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
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is used internally by Configure to determine the
143 full pathname (if any) of the bison program. After Configure runs,
144 the value is reset to a plain "bison" and is not useful.
147 This variable is used internally by Configure to determine the
148 full pathname (if any) of the byacc program. After Configure runs,
149 the value is reset to a plain "byacc" and is not useful.
151 byteorder (byteorder.U):
152 This variable holds the byte order. In the following, larger digits
153 indicate more significance. The variable byteorder is either 4321
154 on a big-endian machine, or 1234 on a little-endian, or 87654321
155 on a Cray ... or 3412 with weird order !
158 This variable contains the \c string if that is what causes the echo
159 command to suppress newline. Otherwise it is null. Correct usage is
160 $echo $n "prompt for a question: $c".
162 castflags (d_castneg.U):
163 This variable contains a flag that precise difficulties the
164 compiler has casting odd floating values to unsigned long:
166 1 = couldn't cast < 0
167 2 = couldn't cast >= 0x80000000
168 4 = couldn't cast in argument expression list
171 This variable is used internally by Configure to determine the
172 full pathname (if any) of the cat program. After Configure runs,
173 the value is reset to a plain "cat" and is not useful.
176 This variable holds the name of a command to execute a C compiler which
177 can resolve multiple global references that happen to have the same
178 name. Usual values are 'cc' and 'gcc'.
179 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
181 cccdlflags (dlsrc.U):
182 This variable contains any special flags that might need to be
183 passed with 'cc -c' to compile modules to be used to create a shared
184 library that will be used for dynamic loading. For hpux, this
185 should be +z. It is up to the makefile to use it.
188 This variable contains any special flags that might need to be
189 passed to cc to link with a shared library for dynamic loading.
190 It is up to the makefile to use it. For sunos 4.1, it should
194 This variable contains any additional C compiler flags desired by
195 the user. It is up to the Makefile to use this.
197 ccflags_uselargefiles (uselfs.U):
198 This variable contains the compiler flags needed by large file builds
199 and added to ccflags by hints files.
202 This can set either by hints files or by Configure. If using
203 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
204 Some platforms, however, make good use of this by storing the
205 flavor of the C compiler being used here. For example if using
206 the Sun WorkShop suite, ccname will be 'workshop'.
208 ccsymbols (Cppsym.U):
209 The variable contains the symbols defined by the C compiler alone.
210 The symbols defined by cpp or by cc when it calls cpp are not in
211 this list, see cppsymbols and cppccsymbols.
212 The list is a space-separated list of symbol=value tokens.
214 ccversion (Checkcc.U):
215 This can set either by hints files or by Configure. If using
216 a (non-gcc) vendor cc, this variable may contain a version for
220 Login name of the person who ran the Configure script and answered the
221 questions. This is used to tag both config.sh and config_h.SH.
223 cf_email (cf_email.U):
224 Electronic mail address of the person who ran Configure. This can be
225 used by units that require the user's e-mail, like MailList.U.
228 Holds the output of the "date" command when the configuration file was
229 produced. This is used to tag both config.sh and config_h.SH.
231 charsize (charsize.U):
232 This variable contains the value of the CHARSIZE symbol, which
233 indicates to the C program how many bytes there are in a character.
236 This variable is defined but not used by Configure.
237 The value is a plain '' and is not useful.
240 This variable is defined but not used by Configure.
241 The value is a plain '' and is not useful.
244 This variable is defined but not used by Configure.
245 The value is a plain '' and is not useful.
247 clocktype (d_times.U):
248 This variable holds the type returned by times(). It can be long,
249 or clock_t on BSD sites (in which case <sys/types.h> should be
253 This variable is used internally by Configure to determine the
254 full pathname (if any) of the comm program. After Configure runs,
255 the value is reset to a plain "comm" and is not useful.
258 This variable is defined but not used by Configure.
259 The value is a plain '' and is not useful.
261 contains (contains.U):
262 This variable holds the command to do a grep with a proper return
263 status. On most sane systems it is simply "grep". On insane systems
264 it is a grep followed by a cat followed by a test. This variable
265 is primarily for the use of other Configure units.
268 This variable is used internally by Configure to determine the
269 full pathname (if any) of the cp program. After Configure runs,
270 the value is reset to a plain "cp" and is not useful.
273 This variable is defined but not used by Configure.
274 The value is a plain '' and is not useful.
277 This variable is used internally by Configure to determine the
278 full pathname (if any) of the cpp program. After Configure runs,
279 the value is reset to a plain "cpp" and is not useful.
281 cpp_stuff (cpp_stuff.U):
282 This variable contains an identification of the catenation mechanism
283 used by the C preprocessor.
285 cppccsymbols (Cppsym.U):
286 The variable contains the symbols defined by the C compiler
287 when it calls cpp. The symbols defined by the cc alone or cpp
288 alone are not in this list, see ccsymbols and cppsymbols.
289 The list is a space-separated list of symbol=value tokens.
291 cppflags (ccflags.U):
292 This variable holds the flags that will be passed to the C pre-
293 processor. It is up to the Makefile to use it.
295 cpplast (cppstdin.U):
296 This variable has the same functionality as cppminus, only it applies
297 to cpprun and not cppstdin.
299 cppminus (cppstdin.U):
300 This variable contains the second part of the string which will invoke
301 the C preprocessor on the standard input and produce to standard
302 output. This variable will have the value "-" if cppstdin needs
303 a minus to specify standard input, otherwise the value is "".
306 This variable contains the command which will invoke a C preprocessor
307 on standard input and put the output to stdout. It is guaranteed not
308 to be a wrapper and may be a null string if no preprocessor can be
309 made directly available. This preprocessor might be different from the
310 one used by the C compiler. Don't forget to append cpplast after the
311 preprocessor options.
313 cppstdin (cppstdin.U):
314 This variable contains the command which will invoke the C
315 preprocessor on standard input and put the output to stdout.
316 It is primarily used by other Configure units that ask about
317 preprocessor symbols.
319 cppsymbols (Cppsym.U):
320 The variable contains the symbols defined by the C preprocessor
321 alone. The symbols defined by cc or by cc when it calls cpp are
322 not in this list, see ccsymbols and cppccsymbols.
323 The list is a space-separated list of symbol=value tokens.
325 crosscompile (crosscompile.U):
326 This variable conditionally defines the CROSSCOMPILE symbol
327 which signifies that the build process is be a cross-compilation.
328 This is normally set by hints files or from Configure command line.
330 cryptlib (d_crypt.U):
331 This variable holds -lcrypt or the path to a libcrypt.a archive if
332 the crypt() function is not defined in the standard C library. It is
333 up to the Makefile to use this.
336 This variable is used internally by Configure to determine the
337 full pathname (if any) of the csh program. After Configure runs,
338 the value is reset to a plain "csh" and is not useful.
340 d__fwalk (d__fwalk.U):
341 This variable conditionally defines HAS__FWALK if _fwalk() is
342 available to apply a function to all the file handles.
344 d_access (d_access.U):
345 This variable conditionally defines HAS_ACCESS if the access() system
346 call is available to check for access permissions using real IDs.
348 d_accessx (d_accessx.U):
349 This variable conditionally defines the HAS_ACCESSX symbol, which
350 indicates to the C program that the accessx() routine is available.
353 This variable conditionally defines the HAS_ALARM symbol, which
354 indicates to the C program that the alarm() routine is available.
356 d_archlib (archlib.U):
357 This variable conditionally defines ARCHLIB to hold the pathname
358 of architecture-dependent library files for $package. If
359 $archlib is the same as $privlib, then this is set to undef.
362 This variable conditionally defines the HAS_ATOLF symbol, which
363 indicates to the C program that the atolf() routine is available.
366 This variable conditionally defines the HAS_ATOLL symbol, which
367 indicates to the C program that the atoll() routine is available.
369 d_attribut (d_attribut.U):
370 This variable conditionally defines HASATTRIBUTE, which
371 indicates the C compiler can check for function attributes,
372 such as printf formats.
375 This variable conditionally defines the HAS_BCMP symbol if
376 the bcmp() routine is available to compare strings.
379 This variable conditionally defines the HAS_BCOPY symbol if
380 the bcopy() routine is available to copy strings.
382 d_bincompat5005 (bincompat5005.U):
383 This variable conditionally defines BINCOMPAT5005 so that embed.h
384 can take special action if this version of Perl should be
385 binary-compatible with Perl 5.005. This is impossible for builds
386 that use features like threads and multiplicity it is always $undef
390 This symbol conditionally defines the symbol BSD when running on a
393 d_bsdgetpgrp (d_getpgrp.U):
394 This variable conditionally defines USE_BSD_GETPGRP if
395 getpgrp needs one arguments whereas USG one needs none.
397 d_bsdsetpgrp (d_setpgrp.U):
398 This variable conditionally defines USE_BSD_SETPGRP if
399 setpgrp needs two arguments whereas USG one needs none.
400 See also d_setpgid for a POSIX interface.
403 This variable conditionally defines the HAS_BZERO symbol if
404 the bzero() routine is available to set memory to 0.
406 d_casti32 (d_casti32.U):
407 This variable conditionally defines CASTI32, which indicates
408 whether the C compiler can cast large floats to 32-bit ints.
410 d_castneg (d_castneg.U):
411 This variable conditionally defines CASTNEG, which indicates
412 wether the C compiler can cast negative float to unsigned.
414 d_charvspr (d_vprintf.U):
415 This variable conditionally defines CHARVSPRINTF if this system
416 has vsprintf returning type (char*). The trend seems to be to
417 declare it as "int vsprintf()".
420 This variable conditionally defines the HAS_CHOWN symbol, which
421 indicates to the C program that the chown() routine is available.
423 d_chroot (d_chroot.U):
424 This variable conditionally defines the HAS_CHROOT symbol, which
425 indicates to the C program that the chroot() routine is available.
427 d_chsize (d_chsize.U):
428 This variable conditionally defines the CHSIZE symbol, which
429 indicates to the C program that the chsize() routine is available
430 to truncate files. You might need a -lx to get this routine.
432 d_closedir (d_closedir.U):
433 This variable conditionally defines HAS_CLOSEDIR if closedir() is
436 d_cmsghdr_s (d_cmsghdr_s.U):
437 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
438 which indicates that the struct cmsghdr is supported.
441 This variable conditionally defines the HASCONST symbol, which
442 indicates to the C program that this C compiler knows about the
446 This variable conditionally defines the CRYPT symbol, which
447 indicates to the C program that the crypt() routine is available
448 to encrypt passwords and the like.
451 This variable conditionally defines the CSH symbol, which
452 indicates to the C program that the C-shell exists.
454 d_cuserid (d_cuserid.U):
455 This variable conditionally defines the HAS_CUSERID symbol, which
456 indicates to the C program that the cuserid() routine is available
457 to get character login names.
459 d_dbl_dig (d_dbl_dig.U):
460 This variable conditionally defines d_dbl_dig if this system's
461 header files provide DBL_DIG, which is the number of significant
462 digits in a double precision number.
464 d_difftime (d_difftime.U):
465 This variable conditionally defines the HAS_DIFFTIME symbol, which
466 indicates to the C program that the difftime() routine is available.
468 d_dirnamlen (i_dirent.U):
469 This variable conditionally defines DIRNAMLEN, which indicates
470 to the C program that the length of directory entry names is
471 provided by a d_namelen field.
473 d_dlerror (d_dlerror.U):
474 This variable conditionally defines the HAS_DLERROR symbol, which
475 indicates to the C program that the dlerror() routine is available.
477 d_dlopen (d_dlopen.U):
478 This variable conditionally defines the HAS_DLOPEN symbol, which
479 indicates to the C program that the dlopen() routine is available.
481 d_dlsymun (d_dlsymun.U):
482 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
483 indicates that we need to prepend an underscore to the symbol
484 name before calling dlsym().
486 d_dosuid (d_dosuid.U):
487 This variable conditionally defines the symbol DOSUID, which
488 tells the C program that it should insert setuid emulation code
489 on hosts which have setuid #! scripts disabled.
491 d_drand48proto (d_drand48proto.U):
492 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
493 which indicates to the C program that the system provides
494 a prototype for the drand48() function. Otherwise, it is
495 up to the program to supply one.
498 This variable conditionally defines HAS_DUP2 if dup2() is
499 available to duplicate file descriptors.
501 d_eaccess (d_eaccess.U):
502 This variable conditionally defines the HAS_EACCESS symbol, which
503 indicates to the C program that the eaccess() routine is available.
505 d_endgrent (d_endgrent.U):
506 This variable conditionally defines the HAS_ENDGRENT symbol, which
507 indicates to the C program that the endgrent() routine is available
508 for sequential access of the group database.
510 d_endhent (d_endhent.U):
511 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
512 available to close whatever was being used for host queries.
514 d_endnent (d_endnent.U):
515 This variable conditionally defines HAS_ENDNETENT if endnetent() is
516 available to close whatever was being used for network queries.
518 d_endpent (d_endpent.U):
519 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
520 available to close whatever was being used for protocol queries.
522 d_endpwent (d_endpwent.U):
523 This variable conditionally defines the HAS_ENDPWENT symbol, which
524 indicates to the C program that the endpwent() routine is available
525 for sequential access of the passwd database.
527 d_endsent (d_endsent.U):
528 This variable conditionally defines HAS_ENDSERVENT if endservent() is
529 available to close whatever was being used for service queries.
531 d_eofnblk (nblock_io.U):
532 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
533 when reading from a non-blocking I/O source.
536 This variable conditionally defines the symbols EUNICE and VAX, which
537 alerts the C program that it must deal with ideosyncracies of VMS.
539 d_fchmod (d_fchmod.U):
540 This variable conditionally defines the HAS_FCHMOD symbol, which
541 indicates to the C program that the fchmod() routine is available
542 to change mode of opened files.
544 d_fchown (d_fchown.U):
545 This variable conditionally defines the HAS_FCHOWN symbol, which
546 indicates to the C program that the fchown() routine is available
547 to change ownership of opened files.
550 This variable conditionally defines the HAS_FCNTL symbol, and indicates
551 whether the fcntl() function exists
553 d_fcntl_can_lock (d_fcntl_can_lock.U):
554 This variable conditionally defines the FCNTL_CAN_LOCK symbol
555 and indicates whether file locking with fcntl() works.
557 d_fd_macros (d_fd_set.U):
558 This variable contains the eventual value of the HAS_FD_MACROS symbol,
559 which indicates if your C compiler knows about the macros which
560 manipulate an fd_set.
562 d_fd_set (d_fd_set.U):
563 This variable contains the eventual value of the HAS_FD_SET symbol,
564 which indicates if your C compiler knows about the fd_set typedef.
566 d_fds_bits (d_fd_set.U):
567 This variable contains the eventual value of the HAS_FDS_BITS symbol,
568 which indicates if your fd_set typedef contains the fds_bits member.
569 If you have an fd_set typedef, but the dweebs who installed it did
570 a half-fast job and neglected to provide the macros to manipulate
571 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
573 d_fgetpos (d_fgetpos.U):
574 This variable conditionally defines HAS_FGETPOS if fgetpos() is
575 available to get the file position indicator.
577 d_flexfnam (d_flexfnam.U):
578 This variable conditionally defines the FLEXFILENAMES symbol, which
579 indicates that the system supports filenames longer than 14 characters.
582 This variable conditionally defines HAS_FLOCK if flock() is
583 available to do file locking.
586 This variable conditionally defines the HAS_FORK symbol, which
587 indicates to the C program that the fork() routine is available.
589 d_fpathconf (d_pathconf.U):
590 This variable conditionally defines the HAS_FPATHCONF symbol, which
591 indicates to the C program that the pathconf() routine is available
592 to determine file-system related limits and options associated
593 with a given open file descriptor.
595 d_fpos64_t (d_fpos64_t.U):
596 This symbol will be defined if the C compiler supports fpos64_t.
598 d_frexpl (d_frexpl.U):
599 This variable conditionally defines the HAS_FREXPL symbol, which
600 indicates to the C program that the frexpl() routine is available.
602 d_fs_data_s (d_fs_data_s.U):
603 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
604 which indicates that the struct fs_data is supported.
606 d_fseeko (d_fseeko.U):
607 This variable conditionally defines the HAS_FSEEKO symbol, which
608 indicates to the C program that the fseeko() routine is available.
610 d_fsetpos (d_fsetpos.U):
611 This variable conditionally defines HAS_FSETPOS if fsetpos() is
612 available to set the file position indicator.
614 d_fstatfs (d_fstatfs.U):
615 This variable conditionally defines the HAS_FSTATFS symbol, which
616 indicates to the C program that the fstatfs() routine is available.
