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 ansi2knr (ansi2knr.U):
45 This variable is set if the user needs to run ansi2knr.
46 Currently, this is not supported, so we just abort.
48 aphostname (d_gethname.U):
49 This variable contains the command which can be used to compute the
50 host name. The command is fully qualified by its absolute path, to make
51 it safe when used by a process with super-user privileges.
53 api_revision (patchlevel.U):
54 The three variables, api_revision, api_version, and
55 api_subversion, specify the version of the oldest perl binary
56 compatible with the present perl. In a full version string
57 such as '5.6.1', api_revision is the '5'.
58 Prior to 5.5.640, the format was a floating point number,
61 perl.c:incpush() and lib/lib.pm will automatically search in
62 $sitelib/.. for older directories back to the limit specified
63 by these api_ variables. This is only useful if you have a
64 perl library directory tree structured like the default one.
65 See INSTALL for how this works. The versioned site_perl
66 directory was introduced in 5.005, so that is the lowest
67 possible value. The version list appropriate for the current
68 system is determined in inc_version_list.U.
70 XXX To do: Since compatibility can depend on compile time
71 options (such as bincompat, longlong, etc.) it should
72 (perhaps) be set by Configure, but currently it isn't.
73 Currently, we read a hard-wired value from patchlevel.h.
74 Perhaps what we ought to do is take the hard-wired value from
75 patchlevel.h but then modify it if the current Configure
76 options warrant. patchlevel.h then would use an #ifdef guard.
78 api_subversion (patchlevel.U):
79 The three variables, api_revision, api_version, and
80 api_subversion, specify the version of the oldest perl binary
81 compatible with the present perl. In a full version string
82 such as '5.6.1', api_subversion is the '1'. See api_revision for
85 api_version (patchlevel.U):
86 The three variables, api_revision, api_version, and
87 api_subversion, specify the version of the oldest perl binary
88 compatible with the present perl. In a full version string
89 such as '5.6.1', api_version is the '6'. See api_revision for
90 full details. As a special case, 5.5.0 is rendered in the
91 old-style as 5.005. (In the 5.005_0x maintenance series,
92 this was the only versioned directory in $sitelib.)
94 api_versionstring (patchlevel.U):
95 This variable combines api_revision, api_version, and
96 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
97 for use as a directory name. This is filesystem dependent.
100 This variable is used internally by Configure to determine the
101 full pathname (if any) of the ar program. After Configure runs,
102 the value is reset to a plain "ar" and is not useful.
105 This variable holds the name of the directory in which the user wants
106 to put architecture-dependent public library files for $package.
107 It is most often a local directory such as /usr/local/lib.
108 Programs using this variable must be prepared to deal
109 with filename expansion.
111 archlibexp (archlib.U):
112 This variable is the same as the archlib variable, but is
113 filename expanded at configuration time, for convenient use.
115 archname (archname.U):
116 This variable is a short name to characterize the current
117 architecture. It is used mainly to construct the default archlib.
119 archname64 (use64bits.U):
120 This variable is used for the 64-bitness part of $archname.
123 This variable defines any additional objects that must be linked
124 in with the program on this architecture. On unix, it is usually
125 empty. It is typically used to include emulations of unix calls
126 or other facilities. For perl on OS/2, for example, this would
129 asctime_r_proto (d_asctime_r.U):
130 This variable encodes the prototype of asctime_r.
131 It is zero if d_asctime_r is undef, and one of the
132 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
136 This variable is used internally by Configure to determine the
137 full pathname (if any) of the awk program. After Configure runs,
138 the value is reset to a plain "awk" and is not useful.
141 The base revision level of this package, from the .package file.
144 This variable is defined but not used by Configure.
145 The value is the empty string and is not useful.
148 This variable holds the name of the directory in which the user wants
149 to put publicly executable images for the package in question. It
150 is most often a local directory such as /usr/local/bin. Programs using
151 this variable must be prepared to deal with ~name substitution.
154 This variable saves the result from configure if generated binaries
155 are in ELF format. Only set to defined when the test has actually
156 been performed, and the result was positive.
159 This is the same as the bin variable, but is filename expanded at
160 configuration time, for use in your makefiles.
163 This variable is used internally by Configure to determine the
164 full pathname (if any) of the bison program. After Configure runs,
165 the value is reset to a plain "bison" and is not useful.
167 bootstrap_charset (ebcdic.U):
168 This variable conditionally defines BOOTSTRAP_CHARSET if
169 this system uses non-ASCII encoding.
172 This variable is used internally by Configure to determine the
173 full pathname (if any) of the byacc program. After Configure runs,
174 the value is reset to a plain "byacc" and is not useful.
176 byteorder (byteorder.U):
177 This variable holds the byte order in a UV. In the following,
178 larger digits indicate more significance. The variable byteorder
179 is either 4321 on a big-endian machine, or 1234 on a little-endian,
180 or 87654321 on a Cray ... or 3412 with weird order !
183 This variable contains the \c string if that is what causes the echo
184 command to suppress newline. Otherwise it is null. Correct usage is
185 $echo $n "prompt for a question: $c".
187 castflags (d_castneg.U):
188 This variable contains a flag that precise difficulties the
189 compiler has casting odd floating values to unsigned long:
191 1 = couldn't cast < 0
192 2 = couldn't cast >= 0x80000000
193 4 = couldn't cast in argument expression list
196 This variable is used internally by Configure to determine the
197 full pathname (if any) of the cat program. After Configure runs,
198 the value is reset to a plain "cat" and is not useful.
201 This variable holds the name of a command to execute a C compiler which
202 can resolve multiple global references that happen to have the same
203 name. Usual values are 'cc' and 'gcc'.
204 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
206 cccdlflags (dlsrc.U):
207 This variable contains any special flags that might need to be
208 passed with 'cc -c' to compile modules to be used to create a shared
209 library that will be used for dynamic loading. For hpux, this
210 should be +z. It is up to the makefile to use it.
213 This variable contains any special flags that might need to be
214 passed to cc to link with a shared library for dynamic loading.
215 It is up to the makefile to use it. For sunos 4.1, it should
219 This variable contains any additional C compiler flags desired by
220 the user. It is up to the Makefile to use this.
222 ccflags_uselargefiles (uselfs.U):
223 This variable contains the compiler flags needed by large file builds
224 and added to ccflags by hints files.
227 This can set either by hints files or by Configure. If using
228 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
229 Some platforms, however, make good use of this by storing the
230 flavor of the C compiler being used here. For example if using
231 the Sun WorkShop suite, ccname will be 'workshop'.
233 ccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler alone.
235 The symbols defined by cpp or by cc when it calls cpp are not in
236 this list, see cppsymbols and cppccsymbols.
237 The list is a space-separated list of symbol=value tokens.
239 ccversion (Checkcc.U):
240 This can set either by hints files or by Configure. If using
241 a (non-gcc) vendor cc, this variable may contain a version for
245 Login name of the person who ran the Configure script and answered the
246 questions. This is used to tag both config.sh and config_h.SH.
248 cf_email (cf_email.U):
249 Electronic mail address of the person who ran Configure. This can be
250 used by units that require the user's e-mail, like MailList.U.
253 Holds the output of the "date" command when the configuration file was
254 produced. This is used to tag both config.sh and config_h.SH.
256 charbits (charsize.U):
257 This variable contains the value of the CHARBITS symbol, which
258 indicates to the C program how many bits there are in a character.
260 charsize (charsize.U):
261 This variable contains the value of the CHARSIZE symbol, which
262 indicates to the C program how many bytes there are in a character.
265 This variable is defined but not used by Configure.
266 The value is the empty string and is not useful.
269 This variable is used internally by Configure to determine the
270 full pathname (if any) of the chmod program. After Configure runs,
271 the value is reset to a plain "chmod" and is not useful.
274 This variable is defined but not used by Configure.
275 The value is the empty string and is not useful.
277 clocktype (d_times.U):
278 This variable holds the type returned by times(). It can be long,
279 or clock_t on BSD sites (in which case <sys/types.h> should be
283 This variable is used internally by Configure to determine the
284 full pathname (if any) of the comm program. After Configure runs,
285 the value is reset to a plain "comm" and is not useful.
288 This variable is defined but not used by Configure.
289 The value is the empty string and is not useful.
291 config_arg0 (Options.U):
292 This variable contains the string used to invoke the Configure
293 command, as reported by the shell in the $0 variable.
295 config_argc (Options.U):
296 This variable contains the number of command-line arguments
297 passed to Configure, as reported by the shell in the $# variable.
298 The individual arguments are stored as variables config_arg1,
301 config_args (Options.U):
302 This variable contains a single string giving the command-line
303 arguments passed to Configure. Spaces within arguments,
304 quotes, and escaped characters are not correctly preserved.
305 To reconstruct the command line, you must assemble the individual
306 command line pieces, given in config_arg[0-9]*.
308 contains (contains.U):
309 This variable holds the command to do a grep with a proper return
310 status. On most sane systems it is simply "grep". On insane systems
311 it is a grep followed by a cat followed by a test. This variable
312 is primarily for the use of other Configure units.
315 This variable is used internally by Configure to determine the
316 full pathname (if any) of the cp program. After Configure runs,
317 the value is reset to a plain "cp" and is not useful.
320 This variable is defined but not used by Configure.
321 The value is the empty string and is not useful.
324 This variable is used internally by Configure to determine the
325 full pathname (if any) of the cpp program. After Configure runs,
326 the value is reset to a plain "cpp" and is not useful.
328 cpp_stuff (cpp_stuff.U):
329 This variable contains an identification of the concatenation mechanism
330 used by the C preprocessor.
332 cppccsymbols (Cppsym.U):
333 The variable contains the symbols defined by the C compiler
334 when it calls cpp. The symbols defined by the cc alone or cpp
335 alone are not in this list, see ccsymbols and cppsymbols.
336 The list is a space-separated list of symbol=value tokens.
338 cppflags (ccflags.U):
339 This variable holds the flags that will be passed to the C pre-
340 processor. It is up to the Makefile to use it.
342 cpplast (cppstdin.U):
343 This variable has the same functionality as cppminus, only it applies
344 to cpprun and not cppstdin.
346 cppminus (cppstdin.U):
347 This variable contains the second part of the string which will invoke
348 the C preprocessor on the standard input and produce to standard
349 output. This variable will have the value "-" if cppstdin needs
350 a minus to specify standard input, otherwise the value is "".
353 This variable contains the command which will invoke a C preprocessor
354 on standard input and put the output to stdout. It is guaranteed not
355 to be a wrapper and may be a null string if no preprocessor can be
356 made directly available. This preprocessor might be different from the
357 one used by the C compiler. Don't forget to append cpplast after the
358 preprocessor options.
360 cppstdin (cppstdin.U):
361 This variable contains the command which will invoke the C
362 preprocessor on standard input and put the output to stdout.
363 It is primarily used by other Configure units that ask about
364 preprocessor symbols.
366 cppsymbols (Cppsym.U):
367 The variable contains the symbols defined by the C preprocessor
368 alone. The symbols defined by cc or by cc when it calls cpp are
369 not in this list, see ccsymbols and cppccsymbols.
370 The list is a space-separated list of symbol=value tokens.
372 crypt_r_proto (d_crypt_r.U):
373 This variable encodes the prototype of crypt_r.
374 It is zero if d_crypt_r is undef, and one of the
375 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
378 cryptlib (d_crypt.U):
379 This variable holds -lcrypt or the path to a libcrypt.a archive if
380 the crypt() function is not defined in the standard C library. It is
381 up to the Makefile to use this.
384 This variable is used internally by Configure to determine the
385 full pathname (if any) of the csh program. After Configure runs,
386 the value is reset to a plain "csh" and is not useful.
388 ctermid_r_proto (d_ctermid_r.U):
389 This variable encodes the prototype of ctermid_r.
390 It is zero if d_ctermid_r is undef, and one of the
391 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
394 ctime_r_proto (d_ctime_r.U):
395 This variable encodes the prototype of ctime_r.
396 It is zero if d_ctime_r is undef, and one of the
397 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
400 d__fwalk (d__fwalk.U):
401 This variable conditionally defines HAS__FWALK if _fwalk() is
402 available to apply a function to all the file handles.
404 d_access (d_access.U):
405 This variable conditionally defines HAS_ACCESS if the access() system
406 call is available to check for access permissions using real IDs.
408 d_accessx (d_accessx.U):
409 This variable conditionally defines the HAS_ACCESSX symbol, which
410 indicates to the C program that the accessx() 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_ATOLF symbol, which
437 indicates to the C program that the atolf() routine is available.
440 This variable conditionally defines the HAS_ATOLL symbol, which
441 indicates to the C program that the atoll() routine is available.
443 d_attribute_deprecated (d_attribut.U):
444 This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
445 indicates that GCC can handle the attribute for marking deprecated
448 d_attribute_format (d_attribut.U):
449 This variable conditionally defines HASATTRIBUTE_FORMAT, which
450 indicates the C compiler can check for printf-like formats.
452 d_attribute_malloc (d_attribut.U):
453 This variable conditionally defines HASATTRIBUTE_MALLOC, which
454 indicates the C compiler can understand functions as having
455 malloc-like semantics.
457 d_attribute_nonnull (d_attribut.U):
458 This variable conditionally defines HASATTRIBUTE_NONNULL, which
459 indicates that the C compiler can know that certain arguments
460 must not be NULL, and will check accordingly at compile time.
462 d_attribute_noreturn (d_attribut.U):
463 This variable conditionally defines HASATTRIBUTE_NORETURN, which
464 indicates that the C compiler can know that certain functions
465 are guaranteed never to return.
467 d_attribute_pure (d_attribut.U):
468 This variable conditionally defines HASATTRIBUTE_PURE, which
469 indicates that the C compiler can know that certain functions
470 are "pure" functions, meaning that they have no side effects, and
471 only rely on function input and/or global data for their results.
473 d_attribute_unused (d_attribut.U):
474 This variable conditionally defines HASATTRIBUTE_UNUSED, which
475 indicates that the C compiler can know that certain variables
476 and arguments may not always be used, and to not throw warnings
477 if they don't get used.
479 d_attribute_warn_unused_result (d_attribut.U):
480 This variable conditionally defines
481 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
482 compiler can know that certain functions have a return values
483 that must not be ignored, such as malloc() or open().
486 This variable conditionally defines the HAS_BCMP symbol if
487 the bcmp() routine is available to compare strings.
490 This variable conditionally defines the HAS_BCOPY symbol if
491 the bcopy() routine is available to copy strings.
494 This symbol conditionally defines the symbol BSD when running on a
497 d_bsdgetpgrp (d_getpgrp.U):
498 This variable conditionally defines USE_BSD_GETPGRP if
499 getpgrp needs one arguments whereas USG one needs none.
501 d_bsdsetpgrp (d_setpgrp.U):
502 This variable conditionally defines USE_BSD_SETPGRP if
503 setpgrp needs two arguments whereas USG one needs none.
504 See also d_setpgid for a POSIX interface.
506 d_builtin_choose_expr (d_builtin.U):
507 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
508 indicates that the compiler supports __builtin_choose_expr(x,y,z).
509 This built-in function is analogous to the "x?y:z" operator in C,
510 except that the expression returned has its type unaltered by
511 promotion rules. Also, the built-in function does not evaluate
512 the expression that was not chosen.
514 d_builtin_expect (d_builtin.U):
515 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
516 that the compiler supports __builtin_expect(exp,c). You may use
517 __builtin_expect to provide the compiler with branch prediction
521 This variable conditionally defines the HAS_BZERO symbol if
522 the bzero() routine is available to set memory to 0.
524 d_c99_variadic_macros (d_c99_variadic.U):
525 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
526 symbol, which indicates to the C program that C99 variadic macros
529 d_casti32 (d_casti32.U):
530 This variable conditionally defines CASTI32, which indicates
531 whether the C compiler can cast large floats to 32-bit ints.
533 d_castneg (d_castneg.U):
534 This variable conditionally defines CASTNEG, which indicates
535 whether the C compiler can cast negative float to unsigned.
537 d_charvspr (d_vprintf.U):
538 This variable conditionally defines CHARVSPRINTF if this system
539 has vsprintf returning type (char*). The trend seems to be to
540 declare it as "int vsprintf()".
543 This variable conditionally defines the HAS_CHOWN symbol, which
544 indicates to the C program that the chown() routine is available.
546 d_chroot (d_chroot.U):
547 This variable conditionally defines the HAS_CHROOT symbol, which
548 indicates to the C program that the chroot() routine is available.
550 d_chsize (d_chsize.U):
551 This variable conditionally defines the CHSIZE symbol, which
552 indicates to the C program that the chsize() routine is available
553 to truncate files. You might need a -lx to get this routine.
556 This variable conditionally defines the HAS_CLASS symbol, which
557 indicates to the C program that the class() routine is available.
559 d_clearenv (d_clearenv.U):
560 This variable conditionally defines the HAS_CLEARENV symbol, which
561 indicates to the C program that the clearenv () routine is available.
563 d_closedir (d_closedir.U):
564 This variable conditionally defines HAS_CLOSEDIR if closedir() is
567 d_cmsghdr_s (d_cmsghdr_s.U):
568 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
569 which indicates that the struct cmsghdr is supported.
572 This variable conditionally defines the HASCONST symbol, which
573 indicates to the C program that this C compiler knows about the
576 d_copysignl (d_copysignl.U):
577 This variable conditionally defines the HAS_COPYSIGNL symbol, which
578 indicates to the C program that the copysignl() routine is available.
579 If aintl is also present we can emulate modfl.
581 d_cplusplus (d_cplusplus.U):
582 This variable conditionally defines the USE_CPLUSPLUS symbol, which
583 indicates that a C++ compiler was used to compiled Perl and will be
584 used to compile extensions.
587 This variable conditionally defines the CRYPT symbol, which
588 indicates to the C program that the crypt() routine is available
589 to encrypt passwords and the like.
591 d_crypt_r (d_crypt_r.U):
592 This variable conditionally defines the HAS_CRYPT_R symbol,
593 which indicates to the C program that the crypt_r()
594 routine is available.
597 This variable conditionally defines the CSH symbol, which
598 indicates to the C program that the C-shell exists.
600 d_ctermid (d_ctermid.U):
601 This variable conditionally defines CTERMID if ctermid() is
602 available to generate filename for terminal.
604 d_ctermid_r (d_ctermid_r.U):
605 This variable conditionally defines the HAS_CTERMID_R symbol,
606 which indicates to the C program that the ctermid_r()
607 routine is available.
609 d_ctime64 (d_timefuncs64.U):
610 This variable conditionally defines the HAS_CTIME64 symbol, which
611 indicates to the C program that the ctime64 () routine is available.
613 d_ctime_r (d_ctime_r.U):
614 This variable conditionally defines the HAS_CTIME_R symbol,
615 which indicates to the C program that the ctime_r()
616 routine is available.
618 d_cuserid (d_cuserid.U):
619 This variable conditionally defines the HAS_CUSERID symbol, which
620 indicates to the C program that the cuserid() routine is available
621 to get character login names.
623 d_dbl_dig (d_dbl_dig.U):
624 This variable conditionally defines d_dbl_dig if this system's
625 header files provide DBL_DIG, which is the number of significant
626 digits in a double precision number.
628 d_dbminitproto (d_dbminitproto.U):
629 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
630 which indicates to the C program that the system provides
631 a prototype for the dbminit() function. Otherwise, it is
632 up to the program to supply one.
634 d_difftime (d_difftime.U):
635 This variable conditionally defines the HAS_DIFFTIME symbol, which
636 indicates to the C program that the difftime() routine is available.
638 d_difftime64 (d_timefuncs64.U):
639 This variable conditionally defines the HAS_DIFFTIME64 symbol, which
640 indicates to the C program that the difftime64 () routine is available.
642 d_dir_dd_fd (d_dir_dd_fd.U):
643 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
644 indicates that the DIR directory stream type contains a member
645 variable called dd_fd.
648 This variable conditionally defines the HAS_DIRFD constant,
649 which indicates to the C program that dirfd() is available
650 to return the file descriptor of a directory stream.
652 d_dirnamlen (i_dirent.U):
653 This variable conditionally defines DIRNAMLEN, which indicates
654 to the C program that the length of directory entry names is
655 provided by a d_namelen field.
657 d_dlerror (d_dlerror.U):
658 This variable conditionally defines the HAS_DLERROR symbol, which
659 indicates to the C program that the dlerror() routine is available.
661 d_dlopen (d_dlopen.U):
662 This variable conditionally defines the HAS_DLOPEN symbol, which
663 indicates to the C program that the dlopen() routine is available.
665 d_dlsymun (d_dlsymun.U):
666 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
667 indicates that we need to prepend an underscore to the symbol
668 name before calling dlsym().
670 d_dosuid (d_dosuid.U):
671 This variable conditionally defines the symbol DOSUID, which
672 tells the C program that it should insert setuid emulation code
673 on hosts which have setuid #! scripts disabled.
675 d_drand48_r (d_drand48_r.U):
676 This variable conditionally defines the HAS_DRAND48_R symbol,
677 which indicates to the C program that the drand48_r()
678 routine is available.
680 d_drand48proto (d_drand48proto.U):
681 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
682 which indicates to the C program that the system provides
683 a prototype for the drand48() function. Otherwise, it is
684 up to the program to supply one.
687 This variable conditionally defines HAS_DUP2 if dup2() is
688 available to duplicate file descriptors.
690 d_eaccess (d_eaccess.U):
691 This variable conditionally defines the HAS_EACCESS symbol, which
692 indicates to the C program that the eaccess() routine is available.
694 d_endgrent (d_endgrent.U):
695 This variable conditionally defines the HAS_ENDGRENT symbol, which
696 indicates to the C program that the endgrent() routine is available
697 for sequential access of the group database.
699 d_endgrent_r (d_endgrent_r.U):
700 This variable conditionally defines the HAS_ENDGRENT_R symbol,
701 which indicates to the C program that the endgrent_r()
702 routine is available.
704 d_endhent (d_endhent.U):
705 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
706 available to close whatever was being used for host queries.
708 d_endhostent_r (d_endhostent_r.U):
709 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
710 which indicates to the C program that the endhostent_r()
711 routine is available.
713 d_endnent (d_endnent.U):
714 This variable conditionally defines HAS_ENDNETENT if endnetent() is
715 available to close whatever was being used for network queries.
717 d_endnetent_r (d_endnetent_r.U):
718 This variable conditionally defines the HAS_ENDNETENT_R symbol,
719 which indicates to the C program that the endnetent_r()
720 routine is available.
722 d_endpent (d_endpent.U):
723 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
724 available to close whatever was being used for protocol queries.
726 d_endprotoent_r (d_endprotoent_r.U):
727 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
728 which indicates to the C program that the endprotoent_r()
729 routine is available.
731 d_endpwent (d_endpwent.U):
732 This variable conditionally defines the HAS_ENDPWENT symbol, which
733 indicates to the C program that the endpwent() routine is available
734 for sequential access of the passwd database.
736 d_endpwent_r (d_endpwent_r.U):
737 This variable conditionally defines the HAS_ENDPWENT_R symbol,
738 which indicates to the C program that the endpwent_r()
739 routine is available.
741 d_endsent (d_endsent.U):
742 This variable conditionally defines HAS_ENDSERVENT if endservent() is
743 available to close whatever was being used for service queries.
745 d_endservent_r (d_endservent_r.U):
746 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
747 which indicates to the C program that the endservent_r()
748 routine is available.
750 d_eofnblk (nblock_io.U):
751 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
752 when reading from a non-blocking I/O source.
755 This variable conditionally defines the symbols EUNICE and VAX, which
756 alerts the C program that it must deal with idiosyncrasies of VMS.
758 d_faststdio (d_faststdio.U):
759 This variable conditionally defines the HAS_FAST_STDIO symbol,
760 which indicates to the C program that the "fast stdio" is available
761 to manipulate the stdio buffers directly.
763 d_fchdir (d_fchdir.U):
764 This variable conditionally defines the HAS_FCHDIR symbol, which
765 indicates to the C program that the fchdir() routine is available.
767 d_fchmod (d_fchmod.U):
768 This variable conditionally defines the HAS_FCHMOD symbol, which
769 indicates to the C program that the fchmod() routine is available
770 to change mode of opened files.
