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
1339 This variable conditionally defines HAS_LINK if link() is
1340 available to create hard links.
1342 d_localtime64 (d_timefuncs64.U):
1343 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1344 indicates to the C program that the localtime64 () routine is available.
1346 d_localtime_r (d_localtime_r.U):
1347 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1348 which indicates to the C program that the localtime_r()
1349 routine is available.
1351 d_localtime_r_needs_tzset (d_localtime_r.U):
1352 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1353 symbol, which makes us call tzset before localtime_r()
1355 d_locconv (d_locconv.U):
1356 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1357 available for numeric and monetary formatting conventions.
1359 d_lockf (d_lockf.U):
1360 This variable conditionally defines HAS_LOCKF if lockf() is
1361 available to do file locking.
1363 d_longdbl (d_longdbl.U):
1364 This variable conditionally defines HAS_LONG_DOUBLE if
1365 the long double type is supported.
1367 d_longlong (d_longlong.U):
1368 This variable conditionally defines HAS_LONG_LONG if
1369 the long long type is supported.
1371 d_lseekproto (d_lseekproto.U):
1372 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1373 which indicates to the C program that the system provides
1374 a prototype for the lseek() function. Otherwise, it is
1375 up to the program to supply one.
1377 d_lstat (d_lstat.U):
1378 This variable conditionally defines HAS_LSTAT if lstat() is
1379 available to do file stats on symbolic links.
1381 d_madvise (d_madvise.U):
1382 This variable conditionally defines HAS_MADVISE if madvise() is
1383 available to map a file into memory.
1385 d_malloc_good_size (d_malloc_size.U):
1386 This symbol, if defined, indicates that the malloc_good_size
1387 routine is available for use.
1389 d_malloc_size (d_malloc_size.U):
1390 This symbol, if defined, indicates that the malloc_size
1391 routine is available for use.
1393 d_mblen (d_mblen.U):
1394 This variable conditionally defines the HAS_MBLEN symbol, which
1395 indicates to the C program that the mblen() routine is available
1396 to find the number of bytes in a multibye character.
1398 d_mbstowcs (d_mbstowcs.U):
1399 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1400 indicates to the C program that the mbstowcs() routine is available
1401 to convert a multibyte string into a wide character string.
1403 d_mbtowc (d_mbtowc.U):
1404 This variable conditionally defines the HAS_MBTOWC symbol, which
1405 indicates to the C program that the mbtowc() routine is available
1406 to convert multibyte to a wide character.
1408 d_memchr (d_memchr.U):
1409 This variable conditionally defines the HAS_MEMCHR symbol, which
1410 indicates to the C program that the memchr() routine is available
1411 to locate characters within a C string.
1413 d_memcmp (d_memcmp.U):
1414 This variable conditionally defines the HAS_MEMCMP symbol, which
1415 indicates to the C program that the memcmp() routine is available
1416 to compare blocks of memory.
1418 d_memcpy (d_memcpy.U):
1419 This variable conditionally defines the HAS_MEMCPY symbol, which
1420 indicates to the C program that the memcpy() routine is available
1421 to copy blocks of memory.
1423 d_memmove (d_memmove.U):
1424 This variable conditionally defines the HAS_MEMMOVE symbol, which
1425 indicates to the C program that the memmove() routine is available
1426 to copy potentially overlapping blocks of memory.
1428 d_memset (d_memset.U):
1429 This variable conditionally defines the HAS_MEMSET symbol, which
1430 indicates to the C program that the memset() routine is available
1431 to set blocks of memory.
1433 d_mkdir (d_mkdir.U):
1434 This variable conditionally defines the HAS_MKDIR symbol, which
1435 indicates to the C program that the mkdir() routine is available
1436 to create directories..
1438 d_mkdtemp (d_mkdtemp.U):
1439 This variable conditionally defines the HAS_MKDTEMP symbol, which
1440 indicates to the C program that the mkdtemp() routine is available
1441 to exclusively create a uniquely named temporary directory.
1443 d_mkfifo (d_mkfifo.U):
1444 This variable conditionally defines the HAS_MKFIFO symbol, which
1445 indicates to the C program that the mkfifo() routine is available.
1447 d_mkstemp (d_mkstemp.U):
1448 This variable conditionally defines the HAS_MKSTEMP symbol, which
1449 indicates to the C program that the mkstemp() routine is available
1450 to exclusively create and open a uniquely named temporary file.
1452 d_mkstemps (d_mkstemps.U):
1453 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1454 indicates to the C program that the mkstemps() routine is available
1455 to exclusively create and open a uniquely named (with a suffix)
1458 d_mktime (d_mktime.U):
1459 This variable conditionally defines the HAS_MKTIME symbol, which
1460 indicates to the C program that the mktime() routine is available.
1462 d_mktime64 (d_timefuncs64.U):
1463 This variable conditionally defines the HAS_MKTIME64 symbol, which
1464 indicates to the C program that the mktime64 () routine is available.
1467 This variable conditionally defines HAS_MMAP if mmap() is
1468 available to map a file into memory.
1470 d_modfl (d_modfl.U):
1471 This variable conditionally defines the HAS_MODFL symbol, which
1472 indicates to the C program that the modfl() routine is available.
1474 d_modfl_pow32_bug (d_modfl.U):
1475 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1476 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1477 For example from 4294967303.150000 one would get 4294967302.000000
1478 and 1.150000. The bug has been seen in certain versions of glibc,
1479 release 2.2.2 is known to be okay.
1481 d_modflproto (d_modfl.U):
1482 This symbol, if defined, indicates that the system provides
1483 a prototype for the modfl() function. Otherwise, it is up
1484 to the program to supply one. C99 says it should be
1485 long double modfl(long double, long double *);
1487 d_mprotect (d_mprotect.U):
1488 This variable conditionally defines HAS_MPROTECT if mprotect() is
1489 available to modify the access protection of a memory mapped file.
1492 This variable conditionally defines the HAS_MSG symbol, which
1493 indicates that the entire msg*(2) library is present.
1495 d_msg_ctrunc (d_socket.U):
1496 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1497 which indicates that the MSG_CTRUNC is available. #ifdef is
1498 not enough because it may be an enum, glibc has been known to do this.
1500 d_msg_dontroute (d_socket.U):
1501 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1502 which indicates that the MSG_DONTROUTE is available. #ifdef is
1503 not enough because it may be an enum, glibc has been known to do this.
1505 d_msg_oob (d_socket.U):
1506 This variable conditionally defines the HAS_MSG_OOB symbol,
1507 which indicates that the MSG_OOB is available. #ifdef is
1508 not enough because it may be an enum, glibc has been known to do this.
1510 d_msg_peek (d_socket.U):
1511 This variable conditionally defines the HAS_MSG_PEEK symbol,
1512 which indicates that the MSG_PEEK is available. #ifdef is
1513 not enough because it may be an enum, glibc has been known to do this.
1515 d_msg_proxy (d_socket.U):
1516 This variable conditionally defines the HAS_MSG_PROXY symbol,
1517 which indicates that the MSG_PROXY is available. #ifdef is
1518 not enough because it may be an enum, glibc has been known to do this.
1520 d_msgctl (d_msgctl.U):
1521 This variable conditionally defines the HAS_MSGCTL symbol, which
1522 indicates to the C program that the msgctl() routine is available.
1524 d_msgget (d_msgget.U):
1525 This variable conditionally defines the HAS_MSGGET symbol, which
1526 indicates to the C program that the msgget() routine is available.
1528 d_msghdr_s (d_msghdr_s.U):
1529 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1530 which indicates that the struct msghdr is supported.
1532 d_msgrcv (d_msgrcv.U):
1533 This variable conditionally defines the HAS_MSGRCV symbol, which
1534 indicates to the C program that the msgrcv() routine is available.
1536 d_msgsnd (d_msgsnd.U):
1537 This variable conditionally defines the HAS_MSGSND symbol, which
1538 indicates to the C program that the msgsnd() routine is available.
1540 d_msync (d_msync.U):
1541 This variable conditionally defines HAS_MSYNC if msync() is
1542 available to synchronize a mapped file.
1544 d_munmap (d_munmap.U):
1545 This variable conditionally defines HAS_MUNMAP if munmap() is
1546 available to unmap a region mapped by mmap().
1548 d_mymalloc (mallocsrc.U):
1549 This variable conditionally defines MYMALLOC in case other parts
1550 of the source want to take special action if MYMALLOC is used.
1551 This may include different sorts of profiling or error detection.
1554 This variable conditionally defines the HAS_NDBM symbol, which
1555 indicates that both the ndbm.h include file and an appropriate ndbm
1556 library exist. Consult the different i_*ndbm variables
1557 to find out the actual include location. Sometimes, a system has the
1558 header file but not the library. This variable will only be set if
1559 the system has both.
1561 d_ndbm_h_uses_prototypes (i_ndbm.U):
1562 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1563 which indicates that the ndbm.h include file uses real ANSI C
1564 prototypes instead of K&R style function declarations. K&R style
1565 declarations are unsupported in C++, so the include file requires
1566 special handling when using a C++ compiler and this variable is
1567 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1568 to get the same information for alternative ndbm.h include files.
1571 This variable conditionally defines the HAS_NICE symbol, which
1572 indicates to the C program that the nice() routine is available.
1574 d_nl_langinfo (d_nl_langinfo.U):
1575 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1576 indicates to the C program that the nl_langinfo() routine is available.
1578 d_nv_preserves_uv (perlxv.U):
1579 This variable indicates whether a variable of type nvtype
1580 can preserve all the bits a variable of type uvtype.
1582 d_nv_zero_is_allbits_zero (perlxv.U):
1583 This variable indicates whether a variable of type nvtype
1584 stores 0.0 in memory as all bits zero.
1586 d_off64_t (d_off64_t.U):
1587 This symbol will be defined if the C compiler supports off64_t.
1589 d_old_pthread_create_joinable (d_pthrattrj.U):
1590 This variable conditionally defines pthread_create_joinable.
1591 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1593 d_oldpthreads (usethreads.U):
1594 This variable conditionally defines the OLD_PTHREADS_API symbol,
1595 and indicates that Perl should be built to use the old
1596 draft POSIX threads API. This is only potentially meaningful if
1599 d_oldsock (d_socket.U):
1600 This variable conditionally defines the OLDSOCKET symbol, which
1601 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1603 d_open3 (d_open3.U):
1604 This variable conditionally defines the HAS_OPEN3 manifest constant,
1605 which indicates to the C program that the 3 argument version of
1606 the open(2) function is available.
1608 d_pathconf (d_pathconf.U):
1609 This variable conditionally defines the HAS_PATHCONF symbol, which
1610 indicates to the C program that the pathconf() routine is available
1611 to determine file-system related limits and options associated
1612 with a given filename.
1614 d_pause (d_pause.U):
1615 This variable conditionally defines the HAS_PAUSE symbol, which
1616 indicates to the C program that the pause() routine is available
1617 to suspend a process until a signal is received.
1619 d_perl_otherlibdirs (otherlibdirs.U):
1620 This variable conditionally defines PERL_OTHERLIBDIRS, which
1621 contains a colon-separated set of paths for the perl binary to
1622 include in @INC. See also otherlibdirs.
1624 d_phostname (d_gethname.U):
1625 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1626 contains the shell command which, when fed to popen(), may be
1627 used to derive the host name.
1630 This variable conditionally defines the HAS_PIPE symbol, which
1631 indicates to the C program that the pipe() routine is available
1632 to create an inter-process channel.
1635 This variable conditionally defines the HAS_POLL symbol, which
1636 indicates to the C program that the poll() routine is available
1637 to poll active file descriptors.
1639 d_portable (d_portable.U):
1640 This variable conditionally defines the PORTABLE symbol, which
1641 indicates to the C program that it should not assume that it is
1642 running on the machine it was compiled on.
1644 d_prctl (d_prctl.U):
1645 This variable conditionally defines the HAS_PRCTL symbol, which
1646 indicates to the C program that the prctl() routine is available.
1648 d_prctl_set_name (d_prctl.U):
1649 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
1650 which indicates to the C program that the prctl() routine supports
1651 the PR_SET_NAME option.
1653 d_PRId64 (quadfio.U):
1654 This variable conditionally defines the PERL_PRId64 symbol, which
1655 indicates that stdio has a symbol to print 64-bit decimal numbers.
1657 d_PRIeldbl (longdblfio.U):
1658 This variable conditionally defines the PERL_PRIfldbl symbol, which
1659 indicates that stdio has a symbol to print long doubles.
1661 d_PRIEUldbl (longdblfio.U):
1662 This variable conditionally defines the PERL_PRIfldbl symbol, which
1663 indicates that stdio has a symbol to print long doubles.
1664 The 'U' in the name is to separate this from d_PRIeldbl so that even
1665 case-blind systems can see the difference.
1667 d_PRIfldbl (longdblfio.U):
1668 This variable conditionally defines the PERL_PRIfldbl symbol, which
1669 indicates that stdio has a symbol to print long doubles.
1671 d_PRIFUldbl (longdblfio.U):
1672 This variable conditionally defines the PERL_PRIfldbl symbol, which
1673 indicates that stdio has a symbol to print long doubles.
1674 The 'U' in the name is to separate this from d_PRIfldbl so that even
1675 case-blind systems can see the difference.
1677 d_PRIgldbl (longdblfio.U):
1678 This variable conditionally defines the PERL_PRIfldbl symbol, which
1679 indicates that stdio has a symbol to print long doubles.
1681 d_PRIGUldbl (longdblfio.U):
1682 This variable conditionally defines the PERL_PRIfldbl symbol, which
1683 indicates that stdio has a symbol to print long doubles.
1684 The 'U' in the name is to separate this from d_PRIgldbl so that even
1685 case-blind systems can see the difference.
1687 d_PRIi64 (quadfio.U):
1688 This variable conditionally defines the PERL_PRIi64 symbol, which
1689 indicates that stdio has a symbol to print 64-bit decimal numbers.
1691 d_printf_format_null (d_attribut.U):
1692 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1693 indicates the C compiler allows printf-like formats to be null.
1695 d_PRIo64 (quadfio.U):
1696 This variable conditionally defines the PERL_PRIo64 symbol, which
1697 indicates that stdio has a symbol to print 64-bit octal numbers.
1699 d_PRIu64 (quadfio.U):
1700 This variable conditionally defines the PERL_PRIu64 symbol, which
1701 indicates that stdio has a symbol to print 64-bit unsigned decimal
1704 d_PRIx64 (quadfio.U):
1705 This variable conditionally defines the PERL_PRIx64 symbol, which
1706 indicates that stdio has a symbol to print 64-bit hexadecimal numbers.
1708 d_PRIXU64 (quadfio.U):
1709 This variable conditionally defines the PERL_PRIXU64 symbol, which
1710 indicates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1711 The 'U' in the name is to separate this from d_PRIx64 so that even
1712 case-blind systems can see the difference.
1714 d_procselfexe (d_procselfexe.U):
1715 Defined if $procselfexe is symlink to the absolute
1716 pathname of the executing program.
1718 d_pseudofork (d_vfork.U):
1719 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1720 which indicates that an emulation of the fork routine is available.
1722 d_pthread_atfork (d_pthread_atfork.U):
1723 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1724 which indicates to the C program that the pthread_atfork()
1725 routine is available.
1727 d_pthread_attr_setscope (d_pthread_attr_ss.U):
1728 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1729 pthread_attr_setscope() is available to set the contention scope
1730 attribute of a thread attribute object.
1732 d_pthread_yield (d_pthread_y.U):
1733 This variable conditionally defines the HAS_PTHREAD_YIELD
1734 symbol if the pthread_yield routine is available to yield
1735 the execution of the current thread.
1738 This variable conditionally defines PWAGE, which indicates
1739 that struct passwd contains pw_age.
1741 d_pwchange (i_pwd.U):
1742 This variable conditionally defines PWCHANGE, which indicates
1743 that struct passwd contains pw_change.
1745 d_pwclass (i_pwd.U):
1746 This variable conditionally defines PWCLASS, which indicates
1747 that struct passwd contains pw_class.
1749 d_pwcomment (i_pwd.U):
1750 This variable conditionally defines PWCOMMENT, which indicates
1751 that struct passwd contains pw_comment.
1753 d_pwexpire (i_pwd.U):
1754 This variable conditionally defines PWEXPIRE, which indicates
1755 that struct passwd contains pw_expire.
1757 d_pwgecos (i_pwd.U):
1758 This variable conditionally defines PWGECOS, which indicates
1759 that struct passwd contains pw_gecos.
1761 d_pwpasswd (i_pwd.U):
1762 This variable conditionally defines PWPASSWD, which indicates
1763 that struct passwd contains pw_passwd.
1765 d_pwquota (i_pwd.U):
1766 This variable conditionally defines PWQUOTA, which indicates
1767 that struct passwd contains pw_quota.
1769 d_qgcvt (d_qgcvt.U):
1770 This variable conditionally defines the HAS_QGCVT symbol, which
1771 indicates to the C program that the qgcvt() routine is available.
1773 d_quad (quadtype.U):
1774 This variable, if defined, tells that there's a 64-bit integer type,
1777 d_random_r (d_random_r.U):
1778 This variable conditionally defines the HAS_RANDOM_R symbol,
1779 which indicates to the C program that the random_r()
1780 routine is available.
1782 d_readdir (d_readdir.U):
1783 This variable conditionally defines HAS_READDIR if readdir() is
1784 available to read directory entries.
1786 d_readdir64_r (d_readdir64_r.U):
1787 This variable conditionally defines the HAS_READDIR64_R symbol,
1788 which indicates to the C program that the readdir64_r()
1789 routine is available.
1791 d_readdir_r (d_readdir_r.U):
1792 This variable conditionally defines the HAS_READDIR_R symbol,
1793 which indicates to the C program that the readdir_r()
1794 routine is available.
1796 d_readlink (d_readlink.U):
1797 This variable conditionally defines the HAS_READLINK symbol, which
1798 indicates to the C program that the readlink() routine is available
1799 to read the value of a symbolic link.
1801 d_readv (d_readv.U):
1802 This variable conditionally defines the HAS_READV symbol, which
1803 indicates to the C program that the readv() routine is available.
1805 d_recvmsg (d_recvmsg.U):
1806 This variable conditionally defines the HAS_RECVMSG symbol, which
1807 indicates to the C program that the recvmsg() routine is available.
