is available.
2420 d_shmdt (d_shmdt.U):
2421 This variable conditionally defines the HAS_SHMDT symbol, which
2422 indicates to the C program that the shmdt() routine is available.
2424 d_shmget (d_shmget.U):
2425 This variable conditionally defines the HAS_SHMGET symbol, which
2426 indicates to the C program that the shmget() routine is available.
2428 d_sigaction (d_sigaction.U):
2429 This variable conditionally defines the HAS_SIGACTION symbol, which
2430 indicates that the Vr4 sigaction() routine is available.
2432 d_siginfo_si_addr (d_siginfo_si.U):
2433 This variable conditionally defines the HAS_SIGINFO_SI_ADDR symbol,
2434 which indicates that the siginfo_t struct has the si_addr member.
2436 d_siginfo_si_band (d_siginfo_si.U):
2437 This variable conditionally defines the HAS_SIGINFO_SI_BAND symbol,
2438 which indicates that the siginfo_t struct has the si_band member.
2440 d_siginfo_si_errno (d_siginfo_si.U):
2441 This variable conditionally defines the HAS_SIGINFO_SI_ERRNO symbol,
2442 which indicates that the siginfo_t struct has the si_errno member.
2444 d_siginfo_si_fd (d_siginfo_si.U):
2445 This variable conditionally defines the HAS_SIGINFO_SI_FD symbol,
2446 which indicates that the siginfo_t struct has the si_fd member.
2448 d_siginfo_si_pid (d_siginfo_si.U):
2449 This variable conditionally defines the HAS_SIGINFO_SI_PID symbol,
2450 which indicates that the siginfo_t struct has the si_pid member.
2452 d_siginfo_si_status (d_siginfo_si.U):
2453 This variable conditionally defines the HAS_SIGINFO_SI_STATUS symbol,
2454 which indicates that the siginfo_t struct has the si_status member.
2456 d_siginfo_si_uid (d_siginfo_si.U):
2457 This variable conditionally defines the HAS_SIGINFO_SI_UID symbol,
2458 which indicates that the siginfo_t struct has the si_uid member.
2460 d_siginfo_si_value (d_siginfo_si.U):
2461 This variable conditionally defines the HAS_SIGINFO_SI_VALUE symbol,
2462 which indicates that the siginfo_t struct has the si_value member.
2464 d_signbit (d_signbit.U):
2465 This variable conditionally defines the HAS_SIGNBIT symbol, which
2466 indicates to the C program that the signbit() routine is available
2467 and safe to use with perl's intern NV type.
2469 d_sigprocmask (d_sigprocmask.U):
2470 This variable conditionally defines HAS_SIGPROCMASK
2471 if sigprocmask() is available to examine or change the signal mask
2472 of the calling process.
2474 d_sigsetjmp (d_sigsetjmp.U):
2475 This variable conditionally defines the HAS_SIGSETJMP symbol,
2476 which indicates that the sigsetjmp() routine is available to
2477 call setjmp() and optionally save the process's signal mask.
2479 d_sin6_scope_id (d_socket.U):
2480 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2481 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2484 d_sitearch (sitearch.U):
2485 This variable conditionally defines SITEARCH to hold the pathname
2486 of architecture-dependent library files for $package. If
2487 $sitearch is the same as $archlib, then this is set to undef.
2489 d_snprintf (d_snprintf.U):
2490 This variable conditionally defines the HAS_SNPRINTF symbol, which
2491 indicates to the C program that the snprintf () library function
2494 d_sockaddr_in6 (d_socket.U):
2495 This variable conditionally defines the HAS_SOCKADDR_IN6 symbol, which
2496 indicates the availability of a struct sockaddr_in6.
2498 d_sockaddr_sa_len (d_socket.U):
2499 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2500 which indicates that a struct sockaddr structure has the sa_len
2503 d_sockaddr_storage (d_socket.U):
2504 This variable conditionally defines the HAS_SOCKADDR_STORAGE symbol,
2505 which indicates the availability of a struct sockaddr_storage.
2507 d_sockatmark (d_sockatmark.U):
2508 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2509 indicates to the C program that the sockatmark() routine is available.
2511 d_sockatmarkproto (d_sockatmarkproto.U):
2512 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2513 which indicates to the C program that the system provides
2514 a prototype for the sockatmark() function. Otherwise, it is
2515 up to the program to supply one.
2517 d_socket (d_socket.U):
2518 This variable conditionally defines HAS_SOCKET, which indicates
2519 that the BSD socket interface is supported.
2521 d_socklen_t (d_socklen_t.U):
2522 This symbol will be defined if the C compiler supports socklen_t.
2524 d_sockpair (d_socket.U):
2525 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2526 indicates that the BSD socketpair() is supported.
2528 d_socks5_init (d_socks5_init.U):
2529 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2530 indicates to the C program that the socks5_init() routine is available.
2532 d_sqrtl (d_sqrtl.U):
2533 This variable conditionally defines the HAS_SQRTL symbol, which
2534 indicates to the C program that the sqrtl() routine is available.
2536 d_srand48_r (d_srand48_r.U):
2537 This variable conditionally defines the HAS_SRAND48_R symbol,
2538 which indicates to the C program that the srand48_r()
2539 routine is available.
2541 d_srandom_r (d_srandom_r.U):
2542 This variable conditionally defines the HAS_SRANDOM_R symbol,
2543 which indicates to the C program that the srandom_r()
2544 routine is available.
2546 d_sresgproto (d_sresgproto.U):
2547 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2548 which indicates to the C program that the system provides
2549 a prototype for the setresgid() function. Otherwise, it is
2550 up to the program to supply one.
2552 d_sresuproto (d_sresuproto.U):
2553 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2554 which indicates to the C program that the system provides
2555 a prototype for the setresuid() function. Otherwise, it is
2556 up to the program to supply one.
2559 This variable conditionally defines HAS_STAT if stat() is
2560 available to get file status.
2562 d_statblks (d_statblks.U):
2563 This variable conditionally defines USE_STAT_BLOCKS
2564 if this system has a stat structure declaring
2565 st_blksize and st_blocks.
2567 d_statfs_f_flags (d_statfs_f_flags.U):
2568 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
2569 symbol, which indicates to struct statfs from has f_flags member.
2570 This kind of struct statfs is coming from sys/mount.h (BSD),
2571 not from sys/statfs.h (SYSV).
2573 d_statfs_s (d_statfs_s.U):
2574 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2575 which indicates that the struct statfs is supported.
2577 d_static_inline (d_static_inline.U):
2578 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2579 which indicates that the C compiler supports C99-style static
2580 inline. That is, the function can't be called from another
2583 d_statvfs (d_statvfs.U):
2584 This variable conditionally defines the HAS_STATVFS symbol, which
2585 indicates to the C program that the statvfs() routine is available.
2587 d_stdio_cnt_lval (d_stdstdio.U):
2588 This variable conditionally defines STDIO_CNT_LVALUE if the
2589 FILE_cnt macro can be used as an lvalue.
2591 d_stdio_ptr_lval (d_stdstdio.U):
2592 This variable conditionally defines STDIO_PTR_LVALUE if the
2593 FILE_ptr macro can be used as an lvalue.
2595 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2596 This symbol is defined if using the FILE_ptr macro as an lvalue
2597 to increase the pointer by n leaves File_cnt(fp) unchanged.
2599 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2600 This symbol is defined if using the FILE_ptr macro as an lvalue
2601 to increase the pointer by n has the side effect of decreasing the
2602 value of File_cnt(fp) by n.
2604 d_stdio_stream_array (stdio_streams.U):
2605 This variable tells whether there is an array holding
2608 d_stdiobase (d_stdstdio.U):
2609 This variable conditionally defines USE_STDIO_BASE if this system
2610 has a FILE structure declaring a usable _base field (or equivalent)
2613 d_stdstdio (d_stdstdio.U):
2614 This variable conditionally defines USE_STDIO_PTR if this system
2615 has a FILE structure declaring usable _ptr and _cnt fields (or
2616 equivalent) in stdio.h.
2618 d_strcoll (d_strcoll.U):
2619 This variable conditionally defines HAS_STRCOLL if strcoll() is
2620 available to compare strings using collating information.
2622 d_strerror_l (d_strerror_l.U):
2623 This variable conditionally defines the HAS_STRERROR_L symbol, which
2624 indicates to the C program that the strerror_l() routine is available
2625 to return the error message for a given errno value in a particular
2626 locale (identified by a locale_t object).
2628 d_strerror_r (d_strerror_r.U):
2629 This variable conditionally defines the HAS_STRERROR_R symbol,
2630 which indicates to the C program that the strerror_r()
2631 routine is available.
2633 d_strftime (d_strftime.U):
2634 This variable conditionally defines the HAS_STRFTIME symbol, which
2635 indicates to the C program that the strftime() routine is available.
2637 d_strlcat (d_strlcat.U):
2638 This variable conditionally defines the HAS_STRLCAT symbol, which
2639 indicates to the C program that the strlcat () routine is available.
2641 d_strlcpy (d_strlcpy.U):
2642 This variable conditionally defines the HAS_STRLCPY symbol, which
2643 indicates to the C program that the strlcpy () routine is available.
2645 d_strnlen (d_strnlen.U):
2646 This variable conditionally defines the HAS_STRNLEN symbol, which
2647 indicates to the C program that the strnlen () routine is available.
2649 d_strtod (d_strtod.U):
2650 This variable conditionally defines the HAS_STRTOD symbol, which
2651 indicates to the C program that the strtod() routine is available
2652 to provide better numeric string conversion than atof().
2654 d_strtod_l (d_strtod_l.U):
2655 This variable conditionally defines the HAS_STRTOD_L symbol, which
2656 indicates to the C program that the strtod_l() routine is available.
2658 d_strtol (d_strtol.U):
2659 This variable conditionally defines the HAS_STRTOL symbol, which
2660 indicates to the C program that the strtol() routine is available
2661 to provide better numeric string conversion than atoi() and friends.
2663 d_strtold (d_strtold.U):
2664 This variable conditionally defines the HAS_STRTOLD symbol, which
2665 indicates to the C program that the strtold() routine is available.
2667 d_strtold_l (d_strtold_l.U):
2668 This variable conditionally defines the HAS_STRTOLD_L symbol, which
2669 indicates to the C program that the strtold_l() routine is available.
2671 d_strtoll (d_strtoll.U):
2672 This variable conditionally defines the HAS_STRTOLL symbol, which
2673 indicates to the C program that the strtoll() routine is available.
2675 d_strtoq (d_strtoq.U):
2676 This variable conditionally defines the HAS_STRTOQ symbol, which
2677 indicates to the C program that the strtoq() routine is available.
2679 d_strtoul (d_strtoul.U):
2680 This variable conditionally defines the HAS_STRTOUL symbol, which
2681 indicates to the C program that the strtoul() routine is available
2682 to provide conversion of strings to unsigned long.
2684 d_strtoull (d_strtoull.U):
2685 This variable conditionally defines the HAS_STRTOULL symbol, which
2686 indicates to the C program that the strtoull() routine is available.
2688 d_strtouq (d_strtouq.U):
2689 This variable conditionally defines the HAS_STRTOUQ symbol, which
2690 indicates to the C program that the strtouq() routine is available.
2692 d_strxfrm (d_strxfrm.U):
2693 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2694 available to transform strings.
2696 d_suidsafe (d_dosuid.U):
2697 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2698 if setuid scripts can be secure. This test looks in /dev/fd/.
2700 d_symlink (d_symlink.U):
2701 This variable conditionally defines the HAS_SYMLINK symbol, which
2702 indicates to the C program that the symlink() routine is available
2703 to create symbolic links.
2705 d_syscall (d_syscall.U):
2706 This variable conditionally defines HAS_SYSCALL if syscall() is
2707 available call arbitrary system calls.
2709 d_syscallproto (d_syscallproto.U):
2710 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2711 which indicates to the C program that the system provides
2712 a prototype for the syscall() function. Otherwise, it is
2713 up to the program to supply one.
2715 d_sysconf (d_sysconf.U):
2716 This variable conditionally defines the HAS_SYSCONF symbol, which
2717 indicates to the C program that the sysconf() routine is available
2718 to determine system related limits and options.
2720 d_sysernlst (d_strerror.U):
2721 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2722 is available to translate error numbers to the symbolic name.
2724 d_syserrlst (d_strerror.U):
2725 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2726 available to translate error numbers to strings.
2728 d_system (d_system.U):
2729 This variable conditionally defines HAS_SYSTEM if system() is
2730 available to issue a shell command.
2732 d_tcgetpgrp (d_tcgtpgrp.U):
2733 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2734 indicates to the C program that the tcgetpgrp() routine is available.
2735 to get foreground process group ID.
2737 d_tcsetpgrp (d_tcstpgrp.U):
2738 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2739 indicates to the C program that the tcsetpgrp() routine is available
2740 to set foreground process group ID.
2742 d_telldir (d_readdir.U):
2743 This variable conditionally defines HAS_TELLDIR if telldir() is
2746 d_telldirproto (d_telldirproto.U):
2747 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2748 which indicates to the C program that the system provides
2749 a prototype for the telldir() function. Otherwise, it is
2750 up to the program to supply one.
2752 d_tgamma (d_tgamma.U):
2753 This variable conditionally defines the HAS_TGAMMA symbol, which
2754 indicates to the C program that the tgamma() routine is available
2755 for the gamma function. See also d_lgamma.
2757 d_thread_safe_nl_langinfo_l (d_nl_langinfo_l.U):
2758 This variable contains the eventual value of the
2759 HAS_THREAD_SAFE_NL_LANGINFO_L symbol, which indicates if the
2760 nl_langinfo_l() function exists and is thread-safe.
2763 This variable conditionally defines the HAS_TIME symbol, which indicates
2764 that the time() routine exists. The time() routine is normally
2765 provided on UNIX systems.
2767 d_timegm (d_timegm.U):
2768 This variable conditionally defines the HAS_TIMEGM symbol, which
2769 indicates to the C program that the timegm () routine is available.
2771 d_times (d_times.U):
2772 This variable conditionally defines the HAS_TIMES symbol, which indicates
2773 that the times() routine exists. The times() routine is normally
2774 provided on UNIX systems. You may have to include <sys/times.h>.
2776 d_tm_tm_gmtoff (i_time.U):
2777 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2778 to the C program that the struct tm has the tm_gmtoff field.
2780 d_tm_tm_zone (i_time.U):
2781 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2782 to the C program that the struct tm has the tm_zone field.
2784 d_tmpnam_r (d_tmpnam_r.U):
2785 This variable conditionally defines the HAS_TMPNAM_R symbol,
2786 which indicates to the C program that the tmpnam_r()
2787 routine is available.
2789 d_towlower (d_towlower.U):
2790 This variable conditionally defines the HAS_TOWLOWER symbol, which
2791 indicates to the C program that the towlower() routine is available.
2793 d_towupper (d_towupper.U):
2794 This variable conditionally defines the HAS_TOWUPPER symbol, which
2795 indicates to the C program that the towupper() routine is available.
2797 d_trunc (d_trunc.U):
2798 This variable conditionally defines the HAS_TRUNC symbol, which
2799 indicates to the C program that the trunc() routine is available
2800 to round doubles towards zero.
2802 d_truncate (d_truncate.U):
2803 This variable conditionally defines HAS_TRUNCATE if truncate() is
2804 available to truncate files.
2806 d_truncl (d_truncl.U):
2807 This variable conditionally defines the HAS_TRUNCL symbol, which
2808 indicates to the C program that the truncl() routine is available
2809 to round long doubles towards zero. If copysignl is also present,
2810 we can emulate modfl.
2812 d_ttyname_r (d_ttyname_r.U):
2813 This variable conditionally defines the HAS_TTYNAME_R symbol,
2814 which indicates to the C program that the ttyname_r()
2815 routine is available.
2817 d_tzname (d_tzname.U):
2818 This variable conditionally defines HAS_TZNAME if tzname[] is
2819 available to access timezone names.
2821 d_u32align (d_u32align.U):
2822 This variable tells whether you must access character data
2823 through U32-aligned pointers.
