1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
122 This variable is used internally by Configure to determine the
123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
127 The base revision level of this package, from the .package file.
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
139 bincompat5005 (bincompat5005.U):
140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
153 This variable is used internally by Configure to determine the
154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
157 byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
168 castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
187 cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
203 ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
214 ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
218 The list is a space-separated list of symbol=value tokens.
220 ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
229 cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
237 charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
246 This variable is used internally by Configure to determine the
247 full pathname (if any) of the chmod program. After Configure runs,
248 the value is reset to a plain "chmod" and is not useful.
251 This variable is defined but not used by Configure.
252 The value is a plain '' and is not useful.
254 clocktype (d_times.U):
255 This variable holds the type returned by times(). It can be long,
256 or clock_t on BSD sites (in which case <sys/types.h> should be
260 This variable is used internally by Configure to determine the
261 full pathname (if any) of the comm program. After Configure runs,
262 the value is reset to a plain "comm" and is not useful.
265 This variable is defined but not used by Configure.
266 The value is a plain '' and is not useful.
268 contains (contains.U):
269 This variable holds the command to do a grep with a proper return
270 status. On most sane systems it is simply "grep". On insane systems
271 it is a grep followed by a cat followed by a test. This variable
272 is primarily for the use of other Configure units.
275 This variable is used internally by Configure to determine the
276 full pathname (if any) of the cp program. After Configure runs,
277 the value is reset to a plain "cp" and is not useful.
280 This variable is defined but not used by Configure.
281 The value is a plain '' and is not useful.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the cpp program. After Configure runs,
286 the value is reset to a plain "cpp" and is not useful.
288 cpp_stuff (cpp_stuff.U):
289 This variable contains an identification of the catenation mechanism
290 used by the C preprocessor.
292 cppccsymbols (Cppsym.U):
293 The variable contains the symbols defined by the C compiler
294 when it calls cpp. The symbols defined by the cc alone or cpp
295 alone are not in this list, see ccsymbols and cppsymbols.
296 The list is a space-separated list of symbol=value tokens.
298 cppflags (ccflags.U):
299 This variable holds the flags that will be passed to the C pre-
300 processor. It is up to the Makefile to use it.
302 cpplast (cppstdin.U):
303 This variable has the same functionality as cppminus, only it applies
304 to cpprun and not cppstdin.
306 cppminus (cppstdin.U):
307 This variable contains the second part of the string which will invoke
308 the C preprocessor on the standard input and produce to standard
309 output. This variable will have the value "-" if cppstdin needs
310 a minus to specify standard input, otherwise the value is "".
313 This variable contains the command which will invoke a C preprocessor
314 on standard input and put the output to stdout. It is guaranteed not
315 to be a wrapper and may be a null string if no preprocessor can be
316 made directly available. This preprocessor might be different from the
317 one used by the C compiler. Don't forget to append cpplast after the
318 preprocessor options.
320 cppstdin (cppstdin.U):
321 This variable contains the command which will invoke the C
322 preprocessor on standard input and put the output to stdout.
323 It is primarily used by other Configure units that ask about
324 preprocessor symbols.
326 cppsymbols (Cppsym.U):
327 The variable contains the symbols defined by the C preprocessor
328 alone. The symbols defined by cc or by cc when it calls cpp are
329 not in this list, see ccsymbols and cppccsymbols.
330 The list is a space-separated list of symbol=value tokens.
332 cryptlib (d_crypt.U):
333 This variable holds -lcrypt or the path to a libcrypt.a archive if
334 the crypt() function is not defined in the standard C library. It is
335 up to the Makefile to use this.
338 This variable is used internally by Configure to determine the
339 full pathname (if any) of the csh program. After Configure runs,
340 the value is reset to a plain "csh" and is not useful.
342 d__fwalk (d__fwalk.U):
343 This variable conditionally defines HAS__FWALK if _fwalk() is
344 available to apply a function to all the file handles.
346 d_access (d_access.U):
347 This variable conditionally defines HAS_ACCESS if the access() system
348 call is available to check for access permissions using real IDs.
350 d_accessx (d_accessx.U):
351 This variable conditionally defines the HAS_ACCESSX symbol, which
352 indicates to the C program that the accessx() routine is available.
355 This variable conditionally defines the HAS_ALARM symbol, which
356 indicates to the C program that the alarm() routine is available.
358 d_archlib (archlib.U):
359 This variable conditionally defines ARCHLIB to hold the pathname
360 of architecture-dependent library files for $package. If
361 $archlib is the same as $privlib, then this is set to undef.
364 This variable conditionally defines the HAS_ATOLF symbol, which
365 indicates to the C program that the atolf() routine is available.
368 This variable conditionally defines the HAS_ATOLL symbol, which
369 indicates to the C program that the atoll() routine is available.
371 d_attribut (d_attribut.U):
372 This variable conditionally defines HASATTRIBUTE, which
373 indicates the C compiler can check for function attributes,
374 such as printf formats.
377 This variable conditionally defines the HAS_BCMP symbol if
378 the bcmp() routine is available to compare strings.
381 This variable conditionally defines the HAS_BCOPY symbol if
382 the bcopy() routine is available to copy strings.
384 d_bincompat5005 (bincompat5005.U):
385 This variable conditionally defines BINCOMPAT5005 so that embed.h
386 can take special action if this version of Perl should be
387 binary-compatible with Perl 5.005. This is impossible for builds
388 that use features like threads and multiplicity it is always $undef
392 This symbol conditionally defines the symbol BSD when running on a
395 d_bsdgetpgrp (d_getpgrp.U):
396 This variable conditionally defines USE_BSD_GETPGRP if
397 getpgrp needs one arguments whereas USG one needs none.
399 d_bsdsetpgrp (d_setpgrp.U):
400 This variable conditionally defines USE_BSD_SETPGRP if
401 setpgrp needs two arguments whereas USG one needs none.
402 See also d_setpgid for a POSIX interface.
405 This variable conditionally defines the HAS_BZERO symbol if
406 the bzero() routine is available to set memory to 0.
408 d_casti32 (d_casti32.U):
409 This variable conditionally defines CASTI32, which indicates
410 whether the C compiler can cast large floats to 32-bit ints.
412 d_castneg (d_castneg.U):
413 This variable conditionally defines CASTNEG, which indicates
414 wether the C compiler can cast negative float to unsigned.
416 d_charvspr (d_vprintf.U):
417 This variable conditionally defines CHARVSPRINTF if this system
418 has vsprintf returning type (char*). The trend seems to be to
419 declare it as "int vsprintf()".
422 This variable conditionally defines the HAS_CHOWN symbol, which
423 indicates to the C program that the chown() routine is available.
425 d_chroot (d_chroot.U):
426 This variable conditionally defines the HAS_CHROOT symbol, which
427 indicates to the C program that the chroot() routine is available.
429 d_chsize (d_chsize.U):
430 This variable conditionally defines the CHSIZE symbol, which
431 indicates to the C program that the chsize() routine is available
432 to truncate files. You might need a -lx to get this routine.
434 d_closedir (d_closedir.U):
435 This variable conditionally defines HAS_CLOSEDIR if closedir() is
438 d_cmsghdr_s (d_cmsghdr_s.U):
439 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
440 which indicates that the struct cmsghdr is supported.
443 This variable conditionally defines the HASCONST symbol, which
444 indicates to the C program that this C compiler knows about the
448 This variable conditionally defines the CRYPT symbol, which
449 indicates to the C program that the crypt() routine is available
450 to encrypt passwords and the like.
453 This variable conditionally defines the CSH symbol, which
454 indicates to the C program that the C-shell exists.
456 d_cuserid (d_cuserid.U):
457 This variable conditionally defines the HAS_CUSERID symbol, which
458 indicates to the C program that the cuserid() routine is available
459 to get character login names.
461 d_dbl_dig (d_dbl_dig.U):
462 This variable conditionally defines d_dbl_dig if this system's
463 header files provide DBL_DIG, which is the number of significant
464 digits in a double precision number.
466 d_dbminitproto (d_dbminitproto.U):
467 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
468 which indicates to the C program that the system provides
469 a prototype for the dbminit() function. Otherwise, it is
470 up to the program to supply one.
472 d_difftime (d_difftime.U):
473 This variable conditionally defines the HAS_DIFFTIME symbol, which
474 indicates to the C program that the difftime() routine is available.
476 d_dirnamlen (i_dirent.U):
477 This variable conditionally defines DIRNAMLEN, which indicates
478 to the C program that the length of directory entry names is
479 provided by a d_namelen field.
481 d_dlerror (d_dlerror.U):
482 This variable conditionally defines the HAS_DLERROR symbol, which
483 indicates to the C program that the dlerror() routine is available.
485 d_dlopen (d_dlopen.U):
486 This variable conditionally defines the HAS_DLOPEN symbol, which
487 indicates to the C program that the dlopen() routine is available.
489 d_dlsymun (d_dlsymun.U):
490 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
491 indicates that we need to prepend an underscore to the symbol
492 name before calling dlsym().
494 d_dosuid (d_dosuid.U):
495 This variable conditionally defines the symbol DOSUID, which
496 tells the C program that it should insert setuid emulation code
497 on hosts which have setuid #! scripts disabled.
499 d_drand48proto (d_drand48proto.U):
500 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
501 which indicates to the C program that the system provides
502 a prototype for the drand48() function. Otherwise, it is
503 up to the program to supply one.
506 This variable conditionally defines HAS_DUP2 if dup2() is
507 available to duplicate file descriptors.
509 d_eaccess (d_eaccess.U):
510 This variable conditionally defines the HAS_EACCESS symbol, which
511 indicates to the C program that the eaccess() routine is available.
513 d_endgrent (d_endgrent.U):
514 This variable conditionally defines the HAS_ENDGRENT symbol, which
515 indicates to the C program that the endgrent() routine is available
516 for sequential access of the group database.
518 d_endhent (d_endhent.U):
519 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
520 available to close whatever was being used for host queries.
522 d_endnent (d_endnent.U):
523 This variable conditionally defines HAS_ENDNETENT if endnetent() is
524 available to close whatever was being used for network queries.
526 d_endpent (d_endpent.U):
527 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
528 available to close whatever was being used for protocol queries.
530 d_endpwent (d_endpwent.U):
531 This variable conditionally defines the HAS_ENDPWENT symbol, which
532 indicates to the C program that the endpwent() routine is available
533 for sequential access of the passwd database.
535 d_endsent (d_endsent.U):
536 This variable conditionally defines HAS_ENDSERVENT if endservent() is
537 available to close whatever was being used for service queries.
539 d_eofnblk (nblock_io.U):
540 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
541 when reading from a non-blocking I/O source.
544 This variable conditionally defines the symbols EUNICE and VAX, which
545 alerts the C program that it must deal with ideosyncracies of VMS.
547 d_fchdir (d_fchdir.U):
548 This variable conditionally defines the HAS_FCHDIR symbol, which
549 indicates to the C program that the fchdir() routine is available.
551 d_fchmod (d_fchmod.U):
552 This variable conditionally defines the HAS_FCHMOD symbol, which
553 indicates to the C program that the fchmod() routine is available
554 to change mode of opened files.
556 d_fchown (d_fchown.U):
557 This variable conditionally defines the HAS_FCHOWN symbol, which
558 indicates to the C program that the fchown() routine is available
559 to change ownership of opened files.
562 This variable conditionally defines the HAS_FCNTL symbol, and indicates
563 whether the fcntl() function exists
565 d_fcntl_can_lock (d_fcntl_can_lock.U):
566 This variable conditionally defines the FCNTL_CAN_LOCK symbol
567 and indicates whether file locking with fcntl() works.
569 d_fd_macros (d_fd_set.U):
570 This variable contains the eventual value of the HAS_FD_MACROS symbol,
571 which indicates if your C compiler knows about the macros which
572 manipulate an fd_set.
574 d_fd_set (d_fd_set.U):
575 This variable contains the eventual value of the HAS_FD_SET symbol,
576 which indicates if your C compiler knows about the fd_set typedef.
578 d_fds_bits (d_fd_set.U):
579 This variable contains the eventual value of the HAS_FDS_BITS symbol,
580 which indicates if your fd_set typedef contains the fds_bits member.
581 If you have an fd_set typedef, but the dweebs who installed it did
582 a half-fast job and neglected to provide the macros to manipulate
583 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
585 d_fgetpos (d_fgetpos.U):
586 This variable conditionally defines HAS_FGETPOS if fgetpos() is
587 available to get the file position indicator.
589 d_flexfnam (d_flexfnam.U):
590 This variable conditionally defines the FLEXFILENAMES symbol, which
591 indicates that the system supports filenames longer than 14 characters.
594 This variable conditionally defines HAS_FLOCK if flock() is
595 available to do file locking.
597 d_flockproto (d_flockproto.U):
598 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
599 which indicates to the C program that the system provides
600 a prototype for the flock() function. Otherwise, it is
601 up to the program to supply one.
604 This variable conditionally defines the HAS_FORK symbol, which
605 indicates to the C program that the fork() routine is available.
607 d_fpathconf (d_pathconf.U):
608 This variable conditionally defines the HAS_FPATHCONF symbol, which
609 indicates to the C program that the pathconf() routine is available
610 to determine file-system related limits and options associated
611 with a given open file descriptor.
613 d_fpos64_t (d_fpos64_t.U):
614 This symbol will be defined if the C compiler supports fpos64_t.
616 d_frexpl (d_frexpl.U):
617 This variable conditionally defines the HAS_FREXPL symbol, which
618 indicates to the C program that the frexpl() routine is available.
620 d_fs_data_s (d_fs_data_s.U):
621 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
622 which indicates that the struct fs_data is supported.
624 d_fseeko (d_fseeko.U):
625 This variable conditionally defines the HAS_FSEEKO symbol, which
626 indicates to the C program that the fseeko() routine is available.
628 d_fsetpos (d_fsetpos.U):
629 This variable conditionally defines HAS_FSETPOS if fsetpos() is
630 available to set the file position indicator.
632 d_fstatfs (d_fstatfs.U):
633 This variable conditionally defines the HAS_FSTATFS symbol, which
634 indicates to the C program that the fstatfs() routine is available.
636 d_fstatvfs (d_statvfs.U):
637 This variable conditionally defines the HAS_FSTATVFS symbol, which
638 indicates to the C program that the fstatvfs() routine is available.
641 This variable conditionally defines the HAS_FSYNC symbol, which
642 indicates to the C program that the fsync() routine is available.
644 d_ftello (d_ftello.U):
645 This variable conditionally defines the HAS_FTELLO symbol, which
646 indicates to the C program that the ftello() routine is available.
649 This variable conditionally defines the HAS_FTIME symbol, which indicates
650 that the ftime() routine exists. The ftime() routine is basically
651 a sub-second accuracy clock.
653 d_Gconvert (d_gconvert.U):
654 This variable holds what Gconvert is defined as to convert
655 floating point numbers into strings. It could be 'gconvert'
656 or a more complex macro emulating gconvert with gcvt() or sprintf.
658 d_Gconvert='gconvert((x),(n),(t),(b))'
659 d_Gconvert='gcvt((x),(n),(b))'
660 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
662 d_getcwd (d_getcwd.U):
663 This variable conditionally defines the HAS_GETCWD symbol, which
664 indicates to the C program that the getcwd() routine is available
665 to get the current working directory.
667 d_getespwnam (d_getespwnam.U):
668 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
669 available to retrieve enchanced (shadow) password entries by name.
671 d_getfsstat (d_getfsstat.U):
672 This variable conditionally defines the HAS_GETFSSTAT symbol, which
673 indicates to the C program that the getfsstat() routine is available.
675 d_getgrent (d_getgrent.U):
676 This variable conditionally defines the HAS_GETGRENT symbol, which
677 indicates to the C program that the getgrent() routine is available
678 for sequential access of the group database.
680 d_getgrps (d_getgrps.U):
681 This variable conditionally defines the HAS_GETGROUPS symbol, which
682 indicates to the C program that the getgroups() routine is available
683 to get the list of process groups.
685 d_gethbyaddr (d_gethbyad.U):
686 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
687 indicates to the C program that the gethostbyaddr() routine is available
688 to look up hosts by their IP addresses.
690 d_gethbyname (d_gethbynm.U):
691 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
692 indicates to the C program that the gethostbyname() routine is available
693 to look up host names in some data base or other.
695 d_gethent (d_gethent.U):
696 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
697 available to look up host names in some data base or another.
699 d_gethname (d_gethname.U):
700 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
701 indicates to the C program that the gethostname() routine may be
702 used to derive the host name.
704 d_gethostprotos (d_gethostprotos.U):
705 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
706 which indicates to the C program that <netdb.h> supplies
707 prototypes for the various gethost*() functions.
708 See also netdbtype.U for probing for various netdb types.
710 d_getitimer (d_getitimer.U):
711 This variable conditionally defines the HAS_GETITIMER symbol, which
712 indicates to the C program that the getitimer() routine is available.