1809 d_rename (d_rename.U):
1810 This variable conditionally defines the HAS_RENAME symbol, which
1811 indicates to the C program that the rename() routine is available
1814 d_rewinddir (d_readdir.U):
1815 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1818 d_rmdir (d_rmdir.U):
1819 This variable conditionally defines HAS_RMDIR if rmdir() is
1820 available to remove directories.
1822 d_safebcpy (d_safebcpy.U):
1823 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1824 the bcopy() routine can do overlapping copies. Normally, you
1825 should probably use memmove().
1827 d_safemcpy (d_safemcpy.U):
1828 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1829 the memcpy() routine can do overlapping copies.
1830 For overlapping copies, memmove() should be used, if available.
1832 d_sanemcmp (d_sanemcmp.U):
1833 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1834 the memcpy() routine is available and can be used to compare relative
1835 magnitudes of chars with their high bits set.
1837 d_sbrkproto (d_sbrkproto.U):
1838 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1839 which indicates to the C program that the system provides
1840 a prototype for the sbrk() function. Otherwise, it is
1841 up to the program to supply one.
1843 d_scalbnl (d_scalbnl.U):
1844 This variable conditionally defines the HAS_SCALBNL symbol, which
1845 indicates to the C program that the scalbnl() routine is available.
1846 If ilogbl is also present we can emulate frexpl.
1848 d_sched_yield (d_pthread_y.U):
1849 This variable conditionally defines the HAS_SCHED_YIELD
1850 symbol if the sched_yield routine is available to yield
1851 the execution of the current thread.
1853 d_scm_rights (d_socket.U):
1854 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1855 which indicates that the SCM_RIGHTS is available. #ifdef is
1856 not enough because it may be an enum, glibc has been known to do this.
1858 d_SCNfldbl (longdblfio.U):
1859 This variable conditionally defines the PERL_PRIfldbl symbol, which
1860 indicates that stdio has a symbol to scan long doubles.
1862 d_seekdir (d_readdir.U):
1863 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1866 d_select (d_select.U):
1867 This variable conditionally defines HAS_SELECT if select() is
1868 available to select active file descriptors. A <sys/time.h>
1869 inclusion may be necessary for the timeout field.
1872 This variable conditionally defines the HAS_SEM symbol, which
1873 indicates that the entire sem*(2) library is present.
1875 d_semctl (d_semctl.U):
1876 This variable conditionally defines the HAS_SEMCTL symbol, which
1877 indicates to the C program that the semctl() routine is available.
1879 d_semctl_semid_ds (d_union_semun.U):
1880 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1881 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1883 d_semctl_semun (d_union_semun.U):
1884 This variable conditionally defines USE_SEMCTL_SEMUN, which
1885 indicates that union semun is to be used for semctl IPC_STAT.
1887 d_semget (d_semget.U):
1888 This variable conditionally defines the HAS_SEMGET symbol, which
1889 indicates to the C program that the semget() routine is available.
1891 d_semop (d_semop.U):
1892 This variable conditionally defines the HAS_SEMOP symbol, which
1893 indicates to the C program that the semop() routine is available.
1895 d_sendmsg (d_sendmsg.U):
1896 This variable conditionally defines the HAS_SENDMSG symbol, which
1897 indicates to the C program that the sendmsg() routine is available.
1899 d_setegid (d_setegid.U):
1900 This variable conditionally defines the HAS_SETEGID symbol, which
1901 indicates to the C program that the setegid() routine is available
1902 to change the effective gid of the current program.
1904 d_seteuid (d_seteuid.U):
1905 This variable conditionally defines the HAS_SETEUID symbol, which
1906 indicates to the C program that the seteuid() routine is available
1907 to change the effective uid of the current program.
1909 d_setgrent (d_setgrent.U):
1910 This variable conditionally defines the HAS_SETGRENT symbol, which
1911 indicates to the C program that the setgrent() routine is available
1912 for initializing sequential access to the group database.
1914 d_setgrent_r (d_setgrent_r.U):
1915 This variable conditionally defines the HAS_SETGRENT_R symbol,
1916 which indicates to the C program that the setgrent_r()
1917 routine is available.
1919 d_setgrps (d_setgrps.U):
1920 This variable conditionally defines the HAS_SETGROUPS symbol, which
1921 indicates to the C program that the setgroups() routine is available
1922 to set the list of process groups.
1924 d_sethent (d_sethent.U):
1925 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1928 d_sethostent_r (d_sethostent_r.U):
1929 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1930 which indicates to the C program that the sethostent_r()
1931 routine is available.
1933 d_setitimer (d_setitimer.U):
1934 This variable conditionally defines the HAS_SETITIMER symbol, which
1935 indicates to the C program that the setitimer() routine is available.
1937 d_setlinebuf (d_setlnbuf.U):
1938 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1939 indicates to the C program that the setlinebuf() routine is available
1940 to change stderr or stdout from block-buffered or unbuffered to a
1943 d_setlocale (d_setlocale.U):
1944 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1945 available to handle locale-specific ctype implementations.
1947 d_setlocale_r (d_setlocale_r.U):
1948 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1949 which indicates to the C program that the setlocale_r()
1950 routine is available.
1952 d_setnent (d_setnent.U):
1953 This variable conditionally defines HAS_SETNETENT if setnetent() is
1956 d_setnetent_r (d_setnetent_r.U):
1957 This variable conditionally defines the HAS_SETNETENT_R symbol,
1958 which indicates to the C program that the setnetent_r()
1959 routine is available.
1961 d_setpent (d_setpent.U):
1962 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1965 d_setpgid (d_setpgid.U):
1966 This variable conditionally defines the HAS_SETPGID symbol if the
1967 setpgid(pid, gpid) function is available to set process group ID.
1969 d_setpgrp (d_setpgrp.U):
1970 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1971 available to set the current process group.
1973 d_setpgrp2 (d_setpgrp2.U):
1974 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1975 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1976 is available to set the current process group.
1978 d_setprior (d_setprior.U):
1979 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1980 is available to set a process's priority.
1982 d_setproctitle (d_setproctitle.U):
1983 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1984 which indicates to the C program that the setproctitle() routine
1987 d_setprotoent_r (d_setprotoent_r.U):
1988 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1989 which indicates to the C program that the setprotoent_r()
1990 routine is available.
1992 d_setpwent (d_setpwent.U):
1993 This variable conditionally defines the HAS_SETPWENT symbol, which
1994 indicates to the C program that the setpwent() routine is available
1995 for initializing sequential access to the passwd database.
1997 d_setpwent_r (d_setpwent_r.U):
1998 This variable conditionally defines the HAS_SETPWENT_R symbol,
1999 which indicates to the C program that the setpwent_r()
2000 routine is available.
2002 d_setregid (d_setregid.U):
2003 This variable conditionally defines HAS_SETREGID if setregid() is
2004 available to change the real and effective gid of the current
2007 d_setresgid (d_setregid.U):
2008 This variable conditionally defines HAS_SETRESGID if setresgid() is
2009 available to change the real, effective and saved gid of the current
2012 d_setresuid (d_setreuid.U):
2013 This variable conditionally defines HAS_SETREUID if setresuid() is
2014 available to change the real, effective and saved uid of the current
2017 d_setreuid (d_setreuid.U):
2018 This variable conditionally defines HAS_SETREUID if setreuid() is
2019 available to change the real and effective uid of the current
2022 d_setrgid (d_setrgid.U):
2023 This variable conditionally defines the HAS_SETRGID symbol, which
2024 indicates to the C program that the setrgid() routine is available
2025 to change the real gid of the current program.
2027 d_setruid (d_setruid.U):
2028 This variable conditionally defines the HAS_SETRUID symbol, which
2029 indicates to the C program that the setruid() routine is available
2030 to change the real uid of the current program.
2032 d_setsent (d_setsent.U):
2033 This variable conditionally defines HAS_SETSERVENT if setservent() is
2036 d_setservent_r (d_setservent_r.U):
2037 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2038 which indicates to the C program that the setservent_r()
2039 routine is available.
2041 d_setsid (d_setsid.U):
2042 This variable conditionally defines HAS_SETSID if setsid() is
2043 available to set the process group ID.
2045 d_setvbuf (d_setvbuf.U):
2046 This variable conditionally defines the HAS_SETVBUF symbol, which
2047 indicates to the C program that the setvbuf() routine is available
2048 to change buffering on an open stdio stream.
2051 This variable conditionally defines the USE_SFIO symbol,
2052 and indicates whether sfio is available (and should be used).
2055 This variable conditionally defines the HAS_SHM symbol, which
2056 indicates that the entire shm*(2) library is present.
2058 d_shmat (d_shmat.U):
2059 This variable conditionally defines the HAS_SHMAT symbol, which
2060 indicates to the C program that the shmat() routine is available.
2062 d_shmatprototype (d_shmat.U):
2063 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
2064 symbol, which indicates that sys/shm.h has a prototype for
2067 d_shmctl (d_shmctl.U):
2068 This variable conditionally defines the HAS_SHMCTL symbol, which
2069 indicates to the C program that the shmctl() routine is available.
2071 d_shmdt (d_shmdt.U):
2072 This variable conditionally defines the HAS_SHMDT symbol, which
2073 indicates to the C program that the shmdt() routine is available.
2075 d_shmget (d_shmget.U):
2076 This variable conditionally defines the HAS_SHMGET symbol, which
2077 indicates to the C program that the shmget() routine is available.
2079 d_sigaction (d_sigaction.U):
2080 This variable conditionally defines the HAS_SIGACTION symbol, which
2081 indicates that the Vr4 sigaction() routine is available.
2083 d_signbit (d_signbit.U):
2084 This variable conditionally defines the HAS_SIGNBIT symbol, which
2085 indicates to the C program that the signbit() routine is available
2086 and safe to use with perl's intern NV type.
2088 d_sigprocmask (d_sigprocmask.U):
2089 This variable conditionally defines HAS_SIGPROCMASK
2090 if sigprocmask() is available to examine or change the signal mask
2091 of the calling process.
2093 d_sigsetjmp (d_sigsetjmp.U):
2094 This variable conditionally defines the HAS_SIGSETJMP symbol,
2095 which indicates that the sigsetjmp() routine is available to
2096 call setjmp() and optionally save the process's signal mask.
2098 d_sin6_scope_id (d_socket.U):
2099 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2100 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2103 d_sitearch (sitearch.U):
2104 This variable conditionally defines SITEARCH to hold the pathname
2105 of architecture-dependent library files for $package. If
2106 $sitearch is the same as $archlib, then this is set to undef.
2108 d_snprintf (d_snprintf.U):
2109 This variable conditionally defines the HAS_SNPRINTF symbol, which
2110 indicates to the C program that the snprintf () library function
2113 d_sockaddr_in6 (d_socket.U):
2114 This variable conditionally defines the HAS_SOCKADDR_IN6 symbol, which
2115 indicates the availability of a struct sockaddr_in6.
2117 d_sockaddr_sa_len (d_socket.U):
2118 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2119 which indicates that a struct sockaddr structure has the sa_len
2122 d_sockatmark (d_sockatmark.U):
2123 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2124 indicates to the C program that the sockatmark() routine is available.
2126 d_sockatmarkproto (d_sockatmarkproto.U):
2127 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2128 which indicates to the C program that the system provides
2129 a prototype for the sockatmark() function. Otherwise, it is
2130 up to the program to supply one.
2132 d_socket (d_socket.U):
2133 This variable conditionally defines HAS_SOCKET, which indicates
2134 that the BSD socket interface is supported.
2136 d_socklen_t (d_socklen_t.U):
2137 This symbol will be defined if the C compiler supports socklen_t.
2139 d_sockpair (d_socket.U):
2140 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2141 indicates that the BSD socketpair() is supported.
2143 d_socks5_init (d_socks5_init.U):
2144 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2145 indicates to the C program that the socks5_init() routine is available.
2147 d_sprintf_returns_strlen (d_sprintf_len.U):
2148 This variable defines whether sprintf returns the length of the string
2149 (as per the ANSI spec). Some C libraries retain compatibility with
2150 pre-ANSI C and return a pointer to the passed in buffer; for these
2151 this variable will be undef.
2153 d_sqrtl (d_sqrtl.U):
2154 This variable conditionally defines the HAS_SQRTL symbol, which
2155 indicates to the C program that the sqrtl() routine is available.
2157 d_srand48_r (d_srand48_r.U):
2158 This variable conditionally defines the HAS_SRAND48_R symbol,
2159 which indicates to the C program that the srand48_r()
2160 routine is available.
2162 d_srandom_r (d_srandom_r.U):
2163 This variable conditionally defines the HAS_SRANDOM_R symbol,
2164 which indicates to the C program that the srandom_r()
2165 routine is available.
2167 d_sresgproto (d_sresgproto.U):
2168 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2169 which indicates to the C program that the system provides
2170 a prototype for the setresgid() function. Otherwise, it is
2171 up to the program to supply one.
2173 d_sresuproto (d_sresuproto.U):
2174 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2175 which indicates to the C program that the system provides
2176 a prototype for the setresuid() function. Otherwise, it is
2177 up to the program to supply one.
2179 d_statblks (d_statblks.U):
2180 This variable conditionally defines USE_STAT_BLOCKS
2181 if this system has a stat structure declaring
2182 st_blksize and st_blocks.
2184 d_statfs_f_flags (d_statfs_f_flags.U):
2185 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
2186 symbol, which indicates to struct statfs from has f_flags member.
2187 This kind of struct statfs is coming from sys/mount.h (BSD),
2188 not from sys/statfs.h (SYSV).
2190 d_statfs_s (d_statfs_s.U):
2191 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2192 which indicates that the struct statfs is supported.
2194 d_static_inline (d_static_inline.U):
2195 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2196 which indicates that the C compiler supports C99-style static
2197 inline. That is, the function can't be called from another
2200 d_statvfs (d_statvfs.U):
2201 This variable conditionally defines the HAS_STATVFS symbol, which
2202 indicates to the C program that the statvfs() routine is available.
2204 d_stdio_cnt_lval (d_stdstdio.U):
2205 This variable conditionally defines STDIO_CNT_LVALUE if the
2206 FILE_cnt macro can be used as an lvalue.
2208 d_stdio_ptr_lval (d_stdstdio.U):
2209 This variable conditionally defines STDIO_PTR_LVALUE if the
2210 FILE_ptr macro can be used as an lvalue.
2212 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2213 This symbol is defined if using the FILE_ptr macro as an lvalue
2214 to increase the pointer by n leaves File_cnt(fp) unchanged.
2216 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2217 This symbol is defined if using the FILE_ptr macro as an lvalue
2218 to increase the pointer by n has the side effect of decreasing the
2219 value of File_cnt(fp) by n.
2221 d_stdio_stream_array (stdio_streams.U):
2222 This variable tells whether there is an array holding
2225 d_stdiobase (d_stdstdio.U):
2226 This variable conditionally defines USE_STDIO_BASE if this system
2227 has a FILE structure declaring a usable _base field (or equivalent)
2230 d_stdstdio (d_stdstdio.U):
2231 This variable conditionally defines USE_STDIO_PTR if this system
2232 has a FILE structure declaring usable _ptr and _cnt fields (or
2233 equivalent) in stdio.h.
2235 d_strchr (d_strchr.U):
2236 This variable conditionally defines HAS_STRCHR if strchr() and
2237 strrchr() are available for string searching.
2239 d_strcoll (d_strcoll.U):
2240 This variable conditionally defines HAS_STRCOLL if strcoll() is
2241 available to compare strings using collating information.
2243 d_strctcpy (d_strctcpy.U):
2244 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2245 indicates to the C program that this C compiler knows how to copy
2248 d_strerrm (d_strerror.U):
2249 This variable holds what Strerror is defined as to translate an error
2250 code condition into an error message string. It could be 'strerror'
2251 or a more complex macro emulating strerror with sys_errlist[], or the
2252 "unknown" string when both strerror and sys_errlist are missing.
2254 d_strerror (d_strerror.U):
2255 This variable conditionally defines HAS_STRERROR if strerror() is
2256 available to translate error numbers to strings.
2258 d_strerror_r (d_strerror_r.U):
2259 This variable conditionally defines the HAS_STRERROR_R symbol,
2260 which indicates to the C program that the strerror_r()
2261 routine is available.
2263 d_strftime (d_strftime.U):
2264 This variable conditionally defines the HAS_STRFTIME symbol, which
2265 indicates to the C program that the strftime() routine is available.
2267 d_strlcat (d_strlcat.U):
2268 This variable conditionally defines the HAS_STRLCAT symbol, which
2269 indicates to the C program that the strlcat () routine is available.
2271 d_strlcpy (d_strlcpy.U):
2272 This variable conditionally defines the HAS_STRLCPY symbol, which
2273 indicates to the C program that the strlcpy () routine is available.
2275 d_strtod (d_strtod.U):
2276 This variable conditionally defines the HAS_STRTOD symbol, which
2277 indicates to the C program that the strtod() routine is available
2278 to provide better numeric string conversion than atof().
2280 d_strtol (d_strtol.U):
2281 This variable conditionally defines the HAS_STRTOL symbol, which
2282 indicates to the C program that the strtol() routine is available
2283 to provide better numeric string conversion than atoi() and friends.
2285 d_strtold (d_strtold.U):
2286 This variable conditionally defines the HAS_STRTOLD symbol, which
2287 indicates to the C program that the strtold() routine is available.
2289 d_strtoll (d_strtoll.U):
2290 This variable conditionally defines the HAS_STRTOLL symbol, which
2291 indicates to the C program that the strtoll() routine is available.
2293 d_strtoq (d_strtoq.U):
2294 This variable conditionally defines the HAS_STRTOQ symbol, which
2295 indicates to the C program that the strtoq() routine is available.
2297 d_strtoul (d_strtoul.U):
2298 This variable conditionally defines the HAS_STRTOUL symbol, which
2299 indicates to the C program that the strtoul() routine is available
2300 to provide conversion of strings to unsigned long.
2302 d_strtoull (d_strtoull.U):
2303 This variable conditionally defines the HAS_STRTOULL symbol, which
2304 indicates to the C program that the strtoull() routine is available.
2306 d_strtouq (d_strtouq.U):
2307 This variable conditionally defines the HAS_STRTOUQ symbol, which
2308 indicates to the C program that the strtouq() routine is available.
2310 d_strxfrm (d_strxfrm.U):
2311 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2312 available to transform strings.
2314 d_suidsafe (d_dosuid.U):
2315 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2316 if setuid scripts can be secure. This test looks in /dev/fd/.