2825 d_ualarm (d_ualarm.U):
2826 This variable conditionally defines the HAS_UALARM symbol, which
2827 indicates to the C program that the ualarm() routine is available.
2829 d_umask (d_umask.U):
2830 This variable conditionally defines the HAS_UMASK symbol, which
2831 indicates to the C program that the umask() routine is available.
2832 to set and get the value of the file creation mask.
2834 d_uname (d_gethname.U):
2835 This variable conditionally defines the HAS_UNAME symbol, which
2836 indicates to the C program that the uname() routine may be
2837 used to derive the host name.
2839 d_union_semun (d_union_semun.U):
2840 This variable conditionally defines HAS_UNION_SEMUN if the
2841 union semun is defined by including <sys/sem.h>.
2843 d_unlinkat (d_fsat.U):
2844 This variable conditionally defines the HAS_UNLINKAT symbol, which
2845 indicates the POSIX unlinkat() function isavailable.
2847 d_unordered (d_unordered.U):
2848 This variable conditionally defines the HAS_UNORDERED symbol, which
2849 indicates to the C program that the unordered() routine is available.
2851 d_unsetenv (d_unsetenv.U):
2852 This variable conditionally defines the HAS_UNSETENV symbol, which
2853 indicates to the C program that the unsetenv () routine is available.
2855 d_uselocale (d_newlocale.U):
2856 This variable conditionally defines the HAS_USELOCALE symbol, which
2857 indicates to the C program that the uselocale() routine is available
2858 to set the current locale for the calling thread.
2860 d_usleep (d_usleep.U):
2861 This variable conditionally defines HAS_USLEEP if usleep() is
2862 available to do high granularity sleeps.
2864 d_usleepproto (d_usleepproto.U):
2865 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2866 which indicates to the C program that the system provides
2867 a prototype for the usleep() function. Otherwise, it is
2868 up to the program to supply one.
2870 d_ustat (d_ustat.U):
2871 This variable conditionally defines HAS_USTAT if ustat() is
2872 available to query file system statistics by dev_t.
2874 d_vendorarch (vendorarch.U):
2875 This variable conditionally defined PERL_VENDORARCH.
2877 d_vendorbin (vendorbin.U):
2878 This variable conditionally defines PERL_VENDORBIN.
2880 d_vendorlib (vendorlib.U):
2881 This variable conditionally defines PERL_VENDORLIB.
2883 d_vendorscript (vendorscript.U):
2884 This variable conditionally defines PERL_VENDORSCRIPT.
2886 d_vfork (d_vfork.U):
2887 This variable conditionally defines the HAS_VFORK symbol, which
2888 indicates the vfork() routine is available.
2890 d_void_closedir (d_closedir.U):
2891 This variable conditionally defines VOID_CLOSEDIR if closedir()
2892 does not return a value.
2894 d_voidsig (d_voidsig.U):
2895 This variable conditionally defines VOIDSIG if this system
2896 declares "void (*signal(...))()" in signal.h. The old way was to
2897 declare it as "int (*signal(...))()".
2899 d_voidtty (i_sysioctl.U):
2900 This variable conditionally defines USE_IOCNOTTY to indicate that the
2901 ioctl() call with TIOCNOTTY should be used to void tty association.
2902 Otherwise (on USG probably), it is enough to close the standard file
2903 descriptors and do a setpgrp().
2905 d_vsnprintf (d_snprintf.U):
2906 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2907 indicates to the C program that the vsnprintf () library function
2910 d_wait4 (d_wait4.U):
2911 This variable conditionally defines the HAS_WAIT4 symbol, which
2912 indicates the wait4() routine is available.
2914 d_waitpid (d_waitpid.U):
2915 This variable conditionally defines HAS_WAITPID if waitpid() is
2916 available to wait for child process.
2918 d_wcrtomb (d_wcrtomb.U):
2919 This variable conditionally defines the HAS_WCRTOMB symbol if the
2920 wcrtomb() routine is available to be used to convert a wide character
2921 into a multi-byte character.
2923 d_wcscmp (d_wcscmp.U):
2924 This variable conditionally defines the HAS_WCSCMP symbol if the
2925 wcscmp() routine is available and can be used to compare wide
2928 d_wcstombs (d_wcstombs.U):
2929 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2930 indicates to the C program that the wcstombs() routine is available
2931 to convert wide character strings to multibyte strings.
2933 d_wcsxfrm (d_wcsxfrm.U):
2934 This variable conditionally defines the HAS_WCSXFRM symbol if the
2935 wcsxfrm() routine is available and can be used to compare wide
2938 d_wctomb (d_wctomb.U):
2939 This variable conditionally defines the HAS_WCTOMB symbol, which
2940 indicates to the C program that the wctomb() routine is available
2941 to convert a wide character to a multibyte.
2943 d_writev (d_writev.U):
2944 This variable conditionally defines the HAS_WRITEV symbol, which
2945 indicates to the C program that the writev() routine is available.
2948 This variable conditionally defines the symbol XENIX, which alerts
2949 the C program that it runs under Xenix.
2952 This variable is used internally by Configure to determine the
2953 full pathname (if any) of the date program. After Configure runs,
2954 the value is reset to a plain "date" and is not useful.
2956 db_hashtype (i_db.U):
2957 This variable contains the type of the hash structure element
2958 in the <db.h> header file. In older versions of DB, it was
2959 int, while in newer ones it is u_int32_t.
2961 db_prefixtype (i_db.U):
2962 This variable contains the type of the prefix structure element
2963 in the <db.h> header file. In older versions of DB, it was
2964 int, while in newer ones it is size_t.
2966 db_version_major (i_db.U):
2967 This variable contains the major version number of
2968 Berkeley DB found in the <db.h> header file.
2970 db_version_minor (i_db.U):
2971 This variable contains the minor version number of
2972 Berkeley DB found in the <db.h> header file.
2973 For DB version 1 this is always 0.
2975 db_version_patch (i_db.U):
2976 This variable contains the patch version number of
2977 Berkeley DB found in the <db.h> header file.
2978 For DB version 1 this is always 0.
2980 default_inc_excludes_dot (defaultincdot.U):
2981 When defined, remove the legacy '.' from @INC
2983 direntrytype (i_dirent.U):
2984 This symbol is set to 'struct direct' or 'struct dirent' depending on
2985 whether dirent is available or not. You should use this pseudo type to
2986 portably declare your directory entries.
2989 This variable contains the extension that is to be used for the
2990 dynamically loaded modules that perl generates.
2993 This variable contains the name of the dynamic loading file that
2994 will be used with the package.
2996 doubleinfbytes (infnan.U):
2997 This variable contains comma-separated list of hexadecimal bytes
2998 for the double precision infinity.
3000 doublekind (longdblfio.U):
3001 This variable, if defined, encodes the type of a double:
3002 1 = IEEE 754 32-bit little endian,
3003 2 = IEEE 754 32-bit big endian,
3004 3 = IEEE 754 64-bit little endian,
3005 4 = IEEE 754 64-bit big endian,
3006 5 = IEEE 754 128-bit little endian,
3007 6 = IEEE 754 128-bit big endian,
3008 7 = IEEE 754 64-bit mixed endian le-be,
3009 8 = IEEE 754 64-bit mixed endian be-le,
3010 9 = VAX 32bit little endian F float format
3011 10 = VAX 64bit little endian D float format
3012 11 = VAX 64bit little endian G float format
3013 12 = IBM 32bit format
3014 13 = IBM 64bit format
3015 14 = Cray 64bit format
3016 -1 = unknown format.
3018 doublemantbits (mantbits.U):
3019 This symbol, if defined, tells how many mantissa bits
3020 there are in double precision floating point format.
3021 Note that this is usually DBL_MANT_DIG minus one, since
3022 with the standard IEEE 754 formats DBL_MANT_DIG includes
3023 the implicit bit which doesn't really exist.
3025 doublenanbytes (infnan.U):
3026 This variable contains comma-separated list of hexadecimal bytes
3027 for the double precision not-a-number.
3029 doublesize (doublesize.U):
3030 This variable contains the value of the DOUBLESIZE symbol, which
3031 indicates to the C program how many bytes there are in a double.
3033 drand01 (randfunc.U):
3034 Indicates the macro to be used to generate normalized
3035 random numbers. Uses randfunc, often divided by
3036 (double) (((unsigned long) 1 << randbits)) in order to
3037 normalize the result.
3038 In C programs, the macro 'Drand01' is mapped to drand01.
3040 drand48_r_proto (d_drand48_r.U):
3041 This variable encodes the prototype of drand48_r.
3042 It is zero if d_drand48_r is undef, and one of the
3043 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
3046 dtrace (usedtrace.U):
3047 This variable holds the location of the dtrace executable.
3049 dtraceobject (dtraceobject.U):
3050 Whether we need to build an object file with the dtrace tool.
3052 dtracexnolibs (dtraceobject.U):
3053 Whether dtrace accepts -xnolibs. If available we call dtrace -h
3054 and dtrace -G with -xnolibs to allow dtrace to run in a jail on
3057 dynamic_ext (Extensions.U):
3058 This variable holds a list of XS extension files we want to
3059 link dynamically into the package. It is used by Makefile.
3061 eagain (nblock_io.U):
3062 This variable bears the symbolic errno code set by read() when no
3063 data is present on the file and non-blocking I/O was enabled (otherwise,
3064 read() blocks naturally).
3067 This variable conditionally defines EBCDIC if this
3068 system uses EBCDIC encoding.
3071 This variable is used internally by Configure to determine the
3072 full pathname (if any) of the echo program. After Configure runs,
3073 the value is reset to a plain "echo" and is not useful.
3076 This variable is used internally by Configure to determine the
3077 full pathname (if any) of the egrep program. After Configure runs,
3078 the value is reset to a plain "egrep" and is not useful.
3081 This variable is defined but not used by Configure.
3082 The value is the empty string and is not useful.
3084 endgrent_r_proto (d_endgrent_r.U):
3085 This variable encodes the prototype of endgrent_r.
3086 It is zero if d_endgrent_r is undef, and one of the
3087 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
3090 endhostent_r_proto (d_endhostent_r.U):
3091 This variable encodes the prototype of endhostent_r.
3092 It is zero if d_endhostent_r is undef, and one of the
3093 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
3096 endnetent_r_proto (d_endnetent_r.U):
3097 This variable encodes the prototype of endnetent_r.
3098 It is zero if d_endnetent_r is undef, and one of the
3099 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
3102 endprotoent_r_proto (d_endprotoent_r.U):
3103 This variable encodes the prototype of endprotoent_r.
3104 It is zero if d_endprotoent_r is undef, and one of the
3105 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
3108 endpwent_r_proto (d_endpwent_r.U):
3109 This variable encodes the prototype of endpwent_r.
3110 It is zero if d_endpwent_r is undef, and one of the
3111 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
3114 endservent_r_proto (d_endservent_r.U):
3115 This variable encodes the prototype of endservent_r.
3116 It is zero if d_endservent_r is undef, and one of the
3117 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
3121 When running under Eunice this variable contains a command which will
3122 convert a shell script to the proper form of text file for it to be
3123 executable by the shell. On other systems it is a no-op.
3126 This is an old synonym for _exe.
3129 This variable is used internally by Configure to determine the
3130 full pathname (if any) of the expr program. After Configure runs,
3131 the value is reset to a plain "expr" and is not useful.
3133 extensions (Extensions.U):
3134 This variable holds a list of all extension files (both XS and
3135 non-xs) installed with the package. It is propagated to Config.pm
3136 and is typically used to test whether a particular extension
3140 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
3141 variable can be used in Configure to do the right thing.
3144 This variable holds a list of extra modules to install.
3146 fflushall (fflushall.U):
3147 This symbol, if defined, tells that to flush
3148 all pending stdio output one must loop through all
3149 the stdio file handles stored in an array and fflush them.
3150 Note that if fflushNULL is defined, fflushall will not
3151 even be probed for and will be left undefined.
3153 fflushNULL (fflushall.U):
3154 This symbol, if defined, tells that fflush(NULL) correctly
3155 flushes all pending stdio output without side effects. In
3156 particular, on some platforms calling fflush(NULL) *still*
3157 corrupts STDIN if it is a pipe.
3160 This variable is defined but not used by Configure.
3161 The value is the empty string and is not useful.
3163 firstmakefile (Unix.U):
3164 This variable defines the first file searched by make. On unix,
3165 it is makefile (then Makefile). On case-insensitive systems,
3166 it might be something else. This is only used to deal with
3167 convoluted make depend tricks.
3170 This variable is defined but not used by Configure.
3171 The value is the empty string and is not useful.
3173 fpossize (fpossize.U):
3174 This variable contains the size of a fpostype in bytes.
3176 fpostype (fpostype.U):
3177 This variable defines Fpos_t to be something like fpos_t, long,
3178 uint, or whatever type is used to declare file positions in libc.
3180 freetype (mallocsrc.U):
3181 This variable contains the return type of free(). It is usually
3182 void, but occasionally int.
3185 This variable contains the command used by Configure
3186 to copy files from the target host. Useful and available
3187 only during Perl build.
3188 The string ':' if not cross-compiling.
3191 This variable contains the full pathname to 'ar', whether or
3192 not the user has specified 'portability'. This is only used
3196 This variable contains the full pathname to 'csh', whether or
3197 not the user has specified 'portability'. This is only used
3198 in the compiled C program, and we assume that all systems which
3199 can share this executable will have the same full pathname to
3202 full_sed (Loc_sed.U):
3203 This variable contains the full pathname to 'sed', whether or
3204 not the user has specified 'portability'. This is only used
3205 in the compiled C program, and we assume that all systems which
3206 can share this executable will have the same full pathname to
3209 gccansipedantic (gccvers.U):
3210 If GNU cc (gcc) is used, this variable will enable (if set) the
3211 -ansi and -pedantic ccflags for building core files (through
3212 cflags script). (See Porting/pumpkin.pod for full description).
3214 gccosandvers (gccvers.U):
3215 If GNU cc (gcc) is used, this variable holds the operating system
3216 and version used to compile gcc. It is set to '' if not gcc,
3217 or if nothing useful can be parsed as the os version.
3219 gccversion (gccvers.U):
3220 If GNU cc (gcc) is used, this variable holds '1' or '2' to
3221 indicate whether the compiler is version 1 or 2. This is used in
3222 setting some of the default cflags. It is set to '' if not gcc.