772 d_fchown (d_fchown.U):
773 This variable conditionally defines the HAS_FCHOWN symbol, which
774 indicates to the C program that the fchown() routine is available
775 to change ownership of opened files.
778 This variable conditionally defines the HAS_FCNTL symbol, and indicates
779 whether the fcntl() function exists
781 d_fcntl_can_lock (d_fcntl_can_lock.U):
782 This variable conditionally defines the FCNTL_CAN_LOCK symbol
783 and indicates whether file locking with fcntl() works.
785 d_fd_macros (d_fd_set.U):
786 This variable contains the eventual value of the HAS_FD_MACROS symbol,
787 which indicates if your C compiler knows about the macros which
788 manipulate an fd_set.
790 d_fd_set (d_fd_set.U):
791 This variable contains the eventual value of the HAS_FD_SET symbol,
792 which indicates if your C compiler knows about the fd_set typedef.
794 d_fds_bits (d_fd_set.U):
795 This variable contains the eventual value of the HAS_FDS_BITS symbol,
796 which indicates if your fd_set typedef contains the fds_bits member.
797 If you have an fd_set typedef, but the dweebs who installed it did
798 a half-fast job and neglected to provide the macros to manipulate
799 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
801 d_fgetpos (d_fgetpos.U):
802 This variable conditionally defines HAS_FGETPOS if fgetpos() is
803 available to get the file position indicator.
805 d_finite (d_finite.U):
806 This variable conditionally defines the HAS_FINITE symbol, which
807 indicates to the C program that the finite() routine is available.
809 d_finitel (d_finitel.U):
810 This variable conditionally defines the HAS_FINITEL symbol, which
811 indicates to the C program that the finitel() routine is available.
813 d_flexfnam (d_flexfnam.U):
814 This variable conditionally defines the FLEXFILENAMES symbol, which
815 indicates that the system supports filenames longer than 14 characters.
818 This variable conditionally defines HAS_FLOCK if flock() is
819 available to do file locking.
821 d_flockproto (d_flockproto.U):
822 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
823 which indicates to the C program that the system provides
824 a prototype for the flock() function. Otherwise, it is
825 up to the program to supply one.
828 This variable conditionally defines the HAS_FORK symbol, which
829 indicates to the C program that the fork() routine is available.
831 d_fp_class (d_fp_class.U):
832 This variable conditionally defines the HAS_FP_CLASS symbol, which
833 indicates to the C program that the fp_class() routine is available.
835 d_fpathconf (d_pathconf.U):
836 This variable conditionally defines the HAS_FPATHCONF symbol, which
837 indicates to the C program that the pathconf() routine is available
838 to determine file-system related limits and options associated
839 with a given open file descriptor.
841 d_fpclass (d_fpclass.U):
842 This variable conditionally defines the HAS_FPCLASS symbol, which
843 indicates to the C program that the fpclass() routine is available.
845 d_fpclassify (d_fpclassify.U):
846 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
847 indicates to the C program that the fpclassify() routine is available.
849 d_fpclassl (d_fpclassl.U):
850 This variable conditionally defines the HAS_FPCLASSL symbol, which
851 indicates to the C program that the fpclassl() routine is available.
853 d_fpos64_t (d_fpos64_t.U):
854 This symbol will be defined if the C compiler supports fpos64_t.
856 d_frexpl (d_frexpl.U):
857 This variable conditionally defines the HAS_FREXPL symbol, which
858 indicates to the C program that the frexpl() routine is available.
860 d_fs_data_s (d_fs_data_s.U):
861 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
862 which indicates that the struct fs_data is supported.
864 d_fseeko (d_fseeko.U):
865 This variable conditionally defines the HAS_FSEEKO symbol, which
866 indicates to the C program that the fseeko() routine is available.
868 d_fsetpos (d_fsetpos.U):
869 This variable conditionally defines HAS_FSETPOS if fsetpos() is
870 available to set the file position indicator.
872 d_fstatfs (d_fstatfs.U):
873 This variable conditionally defines the HAS_FSTATFS symbol, which
874 indicates to the C program that the fstatfs() routine is available.
876 d_fstatvfs (d_statvfs.U):
877 This variable conditionally defines the HAS_FSTATVFS symbol, which
878 indicates to the C program that the fstatvfs() routine is available.
881 This variable conditionally defines the HAS_FSYNC symbol, which
882 indicates to the C program that the fsync() routine is available.
884 d_ftello (d_ftello.U):
885 This variable conditionally defines the HAS_FTELLO symbol, which
886 indicates to the C program that the ftello() routine is available.
889 This variable conditionally defines the HAS_FTIME symbol, which indicates
890 that the ftime() routine exists. The ftime() routine is basically
891 a sub-second accuracy clock.
893 d_futimes (d_futimes.U):
894 This variable conditionally defines the HAS_FUTIMES symbol, which
895 indicates to the C program that the futimes() routine is available.
897 d_Gconvert (d_gconvert.U):
898 This variable holds what Gconvert is defined as to convert
899 floating point numbers into strings. By default, Configure
900 sets this macro to use the first of gconvert, gcvt, or sprintf
901 that pass sprintf-%g-like behavior tests. If perl is using
902 long doubles, the macro uses the first of the following
903 functions that pass Configure's tests: qgcvt, sprintf (if
904 Configure knows how to make sprintf format long doubles--see
905 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
906 The gconvert_preference and gconvert_ld_preference variables
907 can be used to alter Configure's preferences, for doubles and
908 long doubles, respectively. If present, they contain a
909 space-separated list of one or more of the above function
910 names in the order they should be tried.
912 d_Gconvert may be set to override Configure with a platform-
913 specific function. If this function expects a double, a
914 different value may need to be set by the uselongdouble.cbu
915 call-back unit so that long doubles can be formatted without
918 d_gdbm_ndbm_h_uses_prototypes (i_ndbm.U):
919 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
920 which indicates that the gdbm-ndbm.h include file uses real ANSI C
921 prototypes instead of K&R style function declarations. K&R style
922 declarations are unsupported in C++, so the include file requires
923 special handling when using a C++ compiler and this variable is
924 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
925 to get the same information for alternative ndbm.h include files.
927 d_gdbmndbm_h_uses_prototypes (i_ndbm.U):
928 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
929 which indicates that the gdbm/ndbm.h include file uses real ANSI C
930 prototypes instead of K&R style function declarations. K&R style
931 declarations are unsupported in C++, so the include file requires
932 special handling when using a C++ compiler and this variable is
933 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
934 to get the same information for alternative ndbm.h include files.
936 d_getaddrinfo (d_getaddrinfo.U):
937 This variable conditionally defines the HAS_GETADDRINFO symbol,
938 which indicates to the C program that the getaddrinfo() function
941 d_getcwd (d_getcwd.U):
942 This variable conditionally defines the HAS_GETCWD symbol, which
943 indicates to the C program that the getcwd() routine is available
944 to get the current working directory.
946 d_getespwnam (d_getespwnam.U):
947 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
948 available to retrieve enhanced (shadow) password entries by name.
950 d_getfsstat (d_getfsstat.U):
951 This variable conditionally defines the HAS_GETFSSTAT symbol, which
952 indicates to the C program that the getfsstat() routine is available.
954 d_getgrent (d_getgrent.U):
955 This variable conditionally defines the HAS_GETGRENT symbol, which
956 indicates to the C program that the getgrent() routine is available
957 for sequential access of the group database.
959 d_getgrent_r (d_getgrent_r.U):
960 This variable conditionally defines the HAS_GETGRENT_R symbol,
961 which indicates to the C program that the getgrent_r()
962 routine is available.
964 d_getgrgid_r (d_getgrgid_r.U):
965 This variable conditionally defines the HAS_GETGRGID_R symbol,
966 which indicates to the C program that the getgrgid_r()
967 routine is available.
969 d_getgrnam_r (d_getgrnam_r.U):
970 This variable conditionally defines the HAS_GETGRNAM_R symbol,
971 which indicates to the C program that the getgrnam_r()
972 routine is available.
974 d_getgrps (d_getgrps.U):
975 This variable conditionally defines the HAS_GETGROUPS symbol, which
976 indicates to the C program that the getgroups() routine is available
977 to get the list of process groups.
979 d_gethbyaddr (d_gethbyad.U):
980 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
981 indicates to the C program that the gethostbyaddr() routine is available
982 to look up hosts by their IP addresses.
984 d_gethbyname (d_gethbynm.U):
985 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
986 indicates to the C program that the gethostbyname() routine is available
987 to look up host names in some data base or other.
989 d_gethent (d_gethent.U):
990 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
991 available to look up host names in some data base or another.
993 d_gethname (d_gethname.U):
994 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
995 indicates to the C program that the gethostname() routine may be
996 used to derive the host name.
998 d_gethostbyaddr_r (d_gethostbyaddr_r.U):
999 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
1000 which indicates to the C program that the gethostbyaddr_r()
1001 routine is available.
1003 d_gethostbyname_r (d_gethostbyname_r.U):
1004 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
1005 which indicates to the C program that the gethostbyname_r()
1006 routine is available.
1008 d_gethostent_r (d_gethostent_r.U):
1009 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
1010 which indicates to the C program that the gethostent_r()
1011 routine is available.
1013 d_gethostprotos (d_gethostprotos.U):
1014 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
1015 which indicates to the C program that <netdb.h> supplies
1016 prototypes for the various gethost*() functions.
1017 See also netdbtype.U for probing for various netdb types.
1019 d_getitimer (d_getitimer.U):
1020 This variable conditionally defines the HAS_GETITIMER symbol, which
1021 indicates to the C program that the getitimer() routine is available.
1023 d_getlogin (d_getlogin.U):
1024 This variable conditionally defines the HAS_GETLOGIN symbol, which
1025 indicates to the C program that the getlogin() routine is available
1026 to get the login name.
1028 d_getlogin_r (d_getlogin_r.U):
1029 This variable conditionally defines the HAS_GETLOGIN_R symbol,
1030 which indicates to the C program that the getlogin_r()
1031 routine is available.
1033 d_getmnt (d_getmnt.U):
1034 This variable conditionally defines the HAS_GETMNT symbol, which
1035 indicates to the C program that the getmnt() routine is available
1036 to retrieve one or more mount info blocks by filename.
1038 d_getmntent (d_getmntent.U):
1039 This variable conditionally defines the HAS_GETMNTENT symbol, which
1040 indicates to the C program that the getmntent() routine is available
1041 to iterate through mounted files to get their mount info.
1043 d_getnameinfo (d_getnameinfo.U):
1044 This variable conditionally defines the HAS_GETNAMEINFO symbol,
1045 which indicates to the C program that the getnameinfo() function
1048 d_getnbyaddr (d_getnbyad.U):
1049 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
1050 indicates to the C program that the getnetbyaddr() routine is available
1051 to look up networks by their IP addresses.
1053 d_getnbyname (d_getnbynm.U):
1054 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
1055 indicates to the C program that the getnetbyname() routine is available
1056 to look up networks by their names.
1058 d_getnent (d_getnent.U):
1059 This variable conditionally defines HAS_GETNETENT if getnetent() is
1060 available to look up network names in some data base or another.
1062 d_getnetbyaddr_r (d_getnetbyaddr_r.U):
1063 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
1064 which indicates to the C program that the getnetbyaddr_r()
1065 routine is available.
1067 d_getnetbyname_r (d_getnetbyname_r.U):
1068 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
1069 which indicates to the C program that the getnetbyname_r()
1070 routine is available.
1072 d_getnetent_r (d_getnetent_r.U):
1073 This variable conditionally defines the HAS_GETNETENT_R symbol,
1074 which indicates to the C program that the getnetent_r()
1075 routine is available.
1077 d_getnetprotos (d_getnetprotos.U):
1078 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1079 which indicates to the C program that <netdb.h> supplies
1080 prototypes for the various getnet*() functions.
1081 See also netdbtype.U for probing for various netdb types.
1083 d_getpagsz (d_getpagsz.U):
1084 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1085 is available to get the system page size.
1087 d_getpbyname (d_getprotby.U):
1088 This variable conditionally defines the HAS_GETPROTOBYNAME
1089 symbol, which indicates to the C program that the
1090 getprotobyname() routine is available to look up protocols
1093 d_getpbynumber (d_getprotby.U):
1094 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1095 symbol, which indicates to the C program that the
1096 getprotobynumber() routine is available to look up protocols
1099 d_getpent (d_getpent.U):
1100 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1101 available to look up protocols in some data base or another.
1103 d_getpgid (d_getpgid.U):
1104 This variable conditionally defines the HAS_GETPGID symbol, which
1105 indicates to the C program that the getpgid(pid) function
1106 is available to get the process group id.
1108 d_getpgrp (d_getpgrp.U):
1109 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1110 available to get the current process group.
1112 d_getpgrp2 (d_getpgrp2.U):
1113 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1114 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1115 is available to get the current process group.
1117 d_getppid (d_getppid.U):
1118 This variable conditionally defines the HAS_GETPPID symbol, which
1119 indicates to the C program that the getppid() routine is available
1120 to get the parent process ID.
1122 d_getprior (d_getprior.U):
1123 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1124 is available to get a process's priority.
1126 d_getprotobyname_r (d_getprotobyname_r.U):
1127 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1128 which indicates to the C program that the getprotobyname_r()
1129 routine is available.
1131 d_getprotobynumber_r (d_getprotobynumber_r.U):
1132 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1133 which indicates to the C program that the getprotobynumber_r()
1134 routine is available.
1136 d_getprotoent_r (d_getprotoent_r.U):
1137 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1138 which indicates to the C program that the getprotoent_r()
1139 routine is available.
1141 d_getprotoprotos (d_getprotoprotos.U):
1142 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1143 which indicates to the C program that <netdb.h> supplies
1144 prototypes for the various getproto*() functions.
1145 See also netdbtype.U for probing for various netdb types.
1147 d_getprpwnam (d_getprpwnam.U):
1148 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1149 available to retrieve protected (shadow) password entries by name.
1151 d_getpwent (d_getpwent.U):
1152 This variable conditionally defines the HAS_GETPWENT symbol, which
1153 indicates to the C program that the getpwent() routine is available
1154 for sequential access of the passwd database.
1156 d_getpwent_r (d_getpwent_r.U):
1157 This variable conditionally defines the HAS_GETPWENT_R symbol,
1158 which indicates to the C program that the getpwent_r()
1159 routine is available.
1161 d_getpwnam_r (d_getpwnam_r.U):
1162 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1163 which indicates to the C program that the getpwnam_r()
1164 routine is available.
1166 d_getpwuid_r (d_getpwuid_r.U):
1167 This variable conditionally defines the HAS_GETPWUID_R symbol,
1168 which indicates to the C program that the getpwuid_r()
1169 routine is available.
1171 d_getsbyname (d_getsrvby.U):
1172 This variable conditionally defines the HAS_GETSERVBYNAME
1173 symbol, which indicates to the C program that the
1174 getservbyname() routine is available to look up services
1177 d_getsbyport (d_getsrvby.U):
1178 This variable conditionally defines the HAS_GETSERVBYPORT
1179 symbol, which indicates to the C program that the
1180 getservbyport() routine is available to look up services
1183 d_getsent (d_getsent.U):
1184 This variable conditionally defines HAS_GETSERVENT if getservent() is
1185 available to look up network services in some data base or another.
1187 d_getservbyname_r (d_getservbyname_r.U):
1188 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1189 which indicates to the C program that the getservbyname_r()
1190 routine is available.
1192 d_getservbyport_r (d_getservbyport_r.U):
1193 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1194 which indicates to the C program that the getservbyport_r()
1195 routine is available.
1197 d_getservent_r (d_getservent_r.U):
1198 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1199 which indicates to the C program that the getservent_r()
1200 routine is available.
1202 d_getservprotos (d_getservprotos.U):
1203 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1204 which indicates to the C program that <netdb.h> supplies
1205 prototypes for the various getserv*() functions.
1206 See also netdbtype.U for probing for various netdb types.
1208 d_getspnam (d_getspnam.U):
1209 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1210 available to retrieve SysV shadow password entries by name.
1212 d_getspnam_r (d_getspnam_r.U):
1213 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1214 which indicates to the C program that the getspnam_r()
1215 routine is available.
1217 d_gettimeod (d_ftime.U):
1218 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1219 indicates that the gettimeofday() system call exists (to obtain a
1220 sub-second accuracy clock). You should probably include <sys/resource.h>.
1222 d_gmtime64 (d_timefuncs64.U):
1223 This variable conditionally defines the HAS_GMTIME64 symbol, which
1224 indicates to the C program that the gmtime64 () routine is available.
1226 d_gmtime_r (d_gmtime_r.U):
1227 This variable conditionally defines the HAS_GMTIME_R symbol,
1228 which indicates to the C program that the gmtime_r()
1229 routine is available.
1231 d_gnulibc (d_gnulibc.U):
1232 Defined if we're dealing with the GNU C Library.
1234 d_grpasswd (i_grp.U):
1235 This variable conditionally defines GRPASSWD, which indicates
1236 that struct group in <grp.h> contains gr_passwd.
1238 d_hasmntopt (d_hasmntopt.U):
1239 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1240 indicates to the C program that the hasmntopt() routine is available
1241 to query the mount options of file systems.
1243 d_htonl (d_htonl.U):
1244 This variable conditionally defines HAS_HTONL if htonl() and its
1245 friends are available to do network order byte swapping.
1247 d_ilogbl (d_ilogbl.U):
1248 This variable conditionally defines the HAS_ILOGBL symbol, which
1249 indicates to the C program that the ilogbl() routine is available.
1250 If scalbnl is also present we can emulate frexpl.
1252 d_inc_version_list (inc_version_list.U):
1253 This variable conditionally defines PERL_INC_VERSION_LIST.
1254 It is set to undef when PERL_INC_VERSION_LIST is empty.
1256 d_index (d_strchr.U):
1257 This variable conditionally defines HAS_INDEX if index() and
1258 rindex() are available for string searching.
1260 d_inetaton (d_inetaton.U):
1261 This variable conditionally defines the HAS_INET_ATON symbol, which
1262 indicates to the C program that the inet_aton() function is available
1263 to parse IP address "dotted-quad" strings.
1265 d_inetntop (d_inetntop.U):
1266 This variable conditionally defines the HAS_INETNTOP symbol,
1267 which indicates to the C program that the inet_ntop() function
1270 d_inetpton (d_inetpton.U):
1271 This variable conditionally defines the HAS_INETPTON symbol,
1272 which indicates to the C program that the inet_pton() function
1275 d_int64_t (d_int64_t.U):
1276 This symbol will be defined if the C compiler supports int64_t.
1278 d_ip_mreq (d_socket.U):
1279 This variable conditionally defines the HAS_IP_MREQ symbol, which
1280 indicates the availability of a struct ip_mreq.
1282 d_ip_mreq_source (d_socket.U):
1283 This variable conditionally defines the HAS_IP_MREQ_SOURCE symbol,
1284 which indicates the availability of a struct ip_mreq_source.
1286 d_ipv6_mreq (d_socket.U):
1287 This variable conditionally defines the HAS_IPV6_MREQ symbol, which
1288 indicates the availability of a struct ipv6_mreq.
1290 d_ipv6_mreq_source (d_socket.U):
1291 This variable conditionally defines the HAS_IPV6_MREQ_SOURCE symbol,
1292 which indicates the availability of a struct ipv6_mreq_source.
1294 d_isascii (d_isascii.U):
1295 This variable conditionally defines the HAS_ISASCII constant,
1296 which indicates to the C program that isascii() is available.
1298 d_isblank (d_isblank.U):
1299 This variable conditionally defines the HAS_ISBLANK constant,
1300 which indicates to the C program that isblank() is available.
1302 d_isfinite (d_isfinite.U):
1303 This variable conditionally defines the HAS_ISFINITE symbol, which
1304 indicates to the C program that the isfinite() routine is available.
1306 d_isinf (d_isinf.U):
1307 This variable conditionally defines the HAS_ISINF symbol, which
1308 indicates to the C program that the isinf() routine is available.
1310 d_isnan (d_isnan.U):
1311 This variable conditionally defines the HAS_ISNAN symbol, which
1312 indicates to the C program that the isnan() routine is available.
1314 d_isnanl (d_isnanl.U):
1315 This variable conditionally defines the HAS_ISNANL symbol, which
1316 indicates to the C program that the isnanl() routine is available.
1318 d_killpg (d_killpg.U):
1319 This variable conditionally defines the HAS_KILLPG symbol, which
1320 indicates to the C program that the killpg() routine is available
1321 to kill process groups.
1323 d_lchown (d_lchown.U):
1324 This variable conditionally defines the HAS_LCHOWN symbol, which
1325 indicates to the C program that the lchown() routine is available
1326 to operate on a symbolic link (instead of following the link).
1328 d_ldbl_dig (d_ldbl_dig.U):
1329 This variable conditionally defines d_ldbl_dig if this system's
1330 header files provide LDBL_DIG, which is the number of significant
1331 digits in a long double precision number.
1333 d_libm_lib_version (d_libm_lib_version.U):
1334 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1335 which indicates to the C program that math.h defines _LIB_VERSION
1336 being available in libm
1338 d_libname_unique (so.U):
1339 This variable is defined if the target system insists on unique
1340 basenames for shared library files. This is currently true on Android,
1341 false everywhere else we know of.
1342 Defaults to 'undef'.
1345 This variable conditionally defines HAS_LINK if link() is
1346 available to create hard links.
1348 d_localtime64 (d_timefuncs64.U):
1349 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1350 indicates to the C program that the localtime64 () routine is available.
1352 d_localtime_r (d_localtime_r.U):
1353 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1354 which indicates to the C program that the localtime_r()
1355 routine is available.
1357 d_localtime_r_needs_tzset (d_localtime_r.U):
1358 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1359 symbol, which makes us call tzset before localtime_r()
1361 d_locconv (d_locconv.U):
1362 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1363 available for numeric and monetary formatting conventions.
1365 d_lockf (d_lockf.U):
1366 This variable conditionally defines HAS_LOCKF if lockf() is
1367 available to do file locking.
1369 d_longdbl (d_longdbl.U):
1370 This variable conditionally defines HAS_LONG_DOUBLE if
1371 the long double type is supported.
1373 d_longlong (d_longlong.U):
1374 This variable conditionally defines HAS_LONG_LONG if
1375 the long long type is supported.
1377 d_lseekproto (d_lseekproto.U):
1378 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1379 which indicates to the C program that the system provides
1380 a prototype for the lseek() function. Otherwise, it is
1381 up to the program to supply one.
1383 d_lstat (d_lstat.U):
1384 This variable conditionally defines HAS_LSTAT if lstat() is
1385 available to do file stats on symbolic links.
1387 d_madvise (d_madvise.U):
1388 This variable conditionally defines HAS_MADVISE if madvise() is
1389 available to map a file into memory.
1391 d_malloc_good_size (d_malloc_size.U):
1392 This symbol, if defined, indicates that the malloc_good_size
1393 routine is available for use.
1395 d_malloc_size (d_malloc_size.U):
1396 This symbol, if defined, indicates that the malloc_size
1397 routine is available for use.
1399 d_mblen (d_mblen.U):
1400 This variable conditionally defines the HAS_MBLEN symbol, which
1401 indicates to the C program that the mblen() routine is available
1402 to find the number of bytes in a multibye character.
1404 d_mbstowcs (d_mbstowcs.U):
1405 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1406 indicates to the C program that the mbstowcs() routine is available
1407 to convert a multibyte string into a wide character string.
1409 d_mbtowc (d_mbtowc.U):
1410 This variable conditionally defines the HAS_MBTOWC symbol, which
1411 indicates to the C program that the mbtowc() routine is available
1412 to convert multibyte to a wide character.
1414 d_memchr (d_memchr.U):
1415 This variable conditionally defines the HAS_MEMCHR symbol, which
1416 indicates to the C program that the memchr() routine is available
1417 to locate characters within a C string.
1419 d_memcmp (d_memcmp.U):
1420 This variable conditionally defines the HAS_MEMCMP symbol, which
1421 indicates to the C program that the memcmp() routine is available
1422 to compare blocks of memory.
1424 d_memcpy (d_memcpy.U):
1425 This variable conditionally defines the HAS_MEMCPY symbol, which
1426 indicates to the C program that the memcpy() routine is available
1427 to copy blocks of memory.
