1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
122 This variable is used internally by Configure to determine the
123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
127 The base revision level of this package, from the .package file.
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
139 bincompat5005 (bincompat5005.U):
140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
153 This variable is used internally by Configure to determine the
154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
157 byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
168 castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
187 cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
203 ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
214 ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
218 The list is a space-separated list of symbol=value tokens.
220 ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
229 cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
237 charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
246 This variable is defined but not used by Configure.
247 The value is a plain '' and is not useful.
250 This variable is defined but not used by Configure.
251 The value is a plain '' and is not useful.
253 clocktype (d_times.U):
254 This variable holds the type returned by times(). It can be long,
255 or clock_t on BSD sites (in which case <sys/types.h> should be
259 This variable is used internally by Configure to determine the
260 full pathname (if any) of the comm program. After Configure runs,
261 the value is reset to a plain "comm" and is not useful.
264 This variable is defined but not used by Configure.
265 The value is a plain '' and is not useful.
267 contains (contains.U):
268 This variable holds the command to do a grep with a proper return
269 status. On most sane systems it is simply "grep". On insane systems
270 it is a grep followed by a cat followed by a test. This variable
271 is primarily for the use of other Configure units.
274 This variable is used internally by Configure to determine the
275 full pathname (if any) of the cp program. After Configure runs,
276 the value is reset to a plain "cp" and is not useful.
279 This variable is defined but not used by Configure.
280 The value is a plain '' and is not useful.
283 This variable is used internally by Configure to determine the
284 full pathname (if any) of the cpp program. After Configure runs,
285 the value is reset to a plain "cpp" and is not useful.
287 cpp_stuff (cpp_stuff.U):
288 This variable contains an identification of the catenation mechanism
289 used by the C preprocessor.
291 cppccsymbols (Cppsym.U):
292 The variable contains the symbols defined by the C compiler
293 when it calls cpp. The symbols defined by the cc alone or cpp
294 alone are not in this list, see ccsymbols and cppsymbols.
295 The list is a space-separated list of symbol=value tokens.
297 cppflags (ccflags.U):
298 This variable holds the flags that will be passed to the C pre-
299 processor. It is up to the Makefile to use it.
301 cpplast (cppstdin.U):
302 This variable has the same functionality as cppminus, only it applies
303 to cpprun and not cppstdin.
305 cppminus (cppstdin.U):
306 This variable contains the second part of the string which will invoke
307 the C preprocessor on the standard input and produce to standard
308 output. This variable will have the value "-" if cppstdin needs
309 a minus to specify standard input, otherwise the value is "".
312 This variable contains the command which will invoke a C preprocessor
313 on standard input and put the output to stdout. It is guaranteed not
314 to be a wrapper and may be a null string if no preprocessor can be
315 made directly available. This preprocessor might be different from the
316 one used by the C compiler. Don't forget to append cpplast after the
317 preprocessor options.
319 cppstdin (cppstdin.U):
320 This variable contains the command which will invoke the C
321 preprocessor on standard input and put the output to stdout.
322 It is primarily used by other Configure units that ask about
323 preprocessor symbols.
325 cppsymbols (Cppsym.U):
326 The variable contains the symbols defined by the C preprocessor
327 alone. The symbols defined by cc or by cc when it calls cpp are
328 not in this list, see ccsymbols and cppccsymbols.
329 The list is a space-separated list of symbol=value tokens.
331 crosscompile (crosscompile.U):
332 This variable conditionally defines the CROSSCOMPILE symbol
333 which signifies that the build process is be a cross-compilation.
334 This is normally set by hints files or from Configure command line.
336 cryptlib (d_crypt.U):
337 This variable holds -lcrypt or the path to a libcrypt.a archive if
338 the crypt() function is not defined in the standard C library. It is
339 up to the Makefile to use this.
342 This variable is used internally by Configure to determine the
343 full pathname (if any) of the csh program. After Configure runs,
344 the value is reset to a plain "csh" and is not useful.
346 d__fwalk (d__fwalk.U):
347 This variable conditionally defines HAS__FWALK if _fwalk() is
348 available to apply a function to all the file handles.
350 d_access (d_access.U):
351 This variable conditionally defines HAS_ACCESS if the access() system
352 call is available to check for access permissions using real IDs.
354 d_accessx (d_accessx.U):
355 This variable conditionally defines the HAS_ACCESSX symbol, which
356 indicates to the C program that the accessx() routine is available.
359 This variable conditionally defines the HAS_ALARM symbol, which
360 indicates to the C program that the alarm() routine is available.
362 d_archlib (archlib.U):
363 This variable conditionally defines ARCHLIB to hold the pathname
364 of architecture-dependent library files for $package. If
365 $archlib is the same as $privlib, then this is set to undef.
368 This variable conditionally defines the HAS_ATOLF symbol, which
369 indicates to the C program that the atolf() routine is available.
372 This variable conditionally defines the HAS_ATOLL symbol, which
373 indicates to the C program that the atoll() routine is available.
375 d_attribut (d_attribut.U):
376 This variable conditionally defines HASATTRIBUTE, which
377 indicates the C compiler can check for function attributes,
378 such as printf formats.
381 This variable conditionally defines the HAS_BCMP symbol if
382 the bcmp() routine is available to compare strings.
385 This variable conditionally defines the HAS_BCOPY symbol if
386 the bcopy() routine is available to copy strings.
388 d_bincompat5005 (bincompat5005.U):
389 This variable conditionally defines BINCOMPAT5005 so that embed.h
390 can take special action if this version of Perl should be
391 binary-compatible with Perl 5.005. This is impossible for builds
392 that use features like threads and multiplicity it is always $undef
396 This symbol conditionally defines the symbol BSD when running on a
399 d_bsdgetpgrp (d_getpgrp.U):
400 This variable conditionally defines USE_BSD_GETPGRP if
401 getpgrp needs one arguments whereas USG one needs none.
403 d_bsdsetpgrp (d_setpgrp.U):
404 This variable conditionally defines USE_BSD_SETPGRP if
405 setpgrp needs two arguments whereas USG one needs none.
406 See also d_setpgid for a POSIX interface.
409 This variable conditionally defines the HAS_BZERO symbol if
410 the bzero() routine is available to set memory to 0.
412 d_casti32 (d_casti32.U):
413 This variable conditionally defines CASTI32, which indicates
414 whether the C compiler can cast large floats to 32-bit ints.
416 d_castneg (d_castneg.U):
417 This variable conditionally defines CASTNEG, which indicates
418 wether the C compiler can cast negative float to unsigned.
420 d_charvspr (d_vprintf.U):
421 This variable conditionally defines CHARVSPRINTF if this system
422 has vsprintf returning type (char*). The trend seems to be to
423 declare it as "int vsprintf()".
426 This variable conditionally defines the HAS_CHOWN symbol, which
427 indicates to the C program that the chown() routine is available.
429 d_chroot (d_chroot.U):
430 This variable conditionally defines the HAS_CHROOT symbol, which
431 indicates to the C program that the chroot() routine is available.
433 d_chsize (d_chsize.U):
434 This variable conditionally defines the CHSIZE symbol, which
435 indicates to the C program that the chsize() routine is available
436 to truncate files. You might need a -lx to get this routine.
438 d_closedir (d_closedir.U):
439 This variable conditionally defines HAS_CLOSEDIR if closedir() is
442 d_cmsghdr_s (d_cmsghdr_s.U):
443 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
444 which indicates that the struct cmsghdr is supported.
447 This variable conditionally defines the HASCONST symbol, which
448 indicates to the C program that this C compiler knows about the
452 This variable conditionally defines the CRYPT symbol, which
453 indicates to the C program that the crypt() routine is available
454 to encrypt passwords and the like.
457 This variable conditionally defines the CSH symbol, which
458 indicates to the C program that the C-shell exists.
460 d_cuserid (d_cuserid.U):
461 This variable conditionally defines the HAS_CUSERID symbol, which
462 indicates to the C program that the cuserid() routine is available
463 to get character login names.
465 d_dbl_dig (d_dbl_dig.U):
466 This variable conditionally defines d_dbl_dig if this system's
467 header files provide DBL_DIG, which is the number of significant
468 digits in a double precision number.
470 d_difftime (d_difftime.U):
471 This variable conditionally defines the HAS_DIFFTIME symbol, which
472 indicates to the C program that the difftime() routine is available.
474 d_dirnamlen (i_dirent.U):
475 This variable conditionally defines DIRNAMLEN, which indicates
476 to the C program that the length of directory entry names is
477 provided by a d_namelen field.
479 d_dlerror (d_dlerror.U):
480 This variable conditionally defines the HAS_DLERROR symbol, which
481 indicates to the C program that the dlerror() routine is available.
483 d_dlopen (d_dlopen.U):
484 This variable conditionally defines the HAS_DLOPEN symbol, which
485 indicates to the C program that the dlopen() routine is available.
487 d_dlsymun (d_dlsymun.U):
488 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
489 indicates that we need to prepend an underscore to the symbol
490 name before calling dlsym().
492 d_dosuid (d_dosuid.U):
493 This variable conditionally defines the symbol DOSUID, which
494 tells the C program that it should insert setuid emulation code
495 on hosts which have setuid #! scripts disabled.
497 d_drand48proto (d_drand48proto.U):
498 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
499 which indicates to the C program that the system provides
500 a prototype for the drand48() function. Otherwise, it is
501 up to the program to supply one.
504 This variable conditionally defines HAS_DUP2 if dup2() is
505 available to duplicate file descriptors.
507 d_eaccess (d_eaccess.U):
508 This variable conditionally defines the HAS_EACCESS symbol, which
509 indicates to the C program that the eaccess() routine is available.
511 d_endgrent (d_endgrent.U):
512 This variable conditionally defines the HAS_ENDGRENT symbol, which
513 indicates to the C program that the endgrent() routine is available
514 for sequential access of the group database.
516 d_endhent (d_endhent.U):
517 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
518 available to close whatever was being used for host queries.
520 d_endnent (d_endnent.U):
521 This variable conditionally defines HAS_ENDNETENT if endnetent() is
522 available to close whatever was being used for network queries.
524 d_endpent (d_endpent.U):
525 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
526 available to close whatever was being used for protocol queries.
528 d_endpwent (d_endpwent.U):
529 This variable conditionally defines the HAS_ENDPWENT symbol, which
530 indicates to the C program that the endpwent() routine is available
531 for sequential access of the passwd database.
533 d_endsent (d_endsent.U):
534 This variable conditionally defines HAS_ENDSERVENT if endservent() is
535 available to close whatever was being used for service queries.
537 d_eofnblk (nblock_io.U):
538 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
539 when reading from a non-blocking I/O source.
542 This variable conditionally defines the symbols EUNICE and VAX, which
543 alerts the C program that it must deal with ideosyncracies of VMS.
545 d_fchmod (d_fchmod.U):
546 This variable conditionally defines the HAS_FCHMOD symbol, which
547 indicates to the C program that the fchmod() routine is available
548 to change mode of opened files.
550 d_fchown (d_fchown.U):
551 This variable conditionally defines the HAS_FCHOWN symbol, which
552 indicates to the C program that the fchown() routine is available
553 to change ownership of opened files.
556 This variable conditionally defines the HAS_FCNTL symbol, and indicates
557 whether the fcntl() function exists
559 d_fcntl_can_lock (d_fcntl_can_lock.U):
560 This variable conditionally defines the FCNTL_CAN_LOCK symbol
561 and indicates whether file locking with fcntl() works.
563 d_fd_macros (d_fd_set.U):
564 This variable contains the eventual value of the HAS_FD_MACROS symbol,
565 which indicates if your C compiler knows about the macros which
566 manipulate an fd_set.
568 d_fd_set (d_fd_set.U):
569 This variable contains the eventual value of the HAS_FD_SET symbol,
570 which indicates if your C compiler knows about the fd_set typedef.
572 d_fds_bits (d_fd_set.U):
573 This variable contains the eventual value of the HAS_FDS_BITS symbol,
574 which indicates if your fd_set typedef contains the fds_bits member.
575 If you have an fd_set typedef, but the dweebs who installed it did
576 a half-fast job and neglected to provide the macros to manipulate
577 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
579 d_fgetpos (d_fgetpos.U):
580 This variable conditionally defines HAS_FGETPOS if fgetpos() is
581 available to get the file position indicator.
583 d_flexfnam (d_flexfnam.U):
584 This variable conditionally defines the FLEXFILENAMES symbol, which
585 indicates that the system supports filenames longer than 14 characters.
588 This variable conditionally defines HAS_FLOCK if flock() is
589 available to do file locking.
592 This variable conditionally defines the HAS_FORK symbol, which
593 indicates to the C program that the fork() routine is available.
595 d_fpathconf (d_pathconf.U):
596 This variable conditionally defines the HAS_FPATHCONF symbol, which
597 indicates to the C program that the pathconf() routine is available
598 to determine file-system related limits and options associated
599 with a given open file descriptor.
601 d_fpos64_t (d_fpos64_t.U):
602 This symbol will be defined if the C compiler supports fpos64_t.
604 d_frexpl (d_frexpl.U):
605 This variable conditionally defines the HAS_FREXPL symbol, which
606 indicates to the C program that the frexpl() routine is available.
608 d_fs_data_s (d_fs_data_s.U):
609 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
610 which indicates that the struct fs_data is supported.
612 d_fseeko (d_fseeko.U):
613 This variable conditionally defines the HAS_FSEEKO symbol, which
614 indicates to the C program that the fseeko() routine is available.
616 d_fsetpos (d_fsetpos.U):
617 This variable conditionally defines HAS_FSETPOS if fsetpos() is
618 available to set the file position indicator.
620 d_fstatfs (d_fstatfs.U):
621 This variable conditionally defines the HAS_FSTATFS symbol, which
622 indicates to the C program that the fstatfs() routine is available.
624 d_fstatvfs (d_statvfs.U):
625 This variable conditionally defines the HAS_FSTATVFS symbol, which
626 indicates to the C program that the fstatvfs() routine is available.
629 This variable conditionally defines the HAS_FSYNC symbol, which
630 indicates to the C program that the fsync() routine is available.
632 d_ftello (d_ftello.U):
633 This variable conditionally defines the HAS_FTELLO symbol, which
634 indicates to the C program that the ftello() routine is available.
637 This variable conditionally defines the HAS_FTIME symbol, which indicates
638 that the ftime() routine exists. The ftime() routine is basically
639 a sub-second accuracy clock.
641 d_Gconvert (d_gconvert.U):
642 This variable holds what Gconvert is defined as to convert
643 floating point numbers into strings. It could be 'gconvert'
644 or a more complex macro emulating gconvert with gcvt() or sprintf.
646 d_Gconvert='gconvert((x),(n),(t),(b))'
647 d_Gconvert='gcvt((x),(n),(b))'
648 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
650 d_getcwd (d_getcwd.U):
651 This variable conditionally defines the HAS_GETCWD symbol, which
652 indicates to the C program that the getcwd() routine is available
653 to get the current working directory.
655 d_getespwnam (d_getespwnam.U):
656 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
657 available to retrieve enchanced (shadow) password entries by name.
659 d_getfsstat (d_getfsstat.U):
660 This variable conditionally defines the HAS_GETFSSTAT symbol, which
661 indicates to the C program that the getfsstat() routine is available.
663 d_getgrent (d_getgrent.U):
664 This variable conditionally defines the HAS_GETGRENT symbol, which
665 indicates to the C program that the getgrent() routine is available
666 for sequential access of the group database.
668 d_getgrps (d_getgrps.U):
669 This variable conditionally defines the HAS_GETGROUPS symbol, which
670 indicates to the C program that the getgroups() routine is available
671 to get the list of process groups.
673 d_gethbyaddr (d_gethbyad.U):
674 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
675 indicates to the C program that the gethostbyaddr() routine is available
676 to look up hosts by their IP addresses.
678 d_gethbyname (d_gethbynm.U):
679 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
680 indicates to the C program that the gethostbyname() routine is available
681 to look up host names in some data base or other.
683 d_gethent (d_gethent.U):
684 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
685 available to look up host names in some data base or another.
687 d_gethname (d_gethname.U):
688 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
689 indicates to the C program that the gethostname() routine may be
690 used to derive the host name.
692 d_gethostprotos (d_gethostprotos.U):
693 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
694 which indicates to the C program that <netdb.h> supplies
695 prototypes for the various gethost*() functions.