3224 getgrent_r_proto (d_getgrent_r.U):
3225 This variable encodes the prototype of getgrent_r.
3226 It is zero if d_getgrent_r is undef, and one of the
3227 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
3230 getgrgid_r_proto (d_getgrgid_r.U):
3231 This variable encodes the prototype of getgrgid_r.
3232 It is zero if d_getgrgid_r is undef, and one of the
3233 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
3236 getgrnam_r_proto (d_getgrnam_r.U):
3237 This variable encodes the prototype of getgrnam_r.
3238 It is zero if d_getgrnam_r is undef, and one of the
3239 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
3242 gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
3243 This variable encodes the prototype of gethostbyaddr_r.
3244 It is zero if d_gethostbyaddr_r is undef, and one of the
3245 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
3248 gethostbyname_r_proto (d_gethostbyname_r.U):
3249 This variable encodes the prototype of gethostbyname_r.
3250 It is zero if d_gethostbyname_r is undef, and one of the
3251 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
3254 gethostent_r_proto (d_gethostent_r.U):
3255 This variable encodes the prototype of gethostent_r.
3256 It is zero if d_gethostent_r is undef, and one of the
3257 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
3260 getlogin_r_proto (d_getlogin_r.U):
3261 This variable encodes the prototype of getlogin_r.
3262 It is zero if d_getlogin_r is undef, and one of the
3263 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
3266 getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
3267 This variable encodes the prototype of getnetbyaddr_r.
3268 It is zero if d_getnetbyaddr_r is undef, and one of the
3269 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
3272 getnetbyname_r_proto (d_getnetbyname_r.U):
3273 This variable encodes the prototype of getnetbyname_r.
3274 It is zero if d_getnetbyname_r is undef, and one of the
3275 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
3278 getnetent_r_proto (d_getnetent_r.U):
3279 This variable encodes the prototype of getnetent_r.
3280 It is zero if d_getnetent_r is undef, and one of the
3281 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
3284 getprotobyname_r_proto (d_getprotobyname_r.U):
3285 This variable encodes the prototype of getprotobyname_r.
3286 It is zero if d_getprotobyname_r is undef, and one of the
3287 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
3290 getprotobynumber_r_proto (d_getprotobynumber_r.U):
3291 This variable encodes the prototype of getprotobynumber_r.
3292 It is zero if d_getprotobynumber_r is undef, and one of the
3293 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
3296 getprotoent_r_proto (d_getprotoent_r.U):
3297 This variable encodes the prototype of getprotoent_r.
3298 It is zero if d_getprotoent_r is undef, and one of the
3299 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
3302 getpwent_r_proto (d_getpwent_r.U):
3303 This variable encodes the prototype of getpwent_r.
3304 It is zero if d_getpwent_r is undef, and one of the
3305 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
3308 getpwnam_r_proto (d_getpwnam_r.U):
3309 This variable encodes the prototype of getpwnam_r.
3310 It is zero if d_getpwnam_r is undef, and one of the
3311 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
3314 getpwuid_r_proto (d_getpwuid_r.U):
3315 This variable encodes the prototype of getpwuid_r.
3316 It is zero if d_getpwuid_r is undef, and one of the
3317 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
3320 getservbyname_r_proto (d_getservbyname_r.U):
3321 This variable encodes the prototype of getservbyname_r.
3322 It is zero if d_getservbyname_r is undef, and one of the
3323 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
3326 getservbyport_r_proto (d_getservbyport_r.U):
3327 This variable encodes the prototype of getservbyport_r.
3328 It is zero if d_getservbyport_r is undef, and one of the
3329 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
3332 getservent_r_proto (d_getservent_r.U):
3333 This variable encodes the prototype of getservent_r.
3334 It is zero if d_getservent_r is undef, and one of the
3335 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
3338 getspnam_r_proto (d_getspnam_r.U):
3339 This variable encodes the prototype of getspnam_r.
3340 It is zero if d_getspnam_r is undef, and one of the
3341 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
3345 This variable contains the format string used for printing a Gid_t.
3347 gidsign (gidsign.U):
3348 This variable contains the signedness of a gidtype.
3349 1 for unsigned, -1 for signed.
3351 gidsize (gidsize.U):
3352 This variable contains the size of a gidtype in bytes.
3354 gidtype (gidtype.U):
3355 This variable defines Gid_t to be something like gid_t, int,
3356 ushort, or whatever type is used to declare the return type
3357 of getgid(). Typically, it is the type of group ids in the kernel.
3360 This variable holds the general path (space-separated) used to
3361 find libraries. It may contain directories that do not exist on
3362 this platform, libpth is the cleaned-up version.
3365 This variable is used internally by Configure to determine the
3366 full pathname (if any) of the gmake program. After Configure runs,
3367 the value is reset to a plain "gmake" and is not useful.
3369 gmtime_r_proto (d_gmtime_r.U):
3370 This variable encodes the prototype of gmtime_r.
3371 It is zero if d_gmtime_r is undef, and one of the
3372 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
3375 gnulibc_version (d_gnulibc.U):
3376 This variable contains the version number of the GNU C library.
3377 It is usually something like '2.2.5'. It is a plain '' if this
3378 is not the GNU C library, or if the version is unknown.
3381 This variable is used internally by Configure to determine the
3382 full pathname (if any) of the grep program. After Configure runs,
3383 the value is reset to a plain "grep" and is not useful.
3386 This variable contains a command that produces the text of the
3387 /etc/group file. This is normally "cat /etc/group", but can be
3388 "ypcat group" when NIS is used.
3389 On some systems, such as os390, there may be no equivalent
3390 command, in which case this variable is unset.
3392 groupstype (groupstype.U):
3393 This variable defines Groups_t to be something like gid_t, int,
3394 ushort, or whatever type is used for the second argument to
3395 getgroups() and setgroups(). Usually, this is the same as
3396 gidtype (gid_t), but sometimes it isn't.
3399 This variable is used internally by Configure to determine the
3400 full pathname (if any) of the gzip program. After Configure runs,
3401 the value is reset to a plain "gzip" and is not useful.
3403 h_fcntl (h_fcntl.U):
3404 This is variable gets set in various places to tell i_fcntl that
3405 <fcntl.h> should be included.
3407 h_sysfile (h_sysfile.U):
3408 This is variable gets set in various places to tell i_sys_file that
3409 <sys/file.h> should be included.
3412 Gives the type of hints used for previous answers. May be one of
3413 "default", "recommended" or "previous".
3416 This variable contains a command that produces the text of the
3417 /etc/hosts file. This is normally "cat /etc/hosts", but can be
3418 "ypcat hosts" when NIS is used.
3419 On some systems, such as os390, there may be no equivalent
3420 command, in which case this variable is unset.
3422 hostgenerate (Cross.U):
3423 This variable contains the path to a generate_uudmap binary that
3424 can be run on the host OS when cross-compiling. Useful and
3425 available only during Perl build.
3426 Empty string '' if not cross-compiling.
3428 hostosname (Cross.U):
3429 This variable contains the original value of '$^O' for hostperl
3430 when cross-compiling. This is useful to pick the proper tools
3431 when running build code in the host.
3432 Empty string '' if not cross-compiling.
3435 This variable contains the path to a miniperl binary that can be
3436 run on the host OS when cross-compiling. Useful and available only
3438 Empty string '' if not cross-compiling.
3440 html1dir (html1dir.U):
3441 This variable contains the name of the directory in which html
3442 source pages are to be put. This directory is for pages
3443 that describe whole programs, not libraries or modules. It
3444 is intended to correspond roughly to section 1 of the Unix
3447 html1direxp (html1dir.U):
3448 This variable is the same as the html1dir variable, but is filename
3449 expanded at configuration time, for convenient use in makefiles.
3451 html3dir (html3dir.U):
3452 This variable contains the name of the directory in which html
3453 source pages are to be put. This directory is for pages
3454 that describe libraries or modules. It is intended to
3455 correspond roughly to section 3 of the Unix manuals.
3457 html3direxp (html3dir.U):
3458 This variable is the same as the html3dir variable, but is filename
3459 expanded at configuration time, for convenient use in makefiles.
3462 This variable is the size of an I16 in bytes.
3465 This variable contains the C type used for Perl's I16.
3468 This variable is the size of an I32 in bytes.
3471 This variable contains the C type used for Perl's I32.
3474 This variable is the size of an I64 in bytes.
3477 This variable contains the C type used for Perl's I64.
3480 This variable is the size of an I8 in bytes.
3483 This variable contains the C type used for Perl's I8.
3485 i_arpainet (i_arpainet.U):
3486 This variable conditionally defines the I_ARPA_INET symbol,
3487 and indicates whether a C program should include <arpa/inet.h>.
3490 This variable conditionally defines the I_BFD symbol, and
3491 indicates whether a C program can include <bfd.h>.
3493 i_bsdioctl (i_sysioctl.U):
3494 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
3495 indicates to the C program that <sys/bsdioctl.h> exists and should
3498 i_crypt (i_crypt.U):
3499 This variable conditionally defines the I_CRYPT symbol, and indicates
3500 whether a C program should include <crypt.h>.
3503 This variable conditionally defines the I_DB symbol, and indicates
3504 whether a C program may include Berkeley's DB include file <db.h>.
3507 This variable conditionally defines the I_DBM symbol, which
3508 indicates to the C program that <dbm.h> exists and should
3511 i_dirent (i_dirent.U):
3512 This variable conditionally defines I_DIRENT, which indicates
3513 to the C program that it should include <dirent.h>.
3515 i_dlfcn (i_dlfcn.U):
3516 This variable conditionally defines the I_DLFCN symbol, which
3517 indicates to the C program that <dlfcn.h> exists and should
3520 i_execinfo (i_execinfo.U):
3521 This variable conditionally defines the I_EXECINFO symbol, and indicates
3522 whether a C program may include <execinfo.h>, for backtrace() support.
3524 i_fcntl (i_fcntl.U):
3525 This variable controls the value of I_FCNTL (which tells
3526 the C program to include <fcntl.h>).
3529 This variable conditionally defines the I_FENV symbol, which
3530 indicates to the C program that <fenv.h> exists and should
3534 This variable conditionally defines the I_FP symbol, and indicates
3535 whether a C program should include <fp.h>.
3537 i_fp_class (i_fp_class.U):
3538 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3539 whether a C program should include <fp_class.h>.
3542 This variable conditionally defines the I_GDBM symbol, which
3543 indicates to the C program that <gdbm.h> exists and should
3546 i_gdbm_ndbm (i_ndbm.U):
3547 This variable conditionally defines the I_GDBM_NDBM symbol, which
3548 indicates to the C program that <gdbm-ndbm.h> exists and should
3549 be included. This is the location of the ndbm.h compatibility file
3552 i_gdbmndbm (i_ndbm.U):
3553 This variable conditionally defines the I_GDBMNDBM symbol, which
3554 indicates to the C program that <gdbm/ndbm.h> exists and should
3555 be included. This was the location of the ndbm.h compatibility file
3559 This variable conditionally defines the I_GRP symbol, and indicates
3560 whether a C program should include <grp.h>.
3562 i_ieeefp (i_ieeefp.U):
3563 This variable conditionally defines the I_IEEEFP symbol, and indicates
3564 whether a C program should include <ieeefp.h>.
3566 i_inttypes (i_inttypes.U):
3567 This variable conditionally defines the I_INTTYPES symbol,
3568 and indicates whether a C program should include <inttypes.h>.
3570 i_langinfo (i_langinfo.U):
3571 This variable conditionally defines the I_LANGINFO symbol,
3572 and indicates whether a C program should include <langinfo.h>.
3574 i_libutil (i_libutil.U):
3575 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3576 whether a C program should include <libutil.h>.
3578 i_locale (i_locale.U):
3579 This variable conditionally defines the I_LOCALE symbol,
3580 and indicates whether a C program should include <locale.h>.
3582 i_machcthr (i_machcthr.U):
3583 This variable conditionally defines the I_MACH_CTHREADS symbol,
3584 and indicates whether a C program should include <mach/cthreads.h>.
3586 i_malloc (i_malloc.U):
3587 This variable conditionally defines the I_MALLOC symbol, and indicates
3588 whether a C program should include <malloc.h>.
3590 i_mallocmalloc (i_mallocmalloc.U):
3591 This variable conditionally defines the I_MALLOCMALLOC symbol,
3592 and indicates whether a C program should include <malloc/malloc.h>.
3594 i_mntent (i_mntent.U):
3595 This variable conditionally defines the I_MNTENT symbol, and indicates
3596 whether a C program should include <mntent.h>.
3599 This variable conditionally defines the I_NDBM symbol, which
3600 indicates to the C program that <ndbm.h> exists and should
3603 i_netdb (i_netdb.U):
3604 This variable conditionally defines the I_NETDB symbol, and indicates
3605 whether a C program should include <netdb.h>.
3607 i_neterrno (i_neterrno.U):
3608 This variable conditionally defines the I_NET_ERRNO symbol, which
3609 indicates to the C program that <net/errno.h> exists and should
3612 i_netinettcp (i_netinettcp.U):
3613 This variable conditionally defines the I_NETINET_TCP symbol,
3614 and indicates whether a C program should include <netinet/tcp.h>.
3617 This variable conditionally defines I_NETINET_IN, which indicates
3618 to the C program that it should include <netinet/in.h>. Otherwise,
3619 you may try <sys/in.h>.
3622 This variable conditionally defines the I_POLL symbol, and indicates
3623 whether a C program should include <poll.h>.
3626 This variable conditionally defines the I_PROT symbol, and indicates
3627 whether a C program should include <prot.h>.
3629 i_pthread (i_pthread.U):
3630 This variable conditionally defines the I_PTHREAD symbol,
3631 and indicates whether a C program should include <pthread.h>.
3634 This variable conditionally defines I_PWD, which indicates
3635 to the C program that it should include <pwd.h>.
3637 i_quadmath (i_quadmath.U):
3638 This variable conditionally defines I_QUADMATH, which indicates
3639 to the C program that it should include <quadmath.h>.
3641 i_rpcsvcdbm (i_dbm.U):
3642 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3643 indicates to the C program that <rpcsvc/dbm.h> exists and should
3644 be included. Some System V systems might need this instead of <dbm.h>.
3646 i_sgtty (i_termio.U):
3647 This variable conditionally defines the I_SGTTY symbol, which
3648 indicates to the C program that it should include <sgtty.h> rather
3651 i_shadow (i_shadow.U):
3652 This variable conditionally defines the I_SHADOW symbol, and indicates
3653 whether a C program should include <shadow.h>.
3655 i_socks (i_socks.U):
3656 This variable conditionally defines the I_SOCKS symbol, and indicates
3657 whether a C program should include <socks.h>.
3659 i_stdbool (i_stdbool.U):
3660 This variable conditionally defines the I_STDBOOL symbol, which
3661 indicates to the C program that <stdbool.h> exists and should
3664 i_stdint (i_stdint.U):
3665 This variable conditionally defines the I_STDINT symbol, which
3666 indicates to the C program that <stdint.h> exists and should
3669 i_stdlib (i_stdlib.U):
3670 This variable unconditionally defines the I_STDLIB symbol.
3672 i_sunmath (i_sunmath.U):
3673 This variable conditionally defines the I_SUNMATH symbol, and indicates
3674 whether a C program should include <sunmath.h>.
3676 i_sysaccess (i_sysaccess.U):
3677 This variable conditionally defines the I_SYS_ACCESS symbol,
3678 and indicates whether a C program should include <sys/access.h>.
3680 i_sysdir (i_sysdir.U):
3681 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3682 whether a C program should include <sys/dir.h>.
3684 i_sysfile (i_sysfile.U):
3685 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3686 whether a C program should include <sys/file.h> to get R_OK and friends.
3688 i_sysfilio (i_sysioctl.U):
3689 This variable conditionally defines the I_SYS_FILIO symbol, which
3690 indicates to the C program that <sys/filio.h> exists and should
3691 be included in preference to <sys/ioctl.h>.
3694 This variable conditionally defines I_SYS_IN, which indicates
3695 to the C program that it should include <sys/in.h> instead of
3698 i_sysioctl (i_sysioctl.U):
3699 This variable conditionally defines the I_SYS_IOCTL symbol, which
3700 indicates to the C program that <sys/ioctl.h> exists and should
3703 i_syslog (i_syslog.U):
3704 This variable conditionally defines the I_SYSLOG symbol,
3705 and indicates whether a C program should include <syslog.h>.
3707 i_sysmman (i_sysmman.U):
3708 This variable conditionally defines the I_SYS_MMAN symbol,
3709 and indicates whether a C program should include <sys/mman.h>.
3711 i_sysmode (i_sysmode.U):
3712 This variable conditionally defines the I_SYSMODE symbol,
3713 and indicates whether a C program should include <sys/mode.h>.
3715 i_sysmount (i_sysmount.U):
3716 This variable conditionally defines the I_SYSMOUNT symbol,
3717 and indicates whether a C program should include <sys/mount.h>.
3719 i_sysndir (i_sysndir.U):
3720 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3721 whether a C program should include <sys/ndir.h>.
3723 i_sysparam (i_sysparam.U):
3724 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3725 whether a C program should include <sys/param.h>.
3727 i_syspoll (i_syspoll.U):
3728 This variable conditionally defines the I_SYS_POLL symbol, which
3729 indicates to the C program that it should include <sys/poll.h>.
3731 i_sysresrc (i_sysresrc.U):
3732 This variable conditionally defines the I_SYS_RESOURCE symbol,
3733 and indicates whether a C program should include <sys/resource.h>.
3735 i_syssecrt (i_syssecrt.U):
3736 This variable conditionally defines the I_SYS_SECURITY symbol,
3737 and indicates whether a C program should include <sys/security.h>.