1429 d_memmove (d_memmove.U):
1430 This variable conditionally defines the HAS_MEMMOVE symbol, which
1431 indicates to the C program that the memmove() routine is available
1432 to copy potentially overlapping blocks of memory.
1434 d_memset (d_memset.U):
1435 This variable conditionally defines the HAS_MEMSET symbol, which
1436 indicates to the C program that the memset() routine is available
1437 to set blocks of memory.
1439 d_mkdir (d_mkdir.U):
1440 This variable conditionally defines the HAS_MKDIR symbol, which
1441 indicates to the C program that the mkdir() routine is available
1442 to create directories..
1444 d_mkdtemp (d_mkdtemp.U):
1445 This variable conditionally defines the HAS_MKDTEMP symbol, which
1446 indicates to the C program that the mkdtemp() routine is available
1447 to exclusively create a uniquely named temporary directory.
1449 d_mkfifo (d_mkfifo.U):
1450 This variable conditionally defines the HAS_MKFIFO symbol, which
1451 indicates to the C program that the mkfifo() routine is available.
1453 d_mkstemp (d_mkstemp.U):
1454 This variable conditionally defines the HAS_MKSTEMP symbol, which
1455 indicates to the C program that the mkstemp() routine is available
1456 to exclusively create and open a uniquely named temporary file.
1458 d_mkstemps (d_mkstemps.U):
1459 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1460 indicates to the C program that the mkstemps() routine is available
1461 to exclusively create and open a uniquely named (with a suffix)
1464 d_mktime (d_mktime.U):
1465 This variable conditionally defines the HAS_MKTIME symbol, which
1466 indicates to the C program that the mktime() routine is available.
1468 d_mktime64 (d_timefuncs64.U):
1469 This variable conditionally defines the HAS_MKTIME64 symbol, which
1470 indicates to the C program that the mktime64 () routine is available.
1473 This variable conditionally defines HAS_MMAP if mmap() is
1474 available to map a file into memory.
1476 d_modfl (d_modfl.U):
1477 This variable conditionally defines the HAS_MODFL symbol, which
1478 indicates to the C program that the modfl() routine is available.
1480 d_modfl_pow32_bug (d_modfl.U):
1481 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1482 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1483 For example from 4294967303.150000 one would get 4294967302.000000
1484 and 1.150000. The bug has been seen in certain versions of glibc,
1485 release 2.2.2 is known to be okay.
1487 d_modflproto (d_modfl.U):
1488 This symbol, if defined, indicates that the system provides
1489 a prototype for the modfl() function. Otherwise, it is up
1490 to the program to supply one. C99 says it should be
1491 long double modfl(long double, long double *);
1493 d_mprotect (d_mprotect.U):
1494 This variable conditionally defines HAS_MPROTECT if mprotect() is
1495 available to modify the access protection of a memory mapped file.
1498 This variable conditionally defines the HAS_MSG symbol, which
1499 indicates that the entire msg*(2) library is present.
1501 d_msg_ctrunc (d_socket.U):
1502 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1503 which indicates that the MSG_CTRUNC is available. #ifdef is
1504 not enough because it may be an enum, glibc has been known to do this.
1506 d_msg_dontroute (d_socket.U):
1507 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1508 which indicates that the MSG_DONTROUTE is available. #ifdef is
1509 not enough because it may be an enum, glibc has been known to do this.
1511 d_msg_oob (d_socket.U):
1512 This variable conditionally defines the HAS_MSG_OOB symbol,
1513 which indicates that the MSG_OOB is available. #ifdef is
1514 not enough because it may be an enum, glibc has been known to do this.
1516 d_msg_peek (d_socket.U):
1517 This variable conditionally defines the HAS_MSG_PEEK symbol,
1518 which indicates that the MSG_PEEK is available. #ifdef is
1519 not enough because it may be an enum, glibc has been known to do this.
1521 d_msg_proxy (d_socket.U):
1522 This variable conditionally defines the HAS_MSG_PROXY symbol,
1523 which indicates that the MSG_PROXY is available. #ifdef is
1524 not enough because it may be an enum, glibc has been known to do this.
1526 d_msgctl (d_msgctl.U):
1527 This variable conditionally defines the HAS_MSGCTL symbol, which
1528 indicates to the C program that the msgctl() routine is available.
1530 d_msgget (d_msgget.U):
1531 This variable conditionally defines the HAS_MSGGET symbol, which
1532 indicates to the C program that the msgget() routine is available.
1534 d_msghdr_s (d_msghdr_s.U):
1535 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1536 which indicates that the struct msghdr is supported.
1538 d_msgrcv (d_msgrcv.U):
1539 This variable conditionally defines the HAS_MSGRCV symbol, which
1540 indicates to the C program that the msgrcv() routine is available.
1542 d_msgsnd (d_msgsnd.U):
1543 This variable conditionally defines the HAS_MSGSND symbol, which
1544 indicates to the C program that the msgsnd() routine is available.
1546 d_msync (d_msync.U):
1547 This variable conditionally defines HAS_MSYNC if msync() is
1548 available to synchronize a mapped file.
1550 d_munmap (d_munmap.U):
1551 This variable conditionally defines HAS_MUNMAP if munmap() is
1552 available to unmap a region mapped by mmap().
1554 d_mymalloc (mallocsrc.U):
1555 This variable conditionally defines MYMALLOC in case other parts
1556 of the source want to take special action if MYMALLOC is used.
1557 This may include different sorts of profiling or error detection.
1560 This variable conditionally defines the HAS_NDBM symbol, which
1561 indicates that both the ndbm.h include file and an appropriate ndbm
1562 library exist. Consult the different i_*ndbm variables
1563 to find out the actual include location. Sometimes, a system has the
1564 header file but not the library. This variable will only be set if
1565 the system has both.
1567 d_ndbm_h_uses_prototypes (i_ndbm.U):
1568 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1569 which indicates that the ndbm.h include file uses real ANSI C
1570 prototypes instead of K&R style function declarations. K&R style
1571 declarations are unsupported in C++, so the include file requires
1572 special handling when using a C++ compiler and this variable is
1573 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1574 to get the same information for alternative ndbm.h include files.
1577 This variable conditionally defines the HAS_NICE symbol, which
1578 indicates to the C program that the nice() routine is available.
1580 d_nl_langinfo (d_nl_langinfo.U):
1581 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1582 indicates to the C program that the nl_langinfo() routine is available.
1584 d_nv_preserves_uv (perlxv.U):
1585 This variable indicates whether a variable of type nvtype
1586 can preserve all the bits a variable of type uvtype.
1588 d_nv_zero_is_allbits_zero (perlxv.U):
1589 This variable indicates whether a variable of type nvtype
1590 stores 0.0 in memory as all bits zero.
1592 d_off64_t (d_off64_t.U):
1593 This symbol will be defined if the C compiler supports off64_t.
1595 d_old_pthread_create_joinable (d_pthrattrj.U):
1596 This variable conditionally defines pthread_create_joinable.
1597 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1599 d_oldpthreads (usethreads.U):
1600 This variable conditionally defines the OLD_PTHREADS_API symbol,
1601 and indicates that Perl should be built to use the old
1602 draft POSIX threads API. This is only potentially meaningful if
1605 d_oldsock (d_socket.U):
1606 This variable conditionally defines the OLDSOCKET symbol, which
1607 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1609 d_open3 (d_open3.U):
1610 This variable conditionally defines the HAS_OPEN3 manifest constant,
1611 which indicates to the C program that the 3 argument version of
1612 the open(2) function is available.
1614 d_pathconf (d_pathconf.U):
1615 This variable conditionally defines the HAS_PATHCONF symbol, which
1616 indicates to the C program that the pathconf() routine is available
1617 to determine file-system related limits and options associated
1618 with a given filename.
1620 d_pause (d_pause.U):
1621 This variable conditionally defines the HAS_PAUSE symbol, which
1622 indicates to the C program that the pause() routine is available
1623 to suspend a process until a signal is received.
1625 d_perl_otherlibdirs (otherlibdirs.U):
1626 This variable conditionally defines PERL_OTHERLIBDIRS, which
1627 contains a colon-separated set of paths for the perl binary to
1628 include in @INC. See also otherlibdirs.
1630 d_phostname (d_gethname.U):
1631 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1632 contains the shell command which, when fed to popen(), may be
1633 used to derive the host name.
1636 This variable conditionally defines the HAS_PIPE symbol, which
1637 indicates to the C program that the pipe() routine is available
1638 to create an inter-process channel.
1641 This variable conditionally defines the HAS_POLL symbol, which
1642 indicates to the C program that the poll() routine is available
1643 to poll active file descriptors.
1645 d_portable (d_portable.U):
1646 This variable conditionally defines the PORTABLE symbol, which
1647 indicates to the C program that it should not assume that it is
1648 running on the machine it was compiled on.
1650 d_prctl (d_prctl.U):
1651 This variable conditionally defines the HAS_PRCTL symbol, which
1652 indicates to the C program that the prctl() routine is available.
1654 d_prctl_set_name (d_prctl.U):
1655 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
1656 which indicates to the C program that the prctl() routine supports
1657 the PR_SET_NAME option.
1659 d_PRId64 (quadfio.U):
1660 This variable conditionally defines the PERL_PRId64 symbol, which
1661 indicates that stdio has a symbol to print 64-bit decimal numbers.
1663 d_PRIeldbl (longdblfio.U):
1664 This variable conditionally defines the PERL_PRIfldbl symbol, which
1665 indicates that stdio has a symbol to print long doubles.
1667 d_PRIEUldbl (longdblfio.U):
1668 This variable conditionally defines the PERL_PRIfldbl symbol, which
1669 indicates that stdio has a symbol to print long doubles.
1670 The 'U' in the name is to separate this from d_PRIeldbl so that even
1671 case-blind systems can see the difference.
1673 d_PRIfldbl (longdblfio.U):
1674 This variable conditionally defines the PERL_PRIfldbl symbol, which
1675 indicates that stdio has a symbol to print long doubles.
1677 d_PRIFUldbl (longdblfio.U):
1678 This variable conditionally defines the PERL_PRIfldbl symbol, which
1679 indicates that stdio has a symbol to print long doubles.
1680 The 'U' in the name is to separate this from d_PRIfldbl so that even
1681 case-blind systems can see the difference.
1683 d_PRIgldbl (longdblfio.U):
1684 This variable conditionally defines the PERL_PRIfldbl symbol, which
1685 indicates that stdio has a symbol to print long doubles.
1687 d_PRIGUldbl (longdblfio.U):
1688 This variable conditionally defines the PERL_PRIfldbl symbol, which
1689 indicates that stdio has a symbol to print long doubles.
1690 The 'U' in the name is to separate this from d_PRIgldbl so that even
1691 case-blind systems can see the difference.
1693 d_PRIi64 (quadfio.U):
1694 This variable conditionally defines the PERL_PRIi64 symbol, which
1695 indicates that stdio has a symbol to print 64-bit decimal numbers.
1697 d_printf_format_null (d_attribut.U):
1698 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1699 indicates the C compiler allows printf-like formats to be null.
1701 d_PRIo64 (quadfio.U):
1702 This variable conditionally defines the PERL_PRIo64 symbol, which
1703 indicates that stdio has a symbol to print 64-bit octal numbers.
1705 d_PRIu64 (quadfio.U):
1706 This variable conditionally defines the PERL_PRIu64 symbol, which
1707 indicates that stdio has a symbol to print 64-bit unsigned decimal
1710 d_PRIx64 (quadfio.U):
1711 This variable conditionally defines the PERL_PRIx64 symbol, which
1712 indicates that stdio has a symbol to print 64-bit hexadecimal numbers.
1714 d_PRIXU64 (quadfio.U):
1715 This variable conditionally defines the PERL_PRIXU64 symbol, which
1716 indicates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1717 The 'U' in the name is to separate this from d_PRIx64 so that even
1718 case-blind systems can see the difference.
1720 d_procselfexe (d_procselfexe.U):
1721 Defined if $procselfexe is symlink to the absolute
1722 pathname of the executing program.
1724 d_pseudofork (d_vfork.U):
1725 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1726 which indicates that an emulation of the fork routine is available.
1728 d_pthread_atfork (d_pthread_atfork.U):
1729 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1730 which indicates to the C program that the pthread_atfork()
1731 routine is available.
1733 d_pthread_attr_setscope (d_pthread_attr_ss.U):
1734 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1735 pthread_attr_setscope() is available to set the contention scope
1736 attribute of a thread attribute object.
1738 d_pthread_yield (d_pthread_y.U):
1739 This variable conditionally defines the HAS_PTHREAD_YIELD
1740 symbol if the pthread_yield routine is available to yield
1741 the execution of the current thread.
1744 This variable conditionally defines PWAGE, which indicates
1745 that struct passwd contains pw_age.
1747 d_pwchange (i_pwd.U):
1748 This variable conditionally defines PWCHANGE, which indicates
1749 that struct passwd contains pw_change.
1751 d_pwclass (i_pwd.U):
1752 This variable conditionally defines PWCLASS, which indicates
1753 that struct passwd contains pw_class.
1755 d_pwcomment (i_pwd.U):
1756 This variable conditionally defines PWCOMMENT, which indicates
1757 that struct passwd contains pw_comment.
1759 d_pwexpire (i_pwd.U):
1760 This variable conditionally defines PWEXPIRE, which indicates
1761 that struct passwd contains pw_expire.
1763 d_pwgecos (i_pwd.U):
1764 This variable conditionally defines PWGECOS, which indicates
1765 that struct passwd contains pw_gecos.
1767 d_pwpasswd (i_pwd.U):
1768 This variable conditionally defines PWPASSWD, which indicates
1769 that struct passwd contains pw_passwd.
1771 d_pwquota (i_pwd.U):
1772 This variable conditionally defines PWQUOTA, which indicates
1773 that struct passwd contains pw_quota.
1775 d_qgcvt (d_qgcvt.U):
1776 This variable conditionally defines the HAS_QGCVT symbol, which
1777 indicates to the C program that the qgcvt() routine is available.
1779 d_quad (quadtype.U):
1780 This variable, if defined, tells that there's a 64-bit integer type,
1783 d_random_r (d_random_r.U):
1784 This variable conditionally defines the HAS_RANDOM_R symbol,
1785 which indicates to the C program that the random_r()
1786 routine is available.
1788 d_readdir (d_readdir.U):
1789 This variable conditionally defines HAS_READDIR if readdir() is
1790 available to read directory entries.
1792 d_readdir64_r (d_readdir64_r.U):
1793 This variable conditionally defines the HAS_READDIR64_R symbol,
1794 which indicates to the C program that the readdir64_r()
1795 routine is available.
1797 d_readdir_r (d_readdir_r.U):
1798 This variable conditionally defines the HAS_READDIR_R symbol,
1799 which indicates to the C program that the readdir_r()
1800 routine is available.
1802 d_readlink (d_readlink.U):
1803 This variable conditionally defines the HAS_READLINK symbol, which
1804 indicates to the C program that the readlink() routine is available
1805 to read the value of a symbolic link.
1807 d_readv (d_readv.U):
1808 This variable conditionally defines the HAS_READV symbol, which
1809 indicates to the C program that the readv() routine is available.
1811 d_recvmsg (d_recvmsg.U):
1812 This variable conditionally defines the HAS_RECVMSG symbol, which
1813 indicates to the C program that the recvmsg() routine is available.
1815 d_rename (d_rename.U):
1816 This variable conditionally defines the HAS_RENAME symbol, which
1817 indicates to the C program that the rename() routine is available
1820 d_rewinddir (d_readdir.U):
1821 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1824 d_rmdir (d_rmdir.U):
1825 This variable conditionally defines HAS_RMDIR if rmdir() is
1826 available to remove directories.
1828 d_safebcpy (d_safebcpy.U):
1829 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1830 the bcopy() routine can do overlapping copies. Normally, you
1831 should probably use memmove().
1833 d_safemcpy (d_safemcpy.U):
1834 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1835 the memcpy() routine can do overlapping copies.
1836 For overlapping copies, memmove() should be used, if available.
1838 d_sanemcmp (d_sanemcmp.U):
1839 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1840 the memcpy() routine is available and can be used to compare relative
1841 magnitudes of chars with their high bits set.
1843 d_sbrkproto (d_sbrkproto.U):
1844 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1845 which indicates to the C program that the system provides
1846 a prototype for the sbrk() function. Otherwise, it is
1847 up to the program to supply one.
1849 d_scalbnl (d_scalbnl.U):
1850 This variable conditionally defines the HAS_SCALBNL symbol, which
1851 indicates to the C program that the scalbnl() routine is available.
1852 If ilogbl is also present we can emulate frexpl.
1854 d_sched_yield (d_pthread_y.U):
1855 This variable conditionally defines the HAS_SCHED_YIELD
1856 symbol if the sched_yield routine is available to yield
1857 the execution of the current thread.
1859 d_scm_rights (d_socket.U):
1860 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1861 which indicates that the SCM_RIGHTS is available. #ifdef is
1862 not enough because it may be an enum, glibc has been known to do this.
1864 d_SCNfldbl (longdblfio.U):
1865 This variable conditionally defines the PERL_PRIfldbl symbol, which
1866 indicates that stdio has a symbol to scan long doubles.
1868 d_seekdir (d_readdir.U):
1869 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1872 d_select (d_select.U):
1873 This variable conditionally defines HAS_SELECT if select() is
1874 available to select active file descriptors. A <sys/time.h>
1875 inclusion may be necessary for the timeout field.
1878 This variable conditionally defines the HAS_SEM symbol, which
1879 indicates that the entire sem*(2) library is present.
1881 d_semctl (d_semctl.U):
1882 This variable conditionally defines the HAS_SEMCTL symbol, which
1883 indicates to the C program that the semctl() routine is available.
1885 d_semctl_semid_ds (d_union_semun.U):
1886 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1887 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1889 d_semctl_semun (d_union_semun.U):
1890 This variable conditionally defines USE_SEMCTL_SEMUN, which
1891 indicates that union semun is to be used for semctl IPC_STAT.
1893 d_semget (d_semget.U):
1894 This variable conditionally defines the HAS_SEMGET symbol, which
1895 indicates to the C program that the semget() routine is available.
1897 d_semop (d_semop.U):
1898 This variable conditionally defines the HAS_SEMOP symbol, which
1899 indicates to the C program that the semop() routine is available.
1901 d_sendmsg (d_sendmsg.U):
1902 This variable conditionally defines the HAS_SENDMSG symbol, which
1903 indicates to the C program that the sendmsg() routine is available.
1905 d_setegid (d_setegid.U):
1906 This variable conditionally defines the HAS_SETEGID symbol, which
1907 indicates to the C program that the setegid() routine is available
1908 to change the effective gid of the current program.
1910 d_seteuid (d_seteuid.U):
1911 This variable conditionally defines the HAS_SETEUID symbol, which
1912 indicates to the C program that the seteuid() routine is available
1913 to change the effective uid of the current program.
1915 d_setgrent (d_setgrent.U):
1916 This variable conditionally defines the HAS_SETGRENT symbol, which
1917 indicates to the C program that the setgrent() routine is available
1918 for initializing sequential access to the group database.
1920 d_setgrent_r (d_setgrent_r.U):
1921 This variable conditionally defines the HAS_SETGRENT_R symbol,
1922 which indicates to the C program that the setgrent_r()
1923 routine is available.
1925 d_setgrps (d_setgrps.U):
1926 This variable conditionally defines the HAS_SETGROUPS symbol, which
1927 indicates to the C program that the setgroups() routine is available
1928 to set the list of process groups.
1930 d_sethent (d_sethent.U):
1931 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1934 d_sethostent_r (d_sethostent_r.U):
1935 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1936 which indicates to the C program that the sethostent_r()
1937 routine is available.
1939 d_setitimer (d_setitimer.U):
1940 This variable conditionally defines the HAS_SETITIMER symbol, which
1941 indicates to the C program that the setitimer() routine is available.
1943 d_setlinebuf (d_setlnbuf.U):
1944 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1945 indicates to the C program that the setlinebuf() routine is available
1946 to change stderr or stdout from block-buffered or unbuffered to a
1949 d_setlocale (d_setlocale.U):
1950 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1951 available to handle locale-specific ctype implementations.
1953 d_setlocale_r (d_setlocale_r.U):
1954 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1955 which indicates to the C program that the setlocale_r()
1956 routine is available.
1958 d_setnent (d_setnent.U):
1959 This variable conditionally defines HAS_SETNETENT if setnetent() is
1962 d_setnetent_r (d_setnetent_r.U):
1963 This variable conditionally defines the HAS_SETNETENT_R symbol,
1964 which indicates to the C program that the setnetent_r()
1965 routine is available.
1967 d_setpent (d_setpent.U):
1968 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1971 d_setpgid (d_setpgid.U):
1972 This variable conditionally defines the HAS_SETPGID symbol if the
1973 setpgid(pid, gpid) function is available to set process group ID.
1975 d_setpgrp (d_setpgrp.U):
1976 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1977 available to set the current process group.
1979 d_setpgrp2 (d_setpgrp2.U):
1980 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1981 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1982 is available to set the current process group.
1984 d_setprior (d_setprior.U):
1985 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1986 is available to set a process's priority.
1988 d_setproctitle (d_setproctitle.U):
1989 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1990 which indicates to the C program that the setproctitle() routine
1993 d_setprotoent_r (d_setprotoent_r.U):
1994 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1995 which indicates to the C program that the setprotoent_r()
1996 routine is available.
1998 d_setpwent (d_setpwent.U):
1999 This variable conditionally defines the HAS_SETPWENT symbol, which
2000 indicates to the C program that the setpwent() routine is available
2001 for initializing sequential access to the passwd database.
2003 d_setpwent_r (d_setpwent_r.U):
2004 This variable conditionally defines the HAS_SETPWENT_R symbol,
2005 which indicates to the C program that the setpwent_r()
2006 routine is available.
2008 d_setregid (d_setregid.U):
2009 This variable conditionally defines HAS_SETREGID if setregid() is
2010 available to change the real and effective gid of the current
2013 d_setresgid (d_setregid.U):
2014 This variable conditionally defines HAS_SETRESGID if setresgid() is
2015 available to change the real, effective and saved gid of the current
2018 d_setresuid (d_setreuid.U):
2019 This variable conditionally defines HAS_SETREUID if setresuid() is
2020 available to change the real, effective and saved uid of the current
2023 d_setreuid (d_setreuid.U):
2024 This variable conditionally defines HAS_SETREUID if setreuid() is
2025 available to change the real and effective uid of the current
2028 d_setrgid (d_setrgid.U):
2029 This variable conditionally defines the HAS_SETRGID symbol, which
2030 indicates to the C program that the setrgid() routine is available
2031 to change the real gid of the current program.
2033 d_setruid (d_setruid.U):
2034 This variable conditionally defines the HAS_SETRUID symbol, which
2035 indicates to the C program that the setruid() routine is available
2036 to change the real uid of the current program.
2038 d_setsent (d_setsent.U):
2039 This variable conditionally defines HAS_SETSERVENT if setservent() is
2042 d_setservent_r (d_setservent_r.U):
2043 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2044 which indicates to the C program that the setservent_r()
2045 routine is available.
2047 d_setsid (d_setsid.U):
2048 This variable conditionally defines HAS_SETSID if setsid() is
2049 available to set the process group ID.
2051 d_setvbuf (d_setvbuf.U):
2052 This variable conditionally defines the HAS_SETVBUF symbol, which
2053 indicates to the C program that the setvbuf() routine is available
2054 to change buffering on an open stdio stream.
2057 This variable conditionally defines the HAS_SHM symbol, which
2058 indicates that the entire shm*(2) library is present.
2060 d_shmat (d_shmat.U):
2061 This variable conditionally defines the HAS_SHMAT symbol, which
2062 indicates to the C program that the shmat() routine is available.
2064 d_shmatprototype (d_shmat.U):
2065 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
2066 symbol, which indicates that sys/shm.h has a prototype for
2069 d_shmctl (d_shmctl.U):
2070 This variable conditionally defines the HAS_SHMCTL symbol, which
2071 indicates to the C program that the shmctl() routine is available.