2318 d_symlink (d_symlink.U):
2319 This variable conditionally defines the HAS_SYMLINK symbol, which
2320 indicates to the C program that the symlink() routine is available
2321 to create symbolic links.
2323 d_syscall (d_syscall.U):
2324 This variable conditionally defines HAS_SYSCALL if syscall() is
2325 available call arbitrary system calls.
2327 d_syscallproto (d_syscallproto.U):
2328 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2329 which indicates to the C program that the system provides
2330 a prototype for the syscall() function. Otherwise, it is
2331 up to the program to supply one.
2333 d_sysconf (d_sysconf.U):
2334 This variable conditionally defines the HAS_SYSCONF symbol, which
2335 indicates to the C program that the sysconf() routine is available
2336 to determine system related limits and options.
2338 d_sysernlst (d_strerror.U):
2339 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2340 is available to translate error numbers to the symbolic name.
2342 d_syserrlst (d_strerror.U):
2343 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2344 available to translate error numbers to strings.
2346 d_system (d_system.U):
2347 This variable conditionally defines HAS_SYSTEM if system() is
2348 available to issue a shell command.
2350 d_tcgetpgrp (d_tcgtpgrp.U):
2351 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2352 indicates to the C program that the tcgetpgrp() routine is available.
2353 to get foreground process group ID.
2355 d_tcsetpgrp (d_tcstpgrp.U):
2356 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2357 indicates to the C program that the tcsetpgrp() routine is available
2358 to set foreground process group ID.
2360 d_telldir (d_readdir.U):
2361 This variable conditionally defines HAS_TELLDIR if telldir() is
2364 d_telldirproto (d_telldirproto.U):
2365 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2366 which indicates to the C program that the system provides
2367 a prototype for the telldir() function. Otherwise, it is
2368 up to the program to supply one.
2371 This variable conditionally defines the HAS_TIME symbol, which indicates
2372 that the time() routine exists. The time() routine is normally
2373 provided on UNIX systems.
2375 d_timegm (d_timegm.U):
2376 This variable conditionally defines the HAS_TIMEGM symbol, which
2377 indicates to the C program that the timegm () routine is available.
2379 d_times (d_times.U):
2380 This variable conditionally defines the HAS_TIMES symbol, which indicates
2381 that the times() routine exists. The times() routine is normally
2382 provided on UNIX systems. You may have to include <sys/times.h>.
2384 d_tm_tm_gmtoff (i_time.U):
2385 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2386 indicates to the C program that the struct tm has the tm_gmtoff field.
2388 d_tm_tm_zone (i_time.U):
2389 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2390 indicates to the C program that the struct tm has the tm_zone field.
2392 d_tmpnam_r (d_tmpnam_r.U):
2393 This variable conditionally defines the HAS_TMPNAM_R symbol,
2394 which indicates to the C program that the tmpnam_r()
2395 routine is available.
2397 d_truncate (d_truncate.U):
2398 This variable conditionally defines HAS_TRUNCATE if truncate() is
2399 available to truncate files.
2401 d_ttyname_r (d_ttyname_r.U):
2402 This variable conditionally defines the HAS_TTYNAME_R symbol,
2403 which indicates to the C program that the ttyname_r()
2404 routine is available.
2406 d_tzname (d_tzname.U):
2407 This variable conditionally defines HAS_TZNAME if tzname[] is
2408 available to access timezone names.
2410 d_u32align (d_u32align.U):
2411 This variable tells whether you must access character data
2412 through U32-aligned pointers.
2414 d_ualarm (d_ualarm.U):
2415 This variable conditionally defines the HAS_UALARM symbol, which
2416 indicates to the C program that the ualarm() routine is available.
2418 d_umask (d_umask.U):
2419 This variable conditionally defines the HAS_UMASK symbol, which
2420 indicates to the C program that the umask() routine is available.
2421 to set and get the value of the file creation mask.
2423 d_uname (d_gethname.U):
2424 This variable conditionally defines the HAS_UNAME symbol, which
2425 indicates to the C program that the uname() routine may be
2426 used to derive the host name.
2428 d_union_semun (d_union_semun.U):
2429 This variable conditionally defines HAS_UNION_SEMUN if the
2430 union semun is defined by including <sys/sem.h>.
2432 d_unordered (d_unordered.U):
2433 This variable conditionally defines the HAS_UNORDERED symbol, which
2434 indicates to the C program that the unordered() routine is available.
2436 d_unsetenv (d_unsetenv.U):
2437 This variable conditionally defines the HAS_UNSETENV symbol, which
2438 indicates to the C program that the unsetenv () routine is available.
2440 d_usleep (d_usleep.U):
2441 This variable conditionally defines HAS_USLEEP if usleep() is
2442 available to do high granularity sleeps.
2444 d_usleepproto (d_usleepproto.U):
2445 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2446 which indicates to the C program that the system provides
2447 a prototype for the usleep() function. Otherwise, it is
2448 up to the program to supply one.
2450 d_ustat (d_ustat.U):
2451 This variable conditionally defines HAS_USTAT if ustat() is
2452 available to query file system statistics by dev_t.
2454 d_vendorarch (vendorarch.U):
2455 This variable conditionally defined PERL_VENDORARCH.
2457 d_vendorbin (vendorbin.U):
2458 This variable conditionally defines PERL_VENDORBIN.
2460 d_vendorlib (vendorlib.U):
2461 This variable conditionally defines PERL_VENDORLIB.
2463 d_vendorscript (vendorscript.U):
2464 This variable conditionally defines PERL_VENDORSCRIPT.
2466 d_vfork (d_vfork.U):
2467 This variable conditionally defines the HAS_VFORK symbol, which
2468 indicates the vfork() routine is available.
2470 d_void_closedir (d_closedir.U):
2471 This variable conditionally defines VOID_CLOSEDIR if closedir()
2472 does not return a value.
2474 d_voidsig (d_voidsig.U):
2475 This variable conditionally defines VOIDSIG if this system
2476 declares "void (*signal(...))()" in signal.h. The old way was to
2477 declare it as "int (*signal(...))()".
2479 d_voidtty (i_sysioctl.U):
2480 This variable conditionally defines USE_IOCNOTTY to indicate that the
2481 ioctl() call with TIOCNOTTY should be used to void tty association.
2482 Otherwise (on USG probably), it is enough to close the standard file
2483 descriptors and do a setpgrp().
2485 d_volatile (d_volatile.U):
2486 This variable conditionally defines the HASVOLATILE symbol, which
2487 indicates to the C program that this C compiler knows about the
2488 volatile declaration.
2490 d_vprintf (d_vprintf.U):
2491 This variable conditionally defines the HAS_VPRINTF symbol, which
2492 indicates to the C program that the vprintf() routine is available
2493 to printf with a pointer to an argument list.
2495 d_vsnprintf (d_snprintf.U):
2496 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2497 indicates to the C program that the vsnprintf () library function
2500 d_wait4 (d_wait4.U):
2501 This variable conditionally defines the HAS_WAIT4 symbol, which
2502 indicates the wait4() routine is available.
2504 d_waitpid (d_waitpid.U):
2505 This variable conditionally defines HAS_WAITPID if waitpid() is
2506 available to wait for child process.
2508 d_wcstombs (d_wcstombs.U):
2509 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2510 indicates to the C program that the wcstombs() routine is available
2511 to convert wide character strings to multibyte strings.
2513 d_wctomb (d_wctomb.U):
2514 This variable conditionally defines the HAS_WCTOMB symbol, which
2515 indicates to the C program that the wctomb() routine is available
2516 to convert a wide character to a multibyte.
2518 d_writev (d_writev.U):
2519 This variable conditionally defines the HAS_WRITEV symbol, which
2520 indicates to the C program that the writev() routine is available.
2523 This variable conditionally defines the symbol XENIX, which alerts
2524 the C program that it runs under Xenix.
2527 This variable is used internally by Configure to determine the
2528 full pathname (if any) of the date program. After Configure runs,
2529 the value is reset to a plain "date" and is not useful.
2531 db_hashtype (i_db.U):
2532 This variable contains the type of the hash structure element
2533 in the <db.h> header file. In older versions of DB, it was
2534 int, while in newer ones it is u_int32_t.
2536 db_prefixtype (i_db.U):
2537 This variable contains the type of the prefix structure element
2538 in the <db.h> header file. In older versions of DB, it was
2539 int, while in newer ones it is size_t.
2541 db_version_major (i_db.U):
2542 This variable contains the major version number of
2543 Berkeley DB found in the <db.h> header file.
2545 db_version_minor (i_db.U):
2546 This variable contains the minor version number of
2547 Berkeley DB found in the <db.h> header file.
2548 For DB version 1 this is always 0.
2550 db_version_patch (i_db.U):
2551 This variable contains the patch version number of
2552 Berkeley DB found in the <db.h> header file.
2553 For DB version 1 this is always 0.
2555 defvoidused (voidflags.U):
2556 This variable contains the default value of the VOIDUSED symbol (15).
2558 direntrytype (i_dirent.U):
2559 This symbol is set to 'struct direct' or 'struct dirent' depending on
2560 whether dirent is available or not. You should use this pseudo type to
2561 portably declare your directory entries.
2564 This variable contains the extension that is to be used for the
2565 dynamically loaded modules that perl generates.
2568 This variable contains the name of the dynamic loading file that
2569 will be used with the package.
2571 doublesize (doublesize.U):
2572 This variable contains the value of the DOUBLESIZE symbol, which
2573 indicates to the C program how many bytes there are in a double.
2575 drand01 (randfunc.U):
2576 Indicates the macro to be used to generate normalized
2577 random numbers. Uses randfunc, often divided by
2578 (double) (((unsigned long) 1 << randbits)) in order to
2579 normalize the result.
2580 In C programs, the macro 'Drand01' is mapped to drand01.
2582 drand48_r_proto (d_drand48_r.U):
2583 This variable encodes the prototype of drand48_r.
2584 It is zero if d_drand48_r is undef, and one of the
2585 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2588 dtrace (usedtrace.U):
2589 This variable holds the location of the dtrace executable.
2591 dynamic_ext (Extensions.U):
2592 This variable holds a list of XS extension files we want to
2593 link dynamically into the package. It is used by Makefile.
2595 eagain (nblock_io.U):
2596 This variable bears the symbolic errno code set by read() when no
2597 data is present on the file and non-blocking I/O was enabled (otherwise,
2598 read() blocks naturally).
2601 This variable conditionally defines EBCDIC if this
2602 system uses EBCDIC encoding.
2605 This variable is used internally by Configure to determine the
2606 full pathname (if any) of the echo program. After Configure runs,
2607 the value is reset to a plain "echo" and is not useful.
2610 This variable is used internally by Configure to determine the
2611 full pathname (if any) of the egrep program. After Configure runs,
2612 the value is reset to a plain "egrep" and is not useful.
2615 This variable is defined but not used by Configure.
2616 The value is the empty string and is not useful.
2618 endgrent_r_proto (d_endgrent_r.U):
2619 This variable encodes the prototype of endgrent_r.
2620 It is zero if d_endgrent_r is undef, and one of the
2621 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2624 endhostent_r_proto (d_endhostent_r.U):
2625 This variable encodes the prototype of endhostent_r.
2626 It is zero if d_endhostent_r is undef, and one of the
2627 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2630 endnetent_r_proto (d_endnetent_r.U):
2631 This variable encodes the prototype of endnetent_r.
2632 It is zero if d_endnetent_r is undef, and one of the
2633 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2636 endprotoent_r_proto (d_endprotoent_r.U):
2637 This variable encodes the prototype of endprotoent_r.
2638 It is zero if d_endprotoent_r is undef, and one of the
2639 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2642 endpwent_r_proto (d_endpwent_r.U):
2643 This variable encodes the prototype of endpwent_r.
2644 It is zero if d_endpwent_r is undef, and one of the
2645 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2648 endservent_r_proto (d_endservent_r.U):
2649 This variable encodes the prototype of endservent_r.
2650 It is zero if d_endservent_r is undef, and one of the
2651 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2655 When running under Eunice this variable contains a command which will
2656 convert a shell script to the proper form of text file for it to be
2657 executable by the shell. On other systems it is a no-op.
2660 This is an old synonym for _exe.
2663 This variable is used internally by Configure to determine the
2664 full pathname (if any) of the expr program. After Configure runs,
2665 the value is reset to a plain "expr" and is not useful.
2667 extensions (Extensions.U):
2668 This variable holds a list of all extension files (both XS and
2669 non-xs linked into the package. It is propagated to Config.pm
2670 and is typically used to test whether a particular extension
2674 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
2675 variable can be used in Configure to do the right thing.
2678 This variable holds a list of extra modules to install.
2680 fflushall (fflushall.U):
2681 This symbol, if defined, tells that to flush
2682 all pending stdio output one must loop through all
2683 the stdio file handles stored in an array and fflush them.
2684 Note that if fflushNULL is defined, fflushall will not
2685 even be probed for and will be left undefined.
2687 fflushNULL (fflushall.U):
2688 This symbol, if defined, tells that fflush(NULL) does flush
2689 all pending stdio output.
2692 This variable is defined but not used by Configure.
2693 The value is the empty string and is not useful.
2695 firstmakefile (Unix.U):
2696 This variable defines the first file searched by make. On unix,
2697 it is makefile (then Makefile). On case-insensitive systems,
2698 it might be something else. This is only used to deal with
2699 convoluted make depend tricks.
2702 This variable is defined but not used by Configure.
2703 The value is the empty string and is not useful.
2705 fpossize (fpossize.U):
2706 This variable contains the size of a fpostype in bytes.
2708 fpostype (fpostype.U):
2709 This variable defines Fpos_t to be something like fpos_t, long,
2710 uint, or whatever type is used to declare file positions in libc.
2712 freetype (mallocsrc.U):
2713 This variable contains the return type of free(). It is usually
2714 void, but occasionally int.
2717 This variable contains the command used by Configure
2718 to copy files from the target host. Useful and available
2719 only during Perl build.
2720 The string ':' if not cross-compiling.
2723 This variable contains the full pathname to 'ar', whether or
2724 not the user has specified 'portability'. This is only used
2728 This variable contains the full pathname to 'csh', whether or
2729 not the user has specified 'portability'. This is only used
2730 in the compiled C program, and we assume that all systems which
2731 can share this executable will have the same full pathname to
2734 full_sed (Loc_sed.U):
2735 This variable contains the full pathname to 'sed', whether or
2736 not the user has specified 'portability'. This is only used
2737 in the compiled C program, and we assume that all systems which
2738 can share this executable will have the same full pathname to
2741 gccansipedantic (gccvers.U):
2742 If GNU cc (gcc) is used, this variable will enable (if set) the
2743 -ansi and -pedantic ccflags for building core files (through
2744 cflags script). (See Porting/pumpkin.pod for full description).
2746 gccosandvers (gccvers.U):
2747 If GNU cc (gcc) is used, this variable holds the operating system
2748 and version used to compile gcc. It is set to '' if not gcc,
2749 or if nothing useful can be parsed as the os version.
2751 gccversion (gccvers.U):
2752 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2753 indicate whether the compiler is version 1 or 2. This is used in
2754 setting some of the default cflags. It is set to '' if not gcc.
2756 getgrent_r_proto (d_getgrent_r.U):
2757 This variable encodes the prototype of getgrent_r.
2758 It is zero if d_getgrent_r is undef, and one of the
2759 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2762 getgrgid_r_proto (d_getgrgid_r.U):
2763 This variable encodes the prototype of getgrgid_r.
2764 It is zero if d_getgrgid_r is undef, and one of the
2765 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2768 getgrnam_r_proto (d_getgrnam_r.U):
2769 This variable encodes the prototype of getgrnam_r.
2770 It is zero if d_getgrnam_r is undef, and one of the
2771 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2774 gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2775 This variable encodes the prototype of gethostbyaddr_r.
2776 It is zero if d_gethostbyaddr_r is undef, and one of the
2777 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2780 gethostbyname_r_proto (d_gethostbyname_r.U):
2781 This variable encodes the prototype of gethostbyname_r.
2782 It is zero if d_gethostbyname_r is undef, and one of the
2783 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2786 gethostent_r_proto (d_gethostent_r.U):
2787 This variable encodes the prototype of gethostent_r.
2788 It is zero if d_gethostent_r is undef, and one of the
2789 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2792 getlogin_r_proto (d_getlogin_r.U):
2793 This variable encodes the prototype of getlogin_r.
2794 It is zero if d_getlogin_r is undef, and one of the
2795 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2798 getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2799 This variable encodes the prototype of getnetbyaddr_r.
2800 It is zero if d_getnetbyaddr_r is undef, and one of the
2801 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2804 getnetbyname_r_proto (d_getnetbyname_r.U):
2805 This variable encodes the prototype of getnetbyname_r.
2806 It is zero if d_getnetbyname_r is undef, and one of the
2807 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2810 getnetent_r_proto (d_getnetent_r.U):
2811 This variable encodes the prototype of getnetent_r.
2812 It is zero if d_getnetent_r is undef, and one of the
2813 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2816 getprotobyname_r_proto (d_getprotobyname_r.U):
2817 This variable encodes the prototype of getprotobyname_r.
2818 It is zero if d_getprotobyname_r is undef, and one of the
2819 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2822 getprotobynumber_r_proto (d_getprotobynumber_r.U):
2823 This variable encodes the prototype of getprotobynumber_r.
2824 It is zero if d_getprotobynumber_r is undef, and one of the
2825 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2828 getprotoent_r_proto (d_getprotoent_r.U):
2829 This variable encodes the prototype of getprotoent_r.
2830 It is zero if d_getprotoent_r is undef, and one of the
2831 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2834 getpwent_r_proto (d_getpwent_r.U):
2835 This variable encodes the prototype of getpwent_r.
2836 It is zero if d_getpwent_r is undef, and one of the
2837 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2840 getpwnam_r_proto (d_getpwnam_r.U):
2841 This variable encodes the prototype of getpwnam_r.
2842 It is zero if d_getpwnam_r is undef, and one of the
2843 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2846 getpwuid_r_proto (d_getpwuid_r.U):
2847 This variable encodes the prototype of getpwuid_r.
2848 It is zero if d_getpwuid_r is undef, and one of the
2849 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2852 getservbyname_r_proto (d_getservbyname_r.U):
2853 This variable encodes the prototype of getservbyname_r.
2854 It is zero if d_getservbyname_r is undef, and one of the
2855 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2858 getservbyport_r_proto (d_getservbyport_r.U):
2859 This variable encodes the prototype of getservbyport_r.
2860 It is zero if d_getservbyport_r is undef, and one of the
2861 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2864 getservent_r_proto (d_getservent_r.U):
2865 This variable encodes the prototype of getservent_r.
2866 It is zero if d_getservent_r is undef, and one of the
2867 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2870 getspnam_r_proto (d_getspnam_r.U):
2871 This variable encodes the prototype of getspnam_r.
2872 It is zero if d_getspnam_r is undef, and one of the
2873 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2877 This variable contains the format string used for printing a Gid_t.