3739 i_sysselct (i_sysselct.U):
3740 This variable conditionally defines I_SYS_SELECT, which indicates
3741 to the C program that it should include <sys/select.h> in order to
3742 get the definition of struct timeval.
3744 i_syssockio (i_sysioctl.U):
3745 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3746 C program that socket ioctl codes may be found in <sys/sockio.h>
3747 instead of <sys/ioctl.h>.
3749 i_sysstat (i_sysstat.U):
3750 This variable conditionally defines the I_SYS_STAT symbol,
3751 and indicates whether a C program should include <sys/stat.h>.
3753 i_sysstatfs (i_sysstatfs.U):
3754 This variable conditionally defines the I_SYSSTATFS symbol,
3755 and indicates whether a C program should include <sys/statfs.h>.
3757 i_sysstatvfs (i_sysstatvfs.U):
3758 This variable conditionally defines the I_SYSSTATVFS symbol,
3759 and indicates whether a C program should include <sys/statvfs.h>.
3761 i_systime (i_time.U):
3762 This variable conditionally defines I_SYS_TIME, which indicates
3763 to the C program that it should include <sys/time.h>.
3765 i_systimek (i_time.U):
3766 This variable conditionally defines I_SYS_TIME_KERNEL, which
3767 indicates to the C program that it should include <sys/time.h>
3768 with KERNEL defined.
3770 i_systimes (i_systimes.U):
3771 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3772 whether a C program should include <sys/times.h>.
3774 i_systypes (i_systypes.U):
3775 This variable conditionally defines the I_SYS_TYPES symbol,
3776 and indicates whether a C program should include <sys/types.h>.
3778 i_sysuio (i_sysuio.U):
3779 This variable conditionally defines the I_SYSUIO symbol, and indicates
3780 whether a C program should include <sys/uio.h>.
3782 i_sysun (i_sysun.U):
3783 This variable conditionally defines I_SYS_UN, which indicates
3784 to the C program that it should include <sys/un.h> to get UNIX
3785 domain socket definitions.
3787 i_sysutsname (i_sysutsname.U):
3788 This variable conditionally defines the I_SYSUTSNAME symbol,
3789 and indicates whether a C program should include <sys/utsname.h>.
3791 i_sysvfs (i_sysvfs.U):
3792 This variable conditionally defines the I_SYSVFS symbol,
3793 and indicates whether a C program should include <sys/vfs.h>.
3795 i_syswait (i_syswait.U):
3796 This variable conditionally defines I_SYS_WAIT, which indicates
3797 to the C program that it should include <sys/wait.h>.
3799 i_termio (i_termio.U):
3800 This variable conditionally defines the I_TERMIO symbol, which
3801 indicates to the C program that it should include <termio.h> rather
3804 i_termios (i_termio.U):
3805 This variable conditionally defines the I_TERMIOS symbol, which
3806 indicates to the C program that the POSIX <termios.h> file is
3810 This variable unconditionally defines I_TIME, which indicates
3811 to the C program that it should include <time.h>.
3813 i_unistd (i_unistd.U):
3814 This variable conditionally defines the I_UNISTD symbol, and indicates
3815 whether a C program should include <unistd.h>.
3817 i_ustat (i_ustat.U):
3818 This variable conditionally defines the I_USTAT symbol, and indicates
3819 whether a C program should include <ustat.h>.
3821 i_utime (i_utime.U):
3822 This variable conditionally defines the I_UTIME symbol, and indicates
3823 whether a C program should include <utime.h>.
3825 i_vfork (i_vfork.U):
3826 This variable conditionally defines the I_VFORK symbol, and indicates
3827 whether a C program should include vfork.h.
3829 i_wchar (i_wchar.U):
3830 This variable conditionally defines the I_WCHAR symbol,
3831 that indicates whether a C program may include <wchar.h>.
3833 i_wctype (i_wctype.U):
3834 This variable conditionally defines the I_WCTYPE symbol,
3835 that indicates whether a C program may include <wctype.h>.
3837 i_xlocale (d_newlocale.U):
3838 This symbol, if defined, indicates to the C program that it should
3839 include <xlocale.h> to get uselocale() and its friends
3841 ignore_versioned_solibs (libs.U):
3842 This variable should be non-empty if non-versioned shared
3843 libraries (libfoo.so.x.y) are to be ignored (because they
3844 cannot be linked against).
3846 inc_version_list (inc_version_list.U):
3847 This variable specifies the list of subdirectories in over
3848 which perl.c:incpush() and lib/lib.pm will automatically
3849 search when adding directories to @INC. The elements in
3850 the list are separated by spaces. This is only useful
3851 if you have a perl library directory tree structured like the
3852 default one. See INSTALL for how this works. The versioned
3853 site_perl directory was introduced in 5.005, so that is the
3854 lowest possible value.
3856 This list includes architecture-dependent directories back to
3857 version $api_versionstring (e.g. 5.5.640) and
3858 architecture-independent directories all the way back to
3861 inc_version_list_init (inc_version_list.U):
3862 This variable holds the same list as inc_version_list, but
3863 each item is enclosed in double quotes and separated by commas,
3864 suitable for use in the PERL_INC_VERSION_LIST initialization.
3867 This variable must precede the normal include path to get the
3868 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3869 Value can be "" or "/bsd43" on mips.
3872 This variable must precede the normal include path to get the
3873 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3874 Value can be "" or "/bsd43" on mips.
3877 This variable is defined but not used by Configure.
3878 The value is the empty string and is not useful.
3880 initialinstalllocation (bin.U):
3881 When userelocatableinc is true, this variable holds the location
3882 that make install should copy the perl binary to, with all the
3883 run-time relocatable paths calculated from this at install time.
3884 When used, it is initialized to the original value of binexp, and
3885 then binexp is set to '.../', as the other binaries are found
3886 relative to the perl binary.
3888 installarchlib (archlib.U):
3889 This variable is really the same as archlibexp but may differ on
3890 those systems using AFS. For extra portability, only this variable
3891 should be used in makefiles.
3894 This variable is the same as binexp unless AFS is running in which case
3895 the user is explicitly prompted for it. This variable should always
3896 be used in your makefiles for maximum portability.
3898 installhtml1dir (html1dir.U):
3899 This variable is really the same as html1direxp, unless you are
3900 using a different installprefix. For extra portability, you
3901 should only use this variable within your makefiles.
3903 installhtml3dir (html3dir.U):
3904 This variable is really the same as html3direxp, unless you are
3905 using a different installprefix. For extra portability, you
3906 should only use this variable within your makefiles.
3908 installman1dir (man1dir.U):
3909 This variable is really the same as man1direxp, unless you are using
3910 AFS in which case it points to the read/write location whereas
3911 man1direxp only points to the read-only access location. For extra
3912 portability, you should only use this variable within your makefiles.
3914 installman3dir (man3dir.U):
3915 This variable is really the same as man3direxp, unless you are using
3916 AFS in which case it points to the read/write location whereas
3917 man3direxp only points to the read-only access location. For extra
3918 portability, you should only use this variable within your makefiles.
3920 installprefix (installprefix.U):
3921 This variable holds the name of the directory below which
3922 "make install" will install the package. For most users, this
3923 is the same as prefix. However, it is useful for
3924 installing the software into a different (usually temporary)
3925 location after which it can be bundled up and moved somehow
3926 to the final location specified by prefix.
3928 installprefixexp (installprefix.U):
3929 This variable holds the full absolute path of installprefix
3930 with all ~-expansion done.
3932 installprivlib (privlib.U):
3933 This variable is really the same as privlibexp but may differ on
3934 those systems using AFS. For extra portability, only this variable
3935 should be used in makefiles.
3937 installscript (scriptdir.U):
3938 This variable is usually the same as scriptdirexp, unless you are on
3939 a system running AFS, in which case they may differ slightly. You
3940 should always use this variable within your makefiles for portability.
3942 installsitearch (sitearch.U):
3943 This variable is really the same as sitearchexp but may differ on
3944 those systems using AFS. For extra portability, only this variable
3945 should be used in makefiles.
3947 installsitebin (sitebin.U):
3948 This variable is usually the same as sitebinexp, unless you are on
3949 a system running AFS, in which case they may differ slightly. You
3950 should always use this variable within your makefiles for portability.
3952 installsitehtml1dir (sitehtml1dir.U):
3953 This variable is really the same as sitehtml1direxp, unless you are using
3954 AFS in which case it points to the read/write location whereas
3955 html1direxp only points to the read-only access location. For extra
3956 portability, you should only use this variable within your makefiles.
3958 installsitehtml3dir (sitehtml3dir.U):
3959 This variable is really the same as sitehtml3direxp, unless you are using
3960 AFS in which case it points to the read/write location whereas
3961 html3direxp only points to the read-only access location. For extra
3962 portability, you should only use this variable within your makefiles.
3964 installsitelib (sitelib.U):
3965 This variable is really the same as sitelibexp but may differ on
3966 those systems using AFS. For extra portability, only this variable
3967 should be used in makefiles.
3969 installsiteman1dir (siteman1dir.U):
3970 This variable is really the same as siteman1direxp, unless you are using
3971 AFS in which case it points to the read/write location whereas
3972 man1direxp only points to the read-only access location. For extra
3973 portability, you should only use this variable within your makefiles.
3975 installsiteman3dir (siteman3dir.U):
3976 This variable is really the same as siteman3direxp, unless you are using
3977 AFS in which case it points to the read/write location whereas
3978 man3direxp only points to the read-only access location. For extra
3979 portability, you should only use this variable within your makefiles.
3981 installsitescript (sitescript.U):
3982 This variable is usually the same as sitescriptexp, unless you are on
3983 a system running AFS, in which case they may differ slightly. You
3984 should always use this variable within your makefiles for portability.
3986 installstyle (installstyle.U):
3987 This variable describes the "style" of the perl installation.
3988 This is intended to be useful for tools that need to
3989 manipulate entire perl distributions. Perl itself doesn't use
3990 this to find its libraries -- the library directories are
3991 stored directly in Config.pm. Currently, there are only two
3992 styles: "lib" and "lib/perl5". The default library locations
3993 (e.g. privlib, sitelib) are either $prefix/lib or
3994 $prefix/lib/perl5. The former is useful if $prefix is a
3995 directory dedicated to perl (e.g. /opt/perl), while the latter
3996 is useful if $prefix is shared by many packages, e.g. if
3999 Unfortunately, while this "style" variable is used to set
4000 defaults for all three directory hierarchies (core, vendor, and
4001 site), there is no guarantee that the same style is actually
4002 appropriate for all those directories. For example, $prefix
4003 might be /opt/perl, but $siteprefix might be /usr/local.
4004 (Perhaps, in retrospect, the "lib" style should never have been
4005 supported, but it did seem like a nice idea at the time.)
4007 The situation is even less clear for tools such as MakeMaker
4008 that can be used to install additional modules into
4009 non-standard places. For example, if a user intends to install
4010 a module into a private directory (perhaps by setting PREFIX on
4011 the Makefile.PL command line), then there is no reason to
4012 assume that the Configure-time $installstyle setting will be
4013 relevant for that PREFIX.
4015 This may later be extended to include other information, so
4016 be careful with pattern-matching on the results.
4018 For compatibility with perl5.005 and earlier, the default
4019 setting is based on whether or not $prefix contains the string
4022 installusrbinperl (instubperl.U):
4023 This variable tells whether Perl should be installed also as
4024 /usr/bin/perl in addition to
4027 installvendorarch (vendorarch.U):
4028 This variable is really the same as vendorarchexp but may differ on
4029 those systems using AFS. For extra portability, only this variable
4030 should be used in makefiles.
4032 installvendorbin (vendorbin.U):
4033 This variable is really the same as vendorbinexp but may differ on
4034 those systems using AFS. For extra portability, only this variable
4035 should be used in makefiles.
4037 installvendorhtml1dir (vendorhtml1dir.U):
4038 This variable is really the same as vendorhtml1direxp but may differ on
4039 those systems using AFS. For extra portability, only this variable
4040 should be used in makefiles.
4042 installvendorhtml3dir (vendorhtml3dir.U):
4043 This variable is really the same as vendorhtml3direxp but may differ on
4044 those systems using AFS. For extra portability, only this variable
4045 should be used in makefiles.
4047 installvendorlib (vendorlib.U):
4048 This variable is really the same as vendorlibexp but may differ on
4049 those systems using AFS. For extra portability, only this variable
4050 should be used in makefiles.
4052 installvendorman1dir (vendorman1dir.U):
4053 This variable is really the same as vendorman1direxp but may differ on
4054 those systems using AFS. For extra portability, only this variable
4055 should be used in makefiles.
4057 installvendorman3dir (vendorman3dir.U):
4058 This variable is really the same as vendorman3direxp but may differ on
4059 those systems using AFS. For extra portability, only this variable
4060 should be used in makefiles.
4062 installvendorscript (vendorscript.U):
4063 This variable is really the same as vendorscriptexp but may differ on
4064 those systems using AFS. For extra portability, only this variable
4065 should be used in makefiles.
4067 intsize (intsize.U):
4068 This variable contains the value of the INTSIZE symbol, which
4069 indicates to the C program how many bytes there are in an int.
4071 issymlink (issymlink.U):
4072 This variable holds the test command to test for a symbolic link
4073 (if they are supported). Typical values include 'test -h' and
4076 ivdformat (perlxvf.U):
4077 This variable contains the format string used for printing
4078 a Perl IV as a signed decimal integer.
4081 This variable is the size of an IV in bytes.
4084 This variable contains the C type used for Perl's IV.
4086 known_extensions (Extensions.U):
4087 This variable holds a list of all extensions (both XS and non-xs)
4088 included in the package source distribution. This information is
4089 only really of use during the Perl build, as the list makes no
4090 distinction between extensions which were build and installed, and
4091 those which where not. See "extensions" for the list of extensions
4092 actually built and available.
4095 This variable is defined but not used by Configure.
4096 The value is the empty string and is not useful.
4099 This variable indicates the program to be used to link
4100 libraries for dynamic loading. On some systems, it is 'ld'.
4101 On ELF systems, it should be $cc. Mostly, we'll try to respect
4102 the hint file setting.
4104 ld_can_script (dlsrc.U):
4105 This variable shows if the loader accepts scripts in the form of
4106 -Wl,--version-script=ld.script. This is currently only supported
4107 for GNU ld on ELF in dynamic loading builds.
4109 lddlflags (dlsrc.U):
4110 This variable contains any special flags that might need to be
4111 passed to $ld to create a shared library suitable for dynamic
4112 loading. It is up to the makefile to use it. For hpux, it
4113 should be '-b'. For sunos 4.1, it is empty.
4115 ldflags (ccflags.U):
4116 This variable contains any additional C loader flags desired by
4117 the user. It is up to the Makefile to use this.
4119 ldflags_uselargefiles (uselfs.U):
4120 This variable contains the loader flags needed by large file builds
4121 and added to ldflags by hints files.
4123 ldlibpthname (libperl.U):
4124 This variable holds the name of the shared library
4125 search path, often LD_LIBRARY_PATH. To get an empty
4126 string, the hints file must set this to 'none'.
4129 This variable is used internally by Configure to determine the
4130 full pathname (if any) of the less program. After Configure runs,
4131 the value is reset to a plain "less" and is not useful.
4134 This is an old synonym for _a.
4137 This variable contains the location of the C library.
4139 libperl (libperl.U):
4140 The perl executable is obtained by linking perlmain.c with
4141 libperl, any static extensions (usually just DynaLoader),
4142 and any other libraries needed on this system. libperl
4143 is usually libperl.a, but can also be libperl.so.xxx if
4144 the user wishes to build a perl executable with a shared
4148 This variable holds the general path (space-separated) used to find
4149 libraries. It is intended to be used by other units.
4152 This variable holds the additional libraries we want to use.
4153 It is up to the Makefile to deal with it. The list can be empty.
4156 This variable holds the directory names aka dirnames of the libraries
4157 we found and accepted, duplicates are removed.
4160 This variable holds the filenames aka basenames of the libraries
4161 we found and accepted.