714 d_getlogin (d_getlogin.U):
715 This variable conditionally defines the HAS_GETLOGIN symbol, which
716 indicates to the C program that the getlogin() routine is available
717 to get the login name.
719 d_getmnt (d_getmnt.U):
720 This variable conditionally defines the HAS_GETMNT symbol, which
721 indicates to the C program that the getmnt() routine is available
722 to retrieve one or more mount info blocks by filename.
724 d_getmntent (d_getmntent.U):
725 This variable conditionally defines the HAS_GETMNTENT symbol, which
726 indicates to the C program that the getmntent() routine is available
727 to iterate through mounted files to get their mount info.
729 d_getnbyaddr (d_getnbyad.U):
730 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
731 indicates to the C program that the getnetbyaddr() routine is available
732 to look up networks by their IP addresses.
734 d_getnbyname (d_getnbynm.U):
735 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
736 indicates to the C program that the getnetbyname() routine is available
737 to look up networks by their names.
739 d_getnent (d_getnent.U):
740 This variable conditionally defines HAS_GETNETENT if getnetent() is
741 available to look up network names in some data base or another.
743 d_getnetprotos (d_getnetprotos.U):
744 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
745 which indicates to the C program that <netdb.h> supplies
746 prototypes for the various getnet*() functions.
747 See also netdbtype.U for probing for various netdb types.
749 d_getpagsz (d_getpagsz.U):
750 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
751 is available to get the system page size.
753 d_getpbyname (d_getprotby.U):
754 This variable conditionally defines the HAS_GETPROTOBYNAME
755 symbol, which indicates to the C program that the
756 getprotobyname() routine is available to look up protocols
759 d_getpbynumber (d_getprotby.U):
760 This variable conditionally defines the HAS_GETPROTOBYNUMBER
761 symbol, which indicates to the C program that the
762 getprotobynumber() routine is available to look up protocols
765 d_getpent (d_getpent.U):
766 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
767 available to look up protocols in some data base or another.
769 d_getpgid (d_getpgid.U):
770 This variable conditionally defines the HAS_GETPGID symbol, which
771 indicates to the C program that the getpgid(pid) function
772 is available to get the process group id.
774 d_getpgrp2 (d_getpgrp2.U):
775 This variable conditionally defines the HAS_GETPGRP2 symbol, which
776 indicates to the C program that the getpgrp2() (as in DG/UX) routine
777 is available to get the current process group.
779 d_getpgrp (d_getpgrp.U):
780 This variable conditionally defines HAS_GETPGRP if getpgrp() is
781 available to get the current process group.
783 d_getppid (d_getppid.U):
784 This variable conditionally defines the HAS_GETPPID symbol, which
785 indicates to the C program that the getppid() routine is available
786 to get the parent process ID.
788 d_getprior (d_getprior.U):
789 This variable conditionally defines HAS_GETPRIORITY if getpriority()
790 is available to get a process's priority.
792 d_getprotoprotos (d_getprotoprotos.U):
793 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
794 which indicates to the C program that <netdb.h> supplies
795 prototypes for the various getproto*() functions.
796 See also netdbtype.U for probing for various netdb types.
798 d_getprpwnam (d_getprpwnam.U):
799 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
800 available to retrieve protected (shadow) password entries by name.
802 d_getpwent (d_getpwent.U):
803 This variable conditionally defines the HAS_GETPWENT symbol, which
804 indicates to the C program that the getpwent() routine is available
805 for sequential access of the passwd database.
807 d_getsbyname (d_getsrvby.U):
808 This variable conditionally defines the HAS_GETSERVBYNAME
809 symbol, which indicates to the C program that the
810 getservbyname() routine is available to look up services
813 d_getsbyport (d_getsrvby.U):
814 This variable conditionally defines the HAS_GETSERVBYPORT
815 symbol, which indicates to the C program that the
816 getservbyport() routine is available to look up services
819 d_getsent (d_getsent.U):
820 This variable conditionally defines HAS_GETSERVENT if getservent() is
821 available to look up network services in some data base or another.
823 d_getservprotos (d_getservprotos.U):
824 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
825 which indicates to the C program that <netdb.h> supplies
826 prototypes for the various getserv*() functions.
827 See also netdbtype.U for probing for various netdb types.
829 d_getspnam (d_getspnam.U):
830 This variable conditionally defines HAS_GETSPNAM if getspnam() is
831 available to retrieve SysV shadow password entries by name.
833 d_gettimeod (d_ftime.U):
834 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
835 indicates that the gettimeofday() system call exists (to obtain a
836 sub-second accuracy clock). You should probably include <sys/resource.h>.
838 d_gnulibc (d_gnulibc.U):
839 Defined if we're dealing with the GNU C Library.
841 d_grpasswd (i_grp.U):
842 This variable conditionally defines GRPASSWD, which indicates
843 that struct group in <grp.h> contains gr_passwd.
845 d_hasmntopt (d_hasmntopt.U):
846 This variable conditionally defines the HAS_HASMNTOPT symbol, which
847 indicates to the C program that the hasmntopt() routine is available
848 to query the mount options of file systems.
851 This variable conditionally defines HAS_HTONL if htonl() and its
852 friends are available to do network order byte swapping.
855 This variable conditionally defines the HAS_ICONV symbol, which
856 indicates to the C program that the iconv() routine is available.
858 d_index (d_strchr.U):
859 This variable conditionally defines HAS_INDEX if index() and
860 rindex() are available for string searching.
862 d_inetaton (d_inetaton.U):
863 This variable conditionally defines the HAS_INET_ATON symbol, which
864 indicates to the C program that the inet_aton() function is available
865 to parse IP address "dotted-quad" strings.
867 d_int64_t (d_int64_t.U):
868 This symbol will be defined if the C compiler supports int64_t.
870 d_isascii (d_isascii.U):
871 This variable conditionally defines the HAS_ISASCII constant,
872 which indicates to the C program that isascii() is available.
875 This variable conditionally defines the HAS_ISNAN symbol, which
876 indicates to the C program that the isnan() routine is available.
878 d_isnanl (d_isnanl.U):
879 This variable conditionally defines the HAS_ISNANL symbol, which
880 indicates to the C program that the isnanl() routine is available.
882 d_killpg (d_killpg.U):
883 This variable conditionally defines the HAS_KILLPG symbol, which
884 indicates to the C program that the killpg() routine is available
885 to kill process groups.
887 d_lchown (d_lchown.U):
888 This variable conditionally defines the HAS_LCHOWN symbol, which
889 indicates to the C program that the lchown() routine is available
890 to operate on a symbolic link (instead of following the link).
892 d_ldbl_dig (d_ldbl_dig.U):
893 This variable conditionally defines d_ldbl_dig if this system's
894 header files provide LDBL_DIG, which is the number of significant
895 digits in a long double precision number.
898 This variable conditionally defines HAS_LINK if link() is
899 available to create hard links.
901 d_locconv (d_locconv.U):
902 This variable conditionally defines HAS_LOCALECONV if localeconv() is
903 available for numeric and monetary formatting conventions.
906 This variable conditionally defines HAS_LOCKF if lockf() is
907 available to do file locking.
909 d_longdbl (d_longdbl.U):
910 This variable conditionally defines HAS_LONG_DOUBLE if
911 the long double type is supported.
913 d_longlong (d_longlong.U):
914 This variable conditionally defines HAS_LONG_LONG if
915 the long long type is supported.
917 d_lseekproto (d_lseekproto.U):
918 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
919 which indicates to the C program that the system provides
920 a prototype for the lseek() function. Otherwise, it is
921 up to the program to supply one.
924 This variable conditionally defines HAS_LSTAT if lstat() is
925 available to do file stats on symbolic links.
927 d_madvise (d_madvise.U):
928 This variable conditionally defines HAS_MADVISE if madvise() is
929 available to map a file into memory.
932 This variable conditionally defines the HAS_MBLEN symbol, which
933 indicates to the C program that the mblen() routine is available
934 to find the number of bytes in a multibye character.
936 d_mbstowcs (d_mbstowcs.U):
937 This variable conditionally defines the HAS_MBSTOWCS symbol, which
938 indicates to the C program that the mbstowcs() routine is available
939 to convert a multibyte string into a wide character string.
941 d_mbtowc (d_mbtowc.U):
942 This variable conditionally defines the HAS_MBTOWC symbol, which
943 indicates to the C program that the mbtowc() routine is available
944 to convert multibyte to a wide character.
946 d_memchr (d_memchr.U):
947 This variable conditionally defines the HAS_MEMCHR symbol, which
948 indicates to the C program that the memchr() routine is available
949 to locate characters within a C string.
951 d_memcmp (d_memcmp.U):
952 This variable conditionally defines the HAS_MEMCMP symbol, which
953 indicates to the C program that the memcmp() routine is available
954 to compare blocks of memory.
956 d_memcpy (d_memcpy.U):
957 This variable conditionally defines the HAS_MEMCPY symbol, which
958 indicates to the C program that the memcpy() routine is available
959 to copy blocks of memory.
961 d_memmove (d_memmove.U):
962 This variable conditionally defines the HAS_MEMMOVE symbol, which
963 indicates to the C program that the memmove() routine is available
964 to copy potentatially overlapping blocks of memory.
966 d_memset (d_memset.U):
967 This variable conditionally defines the HAS_MEMSET symbol, which
968 indicates to the C program that the memset() routine is available
969 to set blocks of memory.
972 This variable conditionally defines the HAS_MKDIR symbol, which
973 indicates to the C program that the mkdir() routine is available
974 to create directories..
976 d_mkdtemp (d_mkdtemp.U):
977 This variable conditionally defines the HAS_MKDTEMP symbol, which
978 indicates to the C program that the mkdtemp() routine is available
979 to exclusively create a uniquely named temporary directory.
981 d_mkfifo (d_mkfifo.U):
982 This variable conditionally defines the HAS_MKFIFO symbol, which
983 indicates to the C program that the mkfifo() routine is available.
985 d_mkstemp (d_mkstemp.U):
986 This variable conditionally defines the HAS_MKSTEMP symbol, which
987 indicates to the C program that the mkstemp() routine is available
988 to exclusively create and open a uniquely named temporary file.
990 d_mkstemps (d_mkstemps.U):
991 This variable conditionally defines the HAS_MKSTEMPS symbol, which
992 indicates to the C program that the mkstemps() routine is available
993 to exclusively create and open a uniquely named (with a suffix)
996 d_mktime (d_mktime.U):
997 This variable conditionally defines the HAS_MKTIME symbol, which
998 indicates to the C program that the mktime() routine is available.
1001 This variable conditionally defines HAS_MMAP if mmap() is
1002 available to map a file into memory.
1004 d_modfl (d_modfl.U):
1005 This variable conditionally defines the HAS_MODFL symbol, which
1006 indicates to the C program that the modfl() routine is available.
1008 d_modfl_pow32_bug (d_modfl.U):
1009 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1010 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1011 For example from 4294967303.150000 one would get 4294967302.000000
1012 and 1.150000. The bug has been seen in certain versions of glibc,
1013 release 2.2.2 is known to be okay.
1015 d_mprotect (d_mprotect.U):
1016 This variable conditionally defines HAS_MPROTECT if mprotect() is
1017 available to modify the access protection of a memory mapped file.
1020 This variable conditionally defines the HAS_MSG symbol, which
1021 indicates that the entire msg*(2) library is present.
1023 d_msg_ctrunc (d_socket.U):
1024 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1025 which indicates that the MSG_CTRUNC is available. #ifdef is
1026 not enough because it may be an enum, glibc has been known to do this.
1028 d_msg_dontroute (d_socket.U):
1029 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1030 which indicates that the MSG_DONTROUTE is available. #ifdef is
1031 not enough because it may be an enum, glibc has been known to do this.
1033 d_msg_oob (d_socket.U):
1034 This variable conditionally defines the HAS_MSG_OOB symbol,
1035 which indicates that the MSG_OOB is available. #ifdef is
1036 not enough because it may be an enum, glibc has been known to do this.
1038 d_msg_peek (d_socket.U):
1039 This variable conditionally defines the HAS_MSG_PEEK symbol,
1040 which indicates that the MSG_PEEK is available. #ifdef is
1041 not enough because it may be an enum, glibc has been known to do this.
1043 d_msg_proxy (d_socket.U):
1044 This variable conditionally defines the HAS_MSG_PROXY symbol,
1045 which indicates that the MSG_PROXY is available. #ifdef is
1046 not enough because it may be an enum, glibc has been known to do this.
1048 d_msgctl (d_msgctl.U):
1049 This variable conditionally defines the HAS_MSGCTL symbol, which
1050 indicates to the C program that the msgctl() routine is available.
1052 d_msgget (d_msgget.U):
1053 This variable conditionally defines the HAS_MSGGET symbol, which
1054 indicates to the C program that the msgget() routine is available.
1056 d_msghdr_s (d_msghdr_s.U):
1057 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1058 which indicates that the struct msghdr is supported.
1060 d_msgrcv (d_msgrcv.U):
1061 This variable conditionally defines the HAS_MSGRCV symbol, which
1062 indicates to the C program that the msgrcv() routine is available.
1064 d_msgsnd (d_msgsnd.U):
1065 This variable conditionally defines the HAS_MSGSND symbol, which
1066 indicates to the C program that the msgsnd() routine is available.
1068 d_msync (d_msync.U):
1069 This variable conditionally defines HAS_MSYNC if msync() is
1070 available to synchronize a mapped file.
1072 d_munmap (d_munmap.U):
1073 This variable conditionally defines HAS_MUNMAP if munmap() is
1074 available to unmap a region mapped by mmap().
1076 d_mymalloc (mallocsrc.U):
1077 This variable conditionally defines MYMALLOC in case other parts
1078 of the source want to take special action if MYMALLOC is used.
1079 This may include different sorts of profiling or error detection.
1082 This variable conditionally defines the HAS_NICE symbol, which
1083 indicates to the C program that the nice() routine is available.
1085 d_nl_langinfo (d_nl_langinfo.U):
1086 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1087 indicates to the C program that the nl_langinfo() routine is available.
1089 d_nv_preserves_uv (perlxv.U):
1090 This variable indicates whether a variable of type nvtype
1091 can preserve all the bits a variable of type uvtype.
1093 d_nv_preserves_uv_bits (perlxv.U):
1094 This variable indicates how many of bits type uvtype
1095 a variable nvtype can preserve.
1097 d_off64_t (d_off64_t.U):
1098 This symbol will be defined if the C compiler supports off64_t.
1100 d_old_pthread_create_joinable (d_pthrattrj.U):
1101 This variable conditionally defines pthread_create_joinable.
1102 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1104 d_oldpthreads (usethreads.U):
1105 This variable conditionally defines the OLD_PTHREADS_API symbol,
1106 and indicates that Perl should be built to use the old
1107 draft POSIX threads API. This is only potentially meaningful if
1110 d_oldsock (d_socket.U):
1111 This variable conditionally defines the OLDSOCKET symbol, which
1112 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1114 d_open3 (d_open3.U):
1115 This variable conditionally defines the HAS_OPEN3 manifest constant,
1116 which indicates to the C program that the 3 argument version of
1117 the open(2) function is available.
1119 d_pathconf (d_pathconf.U):
1120 This variable conditionally defines the HAS_PATHCONF symbol, which
1121 indicates to the C program that the pathconf() routine is available
1122 to determine file-system related limits and options associated
1123 with a given filename.
1125 d_pause (d_pause.U):
1126 This variable conditionally defines the HAS_PAUSE symbol, which
1127 indicates to the C program that the pause() routine is available
1128 to suspend a process until a signal is received.
1130 d_perl_otherlibdirs (otherlibdirs.U):
1131 This variable conditionally defines PERL_OTHERLIBDIRS, which
1132 contains a colon-separated set of paths for the perl binary to
1133 include in @INC. See also otherlibdirs.
1135 d_phostname (d_gethname.U):
1136 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1137 contains the shell command which, when fed to popen(), may be
1138 used to derive the host name.
1141 This variable conditionally defines the HAS_PIPE symbol, which
1142 indicates to the C program that the pipe() routine is available
1143 to create an inter-process channel.
1146 This variable conditionally defines the HAS_POLL symbol, which
1147 indicates to the C program that the poll() routine is available
1148 to poll active file descriptors.
1150 d_portable (d_portable.U):
1151 This variable conditionally defines the PORTABLE symbol, which
1152 indicates to the C program that it should not assume that it is
1153 running on the machine it was compiled on.
1155 d_PRId64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRId64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1159 d_PRIeldbl (longdblfio.U):
1160 This variable conditionally defines the PERL_PRIfldbl symbol, which
1161 indiciates that stdio has a symbol to print long doubles.
1163 d_PRIEUldbl (longdblfio.U):
1164 This variable conditionally defines the PERL_PRIfldbl symbol, which
1165 indiciates that stdio has a symbol to print long doubles.
