1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if Perl 5.006 should be binary-compatible
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
179 cccdlflags (dlsrc.U):
180 This variable contains any special flags that might need to be
181 passed with 'cc -c' to compile modules to be used to create a shared
182 library that will be used for dynamic loading. For hpux, this
183 should be +z. It is up to the makefile to use it.
186 This variable contains any special flags that might need to be
187 passed to cc to link with a shared library for dynamic loading.
188 It is up to the makefile to use it. For sunos 4.1, it should
192 This variable contains any additional C compiler flags desired by
193 the user. It is up to the Makefile to use this.
195 ccsymbols (Cppsym.U):
196 The variable contains the symbols defined by the C compiler alone.
197 The symbols defined by cpp or by cc when it calls cpp are not in
198 this list, see cppsymbols and cppccsymbols.
199 The list is a space-separated list of symbol=value tokens.
202 Login name of the person who ran the Configure script and answered the
203 questions. This is used to tag both config.sh and config_h.SH.
205 cf_email (cf_email.U):
206 Electronic mail address of the person who ran Configure. This can be
207 used by units that require the user's e-mail, like MailList.U.
210 Holds the output of the "date" command when the configuration file was
211 produced. This is used to tag both config.sh and config_h.SH.
213 charsize (charsize.U):
214 This variable contains the value of the CHARSIZE symbol, which
215 indicates to the C program how many bytes there are in a character.
218 This variable is defined but not used by Configure.
219 The value is a plain '' and is not useful.
222 This variable is defined but not used by Configure.
223 The value is a plain '' and is not useful.
226 This variable is defined but not used by Configure.
227 The value is a plain '' and is not useful.
229 clocktype (d_times.U):
230 This variable holds the type returned by times(). It can be long,
231 or clock_t on BSD sites (in which case <sys/types.h> should be
235 This variable is used internally by Configure to determine the
236 full pathname (if any) of the comm program. After Configure runs,
237 the value is reset to a plain "comm" and is not useful.
240 This variable is defined but not used by Configure.
241 The value is a plain '' and is not useful.
243 CONFIGDOTSH (Oldsyms.U):
244 This is set to 'true' in config.sh so that a shell script
245 sourcing config.sh can tell if it has been sourced already.
247 contains (contains.U):
248 This variable holds the command to do a grep with a proper return
249 status. On most sane systems it is simply "grep". On insane systems
250 it is a grep followed by a cat followed by a test. This variable
251 is primarily for the use of other Configure units.
254 This variable is used internally by Configure to determine the
255 full pathname (if any) of the cp program. After Configure runs,
256 the value is reset to a plain "cp" and is not useful.
259 This variable is defined but not used by Configure.
260 The value is a plain '' and is not useful.
263 This variable is used internally by Configure to determine the
264 full pathname (if any) of the cpp program. After Configure runs,
265 the value is reset to a plain "cpp" and is not useful.
267 cpp_stuff (cpp_stuff.U):
268 This variable contains an identification of the catenation mechanism
269 used by the C preprocessor.
271 cppccsymbols (Cppsym.U):
272 The variable contains the symbols defined by the C compiler
273 when it calls cpp. The symbols defined by the cc alone or cpp
274 alone are not in this list, see ccsymbols and cppsymbols.
275 The list is a space-separated list of symbol=value tokens.
277 cppflags (ccflags.U):
278 This variable holds the flags that will be passed to the C pre-
279 processor. It is up to the Makefile to use it.
281 cpplast (cppstdin.U):
282 This variable has the same functionality as cppminus, only it applies
283 to cpprun and not cppstdin.
285 cppminus (cppstdin.U):
286 This variable contains the second part of the string which will invoke
287 the C preprocessor on the standard input and produce to standard
288 output. This variable will have the value "-" if cppstdin needs
289 a minus to specify standard input, otherwise the value is "".
292 This variable contains the command which will invoke a C preprocessor
293 on standard input and put the output to stdout. It is guaranteed not
294 to be a wrapper and may be a null string if no preprocessor can be
295 made directly available. This preprocessor might be different from the
296 one used by the C compiler. Don't forget to append cpplast after the
297 preprocessor options.
299 cppstdin (cppstdin.U):
300 This variable contains the command which will invoke the C
301 preprocessor on standard input and put the output to stdout.
302 It is primarily used by other Configure units that ask about
303 preprocessor symbols.
305 cppsymbols (Cppsym.U):
306 The variable contains the symbols defined by the C preprocessor
307 alone. The symbols defined by cc or by cc when it calls cpp are
308 not in this list, see ccsymbols and cppccsymbols.
309 The list is a space-separated list of symbol=value tokens.
311 crosscompile (crosscompile.U):
312 This variable conditionally defines the CROSSCOMPILE symbol
313 which signifies that the build process is be a cross-compilation.
314 This is normally set by hints files or from Configure command line.
316 cryptlib (d_crypt.U):
317 This variable holds -lcrypt or the path to a libcrypt.a archive if
318 the crypt() function is not defined in the standard C library. It is
319 up to the Makefile to use this.
322 This variable is used internally by Configure to determine the
323 full pathname (if any) of the csh program. After Configure runs,
324 the value is reset to a plain "csh" and is not useful.
326 d_access (d_access.U):
327 This variable conditionally defines HAS_ACCESS if the access() system
328 call is available to check for access permissions using real IDs.
330 d_accessx (d_accessx.U):
331 This variable conditionally defines the HAS_ACCESSX symbol, which
332 indicates to the C program that the accessx() routine is available.
335 This variable conditionally defines the HAS_ALARM symbol, which
336 indicates to the C program that the alarm() routine is available.
338 d_archlib (archlib.U):
339 This variable conditionally defines ARCHLIB to hold the pathname
340 of architecture-dependent library files for $package. If
341 $archlib is the same as $privlib, then this is set to undef.
344 This variable conditionally defines the HAS_ATOLF symbol, which
345 indicates to the C program that the atolf() routine is available.
348 This variable conditionally defines the HAS_ATOLL symbol, which
349 indicates to the C program that the atoll() routine is available.
351 d_attribut (d_attribut.U):
352 This variable conditionally defines HASATTRIBUTE, which
353 indicates the C compiler can check for function attributes,
354 such as printf formats.
357 This variable conditionally defines the HAS_BCMP symbol if
358 the bcmp() routine is available to compare strings.
361 This variable conditionally defines the HAS_BCOPY symbol if
362 the bcopy() routine is available to copy strings.
364 d_bincompat5005 (bincompat5005.U):
365 This variable conditionally defines BINCOMPAT5005 so that embed.h
366 can take special action if Perl 5.006 should be binary-compatible
367 with Perl 5.005. This is impossible for builds that use features
368 like threads and multiplicity it is always $undef for those versions.
371 This symbol conditionally defines the symbol BSD when running on a
374 d_bsdgetpgrp (d_getpgrp.U):
375 This variable conditionally defines USE_BSD_GETPGRP if
376 getpgrp needs one arguments whereas USG one needs none.
378 d_bsdsetpgrp (d_setpgrp.U):
379 This variable conditionally defines USE_BSD_SETPGRP if
380 setpgrp needs two arguments whereas USG one needs none.
381 See also d_setpgid for a POSIX interface.
384 This variable conditionally defines the HAS_BZERO symbol if
385 the bzero() routine is available to set memory to 0.
387 d_casti32 (d_casti32.U):
388 This variable conditionally defines CASTI32, which indicates
389 whether the C compiler can cast large floats to 32-bit ints.
391 d_castneg (d_castneg.U):
392 This variable conditionally defines CASTNEG, which indicates
393 wether the C compiler can cast negative float to unsigned.
395 d_charvspr (d_vprintf.U):
396 This variable conditionally defines CHARVSPRINTF if this system
397 has vsprintf returning type (char*). The trend seems to be to
398 declare it as "int vsprintf()".
401 This variable conditionally defines the HAS_CHOWN symbol, which
402 indicates to the C program that the chown() routine is available.
404 d_chroot (d_chroot.U):
405 This variable conditionally defines the HAS_CHROOT symbol, which
406 indicates to the C program that the chroot() routine is available.
408 d_chsize (d_chsize.U):
409 This variable conditionally defines the CHSIZE symbol, which
410 indicates to the C program that the chsize() routine is available
411 to truncate files. You might need a -lx to get this routine.
413 d_closedir (d_closedir.U):
414 This variable conditionally defines HAS_CLOSEDIR if closedir() is
418 This variable conditionally defines the HASCONST symbol, which
419 indicates to the C program that this C compiler knows about the
423 This variable conditionally defines the CRYPT symbol, which
424 indicates to the C program that the crypt() routine is available
425 to encrypt passwords and the like.
428 This variable conditionally defines the CSH symbol, which
429 indicates to the C program that the C-shell exists.
431 d_cuserid (d_cuserid.U):
432 This variable conditionally defines the HAS_CUSERID symbol, which
433 indicates to the C program that the cuserid() routine is available
434 to get character login names.
436 d_dbl_dig (d_dbl_dig.U):
437 This variable conditionally defines d_dbl_dig if this system's
438 header files provide DBL_DIG, which is the number of significant
439 digits in a double precision number.
441 d_difftime (d_difftime.U):
442 This variable conditionally defines the HAS_DIFFTIME symbol, which
443 indicates to the C program that the difftime() routine is available.
445 d_dirnamlen (i_dirent.U):
446 This variable conditionally defines DIRNAMLEN, which indicates
447 to the C program that the length of directory entry names is
448 provided by a d_namelen field.
450 d_dlerror (d_dlerror.U):
451 This variable conditionally defines the HAS_DLERROR symbol, which
452 indicates to the C program that the dlerror() routine is available.
454 d_dlopen (d_dlopen.U):
455 This variable conditionally defines the HAS_DLOPEN symbol, which
456 indicates to the C program that the dlopen() routine is available.
458 d_dlsymun (d_dlsymun.U):
459 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
460 indicates that we need to prepend an underscore to the symbol
461 name before calling dlsym().
463 d_dosuid (d_dosuid.U):
464 This variable conditionally defines the symbol DOSUID, which
465 tells the C program that it should insert setuid emulation code
466 on hosts which have setuid #! scripts disabled.
468 d_drand48proto (d_drand48proto.U):
469 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
470 which indicates to the C program that the system provides
471 a prototype for the drand48() function. Otherwise, it is
472 up to the program to supply one.
475 This variable conditionally defines HAS_DUP2 if dup2() is
476 available to duplicate file descriptors.
478 d_eaccess (d_eaccess.U):
479 This variable conditionally defines the HAS_EACCESS symbol, which
480 indicates to the C program that the eaccess() routine is available.
482 d_endgrent (d_endgrent.U):
483 This variable conditionally defines the HAS_ENDGRENT symbol, which
484 indicates to the C program that the endgrent() routine is available
485 for sequential access of the group database.
487 d_endhent (d_endhent.U):
488 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
489 available to close whatever was being used for host queries.
491 d_endnent (d_endnent.U):
492 This variable conditionally defines HAS_ENDNETENT if endnetent() is
493 available to close whatever was being used for network queries.
495 d_endpent (d_endpent.U):
496 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
497 available to close whatever was being used for protocol queries.
499 d_endpwent (d_endpwent.U):
500 This variable conditionally defines the HAS_ENDPWENT symbol, which
501 indicates to the C program that the endpwent() routine is available
502 for sequential access of the passwd database.
504 d_endsent (d_endsent.U):
505 This variable conditionally defines HAS_ENDSERVENT if endservent() is
506 available to close whatever was being used for service queries.
508 d_endspent (d_endspent.U):
509 This variable conditionally defines HAS_ENDSPENT if endspent() is
510 available to finalize the scan of SysV shadow password entries.
512 d_eofnblk (nblock_io.U):
513 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
514 when reading from a non-blocking I/O source.
517 This variable conditionally defines the symbols EUNICE and VAX, which
518 alerts the C program that it must deal with ideosyncracies of VMS.
520 d_fchmod (d_fchmod.U):
521 This variable conditionally defines the HAS_FCHMOD symbol, which
522 indicates to the C program that the fchmod() routine is available
523 to change mode of opened files.
525 d_fchown (d_fchown.U):
526 This variable conditionally defines the HAS_FCHOWN symbol, which
527 indicates to the C program that the fchown() routine is available
528 to change ownership of opened files.
531 This variable conditionally defines the HAS_FCNTL symbol, and indicates
532 whether the fcntl() function exists
534 d_fd_macros (d_fd_set.U):
535 This variable contains the eventual value of the HAS_FD_MACROS symbol,
536 which indicates if your C compiler knows about the macros which
537 manipulate an fd_set.
539 d_fd_set (d_fd_set.U):
540 This variable contains the eventual value of the HAS_FD_SET symbol,
541 which indicates if your C compiler knows about the fd_set typedef.
543 d_fds_bits (d_fd_set.U):
544 This variable contains the eventual value of the HAS_FDS_BITS symbol,
545 which indicates if your fd_set typedef contains the fds_bits member.
546 If you have an fd_set typedef, but the dweebs who installed it did
547 a half-fast job and neglected to provide the macros to manipulate
548 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
550 d_fgetpos (d_fgetpos.U):
551 This variable conditionally defines HAS_FGETPOS if fgetpos() is
552 available to get the file position indicator.
554 d_flexfnam (d_flexfnam.U):
555 This variable conditionally defines the FLEXFILENAMES symbol, which
556 indicates that the system supports filenames longer than 14 characters.
559 This variable conditionally defines HAS_FLOCK if flock() is
560 available to do file locking.
563 This variable conditionally defines the HAS_FORK symbol, which
564 indicates to the C program that the fork() routine is available.
566 d_fpathconf (d_pathconf.U):
567 This variable conditionally defines the HAS_FPATHCONF symbol, which
568 indicates to the C program that the pathconf() routine is available
569 to determine file-system related limits and options associated
570 with a given open file descriptor.
572 d_fpos64_t (d_fpos64_t.U):
573 This symbol will be defined if the C compiler supports fpos64_t.
575 d_fs_data_s (d_fs_data_s.U):
576 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
577 which indicates that the struct fs_data is supported.