2879 gidsign (gidsign.U):
2880 This variable contains the signedness of a gidtype.
2881 1 for unsigned, -1 for signed.
2883 gidsize (gidsize.U):
2884 This variable contains the size of a gidtype in bytes.
2886 gidtype (gidtype.U):
2887 This variable defines Gid_t to be something like gid_t, int,
2888 ushort, or whatever type is used to declare the return type
2889 of getgid(). Typically, it is the type of group ids in the kernel.
2892 This variable holds the general path (space-separated) used to
2893 find libraries. It may contain directories that do not exist on
2894 this platform, libpth is the cleaned-up version.
2897 This variable is used internally by Configure to determine the
2898 full pathname (if any) of the gmake program. After Configure runs,
2899 the value is reset to a plain "gmake" and is not useful.
2901 gmtime_r_proto (d_gmtime_r.U):
2902 This variable encodes the prototype of gmtime_r.
2903 It is zero if d_gmtime_r is undef, and one of the
2904 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2907 gnulibc_version (d_gnulibc.U):
2908 This variable contains the version number of the GNU C library.
2909 It is usually something like '2.2.5'. It is a plain '' if this
2910 is not the GNU C library, or if the version is unknown.
2913 This variable is used internally by Configure to determine the
2914 full pathname (if any) of the grep program. After Configure runs,
2915 the value is reset to a plain "grep" and is not useful.
2918 This variable contains a command that produces the text of the
2919 /etc/group file. This is normally "cat /etc/group", but can be
2920 "ypcat group" when NIS is used.
2921 On some systems, such as os390, there may be no equivalent
2922 command, in which case this variable is unset.
2924 groupstype (groupstype.U):
2925 This variable defines Groups_t to be something like gid_t, int,
2926 ushort, or whatever type is used for the second argument to
2927 getgroups() and setgroups(). Usually, this is the same as
2928 gidtype (gid_t), but sometimes it isn't.
2931 This variable is used internally by Configure to determine the
2932 full pathname (if any) of the gzip program. After Configure runs,
2933 the value is reset to a plain "gzip" and is not useful.
2935 h_fcntl (h_fcntl.U):
2936 This is variable gets set in various places to tell i_fcntl that
2937 <fcntl.h> should be included.
2939 h_sysfile (h_sysfile.U):
2940 This is variable gets set in various places to tell i_sys_file that
2941 <sys/file.h> should be included.
2944 Gives the type of hints used for previous answers. May be one of
2945 "default", "recommended" or "previous".
2948 This variable contains a command that produces the text of the
2949 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2950 "ypcat hosts" when NIS is used.
2951 On some systems, such as os390, there may be no equivalent
2952 command, in which case this variable is unset.
2954 html1dir (html1dir.U):
2955 This variable contains the name of the directory in which html
2956 source pages are to be put. This directory is for pages
2957 that describe whole programs, not libraries or modules. It
2958 is intended to correspond roughly to section 1 of the Unix
2961 html1direxp (html1dir.U):
2962 This variable is the same as the html1dir variable, but is filename
2963 expanded at configuration time, for convenient use in makefiles.
2965 html3dir (html3dir.U):
2966 This variable contains the name of the directory in which html
2967 source pages are to be put. This directory is for pages
2968 that describe libraries or modules. It is intended to
2969 correspond roughly to section 3 of the Unix manuals.
2971 html3direxp (html3dir.U):
2972 This variable is the same as the html3dir variable, but is filename
2973 expanded at configuration time, for convenient use in makefiles.
2976 This variable is the size of an I16 in bytes.
2979 This variable contains the C type used for Perl's I16.
2982 This variable is the size of an I32 in bytes.
2985 This variable contains the C type used for Perl's I32.
2988 This variable is the size of an I64 in bytes.
2991 This variable contains the C type used for Perl's I64.
2994 This variable is the size of an I8 in bytes.
2997 This variable contains the C type used for Perl's I8.
2999 i_arpainet (i_arpainet.U):
3000 This variable conditionally defines the I_ARPA_INET symbol,
3001 and indicates whether a C program should include <arpa/inet.h>.
3003 i_assert (i_assert.U):
3004 This variable conditionally defines the I_ASSERT symbol, which
3005 indicates to the C program that <assert.h> exists and could be
3008 i_bsdioctl (i_sysioctl.U):
3009 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
3010 indicates to the C program that <sys/bsdioctl.h> exists and should
3013 i_crypt (i_crypt.U):
3014 This variable conditionally defines the I_CRYPT symbol, and indicates
3015 whether a C program should include <crypt.h>.
3018 This variable conditionally defines the I_DB symbol, and indicates
3019 whether a C program may include Berkeley's DB include file <db.h>.
3022 This variable conditionally defines the I_DBM symbol, which
3023 indicates to the C program that <dbm.h> exists and should
3026 i_dirent (i_dirent.U):
3027 This variable conditionally defines I_DIRENT, which indicates
3028 to the C program that it should include <dirent.h>.
3031 This variable conditionally defines the I_DLD symbol, which
3032 indicates to the C program that <dld.h> (GNU dynamic loading)
3033 exists and should be included.
3035 i_dlfcn (i_dlfcn.U):
3036 This variable conditionally defines the I_DLFCN symbol, which
3037 indicates to the C program that <dlfcn.h> exists and should
3040 i_fcntl (i_fcntl.U):
3041 This variable controls the value of I_FCNTL (which tells
3042 the C program to include <fcntl.h>).
3044 i_float (i_float.U):
3045 This variable conditionally defines the I_FLOAT symbol, and indicates
3046 whether a C program may include <float.h> to get symbols like DBL_MAX
3047 or DBL_MIN, i.e. machine dependent floating point values.
3050 This variable conditionally defines the I_FP symbol, and indicates
3051 whether a C program should include <fp.h>.
3053 i_fp_class (i_fp_class.U):
3054 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3055 whether a C program should include <fp_class.h>.
3058 This variable conditionally defines the I_GDBM symbol, which
3059 indicates to the C program that <gdbm.h> exists and should
3062 i_gdbm_ndbm (i_ndbm.U):
3063 This variable conditionally defines the I_GDBM_NDBM symbol, which
3064 indicates to the C program that <gdbm-ndbm.h> exists and should
3065 be included. This is the location of the ndbm.h compatibility file
3068 i_gdbmndbm (i_ndbm.U):
3069 This variable conditionally defines the I_GDBMNDBM symbol, which
3070 indicates to the C program that <gdbm/ndbm.h> exists and should
3071 be included. This was the location of the ndbm.h compatibility file
3075 This variable conditionally defines the I_GRP symbol, and indicates
3076 whether a C program should include <grp.h>.
3078 i_ieeefp (i_ieeefp.U):
3079 This variable conditionally defines the I_IEEEFP symbol, and indicates
3080 whether a C program should include <ieeefp.h>.
3082 i_inttypes (i_inttypes.U):
3083 This variable conditionally defines the I_INTTYPES symbol,
3084 and indicates whether a C program should include <inttypes.h>.
3086 i_langinfo (i_langinfo.U):
3087 This variable conditionally defines the I_LANGINFO symbol,
3088 and indicates whether a C program should include <langinfo.h>.
3090 i_libutil (i_libutil.U):
3091 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3092 whether a C program should include <libutil.h>.
3094 i_limits (i_limits.U):
3095 This variable conditionally defines the I_LIMITS symbol, and indicates
3096 whether a C program may include <limits.h> to get symbols like WORD_BIT
3099 i_locale (i_locale.U):
3100 This variable conditionally defines the I_LOCALE symbol,
3101 and indicates whether a C program should include <locale.h>.
3103 i_machcthr (i_machcthr.U):
3104 This variable conditionally defines the I_MACH_CTHREADS symbol,
3105 and indicates whether a C program should include <mach/cthreads.h>.
3107 i_malloc (i_malloc.U):
3108 This variable conditionally defines the I_MALLOC symbol, and indicates
3109 whether a C program should include <malloc.h>.
3111 i_mallocmalloc (i_mallocmalloc.U):
3112 This variable conditionally defines the I_MALLOCMALLOC symbol,
3113 and indicates whether a C program should include <malloc/malloc.h>.
3116 This variable conditionally defines the I_MATH symbol, and indicates
3117 whether a C program may include <math.h>.
3119 i_memory (i_memory.U):
3120 This variable conditionally defines the I_MEMORY symbol, and indicates
3121 whether a C program should include <memory.h>.
3123 i_mntent (i_mntent.U):
3124 This variable conditionally defines the I_MNTENT symbol, and indicates
3125 whether a C program should include <mntent.h>.
3128 This variable conditionally defines the I_NDBM symbol, which
3129 indicates to the C program that <ndbm.h> exists and should
3132 i_netdb (i_netdb.U):
3133 This variable conditionally defines the I_NETDB symbol, and indicates
3134 whether a C program should include <netdb.h>.
3136 i_neterrno (i_neterrno.U):
3137 This variable conditionally defines the I_NET_ERRNO symbol, which
3138 indicates to the C program that <net/errno.h> exists and should
3141 i_netinettcp (i_netinettcp.U):
3142 This variable conditionally defines the I_NETINET_TCP symbol,
3143 and indicates whether a C program should include <netinet/tcp.h>.
3146 This variable conditionally defines I_NETINET_IN, which indicates
3147 to the C program that it should include <netinet/in.h>. Otherwise,
3148 you may try <sys/in.h>.
3151 This variable conditionally defines the I_POLL symbol, and indicates
3152 whether a C program should include <poll.h>.
3155 This variable conditionally defines the I_PROT symbol, and indicates
3156 whether a C program should include <prot.h>.
3158 i_pthread (i_pthread.U):
3159 This variable conditionally defines the I_PTHREAD symbol,
3160 and indicates whether a C program should include <pthread.h>.
3163 This variable conditionally defines I_PWD, which indicates
3164 to the C program that it should include <pwd.h>.
3166 i_rpcsvcdbm (i_dbm.U):
3167 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3168 indicates to the C program that <rpcsvc/dbm.h> exists and should
3169 be included. Some System V systems might need this instead of <dbm.h>.
3172 This variable conditionally defines the I_SFIO symbol,
3173 and indicates whether a C program should include <sfio.h>.
3175 i_sgtty (i_termio.U):
3176 This variable conditionally defines the I_SGTTY symbol, which
3177 indicates to the C program that it should include <sgtty.h> rather
3180 i_shadow (i_shadow.U):
3181 This variable conditionally defines the I_SHADOW symbol, and indicates
3182 whether a C program should include <shadow.h>.
3184 i_socks (i_socks.U):
3185 This variable conditionally defines the I_SOCKS symbol, and indicates
3186 whether a C program should include <socks.h>.
3188 i_stdarg (i_varhdr.U):
3189 This variable conditionally defines the I_STDARG symbol, which
3190 indicates to the C program that <stdarg.h> exists and should
3193 i_stdbool (i_stdbool.U):
3194 This variable conditionally defines the I_STDBOOL symbol, which
3195 indicates to the C program that <stdbool.h> exists and should
3198 i_stddef (i_stddef.U):
3199 This variable conditionally defines the I_STDDEF symbol, which
3200 indicates to the C program that <stddef.h> exists and should
3203 i_stdlib (i_stdlib.U):
3204 This variable conditionally defines the I_STDLIB symbol, which
3205 indicates to the C program that <stdlib.h> exists and should
3208 i_string (i_string.U):
3209 This variable conditionally defines the I_STRING symbol, which
3210 indicates that <string.h> should be included rather than <strings.h>.
3212 i_sunmath (i_sunmath.U):
3213 This variable conditionally defines the I_SUNMATH symbol, and indicates
3214 whether a C program should include <sunmath.h>.
3216 i_sysaccess (i_sysaccess.U):
3217 This variable conditionally defines the I_SYS_ACCESS symbol,
3218 and indicates whether a C program should include <sys/access.h>.
3220 i_sysdir (i_sysdir.U):
3221 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3222 whether a C program should include <sys/dir.h>.
3224 i_sysfile (i_sysfile.U):
3225 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3226 whether a C program should include <sys/file.h> to get R_OK and friends.
3228 i_sysfilio (i_sysioctl.U):
3229 This variable conditionally defines the I_SYS_FILIO symbol, which
3230 indicates to the C program that <sys/filio.h> exists and should
3231 be included in preference to <sys/ioctl.h>.
3234 This variable conditionally defines I_SYS_IN, which indicates
3235 to the C program that it should include <sys/in.h> instead of
3238 i_sysioctl (i_sysioctl.U):
3239 This variable conditionally defines the I_SYS_IOCTL symbol, which
3240 indicates to the C program that <sys/ioctl.h> exists and should
3243 i_syslog (i_syslog.U):
3244 This variable conditionally defines the I_SYSLOG symbol,
3245 and indicates whether a C program should include <syslog.h>.
3247 i_sysmman (i_sysmman.U):
3248 This variable conditionally defines the I_SYS_MMAN symbol, and
3249 indicates whether a C program should include <sys/mman.h>.
3251 i_sysmode (i_sysmode.U):
3252 This variable conditionally defines the I_SYSMODE symbol,
3253 and indicates whether a C program should include <sys/mode.h>.
3255 i_sysmount (i_sysmount.U):
3256 This variable conditionally defines the I_SYSMOUNT symbol,
3257 and indicates whether a C program should include <sys/mount.h>.
3259 i_sysndir (i_sysndir.U):
3260 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3261 whether a C program should include <sys/ndir.h>.
3263 i_sysparam (i_sysparam.U):
3264 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3265 whether a C program should include <sys/param.h>.
3267 i_syspoll (i_syspoll.U):
3268 This variable conditionally defines the I_SYS_POLL symbol, which
3269 indicates to the C program that it should include <sys/poll.h>.
3271 i_sysresrc (i_sysresrc.U):
3272 This variable conditionally defines the I_SYS_RESOURCE symbol,
3273 and indicates whether a C program should include <sys/resource.h>.
3275 i_syssecrt (i_syssecrt.U):
3276 This variable conditionally defines the I_SYS_SECURITY symbol,
3277 and indicates whether a C program should include <sys/security.h>.
3279 i_sysselct (i_sysselct.U):
3280 This variable conditionally defines I_SYS_SELECT, which indicates
3281 to the C program that it should include <sys/select.h> in order to
3282 get the definition of struct timeval.
3284 i_syssockio (i_sysioctl.U):
3285 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3286 C program that socket ioctl codes may be found in <sys/sockio.h>
3287 instead of <sys/ioctl.h>.
3289 i_sysstat (i_sysstat.U):
3290 This variable conditionally defines the I_SYS_STAT symbol,
3291 and indicates whether a C program should include <sys/stat.h>.
3293 i_sysstatfs (i_sysstatfs.U):
3294 This variable conditionally defines the I_SYSSTATFS symbol,
3295 and indicates whether a C program should include <sys/statfs.h>.
3297 i_sysstatvfs (i_sysstatvfs.U):
3298 This variable conditionally defines the I_SYSSTATVFS symbol,
3299 and indicates whether a C program should include <sys/statvfs.h>.
3301 i_systime (i_time.U):
3302 This variable conditionally defines I_SYS_TIME, which indicates
3303 to the C program that it should include <sys/time.h>.
3305 i_systimek (i_time.U):
3306 This variable conditionally defines I_SYS_TIME_KERNEL, which
3307 indicates to the C program that it should include <sys/time.h>
3308 with KERNEL defined.
3310 i_systimes (i_systimes.U):
3311 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3312 whether a C program should include <sys/times.h>.
3314 i_systypes (i_systypes.U):
3315 This variable conditionally defines the I_SYS_TYPES symbol,
3316 and indicates whether a C program should include <sys/types.h>.
3318 i_sysuio (i_sysuio.U):
3319 This variable conditionally defines the I_SYSUIO symbol, and indicates
3320 whether a C program should include <sys/uio.h>.
3322 i_sysun (i_sysun.U):
3323 This variable conditionally defines I_SYS_UN, which indicates
3324 to the C program that it should include <sys/un.h> to get UNIX
3325 domain socket definitions.
3327 i_sysutsname (i_sysutsname.U):
3328 This variable conditionally defines the I_SYSUTSNAME symbol,
3329 and indicates whether a C program should include <sys/utsname.h>.
3331 i_sysvfs (i_sysvfs.U):
3332 This variable conditionally defines the I_SYSVFS symbol,
3333 and indicates whether a C program should include <sys/vfs.h>.
3335 i_syswait (i_syswait.U):
3336 This variable conditionally defines I_SYS_WAIT, which indicates
3337 to the C program that it should include <sys/wait.h>.
3339 i_termio (i_termio.U):
3340 This variable conditionally defines the I_TERMIO symbol, which
3341 indicates to the C program that it should include <termio.h> rather
3344 i_termios (i_termio.U):
3345 This variable conditionally defines the I_TERMIOS symbol, which
3346 indicates to the C program that the POSIX <termios.h> file is
3350 This variable conditionally defines I_TIME, which indicates
3351 to the C program that it should include <time.h>.
3353 i_unistd (i_unistd.U):
3354 This variable conditionally defines the I_UNISTD symbol, and indicates
3355 whether a C program should include <unistd.h>.
3357 i_ustat (i_ustat.U):
3358 This variable conditionally defines the I_USTAT symbol, and indicates
3359 whether a C program should include <ustat.h>.
3361 i_utime (i_utime.U):
3362 This variable conditionally defines the I_UTIME symbol, and indicates
3363 whether a C program should include <utime.h>.
3365 i_values (i_values.U):
3366 This variable conditionally defines the I_VALUES symbol, and indicates
3367 whether a C program may include <values.h> to get symbols like MAXLONG
3370 i_varargs (i_varhdr.U):
3371 This variable conditionally defines I_VARARGS, which indicates
3372 to the C program that it should include <varargs.h>.