1166 The 'U' in the name is to separate this from d_PRIeldbl so that even
1167 case-blind systems can see the difference.
1169 d_PRIfldbl (longdblfio.U):
1170 This variable conditionally defines the PERL_PRIfldbl symbol, which
1171 indiciates that stdio has a symbol to print long doubles.
1173 d_PRIFUldbl (longdblfio.U):
1174 This variable conditionally defines the PERL_PRIfldbl symbol, which
1175 indiciates that stdio has a symbol to print long doubles.
1176 The 'U' in the name is to separate this from d_PRIfldbl so that even
1177 case-blind systems can see the difference.
1179 d_PRIgldbl (longdblfio.U):
1180 This variable conditionally defines the PERL_PRIfldbl symbol, which
1181 indiciates that stdio has a symbol to print long doubles.
1183 d_PRIGUldbl (longdblfio.U):
1184 This variable conditionally defines the PERL_PRIfldbl symbol, which
1185 indiciates that stdio has a symbol to print long doubles.
1186 The 'U' in the name is to separate this from d_PRIgldbl so that even
1187 case-blind systems can see the difference.
1189 d_PRIi64 (quadfio.U):
1190 This variable conditionally defines the PERL_PRIi64 symbol, which
1191 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1193 d_PRIo64 (quadfio.U):
1194 This variable conditionally defines the PERL_PRIo64 symbol, which
1195 indiciates that stdio has a symbol to print 64-bit octal numbers.
1197 d_PRIu64 (quadfio.U):
1198 This variable conditionally defines the PERL_PRIu64 symbol, which
1199 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1202 d_PRIx64 (quadfio.U):
1203 This variable conditionally defines the PERL_PRIx64 symbol, which
1204 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1206 d_PRIXU64 (quadfio.U):
1207 This variable conditionally defines the PERL_PRIXU64 symbol, which
1208 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1209 The 'U' in the name is to separate this from d_PRIx64 so that even
1210 case-blind systems can see the difference.
1212 d_pthread_atfork (d_pthread_atfork.U):
1213 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1214 which indicates to the C program that the pthread_atfork()
1215 routine is available.
1217 d_pthread_yield (d_pthread_y.U):
1218 This variable conditionally defines the HAS_PTHREAD_YIELD
1219 symbol if the pthread_yield routine is available to yield
1220 the execution of the current thread.
1223 This variable conditionally defines PWAGE, which indicates
1224 that struct passwd contains pw_age.
1226 d_pwchange (i_pwd.U):
1227 This variable conditionally defines PWCHANGE, which indicates
1228 that struct passwd contains pw_change.
1230 d_pwclass (i_pwd.U):
1231 This variable conditionally defines PWCLASS, which indicates
1232 that struct passwd contains pw_class.
1234 d_pwcomment (i_pwd.U):
1235 This variable conditionally defines PWCOMMENT, which indicates
1236 that struct passwd contains pw_comment.
1238 d_pwexpire (i_pwd.U):
1239 This variable conditionally defines PWEXPIRE, which indicates
1240 that struct passwd contains pw_expire.
1242 d_pwgecos (i_pwd.U):
1243 This variable conditionally defines PWGECOS, which indicates
1244 that struct passwd contains pw_gecos.
1246 d_pwpasswd (i_pwd.U):
1247 This variable conditionally defines PWPASSWD, which indicates
1248 that struct passwd contains pw_passwd.
1250 d_pwquota (i_pwd.U):
1251 This variable conditionally defines PWQUOTA, which indicates
1252 that struct passwd contains pw_quota.
1254 d_qgcvt (d_qgcvt.U):
1255 This variable conditionally defines the HAS_QGCVT symbol, which
1256 indicates to the C program that the qgcvt() routine is available.
1258 d_quad (quadtype.U):
1259 This variable, if defined, tells that there's a 64-bit integer type,
1262 d_readdir (d_readdir.U):
1263 This variable conditionally defines HAS_READDIR if readdir() is
1264 available to read directory entries.
1266 d_readlink (d_readlink.U):
1267 This variable conditionally defines the HAS_READLINK symbol, which
1268 indicates to the C program that the readlink() routine is available
1269 to read the value of a symbolic link.
1271 d_readv (d_readv.U):
1272 This variable conditionally defines the HAS_READV symbol, which
1273 indicates to the C program that the readv() routine is available.
1275 d_recvmsg (d_recvmsg.U):
1276 This variable conditionally defines the HAS_RECVMSG symbol, which
1277 indicates to the C program that the recvmsg() routine is available.
1279 d_rename (d_rename.U):
1280 This variable conditionally defines the HAS_RENAME symbol, which
1281 indicates to the C program that the rename() routine is available
1284 d_rewinddir (d_readdir.U):
1285 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1288 d_rmdir (d_rmdir.U):
1289 This variable conditionally defines HAS_RMDIR if rmdir() is
1290 available to remove directories.
1292 d_safebcpy (d_safebcpy.U):
1293 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1294 the bcopy() routine can do overlapping copies. Normally, you
1295 should probably use memmove().
1297 d_safemcpy (d_safemcpy.U):
1298 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1299 the memcpy() routine can do overlapping copies.
1300 For overlapping copies, memmove() should be used, if available.
1302 d_sanemcmp (d_sanemcmp.U):
1303 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1304 the memcpy() routine is available and can be used to compare relative
1305 magnitudes of chars with their high bits set.
1307 d_sbrkproto (d_sbrkproto.U):
1308 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1309 which indicates to the C program that the system provides
1310 a prototype for the sbrk() function. Otherwise, it is
1311 up to the program to supply one.
1313 d_sched_yield (d_pthread_y.U):
1314 This variable conditionally defines the HAS_SCHED_YIELD
1315 symbol if the sched_yield routine is available to yield
1316 the execution of the current thread.
1318 d_scm_rights (d_socket.U):
1319 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1320 which indicates that the SCM_RIGHTS is available. #ifdef is
1321 not enough because it may be an enum, glibc has been known to do this.
1323 d_SCNfldbl (longdblfio.U):
1324 This variable conditionally defines the PERL_PRIfldbl symbol, which
1325 indiciates that stdio has a symbol to scan long doubles.
1327 d_seekdir (d_readdir.U):
1328 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1331 d_select (d_select.U):
1332 This variable conditionally defines HAS_SELECT if select() is
1333 available to select active file descriptors. A <sys/time.h>
1334 inclusion may be necessary for the timeout field.
1337 This variable conditionally defines the HAS_SEM symbol, which
1338 indicates that the entire sem*(2) library is present.
1340 d_semctl (d_semctl.U):
1341 This variable conditionally defines the HAS_SEMCTL symbol, which
1342 indicates to the C program that the semctl() routine is available.
1344 d_semctl_semid_ds (d_union_semun.U):
1345 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1346 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1348 d_semctl_semun (d_union_semun.U):
1349 This variable conditionally defines USE_SEMCTL_SEMUN, which
1350 indicates that union semun is to be used for semctl IPC_STAT.
1352 d_semget (d_semget.U):
1353 This variable conditionally defines the HAS_SEMGET symbol, which
1354 indicates to the C program that the semget() routine is available.
1356 d_semop (d_semop.U):
1357 This variable conditionally defines the HAS_SEMOP symbol, which
1358 indicates to the C program that the semop() routine is available.
1360 d_sendmsg (d_sendmsg.U):
1361 This variable conditionally defines the HAS_SENDMSG symbol, which
1362 indicates to the C program that the sendmsg() routine is available.
1364 d_setegid (d_setegid.U):
1365 This variable conditionally defines the HAS_SETEGID symbol, which
1366 indicates to the C program that the setegid() routine is available
1367 to change the effective gid of the current program.
1369 d_seteuid (d_seteuid.U):
1370 This variable conditionally defines the HAS_SETEUID symbol, which
1371 indicates to the C program that the seteuid() routine is available
1372 to change the effective uid of the current program.
1374 d_setgrent (d_setgrent.U):
1375 This variable conditionally defines the HAS_SETGRENT symbol, which
1376 indicates to the C program that the setgrent() routine is available
1377 for initializing sequential access to the group database.
1379 d_setgrps (d_setgrps.U):
1380 This variable conditionally defines the HAS_SETGROUPS symbol, which
1381 indicates to the C program that the setgroups() routine is available
1382 to set the list of process groups.
1384 d_sethent (d_sethent.U):
1385 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1388 d_setitimer (d_setitimer.U):
1389 This variable conditionally defines the HAS_SETITIMER symbol, which
1390 indicates to the C program that the setitimer() routine is available.
1392 d_setlinebuf (d_setlnbuf.U):
1393 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1394 indicates to the C program that the setlinebuf() routine is available
1395 to change stderr or stdout from block-buffered or unbuffered to a
1398 d_setlocale (d_setlocale.U):
1399 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1400 available to handle locale-specific ctype implementations.
1402 d_setnent (d_setnent.U):
1403 This variable conditionally defines HAS_SETNETENT if setnetent() is
1406 d_setpent (d_setpent.U):
1407 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1410 d_setpgid (d_setpgid.U):
1411 This variable conditionally defines the HAS_SETPGID symbol if the
1412 setpgid(pid, gpid) function is available to set process group ID.
1414 d_setpgrp2 (d_setpgrp2.U):
1415 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1416 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1417 is available to set the current process group.
1419 d_setpgrp (d_setpgrp.U):
1420 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1421 available to set the current process group.
1423 d_setprior (d_setprior.U):
1424 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1425 is available to set a process's priority.
1427 d_setproctitle (d_setproctitle.U):
1428 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1429 which indicates to the C program that the setproctitle() routine
1432 d_setpwent (d_setpwent.U):
1433 This variable conditionally defines the HAS_SETPWENT symbol, which
1434 indicates to the C program that the setpwent() routine is available
1435 for initializing sequential access to the passwd database.
1437 d_setregid (d_setregid.U):
1438 This variable conditionally defines HAS_SETREGID if setregid() is
1439 available to change the real and effective gid of the current
1442 d_setresgid (d_setregid.U):
1443 This variable conditionally defines HAS_SETRESGID if setresgid() is
1444 available to change the real, effective and saved gid of the current
1447 d_setresuid (d_setreuid.U):
1448 This variable conditionally defines HAS_SETREUID if setresuid() is
1449 available to change the real, effective and saved uid of the current
1452 d_setreuid (d_setreuid.U):
1453 This variable conditionally defines HAS_SETREUID if setreuid() is
1454 available to change the real and effective uid of the current
1457 d_setrgid (d_setrgid.U):
1458 This variable conditionally defines the HAS_SETRGID symbol, which
1459 indicates to the C program that the setrgid() routine is available
1460 to change the real gid of the current program.
1462 d_setruid (d_setruid.U):
1463 This variable conditionally defines the HAS_SETRUID symbol, which
1464 indicates to the C program that the setruid() routine is available
1465 to change the real uid of the current program.
1467 d_setsent (d_setsent.U):
1468 This variable conditionally defines HAS_SETSERVENT if setservent() is
1471 d_setsid (d_setsid.U):
1472 This variable conditionally defines HAS_SETSID if setsid() is
1473 available to set the process group ID.
1475 d_setvbuf (d_setvbuf.U):
1476 This variable conditionally defines the HAS_SETVBUF symbol, which
1477 indicates to the C program that the setvbuf() routine is available
1478 to change buffering on an open stdio stream.
1481 This variable conditionally defines the USE_SFIO symbol,
1482 and indicates whether sfio is available (and should be used).
1485 This variable conditionally defines the HAS_SHM symbol, which
1486 indicates that the entire shm*(2) library is present.
1488 d_shmat (d_shmat.U):
1489 This variable conditionally defines the HAS_SHMAT symbol, which
1490 indicates to the C program that the shmat() routine is available.
1492 d_shmatprototype (d_shmat.U):
1493 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1494 symbol, which indicates that sys/shm.h has a prototype for
1497 d_shmctl (d_shmctl.U):
1498 This variable conditionally defines the HAS_SHMCTL symbol, which
1499 indicates to the C program that the shmctl() routine is available.
1501 d_shmdt (d_shmdt.U):
1502 This variable conditionally defines the HAS_SHMDT symbol, which
1503 indicates to the C program that the shmdt() routine is available.
1505 d_shmget (d_shmget.U):
1506 This variable conditionally defines the HAS_SHMGET symbol, which
1507 indicates to the C program that the shmget() routine is available.
1509 d_sigaction (d_sigaction.U):
1510 This variable conditionally defines the HAS_SIGACTION symbol, which
1511 indicates that the Vr4 sigaction() routine is available.
1513 d_sigprocmask (d_sigprocmask.U):
1514 This variable conditionally defines HAS_SIGPROCMASK
1515 if sigprocmask() is available to examine or change the signal mask
1516 of the calling process.
1518 d_sigsetjmp (d_sigsetjmp.U):
1519 This variable conditionally defines the HAS_SIGSETJMP symbol,
1520 which indicates that the sigsetjmp() routine is available to
1521 call setjmp() and optionally save the process's signal mask.
1523 d_sockatmark (d_sockatmark.U):
1524 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1525 indicates to the C program that the sockatmark() routine is available.
1527 d_sockatmarkproto (d_sockatmarkproto.U):
1528 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1529 which indicates to the C program that the system provides
1530 a prototype for the sockatmark() function. Otherwise, it is
1531 up to the program to supply one.
1533 d_socket (d_socket.U):
1534 This variable conditionally defines HAS_SOCKET, which indicates
1535 that the BSD socket interface is supported.
1537 d_socklen_t (d_socklen_t.U):
1538 This symbol will be defined if the C compiler supports socklen_t.
1540 d_sockpair (d_socket.U):
1541 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1542 indicates that the BSD socketpair() is supported.
1544 d_socks5_init (d_socks5_init.U):
1545 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1546 indicates to the C program that the socks5_init() routine is available.
1548 d_sqrtl (d_sqrtl.U):
1549 This variable conditionally defines the HAS_SQRTL symbol, which
1550 indicates to the C program that the sqrtl() routine is available.
1552 d_sresgproto (d_sresgproto.U):
1553 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1554 which indicates to the C program that the system provides
1555 a prototype for the setresgid() function. Otherwise, it is
1556 up to the program to supply one.
1558 d_sresuproto (d_sresuproto.U):
1559 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1560 which indicates to the C program that the system provides
1561 a prototype for the setresuid() function. Otherwise, it is
1562 up to the program to supply one.
1564 d_statblks (d_statblks.U):
1565 This variable conditionally defines USE_STAT_BLOCKS
1566 if this system has a stat structure declaring
1567 st_blksize and st_blocks.
1569 d_statfs_f_flags (d_statfs_f_flags.U):
1570 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1571 symbol, which indicates to struct statfs from has f_flags member.
1572 This kind of struct statfs is coming from sys/mount.h (BSD),
1573 not from sys/statfs.h (SYSV).
1575 d_statfs_s (d_statfs_s.U):
1576 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1577 which indicates that the struct statfs is supported.
1579 d_statvfs (d_statvfs.U):
1580 This variable conditionally defines the HAS_STATVFS symbol, which
1581 indicates to the C program that the statvfs() routine is available.
1583 d_stdio_cnt_lval (d_stdstdio.U):
1584 This variable conditionally defines STDIO_CNT_LVALUE if the
1585 FILE_cnt macro can be used as an lvalue.
1587 d_stdio_ptr_lval (d_stdstdio.U):
1588 This variable conditionally defines STDIO_PTR_LVALUE if the
1589 FILE_ptr macro can be used as an lvalue.
1591 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1592 This symbol is defined if using the FILE_ptr macro as an lvalue
1593 to increase the pointer by n leaves File_cnt(fp) unchanged.
1595 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1596 This symbol is defined if using the FILE_ptr macro as an lvalue
1597 to increase the pointer by n has the side effect of decreasing the
1598 value of File_cnt(fp) by n.
1600 d_stdio_stream_array (stdio_streams.U):
1601 This variable tells whether there is an array holding
1604 d_stdiobase (d_stdstdio.U):
1605 This variable conditionally defines USE_STDIO_BASE if this system
1606 has a FILE structure declaring a usable _base field (or equivalent)
1609 d_stdstdio (d_stdstdio.U):
1610 This variable conditionally defines USE_STDIO_PTR if this system
1611 has a FILE structure declaring usable _ptr and _cnt fields (or
1612 equivalent) in stdio.h.
1614 d_strchr (d_strchr.U):
1615 This variable conditionally defines HAS_STRCHR if strchr() and
1616 strrchr() are available for string searching.
1618 d_strcoll (d_strcoll.U):
1619 This variable conditionally defines HAS_STRCOLL if strcoll() is
1620 available to compare strings using collating information.