579 d_fseeko (d_fseeko.U):
580 This variable conditionally defines the HAS_FSEEKO symbol, which
581 indicates to the C program that the fseeko() routine is available.
583 d_fsetpos (d_fsetpos.U):
584 This variable conditionally defines HAS_FSETPOS if fsetpos() is
585 available to set the file position indicator.
587 d_fstatfs (d_fstatfs.U):
588 This variable conditionally defines the HAS_FSTATFS symbol, which
589 indicates to the C program that the fstatfs() routine is available.
591 d_fstatvfs (d_statvfs.U):
592 This variable conditionally defines the HAS_FSTATVFS symbol, which
593 indicates to the C program that the fstatvfs() routine is available.
595 d_ftello (d_ftello.U):
596 This variable conditionally defines the HAS_FTELLO symbol, which
597 indicates to the C program that the ftello() routine is available.
600 This variable conditionally defines the HAS_FTIME symbol, which indicates
601 that the ftime() routine exists. The ftime() routine is basically
602 a sub-second accuracy clock.
604 d_Gconvert (d_gconvert.U):
605 This variable holds what Gconvert is defined as to convert
606 floating point numbers into strings. It could be 'gconvert'
607 or a more complex macro emulating gconvert with gcvt() or sprintf.
609 d_Gconvert='gconvert((x),(n),(t),(b))'
610 d_Gconvert='gcvt((x),(n),(b))'
611 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
613 d_getcwd (d_getcwd.U):
614 This variable conditionally defines the HAS_GETCWD symbol, which
615 indicates to the C program that the getcwd() routine is available
616 to get the current working directory.
618 d_getfsstat (d_getfsstat.U):
619 This variable conditionally defines the HAS_GETFSSTAT symbol, which
620 indicates to the C program that the getfsstat() routine is available.
622 d_getgrent (d_getgrent.U):
623 This variable conditionally defines the HAS_GETGRENT symbol, which
624 indicates to the C program that the getgrent() routine is available
625 for sequential access of the group database.
627 d_getgrps (d_getgrps.U):
628 This variable conditionally defines the HAS_GETGROUPS symbol, which
629 indicates to the C program that the getgroups() routine is available
630 to get the list of process groups.
632 d_gethbyaddr (d_gethbyad.U):
633 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
634 indicates to the C program that the gethostbyaddr() routine is available
635 to look up hosts by their IP addresses.
637 d_gethbyname (d_gethbynm.U):
638 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
639 indicates to the C program that the gethostbyname() routine is available
640 to look up host names in some data base or other.
642 d_gethent (d_gethent.U):
643 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
644 available to look up host names in some data base or another.
646 d_gethname (d_gethname.U):
647 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
648 indicates to the C program that the gethostname() routine may be
649 used to derive the host name.
651 d_gethostprotos (d_gethostprotos.U):
652 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
653 which indicates to the C program that <netdb.h> supplies
654 prototypes for the various gethost*() functions.
655 See also netdbtype.U for probing for various netdb types.
657 d_getlogin (d_getlogin.U):
658 This variable conditionally defines the HAS_GETLOGIN symbol, which
659 indicates to the C program that the getlogin() routine is available
660 to get the login name.
662 d_getmnt (d_getmnt.U):
663 This variable conditionally defines the HAS_GETMNT symbol, which
664 indicates to the C program that the getmnt() routine is available
665 to retrieve one or more mount info blocks by filename.
667 d_getmntent (d_getmntent.U):
668 This variable conditionally defines the HAS_GETMNTENT symbol, which
669 indicates to the C program that the getmntent() routine is available
670 to iterate through mounted files to get their mount info.
672 d_getnbyaddr (d_getnbyad.U):
673 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
674 indicates to the C program that the getnetbyaddr() routine is available
675 to look up networks by their IP addresses.
677 d_getnbyname (d_getnbynm.U):
678 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
679 indicates to the C program that the getnetbyname() routine is available
680 to look up networks by their names.
682 d_getnent (d_getnent.U):
683 This variable conditionally defines HAS_GETNETENT if getnetent() is
684 available to look up network names in some data base or another.
686 d_getnetprotos (d_getnetprotos.U):
687 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
688 which indicates to the C program that <netdb.h> supplies
689 prototypes for the various getnet*() functions.
690 See also netdbtype.U for probing for various netdb types.
692 d_getpbyname (d_getprotby.U):
693 This variable conditionally defines the HAS_GETPROTOBYNAME
694 symbol, which indicates to the C program that the
695 getprotobyname() routine is available to look up protocols
698 d_getpbynumber (d_getprotby.U):
699 This variable conditionally defines the HAS_GETPROTOBYNUMBER
700 symbol, which indicates to the C program that the
701 getprotobynumber() routine is available to look up protocols
704 d_getpent (d_getpent.U):
705 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
706 available to look up protocols in some data base or another.
708 d_getpgid (d_getpgid.U):
709 This variable conditionally defines the HAS_GETPGID symbol, which
710 indicates to the C program that the getpgid(pid) function
711 is available to get the process group id.
713 d_getpgrp2 (d_getpgrp2.U):
714 This variable conditionally defines the HAS_GETPGRP2 symbol, which
715 indicates to the C program that the getpgrp2() (as in DG/UX) routine
716 is available to get the current process group.
718 d_getpgrp (d_getpgrp.U):
719 This variable conditionally defines HAS_GETPGRP if getpgrp() is
720 available to get the current process group.
722 d_getppid (d_getppid.U):
723 This variable conditionally defines the HAS_GETPPID symbol, which
724 indicates to the C program that the getppid() routine is available
725 to get the parent process ID.
727 d_getprior (d_getprior.U):
728 This variable conditionally defines HAS_GETPRIORITY if getpriority()
729 is available to get a process's priority.
731 d_getprotoprotos (d_getprotoprotos.U):
732 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
733 which indicates to the C program that <netdb.h> supplies
734 prototypes for the various getproto*() functions.
735 See also netdbtype.U for probing for various netdb types.
737 d_getpwent (d_getpwent.U):
738 This variable conditionally defines the HAS_GETPWENT symbol, which
739 indicates to the C program that the getpwent() routine is available
740 for sequential access of the passwd database.
742 d_getsbyname (d_getsrvby.U):
743 This variable conditionally defines the HAS_GETSERVBYNAME
744 symbol, which indicates to the C program that the
745 getservbyname() routine is available to look up services
748 d_getsbyport (d_getsrvby.U):
749 This variable conditionally defines the HAS_GETSERVBYPORT
750 symbol, which indicates to the C program that the
751 getservbyport() routine is available to look up services
754 d_getsent (d_getsent.U):
755 This variable conditionally defines HAS_GETSERVENT if getservent() is
756 available to look up network services in some data base or another.
758 d_getservprotos (d_getservprotos.U):
759 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
760 which indicates to the C program that <netdb.h> supplies
761 prototypes for the various getserv*() functions.
762 See also netdbtype.U for probing for various netdb types.
764 d_getspent (d_getspent.U):
765 This variable conditionally defines HAS_GETSPENT if getspent() is
766 available to retrieve SysV shadow password entries sequentially.
768 d_getspnam (d_getspnam.U):
769 This variable conditionally defines HAS_GETSPNAM if getspnam() is
770 available to retrieve SysV shadow password entries by name.
772 d_gettimeod (d_ftime.U):
773 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
774 indicates that the gettimeofday() system call exists (to obtain a
775 sub-second accuracy clock). You should probably include <sys/resource.h>.
777 d_gnulibc (d_gnulibc.U):
778 Defined if we're dealing with the GNU C Library.
780 d_grpasswd (i_grp.U):
781 This variable conditionally defines GRPASSWD, which indicates
782 that struct group in <grp.h> contains gr_passwd.
784 d_hasmntopt (d_hasmntopt.U):
785 This variable conditionally defines the HAS_HASMNTOPT symbol, which
786 indicates to the C program that the hasmntopt() routine is available
787 to query the mount options of file systems.
790 This variable conditionally defines HAS_HTONL if htonl() and its
791 friends are available to do network order byte swapping.
794 This variable conditionally defines the HAS_ICONV symbol, which
795 indicates to the C program that the iconv() routine is available.
797 d_index (d_strchr.U):
798 This variable conditionally defines HAS_INDEX if index() and
799 rindex() are available for string searching.
801 d_inetaton (d_inetaton.U):
802 This variable conditionally defines the HAS_INET_ATON symbol, which
803 indicates to the C program that the inet_aton() function is available
804 to parse IP address "dotted-quad" strings.
806 d_int64_t (d_int64_t.U):
807 This symbol will be defined if the C compiler supports int64_t.
809 d_isascii (d_isascii.U):
810 This variable conditionally defines the HAS_ISASCII constant,
811 which indicates to the C program that isascii() is available.
813 d_killpg (d_killpg.U):
814 This variable conditionally defines the HAS_KILLPG symbol, which
815 indicates to the C program that the killpg() routine is available
816 to kill process groups.
818 d_lchown (d_lchown.U):
819 This variable conditionally defines the HAS_LCHOWN symbol, which
820 indicates to the C program that the lchown() routine is available
821 to operate on a symbolic link (instead of following the link).
823 d_ldbl_dig (d_ldbl_dig.U):
824 This variable conditionally defines d_ldbl_dig if this system's
825 header files provide LDBL_DIG, which is the number of significant
826 digits in a long double precision number.
829 This variable conditionally defines HAS_LINK if link() is
830 available to create hard links.
832 d_locconv (d_locconv.U):
833 This variable conditionally defines HAS_LOCALECONV if localeconv() is
834 available for numeric and monetary formatting conventions.
837 This variable conditionally defines HAS_LOCKF if lockf() is
838 available to do file locking.
840 d_longdbl (d_longdbl.U):
841 This variable conditionally defines HAS_LONG_DOUBLE if
842 the long double type is supported.
844 d_longlong (d_longlong.U):
845 This variable conditionally defines HAS_LONG_LONG if
846 the long long type is supported.
848 d_lseekproto (d_lseekproto.U):
849 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
850 which indicates to the C program that the system provides
851 a prototype for the lseek() function. Otherwise, it is
852 up to the program to supply one.
855 This variable conditionally defines HAS_LSTAT if lstat() is
856 available to do file stats on symbolic links.
858 d_madvise (d_madvise.U):
859 This variable conditionally defines HAS_MADVISE if madvise() is
860 available to map a file into memory.
863 This variable conditionally defines the HAS_MBLEN symbol, which
864 indicates to the C program that the mblen() routine is available
865 to find the number of bytes in a multibye character.
867 d_mbstowcs (d_mbstowcs.U):
868 This variable conditionally defines the HAS_MBSTOWCS symbol, which
869 indicates to the C program that the mbstowcs() routine is available
870 to convert a multibyte string into a wide character string.
872 d_mbtowc (d_mbtowc.U):
873 This variable conditionally defines the HAS_MBTOWC symbol, which
874 indicates to the C program that the mbtowc() routine is available
875 to convert multibyte to a wide character.
877 d_memchr (d_memchr.U):
878 This variable conditionally defines the HAS_MEMCHR symbol, which
879 indicates to the C program that the memchr() routine is available
880 to locate characters within a C string.
882 d_memcmp (d_memcmp.U):
883 This variable conditionally defines the HAS_MEMCMP symbol, which
884 indicates to the C program that the memcmp() routine is available
885 to compare blocks of memory.
887 d_memcpy (d_memcpy.U):
888 This variable conditionally defines the HAS_MEMCPY symbol, which
889 indicates to the C program that the memcpy() routine is available
890 to copy blocks of memory.
892 d_memmove (d_memmove.U):
893 This variable conditionally defines the HAS_MEMMOVE symbol, which
894 indicates to the C program that the memmove() routine is available
895 to copy potentatially overlapping blocks of memory.
897 d_memset (d_memset.U):
898 This variable conditionally defines the HAS_MEMSET symbol, which
899 indicates to the C program that the memset() routine is available
900 to set blocks of memory.
903 This variable conditionally defines the HAS_MKDIR symbol, which
904 indicates to the C program that the mkdir() routine is available
905 to create directories..
907 d_mkdtemp (d_mkdtemp.U):
908 This variable conditionally defines the HAS_MKDTEMP symbol, which
909 indicates to the C program that the mkdtemp() routine is available
910 to exclusively create a uniquely named temporary directory.
912 d_mkfifo (d_mkfifo.U):
913 This variable conditionally defines the HAS_MKFIFO symbol, which
914 indicates to the C program that the mkfifo() routine is available.
916 d_mkstemp (d_mkstemp.U):
917 This variable conditionally defines the HAS_MKSTEMP symbol, which
918 indicates to the C program that the mkstemp() routine is available
919 to exclusively create and open a uniquely named temporary file.
921 d_mkstemps (d_mkstemps.U):
922 This variable conditionally defines the HAS_MKSTEMPS symbol, which
923 indicates to the C program that the mkstemps() routine is available
924 to exclusively create and open a uniquely named (with a suffix)
927 d_mktime (d_mktime.U):
928 This variable conditionally defines the HAS_MKTIME symbol, which
929 indicates to the C program that the mktime() routine is available.
932 This variable conditionally defines HAS_MMAP if mmap() is
933 available to map a file into memory.
935 d_mprotect (d_mprotect.U):
936 This variable conditionally defines HAS_MPROTECT if mprotect() is
937 available to modify the access protection of a memory mapped file.
940 This variable conditionally defines the HAS_MSG symbol, which
941 indicates that the entire msg*(2) library is present.
943 d_msg_ctrunc (d_socket.U):
944 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
945 which indicates that the MSG_CTRUNC is available. #ifdef is
946 not enough because it may be an enum, glibc has been known to do this.
948 d_msg_dontroute (d_socket.U):
949 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
950 which indicates that the MSG_DONTROUTE is available. #ifdef is
951 not enough because it may be an enum, glibc has been known to do this.
953 d_msg_oob (d_socket.U):
954 This variable conditionally defines the HAS_MSG_OOB symbol,
955 which indicates that the MSG_OOB is available. #ifdef is
956 not enough because it may be an enum, glibc has been known to do this.
958 d_msg_peek (d_socket.U):
959 This variable conditionally defines the HAS_MSG_PEEK symbol,
960 which indicates that the MSG_PEEK is available. #ifdef is
961 not enough because it may be an enum, glibc has been known to do this.