3374 i_varhdr (i_varhdr.U):
3375 Contains the name of the header to be included to get va_dcl definition.
3376 Typically one of varargs.h or stdarg.h.
3378 i_vfork (i_vfork.U):
3379 This variable conditionally defines the I_VFORK symbol, and indicates
3380 whether a C program should include vfork.h.
3382 ignore_versioned_solibs (libs.U):
3383 This variable should be non-empty if non-versioned shared
3384 libraries (libfoo.so.x.y) are to be ignored (because they
3385 cannot be linked against).
3387 inc_version_list (inc_version_list.U):
3388 This variable specifies the list of subdirectories in over
3389 which perl.c:incpush() and lib/lib.pm will automatically
3390 search when adding directories to @INC. The elements in
3391 the list are separated by spaces. This is only useful
3392 if you have a perl library directory tree structured like the
3393 default one. See INSTALL for how this works. The versioned
3394 site_perl directory was introduced in 5.005, so that is the
3395 lowest possible value.
3397 This list includes architecture-dependent directories back to
3398 version $api_versionstring (e.g. 5.5.640) and
3399 architecture-independent directories all the way back to
3402 inc_version_list_init (inc_version_list.U):
3403 This variable holds the same list as inc_version_list, but
3404 each item is enclosed in double quotes and separated by commas,
3405 suitable for use in the PERL_INC_VERSION_LIST initialization.
3408 This variable must precede the normal include path to get the
3409 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
3410 Value can be "" or "/bsd43" on mips.
3413 This variable is defined but not used by Configure.
3414 The value is the empty string and is not useful.
3416 initialinstalllocation (bin.U):
3417 When userelocatableinc is true, this variable holds the location
3418 that make install should copy the perl binary to, with all the
3419 run-time relocatable paths calculated from this at install time.
3420 When used, it is initialized to the original value of binexp, and
3421 then binexp is set to '.../', as the other binaries are found
3422 relative to the perl binary.
3424 installarchlib (archlib.U):
3425 This variable is really the same as archlibexp but may differ on
3426 those systems using AFS. For extra portability, only this variable
3427 should be used in makefiles.
3430 This variable is the same as binexp unless AFS is running in which case
3431 the user is explicitly prompted for it. This variable should always
3432 be used in your makefiles for maximum portability.
3434 installhtml1dir (html1dir.U):
3435 This variable is really the same as html1direxp, unless you are
3436 using a different installprefix. For extra portability, you
3437 should only use this variable within your makefiles.
3439 installhtml3dir (html3dir.U):
3440 This variable is really the same as html3direxp, unless you are
3441 using a different installprefix. For extra portability, you
3442 should only use this variable within your makefiles.
3444 installman1dir (man1dir.U):
3445 This variable is really the same as man1direxp, unless you are using
3446 AFS in which case it points to the read/write location whereas
3447 man1direxp only points to the read-only access location. For extra
3448 portability, you should only use this variable within your makefiles.
3450 installman3dir (man3dir.U):
3451 This variable is really the same as man3direxp, unless you are using
3452 AFS in which case it points to the read/write location whereas
3453 man3direxp only points to the read-only access location. For extra
3454 portability, you should only use this variable within your makefiles.
3456 installprefix (installprefix.U):
3457 This variable holds the name of the directory below which
3458 "make install" will install the package. For most users, this
3459 is the same as prefix. However, it is useful for
3460 installing the software into a different (usually temporary)
3461 location after which it can be bundled up and moved somehow
3462 to the final location specified by prefix.
3464 installprefixexp (installprefix.U):
3465 This variable holds the full absolute path of installprefix
3466 with all ~-expansion done.
3468 installprivlib (privlib.U):
3469 This variable is really the same as privlibexp but may differ on
3470 those systems using AFS. For extra portability, only this variable
3471 should be used in makefiles.
3473 installscript (scriptdir.U):
3474 This variable is usually the same as scriptdirexp, unless you are on
3475 a system running AFS, in which case they may differ slightly. You
3476 should always use this variable within your makefiles for portability.
3478 installsitearch (sitearch.U):
3479 This variable is really the same as sitearchexp but may differ on
3480 those systems using AFS. For extra portability, only this variable
3481 should be used in makefiles.
3483 installsitebin (sitebin.U):
3484 This variable is usually the same as sitebinexp, unless you are on
3485 a system running AFS, in which case they may differ slightly. You
3486 should always use this variable within your makefiles for portability.
3488 installsitehtml1dir (sitehtml1dir.U):
3489 This variable is really the same as sitehtml1direxp, unless you are using
3490 AFS in which case it points to the read/write location whereas
3491 html1direxp only points to the read-only access location. For extra
3492 portability, you should only use this variable within your makefiles.
3494 installsitehtml3dir (sitehtml3dir.U):
3495 This variable is really the same as sitehtml3direxp, unless you are using
3496 AFS in which case it points to the read/write location whereas
3497 html3direxp only points to the read-only access location. For extra
3498 portability, you should only use this variable within your makefiles.
3500 installsitelib (sitelib.U):
3501 This variable is really the same as sitelibexp but may differ on
3502 those systems using AFS. For extra portability, only this variable
3503 should be used in makefiles.
3505 installsiteman1dir (siteman1dir.U):
3506 This variable is really the same as siteman1direxp, unless you are using
3507 AFS in which case it points to the read/write location whereas
3508 man1direxp only points to the read-only access location. For extra
3509 portability, you should only use this variable within your makefiles.
3511 installsiteman3dir (siteman3dir.U):
3512 This variable is really the same as siteman3direxp, unless you are using
3513 AFS in which case it points to the read/write location whereas
3514 man3direxp only points to the read-only access location. For extra
3515 portability, you should only use this variable within your makefiles.
3517 installsitescript (sitescript.U):
3518 This variable is usually the same as sitescriptexp, unless you are on
3519 a system running AFS, in which case they may differ slightly. You
3520 should always use this variable within your makefiles for portability.
3522 installstyle (installstyle.U):
3523 This variable describes the "style" of the perl installation.
3524 This is intended to be useful for tools that need to
3525 manipulate entire perl distributions. Perl itself doesn't use
3526 this to find its libraries -- the library directories are
3527 stored directly in Config.pm. Currently, there are only two
3528 styles: "lib" and "lib/perl5". The default library locations
3529 (e.g. privlib, sitelib) are either $prefix/lib or
3530 $prefix/lib/perl5. The former is useful if $prefix is a
3531 directory dedicated to perl (e.g. /opt/perl), while the latter
3532 is useful if $prefix is shared by many packages, e.g. if
3535 Unfortunately, while this "style" variable is used to set
3536 defaults for all three directory hierarchies (core, vendor, and
3537 site), there is no guarantee that the same style is actually
3538 appropriate for all those directories. For example, $prefix
3539 might be /opt/perl, but $siteprefix might be /usr/local.
3540 (Perhaps, in retrospect, the "lib" style should never have been
3541 supported, but it did seem like a nice idea at the time.)
3543 The situation is even less clear for tools such as MakeMaker
3544 that can be used to install additional modules into
3545 non-standard places. For example, if a user intends to install
3546 a module into a private directory (perhaps by setting PREFIX on
3547 the Makefile.PL command line), then there is no reason to
3548 assume that the Configure-time $installstyle setting will be
3549 relevant for that PREFIX.
3551 This may later be extended to include other information, so
3552 be careful with pattern-matching on the results.
3554 For compatibility with perl5.005 and earlier, the default
3555 setting is based on whether or not $prefix contains the string
3558 installusrbinperl (instubperl.U):
3559 This variable tells whether Perl should be installed also as
3560 /usr/bin/perl in addition to
3563 installvendorarch (vendorarch.U):
3564 This variable is really the same as vendorarchexp but may differ on
3565 those systems using AFS. For extra portability, only this variable
3566 should be used in makefiles.
3568 installvendorbin (vendorbin.U):
3569 This variable is really the same as vendorbinexp but may differ on
3570 those systems using AFS. For extra portability, only this variable
3571 should be used in makefiles.
3573 installvendorhtml1dir (vendorhtml1dir.U):
3574 This variable is really the same as vendorhtml1direxp but may differ on
3575 those systems using AFS. For extra portability, only this variable
3576 should be used in makefiles.
3578 installvendorhtml3dir (vendorhtml3dir.U):
3579 This variable is really the same as vendorhtml3direxp but may differ on
3580 those systems using AFS. For extra portability, only this variable
3581 should be used in makefiles.
3583 installvendorlib (vendorlib.U):
3584 This variable is really the same as vendorlibexp but may differ on
3585 those systems using AFS. For extra portability, only this variable
3586 should be used in makefiles.
3588 installvendorman1dir (vendorman1dir.U):
3589 This variable is really the same as vendorman1direxp but may differ on
3590 those systems using AFS. For extra portability, only this variable
3591 should be used in makefiles.
3593 installvendorman3dir (vendorman3dir.U):
3594 This variable is really the same as vendorman3direxp but may differ on
3595 those systems using AFS. For extra portability, only this variable
3596 should be used in makefiles.
3598 installvendorscript (vendorscript.U):
3599 This variable is really the same as vendorscriptexp but may differ on
3600 those systems using AFS. For extra portability, only this variable
3601 should be used in makefiles.
3603 intsize (intsize.U):
3604 This variable contains the value of the INTSIZE symbol, which
3605 indicates to the C program how many bytes there are in an int.
3607 issymlink (issymlink.U):
3608 This variable holds the test command to test for a symbolic link
3609 (if they are supported). Typical values include 'test -h' and
3612 ivdformat (perlxvf.U):
3613 This variable contains the format string used for printing
3614 a Perl IV as a signed decimal integer.
3617 This variable is the size of an IV in bytes.
3620 This variable contains the C type used for Perl's IV.
3622 known_extensions (Extensions.U):
3623 This variable holds a list of all XS extensions included in
3627 This variable is defined but not used by Configure.
3628 The value is the empty string and is not useful.
3631 This variable indicates the program to be used to link
3632 libraries for dynamic loading. On some systems, it is 'ld'.
3633 On ELF systems, it should be $cc. Mostly, we'll try to respect
3634 the hint file setting.
3636 ld_can_script (dlsrc.U):
3637 This variable shows if the loader accepts scripts in the form of
3638 -Wl,--version-script=ld.script. This is currently only supported
3639 for GNU ld on ELF in dynamic loading builds.
3641 lddlflags (dlsrc.U):
3642 This variable contains any special flags that might need to be
3643 passed to $ld to create a shared library suitable for dynamic
3644 loading. It is up to the makefile to use it. For hpux, it
3645 should be '-b'. For sunos 4.1, it is empty.
3647 ldflags (ccflags.U):
3648 This variable contains any additional C loader flags desired by
3649 the user. It is up to the Makefile to use this.
3651 ldflags_uselargefiles (uselfs.U):
3652 This variable contains the loader flags needed by large file builds
3653 and added to ldflags by hints files.
3655 ldlibpthname (libperl.U):
3656 This variable holds the name of the shared library
3657 search path, often LD_LIBRARY_PATH. To get an empty
3658 string, the hints file must set this to 'none'.
3661 This variable is used internally by Configure to determine the
3662 full pathname (if any) of the less program. After Configure runs,
3663 the value is reset to a plain "less" and is not useful.
3666 This is an old synonym for _a.
3669 This variable contains the location of the C library.
3671 libperl (libperl.U):
3672 The perl executable is obtained by linking perlmain.c with
3673 libperl, any static extensions (usually just DynaLoader),
3674 and any other libraries needed on this system. libperl
3675 is usually libperl.a, but can also be libperl.so.xxx if
3676 the user wishes to build a perl executable with a shared
3680 This variable holds the general path (space-separated) used to find
3681 libraries. It is intended to be used by other units.
3684 This variable holds the additional libraries we want to use.
3685 It is up to the Makefile to deal with it. The list can be empty.
3688 This variable holds the directory names aka dirnames of the libraries
3689 we found and accepted, duplicates are removed.
3692 This variable holds the filenames aka basenames of the libraries
3693 we found and accepted.
3696 This variable holds the full pathnames of the libraries
3697 we found and accepted.
3700 This variable holds the directory names probed for libraries.
3702 libswanted (Myinit.U):
3703 This variable holds a list of all the libraries we want to
3704 search. The order is chosen to pick up the c library
3705 ahead of ucb or bsd libraries for SVR4.
3707 libswanted_uselargefiles (uselfs.U):
3708 This variable contains the libraries needed by large file builds
3709 and added to ldflags by hints files. It is a space separated list
3710 of the library names without the "lib" prefix or any suffix, just
3714 This variable is defined but not used by Configure.
3715 The value is the empty string and is not useful.
3718 This variable is defined but not used by Configure.
3719 The value is the empty string and is not useful.
3721 lkflags (ccflags.U):
3722 This variable contains any additional C partial linker flags desired by
3723 the user. It is up to the Makefile to use this.
3726 This variable is used internally by Configure to determine the
3727 full pathname (if any) of the ln program. After Configure runs,
3728 the value is reset to a plain "ln" and is not useful.
3731 This variable holds the name of the command to make
3732 symbolic links (if they are supported). It can be used
3733 in the Makefile. It is either 'ln -s' or 'ln'
3735 localtime_r_proto (d_localtime_r.U):
3736 This variable encodes the prototype of localtime_r.
3737 It is zero if d_localtime_r is undef, and one of the
3738 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3741 locincpth (ccflags.U):
3742 This variable contains a list of additional directories to be
3743 searched by the compiler. The appropriate '-I' directives will
3744 be added to ccflags. This is intended to simplify setting
3745 local directories from the Configure command line.
3746 It's not much, but it parallels the loclibpth stuff in libpth.U.
3748 loclibpth (libpth.U):
3749 This variable holds the paths (space-separated) used to find local
3750 libraries. It is prepended to libpth, and is intended to be easily
3751 set from the command line.
3753 longdblsize (d_longdbl.U):
3754 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3755 indicates to the C program how many bytes there are in a long double,
3756 if this system supports long doubles.
3758 longlongsize (d_longlong.U):
3759 This variable contains the value of the LONGLONGSIZE symbol, which
3760 indicates to the C program how many bytes there are in a long long,
3761 if this system supports long long.
3763 longsize (intsize.U):
3764 This variable contains the value of the LONGSIZE symbol, which
3765 indicates to the C program how many bytes there are in a long.
3768 This variable is defined but not used by Configure.
3769 The value is the empty string and is not useful.
3772 This variable is defined but not used by Configure.
3773 The value is the empty string and is not useful.
3776 This variable is used internally by Configure to determine the
3777 full pathname (if any) of the ls program. After Configure runs,
3778 the value is reset to a plain "ls" and is not useful.
3780 lseeksize (lseektype.U):
3781 This variable defines lseektype to be something like off_t, long,
3782 or whatever type is used to declare lseek offset's type in the
3783 kernel (which also appears to be lseek's return type).
3785 lseektype (lseektype.U):
3786 This variable defines lseektype to be something like off_t, long,
3787 or whatever type is used to declare lseek offset's type in the
3788 kernel (which also appears to be lseek's return type).
3791 This variable indicates that the Misc Attribute Definition code is to
3795 If the Misc Attribute Decoration is to be compiled, this variable is
3796 set to the name of the extra header files to be used, else it is ''
3799 If the Misc Attribute Decoration is to be compiled, this variable is
3800 set to the name of the extra object files to be used, else it is ''
3803 If the Misc Attribute Decoration is to be compiled, this variable is
3804 set to the name of the extra C source files to be used, else it is ''
3807 This variable is defined but not used by Configure.
3808 The value is the empty string and is not useful.
3811 This variable is defined but not used by Configure.
3812 The value is the empty string and is not useful.
3815 This variable is used internally by Configure to determine the
3816 full pathname (if any) of the make program. After Configure runs,
3817 the value is reset to a plain "make" and is not useful.
3819 make_set_make (make.U):
3820 Some versions of 'make' set the variable MAKE. Others do not.
3821 This variable contains the string to be included in Makefile.SH
3822 so that MAKE is set if needed, and not if not needed.
3823 Possible values are:
3825 make_set_make='#' # If your make program handles this for you,
3827 make_set_make="MAKE=$make" # if it doesn't.
3829 This uses a comment character so that we can distinguish a
3830 'set' value (from a previous config.sh or Configure '-D' option)
3831 from an uncomputed value.
3833 mallocobj (mallocsrc.U):
3834 This variable contains the name of the malloc.o that this package
3835 generates, if that malloc.o is preferred over the system malloc.
3836 Otherwise the value is null. This variable is intended for generating
3837 Makefiles. See mallocsrc.
3839 mallocsrc (mallocsrc.U):
3840 This variable contains the name of the malloc.c that comes with
3841 the package, if that malloc.c is preferred over the system malloc.
3842 Otherwise the value is null. This variable is intended for generating
3845 malloctype (mallocsrc.U):
3846 This variable contains the kind of ptr returned by malloc and realloc.
3848 man1dir (man1dir.U):
3849 This variable contains the name of the directory in which manual
3850 source pages are to be put. It is the responsibility of the
3851 Makefile.SH to get the value of this into the proper command.
3852 You must be prepared to do the ~name expansion yourself.
3854 man1direxp (man1dir.U):
3855 This variable is the same as the man1dir variable, but is filename
3856 expanded at configuration time, for convenient use in makefiles.
3858 man1ext (man1dir.U):
3859 This variable contains the extension that the manual page should
3860 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3863 man3dir (man3dir.U):
3864 This variable contains the name of the directory in which manual
3865 source pages are to be put. It is the responsibility of the
3866 Makefile.SH to get the value of this into the proper command.
3867 You must be prepared to do the ~name expansion yourself.
3869 man3direxp (man3dir.U):
3870 This variable is the same as the man3dir variable, but is filename
3871 expanded at configuration time, for convenient use in makefiles.
3873 man3ext (man3dir.U):
3874 This variable contains the extension that the manual page should
3875 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3878 mips_type (usrinc.U):
3879 This variable holds the environment type for the mips system.
3880 Possible values are "BSD 4.3" and "System V".
3882 mistrustnm (Csym.U):
3883 This variable can be used to establish a fallthrough for the cases
3884 where nm fails to find a symbol. If usenm is false or usenm is true
3885 and mistrustnm is false, this variable has no effect. If usenm is true
3886 and mistrustnm is "compile", a test program will be compiled to try to
3887 find any symbol that can't be located via nm lookup. If mistrustnm is
3888 "run", the test program will be run as well as being compiled.