1622 d_strctcpy (d_strctcpy.U):
1623 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1624 indicates to the C program that this C compiler knows how to copy
1627 d_strerrm (d_strerror.U):
1628 This variable holds what Strerrr is defined as to translate an error
1629 code condition into an error message string. It could be 'strerror'
1630 or a more complex macro emulating strrror with sys_errlist[], or the
1631 "unknown" string when both strerror and sys_errlist are missing.
1633 d_strerror (d_strerror.U):
1634 This variable conditionally defines HAS_STRERROR if strerror() is
1635 available to translate error numbers to strings.
1637 d_strftime (d_strftime.U):
1638 This variable conditionally defines the HAS_STRFTIME symbol, which
1639 indicates to the C program that the strftime() routine is available.
1641 d_strtod (d_strtod.U):
1642 This variable conditionally defines the HAS_STRTOD symbol, which
1643 indicates to the C program that the strtod() routine is available
1644 to provide better numeric string conversion than atof().
1646 d_strtol (d_strtol.U):
1647 This variable conditionally defines the HAS_STRTOL symbol, which
1648 indicates to the C program that the strtol() routine is available
1649 to provide better numeric string conversion than atoi() and friends.
1651 d_strtold (d_strtold.U):
1652 This variable conditionally defines the HAS_STRTOLD symbol, which
1653 indicates to the C program that the strtold() routine is available.
1655 d_strtoll (d_strtoll.U):
1656 This variable conditionally defines the HAS_STRTOLL symbol, which
1657 indicates to the C program that the strtoll() routine is available.
1659 d_strtoq (d_strtoq.U):
1660 This variable conditionally defines the HAS_STRTOQ symbol, which
1661 indicates to the C program that the strtoq() routine is available.
1663 d_strtoul (d_strtoul.U):
1664 This variable conditionally defines the HAS_STRTOUL symbol, which
1665 indicates to the C program that the strtoul() routine is available
1666 to provide conversion of strings to unsigned long.
1668 d_strtoull (d_strtoull.U):
1669 This variable conditionally defines the HAS_STRTOULL symbol, which
1670 indicates to the C program that the strtoull() routine is available.
1672 d_strtouq (d_strtouq.U):
1673 This variable conditionally defines the HAS_STRTOUQ symbol, which
1674 indicates to the C program that the strtouq() routine is available.
1676 d_strxfrm (d_strxfrm.U):
1677 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1678 available to transform strings.
1680 d_suidsafe (d_dosuid.U):
1681 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1682 if setuid scripts can be secure. This test looks in /dev/fd/.
1684 d_symlink (d_symlink.U):
1685 This variable conditionally defines the HAS_SYMLINK symbol, which
1686 indicates to the C program that the symlink() routine is available
1687 to create symbolic links.
1689 d_syscall (d_syscall.U):
1690 This variable conditionally defines HAS_SYSCALL if syscall() is
1691 available call arbitrary system calls.
1693 d_syscallproto (d_syscallproto.U):
1694 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1695 which indicates to the C program that the system provides
1696 a prototype for the syscall() function. Otherwise, it is
1697 up to the program to supply one.
1699 d_sysconf (d_sysconf.U):
1700 This variable conditionally defines the HAS_SYSCONF symbol, which
1701 indicates to the C program that the sysconf() routine is available
1702 to determine system related limits and options.
1704 d_sysernlst (d_strerror.U):
1705 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1706 is available to translate error numbers to the symbolic name.
1708 d_syserrlst (d_strerror.U):
1709 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1710 available to translate error numbers to strings.
1712 d_system (d_system.U):
1713 This variable conditionally defines HAS_SYSTEM if system() is
1714 available to issue a shell command.
1716 d_tcgetpgrp (d_tcgtpgrp.U):
1717 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1718 indicates to the C program that the tcgetpgrp() routine is available.
1719 to get foreground process group ID.
1721 d_tcsetpgrp (d_tcstpgrp.U):
1722 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1723 indicates to the C program that the tcsetpgrp() routine is available
1724 to set foreground process group ID.
1726 d_telldir (d_readdir.U):
1727 This variable conditionally defines HAS_TELLDIR if telldir() is
1730 d_telldirproto (d_telldirproto.U):
1731 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1732 which indicates to the C program that the system provides
1733 a prototype for the telldir() function. Otherwise, it is
1734 up to the program to supply one.
1737 This variable conditionally defines the HAS_TIME symbol, which indicates
1738 that the time() routine exists. The time() routine is normaly
1739 provided on UNIX systems.
1741 d_times (d_times.U):
1742 This variable conditionally defines the HAS_TIMES symbol, which indicates
1743 that the times() routine exists. The times() routine is normaly
1744 provided on UNIX systems. You may have to include <sys/times.h>.
1746 d_truncate (d_truncate.U):
1747 This variable conditionally defines HAS_TRUNCATE if truncate() is
1748 available to truncate files.
1750 d_tzname (d_tzname.U):
1751 This variable conditionally defines HAS_TZNAME if tzname[] is
1752 available to access timezone names.
1754 d_u32align (d_u32align.U):
1755 This variable tells whether you must access character data
1756 through U32-aligned pointers.
1758 d_ualarm (d_ualarm.U):
1759 This variable conditionally defines the HAS_UALARM symbol, which
1760 indicates to the C program that the ualarm() routine is available.
1762 d_umask (d_umask.U):
1763 This variable conditionally defines the HAS_UMASK symbol, which
1764 indicates to the C program that the umask() routine is available.
1765 to set and get the value of the file creation mask.
1767 d_uname (d_gethname.U):
1768 This variable conditionally defines the HAS_UNAME symbol, which
1769 indicates to the C program that the uname() routine may be
1770 used to derive the host name.
1772 d_union_semun (d_union_semun.U):
1773 This variable conditionally defines HAS_UNION_SEMUN if the
1774 union semun is defined by including <sys/sem.h>.
1776 d_usleep (d_usleep.U):
1777 This variable conditionally defines HAS_USLEEP if usleep() is
1778 available to do high granularity sleeps.
1780 d_usleepproto (d_usleepproto.U):
1781 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1782 which indicates to the C program that the system provides
1783 a prototype for the usleep() function. Otherwise, it is
1784 up to the program to supply one.
1786 d_ustat (d_ustat.U):
1787 This variable conditionally defines HAS_USTAT if ustat() is
1788 available to query file system statistics by dev_t.
1790 d_vendorarch (vendorarch.U):
1791 This variable conditionally defined PERL_VENDORARCH.
1793 d_vendorbin (vendorbin.U):
1794 This variable conditionally defines PERL_VENDORBIN.
1796 d_vendorlib (vendorlib.U):
1797 This variable conditionally defines PERL_VENDORLIB.
1799 d_vfork (d_vfork.U):
1800 This variable conditionally defines the HAS_VFORK symbol, which
1801 indicates the vfork() routine is available.
1803 d_void_closedir (d_closedir.U):
1804 This variable conditionally defines VOID_CLOSEDIR if closedir()
1805 does not return a value.
1807 d_voidsig (d_voidsig.U):
1808 This variable conditionally defines VOIDSIG if this system
1809 declares "void (*signal(...))()" in signal.h. The old way was to
1810 declare it as "int (*signal(...))()".
1812 d_voidtty (i_sysioctl.U):
1813 This variable conditionally defines USE_IOCNOTTY to indicate that the
1814 ioctl() call with TIOCNOTTY should be used to void tty association.
1815 Otherwise (on USG probably), it is enough to close the standard file
1816 decriptors and do a setpgrp().
1818 d_volatile (d_volatile.U):
1819 This variable conditionally defines the HASVOLATILE symbol, which
1820 indicates to the C program that this C compiler knows about the
1821 volatile declaration.
1823 d_vprintf (d_vprintf.U):
1824 This variable conditionally defines the HAS_VPRINTF symbol, which
1825 indicates to the C program that the vprintf() routine is available
1826 to printf with a pointer to an argument list.
1828 d_wait4 (d_wait4.U):
1829 This variable conditionally defines the HAS_WAIT4 symbol, which
1830 indicates the wait4() routine is available.
1832 d_waitpid (d_waitpid.U):
1833 This variable conditionally defines HAS_WAITPID if waitpid() is
1834 available to wait for child process.
1836 d_wcstombs (d_wcstombs.U):
1837 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1838 indicates to the C program that the wcstombs() routine is available
1839 to convert wide character strings to multibyte strings.
1841 d_wctomb (d_wctomb.U):
1842 This variable conditionally defines the HAS_WCTOMB symbol, which
1843 indicates to the C program that the wctomb() routine is available
1844 to convert a wide character to a multibyte.
1846 d_writev (d_writev.U):
1847 This variable conditionally defines the HAS_WRITEV symbol, which
1848 indicates to the C program that the writev() routine is available.
1851 This variable conditionally defines the symbol XENIX, which alerts
1852 the C program that it runs under Xenix.
1855 This variable is used internally by Configure to determine the
1856 full pathname (if any) of the date program. After Configure runs,
1857 the value is reset to a plain "date" and is not useful.
1859 db_hashtype (i_db.U):
1860 This variable contains the type of the hash structure element
1861 in the <db.h> header file. In older versions of DB, it was
1862 int, while in newer ones it is u_int32_t.
1864 db_prefixtype (i_db.U):
1865 This variable contains the type of the prefix structure element
1866 in the <db.h> header file. In older versions of DB, it was
1867 int, while in newer ones it is size_t.
1869 db_version_major (i_db.U):
1870 This variable contains the major version number of
1871 Berkeley DB found in the <db.h> header file.
1873 db_version_minor (i_db.U):
1874 This variable contains the minor version number of
1875 Berkeley DB found in the <db.h> header file.
1876 For DB version 1 this is always 0.
1878 db_version_patch (i_db.U):
1879 This variable contains the patch version number of
1880 Berkeley DB found in the <db.h> header file.
1881 For DB version 1 this is always 0.
1883 defvoidused (voidflags.U):
1884 This variable contains the default value of the VOIDUSED symbol (15).
1886 direntrytype (i_dirent.U):
1887 This symbol is set to 'struct direct' or 'struct dirent' depending on
1888 whether dirent is available or not. You should use this pseudo type to
1889 portably declare your directory entries.
1892 This variable contains the extension that is to be used for the
1893 dynamically loaded modules that perl generaties.
1896 This variable contains the name of the dynamic loading file that
1897 will be used with the package.
1899 doublesize (doublesize.U):
1900 This variable contains the value of the DOUBLESIZE symbol, which
1901 indicates to the C program how many bytes there are in a double.
1903 drand01 (randfunc.U):
1904 Indicates the macro to be used to generate normalized
1905 random numbers. Uses randfunc, often divided by
1906 (double) (((unsigned long) 1 << randbits)) in order to
1907 normalize the result.
1908 In C programs, the macro 'Drand01' is mapped to drand01.
1910 dynamic_ext (Extensions.U):
1911 This variable holds a list of XS extension files we want to
1912 link dynamically into the package. It is used by Makefile.
1914 eagain (nblock_io.U):
1915 This variable bears the symbolic errno code set by read() when no
1916 data is present on the file and non-blocking I/O was enabled (otherwise,
1917 read() blocks naturally).
1920 This variable conditionally defines EBCDIC if this
1921 system uses EBCDIC encoding. Among other things, this
1922 means that the character ranges are not contiguous.
1926 This variable is used internally by Configure to determine the
1927 full pathname (if any) of the echo program. After Configure runs,
1928 the value is reset to a plain "echo" and is not useful.
1931 This variable is used internally by Configure to determine the
1932 full pathname (if any) of the egrep program. After Configure runs,
1933 the value is reset to a plain "egrep" and is not useful.
1936 This variable is defined but not used by Configure.
1937 The value is a plain '' and is not useful.
1940 When running under Eunice this variable contains a command which will
1941 convert a shell script to the proper form of text file for it to be
1942 executable by the shell. On other systems it is a no-op.
1945 This is an old synonym for _exe.
1948 This variable is used internally by Configure to determine the
1949 full pathname (if any) of the expr program. After Configure runs,
1950 the value is reset to a plain "expr" and is not useful.
1952 extensions (Extensions.U):
1953 This variable holds a list of all extension files (both XS and
1954 non-xs linked into the package. It is propagated to Config.pm
1955 and is typically used to test whether a particular extesion
1958 fflushall (fflushall.U):
1959 This symbol, if defined, tells that to flush
1960 all pending stdio output one must loop through all
1961 the stdio file handles stored in an array and fflush them.
1962 Note that if fflushNULL is defined, fflushall will not
1963 even be probed for and will be left undefined.
1965 fflushNULL (fflushall.U):
1966 This symbol, if defined, tells that fflush(NULL) does flush
1967 all pending stdio output.
1970 This variable is defined but not used by Configure.
1971 The value is a plain '' and is not useful.
1973 firstmakefile (Unix.U):
1974 This variable defines the first file searched by make. On unix,
1975 it is makefile (then Makefile). On case-insensitive systems,
1976 it might be something else. This is only used to deal with
1977 convoluted make depend tricks.
1980 This variable is defined but not used by Configure.
1981 The value is a plain '' and is not useful.
1983 fpossize (fpossize.U):
1984 This variable contains the size of a fpostype in bytes.
1986 fpostype (fpostype.U):
1987 This variable defines Fpos_t to be something like fpos_t, long,
1988 uint, or whatever type is used to declare file positions in libc.
1990 freetype (mallocsrc.U):
1991 This variable contains the return type of free(). It is usually
1992 void, but occasionally int.
1995 This variable contains the command used by Configure
1996 to copy files from the target host. Useful and available
1997 only during Perl build.
1998 The string ':' if not cross-compiling.
2001 This variable contains the full pathname to 'ar', whether or
2002 not the user has specified 'portability'. This is only used
2006 This variable contains the full pathname to 'csh', whether or
2007 not the user has specified 'portability'. This is only used
2008 in the compiled C program, and we assume that all systems which
2009 can share this executable will have the same full pathname to
2012 full_sed (Loc_sed.U):
2013 This variable contains the full pathname to 'sed', whether or
2014 not the user has specified 'portability'. This is only used
2015 in the compiled C program, and we assume that all systems which
2016 can share this executable will have the same full pathname to
2019 gccosandvers (gccvers.U):
2020 If GNU cc (gcc) is used, this variable the operating system and
2021 version used to compile the gcc. It is set to '' if not gcc,
2022 or if nothing useful can be parsed as the os version.
2024 gccversion (gccvers.U):
2025 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2026 indicate whether the compiler is version 1 or 2. This is used in
2027 setting some of the default cflags. It is set to '' if not gcc.
2030 This variable contains the format string used for printing a Gid_t.
2032 gidsign (gidsign.U):
2033 This variable contains the signedness of a gidtype.
2034 1 for unsigned, -1 for signed.
2036 gidsize (gidsize.U):
2037 This variable contains the size of a gidtype in bytes.
2039 gidtype (gidtype.U):
2040 This variable defines Gid_t to be something like gid_t, int,
2041 ushort, or whatever type is used to declare the return type
2042 of getgid(). Typically, it is the type of group ids in the kernel.
2045 This variable holds the general path (space-separated) used to
2046 find libraries. It may contain directories that do not exist on
2047 this platform, libpth is the cleaned-up version.
2050 This variable is used internally by Configure to determine the
2051 full pathname (if any) of the grep program. After Configure runs,
2052 the value is reset to a plain "grep" and is not useful.
2055 This variable contains a command that produces the text of the
2056 /etc/group file. This is normally "cat /etc/group", but can be
2057 "ypcat group" when NIS is used.
2058 On some systems, such as os390, there may be no equivalent
2059 command, in which case this variable is unset.
2061 groupstype (groupstype.U):
2062 This variable defines Groups_t to be something like gid_t, int,
2063 ushort, or whatever type is used for the second argument to
2064 getgroups() and setgroups(). Usually, this is the same as
2065 gidtype (gid_t), but sometimes it isn't.
2068 This variable is used internally by Configure to determine the
2069 full pathname (if any) of the gzip program. After Configure runs,
2070 the value is reset to a plain "gzip" and is not useful.
2072 h_fcntl (h_fcntl.U):
2073 This is variable gets set in various places to tell i_fcntl that
2074 <fcntl.h> should be included.
2076 h_sysfile (h_sysfile.U):
2077 This is variable gets set in various places to tell i_sys_file that
2078 <sys/file.h> should be included.
2081 Gives the type of hints used for previous answers. May be one of
2082 "default", "recommended" or "previous".
2085 This variable contains a command that produces the text of the
2086 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2087 "ypcat hosts" when NIS is used.
2088 On some systems, such as os390, there may be no equivalent
2089 command, in which case this variable is unset.
2092 This variable is the size of an I16 in bytes.
2095 This variable contains the C type used for Perl's I16.
2098 This variable is the size of an I32 in bytes.
2101 This variable contains the C type used for Perl's I32.
2104 This variable is the size of an I64 in bytes.
2107 This variable contains the C type used for Perl's I64.
2110 This variable is the size of an I8 in bytes.
2113 This variable contains the C type used for Perl's I8.
2115 i_arpainet (i_arpainet.U):
2116 This variable conditionally defines the I_ARPA_INET symbol,
2117 and indicates whether a C program should include <arpa/inet.h>.