963 d_msg_proxy (d_socket.U):
964 This variable conditionally defines the HAS_MSG_PROXY symbol,
965 which indicates that the MSG_PROXY is available. #ifdef is
966 not enough because it may be an enum, glibc has been known to do this.
968 d_msgctl (d_msgctl.U):
969 This variable conditionally defines the HAS_MSGCTL symbol, which
970 indicates to the C program that the msgctl() routine is available.
972 d_msgget (d_msgget.U):
973 This variable conditionally defines the HAS_MSGGET symbol, which
974 indicates to the C program that the msgget() routine is available.
976 d_msgrcv (d_msgrcv.U):
977 This variable conditionally defines the HAS_MSGRCV symbol, which
978 indicates to the C program that the msgrcv() routine is available.
980 d_msgsnd (d_msgsnd.U):
981 This variable conditionally defines the HAS_MSGSND symbol, which
982 indicates to the C program that the msgsnd() routine is available.
985 This variable conditionally defines HAS_MSYNC if msync() is
986 available to synchronize a mapped file.
988 d_munmap (d_munmap.U):
989 This variable conditionally defines HAS_MUNMAP if munmap() is
990 available to unmap a region mapped by mmap().
992 d_mymalloc (mallocsrc.U):
993 This variable conditionally defines MYMALLOC in case other parts
994 of the source want to take special action if MYMALLOC is used.
995 This may include different sorts of profiling or error detection.
998 This variable conditionally defines the HAS_NICE symbol, which
999 indicates to the C program that the nice() routine is available.
1001 d_nv_preserves_uv (perlxv.U):
1002 This variable indicates whether a variable of type nvtype
1003 can preserve all the bits a variable of type uvtype.
1005 d_off64_t (d_off64_t.U):
1006 This symbol will be defined if the C compiler supports off64_t.
1008 d_old_pthread_create_joinable (d_pthrattrj.U):
1009 This variable conditionally defines pthread_create_joinable.
1010 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1012 d_oldpthreads (usethreads.U):
1013 This variable conditionally defines the OLD_PTHREADS_API symbol,
1014 and indicates that Perl should be built to use the old
1015 draft POSIX threads API. This is only potentially meaningful if
1018 d_oldsock (d_socket.U):
1019 This variable conditionally defines the OLDSOCKET symbol, which
1020 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1022 d_open3 (d_open3.U):
1023 This variable conditionally defines the HAS_OPEN3 manifest constant,
1024 which indicates to the C program that the 3 argument version of
1025 the open(2) function is available.
1027 d_pathconf (d_pathconf.U):
1028 This variable conditionally defines the HAS_PATHCONF symbol, which
1029 indicates to the C program that the pathconf() routine is available
1030 to determine file-system related limits and options associated
1031 with a given filename.
1033 d_pause (d_pause.U):
1034 This variable conditionally defines the HAS_PAUSE symbol, which
1035 indicates to the C program that the pause() routine is available
1036 to suspend a process until a signal is received.
1038 d_phostname (d_gethname.U):
1039 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1040 contains the shell command which, when fed to popen(), may be
1041 used to derive the host name.
1044 This variable conditionally defines the HAS_PIPE symbol, which
1045 indicates to the C program that the pipe() routine is available
1046 to create an inter-process channel.
1049 This variable conditionally defines the HAS_POLL symbol, which
1050 indicates to the C program that the poll() routine is available
1051 to poll active file descriptors.
1053 d_portable (d_portable.U):
1054 This variable conditionally defines the PORTABLE symbol, which
1055 indicates to the C program that it should not assume that it is
1056 running on the machine it was compiled on.
1058 d_PRId64 (quadfio.U):
1059 This variable conditionally defines the PERL_PRId64 symbol, which
1060 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1062 d_PRIeldbl (longdblfio.U):
1063 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1064 indiciates that stdio has a symbol to print long doubles.
1066 d_PRIEldbl (longdblfio.U):
1067 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1068 indiciates that stdio has a symbol to print long doubles.
1070 d_PRIfldbl (longdblfio.U):
1071 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1072 indiciates that stdio has a symbol to print long doubles.
1074 d_PRIFldbl (longdblfio.U):
1075 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1076 indiciates that stdio has a symbol to print long doubles.
1078 d_PRIgldbl (longdblfio.U):
1079 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1080 indiciates that stdio has a symbol to print long doubles.
1082 d_PRIGldbl (longdblfio.U):
1083 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1084 indiciates that stdio has a symbol to print long doubles.
1086 d_PRIi64 (quadfio.U):
1087 This variable conditionally defines the PERL_PRIi64 symbol, which
1088 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1090 d_PRIo64 (quadfio.U):
1091 This variable conditionally defines the PERL_PRIo64 symbol, which
1092 indiciates that stdio has a symbol to print 64-bit octal numbers.
1094 d_PRIu64 (quadfio.U):
1095 This variable conditionally defines the PERL_PRIu64 symbol, which
1096 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1099 d_PRIx64 (quadfio.U):
1100 This variable conditionally defines the PERL_PRIx64 symbol, which
1101 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1103 d_PRIX64 (quadfio.U):
1104 This variable conditionally defines the PERL_PRIX64 symbol, which
1105 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1107 d_pthread_yield (d_pthread_y.U):
1108 This variable conditionally defines the HAS_PTHREAD_YIELD
1109 symbol if the pthread_yield routine is available to yield
1110 the execution of the current thread.
1113 This variable conditionally defines PWAGE, which indicates
1114 that struct passwd contains pw_age.
1116 d_pwchange (i_pwd.U):
1117 This variable conditionally defines PWCHANGE, which indicates
1118 that struct passwd contains pw_change.
1120 d_pwclass (i_pwd.U):
1121 This variable conditionally defines PWCLASS, which indicates
1122 that struct passwd contains pw_class.
1124 d_pwcomment (i_pwd.U):
1125 This variable conditionally defines PWCOMMENT, which indicates
1126 that struct passwd contains pw_comment.
1128 d_pwexpire (i_pwd.U):
1129 This variable conditionally defines PWEXPIRE, which indicates
1130 that struct passwd contains pw_expire.
1132 d_pwgecos (i_pwd.U):
1133 This variable conditionally defines PWGECOS, which indicates
1134 that struct passwd contains pw_gecos.
1136 d_pwpasswd (i_pwd.U):
1137 This variable conditionally defines PWPASSWD, which indicates
1138 that struct passwd contains pw_passwd.
1140 d_pwquota (i_pwd.U):
1141 This variable conditionally defines PWQUOTA, which indicates
1142 that struct passwd contains pw_quota.
1144 d_qgcvt (d_qgcvt.U):
1145 This variable conditionally defines the HAS_QGCVT symbol, which
1146 indicates to the C program that the qgcvt() routine is available.
1148 d_quad (quadtype.U):
1149 This variable, if defined, tells that there's a 64-bit integer type,
1152 d_readdir (d_readdir.U):
1153 This variable conditionally defines HAS_READDIR if readdir() is
1154 available to read directory entries.
1156 d_readlink (d_readlink.U):
1157 This variable conditionally defines the HAS_READLINK symbol, which
1158 indicates to the C program that the readlink() routine is available
1159 to read the value of a symbolic link.
1161 d_rename (d_rename.U):
1162 This variable conditionally defines the HAS_RENAME symbol, which
1163 indicates to the C program that the rename() routine is available
1166 d_rewinddir (d_readdir.U):
1167 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1170 d_rmdir (d_rmdir.U):
1171 This variable conditionally defines HAS_RMDIR if rmdir() is
1172 available to remove directories.
1174 d_safebcpy (d_safebcpy.U):
1175 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1176 the bcopy() routine can do overlapping copies.
1178 d_safemcpy (d_safemcpy.U):
1179 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1180 the memcpy() routine can do overlapping copies.
1182 d_sanemcmp (d_sanemcmp.U):
1183 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1184 the memcpy() routine is available and can be used to compare relative
1185 magnitudes of chars with their high bits set.
1187 d_sched_yield (d_pthread_y.U):
1188 This variable conditionally defines the HAS_SCHED_YIELD
1189 symbol if the sched_yield routine is available to yield
1190 the execution of the current thread.
1192 d_scm_rights (d_socket.U):
1193 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1194 which indicates that the SCM_RIGHTS is available. #ifdef is
1195 not enough because it may be an enum, glibc has been known to do this.
1197 d_seekdir (d_readdir.U):
1198 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1201 d_select (d_select.U):
1202 This variable conditionally defines HAS_SELECT if select() is
1203 available to select active file descriptors. A <sys/time.h>
1204 inclusion may be necessary for the timeout field.
1207 This variable conditionally defines the HAS_SEM symbol, which
1208 indicates that the entire sem*(2) library is present.
1210 d_semctl (d_semctl.U):
1211 This variable conditionally defines the HAS_SEMCTL symbol, which
1212 indicates to the C program that the semctl() routine is available.
1214 d_semctl_semid_ds (d_union_semun.U):
1215 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1216 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1218 d_semctl_semun (d_union_semun.U):
1219 This variable conditionally defines USE_SEMCTL_SEMUN, which
1220 indicates that union semun is to be used for semctl IPC_STAT.
1222 d_semget (d_semget.U):
1223 This variable conditionally defines the HAS_SEMGET symbol, which
1224 indicates to the C program that the semget() routine is available.
1226 d_semop (d_semop.U):
1227 This variable conditionally defines the HAS_SEMOP symbol, which
1228 indicates to the C program that the semop() routine is available.
1230 d_setegid (d_setegid.U):
1231 This variable conditionally defines the HAS_SETEGID symbol, which
1232 indicates to the C program that the setegid() routine is available
1233 to change the effective gid of the current program.
1235 d_seteuid (d_seteuid.U):
1236 This variable conditionally defines the HAS_SETEUID symbol, which
1237 indicates to the C program that the seteuid() routine is available
1238 to change the effective uid of the current program.
1240 d_setgrent (d_setgrent.U):
1241 This variable conditionally defines the HAS_SETGRENT symbol, which
1242 indicates to the C program that the setgrent() routine is available
1243 for initializing sequential access to the group database.
1245 d_setgrps (d_setgrps.U):
1246 This variable conditionally defines the HAS_SETGROUPS symbol, which
1247 indicates to the C program that the setgroups() routine is available
1248 to set the list of process groups.
1250 d_sethent (d_sethent.U):
1251 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1254 d_setlinebuf (d_setlnbuf.U):
1255 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1256 indicates to the C program that the setlinebuf() routine is available
1257 to change stderr or stdout from block-buffered or unbuffered to a
1260 d_setlocale (d_setlocale.U):
1261 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1262 available to handle locale-specific ctype implementations.
1264 d_setnent (d_setnent.U):
1265 This variable conditionally defines HAS_SETNETENT if setnetent() is
1268 d_setpent (d_setpent.U):
1269 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1272 d_setpgid (d_setpgid.U):
1273 This variable conditionally defines the HAS_SETPGID symbol if the
1274 setpgid(pid, gpid) function is available to set process group ID.
1276 d_setpgrp2 (d_setpgrp2.U):
1277 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1278 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1279 is available to set the current process group.
1281 d_setpgrp (d_setpgrp.U):
1282 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1283 available to set the current process group.
1285 d_setprior (d_setprior.U):
1286 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1287 is available to set a process's priority.
1289 d_setpwent (d_setpwent.U):
1290 This variable conditionally defines the HAS_SETPWENT symbol, which
1291 indicates to the C program that the setpwent() routine is available
1292 for initializing sequential access to the passwd database.
1294 d_setregid (d_setregid.U):
1295 This variable conditionally defines HAS_SETREGID if setregid() is
1296 available to change the real and effective gid of the current
1299 d_setresgid (d_setregid.U):
1300 This variable conditionally defines HAS_SETRESGID if setresgid() is
1301 available to change the real, effective and saved gid of the current
1304 d_setresuid (d_setreuid.U):
1305 This variable conditionally defines HAS_SETREUID if setresuid() is
1306 available to change the real, effective and saved uid of the current
1309 d_setreuid (d_setreuid.U):
1310 This variable conditionally defines HAS_SETREUID if setreuid() is
1311 available to change the real and effective uid of the current
1314 d_setrgid (d_setrgid.U):
1315 This variable conditionally defines the HAS_SETRGID symbol, which
1316 indicates to the C program that the setrgid() routine is available
1317 to change the real gid of the current program.
1319 d_setruid (d_setruid.U):
1320 This variable conditionally defines the HAS_SETRUID symbol, which
1321 indicates to the C program that the setruid() routine is available
1322 to change the real uid of the current program.
1324 d_setsent (d_setsent.U):
1325 This variable conditionally defines HAS_SETSERVENT if setservent() is
1328 d_setsid (d_setsid.U):
1329 This variable conditionally defines HAS_SETSID if setsid() is
1330 available to set the process group ID.
1332 d_setspent (d_setspent.U):
1333 This variable conditionally defines HAS_SETSPENT if setspent() is
1334 available to initialize the scan of SysV shadow password entries.
1336 d_setvbuf (d_setvbuf.U):
1337 This variable conditionally defines the HAS_SETVBUF symbol, which
1338 indicates to the C program that the setvbuf() routine is available
1339 to change buffering on an open stdio stream.
1342 This variable conditionally defines the USE_SFIO symbol,
1343 and indicates whether sfio is available (and should be used).
1346 This variable conditionally defines the HAS_SHM symbol, which
1347 indicates that the entire shm*(2) library is present.
1349 d_shmat (d_shmat.U):
1350 This variable conditionally defines the HAS_SHMAT symbol, which
1351 indicates to the C program that the shmat() routine is available.
1353 d_shmatprototype (d_shmat.U):
1354 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1355 symbol, which indicates that sys/shm.h has a prototype for
1358 d_shmctl (d_shmctl.U):
1359 This variable conditionally defines the HAS_SHMCTL symbol, which
1360 indicates to the C program that the shmctl() routine is available.
1362 d_shmdt (d_shmdt.U):
1363 This variable conditionally defines the HAS_SHMDT symbol, which
1364 indicates to the C program that the shmdt() routine is available.