3891 This variable is used internally by Configure to determine the
3892 full pathname (if any) of the mkdir program. After Configure runs,
3893 the value is reset to a plain "mkdir" and is not useful.
3895 mmaptype (d_mmap.U):
3896 This symbol contains the type of pointer returned by mmap()
3897 (and simultaneously the type of the first argument).
3898 It can be 'void *' or 'caddr_t'.
3900 modetype (modetype.U):
3901 This variable defines modetype to be something like mode_t,
3902 int, unsigned short, or whatever type is used to declare file
3903 modes for system calls.
3906 This variable is used internally by Configure to determine the
3907 full pathname (if any) of the more program. After Configure runs,
3908 the value is reset to a plain "more" and is not useful.
3910 multiarch (multiarch.U):
3911 This variable conditionally defines the MULTIARCH symbol
3912 which signifies the presence of multiplatform files.
3913 This is normally set by hints files.
3916 This variable is defined but not used by Configure.
3917 The value is the empty string and is not useful.
3919 myarchname (archname.U):
3920 This variable holds the architecture name computed by Configure in
3921 a previous run. It is not intended to be perused by any user and
3922 should never be set in a hint file.
3924 mydomain (myhostname.U):
3925 This variable contains the eventual value of the MYDOMAIN symbol,
3926 which is the domain of the host the program is going to run on.
3927 The domain must be appended to myhostname to form a complete host name.
3928 The dot comes with mydomain, and need not be supplied by the program.
3930 myhostname (myhostname.U):
3931 This variable contains the eventual value of the MYHOSTNAME symbol,
3932 which is the name of the host the program is going to run on.
3933 The domain is not kept with hostname, but must be gotten from mydomain.
3934 The dot comes with mydomain, and need not be supplied by the program.
3936 myuname (Oldconfig.U):
3937 The output of 'uname -a' if available, otherwise the hostname.
3938 The whole thing is then lower-cased and slashes and single quotes are
3942 This variable contains the '-n' flag if that is what causes the echo
3943 command to suppress newline. Otherwise it is null. Correct usage is
3944 $echo $n "prompt for a question: $c".
3946 need_va_copy (need_va_copy.U):
3947 This symbol, if defined, indicates that the system stores
3948 the variable argument list datatype, va_list, in a format
3949 that cannot be copied by simple assignment, so that some
3950 other means must be used when copying is required.
3951 As such systems vary in their provision (or non-provision)
3952 of copying mechanisms, handy.h defines a platform-
3953 independent macro, Perl_va_copy(src, dst), to do the job.
3955 netdb_hlen_type (netdbtype.U):
3956 This variable holds the type used for the 2nd argument to
3957 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3958 This is only useful if you have gethostbyaddr(), naturally.
3960 netdb_host_type (netdbtype.U):
3961 This variable holds the type used for the 1st argument to
3962 gethostbyaddr(). Usually, this is char * or void *, possibly
3963 with or without a const prefix.
3964 This is only useful if you have gethostbyaddr(), naturally.
3966 netdb_name_type (netdbtype.U):
3967 This variable holds the type used for the argument to
3968 gethostbyname(). Usually, this is char * or const char *.
3969 This is only useful if you have gethostbyname(), naturally.
3971 netdb_net_type (netdbtype.U):
3972 This variable holds the type used for the 1st argument to
3973 getnetbyaddr(). Usually, this is int or long.
3974 This is only useful if you have getnetbyaddr(), naturally.
3977 This variable is used internally by Configure to determine the
3978 full pathname (if any) of the nm program. After Configure runs,
3979 the value is reset to a plain "nm" and is not useful.
3982 This variable holds the options that may be necessary for nm.
3984 nm_so_opt (usenm.U):
3985 This variable holds the options that may be necessary for nm
3986 to work on a shared library but that can not be used on an
3987 archive library. Currently, this is only used by Linux, where
3988 nm --dynamic is *required* to get symbols from an ELF library which
3989 has been stripped, but nm --dynamic is *fatal* on an archive library.
3990 Maybe Linux should just always set usenm=false.
3992 nonxs_ext (Extensions.U):
3993 This variable holds a list of all non-xs extensions included
3994 in the package. All of them will be built.
3997 This variable is used internally by Configure to determine the
3998 full pathname (if any) of the nroff program. After Configure runs,
3999 the value is reset to a plain "nroff" and is not useful.
4001 nv_overflows_integers_at (perlxv.U):
4002 This variable gives the largest integer value that NVs can hold
4003 as a constant floating point expression.
4004 If it could not be determined, it holds the value 0.
4006 nv_preserves_uv_bits (perlxv.U):
4007 This variable indicates how many of bits type uvtype
4008 a variable nvtype can preserve.
4010 nveformat (perlxvf.U):
4011 This variable contains the format string used for printing
4012 a Perl NV using %e-ish floating point format.
4014 nvEUformat (perlxvf.U):
4015 This variable contains the format string used for printing
4016 a Perl NV using %E-ish floating point format.
4018 nvfformat (perlxvf.U):
4019 This variable contains the format string used for printing
4020 a Perl NV using %f-ish floating point format.
4022 nvFUformat (perlxvf.U):
4023 This variable contains the format string used for printing
4024 a Perl NV using %F-ish floating point format.
4026 nvgformat (perlxvf.U):
4027 This variable contains the format string used for printing
4028 a Perl NV using %g-ish floating point format.
4030 nvGUformat (perlxvf.U):
4031 This variable contains the format string used for printing
4032 a Perl NV using %G-ish floating point format.
4035 This variable is the size of an NV in bytes.
4038 This variable contains the C type used for Perl's NV.
4040 o_nonblock (nblock_io.U):
4041 This variable bears the symbol value to be used during open() or fcntl()
4042 to turn on non-blocking I/O for a file descriptor. If you wish to switch
4043 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
4044 but that is only supported by some devices.
4047 This is an old synonym for _o.
4049 old_pthread_create_joinable (d_pthrattrj.U):
4050 This variable defines the constant to use for creating joinable
4051 (aka undetached) pthreads. Unused if pthread.h defines
4052 PTHREAD_CREATE_JOINABLE. If used, possible values are
4053 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
4055 optimize (ccflags.U):
4056 This variable contains any optimizer/debugger flag that should be used.
4057 It is up to the Makefile to use it.
4059 orderlib (orderlib.U):
4060 This variable is "true" if the components of libraries must be ordered
4061 (with `lorder $* | tsort`) before placing them in an archive. Set to
4062 "false" if ranlib or ar can generate random libraries.
4064 osname (Oldconfig.U):
4065 This variable contains the operating system name (e.g. sunos,
4066 solaris, hpux, etc.). It can be useful later on for setting
4067 defaults. Any spaces are replaced with underscores. It is set
4068 to a null string if we can't figure it out.
4070 osvers (Oldconfig.U):
4071 This variable contains the operating system version (e.g.
4072 4.1.3, 5.2, etc.). It is primarily used for helping select
4073 an appropriate hints file, but might be useful elsewhere for
4074 setting defaults. It is set to '' if we can't figure it out.
4075 We try to be flexible about how much of the version number
4076 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
4077 same for this package, hints files might just be os_4.0 or
4078 os_4.1, etc., not keeping separate files for each little release.
4080 otherlibdirs (otherlibdirs.U):
4081 This variable contains a colon-separated set of paths for the perl
4082 binary to search for additional library files or modules.
4083 These directories will be tacked to the end of @INC.
4084 Perl will automatically search below each path for version-
4085 and architecture-specific directories. See inc_version_list
4087 A value of ' ' means 'none' and is used to preserve this value
4088 for the next run through Configure.
4090 package (package.U):
4091 This variable contains the name of the package being constructed.
4092 It is primarily intended for the use of later Configure units.
4095 This variable contains the name of the preferred pager on the system.
4096 Usual values are (the full pathnames of) more, less, pg, or cat.
4099 This variable contains a command that produces the text of the
4100 /etc/passwd file. This is normally "cat /etc/passwd", but can be
4101 "ypcat passwd" when NIS is used.
4102 On some systems, such as os390, there may be no equivalent
4103 command, in which case this variable is unset.
4105 patchlevel (patchlevel.U):
4106 The patchlevel level of this package.
4107 The value of patchlevel comes from the patchlevel.h file.
4108 In a version number such as 5.6.1, this is the "6".
4109 In patchlevel.h, this is referred to as "PERL_VERSION".
4112 This is an old synonym for p_ in Head.U, the character
4113 used to separate elements in the command shell search PATH.
4116 This variable is used internally by Configure to determine the
4117 full pathname (if any) of the perl program. After Configure runs,
4118 the value is reset to a plain "perl" and is not useful.
4121 This variable contains the full path (if any) to a previously
4122 installed perl5.005 or later suitable for running the script
4123 to determine inc_version_list.
4125 PERL_API_REVISION (patchlevel.h):
4126 This number describes the earliest compatible PERL_REVISION of
4127 Perl ("compatibility" here being defined as sufficient binary/API
4128 compatibility to run XS code built with the older version).
4129 Normally this does not change across maintenance releases.
4130 Please read the comment in patchlevel.h.
4132 PERL_API_SUBVERSION (patchlevel.h):
4133 This number describes the earliest compatible PERL_SUBVERSION of
4134 Perl ("compatibility" here being defined as sufficient binary/API
4135 compatibility to run XS code built with the older version).
4136 Normally this does not change across maintenance releases.
4137 Please read the comment in patchlevel.h.
4139 PERL_API_VERSION (patchlevel.h):
4140 This number describes the earliest compatible PERL_VERSION of
4141 Perl ("compatibility" here being defined as sufficient binary/API
4142 compatibility to run XS code built with the older version).
4143 Normally this does not change across maintenance releases.
4144 Please read the comment in patchlevel.h.
4146 PERL_CONFIG_SH (Oldsyms.U):
4147 This is set to 'true' in config.sh so that a shell script
4148 sourcing config.sh can tell if it has been sourced already.
4150 PERL_PATCHLEVEL (Oldsyms.U):
4151 This symbol reflects the patchlevel, if available. Will usually
4152 come from the .patch file, which is available when the perl
4153 source tree was fetched with rsync.
4155 perl_patchlevel (patchlevel.U):
4156 This is the Perl patch level, a numeric change identifier,
4157 as defined by whichever source code maintenance system
4158 is used to maintain the patches; currently Perforce.
4159 It does not correlate with the Perl version numbers or
4160 the maintenance versus development dichotomy except
4161 by also being increasing.
4163 PERL_REVISION (Oldsyms.U):
4164 In a Perl version number such as 5.6.2, this is the 5.
4165 This value is manually set in patchlevel.h
4167 perl_static_inline (d_static_inline.U):
4168 This variable defines the PERL_STATIC_INLINE symbol to
4169 the best-guess incantation to use for static inline functions.
4170 Possibilities include
4172 static __inline__ (gcc -ansi)
4173 static __inline (MSVC)
4174 static _inline (older MSVC)
4175 static (c89 compilers)
4177 PERL_SUBVERSION (Oldsyms.U):
4178 In a Perl version number such as 5.6.2, this is the 2.
4179 Values greater than 50 represent potentially unstable
4180 development subversions.
4181 This value is manually set in patchlevel.h
4183 PERL_VERSION (Oldsyms.U):
4184 In a Perl version number such as 5.6.2, this is the 6.
4185 This value is manually set in patchlevel.h
4187 perladmin (perladmin.U):
4188 Electronic mail address of the perl5 administrator.
4191 The list of libraries needed by Perl only (any libraries needed
4192 by extensions only will by dropped, if using dynamic loading).
4194 perlpath (perlpath.U):
4195 This variable contains the eventual value of the PERLPATH symbol,
4196 which contains the name of the perl interpreter to be used in
4197 shell scripts and in the "eval 'exec'" idiom. This variable is
4198 not necessarily the pathname of the file containing the perl
4199 interpreter; you must append the executable extension (_exe) if
4200 it is not already present. Note that Perl code that runs during
4201 the Perl build process cannot reference this variable, as Perl
4202 may not have been installed, or even if installed, may be a
4203 different version of Perl.
4206 This variable is used internally by Configure to determine the
4207 full pathname (if any) of the pg program. After Configure runs,
4208 the value is reset to a plain "pg" and is not useful.
4210 phostname (myhostname.U):
4211 This variable contains the eventual value of the PHOSTNAME symbol,
4212 which is a command that can be fed to popen() to get the host name.
4213 The program should probably not presume that the domain is or isn't
4216 pidtype (pidtype.U):
4217 This variable defines PIDTYPE to be something like pid_t, int,
4218 ushort, or whatever type is used to declare process ids in the kernel.
4221 Holds the private path used by Configure to find out the libraries.
4222 Its value is prepend to libpth. This variable takes care of special
4223 machines, like the mips. Usually, it should be empty.
4226 This variable is defined but not used by Configure.
4227 The value is the empty string and is not useful.
4230 This variable is defined but not used by Configure.
4231 The value is the empty string and is not useful.
4234 This variable holds the name of the directory below which the
4235 user will install the package. Usually, this is /usr/local, and
4236 executables go in /usr/local/bin, library stuff in /usr/local/lib,
4237 man pages in /usr/local/man, etc. It is only used to set defaults
4238 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
4240 prefixexp (prefix.U):
4241 This variable holds the full absolute path of the directory below
4242 which the user will install the package. Derived from prefix.
4244 privlib (privlib.U):
4245 This variable contains the eventual value of the PRIVLIB symbol,
4246 which is the name of the private library for this package. It may
4247 have a ~ on the front. It is up to the makefile to eventually create
4248 this directory while performing installation (with ~ substitution).
4250 privlibexp (privlib.U):
4251 This variable is the ~name expanded version of privlib, so that you
4252 may use it directly in Makefiles or shell scripts.
4254 procselfexe (d_procselfexe.U):
4255 If d_procselfexe is defined, $procselfexe is the filename
4256 of the symbolic link pointing to the absolute pathname of
4257 the executing program.
4259 prototype (prototype.U):
4260 This variable holds the eventual value of CAN_PROTOTYPE, which
4261 indicates the C compiler can handle function prototypes.
4263 ptrsize (ptrsize.U):
4264 This variable contains the value of the PTRSIZE symbol, which
4265 indicates to the C program how many bytes there are in a pointer.
4267 quadkind (quadtype.U):
4268 This variable, if defined, encodes the type of a quad:
4269 1 = int, 2 = long, 3 = long long, 4 = int64_t.
4271 quadtype (quadtype.U):
4272 This variable defines Quad_t to be something like long, int,
4273 long long, int64_t, or whatever type is used for 64-bit integers.
4275 randbits (randfunc.U):
4276 Indicates how many bits are produced by the function used to
4277 generate normalized random numbers.
4279 randfunc (randfunc.U):
4280 Indicates the name of the random number function to use.
4281 Values include drand48, random, and rand. In C programs,
4282 the 'Drand01' macro is defined to generate uniformly distributed
4283 random numbers over the range [0., 1.[ (see drand01 and nrand).
4285 random_r_proto (d_random_r.U):
4286 This variable encodes the prototype of random_r.
4287 It is zero if d_random_r is undef, and one of the
4288 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
4291 randseedtype (randfunc.U):
4292 Indicates the type of the argument of the seedfunc.
4294 ranlib (orderlib.U):
4295 This variable is set to the pathname of the ranlib program, if it is
4296 needed to generate random libraries. Set to ":" if ar can generate
4297 random libraries or if random libraries are not supported
4299 rd_nodata (nblock_io.U):
4300 This variable holds the return code from read() when no data is
4301 present. It should be -1, but some systems return 0 when O_NDELAY is
4302 used, which is a shame because you cannot make the difference between
4303 no data and an EOF.. Sigh!
4305 readdir64_r_proto (d_readdir64_r.U):
4306 This variable encodes the prototype of readdir64_r.
4307 It is zero if d_readdir64_r is undef, and one of the
4308 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
4311 readdir_r_proto (d_readdir_r.U):
4312 This variable encodes the prototype of readdir_r.
4313 It is zero if d_readdir_r is undef, and one of the
4314 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
4317 revision (patchlevel.U):
4318 The value of revision comes from the patchlevel.h file.
4319 In a version number such as 5.6.1, this is the "5".
4320 In patchlevel.h, this is referred to as "PERL_REVISION".
4323 This variable is used internally by Configure to determine the
4324 full pathname (if any) of the rm program. After Configure runs,
4325 the value is reset to a plain "rm" and is not useful.
4328 This is a cleanup variable for try test programs.
4329 Internal Configure use only.
4332 This variable is defined but not used by Configure.
4333 The value is the empty string and is not useful.
4336 This variable contains the command used by Configure
4337 to copy and execute a cross-compiled executable in the
4338 target host. Useful and available only during Perl build.
4339 Empty string '' if not cross-compiling.
4342 This variable contains 'true' or 'false' depending whether the
4343 nm extraction should be performed or not, according to the value
4344 of usenm and the flags on the Configure command line.
4346 sched_yield (d_pthread_y.U):
4347 This variable defines the way to yield the execution
4348 of the current thread.
4350 scriptdir (scriptdir.U):
4351 This variable holds the name of the directory in which the user wants
4352 to put publicly scripts for the package in question. It is either
4353 the same directory as for binaries, or a special one that can be
4354 mounted across different architectures, like /usr/share. Programs
4355 must be prepared to deal with ~name expansion.
4357 scriptdirexp (scriptdir.U):
4358 This variable is the same as scriptdir, but is filename expanded
4359 at configuration time, for programs not wanting to bother with it.
4362 This variable is used internally by Configure to determine the
4363 full pathname (if any) of the sed program. After Configure runs,
4364 the value is reset to a plain "sed" and is not useful.
4366 seedfunc (randfunc.U):
4367 Indicates the random number generating seed function.
4368 Values include srand48, srandom, and srand.
4370 selectminbits (selectminbits.U):
4371 This variable holds the minimum number of bits operated by select.
4372 That is, if you do select(n, ...), how many bits at least will be
4373 cleared in the masks if some activity is detected. Usually this
4374 is either n or 32*ceil(n/32), especially many little-endians do
4375 the latter. This is only useful if you have select(), naturally.
4377 selecttype (selecttype.U):
4378 This variable holds the type used for the 2nd, 3rd, and 4th
4379 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
4380 is defined, and 'int *' otherwise. This is only useful if you
4381 have select(), naturally.