2119 i_bsdioctl (i_sysioctl.U):
2120 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2121 indicates to the C program that <sys/bsdioctl.h> exists and should
2125 This variable conditionally defines the I_DB symbol, and indicates
2126 whether a C program may include Berkeley's DB include file <db.h>.
2129 This variable conditionally defines the I_DBM symbol, which
2130 indicates to the C program that <dbm.h> exists and should
2133 i_dirent (i_dirent.U):
2134 This variable conditionally defines I_DIRENT, which indicates
2135 to the C program that it should include <dirent.h>.
2138 This variable conditionally defines the I_DLD symbol, which
2139 indicates to the C program that <dld.h> (GNU dynamic loading)
2140 exists and should be included.
2142 i_dlfcn (i_dlfcn.U):
2143 This variable conditionally defines the I_DLFCN symbol, which
2144 indicates to the C program that <dlfcn.h> exists and should
2147 i_fcntl (i_fcntl.U):
2148 This variable controls the value of I_FCNTL (which tells
2149 the C program to include <fcntl.h>).
2151 i_float (i_float.U):
2152 This variable conditionally defines the I_FLOAT symbol, and indicates
2153 whether a C program may include <float.h> to get symbols like DBL_MAX
2154 or DBL_MIN, i.e. machine dependent floating point values.
2157 This variable conditionally defines the I_GDBM symbol, which
2158 indicates to the C program that <gdbm.h> exists and should
2162 This variable conditionally defines the I_GRP symbol, and indicates
2163 whether a C program should include <grp.h>.
2165 i_iconv (i_iconv.U):
2166 This variable conditionally defines the I_ICONV symbol, and indicates
2167 whether a C program should include <iconv.h>.
2169 i_ieeefp (i_ieeefp.U):
2170 This variable conditionally defines the I_IEEEFP symbol, and indicates
2171 whether a C program should include <ieeefp.h>.
2173 i_inttypes (i_inttypes.U):
2174 This variable conditionally defines the I_INTTYPES symbol,
2175 and indicates whether a C program should include <inttypes.h>.
2177 i_langinfo (i_langinfo.U):
2178 This variable conditionally defines the I_LANGINFO symbol,
2179 and indicates whether a C program should include <langinfo.h>.
2181 i_libutil (i_libutil.U):
2182 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2183 whether a C program should include <libutil.h>.
2185 i_limits (i_limits.U):
2186 This variable conditionally defines the I_LIMITS symbol, and indicates
2187 whether a C program may include <limits.h> to get symbols like WORD_BIT
2190 i_locale (i_locale.U):
2191 This variable conditionally defines the I_LOCALE symbol,
2192 and indicates whether a C program should include <locale.h>.
2194 i_machcthr (i_machcthr.U):
2195 This variable conditionally defines the I_MACH_CTHREADS symbol,
2196 and indicates whether a C program should include <mach/cthreads.h>.
2198 i_malloc (i_malloc.U):
2199 This variable conditionally defines the I_MALLOC symbol, and indicates
2200 whether a C program should include <malloc.h>.
2203 This variable conditionally defines the I_MATH symbol, and indicates
2204 whether a C program may include <math.h>.
2206 i_memory (i_memory.U):
2207 This variable conditionally defines the I_MEMORY symbol, and indicates
2208 whether a C program should include <memory.h>.
2210 i_mntent (i_mntent.U):
2211 This variable conditionally defines the I_MNTENT symbol, and indicates
2212 whether a C program should include <mntent.h>.
2215 This variable conditionally defines the I_NDBM symbol, which
2216 indicates to the C program that <ndbm.h> exists and should
2219 i_netdb (i_netdb.U):
2220 This variable conditionally defines the I_NETDB symbol, and indicates
2221 whether a C program should include <netdb.h>.
2223 i_neterrno (i_neterrno.U):
2224 This variable conditionally defines the I_NET_ERRNO symbol, which
2225 indicates to the C program that <net/errno.h> exists and should
2228 i_netinettcp (i_netinettcp.U):
2229 This variable conditionally defines the I_NETINET_TCP symbol,
2230 and indicates whether a C program should include <netinet/tcp.h>.
2233 This variable conditionally defines I_NETINET_IN, which indicates
2234 to the C program that it should include <netinet/in.h>. Otherwise,
2235 you may try <sys/in.h>.
2238 This variable conditionally defines the I_POLL symbol, and indicates
2239 whether a C program should include <poll.h>.
2242 This variable conditionally defines the I_PROT symbol, and indicates
2243 whether a C program should include <prot.h>.
2245 i_pthread (i_pthread.U):
2246 This variable conditionally defines the I_PTHREAD symbol,
2247 and indicates whether a C program should include <pthread.h>.
2250 This variable conditionally defines I_PWD, which indicates
2251 to the C program that it should include <pwd.h>.
2253 i_rpcsvcdbm (i_dbm.U):
2254 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2255 indicates to the C program that <rpcsvc/dbm.h> exists and should
2256 be included. Some System V systems might need this instead of <dbm.h>.
2259 This variable conditionally defines the I_SFIO symbol,
2260 and indicates whether a C program should include <sfio.h>.
2262 i_sgtty (i_termio.U):
2263 This variable conditionally defines the I_SGTTY symbol, which
2264 indicates to the C program that it should include <sgtty.h> rather
2267 i_shadow (i_shadow.U):
2268 This variable conditionally defines the I_SHADOW symbol, and indicates
2269 whether a C program should include <shadow.h>.
2271 i_socks (i_socks.U):
2272 This variable conditionally defines the I_SOCKS symbol, and indicates
2273 whether a C program should include <socks.h>.
2275 i_stdarg (i_varhdr.U):
2276 This variable conditionally defines the I_STDARG symbol, which
2277 indicates to the C program that <stdarg.h> exists and should
2280 i_stddef (i_stddef.U):
2281 This variable conditionally defines the I_STDDEF symbol, which
2282 indicates to the C program that <stddef.h> exists and should
2285 i_stdlib (i_stdlib.U):
2286 This variable conditionally defines the I_STDLIB symbol, which
2287 indicates to the C program that <stdlib.h> exists and should
2290 i_string (i_string.U):
2291 This variable conditionally defines the I_STRING symbol, which
2292 indicates that <string.h> should be included rather than <strings.h>.
2294 i_sunmath (i_sunmath.U):
2295 This variable conditionally defines the I_SUNMATH symbol, and indicates
2296 whether a C program should include <sunmath.h>.
2298 i_sysaccess (i_sysaccess.U):
2299 This variable conditionally defines the I_SYS_ACCESS symbol,
2300 and indicates whether a C program should include <sys/access.h>.
2302 i_sysdir (i_sysdir.U):
2303 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2304 whether a C program should include <sys/dir.h>.
2306 i_sysfile (i_sysfile.U):
2307 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2308 whether a C program should include <sys/file.h> to get R_OK and friends.
2310 i_sysfilio (i_sysioctl.U):
2311 This variable conditionally defines the I_SYS_FILIO symbol, which
2312 indicates to the C program that <sys/filio.h> exists and should
2313 be included in preference to <sys/ioctl.h>.
2316 This variable conditionally defines I_SYS_IN, which indicates
2317 to the C program that it should include <sys/in.h> instead of
2320 i_sysioctl (i_sysioctl.U):
2321 This variable conditionally defines the I_SYS_IOCTL symbol, which
2322 indicates to the C program that <sys/ioctl.h> exists and should
2325 i_syslog (i_syslog.U):
2326 This variable conditionally defines the I_SYSLOG symbol,
2327 and indicates whether a C program should include <syslog.h>.
2329 i_sysmman (i_sysmman.U):
2330 This variable conditionally defines the I_SYS_MMAN symbol, and
2331 indicates whether a C program should include <sys/mman.h>.
2333 i_sysmode (i_sysmode.U):
2334 This variable conditionally defines the I_SYSMODE symbol,
2335 and indicates whether a C program should include <sys/mode.h>.
2337 i_sysmount (i_sysmount.U):
2338 This variable conditionally defines the I_SYSMOUNT symbol,
2339 and indicates whether a C program should include <sys/mount.h>.
2341 i_sysndir (i_sysndir.U):
2342 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2343 whether a C program should include <sys/ndir.h>.
2345 i_sysparam (i_sysparam.U):
2346 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2347 whether a C program should include <sys/param.h>.
2349 i_sysresrc (i_sysresrc.U):
2350 This variable conditionally defines the I_SYS_RESOURCE symbol,
2351 and indicates whether a C program should include <sys/resource.h>.
2353 i_syssecrt (i_syssecrt.U):
2354 This variable conditionally defines the I_SYS_SECURITY symbol,
2355 and indicates whether a C program should include <sys/security.h>.
2357 i_sysselct (i_sysselct.U):
2358 This variable conditionally defines I_SYS_SELECT, which indicates
2359 to the C program that it should include <sys/select.h> in order to
2360 get the definition of struct timeval.
2362 i_syssockio (i_sysioctl.U):
2363 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2364 C program that socket ioctl codes may be found in <sys/sockio.h>
2365 instead of <sys/ioctl.h>.
2367 i_sysstat (i_sysstat.U):
2368 This variable conditionally defines the I_SYS_STAT symbol,
2369 and indicates whether a C program should include <sys/stat.h>.
2371 i_sysstatfs (i_sysstatfs.U):
2372 This variable conditionally defines the I_SYSSTATFS symbol,
2373 and indicates whether a C program should include <sys/statfs.h>.
2375 i_sysstatvfs (i_sysstatvfs.U):
2376 This variable conditionally defines the I_SYSSTATVFS symbol,
2377 and indicates whether a C program should include <sys/statvfs.h>.
2379 i_systime (i_time.U):
2380 This variable conditionally defines I_SYS_TIME, which indicates
2381 to the C program that it should include <sys/time.h>.
2383 i_systimek (i_time.U):
2384 This variable conditionally defines I_SYS_TIME_KERNEL, which
2385 indicates to the C program that it should include <sys/time.h>
2386 with KERNEL defined.
2388 i_systimes (i_systimes.U):
2389 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2390 whether a C program should include <sys/times.h>.
2392 i_systypes (i_systypes.U):
2393 This variable conditionally defines the I_SYS_TYPES symbol,
2394 and indicates whether a C program should include <sys/types.h>.
2396 i_sysuio (i_sysuio.U):
2397 This variable conditionally defines the I_SYSUIO symbol, and indicates
2398 whether a C program should include <sys/uio.h>.
2400 i_sysun (i_sysun.U):
2401 This variable conditionally defines I_SYS_UN, which indicates
2402 to the C program that it should include <sys/un.h> to get UNIX
2403 domain socket definitions.
2405 i_sysutsname (i_sysutsname.U):
2406 This variable conditionally defines the I_SYSUTSNAME symbol,
2407 and indicates whether a C program should include <sys/utsname.h>.
2409 i_sysvfs (i_sysvfs.U):
2410 This variable conditionally defines the I_SYSVFS symbol,
2411 and indicates whether a C program should include <sys/vfs.h>.
2413 i_syswait (i_syswait.U):
2414 This variable conditionally defines I_SYS_WAIT, which indicates
2415 to the C program that it should include <sys/wait.h>.
2417 i_termio (i_termio.U):
2418 This variable conditionally defines the I_TERMIO symbol, which
2419 indicates to the C program that it should include <termio.h> rather
2422 i_termios (i_termio.U):
2423 This variable conditionally defines the I_TERMIOS symbol, which
2424 indicates to the C program that the POSIX <termios.h> file is
2428 This variable conditionally defines I_TIME, which indicates
2429 to the C program that it should include <time.h>.
2431 i_unistd (i_unistd.U):
2432 This variable conditionally defines the I_UNISTD symbol, and indicates
2433 whether a C program should include <unistd.h>.
2435 i_ustat (i_ustat.U):
2436 This variable conditionally defines the I_USTAT symbol, and indicates
2437 whether a C program should include <ustat.h>.
2439 i_utime (i_utime.U):
2440 This variable conditionally defines the I_UTIME symbol, and indicates
2441 whether a C program should include <utime.h>.
2443 i_values (i_values.U):
2444 This variable conditionally defines the I_VALUES symbol, and indicates
2445 whether a C program may include <values.h> to get symbols like MAXLONG
2448 i_varargs (i_varhdr.U):
2449 This variable conditionally defines I_VARARGS, which indicates
2450 to the C program that it should include <varargs.h>.
2452 i_varhdr (i_varhdr.U):
2453 Contains the name of the header to be included to get va_dcl definition.
2454 Typically one of varargs.h or stdarg.h.
2456 i_vfork (i_vfork.U):
2457 This variable conditionally defines the I_VFORK symbol, and indicates
2458 whether a C program should include vfork.h.
2460 ignore_versioned_solibs (libs.U):
2461 This variable should be non-empty if non-versioned shared
2462 libraries (libfoo.so.x.y) are to be ignored (because they
2463 cannot be linked against).
2465 inc_version_list (inc_version_list.U):
2466 This variable specifies the list of subdirectories in over
2467 which perl.c:incpush() and lib/lib.pm will automatically
2468 search when adding directories to @INC. The elements in
2469 the list are separated by spaces. This is only useful
2470 if you have a perl library directory tree structured like the
2471 default one. See INSTALL for how this works. The versioned
2472 site_perl directory was introduced in 5.005, so that is the
2473 lowest possible value.
2475 inc_version_list_init (inc_version_list.U):
2476 This variable holds the same list as inc_version_list, but
2477 each item is enclosed in double quotes and separated by commas,
2478 suitable for use in the PERL_INC_VERSION_LIST initialization.
2481 This variable must preceed the normal include path to get hte
2482 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2483 Value can be "" or "/bsd43" on mips.
2486 This variable is defined but not used by Configure.
2487 The value is a plain '' and is not useful.
2489 installarchlib (archlib.U):
2490 This variable is really the same as archlibexp but may differ on
2491 those systems using AFS. For extra portability, only this variable
2492 should be used in makefiles.
2495 This variable is the same as binexp unless AFS is running in which case
2496 the user is explicitely prompted for it. This variable should always
2497 be used in your makefiles for maximum portability.
2499 installman1dir (man1dir.U):
2500 This variable is really the same as man1direxp, unless you are using
2501 AFS in which case it points to the read/write location whereas
2502 man1direxp only points to the read-only access location. For extra
2503 portability, you should only use this variable within your makefiles.
2505 installman3dir (man3dir.U):
2506 This variable is really the same as man3direxp, unless you are using
2507 AFS in which case it points to the read/write location whereas
2508 man3direxp only points to the read-only access location. For extra
2509 portability, you should only use this variable within your makefiles.
2511 installprefix (installprefix.U):
2512 This variable holds the name of the directory below which
2513 "make install" will install the package. For most users, this
2514 is the same as prefix. However, it is useful for
2515 installing the software into a different (usually temporary)
2516 location after which it can be bundled up and moved somehow
2517 to the final location specified by prefix.
2519 installprefixexp (installprefix.U):
2520 This variable holds the full absolute path of installprefix
2521 with all ~-expansion done.
2523 installprivlib (privlib.U):
2524 This variable is really the same as privlibexp but may differ on
2525 those systems using AFS. For extra portability, only this variable
2526 should be used in makefiles.
2528 installscript (scriptdir.U):
2529 This variable is usually the same as scriptdirexp, unless you are on
2530 a system running AFS, in which case they may differ slightly. You
2531 should always use this variable within your makefiles for portability.
2533 installsitearch (sitearch.U):
2534 This variable is really the same as sitearchexp but may differ on
2535 those systems using AFS. For extra portability, only this variable
2536 should be used in makefiles.
2538 installsitebin (sitebin.U):
2539 This variable is usually the same as sitebinexp, unless you are on
2540 a system running AFS, in which case they may differ slightly. You
2541 should always use this variable within your makefiles for portability.
2543 installsitelib (sitelib.U):
2544 This variable is really the same as sitelibexp but may differ on
2545 those systems using AFS. For extra portability, only this variable
2546 should be used in makefiles.
2548 installstyle (installstyle.U):
2549 This variable describes the "style" of the perl installation.
2550 This is intended to be useful for tools that need to
2551 manipulate entire perl distributions. Perl itself doesn't use
2552 this to find its libraries -- the library directories are
2553 stored directly in Config.pm. Currently, there are only two
2554 styles: "lib" and "lib/perl5". The default library locations
2555 (e.g. privlib, sitelib) are either $prefix/lib or
2556 $prefix/lib/perl5. The former is useful if $prefix is a
2557 directory dedicated to perl (e.g. /opt/perl), while the latter
2558 is useful if $prefix is shared by many packages, e.g. if
2560 This may later be extended to include other information, so
2561 be careful with pattern-matching on the results.