1366 d_shmget (d_shmget.U):
1367 This variable conditionally defines the HAS_SHMGET symbol, which
1368 indicates to the C program that the shmget() routine is available.
1370 d_sigaction (d_sigaction.U):
1371 This variable conditionally defines the HAS_SIGACTION symbol, which
1372 indicates that the Vr4 sigaction() routine is available.
1374 d_sigsetjmp (d_sigsetjmp.U):
1375 This variable conditionally defines the HAS_SIGSETJMP symbol,
1376 which indicates that the sigsetjmp() routine is available to
1377 call setjmp() and optionally save the process's signal mask.
1379 d_socket (d_socket.U):
1380 This variable conditionally defines HAS_SOCKET, which indicates
1381 that the BSD socket interface is supported.
1383 d_socklen_t (d_socklen_t.U):
1384 This symbol will be defined if the C compiler supports socklen_t.
1386 d_sockpair (d_socket.U):
1387 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1388 indicates that the BSD socketpair() is supported.
1390 d_sqrtl (d_sqrtl.U):
1391 This variable conditionally defines the HAS_SQRTL symbol, which
1392 indicates to the C program that the sqrtl() routine is available.
1394 d_statblks (d_statblks.U):
1395 This variable conditionally defines USE_STAT_BLOCKS
1396 if this system has a stat structure declaring
1397 st_blksize and st_blocks.
1399 d_statfs_f_flags (d_statfs_f_flags.U):
1400 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1401 symbol, which indicates to struct statfs from has f_flags member.
1402 This kind of struct statfs is coming from sys/mount.h (BSD),
1403 not from sys/statfs.h (SYSV).
1405 d_statfs_s (d_statfs_s.U):
1406 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1407 which indicates that the struct statfs is supported.
1409 d_statvfs (d_statvfs.U):
1410 This variable conditionally defines the HAS_STATVFS symbol, which
1411 indicates to the C program that the statvfs() routine is available.
1413 d_stdio_cnt_lval (d_stdstdio.U):
1414 This variable conditionally defines STDIO_CNT_LVALUE if the
1415 FILE_cnt macro can be used as an lvalue.
1417 d_stdio_ptr_lval (d_stdstdio.U):
1418 This variable conditionally defines STDIO_PTR_LVALUE if the
1419 FILE_ptr macro can be used as an lvalue.
1421 d_stdio_stream_array (stdio_streams.U):
1422 This variable tells whether there is an array holding
1425 d_stdiobase (d_stdstdio.U):
1426 This variable conditionally defines USE_STDIO_BASE if this system
1427 has a FILE structure declaring a usable _base field (or equivalent)
1430 d_stdstdio (d_stdstdio.U):
1431 This variable conditionally defines USE_STDIO_PTR if this system
1432 has a FILE structure declaring usable _ptr and _cnt fields (or
1433 equivalent) in stdio.h.
1435 d_strchr (d_strchr.U):
1436 This variable conditionally defines HAS_STRCHR if strchr() and
1437 strrchr() are available for string searching.
1439 d_strcoll (d_strcoll.U):
1440 This variable conditionally defines HAS_STRCOLL if strcoll() is
1441 available to compare strings using collating information.
1443 d_strctcpy (d_strctcpy.U):
1444 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1445 indicates to the C program that this C compiler knows how to copy
1448 d_strerrm (d_strerror.U):
1449 This variable holds what Strerrr is defined as to translate an error
1450 code condition into an error message string. It could be 'strerror'
1451 or a more complex macro emulating strrror with sys_errlist[], or the
1452 "unknown" string when both strerror and sys_errlist are missing.
1454 d_strerror (d_strerror.U):
1455 This variable conditionally defines HAS_STRERROR if strerror() is
1456 available to translate error numbers to strings.
1458 d_strtod (d_strtod.U):
1459 This variable conditionally defines the HAS_STRTOD symbol, which
1460 indicates to the C program that the strtod() routine is available
1461 to provide better numeric string conversion than atof().
1463 d_strtol (d_strtol.U):
1464 This variable conditionally defines the HAS_STRTOL symbol, which
1465 indicates to the C program that the strtol() routine is available
1466 to provide better numeric string conversion than atoi() and friends.
1468 d_strtold (d_strtold.U):
1469 This variable conditionally defines the HAS_STRTOLD symbol, which
1470 indicates to the C program that the strtold() routine is available.
1472 d_strtoll (d_strtoll.U):
1473 This variable conditionally defines the HAS_STRTOLL symbol, which
1474 indicates to the C program that the strtoll() routine is available.
1476 d_strtoul (d_strtoul.U):
1477 This variable conditionally defines the HAS_STRTOUL symbol, which
1478 indicates to the C program that the strtoul() routine is available
1479 to provide conversion of strings to unsigned long.
1481 d_strtoull (d_strtoull.U):
1482 This variable conditionally defines the HAS_STRTOULL symbol, which
1483 indicates to the C program that the strtoull() routine is available.
1485 d_strtouq (d_strtouq.U):
1486 This variable conditionally defines the HAS_STRTOUQ symbol, which
1487 indicates to the C program that the strtouq() routine is available.
1489 d_strxfrm (d_strxfrm.U):
1490 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1491 available to transform strings.
1493 d_suidsafe (d_dosuid.U):
1494 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1495 if setuid scripts can be secure. This test looks in /dev/fd/.
1497 d_symlink (d_symlink.U):
1498 This variable conditionally defines the HAS_SYMLINK symbol, which
1499 indicates to the C program that the symlink() routine is available
1500 to create symbolic links.
1502 d_syscall (d_syscall.U):
1503 This variable conditionally defines HAS_SYSCALL if syscall() is
1504 available call arbitrary system calls.
1506 d_sysconf (d_sysconf.U):
1507 This variable conditionally defines the HAS_SYSCONF symbol, which
1508 indicates to the C program that the sysconf() routine is available
1509 to determine system related limits and options.
1511 d_sysernlst (d_strerror.U):
1512 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1513 is available to translate error numbers to the symbolic name.
1515 d_syserrlst (d_strerror.U):
1516 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1517 available to translate error numbers to strings.
1519 d_system (d_system.U):
1520 This variable conditionally defines HAS_SYSTEM if system() is
1521 available to issue a shell command.
1523 d_tcgetpgrp (d_tcgtpgrp.U):
1524 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1525 indicates to the C program that the tcgetpgrp() routine is available.
1526 to get foreground process group ID.
1528 d_tcsetpgrp (d_tcstpgrp.U):
1529 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1530 indicates to the C program that the tcsetpgrp() routine is available
1531 to set foreground process group ID.
1533 d_telldir (d_readdir.U):
1534 This variable conditionally defines HAS_TELLDIR if telldir() is
1537 d_telldirproto (d_telldirproto.U):
1538 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1539 which indicates to the C program that the system provides
1540 a prototype for the telldir() function. Otherwise, it is
1541 up to the program to supply one.
1544 This variable conditionally defines the HAS_TIME symbol, which indicates
1545 that the time() routine exists. The time() routine is normaly
1546 provided on UNIX systems.
1548 d_times (d_times.U):
1549 This variable conditionally defines the HAS_TIMES symbol, which indicates
1550 that the times() routine exists. The times() routine is normaly
1551 provided on UNIX systems. You may have to include <sys/times.h>.
1553 d_truncate (d_truncate.U):
1554 This variable conditionally defines HAS_TRUNCATE if truncate() is
1555 available to truncate files.
1557 d_tzname (d_tzname.U):
1558 This variable conditionally defines HAS_TZNAME if tzname[] is
1559 available to access timezone names.
1561 d_umask (d_umask.U):
1562 This variable conditionally defines the HAS_UMASK symbol, which
1563 indicates to the C program that the umask() routine is available.
1564 to set and get the value of the file creation mask.
1566 d_uname (d_gethname.U):
1567 This variable conditionally defines the HAS_UNAME symbol, which
1568 indicates to the C program that the uname() routine may be
1569 used to derive the host name.
1571 d_union_semun (d_union_semun.U):
1572 This variable conditionally defines HAS_UNION_SEMUN if the
1573 union semun is defined by including <sys/sem.h>.
1575 d_ustat (d_ustat.U):
1576 This variable conditionally defines HAS_USTAT if ustat() is
1577 available to query file system statistics by dev_t.
1579 d_vendorarch (vendorarch.U):
1580 This variable conditionally defined PERL_VENDORARCH.
1582 d_vendorbin (vendorbin.U):
1583 This variable conditionally defines PERL_VENDORBIN.
1585 d_vendorlib (vendorlib.U):
1586 This variable conditionally defines PERL_VENDORLIB.
1588 d_vfork (d_vfork.U):
1589 This variable conditionally defines the HAS_VFORK symbol, which
1590 indicates the vfork() routine is available.
1592 d_void_closedir (d_closedir.U):
1593 This variable conditionally defines VOID_CLOSEDIR if closedir()
1594 does not return a value.
1596 d_voidsig (d_voidsig.U):
1597 This variable conditionally defines VOIDSIG if this system
1598 declares "void (*signal(...))()" in signal.h. The old way was to
1599 declare it as "int (*signal(...))()".
1601 d_voidtty (i_sysioctl.U):
1602 This variable conditionally defines USE_IOCNOTTY to indicate that the
1603 ioctl() call with TIOCNOTTY should be used to void tty association.
1604 Otherwise (on USG probably), it is enough to close the standard file
1605 decriptors and do a setpgrp().
1607 d_volatile (d_volatile.U):
1608 This variable conditionally defines the HASVOLATILE symbol, which
1609 indicates to the C program that this C compiler knows about the
1610 volatile declaration.
1612 d_vprintf (d_vprintf.U):
1613 This variable conditionally defines the HAS_VPRINTF symbol, which
1614 indicates to the C program that the vprintf() routine is available
1615 to printf with a pointer to an argument list.
1617 d_wait4 (d_wait4.U):
1618 This variable conditionally defines the HAS_WAIT4 symbol, which
1619 indicates the wait4() routine is available.
1621 d_waitpid (d_waitpid.U):
1622 This variable conditionally defines HAS_WAITPID if waitpid() is
1623 available to wait for child process.
1625 d_wcstombs (d_wcstombs.U):
1626 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1627 indicates to the C program that the wcstombs() routine is available
1628 to convert wide character strings to multibyte strings.
1630 d_wctomb (d_wctomb.U):
1631 This variable conditionally defines the HAS_WCTOMB symbol, which
1632 indicates to the C program that the wctomb() routine is available
1633 to convert a wide character to a multibyte.
1636 This variable conditionally defines the symbol XENIX, which alerts
1637 the C program that it runs under Xenix.
1640 This variable is used internally by Configure to determine the
1641 full pathname (if any) of the date program. After Configure runs,
1642 the value is reset to a plain "date" and is not useful.
1644 db_hashtype (i_db.U):
1645 This variable contains the type of the hash structure element
1646 in the <db.h> header file. In older versions of DB, it was
1647 int, while in newer ones it is u_int32_t.
1649 db_prefixtype (i_db.U):
1650 This variable contains the type of the prefix structure element
1651 in the <db.h> header file. In older versions of DB, it was
1652 int, while in newer ones it is size_t.
1654 defvoidused (voidflags.U):
1655 This variable contains the default value of the VOIDUSED symbol (15).
1657 direntrytype (i_dirent.U):
1658 This symbol is set to 'struct direct' or 'struct dirent' depending on
1659 whether dirent is available or not. You should use this pseudo type to
1660 portably declare your directory entries.
1663 This variable contains the extension that is to be used for the
1664 dynamically loaded modules that perl generaties.
1667 This variable contains the name of the dynamic loading file that
1668 will be used with the package.
1670 doublesize (doublesize.U):
1671 This variable contains the value of the DOUBLESIZE symbol, which
1672 indicates to the C program how many bytes there are in a double.
1674 drand01 (randfunc.U):
1675 Indicates the macro to be used to generate normalized
1676 random numbers. Uses randfunc, often divided by
1677 (double) (((unsigned long) 1 << randbits)) in order to
1678 normalize the result.
1679 In C programs, the macro 'Drand01' is mapped to drand01.
1681 dynamic_ext (Extensions.U):
1682 This variable holds a list of XS extension files we want to
1683 link dynamically into the package. It is used by Makefile.
1685 eagain (nblock_io.U):
1686 This variable bears the symbolic errno code set by read() when no
1687 data is present on the file and non-blocking I/O was enabled (otherwise,
1688 read() blocks naturally).
1691 This variable conditionally defines EBCDIC if this
1692 system uses EBCDIC encoding. Among other things, this
1693 means that the character ranges are not contiguous.
1697 This variable is used internally by Configure to determine the
1698 full pathname (if any) of the echo program. After Configure runs,
1699 the value is reset to a plain "echo" and is not useful.
1702 This variable is used internally by Configure to determine the
1703 full pathname (if any) of the egrep program. After Configure runs,
1704 the value is reset to a plain "egrep" and is not useful.
1707 This variable is defined but not used by Configure.
1708 The value is a plain '' and is not useful.
1711 When running under Eunice this variable contains a command which will
1712 convert a shell script to the proper form of text file for it to be
1713 executable by the shell. On other systems it is a no-op.
1716 This is an old synonym for _exe.
1719 This variable is used internally by Configure to determine the
1720 full pathname (if any) of the expr program. After Configure runs,
1721 the value is reset to a plain "expr" and is not useful.
1723 extensions (Extensions.U):
1724 This variable holds a list of all extension files (both XS and
1725 non-xs linked into the package. It is propagated to Config.pm
1726 and is typically used to test whether a particular extesion
1729 fflushall (fflushall.U):
1730 This symbol, if defined, tells that to flush
1731 all pending stdio output one must loop through all
1732 the stdio file handles stored in an array and fflush them.
1733 Note that if fflushNULL is defined, fflushall will not
1734 even be probed for and will be left undefined.
1736 fflushNULL (fflushall.U):
1737 This symbol, if defined, tells that fflush(NULL) does flush
1738 all pending stdio output.