4384 This variable is defined but not used by Configure.
4385 The value is the empty string and is not useful.
4387 setgrent_r_proto (d_setgrent_r.U):
4388 This variable encodes the prototype of setgrent_r.
4389 It is zero if d_setgrent_r is undef, and one of the
4390 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r
4393 sethostent_r_proto (d_sethostent_r.U):
4394 This variable encodes the prototype of sethostent_r.
4395 It is zero if d_sethostent_r is undef, and one of the
4396 REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r
4399 setlocale_r_proto (d_setlocale_r.U):
4400 This variable encodes the prototype of setlocale_r.
4401 It is zero if d_setlocale_r is undef, and one of the
4402 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r
4405 setnetent_r_proto (d_setnetent_r.U):
4406 This variable encodes the prototype of setnetent_r.
4407 It is zero if d_setnetent_r is undef, and one of the
4408 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r
4411 setprotoent_r_proto (d_setprotoent_r.U):
4412 This variable encodes the prototype of setprotoent_r.
4413 It is zero if d_setprotoent_r is undef, and one of the
4414 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r
4417 setpwent_r_proto (d_setpwent_r.U):
4418 This variable encodes the prototype of setpwent_r.
4419 It is zero if d_setpwent_r is undef, and one of the
4420 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r
4423 setservent_r_proto (d_setservent_r.U):
4424 This variable encodes the prototype of setservent_r.
4425 It is zero if d_setservent_r is undef, and one of the
4426 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r
4429 sGMTIME_max (time_size.U):
4430 This variable defines the maximum value of the time_t offset that
4431 the system function gmtime () accepts
4433 sGMTIME_min (time_size.U):
4434 This variable defines the minimum value of the time_t offset that
4435 the system function gmtime () accepts
4438 This variable contains the full pathname of the shell used
4439 on this system to execute Bourne shell scripts. Usually, this will be
4440 /bin/sh, though it's possible that some systems will have /bin/ksh,
4441 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
4443 This unit comes before Options.U, so you can't set sh with a '-D'
4444 option, though you can override this (and startsh)
4445 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
4448 This variable is defined but not used by Configure.
4449 The value is the empty string and is not useful.
4451 sharpbang (spitshell.U):
4452 This variable contains the string #! if this system supports that
4455 shmattype (d_shmat.U):
4456 This symbol contains the type of pointer returned by shmat().
4457 It can be 'void *' or 'char *'.
4459 shortsize (intsize.U):
4460 This variable contains the value of the SHORTSIZE symbol which
4461 indicates to the C program how many bytes there are in a short.
4463 shrpenv (libperl.U):
4464 If the user builds a shared libperl.so, then we need to tell the
4465 'perl' executable where it will be able to find the installed libperl.so.
4466 One way to do this on some systems is to set the environment variable
4467 LD_RUN_PATH to the directory that will be the final location of the
4468 shared libperl.so. The makefile can use this with something like
4469 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
4471 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
4474 See the main perl Makefile.SH for actual working usage.
4475 Alternatively, we might be able to use a command line option such
4476 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
4477 $archlibexp/CORE (Linux).
4479 shsharp (spitshell.U):
4480 This variable tells further Configure units whether your sh can
4483 sig_count (sig_name.U):
4484 This variable holds a number larger than the largest valid
4485 signal number. This is usually the same as the NSIG macro.
4487 sig_name (sig_name.U):
4488 This variable holds the signal names, space separated. The leading
4489 SIG in signal name is removed. A ZERO is prepended to the list.
4490 This is currently not used, sig_name_init is used instead.
4492 sig_name_init (sig_name.U):
4493 This variable holds the signal names, enclosed in double quotes and
4494 separated by commas, suitable for use in the SIG_NAME definition
4495 below. A "ZERO" is prepended to the list, and the list is
4496 terminated with a plain 0. The leading SIG in signal names
4497 is removed. See sig_num.
4499 sig_num (sig_name.U):
4500 This variable holds the signal numbers, space separated. A ZERO is
4501 prepended to the list (corresponding to the fake SIGZERO).
4502 Those numbers correspond to the value of the signal listed
4503 in the same place within the sig_name list.
4504 This is currently not used, sig_num_init is used instead.
4506 sig_num_init (sig_name.U):
4507 This variable holds the signal numbers, enclosed in double quotes and
4508 separated by commas, suitable for use in the SIG_NUM definition
4509 below. A "ZERO" is prepended to the list, and the list is
4510 terminated with a plain 0.
4512 sig_size (sig_name.U):
4513 This variable contains the number of elements of the sig_name
4516 signal_t (d_voidsig.U):
4517 This variable holds the type of the signal handler (void or int).
4519 sitearch (sitearch.U):
4520 This variable contains the eventual value of the SITEARCH symbol,
4521 which is the name of the private library for this package. It may
4522 have a ~ on the front. It is up to the makefile to eventually create
4523 this directory while performing installation (with ~ substitution).
4524 The standard distribution will put nothing in this directory.
4525 After perl has been installed, users may install their own local
4526 architecture-dependent modules in this directory with
4527 MakeMaker Makefile.PL
4528 or equivalent. See INSTALL for details.
4530 sitearchexp (sitearch.U):
4531 This variable is the ~name expanded version of sitearch, so that you
4532 may use it directly in Makefiles or shell scripts.
4534 sitebin (sitebin.U):
4535 This variable holds the name of the directory in which the user wants
4536 to put add-on publicly executable files for the package in question. It
4537 is most often a local directory such as /usr/local/bin. Programs using
4538 this variable must be prepared to deal with ~name substitution.
4539 The standard distribution will put nothing in this directory.
4540 After perl has been installed, users may install their own local
4541 executables in this directory with
4542 MakeMaker Makefile.PL
4543 or equivalent. See INSTALL for details.
4545 sitebinexp (sitebin.U):
4546 This is the same as the sitebin variable, but is filename expanded at
4547 configuration time, for use in your makefiles.
4549 sitehtml1dir (sitehtml1dir.U):
4550 This variable contains the name of the directory in which site-specific
4551 html source pages are to be put. It is the responsibility of the
4552 Makefile.SH to get the value of this into the proper command.
4553 You must be prepared to do the ~name expansion yourself.
4554 The standard distribution will put nothing in this directory.
4555 After perl has been installed, users may install their own local
4556 html pages in this directory with
4557 MakeMaker Makefile.PL
4558 or equivalent. See INSTALL for details.
4560 sitehtml1direxp (sitehtml1dir.U):
4561 This variable is the same as the sitehtml1dir variable, but is filename
4562 expanded at configuration time, for convenient use in makefiles.
4564 sitehtml3dir (sitehtml3dir.U):
4565 This variable contains the name of the directory in which site-specific
4566 library html source pages are to be put. It is the responsibility of the
4567 Makefile.SH to get the value of this into the proper command.
4568 You must be prepared to do the ~name expansion yourself.
4569 The standard distribution will put nothing in this directory.
4570 After perl has been installed, users may install their own local
4571 library html pages in this directory with
4572 MakeMaker Makefile.PL
4573 or equivalent. See INSTALL for details.
4575 sitehtml3direxp (sitehtml3dir.U):
4576 This variable is the same as the sitehtml3dir variable, but is filename
4577 expanded at configuration time, for convenient use in makefiles.
4579 sitelib (sitelib.U):
4580 This variable contains the eventual value of the SITELIB symbol,
4581 which is the name of the private library for this package. It may
4582 have a ~ on the front. It is up to the makefile to eventually create
4583 this directory while performing installation (with ~ substitution).
4584 The standard distribution will put nothing in this directory.
4585 After perl has been installed, users may install their own local
4586 architecture-independent modules in this directory with
4587 MakeMaker Makefile.PL
4588 or equivalent. See INSTALL for details.
4590 sitelib_stem (sitelib.U):
4591 This variable is $sitelibexp with any trailing version-specific component
4592 removed. The elements in inc_version_list (inc_version_list.U) can
4593 be tacked onto this variable to generate a list of directories to search.
4595 sitelibexp (sitelib.U):
4596 This variable is the ~name expanded version of sitelib, so that you
4597 may use it directly in Makefiles or shell scripts.
4599 siteman1dir (siteman1dir.U):
4600 This variable contains the name of the directory in which site-specific
4601 manual source pages are to be put. It is the responsibility of the
4602 Makefile.SH to get the value of this into the proper command.
4603 You must be prepared to do the ~name expansion yourself.
4604 The standard distribution will put nothing in this directory.
4605 After perl has been installed, users may install their own local
4606 man1 pages in this directory with
4607 MakeMaker Makefile.PL
4608 or equivalent. See INSTALL for details.
4610 siteman1direxp (siteman1dir.U):
4611 This variable is the same as the siteman1dir variable, but is filename
4612 expanded at configuration time, for convenient use in makefiles.
4614 siteman3dir (siteman3dir.U):
4615 This variable contains the name of the directory in which site-specific
4616 library man source pages are to be put. It is the responsibility of the
4617 Makefile.SH to get the value of this into the proper command.
4618 You must be prepared to do the ~name expansion yourself.
4619 The standard distribution will put nothing in this directory.
4620 After perl has been installed, users may install their own local
4621 man3 pages in this directory with
4622 MakeMaker Makefile.PL
4623 or equivalent. See INSTALL for details.
4625 siteman3direxp (siteman3dir.U):
4626 This variable is the same as the siteman3dir variable, but is filename
4627 expanded at configuration time, for convenient use in makefiles.
4629 siteprefix (siteprefix.U):
4630 This variable holds the full absolute path of the directory below
4631 which the user will install add-on packages.
4632 See INSTALL for usage and examples.
4634 siteprefixexp (siteprefix.U):
4635 This variable holds the full absolute path of the directory below
4636 which the user will install add-on packages. Derived from siteprefix.
4638 sitescript (sitescript.U):
4639 This variable holds the name of the directory in which the user wants
4640 to put add-on publicly executable files for the package in question. It
4641 is most often a local directory such as /usr/local/bin. Programs using
4642 this variable must be prepared to deal with ~name substitution.
4643 The standard distribution will put nothing in this directory.
4644 After perl has been installed, users may install their own local
4645 scripts in this directory with
4646 MakeMaker Makefile.PL
4647 or equivalent. See INSTALL for details.
4649 sitescriptexp (sitescript.U):
4650 This is the same as the sitescript variable, but is filename expanded at
4651 configuration time, for use in your makefiles.
4653 sizesize (sizesize.U):
4654 This variable contains the size of a sizetype in bytes.
4656 sizetype (sizetype.U):
4657 This variable defines sizetype to be something like size_t,
4658 unsigned long, or whatever type is used to declare length
4659 parameters for string functions.
4662 This variable is defined but not used by Configure.
4663 The value is the empty string and is not useful.
4665 sLOCALTIME_max (time_size.U):
4666 This variable defines the maximum value of the time_t offset that
4667 the system function localtime () accepts
4669 sLOCALTIME_min (time_size.U):
4670 This variable defines the minimum value of the time_t offset that
4671 the system function localtime () accepts
4674 This variable is defined but not used by Configure.
4675 The value is the empty string and is not useful.
4678 This variable holds the extension used to identify shared libraries
4679 (also known as shared objects) on the system. Usually set to 'so'.
4681 sockethdr (d_socket.U):
4682 This variable has any cpp '-I' flags needed for socket support.
4684 socketlib (d_socket.U):
4685 This variable has the names of any libraries needed for socket support.
4687 socksizetype (socksizetype.U):
4688 This variable holds the type used for the size argument
4689 for various socket calls like accept. Usual values include
4690 socklen_t, size_t, and int.
4693 This variable is used internally by Configure to determine the
4694 full pathname (if any) of the sort program. After Configure runs,
4695 the value is reset to a plain "sort" and is not useful.
4697 spackage (package.U):
4698 This variable contains the name of the package being constructed,
4699 with the first letter uppercased, i.e. suitable for starting
4702 spitshell (spitshell.U):
4703 This variable contains the command necessary to spit out a runnable
4704 shell on this system. It is either cat or a grep '-v' for # comments.
4706 sPRId64 (quadfio.U):
4707 This variable, if defined, contains the string used by stdio to
4708 format 64-bit decimal numbers (format 'd') for output.
4710 sPRIeldbl (longdblfio.U):
4711 This variable, if defined, contains the string used by stdio to
4712 format long doubles (format 'e') for output.
4714 sPRIEUldbl (longdblfio.U):
4715 This variable, if defined, contains the string used by stdio to
4716 format long doubles (format 'E') for output.
4717 The 'U' in the name is to separate this from sPRIeldbl so that even
4718 case-blind systems can see the difference.
4720 sPRIfldbl (longdblfio.U):
4721 This variable, if defined, contains the string used by stdio to
4722 format long doubles (format 'f') for output.
4724 sPRIFUldbl (longdblfio.U):
4725 This variable, if defined, contains the string used by stdio to
4726 format long doubles (format 'F') for output.
4727 The 'U' in the name is to separate this from sPRIfldbl so that even
4728 case-blind systems can see the difference.
4730 sPRIgldbl (longdblfio.U):
4731 This variable, if defined, contains the string used by stdio to
4732 format long doubles (format 'g') for output.
4734 sPRIGUldbl (longdblfio.U):
4735 This variable, if defined, contains the string used by stdio to
4736 format long doubles (format 'G') for output.
4737 The 'U' in the name is to separate this from sPRIgldbl so that even
4738 case-blind systems can see the difference.
4740 sPRIi64 (quadfio.U):
4741 This variable, if defined, contains the string used by stdio to
4742 format 64-bit decimal numbers (format 'i') for output.
4744 sPRIo64 (quadfio.U):
4745 This variable, if defined, contains the string used by stdio to
4746 format 64-bit octal numbers (format 'o') for output.
4748 sPRIu64 (quadfio.U):
4749 This variable, if defined, contains the string used by stdio to
4750 format 64-bit unsigned decimal numbers (format 'u') for output.
4752 sPRIx64 (quadfio.U):
4753 This variable, if defined, contains the string used by stdio to
4754 format 64-bit hexadecimal numbers (format 'x') for output.
4756 sPRIXU64 (quadfio.U):
4757 This variable, if defined, contains the string used by stdio to
4758 format 64-bit hExADECimAl numbers (format 'X') for output.
4759 The 'U' in the name is to separate this from sPRIx64 so that even
4760 case-blind systems can see the difference.
4762 srand48_r_proto (d_srand48_r.U):
4763 This variable encodes the prototype of srand48_r.
4764 It is zero if d_srand48_r is undef, and one of the
4765 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srand48_r
4768 srandom_r_proto (d_srandom_r.U):
4769 This variable encodes the prototype of srandom_r.
4770 It is zero if d_srandom_r is undef, and one of the
4771 REENTRANT_PROTO_T_ABC macros of reentr.h if d_srandom_r
4775 This variable holds the (possibly relative) path of the package source.
4776 It is up to the Makefile to use this variable and set VPATH accordingly
4777 to find the sources remotely. Use $pkgsrc to have an absolute path.
4779 sSCNfldbl (longdblfio.U):
4780 This variable, if defined, contains the string used by stdio to
4781 format long doubles (format 'f') for input.
4783 ssizetype (ssizetype.U):
4784 This variable defines ssizetype to be something like ssize_t,
4785 long or int. It is used by functions that return a count
4786 of bytes or an error condition. It must be a signed type.
4787 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
4789 st_ino_sign (st_ino_def.U):
4790 This variable contains the signedness of struct stat's st_ino.
4791 1 for unsigned, -1 for signed.
4793 st_ino_size (st_ino_def.U):
4794 This variable contains the size of struct stat's st_ino in bytes.
4796 startperl (startperl.U):
4797 This variable contains the string to put on the front of a perl
4798 script to make sure (hopefully) that it runs with perl and not some
4799 shell. Of course, that leading line must be followed by the classical
4801 eval 'exec perl -S $0 ${1+"$@"}'
4802 if $running_under_some_shell;
4803 to guarantee perl startup should the shell execute the script. Note
4804 that this magic incantation is not understood by csh.
4806 startsh (startsh.U):
4807 This variable contains the string to put on the front of a shell
4808 script to make sure (hopefully) that it runs with sh and not some
4811 static_ext (Extensions.U):
4812 This variable holds a list of XS extension files we want to
4813 link statically into the package. It is used by Makefile.
4815 stdchar (stdchar.U):
4816 This variable conditionally defines STDCHAR to be the type of char
4817 used in stdio.h. It has the values "unsigned char" or "char".
4819 stdio_base (d_stdstdio.U):
4820 This variable defines how, given a FILE pointer, fp, to access the
4821 _base field (or equivalent) of stdio.h's FILE structure. This will
4822 be used to define the macro FILE_base(fp).
4824 stdio_bufsiz (d_stdstdio.U):
4825 This variable defines how, given a FILE pointer, fp, to determine
4826 the number of bytes store in the I/O buffer pointer to by the
4827 _base field (or equivalent) of stdio.h's FILE structure. This will
4828 be used to define the macro FILE_bufsiz(fp).
4830 stdio_cnt (d_stdstdio.U):
4831 This variable defines how, given a FILE pointer, fp, to access the
4832 _cnt field (or equivalent) of stdio.h's FILE structure. This will
4833 be used to define the macro FILE_cnt(fp).
4835 stdio_filbuf (d_stdstdio.U):
4836 This variable defines how, given a FILE pointer, fp, to tell
4837 stdio to refill its internal buffers (?). This will
4838 be used to define the macro FILE_filbuf(fp).
4840 stdio_ptr (d_stdstdio.U):
4841 This variable defines how, given a FILE pointer, fp, to access the
4842 _ptr field (or equivalent) of stdio.h's FILE structure. This will
4843 be used to define the macro FILE_ptr(fp).
4845 stdio_stream_array (stdio_streams.U):
4846 This variable tells the name of the array holding the stdio streams.
4847 Usual values include _iob, __iob, and __sF.
4849 strerror_r_proto (d_strerror_r.U):
4850 This variable encodes the prototype of strerror_r.
4851 It is zero if d_strerror_r is undef, and one of the
4852 REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r
4855 strings (i_string.U):
4856 This variable holds the full path of the string header that will be
4857 used. Typically /usr/include/string.h or /usr/include/strings.h.
4860 This variable is defined but not used by Configure.
4861 The value is the empty string and is not useful.
4863 subversion (patchlevel.U):
4864 The subversion level of this package.
4865 The value of subversion comes from the patchlevel.h file.
4866 In a version number such as 5.6.1, this is the "1".
4867 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
4868 This is unique to perl.
4871 This variable holds the place where the manual is located on this
4872 system. It is not the place where the user wants to put his manual
4873 pages. Rather it is the place where Configure may look to find manual
4874 for unix commands (section 1 of the manual usually). See mansrc.