618 d_fstatvfs (d_statvfs.U):
619 This variable conditionally defines the HAS_FSTATVFS symbol, which
620 indicates to the C program that the fstatvfs() routine is available.
623 This variable conditionally defines the HAS_FSYNC symbol, which
624 indicates to the C program that the fsync() routine is available.
626 d_ftello (d_ftello.U):
627 This variable conditionally defines the HAS_FTELLO symbol, which
628 indicates to the C program that the ftello() routine is available.
631 This variable conditionally defines the HAS_FTIME symbol, which indicates
632 that the ftime() routine exists. The ftime() routine is basically
633 a sub-second accuracy clock.
635 d_Gconvert (d_gconvert.U):
636 This variable holds what Gconvert is defined as to convert
637 floating point numbers into strings. It could be 'gconvert'
638 or a more complex macro emulating gconvert with gcvt() or sprintf.
640 d_Gconvert='gconvert((x),(n),(t),(b))'
641 d_Gconvert='gcvt((x),(n),(b))'
642 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
644 d_getcwd (d_getcwd.U):
645 This variable conditionally defines the HAS_GETCWD symbol, which
646 indicates to the C program that the getcwd() routine is available
647 to get the current working directory.
649 d_getespwnam (d_getespwnam.U):
650 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
651 available to retrieve enchanced (shadow) password entries by name.
653 d_getfsstat (d_getfsstat.U):
654 This variable conditionally defines the HAS_GETFSSTAT symbol, which
655 indicates to the C program that the getfsstat() routine is available.
657 d_getgrent (d_getgrent.U):
658 This variable conditionally defines the HAS_GETGRENT symbol, which
659 indicates to the C program that the getgrent() routine is available
660 for sequential access of the group database.
662 d_getgrps (d_getgrps.U):
663 This variable conditionally defines the HAS_GETGROUPS symbol, which
664 indicates to the C program that the getgroups() routine is available
665 to get the list of process groups.
667 d_gethbyaddr (d_gethbyad.U):
668 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
669 indicates to the C program that the gethostbyaddr() routine is available
670 to look up hosts by their IP addresses.
672 d_gethbyname (d_gethbynm.U):
673 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
674 indicates to the C program that the gethostbyname() routine is available
675 to look up host names in some data base or other.
677 d_gethent (d_gethent.U):
678 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
679 available to look up host names in some data base or another.
681 d_gethname (d_gethname.U):
682 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
683 indicates to the C program that the gethostname() routine may be
684 used to derive the host name.
686 d_gethostprotos (d_gethostprotos.U):
687 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
688 which indicates to the C program that <netdb.h> supplies
689 prototypes for the various gethost*() functions.
690 See also netdbtype.U for probing for various netdb types.
692 d_getitimer (d_getitimer.U):
693 This variable conditionally defines the HAS_GETITIMER symbol, which
694 indicates to the C program that the getitimer() routine is available.
696 d_getlogin (d_getlogin.U):
697 This variable conditionally defines the HAS_GETLOGIN symbol, which
698 indicates to the C program that the getlogin() routine is available
699 to get the login name.
701 d_getmnt (d_getmnt.U):
702 This variable conditionally defines the HAS_GETMNT symbol, which
703 indicates to the C program that the getmnt() routine is available
704 to retrieve one or more mount info blocks by filename.
706 d_getmntent (d_getmntent.U):
707 This variable conditionally defines the HAS_GETMNTENT symbol, which
708 indicates to the C program that the getmntent() routine is available
709 to iterate through mounted files to get their mount info.
711 d_getnbyaddr (d_getnbyad.U):
712 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
713 indicates to the C program that the getnetbyaddr() routine is available
714 to look up networks by their IP addresses.
716 d_getnbyname (d_getnbynm.U):
717 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
718 indicates to the C program that the getnetbyname() routine is available
719 to look up networks by their names.
721 d_getnent (d_getnent.U):
722 This variable conditionally defines HAS_GETNETENT if getnetent() is
723 available to look up network names in some data base or another.
725 d_getnetprotos (d_getnetprotos.U):
726 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
727 which indicates to the C program that <netdb.h> supplies
728 prototypes for the various getnet*() functions.
729 See also netdbtype.U for probing for various netdb types.
731 d_getpagsz (d_getpagsz.U):
732 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
733 is available to get the system page size.
735 d_getpbyname (d_getprotby.U):
736 This variable conditionally defines the HAS_GETPROTOBYNAME
737 symbol, which indicates to the C program that the
738 getprotobyname() routine is available to look up protocols
741 d_getpbynumber (d_getprotby.U):
742 This variable conditionally defines the HAS_GETPROTOBYNUMBER
743 symbol, which indicates to the C program that the
744 getprotobynumber() routine is available to look up protocols
747 d_getpent (d_getpent.U):
748 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
749 available to look up protocols in some data base or another.
751 d_getpgid (d_getpgid.U):
752 This variable conditionally defines the HAS_GETPGID symbol, which
753 indicates to the C program that the getpgid(pid) function
754 is available to get the process group id.
756 d_getpgrp2 (d_getpgrp2.U):
757 This variable conditionally defines the HAS_GETPGRP2 symbol, which
758 indicates to the C program that the getpgrp2() (as in DG/UX) routine
759 is available to get the current process group.
761 d_getpgrp (d_getpgrp.U):
762 This variable conditionally defines HAS_GETPGRP if getpgrp() is
763 available to get the current process group.
765 d_getppid (d_getppid.U):
766 This variable conditionally defines the HAS_GETPPID symbol, which
767 indicates to the C program that the getppid() routine is available
768 to get the parent process ID.
770 d_getprior (d_getprior.U):
771 This variable conditionally defines HAS_GETPRIORITY if getpriority()
772 is available to get a process's priority.
774 d_getprotoprotos (d_getprotoprotos.U):
775 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
776 which indicates to the C program that <netdb.h> supplies
777 prototypes for the various getproto*() functions.
778 See also netdbtype.U for probing for various netdb types.
780 d_getprpwnam (d_getprpwnam.U):
781 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
782 available to retrieve protected (shadow) password entries by name.
784 d_getpwent (d_getpwent.U):
785 This variable conditionally defines the HAS_GETPWENT symbol, which
786 indicates to the C program that the getpwent() routine is available
787 for sequential access of the passwd database.
789 d_getsbyname (d_getsrvby.U):
790 This variable conditionally defines the HAS_GETSERVBYNAME
791 symbol, which indicates to the C program that the
792 getservbyname() routine is available to look up services
795 d_getsbyport (d_getsrvby.U):
796 This variable conditionally defines the HAS_GETSERVBYPORT
797 symbol, which indicates to the C program that the
798 getservbyport() routine is available to look up services
801 d_getsent (d_getsent.U):
802 This variable conditionally defines HAS_GETSERVENT if getservent() is
803 available to look up network services in some data base or another.
805 d_getservprotos (d_getservprotos.U):
806 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
807 which indicates to the C program that <netdb.h> supplies
808 prototypes for the various getserv*() functions.
809 See also netdbtype.U for probing for various netdb types.
811 d_getspnam (d_getspnam.U):
812 This variable conditionally defines HAS_GETSPNAM if getspnam() is
813 available to retrieve SysV shadow password entries by name.
815 d_gettimeod (d_ftime.U):
816 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
817 indicates that the gettimeofday() system call exists (to obtain a
818 sub-second accuracy clock). You should probably include <sys/resource.h>.
820 d_gnulibc (d_gnulibc.U):
821 Defined if we're dealing with the GNU C Library.
823 d_grpasswd (i_grp.U):
824 This variable conditionally defines GRPASSWD, which indicates
825 that struct group in <grp.h> contains gr_passwd.
827 d_hasmntopt (d_hasmntopt.U):
828 This variable conditionally defines the HAS_HASMNTOPT symbol, which
829 indicates to the C program that the hasmntopt() routine is available
830 to query the mount options of file systems.
833 This variable conditionally defines HAS_HTONL if htonl() and its
834 friends are available to do network order byte swapping.
837 This variable conditionally defines the HAS_ICONV symbol, which
838 indicates to the C program that the iconv() routine is available.
840 d_index (d_strchr.U):
841 This variable conditionally defines HAS_INDEX if index() and
842 rindex() are available for string searching.
844 d_inetaton (d_inetaton.U):
845 This variable conditionally defines the HAS_INET_ATON symbol, which
846 indicates to the C program that the inet_aton() function is available
847 to parse IP address "dotted-quad" strings.
849 d_int64_t (d_int64_t.U):
850 This symbol will be defined if the C compiler supports int64_t.
852 d_isascii (d_isascii.U):
853 This variable conditionally defines the HAS_ISASCII constant,
854 which indicates to the C program that isascii() is available.
857 This variable conditionally defines the HAS_ISNAN symbol, which
858 indicates to the C program that the isnan() routine is available.
860 d_isnanl (d_isnanl.U):
861 This variable conditionally defines the HAS_ISNANL symbol, which
862 indicates to the C program that the isnanl() routine is available.
864 d_killpg (d_killpg.U):
865 This variable conditionally defines the HAS_KILLPG symbol, which
866 indicates to the C program that the killpg() routine is available
867 to kill process groups.
869 d_lchown (d_lchown.U):
870 This variable conditionally defines the HAS_LCHOWN symbol, which
871 indicates to the C program that the lchown() routine is available
872 to operate on a symbolic link (instead of following the link).
874 d_ldbl_dig (d_ldbl_dig.U):
875 This variable conditionally defines d_ldbl_dig if this system's
876 header files provide LDBL_DIG, which is the number of significant
877 digits in a long double precision number.
880 This variable conditionally defines HAS_LINK if link() is
881 available to create hard links.
883 d_locconv (d_locconv.U):
884 This variable conditionally defines HAS_LOCALECONV if localeconv() is
885 available for numeric and monetary formatting conventions.
888 This variable conditionally defines HAS_LOCKF if lockf() is
889 available to do file locking.
891 d_longdbl (d_longdbl.U):
892 This variable conditionally defines HAS_LONG_DOUBLE if
893 the long double type is supported.
895 d_longlong (d_longlong.U):
896 This variable conditionally defines HAS_LONG_LONG if
897 the long long type is supported.
899 d_lseekproto (d_lseekproto.U):
900 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
901 which indicates to the C program that the system provides
902 a prototype for the lseek() function. Otherwise, it is
903 up to the program to supply one.
906 This variable conditionally defines HAS_LSTAT if lstat() is
907 available to do file stats on symbolic links.
909 d_madvise (d_madvise.U):
910 This variable conditionally defines HAS_MADVISE if madvise() is
911 available to map a file into memory.
914 This variable conditionally defines the HAS_MBLEN symbol, which
915 indicates to the C program that the mblen() routine is available
916 to find the number of bytes in a multibye character.
918 d_mbstowcs (d_mbstowcs.U):
919 This variable conditionally defines the HAS_MBSTOWCS symbol, which
920 indicates to the C program that the mbstowcs() routine is available
921 to convert a multibyte string into a wide character string.
923 d_mbtowc (d_mbtowc.U):
924 This variable conditionally defines the HAS_MBTOWC symbol, which
925 indicates to the C program that the mbtowc() routine is available
926 to convert multibyte to a wide character.
928 d_memchr (d_memchr.U):
929 This variable conditionally defines the HAS_MEMCHR symbol, which
930 indicates to the C program that the memchr() routine is available
931 to locate characters within a C string.
933 d_memcmp (d_memcmp.U):
934 This variable conditionally defines the HAS_MEMCMP symbol, which
935 indicates to the C program that the memcmp() routine is available
936 to compare blocks of memory.
938 d_memcpy (d_memcpy.U):
939 This variable conditionally defines the HAS_MEMCPY symbol, which
940 indicates to the C program that the memcpy() routine is available
941 to copy blocks of memory.
943 d_memmove (d_memmove.U):
944 This variable conditionally defines the HAS_MEMMOVE symbol, which
945 indicates to the C program that the memmove() routine is available
946 to copy potentatially overlapping blocks of memory.
948 d_memset (d_memset.U):
949 This variable conditionally defines the HAS_MEMSET symbol, which
950 indicates to the C program that the memset() routine is available
951 to set blocks of memory.
954 This variable conditionally defines the HAS_MKDIR symbol, which
955 indicates to the C program that the mkdir() routine is available
956 to create directories..
958 d_mkdtemp (d_mkdtemp.U):
959 This variable conditionally defines the HAS_MKDTEMP symbol, which
960 indicates to the C program that the mkdtemp() routine is available
961 to exclusively create a uniquely named temporary directory.
963 d_mkfifo (d_mkfifo.U):
964 This variable conditionally defines the HAS_MKFIFO symbol, which
965 indicates to the C program that the mkfifo() routine is available.
967 d_mkstemp (d_mkstemp.U):
968 This variable conditionally defines the HAS_MKSTEMP symbol, which
969 indicates to the C program that the mkstemp() routine is available
970 to exclusively create and open a uniquely named temporary file.
972 d_mkstemps (d_mkstemps.U):
973 This variable conditionally defines the HAS_MKSTEMPS symbol, which
974 indicates to the C program that the mkstemps() routine is available
975 to exclusively create and open a uniquely named (with a suffix)
978 d_mktime (d_mktime.U):
979 This variable conditionally defines the HAS_MKTIME symbol, which
980 indicates to the C program that the mktime() routine is available.
983 This variable conditionally defines HAS_MMAP if mmap() is
984 available to map a file into memory.
987 This variable conditionally defines the HAS_MODFL symbol, which
988 indicates to the C program that the modfl() routine is available.
990 d_mprotect (d_mprotect.U):
991 This variable conditionally defines HAS_MPROTECT if mprotect() is
992 available to modify the access protection of a memory mapped file.
995 This variable conditionally defines the HAS_MSG symbol, which
996 indicates that the entire msg*(2) library is present.
998 d_msg_ctrunc (d_socket.U):
999 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1000 which indicates that the MSG_CTRUNC is available. #ifdef is
1001 not enough because it may be an enum, glibc has been known to do this.
1003 d_msg_dontroute (d_socket.U):
1004 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1005 which indicates that the MSG_DONTROUTE is available. #ifdef is
1006 not enough because it may be an enum, glibc has been known to do this.
1008 d_msg_oob (d_socket.U):
1009 This variable conditionally defines the HAS_MSG_OOB symbol,
1010 which indicates that the MSG_OOB is available. #ifdef is
1011 not enough because it may be an enum, glibc has been known to do this.
1013 d_msg_peek (d_socket.U):
1014 This variable conditionally defines the HAS_MSG_PEEK symbol,
1015 which indicates that the MSG_PEEK is available. #ifdef is
1016 not enough because it may be an enum, glibc has been known to do this.
1018 d_msg_proxy (d_socket.U):
1019 This variable conditionally defines the HAS_MSG_PROXY symbol,
1020 which indicates that the MSG_PROXY is available. #ifdef is
1021 not enough because it may be an enum, glibc has been known to do this.
1023 d_msgctl (d_msgctl.U):
1024 This variable conditionally defines the HAS_MSGCTL symbol, which
1025 indicates to the C program that the msgctl() routine is available.
1027 d_msgget (d_msgget.U):
1028 This variable conditionally defines the HAS_MSGGET symbol, which
1029 indicates to the C program that the msgget() routine is available.
1031 d_msghdr_s (d_msghdr_s.U):
1032 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1033 which indicates that the struct msghdr is supported.
1035 d_msgrcv (d_msgrcv.U):
1036 This variable conditionally defines the HAS_MSGRCV symbol, which
1037 indicates to the C program that the msgrcv() routine is available.
1039 d_msgsnd (d_msgsnd.U):
1040 This variable conditionally defines the HAS_MSGSND symbol, which
1041 indicates to the C program that the msgsnd() routine is available.
1043 d_msync (d_msync.U):
1044 This variable conditionally defines HAS_MSYNC if msync() is
1045 available to synchronize a mapped file.
1047 d_munmap (d_munmap.U):
1048 This variable conditionally defines HAS_MUNMAP if munmap() is
1049 available to unmap a region mapped by mmap().
1051 d_mymalloc (mallocsrc.U):
1052 This variable conditionally defines MYMALLOC in case other parts
1053 of the source want to take special action if MYMALLOC is used.
1054 This may include different sorts of profiling or error detection.
1057 This variable conditionally defines the HAS_NICE symbol, which
1058 indicates to the C program that the nice() routine is available.
1060 d_nv_preserves_uv (perlxv.U):
1061 This variable indicates whether a variable of type nvtype
1062 can preserve all the bits a variable of type uvtype.
1064 d_nv_preserves_uv_bits (perlxv.U):
1065 This variable indicates how many of bits type uvtype
1066 a variable nvtype can preserve.