1741 This variable is defined but not used by Configure.
1742 The value is a plain '' and is not useful.
1744 firstmakefile (Unix.U):
1745 This variable defines the first file searched by make. On unix,
1746 it is makefile (then Makefile). On case-insensitive systems,
1747 it might be something else. This is only used to deal with
1748 convoluted make depend tricks.
1751 This variable is defined but not used by Configure.
1752 The value is a plain '' and is not useful.
1754 fpossize (fpossize.U):
1755 This variable contains the size of a fpostype in bytes.
1757 fpostype (fpostype.U):
1758 This variable defines Fpos_t to be something like fpos_t, long,
1759 uint, or whatever type is used to declare file positions in libc.
1761 freetype (mallocsrc.U):
1762 This variable contains the return type of free(). It is usually
1763 void, but occasionally int.
1766 This variable contains the full pathname to 'ar', whether or
1767 not the user has specified 'portability'. This is only used
1771 This variable contains the full pathname to 'csh', whether or
1772 not the user has specified 'portability'. This is only used
1773 in the compiled C program, and we assume that all systems which
1774 can share this executable will have the same full pathname to
1777 full_sed (Loc_sed.U):
1778 This variable contains the full pathname to 'sed', whether or
1779 not the user has specified 'portability'. This is only used
1780 in the compiled C program, and we assume that all systems which
1781 can share this executable will have the same full pathname to
1785 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1786 indicate whether the compiler is version 1 or 2. This is used in
1787 setting some of the default cflags. It is set to '' if not gcc.
1790 This variable contains the format string used for printing a Gid_t.
1792 gidsign (gidsign.U):
1793 This variable contains the signedness of a gidtype.
1794 1 for unsigned, -1 for signed.
1796 gidsize (gidsize.U):
1797 This variable contains the size of a gidtype in bytes.
1799 gidtype (gidtype.U):
1800 This variable defines Gid_t to be something like gid_t, int,
1801 ushort, or whatever type is used to declare the return type
1802 of getgid(). Typically, it is the type of group ids in the kernel.
1805 This variable holds the general path (space-separated) used to
1806 find libraries. It may contain directories that do not exist on
1807 this platform, libpth is the cleaned-up version.
1810 This variable is used internally by Configure to determine the
1811 full pathname (if any) of the grep program. After Configure runs,
1812 the value is reset to a plain "grep" and is not useful.
1815 This variable contains a command that produces the text of the
1816 /etc/group file. This is normally "cat /etc/group", but can be
1817 "ypcat group" when NIS is used.
1818 On some systems, such as os390, there may be no equivalent
1819 command, in which case this variable is unset.
1821 groupstype (groupstype.U):
1822 This variable defines Groups_t to be something like gid_t, int,
1823 ushort, or whatever type is used for the second argument to
1824 getgroups() and setgroups(). Usually, this is the same as
1825 gidtype (gid_t), but sometimes it isn't.
1828 This variable is used internally by Configure to determine the
1829 full pathname (if any) of the gzip program. After Configure runs,
1830 the value is reset to a plain "gzip" and is not useful.
1832 h_fcntl (h_fcntl.U):
1833 This is variable gets set in various places to tell i_fcntl that
1834 <fcntl.h> should be included.
1836 h_sysfile (h_sysfile.U):
1837 This is variable gets set in various places to tell i_sys_file that
1838 <sys/file.h> should be included.
1841 Gives the type of hints used for previous answers. May be one of
1842 "default", "recommended" or "previous".
1845 This variable contains a command that produces the text of the
1846 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1847 "ypcat hosts" when NIS is used.
1848 On some systems, such as os390, there may be no equivalent
1849 command, in which case this variable is unset.
1852 This variable contains a flag which will tell the C compiler and loader
1853 to produce a program running with a huge memory model. If the
1854 huge model is not supported, contains the flag to produce large
1855 model programs. It is up to the Makefile to use this.
1858 This variable is the size of an I16 in bytes.
1861 This variable contains the C type used for Perl's I16.
1864 This variable is the size of an I32 in bytes.
1867 This variable contains the C type used for Perl's I32.
1870 This variable is the size of an I64 in bytes.
1873 This variable contains the C type used for Perl's I64.
1876 This variable is the size of an I8 in bytes.
1879 This variable contains the C type used for Perl's I8.
1881 i_arpainet (i_arpainet.U):
1882 This variable conditionally defines the I_ARPA_INET symbol,
1883 and indicates whether a C program should include <arpa/inet.h>.
1885 i_bsdioctl (i_sysioctl.U):
1886 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1887 indicates to the C program that <sys/bsdioctl.h> exists and should
1891 This variable conditionally defines the I_DB symbol, and indicates
1892 whether a C program may include Berkeley's DB include file <db.h>.
1895 This variable conditionally defines the I_DBM symbol, which
1896 indicates to the C program that <dbm.h> exists and should
1899 i_dirent (i_dirent.U):
1900 This variable conditionally defines I_DIRENT, which indicates
1901 to the C program that it should include <dirent.h>.
1904 This variable conditionally defines the I_DLD symbol, which
1905 indicates to the C program that <dld.h> (GNU dynamic loading)
1906 exists and should be included.
1908 i_dlfcn (i_dlfcn.U):
1909 This variable conditionally defines the I_DLFCN symbol, which
1910 indicates to the C program that <dlfcn.h> exists and should
1913 i_fcntl (i_fcntl.U):
1914 This variable controls the value of I_FCNTL (which tells
1915 the C program to include <fcntl.h>).
1917 i_float (i_float.U):
1918 This variable conditionally defines the I_FLOAT symbol, and indicates
1919 whether a C program may include <float.h> to get symbols like DBL_MAX
1920 or DBL_MIN, i.e. machine dependent floating point values.
1923 This variable conditionally defines the I_GDBM symbol, which
1924 indicates to the C program that <gdbm.h> exists and should
1928 This variable conditionally defines the I_GRP symbol, and indicates
1929 whether a C program should include <grp.h>.
1931 i_iconv (i_iconv.U):
1932 This variable conditionally defines the I_ICONV symbol, and indicates
1933 whether a C program should include <iconv.h>.
1935 i_ieeefp (i_ieeefp.U):
1936 This variable conditionally defines the I_IEEEFP symbol, and indicates
1937 whether a C program should include <ieeefp.h>.
1939 i_inttypes (i_inttypes.U):
1940 This variable conditionally defines the I_INTTYPES symbol,
1941 and indicates whether a C program should include <inttypes.h>.
1943 i_limits (i_limits.U):
1944 This variable conditionally defines the I_LIMITS symbol, and indicates
1945 whether a C program may include <limits.h> to get symbols like WORD_BIT
1948 i_locale (i_locale.U):
1949 This variable conditionally defines the I_LOCALE symbol,
1950 and indicates whether a C program should include <locale.h>.
1952 i_machcthr (i_machcthr.U):
1953 This variable conditionally defines the I_MACH_CTHREADS symbol,
1954 and indicates whether a C program should include <mach/cthreads.h>.
1956 i_malloc (i_malloc.U):
1957 This variable conditionally defines the I_MALLOC symbol, and indicates
1958 whether a C program should include <malloc.h>.
1961 This variable conditionally defines the I_MATH symbol, and indicates
1962 whether a C program may include <math.h>.
1964 i_memory (i_memory.U):
1965 This variable conditionally defines the I_MEMORY symbol, and indicates
1966 whether a C program should include <memory.h>.
1968 i_mntent (i_mntent.U):
1969 This variable conditionally defines the I_MNTENT symbol, and indicates
1970 whether a C program should include <mntent.h>.
1973 This variable conditionally defines the I_NDBM symbol, which
1974 indicates to the C program that <ndbm.h> exists and should
1977 i_netdb (i_netdb.U):
1978 This variable conditionally defines the I_NETDB symbol, and indicates
1979 whether a C program should include <netdb.h>.
1981 i_neterrno (i_neterrno.U):
1982 This variable conditionally defines the I_NET_ERRNO symbol, which
1983 indicates to the C program that <net/errno.h> exists and should
1986 i_netinettcp (i_netinettcp.U):
1987 This variable conditionally defines the I_NETINET_TCP symbol,
1988 and indicates whether a C program should include <netinet/tcp.h>.
1991 This variable conditionally defines I_NETINET_IN, which indicates
1992 to the C program that it should include <netinet/in.h>. Otherwise,
1993 you may try <sys/in.h>.
1996 This variable conditionally defines the I_POLL symbol, and indicates
1997 whether a C program should include <poll.h>.
1999 i_pthread (i_pthread.U):
2000 This variable conditionally defines the I_PTHREAD symbol,
2001 and indicates whether a C program should include <pthread.h>.
2004 This variable conditionally defines I_PWD, which indicates
2005 to the C program that it should include <pwd.h>.
2007 i_rpcsvcdbm (i_dbm.U):
2008 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2009 indicates to the C program that <rpcsvc/dbm.h> exists and should
2010 be included. Some System V systems might need this instead of <dbm.h>.
2013 This variable conditionally defines the I_SFIO symbol,
2014 and indicates whether a C program should include <sfio.h>.
2016 i_sgtty (i_termio.U):
2017 This variable conditionally defines the I_SGTTY symbol, which
2018 indicates to the C program that it should include <sgtty.h> rather
2021 i_shadow (i_shadow.U):
2022 This variable conditionally defines the I_SHADOW symbol, and indicates
2023 whether a C program should include <shadow.h>.
2025 i_socks (i_socks.U):
2026 This variable conditionally defines the I_SOCKS symbol, and indicates
2027 whether a C program should include <socks.h>.
2029 i_stdarg (i_varhdr.U):
2030 This variable conditionally defines the I_STDARG symbol, which
2031 indicates to the C program that <stdarg.h> exists and should
2034 i_stddef (i_stddef.U):
2035 This variable conditionally defines the I_STDDEF symbol, which
2036 indicates to the C program that <stddef.h> exists and should
2039 i_stdlib (i_stdlib.U):
2040 This variable conditionally defines the I_STDLIB symbol, which
2041 indicates to the C program that <stdlib.h> exists and should
2044 i_string (i_string.U):
2045 This variable conditionally defines the I_STRING symbol, which
2046 indicates that <string.h> should be included rather than <strings.h>.
2048 i_sunmath (i_sunmath.U):
2049 This variable conditionally defines the I_SUNMATH symbol, and indicates
2050 whether a C program should include <sunmath.h>.
2052 i_sysaccess (i_sysaccess.U):
2053 This variable conditionally defines the I_SYS_ACCESS symbol,
2054 and indicates whether a C program should include <sys/access.h>.
2056 i_sysdir (i_sysdir.U):
2057 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2058 whether a C program should include <sys/dir.h>.
2060 i_sysfile (i_sysfile.U):
2061 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2062 whether a C program should include <sys/file.h> to get R_OK and friends.
2064 i_sysfilio (i_sysioctl.U):
2065 This variable conditionally defines the I_SYS_FILIO symbol, which
2066 indicates to the C program that <sys/filio.h> exists and should
2067 be included in preference to <sys/ioctl.h>.
2070 This variable conditionally defines I_SYS_IN, which indicates
2071 to the C program that it should include <sys/in.h> instead of
2074 i_sysioctl (i_sysioctl.U):
2075 This variable conditionally defines the I_SYS_IOCTL symbol, which
2076 indicates to the C program that <sys/ioctl.h> exists and should
2079 i_syslog (i_syslog.U):
2080 This variable conditionally defines the I_SYSLOG symbol,
2081 and indicates whether a C program should include <syslog.h>.
2083 i_sysmman (i_sysmman.U):
2084 This variable conditionally defines the I_SYS_MMAN symbol, and
2085 indicates whether a C program should include <sys/mman.h>.
2087 i_sysmode (i_sysmode.U):
2088 This variable conditionally defines the I_SYSMODE symbol,
2089 and indicates whether a C program should include <sys/mode.h>.
2091 i_sysmount (i_sysmount.U):
2092 This variable conditionally defines the I_SYSMOUNT symbol,
2093 and indicates whether a C program should include <sys/mount.h>.
2095 i_sysndir (i_sysndir.U):
2096 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2097 whether a C program should include <sys/ndir.h>.
2099 i_sysparam (i_sysparam.U):
2100 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2101 whether a C program should include <sys/param.h>.
2103 i_sysresrc (i_sysresrc.U):
2104 This variable conditionally defines the I_SYS_RESOURCE symbol,
2105 and indicates whether a C program should include <sys/resource.h>.
2107 i_syssecrt (i_syssecrt.U):
2108 This variable conditionally defines the I_SYS_SECURITY symbol,
2109 and indicates whether a C program should include <sys/security.h>.
2111 i_sysselct (i_sysselct.U):
2112 This variable conditionally defines I_SYS_SELECT, which indicates
2113 to the C program that it should include <sys/select.h> in order to
2114 get the definition of struct timeval.
2116 i_syssockio (i_sysioctl.U):
2117 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2118 C program that socket ioctl codes may be found in <sys/sockio.h>
2119 instead of <sys/ioctl.h>.
2121 i_sysstat (i_sysstat.U):
2122 This variable conditionally defines the I_SYS_STAT symbol,
2123 and indicates whether a C program should include <sys/stat.h>.
2125 i_sysstatfs (i_sysstatfs.U):
2126 This variable conditionally defines the I_SYSSTATFS symbol,
2127 and indicates whether a C program should include <sys/statfs.h>.
2129 i_sysstatvfs (i_sysstatvfs.U):
2130 This variable conditionally defines the I_SYSSTATVFS symbol,
2131 and indicates whether a C program should include <sys/statvfs.h>.
2133 i_systime (i_time.U):
2134 This variable conditionally defines I_SYS_TIME, which indicates
2135 to the C program that it should include <sys/time.h>.
2137 i_systimek (i_time.U):
2138 This variable conditionally defines I_SYS_TIME_KERNEL, which
2139 indicates to the C program that it should include <sys/time.h>
2140 with KERNEL defined.
2142 i_systimes (i_systimes.U):
2143 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2144 whether a C program should include <sys/times.h>.
2146 i_systypes (i_systypes.U):
2147 This variable conditionally defines the I_SYS_TYPES symbol,
2148 and indicates whether a C program should include <sys/types.h>.
2150 i_sysuio (i_sysuio.U):
2151 This variable conditionally defines the I_SYSUIO symbol, and indicates
2152 whether a C program should include <sys/uio.h>.