4877 This variable is defined but not used by Configure.
4878 The value is the empty string and is not useful.
4881 This variable is defined but not used by Configure.
4882 The value is the empty string and is not useful.
4884 targetarch (Cross.U):
4885 If cross-compiling, this variable contains the target architecture.
4886 If not, this will be empty.
4889 This variable is defined but not used by Configure.
4890 The value is the empty string and is not useful.
4893 This variable is defined but not used by Configure.
4894 The value is the empty string and is not useful.
4897 This variable is used internally by Configure to determine the
4898 full pathname (if any) of the test program. After Configure runs,
4899 the value is reset to a plain "test" and is not useful.
4901 timeincl (i_time.U):
4902 This variable holds the full path of the included time header(s).
4904 timetype (d_time.U):
4905 This variable holds the type returned by time(). It can be long,
4906 or time_t on BSD sites (in which case <sys/types.h> should be
4907 included). Anyway, the type Time_t should be used.
4909 tmpnam_r_proto (d_tmpnam_r.U):
4910 This variable encodes the prototype of tmpnam_r.
4911 It is zero if d_tmpnam_r is undef, and one of the
4912 REENTRANT_PROTO_T_ABC macros of reentr.h if d_tmpnam_r
4916 This variable contains the command used by Configure
4917 to copy to from the target host. Useful and available
4918 only during Perl build.
4919 The string ':' if not cross-compiling.
4922 This variable is used internally by Configure to determine the
4923 full pathname (if any) of the touch program. After Configure runs,
4924 the value is reset to a plain "touch" and is not useful.
4927 This variable is used internally by Configure to determine the
4928 full pathname (if any) of the tr program. After Configure runs,
4929 the value is reset to a plain "tr" and is not useful.
4932 This variable contains the value to be passed to the tr(1)
4933 command to transliterate a newline. Typical values are
4934 '\012' and '\n'. This is needed for EBCDIC systems where
4935 newline is not necessarily '\012'.
4938 This variable is defined but not used by Configure.
4939 The value is the empty string and is not useful.
4941 ttyname_r_proto (d_ttyname_r.U):
4942 This variable encodes the prototype of ttyname_r.
4943 It is zero if d_ttyname_r is undef, and one of the
4944 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ttyname_r
4948 This variable is the size of an U16 in bytes.
4951 This variable contains the C type used for Perl's U16.
4954 This variable is the size of an U32 in bytes.
4957 This variable contains the C type used for Perl's U32.
4960 This variable is the size of an U64 in bytes.
4963 This variable contains the C type used for Perl's U64.
4966 This variable is the size of an U8 in bytes.
4969 This variable contains the C type used for Perl's U8.
4972 This variable contains the format string used for printing a Uid_t.
4974 uidsign (uidsign.U):
4975 This variable contains the signedness of a uidtype.
4976 1 for unsigned, -1 for signed.
4978 uidsize (uidsize.U):
4979 This variable contains the size of a uidtype in bytes.
4981 uidtype (uidtype.U):
4982 This variable defines Uid_t to be something like uid_t, int,
4983 ushort, or whatever type is used to declare user ids in the kernel.
4986 This variable is used internally by Configure to determine the
4987 full pathname (if any) of the uname program. After Configure runs,
4988 the value is reset to a plain "uname" and is not useful.
4991 This variable is used internally by Configure to determine the
4992 full pathname (if any) of the uniq program. After Configure runs,
4993 the value is reset to a plain "uniq" and is not useful.
4995 uquadtype (quadtype.U):
4996 This variable defines Uquad_t to be something like unsigned long,
4997 unsigned int, unsigned long long, uint64_t, or whatever type is
4998 used for 64-bit integers.
5000 use5005threads (usethreads.U):
5001 This variable conditionally defines the USE_5005THREADS symbol,
5002 and indicates that Perl should be built to use the 5.005-based
5003 threading implementation. Only valid up to 5.8.x.
5005 use64bitall (use64bits.U):
5006 This variable conditionally defines the USE_64_BIT_ALL symbol,
5007 and indicates that 64-bit integer types should be used
5008 when available. The maximal possible
5009 64-bitness is employed: LP64 or ILP64, meaning that you will
5010 be able to use more than 2 gigabytes of memory. This mode is
5011 even more binary incompatible than USE_64_BIT_INT. You may not
5012 be able to run the resulting executable in a 32-bit CPU at all or
5013 you may need at least to reboot your OS to 64-bit mode.
5015 use64bitint (use64bits.U):
5016 This variable conditionally defines the USE_64_BIT_INT symbol,
5017 and indicates that 64-bit integer types should be used
5018 when available. The minimal possible 64-bitness
5019 is employed, just enough to get 64-bit integers into Perl.
5020 This may mean using for example "long longs", while your memory
5021 may still be limited to 2 gigabytes.
5023 usecrosscompile (Cross.U):
5024 This variable conditionally defines the USE_CROSS_COMPILE symbol,
5025 and indicates that Perl has been cross-compiled.
5028 This variable indicates that Perl was configured with development
5029 features enabled. This should not be done for production builds.
5032 This variable indicates if the system supports dynamic
5033 loading of some sort. See also dlsrc and dlobj.
5035 usedtrace (usedtrace.U):
5036 This variable indicates whether we are compiling with dtrace
5037 support. See also dtrace.
5039 usefaststdio (usefaststdio.U):
5040 This variable conditionally defines the USE_FAST_STDIO symbol,
5041 and indicates that Perl should be built to use 'fast stdio'.
5042 Defaults to define in Perls 5.8 and earlier, to undef later.
5044 useithreads (usethreads.U):
5045 This variable conditionally defines the USE_ITHREADS symbol,
5046 and indicates that Perl should be built to use the interpreter-based
5047 threading implementation.
5049 usekernprocpathname (usekernprocpathname.U):
5050 This variable, indicates that we can use sysctl with
5051 KERN_PROC_PATHNAME to get a full path for the executable, and hence
5052 convert $^X to an absolute path.
5054 uselargefiles (uselfs.U):
5055 This variable conditionally defines the USE_LARGE_FILES symbol,
5056 and indicates that large file interfaces should be used when
5059 uselongdouble (uselongdbl.U):
5060 This variable conditionally defines the USE_LONG_DOUBLE symbol,
5061 and indicates that long doubles should be used when available.
5063 usemallocwrap (mallocsrc.U):
5064 This variable contains y if we are wrapping malloc to prevent
5065 integer overflow during size calculations.
5067 usemorebits (usemorebits.U):
5068 This variable conditionally defines the USE_MORE_BITS symbol,
5069 and indicates that explicit 64-bit interfaces and long doubles
5070 should be used when available.
5072 usemultiplicity (usemultiplicity.U):
5073 This variable conditionally defines the MULTIPLICITY symbol,
5074 and indicates that Perl should be built to use multiplicity.
5076 usemymalloc (mallocsrc.U):
5077 This variable contains y if the malloc that comes with this package
5078 is desired over the system's version of malloc. People often include
5079 special versions of malloc for efficiency, but such versions are often
5080 less portable. See also mallocsrc and mallocobj.
5081 If this is 'y', then -lmalloc is removed from $libs.
5084 This variable contains 'true' or 'false' depending whether the
5085 nm extraction is wanted or not.
5087 usensgetexecutablepath (usensgetexecutablepath.U):
5088 This symbol, if defined, indicates that we can use _NSGetExecutablePath
5089 and realpath to get a full path for the executable, and hence convert
5090 $^X to an absolute path.
5092 useopcode (Extensions.U):
5093 This variable holds either 'true' or 'false' to indicate
5094 whether the Opcode extension should be used. The sole
5095 use for this currently is to allow an easy mechanism
5096 for users to skip the Opcode extension from the Configure
5099 useperlio (useperlio.U):
5100 This variable conditionally defines the USE_PERLIO symbol,
5101 and indicates that the PerlIO abstraction should be
5104 useposix (Extensions.U):
5105 This variable holds either 'true' or 'false' to indicate
5106 whether the POSIX extension should be used. The sole
5107 use for this currently is to allow an easy mechanism
5108 for hints files to indicate that POSIX will not compile
5109 on a particular system.
5111 usereentrant (usethreads.U):
5112 This variable conditionally defines the USE_REENTRANT_API symbol,
5113 which indicates that the thread code may try to use the various
5114 _r versions of library functions. This is only potentially
5115 meaningful if usethreads is set and is very experimental, it is
5116 not even prompted for.
5118 userelocatableinc (bin.U):
5119 This variable is set to true to indicate that perl should relocate
5120 @INC entries at runtime based on the path to the perl binary.
5121 Any @INC paths starting ".../" are relocated relative to the directory
5122 containing the perl binary, and a logical cleanup of the path is then
5123 made around the join point (removing "dir/../" pairs)
5126 This variable is set to true when the user agrees to use sfio.
5127 It is set to false when sfio is not available or when the user
5128 explicitly requests not to use sfio. It is here primarily so
5129 that command-line settings can override the auto-detection of
5130 d_sfio without running into a "WHOA THERE".
5132 useshrplib (libperl.U):
5133 This variable is set to 'true' if the user wishes
5134 to build a shared libperl, and 'false' otherwise.
5136 usesitecustomize (d_sitecustomize.U):
5137 This variable is set to true when the user requires a mechanism that
5138 allows the sysadmin to add entries to @INC at runtime. This variable
5139 being set, makes perl run '$sitelib/sitecustomize.pl' at startup.
5141 usesocks (usesocks.U):
5142 This variable conditionally defines the USE_SOCKS symbol,
5143 and indicates that Perl should be built to use SOCKS.
5145 usethreads (usethreads.U):
5146 This variable conditionally defines the USE_THREADS symbol,
5147 and indicates that Perl should be built to use threads.
5149 usevendorprefix (vendorprefix.U):
5150 This variable tells whether the vendorprefix
5151 and consequently other vendor* paths are in use.
5153 useversionedarchname (archname.U):
5154 This variable indicates whether to include the $api_versionstring
5155 as a component of the $archname.
5157 usevfork (d_vfork.U):
5158 This variable is set to true when the user accepts to use vfork.
5159 It is set to false when no vfork is available or when the user
5160 explicitly requests not to use vfork.
5163 This variable holds the path of the include files, which is
5164 usually /usr/include. It is mainly used by other Configure units.
5167 This variable is defined but not used by Configure.
5168 The value is the empty string and is not useful.
5170 uvoformat (perlxvf.U):
5171 This variable contains the format string used for printing
5172 a Perl UV as an unsigned octal integer.
5175 This variable is the size of a UV in bytes.
5178 This variable contains the C type used for Perl's UV.
5180 uvuformat (perlxvf.U):
5181 This variable contains the format string used for printing
5182 a Perl UV as an unsigned decimal integer.
5184 uvxformat (perlxvf.U):
5185 This variable contains the format string used for printing
5186 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
5188 uvXUformat (perlxvf.U):
5189 This variable contains the format string used for printing
5190 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
5192 vaproto (vaproto.U):
5193 This variable conditionally defines CAN_VAPROTO on systems supporting
5194 prototype declaration of functions with a variable number of
5195 arguments. See also prototype.
5197 vendorarch (vendorarch.U):
5198 This variable contains the value of the PERL_VENDORARCH symbol.
5199 It may have a ~ on the front.
5200 The standard distribution will put nothing in this directory.
5201 Vendors who distribute perl may wish to place their own
5202 architecture-dependent modules and extensions in this directory with
5203 MakeMaker Makefile.PL INSTALLDIRS=vendor
5204 or equivalent. See INSTALL for details.
5206 vendorarchexp (vendorarch.U):
5207 This variable is the ~name expanded version of vendorarch, so that you
5208 may use it directly in Makefiles or shell scripts.
5210 vendorbin (vendorbin.U):
5211 This variable contains the eventual value of the VENDORBIN symbol.
5212 It may have a ~ on the front.
5213 The standard distribution will put nothing in this directory.
5214 Vendors who distribute perl may wish to place additional
5215 binaries in this directory with
5216 MakeMaker Makefile.PL INSTALLDIRS=vendor
5217 or equivalent. See INSTALL for details.
5219 vendorbinexp (vendorbin.U):
5220 This variable is the ~name expanded version of vendorbin, so that you
5221 may use it directly in Makefiles or shell scripts.
5223 vendorhtml1dir (vendorhtml1dir.U):
5224 This variable contains the name of the directory for html
5225 pages. It may have a ~ on the front.
5226 The standard distribution will put nothing in this directory.
5227 Vendors who distribute perl may wish to place their own
5228 html pages in this directory with
5229 MakeMaker Makefile.PL INSTALLDIRS=vendor
5230 or equivalent. See INSTALL for details.
5232 vendorhtml1direxp (vendorhtml1dir.U):
5233 This variable is the ~name expanded version of vendorhtml1dir, so that you
5234 may use it directly in Makefiles or shell scripts.
5236 vendorhtml3dir (vendorhtml3dir.U):
5237 This variable contains the name of the directory for html
5238 library pages. It may have a ~ on the front.
5239 The standard distribution will put nothing in this directory.
5240 Vendors who distribute perl may wish to place their own
5241 html pages for modules and extensions in this directory with
5242 MakeMaker Makefile.PL INSTALLDIRS=vendor
5243 or equivalent. See INSTALL for details.
5245 vendorhtml3direxp (vendorhtml3dir.U):
5246 This variable is the ~name expanded version of vendorhtml3dir, so that you
5247 may use it directly in Makefiles or shell scripts.
5249 vendorlib (vendorlib.U):
5250 This variable contains the eventual value of the VENDORLIB symbol,
5251 which is the name of the private library for this package.
5252 The standard distribution will put nothing in this directory.
5253 Vendors who distribute perl may wish to place their own
5254 modules in this directory with
5255 MakeMaker Makefile.PL INSTALLDIRS=vendor
5256 or equivalent. See INSTALL for details.
5258 vendorlib_stem (vendorlib.U):
5259 This variable is $vendorlibexp with any trailing version-specific component
5260 removed. The elements in inc_version_list (inc_version_list.U) can
5261 be tacked onto this variable to generate a list of directories to search.
5263 vendorlibexp (vendorlib.U):
5264 This variable is the ~name expanded version of vendorlib, so that you
5265 may use it directly in Makefiles or shell scripts.
5267 vendorman1dir (vendorman1dir.U):
5268 This variable contains the name of the directory for man1
5269 pages. It may have a ~ on the front.
5270 The standard distribution will put nothing in this directory.
5271 Vendors who distribute perl may wish to place their own
5272 man1 pages in this directory with
5273 MakeMaker Makefile.PL INSTALLDIRS=vendor
5274 or equivalent. See INSTALL for details.
5276 vendorman1direxp (vendorman1dir.U):
5277 This variable is the ~name expanded version of vendorman1dir, so that you
5278 may use it directly in Makefiles or shell scripts.
5280 vendorman3dir (vendorman3dir.U):
5281 This variable contains the name of the directory for man3
5282 pages. It may have a ~ on the front.
5283 The standard distribution will put nothing in this directory.
5284 Vendors who distribute perl may wish to place their own
5285 man3 pages in this directory with
5286 MakeMaker Makefile.PL INSTALLDIRS=vendor
5287 or equivalent. See INSTALL for details.
5289 vendorman3direxp (vendorman3dir.U):
5290 This variable is the ~name expanded version of vendorman3dir, so that you
5291 may use it directly in Makefiles or shell scripts.
5293 vendorprefix (vendorprefix.U):
5294 This variable holds the full absolute path of the directory below
5295 which the vendor will install add-on packages.
5296 See INSTALL for usage and examples.
5298 vendorprefixexp (vendorprefix.U):
5299 This variable holds the full absolute path of the directory below
5300 which the vendor will install add-on packages. Derived from vendorprefix.
5302 vendorscript (vendorscript.U):
5303 This variable contains the eventual value of the VENDORSCRIPT symbol.
5304 It may have a ~ on the front.
5305 The standard distribution will put nothing in this directory.
5306 Vendors who distribute perl may wish to place additional
5307 executable scripts in this directory with
5308 MakeMaker Makefile.PL INSTALLDIRS=vendor
5309 or equivalent. See INSTALL for details.
5311 vendorscriptexp (vendorscript.U):
5312 This variable is the ~name expanded version of vendorscript, so that you
5313 may use it directly in Makefiles or shell scripts.
5315 version (patchlevel.U):
5316 The full version number of this package, such as 5.6.1 (or 5_6_1).
5317 This combines revision, patchlevel, and subversion to get the
5318 full version number, including any possible subversions.
5319 This is suitable for use as a directory name, and hence is
5320 filesystem dependent.
5322 version_patchlevel_string (patchlevel.U):
5323 This is a string combining version, subversion and
5324 perl_patchlevel (if perl_patchlevel is non-zero).
5325 It is typically something like
5326 'version 7 subversion 1' or
5327 'version 7 subversion 1 patchlevel 11224'
5328 It is computed here to avoid duplication of code in myconfig.SH
5331 versiononly (versiononly.U):
5332 If set, this symbol indicates that only the version-specific
5333 components of a perl installation should be installed.
5334 This may be useful for making a test installation of a new
5335 version without disturbing the existing installation.
5336 Setting versiononly is equivalent to setting installperl's -v option.
5337 In particular, the non-versioned scripts and programs such as
5338 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
5339 (see INSTALL for a more complete list). Nor are the man
5341 Usually, this is undef.
5344 This variable is defined but not used by Configure.
5345 The value is the empty string and is not useful.
5347 voidflags (voidflags.U):
5348 This variable contains the eventual value of the VOIDFLAGS symbol,
5349 which indicates how much support of the void type is given by this
5350 compiler. See VOIDFLAGS for more info.
5353 This variable holds extra path (space-separated) used to find
5354 libraries on this platform, for example CPU-specific libraries
5355 (on multi-CPU platforms) may be listed here.
5358 This variable holds the name of the compiler compiler we
5359 want to use in the Makefile. It can be yacc, byacc, or bison -y.
5362 This variable contains any additional yacc flags desired by the
5363 user. It is up to the Makefile to use this.
5366 This variable is defined but not used by Configure.
5367 The value is the empty string and is not useful.
5370 This variable is used internally by Configure to determine the
5371 full pathname (if any) of the zip program. After Configure runs,
5372 the value is reset to a plain "zip" and is not useful.