1068 d_off64_t (d_off64_t.U):
1069 This symbol will be defined if the C compiler supports off64_t.
1071 d_old_pthread_create_joinable (d_pthrattrj.U):
1072 This variable conditionally defines pthread_create_joinable.
1073 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1075 d_oldpthreads (usethreads.U):
1076 This variable conditionally defines the OLD_PTHREADS_API symbol,
1077 and indicates that Perl should be built to use the old
1078 draft POSIX threads API. This is only potentially meaningful if
1081 d_oldsock (d_socket.U):
1082 This variable conditionally defines the OLDSOCKET symbol, which
1083 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1085 d_open3 (d_open3.U):
1086 This variable conditionally defines the HAS_OPEN3 manifest constant,
1087 which indicates to the C program that the 3 argument version of
1088 the open(2) function is available.
1090 d_pathconf (d_pathconf.U):
1091 This variable conditionally defines the HAS_PATHCONF symbol, which
1092 indicates to the C program that the pathconf() routine is available
1093 to determine file-system related limits and options associated
1094 with a given filename.
1096 d_pause (d_pause.U):
1097 This variable conditionally defines the HAS_PAUSE symbol, which
1098 indicates to the C program that the pause() routine is available
1099 to suspend a process until a signal is received.
1101 d_perl_otherlibdirs (otherlibdirs.U):
1102 This variable conditionally defines PERL_OTHERLIBDIRS, which
1103 contains a colon-separated set of paths for the perl binary to
1104 include in @INC. See also otherlibdirs.
1106 d_phostname (d_gethname.U):
1107 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1108 contains the shell command which, when fed to popen(), may be
1109 used to derive the host name.
1112 This variable conditionally defines the HAS_PIPE symbol, which
1113 indicates to the C program that the pipe() routine is available
1114 to create an inter-process channel.
1117 This variable conditionally defines the HAS_POLL symbol, which
1118 indicates to the C program that the poll() routine is available
1119 to poll active file descriptors.
1121 d_portable (d_portable.U):
1122 This variable conditionally defines the PORTABLE symbol, which
1123 indicates to the C program that it should not assume that it is
1124 running on the machine it was compiled on.
1126 d_PRId64 (quadfio.U):
1127 This variable conditionally defines the PERL_PRId64 symbol, which
1128 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1130 d_PRIeldbl (longdblfio.U):
1131 This variable conditionally defines the PERL_PRIfldbl symbol, which
1132 indiciates that stdio has a symbol to print long doubles.
1134 d_PRIEUldbl (longdblfio.U):
1135 This variable conditionally defines the PERL_PRIfldbl symbol, which
1136 indiciates that stdio has a symbol to print long doubles.
1137 The 'U' in the name is to separate this from d_PRIeldbl so that even
1138 case-blind systems can see the difference.
1140 d_PRIfldbl (longdblfio.U):
1141 This variable conditionally defines the PERL_PRIfldbl symbol, which
1142 indiciates that stdio has a symbol to print long doubles.
1144 d_PRIFUldbl (longdblfio.U):
1145 This variable conditionally defines the PERL_PRIfldbl symbol, which
1146 indiciates that stdio has a symbol to print long doubles.
1147 The 'U' in the name is to separate this from d_PRIfldbl so that even
1148 case-blind systems can see the difference.
1150 d_PRIgldbl (longdblfio.U):
1151 This variable conditionally defines the PERL_PRIfldbl symbol, which
1152 indiciates that stdio has a symbol to print long doubles.
1154 d_PRIGUldbl (longdblfio.U):
1155 This variable conditionally defines the PERL_PRIfldbl symbol, which
1156 indiciates that stdio has a symbol to print long doubles.
1157 The 'U' in the name is to separate this from d_PRIgldbl so that even
1158 case-blind systems can see the difference.
1160 d_PRIi64 (quadfio.U):
1161 This variable conditionally defines the PERL_PRIi64 symbol, which
1162 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1164 d_PRIo64 (quadfio.U):
1165 This variable conditionally defines the PERL_PRIo64 symbol, which
1166 indiciates that stdio has a symbol to print 64-bit octal numbers.
1168 d_PRIu64 (quadfio.U):
1169 This variable conditionally defines the PERL_PRIu64 symbol, which
1170 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1173 d_PRIx64 (quadfio.U):
1174 This variable conditionally defines the PERL_PRIx64 symbol, which
1175 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1177 d_PRIXU64 (quadfio.U):
1178 This variable conditionally defines the PERL_PRIXU64 symbol, which
1179 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1180 The 'U' in the name is to separate this from d_PRIx64 so that even
1181 case-blind systems can see the difference.
1183 d_pthread_yield (d_pthread_y.U):
1184 This variable conditionally defines the HAS_PTHREAD_YIELD
1185 symbol if the pthread_yield routine is available to yield
1186 the execution of the current thread.
1189 This variable conditionally defines PWAGE, which indicates
1190 that struct passwd contains pw_age.
1192 d_pwchange (i_pwd.U):
1193 This variable conditionally defines PWCHANGE, which indicates
1194 that struct passwd contains pw_change.
1196 d_pwclass (i_pwd.U):
1197 This variable conditionally defines PWCLASS, which indicates
1198 that struct passwd contains pw_class.
1200 d_pwcomment (i_pwd.U):
1201 This variable conditionally defines PWCOMMENT, which indicates
1202 that struct passwd contains pw_comment.
1204 d_pwexpire (i_pwd.U):
1205 This variable conditionally defines PWEXPIRE, which indicates
1206 that struct passwd contains pw_expire.
1208 d_pwgecos (i_pwd.U):
1209 This variable conditionally defines PWGECOS, which indicates
1210 that struct passwd contains pw_gecos.
1212 d_pwpasswd (i_pwd.U):
1213 This variable conditionally defines PWPASSWD, which indicates
1214 that struct passwd contains pw_passwd.
1216 d_pwquota (i_pwd.U):
1217 This variable conditionally defines PWQUOTA, which indicates
1218 that struct passwd contains pw_quota.
1220 d_qgcvt (d_qgcvt.U):
1221 This variable conditionally defines the HAS_QGCVT symbol, which
1222 indicates to the C program that the qgcvt() routine is available.
1224 d_quad (quadtype.U):
1225 This variable, if defined, tells that there's a 64-bit integer type,
1228 d_readdir (d_readdir.U):
1229 This variable conditionally defines HAS_READDIR if readdir() is
1230 available to read directory entries.
1232 d_readlink (d_readlink.U):
1233 This variable conditionally defines the HAS_READLINK symbol, which
1234 indicates to the C program that the readlink() routine is available
1235 to read the value of a symbolic link.
1237 d_readv (d_readv.U):
1238 This variable conditionally defines the HAS_READV symbol, which
1239 indicates to the C program that the readv() routine is available.
1241 d_recvmsg (d_recvmsg.U):
1242 This variable conditionally defines the HAS_RECVMSG symbol, which
1243 indicates to the C program that the recvmsg() routine is available.
1245 d_rename (d_rename.U):
1246 This variable conditionally defines the HAS_RENAME symbol, which
1247 indicates to the C program that the rename() routine is available
1250 d_rewinddir (d_readdir.U):
1251 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1254 d_rmdir (d_rmdir.U):
1255 This variable conditionally defines HAS_RMDIR if rmdir() is
1256 available to remove directories.
1258 d_safebcpy (d_safebcpy.U):
1259 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1260 the bcopy() routine can do overlapping copies.
1262 d_safemcpy (d_safemcpy.U):
1263 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1264 the memcpy() routine can do overlapping copies.
1266 d_sanemcmp (d_sanemcmp.U):
1267 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1268 the memcpy() routine is available and can be used to compare relative
1269 magnitudes of chars with their high bits set.
1271 d_sbrkproto (d_sbrkproto.U):
1272 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1273 which indicates to the C program that the system provides
1274 a prototype for the sbrk() function. Otherwise, it is
1275 up to the program to supply one.
1277 d_sched_yield (d_pthread_y.U):
1278 This variable conditionally defines the HAS_SCHED_YIELD
1279 symbol if the sched_yield routine is available to yield
1280 the execution of the current thread.
1282 d_scm_rights (d_socket.U):
1283 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1284 which indicates that the SCM_RIGHTS is available. #ifdef is
1285 not enough because it may be an enum, glibc has been known to do this.
1287 d_SCNfldbl (longdblfio.U):
1288 This variable conditionally defines the PERL_PRIfldbl symbol, which
1289 indiciates that stdio has a symbol to scan long doubles.
1291 d_seekdir (d_readdir.U):
1292 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1295 d_select (d_select.U):
1296 This variable conditionally defines HAS_SELECT if select() is
1297 available to select active file descriptors. A <sys/time.h>
1298 inclusion may be necessary for the timeout field.
1301 This variable conditionally defines the HAS_SEM symbol, which
1302 indicates that the entire sem*(2) library is present.
1304 d_semctl (d_semctl.U):
1305 This variable conditionally defines the HAS_SEMCTL symbol, which
1306 indicates to the C program that the semctl() routine is available.
1308 d_semctl_semid_ds (d_union_semun.U):
1309 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1310 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1312 d_semctl_semun (d_union_semun.U):
1313 This variable conditionally defines USE_SEMCTL_SEMUN, which
1314 indicates that union semun is to be used for semctl IPC_STAT.
1316 d_semget (d_semget.U):
1317 This variable conditionally defines the HAS_SEMGET symbol, which
1318 indicates to the C program that the semget() routine is available.
1320 d_semop (d_semop.U):
1321 This variable conditionally defines the HAS_SEMOP symbol, which
1322 indicates to the C program that the semop() routine is available.
1324 d_sendmsg (d_sendmsg.U):
1325 This variable conditionally defines the HAS_SENDMSG symbol, which
1326 indicates to the C program that the sendmsg() routine is available.
1328 d_setegid (d_setegid.U):
1329 This variable conditionally defines the HAS_SETEGID symbol, which
1330 indicates to the C program that the setegid() routine is available
1331 to change the effective gid of the current program.
1333 d_seteuid (d_seteuid.U):
1334 This variable conditionally defines the HAS_SETEUID symbol, which
1335 indicates to the C program that the seteuid() routine is available
1336 to change the effective uid of the current program.
1338 d_setgrent (d_setgrent.U):
1339 This variable conditionally defines the HAS_SETGRENT symbol, which
1340 indicates to the C program that the setgrent() routine is available
1341 for initializing sequential access to the group database.
1343 d_setgrps (d_setgrps.U):
1344 This variable conditionally defines the HAS_SETGROUPS symbol, which
1345 indicates to the C program that the setgroups() routine is available
1346 to set the list of process groups.
1348 d_sethent (d_sethent.U):
1349 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1352 d_setitimer (d_setitimer.U):
1353 This variable conditionally defines the HAS_SETITIMER symbol, which
1354 indicates to the C program that the setitimer() routine is available.
1356 d_setlinebuf (d_setlnbuf.U):
1357 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1358 indicates to the C program that the setlinebuf() routine is available
1359 to change stderr or stdout from block-buffered or unbuffered to a
1362 d_setlocale (d_setlocale.U):
1363 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1364 available to handle locale-specific ctype implementations.
1366 d_setnent (d_setnent.U):
1367 This variable conditionally defines HAS_SETNETENT if setnetent() is
1370 d_setpent (d_setpent.U):
1371 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1374 d_setpgid (d_setpgid.U):
1375 This variable conditionally defines the HAS_SETPGID symbol if the
1376 setpgid(pid, gpid) function is available to set process group ID.
1378 d_setpgrp2 (d_setpgrp2.U):
1379 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1380 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1381 is available to set the current process group.
1383 d_setpgrp (d_setpgrp.U):
1384 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1385 available to set the current process group.
1387 d_setprior (d_setprior.U):
1388 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1389 is available to set a process's priority.
1391 d_setproctitle (d_setproctitle.U):
1392 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1393 which indicates to the C program that the setproctitle() routine
1396 d_setpwent (d_setpwent.U):
1397 This variable conditionally defines the HAS_SETPWENT symbol, which
1398 indicates to the C program that the setpwent() routine is available
1399 for initializing sequential access to the passwd database.
1401 d_setregid (d_setregid.U):
1402 This variable conditionally defines HAS_SETREGID if setregid() is
1403 available to change the real and effective gid of the current
1406 d_setresgid (d_setregid.U):
1407 This variable conditionally defines HAS_SETRESGID if setresgid() is
1408 available to change the real, effective and saved gid of the current
1411 d_setresuid (d_setreuid.U):
1412 This variable conditionally defines HAS_SETREUID if setresuid() is
1413 available to change the real, effective and saved uid of the current
1416 d_setreuid (d_setreuid.U):
1417 This variable conditionally defines HAS_SETREUID if setreuid() is
1418 available to change the real and effective uid of the current
1421 d_setrgid (d_setrgid.U):
1422 This variable conditionally defines the HAS_SETRGID symbol, which
1423 indicates to the C program that the setrgid() routine is available
1424 to change the real gid of the current program.
1426 d_setruid (d_setruid.U):
1427 This variable conditionally defines the HAS_SETRUID symbol, which
1428 indicates to the C program that the setruid() routine is available
1429 to change the real uid of the current program.
1431 d_setsent (d_setsent.U):
1432 This variable conditionally defines HAS_SETSERVENT if setservent() is
1435 d_setsid (d_setsid.U):
1436 This variable conditionally defines HAS_SETSID if setsid() is
1437 available to set the process group ID.
1439 d_setvbuf (d_setvbuf.U):
1440 This variable conditionally defines the HAS_SETVBUF symbol, which
1441 indicates to the C program that the setvbuf() routine is available
1442 to change buffering on an open stdio stream.
1445 This variable conditionally defines the USE_SFIO symbol,
1446 and indicates whether sfio is available (and should be used).
1449 This variable conditionally defines the HAS_SHM symbol, which
1450 indicates that the entire shm*(2) library is present.
1452 d_shmat (d_shmat.U):
1453 This variable conditionally defines the HAS_SHMAT symbol, which
1454 indicates to the C program that the shmat() routine is available.
1456 d_shmatprototype (d_shmat.U):
1457 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1458 symbol, which indicates that sys/shm.h has a prototype for
1461 d_shmctl (d_shmctl.U):
1462 This variable conditionally defines the HAS_SHMCTL symbol, which
1463 indicates to the C program that the shmctl() routine is available.
1465 d_shmdt (d_shmdt.U):
1466 This variable conditionally defines the HAS_SHMDT symbol, which
1467 indicates to the C program that the shmdt() routine is available.
1469 d_shmget (d_shmget.U):
1470 This variable conditionally defines the HAS_SHMGET symbol, which
1471 indicates to the C program that the shmget() routine is available.
1473 d_sigaction (d_sigaction.U):
1474 This variable conditionally defines the HAS_SIGACTION symbol, which
1475 indicates that the Vr4 sigaction() routine is available.
1477 d_sigprocmask (d_sigprocmask.U):
1478 This variable conditionally defines HAS_SIGPROCMASK
1479 if sigprocmask() is available to examine or change the signal mask
1480 of the calling process.
1482 d_sigsetjmp (d_sigsetjmp.U):
1483 This variable conditionally defines the HAS_SIGSETJMP symbol,
1484 which indicates that the sigsetjmp() routine is available to
1485 call setjmp() and optionally save the process's signal mask.
1487 d_sockatmark (d_sockatmark.U):
1488 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1489 indicates to the C program that the sockatmark() routine is available.
1491 d_socket (d_socket.U):
1492 This variable conditionally defines HAS_SOCKET, which indicates
1493 that the BSD socket interface is supported.
1495 d_socklen_t (d_socklen_t.U):
1496 This symbol will be defined if the C compiler supports socklen_t.
1498 d_sockpair (d_socket.U):
1499 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1500 indicates that the BSD socketpair() is supported.
1502 d_socks5_init (d_socks5_init.U):
1503 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1504 indicates to the C program that the socks5_init() routine is available.
1506 d_sqrtl (d_sqrtl.U):
1507 This variable conditionally defines the HAS_SQRTL symbol, which
1508 indicates to the C program that the sqrtl() routine is available.
1510 d_statblks (d_statblks.U):
1511 This variable conditionally defines USE_STAT_BLOCKS
1512 if this system has a stat structure declaring
1513 st_blksize and st_blocks.
1515 d_statfs_f_flags (d_statfs_f_flags.U):
1516 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1517 symbol, which indicates to struct statfs from has f_flags member.
1518 This kind of struct statfs is coming from sys/mount.h (BSD),
1519 not from sys/statfs.h (SYSV).
1521 d_statfs_s (d_statfs_s.U):
1522 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1523 which indicates that the struct statfs is supported.