2073 d_shmdt (d_shmdt.U):
2074 This variable conditionally defines the HAS_SHMDT symbol, which
2075 indicates to the C program that the shmdt() routine is available.
2077 d_shmget (d_shmget.U):
2078 This variable conditionally defines the HAS_SHMGET symbol, which
2079 indicates to the C program that the shmget() routine is available.
2081 d_sigaction (d_sigaction.U):
2082 This variable conditionally defines the HAS_SIGACTION symbol, which
2083 indicates that the Vr4 sigaction() routine is available.
2085 d_signbit (d_signbit.U):
2086 This variable conditionally defines the HAS_SIGNBIT symbol, which
2087 indicates to the C program that the signbit() routine is available
2088 and safe to use with perl's intern NV type.
2090 d_sigprocmask (d_sigprocmask.U):
2091 This variable conditionally defines HAS_SIGPROCMASK
2092 if sigprocmask() is available to examine or change the signal mask
2093 of the calling process.
2095 d_sigsetjmp (d_sigsetjmp.U):
2096 This variable conditionally defines the HAS_SIGSETJMP symbol,
2097 which indicates that the sigsetjmp() routine is available to
2098 call setjmp() and optionally save the process's signal mask.
2100 d_sin6_scope_id (d_socket.U):
2101 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2102 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2105 d_sitearch (sitearch.U):
2106 This variable conditionally defines SITEARCH to hold the pathname
2107 of architecture-dependent library files for $package. If
2108 $sitearch is the same as $archlib, then this is set to undef.
2110 d_snprintf (d_snprintf.U):
2111 This variable conditionally defines the HAS_SNPRINTF symbol, which
2112 indicates to the C program that the snprintf () library function
2115 d_sockaddr_in6 (d_socket.U):
2116 This variable conditionally defines the HAS_SOCKADDR_IN6 symbol, which
2117 indicates the availability of a struct sockaddr_in6.
2119 d_sockaddr_sa_len (d_socket.U):
2120 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2121 which indicates that a struct sockaddr structure has the sa_len
2124 d_sockatmark (d_sockatmark.U):
2125 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2126 indicates to the C program that the sockatmark() routine is available.
2128 d_sockatmarkproto (d_sockatmarkproto.U):
2129 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2130 which indicates to the C program that the system provides
2131 a prototype for the sockatmark() function. Otherwise, it is
2132 up to the program to supply one.
2134 d_socket (d_socket.U):
2135 This variable conditionally defines HAS_SOCKET, which indicates
2136 that the BSD socket interface is supported.
2138 d_socklen_t (d_socklen_t.U):
2139 This symbol will be defined if the C compiler supports socklen_t.
2141 d_sockpair (d_socket.U):
2142 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2143 indicates that the BSD socketpair() is supported.
2145 d_socks5_init (d_socks5_init.U):
2146 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2147 indicates to the C program that the socks5_init() routine is available.
2149 d_sprintf_returns_strlen (d_sprintf_len.U):
2150 This variable defines whether sprintf returns the length of the string
2151 (as per the ANSI spec). Some C libraries retain compatibility with
2152 pre-ANSI C and return a pointer to the passed in buffer; for these
2153 this variable will be undef.
2155 d_sqrtl (d_sqrtl.U):
2156 This variable conditionally defines the HAS_SQRTL symbol, which
2157 indicates to the C program that the sqrtl() routine is available.
2159 d_srand48_r (d_srand48_r.U):
2160 This variable conditionally defines the HAS_SRAND48_R symbol,
2161 which indicates to the C program that the srand48_r()
2162 routine is available.
2164 d_srandom_r (d_srandom_r.U):
2165 This variable conditionally defines the HAS_SRANDOM_R symbol,
2166 which indicates to the C program that the srandom_r()
2167 routine is available.
2169 d_sresgproto (d_sresgproto.U):
2170 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2171 which indicates to the C program that the system provides
2172 a prototype for the setresgid() function. Otherwise, it is
2173 up to the program to supply one.
2175 d_sresuproto (d_sresuproto.U):
2176 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2177 which indicates to the C program that the system provides
2178 a prototype for the setresuid() function. Otherwise, it is
2179 up to the program to supply one.
2181 d_statblks (d_statblks.U):
2182 This variable conditionally defines USE_STAT_BLOCKS
2183 if this system has a stat structure declaring
2184 st_blksize and st_blocks.
2186 d_statfs_f_flags (d_statfs_f_flags.U):
2187 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
2188 symbol, which indicates to struct statfs from has f_flags member.
2189 This kind of struct statfs is coming from sys/mount.h (BSD),
2190 not from sys/statfs.h (SYSV).
2192 d_statfs_s (d_statfs_s.U):
2193 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2194 which indicates that the struct statfs is supported.
2196 d_static_inline (d_static_inline.U):
2197 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2198 which indicates that the C compiler supports C99-style static
2199 inline. That is, the function can't be called from another
2202 d_statvfs (d_statvfs.U):
2203 This variable conditionally defines the HAS_STATVFS symbol, which
2204 indicates to the C program that the statvfs() routine is available.
2206 d_stdio_cnt_lval (d_stdstdio.U):
2207 This variable conditionally defines STDIO_CNT_LVALUE if the
2208 FILE_cnt macro can be used as an lvalue.
2210 d_stdio_ptr_lval (d_stdstdio.U):
2211 This variable conditionally defines STDIO_PTR_LVALUE if the
2212 FILE_ptr macro can be used as an lvalue.
2214 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2215 This symbol is defined if using the FILE_ptr macro as an lvalue
2216 to increase the pointer by n leaves File_cnt(fp) unchanged.
2218 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2219 This symbol is defined if using the FILE_ptr macro as an lvalue
2220 to increase the pointer by n has the side effect of decreasing the
2221 value of File_cnt(fp) by n.
2223 d_stdio_stream_array (stdio_streams.U):
2224 This variable tells whether there is an array holding
2227 d_stdiobase (d_stdstdio.U):
2228 This variable conditionally defines USE_STDIO_BASE if this system
2229 has a FILE structure declaring a usable _base field (or equivalent)
2232 d_stdstdio (d_stdstdio.U):
2233 This variable conditionally defines USE_STDIO_PTR if this system
2234 has a FILE structure declaring usable _ptr and _cnt fields (or
2235 equivalent) in stdio.h.
2237 d_strchr (d_strchr.U):
2238 This variable conditionally defines HAS_STRCHR if strchr() and
2239 strrchr() are available for string searching.
2241 d_strcoll (d_strcoll.U):
2242 This variable conditionally defines HAS_STRCOLL if strcoll() is
2243 available to compare strings using collating information.
2245 d_strctcpy (d_strctcpy.U):
2246 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2247 indicates to the C program that this C compiler knows how to copy
2250 d_strerrm (d_strerror.U):
2251 This variable holds what Strerror is defined as to translate an error
2252 code condition into an error message string. It could be 'strerror'
2253 or a more complex macro emulating strerror with sys_errlist[], or the
2254 "unknown" string when both strerror and sys_errlist are missing.
2256 d_strerror (d_strerror.U):
2257 This variable conditionally defines HAS_STRERROR if strerror() is
2258 available to translate error numbers to strings.
2260 d_strerror_r (d_strerror_r.U):
2261 This variable conditionally defines the HAS_STRERROR_R symbol,
2262 which indicates to the C program that the strerror_r()
2263 routine is available.
2265 d_strftime (d_strftime.U):
2266 This variable conditionally defines the HAS_STRFTIME symbol, which
2267 indicates to the C program that the strftime() routine is available.
2269 d_strlcat (d_strlcat.U):
2270 This variable conditionally defines the HAS_STRLCAT symbol, which
2271 indicates to the C program that the strlcat () routine is available.
2273 d_strlcpy (d_strlcpy.U):
2274 This variable conditionally defines the HAS_STRLCPY symbol, which
2275 indicates to the C program that the strlcpy () routine is available.
2277 d_strtod (d_strtod.U):
2278 This variable conditionally defines the HAS_STRTOD symbol, which
2279 indicates to the C program that the strtod() routine is available
2280 to provide better numeric string conversion than atof().
2282 d_strtol (d_strtol.U):
2283 This variable conditionally defines the HAS_STRTOL symbol, which
2284 indicates to the C program that the strtol() routine is available
2285 to provide better numeric string conversion than atoi() and friends.
2287 d_strtold (d_strtold.U):
2288 This variable conditionally defines the HAS_STRTOLD symbol, which
2289 indicates to the C program that the strtold() routine is available.
2291 d_strtoll (d_strtoll.U):
2292 This variable conditionally defines the HAS_STRTOLL symbol, which
2293 indicates to the C program that the strtoll() routine is available.
2295 d_strtoq (d_strtoq.U):
2296 This variable conditionally defines the HAS_STRTOQ symbol, which
2297 indicates to the C program that the strtoq() routine is available.
2299 d_strtoul (d_strtoul.U):
2300 This variable conditionally defines the HAS_STRTOUL symbol, which
2301 indicates to the C program that the strtoul() routine is available
2302 to provide conversion of strings to unsigned long.
2304 d_strtoull (d_strtoull.U):
2305 This variable conditionally defines the HAS_STRTOULL symbol, which
2306 indicates to the C program that the strtoull() routine is available.
2308 d_strtouq (d_strtouq.U):
2309 This variable conditionally defines the HAS_STRTOUQ symbol, which
2310 indicates to the C program that the strtouq() routine is available.
2312 d_strxfrm (d_strxfrm.U):
2313 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2314 available to transform strings.
2316 d_suidsafe (d_dosuid.U):
2317 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2318 if setuid scripts can be secure. This test looks in /dev/fd/.
2320 d_symlink (d_symlink.U):
2321 This variable conditionally defines the HAS_SYMLINK symbol, which
2322 indicates to the C program that the symlink() routine is available
2323 to create symbolic links.
2325 d_syscall (d_syscall.U):
2326 This variable conditionally defines HAS_SYSCALL if syscall() is
2327 available call arbitrary system calls.
2329 d_syscallproto (d_syscallproto.U):
2330 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2331 which indicates to the C program that the system provides
2332 a prototype for the syscall() function. Otherwise, it is
2333 up to the program to supply one.
2335 d_sysconf (d_sysconf.U):
2336 This variable conditionally defines the HAS_SYSCONF symbol, which
2337 indicates to the C program that the sysconf() routine is available
2338 to determine system related limits and options.
2340 d_sysernlst (d_strerror.U):
2341 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2342 is available to translate error numbers to the symbolic name.
2344 d_syserrlst (d_strerror.U):
2345 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2346 available to translate error numbers to strings.
2348 d_system (d_system.U):
2349 This variable conditionally defines HAS_SYSTEM if system() is
2350 available to issue a shell command.
2352 d_tcgetpgrp (d_tcgtpgrp.U):
2353 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2354 indicates to the C program that the tcgetpgrp() routine is available.
2355 to get foreground process group ID.
2357 d_tcsetpgrp (d_tcstpgrp.U):
2358 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2359 indicates to the C program that the tcsetpgrp() routine is available
2360 to set foreground process group ID.
2362 d_telldir (d_readdir.U):
2363 This variable conditionally defines HAS_TELLDIR if telldir() is
2366 d_telldirproto (d_telldirproto.U):
2367 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2368 which indicates to the C program that the system provides
2369 a prototype for the telldir() function. Otherwise, it is
2370 up to the program to supply one.
2373 This variable conditionally defines the HAS_TIME symbol, which indicates
2374 that the time() routine exists. The time() routine is normally
2375 provided on UNIX systems.
2377 d_timegm (d_timegm.U):
2378 This variable conditionally defines the HAS_TIMEGM symbol, which
2379 indicates to the C program that the timegm () routine is available.
2381 d_times (d_times.U):
2382 This variable conditionally defines the HAS_TIMES symbol, which indicates
2383 that the times() routine exists. The times() routine is normally
2384 provided on UNIX systems. You may have to include <sys/times.h>.
2386 d_tm_tm_gmtoff (i_time.U):
2387 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2388 indicates to the C program that the struct tm has the tm_gmtoff field.
2390 d_tm_tm_zone (i_time.U):
2391 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2392 indicates to the C program that the struct tm has the tm_zone field.
2394 d_tmpnam_r (d_tmpnam_r.U):
2395 This variable conditionally defines the HAS_TMPNAM_R symbol,
2396 which indicates to the C program that the tmpnam_r()
2397 routine is available.
2399 d_truncate (d_truncate.U):
2400 This variable conditionally defines HAS_TRUNCATE if truncate() is
2401 available to truncate files.
2403 d_ttyname_r (d_ttyname_r.U):
2404 This variable conditionally defines the HAS_TTYNAME_R symbol,
2405 which indicates to the C program that the ttyname_r()
2406 routine is available.
2408 d_tzname (d_tzname.U):
2409 This variable conditionally defines HAS_TZNAME if tzname[] is
2410 available to access timezone names.
2412 d_u32align (d_u32align.U):
2413 This variable tells whether you must access character data
2414 through U32-aligned pointers.
2416 d_ualarm (d_ualarm.U):
2417 This variable conditionally defines the HAS_UALARM symbol, which
2418 indicates to the C program that the ualarm() routine is available.
2420 d_umask (d_umask.U):
2421 This variable conditionally defines the HAS_UMASK symbol, which
2422 indicates to the C program that the umask() routine is available.
2423 to set and get the value of the file creation mask.
2425 d_uname (d_gethname.U):
2426 This variable conditionally defines the HAS_UNAME symbol, which
2427 indicates to the C program that the uname() routine may be
2428 used to derive the host name.
2430 d_union_semun (d_union_semun.U):
2431 This variable conditionally defines HAS_UNION_SEMUN if the
2432 union semun is defined by including <sys/sem.h>.
2434 d_unordered (d_unordered.U):
2435 This variable conditionally defines the HAS_UNORDERED symbol, which
2436 indicates to the C program that the unordered() routine is available.
2438 d_unsetenv (d_unsetenv.U):
2439 This variable conditionally defines the HAS_UNSETENV symbol, which
2440 indicates to the C program that the unsetenv () routine is available.
2442 d_usleep (d_usleep.U):
2443 This variable conditionally defines HAS_USLEEP if usleep() is
2444 available to do high granularity sleeps.
2446 d_usleepproto (d_usleepproto.U):
2447 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2448 which indicates to the C program that the system provides
2449 a prototype for the usleep() function. Otherwise, it is
2450 up to the program to supply one.
2452 d_ustat (d_ustat.U):
2453 This variable conditionally defines HAS_USTAT if ustat() is
2454 available to query file system statistics by dev_t.
2456 d_vendorarch (vendorarch.U):
2457 This variable conditionally defined PERL_VENDORARCH.
2459 d_vendorbin (vendorbin.U):
2460 This variable conditionally defines PERL_VENDORBIN.
2462 d_vendorlib (vendorlib.U):
2463 This variable conditionally defines PERL_VENDORLIB.
2465 d_vendorscript (vendorscript.U):
2466 This variable conditionally defines PERL_VENDORSCRIPT.
2468 d_vfork (d_vfork.U):
2469 This variable conditionally defines the HAS_VFORK symbol, which
2470 indicates the vfork() routine is available.
2472 d_void_closedir (d_closedir.U):
2473 This variable conditionally defines VOID_CLOSEDIR if closedir()
2474 does not return a value.
2476 d_voidsig (d_voidsig.U):
2477 This variable conditionally defines VOIDSIG if this system
2478 declares "void (*signal(...))()" in signal.h. The old way was to
2479 declare it as "int (*signal(...))()".
2481 d_voidtty (i_sysioctl.U):
2482 This variable conditionally defines USE_IOCNOTTY to indicate that the
2483 ioctl() call with TIOCNOTTY should be used to void tty association.
2484 Otherwise (on USG probably), it is enough to close the standard file
2485 descriptors and do a setpgrp().
2487 d_volatile (d_volatile.U):
2488 This variable conditionally defines the HASVOLATILE symbol, which
2489 indicates to the C program that this C compiler knows about the
2490 volatile declaration.
2492 d_vprintf (d_vprintf.U):
2493 This variable conditionally defines the HAS_VPRINTF symbol, which
2494 indicates to the C program that the vprintf() routine is available
2495 to printf with a pointer to an argument list.
2497 d_vsnprintf (d_snprintf.U):
2498 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2499 indicates to the C program that the vsnprintf () library function
2502 d_wait4 (d_wait4.U):
2503 This variable conditionally defines the HAS_WAIT4 symbol, which
2504 indicates the wait4() routine is available.
2506 d_waitpid (d_waitpid.U):
2507 This variable conditionally defines HAS_WAITPID if waitpid() is
2508 available to wait for child process.
2510 d_wcstombs (d_wcstombs.U):
2511 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2512 indicates to the C program that the wcstombs() routine is available
2513 to convert wide character strings to multibyte strings.
2515 d_wctomb (d_wctomb.U):
2516 This variable conditionally defines the HAS_WCTOMB symbol, which
2517 indicates to the C program that the wctomb() routine is available
2518 to convert a wide character to a multibyte.
2520 d_writev (d_writev.U):
2521 This variable conditionally defines the HAS_WRITEV symbol, which
2522 indicates to the C program that the writev() routine is available.
2525 This variable conditionally defines the symbol XENIX, which alerts
2526 the C program that it runs under Xenix.
2529 This variable is used internally by Configure to determine the
2530 full pathname (if any) of the date program. After Configure runs,
2531 the value is reset to a plain "date" and is not useful.
2533 db_hashtype (i_db.U):
2534 This variable contains the type of the hash structure element
2535 in the <db.h> header file. In older versions of DB, it was
2536 int, while in newer ones it is u_int32_t.
2538 db_prefixtype (i_db.U):
2539 This variable contains the type of the prefix structure element
2540 in the <db.h> header file. In older versions of DB, it was
2541 int, while in newer ones it is size_t.
2543 db_version_major (i_db.U):
2544 This variable contains the major version number of
2545 Berkeley DB found in the <db.h> header file.
2547 db_version_minor (i_db.U):
2548 This variable contains the minor version number of
2549 Berkeley DB found in the <db.h> header file.
2550 For DB version 1 this is always 0.
2552 db_version_patch (i_db.U):
2553 This variable contains the patch version number of
2554 Berkeley DB found in the <db.h> header file.
2555 For DB version 1 this is always 0.
2557 direntrytype (i_dirent.U):
2558 This symbol is set to 'struct direct' or 'struct dirent' depending on
2559 whether dirent is available or not. You should use this pseudo type to
2560 portably declare your directory entries.
2563 This variable contains the extension that is to be used for the
2564 dynamically loaded modules that perl generates.
2567 This variable contains the name of the dynamic loading file that
2568 will be used with the package.
2570 doublesize (doublesize.U):
2571 This variable contains the value of the DOUBLESIZE symbol, which
2572 indicates to the C program how many bytes there are in a double.
2574 drand01 (randfunc.U):
2575 Indicates the macro to be used to generate normalized
2576 random numbers. Uses randfunc, often divided by
2577 (double) (((unsigned long) 1 << randbits)) in order to
2578 normalize the result.
2579 In C programs, the macro 'Drand01' is mapped to drand01.
2581 drand48_r_proto (d_drand48_r.U):
2582 This variable encodes the prototype of drand48_r.
2583 It is zero if d_drand48_r is undef, and one of the
2584 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2587 dtrace (usedtrace.U):
2588 This variable holds the location of the dtrace executable.
2590 dynamic_ext (Extensions.U):
2591 This variable holds a list of XS extension files we want to
2592 link dynamically into the package. It is used by Makefile.
2594 eagain (nblock_io.U):
2595 This variable bears the symbolic errno code set by read() when no
2596 data is present on the file and non-blocking I/O was enabled (otherwise,
2597 read() blocks naturally).
2600 This variable conditionally defines EBCDIC if this
2601 system uses EBCDIC encoding.
2604 This variable is used internally by Configure to determine the
2605 full pathname (if any) of the echo program. After Configure runs,
2606 the value is reset to a plain "echo" and is not useful.
2609 This variable is used internally by Configure to determine the
2610 full pathname (if any) of the egrep program. After Configure runs,
2611 the value is reset to a plain "egrep" and is not useful.
2614 This variable is defined but not used by Configure.
2615 The value is the empty string and is not useful.
2617 endgrent_r_proto (d_endgrent_r.U):
2618 This variable encodes the prototype of endgrent_r.
2619 It is zero if d_endgrent_r is undef, and one of the
2620 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2623 endhostent_r_proto (d_endhostent_r.U):
2624 This variable encodes the prototype of endhostent_r.
2625 It is zero if d_endhostent_r is undef, and one of the
2626 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2629 endnetent_r_proto (d_endnetent_r.U):
2630 This variable encodes the prototype of endnetent_r.
2631 It is zero if d_endnetent_r is undef, and one of the
2632 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2635 endprotoent_r_proto (d_endprotoent_r.U):
2636 This variable encodes the prototype of endprotoent_r.
2637 It is zero if d_endprotoent_r is undef, and one of the
2638 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2641 endpwent_r_proto (d_endpwent_r.U):
2642 This variable encodes the prototype of endpwent_r.
2643 It is zero if d_endpwent_r is undef, and one of the
2644 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2647 endservent_r_proto (d_endservent_r.U):
2648 This variable encodes the prototype of endservent_r.
2649 It is zero if d_endservent_r is undef, and one of the
2650 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2654 When running under Eunice this variable contains a command which will
2655 convert a shell script to the proper form of text file for it to be
2656 executable by the shell. On other systems it is a no-op.
2659 This is an old synonym for _exe.
2662 This variable is used internally by Configure to determine the
2663 full pathname (if any) of the expr program. After Configure runs,
2664 the value is reset to a plain "expr" and is not useful.
2666 extensions (Extensions.U):
2667 This variable holds a list of all extension files (both XS and
2668 non-xs) installed with the package. It is propagated to Config.pm
2669 and is typically used to test whether a particular extension
2673 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
2674 variable can be used in Configure to do the right thing.
2677 This variable holds a list of extra modules to install.
2679 fflushall (fflushall.U):
2680 This symbol, if defined, tells that to flush
2681 all pending stdio output one must loop through all
2682 the stdio file handles stored in an array and fflush them.
2683 Note that if fflushNULL is defined, fflushall will not
2684 even be probed for and will be left undefined.
2686 fflushNULL (fflushall.U):
2687 This symbol, if defined, tells that fflush(NULL) correctly
2688 flushes all pending stdio output without side effects. In
2689 particular, on some platforms calling fflush(NULL) *still*
2690 corrupts STDIN if it is a pipe.
2693 This variable is defined but not used by Configure.
2694 The value is the empty string and is not useful.
2696 firstmakefile (Unix.U):
2697 This variable defines the first file searched by make. On unix,
2698 it is makefile (then Makefile). On case-insensitive systems,
2699 it might be something else. This is only used to deal with
2700 convoluted make depend tricks.
2703 This variable is defined but not used by Configure.
2704 The value is the empty string and is not useful.
2706 fpossize (fpossize.U):
2707 This variable contains the size of a fpostype in bytes.
2709 fpostype (fpostype.U):
2710 This variable defines Fpos_t to be something like fpos_t, long,
2711 uint, or whatever type is used to declare file positions in libc.
2713 freetype (mallocsrc.U):
2714 This variable contains the return type of free(). It is usually
2715 void, but occasionally int.
2718 This variable contains the command used by Configure
2719 to copy files from the target host. Useful and available
2720 only during Perl build.
2721 The string ':' if not cross-compiling.
2724 This variable contains the full pathname to 'ar', whether or
2725 not the user has specified 'portability'. This is only used
2729 This variable contains the full pathname to 'csh', whether or
2730 not the user has specified 'portability'. This is only used
2731 in the compiled C program, and we assume that all systems which
2732 can share this executable will have the same full pathname to
2735 full_sed (Loc_sed.U):
2736 This variable contains the full pathname to 'sed', whether or
2737 not the user has specified 'portability'. This is only used
2738 in the compiled C program, and we assume that all systems which
2739 can share this executable will have the same full pathname to
2742 gccansipedantic (gccvers.U):
2743 If GNU cc (gcc) is used, this variable will enable (if set) the
2744 -ansi and -pedantic ccflags for building core files (through
2745 cflags script). (See Porting/pumpkin.pod for full description).