2562 For compatibility with perl5.005 and earlier, the default
2563 setting is based on whether or not $prefix contains the string
2566 installusrbinperl (instubperl.U):
2567 This variable tells whether Perl should be installed also as
2568 /usr/bin/perl in addition to
2571 installvendorarch (vendorarch.U):
2572 This variable is really the same as vendorarchexp but may differ on
2573 those systems using AFS. For extra portability, only this variable
2574 should be used in makefiles.
2576 installvendorbin (vendorbin.U):
2577 This variable is really the same as vendorbinexp but may differ on
2578 those systems using AFS. For extra portability, only this variable
2579 should be used in makefiles.
2581 installvendorlib (vendorlib.U):
2582 This variable is really the same as vendorlibexp but may differ on
2583 those systems using AFS. For extra portability, only this variable
2584 should be used in makefiles.
2586 intsize (intsize.U):
2587 This variable contains the value of the INTSIZE symbol, which
2588 indicates to the C program how many bytes there are in an int.
2590 issymlink (issymlink.U):
2591 This variable holds the test command to test for a symbolic link
2592 (if they are supported). Typical values include 'test -h' and
2595 ivdformat (perlxvf.U):
2596 This variable contains the format string used for printing
2597 a Perl IV as a signed decimal integer.
2600 This variable is the size of an IV in bytes.
2603 This variable contains the C type used for Perl's IV.
2605 known_extensions (Extensions.U):
2606 This variable holds a list of all XS extensions included in
2610 This variable is defined but not used by Configure.
2611 The value is a plain '' and is not useful.
2614 This variable indicates the program to be used to link
2615 libraries for dynamic loading. On some systems, it is 'ld'.
2616 On ELF systems, it should be $cc. Mostly, we'll try to respect
2617 the hint file setting.
2619 lddlflags (dlsrc.U):
2620 This variable contains any special flags that might need to be
2621 passed to $ld to create a shared library suitable for dynamic
2622 loading. It is up to the makefile to use it. For hpux, it
2623 should be '-b'. For sunos 4.1, it is empty.
2625 ldflags (ccflags.U):
2626 This variable contains any additional C loader flags desired by
2627 the user. It is up to the Makefile to use this.
2629 ldflags_uselargefiles (uselfs.U):
2630 This variable contains the loader flags needed by large file builds
2631 and added to ldflags by hints files.
2633 ldlibpthname (libperl.U):
2634 This variable holds the name of the shared library
2635 search path, often LD_LIBRARY_PATH. To get an empty
2636 string, the hints file must set this to 'none'.
2639 This variable is used internally by Configure to determine the
2640 full pathname (if any) of the less program. After Configure runs,
2641 the value is reset to a plain "less" and is not useful.
2644 This is an old synonym for _a.
2647 This variable contains the location of the C library.
2649 libperl (libperl.U):
2650 The perl executable is obtained by linking perlmain.c with
2651 libperl, any static extensions (usually just DynaLoader),
2652 and any other libraries needed on this system. libperl
2653 is usually libperl.a, but can also be libperl.so.xxx if
2654 the user wishes to build a perl executable with a shared
2658 This variable holds the general path (space-separated) used to find
2659 libraries. It is intended to be used by other units.
2662 This variable holds the additional libraries we want to use.
2663 It is up to the Makefile to deal with it.
2666 This variable holds the directory names aka dirnames of the libraries
2667 we found and accepted, duplicates are removed.
2670 This variable holds the filenames aka basenames of the libraries
2671 we found and accepted.
2674 This variable holds the full pathnames of the libraries
2675 we found and accepted.
2678 This variable holds the directory names probed for libraries.
2680 libswanted (Myinit.U):
2681 This variable holds a list of all the libraries we want to
2682 search. The order is chosen to pick up the c library
2683 ahead of ucb or bsd libraries for SVR4.
2685 libswanted_uselargefiles (uselfs.U):
2686 This variable contains the libraries needed by large file builds
2687 and added to ldflags by hints files. It is a space separated list
2688 of the library names without the "lib" prefix or any suffix, just
2692 This variable is defined but not used by Configure.
2693 The value is a plain '' and is not useful.
2696 This variable is defined but not used by Configure.
2697 The value is a plain '' and is not useful.
2699 lkflags (ccflags.U):
2700 This variable contains any additional C partial linker flags desired by
2701 the user. It is up to the Makefile to use this.
2704 This variable is used internally by Configure to determine the
2705 full pathname (if any) of the ln program. After Configure runs,
2706 the value is reset to a plain "ln" and is not useful.
2709 This variable holds the name of the command to make
2710 symbolic links (if they are supported). It can be used
2711 in the Makefile. It is either 'ln -s' or 'ln'
2713 locincpth (ccflags.U):
2714 This variable contains a list of additional directories to be
2715 searched by the compiler. The appropriate '-I' directives will
2716 be added to ccflags. This is intended to simplify setting
2717 local directories from the Configure command line.
2718 It's not much, but it parallels the loclibpth stuff in libpth.U.
2720 loclibpth (libpth.U):
2721 This variable holds the paths (space-separated) used to find local
2722 libraries. It is prepended to libpth, and is intended to be easily
2723 set from the command line.
2725 longdblsize (d_longdbl.U):
2726 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2727 indicates to the C program how many bytes there are in a long double,
2728 if this system supports long doubles.
2730 longlongsize (d_longlong.U):
2731 This variable contains the value of the LONGLONGSIZE symbol, which
2732 indicates to the C program how many bytes there are in a long long,
2733 if this system supports long long.
2735 longsize (intsize.U):
2736 This variable contains the value of the LONGSIZE symbol, which
2737 indicates to the C program how many bytes there are in a long.
2740 This variable is defined but not used by Configure.
2741 The value is a plain '' and is not useful.
2744 This variable is defined but not used by Configure.
2745 The value is a plain '' and is not useful.
2748 This variable is used internally by Configure to determine the
2749 full pathname (if any) of the ls program. After Configure runs,
2750 the value is reset to a plain "ls" and is not useful.
2752 lseeksize (lseektype.U):
2753 This variable defines lseektype to be something like off_t, long,
2754 or whatever type is used to declare lseek offset's type in the
2755 kernel (which also appears to be lseek's return type).
2757 lseektype (lseektype.U):
2758 This variable defines lseektype to be something like off_t, long,
2759 or whatever type is used to declare lseek offset's type in the
2760 kernel (which also appears to be lseek's return type).
2763 This variable is defined but not used by Configure.
2764 The value is a plain '' and is not useful.
2767 This variable is defined but not used by Configure.
2768 The value is a plain '' and is not useful.
2771 This variable is used internally by Configure to determine the
2772 full pathname (if any) of the make program. After Configure runs,
2773 the value is reset to a plain "make" and is not useful.
2775 make_set_make (make.U):
2776 Some versions of 'make' set the variable MAKE. Others do not.
2777 This variable contains the string to be included in Makefile.SH
2778 so that MAKE is set if needed, and not if not needed.
2779 Possible values are:
2780 make_set_make='#' # If your make program handles this for you,
2781 make_set_make="MAKE=$make" # if it doesn't.
2782 I used a comment character so that we can distinguish a
2783 'set' value (from a previous config.sh or Configure '-D' option)
2784 from an uncomputed value.
2786 mallocobj (mallocsrc.U):
2787 This variable contains the name of the malloc.o that this package
2788 generates, if that malloc.o is preferred over the system malloc.
2789 Otherwise the value is null. This variable is intended for generating
2790 Makefiles. See mallocsrc.
2792 mallocsrc (mallocsrc.U):
2793 This variable contains the name of the malloc.c that comes with
2794 the package, if that malloc.c is preferred over the system malloc.
2795 Otherwise the value is null. This variable is intended for generating
2798 malloctype (mallocsrc.U):
2799 This variable contains the kind of ptr returned by malloc and realloc.
2801 man1dir (man1dir.U):
2802 This variable contains the name of the directory in which manual
2803 source pages are to be put. It is the responsibility of the
2804 Makefile.SH to get the value of this into the proper command.
2805 You must be prepared to do the ~name expansion yourself.
2807 man1direxp (man1dir.U):
2808 This variable is the same as the man1dir variable, but is filename
2809 expanded at configuration time, for convenient use in makefiles.
2811 man1ext (man1dir.U):
2812 This variable contains the extension that the manual page should
2813 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2816 man3dir (man3dir.U):
2817 This variable contains the name of the directory in which manual
2818 source pages are to be put. It is the responsibility of the
2819 Makefile.SH to get the value of this into the proper command.
2820 You must be prepared to do the ~name expansion yourself.
2822 man3direxp (man3dir.U):
2823 This variable is the same as the man3dir variable, but is filename
2824 expanded at configuration time, for convenient use in makefiles.
2826 man3ext (man3dir.U):
2827 This variable contains the extension that the manual page should
2828 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2832 This variable is used internally by Configure to determine the
2833 full pathname (if any) of the Mcc program. After Configure runs,
2834 the value is reset to a plain "Mcc" and is not useful.
2836 mips_type (usrinc.U):
2837 This variable holds the environment type for the mips system.
2838 Possible values are "BSD 4.3" and "System V".
2841 This variable is used internally by Configure to determine the
2842 full pathname (if any) of the mkdir program. After Configure runs,
2843 the value is reset to a plain "mkdir" and is not useful.
2845 mmaptype (d_mmap.U):
2846 This symbol contains the type of pointer returned by mmap()
2847 (and simultaneously the type of the first argument).
2848 It can be 'void *' or 'caddr_t'.
2850 modetype (modetype.U):
2851 This variable defines modetype to be something like mode_t,
2852 int, unsigned short, or whatever type is used to declare file
2853 modes for system calls.
2856 This variable is used internally by Configure to determine the
2857 full pathname (if any) of the more program. After Configure runs,
2858 the value is reset to a plain "more" and is not useful.
2860 multiarch (multiarch.U):
2861 This variable conditionally defines the MULTIARCH symbol
2862 which signifies the presence of multiplatform files.
2863 This is normally set by hints files.
2866 This variable is defined but not used by Configure.
2867 The value is a plain '' and is not useful.
2869 myarchname (archname.U):
2870 This variable holds the architecture name computed by Configure in
2871 a previous run. It is not intended to be perused by any user and
2872 should never be set in a hint file.
2874 mydomain (myhostname.U):
2875 This variable contains the eventual value of the MYDOMAIN symbol,
2876 which is the domain of the host the program is going to run on.
2877 The domain must be appended to myhostname to form a complete host name.
2878 The dot comes with mydomain, and need not be supplied by the program.
2880 myhostname (myhostname.U):
2881 This variable contains the eventual value of the MYHOSTNAME symbol,
2882 which is the name of the host the program is going to run on.
2883 The domain is not kept with hostname, but must be gotten from mydomain.
2884 The dot comes with mydomain, and need not be supplied by the program.
2886 myuname (Oldconfig.U):
2887 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2888 pseudo variables assignments in the output are stripped, thank you. The
2889 whole thing is then lower-cased.
2892 This variable contains the '-n' flag if that is what causes the echo
2893 command to suppress newline. Otherwise it is null. Correct usage is
2894 $echo $n "prompt for a question: $c".
2896 need_va_copy (need_va_copy.U):
2897 This symbol, if defined, indicates that the system stores
2898 the variable argument list datatype, va_list, in a format
2899 that cannot be copied by simple assignment, so that some
2900 other means must be used when copying is required.
2901 As such systems vary in their provision (or non-provision)
2902 of copying mechanisms, handy.h defines a platform-
2903 independent macro, Perl_va_copy(src, dst), to do the job.
2905 netdb_hlen_type (netdbtype.U):
2906 This variable holds the type used for the 2nd argument to
2907 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2908 This is only useful if you have gethostbyaddr(), naturally.
2910 netdb_host_type (netdbtype.U):
2911 This variable holds the type used for the 1st argument to
2912 gethostbyaddr(). Usually, this is char * or void *, possibly
2913 with or without a const prefix.
2914 This is only useful if you have gethostbyaddr(), naturally.
2916 netdb_name_type (netdbtype.U):
2917 This variable holds the type used for the argument to
2918 gethostbyname(). Usually, this is char * or const char *.
2919 This is only useful if you have gethostbyname(), naturally.
2921 netdb_net_type (netdbtype.U):
2922 This variable holds the type used for the 1st argument to
2923 getnetbyaddr(). Usually, this is int or long.
2924 This is only useful if you have getnetbyaddr(), naturally.
2927 This variable is used internally by Configure to determine the
2928 full pathname (if any) of the nm program. After Configure runs,
2929 the value is reset to a plain "nm" and is not useful.
2932 This variable holds the options that may be necessary for nm.
2934 nm_so_opt (usenm.U):
2935 This variable holds the options that may be necessary for nm
2936 to work on a shared library but that can not be used on an
2937 archive library. Currently, this is only used by Linux, where
2938 nm --dynamic is *required* to get symbols from an ELF library which
2939 has been stripped, but nm --dynamic is *fatal* on an archive library.
2940 Maybe Linux should just always set usenm=false.
2942 nonxs_ext (Extensions.U):
2943 This variable holds a list of all non-xs extensions included
2944 in the package. All of them will be built.
2947 This variable is used internally by Configure to determine the
2948 full pathname (if any) of the nroff program. After Configure runs,
2949 the value is reset to a plain "nroff" and is not useful.
2951 nveformat (perlxvf.U):
2952 This variable contains the format string used for printing
2953 a Perl NV using %e-ish floating point format.
2955 nvEUformat (perlxvf.U):
2956 This variable contains the format string used for printing
2957 a Perl NV using %E-ish floating point format.
2959 nvfformat (perlxvf.U):
2960 This variable confains the format string used for printing
2961 a Perl NV using %f-ish floating point format.
2963 nvFUformat (perlxvf.U):
2964 This variable confains the format string used for printing
2965 a Perl NV using %F-ish floating point format.
2967 nvgformat (perlxvf.U):
2968 This variable contains the format string used for printing
2969 a Perl NV using %g-ish floating point format.
2971 nvGUformat (perlxvf.U):
2972 This variable contains the format string used for printing
2973 a Perl NV using %G-ish floating point format.
2976 This variable is the size of an NV in bytes.
2979 This variable contains the C type used for Perl's NV.
2981 o_nonblock (nblock_io.U):
2982 This variable bears the symbol value to be used during open() or fcntl()
2983 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2984 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2985 but that is only supported by some devices.
2988 This is an old synonym for _o.
2990 old_pthread_create_joinable (d_pthrattrj.U):
2991 This variable defines the constant to use for creating joinable
2992 (aka undetached) pthreads. Unused if pthread.h defines
2993 PTHREAD_CREATE_JOINABLE. If used, possible values are
2994 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2996 optimize (ccflags.U):
2997 This variable contains any optimizer/debugger flag that should be used.
2998 It is up to the Makefile to use it.
3000 orderlib (orderlib.U):
3001 This variable is "true" if the components of libraries must be ordered
3002 (with `lorder $* | tsort`) before placing them in an archive. Set to
3003 "false" if ranlib or ar can generate random libraries.
3005 osname (Oldconfig.U):
3006 This variable contains the operating system name (e.g. sunos,
3007 solaris, hpux, etc.). It can be useful later on for setting
3008 defaults. Any spaces are replaced with underscores. It is set
3009 to a null string if we can't figure it out.
3011 osvers (Oldconfig.U):
3012 This variable contains the operating system version (e.g.
3013 4.1.3, 5.2, etc.). It is primarily used for helping select
3014 an appropriate hints file, but might be useful elsewhere for
3015 setting defaults. It is set to '' if we can't figure it out.
3016 We try to be flexible about how much of the version number
3017 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3018 same for this package, hints files might just be os_4.0 or
3019 os_4.1, etc., not keeping separate files for each little release.
3021 otherlibdirs (otherlibdirs.U):
3022 This variable contains a colon-separated set of paths for the perl
3023 binary to search for additional library files or modules.
3024 These directories will be tacked to the end of @INC.
3025 Perl will automatically search below each path for version-
3026 and architecture-specific directories. See inc_version_list
3028 A value of ' ' means 'none' and is used to preserve this value
3029 for the next run through Configure.
3031 package (package.U):
3032 This variable contains the name of the package being constructed.
3033 It is primarily intended for the use of later Configure units.
3036 This variable contains the name of the preferred pager on the system.
3037 Usual values are (the full pathnames of) more, less, pg, or cat.
3040 This variable contains a command that produces the text of the
3041 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3042 "ypcat passwd" when NIS is used.
3043 On some systems, such as os390, there may be no equivalent
3044 command, in which case this variable is unset.
3046 patchlevel (patchlevel.U):
3047 The patchlevel level of this package.
3048 The value of patchlevel comes from the patchlevel.h file.
3049 In a version number such as 5.6.1, this is the "6".
3050 In patchlevel.h, this is referred to as "PERL_VERSION".
3053 This is an old synonym for p_ in Head.U, the character
3054 used to separate elements in the command shell search PATH.