1525 d_statvfs (d_statvfs.U):
1526 This variable conditionally defines the HAS_STATVFS symbol, which
1527 indicates to the C program that the statvfs() routine is available.
1529 d_stdio_cnt_lval (d_stdstdio.U):
1530 This variable conditionally defines STDIO_CNT_LVALUE if the
1531 FILE_cnt macro can be used as an lvalue.
1533 d_stdio_ptr_lval (d_stdstdio.U):
1534 This variable conditionally defines STDIO_PTR_LVALUE if the
1535 FILE_ptr macro can be used as an lvalue.
1537 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1538 This symbol is defined if using the FILE_ptr macro as an lvalue
1539 to increase the pointer by n leaves File_cnt(fp) unchanged.
1541 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1542 This symbol is defined if using the FILE_ptr macro as an lvalue
1543 to increase the pointer by n has the side effect of decreasing the
1544 value of File_cnt(fp) by n.
1546 d_stdio_stream_array (stdio_streams.U):
1547 This variable tells whether there is an array holding
1550 d_stdiobase (d_stdstdio.U):
1551 This variable conditionally defines USE_STDIO_BASE if this system
1552 has a FILE structure declaring a usable _base field (or equivalent)
1555 d_stdstdio (d_stdstdio.U):
1556 This variable conditionally defines USE_STDIO_PTR if this system
1557 has a FILE structure declaring usable _ptr and _cnt fields (or
1558 equivalent) in stdio.h.
1560 d_strchr (d_strchr.U):
1561 This variable conditionally defines HAS_STRCHR if strchr() and
1562 strrchr() are available for string searching.
1564 d_strcoll (d_strcoll.U):
1565 This variable conditionally defines HAS_STRCOLL if strcoll() is
1566 available to compare strings using collating information.
1568 d_strctcpy (d_strctcpy.U):
1569 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1570 indicates to the C program that this C compiler knows how to copy
1573 d_strerrm (d_strerror.U):
1574 This variable holds what Strerrr is defined as to translate an error
1575 code condition into an error message string. It could be 'strerror'
1576 or a more complex macro emulating strrror with sys_errlist[], or the
1577 "unknown" string when both strerror and sys_errlist are missing.
1579 d_strerror (d_strerror.U):
1580 This variable conditionally defines HAS_STRERROR if strerror() is
1581 available to translate error numbers to strings.
1583 d_strftime (d_strftime.U):
1584 This variable conditionally defines the HAS_STRFTIME symbol, which
1585 indicates to the C program that the strftime() routine is available.
1587 d_strtod (d_strtod.U):
1588 This variable conditionally defines the HAS_STRTOD symbol, which
1589 indicates to the C program that the strtod() routine is available
1590 to provide better numeric string conversion than atof().
1592 d_strtol (d_strtol.U):
1593 This variable conditionally defines the HAS_STRTOL symbol, which
1594 indicates to the C program that the strtol() routine is available
1595 to provide better numeric string conversion than atoi() and friends.
1597 d_strtold (d_strtold.U):
1598 This variable conditionally defines the HAS_STRTOLD symbol, which
1599 indicates to the C program that the strtold() routine is available.
1601 d_strtoll (d_strtoll.U):
1602 This variable conditionally defines the HAS_STRTOLL symbol, which
1603 indicates to the C program that the strtoll() routine is available.
1605 d_strtoq (d_strtoq.U):
1606 This variable conditionally defines the HAS_STRTOQ symbol, which
1607 indicates to the C program that the strtoq() routine is available.
1609 d_strtoul (d_strtoul.U):
1610 This variable conditionally defines the HAS_STRTOUL symbol, which
1611 indicates to the C program that the strtoul() routine is available
1612 to provide conversion of strings to unsigned long.
1614 d_strtoull (d_strtoull.U):
1615 This variable conditionally defines the HAS_STRTOULL symbol, which
1616 indicates to the C program that the strtoull() routine is available.
1618 d_strtouq (d_strtouq.U):
1619 This variable conditionally defines the HAS_STRTOUQ symbol, which
1620 indicates to the C program that the strtouq() routine is available.
1622 d_strxfrm (d_strxfrm.U):
1623 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1624 available to transform strings.
1626 d_suidsafe (d_dosuid.U):
1627 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1628 if setuid scripts can be secure. This test looks in /dev/fd/.
1630 d_symlink (d_symlink.U):
1631 This variable conditionally defines the HAS_SYMLINK symbol, which
1632 indicates to the C program that the symlink() routine is available
1633 to create symbolic links.
1635 d_syscall (d_syscall.U):
1636 This variable conditionally defines HAS_SYSCALL if syscall() is
1637 available call arbitrary system calls.
1639 d_sysconf (d_sysconf.U):
1640 This variable conditionally defines the HAS_SYSCONF symbol, which
1641 indicates to the C program that the sysconf() routine is available
1642 to determine system related limits and options.
1644 d_sysernlst (d_strerror.U):
1645 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1646 is available to translate error numbers to the symbolic name.
1648 d_syserrlst (d_strerror.U):
1649 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1650 available to translate error numbers to strings.
1652 d_system (d_system.U):
1653 This variable conditionally defines HAS_SYSTEM if system() is
1654 available to issue a shell command.
1656 d_tcgetpgrp (d_tcgtpgrp.U):
1657 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1658 indicates to the C program that the tcgetpgrp() routine is available.
1659 to get foreground process group ID.
1661 d_tcsetpgrp (d_tcstpgrp.U):
1662 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1663 indicates to the C program that the tcsetpgrp() routine is available
1664 to set foreground process group ID.
1666 d_telldir (d_readdir.U):
1667 This variable conditionally defines HAS_TELLDIR if telldir() is
1670 d_telldirproto (d_telldirproto.U):
1671 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1672 which indicates to the C program that the system provides
1673 a prototype for the telldir() function. Otherwise, it is
1674 up to the program to supply one.
1677 This variable conditionally defines the HAS_TIME symbol, which indicates
1678 that the time() routine exists. The time() routine is normaly
1679 provided on UNIX systems.
1681 d_times (d_times.U):
1682 This variable conditionally defines the HAS_TIMES symbol, which indicates
1683 that the times() routine exists. The times() routine is normaly
1684 provided on UNIX systems. You may have to include <sys/times.h>.
1686 d_truncate (d_truncate.U):
1687 This variable conditionally defines HAS_TRUNCATE if truncate() is
1688 available to truncate files.
1690 d_tzname (d_tzname.U):
1691 This variable conditionally defines HAS_TZNAME if tzname[] is
1692 available to access timezone names.
1694 d_u32align (d_u32align.U):
1695 This variable tells whether you must access character data
1696 through U32-aligned pointers.
1698 d_ualarm (d_ualarm.U):
1699 This variable conditionally defines the HAS_UALARM symbol, which
1700 indicates to the C program that the ualarm() routine is available.
1702 d_umask (d_umask.U):
1703 This variable conditionally defines the HAS_UMASK symbol, which
1704 indicates to the C program that the umask() routine is available.
1705 to set and get the value of the file creation mask.
1707 d_uname (d_gethname.U):
1708 This variable conditionally defines the HAS_UNAME symbol, which
1709 indicates to the C program that the uname() routine may be
1710 used to derive the host name.
1712 d_union_semun (d_union_semun.U):
1713 This variable conditionally defines HAS_UNION_SEMUN if the
1714 union semun is defined by including <sys/sem.h>.
1716 d_usleep (d_usleep.U):
1717 This variable conditionally defines HAS_USLEEP if usleep() is
1718 available to do high granularity sleeps.
1720 d_ustat (d_ustat.U):
1721 This variable conditionally defines HAS_USTAT if ustat() is
1722 available to query file system statistics by dev_t.
1724 d_vendorarch (vendorarch.U):
1725 This variable conditionally defined PERL_VENDORARCH.
1727 d_vendorbin (vendorbin.U):
1728 This variable conditionally defines PERL_VENDORBIN.
1730 d_vendorlib (vendorlib.U):
1731 This variable conditionally defines PERL_VENDORLIB.
1733 d_vfork (d_vfork.U):
1734 This variable conditionally defines the HAS_VFORK symbol, which
1735 indicates the vfork() routine is available.
1737 d_void_closedir (d_closedir.U):
1738 This variable conditionally defines VOID_CLOSEDIR if closedir()
1739 does not return a value.
1741 d_voidsig (d_voidsig.U):
1742 This variable conditionally defines VOIDSIG if this system
1743 declares "void (*signal(...))()" in signal.h. The old way was to
1744 declare it as "int (*signal(...))()".
1746 d_voidtty (i_sysioctl.U):
1747 This variable conditionally defines USE_IOCNOTTY to indicate that the
1748 ioctl() call with TIOCNOTTY should be used to void tty association.
1749 Otherwise (on USG probably), it is enough to close the standard file
1750 decriptors and do a setpgrp().
1752 d_volatile (d_volatile.U):
1753 This variable conditionally defines the HASVOLATILE symbol, which
1754 indicates to the C program that this C compiler knows about the
1755 volatile declaration.
1757 d_vprintf (d_vprintf.U):
1758 This variable conditionally defines the HAS_VPRINTF symbol, which
1759 indicates to the C program that the vprintf() routine is available
1760 to printf with a pointer to an argument list.
1762 d_wait4 (d_wait4.U):
1763 This variable conditionally defines the HAS_WAIT4 symbol, which
1764 indicates the wait4() routine is available.
1766 d_waitpid (d_waitpid.U):
1767 This variable conditionally defines HAS_WAITPID if waitpid() is
1768 available to wait for child process.
1770 d_wcstombs (d_wcstombs.U):
1771 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1772 indicates to the C program that the wcstombs() routine is available
1773 to convert wide character strings to multibyte strings.
1775 d_wctomb (d_wctomb.U):
1776 This variable conditionally defines the HAS_WCTOMB symbol, which
1777 indicates to the C program that the wctomb() routine is available
1778 to convert a wide character to a multibyte.
1780 d_writev (d_writev.U):
1781 This variable conditionally defines the HAS_WRITEV symbol, which
1782 indicates to the C program that the writev() routine is available.
1785 This variable conditionally defines the symbol XENIX, which alerts
1786 the C program that it runs under Xenix.
1789 This variable is used internally by Configure to determine the
1790 full pathname (if any) of the date program. After Configure runs,
1791 the value is reset to a plain "date" and is not useful.
1793 db_hashtype (i_db.U):
1794 This variable contains the type of the hash structure element
1795 in the <db.h> header file. In older versions of DB, it was
1796 int, while in newer ones it is u_int32_t.
1798 db_prefixtype (i_db.U):
1799 This variable contains the type of the prefix structure element
1800 in the <db.h> header file. In older versions of DB, it was
1801 int, while in newer ones it is size_t.
1803 defvoidused (voidflags.U):
1804 This variable contains the default value of the VOIDUSED symbol (15).
1806 direntrytype (i_dirent.U):
1807 This symbol is set to 'struct direct' or 'struct dirent' depending on
1808 whether dirent is available or not. You should use this pseudo type to
1809 portably declare your directory entries.
1812 This variable contains the extension that is to be used for the
1813 dynamically loaded modules that perl generaties.
1816 This variable contains the name of the dynamic loading file that
1817 will be used with the package.
1819 doublesize (doublesize.U):
1820 This variable contains the value of the DOUBLESIZE symbol, which
1821 indicates to the C program how many bytes there are in a double.
1823 drand01 (randfunc.U):
1824 Indicates the macro to be used to generate normalized
1825 random numbers. Uses randfunc, often divided by
1826 (double) (((unsigned long) 1 << randbits)) in order to
1827 normalize the result.
1828 In C programs, the macro 'Drand01' is mapped to drand01.
1830 dynamic_ext (Extensions.U):
1831 This variable holds a list of XS extension files we want to
1832 link dynamically into the package. It is used by Makefile.
1834 eagain (nblock_io.U):
1835 This variable bears the symbolic errno code set by read() when no
1836 data is present on the file and non-blocking I/O was enabled (otherwise,
1837 read() blocks naturally).
1840 This variable conditionally defines EBCDIC if this
1841 system uses EBCDIC encoding. Among other things, this
1842 means that the character ranges are not contiguous.
1846 This variable is used internally by Configure to determine the
1847 full pathname (if any) of the echo program. After Configure runs,
1848 the value is reset to a plain "echo" and is not useful.
1851 This variable is used internally by Configure to determine the
1852 full pathname (if any) of the egrep program. After Configure runs,
1853 the value is reset to a plain "egrep" and is not useful.
1856 This variable is defined but not used by Configure.
1857 The value is a plain '' and is not useful.
1860 When running under Eunice this variable contains a command which will
1861 convert a shell script to the proper form of text file for it to be
1862 executable by the shell. On other systems it is a no-op.
1865 This is an old synonym for _exe.
1868 This variable is used internally by Configure to determine the
1869 full pathname (if any) of the expr program. After Configure runs,
1870 the value is reset to a plain "expr" and is not useful.
1872 extensions (Extensions.U):
1873 This variable holds a list of all extension files (both XS and
1874 non-xs linked into the package. It is propagated to Config.pm
1875 and is typically used to test whether a particular extesion
1878 fflushall (fflushall.U):
1879 This symbol, if defined, tells that to flush
1880 all pending stdio output one must loop through all
1881 the stdio file handles stored in an array and fflush them.
1882 Note that if fflushNULL is defined, fflushall will not
1883 even be probed for and will be left undefined.
1885 fflushNULL (fflushall.U):
1886 This symbol, if defined, tells that fflush(NULL) does flush
1887 all pending stdio output.
1890 This variable is defined but not used by Configure.
1891 The value is a plain '' and is not useful.
1893 firstmakefile (Unix.U):
1894 This variable defines the first file searched by make. On unix,
1895 it is makefile (then Makefile). On case-insensitive systems,
1896 it might be something else. This is only used to deal with
1897 convoluted make depend tricks.
1900 This variable is defined but not used by Configure.
1901 The value is a plain '' and is not useful.
1903 fpossize (fpossize.U):
1904 This variable contains the size of a fpostype in bytes.
1906 fpostype (fpostype.U):
1907 This variable defines Fpos_t to be something like fpos_t, long,
1908 uint, or whatever type is used to declare file positions in libc.
1910 freetype (mallocsrc.U):
1911 This variable contains the return type of free(). It is usually
1912 void, but occasionally int.
1915 This variable contains the full pathname to 'ar', whether or
1916 not the user has specified 'portability'. This is only used
1920 This variable contains the full pathname to 'csh', whether or
1921 not the user has specified 'portability'. This is only used
1922 in the compiled C program, and we assume that all systems which
1923 can share this executable will have the same full pathname to
1926 full_sed (Loc_sed.U):
1927 This variable contains the full pathname to 'sed', whether or
1928 not the user has specified 'portability'. This is only used
1929 in the compiled C program, and we assume that all systems which
1930 can share this executable will have the same full pathname to
1933 gccosandvers (gccvers.U):
1934 If GNU cc (gcc) is used, this variable the operating system and
1935 version used to compile the gcc. It is set to '' if not gcc,
1936 or if nothing useful can be parsed as the os version.
1938 gccversion (gccvers.U):
1939 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1940 indicate whether the compiler is version 1 or 2. This is used in
1941 setting some of the default cflags. It is set to '' if not gcc.
1944 This variable contains the format string used for printing a Gid_t.
1946 gidsign (gidsign.U):
1947 This variable contains the signedness of a gidtype.
1948 1 for unsigned, -1 for signed.
1950 gidsize (gidsize.U):
1951 This variable contains the size of a gidtype in bytes.
1953 gidtype (gidtype.U):
1954 This variable defines Gid_t to be something like gid_t, int,
1955 ushort, or whatever type is used to declare the return type
1956 of getgid(). Typically, it is the type of group ids in the kernel.
1959 This variable holds the general path (space-separated) used to
1960 find libraries. It may contain directories that do not exist on
1961 this platform, libpth is the cleaned-up version.
1964 This variable is used internally by Configure to determine the
1965 full pathname (if any) of the grep program. After Configure runs,
1966 the value is reset to a plain "grep" and is not useful.
1969 This variable contains a command that produces the text of the
1970 /etc/group file. This is normally "cat /etc/group", but can be
1971 "ypcat group" when NIS is used.
1972 On some systems, such as os390, there may be no equivalent
1973 command, in which case this variable is unset.
1975 groupstype (groupstype.U):
1976 This variable defines Groups_t to be something like gid_t, int,
1977 ushort, or whatever type is used for the second argument to
1978 getgroups() and setgroups(). Usually, this is the same as
1979 gidtype (gid_t), but sometimes it isn't.
1982 This variable is used internally by Configure to determine the
1983 full pathname (if any) of the gzip program. After Configure runs,
1984 the value is reset to a plain "gzip" and is not useful.