2747 gccosandvers (gccvers.U):
2748 If GNU cc (gcc) is used, this variable holds the operating system
2749 and version used to compile gcc. It is set to '' if not gcc,
2750 or if nothing useful can be parsed as the os version.
2752 gccversion (gccvers.U):
2753 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2754 indicate whether the compiler is version 1 or 2. This is used in
2755 setting some of the default cflags. It is set to '' if not gcc.
2757 getgrent_r_proto (d_getgrent_r.U):
2758 This variable encodes the prototype of getgrent_r.
2759 It is zero if d_getgrent_r is undef, and one of the
2760 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2763 getgrgid_r_proto (d_getgrgid_r.U):
2764 This variable encodes the prototype of getgrgid_r.
2765 It is zero if d_getgrgid_r is undef, and one of the
2766 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2769 getgrnam_r_proto (d_getgrnam_r.U):
2770 This variable encodes the prototype of getgrnam_r.
2771 It is zero if d_getgrnam_r is undef, and one of the
2772 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2775 gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2776 This variable encodes the prototype of gethostbyaddr_r.
2777 It is zero if d_gethostbyaddr_r is undef, and one of the
2778 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2781 gethostbyname_r_proto (d_gethostbyname_r.U):
2782 This variable encodes the prototype of gethostbyname_r.
2783 It is zero if d_gethostbyname_r is undef, and one of the
2784 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2787 gethostent_r_proto (d_gethostent_r.U):
2788 This variable encodes the prototype of gethostent_r.
2789 It is zero if d_gethostent_r is undef, and one of the
2790 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2793 getlogin_r_proto (d_getlogin_r.U):
2794 This variable encodes the prototype of getlogin_r.
2795 It is zero if d_getlogin_r is undef, and one of the
2796 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2799 getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2800 This variable encodes the prototype of getnetbyaddr_r.
2801 It is zero if d_getnetbyaddr_r is undef, and one of the
2802 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2805 getnetbyname_r_proto (d_getnetbyname_r.U):
2806 This variable encodes the prototype of getnetbyname_r.
2807 It is zero if d_getnetbyname_r is undef, and one of the
2808 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2811 getnetent_r_proto (d_getnetent_r.U):
2812 This variable encodes the prototype of getnetent_r.
2813 It is zero if d_getnetent_r is undef, and one of the
2814 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2817 getprotobyname_r_proto (d_getprotobyname_r.U):
2818 This variable encodes the prototype of getprotobyname_r.
2819 It is zero if d_getprotobyname_r is undef, and one of the
2820 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2823 getprotobynumber_r_proto (d_getprotobynumber_r.U):
2824 This variable encodes the prototype of getprotobynumber_r.
2825 It is zero if d_getprotobynumber_r is undef, and one of the
2826 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2829 getprotoent_r_proto (d_getprotoent_r.U):
2830 This variable encodes the prototype of getprotoent_r.
2831 It is zero if d_getprotoent_r is undef, and one of the
2832 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2835 getpwent_r_proto (d_getpwent_r.U):
2836 This variable encodes the prototype of getpwent_r.
2837 It is zero if d_getpwent_r is undef, and one of the
2838 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2841 getpwnam_r_proto (d_getpwnam_r.U):
2842 This variable encodes the prototype of getpwnam_r.
2843 It is zero if d_getpwnam_r is undef, and one of the
2844 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2847 getpwuid_r_proto (d_getpwuid_r.U):
2848 This variable encodes the prototype of getpwuid_r.
2849 It is zero if d_getpwuid_r is undef, and one of the
2850 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2853 getservbyname_r_proto (d_getservbyname_r.U):
2854 This variable encodes the prototype of getservbyname_r.
2855 It is zero if d_getservbyname_r is undef, and one of the
2856 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2859 getservbyport_r_proto (d_getservbyport_r.U):
2860 This variable encodes the prototype of getservbyport_r.
2861 It is zero if d_getservbyport_r is undef, and one of the
2862 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2865 getservent_r_proto (d_getservent_r.U):
2866 This variable encodes the prototype of getservent_r.
2867 It is zero if d_getservent_r is undef, and one of the
2868 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2871 getspnam_r_proto (d_getspnam_r.U):
2872 This variable encodes the prototype of getspnam_r.
2873 It is zero if d_getspnam_r is undef, and one of the
2874 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2878 This variable contains the format string used for printing a Gid_t.
2880 gidsign (gidsign.U):
2881 This variable contains the signedness of a gidtype.
2882 1 for unsigned, -1 for signed.
2884 gidsize (gidsize.U):
2885 This variable contains the size of a gidtype in bytes.
2887 gidtype (gidtype.U):
2888 This variable defines Gid_t to be something like gid_t, int,
2889 ushort, or whatever type is used to declare the return type
2890 of getgid(). Typically, it is the type of group ids in the kernel.
2893 This variable holds the general path (space-separated) used to
2894 find libraries. It may contain directories that do not exist on
2895 this platform, libpth is the cleaned-up version.
2898 This variable is used internally by Configure to determine the
2899 full pathname (if any) of the gmake program. After Configure runs,
2900 the value is reset to a plain "gmake" and is not useful.
2902 gmtime_r_proto (d_gmtime_r.U):
2903 This variable encodes the prototype of gmtime_r.
2904 It is zero if d_gmtime_r is undef, and one of the
2905 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2908 gnulibc_version (d_gnulibc.U):
2909 This variable contains the version number of the GNU C library.
2910 It is usually something like '2.2.5'. It is a plain '' if this
2911 is not the GNU C library, or if the version is unknown.
2914 This variable is used internally by Configure to determine the
2915 full pathname (if any) of the grep program. After Configure runs,
2916 the value is reset to a plain "grep" and is not useful.
2919 This variable contains a command that produces the text of the
2920 /etc/group file. This is normally "cat /etc/group", but can be
2921 "ypcat group" when NIS is used.
2922 On some systems, such as os390, there may be no equivalent
2923 command, in which case this variable is unset.
2925 groupstype (groupstype.U):
2926 This variable defines Groups_t to be something like gid_t, int,
2927 ushort, or whatever type is used for the second argument to
2928 getgroups() and setgroups(). Usually, this is the same as
2929 gidtype (gid_t), but sometimes it isn't.
2932 This variable is used internally by Configure to determine the
2933 full pathname (if any) of the gzip program. After Configure runs,
2934 the value is reset to a plain "gzip" and is not useful.
2936 h_fcntl (h_fcntl.U):
2937 This is variable gets set in various places to tell i_fcntl that
2938 <fcntl.h> should be included.
2940 h_sysfile (h_sysfile.U):
2941 This is variable gets set in various places to tell i_sys_file that
2942 <sys/file.h> should be included.
2945 Gives the type of hints used for previous answers. May be one of
2946 "default", "recommended" or "previous".
2949 This variable contains the path to a miniperl binary that can be
2950 run on the host OS when cross-compiling. Useful and available only
2952 Empty string '' if not cross-compiling.
2954 hostgenerate (Cross.U):
2955 This variable contains the path to a generate_uudmap binary that
2956 can be run on the host OS when cross-compiling. Useful and
2957 available only during Perl build.
2958 Empty string '' if not cross-compiling.
2960 hostosname (Cross.U):
2961 This variable contains the original value of '$^O' for hostperl
2962 when cross-compiling. This is useful to pick the proper tools
2963 when running build code in the host.
2964 Empty string '' if not cross-compiling.
2967 This variable contains a command that produces the text of the
2968 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2969 "ypcat hosts" when NIS is used.
2970 On some systems, such as os390, there may be no equivalent
2971 command, in which case this variable is unset.
2973 html1dir (html1dir.U):
2974 This variable contains the name of the directory in which html
2975 source pages are to be put. This directory is for pages
2976 that describe whole programs, not libraries or modules. It
2977 is intended to correspond roughly to section 1 of the Unix
2980 html1direxp (html1dir.U):
2981 This variable is the same as the html1dir variable, but is filename
2982 expanded at configuration time, for convenient use in makefiles.
2984 html3dir (html3dir.U):
2985 This variable contains the name of the directory in which html
2986 source pages are to be put. This directory is for pages
2987 that describe libraries or modules. It is intended to
2988 correspond roughly to section 3 of the Unix manuals.
2990 html3direxp (html3dir.U):
2991 This variable is the same as the html3dir variable, but is filename
2992 expanded at configuration time, for convenient use in makefiles.
2995 This variable is the size of an I16 in bytes.
2998 This variable contains the C type used for Perl's I16.
3001 This variable is the size of an I32 in bytes.
3004 This variable contains the C type used for Perl's I32.
3007 This variable is the size of an I64 in bytes.
3010 This variable contains the C type used for Perl's I64.
3013 This variable is the size of an I8 in bytes.
3016 This variable contains the C type used for Perl's I8.
3018 i_arpainet (i_arpainet.U):
3019 This variable conditionally defines the I_ARPA_INET symbol,
3020 and indicates whether a C program should include <arpa/inet.h>.
3022 i_assert (i_assert.U):
3023 This variable conditionally defines the I_ASSERT symbol, which
3024 indicates to the C program that <assert.h> exists and could be
3027 i_bsdioctl (i_sysioctl.U):
3028 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
3029 indicates to the C program that <sys/bsdioctl.h> exists and should
3032 i_crypt (i_crypt.U):
3033 This variable conditionally defines the I_CRYPT symbol, and indicates
3034 whether a C program should include <crypt.h>.
3037 This variable conditionally defines the I_DB symbol, and indicates
3038 whether a C program may include Berkeley's DB include file <db.h>.
3041 This variable conditionally defines the I_DBM symbol, which
3042 indicates to the C program that <dbm.h> exists and should
3045 i_dirent (i_dirent.U):
3046 This variable conditionally defines I_DIRENT, which indicates
3047 to the C program that it should include <dirent.h>.
3049 i_dlfcn (i_dlfcn.U):
3050 This variable conditionally defines the I_DLFCN symbol, which
3051 indicates to the C program that <dlfcn.h> exists and should
3054 i_fcntl (i_fcntl.U):
3055 This variable controls the value of I_FCNTL (which tells
3056 the C program to include <fcntl.h>).
3058 i_float (i_float.U):
3059 This variable conditionally defines the I_FLOAT symbol, and indicates
3060 whether a C program may include <float.h> to get symbols like DBL_MAX
3061 or DBL_MIN, i.e. machine dependent floating point values.
3064 This variable conditionally defines the I_FP symbol, and indicates
3065 whether a C program should include <fp.h>.
3067 i_fp_class (i_fp_class.U):
3068 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3069 whether a C program should include <fp_class.h>.
3072 This variable conditionally defines the I_GDBM symbol, which
3073 indicates to the C program that <gdbm.h> exists and should
3076 i_gdbm_ndbm (i_ndbm.U):
3077 This variable conditionally defines the I_GDBM_NDBM symbol, which
3078 indicates to the C program that <gdbm-ndbm.h> exists and should
3079 be included. This is the location of the ndbm.h compatibility file
3082 i_gdbmndbm (i_ndbm.U):
3083 This variable conditionally defines the I_GDBMNDBM symbol, which
3084 indicates to the C program that <gdbm/ndbm.h> exists and should
3085 be included. This was the location of the ndbm.h compatibility file
3089 This variable conditionally defines the I_GRP symbol, and indicates
3090 whether a C program should include <grp.h>.
3092 i_ieeefp (i_ieeefp.U):
3093 This variable conditionally defines the I_IEEEFP symbol, and indicates
3094 whether a C program should include <ieeefp.h>.
3096 i_inttypes (i_inttypes.U):
3097 This variable conditionally defines the I_INTTYPES symbol,
3098 and indicates whether a C program should include <inttypes.h>.
3100 i_langinfo (i_langinfo.U):
3101 This variable conditionally defines the I_LANGINFO symbol,
3102 and indicates whether a C program should include <langinfo.h>.
3104 i_libutil (i_libutil.U):
3105 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3106 whether a C program should include <libutil.h>.
3108 i_limits (i_limits.U):
3109 This variable conditionally defines the I_LIMITS symbol, and indicates
3110 whether a C program may include <limits.h> to get symbols like WORD_BIT
3113 i_locale (i_locale.U):
3114 This variable conditionally defines the I_LOCALE symbol,
3115 and indicates whether a C program should include <locale.h>.
3117 i_machcthr (i_machcthr.U):
3118 This variable conditionally defines the I_MACH_CTHREADS symbol,
3119 and indicates whether a C program should include <mach/cthreads.h>.
3121 i_malloc (i_malloc.U):
3122 This variable conditionally defines the I_MALLOC symbol, and indicates
3123 whether a C program should include <malloc.h>.
3125 i_mallocmalloc (i_mallocmalloc.U):
3126 This variable conditionally defines the I_MALLOCMALLOC symbol,
3127 and indicates whether a C program should include <malloc/malloc.h>.
3130 This variable conditionally defines the I_MATH symbol, and indicates
3131 whether a C program may include <math.h>.
3133 i_memory (i_memory.U):
3134 This variable conditionally defines the I_MEMORY symbol, and indicates
3135 whether a C program should include <memory.h>.
3137 i_mntent (i_mntent.U):
3138 This variable conditionally defines the I_MNTENT symbol, and indicates
3139 whether a C program should include <mntent.h>.
3142 This variable conditionally defines the I_NDBM symbol, which
3143 indicates to the C program that <ndbm.h> exists and should
3146 i_netdb (i_netdb.U):
3147 This variable conditionally defines the I_NETDB symbol, and indicates
3148 whether a C program should include <netdb.h>.
3150 i_neterrno (i_neterrno.U):
3151 This variable conditionally defines the I_NET_ERRNO symbol, which
3152 indicates to the C program that <net/errno.h> exists and should
3155 i_netinettcp (i_netinettcp.U):
3156 This variable conditionally defines the I_NETINET_TCP symbol,
3157 and indicates whether a C program should include <netinet/tcp.h>.
3160 This variable conditionally defines I_NETINET_IN, which indicates
3161 to the C program that it should include <netinet/in.h>. Otherwise,
3162 you may try <sys/in.h>.
3165 This variable conditionally defines the I_POLL symbol, and indicates
3166 whether a C program should include <poll.h>.
3169 This variable conditionally defines the I_PROT symbol, and indicates
3170 whether a C program should include <prot.h>.
3172 i_pthread (i_pthread.U):
3173 This variable conditionally defines the I_PTHREAD symbol,
3174 and indicates whether a C program should include <pthread.h>.
3177 This variable conditionally defines I_PWD, which indicates
3178 to the C program that it should include <pwd.h>.
3180 i_rpcsvcdbm (i_dbm.U):
3181 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3182 indicates to the C program that <rpcsvc/dbm.h> exists and should
3183 be included. Some System V systems might need this instead of <dbm.h>.
3185 i_sgtty (i_termio.U):
3186 This variable conditionally defines the I_SGTTY symbol, which
3187 indicates to the C program that it should include <sgtty.h> rather
3190 i_shadow (i_shadow.U):
3191 This variable conditionally defines the I_SHADOW symbol, and indicates
3192 whether a C program should include <shadow.h>.
3194 i_socks (i_socks.U):
3195 This variable conditionally defines the I_SOCKS symbol, and indicates
3196 whether a C program should include <socks.h>.
3198 i_stdarg (i_varhdr.U):
3199 This variable conditionally defines the I_STDARG symbol, which
3200 indicates to the C program that <stdarg.h> exists and should
3203 i_stdbool (i_stdbool.U):
3204 This variable conditionally defines the I_STDBOOL symbol, which
3205 indicates to the C program that <stdbool.h> exists and should
3208 i_stddef (i_stddef.U):
3209 This variable conditionally defines the I_STDDEF symbol, which
3210 indicates to the C program that <stddef.h> exists and should
3213 i_stdlib (i_stdlib.U):
3214 This variable conditionally defines the I_STDLIB symbol, which
3215 indicates to the C program that <stdlib.h> exists and should
3218 i_string (i_string.U):
3219 This variable conditionally defines the I_STRING symbol, which
3220 indicates that <string.h> should be included rather than <strings.h>.
3222 i_sunmath (i_sunmath.U):
3223 This variable conditionally defines the I_SUNMATH symbol, and indicates
3224 whether a C program should include <sunmath.h>.
3226 i_sysaccess (i_sysaccess.U):
3227 This variable conditionally defines the I_SYS_ACCESS symbol,
3228 and indicates whether a C program should include <sys/access.h>.
3230 i_sysdir (i_sysdir.U):
3231 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3232 whether a C program should include <sys/dir.h>.
3234 i_sysfile (i_sysfile.U):
3235 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3236 whether a C program should include <sys/file.h> to get R_OK and friends.
3238 i_sysfilio (i_sysioctl.U):
3239 This variable conditionally defines the I_SYS_FILIO symbol, which
3240 indicates to the C program that <sys/filio.h> exists and should
3241 be included in preference to <sys/ioctl.h>.
3244 This variable conditionally defines I_SYS_IN, which indicates
3245 to the C program that it should include <sys/in.h> instead of
3248 i_sysioctl (i_sysioctl.U):
3249 This variable conditionally defines the I_SYS_IOCTL symbol, which
3250 indicates to the C program that <sys/ioctl.h> exists and should
3253 i_syslog (i_syslog.U):
3254 This variable conditionally defines the I_SYSLOG symbol,
3255 and indicates whether a C program should include <syslog.h>.
3257 i_sysmman (i_sysmman.U):
3258 This variable conditionally defines the I_SYS_MMAN symbol, and
3259 indicates whether a C program should include <sys/mman.h>.
3261 i_sysmode (i_sysmode.U):
3262 This variable conditionally defines the I_SYSMODE symbol,
3263 and indicates whether a C program should include <sys/mode.h>.
3265 i_sysmount (i_sysmount.U):
3266 This variable conditionally defines the I_SYSMOUNT symbol,
3267 and indicates whether a C program should include <sys/mount.h>.
3269 i_sysndir (i_sysndir.U):
3270 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3271 whether a C program should include <sys/ndir.h>.
3273 i_sysparam (i_sysparam.U):
3274 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3275 whether a C program should include <sys/param.h>.
3277 i_syspoll (i_syspoll.U):
3278 This variable conditionally defines the I_SYS_POLL symbol, which
3279 indicates to the C program that it should include <sys/poll.h>.
3281 i_sysresrc (i_sysresrc.U):
3282 This variable conditionally defines the I_SYS_RESOURCE symbol,
3283 and indicates whether a C program should include <sys/resource.h>.
3285 i_syssecrt (i_syssecrt.U):
3286 This variable conditionally defines the I_SYS_SECURITY symbol,
3287 and indicates whether a C program should include <sys/security.h>.
3289 i_sysselct (i_sysselct.U):
3290 This variable conditionally defines I_SYS_SELECT, which indicates
3291 to the C program that it should include <sys/select.h> in order to
3292 get the definition of struct timeval.
3294 i_syssockio (i_sysioctl.U):
3295 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3296 C program that socket ioctl codes may be found in <sys/sockio.h>
3297 instead of <sys/ioctl.h>.
3299 i_sysstat (i_sysstat.U):
3300 This variable conditionally defines the I_SYS_STAT symbol,
3301 and indicates whether a C program should include <sys/stat.h>.
3303 i_sysstatfs (i_sysstatfs.U):
3304 This variable conditionally defines the I_SYSSTATFS symbol,
3305 and indicates whether a C program should include <sys/statfs.h>.
3307 i_sysstatvfs (i_sysstatvfs.U):
3308 This variable conditionally defines the I_SYSSTATVFS symbol,
3309 and indicates whether a C program should include <sys/statvfs.h>.
3311 i_systime (i_time.U):
3312 This variable conditionally defines I_SYS_TIME, which indicates
3313 to the C program that it should include <sys/time.h>.
3315 i_systimek (i_time.U):
3316 This variable conditionally defines I_SYS_TIME_KERNEL, which
3317 indicates to the C program that it should include <sys/time.h>
3318 with KERNEL defined.
3320 i_systimes (i_systimes.U):
3321 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3322 whether a C program should include <sys/times.h>.
3324 i_systypes (i_systypes.U):
3325 This variable conditionally defines the I_SYS_TYPES symbol,
3326 and indicates whether a C program should include <sys/types.h>.
3328 i_sysuio (i_sysuio.U):
3329 This variable conditionally defines the I_SYSUIO symbol, and indicates
3330 whether a C program should include <sys/uio.h>.
3332 i_sysun (i_sysun.U):
3333 This variable conditionally defines I_SYS_UN, which indicates
3334 to the C program that it should include <sys/un.h> to get UNIX
3335 domain socket definitions.
3337 i_sysutsname (i_sysutsname.U):
3338 This variable conditionally defines the I_SYSUTSNAME symbol,
3339 and indicates whether a C program should include <sys/utsname.h>.
3341 i_sysvfs (i_sysvfs.U):
3342 This variable conditionally defines the I_SYSVFS symbol,
3343 and indicates whether a C program should include <sys/vfs.h>.
3345 i_syswait (i_syswait.U):
3346 This variable conditionally defines I_SYS_WAIT, which indicates
3347 to the C program that it should include <sys/wait.h>.
3349 i_termio (i_termio.U):
3350 This variable conditionally defines the I_TERMIO symbol, which
3351 indicates to the C program that it should include <termio.h> rather
3354 i_termios (i_termio.U):
3355 This variable conditionally defines the I_TERMIOS symbol, which
3356 indicates to the C program that the POSIX <termios.h> file is
3360 This variable conditionally defines I_TIME, which indicates
3361 to the C program that it should include <time.h>.
3363 i_unistd (i_unistd.U):
3364 This variable conditionally defines the I_UNISTD symbol, and indicates
3365 whether a C program should include <unistd.h>.
3367 i_ustat (i_ustat.U):
3368 This variable conditionally defines the I_USTAT symbol, and indicates
3369 whether a C program should include <ustat.h>.
3371 i_utime (i_utime.U):
3372 This variable conditionally defines the I_UTIME symbol, and indicates
3373 whether a C program should include <utime.h>.
3375 i_values (i_values.U):
3376 This variable conditionally defines the I_VALUES symbol, and indicates
3377 whether a C program may include <values.h> to get symbols like MAXLONG
3380 i_varargs (i_varhdr.U):
3381 This variable conditionally defines I_VARARGS, which indicates
3382 to the C program that it should include <varargs.h>.
3384 i_varhdr (i_varhdr.U):
3385 Contains the name of the header to be included to get va_dcl definition.
3386 Typically one of varargs.h or stdarg.h.
3388 i_vfork (i_vfork.U):
3389 This variable conditionally defines the I_VFORK symbol, and indicates
3390 whether a C program should include vfork.h.
3392 ignore_versioned_solibs (libs.U):
3393 This variable should be non-empty if non-versioned shared
3394 libraries (libfoo.so.x.y) are to be ignored (because they
3395 cannot be linked against).
3397 inc_version_list (inc_version_list.U):
3398 This variable specifies the list of subdirectories in over
3399 which perl.c:incpush() and lib/lib.pm will automatically
3400 search when adding directories to @INC. The elements in
3401 the list are separated by spaces. This is only useful
3402 if you have a perl library directory tree structured like the
3403 default one. See INSTALL for how this works. The versioned
3404 site_perl directory was introduced in 5.005, so that is the
3405 lowest possible value.
3407 This list includes architecture-dependent directories back to
3408 version $api_versionstring (e.g. 5.5.640) and
3409 architecture-independent directories all the way back to
3412 inc_version_list_init (inc_version_list.U):
3413 This variable holds the same list as inc_version_list, but
3414 each item is enclosed in double quotes and separated by commas,
3415 suitable for use in the PERL_INC_VERSION_LIST initialization.
3418 This variable must precede the normal include path to get the
3419 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3420 Value can be "" or "/bsd43" on mips.
3423 This variable must precede the normal include path to get the
3424 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3425 Value can be "" or "/bsd43" on mips.
3428 This variable is defined but not used by Configure.
3429 The value is the empty string and is not useful.
3431 initialinstalllocation (bin.U):
3432 When userelocatableinc is true, this variable holds the location
3433 that make install should copy the perl binary to, with all the
3434 run-time relocatable paths calculated from this at install time.
3435 When used, it is initialized to the original value of binexp, and
3436 then binexp is set to '.../', as the other binaries are found
3437 relative to the perl binary.