2154 i_sysun (i_sysun.U):
2155 This variable conditionally defines I_SYS_UN, which indicates
2156 to the C program that it should include <sys/un.h> to get UNIX
2157 domain socket definitions.
2159 i_sysutsname (i_sysutsname.U):
2160 This variable conditionally defines the I_SYSUTSNAME symbol,
2161 and indicates whether a C program should include <sys/utsname.h>.
2163 i_sysvfs (i_sysvfs.U):
2164 This variable conditionally defines the I_SYSVFS symbol,
2165 and indicates whether a C program should include <sys/vfs.h>.
2167 i_syswait (i_syswait.U):
2168 This variable conditionally defines I_SYS_WAIT, which indicates
2169 to the C program that it should include <sys/wait.h>.
2171 i_termio (i_termio.U):
2172 This variable conditionally defines the I_TERMIO symbol, which
2173 indicates to the C program that it should include <termio.h> rather
2176 i_termios (i_termio.U):
2177 This variable conditionally defines the I_TERMIOS symbol, which
2178 indicates to the C program that the POSIX <termios.h> file is
2182 This variable conditionally defines I_TIME, which indicates
2183 to the C program that it should include <time.h>.
2185 i_unistd (i_unistd.U):
2186 This variable conditionally defines the I_UNISTD symbol, and indicates
2187 whether a C program should include <unistd.h>.
2189 i_ustat (i_ustat.U):
2190 This variable conditionally defines the I_USTAT symbol, and indicates
2191 whether a C program should include <ustat.h>.
2193 i_utime (i_utime.U):
2194 This variable conditionally defines the I_UTIME symbol, and indicates
2195 whether a C program should include <utime.h>.
2197 i_values (i_values.U):
2198 This variable conditionally defines the I_VALUES symbol, and indicates
2199 whether a C program may include <values.h> to get symbols like MAXLONG
2202 i_varargs (i_varhdr.U):
2203 This variable conditionally defines I_VARARGS, which indicates
2204 to the C program that it should include <varargs.h>.
2206 i_varhdr (i_varhdr.U):
2207 Contains the name of the header to be included to get va_dcl definition.
2208 Typically one of varargs.h or stdarg.h.
2210 i_vfork (i_vfork.U):
2211 This variable conditionally defines the I_VFORK symbol, and indicates
2212 whether a C program should include vfork.h.
2214 ignore_versioned_solibs (libs.U):
2215 This variable should be non-empty if non-versioned shared
2216 libraries (libfoo.so.x.y) are to be ignored (because they
2217 cannot be linked against).
2219 inc_version_list (inc_version_list.U):
2220 This variable specifies the list of subdirectories in over
2221 which perl.c:incpush() and lib/lib.pm will automatically
2222 search when adding directories to @INC. The elements in
2223 the list are separated by spaces. This is only useful
2224 if you have a perl library directory tree structured like the
2225 default one. See INSTALL for how this works. The versioned
2226 site_perl directory was introduced in 5.005, so that is the
2227 lowest possible value.
2229 inc_version_list_init (inc_version_list.U):
2230 This variable holds the same list as inc_version_list, but
2231 each item is enclosed in double quotes and separated by commas,
2232 suitable for use in the PERL_INC_VERSION_LIST initialization.
2235 This variable must preceed the normal include path to get hte
2236 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2237 Value can be "" or "/bsd43" on mips.
2240 This variable is defined but not used by Configure.
2241 The value is a plain '' and is not useful.
2243 installarchlib (archlib.U):
2244 This variable is really the same as archlibexp but may differ on
2245 those systems using AFS. For extra portability, only this variable
2246 should be used in makefiles.
2249 This variable is the same as binexp unless AFS is running in which case
2250 the user is explicitely prompted for it. This variable should always
2251 be used in your makefiles for maximum portability.
2253 installman1dir (man1dir.U):
2254 This variable is really the same as man1direxp, unless you are using
2255 AFS in which case it points to the read/write location whereas
2256 man1direxp only points to the read-only access location. For extra
2257 portability, you should only use this variable within your makefiles.
2259 installman3dir (man3dir.U):
2260 This variable is really the same as man3direxp, unless you are using
2261 AFS in which case it points to the read/write location whereas
2262 man3direxp only points to the read-only access location. For extra
2263 portability, you should only use this variable within your makefiles.
2265 installprefix (installprefix.U):
2266 This variable holds the name of the directory below which
2267 "make install" will install the package. For most users, this
2268 is the same as prefix. However, it is useful for
2269 installing the software into a different (usually temporary)
2270 location after which it can be bundled up and moved somehow
2271 to the final location specified by prefix.
2273 installprefixexp (installprefix.U):
2274 This variable holds the full absolute path of installprefix
2275 with all ~-expansion done.
2277 installprivlib (privlib.U):
2278 This variable is really the same as privlibexp but may differ on
2279 those systems using AFS. For extra portability, only this variable
2280 should be used in makefiles.
2282 installscript (scriptdir.U):
2283 This variable is usually the same as scriptdirexp, unless you are on
2284 a system running AFS, in which case they may differ slightly. You
2285 should always use this variable within your makefiles for portability.
2287 installsitearch (sitearch.U):
2288 This variable is really the same as sitearchexp but may differ on
2289 those systems using AFS. For extra portability, only this variable
2290 should be used in makefiles.
2292 installsitebin (sitebin.U):
2293 This variable is usually the same as sitebinexp, unless you are on
2294 a system running AFS, in which case they may differ slightly. You
2295 should always use this variable within your makefiles for portability.
2297 installsitelib (sitelib.U):
2298 This variable is really the same as sitelibexp but may differ on
2299 those systems using AFS. For extra portability, only this variable
2300 should be used in makefiles.
2302 installstyle (installstyle.U):
2303 This variable describes the "style" of the perl installation.
2304 This is intended to be useful for tools that need to
2305 manipulate entire perl distributions. Perl itself doesn't use
2306 this to find its libraries -- the library directories are
2307 stored directly in Config.pm. Currently, there are only two
2308 styles: "lib" and "lib/perl5". The default library locations
2309 (e.g. privlib, sitelib) are either $prefix/lib or
2310 $prefix/lib/perl5. The former is useful if $prefix is a
2311 directory dedicated to perl (e.g. /opt/perl), while the latter
2312 is useful if $prefix is shared by many packages, e.g. if
2314 This may later be extended to include other information, so
2315 be careful with pattern-matching on the results.
2316 For compatibility with perl5.005 and earlier, the default
2317 setting is based on whether or not $prefix contains the string
2320 installusrbinperl (instubperl.U):
2321 This variable tells whether Perl should be installed also as
2322 /usr/bin/perl in addition to
2325 installvendorarch (vendorarch.U):
2326 This variable is really the same as vendorarchexp but may differ on
2327 those systems using AFS. For extra portability, only this variable
2328 should be used in makefiles.
2330 installvendorbin (vendorbin.U):
2331 This variable is really the same as vendorbinexp but may differ on
2332 those systems using AFS. For extra portability, only this variable
2333 should be used in makefiles.
2335 installvendorlib (vendorlib.U):
2336 This variable is really the same as vendorlibexp but may differ on
2337 those systems using AFS. For extra portability, only this variable
2338 should be used in makefiles.
2340 intsize (intsize.U):
2341 This variable contains the value of the INTSIZE symbol, which
2342 indicates to the C program how many bytes there are in an int.
2344 ivdformat (perlxvf.U):
2345 This variable contains the format string used for printing
2346 a Perl IV as a signed decimal integer.
2349 This variable is the size of an IV in bytes.
2352 This variable contains the C type used for Perl's IV.
2354 known_extensions (Extensions.U):
2355 This variable holds a list of all XS extensions included in
2359 This variable is defined but not used by Configure.
2360 The value is a plain '' and is not useful.
2363 This variable contains a flag which will tell the C compiler and loader
2364 to produce a program running with a large memory model. It is up to
2365 the Makefile to use this.
2368 This variable indicates the program to be used to link
2369 libraries for dynamic loading. On some systems, it is 'ld'.
2370 On ELF systems, it should be $cc. Mostly, we'll try to respect
2371 the hint file setting.
2373 lddlflags (dlsrc.U):
2374 This variable contains any special flags that might need to be
2375 passed to $ld to create a shared library suitable for dynamic
2376 loading. It is up to the makefile to use it. For hpux, it
2377 should be '-b'. For sunos 4.1, it is empty.
2379 ldflags (ccflags.U):
2380 This variable contains any additional C loader flags desired by
2381 the user. It is up to the Makefile to use this.
2383 ldlibpthname (libperl.U):
2384 This variable holds the name of the shared library
2385 search path, often LD_LIBRARY_PATH. To get an empty
2386 string, the hints file must set this to 'none'.
2389 This variable is used internally by Configure to determine the
2390 full pathname (if any) of the less program. After Configure runs,
2391 the value is reset to a plain "less" and is not useful.
2394 This is an old synonym for _a.
2397 This variable contains the location of the C library.
2399 libperl (libperl.U):
2400 The perl executable is obtained by linking perlmain.c with
2401 libperl, any static extensions (usually just DynaLoader),
2402 and any other libraries needed on this system. libperl
2403 is usually libperl.a, but can also be libperl.so.xxx if
2404 the user wishes to build a perl executable with a shared
2408 This variable holds the general path (space-separated) used to find
2409 libraries. It is intended to be used by other units.
2412 This variable holds the additional libraries we want to use.
2413 It is up to the Makefile to deal with it.
2416 This variable holds the directory names aka dirnames of the libraries
2417 we found and accepted, duplicates are removed.
2420 This variable holds the filenames aka basenames of the libraries
2421 we found and accepted.
2424 This variable holds the full pathnames of the libraries
2425 we found and accepted.
2428 This variable holds the directory names probed for libraries.
2430 libswanted (Myinit.U):
2431 This variable holds a list of all the libraries we want to
2432 search. The order is chosen to pick up the c library
2433 ahead of ucb or bsd libraries for SVR4.
2436 This variable is defined but not used by Configure.
2437 The value is a plain '' and is not useful.
2440 This variable is defined but not used by Configure.
2441 The value is a plain '' and is not useful.
2443 lkflags (ccflags.U):
2444 This variable contains any additional C partial linker flags desired by
2445 the user. It is up to the Makefile to use this.
2448 This variable is used internally by Configure to determine the
2449 full pathname (if any) of the ln program. After Configure runs,
2450 the value is reset to a plain "ln" and is not useful.
2453 This variable holds the name of the command to make
2454 symbolic links (if they are supported). It can be used
2455 in the Makefile. It is either 'ln -s' or 'ln'
2457 locincpth (ccflags.U):
2458 This variable contains a list of additional directories to be
2459 searched by the compiler. The appropriate '-I' directives will
2460 be added to ccflags. This is intended to simplify setting
2461 local directories from the Configure command line.
2462 It's not much, but it parallels the loclibpth stuff in libpth.U.
2464 loclibpth (libpth.U):
2465 This variable holds the paths (space-separated) used to find local
2466 libraries. It is prepended to libpth, and is intended to be easily
2467 set from the command line.
2469 longdblsize (d_longdbl.U):
2470 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2471 indicates to the C program how many bytes there are in a long double,
2472 if this system supports long doubles.
2474 longlongsize (d_longlong.U):
2475 This variable contains the value of the LONGLONGSIZE symbol, which
2476 indicates to the C program how many bytes there are in a long long,
2477 if this system supports long long.
2479 longsize (intsize.U):
2480 This variable contains the value of the LONGSIZE symbol, which
2481 indicates to the C program how many bytes there are in a long.
2484 This variable is defined but not used by Configure.
2485 The value is a plain '' and is not useful.
2488 This variable is defined but not used by Configure.
2489 The value is a plain '' and is not useful.
2492 This variable is used internally by Configure to determine the
2493 full pathname (if any) of the ls program. After Configure runs,
2494 the value is reset to a plain "ls" and is not useful.
2496 lseeksize (lseektype.U):
2497 This variable defines lseektype to be something like off_t, long,
2498 or whatever type is used to declare lseek offset's type in the
2499 kernel (which also appears to be lseek's return type).
2501 lseektype (lseektype.U):
2502 This variable defines lseektype to be something like off_t, long,
2503 or whatever type is used to declare lseek offset's type in the
2504 kernel (which also appears to be lseek's return type).
2507 This variable is defined but not used by Configure.
2508 The value is a plain '' and is not useful.
2511 This variable is defined but not used by Configure.
2512 The value is a plain '' and is not useful.
2515 This variable is used internally by Configure to determine the
2516 full pathname (if any) of the make program. After Configure runs,
2517 the value is reset to a plain "make" and is not useful.
2519 make_set_make (make.U):
2520 Some versions of 'make' set the variable MAKE. Others do not.
2521 This variable contains the string to be included in Makefile.SH
2522 so that MAKE is set if needed, and not if not needed.
2523 Possible values are:
2524 make_set_make='#' # If your make program handles this for you,
2525 make_set_make="MAKE=$make" # if it doesn't.
2526 I used a comment character so that we can distinguish a
2527 'set' value (from a previous config.sh or Configure '-D' option)
2528 from an uncomputed value.
2530 mallocobj (mallocsrc.U):
2531 This variable contains the name of the malloc.o that this package
2532 generates, if that malloc.o is preferred over the system malloc.
2533 Otherwise the value is null. This variable is intended for generating
2534 Makefiles. See mallocsrc.
2536 mallocsrc (mallocsrc.U):
2537 This variable contains the name of the malloc.c that comes with
2538 the package, if that malloc.c is preferred over the system malloc.
2539 Otherwise the value is null. This variable is intended for generating
2542 malloctype (mallocsrc.U):
2543 This variable contains the kind of ptr returned by malloc and realloc.
2545 man1dir (man1dir.U):
2546 This variable contains the name of the directory in which manual
2547 source pages are to be put. It is the responsibility of the
2548 Makefile.SH to get the value of this into the proper command.
2549 You must be prepared to do the ~name expansion yourself.
2551 man1direxp (man1dir.U):
2552 This variable is the same as the man1dir variable, but is filename
2553 expanded at configuration time, for convenient use in makefiles.