696 See also netdbtype.U for probing for various netdb types.
698 d_getitimer (d_getitimer.U):
699 This variable conditionally defines the HAS_GETITIMER symbol, which
700 indicates to the C program that the getitimer() routine is available.
702 d_getlogin (d_getlogin.U):
703 This variable conditionally defines the HAS_GETLOGIN symbol, which
704 indicates to the C program that the getlogin() routine is available
705 to get the login name.
707 d_getmnt (d_getmnt.U):
708 This variable conditionally defines the HAS_GETMNT symbol, which
709 indicates to the C program that the getmnt() routine is available
710 to retrieve one or more mount info blocks by filename.
712 d_getmntent (d_getmntent.U):
713 This variable conditionally defines the HAS_GETMNTENT symbol, which
714 indicates to the C program that the getmntent() routine is available
715 to iterate through mounted files to get their mount info.
717 d_getnbyaddr (d_getnbyad.U):
718 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
719 indicates to the C program that the getnetbyaddr() routine is available
720 to look up networks by their IP addresses.
722 d_getnbyname (d_getnbynm.U):
723 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
724 indicates to the C program that the getnetbyname() routine is available
725 to look up networks by their names.
727 d_getnent (d_getnent.U):
728 This variable conditionally defines HAS_GETNETENT if getnetent() is
729 available to look up network names in some data base or another.
731 d_getnetprotos (d_getnetprotos.U):
732 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
733 which indicates to the C program that <netdb.h> supplies
734 prototypes for the various getnet*() functions.
735 See also netdbtype.U for probing for various netdb types.
737 d_getpagsz (d_getpagsz.U):
738 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
739 is available to get the system page size.
741 d_getpbyname (d_getprotby.U):
742 This variable conditionally defines the HAS_GETPROTOBYNAME
743 symbol, which indicates to the C program that the
744 getprotobyname() routine is available to look up protocols
747 d_getpbynumber (d_getprotby.U):
748 This variable conditionally defines the HAS_GETPROTOBYNUMBER
749 symbol, which indicates to the C program that the
750 getprotobynumber() routine is available to look up protocols
753 d_getpent (d_getpent.U):
754 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
755 available to look up protocols in some data base or another.
757 d_getpgid (d_getpgid.U):
758 This variable conditionally defines the HAS_GETPGID symbol, which
759 indicates to the C program that the getpgid(pid) function
760 is available to get the process group id.
762 d_getpgrp2 (d_getpgrp2.U):
763 This variable conditionally defines the HAS_GETPGRP2 symbol, which
764 indicates to the C program that the getpgrp2() (as in DG/UX) routine
765 is available to get the current process group.
767 d_getpgrp (d_getpgrp.U):
768 This variable conditionally defines HAS_GETPGRP if getpgrp() is
769 available to get the current process group.
771 d_getppid (d_getppid.U):
772 This variable conditionally defines the HAS_GETPPID symbol, which
773 indicates to the C program that the getppid() routine is available
774 to get the parent process ID.
776 d_getprior (d_getprior.U):
777 This variable conditionally defines HAS_GETPRIORITY if getpriority()
778 is available to get a process's priority.
780 d_getprotoprotos (d_getprotoprotos.U):
781 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
782 which indicates to the C program that <netdb.h> supplies
783 prototypes for the various getproto*() functions.
784 See also netdbtype.U for probing for various netdb types.
786 d_getprpwnam (d_getprpwnam.U):
787 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
788 available to retrieve protected (shadow) password entries by name.
790 d_getpwent (d_getpwent.U):
791 This variable conditionally defines the HAS_GETPWENT symbol, which
792 indicates to the C program that the getpwent() routine is available
793 for sequential access of the passwd database.
795 d_getsbyname (d_getsrvby.U):
796 This variable conditionally defines the HAS_GETSERVBYNAME
797 symbol, which indicates to the C program that the
798 getservbyname() routine is available to look up services
801 d_getsbyport (d_getsrvby.U):
802 This variable conditionally defines the HAS_GETSERVBYPORT
803 symbol, which indicates to the C program that the
804 getservbyport() routine is available to look up services
807 d_getsent (d_getsent.U):
808 This variable conditionally defines HAS_GETSERVENT if getservent() is
809 available to look up network services in some data base or another.
811 d_getservprotos (d_getservprotos.U):
812 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
813 which indicates to the C program that <netdb.h> supplies
814 prototypes for the various getserv*() functions.
815 See also netdbtype.U for probing for various netdb types.
817 d_getspnam (d_getspnam.U):
818 This variable conditionally defines HAS_GETSPNAM if getspnam() is
819 available to retrieve SysV shadow password entries by name.
821 d_gettimeod (d_ftime.U):
822 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
823 indicates that the gettimeofday() system call exists (to obtain a
824 sub-second accuracy clock). You should probably include <sys/resource.h>.
826 d_gnulibc (d_gnulibc.U):
827 Defined if we're dealing with the GNU C Library.
829 d_grpasswd (i_grp.U):
830 This variable conditionally defines GRPASSWD, which indicates
831 that struct group in <grp.h> contains gr_passwd.
833 d_hasmntopt (d_hasmntopt.U):
834 This variable conditionally defines the HAS_HASMNTOPT symbol, which
835 indicates to the C program that the hasmntopt() routine is available
836 to query the mount options of file systems.
839 This variable conditionally defines HAS_HTONL if htonl() and its
840 friends are available to do network order byte swapping.
843 This variable conditionally defines the HAS_ICONV symbol, which
844 indicates to the C program that the iconv() routine is available.
846 d_index (d_strchr.U):
847 This variable conditionally defines HAS_INDEX if index() and
848 rindex() are available for string searching.
850 d_inetaton (d_inetaton.U):
851 This variable conditionally defines the HAS_INET_ATON symbol, which
852 indicates to the C program that the inet_aton() function is available
853 to parse IP address "dotted-quad" strings.
855 d_int64_t (d_int64_t.U):
856 This symbol will be defined if the C compiler supports int64_t.
858 d_isascii (d_isascii.U):
859 This variable conditionally defines the HAS_ISASCII constant,
860 which indicates to the C program that isascii() is available.
863 This variable conditionally defines the HAS_ISNAN symbol, which
864 indicates to the C program that the isnan() routine is available.
866 d_isnanl (d_isnanl.U):
867 This variable conditionally defines the HAS_ISNANL symbol, which
868 indicates to the C program that the isnanl() routine is available.
870 d_killpg (d_killpg.U):
871 This variable conditionally defines the HAS_KILLPG symbol, which
872 indicates to the C program that the killpg() routine is available
873 to kill process groups.
875 d_lchown (d_lchown.U):
876 This variable conditionally defines the HAS_LCHOWN symbol, which
877 indicates to the C program that the lchown() routine is available
878 to operate on a symbolic link (instead of following the link).
880 d_ldbl_dig (d_ldbl_dig.U):
881 This variable conditionally defines d_ldbl_dig if this system's
882 header files provide LDBL_DIG, which is the number of significant
883 digits in a long double precision number.
886 This variable conditionally defines HAS_LINK if link() is
887 available to create hard links.
889 d_locconv (d_locconv.U):
890 This variable conditionally defines HAS_LOCALECONV if localeconv() is
891 available for numeric and monetary formatting conventions.
894 This variable conditionally defines HAS_LOCKF if lockf() is
895 available to do file locking.
897 d_longdbl (d_longdbl.U):
898 This variable conditionally defines HAS_LONG_DOUBLE if
899 the long double type is supported.
901 d_longlong (d_longlong.U):
902 This variable conditionally defines HAS_LONG_LONG if
903 the long long type is supported.
905 d_lseekproto (d_lseekproto.U):
906 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
907 which indicates to the C program that the system provides
908 a prototype for the lseek() function. Otherwise, it is
909 up to the program to supply one.
912 This variable conditionally defines HAS_LSTAT if lstat() is
913 available to do file stats on symbolic links.
915 d_madvise (d_madvise.U):
916 This variable conditionally defines HAS_MADVISE if madvise() is
917 available to map a file into memory.
920 This variable conditionally defines the HAS_MBLEN symbol, which
921 indicates to the C program that the mblen() routine is available
922 to find the number of bytes in a multibye character.
924 d_mbstowcs (d_mbstowcs.U):
925 This variable conditionally defines the HAS_MBSTOWCS symbol, which
926 indicates to the C program that the mbstowcs() routine is available
927 to convert a multibyte string into a wide character string.
929 d_mbtowc (d_mbtowc.U):
930 This variable conditionally defines the HAS_MBTOWC symbol, which
931 indicates to the C program that the mbtowc() routine is available
932 to convert multibyte to a wide character.
934 d_memchr (d_memchr.U):
935 This variable conditionally defines the HAS_MEMCHR symbol, which
936 indicates to the C program that the memchr() routine is available
937 to locate characters within a C string.
939 d_memcmp (d_memcmp.U):
940 This variable conditionally defines the HAS_MEMCMP symbol, which
941 indicates to the C program that the memcmp() routine is available
942 to compare blocks of memory.
944 d_memcpy (d_memcpy.U):
945 This variable conditionally defines the HAS_MEMCPY symbol, which
946 indicates to the C program that the memcpy() routine is available
947 to copy blocks of memory.
949 d_memmove (d_memmove.U):
950 This variable conditionally defines the HAS_MEMMOVE symbol, which
951 indicates to the C program that the memmove() routine is available
952 to copy potentatially overlapping blocks of memory.
954 d_memset (d_memset.U):
955 This variable conditionally defines the HAS_MEMSET symbol, which
956 indicates to the C program that the memset() routine is available
957 to set blocks of memory.
960 This variable conditionally defines the HAS_MKDIR symbol, which
961 indicates to the C program that the mkdir() routine is available
962 to create directories..
964 d_mkdtemp (d_mkdtemp.U):
965 This variable conditionally defines the HAS_MKDTEMP symbol, which
966 indicates to the C program that the mkdtemp() routine is available
967 to exclusively create a uniquely named temporary directory.
969 d_mkfifo (d_mkfifo.U):
970 This variable conditionally defines the HAS_MKFIFO symbol, which
971 indicates to the C program that the mkfifo() routine is available.
973 d_mkstemp (d_mkstemp.U):
974 This variable conditionally defines the HAS_MKSTEMP symbol, which
975 indicates to the C program that the mkstemp() routine is available
976 to exclusively create and open a uniquely named temporary file.
978 d_mkstemps (d_mkstemps.U):
979 This variable conditionally defines the HAS_MKSTEMPS symbol, which
980 indicates to the C program that the mkstemps() routine is available
981 to exclusively create and open a uniquely named (with a suffix)
984 d_mktime (d_mktime.U):
985 This variable conditionally defines the HAS_MKTIME symbol, which
986 indicates to the C program that the mktime() routine is available.
989 This variable conditionally defines HAS_MMAP if mmap() is
990 available to map a file into memory.
993 This variable conditionally defines the HAS_MODFL symbol, which
994 indicates to the C program that the modfl() routine is available.
996 d_mprotect (d_mprotect.U):
997 This variable conditionally defines HAS_MPROTECT if mprotect() is
998 available to modify the access protection of a memory mapped file.
1001 This variable conditionally defines the HAS_MSG symbol, which
1002 indicates that the entire msg*(2) library is present.
1004 d_msg_ctrunc (d_socket.U):
1005 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1006 which indicates that the MSG_CTRUNC is available. #ifdef is
1007 not enough because it may be an enum, glibc has been known to do this.
1009 d_msg_dontroute (d_socket.U):
1010 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1011 which indicates that the MSG_DONTROUTE is available. #ifdef is
1012 not enough because it may be an enum, glibc has been known to do this.
1014 d_msg_oob (d_socket.U):
1015 This variable conditionally defines the HAS_MSG_OOB symbol,
1016 which indicates that the MSG_OOB is available. #ifdef is
1017 not enough because it may be an enum, glibc has been known to do this.
1019 d_msg_peek (d_socket.U):
1020 This variable conditionally defines the HAS_MSG_PEEK symbol,
1021 which indicates that the MSG_PEEK is available. #ifdef is
1022 not enough because it may be an enum, glibc has been known to do this.
1024 d_msg_proxy (d_socket.U):
1025 This variable conditionally defines the HAS_MSG_PROXY symbol,
1026 which indicates that the MSG_PROXY is available. #ifdef is
1027 not enough because it may be an enum, glibc has been known to do this.
1029 d_msgctl (d_msgctl.U):
1030 This variable conditionally defines the HAS_MSGCTL symbol, which
1031 indicates to the C program that the msgctl() routine is available.
1033 d_msgget (d_msgget.U):
1034 This variable conditionally defines the HAS_MSGGET symbol, which
1035 indicates to the C program that the msgget() routine is available.
1037 d_msghdr_s (d_msghdr_s.U):
1038 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1039 which indicates that the struct msghdr is supported.
1041 d_msgrcv (d_msgrcv.U):
1042 This variable conditionally defines the HAS_MSGRCV symbol, which
1043 indicates to the C program that the msgrcv() routine is available.
1045 d_msgsnd (d_msgsnd.U):
1046 This variable conditionally defines the HAS_MSGSND symbol, which
1047 indicates to the C program that the msgsnd() routine is available.
1049 d_msync (d_msync.U):
1050 This variable conditionally defines HAS_MSYNC if msync() is
1051 available to synchronize a mapped file.
1053 d_munmap (d_munmap.U):
1054 This variable conditionally defines HAS_MUNMAP if munmap() is
1055 available to unmap a region mapped by mmap().
1057 d_mymalloc (mallocsrc.U):
1058 This variable conditionally defines MYMALLOC in case other parts
1059 of the source want to take special action if MYMALLOC is used.
1060 This may include different sorts of profiling or error detection.
1063 This variable conditionally defines the HAS_NICE symbol, which
1064 indicates to the C program that the nice() routine is available.
1066 d_nv_preserves_uv (perlxv.U):
1067 This variable indicates whether a variable of type nvtype
1068 can preserve all the bits a variable of type uvtype.
1070 d_nv_preserves_uv_bits (perlxv.U):
1071 This variable indicates how many of bits type uvtype
1072 a variable nvtype can preserve.
1074 d_off64_t (d_off64_t.U):
1075 This symbol will be defined if the C compiler supports off64_t.
1077 d_old_pthread_create_joinable (d_pthrattrj.U):
1078 This variable conditionally defines pthread_create_joinable.
1079 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1081 d_oldpthreads (usethreads.U):
1082 This variable conditionally defines the OLD_PTHREADS_API symbol,
1083 and indicates that Perl should be built to use the old
1084 draft POSIX threads API. This is only potentially meaningful if
1087 d_oldsock (d_socket.U):
1088 This variable conditionally defines the OLDSOCKET symbol, which
1089 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1091 d_open3 (d_open3.U):
1092 This variable conditionally defines the HAS_OPEN3 manifest constant,
1093 which indicates to the C program that the 3 argument version of
1094 the open(2) function is available.
1096 d_pathconf (d_pathconf.U):
1097 This variable conditionally defines the HAS_PATHCONF symbol, which
1098 indicates to the C program that the pathconf() routine is available
1099 to determine file-system related limits and options associated
1100 with a given filename.
1102 d_pause (d_pause.U):
1103 This variable conditionally defines the HAS_PAUSE symbol, which
1104 indicates to the C program that the pause() routine is available
1105 to suspend a process until a signal is received.
1107 d_perl_otherlibdirs (otherlibdirs.U):
1108 This variable conditionally defines PERL_OTHERLIBDIRS, which
1109 contains a colon-separated set of paths for the perl binary to
1110 include in @INC. See also otherlibdirs.
1112 d_phostname (d_gethname.U):
1113 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1114 contains the shell command which, when fed to popen(), may be
1115 used to derive the host name.
1118 This variable conditionally defines the HAS_PIPE symbol, which
1119 indicates to the C program that the pipe() routine is available
1120 to create an inter-process channel.
1123 This variable conditionally defines the HAS_POLL symbol, which
1124 indicates to the C program that the poll() routine is available
1125 to poll active file descriptors.
1127 d_portable (d_portable.U):
1128 This variable conditionally defines the PORTABLE symbol, which
1129 indicates to the C program that it should not assume that it is
1130 running on the machine it was compiled on.