4164 This variable holds the full pathnames of the libraries
4165 we found and accepted.
4168 This variable holds the directory names probed for libraries.
4170 libswanted (Myinit.U):
4171 This variable holds a list of all the libraries we want to
4172 search. The order is chosen to pick up the c library
4173 ahead of ucb or bsd libraries for SVR4.
4175 libswanted_uselargefiles (uselfs.U):
4176 This variable contains the libraries needed by large file builds
4177 and added to ldflags by hints files. It is a space separated list
4178 of the library names without the "lib" prefix or any suffix, just
4182 This variable is defined but not used by Configure.
4183 The value is the empty string and is not useful.
4186 This variable is defined but not used by Configure.
4187 The value is the empty string and is not useful.
4189 lkflags (ccflags.U):
4190 This variable contains any additional C partial linker flags desired by
4191 the user. It is up to the Makefile to use this.
4194 This variable is used internally by Configure to determine the
4195 full pathname (if any) of the ln program. After Configure runs,
4196 the value is reset to a plain "ln" and is not useful.
4199 This variable holds the name of the command to make
4200 symbolic links (if they are supported). It can be used
4201 in the Makefile. It is either 'ln -s' or 'ln'
4203 localtime_r_proto (d_localtime_r.U):
4204 This variable encodes the prototype of localtime_r.
4205 It is zero if d_localtime_r is undef, and one of the
4206 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
4209 locincpth (ccflags.U):
4210 This variable contains a list of additional directories to be
4211 searched by the compiler. The appropriate '-I' directives will
4212 be added to ccflags. This is intended to simplify setting
4213 local directories from the Configure command line.
4214 It's not much, but it parallels the loclibpth stuff in libpth.U.
4216 loclibpth (libpth.U):
4217 This variable holds the paths (space-separated) used to find local
4218 libraries. It is prepended to libpth, and is intended to be easily
4219 set from the command line.
4221 longdblinfbytes (infnan.U):
4222 This variable contains comma-separated list of hexadecimal bytes
4223 for the long double precision infinity.
4225 longdblkind (d_longdbl.U):
4226 This variable, if defined, encodes the type of a long double:
4228 1 = IEEE 754 128-bit little endian,
4229 2 = IEEE 754 128-bit big endian,
4230 3 = x86 80-bit little endian,
4231 4 = x86 80-bit big endian,
4232 5 = double-double 128-bit little endian,
4233 6 = double-double 128-bit big endian,
4234 7 = 128-bit mixed-endian double-double (64-bit LEs in BE),
4235 8 = 128-bit mixed-endian double-double (64-bit BEs in LE),
4236 9 = 128-bit PDP-style mixed-endian long doubles,
4237 -1 = unknown format.
4239 longdblmantbits (mantbits.U):
4240 This symbol, if defined, tells how many mantissa bits
4241 there are in long double precision floating point format.
4242 Note that this can be LDBL_MANT_DIG minus one,
4243 since LDBL_MANT_DIG can include the IEEE 754 implicit bit.
4244 The common x86-style 80-bit long double does not have
4247 longdblnanbytes (infnan.U):
4248 This variable contains comma-separated list of hexadecimal bytes
4249 for the long double precision not-a-number.
4251 longdblsize (d_longdbl.U):
4252 This variable contains the value of the LONG_DOUBLESIZE symbol, which
4253 indicates to the C program how many bytes there are in a long double,
4254 if this system supports long doubles. Note that this is
4255 sizeof(long double), which may include unused bytes.
4257 longlongsize (d_longlong.U):
4258 This variable contains the value of the LONGLONGSIZE symbol, which
4259 indicates to the C program how many bytes there are in a long long,
4260 if this system supports long long.
4262 longsize (intsize.U):
4263 This variable contains the value of the LONGSIZE symbol, which
4264 indicates to the C program how many bytes there are in a long.
4267 This variable is defined but not used by Configure.
4268 The value is the empty string and is not useful.
4271 This variable is defined but not used by Configure.
4272 The value is the empty string and is not useful.
4275 This variable is used internally by Configure to determine the
4276 full pathname (if any) of the ls program. After Configure runs,
4277 the value is reset to a plain "ls" and is not useful.
4279 lseeksize (lseektype.U):
4280 This variable defines lseektype to be something like off_t, long,
4281 or whatever type is used to declare lseek offset's type in the
4282 kernel (which also appears to be lseek's return type).
4284 lseektype (lseektype.U):
4285 This variable defines lseektype to be something like off_t, long,
4286 or whatever type is used to declare lseek offset's type in the
4287 kernel (which also appears to be lseek's return type).
4290 This variable is defined but not used by Configure.
4291 The value is the empty string and is not useful.
4294 This variable is defined but not used by Configure.
4295 The value is the empty string and is not useful.
4298 This variable is used internally by Configure to determine the
4299 full pathname (if any) of the make program. After Configure runs,
4300 the value is reset to a plain "make" and is not useful.
4302 make_set_make (make.U):
4303 Some versions of 'make' set the variable MAKE. Others do not.
4304 This variable contains the string to be included in Makefile.SH
4305 so that MAKE is set if needed, and not if not needed.
4306 Possible values are:
4308 make_set_make='#' # If your make program handles this for you,
4310 make_set_make="MAKE=$make" # if it doesn't.
4312 This uses a comment character so that we can distinguish a
4313 'set' value (from a previous config.sh or Configure '-D' option)
4314 from an uncomputed value.
4316 mallocobj (mallocsrc.U):
4317 This variable contains the name of the malloc.o that this package
4318 generates, if that malloc.o is preferred over the system malloc.
4319 Otherwise the value is null. This variable is intended for generating
4320 Makefiles. See mallocsrc.
4322 mallocsrc (mallocsrc.U):
4323 This variable contains the name of the malloc.c that comes with
4324 the package, if that malloc.c is preferred over the system malloc.
4325 Otherwise the value is null. This variable is intended for generating
4328 malloctype (mallocsrc.U):
4329 This variable contains the kind of ptr returned by malloc and realloc.
4331 man1dir (man1dir.U):
4332 This variable contains the name of the directory in which manual
4333 source pages are to be put. It is the responsibility of the
4334 Makefile.SH to get the value of this into the proper command.
4335 You must be prepared to do the ~name expansion yourself.
4337 man1direxp (man1dir.U):
4338 This variable is the same as the man1dir variable, but is filename
4339 expanded at configuration time, for convenient use in makefiles.
4341 man1ext (man1dir.U):
4342 This variable contains the extension that the manual page should
4343 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
4346 man3dir (man3dir.U):
4347 This variable contains the name of the directory in which manual
4348 source pages are to be put. It is the responsibility of the
4349 Makefile.SH to get the value of this into the proper command.
4350 You must be prepared to do the ~name expansion yourself.
4352 man3direxp (man3dir.U):
4353 This variable is the same as the man3dir variable, but is filename
4354 expanded at configuration time, for convenient use in makefiles.
4356 man3ext (man3dir.U):
4357 This variable contains the extension that the manual page should
4358 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
4361 mips_type (usrinc.U):
4362 This variable holds the environment type for the mips system.
4363 Possible values are "BSD 4.3" and "System V".
4365 mistrustnm (Csym.U):
4366 This variable can be used to establish a fallthrough for the cases
4367 where nm fails to find a symbol. If usenm is false or usenm is true
4368 and mistrustnm is false, this variable has no effect. If usenm is true
4369 and mistrustnm is "compile", a test program will be compiled to try to
4370 find any symbol that can't be located via nm lookup. If mistrustnm is
4371 "run", the test program will be run as well as being compiled.
4374 This variable is used internally by Configure to determine the
4375 full pathname (if any) of the mkdir program. After Configure runs,
4376 the value is reset to a plain "mkdir" and is not useful.
4378 mmaptype (d_mmap.U):
4379 This symbol contains the type of pointer returned by mmap()
4380 (and simultaneously the type of the first argument).
4381 It can be 'void *' or 'caddr_t'.
4383 modetype (modetype.U):
4384 This variable defines modetype to be something like mode_t,
4385 int, unsigned short, or whatever type is used to declare file
4386 modes for system calls.
4389 This variable is used internally by Configure to determine the
4390 full pathname (if any) of the more program. After Configure runs,
4391 the value is reset to a plain "more" and is not useful.
4393 multiarch (multiarch.U):
4394 This variable conditionally defines the MULTIARCH symbol
4395 which signifies the presence of multiplatform files.
4396 This is normally set by hints files.
4399 This variable is defined but not used by Configure.
4400 The value is the empty string and is not useful.
4402 myarchname (archname.U):
4403 This variable holds the architecture name computed by Configure in
4404 a previous run. It is not intended to be perused by any user and
4405 should never be set in a hint file.
4407 mydomain (myhostname.U):
4408 This variable contains the eventual value of the MYDOMAIN symbol,
4409 which is the domain of the host the program is going to run on.
4410 The domain must be appended to myhostname to form a complete host name.
4411 The dot comes with mydomain, and need not be supplied by the program.
4413 myhostname (myhostname.U):
4414 This variable contains the eventual value of the MYHOSTNAME symbol,
4415 which is the name of the host the program is going to run on.
4416 The domain is not kept with hostname, but must be gotten from mydomain.
4417 The dot comes with mydomain, and need not be supplied by the program.
4419 myuname (Oldconfig.U):
4420 The output of 'uname -a' if available, otherwise the hostname.
4421 The whole thing is then lower-cased and slashes and single quotes are
4425 This variable contains the '-n' flag if that is what causes the echo
4426 command to suppress newline. Otherwise it is null. Correct usage is
4427 $echo $n "prompt for a question: $c".
4429 need_va_copy (need_va_copy.U):
4430 This symbol, if defined, indicates that the system stores
4431 the variable argument list datatype, va_list, in a format
4432 that cannot be copied by simple assignment, so that some
4433 other means must be used when copying is required.
4434 As such systems vary in their provision (or non-provision)
4435 of copying mechanisms, handy.h defines a platform-
4436 independent macro, Perl_va_copy(src, dst), to do the job.
4438 netdb_hlen_type (netdbtype.U):
4439 This variable holds the type used for the 2nd argument to
4440 gethostbyaddr(). Usually, this is int or size_t or unsigned.
4441 This is only useful if you have gethostbyaddr(), naturally.
4443 netdb_host_type (netdbtype.U):
4444 This variable holds the type used for the 1st argument to
4445 gethostbyaddr(). Usually, this is char * or void *, possibly
4446 with or without a const prefix.
4447 This is only useful if you have gethostbyaddr(), naturally.
4449 netdb_name_type (netdbtype.U):
4450 This variable holds the type used for the argument to
4451 gethostbyname(). Usually, this is char * or const char *.
4452 This is only useful if you have gethostbyname(), naturally.
4454 netdb_net_type (netdbtype.U):
4455 This variable holds the type used for the 1st argument to
4456 getnetbyaddr(). Usually, this is int or long.
4457 This is only useful if you have getnetbyaddr(), naturally.
4460 This variable is used internally by Configure to determine the
4461 full pathname (if any) of the nm program. After Configure runs,
4462 the value is reset to a plain "nm" and is not useful.
4465 This variable holds the options that may be necessary for nm.
4467 nm_so_opt (usenm.U):
4468 This variable holds the options that may be necessary for nm
4469 to work on a shared library but that can not be used on an
4470 archive library. Currently, this is only used by Linux, where
4471 nm --dynamic is *required* to get symbols from an ELF library which
4472 has been stripped, but nm --dynamic is *fatal* on an archive library.
4473 Maybe Linux should just always set usenm=false.
4475 nonxs_ext (Extensions.U):
4476 This variable holds a list of all non-xs extensions built and
4477 installed by the package. By default, all non-xs extensions
4478 distributed will be built, with the exception of platform-specific
4479 extensions (currently only one VMS specific extension).
4482 This variable is used internally by Configure to determine the
4483 full pathname (if any) of the nroff program. After Configure runs,
4484 the value is reset to a plain "nroff" and is not useful.
4486 nv_overflows_integers_at (perlxv.U):
4487 This variable gives the largest integer value that NVs can hold
4488 as a constant floating point expression.
4489 If it could not be determined, it holds the value 0.
4491 nv_preserves_uv_bits (perlxv.U):
4492 This variable indicates how many of bits type uvtype
4493 a variable nvtype can preserve.
4495 nveformat (perlxvf.U):
4496 This variable contains the format string used for printing
4497 a Perl NV using %e-ish floating point format.
4499 nvEUformat (perlxvf.U):
4500 This variable contains the format string used for printing
4501 a Perl NV using %E-ish floating point format.
4503 nvfformat (perlxvf.U):
4504 This variable contains the format string used for printing
4505 a Perl NV using %f-ish floating point format.
4507 nvFUformat (perlxvf.U):
4508 This variable contains the format string used for printing
4509 a Perl NV using %F-ish floating point format.
4511 nvgformat (perlxvf.U):
4512 This variable contains the format string used for printing
4513 a Perl NV using %g-ish floating point format.
4515 nvGUformat (perlxvf.U):
4516 This variable contains the format string used for printing
4517 a Perl NV using %G-ish floating point format.
4519 nvmantbits (mantbits.U):
4520 This variable tells how many bits the mantissa of a Perl NV has,
4521 not including the possible implicit bit.
4524 This variable is the size of a Perl NV in bytes.
4525 Note that some floating point formats have unused bytes.
4528 This variable contains the C type used for Perl's NV.
4530 o_nonblock (nblock_io.U):
4531 This variable bears the symbol value to be used during open() or fcntl()
4532 to turn on non-blocking I/O for a file descriptor. If you wish to switch
4533 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
4534 but that is only supported by some devices.
4537 This is an old synonym for _o.
4539 old_pthread_create_joinable (d_pthrattrj.U):
4540 This variable defines the constant to use for creating joinable
4541 (aka undetached) pthreads. Unused if pthread.h defines
4542 PTHREAD_CREATE_JOINABLE. If used, possible values are
4543 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
4545 optimize (ccflags.U):
4546 This variable contains any optimizer/debugger flag that should be used.
4547 It is up to the Makefile to use it.
4549 orderlib (orderlib.U):
4550 This variable is "true" if the components of libraries must be ordered
4551 (with `lorder $* | tsort`) before placing them in an archive. Set to
4552 "false" if ranlib or ar can generate random libraries.
4554 osname (Oldconfig.U):
4555 This variable contains the operating system name (e.g. sunos,
4556 solaris, hpux, etc.). It can be useful later on for setting
4557 defaults. Any spaces are replaced with underscores. It is set
4558 to a null string if we can't figure it out.
4560 osvers (Oldconfig.U):
4561 This variable contains the operating system version (e.g.
4562 4.1.3, 5.2, etc.). It is primarily used for helping select
4563 an appropriate hints file, but might be useful elsewhere for
4564 setting defaults. It is set to '' if we can't figure it out.
4565 We try to be flexible about how much of the version number
4566 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
4567 same for this package, hints files might just be os_4.0 or
4568 os_4.1, etc., not keeping separate files for each little release.
4570 otherlibdirs (otherlibdirs.U):
4571 This variable contains a colon-separated set of paths for the perl
4572 binary to search for additional library files or modules.
4573 These directories will be tacked to the end of @INC.
4574 Perl will automatically search below each path for version-
4575 and architecture-specific directories. See inc_version_list
4577 A value of ' ' means 'none' and is used to preserve this value
4578 for the next run through Configure.
4580 package (package.U):
4581 This variable contains the name of the package being constructed.
4582 It is primarily intended for the use of later Configure units.
4585 This variable contains the name of the preferred pager on the system.
4586 Usual values are (the full pathnames of) more, less, pg, or cat.
4589 This variable contains a command that produces the text of the
4590 /etc/passwd file. This is normally "cat /etc/passwd", but can be
4591 "ypcat passwd" when NIS is used.
4592 On some systems, such as os390, there may be no equivalent
4593 command, in which case this variable is unset.