3057 This variable contains the full path (if any) to a previously
3058 installed perl5.005 or later suitable for running the script
3059 to determine inc_version_list.
3062 This variable is defined but not used by Configure.
3063 The value is a plain '' and is not useful.
3065 perl_patchlevel (patchlevel.U):
3066 This is the Perl patch level, a numeric change identifier,
3067 as defined by whichever source code maintenance system
3068 is used to maintain the patches; currently Perforce.
3069 It does not correlate with the Perl version numbers or
3070 the maintenance versus development dichotomy except
3071 by also being increasing.
3073 PERL_REVISION (Oldsyms.U):
3074 In a Perl version number such as 5.6.2, this is the 5.
3075 This value is manually set in patchlevel.h
3077 PERL_SUBVERSION (Oldsyms.U):
3078 In a Perl version number such as 5.6.2, this is the 2.
3079 Values greater than 50 represent potentially unstable
3080 development subversions.
3081 This value is manually set in patchlevel.h
3083 PERL_VERSION (Oldsyms.U):
3084 In a Perl version number such as 5.6.2, this is the 6.
3085 This value is manually set in patchlevel.h
3087 perladmin (perladmin.U):
3088 Electronic mail address of the perl5 administrator.
3091 The list of libraries needed by Perl only (any libraries needed
3092 by extensions only will by dropped, if using dynamic loading).
3094 perlpath (perlpath.U):
3095 This variable contains the eventual value of the PERLPATH symbol,
3096 which contains the name of the perl interpreter to be used in
3097 shell scripts and in the "eval 'exec'" idiom.
3100 This variable is used internally by Configure to determine the
3101 full pathname (if any) of the pg program. After Configure runs,
3102 the value is reset to a plain "pg" and is not useful.
3104 phostname (myhostname.U):
3105 This variable contains the eventual value of the PHOSTNAME symbol,
3106 which is a command that can be fed to popen() to get the host name.
3107 The program should probably not presume that the domain is or isn't
3110 pidtype (pidtype.U):
3111 This variable defines PIDTYPE to be something like pid_t, int,
3112 ushort, or whatever type is used to declare process ids in the kernel.
3115 Holds the private path used by Configure to find out the libraries.
3116 Its value is prepend to libpth. This variable takes care of special
3117 machines, like the mips. Usually, it should be empty.
3119 pm_apiversion (xs_apiversion.U):
3120 This variable contains the version of the oldest perl
3121 compatible with the present perl. (That is, pure perl modules
3122 written for $pm_apiversion will still work for the current
3123 version). perl.c:incpush() and lib/lib.pm will automatically
3124 search in $sitelib for older directories across major versions
3125 back to pm_apiversion. This is only useful if you have a perl
3126 library directory tree structured like the default one. The
3127 versioned site_perl library was introduced in 5.005, so that's
3128 the default setting for this variable. It's hard to imagine
3129 it changing before Perl6. It is included here for symmetry
3130 with xs_apiveprsion -- the searching algorithms will
3131 (presumably) be similar.
3132 See the INSTALL file for how this works.
3135 This variable is defined but not used by Configure.
3136 The value is a plain '' and is not useful.
3139 This variable is defined but not used by Configure.
3140 The value is a plain '' and is not useful.
3143 This variable holds the name of the directory below which the
3144 user will install the package. Usually, this is /usr/local, and
3145 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3146 man pages in /usr/local/man, etc. It is only used to set defaults
3147 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3149 prefixexp (prefix.U):
3150 This variable holds the full absolute path of the directory below
3151 which the user will install the package. Derived from prefix.
3153 privlib (privlib.U):
3154 This variable contains the eventual value of the PRIVLIB symbol,
3155 which is the name of the private library for this package. It may
3156 have a ~ on the front. It is up to the makefile to eventually create
3157 this directory while performing installation (with ~ substitution).
3159 privlibexp (privlib.U):
3160 This variable is the ~name expanded version of privlib, so that you
3161 may use it directly in Makefiles or shell scripts.
3163 prototype (prototype.U):
3164 This variable holds the eventual value of CAN_PROTOTYPE, which
3165 indicates the C compiler can handle funciton prototypes.
3167 ptrsize (ptrsize.U):
3168 This variable contains the value of the PTRSIZE symbol, which
3169 indicates to the C program how many bytes there are in a pointer.
3171 quadkind (quadtype.U):
3172 This variable, if defined, encodes the type of a quad:
3173 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3175 quadtype (quadtype.U):
3176 This variable defines Quad_t to be something like long, int,
3177 long long, int64_t, or whatever type is used for 64-bit integers.
3179 randbits (randfunc.U):
3180 Indicates how many bits are produced by the function used to
3181 generate normalized random numbers.
3183 randfunc (randfunc.U):
3184 Indicates the name of the random number function to use.
3185 Values include drand48, random, and rand. In C programs,
3186 the 'Drand01' macro is defined to generate uniformly distributed
3187 random numbers over the range [0., 1.[ (see drand01 and nrand).
3189 randseedtype (randfunc.U):
3190 Indicates the type of the argument of the seedfunc.
3192 ranlib (orderlib.U):
3193 This variable is set to the pathname of the ranlib program, if it is
3194 needed to generate random libraries. Set to ":" if ar can generate
3195 random libraries or if random libraries are not supported
3197 rd_nodata (nblock_io.U):
3198 This variable holds the return code from read() when no data is
3199 present. It should be -1, but some systems return 0 when O_NDELAY is
3200 used, which is a shame because you cannot make the difference between
3201 no data and an EOF.. Sigh!
3203 revision (patchlevel.U):
3204 The value of revision comes from the patchlevel.h file.
3205 In a version number such as 5.6.1, this is the "5".
3206 In patchlevel.h, this is referred to as "PERL_REVISION".
3209 This variable is used internally by Configure to determine the
3210 full pathname (if any) of the rm program. After Configure runs,
3211 the value is reset to a plain "rm" and is not useful.
3214 This variable is defined but not used by Configure.
3215 The value is a plain '' and is not useful.
3218 This variable contains the command used by Configure
3219 to copy and execute a cross-compiled executable in the
3220 target host. Useful and available only during Perl build.
3221 Empty string '' if not cross-compiling.
3224 This variable contains 'true' or 'false' depending whether the
3225 nm extraction should be performed or not, according to the value
3226 of usenm and the flags on the Configure command line.
3228 sched_yield (d_pthread_y.U):
3229 This variable defines the way to yield the execution
3230 of the current thread.
3232 scriptdir (scriptdir.U):
3233 This variable holds the name of the directory in which the user wants
3234 to put publicly scripts for the package in question. It is either
3235 the same directory as for binaries, or a special one that can be
3236 mounted across different architectures, like /usr/share. Programs
3237 must be prepared to deal with ~name expansion.
3239 scriptdirexp (scriptdir.U):
3240 This variable is the same as scriptdir, but is filename expanded
3241 at configuration time, for programs not wanting to bother with it.
3244 This variable is used internally by Configure to determine the
3245 full pathname (if any) of the sed program. After Configure runs,
3246 the value is reset to a plain "sed" and is not useful.
3248 seedfunc (randfunc.U):
3249 Indicates the random number generating seed function.
3250 Values include srand48, srandom, and srand.
3252 selectminbits (selectminbits.U):
3253 This variable holds the minimum number of bits operated by select.
3254 That is, if you do select(n, ...), how many bits at least will be
3255 cleared in the masks if some activity is detected. Usually this
3256 is either n or 32*ceil(n/32), especially many little-endians do
3257 the latter. This is only useful if you have select(), naturally.
3259 selecttype (selecttype.U):
3260 This variable holds the type used for the 2nd, 3rd, and 4th
3261 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3262 is defined, and 'int *' otherwise. This is only useful if you
3263 have select(), naturally.
3266 This variable is defined but not used by Configure.
3267 The value is a plain '' and is not useful.
3270 This variable contains the full pathname of the shell used
3271 on this system to execute Bourne shell scripts. Usually, this will be
3272 /bin/sh, though it's possible that some systems will have /bin/ksh,
3273 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3275 This unit comes before Options.U, so you can't set sh with a '-D'
3276 option, though you can override this (and startsh)
3277 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3280 This variable is defined but not used by Configure.
3281 The value is a plain '' and is not useful.
3283 sharpbang (spitshell.U):
3284 This variable contains the string #! if this system supports that
3287 shmattype (d_shmat.U):
3288 This symbol contains the type of pointer returned by shmat().
3289 It can be 'void *' or 'char *'.
3291 shortsize (intsize.U):
3292 This variable contains the value of the SHORTSIZE symbol which
3293 indicates to the C program how many bytes there are in a short.
3295 shrpenv (libperl.U):
3296 If the user builds a shared libperl.so, then we need to tell the
3297 'perl' executable where it will be able to find the installed libperl.so.
3298 One way to do this on some systems is to set the environment variable
3299 LD_RUN_PATH to the directory that will be the final location of the
3300 shared libperl.so. The makefile can use this with something like
3301 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3303 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3306 See the main perl Makefile.SH for actual working usage.
3307 Alternatively, we might be able to use a command line option such
3308 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3309 $archlibexp/CORE (Linux).
3311 shsharp (spitshell.U):
3312 This variable tells further Configure units whether your sh can
3315 sig_count (sig_name.U):
3316 This variable holds a number larger than the largest valid
3317 signal number. This is usually the same as the NSIG macro.
3319 sig_name (sig_name.U):
3320 This variable holds the signal names, space separated. The leading
3321 SIG in signal name is removed. A ZERO is prepended to the
3322 list. This is currently not used.
3324 sig_name_init (sig_name.U):
3325 This variable holds the signal names, enclosed in double quotes and
3326 separated by commas, suitable for use in the SIG_NAME definition
3327 below. A "ZERO" is prepended to the list, and the list is
3328 terminated with a plain 0. The leading SIG in signal names
3329 is removed. See sig_num.
3331 sig_num (sig_name.U):
3332 This variable holds the signal numbers, space separated. A ZERO is
3333 prepended to the list (corresponding to the fake SIGZERO), and
3334 the list is terminated with a 0. Those numbers correspond to
3335 the value of the signal listed in the same place within the
3338 sig_num_init (sig_name.U):
3339 This variable holds the signal numbers, enclosed in double quotes and
3340 separated by commas, suitable for use in the SIG_NUM definition
3341 below. A "ZERO" is prepended to the list, and the list is
3342 terminated with a plain 0.
3344 sig_size (sig_name.U):
3345 This variable contains the number of elements of the sig_name
3346 and sig_num arrays, excluding the final NULL entry.
3348 signal_t (d_voidsig.U):
3349 This variable holds the type of the signal handler (void or int).
3351 sitearch (sitearch.U):
3352 This variable contains the eventual value of the SITEARCH symbol,
3353 which is the name of the private library for this package. It may
3354 have a ~ on the front. It is up to the makefile to eventually create
3355 this directory while performing installation (with ~ substitution).
3356 The standard distribution will put nothing in this directory.
3357 After perl has been installed, users may install their own local
3358 architecture-dependent modules in this directory with
3359 MakeMaker Makefile.PL
3360 or equivalent. See INSTALL for details.
3362 sitearchexp (sitearch.U):
3363 This variable is the ~name expanded version of sitearch, so that you
3364 may use it directly in Makefiles or shell scripts.
3366 sitebin (sitebin.U):
3367 This variable holds the name of the directory in which the user wants
3368 to put add-on publicly executable files for the package in question. It
3369 is most often a local directory such as /usr/local/bin. Programs using
3370 this variable must be prepared to deal with ~name substitution.
3371 The standard distribution will put nothing in this directory.
3372 After perl has been installed, users may install their own local
3373 executables in this directory with
3374 MakeMaker Makefile.PL
3375 or equivalent. See INSTALL for details.
3377 sitebinexp (sitebin.U):
3378 This is the same as the sitebin variable, but is filename expanded at
3379 configuration time, for use in your makefiles.
3381 sitelib (sitelib.U):
3382 This variable contains the eventual value of the SITELIB symbol,
3383 which is the name of the private library for this package. It may
3384 have a ~ on the front. It is up to the makefile to eventually create
3385 this directory while performing installation (with ~ substitution).
3386 The standard distribution will put nothing in this directory.
3387 After perl has been installed, users may install their own local
3388 architecture-independent modules in this directory with
3389 MakeMaker Makefile.PL
3390 or equivalent. See INSTALL for details.
3392 sitelib_stem (sitelib.U):
3393 This variable is $sitelibexp with any trailing version-specific component
3394 removed. The elements in inc_version_list (inc_version_list.U) can
3395 be tacked onto this variable to generate a list of directories to search.
3397 sitelibexp (sitelib.U):
3398 This variable is the ~name expanded version of sitelib, so that you
3399 may use it directly in Makefiles or shell scripts.
3401 siteprefix (siteprefix.U):
3402 This variable holds the full absolute path of the directory below
3403 which the user will install add-on packages.
3404 See INSTALL for usage and examples.
3406 siteprefixexp (siteprefix.U):
3407 This variable holds the full absolute path of the directory below
3408 which the user will install add-on packages. Derived from siteprefix.
3410 sizesize (sizesize.U):
3411 This variable contains the size of a sizetype in bytes.
3413 sizetype (sizetype.U):
3414 This variable defines sizetype to be something like size_t,
3415 unsigned long, or whatever type is used to declare length
3416 parameters for string functions.
3419 This variable is defined but not used by Configure.
3420 The value is a plain '' and is not useful.
3423 This variable is defined but not used by Configure.
3424 The value is a plain '' and is not useful.
3427 This variable holds the extension used to identify shared libraries
3428 (also known as shared objects) on the system. Usually set to 'so'.
3430 sockethdr (d_socket.U):
3431 This variable has any cpp '-I' flags needed for socket support.
3433 socketlib (d_socket.U):
3434 This variable has the names of any libraries needed for socket support.
3436 socksizetype (socksizetype.U):
3437 This variable holds the type used for the size argument
3438 for various socket calls like accept. Usual values include
3439 socklen_t, size_t, and int.
3442 This variable is used internally by Configure to determine the
3443 full pathname (if any) of the sort program. After Configure runs,
3444 the value is reset to a plain "sort" and is not useful.
3446 spackage (package.U):
3447 This variable contains the name of the package being constructed,
3448 with the first letter uppercased, i.e. suitable for starting
3451 spitshell (spitshell.U):
3452 This variable contains the command necessary to spit out a runnable
3453 shell on this system. It is either cat or a grep '-v' for # comments.
3455 sPRId64 (quadfio.U):
3456 This variable, if defined, contains the string used by stdio to
3457 format 64-bit decimal numbers (format 'd') for output.
3459 sPRIeldbl (longdblfio.U):
3460 This variable, if defined, contains the string used by stdio to
3461 format long doubles (format 'e') for output.
3463 sPRIEUldbl (longdblfio.U):
3464 This variable, if defined, contains the string used by stdio to
3465 format long doubles (format 'E') for output.
3466 The 'U' in the name is to separate this from sPRIeldbl so that even
3467 case-blind systems can see the difference.
3469 sPRIfldbl (longdblfio.U):
3470 This variable, if defined, contains the string used by stdio to
3471 format long doubles (format 'f') for output.
3473 sPRIFUldbl (longdblfio.U):
3474 This variable, if defined, contains the string used by stdio to
3475 format long doubles (format 'F') for output.
3476 The 'U' in the name is to separate this from sPRIfldbl so that even
3477 case-blind systems can see the difference.
3479 sPRIgldbl (longdblfio.U):
3480 This variable, if defined, contains the string used by stdio to
3481 format long doubles (format 'g') for output.
3483 sPRIGUldbl (longdblfio.U):
3484 This variable, if defined, contains the string used by stdio to
3485 format long doubles (format 'G') for output.
3486 The 'U' in the name is to separate this from sPRIgldbl so that even
3487 case-blind systems can see the difference.
3489 sPRIi64 (quadfio.U):
3490 This variable, if defined, contains the string used by stdio to
3491 format 64-bit decimal numbers (format 'i') for output.
3493 sPRIo64 (quadfio.U):
3494 This variable, if defined, contains the string used by stdio to
3495 format 64-bit octal numbers (format 'o') for output.
3497 sPRIu64 (quadfio.U):
3498 This variable, if defined, contains the string used by stdio to
3499 format 64-bit unsigned decimal numbers (format 'u') for output.
3501 sPRIx64 (quadfio.U):
3502 This variable, if defined, contains the string used by stdio to
3503 format 64-bit hexadecimal numbers (format 'x') for output.
3505 sPRIXU64 (quadfio.U):
3506 This variable, if defined, contains the string used by stdio to
3507 format 64-bit hExADECimAl numbers (format 'X') for output.