1132 d_PRId64 (quadfio.U):
1133 This variable conditionally defines the PERL_PRId64 symbol, which
1134 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1136 d_PRIeldbl (longdblfio.U):
1137 This variable conditionally defines the PERL_PRIfldbl symbol, which
1138 indiciates that stdio has a symbol to print long doubles.
1140 d_PRIEUldbl (longdblfio.U):
1141 This variable conditionally defines the PERL_PRIfldbl symbol, which
1142 indiciates that stdio has a symbol to print long doubles.
1143 The 'U' in the name is to separate this from d_PRIeldbl so that even
1144 case-blind systems can see the difference.
1146 d_PRIfldbl (longdblfio.U):
1147 This variable conditionally defines the PERL_PRIfldbl symbol, which
1148 indiciates that stdio has a symbol to print long doubles.
1150 d_PRIFUldbl (longdblfio.U):
1151 This variable conditionally defines the PERL_PRIfldbl symbol, which
1152 indiciates that stdio has a symbol to print long doubles.
1153 The 'U' in the name is to separate this from d_PRIfldbl so that even
1154 case-blind systems can see the difference.
1156 d_PRIgldbl (longdblfio.U):
1157 This variable conditionally defines the PERL_PRIfldbl symbol, which
1158 indiciates that stdio has a symbol to print long doubles.
1160 d_PRIGUldbl (longdblfio.U):
1161 This variable conditionally defines the PERL_PRIfldbl symbol, which
1162 indiciates that stdio has a symbol to print long doubles.
1163 The 'U' in the name is to separate this from d_PRIgldbl so that even
1164 case-blind systems can see the difference.
1166 d_PRIi64 (quadfio.U):
1167 This variable conditionally defines the PERL_PRIi64 symbol, which
1168 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1170 d_PRIo64 (quadfio.U):
1171 This variable conditionally defines the PERL_PRIo64 symbol, which
1172 indiciates that stdio has a symbol to print 64-bit octal numbers.
1174 d_PRIu64 (quadfio.U):
1175 This variable conditionally defines the PERL_PRIu64 symbol, which
1176 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1179 d_PRIx64 (quadfio.U):
1180 This variable conditionally defines the PERL_PRIx64 symbol, which
1181 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1183 d_PRIXU64 (quadfio.U):
1184 This variable conditionally defines the PERL_PRIXU64 symbol, which
1185 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1186 The 'U' in the name is to separate this from d_PRIx64 so that even
1187 case-blind systems can see the difference.
1189 d_pthread_yield (d_pthread_y.U):
1190 This variable conditionally defines the HAS_PTHREAD_YIELD
1191 symbol if the pthread_yield routine is available to yield
1192 the execution of the current thread.
1195 This variable conditionally defines PWAGE, which indicates
1196 that struct passwd contains pw_age.
1198 d_pwchange (i_pwd.U):
1199 This variable conditionally defines PWCHANGE, which indicates
1200 that struct passwd contains pw_change.
1202 d_pwclass (i_pwd.U):
1203 This variable conditionally defines PWCLASS, which indicates
1204 that struct passwd contains pw_class.
1206 d_pwcomment (i_pwd.U):
1207 This variable conditionally defines PWCOMMENT, which indicates
1208 that struct passwd contains pw_comment.
1210 d_pwexpire (i_pwd.U):
1211 This variable conditionally defines PWEXPIRE, which indicates
1212 that struct passwd contains pw_expire.
1214 d_pwgecos (i_pwd.U):
1215 This variable conditionally defines PWGECOS, which indicates
1216 that struct passwd contains pw_gecos.
1218 d_pwpasswd (i_pwd.U):
1219 This variable conditionally defines PWPASSWD, which indicates
1220 that struct passwd contains pw_passwd.
1222 d_pwquota (i_pwd.U):
1223 This variable conditionally defines PWQUOTA, which indicates
1224 that struct passwd contains pw_quota.
1226 d_qgcvt (d_qgcvt.U):
1227 This variable conditionally defines the HAS_QGCVT symbol, which
1228 indicates to the C program that the qgcvt() routine is available.
1230 d_quad (quadtype.U):
1231 This variable, if defined, tells that there's a 64-bit integer type,
1234 d_readdir (d_readdir.U):
1235 This variable conditionally defines HAS_READDIR if readdir() is
1236 available to read directory entries.
1238 d_readlink (d_readlink.U):
1239 This variable conditionally defines the HAS_READLINK symbol, which
1240 indicates to the C program that the readlink() routine is available
1241 to read the value of a symbolic link.
1243 d_readv (d_readv.U):
1244 This variable conditionally defines the HAS_READV symbol, which
1245 indicates to the C program that the readv() routine is available.
1247 d_recvmsg (d_recvmsg.U):
1248 This variable conditionally defines the HAS_RECVMSG symbol, which
1249 indicates to the C program that the recvmsg() routine is available.
1251 d_rename (d_rename.U):
1252 This variable conditionally defines the HAS_RENAME symbol, which
1253 indicates to the C program that the rename() routine is available
1256 d_rewinddir (d_readdir.U):
1257 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1260 d_rmdir (d_rmdir.U):
1261 This variable conditionally defines HAS_RMDIR if rmdir() is
1262 available to remove directories.
1264 d_safebcpy (d_safebcpy.U):
1265 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1266 the bcopy() routine can do overlapping copies.
1268 d_safemcpy (d_safemcpy.U):
1269 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1270 the memcpy() routine can do overlapping copies.
1272 d_sanemcmp (d_sanemcmp.U):
1273 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1274 the memcpy() routine is available and can be used to compare relative
1275 magnitudes of chars with their high bits set.
1277 d_sbrkproto (d_sbrkproto.U):
1278 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1279 which indicates to the C program that the system provides
1280 a prototype for the sbrk() function. Otherwise, it is
1281 up to the program to supply one.
1283 d_sched_yield (d_pthread_y.U):
1284 This variable conditionally defines the HAS_SCHED_YIELD
1285 symbol if the sched_yield routine is available to yield
1286 the execution of the current thread.
1288 d_scm_rights (d_socket.U):
1289 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1290 which indicates that the SCM_RIGHTS is available. #ifdef is
1291 not enough because it may be an enum, glibc has been known to do this.
1293 d_SCNfldbl (longdblfio.U):
1294 This variable conditionally defines the PERL_PRIfldbl symbol, which
1295 indiciates that stdio has a symbol to scan long doubles.
1297 d_seekdir (d_readdir.U):
1298 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1301 d_select (d_select.U):
1302 This variable conditionally defines HAS_SELECT if select() is
1303 available to select active file descriptors. A <sys/time.h>
1304 inclusion may be necessary for the timeout field.
1307 This variable conditionally defines the HAS_SEM symbol, which
1308 indicates that the entire sem*(2) library is present.
1310 d_semctl (d_semctl.U):
1311 This variable conditionally defines the HAS_SEMCTL symbol, which
1312 indicates to the C program that the semctl() routine is available.
1314 d_semctl_semid_ds (d_union_semun.U):
1315 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1316 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1318 d_semctl_semun (d_union_semun.U):
1319 This variable conditionally defines USE_SEMCTL_SEMUN, which
1320 indicates that union semun is to be used for semctl IPC_STAT.
1322 d_semget (d_semget.U):
1323 This variable conditionally defines the HAS_SEMGET symbol, which
1324 indicates to the C program that the semget() routine is available.
1326 d_semop (d_semop.U):
1327 This variable conditionally defines the HAS_SEMOP symbol, which
1328 indicates to the C program that the semop() routine is available.
1330 d_sendmsg (d_sendmsg.U):
1331 This variable conditionally defines the HAS_SENDMSG symbol, which
1332 indicates to the C program that the sendmsg() routine is available.
1334 d_setegid (d_setegid.U):
1335 This variable conditionally defines the HAS_SETEGID symbol, which
1336 indicates to the C program that the setegid() routine is available
1337 to change the effective gid of the current program.
1339 d_seteuid (d_seteuid.U):
1340 This variable conditionally defines the HAS_SETEUID symbol, which
1341 indicates to the C program that the seteuid() routine is available
1342 to change the effective uid of the current program.
1344 d_setgrent (d_setgrent.U):
1345 This variable conditionally defines the HAS_SETGRENT symbol, which
1346 indicates to the C program that the setgrent() routine is available
1347 for initializing sequential access to the group database.
1349 d_setgrps (d_setgrps.U):
1350 This variable conditionally defines the HAS_SETGROUPS symbol, which
1351 indicates to the C program that the setgroups() routine is available
1352 to set the list of process groups.
1354 d_sethent (d_sethent.U):
1355 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1358 d_setitimer (d_setitimer.U):
1359 This variable conditionally defines the HAS_SETITIMER symbol, which
1360 indicates to the C program that the setitimer() routine is available.
1362 d_setlinebuf (d_setlnbuf.U):
1363 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1364 indicates to the C program that the setlinebuf() routine is available
1365 to change stderr or stdout from block-buffered or unbuffered to a
1368 d_setlocale (d_setlocale.U):
1369 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1370 available to handle locale-specific ctype implementations.
1372 d_setnent (d_setnent.U):
1373 This variable conditionally defines HAS_SETNETENT if setnetent() is
1376 d_setpent (d_setpent.U):
1377 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1380 d_setpgid (d_setpgid.U):
1381 This variable conditionally defines the HAS_SETPGID symbol if the
1382 setpgid(pid, gpid) function is available to set process group ID.
1384 d_setpgrp2 (d_setpgrp2.U):
1385 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1386 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1387 is available to set the current process group.
1389 d_setpgrp (d_setpgrp.U):
1390 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1391 available to set the current process group.
1393 d_setprior (d_setprior.U):
1394 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1395 is available to set a process's priority.
1397 d_setproctitle (d_setproctitle.U):
1398 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1399 which indicates to the C program that the setproctitle() routine
1402 d_setpwent (d_setpwent.U):
1403 This variable conditionally defines the HAS_SETPWENT symbol, which
1404 indicates to the C program that the setpwent() routine is available
1405 for initializing sequential access to the passwd database.
1407 d_setregid (d_setregid.U):
1408 This variable conditionally defines HAS_SETREGID if setregid() is
1409 available to change the real and effective gid of the current
1412 d_setresgid (d_setregid.U):
1413 This variable conditionally defines HAS_SETRESGID if setresgid() is
1414 available to change the real, effective and saved gid of the current
1417 d_setresuid (d_setreuid.U):
1418 This variable conditionally defines HAS_SETREUID if setresuid() is
1419 available to change the real, effective and saved uid of the current
1422 d_setreuid (d_setreuid.U):
1423 This variable conditionally defines HAS_SETREUID if setreuid() is
1424 available to change the real and effective uid of the current
1427 d_setrgid (d_setrgid.U):
1428 This variable conditionally defines the HAS_SETRGID symbol, which
1429 indicates to the C program that the setrgid() routine is available
1430 to change the real gid of the current program.
1432 d_setruid (d_setruid.U):
1433 This variable conditionally defines the HAS_SETRUID symbol, which
1434 indicates to the C program that the setruid() routine is available
1435 to change the real uid of the current program.
1437 d_setsent (d_setsent.U):
1438 This variable conditionally defines HAS_SETSERVENT if setservent() is
1441 d_setsid (d_setsid.U):
1442 This variable conditionally defines HAS_SETSID if setsid() is
1443 available to set the process group ID.
1445 d_setvbuf (d_setvbuf.U):
1446 This variable conditionally defines the HAS_SETVBUF symbol, which
1447 indicates to the C program that the setvbuf() routine is available
1448 to change buffering on an open stdio stream.
1451 This variable conditionally defines the USE_SFIO symbol,
1452 and indicates whether sfio is available (and should be used).
1455 This variable conditionally defines the HAS_SHM symbol, which
1456 indicates that the entire shm*(2) library is present.
1458 d_shmat (d_shmat.U):
1459 This variable conditionally defines the HAS_SHMAT symbol, which
1460 indicates to the C program that the shmat() routine is available.
1462 d_shmatprototype (d_shmat.U):
1463 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1464 symbol, which indicates that sys/shm.h has a prototype for
1467 d_shmctl (d_shmctl.U):
1468 This variable conditionally defines the HAS_SHMCTL symbol, which
1469 indicates to the C program that the shmctl() routine is available.
1471 d_shmdt (d_shmdt.U):
1472 This variable conditionally defines the HAS_SHMDT symbol, which
1473 indicates to the C program that the shmdt() routine is available.
1475 d_shmget (d_shmget.U):
1476 This variable conditionally defines the HAS_SHMGET symbol, which
1477 indicates to the C program that the shmget() routine is available.
1479 d_sigaction (d_sigaction.U):
1480 This variable conditionally defines the HAS_SIGACTION symbol, which
1481 indicates that the Vr4 sigaction() routine is available.
1483 d_sigprocmask (d_sigprocmask.U):
1484 This variable conditionally defines HAS_SIGPROCMASK
1485 if sigprocmask() is available to examine or change the signal mask
1486 of the calling process.
1488 d_sigsetjmp (d_sigsetjmp.U):
1489 This variable conditionally defines the HAS_SIGSETJMP symbol,
1490 which indicates that the sigsetjmp() routine is available to
1491 call setjmp() and optionally save the process's signal mask.
1493 d_sockatmark (d_sockatmark.U):
1494 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1495 indicates to the C program that the sockatmark() routine is available.
1497 d_socket (d_socket.U):
1498 This variable conditionally defines HAS_SOCKET, which indicates
1499 that the BSD socket interface is supported.
1501 d_socklen_t (d_socklen_t.U):
1502 This symbol will be defined if the C compiler supports socklen_t.
1504 d_sockpair (d_socket.U):
1505 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1506 indicates that the BSD socketpair() is supported.
1508 d_socks5_init (d_socks5_init.U):
1509 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1510 indicates to the C program that the socks5_init() routine is available.
1512 d_sqrtl (d_sqrtl.U):
1513 This variable conditionally defines the HAS_SQRTL symbol, which
1514 indicates to the C program that the sqrtl() routine is available.
1516 d_statblks (d_statblks.U):
1517 This variable conditionally defines USE_STAT_BLOCKS
1518 if this system has a stat structure declaring
1519 st_blksize and st_blocks.
1521 d_statfs_f_flags (d_statfs_f_flags.U):
1522 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1523 symbol, which indicates to struct statfs from has f_flags member.
1524 This kind of struct statfs is coming from sys/mount.h (BSD),
1525 not from sys/statfs.h (SYSV).
1527 d_statfs_s (d_statfs_s.U):
1528 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1529 which indicates that the struct statfs is supported.
1531 d_statvfs (d_statvfs.U):
1532 This variable conditionally defines the HAS_STATVFS symbol, which
1533 indicates to the C program that the statvfs() routine is available.
1535 d_stdio_cnt_lval (d_stdstdio.U):
1536 This variable conditionally defines STDIO_CNT_LVALUE if the
1537 FILE_cnt macro can be used as an lvalue.
1539 d_stdio_ptr_lval (d_stdstdio.U):
1540 This variable conditionally defines STDIO_PTR_LVALUE if the
1541 FILE_ptr macro can be used as an lvalue.
1543 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1544 This symbol is defined if using the FILE_ptr macro as an lvalue
1545 to increase the pointer by n leaves File_cnt(fp) unchanged.
1547 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1548 This symbol is defined if using the FILE_ptr macro as an lvalue
1549 to increase the pointer by n has the side effect of decreasing the
1550 value of File_cnt(fp) by n.
1552 d_stdio_stream_array (stdio_streams.U):
1553 This variable tells whether there is an array holding
1556 d_stdiobase (d_stdstdio.U):
1557 This variable conditionally defines USE_STDIO_BASE if this system
1558 has a FILE structure declaring a usable _base field (or equivalent)
1561 d_stdstdio (d_stdstdio.U):
1562 This variable conditionally defines USE_STDIO_PTR if this system
1563 has a FILE structure declaring usable _ptr and _cnt fields (or
1564 equivalent) in stdio.h.
1566 d_strchr (d_strchr.U):
1567 This variable conditionally defines HAS_STRCHR if strchr() and
1568 strrchr() are available for string searching.
1570 d_strcoll (d_strcoll.U):
1571 This variable conditionally defines HAS_STRCOLL if strcoll() is
1572 available to compare strings using collating information.
1574 d_strctcpy (d_strctcpy.U):
1575 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1576 indicates to the C program that this C compiler knows how to copy
1579 d_strerrm (d_strerror.U):
1580 This variable holds what Strerrr is defined as to translate an error
1581 code condition into an error message string. It could be 'strerror'
1582 or a more complex macro emulating strrror with sys_errlist[], or the
1583 "unknown" string when both strerror and sys_errlist are missing.