3439 installarchlib (archlib.U):
3440 This variable is really the same as archlibexp but may differ on
3441 those systems using AFS. For extra portability, only this variable
3442 should be used in makefiles.
3445 This variable is the same as binexp unless AFS is running in which case
3446 the user is explicitly prompted for it. This variable should always
3447 be used in your makefiles for maximum portability.
3449 installhtml1dir (html1dir.U):
3450 This variable is really the same as html1direxp, unless you are
3451 using a different installprefix. For extra portability, you
3452 should only use this variable within your makefiles.
3454 installhtml3dir (html3dir.U):
3455 This variable is really the same as html3direxp, unless you are
3456 using a different installprefix. For extra portability, you
3457 should only use this variable within your makefiles.
3459 installman1dir (man1dir.U):
3460 This variable is really the same as man1direxp, unless you are using
3461 AFS in which case it points to the read/write location whereas
3462 man1direxp only points to the read-only access location. For extra
3463 portability, you should only use this variable within your makefiles.
3465 installman3dir (man3dir.U):
3466 This variable is really the same as man3direxp, unless you are using
3467 AFS in which case it points to the read/write location whereas
3468 man3direxp only points to the read-only access location. For extra
3469 portability, you should only use this variable within your makefiles.
3471 installprefix (installprefix.U):
3472 This variable holds the name of the directory below which
3473 "make install" will install the package. For most users, this
3474 is the same as prefix. However, it is useful for
3475 installing the software into a different (usually temporary)
3476 location after which it can be bundled up and moved somehow
3477 to the final location specified by prefix.
3479 installprefixexp (installprefix.U):
3480 This variable holds the full absolute path of installprefix
3481 with all ~-expansion done.
3483 installprivlib (privlib.U):
3484 This variable is really the same as privlibexp but may differ on
3485 those systems using AFS. For extra portability, only this variable
3486 should be used in makefiles.
3488 installscript (scriptdir.U):
3489 This variable is usually the same as scriptdirexp, unless you are on
3490 a system running AFS, in which case they may differ slightly. You
3491 should always use this variable within your makefiles for portability.
3493 installsitearch (sitearch.U):
3494 This variable is really the same as sitearchexp but may differ on
3495 those systems using AFS. For extra portability, only this variable
3496 should be used in makefiles.
3498 installsitebin (sitebin.U):
3499 This variable is usually the same as sitebinexp, unless you are on
3500 a system running AFS, in which case they may differ slightly. You
3501 should always use this variable within your makefiles for portability.
3503 installsitehtml1dir (sitehtml1dir.U):
3504 This variable is really the same as sitehtml1direxp, unless you are using
3505 AFS in which case it points to the read/write location whereas
3506 html1direxp only points to the read-only access location. For extra
3507 portability, you should only use this variable within your makefiles.
3509 installsitehtml3dir (sitehtml3dir.U):
3510 This variable is really the same as sitehtml3direxp, unless you are using
3511 AFS in which case it points to the read/write location whereas
3512 html3direxp only points to the read-only access location. For extra
3513 portability, you should only use this variable within your makefiles.
3515 installsitelib (sitelib.U):
3516 This variable is really the same as sitelibexp but may differ on
3517 those systems using AFS. For extra portability, only this variable
3518 should be used in makefiles.
3520 installsiteman1dir (siteman1dir.U):
3521 This variable is really the same as siteman1direxp, unless you are using
3522 AFS in which case it points to the read/write location whereas
3523 man1direxp only points to the read-only access location. For extra
3524 portability, you should only use this variable within your makefiles.
3526 installsiteman3dir (siteman3dir.U):
3527 This variable is really the same as siteman3direxp, unless you are using
3528 AFS in which case it points to the read/write location whereas
3529 man3direxp only points to the read-only access location. For extra
3530 portability, you should only use this variable within your makefiles.
3532 installsitescript (sitescript.U):
3533 This variable is usually the same as sitescriptexp, unless you are on
3534 a system running AFS, in which case they may differ slightly. You
3535 should always use this variable within your makefiles for portability.
3537 installstyle (installstyle.U):
3538 This variable describes the "style" of the perl installation.
3539 This is intended to be useful for tools that need to
3540 manipulate entire perl distributions. Perl itself doesn't use
3541 this to find its libraries -- the library directories are
3542 stored directly in Config.pm. Currently, there are only two
3543 styles: "lib" and "lib/perl5". The default library locations
3544 (e.g. privlib, sitelib) are either $prefix/lib or
3545 $prefix/lib/perl5. The former is useful if $prefix is a
3546 directory dedicated to perl (e.g. /opt/perl), while the latter
3547 is useful if $prefix is shared by many packages, e.g. if
3550 Unfortunately, while this "style" variable is used to set
3551 defaults for all three directory hierarchies (core, vendor, and
3552 site), there is no guarantee that the same style is actually
3553 appropriate for all those directories. For example, $prefix
3554 might be /opt/perl, but $siteprefix might be /usr/local.
3555 (Perhaps, in retrospect, the "lib" style should never have been
3556 supported, but it did seem like a nice idea at the time.)
3558 The situation is even less clear for tools such as MakeMaker
3559 that can be used to install additional modules into
3560 non-standard places. For example, if a user intends to install
3561 a module into a private directory (perhaps by setting PREFIX on
3562 the Makefile.PL command line), then there is no reason to
3563 assume that the Configure-time $installstyle setting will be
3564 relevant for that PREFIX.
3566 This may later be extended to include other information, so
3567 be careful with pattern-matching on the results.
3569 For compatibility with perl5.005 and earlier, the default
3570 setting is based on whether or not $prefix contains the string
3573 installusrbinperl (instubperl.U):
3574 This variable tells whether Perl should be installed also as
3575 /usr/bin/perl in addition to
3578 installvendorarch (vendorarch.U):
3579 This variable is really the same as vendorarchexp but may differ on
3580 those systems using AFS. For extra portability, only this variable
3581 should be used in makefiles.
3583 installvendorbin (vendorbin.U):
3584 This variable is really the same as vendorbinexp but may differ on
3585 those systems using AFS. For extra portability, only this variable
3586 should be used in makefiles.
3588 installvendorhtml1dir (vendorhtml1dir.U):
3589 This variable is really the same as vendorhtml1direxp but may differ on
3590 those systems using AFS. For extra portability, only this variable
3591 should be used in makefiles.
3593 installvendorhtml3dir (vendorhtml3dir.U):
3594 This variable is really the same as vendorhtml3direxp but may differ on
3595 those systems using AFS. For extra portability, only this variable
3596 should be used in makefiles.
3598 installvendorlib (vendorlib.U):
3599 This variable is really the same as vendorlibexp but may differ on
3600 those systems using AFS. For extra portability, only this variable
3601 should be used in makefiles.
3603 installvendorman1dir (vendorman1dir.U):
3604 This variable is really the same as vendorman1direxp but may differ on
3605 those systems using AFS. For extra portability, only this variable
3606 should be used in makefiles.
3608 installvendorman3dir (vendorman3dir.U):
3609 This variable is really the same as vendorman3direxp but may differ on
3610 those systems using AFS. For extra portability, only this variable
3611 should be used in makefiles.
3613 installvendorscript (vendorscript.U):
3614 This variable is really the same as vendorscriptexp but may differ on
3615 those systems using AFS. For extra portability, only this variable
3616 should be used in makefiles.
3618 intsize (intsize.U):
3619 This variable contains the value of the INTSIZE symbol, which
3620 indicates to the C program how many bytes there are in an int.
3622 issymlink (issymlink.U):
3623 This variable holds the test command to test for a symbolic link
3624 (if they are supported). Typical values include 'test -h' and
3627 ivdformat (perlxvf.U):
3628 This variable contains the format string used for printing
3629 a Perl IV as a signed decimal integer.
3632 This variable is the size of an IV in bytes.
3635 This variable contains the C type used for Perl's IV.
3637 known_extensions (Extensions.U):
3638 This variable holds a list of all extensions (both XS and non-xs)
3639 included in the package source distribution. This information is
3640 only really of use during the Perl build, as the list makes no
3641 distinction between extensions which were build and installed, and
3642 those which where not. See "extensions" for the list of extensions
3643 actually built and available.
3646 This variable is defined but not used by Configure.
3647 The value is the empty string and is not useful.
3650 This variable indicates the program to be used to link
3651 libraries for dynamic loading. On some systems, it is 'ld'.
3652 On ELF systems, it should be $cc. Mostly, we'll try to respect
3653 the hint file setting.
3655 ld_can_script (dlsrc.U):
3656 This variable shows if the loader accepts scripts in the form of
3657 -Wl,--version-script=ld.script. This is currently only supported
3658 for GNU ld on ELF in dynamic loading builds.
3660 lddlflags (dlsrc.U):
3661 This variable contains any special flags that might need to be
3662 passed to $ld to create a shared library suitable for dynamic
3663 loading. It is up to the makefile to use it. For hpux, it
3664 should be '-b'. For sunos 4.1, it is empty.
3666 ldflags (ccflags.U):
3667 This variable contains any additional C loader flags desired by
3668 the user. It is up to the Makefile to use this.
3670 ldflags_uselargefiles (uselfs.U):
3671 This variable contains the loader flags needed by large file builds
3672 and added to ldflags by hints files.
3674 ldlibpthname (libperl.U):
3675 This variable holds the name of the shared library
3676 search path, often LD_LIBRARY_PATH. To get an empty
3677 string, the hints file must set this to 'none'.
3680 This variable is used internally by Configure to determine the
3681 full pathname (if any) of the less program. After Configure runs,
3682 the value is reset to a plain "less" and is not useful.
3685 This is an old synonym for _a.
3688 This variable contains the location of the C library.
3690 libperl (libperl.U):
3691 The perl executable is obtained by linking perlmain.c with
3692 libperl, any static extensions (usually just DynaLoader),
3693 and any other libraries needed on this system. libperl
3694 is usually libperl.a, but can also be libperl.so.xxx if
3695 the user wishes to build a perl executable with a shared
3699 This variable holds the general path (space-separated) used to find
3700 libraries. It is intended to be used by other units.
3703 This variable holds the additional libraries we want to use.
3704 It is up to the Makefile to deal with it. The list can be empty.
3707 This variable holds the directory names aka dirnames of the libraries
3708 we found and accepted, duplicates are removed.
3711 This variable holds the filenames aka basenames of the libraries
3712 we found and accepted.
3715 This variable holds the full pathnames of the libraries
3716 we found and accepted.
3719 This variable holds the directory names probed for libraries.
3721 libswanted (Myinit.U):
3722 This variable holds a list of all the libraries we want to
3723 search. The order is chosen to pick up the c library
3724 ahead of ucb or bsd libraries for SVR4.
3726 libswanted_uselargefiles (uselfs.U):
3727 This variable contains the libraries needed by large file builds
3728 and added to ldflags by hints files. It is a space separated list
3729 of the library names without the "lib" prefix or any suffix, just
3733 This variable is defined but not used by Configure.
3734 The value is the empty string and is not useful.
3737 This variable is defined but not used by Configure.
3738 The value is the empty string and is not useful.
3740 lkflags (ccflags.U):
3741 This variable contains any additional C partial linker flags desired by
3742 the user. It is up to the Makefile to use this.
3745 This variable is used internally by Configure to determine the
3746 full pathname (if any) of the ln program. After Configure runs,
3747 the value is reset to a plain "ln" and is not useful.
3750 This variable holds the name of the command to make
3751 symbolic links (if they are supported). It can be used
3752 in the Makefile. It is either 'ln -s' or 'ln'
3754 localtime_r_proto (d_localtime_r.U):
3755 This variable encodes the prototype of localtime_r.
3756 It is zero if d_localtime_r is undef, and one of the
3757 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3760 locincpth (ccflags.U):
3761 This variable contains a list of additional directories to be
3762 searched by the compiler. The appropriate '-I' directives will
3763 be added to ccflags. This is intended to simplify setting
3764 local directories from the Configure command line.
3765 It's not much, but it parallels the loclibpth stuff in libpth.U.
3767 loclibpth (libpth.U):
3768 This variable holds the paths (space-separated) used to find local
3769 libraries. It is prepended to libpth, and is intended to be easily
3770 set from the command line.
3772 longdblsize (d_longdbl.U):
3773 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3774 indicates to the C program how many bytes there are in a long double,
3775 if this system supports long doubles.
3777 longlongsize (d_longlong.U):
3778 This variable contains the value of the LONGLONGSIZE symbol, which
3779 indicates to the C program how many bytes there are in a long long,
3780 if this system supports long long.
3782 longsize (intsize.U):
3783 This variable contains the value of the LONGSIZE symbol, which
3784 indicates to the C program how many bytes there are in a long.
3787 This variable is defined but not used by Configure.
3788 The value is the empty string and is not useful.
3791 This variable is defined but not used by Configure.
3792 The value is the empty string and is not useful.
3795 This variable is used internally by Configure to determine the
3796 full pathname (if any) of the ls program. After Configure runs,
3797 the value is reset to a plain "ls" and is not useful.
3799 lseeksize (lseektype.U):
3800 This variable defines lseektype to be something like off_t, long,
3801 or whatever type is used to declare lseek offset's type in the
3802 kernel (which also appears to be lseek's return type).
3804 lseektype (lseektype.U):
3805 This variable defines lseektype to be something like off_t, long,
3806 or whatever type is used to declare lseek offset's type in the
3807 kernel (which also appears to be lseek's return type).
3810 This variable indicates that the Misc Attribute Definition code is to
3814 If the Misc Attribute Decoration is to be compiled, this variable is
3815 set to the name of the extra header files to be used, else it is ''
3818 If the Misc Attribute Decoration is to be compiled, this variable is
3819 set to the name of the extra object files to be used, else it is ''
3822 If the Misc Attribute Decoration is to be compiled, this variable is
3823 set to the name of the extra C source files to be used, else it is ''
3826 This variable is defined but not used by Configure.
3827 The value is the empty string and is not useful.
3830 This variable is defined but not used by Configure.
3831 The value is the empty string and is not useful.
3834 This variable is used internally by Configure to determine the
3835 full pathname (if any) of the make program. After Configure runs,
3836 the value is reset to a plain "make" and is not useful.
3838 make_set_make (make.U):
3839 Some versions of 'make' set the variable MAKE. Others do not.
3840 This variable contains the string to be included in Makefile.SH
3841 so that MAKE is set if needed, and not if not needed.
3842 Possible values are:
3844 make_set_make='#' # If your make program handles this for you,
3846 make_set_make="MAKE=$make" # if it doesn't.
3848 This uses a comment character so that we can distinguish a
3849 'set' value (from a previous config.sh or Configure '-D' option)
3850 from an uncomputed value.
3852 mallocobj (mallocsrc.U):
3853 This variable contains the name of the malloc.o that this package
3854 generates, if that malloc.o is preferred over the system malloc.
3855 Otherwise the value is null. This variable is intended for generating
3856 Makefiles. See mallocsrc.
3858 mallocsrc (mallocsrc.U):
3859 This variable contains the name of the malloc.c that comes with
3860 the package, if that malloc.c is preferred over the system malloc.
3861 Otherwise the value is null. This variable is intended for generating
3864 malloctype (mallocsrc.U):
3865 This variable contains the kind of ptr returned by malloc and realloc.
3867 man1dir (man1dir.U):
3868 This variable contains the name of the directory in which manual
3869 source pages are to be put. It is the responsibility of the
3870 Makefile.SH to get the value of this into the proper command.
3871 You must be prepared to do the ~name expansion yourself.
3873 man1direxp (man1dir.U):
3874 This variable is the same as the man1dir variable, but is filename
3875 expanded at configuration time, for convenient use in makefiles.
3877 man1ext (man1dir.U):
3878 This variable contains the extension that the manual page should
3879 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3882 man3dir (man3dir.U):
3883 This variable contains the name of the directory in which manual
3884 source pages are to be put. It is the responsibility of the
3885 Makefile.SH to get the value of this into the proper command.
3886 You must be prepared to do the ~name expansion yourself.
3888 man3direxp (man3dir.U):
3889 This variable is the same as the man3dir variable, but is filename
3890 expanded at configuration time, for convenient use in makefiles.
3892 man3ext (man3dir.U):
3893 This variable contains the extension that the manual page should
3894 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3897 mips_type (usrinc.U):
3898 This variable holds the environment type for the mips system.
3899 Possible values are "BSD 4.3" and "System V".
3901 mistrustnm (Csym.U):
3902 This variable can be used to establish a fallthrough for the cases
3903 where nm fails to find a symbol. If usenm is false or usenm is true
3904 and mistrustnm is false, this variable has no effect. If usenm is true
3905 and mistrustnm is "compile", a test program will be compiled to try to
3906 find any symbol that can't be located via nm lookup. If mistrustnm is
3907 "run", the test program will be run as well as being compiled.
3910 This variable is used internally by Configure to determine the
3911 full pathname (if any) of the mkdir program. After Configure runs,
3912 the value is reset to a plain "mkdir" and is not useful.
3914 mmaptype (d_mmap.U):
3915 This symbol contains the type of pointer returned by mmap()
3916 (and simultaneously the type of the first argument).
3917 It can be 'void *' or 'caddr_t'.
3919 modetype (modetype.U):
3920 This variable defines modetype to be something like mode_t,
3921 int, unsigned short, or whatever type is used to declare file
3922 modes for system calls.
3925 This variable is used internally by Configure to determine the
3926 full pathname (if any) of the more program. After Configure runs,
3927 the value is reset to a plain "more" and is not useful.
3929 multiarch (multiarch.U):
3930 This variable conditionally defines the MULTIARCH symbol
3931 which signifies the presence of multiplatform files.
3932 This is normally set by hints files.
3935 This variable is defined but not used by Configure.
3936 The value is the empty string and is not useful.
3938 myarchname (archname.U):
3939 This variable holds the architecture name computed by Configure in
3940 a previous run. It is not intended to be perused by any user and
3941 should never be set in a hint file.
3943 mydomain (myhostname.U):
3944 This variable contains the eventual value of the MYDOMAIN symbol,
3945 which is the domain of the host the program is going to run on.
3946 The domain must be appended to myhostname to form a complete host name.
3947 The dot comes with mydomain, and need not be supplied by the program.
3949 myhostname (myhostname.U):
3950 This variable contains the eventual value of the MYHOSTNAME symbol,
3951 which is the name of the host the program is going to run on.
3952 The domain is not kept with hostname, but must be gotten from mydomain.
3953 The dot comes with mydomain, and need not be supplied by the program.
3955 myuname (Oldconfig.U):
3956 The output of 'uname -a' if available, otherwise the hostname.
3957 The whole thing is then lower-cased and slashes and single quotes are
3961 This variable contains the '-n' flag if that is what causes the echo
3962 command to suppress newline. Otherwise it is null. Correct usage is
3963 $echo $n "prompt for a question: $c".
3965 need_va_copy (need_va_copy.U):
3966 This symbol, if defined, indicates that the system stores
3967 the variable argument list datatype, va_list, in a format
3968 that cannot be copied by simple assignment, so that some
3969 other means must be used when copying is required.
3970 As such systems vary in their provision (or non-provision)
3971 of copying mechanisms, handy.h defines a platform-
3972 independent macro, Perl_va_copy(src, dst), to do the job.
3974 netdb_hlen_type (netdbtype.U):
3975 This variable holds the type used for the 2nd argument to
3976 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3977 This is only useful if you have gethostbyaddr(), naturally.
3979 netdb_host_type (netdbtype.U):
3980 This variable holds the type used for the 1st argument to
3981 gethostbyaddr(). Usually, this is char * or void *, possibly
3982 with or without a const prefix.
3983 This is only useful if you have gethostbyaddr(), naturally.
3985 netdb_name_type (netdbtype.U):
3986 This variable holds the type used for the argument to
3987 gethostbyname(). Usually, this is char * or const char *.
3988 This is only useful if you have gethostbyname(), naturally.
3990 netdb_net_type (netdbtype.U):
3991 This variable holds the type used for the 1st argument to
3992 getnetbyaddr(). Usually, this is int or long.
3993 This is only useful if you have getnetbyaddr(), naturally.
3996 This variable is used internally by Configure to determine the
3997 full pathname (if any) of the nm program. After Configure runs,
3998 the value is reset to a plain "nm" and is not useful.
4001 This variable holds the options that may be necessary for nm.
4003 nm_so_opt (usenm.U):
4004 This variable holds the options that may be necessary for nm
4005 to work on a shared library but that can not be used on an
4006 archive library. Currently, this is only used by Linux, where
4007 nm --dynamic is *required* to get symbols from an ELF library which
4008 has been stripped, but nm --dynamic is *fatal* on an archive library.
4009 Maybe Linux should just always set usenm=false.
4011 nonxs_ext (Extensions.U):
4012 This variable holds a list of all non-xs extensions built and
4013 installed by the package. By default, all non-xs extensions
4014 distributed will be built, with the exception of platform-specific
4015 extensions (currently only one VMS specific extension).
4018 This variable is used internally by Configure to determine the
4019 full pathname (if any) of the nroff program. After Configure runs,
4020 the value is reset to a plain "nroff" and is not useful.
4022 nv_overflows_integers_at (perlxv.U):
4023 This variable gives the largest integer value that NVs can hold
4024 as a constant floating point expression.
4025 If it could not be determined, it holds the value 0.
4027 nv_preserves_uv_bits (perlxv.U):
4028 This variable indicates how many of bits type uvtype
4029 a variable nvtype can preserve.
4031 nveformat (perlxvf.U):
4032 This variable contains the format string used for printing
4033 a Perl NV using %e-ish floating point format.
4035 nvEUformat (perlxvf.U):
4036 This variable contains the format string used for printing
4037 a Perl NV using %E-ish floating point format.
4039 nvfformat (perlxvf.U):
4040 This variable contains the format string used for printing
4041 a Perl NV using %f-ish floating point format.
4043 nvFUformat (perlxvf.U):
4044 This variable contains the format string used for printing
4045 a Perl NV using %F-ish floating point format.
4047 nvgformat (perlxvf.U):
4048 This variable contains the format string used for printing
4049 a Perl NV using %g-ish floating point format.
4051 nvGUformat (perlxvf.U):
4052 This variable contains the format string used for printing
4053 a Perl NV using %G-ish floating point format.
4056 This variable is the size of an NV in bytes.
4059 This variable contains the C type used for Perl's NV.
4061 o_nonblock (nblock_io.U):
4062 This variable bears the symbol value to be used during open() or fcntl()
4063 to turn on non-blocking I/O for a file descriptor. If you wish to switch
4064 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
4065 but that is only supported by some devices.
4068 This is an old synonym for _o.
4070 old_pthread_create_joinable (d_pthrattrj.U):
4071 This variable defines the constant to use for creating joinable
4072 (aka undetached) pthreads. Unused if pthread.h defines
4073 PTHREAD_CREATE_JOINABLE. If used, possible values are
4074 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
4076 optimize (ccflags.U):
4077 This variable contains any optimizer/debugger flag that should be used.
4078 It is up to the Makefile to use it.
4080 orderlib (orderlib.U):
4081 This variable is "true" if the components of libraries must be ordered
4082 (with `lorder $* | tsort`) before placing them in an archive. Set to
4083 "false" if ranlib or ar can generate random libraries.
4085 osname (Oldconfig.U):
4086 This variable contains the operating system name (e.g. sunos,
4087 solaris, hpux, etc.). It can be useful later on for setting
4088 defaults. Any spaces are replaced with underscores. It is set
4089 to a null string if we can't figure it out.
4091 osvers (Oldconfig.U):
4092 This variable contains the operating system version (e.g.
4093 4.1.3, 5.2, etc.). It is primarily used for helping select
4094 an appropriate hints file, but might be useful elsewhere for
4095 setting defaults. It is set to '' if we can't figure it out.
4096 We try to be flexible about how much of the version number
4097 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
4098 same for this package, hints files might just be os_4.0 or
4099 os_4.1, etc., not keeping separate files for each little release.
4101 otherlibdirs (otherlibdirs.U):
4102 This variable contains a colon-separated set of paths for the perl
4103 binary to search for additional library files or modules.
4104 These directories will be tacked to the end of @INC.
4105 Perl will automatically search below each path for version-
4106 and architecture-specific directories. See inc_version_list
4108 A value of ' ' means 'none' and is used to preserve this value
4109 for the next run through Configure.