3508 The 'U' in the name is to separate this from sPRIx64 so that even
3509 case-blind systems can see the difference.
3512 This variable holds the path to the package source. It is up to
3513 the Makefile to use this variable and set VPATH accordingly to
3514 find the sources remotely.
3516 sSCNfldbl (longdblfio.U):
3517 This variable, if defined, contains the string used by stdio to
3518 format long doubles (format 'f') for input.
3520 ssizetype (ssizetype.U):
3521 This variable defines ssizetype to be something like ssize_t,
3522 long or int. It is used by functions that return a count
3523 of bytes or an error condition. It must be a signed type.
3524 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3526 startperl (startperl.U):
3527 This variable contains the string to put on the front of a perl
3528 script to make sure (hopefully) that it runs with perl and not some
3529 shell. Of course, that leading line must be followed by the classical
3531 eval 'exec perl -S $0 ${1+"$@"}'
3532 if $running_under_some_shell;
3533 to guarantee perl startup should the shell execute the script. Note
3534 that this magic incatation is not understood by csh.
3536 startsh (startsh.U):
3537 This variable contains the string to put on the front of a shell
3538 script to make sure (hopefully) that it runs with sh and not some
3541 static_ext (Extensions.U):
3542 This variable holds a list of XS extension files we want to
3543 link statically into the package. It is used by Makefile.
3545 stdchar (stdchar.U):
3546 This variable conditionally defines STDCHAR to be the type of char
3547 used in stdio.h. It has the values "unsigned char" or "char".
3549 stdio_base (d_stdstdio.U):
3550 This variable defines how, given a FILE pointer, fp, to access the
3551 _base field (or equivalent) of stdio.h's FILE structure. This will
3552 be used to define the macro FILE_base(fp).
3554 stdio_bufsiz (d_stdstdio.U):
3555 This variable defines how, given a FILE pointer, fp, to determine
3556 the number of bytes store in the I/O buffer pointer to by the
3557 _base field (or equivalent) of stdio.h's FILE structure. This will
3558 be used to define the macro FILE_bufsiz(fp).
3560 stdio_cnt (d_stdstdio.U):
3561 This variable defines how, given a FILE pointer, fp, to access the
3562 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3563 be used to define the macro FILE_cnt(fp).
3565 stdio_filbuf (d_stdstdio.U):
3566 This variable defines how, given a FILE pointer, fp, to tell
3567 stdio to refill its internal buffers (?). This will
3568 be used to define the macro FILE_filbuf(fp).
3570 stdio_ptr (d_stdstdio.U):
3571 This variable defines how, given a FILE pointer, fp, to access the
3572 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3573 be used to define the macro FILE_ptr(fp).
3575 stdio_stream_array (stdio_streams.U):
3576 This variable tells the name of the array holding the stdio streams.
3577 Usual values include _iob, __iob, and __sF.
3579 strings (i_string.U):
3580 This variable holds the full path of the string header that will be
3581 used. Typically /usr/include/string.h or /usr/include/strings.h.
3584 This variable is defined but not used by Configure.
3585 The value is a plain '' and is not useful.
3587 subversion (patchlevel.U):
3588 The subversion level of this package.
3589 The value of subversion comes from the patchlevel.h file.
3590 In a version number such as 5.6.1, this is the "1".
3591 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3592 This is unique to perl.
3595 This variable holds the place where the manual is located on this
3596 system. It is not the place where the user wants to put his manual
3597 pages. Rather it is the place where Configure may look to find manual
3598 for unix commands (section 1 of the manual usually). See mansrc.
3601 This variable is defined but not used by Configure.
3602 The value is a plain '' and is not useful.
3605 This variable is defined but not used by Configure.
3606 The value is a plain '' and is not useful.
3608 targetarch (Cross.U):
3609 If cross-compiling, this variable contains the target architecture.
3610 If not, this will be empty.
3613 This variable is defined but not used by Configure.
3614 The value is a plain '' and is not useful.
3617 This variable is defined but not used by Configure.
3618 The value is a plain '' and is not useful.
3621 This variable is used internally by Configure to determine the
3622 full pathname (if any) of the test program. After Configure runs,
3623 the value is reset to a plain "test" and is not useful.
3625 timeincl (i_time.U):
3626 This variable holds the full path of the included time header(s).
3628 timetype (d_time.U):
3629 This variable holds the type returned by time(). It can be long,
3630 or time_t on BSD sites (in which case <sys/types.h> should be
3631 included). Anyway, the type Time_t should be used.
3634 This variable contains the command used by Configure
3635 to copy to from the target host. Useful and available
3636 only during Perl build.
3637 The string ':' if not cross-compiling.
3640 This variable is used internally by Configure to determine the
3641 full pathname (if any) of the touch program. After Configure runs,
3642 the value is reset to a plain "touch" and is not useful.
3645 This variable is used internally by Configure to determine the
3646 full pathname (if any) of the tr program. After Configure runs,
3647 the value is reset to a plain "tr" and is not useful.
3650 This variable contains the value to be passed to the tr(1)
3651 command to transliterate a newline. Typical values are
3652 '\012' and '\n'. This is needed for EBCDIC systems where
3653 newline is not necessarily '\012'.
3656 This variable is defined but not used by Configure.
3657 The value is a plain '' and is not useful.
3660 This variable is the size of an U16 in bytes.
3663 This variable contains the C type used for Perl's U16.
3666 This variable is the size of an U32 in bytes.
3669 This variable contains the C type used for Perl's U32.
3672 This variable is the size of an U64 in bytes.
3675 This variable contains the C type used for Perl's U64.
3678 This variable is the size of an U8 in bytes.
3681 This variable contains the C type used for Perl's U8.
3684 This variable contains the format string used for printing a Uid_t.
3686 uidsign (uidsign.U):
3687 This variable contains the signedness of a uidtype.
3688 1 for unsigned, -1 for signed.
3690 uidsize (uidsize.U):
3691 This variable contains the size of a uidtype in bytes.
3693 uidtype (uidtype.U):
3694 This variable defines Uid_t to be something like uid_t, int,
3695 ushort, or whatever type is used to declare user ids in the kernel.
3698 This variable is used internally by Configure to determine the
3699 full pathname (if any) of the uname program. After Configure runs,
3700 the value is reset to a plain "uname" and is not useful.
3703 This variable is used internally by Configure to determine the
3704 full pathname (if any) of the uniq program. After Configure runs,
3705 the value is reset to a plain "uniq" and is not useful.
3707 uquadtype (quadtype.U):
3708 This variable defines Uquad_t to be something like unsigned long,
3709 unsigned int, unsigned long long, uint64_t, or whatever type is
3710 used for 64-bit integers.
3712 use5005threads (usethreads.U):
3713 This variable conditionally defines the USE_5005THREADS symbol,
3714 and indicates that Perl should be built to use the 5.005-based
3715 threading implementation.
3717 use64bitall (use64bits.U):
3718 This variable conditionally defines the USE_64_BIT_ALL symbol,
3719 and indicates that 64-bit integer types should be used
3720 when available. The maximal possible
3721 64-bitness is employed: LP64 or ILP64, meaning that you will
3722 be able to use more than 2 gigabytes of memory. This mode is
3723 even more binary incompatible than USE_64_BIT_INT. You may not
3724 be able to run the resulting executable in a 32-bit CPU at all or
3725 you may need at least to reboot your OS to 64-bit mode.
3727 use64bitint (use64bits.U):
3728 This variable conditionally defines the USE_64_BIT_INT symbol,
3729 and indicates that 64-bit integer types should be used
3730 when available. The minimal possible 64-bitness
3731 is employed, just enough to get 64-bit integers into Perl.
3732 This may mean using for example "long longs", while your memory
3733 may still be limited to 2 gigabytes.
3735 usecrosscompile (Cross.U):
3736 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3737 and indicates that Perl has been cross-compiled.
3740 This variable indicates if the system supports dynamic
3741 loading of some sort. See also dlsrc and dlobj.
3743 useithreads (usethreads.U):
3744 This variable conditionally defines the USE_ITHREADS symbol,
3745 and indicates that Perl should be built to use the interpreter-based
3746 threading implementation.
3748 uselargefiles (uselfs.U):
3749 This variable conditionally defines the USE_LARGE_FILES symbol,
3750 and indicates that large file interfaces should be used when
3753 uselongdouble (uselongdbl.U):
3754 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3755 and indicates that long doubles should be used when available.
3757 usemorebits (usemorebits.U):
3758 This variable conditionally defines the USE_MORE_BITS symbol,
3759 and indicates that explicit 64-bit interfaces and long doubles
3760 should be used when available.
3762 usemultiplicity (usemultiplicity.U):
3763 This variable conditionally defines the MULTIPLICITY symbol,
3764 and indicates that Perl should be built to use multiplicity.
3766 usemymalloc (mallocsrc.U):
3767 This variable contains y if the malloc that comes with this package
3768 is desired over the system's version of malloc. People often include
3769 special versions of malloc for effiency, but such versions are often
3770 less portable. See also mallocsrc and mallocobj.
3771 If this is 'y', then -lmalloc is removed from $libs.
3774 This variable contains 'true' or 'false' depending whether the
3775 nm extraction is wanted or not.
3777 useopcode (Extensions.U):
3778 This variable holds either 'true' or 'false' to indicate
3779 whether the Opcode extension should be used. The sole
3780 use for this currently is to allow an easy mechanism
3781 for users to skip the Opcode extension from the Configure
3784 useperlio (useperlio.U):
3785 This variable conditionally defines the USE_PERLIO symbol,
3786 and indicates that the PerlIO abstraction should be
3789 useposix (Extensions.U):
3790 This variable holds either 'true' or 'false' to indicate
3791 whether the POSIX extension should be used. The sole
3792 use for this currently is to allow an easy mechanism
3793 for hints files to indicate that POSIX will not compile
3794 on a particular system.
3796 usereentrant (usethreads.U):
3797 This variable conditionally defines the USE_REENTRANT_API symbol,
3798 which indicates that the thread code may try to use the various
3799 _r versions of library functions. This is only potentially
3800 meaningful if usethreads is set and is very experimental, it is
3801 not even prompted for.
3804 This variable is set to true when the user agrees to use sfio.
3805 It is set to false when sfio is not available or when the user
3806 explicitely requests not to use sfio. It is here primarily so
3807 that command-line settings can override the auto-detection of
3808 d_sfio without running into a "WHOA THERE".
3810 useshrplib (libperl.U):
3811 This variable is set to 'yes' if the user wishes
3812 to build a shared libperl, and 'no' otherwise.
3814 usesocks (usesocks.U):
3815 This variable conditionally defines the USE_SOCKS symbol,
3816 and indicates that Perl should be built to use SOCKS.
3818 usethreads (usethreads.U):
3819 This variable conditionally defines the USE_THREADS symbol,
3820 and indicates that Perl should be built to use threads.
3822 usevendorprefix (vendorprefix.U):
3823 This variable tells whether the vendorprefix
3824 and consequently other vendor* paths are in use.
3826 usevfork (d_vfork.U):
3827 This variable is set to true when the user accepts to use vfork.
3828 It is set to false when no vfork is available or when the user
3829 explicitely requests not to use vfork.
3832 This variable holds the path of the include files, which is
3833 usually /usr/include. It is mainly used by other Configure units.
3836 This variable is defined but not used by Configure.
3837 The value is a plain '' and is not useful.
3839 uvoformat (perlxvf.U):
3840 This variable contains the format string used for printing
3841 a Perl UV as an unsigned octal integer.
3844 This variable is the size of a UV in bytes.
3847 This variable contains the C type used for Perl's UV.
3849 uvuformat (perlxvf.U):
3850 This variable contains the format string used for printing
3851 a Perl UV as an unsigned decimal integer.
3853 uvxformat (perlxvf.U):
3854 This variable contains the format string used for printing
3855 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3857 uvXUformat (perlxvf.U):
3858 This variable contains the format string used for printing
3859 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3861 vendorarch (vendorarch.U):
3862 This variable contains the value of the PERL_VENDORARCH symbol.
3863 It may have a ~ on the front.
3864 The standard distribution will put nothing in this directory.
3865 Vendors who distribute perl may wish to place their own
3866 architecture-dependent modules and extensions in this directory with
3867 MakeMaker Makefile.PL INSTALLDIRS=vendor
3868 or equivalent. See INSTALL for details.
3870 vendorarchexp (vendorarch.U):
3871 This variable is the ~name expanded version of vendorarch, so that you
3872 may use it directly in Makefiles or shell scripts.
3874 vendorbin (vendorbin.U):
3875 This variable contains the eventual value of the VENDORBIN symbol.
3876 It may have a ~ on the front.
3877 The standard distribution will put nothing in this directory.
3878 Vendors who distribute perl may wish to place additional
3879 binaries in this directory with
3880 MakeMaker Makefile.PL INSTALLDIRS=vendor
3881 or equivalent. See INSTALL for details.
3883 vendorbinexp (vendorbin.U):
3884 This variable is the ~name expanded version of vendorbin, so that you
3885 may use it directly in Makefiles or shell scripts.
3887 vendorlib (vendorlib.U):
3888 This variable contains the eventual value of the VENDORLIB symbol,
3889 which is the name of the private library for this package.
3890 The standard distribution will put nothing in this directory.
3891 Vendors who distribute perl may wish to place their own
3892 modules in this directory with
3893 MakeMaker Makefile.PL INSTALLDIRS=vendor
3894 or equivalent. See INSTALL for details.
3896 vendorlib_stem (vendorlib.U):
3897 This variable is $vendorlibexp with any trailing version-specific component
3898 removed. The elements in inc_version_list (inc_version_list.U) can
3899 be tacked onto this variable to generate a list of directories to search.
3901 vendorlibexp (vendorlib.U):
3902 This variable is the ~name expanded version of vendorlib, so that you
3903 may use it directly in Makefiles or shell scripts.
3905 vendorprefix (vendorprefix.U):
3906 This variable holds the full absolute path of the directory below
3907 which the vendor will install add-on packages.
3908 See INSTALL for usage and examples.
3910 vendorprefixexp (vendorprefix.U):
3911 This variable holds the full absolute path of the directory below
3912 which the vendor will install add-on packages. Derived from vendorprefix.
3914 version (patchlevel.U):
3915 The full version number of this package, such as 5.6.1 (or 5_6_1).
3916 This combines revision, patchlevel, and subversion to get the
3917 full version number, including any possible subversions.
3918 This is suitable for use as a directory name, and hence is
3919 filesystem dependent.
3921 version_patchlevel_string (patchlevel.U):
3922 This is a string combining version, subversion and
3923 perl_patchlevel (if perl_patchlevel is non-zero).
3924 It is typically something like
3925 'version 7 subversion 1' or
3926 'version 7 subversion 1 patchlevel 11224'
3927 It is computed here to avoid duplication of code in myconfig.SH
3930 versiononly (versiononly.U):
3931 If set, this symbol indicates that only the version-specific
3932 components of a perl installation should be installed.
3933 This may be useful for making a test installation of a new
3934 version without disturbing the existing installation.
3935 Setting versiononly is equivalent to setting installperl's -v option.
3936 In particular, the non-versioned scripts and programs such as
3937 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3938 (see INSTALL for a more complete list). Nor are the man
3940 Usually, this is undef.
3943 This variable is defined but not used by Configure.
3944 The value is a plain '' and is not useful.
3946 voidflags (voidflags.U):
3947 This variable contains the eventual value of the VOIDFLAGS symbol,
3948 which indicates how much support of the void type is given by this
3949 compiler. See VOIDFLAGS for more info.
3952 This variable holds extra path (space-separated) used to find
3953 libraries on this platform, for example CPU-specific libraries
3954 (on multi-CPU platforms) may be listed here.
3956 xs_apiversion (xs_apiversion.U):
3957 This variable contains the version of the oldest perl binary
3958 compatible with the present perl. perl.c:incpush() and
3959 lib/lib.pm will automatically search in $sitearch for older
3960 directories across major versions back to xs_apiversion.
3961 This is only useful if you have a perl library directory tree
3962 structured like the default one.
3963 See INSTALL for how this works.
3964 The versioned site_perl directory was introduced in 5.005,
3965 so that is the lowest possible value.
3966 Since this can depend on compile time options (such as
3967 bincompat) it is set by Configure. Other non-default sources
3968 of potential incompatibility, such as multiplicity, threads,
3969 debugging, 64bits, sfio, etc., are not checked for currently,
3970 though in principle we could go snooping around in old
3974 This variable holds the name of the compiler compiler we
3975 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3978 This variable contains any additional yacc flags desired by the
3979 user. It is up to the Makefile to use this.
3982 This variable is defined but not used by Configure.
3983 The value is a plain '' and is not useful.
3986 This variable is used internally by Configure to determine the
3987 full pathname (if any) of the zip program. After Configure runs,
3988 the value is reset to a plain "zip" and is not useful.