1585 d_strerror (d_strerror.U):
1586 This variable conditionally defines HAS_STRERROR if strerror() is
1587 available to translate error numbers to strings.
1589 d_strftime (d_strftime.U):
1590 This variable conditionally defines the HAS_STRFTIME symbol, which
1591 indicates to the C program that the strftime() routine is available.
1593 d_strtod (d_strtod.U):
1594 This variable conditionally defines the HAS_STRTOD symbol, which
1595 indicates to the C program that the strtod() routine is available
1596 to provide better numeric string conversion than atof().
1598 d_strtol (d_strtol.U):
1599 This variable conditionally defines the HAS_STRTOL symbol, which
1600 indicates to the C program that the strtol() routine is available
1601 to provide better numeric string conversion than atoi() and friends.
1603 d_strtold (d_strtold.U):
1604 This variable conditionally defines the HAS_STRTOLD symbol, which
1605 indicates to the C program that the strtold() routine is available.
1607 d_strtoll (d_strtoll.U):
1608 This variable conditionally defines the HAS_STRTOLL symbol, which
1609 indicates to the C program that the strtoll() routine is available.
1611 d_strtoq (d_strtoq.U):
1612 This variable conditionally defines the HAS_STRTOQ symbol, which
1613 indicates to the C program that the strtoq() routine is available.
1615 d_strtoul (d_strtoul.U):
1616 This variable conditionally defines the HAS_STRTOUL symbol, which
1617 indicates to the C program that the strtoul() routine is available
1618 to provide conversion of strings to unsigned long.
1620 d_strtoull (d_strtoull.U):
1621 This variable conditionally defines the HAS_STRTOULL symbol, which
1622 indicates to the C program that the strtoull() routine is available.
1624 d_strtouq (d_strtouq.U):
1625 This variable conditionally defines the HAS_STRTOUQ symbol, which
1626 indicates to the C program that the strtouq() routine is available.
1628 d_strxfrm (d_strxfrm.U):
1629 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1630 available to transform strings.
1632 d_suidsafe (d_dosuid.U):
1633 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1634 if setuid scripts can be secure. This test looks in /dev/fd/.
1636 d_symlink (d_symlink.U):
1637 This variable conditionally defines the HAS_SYMLINK symbol, which
1638 indicates to the C program that the symlink() routine is available
1639 to create symbolic links.
1641 d_syscall (d_syscall.U):
1642 This variable conditionally defines HAS_SYSCALL if syscall() is
1643 available call arbitrary system calls.
1645 d_sysconf (d_sysconf.U):
1646 This variable conditionally defines the HAS_SYSCONF symbol, which
1647 indicates to the C program that the sysconf() routine is available
1648 to determine system related limits and options.
1650 d_sysernlst (d_strerror.U):
1651 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1652 is available to translate error numbers to the symbolic name.
1654 d_syserrlst (d_strerror.U):
1655 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1656 available to translate error numbers to strings.
1658 d_system (d_system.U):
1659 This variable conditionally defines HAS_SYSTEM if system() is
1660 available to issue a shell command.
1662 d_tcgetpgrp (d_tcgtpgrp.U):
1663 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1664 indicates to the C program that the tcgetpgrp() routine is available.
1665 to get foreground process group ID.
1667 d_tcsetpgrp (d_tcstpgrp.U):
1668 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1669 indicates to the C program that the tcsetpgrp() routine is available
1670 to set foreground process group ID.
1672 d_telldir (d_readdir.U):
1673 This variable conditionally defines HAS_TELLDIR if telldir() is
1676 d_telldirproto (d_telldirproto.U):
1677 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1678 which indicates to the C program that the system provides
1679 a prototype for the telldir() function. Otherwise, it is
1680 up to the program to supply one.
1683 This variable conditionally defines the HAS_TIME symbol, which indicates
1684 that the time() routine exists. The time() routine is normaly
1685 provided on UNIX systems.
1687 d_times (d_times.U):
1688 This variable conditionally defines the HAS_TIMES symbol, which indicates
1689 that the times() routine exists. The times() routine is normaly
1690 provided on UNIX systems. You may have to include <sys/times.h>.
1692 d_truncate (d_truncate.U):
1693 This variable conditionally defines HAS_TRUNCATE if truncate() is
1694 available to truncate files.
1696 d_tzname (d_tzname.U):
1697 This variable conditionally defines HAS_TZNAME if tzname[] is
1698 available to access timezone names.
1700 d_u32align (d_u32align.U):
1701 This variable tells whether you must access character data
1702 through U32-aligned pointers.
1704 d_ualarm (d_ualarm.U):
1705 This variable conditionally defines the HAS_UALARM symbol, which
1706 indicates to the C program that the ualarm() routine is available.
1708 d_umask (d_umask.U):
1709 This variable conditionally defines the HAS_UMASK symbol, which
1710 indicates to the C program that the umask() routine is available.
1711 to set and get the value of the file creation mask.
1713 d_uname (d_gethname.U):
1714 This variable conditionally defines the HAS_UNAME symbol, which
1715 indicates to the C program that the uname() routine may be
1716 used to derive the host name.
1718 d_union_semun (d_union_semun.U):
1719 This variable conditionally defines HAS_UNION_SEMUN if the
1720 union semun is defined by including <sys/sem.h>.
1722 d_usleep (d_usleep.U):
1723 This variable conditionally defines HAS_USLEEP if usleep() is
1724 available to do high granularity sleeps.
1726 d_ustat (d_ustat.U):
1727 This variable conditionally defines HAS_USTAT if ustat() is
1728 available to query file system statistics by dev_t.
1730 d_vendorarch (vendorarch.U):
1731 This variable conditionally defined PERL_VENDORARCH.
1733 d_vendorbin (vendorbin.U):
1734 This variable conditionally defines PERL_VENDORBIN.
1736 d_vendorlib (vendorlib.U):
1737 This variable conditionally defines PERL_VENDORLIB.
1739 d_vfork (d_vfork.U):
1740 This variable conditionally defines the HAS_VFORK symbol, which
1741 indicates the vfork() routine is available.
1743 d_void_closedir (d_closedir.U):
1744 This variable conditionally defines VOID_CLOSEDIR if closedir()
1745 does not return a value.
1747 d_voidsig (d_voidsig.U):
1748 This variable conditionally defines VOIDSIG if this system
1749 declares "void (*signal(...))()" in signal.h. The old way was to
1750 declare it as "int (*signal(...))()".
1752 d_voidtty (i_sysioctl.U):
1753 This variable conditionally defines USE_IOCNOTTY to indicate that the
1754 ioctl() call with TIOCNOTTY should be used to void tty association.
1755 Otherwise (on USG probably), it is enough to close the standard file
1756 decriptors and do a setpgrp().
1758 d_volatile (d_volatile.U):
1759 This variable conditionally defines the HASVOLATILE symbol, which
1760 indicates to the C program that this C compiler knows about the
1761 volatile declaration.
1763 d_vprintf (d_vprintf.U):
1764 This variable conditionally defines the HAS_VPRINTF symbol, which
1765 indicates to the C program that the vprintf() routine is available
1766 to printf with a pointer to an argument list.
1768 d_wait4 (d_wait4.U):
1769 This variable conditionally defines the HAS_WAIT4 symbol, which
1770 indicates the wait4() routine is available.
1772 d_waitpid (d_waitpid.U):
1773 This variable conditionally defines HAS_WAITPID if waitpid() is
1774 available to wait for child process.
1776 d_wcstombs (d_wcstombs.U):
1777 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1778 indicates to the C program that the wcstombs() routine is available
1779 to convert wide character strings to multibyte strings.
1781 d_wctomb (d_wctomb.U):
1782 This variable conditionally defines the HAS_WCTOMB symbol, which
1783 indicates to the C program that the wctomb() routine is available
1784 to convert a wide character to a multibyte.
1786 d_writev (d_writev.U):
1787 This variable conditionally defines the HAS_WRITEV symbol, which
1788 indicates to the C program that the writev() routine is available.
1791 This variable conditionally defines the symbol XENIX, which alerts
1792 the C program that it runs under Xenix.
1795 This variable is used internally by Configure to determine the
1796 full pathname (if any) of the date program. After Configure runs,
1797 the value is reset to a plain "date" and is not useful.
1799 db_hashtype (i_db.U):
1800 This variable contains the type of the hash structure element
1801 in the <db.h> header file. In older versions of DB, it was
1802 int, while in newer ones it is u_int32_t.
1804 db_prefixtype (i_db.U):
1805 This variable contains the type of the prefix structure element
1806 in the <db.h> header file. In older versions of DB, it was
1807 int, while in newer ones it is size_t.
1809 defvoidused (voidflags.U):
1810 This variable contains the default value of the VOIDUSED symbol (15).
1812 direntrytype (i_dirent.U):
1813 This symbol is set to 'struct direct' or 'struct dirent' depending on
1814 whether dirent is available or not. You should use this pseudo type to
1815 portably declare your directory entries.
1818 This variable contains the extension that is to be used for the
1819 dynamically loaded modules that perl generaties.
1822 This variable contains the name of the dynamic loading file that
1823 will be used with the package.
1825 doublesize (doublesize.U):
1826 This variable contains the value of the DOUBLESIZE symbol, which
1827 indicates to the C program how many bytes there are in a double.
1829 drand01 (randfunc.U):
1830 Indicates the macro to be used to generate normalized
1831 random numbers. Uses randfunc, often divided by
1832 (double) (((unsigned long) 1 << randbits)) in order to
1833 normalize the result.
1834 In C programs, the macro 'Drand01' is mapped to drand01.
1836 dynamic_ext (Extensions.U):
1837 This variable holds a list of XS extension files we want to
1838 link dynamically into the package. It is used by Makefile.
1840 eagain (nblock_io.U):
1841 This variable bears the symbolic errno code set by read() when no
1842 data is present on the file and non-blocking I/O was enabled (otherwise,
1843 read() blocks naturally).
1846 This variable conditionally defines EBCDIC if this
1847 system uses EBCDIC encoding. Among other things, this
1848 means that the character ranges are not contiguous.
1852 This variable is used internally by Configure to determine the
1853 full pathname (if any) of the echo program. After Configure runs,
1854 the value is reset to a plain "echo" and is not useful.
1857 This variable is used internally by Configure to determine the
1858 full pathname (if any) of the egrep program. After Configure runs,
1859 the value is reset to a plain "egrep" and is not useful.
1862 This variable is defined but not used by Configure.
1863 The value is a plain '' and is not useful.
1866 When running under Eunice this variable contains a command which will
1867 convert a shell script to the proper form of text file for it to be
1868 executable by the shell. On other systems it is a no-op.
1871 This is an old synonym for _exe.
1874 This variable is used internally by Configure to determine the
1875 full pathname (if any) of the expr program. After Configure runs,
1876 the value is reset to a plain "expr" and is not useful.
1878 extensions (Extensions.U):
1879 This variable holds a list of all extension files (both XS and
1880 non-xs linked into the package. It is propagated to Config.pm
1881 and is typically used to test whether a particular extesion
1884 fflushall (fflushall.U):
1885 This symbol, if defined, tells that to flush
1886 all pending stdio output one must loop through all
1887 the stdio file handles stored in an array and fflush them.
1888 Note that if fflushNULL is defined, fflushall will not
1889 even be probed for and will be left undefined.
1891 fflushNULL (fflushall.U):
1892 This symbol, if defined, tells that fflush(NULL) does flush
1893 all pending stdio output.
1896 This variable is defined but not used by Configure.
1897 The value is a plain '' and is not useful.
1899 firstmakefile (Unix.U):
1900 This variable defines the first file searched by make. On unix,
1901 it is makefile (then Makefile). On case-insensitive systems,
1902 it might be something else. This is only used to deal with
1903 convoluted make depend tricks.
1906 This variable is defined but not used by Configure.
1907 The value is a plain '' and is not useful.
1909 fpossize (fpossize.U):
1910 This variable contains the size of a fpostype in bytes.
1912 fpostype (fpostype.U):
1913 This variable defines Fpos_t to be something like fpos_t, long,
1914 uint, or whatever type is used to declare file positions in libc.
1916 freetype (mallocsrc.U):
1917 This variable contains the return type of free(). It is usually
1918 void, but occasionally int.
1921 This variable contains the full pathname to 'ar', whether or
1922 not the user has specified 'portability'. This is only used
1926 This variable contains the full pathname to 'csh', whether or
1927 not the user has specified 'portability'. This is only used
1928 in the compiled C program, and we assume that all systems which
1929 can share this executable will have the same full pathname to
1932 full_sed (Loc_sed.U):
1933 This variable contains the full pathname to 'sed', whether or
1934 not the user has specified 'portability'. This is only used
1935 in the compiled C program, and we assume that all systems which
1936 can share this executable will have the same full pathname to
1939 gccosandvers (gccvers.U):
1940 If GNU cc (gcc) is used, this variable the operating system and
1941 version used to compile the gcc. It is set to '' if not gcc,
1942 or if nothing useful can be parsed as the os version.
1944 gccversion (gccvers.U):
1945 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1946 indicate whether the compiler is version 1 or 2. This is used in
1947 setting some of the default cflags. It is set to '' if not gcc.
1950 This variable contains the format string used for printing a Gid_t.
1952 gidsign (gidsign.U):
1953 This variable contains the signedness of a gidtype.
1954 1 for unsigned, -1 for signed.
1956 gidsize (gidsize.U):
1957 This variable contains the size of a gidtype in bytes.
1959 gidtype (gidtype.U):
1960 This variable defines Gid_t to be something like gid_t, int,
1961 ushort, or whatever type is used to declare the return type
1962 of getgid(). Typically, it is the type of group ids in the kernel.
1965 This variable holds the general path (space-separated) used to
1966 find libraries. It may contain directories that do not exist on
1967 this platform, libpth is the cleaned-up version.
1970 This variable is used internally by Configure to determine the
1971 full pathname (if any) of the grep program. After Configure runs,
1972 the value is reset to a plain "grep" and is not useful.
1975 This variable contains a command that produces the text of the
1976 /etc/group file. This is normally "cat /etc/group", but can be
1977 "ypcat group" when NIS is used.
1978 On some systems, such as os390, there may be no equivalent
1979 command, in which case this variable is unset.
1981 groupstype (groupstype.U):
1982 This variable defines Groups_t to be something like gid_t, int,
1983 ushort, or whatever type is used for the second argument to
1984 getgroups() and setgroups(). Usually, this is the same as
1985 gidtype (gid_t), but sometimes it isn't.
1988 This variable is used internally by Configure to determine the
1989 full pathname (if any) of the gzip program. After Configure runs,
1990 the value is reset to a plain "gzip" and is not useful.
1992 h_fcntl (h_fcntl.U):
1993 This is variable gets set in various places to tell i_fcntl that
1994 <fcntl.h> should be included.
1996 h_sysfile (h_sysfile.U):
1997 This is variable gets set in various places to tell i_sys_file that
1998 <sys/file.h> should be included.
2001 Gives the type of hints used for previous answers. May be one of
2002 "default", "recommended" or "previous".
2005 This variable contains a command that produces the text of the
2006 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2007 "ypcat hosts" when NIS is used.
2008 On some systems, such as os390, there may be no equivalent
2009 command, in which case this variable is unset.
2012 This variable is the size of an I16 in bytes.
2015 This variable contains the C type used for Perl's I16.
2018 This variable is the size of an I32 in bytes.
2021 This variable contains the C type used for Perl's I32.
2024 This variable is the size of an I64 in bytes.
2027 This variable contains the C type used for Perl's I64.
2030 This variable is the size of an I8 in bytes.
2033 This variable contains the C type used for Perl's I8.
2035 i_arpainet (i_arpainet.U):
2036 This variable conditionally defines the I_ARPA_INET symbol,
2037 and indicates whether a C program should include <arpa/inet.h>.
2039 i_bsdioctl (i_sysioctl.U):
2040 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2041 indicates to the C program that <sys/bsdioctl.h> exists and should
2045 This variable conditionally defines the I_DB symbol, and indicates
2046 whether a C program may include Berkeley's DB include file <db.h>.