1986 h_fcntl (h_fcntl.U):
1987 This is variable gets set in various places to tell i_fcntl that
1988 <fcntl.h> should be included.
1990 h_sysfile (h_sysfile.U):
1991 This is variable gets set in various places to tell i_sys_file that
1992 <sys/file.h> should be included.
1995 Gives the type of hints used for previous answers. May be one of
1996 "default", "recommended" or "previous".
1999 This variable contains a command that produces the text of the
2000 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2001 "ypcat hosts" when NIS is used.
2002 On some systems, such as os390, there may be no equivalent
2003 command, in which case this variable is unset.
2006 This variable is the size of an I16 in bytes.
2009 This variable contains the C type used for Perl's I16.
2012 This variable is the size of an I32 in bytes.
2015 This variable contains the C type used for Perl's I32.
2018 This variable is the size of an I64 in bytes.
2021 This variable contains the C type used for Perl's I64.
2024 This variable is the size of an I8 in bytes.
2027 This variable contains the C type used for Perl's I8.
2029 i_arpainet (i_arpainet.U):
2030 This variable conditionally defines the I_ARPA_INET symbol,
2031 and indicates whether a C program should include <arpa/inet.h>.
2033 i_bsdioctl (i_sysioctl.U):
2034 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2035 indicates to the C program that <sys/bsdioctl.h> exists and should
2039 This variable conditionally defines the I_DB symbol, and indicates
2040 whether a C program may include Berkeley's DB include file <db.h>.
2043 This variable conditionally defines the I_DBM symbol, which
2044 indicates to the C program that <dbm.h> exists and should
2047 i_dirent (i_dirent.U):
2048 This variable conditionally defines I_DIRENT, which indicates
2049 to the C program that it should include <dirent.h>.
2052 This variable conditionally defines the I_DLD symbol, which
2053 indicates to the C program that <dld.h> (GNU dynamic loading)
2054 exists and should be included.
2056 i_dlfcn (i_dlfcn.U):
2057 This variable conditionally defines the I_DLFCN symbol, which
2058 indicates to the C program that <dlfcn.h> exists and should
2061 i_fcntl (i_fcntl.U):
2062 This variable controls the value of I_FCNTL (which tells
2063 the C program to include <fcntl.h>).
2065 i_float (i_float.U):
2066 This variable conditionally defines the I_FLOAT symbol, and indicates
2067 whether a C program may include <float.h> to get symbols like DBL_MAX
2068 or DBL_MIN, i.e. machine dependent floating point values.
2071 This variable conditionally defines the I_GDBM symbol, which
2072 indicates to the C program that <gdbm.h> exists and should
2076 This variable conditionally defines the I_GRP symbol, and indicates
2077 whether a C program should include <grp.h>.
2079 i_iconv (i_iconv.U):
2080 This variable conditionally defines the I_ICONV symbol, and indicates
2081 whether a C program should include <iconv.h>.
2083 i_ieeefp (i_ieeefp.U):
2084 This variable conditionally defines the I_IEEEFP symbol, and indicates
2085 whether a C program should include <ieeefp.h>.
2087 i_inttypes (i_inttypes.U):
2088 This variable conditionally defines the I_INTTYPES symbol,
2089 and indicates whether a C program should include <inttypes.h>.
2091 i_libutil (i_libutil.U):
2092 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2093 whether a C program should include <libutil.h>.
2095 i_limits (i_limits.U):
2096 This variable conditionally defines the I_LIMITS symbol, and indicates
2097 whether a C program may include <limits.h> to get symbols like WORD_BIT
2100 i_locale (i_locale.U):
2101 This variable conditionally defines the I_LOCALE symbol,
2102 and indicates whether a C program should include <locale.h>.
2104 i_machcthr (i_machcthr.U):
2105 This variable conditionally defines the I_MACH_CTHREADS symbol,
2106 and indicates whether a C program should include <mach/cthreads.h>.
2108 i_malloc (i_malloc.U):
2109 This variable conditionally defines the I_MALLOC symbol, and indicates
2110 whether a C program should include <malloc.h>.
2113 This variable conditionally defines the I_MATH symbol, and indicates
2114 whether a C program may include <math.h>.
2116 i_memory (i_memory.U):
2117 This variable conditionally defines the I_MEMORY symbol, and indicates
2118 whether a C program should include <memory.h>.
2120 i_mntent (i_mntent.U):
2121 This variable conditionally defines the I_MNTENT symbol, and indicates
2122 whether a C program should include <mntent.h>.
2125 This variable conditionally defines the I_NDBM symbol, which
2126 indicates to the C program that <ndbm.h> exists and should
2129 i_netdb (i_netdb.U):
2130 This variable conditionally defines the I_NETDB symbol, and indicates
2131 whether a C program should include <netdb.h>.
2133 i_neterrno (i_neterrno.U):
2134 This variable conditionally defines the I_NET_ERRNO symbol, which
2135 indicates to the C program that <net/errno.h> exists and should
2138 i_netinettcp (i_netinettcp.U):
2139 This variable conditionally defines the I_NETINET_TCP symbol,
2140 and indicates whether a C program should include <netinet/tcp.h>.
2143 This variable conditionally defines I_NETINET_IN, which indicates
2144 to the C program that it should include <netinet/in.h>. Otherwise,
2145 you may try <sys/in.h>.
2148 This variable conditionally defines the I_POLL symbol, and indicates
2149 whether a C program should include <poll.h>.
2152 This variable conditionally defines the I_PROT symbol, and indicates
2153 whether a C program should include <prot.h>.
2155 i_pthread (i_pthread.U):
2156 This variable conditionally defines the I_PTHREAD symbol,
2157 and indicates whether a C program should include <pthread.h>.
2160 This variable conditionally defines I_PWD, which indicates
2161 to the C program that it should include <pwd.h>.
2163 i_rpcsvcdbm (i_dbm.U):
2164 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2165 indicates to the C program that <rpcsvc/dbm.h> exists and should
2166 be included. Some System V systems might need this instead of <dbm.h>.
2169 This variable conditionally defines the I_SFIO symbol,
2170 and indicates whether a C program should include <sfio.h>.
2172 i_sgtty (i_termio.U):
2173 This variable conditionally defines the I_SGTTY symbol, which
2174 indicates to the C program that it should include <sgtty.h> rather
2177 i_shadow (i_shadow.U):
2178 This variable conditionally defines the I_SHADOW symbol, and indicates
2179 whether a C program should include <shadow.h>.
2181 i_socks (i_socks.U):
2182 This variable conditionally defines the I_SOCKS symbol, and indicates
2183 whether a C program should include <socks.h>.
2185 i_stdarg (i_varhdr.U):
2186 This variable conditionally defines the I_STDARG symbol, which
2187 indicates to the C program that <stdarg.h> exists and should
2190 i_stddef (i_stddef.U):
2191 This variable conditionally defines the I_STDDEF symbol, which
2192 indicates to the C program that <stddef.h> exists and should
2195 i_stdlib (i_stdlib.U):
2196 This variable conditionally defines the I_STDLIB symbol, which
2197 indicates to the C program that <stdlib.h> exists and should
2200 i_string (i_string.U):
2201 This variable conditionally defines the I_STRING symbol, which
2202 indicates that <string.h> should be included rather than <strings.h>.
2204 i_sunmath (i_sunmath.U):
2205 This variable conditionally defines the I_SUNMATH symbol, and indicates
2206 whether a C program should include <sunmath.h>.
2208 i_sysaccess (i_sysaccess.U):
2209 This variable conditionally defines the I_SYS_ACCESS symbol,
2210 and indicates whether a C program should include <sys/access.h>.
2212 i_sysdir (i_sysdir.U):
2213 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2214 whether a C program should include <sys/dir.h>.
2216 i_sysfile (i_sysfile.U):
2217 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2218 whether a C program should include <sys/file.h> to get R_OK and friends.
2220 i_sysfilio (i_sysioctl.U):
2221 This variable conditionally defines the I_SYS_FILIO symbol, which
2222 indicates to the C program that <sys/filio.h> exists and should
2223 be included in preference to <sys/ioctl.h>.
2226 This variable conditionally defines I_SYS_IN, which indicates
2227 to the C program that it should include <sys/in.h> instead of
2230 i_sysioctl (i_sysioctl.U):
2231 This variable conditionally defines the I_SYS_IOCTL symbol, which
2232 indicates to the C program that <sys/ioctl.h> exists and should
2235 i_syslog (i_syslog.U):
2236 This variable conditionally defines the I_SYSLOG symbol,
2237 and indicates whether a C program should include <syslog.h>.
2239 i_sysmman (i_sysmman.U):
2240 This variable conditionally defines the I_SYS_MMAN symbol, and
2241 indicates whether a C program should include <sys/mman.h>.
2243 i_sysmode (i_sysmode.U):
2244 This variable conditionally defines the I_SYSMODE symbol,
2245 and indicates whether a C program should include <sys/mode.h>.
2247 i_sysmount (i_sysmount.U):
2248 This variable conditionally defines the I_SYSMOUNT symbol,
2249 and indicates whether a C program should include <sys/mount.h>.
2251 i_sysndir (i_sysndir.U):
2252 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2253 whether a C program should include <sys/ndir.h>.
2255 i_sysparam (i_sysparam.U):
2256 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2257 whether a C program should include <sys/param.h>.
2259 i_sysresrc (i_sysresrc.U):
2260 This variable conditionally defines the I_SYS_RESOURCE symbol,
2261 and indicates whether a C program should include <sys/resource.h>.
2263 i_syssecrt (i_syssecrt.U):
2264 This variable conditionally defines the I_SYS_SECURITY symbol,
2265 and indicates whether a C program should include <sys/security.h>.
2267 i_sysselct (i_sysselct.U):
2268 This variable conditionally defines I_SYS_SELECT, which indicates
2269 to the C program that it should include <sys/select.h> in order to
2270 get the definition of struct timeval.
2272 i_syssockio (i_sysioctl.U):
2273 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2274 C program that socket ioctl codes may be found in <sys/sockio.h>
2275 instead of <sys/ioctl.h>.
2277 i_sysstat (i_sysstat.U):
2278 This variable conditionally defines the I_SYS_STAT symbol,
2279 and indicates whether a C program should include <sys/stat.h>.
2281 i_sysstatfs (i_sysstatfs.U):
2282 This variable conditionally defines the I_SYSSTATFS symbol,
2283 and indicates whether a C program should include <sys/statfs.h>.
2285 i_sysstatvfs (i_sysstatvfs.U):
2286 This variable conditionally defines the I_SYSSTATVFS symbol,
2287 and indicates whether a C program should include <sys/statvfs.h>.
2289 i_systime (i_time.U):
2290 This variable conditionally defines I_SYS_TIME, which indicates
2291 to the C program that it should include <sys/time.h>.
2293 i_systimek (i_time.U):
2294 This variable conditionally defines I_SYS_TIME_KERNEL, which
2295 indicates to the C program that it should include <sys/time.h>
2296 with KERNEL defined.
2298 i_systimes (i_systimes.U):
2299 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2300 whether a C program should include <sys/times.h>.
2302 i_systypes (i_systypes.U):
2303 This variable conditionally defines the I_SYS_TYPES symbol,
2304 and indicates whether a C program should include <sys/types.h>.
2306 i_sysuio (i_sysuio.U):
2307 This variable conditionally defines the I_SYSUIO symbol, and indicates
2308 whether a C program should include <sys/uio.h>.
2310 i_sysun (i_sysun.U):
2311 This variable conditionally defines I_SYS_UN, which indicates
2312 to the C program that it should include <sys/un.h> to get UNIX
2313 domain socket definitions.
2315 i_sysutsname (i_sysutsname.U):
2316 This variable conditionally defines the I_SYSUTSNAME symbol,
2317 and indicates whether a C program should include <sys/utsname.h>.
2319 i_sysvfs (i_sysvfs.U):
2320 This variable conditionally defines the I_SYSVFS symbol,
2321 and indicates whether a C program should include <sys/vfs.h>.
2323 i_syswait (i_syswait.U):
2324 This variable conditionally defines I_SYS_WAIT, which indicates
2325 to the C program that it should include <sys/wait.h>.
2327 i_termio (i_termio.U):
2328 This variable conditionally defines the I_TERMIO symbol, which
2329 indicates to the C program that it should include <termio.h> rather
2332 i_termios (i_termio.U):
2333 This variable conditionally defines the I_TERMIOS symbol, which
2334 indicates to the C program that the POSIX <termios.h> file is
2338 This variable conditionally defines I_TIME, which indicates
2339 to the C program that it should include <time.h>.
2341 i_unistd (i_unistd.U):
2342 This variable conditionally defines the I_UNISTD symbol, and indicates
2343 whether a C program should include <unistd.h>.
2345 i_ustat (i_ustat.U):
2346 This variable conditionally defines the I_USTAT symbol, and indicates
2347 whether a C program should include <ustat.h>.
2349 i_utime (i_utime.U):
2350 This variable conditionally defines the I_UTIME symbol, and indicates
2351 whether a C program should include <utime.h>.
2353 i_values (i_values.U):
2354 This variable conditionally defines the I_VALUES symbol, and indicates
2355 whether a C program may include <values.h> to get symbols like MAXLONG
2358 i_varargs (i_varhdr.U):
2359 This variable conditionally defines I_VARARGS, which indicates
2360 to the C program that it should include <varargs.h>.
2362 i_varhdr (i_varhdr.U):
2363 Contains the name of the header to be included to get va_dcl definition.
2364 Typically one of varargs.h or stdarg.h.
2366 i_vfork (i_vfork.U):
2367 This variable conditionally defines the I_VFORK symbol, and indicates
2368 whether a C program should include vfork.h.
2370 ignore_versioned_solibs (libs.U):
2371 This variable should be non-empty if non-versioned shared
2372 libraries (libfoo.so.x.y) are to be ignored (because they
2373 cannot be linked against).
2375 inc_version_list (inc_version_list.U):
2376 This variable specifies the list of subdirectories in over
2377 which perl.c:incpush() and lib/lib.pm will automatically
2378 search when adding directories to @INC. The elements in
2379 the list are separated by spaces. This is only useful
2380 if you have a perl library directory tree structured like the
2381 default one. See INSTALL for how this works. The versioned
2382 site_perl directory was introduced in 5.005, so that is the
2383 lowest possible value.
2385 inc_version_list_init (inc_version_list.U):
2386 This variable holds the same list as inc_version_list, but
2387 each item is enclosed in double quotes and separated by commas,
2388 suitable for use in the PERL_INC_VERSION_LIST initialization.
2391 This variable must preceed the normal include path to get hte
2392 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2393 Value can be "" or "/bsd43" on mips.
2396 This variable is defined but not used by Configure.
2397 The value is a plain '' and is not useful.
2399 installarchlib (archlib.U):
2400 This variable is really the same as archlibexp but may differ on
2401 those systems using AFS. For extra portability, only this variable
2402 should be used in makefiles.
2405 This variable is the same as binexp unless AFS is running in which case
2406 the user is explicitely prompted for it. This variable should always
2407 be used in your makefiles for maximum portability.
2409 installman1dir (man1dir.U):
2410 This variable is really the same as man1direxp, unless you are using
2411 AFS in which case it points to the read/write location whereas
2412 man1direxp only points to the read-only access location. For extra
2413 portability, you should only use this variable within your makefiles.
2415 installman3dir (man3dir.U):
2416 This variable is really the same as man3direxp, unless you are using
2417 AFS in which case it points to the read/write location whereas
2418 man3direxp only points to the read-only access location. For extra
2419 portability, you should only use this variable within your makefiles.
2421 installprefix (installprefix.U):
2422 This variable holds the name of the directory below which
2423 "make install" will install the package. For most users, this
2424 is the same as prefix. However, it is useful for
2425 installing the software into a different (usually temporary)
2426 location after which it can be bundled up and moved somehow
2427 to the final location specified by prefix.
2429 installprefixexp (installprefix.U):
2430 This variable holds the full absolute path of installprefix
2431 with all ~-expansion done.
2433 installprivlib (privlib.U):
2434 This variable is really the same as privlibexp but may differ on
2435 those systems using AFS. For extra portability, only this variable
2436 should be used in makefiles.
2438 installscript (scriptdir.U):
2439 This variable is usually the same as scriptdirexp, unless you are on
2440 a system running AFS, in which case they may differ slightly. You
2441 should always use this variable within your makefiles for portability.
2443 installsitearch (sitearch.U):
2444 This variable is really the same as sitearchexp but may differ on
2445 those systems using AFS. For extra portability, only this variable
2446 should be used in makefiles.