4595 patchlevel (patchlevel.U):
4596 The patchlevel level of this package.
4597 The value of patchlevel comes from the patchlevel.h file.
4598 In a version number such as 5.6.1, this is the "6".
4599 In patchlevel.h, this is referred to as "PERL_VERSION".
4602 This is an old synonym for p_ in Head.U, the character
4603 used to separate elements in the command shell search PATH.
4606 This variable is used internally by Configure to determine the
4607 full pathname (if any) of the perl program. After Configure runs,
4608 the value is reset to a plain "perl" and is not useful.
4611 This variable contains the full path (if any) to a previously
4612 installed perl5.005 or later suitable for running the script
4613 to determine inc_version_list.
4615 PERL_API_REVISION (patchlevel.h):
4616 This number describes the earliest compatible PERL_REVISION of
4617 Perl ("compatibility" here being defined as sufficient binary/API
4618 compatibility to run XS code built with the older version).
4619 Normally this does not change across maintenance releases.
4620 Please read the comment in patchlevel.h.
4622 PERL_API_SUBVERSION (patchlevel.h):
4623 This number describes the earliest compatible PERL_SUBVERSION of
4624 Perl ("compatibility" here being defined as sufficient binary/API
4625 compatibility to run XS code built with the older version).
4626 Normally this does not change across maintenance releases.
4627 Please read the comment in patchlevel.h.
4629 PERL_API_VERSION (patchlevel.h):
4630 This number describes the earliest compatible PERL_VERSION of
4631 Perl ("compatibility" here being defined as sufficient binary/API
4632 compatibility to run XS code built with the older version).
4633 Normally this does not change across maintenance releases.
4634 Please read the comment in patchlevel.h.
4636 PERL_CONFIG_SH (Oldsyms.U):
4637 This is set to 'true' in config.sh so that a shell script
4638 sourcing config.sh can tell if it has been sourced already.
4640 PERL_PATCHLEVEL (Oldsyms.U):
4641 This symbol reflects the patchlevel, if available. Will usually
4642 come from the .patch file, which is available when the perl
4643 source tree was fetched with rsync.
4645 perl_patchlevel (patchlevel.U):
4646 This is the Perl patch level, a numeric change identifier,
4647 as defined by whichever source code maintenance system
4648 is used to maintain the patches; currently Perforce.
4649 It does not correlate with the Perl version numbers or
4650 the maintenance versus development dichotomy except
4651 by also being increasing.
4653 PERL_REVISION (Oldsyms.U):
4654 In a Perl version number such as 5.6.2, this is the 5.
4655 This value is manually set in patchlevel.h
4657 perl_static_inline (d_static_inline.U):
4658 This variable defines the PERL_STATIC_INLINE symbol to
4659 the best-guess incantation to use for static inline functions.
4660 Possibilities include
4662 static __inline__ (gcc -ansi)
4663 static __inline (MSVC)
4664 static _inline (older MSVC)
4665 static (c89 compilers)
4667 PERL_SUBVERSION (Oldsyms.U):
4668 In a Perl version number such as 5.6.2, this is the 2.
4669 Values greater than 50 represent potentially unstable
4670 development subversions.
4671 This value is manually set in patchlevel.h
4673 PERL_VERSION (Oldsyms.U):
4674 In a Perl version number such as 5.6.2, this is the 6.
4675 This value is manually set in patchlevel.h
4677 perladmin (perladmin.U):
4678 Electronic mail address of the perl5 administrator.
4681 The list of libraries needed by Perl only (any libraries needed
4682 by extensions only will by dropped, if using dynamic loading).
4684 perlpath (perlpath.U):
4685 This variable contains the eventual value of the PERLPATH symbol,
4686 which contains the name of the perl interpreter to be used in
4687 shell scripts and in the "eval 'exec'" idiom. This variable is
4688 not necessarily the pathname of the file containing the perl
4689 interpreter; you must append the executable extension (_exe) if
4690 it is not already present. Note that Perl code that runs during
4691 the Perl build process cannot reference this variable, as Perl
4692 may not have been installed, or even if installed, may be a
4693 different version of Perl.
4696 This variable is used internally by Configure to determine the
4697 full pathname (if any) of the pg program. After Configure runs,
4698 the value is reset to a plain "pg" and is not useful.
4700 phostname (myhostname.U):
4701 This variable contains the eventual value of the PHOSTNAME symbol,
4702 which is a command that can be fed to popen() to get the host name.
4703 The program should probably not presume that the domain is or isn't
4706 pidtype (pidtype.U):
4707 This variable defines PIDTYPE to be something like pid_t, int,
4708 ushort, or whatever type is used to declare process ids in the kernel.
4711 Holds the private path used by Configure to find out the libraries.
4712 Its value is prepend to libpth. This variable takes care of special
4713 machines, like the mips. Usually, it should be empty.
4716 This variable is defined but not used by Configure.
4717 The value is the empty string and is not useful.
4720 This variable is defined but not used by Configure.
4721 The value is the empty string and is not useful.
4724 This variable holds the name of the directory below which the
4725 user will install the package. Usually, this is /usr/local, and
4726 executables go in /usr/local/bin, library stuff in /usr/local/lib,
4727 man pages in /usr/local/man, etc. It is only used to set defaults
4728 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
4730 prefixexp (prefix.U):
4731 This variable holds the full absolute path of the directory below
4732 which the user will install the package. Derived from prefix.
4734 privlib (privlib.U):
4735 This variable contains the eventual value of the PRIVLIB symbol,
4736 which is the name of the private library for this package. It may
4737 have a ~ on the front. It is up to the makefile to eventually create
4738 this directory while performing installation (with ~ substitution).
4740 privlibexp (privlib.U):
4741 This variable is the ~name expanded version of privlib, so that you
4742 may use it directly in Makefiles or shell scripts.
4744 procselfexe (d_procselfexe.U):
4745 If d_procselfexe is defined, $procselfexe is the filename
4746 of the symbolic link pointing to the absolute pathname of
4747 the executing program.
4749 ptrsize (ptrsize.U):
4750 This variable contains the value of the PTRSIZE symbol, which
4751 indicates to the C program how many bytes there are in a pointer.
4753 quadkind (quadtype.U):
4754 This variable, if defined, encodes the type of a quad:
4755 1 = int, 2 = long, 3 = long long, 4 = int64_t.
4757 quadtype (quadtype.U):
4758 This variable defines Quad_t to be something like long, int,
4759 long long, int64_t, or whatever type is used for 64-bit integers.
4761 randbits (randfunc.U):
4762 Indicates how many bits are produced by the function used to
4763 generate normalized random numbers.
4765 randfunc (randfunc.U):
4766 Indicates the name of the random number function to use.
4767 Values include drand48, random, and rand. In C programs,
4768 the 'Drand01' macro is defined to generate uniformly distributed
4769 random numbers over the range [0., 1.[ (see drand01 and nrand).
4771 random_r_proto (d_random_r.U):
4772 This variable encodes the prototype of random_r.
4773 It is zero if d_random_r is undef, and one of the
4774 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
4777 randseedtype (randfunc.U):
4778 Indicates the type of the argument of the seedfunc.
4780 ranlib (orderlib.U):
4781 This variable is set to the pathname of the ranlib program, if it is
4782 needed to generate random libraries. Set to ":" if ar can generate
4783 random libraries or if random libraries are not supported
4785 rd_nodata (nblock_io.U):
4786 This variable holds the return code from read() when no data is
4787 present. It should be -1, but some systems return 0 when O_NDELAY is
4788 used, which is a shame because you cannot make the difference between
4789 no data and an EOF.. Sigh!
4791 readdir64_r_proto (d_readdir64_r.U):
4792 This variable encodes the prototype of readdir64_r.
4793 It is zero if d_readdir64_r is undef, and one of the
4794 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
4797 readdir_r_proto (d_readdir_r.U):
4798 This variable encodes the prototype of readdir_r.
4799 It is zero if d_readdir_r is undef, and one of the
4800 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
4803 revision (patchlevel.U):
4804 The value of revision comes from the patchlevel.h file.
4805 In a version number such as 5.6.1, this is the "5".
4806 In patchlevel.h, this is referred to as "PERL_REVISION".
4809 This variable is used internally by Configure to determine the
4810 full pathname (if any) of the rm program. After Configure runs,
4811 the value is reset to a plain "rm" and is not useful.
4814 This is a cleanup variable for try test programs.
4815 Internal Configure use only.
4818 This variable is defined but not used by Configure.
4819 The value is the empty string and is not useful.
4822 This variable contains the command used by Configure
4823 to copy and execute a cross-compiled executable in the
4824 target host. Useful and available only during Perl build.
4825 Empty string '' if not cross-compiling.
4828 This variable contains 'true' or 'false' depending whether the
4829 nm extraction should be performed or not, according to the value
4830 of usenm and the flags on the Configure command line.
4832 sched_yield (d_pthread_y.U):
4833 This variable defines the way to yield the execution
4834 of the current thread.
4836 scriptdir (scriptdir.U):
4837 This variable holds the name of the directory in which the user wants
4838 to put publicly scripts for the package in question. It is either
4839 the same directory as for binaries, or a special one that can be
4840 mounted across different architectures, like /usr/share. Programs
4841 must be prepared to deal with ~name expansion.
4843 scriptdirexp (scriptdir.U):
4844 This variable is the same as scriptdir, but is filename expanded
4845 at configuration time, for programs not wanting to bother with it.
4848 This variable is used internally by Configure to determine the
4849 full pathname (if any) of the sed program. After Configure runs,
4850 the value is reset to a plain "sed" and is not useful.
4852 seedfunc (randfunc.U):
4853 Indicates the random number generating seed function.
4854 Values include srand48, srandom, and srand.
4856 selectminbits (selectminbits.U):
4857 This variable holds the minimum number of bits operated by select.
4858 That is, if you do select(n, ...), how many bits at least will be
4859 cleared in the masks if some activity is detected. Usually this
4860 is either n or 32*ceil(n/32), especially many little-endians do
4861 the latter. This is only useful if you have select(), naturally.
4863 selecttype (selecttype.U):
4864 This variable holds the type used for the 2nd, 3rd, and 4th
4865 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
4866 is defined, and 'int *' otherwise. This is only useful if you
4867 have select(), naturally.
4870 This variable is defined but not used by Configure.
4871 The value is the empty string and is not useful.
4873 setgrent_r_proto (d_setgrent_r.U):
4874 This variable encodes the prototype of setgrent_r.
4875 It is zero if d_setgrent_r is undef, and one of the
4876 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r
4879 sethostent_r_proto (d_sethostent_r.U):
4880 This variable encodes the prototype of sethostent_r.
4881 It is zero if d_sethostent_r is undef, and one of the
4882 REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r
4885 setlocale_r_proto (d_setlocale_r.U):
4886 This variable encodes the prototype of setlocale_r.
4887 It is zero if d_setlocale_r is undef, and one of the
4888 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r
4891 setnetent_r_proto (d_setnetent_r.U):
4892 This variable encodes the prototype of setnetent_r.
4893 It is zero if d_setnetent_r is undef, and one of the
4894 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r
4897 setprotoent_r_proto (d_setprotoent_r.U):
4898 This variable encodes the prototype of setprotoent_r.
4899 It is zero if d_setprotoent_r is undef, and one of the
4900 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r
4903 setpwent_r_proto (d_setpwent_r.U):
4904 This variable encodes the prototype of setpwent_r.
4905 It is zero if d_setpwent_r is undef, and one of the
4906 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r
4909 setservent_r_proto (d_setservent_r.U):
4910 This variable encodes the prototype of setservent_r.
4911 It is zero if d_setservent_r is undef, and one of the
4912 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r
4915 sGMTIME_max (time_size.U):
4916 This variable defines the maximum value of the time_t offset that
4917 the system function gmtime () accepts
4919 sGMTIME_min (time_size.U):
4920 This variable defines the minimum value of the time_t offset that
4921 the system function gmtime () accepts
4924 This variable contains the full pathname of the shell used
4925 on this system to execute Bourne shell scripts. Usually, this will be
4926 /bin/sh, though it's possible that some systems will have /bin/ksh,
4927 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
4929 This unit comes before Options.U, so you can't set sh with a '-D'
4930 option, though you can override this (and startsh)
4931 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
4934 This variable is defined but not used by Configure.
4935 The value is the empty string and is not useful.
4937 sharpbang (spitshell.U):
4938 This variable contains the string #! if this system supports that
4941 shmattype (d_shmat.U):
4942 This symbol contains the type of pointer returned by shmat().
4943 It can be 'void *' or 'char *'.
4945 shortsize (intsize.U):
4946 This variable contains the value of the SHORTSIZE symbol which
4947 indicates to the C program how many bytes there are in a short.
4949 shrpenv (libperl.U):
4950 If the user builds a shared libperl.so, then we need to tell the
4951 'perl' executable where it will be able to find the installed libperl.so.
4952 One way to do this on some systems is to set the environment variable
4953 LD_RUN_PATH to the directory that will be the final location of the
4954 shared libperl.so. The makefile can use this with something like
4955 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
4957 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
4960 See the main perl Makefile.SH for actual working usage.
4962 Alternatively, we might be able to use a command line option such
4963 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
4964 $archlibexp/CORE (Linux).
4966 shsharp (spitshell.U):
4967 This variable tells further Configure units whether your sh can
4970 sig_count (sig_name.U):
4971 This variable holds a number larger than the largest valid
4972 signal number. This is usually the same as the NSIG macro.
4974 sig_name (sig_name.U):
4975 This variable holds the signal names, space separated. The leading
4976 SIG in signal name is removed. A ZERO is prepended to the list.
4977 This is currently not used, sig_name_init is used instead.
4979 sig_name_init (sig_name.U):
4980 This variable holds the signal names, enclosed in double quotes and
4981 separated by commas, suitable for use in the SIG_NAME definition
4982 below. A "ZERO" is prepended to the list, and the list is
4983 terminated with a plain 0. The leading SIG in signal names
4984 is removed. See sig_num.
4986 sig_num (sig_name.U):
4987 This variable holds the signal numbers, space separated. A ZERO is
4988 prepended to the list (corresponding to the fake SIGZERO).
4989 Those numbers correspond to the value of the signal listed
4990 in the same place within the sig_name list.
4991 This is currently not used, sig_num_init is used instead.
4993 sig_num_init (sig_name.U):
4994 This variable holds the signal numbers, enclosed in double quotes and
4995 separated by commas, suitable for use in the SIG_NUM definition
4996 below. A "ZERO" is prepended to the list, and the list is
4997 terminated with a plain 0.
4999 sig_size (sig_name.U):
5000 This variable contains the number of elements of the sig_name
5003 signal_t (d_voidsig.U):
5004 This variable holds the type of the signal handler (void or int).
5006 sitearch (sitearch.U):
5007 This variable contains the eventual value of the SITEARCH symbol,
5008 which is the name of the private library for this package. It may
5009 have a ~ on the front. It is up to the makefile to eventually create
5010 this directory while performing installation (with ~ substitution).
5011 The standard distribution will put nothing in this directory.
5012 After perl has been installed, users may install their own local
5013 architecture-dependent modules in this directory with
5014 MakeMaker Makefile.PL
5015 or equivalent. See INSTALL for details.
5017 sitearchexp (sitearch.U):
5018 This variable is the ~name expanded version of sitearch, so that you
5019 may use it directly in Makefiles or shell scripts.
5021 sitebin (sitebin.U):
5022 This variable holds the name of the directory in which the user wants
5023 to put add-on publicly executable files for the package in question. It
5024 is most often a local directory such as /usr/local/bin. Programs using
5025 this variable must be prepared to deal with ~name substitution.
5026 The standard distribution will put nothing in this directory.
5027 After perl has been installed, users may install their own local
5028 executables in this directory with
5029 MakeMaker Makefile.PL
5030 or equivalent. See INSTALL for details.
5032 sitebinexp (sitebin.U):
5033 This is the same as the sitebin variable, but is filename expanded at
5034 configuration time, for use in your makefiles.