2555 man1ext (man1dir.U):
2556 This variable contains the extension that the manual page should
2557 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2560 man3dir (man3dir.U):
2561 This variable contains the name of the directory in which manual
2562 source pages are to be put. It is the responsibility of the
2563 Makefile.SH to get the value of this into the proper command.
2564 You must be prepared to do the ~name expansion yourself.
2566 man3direxp (man3dir.U):
2567 This variable is the same as the man3dir variable, but is filename
2568 expanded at configuration time, for convenient use in makefiles.
2570 man3ext (man3dir.U):
2571 This variable contains the extension that the manual page should
2572 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2576 This variable is used internally by Configure to determine the
2577 full pathname (if any) of the Mcc program. After Configure runs,
2578 the value is reset to a plain "Mcc" and is not useful.
2581 This variable contains a flag which will tell the C compiler and loader
2582 to produce a program running with a medium memory model. If the
2583 medium model is not supported, contains the flag to produce large
2584 model programs. It is up to the Makefile to use this.
2586 mips_type (usrinc.U):
2587 This variable holds the environment type for the mips system.
2588 Possible values are "BSD 4.3" and "System V".
2591 This variable is used internally by Configure to determine the
2592 full pathname (if any) of the mkdir program. After Configure runs,
2593 the value is reset to a plain "mkdir" and is not useful.
2595 mmaptype (d_mmap.U):
2596 This symbol contains the type of pointer returned by mmap()
2597 (and simultaneously the type of the first argument).
2598 It can be 'void *' or 'caddr_t'.
2601 This variable contains the list of memory models supported by this
2602 system. Possible component values are none, split, unsplit, small,
2603 medium, large, and huge. The component values are space separated.
2605 modetype (modetype.U):
2606 This variable defines modetype to be something like mode_t,
2607 int, unsigned short, or whatever type is used to declare file
2608 modes for system calls.
2611 This variable is used internally by Configure to determine the
2612 full pathname (if any) of the more program. After Configure runs,
2613 the value is reset to a plain "more" and is not useful.
2615 multiarch (multiarch.U):
2616 This variable conditionally defines the MULTIARCH symbol
2617 which signifies the presence of multiplatform files.
2618 This is normally set by hints files.
2621 This variable is defined but not used by Configure.
2622 The value is a plain '' and is not useful.
2624 myarchname (archname.U):
2625 This variable holds the architecture name computed by Configure in
2626 a previous run. It is not intended to be perused by any user and
2627 should never be set in a hint file.
2629 mydomain (myhostname.U):
2630 This variable contains the eventual value of the MYDOMAIN symbol,
2631 which is the domain of the host the program is going to run on.
2632 The domain must be appended to myhostname to form a complete host name.
2633 The dot comes with mydomain, and need not be supplied by the program.
2635 myhostname (myhostname.U):
2636 This variable contains the eventual value of the MYHOSTNAME symbol,
2637 which is the name of the host the program is going to run on.
2638 The domain is not kept with hostname, but must be gotten from mydomain.
2639 The dot comes with mydomain, and need not be supplied by the program.
2641 myuname (Oldconfig.U):
2642 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2643 pseudo variables assignments in the output are stripped, thank you. The
2644 whole thing is then lower-cased.
2647 This variable contains the '-n' flag if that is what causes the echo
2648 command to suppress newline. Otherwise it is null. Correct usage is
2649 $echo $n "prompt for a question: $c".
2651 netdb_hlen_type (netdbtype.U):
2652 This variable holds the type used for the 2nd argument to
2653 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2654 This is only useful if you have gethostbyaddr(), naturally.
2656 netdb_host_type (netdbtype.U):
2657 This variable holds the type used for the 1st argument to
2658 gethostbyaddr(). Usually, this is char * or void *, possibly
2659 with or without a const prefix.
2660 This is only useful if you have gethostbyaddr(), naturally.
2662 netdb_name_type (netdbtype.U):
2663 This variable holds the type used for the argument to
2664 gethostbyname(). Usually, this is char * or const char *.
2665 This is only useful if you have gethostbyname(), naturally.
2667 netdb_net_type (netdbtype.U):
2668 This variable holds the type used for the 1st argument to
2669 getnetbyaddr(). Usually, this is int or long.
2670 This is only useful if you have getnetbyaddr(), naturally.
2673 This variable is used internally by Configure to determine the
2674 full pathname (if any) of the nm program. After Configure runs,
2675 the value is reset to a plain "nm" and is not useful.
2678 This variable holds the options that may be necessary for nm.
2680 nm_so_opt (usenm.U):
2681 This variable holds the options that may be necessary for nm
2682 to work on a shared library but that can not be used on an
2683 archive library. Currently, this is only used by Linux, where
2684 nm --dynamic is *required* to get symbols from an ELF library which
2685 has been stripped, but nm --dynamic is *fatal* on an archive library.
2686 Maybe Linux should just always set usenm=false.
2688 nonxs_ext (Extensions.U):
2689 This variable holds a list of all non-xs extensions included
2690 in the package. All of them will be built.
2693 This variable is used internally by Configure to determine the
2694 full pathname (if any) of the nroff program. After Configure runs,
2695 the value is reset to a plain "nroff" and is not useful.
2698 This variable is the size of an NV in bytes.
2701 This variable contains the C type used for Perl's NV.
2703 o_nonblock (nblock_io.U):
2704 This variable bears the symbol value to be used during open() or fcntl()
2705 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2706 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2707 but that is only supported by some devices.
2710 This is an old synonym for _o.
2712 old_pthread_create_joinable (d_pthrattrj.U):
2713 This variable defines the constant to use for creating joinable
2714 (aka undetached) pthreads. Unused if pthread.h defines
2715 PTHREAD_CREATE_JOINABLE. If used, possible values are
2716 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2718 optimize (ccflags.U):
2719 This variable contains any optimizer/debugger flag that should be used.
2720 It is up to the Makefile to use it.
2722 orderlib (orderlib.U):
2723 This variable is "true" if the components of libraries must be ordered
2724 (with `lorder $* | tsort`) before placing them in an archive. Set to
2725 "false" if ranlib or ar can generate random libraries.
2727 osname (Oldconfig.U):
2728 This variable contains the operating system name (e.g. sunos,
2729 solaris, hpux, etc.). It can be useful later on for setting
2730 defaults. Any spaces are replaced with underscores. It is set
2731 to a null string if we can't figure it out.
2733 osvers (Oldconfig.U):
2734 This variable contains the operating system version (e.g.
2735 4.1.3, 5.2, etc.). It is primarily used for helping select
2736 an appropriate hints file, but might be useful elsewhere for
2737 setting defaults. It is set to '' if we can't figure it out.
2738 We try to be flexible about how much of the version number
2739 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2740 same for this package, hints files might just be os_4.0 or
2741 os_4.1, etc., not keeping separate files for each little release.
2743 package (package.U):
2744 This variable contains the name of the package being constructed.
2745 It is primarily intended for the use of later Configure units.
2748 This variable contains the name of the preferred pager on the system.
2749 Usual values are (the full pathnames of) more, less, pg, or cat.
2752 This variable contains a command that produces the text of the
2753 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2754 "ypcat passwd" when NIS is used.
2755 On some systems, such as os390, there may be no equivalent
2756 command, in which case this variable is unset.
2758 patchlevel (patchlevel.U):
2759 The patchlevel level of this package.
2760 The value of patchlevel comes from the patchlevel.h file.
2761 In a version number such as 5.6.1, this is the "6".
2762 In patchlevel.h, this is referred to as "PERL_VERSION".
2765 This is an old synonym for p_ in Head.U, the character
2766 used to separate elements in the command shell search PATH.
2769 This variable contains the full path (if any) to a previously
2770 installed perl5.005 or later suitable for running the script
2771 to determine inc_version_list.
2774 This variable is defined but not used by Configure.
2775 The value is a plain '' and is not useful.
2777 PERL_REVISION (Oldsyms.U):
2778 In a Perl version number such as 5.6.2, this is the 5.
2779 This value is manually set in patchlevel.h
2781 PERL_SUBVERSION (Oldsyms.U):
2782 In a Perl version number such as 5.6.2, this is the 2.
2783 Values greater than 50 represent potentially unstable
2784 development subversions.
2785 This value is manually set in patchlevel.h
2787 PERL_VERSION (Oldsyms.U):
2788 In a Perl version number such as 5.6.2, this is the 6.
2789 This value is manually set in patchlevel.h
2791 perladmin (perladmin.U):
2792 Electronic mail address of the perl5 administrator.
2794 perlpath (perlpath.U):
2795 This variable contains the eventual value of the PERLPATH symbol,
2796 which contains the name of the perl interpreter to be used in
2797 shell scripts and in the "eval 'exec'" idiom.
2800 This variable is used internally by Configure to determine the
2801 full pathname (if any) of the pg program. After Configure runs,
2802 the value is reset to a plain "pg" and is not useful.
2804 phostname (myhostname.U):
2805 This variable contains the eventual value of the PHOSTNAME symbol,
2806 which is a command that can be fed to popen() to get the host name.
2807 The program should probably not presume that the domain is or isn't
2810 pidtype (pidtype.U):
2811 This variable defines PIDTYPE to be something like pid_t, int,
2812 ushort, or whatever type is used to declare process ids in the kernel.
2815 Holds the private path used by Configure to find out the libraries.
2816 Its value is prepend to libpth. This variable takes care of special
2817 machines, like the mips. Usually, it should be empty.
2819 pm_apiversion (xs_apiversion.U):
2820 This variable contains the version of the oldest perl
2821 compatible with the present perl. (That is, pure perl modules
2822 written for $pm_apiversion will still work for the current
2823 version). perl.c:incpush() and lib/lib.pm will automatically
2824 search in $sitelib for older directories across major versions
2825 back to pm_apiversion. This is only useful if you have a perl
2826 library directory tree structured like the default one. The
2827 versioned site_perl library was introduced in 5.005, so that's
2828 the default setting for this variable. It's hard to imagine
2829 it changing before Perl6. It is included here for symmetry
2830 with xs_apiveprsion -- the searching algorithms will
2831 (presumably) be similar.
2832 See the INSTALL file for how this works.
2835 This variable is defined but not used by Configure.
2836 The value is a plain '' and is not useful.
2839 This variable is defined but not used by Configure.
2840 The value is a plain '' and is not useful.
2843 This variable holds the name of the directory below which the
2844 user will install the package. Usually, this is /usr/local, and
2845 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2846 man pages in /usr/local/man, etc. It is only used to set defaults
2847 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2849 prefixexp (prefix.U):
2850 This variable holds the full absolute path of the directory below
2851 which the user will install the package. Derived from prefix.
2853 privlib (privlib.U):
2854 This variable contains the eventual value of the PRIVLIB symbol,
2855 which is the name of the private library for this package. It may
2856 have a ~ on the front. It is up to the makefile to eventually create
2857 this directory while performing installation (with ~ substitution).
2859 privlibexp (privlib.U):
2860 This variable is the ~name expanded version of privlib, so that you
2861 may use it directly in Makefiles or shell scripts.
2863 prototype (prototype.U):
2864 This variable holds the eventual value of CAN_PROTOTYPE, which
2865 indicates the C compiler can handle funciton prototypes.
2867 ptrsize (ptrsize.U):
2868 This variable contains the value of the PTRSIZE symbol, which
2869 indicates to the C program how many bytes there are in a pointer.
2871 quadkind (quadtype.U):
2872 This variable, if defined, encodes the type of a quad:
2873 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2875 quadtype (quadtype.U):
2876 This variable defines Quad_t to be something like long, int,
2877 long long, int64_t, or whatever type is used for 64-bit integers.
2879 randbits (randfunc.U):
2880 Indicates how many bits are produced by the function used to
2881 generate normalized random numbers.
2883 randfunc (randfunc.U):
2884 Indicates the name of the random number function to use.
2885 Values include drand48, random, and rand. In C programs,
2886 the 'Drand01' macro is defined to generate uniformly distributed
2887 random numbers over the range [0., 1.[ (see drand01 and nrand).
2889 randseedtype (randfunc.U):
2890 Indicates the type of the argument of the seedfunc.
2892 ranlib (orderlib.U):
2893 This variable is set to the pathname of the ranlib program, if it is
2894 needed to generate random libraries. Set to ":" if ar can generate
2895 random libraries or if random libraries are not supported
2897 rd_nodata (nblock_io.U):
2898 This variable holds the return code from read() when no data is
2899 present. It should be -1, but some systems return 0 when O_NDELAY is
2900 used, which is a shame because you cannot make the difference between
2901 no data and an EOF.. Sigh!
2903 revision (patchlevel.U):
2904 The value of revision comes from the patchlevel.h file.
2905 In a version number such as 5.6.1, this is the "5".
2906 In patchlevel.h, this is referred to as "PERL_REVISION".
2909 This variable is used internally by Configure to determine the
2910 full pathname (if any) of the rm program. After Configure runs,
2911 the value is reset to a plain "rm" and is not useful.
2914 This variable is defined but not used by Configure.
2915 The value is a plain '' and is not useful.
2918 This variable contains 'true' or 'false' depending whether the
2919 nm extraction should be performed or not, according to the value
2920 of usenm and the flags on the Configure command line.
2922 sched_yield (d_pthread_y.U):
2923 This variable defines the way to yield the execution
2924 of the current thread.
2926 scriptdir (scriptdir.U):
2927 This variable holds the name of the directory in which the user wants
2928 to put publicly scripts for the package in question. It is either
2929 the same directory as for binaries, or a special one that can be
2930 mounted across different architectures, like /usr/share. Programs
2931 must be prepared to deal with ~name expansion.
2933 scriptdirexp (scriptdir.U):
2934 This variable is the same as scriptdir, but is filename expanded
2935 at configuration time, for programs not wanting to bother with it.
2938 This variable is used internally by Configure to determine the
2939 full pathname (if any) of the sed program. After Configure runs,
2940 the value is reset to a plain "sed" and is not useful.