2049 This variable conditionally defines the I_DBM symbol, which
2050 indicates to the C program that <dbm.h> exists and should
2053 i_dirent (i_dirent.U):
2054 This variable conditionally defines I_DIRENT, which indicates
2055 to the C program that it should include <dirent.h>.
2058 This variable conditionally defines the I_DLD symbol, which
2059 indicates to the C program that <dld.h> (GNU dynamic loading)
2060 exists and should be included.
2062 i_dlfcn (i_dlfcn.U):
2063 This variable conditionally defines the I_DLFCN symbol, which
2064 indicates to the C program that <dlfcn.h> exists and should
2067 i_fcntl (i_fcntl.U):
2068 This variable controls the value of I_FCNTL (which tells
2069 the C program to include <fcntl.h>).
2071 i_float (i_float.U):
2072 This variable conditionally defines the I_FLOAT symbol, and indicates
2073 whether a C program may include <float.h> to get symbols like DBL_MAX
2074 or DBL_MIN, i.e. machine dependent floating point values.
2077 This variable conditionally defines the I_GDBM symbol, which
2078 indicates to the C program that <gdbm.h> exists and should
2082 This variable conditionally defines the I_GRP symbol, and indicates
2083 whether a C program should include <grp.h>.
2085 i_iconv (i_iconv.U):
2086 This variable conditionally defines the I_ICONV symbol, and indicates
2087 whether a C program should include <iconv.h>.
2089 i_ieeefp (i_ieeefp.U):
2090 This variable conditionally defines the I_IEEEFP symbol, and indicates
2091 whether a C program should include <ieeefp.h>.
2093 i_inttypes (i_inttypes.U):
2094 This variable conditionally defines the I_INTTYPES symbol,
2095 and indicates whether a C program should include <inttypes.h>.
2097 i_libutil (i_libutil.U):
2098 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2099 whether a C program should include <libutil.h>.
2101 i_limits (i_limits.U):
2102 This variable conditionally defines the I_LIMITS symbol, and indicates
2103 whether a C program may include <limits.h> to get symbols like WORD_BIT
2106 i_locale (i_locale.U):
2107 This variable conditionally defines the I_LOCALE symbol,
2108 and indicates whether a C program should include <locale.h>.
2110 i_machcthr (i_machcthr.U):
2111 This variable conditionally defines the I_MACH_CTHREADS symbol,
2112 and indicates whether a C program should include <mach/cthreads.h>.
2114 i_malloc (i_malloc.U):
2115 This variable conditionally defines the I_MALLOC symbol, and indicates
2116 whether a C program should include <malloc.h>.
2119 This variable conditionally defines the I_MATH symbol, and indicates
2120 whether a C program may include <math.h>.
2122 i_memory (i_memory.U):
2123 This variable conditionally defines the I_MEMORY symbol, and indicates
2124 whether a C program should include <memory.h>.
2126 i_mntent (i_mntent.U):
2127 This variable conditionally defines the I_MNTENT symbol, and indicates
2128 whether a C program should include <mntent.h>.
2131 This variable conditionally defines the I_NDBM symbol, which
2132 indicates to the C program that <ndbm.h> exists and should
2135 i_netdb (i_netdb.U):
2136 This variable conditionally defines the I_NETDB symbol, and indicates
2137 whether a C program should include <netdb.h>.
2139 i_neterrno (i_neterrno.U):
2140 This variable conditionally defines the I_NET_ERRNO symbol, which
2141 indicates to the C program that <net/errno.h> exists and should
2144 i_netinettcp (i_netinettcp.U):
2145 This variable conditionally defines the I_NETINET_TCP symbol,
2146 and indicates whether a C program should include <netinet/tcp.h>.
2149 This variable conditionally defines I_NETINET_IN, which indicates
2150 to the C program that it should include <netinet/in.h>. Otherwise,
2151 you may try <sys/in.h>.
2154 This variable conditionally defines the I_POLL symbol, and indicates
2155 whether a C program should include <poll.h>.
2158 This variable conditionally defines the I_PROT symbol, and indicates
2159 whether a C program should include <prot.h>.
2161 i_pthread (i_pthread.U):
2162 This variable conditionally defines the I_PTHREAD symbol,
2163 and indicates whether a C program should include <pthread.h>.
2166 This variable conditionally defines I_PWD, which indicates
2167 to the C program that it should include <pwd.h>.
2169 i_rpcsvcdbm (i_dbm.U):
2170 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2171 indicates to the C program that <rpcsvc/dbm.h> exists and should
2172 be included. Some System V systems might need this instead of <dbm.h>.
2175 This variable conditionally defines the I_SFIO symbol,
2176 and indicates whether a C program should include <sfio.h>.
2178 i_sgtty (i_termio.U):
2179 This variable conditionally defines the I_SGTTY symbol, which
2180 indicates to the C program that it should include <sgtty.h> rather
2183 i_shadow (i_shadow.U):
2184 This variable conditionally defines the I_SHADOW symbol, and indicates
2185 whether a C program should include <shadow.h>.
2187 i_socks (i_socks.U):
2188 This variable conditionally defines the I_SOCKS symbol, and indicates
2189 whether a C program should include <socks.h>.
2191 i_stdarg (i_varhdr.U):
2192 This variable conditionally defines the I_STDARG symbol, which
2193 indicates to the C program that <stdarg.h> exists and should
2196 i_stddef (i_stddef.U):
2197 This variable conditionally defines the I_STDDEF symbol, which
2198 indicates to the C program that <stddef.h> exists and should
2201 i_stdlib (i_stdlib.U):
2202 This variable conditionally defines the I_STDLIB symbol, which
2203 indicates to the C program that <stdlib.h> exists and should
2206 i_string (i_string.U):
2207 This variable conditionally defines the I_STRING symbol, which
2208 indicates that <string.h> should be included rather than <strings.h>.
2210 i_sunmath (i_sunmath.U):
2211 This variable conditionally defines the I_SUNMATH symbol, and indicates
2212 whether a C program should include <sunmath.h>.
2214 i_sysaccess (i_sysaccess.U):
2215 This variable conditionally defines the I_SYS_ACCESS symbol,
2216 and indicates whether a C program should include <sys/access.h>.
2218 i_sysdir (i_sysdir.U):
2219 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2220 whether a C program should include <sys/dir.h>.
2222 i_sysfile (i_sysfile.U):
2223 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2224 whether a C program should include <sys/file.h> to get R_OK and friends.
2226 i_sysfilio (i_sysioctl.U):
2227 This variable conditionally defines the I_SYS_FILIO symbol, which
2228 indicates to the C program that <sys/filio.h> exists and should
2229 be included in preference to <sys/ioctl.h>.
2232 This variable conditionally defines I_SYS_IN, which indicates
2233 to the C program that it should include <sys/in.h> instead of
2236 i_sysioctl (i_sysioctl.U):
2237 This variable conditionally defines the I_SYS_IOCTL symbol, which
2238 indicates to the C program that <sys/ioctl.h> exists and should
2241 i_syslog (i_syslog.U):
2242 This variable conditionally defines the I_SYSLOG symbol,
2243 and indicates whether a C program should include <syslog.h>.
2245 i_sysmman (i_sysmman.U):
2246 This variable conditionally defines the I_SYS_MMAN symbol, and
2247 indicates whether a C program should include <sys/mman.h>.
2249 i_sysmode (i_sysmode.U):
2250 This variable conditionally defines the I_SYSMODE symbol,
2251 and indicates whether a C program should include <sys/mode.h>.
2253 i_sysmount (i_sysmount.U):
2254 This variable conditionally defines the I_SYSMOUNT symbol,
2255 and indicates whether a C program should include <sys/mount.h>.
2257 i_sysndir (i_sysndir.U):
2258 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2259 whether a C program should include <sys/ndir.h>.
2261 i_sysparam (i_sysparam.U):
2262 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2263 whether a C program should include <sys/param.h>.
2265 i_sysresrc (i_sysresrc.U):
2266 This variable conditionally defines the I_SYS_RESOURCE symbol,
2267 and indicates whether a C program should include <sys/resource.h>.
2269 i_syssecrt (i_syssecrt.U):
2270 This variable conditionally defines the I_SYS_SECURITY symbol,
2271 and indicates whether a C program should include <sys/security.h>.
2273 i_sysselct (i_sysselct.U):
2274 This variable conditionally defines I_SYS_SELECT, which indicates
2275 to the C program that it should include <sys/select.h> in order to
2276 get the definition of struct timeval.
2278 i_syssockio (i_sysioctl.U):
2279 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2280 C program that socket ioctl codes may be found in <sys/sockio.h>
2281 instead of <sys/ioctl.h>.
2283 i_sysstat (i_sysstat.U):
2284 This variable conditionally defines the I_SYS_STAT symbol,
2285 and indicates whether a C program should include <sys/stat.h>.
2287 i_sysstatfs (i_sysstatfs.U):
2288 This variable conditionally defines the I_SYSSTATFS symbol,
2289 and indicates whether a C program should include <sys/statfs.h>.
2291 i_sysstatvfs (i_sysstatvfs.U):
2292 This variable conditionally defines the I_SYSSTATVFS symbol,
2293 and indicates whether a C program should include <sys/statvfs.h>.
2295 i_systime (i_time.U):
2296 This variable conditionally defines I_SYS_TIME, which indicates
2297 to the C program that it should include <sys/time.h>.
2299 i_systimek (i_time.U):
2300 This variable conditionally defines I_SYS_TIME_KERNEL, which
2301 indicates to the C program that it should include <sys/time.h>
2302 with KERNEL defined.
2304 i_systimes (i_systimes.U):
2305 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2306 whether a C program should include <sys/times.h>.
2308 i_systypes (i_systypes.U):
2309 This variable conditionally defines the I_SYS_TYPES symbol,
2310 and indicates whether a C program should include <sys/types.h>.
2312 i_sysuio (i_sysuio.U):
2313 This variable conditionally defines the I_SYSUIO symbol, and indicates
2314 whether a C program should include <sys/uio.h>.
2316 i_sysun (i_sysun.U):
2317 This variable conditionally defines I_SYS_UN, which indicates
2318 to the C program that it should include <sys/un.h> to get UNIX
2319 domain socket definitions.
2321 i_sysutsname (i_sysutsname.U):
2322 This variable conditionally defines the I_SYSUTSNAME symbol,
2323 and indicates whether a C program should include <sys/utsname.h>.
2325 i_sysvfs (i_sysvfs.U):
2326 This variable conditionally defines the I_SYSVFS symbol,
2327 and indicates whether a C program should include <sys/vfs.h>.
2329 i_syswait (i_syswait.U):
2330 This variable conditionally defines I_SYS_WAIT, which indicates
2331 to the C program that it should include <sys/wait.h>.
2333 i_termio (i_termio.U):
2334 This variable conditionally defines the I_TERMIO symbol, which
2335 indicates to the C program that it should include <termio.h> rather
2338 i_termios (i_termio.U):
2339 This variable conditionally defines the I_TERMIOS symbol, which
2340 indicates to the C program that the POSIX <termios.h> file is
2344 This variable conditionally defines I_TIME, which indicates
2345 to the C program that it should include <time.h>.
2347 i_unistd (i_unistd.U):
2348 This variable conditionally defines the I_UNISTD symbol, and indicates
2349 whether a C program should include <unistd.h>.
2351 i_ustat (i_ustat.U):
2352 This variable conditionally defines the I_USTAT symbol, and indicates
2353 whether a C program should include <ustat.h>.
2355 i_utime (i_utime.U):
2356 This variable conditionally defines the I_UTIME symbol, and indicates
2357 whether a C program should include <utime.h>.
2359 i_values (i_values.U):
2360 This variable conditionally defines the I_VALUES symbol, and indicates
2361 whether a C program may include <values.h> to get symbols like MAXLONG
2364 i_varargs (i_varhdr.U):
2365 This variable conditionally defines I_VARARGS, which indicates
2366 to the C program that it should include <varargs.h>.
2368 i_varhdr (i_varhdr.U):
2369 Contains the name of the header to be included to get va_dcl definition.
2370 Typically one of varargs.h or stdarg.h.
2372 i_vfork (i_vfork.U):
2373 This variable conditionally defines the I_VFORK symbol, and indicates
2374 whether a C program should include vfork.h.
2376 ignore_versioned_solibs (libs.U):
2377 This variable should be non-empty if non-versioned shared
2378 libraries (libfoo.so.x.y) are to be ignored (because they
2379 cannot be linked against).
2381 inc_version_list (inc_version_list.U):
2382 This variable specifies the list of subdirectories in over
2383 which perl.c:incpush() and lib/lib.pm will automatically
2384 search when adding directories to @INC. The elements in
2385 the list are separated by spaces. This is only useful
2386 if you have a perl library directory tree structured like the
2387 default one. See INSTALL for how this works. The versioned
2388 site_perl directory was introduced in 5.005, so that is the
2389 lowest possible value.
2391 inc_version_list_init (inc_version_list.U):
2392 This variable holds the same list as inc_version_list, but
2393 each item is enclosed in double quotes and separated by commas,
2394 suitable for use in the PERL_INC_VERSION_LIST initialization.
2397 This variable must preceed the normal include path to get hte
2398 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2399 Value can be "" or "/bsd43" on mips.
2402 This variable is defined but not used by Configure.
2403 The value is a plain '' and is not useful.
2405 installarchlib (archlib.U):
2406 This variable is really the same as archlibexp but may differ on
2407 those systems using AFS. For extra portability, only this variable
2408 should be used in makefiles.
2411 This variable is the same as binexp unless AFS is running in which case
2412 the user is explicitely prompted for it. This variable should always
2413 be used in your makefiles for maximum portability.
2415 installman1dir (man1dir.U):
2416 This variable is really the same as man1direxp, unless you are using
2417 AFS in which case it points to the read/write location whereas
2418 man1direxp only points to the read-only access location. For extra
2419 portability, you should only use this variable within your makefiles.
2421 installman3dir (man3dir.U):
2422 This variable is really the same as man3direxp, unless you are using
2423 AFS in which case it points to the read/write location whereas
2424 man3direxp only points to the read-only access location. For extra
2425 portability, you should only use this variable within your makefiles.
2427 installprefix (installprefix.U):
2428 This variable holds the name of the directory below which
2429 "make install" will install the package. For most users, this
2430 is the same as prefix. However, it is useful for
2431 installing the software into a different (usually temporary)
2432 location after which it can be bundled up and moved somehow
2433 to the final location specified by prefix.
2435 installprefixexp (installprefix.U):
2436 This variable holds the full absolute path of installprefix
2437 with all ~-expansion done.
2439 installprivlib (privlib.U):
2440 This variable is really the same as privlibexp but may differ on
2441 those systems using AFS. For extra portability, only this variable
2442 should be used in makefiles.
2444 installscript (scriptdir.U):
2445 This variable is usually the same as scriptdirexp, unless you are on
2446 a system running AFS, in which case they may differ slightly. You
2447 should always use this variable within your makefiles for portability.
2449 installsitearch (sitearch.U):
2450 This variable is really the same as sitearchexp but may differ on
2451 those systems using AFS. For extra portability, only this variable
2452 should be used in makefiles.
2454 installsitebin (sitebin.U):
2455 This variable is usually the same as sitebinexp, unless you are on
2456 a system running AFS, in which case they may differ slightly. You
2457 should always use this variable within your makefiles for portability.
2459 installsitelib (sitelib.U):
2460 This variable is really the same as sitelibexp but may differ on
2461 those systems using AFS. For extra portability, only this variable
2462 should be used in makefiles.
2464 installstyle (installstyle.U):
2465 This variable describes the "style" of the perl installation.
2466 This is intended to be useful for tools that need to
2467 manipulate entire perl distributions. Perl itself doesn't use
2468 this to find its libraries -- the library directories are
2469 stored directly in Config.pm. Currently, there are only two
2470 styles: "lib" and "lib/perl5". The default library locations
2471 (e.g. privlib, sitelib) are either $prefix/lib or
2472 $prefix/lib/perl5. The former is useful if $prefix is a
2473 directory dedicated to perl (e.g. /opt/perl), while the latter
2474 is useful if $prefix is shared by many packages, e.g. if
2476 This may later be extended to include other information, so
2477 be careful with pattern-matching on the results.