2448 installsitebin (sitebin.U):
2449 This variable is usually the same as sitebinexp, unless you are on
2450 a system running AFS, in which case they may differ slightly. You
2451 should always use this variable within your makefiles for portability.
2453 installsitelib (sitelib.U):
2454 This variable is really the same as sitelibexp but may differ on
2455 those systems using AFS. For extra portability, only this variable
2456 should be used in makefiles.
2458 installstyle (installstyle.U):
2459 This variable describes the "style" of the perl installation.
2460 This is intended to be useful for tools that need to
2461 manipulate entire perl distributions. Perl itself doesn't use
2462 this to find its libraries -- the library directories are
2463 stored directly in Config.pm. Currently, there are only two
2464 styles: "lib" and "lib/perl5". The default library locations
2465 (e.g. privlib, sitelib) are either $prefix/lib or
2466 $prefix/lib/perl5. The former is useful if $prefix is a
2467 directory dedicated to perl (e.g. /opt/perl), while the latter
2468 is useful if $prefix is shared by many packages, e.g. if
2470 This may later be extended to include other information, so
2471 be careful with pattern-matching on the results.
2472 For compatibility with perl5.005 and earlier, the default
2473 setting is based on whether or not $prefix contains the string
2476 installusrbinperl (instubperl.U):
2477 This variable tells whether Perl should be installed also as
2478 /usr/bin/perl in addition to
2481 installvendorarch (vendorarch.U):
2482 This variable is really the same as vendorarchexp but may differ on
2483 those systems using AFS. For extra portability, only this variable
2484 should be used in makefiles.
2486 installvendorbin (vendorbin.U):
2487 This variable is really the same as vendorbinexp but may differ on
2488 those systems using AFS. For extra portability, only this variable
2489 should be used in makefiles.
2491 installvendorlib (vendorlib.U):
2492 This variable is really the same as vendorlibexp but may differ on
2493 those systems using AFS. For extra portability, only this variable
2494 should be used in makefiles.
2496 intsize (intsize.U):
2497 This variable contains the value of the INTSIZE symbol, which
2498 indicates to the C program how many bytes there are in an int.
2500 issymlink (issymlink.U):
2501 This variable holds the test command to test for a symbolic link
2502 (if they are supported). Typical values include 'test -h' and
2505 ivdformat (perlxvf.U):
2506 This variable contains the format string used for printing
2507 a Perl IV as a signed decimal integer.
2510 This variable is the size of an IV in bytes.
2513 This variable contains the C type used for Perl's IV.
2515 known_extensions (Extensions.U):
2516 This variable holds a list of all XS extensions included in
2520 This variable is defined but not used by Configure.
2521 The value is a plain '' and is not useful.
2524 This variable indicates the program to be used to link
2525 libraries for dynamic loading. On some systems, it is 'ld'.
2526 On ELF systems, it should be $cc. Mostly, we'll try to respect
2527 the hint file setting.
2529 lddlflags (dlsrc.U):
2530 This variable contains any special flags that might need to be
2531 passed to $ld to create a shared library suitable for dynamic
2532 loading. It is up to the makefile to use it. For hpux, it
2533 should be '-b'. For sunos 4.1, it is empty.
2535 ldflags (ccflags.U):
2536 This variable contains any additional C loader flags desired by
2537 the user. It is up to the Makefile to use this.
2539 ldflags_uselargefiles (uselfs.U):
2540 This variable contains the loader flags needed by large file builds
2541 and added to ldflags by hints files.
2543 ldlibpthname (libperl.U):
2544 This variable holds the name of the shared library
2545 search path, often LD_LIBRARY_PATH. To get an empty
2546 string, the hints file must set this to 'none'.
2549 This variable is used internally by Configure to determine the
2550 full pathname (if any) of the less program. After Configure runs,
2551 the value is reset to a plain "less" and is not useful.
2554 This is an old synonym for _a.
2557 This variable contains the location of the C library.
2559 libperl (libperl.U):
2560 The perl executable is obtained by linking perlmain.c with
2561 libperl, any static extensions (usually just DynaLoader),
2562 and any other libraries needed on this system. libperl
2563 is usually libperl.a, but can also be libperl.so.xxx if
2564 the user wishes to build a perl executable with a shared
2568 This variable holds the general path (space-separated) used to find
2569 libraries. It is intended to be used by other units.
2572 This variable holds the additional libraries we want to use.
2573 It is up to the Makefile to deal with it.
2576 This variable holds the directory names aka dirnames of the libraries
2577 we found and accepted, duplicates are removed.
2580 This variable holds the filenames aka basenames of the libraries
2581 we found and accepted.
2584 This variable holds the full pathnames of the libraries
2585 we found and accepted.
2588 This variable holds the directory names probed for libraries.
2590 libswanted (Myinit.U):
2591 This variable holds a list of all the libraries we want to
2592 search. The order is chosen to pick up the c library
2593 ahead of ucb or bsd libraries for SVR4.
2595 libswanted_uselargefiles (uselfs.U):
2596 This variable contains the libraries needed by large file builds
2597 and added to ldflags by hints files. It is a space separated list
2598 of the library names without the "lib" prefix or any suffix, just
2602 This variable is defined but not used by Configure.
2603 The value is a plain '' and is not useful.
2606 This variable is defined but not used by Configure.
2607 The value is a plain '' and is not useful.
2609 lkflags (ccflags.U):
2610 This variable contains any additional C partial linker flags desired by
2611 the user. It is up to the Makefile to use this.
2614 This variable is used internally by Configure to determine the
2615 full pathname (if any) of the ln program. After Configure runs,
2616 the value is reset to a plain "ln" and is not useful.
2619 This variable holds the name of the command to make
2620 symbolic links (if they are supported). It can be used
2621 in the Makefile. It is either 'ln -s' or 'ln'
2623 locincpth (ccflags.U):
2624 This variable contains a list of additional directories to be
2625 searched by the compiler. The appropriate '-I' directives will
2626 be added to ccflags. This is intended to simplify setting
2627 local directories from the Configure command line.
2628 It's not much, but it parallels the loclibpth stuff in libpth.U.
2630 loclibpth (libpth.U):
2631 This variable holds the paths (space-separated) used to find local
2632 libraries. It is prepended to libpth, and is intended to be easily
2633 set from the command line.
2635 longdblsize (d_longdbl.U):
2636 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2637 indicates to the C program how many bytes there are in a long double,
2638 if this system supports long doubles.
2640 longlongsize (d_longlong.U):
2641 This variable contains the value of the LONGLONGSIZE symbol, which
2642 indicates to the C program how many bytes there are in a long long,
2643 if this system supports long long.
2645 longsize (intsize.U):
2646 This variable contains the value of the LONGSIZE symbol, which
2647 indicates to the C program how many bytes there are in a long.
2650 This variable is defined but not used by Configure.
2651 The value is a plain '' and is not useful.
2654 This variable is defined but not used by Configure.
2655 The value is a plain '' and is not useful.
2658 This variable is used internally by Configure to determine the
2659 full pathname (if any) of the ls program. After Configure runs,
2660 the value is reset to a plain "ls" and is not useful.
2662 lseeksize (lseektype.U):
2663 This variable defines lseektype to be something like off_t, long,
2664 or whatever type is used to declare lseek offset's type in the
2665 kernel (which also appears to be lseek's return type).
2667 lseektype (lseektype.U):
2668 This variable defines lseektype to be something like off_t, long,
2669 or whatever type is used to declare lseek offset's type in the
2670 kernel (which also appears to be lseek's return type).
2673 This variable is defined but not used by Configure.
2674 The value is a plain '' and is not useful.
2677 This variable is defined but not used by Configure.
2678 The value is a plain '' and is not useful.
2681 This variable is used internally by Configure to determine the
2682 full pathname (if any) of the make program. After Configure runs,
2683 the value is reset to a plain "make" and is not useful.
2685 make_set_make (make.U):
2686 Some versions of 'make' set the variable MAKE. Others do not.
2687 This variable contains the string to be included in Makefile.SH
2688 so that MAKE is set if needed, and not if not needed.
2689 Possible values are:
2690 make_set_make='#' # If your make program handles this for you,
2691 make_set_make="MAKE=$make" # if it doesn't.
2692 I used a comment character so that we can distinguish a
2693 'set' value (from a previous config.sh or Configure '-D' option)
2694 from an uncomputed value.
2696 mallocobj (mallocsrc.U):
2697 This variable contains the name of the malloc.o that this package
2698 generates, if that malloc.o is preferred over the system malloc.
2699 Otherwise the value is null. This variable is intended for generating
2700 Makefiles. See mallocsrc.
2702 mallocsrc (mallocsrc.U):
2703 This variable contains the name of the malloc.c that comes with
2704 the package, if that malloc.c is preferred over the system malloc.
2705 Otherwise the value is null. This variable is intended for generating
2708 malloctype (mallocsrc.U):
2709 This variable contains the kind of ptr returned by malloc and realloc.
2711 man1dir (man1dir.U):
2712 This variable contains the name of the directory in which manual
2713 source pages are to be put. It is the responsibility of the
2714 Makefile.SH to get the value of this into the proper command.
2715 You must be prepared to do the ~name expansion yourself.
2717 man1direxp (man1dir.U):
2718 This variable is the same as the man1dir variable, but is filename
2719 expanded at configuration time, for convenient use in makefiles.
2721 man1ext (man1dir.U):
2722 This variable contains the extension that the manual page should
2723 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2726 man3dir (man3dir.U):
2727 This variable contains the name of the directory in which manual
2728 source pages are to be put. It is the responsibility of the
2729 Makefile.SH to get the value of this into the proper command.
2730 You must be prepared to do the ~name expansion yourself.
2732 man3direxp (man3dir.U):
2733 This variable is the same as the man3dir variable, but is filename
2734 expanded at configuration time, for convenient use in makefiles.
2736 man3ext (man3dir.U):
2737 This variable contains the extension that the manual page should
2738 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2742 This variable is used internally by Configure to determine the
2743 full pathname (if any) of the Mcc program. After Configure runs,
2744 the value is reset to a plain "Mcc" and is not useful.
2746 mips_type (usrinc.U):
2747 This variable holds the environment type for the mips system.
2748 Possible values are "BSD 4.3" and "System V".
2751 This variable is used internally by Configure to determine the
2752 full pathname (if any) of the mkdir program. After Configure runs,
2753 the value is reset to a plain "mkdir" and is not useful.
2755 mmaptype (d_mmap.U):
2756 This symbol contains the type of pointer returned by mmap()
2757 (and simultaneously the type of the first argument).
2758 It can be 'void *' or 'caddr_t'.
2760 modetype (modetype.U):
2761 This variable defines modetype to be something like mode_t,
2762 int, unsigned short, or whatever type is used to declare file
2763 modes for system calls.
2766 This variable is used internally by Configure to determine the
2767 full pathname (if any) of the more program. After Configure runs,
2768 the value is reset to a plain "more" and is not useful.
2770 multiarch (multiarch.U):
2771 This variable conditionally defines the MULTIARCH symbol
2772 which signifies the presence of multiplatform files.
2773 This is normally set by hints files.
2776 This variable is defined but not used by Configure.
2777 The value is a plain '' and is not useful.
2779 myarchname (archname.U):
2780 This variable holds the architecture name computed by Configure in
2781 a previous run. It is not intended to be perused by any user and
2782 should never be set in a hint file.
2784 mydomain (myhostname.U):
2785 This variable contains the eventual value of the MYDOMAIN symbol,
2786 which is the domain of the host the program is going to run on.
2787 The domain must be appended to myhostname to form a complete host name.
2788 The dot comes with mydomain, and need not be supplied by the program.
2790 myhostname (myhostname.U):
2791 This variable contains the eventual value of the MYHOSTNAME symbol,
2792 which is the name of the host the program is going to run on.
2793 The domain is not kept with hostname, but must be gotten from mydomain.
2794 The dot comes with mydomain, and need not be supplied by the program.
2796 myuname (Oldconfig.U):
2797 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2798 pseudo variables assignments in the output are stripped, thank you. The
2799 whole thing is then lower-cased.
2802 This variable contains the '-n' flag if that is what causes the echo
2803 command to suppress newline. Otherwise it is null. Correct usage is
2804 $echo $n "prompt for a question: $c".
2806 need_va_copy (need_va_copy.U):
2807 This symbol, if defined, indicates that the system stores
2808 the variable argument list datatype, va_list, in a format
2809 that cannot be copied by simple assignment, so that some
2810 other means must be used when copying is required.
2811 As such systems vary in their provision (or non-provision)
2812 of copying mechanisms, handy.h defines a platform-
2813 independent macro, Perl_va_copy(src, dst), to do the job.
2815 netdb_hlen_type (netdbtype.U):
2816 This variable holds the type used for the 2nd argument to
2817 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2818 This is only useful if you have gethostbyaddr(), naturally.
2820 netdb_host_type (netdbtype.U):
2821 This variable holds the type used for the 1st argument to
2822 gethostbyaddr(). Usually, this is char * or void *, possibly
2823 with or without a const prefix.
2824 This is only useful if you have gethostbyaddr(), naturally.
2826 netdb_name_type (netdbtype.U):
2827 This variable holds the type used for the argument to
2828 gethostbyname(). Usually, this is char * or const char *.
2829 This is only useful if you have gethostbyname(), naturally.
2831 netdb_net_type (netdbtype.U):
2832 This variable holds the type used for the 1st argument to
2833 getnetbyaddr(). Usually, this is int or long.
2834 This is only useful if you have getnetbyaddr(), naturally.
2837 This variable is used internally by Configure to determine the
2838 full pathname (if any) of the nm program. After Configure runs,
2839 the value is reset to a plain "nm" and is not useful.
2842 This variable holds the options that may be necessary for nm.
2844 nm_so_opt (usenm.U):
2845 This variable holds the options that may be necessary for nm
2846 to work on a shared library but that can not be used on an
2847 archive library. Currently, this is only used by Linux, where
2848 nm --dynamic is *required* to get symbols from an ELF library which
2849 has been stripped, but nm --dynamic is *fatal* on an archive library.
2850 Maybe Linux should just always set usenm=false.
2852 nonxs_ext (Extensions.U):
2853 This variable holds a list of all non-xs extensions included
2854 in the package. All of them will be built.
2857 This variable is used internally by Configure to determine the
2858 full pathname (if any) of the nroff program. After Configure runs,
2859 the value is reset to a plain "nroff" and is not useful.
2861 nveformat (perlxvf.U):
2862 This variable contains the format string used for printing
2863 a Perl NV using %e-ish floating point format.
2865 nvEUformat (perlxvf.U):
2866 This variable contains the format string used for printing
2867 a Perl NV using %E-ish floating point format.
2869 nvfformat (perlxvf.U):
2870 This variable confains the format string used for printing
2871 a Perl NV using %f-ish floating point format.
2873 nvFUformat (perlxvf.U):
2874 This variable confains the format string used for printing
2875 a Perl NV using %F-ish floating point format.
2877 nvgformat (perlxvf.U):
2878 This variable contains the format string used for printing
2879 a Perl NV using %g-ish floating point format.
2881 nvGUformat (perlxvf.U):
2882 This variable contains the format string used for printing
2883 a Perl NV using %G-ish floating point format.
2886 This variable is the size of an NV in bytes.
2889 This variable contains the C type used for Perl's NV.
2891 o_nonblock (nblock_io.U):
2892 This variable bears the symbol value to be used during open() or fcntl()
2893 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2894 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2895 but that is only supported by some devices.
2898 This is an old synonym for _o.
2900 old_pthread_create_joinable (d_pthrattrj.U):
2901 This variable defines the constant to use for creating joinable
2902 (aka undetached) pthreads. Unused if pthread.h defines
2903 PTHREAD_CREATE_JOINABLE. If used, possible values are
2904 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2906 optimize (ccflags.U):
2907 This variable contains any optimizer/debugger flag that should be used.
2908 It is up to the Makefile to use it.
2910 orderlib (orderlib.U):
2911 This variable is "true" if the components of libraries must be ordered
2912 (with `lorder $* | tsort`) before placing them in an archive. Set to
2913 "false" if ranlib or ar can generate random libraries.
2915 osname (Oldconfig.U):
2916 This variable contains the operating system name (e.g. sunos,
2917 solaris, hpux, etc.). It can be useful later on for setting
2918 defaults. Any spaces are replaced with underscores. It is set
2919 to a null string if we can't figure it out.
2921 osvers (Oldconfig.U):
2922 This variable contains the operating system version (e.g.
2923 4.1.3, 5.2, etc.). It is primarily used for helping select
2924 an appropriate hints file, but might be useful elsewhere for
2925 setting defaults. It is set to '' if we can't figure it out.