4111 package (package.U):
4112 This variable contains the name of the package being constructed.
4113 It is primarily intended for the use of later Configure units.
4116 This variable contains the name of the preferred pager on the system.
4117 Usual values are (the full pathnames of) more, less, pg, or cat.
4120 This variable contains a command that produces the text of the
4121 /etc/passwd file. This is normally "cat /etc/passwd", but can be
4122 "ypcat passwd" when NIS is used.
4123 On some systems, such as os390, there may be no equivalent
4124 command, in which case this variable is unset.
4126 patchlevel (patchlevel.U):
4127 The patchlevel level of this package.
4128 The value of patchlevel comes from the patchlevel.h file.
4129 In a version number such as 5.6.1, this is the "6".
4130 In patchlevel.h, this is referred to as "PERL_VERSION".
4133 This is an old synonym for p_ in Head.U, the character
4134 used to separate elements in the command shell search PATH.
4137 This variable is used internally by Configure to determine the
4138 full pathname (if any) of the perl program. After Configure runs,
4139 the value is reset to a plain "perl" and is not useful.
4142 This variable contains the full path (if any) to a previously
4143 installed perl5.005 or later suitable for running the script
4144 to determine inc_version_list.
4146 PERL_API_REVISION (patchlevel.h):
4147 This number describes the earliest compatible PERL_REVISION of
4148 Perl ("compatibility" here being defined as sufficient binary/API
4149 compatibility to run XS code built with the older version).
4150 Normally this does not change across maintenance releases.
4151 Please read the comment in patchlevel.h.
4153 PERL_API_SUBVERSION (patchlevel.h):
4154 This number describes the earliest compatible PERL_SUBVERSION of
4155 Perl ("compatibility" here being defined as sufficient binary/API
4156 compatibility to run XS code built with the older version).
4157 Normally this does not change across maintenance releases.
4158 Please read the comment in patchlevel.h.
4160 PERL_API_VERSION (patchlevel.h):
4161 This number describes the earliest compatible PERL_VERSION of
4162 Perl ("compatibility" here being defined as sufficient binary/API
4163 compatibility to run XS code built with the older version).
4164 Normally this does not change across maintenance releases.
4165 Please read the comment in patchlevel.h.
4167 PERL_CONFIG_SH (Oldsyms.U):
4168 This is set to 'true' in config.sh so that a shell script
4169 sourcing config.sh can tell if it has been sourced already.
4171 PERL_PATCHLEVEL (Oldsyms.U):
4172 This symbol reflects the patchlevel, if available. Will usually
4173 come from the .patch file, which is available when the perl
4174 source tree was fetched with rsync.
4176 perl_patchlevel (patchlevel.U):
4177 This is the Perl patch level, a numeric change identifier,
4178 as defined by whichever source code maintenance system
4179 is used to maintain the patches; currently Perforce.
4180 It does not correlate with the Perl version numbers or
4181 the maintenance versus development dichotomy except
4182 by also being increasing.
4184 PERL_REVISION (Oldsyms.U):
4185 In a Perl version number such as 5.6.2, this is the 5.
4186 This value is manually set in patchlevel.h
4188 perl_static_inline (d_static_inline.U):
4189 This variable defines the PERL_STATIC_INLINE symbol to
4190 the best-guess incantation to use for static inline functions.
4191 Possibilities include
4193 static __inline__ (gcc -ansi)
4194 static __inline (MSVC)
4195 static _inline (older MSVC)
4196 static (c89 compilers)
4198 PERL_SUBVERSION (Oldsyms.U):
4199 In a Perl version number such as 5.6.2, this is the 2.
4200 Values greater than 50 represent potentially unstable
4201 development subversions.
4202 This value is manually set in patchlevel.h
4204 PERL_VERSION (Oldsyms.U):
4205 In a Perl version number such as 5.6.2, this is the 6.
4206 This value is manually set in patchlevel.h
4208 perladmin (perladmin.U):
4209 Electronic mail address of the perl5 administrator.
4212 The list of libraries needed by Perl only (any libraries needed
4213 by extensions only will by dropped, if using dynamic loading).
4215 perlpath (perlpath.U):
4216 This variable contains the eventual value of the PERLPATH symbol,
4217 which contains the name of the perl interpreter to be used in
4218 shell scripts and in the "eval 'exec'" idiom. This variable is
4219 not necessarily the pathname of the file containing the perl
4220 interpreter; you must append the executable extension (_exe) if
4221 it is not already present. Note that Perl code that runs during
4222 the Perl build process cannot reference this variable, as Perl
4223 may not have been installed, or even if installed, may be a
4224 different version of Perl.
4227 This variable is used internally by Configure to determine the
4228 full pathname (if any) of the pg program. After Configure runs,
4229 the value is reset to a plain "pg" and is not useful.
4231 phostname (myhostname.U):
4232 This variable contains the eventual value of the PHOSTNAME symbol,
4233 which is a command that can be fed to popen() to get the host name.
4234 The program should probably not presume that the domain is or isn't
4237 pidtype (pidtype.U):
4238 This variable defines PIDTYPE to be something like pid_t, int,
4239 ushort, or whatever type is used to declare process ids in the kernel.
4242 Holds the private path used by Configure to find out the libraries.
4243 Its value is prepend to libpth. This variable takes care of special
4244 machines, like the mips. Usually, it should be empty.
4247 This variable is defined but not used by Configure.
4248 The value is the empty string and is not useful.
4251 This variable is defined but not used by Configure.
4252 The value is the empty string and is not useful.
4255 This variable holds the name of the directory below which the
4256 user will install the package. Usually, this is /usr/local, and
4257 executables go in /usr/local/bin, library stuff in /usr/local/lib,
4258 man pages in /usr/local/man, etc. It is only used to set defaults
4259 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
4261 prefixexp (prefix.U):
4262 This variable holds the full absolute path of the directory below
4263 which the user will install the package. Derived from prefix.
4265 privlib (privlib.U):
4266 This variable contains the eventual value of the PRIVLIB symbol,
4267 which is the name of the private library for this package. It may
4268 have a ~ on the front. It is up to the makefile to eventually create
4269 this directory while performing installation (with ~ substitution).
4271 privlibexp (privlib.U):
4272 This variable is the ~name expanded version of privlib, so that you
4273 may use it directly in Makefiles or shell scripts.
4275 procselfexe (d_procselfexe.U):
4276 If d_procselfexe is defined, $procselfexe is the filename
4277 of the symbolic link pointing to the absolute pathname of
4278 the executing program.
4280 prototype (prototype.U):
4281 This variable holds the eventual value of CAN_PROTOTYPE, which
4282 indicates the C compiler can handle function prototypes.
4284 ptrsize (ptrsize.U):
4285 This variable contains the value of the PTRSIZE symbol, which
4286 indicates to the C program how many bytes there are in a pointer.
4288 quadkind (quadtype.U):
4289 This variable, if defined, encodes the type of a quad:
4290 1 = int, 2 = long, 3 = long long, 4 = int64_t.
4292 quadtype (quadtype.U):
4293 This variable defines Quad_t to be something like long, int,
4294 long long, int64_t, or whatever type is used for 64-bit integers.
4296 randbits (randfunc.U):
4297 Indicates how many bits are produced by the function used to
4298 generate normalized random numbers.
4300 randfunc (randfunc.U):
4301 Indicates the name of the random number function to use.
4302 Values include drand48, random, and rand. In C programs,
4303 the 'Drand01' macro is defined to generate uniformly distributed
4304 random numbers over the range [0., 1.[ (see drand01 and nrand).
4306 random_r_proto (d_random_r.U):
4307 This variable encodes the prototype of random_r.
4308 It is zero if d_random_r is undef, and one of the
4309 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
4312 randseedtype (randfunc.U):
4313 Indicates the type of the argument of the seedfunc.
4315 ranlib (orderlib.U):
4316 This variable is set to the pathname of the ranlib program, if it is
4317 needed to generate random libraries. Set to ":" if ar can generate
4318 random libraries or if random libraries are not supported
4320 rd_nodata (nblock_io.U):
4321 This variable holds the return code from read() when no data is
4322 present. It should be -1, but some systems return 0 when O_NDELAY is
4323 used, which is a shame because you cannot make the difference between
4324 no data and an EOF.. Sigh!
4326 readdir64_r_proto (d_readdir64_r.U):
4327 This variable encodes the prototype of readdir64_r.
4328 It is zero if d_readdir64_r is undef, and one of the
4329 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
4332 readdir_r_proto (d_readdir_r.U):
4333 This variable encodes the prototype of readdir_r.
4334 It is zero if d_readdir_r is undef, and one of the
4335 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
4338 revision (patchlevel.U):
4339 The value of revision comes from the patchlevel.h file.
4340 In a version number such as 5.6.1, this is the "5".
4341 In patchlevel.h, this is referred to as "PERL_REVISION".
4344 This variable is used internally by Configure to determine the
4345 full pathname (if any) of the rm program. After Configure runs,
4346 the value is reset to a plain "rm" and is not useful.
4349 This is a cleanup variable for try test programs.
4350 Internal Configure use only.
4353 This variable is defined but not used by Configure.
4354 The value is the empty string and is not useful.
4357 This variable contains the command used by Configure
4358 to copy and execute a cross-compiled executable in the
4359 target host. Useful and available only during Perl build.
4360 Empty string '' if not cross-compiling.
4363 This variable contains 'true' or 'false' depending whether the
4364 nm extraction should be performed or not, according to the value
4365 of usenm and the flags on the Configure command line.
4367 sched_yield (d_pthread_y.U):
4368 This variable defines the way to yield the execution
4369 of the current thread.
4371 scriptdir (scriptdir.U):
4372 This variable holds the name of the directory in which the user wants
4373 to put publicly scripts for the package in question. It is either
4374 the same directory as for binaries, or a special one that can be
4375 mounted across different architectures, like /usr/share. Programs
4376 must be prepared to deal with ~name expansion.
4378 scriptdirexp (scriptdir.U):
4379 This variable is the same as scriptdir, but is filename expanded
4380 at configuration time, for programs not wanting to bother with it.
4383 This variable is used internally by Configure to determine the
4384 full pathname (if any) of the sed program. After Configure runs,
4385 the value is reset to a plain "sed" and is not useful.
4387 seedfunc (randfunc.U):
4388 Indicates the random number generating seed function.
4389 Values include srand48, srandom, and srand.
4391 selectminbits (selectminbits.U):
4392 This variable holds the minimum number of bits operated by select.
4393 That is, if you do select(n, ...), how many bits at least will be
4394 cleared in the masks if some activity is detected. Usually this
4395 is either n or 32*ceil(n/32), especially many little-endians do
4396 the latter. This is only useful if you have select(), naturally.
4398 selecttype (selecttype.U):
4399 This variable holds the type used for the 2nd, 3rd, and 4th
4400 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
4401 is defined, and 'int *' otherwise. This is only useful if you
4402 have select(), naturally.
4405 This variable is defined but not used by Configure.
4406 The value is the empty string and is not useful.
4408 setgrent_r_proto (d_setgrent_r.U):
4409 This variable encodes the prototype of setgrent_r.
4410 It is zero if d_setgrent_r is undef, and one of the
4411 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r
4414 sethostent_r_proto (d_sethostent_r.U):
4415 This variable encodes the prototype of sethostent_r.
4416 It is zero if d_sethostent_r is undef, and one of the
4417 REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r
4420 setlocale_r_proto (d_setlocale_r.U):
4421 This variable encodes the prototype of setlocale_r.
4422 It is zero if d_setlocale_r is undef, and one of the
4423 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r
4426 setnetent_r_proto (d_setnetent_r.U):
4427 This variable encodes the prototype of setnetent_r.
4428 It is zero if d_setnetent_r is undef, and one of the
4429 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r
4432 setprotoent_r_proto (d_setprotoent_r.U):
4433 This variable encodes the prototype of setprotoent_r.
4434 It is zero if d_setprotoent_r is undef, and one of the
4435 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r
4438 setpwent_r_proto (d_setpwent_r.U):
4439 This variable encodes the prototype of setpwent_r.
4440 It is zero if d_setpwent_r is undef, and one of the
4441 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r
4444 setservent_r_proto (d_setservent_r.U):
4445 This variable encodes the prototype of setservent_r.
4446 It is zero if d_setservent_r is undef, and one of the
4447 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r
4450 sGMTIME_max (time_size.U):
4451 This variable defines the maximum value of the time_t offset that
4452 the system function gmtime () accepts
4454 sGMTIME_min (time_size.U):
4455 This variable defines the minimum value of the time_t offset that
4456 the system function gmtime () accepts
4459 This variable contains the full pathname of the shell used
4460 on this system to execute Bourne shell scripts. Usually, this will be
4461 /bin/sh, though it's possible that some systems will have /bin/ksh,
4462 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
4464 This unit comes before Options.U, so you can't set sh with a '-D'
4465 option, though you can override this (and startsh)
4466 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
4469 This variable is defined but not used by Configure.
4470 The value is the empty string and is not useful.
4472 sharpbang (spitshell.U):
4473 This variable contains the string #! if this system supports that
4476 shmattype (d_shmat.U):
4477 This symbol contains the type of pointer returned by shmat().
4478 It can be 'void *' or 'char *'.
4480 shortsize (intsize.U):
4481 This variable contains the value of the SHORTSIZE symbol which
4482 indicates to the C program how many bytes there are in a short.
4484 shrpenv (libperl.U):
4485 If the user builds a shared libperl.so, then we need to tell the
4486 'perl' executable where it will be able to find the installed libperl.so.
4487 One way to do this on some systems is to set the environment variable
4488 LD_RUN_PATH to the directory that will be the final location of the
4489 shared libperl.so. The makefile can use this with something like
4490 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
4492 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
4495 See the main perl Makefile.SH for actual working usage.
4496 Alternatively, we might be able to use a command line option such
4497 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
4498 $archlibexp/CORE (Linux).
4500 shsharp (spitshell.U):
4501 This variable tells further Configure units whether your sh can
4504 sig_count (sig_name.U):
4505 This variable holds a number larger than the largest valid
4506 signal number. This is usually the same as the NSIG macro.
4508 sig_name (sig_name.U):
4509 This variable holds the signal names, space separated. The leading
4510 SIG in signal name is removed. A ZERO is prepended to the list.
4511 This is currently not used, sig_name_init is used instead.
4513 sig_name_init (sig_name.U):
4514 This variable holds the signal names, enclosed in double quotes and
4515 separated by commas, suitable for use in the SIG_NAME definition
4516 below. A "ZERO" is prepended to the list, and the list is
4517 terminated with a plain 0. The leading SIG in signal names
4518 is removed. See sig_num.
4520 sig_num (sig_name.U):
4521 This variable holds the signal numbers, space separated. A ZERO is
4522 prepended to the list (corresponding to the fake SIGZERO).
4523 Those numbers correspond to the value of the signal listed
4524 in the same place within the sig_name list.
4525 This is currently not used, sig_num_init is used instead.
4527 sig_num_init (sig_name.U):
4528 This variable holds the signal numbers, enclosed in double quotes and
4529 separated by commas, suitable for use in the SIG_NUM definition
4530 below. A "ZERO" is prepended to the list, and the list is
4531 terminated with a plain 0.
4533 sig_size (sig_name.U):
4534 This variable contains the number of elements of the sig_name
4537 signal_t (d_voidsig.U):
4538 This variable holds the type of the signal handler (void or int).
4540 sitearch (sitearch.U):
4541 This variable contains the eventual value of the SITEARCH symbol,
4542 which is the name of the private library for this package. It may
4543 have a ~ on the front. It is up to the makefile to eventually create
4544 this directory while performing installation (with ~ substitution).
4545 The standard distribution will put nothing in this directory.
4546 After perl has been installed, users may install their own local
4547 architecture-dependent modules in this directory with
4548 MakeMaker Makefile.PL
4549 or equivalent. See INSTALL for details.
4551 sitearchexp (sitearch.U):
4552 This variable is the ~name expanded version of sitearch, so that you
4553 may use it directly in Makefiles or shell scripts.
4555 sitebin (sitebin.U):
4556 This variable holds the name of the directory in which the user wants
4557 to put add-on publicly executable files for the package in question. It
4558 is most often a local directory such as /usr/local/bin. Programs using
4559 this variable must be prepared to deal with ~name substitution.
4560 The standard distribution will put nothing in this directory.
4561 After perl has been installed, users may install their own local
4562 executables in this directory with
4563 MakeMaker Makefile.PL
4564 or equivalent. See INSTALL for details.
4566 sitebinexp (sitebin.U):
4567 This is the same as the sitebin variable, but is filename expanded at
4568 configuration time, for use in your makefiles.
4570 sitehtml1dir (sitehtml1dir.U):
4571 This variable contains the name of the directory in which site-specific
4572 html source pages are to be put. It is the responsibility of the
4573 Makefile.SH to get the value of this into the proper command.
4574 You must be prepared to do the ~name expansion yourself.
4575 The standard distribution will put nothing in this directory.
4576 After perl has been installed, users may install their own local
4577 html pages in this directory with
4578 MakeMaker Makefile.PL
4579 or equivalent. See INSTALL for details.
4581 sitehtml1direxp (sitehtml1dir.U):
4582 This variable is the same as the sitehtml1dir variable, but is filename
4583 expanded at configuration time, for convenient use in makefiles.
4585 sitehtml3dir (sitehtml3dir.U):
4586 This variable contains the name of the directory in which site-specific
4587 library html source pages are to be put. It is the responsibility of the
4588 Makefile.SH to get the value of this into the proper command.
4589 You must be prepared to do the ~name expansion yourself.
4590 The standard distribution will put nothing in this directory.
4591 After perl has been installed, users may install their own local
4592 library html pages in this directory with
4593 MakeMaker Makefile.PL
4594 or equivalent. See INSTALL for details.
4596 sitehtml3direxp (sitehtml3dir.U):
4597 This variable is the same as the sitehtml3dir variable, but is filename
4598 expanded at configuration time, for convenient use in makefiles.
4600 sitelib (sitelib.U):
4601 This variable contains the eventual value of the SITELIB symbol,
4602 which is the name of the private library for this package. It may
4603 have a ~ on the front. It is up to the makefile to eventually create
4604 this directory while performing installation (with ~ substitution).
4605 The standard distribution will put nothing in this directory.
4606 After perl has been installed, users may install their own local
4607 architecture-independent modules in this directory with
4608 MakeMaker Makefile.PL
4609 or equivalent. See INSTALL for details.
4611 sitelib_stem (sitelib.U):
4612 This variable is $sitelibexp with any trailing version-specific component
4613 removed. The elements in inc_version_list (inc_version_list.U) can
4614 be tacked onto this variable to generate a list of directories to search.
4616 sitelibexp (sitelib.U):
4617 This variable is the ~name expanded version of sitelib, so that you
4618 may use it directly in Makefiles or shell scripts.
4620 siteman1dir (siteman1dir.U):
4621 This variable contains the name of the directory in which site-specific
4622 manual source pages are to be put. It is the responsibility of the
4623 Makefile.SH to get the value of this into the proper command.
4624 You must be prepared to do the ~name expansion yourself.
4625 The standard distribution will put nothing in this directory.
4626 After perl has been installed, users may install their own local
4627 man1 pages in this directory with
4628 MakeMaker Makefile.PL
4629 or equivalent. See INSTALL for details.
4631 siteman1direxp (siteman1dir.U):
4632 This variable is the same as the siteman1dir variable, but is filename
4633 expanded at configuration time, for convenient use in makefiles.
4635 siteman3dir (siteman3dir.U):
4636 This variable contains the name of the directory in which site-specific
4637 library man source pages are to be put. It is the responsibility of the
4638 Makefile.SH to get the value of this into the proper command.
4639 You must be prepared to do the ~name expansion yourself.
4640 The standard distribution will put nothing in this directory.
4641 After perl has been installed, users may install their own local
4642 man3 pages in this directory with
4643 MakeMaker Makefile.PL
4644 or equivalent. See INSTALL for details.
4646 siteman3direxp (siteman3dir.U):
4647 This variable is the same as the siteman3dir variable, but is filename
4648 expanded at configuration time, for convenient use in makefiles.
4650 siteprefix (siteprefix.U):
4651 This variable holds the full absolute path of the directory below
4652 which the user will install add-on packages.
4653 See INSTALL for usage and examples.
4655 siteprefixexp (siteprefix.U):
4656 This variable holds the full absolute path of the directory below
4657 which the user will install add-on packages. Derived from siteprefix.
4659 sitescript (sitescript.U):
4660 This variable holds the name of the directory in which the user wants
4661 to put add-on publicly executable files for the package in question. It
4662 is most often a local directory such as /usr/local/bin. Programs using
4663 this variable must be prepared to deal with ~name substitution.
4664 The standard distribution will put nothing in this directory.
4665 After perl has been installed, users may install their own local
4666 scripts in this directory with
4667 MakeMaker Makefile.PL
4668 or equivalent. See INSTALL for details.
4670 sitescriptexp (sitescript.U):
4671 This is the same as the sitescript variable, but is filename expanded at
4672 configuration time, for use in your makefiles.
4674 sizesize (sizesize.U):
4675 This variable contains the size of a sizetype in bytes.
4677 sizetype (sizetype.U):
4678 This variable defines sizetype to be something like size_t,
4679 unsigned long, or whatever type is used to declare length
4680 parameters for string functions.
4683 This variable is defined but not used by Configure.
4684 The value is the empty string and is not useful.
4686 sLOCALTIME_max (time_size.U):
4687 This variable defines the maximum value of the time_t offset that
4688 the system function localtime () accepts
4690 sLOCALTIME_min (time_size.U):
4691 This variable defines the minimum value of the time_t offset that
4692 the system function localtime () accepts
4695 This variable is defined but not used by Configure.
4696 The value is the empty string and is not useful.
4699 This variable holds the extension used to identify shared libraries
4700 (also known as shared objects) on the system. Usually set to 'so'.
4702 sockethdr (d_socket.U):
4703 This variable has any cpp '-I' flags needed for socket support.
4705 socketlib (d_socket.U):
4706 This variable has the names of any libraries needed for socket support.
4708 socksizetype (socksizetype.U):
4709 This variable holds the type used for the size argument
4710 for various socket calls like accept. Usual values include
4711 socklen_t, size_t, and int.
4714 This variable is used internally by Configure to determine the
4715 full pathname (if any) of the sort program. After Configure runs,
4716 the value is reset to a plain "sort" and is not useful.
4718 spackage (package.U):
4719 This variable contains the name of the package being constructed,
4720 with the first letter uppercased, i.e. suitable for starting
4723 spitshell (spitshell.U):
4724 This variable contains the command necessary to spit out a runnable
4725 shell on this system. It is either cat or a grep '-v' for # comments.
4727 sPRId64 (quadfio.U):
4728 This variable, if defined, contains the string used by stdio to
4729 format 64-bit decimal numbers (format 'd') for output.
4731 sPRIeldbl (longdblfio.U):
4732 This variable, if defined, contains the string used by stdio to
4733 format long doubles (format 'e') for output.
4735 sPRIEUldbl (longdblfio.U):
4736 This variable, if defined, contains the string used by stdio to
4737 format long doubles (format 'E') for output.
4738 The 'U' in the name is to separate this from sPRIeldbl so that even
4739 case-blind systems can see the difference.
4741 sPRIfldbl (longdblfio.U):
4742 This variable, if defined, contains the string used by stdio to
4743 format long doubles (format 'f') for output.
4745 sPRIFUldbl (longdblfio.U):
4746 This variable, if defined, contains the string used by stdio to
4747 format long doubles (format 'F') for output.
4748 The 'U' in the name is to separate this from sPRIfldbl so that even
4749 case-blind systems can see the difference.
4751 sPRIgldbl (longdblfio.U):
4752 This variable, if defined, contains the string used by stdio to
4753 format long doubles (format 'g') for output.
4755 sPRIGUldbl (longdblfio.U):
4756 This variable, if defined, contains the string used by stdio to
4757 format long doubles (format 'G') for output.
4758 The 'U' in the name is to separate this from sPRIgldbl so that even
4759 case-blind systems can see the difference.
4761 sPRIi64 (quadfio.U):
4762 This variable, if defined, contains the string used by stdio to
4763 format 64-bit decimal numbers (format 'i') for output.