2478 For compatibility with perl5.005 and earlier, the default
2479 setting is based on whether or not $prefix contains the string
2482 installusrbinperl (instubperl.U):
2483 This variable tells whether Perl should be installed also as
2484 /usr/bin/perl in addition to
2487 installvendorarch (vendorarch.U):
2488 This variable is really the same as vendorarchexp but may differ on
2489 those systems using AFS. For extra portability, only this variable
2490 should be used in makefiles.
2492 installvendorbin (vendorbin.U):
2493 This variable is really the same as vendorbinexp but may differ on
2494 those systems using AFS. For extra portability, only this variable
2495 should be used in makefiles.
2497 installvendorlib (vendorlib.U):
2498 This variable is really the same as vendorlibexp but may differ on
2499 those systems using AFS. For extra portability, only this variable
2500 should be used in makefiles.
2502 intsize (intsize.U):
2503 This variable contains the value of the INTSIZE symbol, which
2504 indicates to the C program how many bytes there are in an int.
2506 issymlink (issymlink.U):
2507 This variable holds the test command to test for a symbolic link
2508 (if they are supported). Typical values include 'test -h' and
2511 ivdformat (perlxvf.U):
2512 This variable contains the format string used for printing
2513 a Perl IV as a signed decimal integer.
2516 This variable is the size of an IV in bytes.
2519 This variable contains the C type used for Perl's IV.
2521 known_extensions (Extensions.U):
2522 This variable holds a list of all XS extensions included in
2526 This variable is defined but not used by Configure.
2527 The value is a plain '' and is not useful.
2530 This variable indicates the program to be used to link
2531 libraries for dynamic loading. On some systems, it is 'ld'.
2532 On ELF systems, it should be $cc. Mostly, we'll try to respect
2533 the hint file setting.
2535 lddlflags (dlsrc.U):
2536 This variable contains any special flags that might need to be
2537 passed to $ld to create a shared library suitable for dynamic
2538 loading. It is up to the makefile to use it. For hpux, it
2539 should be '-b'. For sunos 4.1, it is empty.
2541 ldflags (ccflags.U):
2542 This variable contains any additional C loader flags desired by
2543 the user. It is up to the Makefile to use this.
2545 ldflags_uselargefiles (uselfs.U):
2546 This variable contains the loader flags needed by large file builds
2547 and added to ldflags by hints files.
2549 ldlibpthname (libperl.U):
2550 This variable holds the name of the shared library
2551 search path, often LD_LIBRARY_PATH. To get an empty
2552 string, the hints file must set this to 'none'.
2555 This variable is used internally by Configure to determine the
2556 full pathname (if any) of the less program. After Configure runs,
2557 the value is reset to a plain "less" and is not useful.
2560 This is an old synonym for _a.
2563 This variable contains the location of the C library.
2565 libperl (libperl.U):
2566 The perl executable is obtained by linking perlmain.c with
2567 libperl, any static extensions (usually just DynaLoader),
2568 and any other libraries needed on this system. libperl
2569 is usually libperl.a, but can also be libperl.so.xxx if
2570 the user wishes to build a perl executable with a shared
2574 This variable holds the general path (space-separated) used to find
2575 libraries. It is intended to be used by other units.
2578 This variable holds the additional libraries we want to use.
2579 It is up to the Makefile to deal with it.
2582 This variable holds the directory names aka dirnames of the libraries
2583 we found and accepted, duplicates are removed.
2586 This variable holds the filenames aka basenames of the libraries
2587 we found and accepted.
2590 This variable holds the full pathnames of the libraries
2591 we found and accepted.
2594 This variable holds the directory names probed for libraries.
2596 libswanted (Myinit.U):
2597 This variable holds a list of all the libraries we want to
2598 search. The order is chosen to pick up the c library
2599 ahead of ucb or bsd libraries for SVR4.
2601 libswanted_uselargefiles (uselfs.U):
2602 This variable contains the libraries needed by large file builds
2603 and added to ldflags by hints files. It is a space separated list
2604 of the library names without the "lib" prefix or any suffix, just
2608 This variable is defined but not used by Configure.
2609 The value is a plain '' and is not useful.
2612 This variable is defined but not used by Configure.
2613 The value is a plain '' and is not useful.
2615 lkflags (ccflags.U):
2616 This variable contains any additional C partial linker flags desired by
2617 the user. It is up to the Makefile to use this.
2620 This variable is used internally by Configure to determine the
2621 full pathname (if any) of the ln program. After Configure runs,
2622 the value is reset to a plain "ln" and is not useful.
2625 This variable holds the name of the command to make
2626 symbolic links (if they are supported). It can be used
2627 in the Makefile. It is either 'ln -s' or 'ln'
2629 locincpth (ccflags.U):
2630 This variable contains a list of additional directories to be
2631 searched by the compiler. The appropriate '-I' directives will
2632 be added to ccflags. This is intended to simplify setting
2633 local directories from the Configure command line.
2634 It's not much, but it parallels the loclibpth stuff in libpth.U.
2636 loclibpth (libpth.U):
2637 This variable holds the paths (space-separated) used to find local
2638 libraries. It is prepended to libpth, and is intended to be easily
2639 set from the command line.
2641 longdblsize (d_longdbl.U):
2642 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2643 indicates to the C program how many bytes there are in a long double,
2644 if this system supports long doubles.
2646 longlongsize (d_longlong.U):
2647 This variable contains the value of the LONGLONGSIZE symbol, which
2648 indicates to the C program how many bytes there are in a long long,
2649 if this system supports long long.
2651 longsize (intsize.U):
2652 This variable contains the value of the LONGSIZE symbol, which
2653 indicates to the C program how many bytes there are in a long.
2656 This variable is defined but not used by Configure.
2657 The value is a plain '' and is not useful.
2660 This variable is defined but not used by Configure.
2661 The value is a plain '' and is not useful.
2664 This variable is used internally by Configure to determine the
2665 full pathname (if any) of the ls program. After Configure runs,
2666 the value is reset to a plain "ls" and is not useful.
2668 lseeksize (lseektype.U):
2669 This variable defines lseektype to be something like off_t, long,
2670 or whatever type is used to declare lseek offset's type in the
2671 kernel (which also appears to be lseek's return type).
2673 lseektype (lseektype.U):
2674 This variable defines lseektype to be something like off_t, long,
2675 or whatever type is used to declare lseek offset's type in the
2676 kernel (which also appears to be lseek's return type).
2679 This variable is defined but not used by Configure.
2680 The value is a plain '' and is not useful.
2683 This variable is defined but not used by Configure.
2684 The value is a plain '' and is not useful.
2687 This variable is used internally by Configure to determine the
2688 full pathname (if any) of the make program. After Configure runs,
2689 the value is reset to a plain "make" and is not useful.
2691 make_set_make (make.U):
2692 Some versions of 'make' set the variable MAKE. Others do not.
2693 This variable contains the string to be included in Makefile.SH
2694 so that MAKE is set if needed, and not if not needed.
2695 Possible values are:
2696 make_set_make='#' # If your make program handles this for you,
2697 make_set_make="MAKE=$make" # if it doesn't.
2698 I used a comment character so that we can distinguish a
2699 'set' value (from a previous config.sh or Configure '-D' option)
2700 from an uncomputed value.
2702 mallocobj (mallocsrc.U):
2703 This variable contains the name of the malloc.o that this package
2704 generates, if that malloc.o is preferred over the system malloc.
2705 Otherwise the value is null. This variable is intended for generating
2706 Makefiles. See mallocsrc.
2708 mallocsrc (mallocsrc.U):
2709 This variable contains the name of the malloc.c that comes with
2710 the package, if that malloc.c is preferred over the system malloc.
2711 Otherwise the value is null. This variable is intended for generating
2714 malloctype (mallocsrc.U):
2715 This variable contains the kind of ptr returned by malloc and realloc.
2717 man1dir (man1dir.U):
2718 This variable contains the name of the directory in which manual
2719 source pages are to be put. It is the responsibility of the
2720 Makefile.SH to get the value of this into the proper command.
2721 You must be prepared to do the ~name expansion yourself.
2723 man1direxp (man1dir.U):
2724 This variable is the same as the man1dir variable, but is filename
2725 expanded at configuration time, for convenient use in makefiles.
2727 man1ext (man1dir.U):
2728 This variable contains the extension that the manual page should
2729 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2732 man3dir (man3dir.U):
2733 This variable contains the name of the directory in which manual
2734 source pages are to be put. It is the responsibility of the
2735 Makefile.SH to get the value of this into the proper command.
2736 You must be prepared to do the ~name expansion yourself.
2738 man3direxp (man3dir.U):
2739 This variable is the same as the man3dir variable, but is filename
2740 expanded at configuration time, for convenient use in makefiles.
2742 man3ext (man3dir.U):
2743 This variable contains the extension that the manual page should
2744 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2748 This variable is used internally by Configure to determine the
2749 full pathname (if any) of the Mcc program. After Configure runs,
2750 the value is reset to a plain "Mcc" and is not useful.
2752 mips_type (usrinc.U):
2753 This variable holds the environment type for the mips system.
2754 Possible values are "BSD 4.3" and "System V".
2757 This variable is used internally by Configure to determine the
2758 full pathname (if any) of the mkdir program. After Configure runs,
2759 the value is reset to a plain "mkdir" and is not useful.
2761 mmaptype (d_mmap.U):
2762 This symbol contains the type of pointer returned by mmap()
2763 (and simultaneously the type of the first argument).
2764 It can be 'void *' or 'caddr_t'.
2766 modetype (modetype.U):
2767 This variable defines modetype to be something like mode_t,
2768 int, unsigned short, or whatever type is used to declare file
2769 modes for system calls.
2772 This variable is used internally by Configure to determine the
2773 full pathname (if any) of the more program. After Configure runs,
2774 the value is reset to a plain "more" and is not useful.
2776 multiarch (multiarch.U):
2777 This variable conditionally defines the MULTIARCH symbol
2778 which signifies the presence of multiplatform files.
2779 This is normally set by hints files.
2782 This variable is defined but not used by Configure.
2783 The value is a plain '' and is not useful.
2785 myarchname (archname.U):
2786 This variable holds the architecture name computed by Configure in
2787 a previous run. It is not intended to be perused by any user and
2788 should never be set in a hint file.
2790 mydomain (myhostname.U):
2791 This variable contains the eventual value of the MYDOMAIN symbol,
2792 which is the domain of the host the program is going to run on.
2793 The domain must be appended to myhostname to form a complete host name.
2794 The dot comes with mydomain, and need not be supplied by the program.
2796 myhostname (myhostname.U):
2797 This variable contains the eventual value of the MYHOSTNAME symbol,
2798 which is the name of the host the program is going to run on.
2799 The domain is not kept with hostname, but must be gotten from mydomain.
2800 The dot comes with mydomain, and need not be supplied by the program.
2802 myuname (Oldconfig.U):
2803 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2804 pseudo variables assignments in the output are stripped, thank you. The
2805 whole thing is then lower-cased.
2808 This variable contains the '-n' flag if that is what causes the echo
2809 command to suppress newline. Otherwise it is null. Correct usage is
2810 $echo $n "prompt for a question: $c".
2812 need_va_copy (need_va_copy.U):
2813 This symbol, if defined, indicates that the system stores
2814 the variable argument list datatype, va_list, in a format
2815 that cannot be copied by simple assignment, so that some
2816 other means must be used when copying is required.
2817 As such systems vary in their provision (or non-provision)
2818 of copying mechanisms, handy.h defines a platform-
2819 independent macro, Perl_va_copy(src, dst), to do the job.
2821 netdb_hlen_type (netdbtype.U):
2822 This variable holds the type used for the 2nd argument to
2823 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2824 This is only useful if you have gethostbyaddr(), naturally.
2826 netdb_host_type (netdbtype.U):
2827 This variable holds the type used for the 1st argument to
2828 gethostbyaddr(). Usually, this is char * or void *, possibly
2829 with or without a const prefix.
2830 This is only useful if you have gethostbyaddr(), naturally.
2832 netdb_name_type (netdbtype.U):
2833 This variable holds the type used for the argument to
2834 gethostbyname(). Usually, this is char * or const char *.
2835 This is only useful if you have gethostbyname(), naturally.
2837 netdb_net_type (netdbtype.U):
2838 This variable holds the type used for the 1st argument to
2839 getnetbyaddr(). Usually, this is int or long.
2840 This is only useful if you have getnetbyaddr(), naturally.
2843 This variable is used internally by Configure to determine the
2844 full pathname (if any) of the nm program. After Configure runs,
2845 the value is reset to a plain "nm" and is not useful.
2848 This variable holds the options that may be necessary for nm.
2850 nm_so_opt (usenm.U):
2851 This variable holds the options that may be necessary for nm
2852 to work on a shared library but that can not be used on an
2853 archive library. Currently, this is only used by Linux, where
2854 nm --dynamic is *required* to get symbols from an ELF library which
2855 has been stripped, but nm --dynamic is *fatal* on an archive library.
2856 Maybe Linux should just always set usenm=false.
2858 nonxs_ext (Extensions.U):
2859 This variable holds a list of all non-xs extensions included
2860 in the package. All of them will be built.
2863 This variable is used internally by Configure to determine the
2864 full pathname (if any) of the nroff program. After Configure runs,
2865 the value is reset to a plain "nroff" and is not useful.
2867 nveformat (perlxvf.U):
2868 This variable contains the format string used for printing
2869 a Perl NV using %e-ish floating point format.
2871 nvEUformat (perlxvf.U):
2872 This variable contains the format string used for printing
2873 a Perl NV using %E-ish floating point format.
2875 nvfformat (perlxvf.U):
2876 This variable confains the format string used for printing
2877 a Perl NV using %f-ish floating point format.
2879 nvFUformat (perlxvf.U):
2880 This variable confains the format string used for printing
2881 a Perl NV using %F-ish floating point format.
2883 nvgformat (perlxvf.U):
2884 This variable contains the format string used for printing
2885 a Perl NV using %g-ish floating point format.
2887 nvGUformat (perlxvf.U):
2888 This variable contains the format string used for printing
2889 a Perl NV using %G-ish floating point format.
2892 This variable is the size of an NV in bytes.
2895 This variable contains the C type used for Perl's NV.
2897 o_nonblock (nblock_io.U):
2898 This variable bears the symbol value to be used during open() or fcntl()
2899 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2900 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2901 but that is only supported by some devices.
2904 This is an old synonym for _o.
2906 old_pthread_create_joinable (d_pthrattrj.U):
2907 This variable defines the constant to use for creating joinable
2908 (aka undetached) pthreads. Unused if pthread.h defines
2909 PTHREAD_CREATE_JOINABLE. If used, possible values are
2910 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2912 optimize (ccflags.U):
2913 This variable contains any optimizer/debugger flag that should be used.
2914 It is up to the Makefile to use it.
2916 orderlib (orderlib.U):
2917 This variable is "true" if the components of libraries must be ordered
2918 (with `lorder $* | tsort`) before placing them in an archive. Set to
2919 "false" if ranlib or ar can generate random libraries.
2921 osname (Oldconfig.U):
2922 This variable contains the operating system name (e.g. sunos,
2923 solaris, hpux, etc.). It can be useful later on for setting
2924 defaults. Any spaces are replaced with underscores. It is set
2925 to a null string if we can't figure it out.
2927 osvers (Oldconfig.U):
2928 This variable contains the operating system version (e.g.
2929 4.1.3, 5.2, etc.). It is primarily used for helping select
2930 an appropriate hints file, but might be useful elsewhere for
2931 setting defaults. It is set to '' if we can't figure it out.
2932 We try to be flexible about how much of the version number
2933 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2934 same for this package, hints files might just be os_4.0 or
2935 os_4.1, etc., not keeping separate files for each little release.
2937 otherlibdirs (otherlibdirs.U):
2938 This variable contains a colon-separated set of paths for the perl
2939 binary to search for additional library files or modules.
2940 These directories will be tacked to the end of @INC.
2941 Perl will automatically search below each path for version-
2942 and architecture-specific directories. See inc_version_list
2944 A value of ' ' means 'none' and is used to preserve this value
2945 for the next run through Configure.
2947 package (package.U):
2948 This variable contains the name of the package being constructed.
2949 It is primarily intended for the use of later Configure units.
2952 This variable contains the name of the preferred pager on the system.
2953 Usual values are (the full pathnames of) more, less, pg, or cat.
2956 This variable contains a command that produces the text of the
2957 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2958 "ypcat passwd" when NIS is used.
2959 On some systems, such as os390, there may be no equivalent
2960 command, in which case this variable is unset.