2926 We try to be flexible about how much of the version number
2927 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2928 same for this package, hints files might just be os_4.0 or
2929 os_4.1, etc., not keeping separate files for each little release.
2931 otherlibdirs (otherlibdirs.U):
2932 This variable contains a colon-separated set of paths for the perl
2933 binary to search for additional library files or modules.
2934 These directories will be tacked to the end of @INC.
2935 Perl will automatically search below each path for version-
2936 and architecture-specific directories. See inc_version_list
2938 A value of ' ' means 'none' and is used to preserve this value
2939 for the next run through Configure.
2941 package (package.U):
2942 This variable contains the name of the package being constructed.
2943 It is primarily intended for the use of later Configure units.
2946 This variable contains the name of the preferred pager on the system.
2947 Usual values are (the full pathnames of) more, less, pg, or cat.
2950 This variable contains a command that produces the text of the
2951 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2952 "ypcat passwd" when NIS is used.
2953 On some systems, such as os390, there may be no equivalent
2954 command, in which case this variable is unset.
2956 patchlevel (patchlevel.U):
2957 The patchlevel level of this package.
2958 The value of patchlevel comes from the patchlevel.h file.
2959 In a version number such as 5.6.1, this is the "6".
2960 In patchlevel.h, this is referred to as "PERL_VERSION".
2963 This is an old synonym for p_ in Head.U, the character
2964 used to separate elements in the command shell search PATH.
2967 This variable contains the full path (if any) to a previously
2968 installed perl5.005 or later suitable for running the script
2969 to determine inc_version_list.
2972 This variable is defined but not used by Configure.
2973 The value is a plain '' and is not useful.
2975 PERL_REVISION (Oldsyms.U):
2976 In a Perl version number such as 5.6.2, this is the 5.
2977 This value is manually set in patchlevel.h
2979 PERL_SUBVERSION (Oldsyms.U):
2980 In a Perl version number such as 5.6.2, this is the 2.
2981 Values greater than 50 represent potentially unstable
2982 development subversions.
2983 This value is manually set in patchlevel.h
2985 PERL_VERSION (Oldsyms.U):
2986 In a Perl version number such as 5.6.2, this is the 6.
2987 This value is manually set in patchlevel.h
2989 perladmin (perladmin.U):
2990 Electronic mail address of the perl5 administrator.
2993 The list of libraries needed by Perl only (any libraries needed
2994 by extensions only will by dropped, if using dynamic loading).
2996 perlpath (perlpath.U):
2997 This variable contains the eventual value of the PERLPATH symbol,
2998 which contains the name of the perl interpreter to be used in
2999 shell scripts and in the "eval 'exec'" idiom.
3002 This variable is used internally by Configure to determine the
3003 full pathname (if any) of the pg program. After Configure runs,
3004 the value is reset to a plain "pg" and is not useful.
3006 phostname (myhostname.U):
3007 This variable contains the eventual value of the PHOSTNAME symbol,
3008 which is a command that can be fed to popen() to get the host name.
3009 The program should probably not presume that the domain is or isn't
3012 pidtype (pidtype.U):
3013 This variable defines PIDTYPE to be something like pid_t, int,
3014 ushort, or whatever type is used to declare process ids in the kernel.
3017 Holds the private path used by Configure to find out the libraries.
3018 Its value is prepend to libpth. This variable takes care of special
3019 machines, like the mips. Usually, it should be empty.
3021 pm_apiversion (xs_apiversion.U):
3022 This variable contains the version of the oldest perl
3023 compatible with the present perl. (That is, pure perl modules
3024 written for $pm_apiversion will still work for the current
3025 version). perl.c:incpush() and lib/lib.pm will automatically
3026 search in $sitelib for older directories across major versions
3027 back to pm_apiversion. This is only useful if you have a perl
3028 library directory tree structured like the default one. The
3029 versioned site_perl library was introduced in 5.005, so that's
3030 the default setting for this variable. It's hard to imagine
3031 it changing before Perl6. It is included here for symmetry
3032 with xs_apiveprsion -- the searching algorithms will
3033 (presumably) be similar.
3034 See the INSTALL file for how this works.
3037 This variable is defined but not used by Configure.
3038 The value is a plain '' and is not useful.
3041 This variable is defined but not used by Configure.
3042 The value is a plain '' and is not useful.
3045 This variable holds the name of the directory below which the
3046 user will install the package. Usually, this is /usr/local, and
3047 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3048 man pages in /usr/local/man, etc. It is only used to set defaults
3049 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3051 prefixexp (prefix.U):
3052 This variable holds the full absolute path of the directory below
3053 which the user will install the package. Derived from prefix.
3055 privlib (privlib.U):
3056 This variable contains the eventual value of the PRIVLIB symbol,
3057 which is the name of the private library for this package. It may
3058 have a ~ on the front. It is up to the makefile to eventually create
3059 this directory while performing installation (with ~ substitution).
3061 privlibexp (privlib.U):
3062 This variable is the ~name expanded version of privlib, so that you
3063 may use it directly in Makefiles or shell scripts.
3065 prototype (prototype.U):
3066 This variable holds the eventual value of CAN_PROTOTYPE, which
3067 indicates the C compiler can handle funciton prototypes.
3069 ptrsize (ptrsize.U):
3070 This variable contains the value of the PTRSIZE symbol, which
3071 indicates to the C program how many bytes there are in a pointer.
3073 quadkind (quadtype.U):
3074 This variable, if defined, encodes the type of a quad:
3075 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3077 quadtype (quadtype.U):
3078 This variable defines Quad_t to be something like long, int,
3079 long long, int64_t, or whatever type is used for 64-bit integers.
3081 randbits (randfunc.U):
3082 Indicates how many bits are produced by the function used to
3083 generate normalized random numbers.
3085 randfunc (randfunc.U):
3086 Indicates the name of the random number function to use.
3087 Values include drand48, random, and rand. In C programs,
3088 the 'Drand01' macro is defined to generate uniformly distributed
3089 random numbers over the range [0., 1.[ (see drand01 and nrand).
3091 randseedtype (randfunc.U):
3092 Indicates the type of the argument of the seedfunc.
3094 ranlib (orderlib.U):
3095 This variable is set to the pathname of the ranlib program, if it is
3096 needed to generate random libraries. Set to ":" if ar can generate
3097 random libraries or if random libraries are not supported
3099 rd_nodata (nblock_io.U):
3100 This variable holds the return code from read() when no data is
3101 present. It should be -1, but some systems return 0 when O_NDELAY is
3102 used, which is a shame because you cannot make the difference between
3103 no data and an EOF.. Sigh!
3105 revision (patchlevel.U):
3106 The value of revision comes from the patchlevel.h file.
3107 In a version number such as 5.6.1, this is the "5".
3108 In patchlevel.h, this is referred to as "PERL_REVISION".
3111 This variable is used internally by Configure to determine the
3112 full pathname (if any) of the rm program. After Configure runs,
3113 the value is reset to a plain "rm" and is not useful.
3116 This variable is defined but not used by Configure.
3117 The value is a plain '' and is not useful.
3120 This variable contains 'true' or 'false' depending whether the
3121 nm extraction should be performed or not, according to the value
3122 of usenm and the flags on the Configure command line.
3124 sched_yield (d_pthread_y.U):
3125 This variable defines the way to yield the execution
3126 of the current thread.
3128 scriptdir (scriptdir.U):
3129 This variable holds the name of the directory in which the user wants
3130 to put publicly scripts for the package in question. It is either
3131 the same directory as for binaries, or a special one that can be
3132 mounted across different architectures, like /usr/share. Programs
3133 must be prepared to deal with ~name expansion.
3135 scriptdirexp (scriptdir.U):
3136 This variable is the same as scriptdir, but is filename expanded
3137 at configuration time, for programs not wanting to bother with it.
3140 This variable is used internally by Configure to determine the
3141 full pathname (if any) of the sed program. After Configure runs,
3142 the value is reset to a plain "sed" and is not useful.
3144 seedfunc (randfunc.U):
3145 Indicates the random number generating seed function.
3146 Values include srand48, srandom, and srand.
3148 selectminbits (selectminbits.U):
3149 This variable holds the minimum number of bits operated by select.
3150 That is, if you do select(n, ...), how many bits at least will be
3151 cleared in the masks if some activity is detected. Usually this
3152 is either n or 32*ceil(n/32), especially many little-endians do
3153 the latter. This is only useful if you have select(), naturally.
3155 selecttype (selecttype.U):
3156 This variable holds the type used for the 2nd, 3rd, and 4th
3157 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3158 is defined, and 'int *' otherwise. This is only useful if you
3159 have select(), naturally.
3162 This variable is defined but not used by Configure.
3163 The value is a plain '' and is not useful.
3166 This variable contains the full pathname of the shell used
3167 on this system to execute Bourne shell scripts. Usually, this will be
3168 /bin/sh, though it's possible that some systems will have /bin/ksh,
3169 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3171 This unit comes before Options.U, so you can't set sh with a '-D'
3172 option, though you can override this (and startsh)
3173 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3176 This variable is defined but not used by Configure.
3177 The value is a plain '' and is not useful.
3179 sharpbang (spitshell.U):
3180 This variable contains the string #! if this system supports that
3183 shmattype (d_shmat.U):
3184 This symbol contains the type of pointer returned by shmat().
3185 It can be 'void *' or 'char *'.
3187 shortsize (intsize.U):
3188 This variable contains the value of the SHORTSIZE symbol which
3189 indicates to the C program how many bytes there are in a short.
3191 shrpenv (libperl.U):
3192 If the user builds a shared libperl.so, then we need to tell the
3193 'perl' executable where it will be able to find the installed libperl.so.
3194 One way to do this on some systems is to set the environment variable
3195 LD_RUN_PATH to the directory that will be the final location of the
3196 shared libperl.so. The makefile can use this with something like
3197 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3199 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3202 See the main perl Makefile.SH for actual working usage.
3203 Alternatively, we might be able to use a command line option such
3204 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3205 $archlibexp/CORE (Linux).
3207 shsharp (spitshell.U):
3208 This variable tells further Configure units whether your sh can
3211 sig_count (sig_name.U):
3212 This variable holds a number larger than the largest valid
3213 signal number. This is usually the same as the NSIG macro.
3215 sig_name (sig_name.U):
3216 This variable holds the signal names, space separated. The leading
3217 SIG in signal name is removed. A ZERO is prepended to the
3218 list. This is currently not used.
3220 sig_name_init (sig_name.U):
3221 This variable holds the signal names, enclosed in double quotes and
3222 separated by commas, suitable for use in the SIG_NAME definition
3223 below. A "ZERO" is prepended to the list, and the list is
3224 terminated with a plain 0. The leading SIG in signal names
3225 is removed. See sig_num.
3227 sig_num (sig_name.U):
3228 This variable holds the signal numbers, space separated. A ZERO is
3229 prepended to the list (corresponding to the fake SIGZERO), and
3230 the list is terminated with a 0. Those numbers correspond to
3231 the value of the signal listed in the same place within the
3234 sig_num_init (sig_name.U):
3235 This variable holds the signal numbers, enclosed in double quotes and
3236 separated by commas, suitable for use in the SIG_NUM definition
3237 below. A "ZERO" is prepended to the list, and the list is
3238 terminated with a plain 0.
3240 sig_size (sig_name.U):
3241 This variable contains the number of elements of the sig_name
3242 and sig_num arrays, excluding the final NULL entry.
3244 signal_t (d_voidsig.U):
3245 This variable holds the type of the signal handler (void or int).
3247 sitearch (sitearch.U):
3248 This variable contains the eventual value of the SITEARCH symbol,
3249 which is the name of the private library for this package. It may
3250 have a ~ on the front. It is up to the makefile to eventually create
3251 this directory while performing installation (with ~ substitution).
3252 The standard distribution will put nothing in this directory.
3253 After perl has been installed, users may install their own local
3254 architecture-dependent modules in this directory with
3255 MakeMaker Makefile.PL
3256 or equivalent. See INSTALL for details.
3258 sitearchexp (sitearch.U):
3259 This variable is the ~name expanded version of sitearch, so that you
3260 may use it directly in Makefiles or shell scripts.
3262 sitebin (sitebin.U):
3263 This variable holds the name of the directory in which the user wants
3264 to put add-on publicly executable files for the package in question. It
3265 is most often a local directory such as /usr/local/bin. Programs using
3266 this variable must be prepared to deal with ~name substitution.
3267 The standard distribution will put nothing in this directory.
3268 After perl has been installed, users may install their own local
3269 executables in this directory with
3270 MakeMaker Makefile.PL
3271 or equivalent. See INSTALL for details.
3273 sitebinexp (sitebin.U):
3274 This is the same as the sitebin variable, but is filename expanded at
3275 configuration time, for use in your makefiles.
3277 sitelib (sitelib.U):
3278 This variable contains the eventual value of the SITELIB symbol,
3279 which is the name of the private library for this package. It may
3280 have a ~ on the front. It is up to the makefile to eventually create
3281 this directory while performing installation (with ~ substitution).
3282 The standard distribution will put nothing in this directory.
3283 After perl has been installed, users may install their own local
3284 architecture-independent modules in this directory with
3285 MakeMaker Makefile.PL
3286 or equivalent. See INSTALL for details.
3288 sitelib_stem (sitelib.U):
3289 This variable is $sitelibexp with any trailing version-specific component
3290 removed. The elements in inc_version_list (inc_version_list.U) can
3291 be tacked onto this variable to generate a list of directories to search.
3293 sitelibexp (sitelib.U):
3294 This variable is the ~name expanded version of sitelib, so that you
3295 may use it directly in Makefiles or shell scripts.
3297 siteprefix (siteprefix.U):
3298 This variable holds the full absolute path of the directory below
3299 which the user will install add-on packages.
3300 See INSTALL for usage and examples.
3302 siteprefixexp (siteprefix.U):
3303 This variable holds the full absolute path of the directory below
3304 which the user will install add-on packages. Derived from siteprefix.
3306 sizesize (sizesize.U):
3307 This variable contains the size of a sizetype in bytes.
3309 sizetype (sizetype.U):
3310 This variable defines sizetype to be something like size_t,
3311 unsigned long, or whatever type is used to declare length
3312 parameters for string functions.
3315 This variable is defined but not used by Configure.
3316 The value is a plain '' and is not useful.
3319 This variable is defined but not used by Configure.
3320 The value is a plain '' and is not useful.
3323 This variable holds the extension used to identify shared libraries
3324 (also known as shared objects) on the system. Usually set to 'so'.
3326 sockethdr (d_socket.U):
3327 This variable has any cpp '-I' flags needed for socket support.
3329 socketlib (d_socket.U):
3330 This variable has the names of any libraries needed for socket support.
3332 socksizetype (socksizetype.U):
3333 This variable holds the type used for the size argument
3334 for various socket calls like accept. Usual values include
3335 socklen_t, size_t, and int.
3338 This variable is used internally by Configure to determine the
3339 full pathname (if any) of the sort program. After Configure runs,
3340 the value is reset to a plain "sort" and is not useful.
3342 spackage (package.U):
3343 This variable contains the name of the package being constructed,
3344 with the first letter uppercased, i.e. suitable for starting
3347 spitshell (spitshell.U):
3348 This variable contains the command necessary to spit out a runnable
3349 shell on this system. It is either cat or a grep '-v' for # comments.
3351 sPRId64 (quadfio.U):
3352 This variable, if defined, contains the string used by stdio to
3353 format 64-bit decimal numbers (format 'd') for output.
3355 sPRIeldbl (longdblfio.U):
3356 This variable, if defined, contains the string used by stdio to
3357 format long doubles (format 'e') for output.
3359 sPRIEUldbl (longdblfio.U):
3360 This variable, if defined, contains the string used by stdio to
3361 format long doubles (format 'E') for output.
3362 The 'U' in the name is to separate this from sPRIeldbl so that even
3363 case-blind systems can see the difference.
3365 sPRIfldbl (longdblfio.U):
3366 This variable, if defined, contains the string used by stdio to
3367 format long doubles (format 'f') for output.
3369 sPRIFUldbl (longdblfio.U):
3370 This variable, if defined, contains the string used by stdio to
3371 format long doubles (format 'F') for output.
3372 The 'U' in the name is to separate this from sPRIfldbl so that even
3373 case-blind systems can see the difference.
3375 sPRIgldbl (longdblfio.U):
3376 This variable, if defined, contains the string used by stdio to
3377 format long doubles (format 'g') for output.
3379 sPRIGUldbl (longdblfio.U):
3380 This variable, if defined, contains the string used by stdio to
3381 format long doubles (format 'G') for output.
3382 The 'U' in the name is to separate this from sPRIgldbl so that even
3383 case-blind systems can see the difference.