4765 sPRIo64 (quadfio.U):
4766 This variable, if defined, contains the string used by stdio to
4767 format 64-bit octal numbers (format 'o') for output.
4769 sPRIu64 (quadfio.U):
4770 This variable, if defined, contains the string used by stdio to
4771 format 64-bit unsigned decimal numbers (format 'u') for output.
4773 sPRIx64 (quadfio.U):
4774 This variable, if defined, contains the string used by stdio to
4775 format 64-bit hexadecimal numbers (format 'x') for output.
4777 sPRIXU64 (quadfio.U):
4778 This variable, if defined, contains the string used by stdio to
4779 format 64-bit hExADECimAl numbers (format 'X') for output.
4780 The 'U' in the name is to separate this from sPRIx64 so that even
4781 case-blind systems can see the difference.
4783 srand48_r_proto (d_srand48_r.U):
4784 This variable encodes the prototype of srand48_r.
4785 It is zero if d_srand48_r is undef, and one of the
4786 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srand48_r
4789 srandom_r_proto (d_srandom_r.U):
4790 This variable encodes the prototype of srandom_r.
4791 It is zero if d_srandom_r is undef, and one of the
4792 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srandom_r
4796 This variable holds the (possibly relative) path of the package source.
4797 It is up to the Makefile to use this variable and set VPATH accordingly
4798 to find the sources remotely. Use $pkgsrc to have an absolute path.
4800 sSCNfldbl (longdblfio.U):
4801 This variable, if defined, contains the string used by stdio to
4802 format long doubles (format 'f') for input.
4804 ssizetype (ssizetype.U):
4805 This variable defines ssizetype to be something like ssize_t,
4806 long or int. It is used by functions that return a count
4807 of bytes or an error condition. It must be a signed type.
4808 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
4810 st_ino_sign (st_ino_def.U):
4811 This variable contains the signedness of struct stat's st_ino.
4812 1 for unsigned, -1 for signed.
4814 st_ino_size (st_ino_def.U):
4815 This variable contains the size of struct stat's st_ino in bytes.
4817 startperl (startperl.U):
4818 This variable contains the string to put on the front of a perl
4819 script to make sure (hopefully) that it runs with perl and not some
4820 shell. Of course, that leading line must be followed by the classical
4822 eval 'exec perl -S $0 ${1+"$@"}'
4823 if $running_under_some_shell;
4824 to guarantee perl startup should the shell execute the script. Note
4825 that this magic incantation is not understood by csh.
4827 startsh (startsh.U):
4828 This variable contains the string to put on the front of a shell
4829 script to make sure (hopefully) that it runs with sh and not some
4832 static_ext (Extensions.U):
4833 This variable holds a list of XS extension files we want to
4834 link statically into the package. It is used by Makefile.
4836 stdchar (stdchar.U):
4837 This variable conditionally defines STDCHAR to be the type of char
4838 used in stdio.h. It has the values "unsigned char" or "char".
4840 stdio_base (d_stdstdio.U):
4841 This variable defines how, given a FILE pointer, fp, to access the
4842 _base field (or equivalent) of stdio.h's FILE structure. This will
4843 be used to define the macro FILE_base(fp).
4845 stdio_bufsiz (d_stdstdio.U):
4846 This variable defines how, given a FILE pointer, fp, to determine
4847 the number of bytes store in the I/O buffer pointer to by the
4848 _base field (or equivalent) of stdio.h's FILE structure. This will
4849 be used to define the macro FILE_bufsiz(fp).
4851 stdio_cnt (d_stdstdio.U):
4852 This variable defines how, given a FILE pointer, fp, to access the
4853 _cnt field (or equivalent) of stdio.h's FILE structure. This will
4854 be used to define the macro FILE_cnt(fp).
4856 stdio_filbuf (d_stdstdio.U):
4857 This variable defines how, given a FILE pointer, fp, to tell
4858 stdio to refill its internal buffers (?). This will
4859 be used to define the macro FILE_filbuf(fp).
4861 stdio_ptr (d_stdstdio.U):
4862 This variable defines how, given a FILE pointer, fp, to access the
4863 _ptr field (or equivalent) of stdio.h's FILE structure. This will
4864 be used to define the macro FILE_ptr(fp).
4866 stdio_stream_array (stdio_streams.U):
4867 This variable tells the name of the array holding the stdio streams.
4868 Usual values include _iob, __iob, and __sF.
4870 strerror_r_proto (d_strerror_r.U):
4871 This variable encodes the prototype of strerror_r.
4872 It is zero if d_strerror_r is undef, and one of the
4873 REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r
4876 strings (i_string.U):
4877 This variable holds the full path of the string header that will be
4878 used. Typically /usr/include/string.h or /usr/include/strings.h.
4881 This variable is defined but not used by Configure.
4882 The value is the empty string and is not useful.
4884 subversion (patchlevel.U):
4885 The subversion level of this package.
4886 The value of subversion comes from the patchlevel.h file.
4887 In a version number such as 5.6.1, this is the "1".
4888 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
4889 This is unique to perl.
4892 This variable holds the place where the manual is located on this
4893 system. It is not the place where the user wants to put his manual
4894 pages. Rather it is the place where Configure may look to find manual
4895 for unix commands (section 1 of the manual usually). See mansrc.
4897 sysroot (Sysroot.U):
4898 This variable is empty unless supplied by the Configure user.
4899 It can contain a path to an alternative root directory, under which
4900 headers and libraries for the compilation target can be found. This
4901 is generally used when cross-compiling using a gcc-like compiler.
4904 This variable is defined but not used by Configure.
4905 The value is the empty string and is not useful.
4908 This variable is defined but not used by Configure.
4909 The value is the empty string and is not useful.
4911 targetarch (Cross.U):
4912 If cross-compiling, this variable contains the target architecture.
4913 If not, this will be empty.
4915 targetdir (Cross.U):
4916 This variable contains a path that will be created on the target
4917 host using targetmkdir, and then used to copy the cross-compiled
4918 executables to. Defaults to '/tmp' if not set.
4920 targetenv (Cross.U):
4921 If cross-compiling, this variable can be used to modify the
4922 environment on the target system.
4923 However, how and where it's used, and even if it's used at all, is
4924 entirely dependent on both the transport mechanism (targetrun) and
4925 what the target system is. Unless the relevant documentation says
4926 otherwise, it is genereally not useful.
4928 targethost (Cross.U):
4929 This variable contains the name of a separate host machine that
4930 can be used to run compiled test programs and perl tests on.
4931 Set to empty string if not in use.
4933 targetmkdir (Cross.U):
4934 This variable contains the command used by Configure to create a
4935 new directory on the target host.
4937 targetport (Cross.U):
4938 This variable contains the number of a network port to be used to
4939 connect to the host in targethost, if unset defaults to 22 for ssh.
4942 If cross-compiling, this variable contains the location of sh on the
4944 If not, this will be the same as $sh.
4947 This variable is defined but not used by Configure.
4948 The value is the empty string and is not useful.
4951 This variable is defined but not used by Configure.
4952 The value is the empty string and is not useful.
4955 This variable is used internally by Configure to determine the
4956 full pathname (if any) of the test program. After Configure runs,
4957 the value is reset to a plain "test" and is not useful.
4959 timeincl (i_time.U):
4960 This variable holds the full path of the included time header(s).
4962 timetype (d_time.U):
4963 This variable holds the type returned by time(). It can be long,
4964 or time_t on BSD sites (in which case <sys/types.h> should be
4965 included). Anyway, the type Time_t should be used.
4967 tmpnam_r_proto (d_tmpnam_r.U):
4968 This variable encodes the prototype of tmpnam_r.
4969 It is zero if d_tmpnam_r is undef, and one of the
4970 REENTRANT_PROTO_T_ABC macros of reentr.h if d_tmpnam_r
4974 This variable contains the command used by Configure
4975 to copy to from the target host. Useful and available
4976 only during Perl build.
4977 The string ':' if not cross-compiling.
4980 This variable is used internally by Configure to determine the
4981 full pathname (if any) of the touch program. After Configure runs,
4982 the value is reset to a plain "touch" and is not useful.
4985 This variable is used internally by Configure to determine the
4986 full pathname (if any) of the tr program. After Configure runs,
4987 the value is reset to a plain "tr" and is not useful.
4990 This variable contains the value to be passed to the tr(1)
4991 command to transliterate a newline. Typical values are
4992 '\012' and '\n'. This is needed for EBCDIC systems where
4993 newline is not necessarily '\012'.
4996 This variable is defined but not used by Configure.
4997 The value is the empty string and is not useful.
4999 ttyname_r_proto (d_ttyname_r.U):
5000 This variable encodes the prototype of ttyname_r.
5001 It is zero if d_ttyname_r is undef, and one of the
5002 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ttyname_r
5006 This variable is the size of an U16 in bytes.
5009 This variable contains the C type used for Perl's U16.
5012 This variable is the size of an U32 in bytes.
5015 This variable contains the C type used for Perl's U32.
5018 This variable is the size of an U64 in bytes.
5021 This variable contains the C type used for Perl's U64.
5024 This variable is the size of an U8 in bytes.
5027 This variable contains the C type used for Perl's U8.
5030 This variable contains the format string used for printing a Uid_t.
5032 uidsign (uidsign.U):
5033 This variable contains the signedness of a uidtype.
5034 1 for unsigned, -1 for signed.
5036 uidsize (uidsize.U):
5037 This variable contains the size of a uidtype in bytes.
5039 uidtype (uidtype.U):
5040 This variable defines Uid_t to be something like uid_t, int,
5041 ushort, or whatever type is used to declare user ids in the kernel.
5044 This variable is used internally by Configure to determine the
5045 full pathname (if any) of the uname program. After Configure runs,
5046 the value is reset to a plain "uname" and is not useful.
5049 This variable is used internally by Configure to determine the
5050 full pathname (if any) of the uniq program. After Configure runs,
5051 the value is reset to a plain "uniq" and is not useful.
5053 uquadtype (quadtype.U):
5054 This variable defines Uquad_t to be something like unsigned long,
5055 unsigned int, unsigned long long, uint64_t, or whatever type is
5056 used for 64-bit integers.
5058 use5005threads (usethreads.U):
5059 This variable conditionally defines the USE_5005THREADS symbol,
5060 and indicates that Perl should be built to use the 5.005-based
5061 threading implementation. Only valid up to 5.8.x.
5063 use64bitall (use64bits.U):
5064 This variable conditionally defines the USE_64_BIT_ALL symbol,
5065 and indicates that 64-bit integer types should be used
5066 when available. The maximal possible
5067 64-bitness is employed: LP64 or ILP64, meaning that you will
5068 be able to use more than 2 gigabytes of memory. This mode is
5069 even more binary incompatible than USE_64_BIT_INT. You may not
5070 be able to run the resulting executable in a 32-bit CPU at all or
5071 you may need at least to reboot your OS to 64-bit mode.
5073 use64bitint (use64bits.U):
5074 This variable conditionally defines the USE_64_BIT_INT symbol,
5075 and indicates that 64-bit integer types should be used
5076 when available. The minimal possible 64-bitness
5077 is employed, just enough to get 64-bit integers into Perl.
5078 This may mean using for example "long longs", while your memory
5079 may still be limited to 2 gigabytes.
5081 usecrosscompile (Cross.U):
5082 This variable conditionally defines the USE_CROSS_COMPILE symbol,
5083 and indicates that Perl has been cross-compiled.
5086 This variable indicates that Perl was configured with development
5087 features enabled. This should not be done for production builds.
5090 This variable indicates if the system supports dynamic
5091 loading of some sort. See also dlsrc and dlobj.
5093 usedtrace (usedtrace.U):
5094 This variable indicates whether we are compiling with dtrace
5095 support. See also dtrace.
5097 usefaststdio (usefaststdio.U):
5098 This variable conditionally defines the USE_FAST_STDIO symbol,
5099 and indicates that Perl should be built to use 'fast stdio'.
5100 Defaults to define in Perls 5.8 and earlier, to undef later.
5102 useithreads (usethreads.U):
5103 This variable conditionally defines the USE_ITHREADS symbol,
5104 and indicates that Perl should be built to use the interpreter-based
5105 threading implementation.
5107 usekernprocpathname (usekernprocpathname.U):
5108 This variable, indicates that we can use sysctl with
5109 KERN_PROC_PATHNAME to get a full path for the executable, and hence
5110 convert $^X to an absolute path.
5112 uselargefiles (uselfs.U):
5113 This variable conditionally defines the USE_LARGE_FILES symbol,
5114 and indicates that large file interfaces should be used when
5117 uselongdouble (uselongdbl.U):
5118 This variable conditionally defines the USE_LONG_DOUBLE symbol,
5119 and indicates that long doubles should be used when available.
5121 usemallocwrap (mallocsrc.U):
5122 This variable contains y if we are wrapping malloc to prevent
5123 integer overflow during size calculations.
5125 usemorebits (usemorebits.U):
5126 This variable conditionally defines the USE_MORE_BITS symbol,
5127 and indicates that explicit 64-bit interfaces and long doubles
5128 should be used when available.
5130 usemultiplicity (usemultiplicity.U):
5131 This variable conditionally defines the MULTIPLICITY symbol,
5132 and indicates that Perl should be built to use multiplicity.
5134 usemymalloc (mallocsrc.U):
5135 This variable contains y if the malloc that comes with this package
5136 is desired over the system's version of malloc. People often include
5137 special versions of malloc for efficiency, but such versions are often
5138 less portable. See also mallocsrc and mallocobj.
5139 If this is 'y', then -lmalloc is removed from $libs.
5142 This variable contains 'true' or 'false' depending whether the
5143 nm extraction is wanted or not.
5145 usensgetexecutablepath (usensgetexecutablepath.U):
5146 This symbol, if defined, indicates that we can use _NSGetExecutablePath
5147 and realpath to get a full path for the executable, and hence convert
5148 $^X to an absolute path.
5150 useopcode (Extensions.U):
5151 This variable holds either 'true' or 'false' to indicate
5152 whether the Opcode extension should be used. The sole
5153 use for this currently is to allow an easy mechanism
5154 for users to skip the Opcode extension from the Configure
5157 useperlio (useperlio.U):
5158 This variable conditionally defines the USE_PERLIO symbol,
5159 and indicates that the PerlIO abstraction should be
5162 useposix (Extensions.U):
5163 This variable holds either 'true' or 'false' to indicate
5164 whether the POSIX extension should be used. The sole
5165 use for this currently is to allow an easy mechanism
5166 for hints files to indicate that POSIX will not compile
5167 on a particular system.
5169 usereentrant (usethreads.U):
5170 This variable conditionally defines the USE_REENTRANT_API symbol,
5171 which indicates that the thread code may try to use the various
5172 _r versions of library functions. This is only potentially
5173 meaningful if usethreads is set and is very experimental, it is
5174 not even prompted for.
5176 userelocatableinc (bin.U):
5177 This variable is set to true to indicate that perl should relocate
5178 @INC entries at runtime based on the path to the perl binary.
5179 Any @INC paths starting ".../" are relocated relative to the directory
5180 containing the perl binary, and a logical cleanup of the path is then
5181 made around the join point (removing "dir/../" pairs)
5183 useshrplib (libperl.U):
5184 This variable is set to 'true' if the user wishes
5185 to build a shared libperl, and 'false' otherwise.
5187 usesitecustomize (d_sitecustomize.U):
5188 This variable is set to true when the user requires a mechanism that
5189 allows the sysadmin to add entries to @INC at runtime. This variable
5190 being set, makes perl run '$sitelib/sitecustomize.pl' at startup.
5192 usesocks (usesocks.U):
5193 This variable conditionally defines the USE_SOCKS symbol,
5194 and indicates that Perl should be built to use SOCKS.
5196 usethreads (usethreads.U):
5197 This variable conditionally defines the USE_THREADS symbol,
5198 and indicates that Perl should be built to use threads.
5200 usevendorprefix (vendorprefix.U):
5201 This variable tells whether the vendorprefix
5202 and consequently other vendor* paths are in use.
5204 useversionedarchname (archname.U):
5205 This variable indicates whether to include the $api_versionstring
5206 as a component of the $archname.
5208 usevfork (d_vfork.U):
5209 This variable is set to true when the user accepts to use vfork.
5210 It is set to false when no vfork is available or when the user
5211 explicitly requests not to use vfork.
5214 This variable holds the path of the include files, which is
5215 usually /usr/include. It is mainly used by other Configure units.
5218 This variable is defined but not used by Configure.
5219 The value is the empty string and is not useful.
5221 uvoformat (perlxvf.U):
5222 This variable contains the format string used for printing
5223 a Perl UV as an unsigned octal integer.
5226 This variable is the size of a UV in bytes.
5229 This variable contains the C type used for Perl's UV.
5231 uvuformat (perlxvf.U):
5232 This variable contains the format string used for printing
5233 a Perl UV as an unsigned decimal integer.
5235 uvxformat (perlxvf.U):
5236 This variable contains the format string used for printing
5237 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
5239 uvXUformat (perlxvf.U):
5240 This variable contains the format string used for printing
5241 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
5243 vaproto (vaproto.U):
5244 This variable conditionally defines CAN_VAPROTO on systems supporting
5245 prototype declaration of functions with a variable number of
5246 arguments. See also prototype.
5248 vendorarch (vendorarch.U):
5249 This variable contains the value of the PERL_VENDORARCH symbol.
5250 It may have a ~ on the front.
5251 The standard distribution will put nothing in this directory.
5252 Vendors who distribute perl may wish to place their own
5253 architecture-dependent modules and extensions in this directory with
5254 MakeMaker Makefile.PL INSTALLDIRS=vendor
5255 or equivalent. See INSTALL for details.
5257 vendorarchexp (vendorarch.U):
5258 This variable is the ~name expanded version of vendorarch, so that you
5259 may use it directly in Makefiles or shell scripts.
5261 vendorbin (vendorbin.U):
5262 This variable contains the eventual value of the VENDORBIN symbol.
5263 It may have a ~ on the front.
5264 The standard distribution will put nothing in this directory.
5265 Vendors who distribute perl may wish to place additional
5266 binaries in this directory with
5267 MakeMaker Makefile.PL INSTALLDIRS=vendor
5268 or equivalent. See INSTALL for details.
5270 vendorbinexp (vendorbin.U):
5271 This variable is the ~name expanded version of vendorbin, so that you
5272 may use it directly in Makefiles or shell scripts.
5274 vendorhtml1dir (vendorhtml1dir.U):
5275 This variable contains the name of the directory for html
5276 pages. It may have a ~ on the front.
5277 The standard distribution will put nothing in this directory.
5278 Vendors who distribute perl may wish to place their own
5279 html pages in this directory with
5280 MakeMaker Makefile.PL INSTALLDIRS=vendor
5281 or equivalent. See INSTALL for details.
5283 vendorhtml1direxp (vendorhtml1dir.U):
5284 This variable is the ~name expanded version of vendorhtml1dir, so that you
5285 may use it directly in Makefiles or shell scripts.
5287 vendorhtml3dir (vendorhtml3dir.U):
5288 This variable contains the name of the directory for html
5289 library pages. It may have a ~ on the front.
5290 The standard distribution will put nothing in this directory.
5291 Vendors who distribute perl may wish to place their own
5292 html pages for modules and extensions in this directory with
5293 MakeMaker Makefile.PL INSTALLDIRS=vendor
5294 or equivalent. See INSTALL for details.
5296 vendorhtml3direxp (vendorhtml3dir.U):
5297 This variable is the ~name expanded version of vendorhtml3dir, so that you
5298 may use it directly in Makefiles or shell scripts.
5300 vendorlib (vendorlib.U):
5301 This variable contains the eventual value of the VENDORLIB symbol,
5302 which is the name of the private library for this package.
5303 The standard distribution will put nothing in this directory.
5304 Vendors who distribute perl may wish to place their own
5305 modules in this directory with
5306 MakeMaker Makefile.PL INSTALLDIRS=vendor
5307 or equivalent. See INSTALL for details.
5309 vendorlib_stem (vendorlib.U):
5310 This variable is $vendorlibexp with any trailing version-specific component
5311 removed. The elements in inc_version_list (inc_version_list.U) can
5312 be tacked onto this variable to generate a list of directories to search.
5314 vendorlibexp (vendorlib.U):
5315 This variable is the ~name expanded version of vendorlib, so that you
5316 may use it directly in Makefiles or shell scripts.
5318 vendorman1dir (vendorman1dir.U):
5319 This variable contains the name of the directory for man1
5320 pages. It may have a ~ on the front.
5321 The standard distribution will put nothing in this directory.
5322 Vendors who distribute perl may wish to place their own
5323 man1 pages in this directory with
5324 MakeMaker Makefile.PL INSTALLDIRS=vendor
5325 or equivalent. See INSTALL for details.
5327 vendorman1direxp (vendorman1dir.U):
5328 This variable is the ~name expanded version of vendorman1dir, so that you
5329 may use it directly in Makefiles or shell scripts.
5331 vendorman3dir (vendorman3dir.U):
5332 This variable contains the name of the directory for man3
5333 pages. It may have a ~ on the front.
5334 The standard distribution will put nothing in this directory.
5335 Vendors who distribute perl may wish to place their own
5336 man3 pages in this directory with
5337 MakeMaker Makefile.PL INSTALLDIRS=vendor
5338 or equivalent. See INSTALL for details.
5340 vendorman3direxp (vendorman3dir.U):
5341 This variable is the ~name expanded version of vendorman3dir, so that you
5342 may use it directly in Makefiles or shell scripts.
5344 vendorprefix (vendorprefix.U):
5345 This variable holds the full absolute path of the directory below
5346 which the vendor will install add-on packages.
5347 See INSTALL for usage and examples.
5349 vendorprefixexp (vendorprefix.U):
5350 This variable holds the full absolute path of the directory below
5351 which the vendor will install add-on packages. Derived from vendorprefix.
5353 vendorscript (vendorscript.U):
5354 This variable contains the eventual value of the VENDORSCRIPT symbol.
5355 It may have a ~ on the front.
5356 The standard distribution will put nothing in this directory.
5357 Vendors who distribute perl may wish to place additional
5358 executable scripts in this directory with
5359 MakeMaker Makefile.PL INSTALLDIRS=vendor
5360 or equivalent. See INSTALL for details.
5362 vendorscriptexp (vendorscript.U):
5363 This variable is the ~name expanded version of vendorscript, so that you
5364 may use it directly in Makefiles or shell scripts.
5366 version (patchlevel.U):
5367 The full version number of this package, such as 5.6.1 (or 5_6_1).
5368 This combines revision, patchlevel, and subversion to get the
5369 full version number, including any possible subversions.
5370 This is suitable for use as a directory name, and hence is
5371 filesystem dependent.
5373 version_patchlevel_string (patchlevel.U):
5374 This is a string combining version, subversion and
5375 perl_patchlevel (if perl_patchlevel is non-zero).
5376 It is typically something like
5377 'version 7 subversion 1' or
5378 'version 7 subversion 1 patchlevel 11224'
5379 It is computed here to avoid duplication of code in myconfig.SH
5382 versiononly (versiononly.U):
5383 If set, this symbol indicates that only the version-specific
5384 components of a perl installation should be installed.
5385 This may be useful for making a test installation of a new
5386 version without disturbing the existing installation.
5387 Setting versiononly is equivalent to setting installperl's -v option.
5388 In particular, the non-versioned scripts and programs such as
5389 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
5390 (see INSTALL for a more complete list). Nor are the man
5392 Usually, this is undef.
5395 This variable is defined but not used by Configure.
5396 The value is the empty string and is not useful.
5399 This variable holds extra path (space-separated) used to find
5400 libraries on this platform, for example CPU-specific libraries
5401 (on multi-CPU platforms) may be listed here.
5404 This variable holds the name of the compiler compiler we
5405 want to use in the Makefile. It can be yacc, byacc, or bison -y.
5408 This variable contains any additional yacc flags desired by the
5409 user. It is up to the Makefile to use this.
5412 This variable is defined but not used by Configure.
5413 The value is the empty string and is not useful.
5416 This variable is used internally by Configure to determine the
5417 full pathname (if any) of the zip program. After Configure runs,
5418 the value is reset to a plain "zip" and is not useful.