2962 patchlevel (patchlevel.U):
2963 The patchlevel level of this package.
2964 The value of patchlevel comes from the patchlevel.h file.
2965 In a version number such as 5.6.1, this is the "6".
2966 In patchlevel.h, this is referred to as "PERL_VERSION".
2969 This is an old synonym for p_ in Head.U, the character
2970 used to separate elements in the command shell search PATH.
2973 This variable contains the full path (if any) to a previously
2974 installed perl5.005 or later suitable for running the script
2975 to determine inc_version_list.
2978 This variable is defined but not used by Configure.
2979 The value is a plain '' and is not useful.
2981 perl_patchlevel (patchlevel.U):
2982 This is the Perl patch level, a numeric change identifier,
2983 as defined by whichever source code maintenance system
2984 is used to maintain the patches; currently Perforce.
2985 It does not correlate with the Perl version numbers or
2986 the maintenance versus development dichotomy except
2987 by also being increasing.
2989 PERL_REVISION (Oldsyms.U):
2990 In a Perl version number such as 5.6.2, this is the 5.
2991 This value is manually set in patchlevel.h
2993 PERL_SUBVERSION (Oldsyms.U):
2994 In a Perl version number such as 5.6.2, this is the 2.
2995 Values greater than 50 represent potentially unstable
2996 development subversions.
2997 This value is manually set in patchlevel.h
2999 PERL_VERSION (Oldsyms.U):
3000 In a Perl version number such as 5.6.2, this is the 6.
3001 This value is manually set in patchlevel.h
3003 perladmin (perladmin.U):
3004 Electronic mail address of the perl5 administrator.
3007 The list of libraries needed by Perl only (any libraries needed
3008 by extensions only will by dropped, if using dynamic loading).
3010 perlpath (perlpath.U):
3011 This variable contains the eventual value of the PERLPATH symbol,
3012 which contains the name of the perl interpreter to be used in
3013 shell scripts and in the "eval 'exec'" idiom.
3016 This variable is used internally by Configure to determine the
3017 full pathname (if any) of the pg program. After Configure runs,
3018 the value is reset to a plain "pg" and is not useful.
3020 phostname (myhostname.U):
3021 This variable contains the eventual value of the PHOSTNAME symbol,
3022 which is a command that can be fed to popen() to get the host name.
3023 The program should probably not presume that the domain is or isn't
3026 pidtype (pidtype.U):
3027 This variable defines PIDTYPE to be something like pid_t, int,
3028 ushort, or whatever type is used to declare process ids in the kernel.
3031 Holds the private path used by Configure to find out the libraries.
3032 Its value is prepend to libpth. This variable takes care of special
3033 machines, like the mips. Usually, it should be empty.
3035 pm_apiversion (xs_apiversion.U):
3036 This variable contains the version of the oldest perl
3037 compatible with the present perl. (That is, pure perl modules
3038 written for $pm_apiversion will still work for the current
3039 version). perl.c:incpush() and lib/lib.pm will automatically
3040 search in $sitelib for older directories across major versions
3041 back to pm_apiversion. This is only useful if you have a perl
3042 library directory tree structured like the default one. The
3043 versioned site_perl library was introduced in 5.005, so that's
3044 the default setting for this variable. It's hard to imagine
3045 it changing before Perl6. It is included here for symmetry
3046 with xs_apiveprsion -- the searching algorithms will
3047 (presumably) be similar.
3048 See the INSTALL file for how this works.
3051 This variable is defined but not used by Configure.
3052 The value is a plain '' and is not useful.
3055 This variable is defined but not used by Configure.
3056 The value is a plain '' and is not useful.
3059 This variable holds the name of the directory below which the
3060 user will install the package. Usually, this is /usr/local, and
3061 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3062 man pages in /usr/local/man, etc. It is only used to set defaults
3063 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3065 prefixexp (prefix.U):
3066 This variable holds the full absolute path of the directory below
3067 which the user will install the package. Derived from prefix.
3069 privlib (privlib.U):
3070 This variable contains the eventual value of the PRIVLIB symbol,
3071 which is the name of the private library for this package. It may
3072 have a ~ on the front. It is up to the makefile to eventually create
3073 this directory while performing installation (with ~ substitution).
3075 privlibexp (privlib.U):
3076 This variable is the ~name expanded version of privlib, so that you
3077 may use it directly in Makefiles or shell scripts.
3079 prototype (prototype.U):
3080 This variable holds the eventual value of CAN_PROTOTYPE, which
3081 indicates the C compiler can handle funciton prototypes.
3083 ptrsize (ptrsize.U):
3084 This variable contains the value of the PTRSIZE symbol, which
3085 indicates to the C program how many bytes there are in a pointer.
3087 quadkind (quadtype.U):
3088 This variable, if defined, encodes the type of a quad:
3089 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3091 quadtype (quadtype.U):
3092 This variable defines Quad_t to be something like long, int,
3093 long long, int64_t, or whatever type is used for 64-bit integers.
3095 randbits (randfunc.U):
3096 Indicates how many bits are produced by the function used to
3097 generate normalized random numbers.
3099 randfunc (randfunc.U):
3100 Indicates the name of the random number function to use.
3101 Values include drand48, random, and rand. In C programs,
3102 the 'Drand01' macro is defined to generate uniformly distributed
3103 random numbers over the range [0., 1.[ (see drand01 and nrand).
3105 randseedtype (randfunc.U):
3106 Indicates the type of the argument of the seedfunc.
3108 ranlib (orderlib.U):
3109 This variable is set to the pathname of the ranlib program, if it is
3110 needed to generate random libraries. Set to ":" if ar can generate
3111 random libraries or if random libraries are not supported
3113 rd_nodata (nblock_io.U):
3114 This variable holds the return code from read() when no data is
3115 present. It should be -1, but some systems return 0 when O_NDELAY is
3116 used, which is a shame because you cannot make the difference between
3117 no data and an EOF.. Sigh!
3119 revision (patchlevel.U):
3120 The value of revision comes from the patchlevel.h file.
3121 In a version number such as 5.6.1, this is the "5".
3122 In patchlevel.h, this is referred to as "PERL_REVISION".
3125 This variable is used internally by Configure to determine the
3126 full pathname (if any) of the rm program. After Configure runs,
3127 the value is reset to a plain "rm" and is not useful.
3130 This variable is defined but not used by Configure.
3131 The value is a plain '' and is not useful.
3134 This variable contains 'true' or 'false' depending whether the
3135 nm extraction should be performed or not, according to the value
3136 of usenm and the flags on the Configure command line.
3138 sched_yield (d_pthread_y.U):
3139 This variable defines the way to yield the execution
3140 of the current thread.
3142 scriptdir (scriptdir.U):
3143 This variable holds the name of the directory in which the user wants
3144 to put publicly scripts for the package in question. It is either
3145 the same directory as for binaries, or a special one that can be
3146 mounted across different architectures, like /usr/share. Programs
3147 must be prepared to deal with ~name expansion.
3149 scriptdirexp (scriptdir.U):
3150 This variable is the same as scriptdir, but is filename expanded
3151 at configuration time, for programs not wanting to bother with it.
3154 This variable is used internally by Configure to determine the
3155 full pathname (if any) of the sed program. After Configure runs,
3156 the value is reset to a plain "sed" and is not useful.
3158 seedfunc (randfunc.U):
3159 Indicates the random number generating seed function.
3160 Values include srand48, srandom, and srand.
3162 selectminbits (selectminbits.U):
3163 This variable holds the minimum number of bits operated by select.
3164 That is, if you do select(n, ...), how many bits at least will be
3165 cleared in the masks if some activity is detected. Usually this
3166 is either n or 32*ceil(n/32), especially many little-endians do
3167 the latter. This is only useful if you have select(), naturally.
3169 selecttype (selecttype.U):
3170 This variable holds the type used for the 2nd, 3rd, and 4th
3171 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3172 is defined, and 'int *' otherwise. This is only useful if you
3173 have select(), naturally.
3176 This variable is defined but not used by Configure.
3177 The value is a plain '' and is not useful.
3180 This variable contains the full pathname of the shell used
3181 on this system to execute Bourne shell scripts. Usually, this will be
3182 /bin/sh, though it's possible that some systems will have /bin/ksh,
3183 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3185 This unit comes before Options.U, so you can't set sh with a '-D'
3186 option, though you can override this (and startsh)
3187 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3190 This variable is defined but not used by Configure.
3191 The value is a plain '' and is not useful.
3193 sharpbang (spitshell.U):
3194 This variable contains the string #! if this system supports that
3197 shmattype (d_shmat.U):
3198 This symbol contains the type of pointer returned by shmat().
3199 It can be 'void *' or 'char *'.
3201 shortsize (intsize.U):
3202 This variable contains the value of the SHORTSIZE symbol which
3203 indicates to the C program how many bytes there are in a short.
3205 shrpenv (libperl.U):
3206 If the user builds a shared libperl.so, then we need to tell the
3207 'perl' executable where it will be able to find the installed libperl.so.
3208 One way to do this on some systems is to set the environment variable
3209 LD_RUN_PATH to the directory that will be the final location of the
3210 shared libperl.so. The makefile can use this with something like
3211 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3213 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3216 See the main perl Makefile.SH for actual working usage.
3217 Alternatively, we might be able to use a command line option such
3218 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3219 $archlibexp/CORE (Linux).
3221 shsharp (spitshell.U):
3222 This variable tells further Configure units whether your sh can
3225 sig_count (sig_name.U):
3226 This variable holds a number larger than the largest valid
3227 signal number. This is usually the same as the NSIG macro.
3229 sig_name (sig_name.U):
3230 This variable holds the signal names, space separated. The leading
3231 SIG in signal name is removed. A ZERO is prepended to the
3232 list. This is currently not used.
3234 sig_name_init (sig_name.U):
3235 This variable holds the signal names, enclosed in double quotes and
3236 separated by commas, suitable for use in the SIG_NAME definition
3237 below. A "ZERO" is prepended to the list, and the list is
3238 terminated with a plain 0. The leading SIG in signal names
3239 is removed. See sig_num.
3241 sig_num (sig_name.U):
3242 This variable holds the signal numbers, space separated. A ZERO is
3243 prepended to the list (corresponding to the fake SIGZERO), and
3244 the list is terminated with a 0. Those numbers correspond to
3245 the value of the signal listed in the same place within the
3248 sig_num_init (sig_name.U):
3249 This variable holds the signal numbers, enclosed in double quotes and
3250 separated by commas, suitable for use in the SIG_NUM definition
3251 below. A "ZERO" is prepended to the list, and the list is
3252 terminated with a plain 0.
3254 sig_size (sig_name.U):
3255 This variable contains the number of elements of the sig_name
3256 and sig_num arrays, excluding the final NULL entry.
3258 signal_t (d_voidsig.U):
3259 This variable holds the type of the signal handler (void or int).
3261 sitearch (sitearch.U):
3262 This variable contains the eventual value of the SITEARCH symbol,
3263 which is the name of the private library for this package. It may
3264 have a ~ on the front. It is up to the makefile to eventually create
3265 this directory while performing installation (with ~ substitution).
3266 The standard distribution will put nothing in this directory.
3267 After perl has been installed, users may install their own local
3268 architecture-dependent modules in this directory with
3269 MakeMaker Makefile.PL
3270 or equivalent. See INSTALL for details.
3272 sitearchexp (sitearch.U):
3273 This variable is the ~name expanded version of sitearch, so that you
3274 may use it directly in Makefiles or shell scripts.
3276 sitebin (sitebin.U):
3277 This variable holds the name of the directory in which the user wants
3278 to put add-on publicly executable files for the package in question. It
3279 is most often a local directory such as /usr/local/bin. Programs using
3280 this variable must be prepared to deal with ~name substitution.
3281 The standard distribution will put nothing in this directory.
3282 After perl has been installed, users may install their own local
3283 executables in this directory with
3284 MakeMaker Makefile.PL
3285 or equivalent. See INSTALL for details.
3287 sitebinexp (sitebin.U):
3288 This is the same as the sitebin variable, but is filename expanded at
3289 configuration time, for use in your makefiles.
3291 sitelib (sitelib.U):
3292 This variable contains the eventual value of the SITELIB symbol,
3293 which is the name of the private library for this package. It may
3294 have a ~ on the front. It is up to the makefile to eventually create
3295 this directory while performing installation (with ~ substitution).
3296 The standard distribution will put nothing in this directory.
3297 After perl has been installed, users may install their own local
3298 architecture-independent modules in this directory with
3299 MakeMaker Makefile.PL
3300 or equivalent. See INSTALL for details.
3302 sitelib_stem (sitelib.U):
3303 This variable is $sitelibexp with any trailing version-specific component
3304 removed. The elements in inc_version_list (inc_version_list.U) can
3305 be tacked onto this variable to generate a list of directories to search.
3307 sitelibexp (sitelib.U):
3308 This variable is the ~name expanded version of sitelib, so that you
3309 may use it directly in Makefiles or shell scripts.
3311 siteprefix (siteprefix.U):
3312 This variable holds the full absolute path of the directory below
3313 which the user will install add-on packages.
3314 See INSTALL for usage and examples.
3316 siteprefixexp (siteprefix.U):
3317 This variable holds the full absolute path of the directory below
3318 which the user will install add-on packages. Derived from siteprefix.
3320 sizesize (sizesize.U):
3321 This variable contains the size of a sizetype in bytes.
3323 sizetype (sizetype.U):
3324 This variable defines sizetype to be something like size_t,
3325 unsigned long, or whatever type is used to declare length
3326 parameters for string functions.
3329 This variable is defined but not used by Configure.
3330 The value is a plain '' and is not useful.
3333 This variable is defined but not used by Configure.
3334 The value is a plain '' and is not useful.
3337 This variable holds the extension used to identify shared libraries
3338 (also known as shared objects) on the system. Usually set to 'so'.
3340 sockethdr (d_socket.U):
3341 This variable has any cpp '-I' flags needed for socket support.
3343 socketlib (d_socket.U):
3344 This variable has the names of any libraries needed for socket support.
3346 socksizetype (socksizetype.U):
3347 This variable holds the type used for the size argument
3348 for various socket calls like accept. Usual values include
3349 socklen_t, size_t, and int.
3352 This variable is used internally by Configure to determine the
3353 full pathname (if any) of the sort program. After Configure runs,
3354 the value is reset to a plain "sort" and is not useful.
3356 spackage (package.U):
3357 This variable contains the name of the package being constructed,
3358 with the first letter uppercased, i.e. suitable for starting
3361 spitshell (spitshell.U):
3362 This variable contains the command necessary to spit out a runnable
3363 shell on this system. It is either cat or a grep '-v' for # comments.
3365 sPRId64 (quadfio.U):
3366 This variable, if defined, contains the string used by stdio to
3367 format 64-bit decimal numbers (format 'd') for output.
3369 sPRIeldbl (longdblfio.U):
3370 This variable, if defined, contains the string used by stdio to
3371 format long doubles (format 'e') for output.
3373 sPRIEUldbl (longdblfio.U):
3374 This variable, if defined, contains the string used by stdio to
3375 format long doubles (format 'E') for output.
3376 The 'U' in the name is to separate this from sPRIeldbl so that even
3377 case-blind systems can see the difference.
3379 sPRIfldbl (longdblfio.U):
3380 This variable, if defined, contains the string used by stdio to
3381 format long doubles (format 'f') for output.
3383 sPRIFUldbl (longdblfio.U):
3384 This variable, if defined, contains the string used by stdio to
3385 format long doubles (format 'F') for output.
3386 The 'U' in the name is to separate this from sPRIfldbl so that even
3387 case-blind systems can see the difference.
3389 sPRIgldbl (longdblfio.U):
3390 This variable, if defined, contains the string used by stdio to
3391 format long doubles (format 'g') for output.
3393 sPRIGUldbl (longdblfio.U):
3394 This variable, if defined, contains the string used by stdio to
3395 format long doubles (format 'G') for output.
3396 The 'U' in the name is to separate this from sPRIgldbl so that even
3397 case-blind systems can see the difference.
3399 sPRIi64 (quadfio.U):
3400 This variable, if defined, contains the string used by stdio to
3401 format 64-bit decimal numbers (format 'i') for output.
3403 sPRIo64 (quadfio.U):
3404 This variable, if defined, contains the string used by stdio to
3405 format 64-bit octal numbers (format 'o') for output.