3385 sPRIi64 (quadfio.U):
3386 This variable, if defined, contains the string used by stdio to
3387 format 64-bit decimal numbers (format 'i') for output.
3389 sPRIo64 (quadfio.U):
3390 This variable, if defined, contains the string used by stdio to
3391 format 64-bit octal numbers (format 'o') for output.
3393 sPRIu64 (quadfio.U):
3394 This variable, if defined, contains the string used by stdio to
3395 format 64-bit unsigned decimal numbers (format 'u') for output.
3397 sPRIx64 (quadfio.U):
3398 This variable, if defined, contains the string used by stdio to
3399 format 64-bit hexadecimal numbers (format 'x') for output.
3401 sPRIXU64 (quadfio.U):
3402 This variable, if defined, contains the string used by stdio to
3403 format 64-bit hExADECimAl numbers (format 'X') for output.
3404 The 'U' in the name is to separate this from sPRIx64 so that even
3405 case-blind systems can see the difference.
3408 This variable holds the path to the package source. It is up to
3409 the Makefile to use this variable and set VPATH accordingly to
3410 find the sources remotely.
3412 sSCNfldbl (longdblfio.U):
3413 This variable, if defined, contains the string used by stdio to
3414 format long doubles (format 'f') for input.
3416 ssizetype (ssizetype.U):
3417 This variable defines ssizetype to be something like ssize_t,
3418 long or int. It is used by functions that return a count
3419 of bytes or an error condition. It must be a signed type.
3420 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3422 startperl (startperl.U):
3423 This variable contains the string to put on the front of a perl
3424 script to make sure (hopefully) that it runs with perl and not some
3425 shell. Of course, that leading line must be followed by the classical
3427 eval 'exec perl -S $0 ${1+"$@"}'
3428 if $running_under_some_shell;
3429 to guarantee perl startup should the shell execute the script. Note
3430 that this magic incatation is not understood by csh.
3432 startsh (startsh.U):
3433 This variable contains the string to put on the front of a shell
3434 script to make sure (hopefully) that it runs with sh and not some
3437 static_ext (Extensions.U):
3438 This variable holds a list of XS extension files we want to
3439 link statically into the package. It is used by Makefile.
3441 stdchar (stdchar.U):
3442 This variable conditionally defines STDCHAR to be the type of char
3443 used in stdio.h. It has the values "unsigned char" or "char".
3445 stdio_base (d_stdstdio.U):
3446 This variable defines how, given a FILE pointer, fp, to access the
3447 _base field (or equivalent) of stdio.h's FILE structure. This will
3448 be used to define the macro FILE_base(fp).
3450 stdio_bufsiz (d_stdstdio.U):
3451 This variable defines how, given a FILE pointer, fp, to determine
3452 the number of bytes store in the I/O buffer pointer to by the
3453 _base field (or equivalent) of stdio.h's FILE structure. This will
3454 be used to define the macro FILE_bufsiz(fp).
3456 stdio_cnt (d_stdstdio.U):
3457 This variable defines how, given a FILE pointer, fp, to access the
3458 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3459 be used to define the macro FILE_cnt(fp).
3461 stdio_filbuf (d_stdstdio.U):
3462 This variable defines how, given a FILE pointer, fp, to tell
3463 stdio to refill it's internal buffers (?). This will
3464 be used to define the macro FILE_filbuf(fp).
3466 stdio_ptr (d_stdstdio.U):
3467 This variable defines how, given a FILE pointer, fp, to access the
3468 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3469 be used to define the macro FILE_ptr(fp).
3471 stdio_stream_array (stdio_streams.U):
3472 This variable tells the name of the array holding the stdio streams.
3473 Usual values include _iob, __iob, and __sF.
3475 strings (i_string.U):
3476 This variable holds the full path of the string header that will be
3477 used. Typically /usr/include/string.h or /usr/include/strings.h.
3480 This variable is defined but not used by Configure.
3481 The value is a plain '' and is not useful.
3483 subversion (patchlevel.U):
3484 The subversion level of this package.
3485 The value of subversion comes from the patchlevel.h file.
3486 In a version number such as 5.6.1, this is the "1".
3487 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3488 This is unique to perl.
3491 This variable holds the place where the manual is located on this
3492 system. It is not the place where the user wants to put his manual
3493 pages. Rather it is the place where Configure may look to find manual
3494 for unix commands (section 1 of the manual usually). See mansrc.
3497 This variable is defined but not used by Configure.
3498 The value is a plain '' and is not useful.
3501 This variable is defined but not used by Configure.
3502 The value is a plain '' and is not useful.
3505 This variable is defined but not used by Configure.
3506 The value is a plain '' and is not useful.
3509 This variable is defined but not used by Configure.
3510 The value is a plain '' and is not useful.
3513 This variable is used internally by Configure to determine the
3514 full pathname (if any) of the test program. After Configure runs,
3515 the value is reset to a plain "test" and is not useful.
3517 timeincl (i_time.U):
3518 This variable holds the full path of the included time header(s).
3520 timetype (d_time.U):
3521 This variable holds the type returned by time(). It can be long,
3522 or time_t on BSD sites (in which case <sys/types.h> should be
3523 included). Anyway, the type Time_t should be used.
3526 This variable is used internally by Configure to determine the
3527 full pathname (if any) of the touch program. After Configure runs,
3528 the value is reset to a plain "touch" and is not useful.
3531 This variable is used internally by Configure to determine the
3532 full pathname (if any) of the tr program. After Configure runs,
3533 the value is reset to a plain "tr" and is not useful.
3536 This variable contains the value to be passed to the tr(1)
3537 command to transliterate a newline. Typical values are
3538 '\012' and '\n'. This is needed for EBCDIC systems where
3539 newline is not necessarily '\012'.
3542 This variable is defined but not used by Configure.
3543 The value is a plain '' and is not useful.
3546 This variable is the size of an U16 in bytes.
3549 This variable contains the C type used for Perl's U16.
3552 This variable is the size of an U32 in bytes.
3555 This variable contains the C type used for Perl's U32.
3558 This variable is the size of an U64 in bytes.
3561 This variable contains the C type used for Perl's U64.
3564 This variable is the size of an U8 in bytes.
3567 This variable contains the C type used for Perl's U8.
3570 This variable contains the format string used for printing a Uid_t.
3572 uidsign (uidsign.U):
3573 This variable contains the signedness of a uidtype.
3574 1 for unsigned, -1 for signed.
3576 uidsize (uidsize.U):
3577 This variable contains the size of a uidtype in bytes.
3579 uidtype (uidtype.U):
3580 This variable defines Uid_t to be something like uid_t, int,
3581 ushort, or whatever type is used to declare user ids in the kernel.
3584 This variable is used internally by Configure to determine the
3585 full pathname (if any) of the uname program. After Configure runs,
3586 the value is reset to a plain "uname" and is not useful.
3589 This variable is used internally by Configure to determine the
3590 full pathname (if any) of the uniq program. After Configure runs,
3591 the value is reset to a plain "uniq" and is not useful.
3593 uquadtype (quadtype.U):
3594 This variable defines Uquad_t to be something like unsigned long,
3595 unsigned int, unsigned long long, uint64_t, or whatever type is
3596 used for 64-bit integers.
3598 use5005threads (usethreads.U):
3599 This variable conditionally defines the USE_5005THREADS symbol,
3600 and indicates that Perl should be built to use the 5.005-based
3601 threading implementation.
3603 use64bitall (use64bits.U):
3604 This variable conditionally defines the USE_64_BIT_ALL symbol,
3605 and indicates that 64-bit integer types should be used
3606 when available. The maximal possible
3607 64-bitness is employed: LP64 or ILP64, meaning that you will
3608 be able to use more than 2 gigabytes of memory. This mode is
3609 even more binary incompatible than USE_64_BIT_INT. You may not
3610 be able to run the resulting executable in a 32-bit CPU at all or
3611 you may need at least to reboot your OS to 64-bit mode.
3613 use64bitint (use64bits.U):
3614 This variable conditionally defines the USE_64_BIT_INT symbol,
3615 and indicates that 64-bit integer types should be used
3616 when available. The minimal possible 64-bitness
3617 is employed, just enough to get 64-bit integers into Perl.
3618 This may mean using for example "long longs", while your memory
3619 may still be limited to 2 gigabytes.
3622 This variable indicates if the system supports dynamic
3623 loading of some sort. See also dlsrc and dlobj.
3625 useithreads (usethreads.U):
3626 This variable conditionally defines the USE_ITHREADS symbol,
3627 and indicates that Perl should be built to use the interpreter-based
3628 threading implementation.
3630 uselargefiles (uselfs.U):
3631 This variable conditionally defines the USE_LARGE_FILES symbol,
3632 and indicates that large file interfaces should be used when
3635 uselongdouble (uselongdbl.U):
3636 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3637 and indicates that long doubles should be used when available.
3639 usemorebits (usemorebits.U):
3640 This variable conditionally defines the USE_MORE_BITS symbol,
3641 and indicates that explicit 64-bit interfaces and long doubles
3642 should be used when available.
3644 usemultiplicity (usemultiplicity.U):
3645 This variable conditionally defines the MULTIPLICITY symbol,
3646 and indicates that Perl should be built to use multiplicity.
3648 usemymalloc (mallocsrc.U):
3649 This variable contains y if the malloc that comes with this package
3650 is desired over the system's version of malloc. People often include
3651 special versions of malloc for effiency, but such versions are often
3652 less portable. See also mallocsrc and mallocobj.
3653 If this is 'y', then -lmalloc is removed from $libs.
3656 This variable contains 'true' or 'false' depending whether the
3657 nm extraction is wanted or not.
3659 useopcode (Extensions.U):
3660 This variable holds either 'true' or 'false' to indicate
3661 whether the Opcode extension should be used. The sole
3662 use for this currently is to allow an easy mechanism
3663 for users to skip the Opcode extension from the Configure
3666 useperlio (useperlio.U):
3667 This variable conditionally defines the USE_PERLIO symbol,
3668 and indicates that the PerlIO abstraction should be
3671 useposix (Extensions.U):
3672 This variable holds either 'true' or 'false' to indicate
3673 whether the POSIX extension should be used. The sole
3674 use for this currently is to allow an easy mechanism
3675 for hints files to indicate that POSIX will not compile
3676 on a particular system.
3679 This variable is set to true when the user agrees to use sfio.
3680 It is set to false when sfio is not available or when the user
3681 explicitely requests not to use sfio. It is here primarily so
3682 that command-line settings can override the auto-detection of
3683 d_sfio without running into a "WHOA THERE".
3685 useshrplib (libperl.U):
3686 This variable is set to 'yes' if the user wishes
3687 to build a shared libperl, and 'no' otherwise.
3689 usesocks (usesocks.U):
3690 This variable conditionally defines the USE_SOCKS symbol,
3691 and indicates that Perl should be built to use SOCKS.
3693 usethreads (usethreads.U):
3694 This variable conditionally defines the USE_THREADS symbol,
3695 and indicates that Perl should be built to use threads.
3697 usevendorprefix (vendorprefix.U):
3698 This variable tells whether the vendorprefix
3699 and consequently other vendor* paths are in use.
3701 usevfork (d_vfork.U):
3702 This variable is set to true when the user accepts to use vfork.
3703 It is set to false when no vfork is available or when the user
3704 explicitely requests not to use vfork.
3707 This variable holds the path of the include files, which is
3708 usually /usr/include. It is mainly used by other Configure units.
3711 This variable is defined but not used by Configure.
3712 The value is a plain '' and is not useful.
3714 uvoformat (perlxvf.U):
3715 This variable contains the format string used for printing
3716 a Perl UV as an unsigned octal integer.
3719 This variable is the size of a UV in bytes.
3722 This variable contains the C type used for Perl's UV.
3724 uvuformat (perlxvf.U):
3725 This variable contains the format string used for printing
3726 a Perl UV as an unsigned decimal integer.
3728 uvxformat (perlxvf.U):
3729 This variable contains the format string used for printing
3730 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3732 uvXUformat (perlxvf.U):
3733 This variable contains the format string used for printing
3734 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3736 vendorarch (vendorarch.U):
3737 This variable contains the value of the PERL_VENDORARCH symbol.
3738 It may have a ~ on the front.
3739 The standard distribution will put nothing in this directory.
3740 Vendors who distribute perl may wish to place their own
3741 architecture-dependent modules and extensions in this directory with
3742 MakeMaker Makefile.PL INSTALLDIRS=vendor
3743 or equivalent. See INSTALL for details.
3745 vendorarchexp (vendorarch.U):
3746 This variable is the ~name expanded version of vendorarch, so that you
3747 may use it directly in Makefiles or shell scripts.
3749 vendorbin (vendorbin.U):
3750 This variable contains the eventual value of the VENDORBIN symbol.
3751 It may have a ~ on the front.
3752 The standard distribution will put nothing in this directory.
3753 Vendors who distribute perl may wish to place additional
3754 binaries in this directory with
3755 MakeMaker Makefile.PL INSTALLDIRS=vendor
3756 or equivalent. See INSTALL for details.
3758 vendorbinexp (vendorbin.U):
3759 This variable is the ~name expanded version of vendorbin, so that you
3760 may use it directly in Makefiles or shell scripts.
3762 vendorlib (vendorlib.U):
3763 This variable contains the eventual value of the VENDORLIB symbol,
3764 which is the name of the private library for this package.
3765 The standard distribution will put nothing in this directory.
3766 Vendors who distribute perl may wish to place their own
3767 modules in this directory with
3768 MakeMaker Makefile.PL INSTALLDIRS=vendor
3769 or equivalent. See INSTALL for details.
3771 vendorlib_stem (vendorlib.U):
3772 This variable is $vendorlibexp with any trailing version-specific component
3773 removed. The elements in inc_version_list (inc_version_list.U) can
3774 be tacked onto this variable to generate a list of directories to search.
3776 vendorlibexp (vendorlib.U):
3777 This variable is the ~name expanded version of vendorlib, so that you
3778 may use it directly in Makefiles or shell scripts.
3780 vendorprefix (vendorprefix.U):
3781 This variable holds the full absolute path of the directory below
3782 which the vendor will install add-on packages.
3783 See INSTALL for usage and examples.
3785 vendorprefixexp (vendorprefix.U):
3786 This variable holds the full absolute path of the directory below
3787 which the vendor will install add-on packages. Derived from vendorprefix.
3789 version (patchlevel.U):
3790 The full version number of this package, such as 5.6.1 (or 5_6_1).
3791 This combines revision, patchlevel, and subversion to get the
3792 full version number, including any possible subversions.
3793 This is suitable for use as a directory name, and hence is
3794 filesystem dependent.
3796 versiononly (versiononly.U):
3797 If set, this symbol indicates that only the version-specific
3798 components of a perl installation should be installed.
3799 This may be useful for making a test installation of a new
3800 version without disturbing the existing installation.
3801 Setting versiononly is equivalent to setting installperl's -v option.
3802 In particular, the non-versioned scripts and programs such as
3803 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3804 (see INSTALL for a more complete list). Nor are the man
3806 Usually, this is undef.
3809 This variable is defined but not used by Configure.
3810 The value is a plain '' and is not useful.
3812 voidflags (voidflags.U):
3813 This variable contains the eventual value of the VOIDFLAGS symbol,
3814 which indicates how much support of the void type is given by this
3815 compiler. See VOIDFLAGS for more info.
3818 This variable holds extra path (space-separated) used to find
3819 libraries on this platform, for example CPU-specific libraries
3820 (on multi-CPU platforms) may be listed here.
3822 xs_apiversion (xs_apiversion.U):
3823 This variable contains the version of the oldest perl binary
3824 compatible with the present perl. perl.c:incpush() and
3825 lib/lib.pm will automatically search in $sitearch for older
3826 directories across major versions back to xs_apiversion.
3827 This is only useful if you have a perl library directory tree
3828 structured like the default one.
3829 See INSTALL for how this works.
3830 The versioned site_perl directory was introduced in 5.005,
3831 so that is the lowest possible value.
3832 Since this can depend on compile time options (such as
3833 bincompat) it is set by Configure. Other non-default sources
3834 of potential incompatibility, such as multiplicity, threads,
3835 debugging, 64bits, sfio, etc., are not checked for currently,
3836 though in principle we could go snooping around in old
3840 This variable holds the name of the compiler compiler we
3841 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3844 This variable contains any additional yacc flags desired by the
3845 user. It is up to the Makefile to use this.
3848 This variable is defined but not used by Configure.
3849 The value is a plain '' and is not useful.
3852 This variable is used internally by Configure to determine the
3853 full pathname (if any) of the zip program. After Configure runs,
3854 the value is reset to a plain "zip" and is not useful.