5036 sitehtml1dir (sitehtml1dir.U):
5037 This variable contains the name of the directory in which site-specific
5038 html source pages are to be put. It is the responsibility of the
5039 Makefile.SH to get the value of this into the proper command.
5040 You must be prepared to do the ~name expansion yourself.
5041 The standard distribution will put nothing in this directory.
5042 After perl has been installed, users may install their own local
5043 html pages in this directory with
5044 MakeMaker Makefile.PL
5045 or equivalent. See INSTALL for details.
5047 sitehtml1direxp (sitehtml1dir.U):
5048 This variable is the same as the sitehtml1dir variable, but is filename
5049 expanded at configuration time, for convenient use in makefiles.
5051 sitehtml3dir (sitehtml3dir.U):
5052 This variable contains the name of the directory in which site-specific
5053 library html source pages are to be put. It is the responsibility of the
5054 Makefile.SH to get the value of this into the proper command.
5055 You must be prepared to do the ~name expansion yourself.
5056 The standard distribution will put nothing in this directory.
5057 After perl has been installed, users may install their own local
5058 library html pages in this directory with
5059 MakeMaker Makefile.PL
5060 or equivalent. See INSTALL for details.
5062 sitehtml3direxp (sitehtml3dir.U):
5063 This variable is the same as the sitehtml3dir variable, but is filename
5064 expanded at configuration time, for convenient use in makefiles.
5066 sitelib (sitelib.U):
5067 This variable contains the eventual value of the SITELIB symbol,
5068 which is the name of the private library for this package. It may
5069 have a ~ on the front. It is up to the makefile to eventually create
5070 this directory while performing installation (with ~ substitution).
5071 The standard distribution will put nothing in this directory.
5072 After perl has been installed, users may install their own local
5073 architecture-independent modules in this directory with
5074 MakeMaker Makefile.PL
5075 or equivalent. See INSTALL for details.
5077 sitelib_stem (sitelib.U):
5078 This variable is $sitelibexp with any trailing version-specific component
5079 removed. The elements in inc_version_list (inc_version_list.U) can
5080 be tacked onto this variable to generate a list of directories to search.
5082 sitelibexp (sitelib.U):
5083 This variable is the ~name expanded version of sitelib, so that you
5084 may use it directly in Makefiles or shell scripts.
5086 siteman1dir (siteman1dir.U):
5087 This variable contains the name of the directory in which site-specific
5088 manual source pages are to be put. It is the responsibility of the
5089 Makefile.SH to get the value of this into the proper command.
5090 You must be prepared to do the ~name expansion yourself.
5091 The standard distribution will put nothing in this directory.
5092 After perl has been installed, users may install their own local
5093 man1 pages in this directory with
5094 MakeMaker Makefile.PL
5095 or equivalent. See INSTALL for details.
5097 siteman1direxp (siteman1dir.U):
5098 This variable is the same as the siteman1dir variable, but is filename
5099 expanded at configuration time, for convenient use in makefiles.
5101 siteman3dir (siteman3dir.U):
5102 This variable contains the name of the directory in which site-specific
5103 library man source pages are to be put. It is the responsibility of the
5104 Makefile.SH to get the value of this into the proper command.
5105 You must be prepared to do the ~name expansion yourself.
5106 The standard distribution will put nothing in this directory.
5107 After perl has been installed, users may install their own local
5108 man3 pages in this directory with
5109 MakeMaker Makefile.PL
5110 or equivalent. See INSTALL for details.
5112 siteman3direxp (siteman3dir.U):
5113 This variable is the same as the siteman3dir variable, but is filename
5114 expanded at configuration time, for convenient use in makefiles.
5116 siteprefix (siteprefix.U):
5117 This variable holds the full absolute path of the directory below
5118 which the user will install add-on packages.
5119 See INSTALL for usage and examples.
5121 siteprefixexp (siteprefix.U):
5122 This variable holds the full absolute path of the directory below
5123 which the user will install add-on packages. Derived from siteprefix.
5125 sitescript (sitescript.U):
5126 This variable holds the name of the directory in which the user wants
5127 to put add-on publicly executable files for the package in question. It
5128 is most often a local directory such as /usr/local/bin. Programs using
5129 this variable must be prepared to deal with ~name substitution.
5130 The standard distribution will put nothing in this directory.
5131 After perl has been installed, users may install their own local
5132 scripts in this directory with
5133 MakeMaker Makefile.PL
5134 or equivalent. See INSTALL for details.
5136 sitescriptexp (sitescript.U):
5137 This is the same as the sitescript variable, but is filename expanded at
5138 configuration time, for use in your makefiles.
5140 sizesize (sizesize.U):
5141 This variable contains the size of a sizetype in bytes.
5143 sizetype (sizetype.U):
5144 This variable defines sizetype to be something like size_t,
5145 unsigned long, or whatever type is used to declare length
5146 parameters for string functions.
5149 This variable is defined but not used by Configure.
5150 The value is the empty string and is not useful.
5152 sLOCALTIME_max (time_size.U):
5153 This variable defines the maximum value of the time_t offset that
5154 the system function localtime () accepts
5156 sLOCALTIME_min (time_size.U):
5157 This variable defines the minimum value of the time_t offset that
5158 the system function localtime () accepts
5161 This variable is defined but not used by Configure.
5162 The value is the empty string and is not useful.
5165 This variable holds the extension used to identify shared libraries
5166 (also known as shared objects) on the system. Usually set to 'so'.
5168 sockethdr (d_socket.U):
5169 This variable has any cpp '-I' flags needed for socket support.
5171 socketlib (d_socket.U):
5172 This variable has the names of any libraries needed for socket support.
5174 socksizetype (socksizetype.U):
5175 This variable holds the type used for the size argument
5176 for various socket calls like accept. Usual values include
5177 socklen_t, size_t, and int.
5180 This variable is used internally by Configure to determine the
5181 full pathname (if any) of the sort program. After Configure runs,
5182 the value is reset to a plain "sort" and is not useful.
5184 spackage (package.U):
5185 This variable contains the name of the package being constructed,
5186 with the first letter uppercased, i.e. suitable for starting
5189 spitshell (spitshell.U):
5190 This variable contains the command necessary to spit out a runnable
5191 shell on this system. It is either cat or a grep '-v' for # comments.
5193 sPRId64 (quadfio.U):
5194 This variable, if defined, contains the string used by stdio to
5195 format 64-bit decimal numbers (format 'd') for output.
5197 sPRIeldbl (longdblfio.U):
5198 This variable, if defined, contains the string used by stdio to
5199 format long doubles (format 'e') for output.
5201 sPRIEUldbl (longdblfio.U):
5202 This variable, if defined, contains the string used by stdio to
5203 format long doubles (format 'E') for output.
5204 The 'U' in the name is to separate this from sPRIeldbl so that even
5205 case-blind systems can see the difference.
5207 sPRIfldbl (longdblfio.U):
5208 This variable, if defined, contains the string used by stdio to
5209 format long doubles (format 'f') for output.
5211 sPRIFUldbl (longdblfio.U):
5212 This variable, if defined, contains the string used by stdio to
5213 format long doubles (format 'F') for output.
5214 The 'U' in the name is to separate this from sPRIfldbl so that even
5215 case-blind systems can see the difference.
5217 sPRIgldbl (longdblfio.U):
5218 This variable, if defined, contains the string used by stdio to
5219 format long doubles (format 'g') for output.
5221 sPRIGUldbl (longdblfio.U):
5222 This variable, if defined, contains the string used by stdio to
5223 format long doubles (format 'G') for output.
5224 The 'U' in the name is to separate this from sPRIgldbl so that even
5225 case-blind systems can see the difference.
5227 sPRIi64 (quadfio.U):
5228 This variable, if defined, contains the string used by stdio to
5229 format 64-bit decimal numbers (format 'i') for output.
5231 sPRIo64 (quadfio.U):
5232 This variable, if defined, contains the string used by stdio to
5233 format 64-bit octal numbers (format 'o') for output.
5235 sPRIu64 (quadfio.U):
5236 This variable, if defined, contains the string used by stdio to
5237 format 64-bit unsigned decimal numbers (format 'u') for output.
5239 sPRIx64 (quadfio.U):
5240 This variable, if defined, contains the string used by stdio to
5241 format 64-bit hexadecimal numbers (format 'x') for output.
5243 sPRIXU64 (quadfio.U):
5244 This variable, if defined, contains the string used by stdio to
5245 format 64-bit hExADECimAl numbers (format 'X') for output.
5246 The 'U' in the name is to separate this from sPRIx64 so that even
5247 case-blind systems can see the difference.
5249 srand48_r_proto (d_srand48_r.U):
5250 This variable encodes the prototype of srand48_r.
5251 It is zero if d_srand48_r is undef, and one of the
5252 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srand48_r
5255 srandom_r_proto (d_srandom_r.U):
5256 This variable encodes the prototype of srandom_r.
5257 It is zero if d_srandom_r is undef, and one of the
5258 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srandom_r
5262 This variable holds the (possibly relative) path of the package source.
5263 It is up to the Makefile to use this variable and set VPATH accordingly
5264 to find the sources remotely. Use $pkgsrc to have an absolute path.
5266 sSCNfldbl (longdblfio.U):
5267 This variable, if defined, contains the string used by stdio to
5268 format long doubles (format 'f') for input.
5270 ssizetype (ssizetype.U):
5271 This variable defines ssizetype to be something like ssize_t,
5272 long or int. It is used by functions that return a count
5273 of bytes or an error condition. It must be a signed type.
5274 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
5276 st_ino_sign (st_ino_def.U):
5277 This variable contains the signedness of struct stat's st_ino.
5278 1 for unsigned, -1 for signed.
5280 st_ino_size (st_ino_def.U):
5281 This variable contains the size of struct stat's st_ino in bytes.
5283 startperl (startperl.U):
5284 This variable contains the string to put on the front of a perl
5285 script to make sure (hopefully) that it runs with perl and not some
5286 shell. Of course, that leading line must be followed by the classical
5288 eval 'exec perl -S $0 ${1+"$@"}'
5289 if 0; # ^ Run only under a shell
5290 to guarantee perl startup should the shell execute the script. Note
5291 that this magic incantation is not understood by csh.
5293 startsh (startsh.U):
5294 This variable contains the string to put on the front of a shell
5295 script to make sure (hopefully) that it runs with sh and not some
5298 static_ext (Extensions.U):
5299 This variable holds a list of XS extension files we want to
5300 link statically into the package. It is used by Makefile.
5302 stdchar (stdchar.U):
5303 This variable conditionally defines STDCHAR to be the type of char
5304 used in stdio.h. It has the values "unsigned char" or "char".
5306 stdio_base (d_stdstdio.U):
5307 This variable defines how, given a FILE pointer, fp, to access the
5308 _base field (or equivalent) of stdio.h's FILE structure. This will
5309 be used to define the macro FILE_base(fp).
5311 stdio_bufsiz (d_stdstdio.U):
5312 This variable defines how, given a FILE pointer, fp, to determine
5313 the number of bytes store in the I/O buffer pointer to by the
5314 _base field (or equivalent) of stdio.h's FILE structure. This will
5315 be used to define the macro FILE_bufsiz(fp).
5317 stdio_cnt (d_stdstdio.U):
5318 This variable defines how, given a FILE pointer, fp, to access the
5319 _cnt field (or equivalent) of stdio.h's FILE structure. This will
5320 be used to define the macro FILE_cnt(fp).
5322 stdio_filbuf (d_stdstdio.U):
5323 This variable defines how, given a FILE pointer, fp, to tell
5324 stdio to refill its internal buffers (?). This will
5325 be used to define the macro FILE_filbuf(fp).
5327 stdio_ptr (d_stdstdio.U):
5328 This variable defines how, given a FILE pointer, fp, to access the
5329 _ptr field (or equivalent) of stdio.h's FILE structure. This will
5330 be used to define the macro FILE_ptr(fp).
5332 stdio_stream_array (stdio_streams.U):
5333 This variable tells the name of the array holding the stdio streams.
5334 Usual values include _iob, __iob, and __sF.
5336 strerror_r_proto (d_strerror_r.U):
5337 This variable encodes the prototype of strerror_r.
5338 It is zero if d_strerror_r is undef, and one of the
5339 REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r
5343 This variable is defined but not used by Configure.
5344 The value is the empty string and is not useful.
5346 subversion (patchlevel.U):
5347 The subversion level of this package.
5348 The value of subversion comes from the patchlevel.h file.
5349 In a version number such as 5.6.1, this is the "1".
5350 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
5351 This is unique to perl.
5354 This variable holds the place where the manual is located on this
5355 system. It is not the place where the user wants to put his manual
5356 pages. Rather it is the place where Configure may look to find manual
5357 for unix commands (section 1 of the manual usually). See mansrc.
5359 sysroot (Sysroot.U):
5360 This variable is empty unless supplied by the Configure user.
5361 It can contain a path to an alternative root directory, under which
5362 headers and libraries for the compilation target can be found. This
5363 is generally used when cross-compiling using a gcc-like compiler.
5366 This variable is defined but not used by Configure.
5367 The value is the empty string and is not useful.
5370 This variable is defined but not used by Configure.
5371 The value is the empty string and is not useful.
5373 targetarch (Cross.U):
5374 If cross-compiling, this variable contains the target architecture.
5375 If not, this will be empty.
5377 targetdir (Cross.U):
5378 This variable contains a path that will be created on the target
5379 host using targetmkdir, and then used to copy the cross-compiled
5380 executables to. Defaults to '/tmp' if not set.
5382 targetenv (Cross.U):
5383 If cross-compiling, this variable can be used to modify the
5384 environment on the target system.
5385 However, how and where it's used, and even if it's used at all, is
5386 entirely dependent on both the transport mechanism (targetrun) and
5387 what the target system is. Unless the relevant documentation says
5388 otherwise, it is genereally not useful.
5390 targethost (Cross.U):
5391 This variable contains the name of a separate host machine that
5392 can be used to run compiled test programs and perl tests on.
5393 Set to empty string if not in use.
5395 targetmkdir (Cross.U):
5396 This variable contains the command used by Configure to create a
5397 new directory on the target host.
5399 targetport (Cross.U):
5400 This variable contains the number of a network port to be used to
5401 connect to the host in targethost, if unset defaults to 22 for ssh.
5404 If cross-compiling, this variable contains the location of sh on the
5406 If not, this will be the same as $sh.
5409 This variable is defined but not used by Configure.
5410 The value is the empty string and is not useful.
5413 This variable is defined but not used by Configure.
5414 The value is the empty string and is not useful.
5417 This variable is used internally by Configure to determine the
5418 full pathname (if any) of the test program. After Configure runs,
5419 the value is reset to a plain "test" and is not useful.
5421 timeincl (i_time.U):
5422 This variable holds the full path of the included time header(s).
5424 timetype (d_time.U):
5425 This variable holds the type returned by time(). It can be long,
5426 or time_t on BSD sites (in which case <sys/types.h> should be
5427 included). Anyway, the type Time_t should be used.
5429 tmpnam_r_proto (d_tmpnam_r.U):
5430 This variable encodes the prototype of tmpnam_r.
5431 It is zero if d_tmpnam_r is undef, and one of the
5432 REENTRANT_PROTO_T_ABC macros of reentr.h if d_tmpnam_r
5436 This variable contains the command used by Configure
5437 to copy to from the target host. Useful and available
5438 only during Perl build.
5439 The string ':' if not cross-compiling.
5442 This variable is used internally by Configure to determine the
5443 full pathname (if any) of the touch program. After Configure runs,
5444 the value is reset to a plain "touch" and is not useful.
5447 This variable is used internally by Configure to determine the
5448 full pathname (if any) of the tr program. After Configure runs,
5449 the value is reset to a plain "tr" and is not useful.
5452 This variable contains the value to be passed to the tr(1)
5453 command to transliterate a newline. Typical values are
5454 '\012' and '\n'. This is needed for EBCDIC systems where
5455 newline is not necessarily '\012'.