3407 sPRIu64 (quadfio.U):
3408 This variable, if defined, contains the string used by stdio to
3409 format 64-bit unsigned decimal numbers (format 'u') for output.
3411 sPRIx64 (quadfio.U):
3412 This variable, if defined, contains the string used by stdio to
3413 format 64-bit hexadecimal numbers (format 'x') for output.
3415 sPRIXU64 (quadfio.U):
3416 This variable, if defined, contains the string used by stdio to
3417 format 64-bit hExADECimAl numbers (format 'X') for output.
3418 The 'U' in the name is to separate this from sPRIx64 so that even
3419 case-blind systems can see the difference.
3422 This variable holds the path to the package source. It is up to
3423 the Makefile to use this variable and set VPATH accordingly to
3424 find the sources remotely.
3426 sSCNfldbl (longdblfio.U):
3427 This variable, if defined, contains the string used by stdio to
3428 format long doubles (format 'f') for input.
3430 ssizetype (ssizetype.U):
3431 This variable defines ssizetype to be something like ssize_t,
3432 long or int. It is used by functions that return a count
3433 of bytes or an error condition. It must be a signed type.
3434 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3436 startperl (startperl.U):
3437 This variable contains the string to put on the front of a perl
3438 script to make sure (hopefully) that it runs with perl and not some
3439 shell. Of course, that leading line must be followed by the classical
3441 eval 'exec perl -S $0 ${1+"$@"}'
3442 if $running_under_some_shell;
3443 to guarantee perl startup should the shell execute the script. Note
3444 that this magic incatation is not understood by csh.
3446 startsh (startsh.U):
3447 This variable contains the string to put on the front of a shell
3448 script to make sure (hopefully) that it runs with sh and not some
3451 static_ext (Extensions.U):
3452 This variable holds a list of XS extension files we want to
3453 link statically into the package. It is used by Makefile.
3455 stdchar (stdchar.U):
3456 This variable conditionally defines STDCHAR to be the type of char
3457 used in stdio.h. It has the values "unsigned char" or "char".
3459 stdio_base (d_stdstdio.U):
3460 This variable defines how, given a FILE pointer, fp, to access the
3461 _base field (or equivalent) of stdio.h's FILE structure. This will
3462 be used to define the macro FILE_base(fp).
3464 stdio_bufsiz (d_stdstdio.U):
3465 This variable defines how, given a FILE pointer, fp, to determine
3466 the number of bytes store in the I/O buffer pointer to by the
3467 _base field (or equivalent) of stdio.h's FILE structure. This will
3468 be used to define the macro FILE_bufsiz(fp).
3470 stdio_cnt (d_stdstdio.U):
3471 This variable defines how, given a FILE pointer, fp, to access the
3472 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3473 be used to define the macro FILE_cnt(fp).
3475 stdio_filbuf (d_stdstdio.U):
3476 This variable defines how, given a FILE pointer, fp, to tell
3477 stdio to refill it's internal buffers (?). This will
3478 be used to define the macro FILE_filbuf(fp).
3480 stdio_ptr (d_stdstdio.U):
3481 This variable defines how, given a FILE pointer, fp, to access the
3482 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3483 be used to define the macro FILE_ptr(fp).
3485 stdio_stream_array (stdio_streams.U):
3486 This variable tells the name of the array holding the stdio streams.
3487 Usual values include _iob, __iob, and __sF.
3489 strings (i_string.U):
3490 This variable holds the full path of the string header that will be
3491 used. Typically /usr/include/string.h or /usr/include/strings.h.
3494 This variable is defined but not used by Configure.
3495 The value is a plain '' and is not useful.
3497 subversion (patchlevel.U):
3498 The subversion level of this package.
3499 The value of subversion comes from the patchlevel.h file.
3500 In a version number such as 5.6.1, this is the "1".
3501 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3502 This is unique to perl.
3505 This variable holds the place where the manual is located on this
3506 system. It is not the place where the user wants to put his manual
3507 pages. Rather it is the place where Configure may look to find manual
3508 for unix commands (section 1 of the manual usually). See mansrc.
3511 This variable is defined but not used by Configure.
3512 The value is a plain '' and is not useful.
3515 This variable is defined but not used by Configure.
3516 The value is a plain '' and is not useful.
3519 This variable is defined but not used by Configure.
3520 The value is a plain '' and is not useful.
3523 This variable is defined but not used by Configure.
3524 The value is a plain '' and is not useful.
3527 This variable is used internally by Configure to determine the
3528 full pathname (if any) of the test program. After Configure runs,
3529 the value is reset to a plain "test" and is not useful.
3531 timeincl (i_time.U):
3532 This variable holds the full path of the included time header(s).
3534 timetype (d_time.U):
3535 This variable holds the type returned by time(). It can be long,
3536 or time_t on BSD sites (in which case <sys/types.h> should be
3537 included). Anyway, the type Time_t should be used.
3540 This variable is used internally by Configure to determine the
3541 full pathname (if any) of the touch program. After Configure runs,
3542 the value is reset to a plain "touch" and is not useful.
3545 This variable is used internally by Configure to determine the
3546 full pathname (if any) of the tr program. After Configure runs,
3547 the value is reset to a plain "tr" and is not useful.
3550 This variable contains the value to be passed to the tr(1)
3551 command to transliterate a newline. Typical values are
3552 '\012' and '\n'. This is needed for EBCDIC systems where
3553 newline is not necessarily '\012'.
3556 This variable is defined but not used by Configure.
3557 The value is a plain '' and is not useful.
3560 This variable is the size of an U16 in bytes.
3563 This variable contains the C type used for Perl's U16.
3566 This variable is the size of an U32 in bytes.
3569 This variable contains the C type used for Perl's U32.
3572 This variable is the size of an U64 in bytes.
3575 This variable contains the C type used for Perl's U64.
3578 This variable is the size of an U8 in bytes.
3581 This variable contains the C type used for Perl's U8.
3584 This variable contains the format string used for printing a Uid_t.
3586 uidsign (uidsign.U):
3587 This variable contains the signedness of a uidtype.
3588 1 for unsigned, -1 for signed.
3590 uidsize (uidsize.U):
3591 This variable contains the size of a uidtype in bytes.
3593 uidtype (uidtype.U):
3594 This variable defines Uid_t to be something like uid_t, int,
3595 ushort, or whatever type is used to declare user ids in the kernel.
3598 This variable is used internally by Configure to determine the
3599 full pathname (if any) of the uname program. After Configure runs,
3600 the value is reset to a plain "uname" and is not useful.
3603 This variable is used internally by Configure to determine the
3604 full pathname (if any) of the uniq program. After Configure runs,
3605 the value is reset to a plain "uniq" and is not useful.
3607 uquadtype (quadtype.U):
3608 This variable defines Uquad_t to be something like unsigned long,
3609 unsigned int, unsigned long long, uint64_t, or whatever type is
3610 used for 64-bit integers.
3612 use5005threads (usethreads.U):
3613 This variable conditionally defines the USE_5005THREADS symbol,
3614 and indicates that Perl should be built to use the 5.005-based
3615 threading implementation.
3617 use64bitall (use64bits.U):
3618 This variable conditionally defines the USE_64_BIT_ALL symbol,
3619 and indicates that 64-bit integer types should be used
3620 when available. The maximal possible
3621 64-bitness is employed: LP64 or ILP64, meaning that you will
3622 be able to use more than 2 gigabytes of memory. This mode is
3623 even more binary incompatible than USE_64_BIT_INT. You may not
3624 be able to run the resulting executable in a 32-bit CPU at all or
3625 you may need at least to reboot your OS to 64-bit mode.
3627 use64bitint (use64bits.U):
3628 This variable conditionally defines the USE_64_BIT_INT symbol,
3629 and indicates that 64-bit integer types should be used
3630 when available. The minimal possible 64-bitness
3631 is employed, just enough to get 64-bit integers into Perl.
3632 This may mean using for example "long longs", while your memory
3633 may still be limited to 2 gigabytes.
3636 This variable indicates if the system supports dynamic
3637 loading of some sort. See also dlsrc and dlobj.
3639 useithreads (usethreads.U):
3640 This variable conditionally defines the USE_ITHREADS symbol,
3641 and indicates that Perl should be built to use the interpreter-based
3642 threading implementation.
3644 uselargefiles (uselfs.U):
3645 This variable conditionally defines the USE_LARGE_FILES symbol,
3646 and indicates that large file interfaces should be used when
3649 uselongdouble (uselongdbl.U):
3650 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3651 and indicates that long doubles should be used when available.
3653 usemorebits (usemorebits.U):
3654 This variable conditionally defines the USE_MORE_BITS symbol,
3655 and indicates that explicit 64-bit interfaces and long doubles
3656 should be used when available.
3658 usemultiplicity (usemultiplicity.U):
3659 This variable conditionally defines the MULTIPLICITY symbol,
3660 and indicates that Perl should be built to use multiplicity.
3662 usemymalloc (mallocsrc.U):
3663 This variable contains y if the malloc that comes with this package
3664 is desired over the system's version of malloc. People often include
3665 special versions of malloc for effiency, but such versions are often
3666 less portable. See also mallocsrc and mallocobj.
3667 If this is 'y', then -lmalloc is removed from $libs.
3670 This variable contains 'true' or 'false' depending whether the
3671 nm extraction is wanted or not.
3673 useopcode (Extensions.U):
3674 This variable holds either 'true' or 'false' to indicate
3675 whether the Opcode extension should be used. The sole
3676 use for this currently is to allow an easy mechanism
3677 for users to skip the Opcode extension from the Configure
3680 useperlio (useperlio.U):
3681 This variable conditionally defines the USE_PERLIO symbol,
3682 and indicates that the PerlIO abstraction should be
3685 useposix (Extensions.U):
3686 This variable holds either 'true' or 'false' to indicate
3687 whether the POSIX extension should be used. The sole
3688 use for this currently is to allow an easy mechanism
3689 for hints files to indicate that POSIX will not compile
3690 on a particular system.
3693 This variable is set to true when the user agrees to use sfio.
3694 It is set to false when sfio is not available or when the user
3695 explicitely requests not to use sfio. It is here primarily so
3696 that command-line settings can override the auto-detection of
3697 d_sfio without running into a "WHOA THERE".
3699 useshrplib (libperl.U):
3700 This variable is set to 'yes' if the user wishes
3701 to build a shared libperl, and 'no' otherwise.
3703 usesocks (usesocks.U):
3704 This variable conditionally defines the USE_SOCKS symbol,
3705 and indicates that Perl should be built to use SOCKS.
3707 usethreads (usethreads.U):
3708 This variable conditionally defines the USE_THREADS symbol,
3709 and indicates that Perl should be built to use threads.
3711 usevendorprefix (vendorprefix.U):
3712 This variable tells whether the vendorprefix
3713 and consequently other vendor* paths are in use.
3715 usevfork (d_vfork.U):
3716 This variable is set to true when the user accepts to use vfork.
3717 It is set to false when no vfork is available or when the user
3718 explicitely requests not to use vfork.
3721 This variable holds the path of the include files, which is
3722 usually /usr/include. It is mainly used by other Configure units.
3725 This variable is defined but not used by Configure.
3726 The value is a plain '' and is not useful.
3728 uvoformat (perlxvf.U):
3729 This variable contains the format string used for printing
3730 a Perl UV as an unsigned octal integer.
3733 This variable is the size of a UV in bytes.
3736 This variable contains the C type used for Perl's UV.
3738 uvuformat (perlxvf.U):
3739 This variable contains the format string used for printing
3740 a Perl UV as an unsigned decimal integer.
3742 uvxformat (perlxvf.U):
3743 This variable contains the format string used for printing
3744 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3746 uvXUformat (perlxvf.U):
3747 This variable contains the format string used for printing
3748 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3750 vendorarch (vendorarch.U):
3751 This variable contains the value of the PERL_VENDORARCH symbol.
3752 It may have a ~ on the front.
3753 The standard distribution will put nothing in this directory.
3754 Vendors who distribute perl may wish to place their own
3755 architecture-dependent modules and extensions in this directory with
3756 MakeMaker Makefile.PL INSTALLDIRS=vendor
3757 or equivalent. See INSTALL for details.
3759 vendorarchexp (vendorarch.U):
3760 This variable is the ~name expanded version of vendorarch, so that you
3761 may use it directly in Makefiles or shell scripts.
3763 vendorbin (vendorbin.U):
3764 This variable contains the eventual value of the VENDORBIN symbol.
3765 It may have a ~ on the front.
3766 The standard distribution will put nothing in this directory.
3767 Vendors who distribute perl may wish to place additional
3768 binaries in this directory with
3769 MakeMaker Makefile.PL INSTALLDIRS=vendor
3770 or equivalent. See INSTALL for details.
3772 vendorbinexp (vendorbin.U):
3773 This variable is the ~name expanded version of vendorbin, so that you
3774 may use it directly in Makefiles or shell scripts.
3776 vendorlib (vendorlib.U):
3777 This variable contains the eventual value of the VENDORLIB symbol,
3778 which is the name of the private library for this package.
3779 The standard distribution will put nothing in this directory.
3780 Vendors who distribute perl may wish to place their own
3781 modules in this directory with
3782 MakeMaker Makefile.PL INSTALLDIRS=vendor
3783 or equivalent. See INSTALL for details.
3785 vendorlib_stem (vendorlib.U):
3786 This variable is $vendorlibexp with any trailing version-specific component
3787 removed. The elements in inc_version_list (inc_version_list.U) can
3788 be tacked onto this variable to generate a list of directories to search.
3790 vendorlibexp (vendorlib.U):
3791 This variable is the ~name expanded version of vendorlib, so that you
3792 may use it directly in Makefiles or shell scripts.
3794 vendorprefix (vendorprefix.U):
3795 This variable holds the full absolute path of the directory below
3796 which the vendor will install add-on packages.
3797 See INSTALL for usage and examples.
3799 vendorprefixexp (vendorprefix.U):
3800 This variable holds the full absolute path of the directory below
3801 which the vendor will install add-on packages. Derived from vendorprefix.
3803 version (patchlevel.U):
3804 The full version number of this package, such as 5.6.1 (or 5_6_1).
3805 This combines revision, patchlevel, and subversion to get the
3806 full version number, including any possible subversions.
3807 This is suitable for use as a directory name, and hence is
3808 filesystem dependent.
3810 versiononly (versiononly.U):
3811 If set, this symbol indicates that only the version-specific
3812 components of a perl installation should be installed.
3813 This may be useful for making a test installation of a new
3814 version without disturbing the existing installation.
3815 Setting versiononly is equivalent to setting installperl's -v option.
3816 In particular, the non-versioned scripts and programs such as
3817 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3818 (see INSTALL for a more complete list). Nor are the man
3820 Usually, this is undef.
3823 This variable is defined but not used by Configure.
3824 The value is a plain '' and is not useful.
3826 voidflags (voidflags.U):
3827 This variable contains the eventual value of the VOIDFLAGS symbol,
3828 which indicates how much support of the void type is given by this
3829 compiler. See VOIDFLAGS for more info.
3832 This variable holds extra path (space-separated) used to find
3833 libraries on this platform, for example CPU-specific libraries
3834 (on multi-CPU platforms) may be listed here.
3836 xs_apiversion (xs_apiversion.U):
3837 This variable contains the version of the oldest perl binary
3838 compatible with the present perl. perl.c:incpush() and
3839 lib/lib.pm will automatically search in $sitearch for older
3840 directories across major versions back to xs_apiversion.
3841 This is only useful if you have a perl library directory tree
3842 structured like the default one.
3843 See INSTALL for how this works.
3844 The versioned site_perl directory was introduced in 5.005,
3845 so that is the lowest possible value.
3846 Since this can depend on compile time options (such as
3847 bincompat) it is set by Configure. Other non-default sources
3848 of potential incompatibility, such as multiplicity, threads,
3849 debugging, 64bits, sfio, etc., are not checked for currently,
3850 though in principle we could go snooping around in old
3854 This variable holds the name of the compiler compiler we
3855 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3858 This variable contains any additional yacc flags desired by the
3859 user. It is up to the Makefile to use this.
3862 This variable is defined but not used by Configure.
3863 The value is a plain '' and is not useful.
3866 This variable is used internally by Configure to determine the
3867 full pathname (if any) of the zip program. After Configure runs,
3868 the value is reset to a plain "zip" and is not useful.