5458 This variable is defined but not used by Configure.
5459 The value is the empty string and is not useful.
5461 ttyname_r_proto (d_ttyname_r.U):
5462 This variable encodes the prototype of ttyname_r.
5463 It is zero if d_ttyname_r is undef, and one of the
5464 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ttyname_r
5468 This variable is the size of an U16 in bytes.
5471 This variable contains the C type used for Perl's U16.
5474 This variable is the size of an U32 in bytes.
5477 This variable contains the C type used for Perl's U32.
5480 This variable is the size of an U64 in bytes.
5483 This variable contains the C type used for Perl's U64.
5486 This variable is the size of an U8 in bytes.
5489 This variable contains the C type used for Perl's U8.
5492 This variable contains the format string used for printing a Uid_t.
5494 uidsign (uidsign.U):
5495 This variable contains the signedness of a uidtype.
5496 1 for unsigned, -1 for signed.
5498 uidsize (uidsize.U):
5499 This variable contains the size of a uidtype in bytes.
5501 uidtype (uidtype.U):
5502 This variable defines Uid_t to be something like uid_t, int,
5503 ushort, or whatever type is used to declare user ids in the kernel.
5506 This variable is used internally by Configure to determine the
5507 full pathname (if any) of the uname program. After Configure runs,
5508 the value is reset to a plain "uname" and is not useful.
5511 This variable is used internally by Configure to determine the
5512 full pathname (if any) of the uniq program. After Configure runs,
5513 the value is reset to a plain "uniq" and is not useful.
5515 uquadtype (quadtype.U):
5516 This variable defines Uquad_t to be something like unsigned long,
5517 unsigned int, unsigned long long, uint64_t, or whatever type is
5518 used for 64-bit integers.
5520 use5005threads (usethreads.U):
5521 This variable conditionally defines the USE_5005THREADS symbol,
5522 and indicates that Perl should be built to use the 5.005-based
5523 threading implementation. Only valid up to 5.8.x.
5525 use64bitall (use64bits.U):
5526 This variable conditionally defines the USE_64_BIT_ALL symbol,
5527 and indicates that 64-bit integer types should be used
5528 when available. The maximal possible
5529 64-bitness is employed: LP64 or ILP64, meaning that you will
5530 be able to use more than 2 gigabytes of memory. This mode is
5531 even more binary incompatible than USE_64_BIT_INT. You may not
5532 be able to run the resulting executable in a 32-bit CPU at all or
5533 you may need at least to reboot your OS to 64-bit mode.
5535 use64bitint (use64bits.U):
5536 This variable conditionally defines the USE_64_BIT_INT symbol,
5537 and indicates that 64-bit integer types should be used
5538 when available. The minimal possible 64-bitness
5539 is employed, just enough to get 64-bit integers into Perl.
5540 This may mean using for example "long longs", while your memory
5541 may still be limited to 2 gigabytes.
5543 usecbacktrace (usebacktrace.U):
5544 This variable indicates whether we are compiling with backtrace
5547 usecrosscompile (Cross.U):
5548 This variable conditionally defines the USE_CROSS_COMPILE symbol,
5549 and indicates that Perl has been cross-compiled.
5552 This variable indicates that Perl was configured with development
5553 features enabled. This should not be done for production builds.
5556 This variable indicates if the system supports dynamic
5557 loading of some sort. See also dlsrc and dlobj.
5559 usedtrace (usedtrace.U):
5560 This variable indicates whether we are compiling with dtrace
5561 support. See also dtrace.
5563 usefaststdio (usefaststdio.U):
5564 This variable conditionally defines the USE_FAST_STDIO symbol,
5565 and indicates that Perl should be built to use 'fast stdio'.
5566 Defaults to define in Perls 5.8 and earlier, to undef later.
5568 useithreads (usethreads.U):
5569 This variable conditionally defines the USE_ITHREADS symbol,
5570 and indicates that Perl should be built to use the interpreter-based
5571 threading implementation.
5573 usekernprocpathname (usekernprocpathname.U):
5574 This variable, indicates that we can use sysctl with
5575 KERN_PROC_PATHNAME to get a full path for the executable, and hence
5576 convert $^X to an absolute path.
5578 uselanginfo (Extensions.U):
5579 This variable holds either 'true' or 'false' to indicate
5580 whether the I18N::Langinfo extension should be used. The sole
5581 use for this currently is to allow an easy mechanism for users to skip
5582 this extension from the Configure command line.
5584 uselargefiles (uselfs.U):
5585 This variable conditionally defines the USE_LARGE_FILES symbol,
5586 and indicates that large file interfaces should be used when
5589 uselongdouble (uselongdbl.U):
5590 This variable conditionally defines the USE_LONG_DOUBLE symbol,
5591 and indicates that long doubles should be used when available.
5593 usemallocwrap (mallocsrc.U):
5594 This variable contains y if we are wrapping malloc to prevent
5595 integer overflow during size calculations.
5597 usemorebits (usemorebits.U):
5598 This variable conditionally defines the USE_MORE_BITS symbol,
5599 and indicates that explicit 64-bit interfaces and long doubles
5600 should be used when available.
5602 usemultiplicity (usemultiplicity.U):
5603 This variable conditionally defines the MULTIPLICITY symbol,
5604 and indicates that Perl should be built to use multiplicity.
5606 usemymalloc (mallocsrc.U):
5607 This variable contains y if the malloc that comes with this package
5608 is desired over the system's version of malloc. People often include
5609 special versions of malloc for efficiency, but such versions are often
5610 less portable. See also mallocsrc and mallocobj.
5611 If this is 'y', then -lmalloc is removed from $libs.
5614 This variable contains 'true' or 'false' depending whether the
5615 nm extraction is wanted or not.
5617 usensgetexecutablepath (usensgetexecutablepath.U):
5618 This symbol, if defined, indicates that we can use _NSGetExecutablePath
5619 and realpath to get a full path for the executable, and hence convert
5620 $^X to an absolute path.
5622 useopcode (Extensions.U):
5623 This variable holds either 'true' or 'false' to indicate
5624 whether the Opcode extension should be used. The sole
5625 use for this currently is to allow an easy mechanism
5626 for users to skip the Opcode extension from the Configure
5629 useperlio (useperlio.U):
5630 This variable conditionally defines the USE_PERLIO symbol,
5631 and indicates that the PerlIO abstraction should be
5634 useposix (Extensions.U):
5635 This variable holds either 'true' or 'false' to indicate
5636 whether the POSIX extension should be used. The sole
5637 use for this currently is to allow an easy mechanism
5638 for hints files to indicate that POSIX will not compile
5639 on a particular system.
5641 usequadmath (usequadmath.U):
5642 This variable conditionally defines the USE_QUADMATH symbol,
5643 and indicates that the quadmath library __float128 long doubles
5644 should be used when available.
5646 usereentrant (usethreads.U):
5647 This variable conditionally defines the USE_REENTRANT_API symbol,
5648 which indicates that the thread code may try to use the various
5649 _r versions of library functions. This is only potentially
5650 meaningful if usethreads is set and is very experimental, it is
5651 not even prompted for.
5653 userelocatableinc (bin.U):
5654 This variable is set to true to indicate that perl should relocate
5655 @INC entries at runtime based on the path to the perl binary.
5656 Any @INC paths starting ".../" are relocated relative to the directory
5657 containing the perl binary, and a logical cleanup of the path is then
5658 made around the join point (removing "dir/../" pairs)
5660 useshrplib (libperl.U):
5661 This variable is set to 'true' if the user wishes
5662 to build a shared libperl, and 'false' otherwise.
5664 usesitecustomize (d_sitecustomize.U):
5665 This variable is set to true when the user requires a mechanism that
5666 allows the sysadmin to add entries to @INC at runtime. This variable
5667 being set, makes perl run '$sitelib/sitecustomize.pl' at startup.
5669 usesocks (usesocks.U):
5670 This variable conditionally defines the USE_SOCKS symbol,
5671 and indicates that Perl should be built to use SOCKS.
5673 usethreads (usethreads.U):
5674 This variable conditionally defines the USE_THREADS symbol,
5675 and indicates that Perl should be built to use threads.
5677 usevendorprefix (vendorprefix.U):
5678 This variable tells whether the vendorprefix
5679 and consequently other vendor* paths are in use.
5681 useversionedarchname (archname.U):
5682 This variable indicates whether to include the $api_versionstring
5683 as a component of the $archname.
5685 usevfork (d_vfork.U):
5686 This variable is set to true when the user accepts to use vfork.
5687 It is set to false when no vfork is available or when the user
5688 explicitly requests not to use vfork.
5691 This variable holds the path of the include files, which is
5692 usually /usr/include. It is mainly used by other Configure units.
5695 This variable is defined but not used by Configure.
5696 The value is the empty string and is not useful.
5698 uvoformat (perlxvf.U):
5699 This variable contains the format string used for printing
5700 a Perl UV as an unsigned octal integer.
5703 This variable is the size of a UV in bytes.
5706 This variable contains the C type used for Perl's UV.
5708 uvuformat (perlxvf.U):
5709 This variable contains the format string used for printing
5710 a Perl UV as an unsigned decimal integer.
5712 uvxformat (perlxvf.U):
5713 This variable contains the format string used for printing
5714 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
5716 uvXUformat (perlxvf.U):
5717 This variable contains the format string used for printing
5718 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
5720 vendorarch (vendorarch.U):
5721 This variable contains the value of the PERL_VENDORARCH symbol.
5722 It may have a ~ on the front.
5723 The standard distribution will put nothing in this directory.
5724 Vendors who distribute perl may wish to place their own
5725 architecture-dependent modules and extensions in this directory with
5726 MakeMaker Makefile.PL INSTALLDIRS=vendor
5727 or equivalent. See INSTALL for details.
5729 vendorarchexp (vendorarch.U):
5730 This variable is the ~name expanded version of vendorarch, so that you
5731 may use it directly in Makefiles or shell scripts.
5733 vendorbin (vendorbin.U):
5734 This variable contains the eventual value of the VENDORBIN symbol.
5735 It may have a ~ on the front.
5736 The standard distribution will put nothing in this directory.
5737 Vendors who distribute perl may wish to place additional
5738 binaries in this directory with
5739 MakeMaker Makefile.PL INSTALLDIRS=vendor
5740 or equivalent. See INSTALL for details.
5742 vendorbinexp (vendorbin.U):
5743 This variable is the ~name expanded version of vendorbin, so that you
5744 may use it directly in Makefiles or shell scripts.
5746 vendorhtml1dir (vendorhtml1dir.U):
5747 This variable contains the name of the directory for html
5748 pages. It may have a ~ on the front.
5749 The standard distribution will put nothing in this directory.
5750 Vendors who distribute perl may wish to place their own
5751 html pages in this directory with
5752 MakeMaker Makefile.PL INSTALLDIRS=vendor
5753 or equivalent. See INSTALL for details.
5755 vendorhtml1direxp (vendorhtml1dir.U):
5756 This variable is the ~name expanded version of vendorhtml1dir, so that you
5757 may use it directly in Makefiles or shell scripts.
5759 vendorhtml3dir (vendorhtml3dir.U):
5760 This variable contains the name of the directory for html
5761 library pages. It may have a ~ on the front.
5762 The standard distribution will put nothing in this directory.
5763 Vendors who distribute perl may wish to place their own
5764 html pages for modules and extensions in this directory with
5765 MakeMaker Makefile.PL INSTALLDIRS=vendor
5766 or equivalent. See INSTALL for details.
5768 vendorhtml3direxp (vendorhtml3dir.U):
5769 This variable is the ~name expanded version of vendorhtml3dir, so that you
5770 may use it directly in Makefiles or shell scripts.
5772 vendorlib (vendorlib.U):
5773 This variable contains the eventual value of the VENDORLIB symbol,
5774 which is the name of the private library for this package.
5775 The standard distribution will put nothing in this directory.
5776 Vendors who distribute perl may wish to place their own
5777 modules in this directory with
5778 MakeMaker Makefile.PL INSTALLDIRS=vendor
5779 or equivalent. See INSTALL for details.
5781 vendorlib_stem (vendorlib.U):
5782 This variable is $vendorlibexp with any trailing version-specific component
5783 removed. The elements in inc_version_list (inc_version_list.U) can
5784 be tacked onto this variable to generate a list of directories to search.
5786 vendorlibexp (vendorlib.U):
5787 This variable is the ~name expanded version of vendorlib, so that you
5788 may use it directly in Makefiles or shell scripts.
5790 vendorman1dir (vendorman1dir.U):
5791 This variable contains the name of the directory for man1
5792 pages. It may have a ~ on the front.
5793 The standard distribution will put nothing in this directory.
5794 Vendors who distribute perl may wish to place their own
5795 man1 pages in this directory with
5796 MakeMaker Makefile.PL INSTALLDIRS=vendor
5797 or equivalent. See INSTALL for details.
5799 vendorman1direxp (vendorman1dir.U):
5800 This variable is the ~name expanded version of vendorman1dir, so that you
5801 may use it directly in Makefiles or shell scripts.
5803 vendorman3dir (vendorman3dir.U):
5804 This variable contains the name of the directory for man3
5805 pages. It may have a ~ on the front.
5806 The standard distribution will put nothing in this directory.
5807 Vendors who distribute perl may wish to place their own
5808 man3 pages in this directory with
5809 MakeMaker Makefile.PL INSTALLDIRS=vendor
5810 or equivalent. See INSTALL for details.
5812 vendorman3direxp (vendorman3dir.U):
5813 This variable is the ~name expanded version of vendorman3dir, so that you
5814 may use it directly in Makefiles or shell scripts.
5816 vendorprefix (vendorprefix.U):
5817 This variable holds the full absolute path of the directory below
5818 which the vendor will install add-on packages.
5819 See INSTALL for usage and examples.
5821 vendorprefixexp (vendorprefix.U):
5822 This variable holds the full absolute path of the directory below
5823 which the vendor will install add-on packages. Derived from vendorprefix.
5825 vendorscript (vendorscript.U):
5826 This variable contains the eventual value of the VENDORSCRIPT symbol.
5827 It may have a ~ on the front.
5828 The standard distribution will put nothing in this directory.
5829 Vendors who distribute perl may wish to place additional
5830 executable scripts in this directory with
5831 MakeMaker Makefile.PL INSTALLDIRS=vendor
5832 or equivalent. See INSTALL for details.
5834 vendorscriptexp (vendorscript.U):
5835 This variable is the ~name expanded version of vendorscript, so that you
5836 may use it directly in Makefiles or shell scripts.
5838 version (patchlevel.U):
5839 The full version number of this package, such as 5.6.1 (or 5_6_1).
5840 This combines revision, patchlevel, and subversion to get the
5841 full version number, including any possible subversions.
5842 This is suitable for use as a directory name, and hence is
5843 filesystem dependent.
5845 version_patchlevel_string (patchlevel.U):
5846 This is a string combining version, subversion and
5847 perl_patchlevel (if perl_patchlevel is non-zero).
5848 It is typically something like
5849 'version 7 subversion 1' or
5850 'version 7 subversion 1 patchlevel 11224'
5851 It is computed here to avoid duplication of code in myconfig.SH
5854 versiononly (versiononly.U):
5855 If set, this symbol indicates that only the version-specific
5856 components of a perl installation should be installed.
5857 This may be useful for making a test installation of a new
5858 version without disturbing the existing installation.
5859 Setting versiononly is equivalent to setting installperl's -v option.
5860 In particular, the non-versioned scripts and programs such as
5861 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
5862 (see INSTALL for a more complete list). Nor are the man
5864 Usually, this is undef.
5867 This variable is defined but not used by Configure.
5868 The value is the empty string and is not useful.
5871 This variable holds extra path (space-separated) used to find
5872 libraries on this platform, for example CPU-specific libraries
5873 (on multi-CPU platforms) may be listed here.
5876 This variable holds the name of the compiler compiler we
5877 want to use in the Makefile. It can be yacc, byacc, or bison -y.
5880 This variable contains any additional yacc flags desired by the
5881 user. It is up to the Makefile to use this.
5884 This variable is defined but not used by Configure.
5885 The value is the empty string and is not useful.
5888 This variable is used internally by Configure to determine the
5889 full pathname (if any) of the zip program. After Configure runs,
5890 the value is reset to a plain "zip" and is not useful.