2942 seedfunc (randfunc.U):
2943 Indicates the random number generating seed function.
2944 Values include srand48, srandom, and srand.
2946 selectminbits (selectminbits.U):
2947 This variable holds the minimum number of bits operated by select.
2948 That is, if you do select(n, ...), how many bits at least will be
2949 cleared in the masks if some activity is detected. Usually this
2950 is either n or 32*ceil(n/32), especially many little-endians do
2951 the latter. This is only useful if you have select(), naturally.
2953 selecttype (selecttype.U):
2954 This variable holds the type used for the 2nd, 3rd, and 4th
2955 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2956 is defined, and 'int *' otherwise. This is only useful if you
2957 have select(), naturally.
2960 This variable is defined but not used by Configure.
2961 The value is a plain '' and is not useful.
2964 This variable contains the full pathname of the shell used
2965 on this system to execute Bourne shell scripts. Usually, this will be
2966 /bin/sh, though it's possible that some systems will have /bin/ksh,
2967 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2969 This unit comes before Options.U, so you can't set sh with a '-D'
2970 option, though you can override this (and startsh)
2971 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2974 This variable is defined but not used by Configure.
2975 The value is a plain '' and is not useful.
2977 sharpbang (spitshell.U):
2978 This variable contains the string #! if this system supports that
2981 shmattype (d_shmat.U):
2982 This symbol contains the type of pointer returned by shmat().
2983 It can be 'void *' or 'char *'.
2985 shortsize (intsize.U):
2986 This variable contains the value of the SHORTSIZE symbol which
2987 indicates to the C program how many bytes there are in a short.
2989 shrpenv (libperl.U):
2990 If the user builds a shared libperl.so, then we need to tell the
2991 'perl' executable where it will be able to find the installed libperl.so.
2992 One way to do this on some systems is to set the environment variable
2993 LD_RUN_PATH to the directory that will be the final location of the
2994 shared libperl.so. The makefile can use this with something like
2995 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2997 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3000 See the main perl Makefile.SH for actual working usage.
3001 Alternatively, we might be able to use a command line option such
3002 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3003 $archlibexp/CORE (Linux).
3005 shsharp (spitshell.U):
3006 This variable tells further Configure units whether your sh can
3009 sig_count (sig_name.U):
3010 This variable holds a number larger than the largest valid
3011 signal number. This is usually the same as the NSIG macro.
3013 sig_name (sig_name.U):
3014 This variable holds the signal names, space separated. The leading
3015 SIG in signal name is removed. A ZERO is prepended to the
3016 list. This is currently not used.
3018 sig_name_init (sig_name.U):
3019 This variable holds the signal names, enclosed in double quotes and
3020 separated by commas, suitable for use in the SIG_NAME definition
3021 below. A "ZERO" is prepended to the list, and the list is
3022 terminated with a plain 0. The leading SIG in signal names
3023 is removed. See sig_num.
3025 sig_num (sig_name.U):
3026 This variable holds the signal numbers, space separated. A ZERO is
3027 prepended to the list (corresponding to the fake SIGZERO), and
3028 the list is terminated with a 0. Those numbers correspond to
3029 the value of the signal listed in the same place within the
3032 sig_num_init (sig_name.U):
3033 This variable holds the signal numbers, enclosed in double quotes and
3034 separated by commas, suitable for use in the SIG_NUM definition
3035 below. A "ZERO" is prepended to the list, and the list is
3036 terminated with a plain 0.
3038 signal_t (d_voidsig.U):
3039 This variable holds the type of the signal handler (void or int).
3041 sitearch (sitearch.U):
3042 This variable contains the eventual value of the SITEARCH symbol,
3043 which is the name of the private library for this package. It may
3044 have a ~ on the front. It is up to the makefile to eventually create
3045 this directory while performing installation (with ~ substitution).
3046 The standard distribution will put nothing in this directory.
3047 After perl has been installed, users may install their own local
3048 architecture-dependent modules in this directory with
3049 MakeMaker Makefile.PL
3050 or equivalent. See INSTALL for details.
3052 sitearchexp (sitearch.U):
3053 This variable is the ~name expanded version of sitearch, so that you
3054 may use it directly in Makefiles or shell scripts.
3056 sitebin (sitebin.U):
3057 This variable holds the name of the directory in which the user wants
3058 to put add-on publicly executable files for the package in question. It
3059 is most often a local directory such as /usr/local/bin. Programs using
3060 this variable must be prepared to deal with ~name substitution.
3061 The standard distribution will put nothing in this directory.
3062 After perl has been installed, users may install their own local
3063 executables in this directory with
3064 MakeMaker Makefile.PL
3065 or equivalent. See INSTALL for details.
3067 sitebinexp (sitebin.U):
3068 This is the same as the sitebin variable, but is filename expanded at
3069 configuration time, for use in your makefiles.
3071 sitelib (sitelib.U):
3072 This variable contains the eventual value of the SITELIB symbol,
3073 which is the name of the private library for this package. It may
3074 have a ~ on the front. It is up to the makefile to eventually create
3075 this directory while performing installation (with ~ substitution).
3076 The standard distribution will put nothing in this directory.
3077 After perl has been installed, users may install their own local
3078 architecture-independent modules in this directory with
3079 MakeMaker Makefile.PL
3080 or equivalent. See INSTALL for details.
3082 sitelib_stem (sitelib.U):
3083 This variable is $sitelibexp with any trailing version-specific component
3084 removed. The elements in inc_version_list (inc_version_list.U) can
3085 be tacked onto this variable to generate a list of directories to search.
3087 sitelibexp (sitelib.U):
3088 This variable is the ~name expanded version of sitelib, so that you
3089 may use it directly in Makefiles or shell scripts.
3091 siteprefix (siteprefix.U):
3092 This variable holds the full absolute path of the directory below
3093 which the user will install add-on packages.
3094 See INSTALL for usage and examples.
3096 siteprefixexp (siteprefix.U):
3097 This variable holds the full absolute path of the directory below
3098 which the user will install add-on packages. Derived from siteprefix.
3100 sizesize (sizesize.U):
3101 This variable contains the size of a sizetype in bytes.
3103 sizetype (sizetype.U):
3104 This variable defines sizetype to be something like size_t,
3105 unsigned long, or whatever type is used to declare length
3106 parameters for string functions.
3109 This variable is defined but not used by Configure.
3110 The value is a plain '' and is not useful.
3113 This variable is defined but not used by Configure.
3114 The value is a plain '' and is not useful.
3117 This variable contains a flag which will tell the C compiler and loader
3118 to produce a program running with a small memory model. It is up to
3119 the Makefile to use this.
3122 This variable holds the extension used to identify shared libraries
3123 (also known as shared objects) on the system. Usually set to 'so'.
3125 sockethdr (d_socket.U):
3126 This variable has any cpp '-I' flags needed for socket support.
3128 socketlib (d_socket.U):
3129 This variable has the names of any libraries needed for socket support.
3131 socksizetype (socksizetype.U):
3132 This variable holds the type used for the size argument
3133 for various socket calls like accept. Usual values include
3134 socklen_t, size_t, and int.
3137 This variable is used internally by Configure to determine the
3138 full pathname (if any) of the sort program. After Configure runs,
3139 the value is reset to a plain "sort" and is not useful.
3141 spackage (package.U):
3142 This variable contains the name of the package being constructed,
3143 with the first letter uppercased, i.e. suitable for starting
3146 spitshell (spitshell.U):
3147 This variable contains the command necessary to spit out a runnable
3148 shell on this system. It is either cat or a grep '-v' for # comments.
3151 This variable contains a flag which will tell the C compiler and loader
3152 to produce a program that will run in separate I and D space, for those
3153 machines that support separation of instruction and data space. It is
3154 up to the Makefile to use this.
3156 sPRId64 (quadfio.U):
3157 This variable, if defined, contains the string used by stdio to
3158 format 64-bit decimal numbers (format 'd') for output.
3160 sPRIeldbl (longdblfio.U):
3161 This variable, if defined, contains the string used by stdio to
3162 format long doubles (format 'e') for output.
3164 sPRIEldbl (longdblfio.U):
3165 This variable, if defined, contains the string used by stdio to
3166 format long doubles (format 'E') for output.
3168 sPRIfldbl (longdblfio.U):
3169 This variable, if defined, contains the string used by stdio to
3170 format long doubles (format 'f') for output.
3172 sPRIFldbl (longdblfio.U):
3173 This variable, if defined, contains the string used by stdio to
3174 format long doubles (format 'F') for output.
3176 sPRIgldbl (longdblfio.U):
3177 This variable, if defined, contains the string used by stdio to
3178 format long doubles (format 'g') for output.
3180 sPRIGldbl (longdblfio.U):
3181 This variable, if defined, contains the string used by stdio to
3182 format long doubles (format 'G') for output.
3184 sPRIi64 (quadfio.U):
3185 This variable, if defined, contains the string used by stdio to
3186 format 64-bit decimal numbers (format 'i') for output.
3188 sPRIo64 (quadfio.U):
3189 This variable, if defined, contains the string used by stdio to
3190 format 64-bit octal numbers (format 'o') for output.
3192 sPRIu64 (quadfio.U):
3193 This variable, if defined, contains the string used by stdio to
3194 format 64-bit unsigned decimal numbers (format 'u') for output.
3196 sPRIx64 (quadfio.U):
3197 This variable, if defined, contains the string used by stdio to
3198 format 64-bit hexadecimal numbers (format 'x') for output.
3200 sPRIX64 (quadfio.U):
3201 This variable, if defined, contains the string used by stdio to
3202 format 64-bit hExADECimAl numbers (format 'X') for output.
3205 This variable holds the path to the package source. It is up to
3206 the Makefile to use this variable and set VPATH accordingly to
3207 find the sources remotely.
3209 ssizetype (ssizetype.U):
3210 This variable defines ssizetype to be something like ssize_t,
3211 long or int. It is used by functions that return a count
3212 of bytes or an error condition. It must be a signed type.
3213 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3215 startperl (startperl.U):
3216 This variable contains the string to put on the front of a perl
3217 script to make sure (hopefully) that it runs with perl and not some
3218 shell. Of course, that leading line must be followed by the classical
3220 eval 'exec perl -S $0 ${1+"$@"}'
3221 if $running_under_some_shell;
3222 to guarantee perl startup should the shell execute the script. Note
3223 that this magic incatation is not understood by csh.
3225 startsh (startsh.U):
3226 This variable contains the string to put on the front of a shell
3227 script to make sure (hopefully) that it runs with sh and not some
3230 static_ext (Extensions.U):
3231 This variable holds a list of XS extension files we want to
3232 link statically into the package. It is used by Makefile.
3234 stdchar (stdchar.U):
3235 This variable conditionally defines STDCHAR to be the type of char
3236 used in stdio.h. It has the values "unsigned char" or "char".
3238 stdio_base (d_stdstdio.U):
3239 This variable defines how, given a FILE pointer, fp, to access the
3240 _base field (or equivalent) of stdio.h's FILE structure. This will
3241 be used to define the macro FILE_base(fp).
3243 stdio_bufsiz (d_stdstdio.U):
3244 This variable defines how, given a FILE pointer, fp, to determine
3245 the number of bytes store in the I/O buffer pointer to by the
3246 _base field (or equivalent) of stdio.h's FILE structure. This will
3247 be used to define the macro FILE_bufsiz(fp).
3249 stdio_cnt (d_stdstdio.U):
3250 This variable defines how, given a FILE pointer, fp, to access the
3251 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3252 be used to define the macro FILE_cnt(fp).
3254 stdio_filbuf (d_stdstdio.U):
3255 This variable defines how, given a FILE pointer, fp, to tell
3256 stdio to refill it's internal buffers (?). This will
3257 be used to define the macro FILE_filbuf(fp).
3259 stdio_ptr (d_stdstdio.U):
3260 This variable defines how, given a FILE pointer, fp, to access the
3261 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3262 be used to define the macro FILE_ptr(fp).
3264 stdio_stream_array (stdio_streams.U):
3265 This variable tells the name of the array holding the stdio streams.
3266 Usual values include _iob, __iob, and __sF.
3268 strings (i_string.U):
3269 This variable holds the full path of the string header that will be
3270 used. Typically /usr/include/string.h or /usr/include/strings.h.
3273 This variable is defined but not used by Configure.
3274 The value is a plain '' and is not useful.
3276 subversion (patchlevel.U):
3277 The subversion level of this package.
3278 The value of subversion comes from the patchlevel.h file.
3279 In a version number such as 5.6.1, this is the "1".
3280 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3281 This is unique to perl.
3284 This variable holds the place where the manual is located on this
3285 system. It is not the place where the user wants to put his manual
3286 pages. Rather it is the place where Configure may look to find manual
3287 for unix commands (section 1 of the manual usually). See mansrc.
3290 This variable is defined but not used by Configure.
3291 The value is a plain '' and is not useful.
3294 This variable is defined but not used by Configure.
3295 The value is a plain '' and is not useful.
3298 This variable is defined but not used by Configure.
3299 The value is a plain '' and is not useful.
3302 This variable is defined but not used by Configure.
3303 The value is a plain '' and is not useful.
3306 This variable is used internally by Configure to determine the
3307 full pathname (if any) of the test program. After Configure runs,
3308 the value is reset to a plain "test" and is not useful.
3310 timeincl (i_time.U):
3311 This variable holds the full path of the included time header(s).
3313 timetype (d_time.U):
3314 This variable holds the type returned by time(). It can be long,
3315 or time_t on BSD sites (in which case <sys/types.h> should be
3316 included). Anyway, the type Time_t should be used.
3319 This variable is used internally by Configure to determine the
3320 full pathname (if any) of the touch program. After Configure runs,
3321 the value is reset to a plain "touch" and is not useful.
3324 This variable is used internally by Configure to determine the
3325 full pathname (if any) of the tr program. After Configure runs,
3326 the value is reset to a plain "tr" and is not useful.
3329 This variable contains the value to be passed to the tr(1)
3330 command to transliterate a newline. Typical values are
3331 '\012' and '\n'. This is needed for EBCDIC systems where
3332 newline is not necessarily '\012'.
3335 This variable is defined but not used by Configure.
3336 The value is a plain '' and is not useful.
3339 This variable is the size of an U16 in bytes.
3342 This variable contains the C type used for Perl's U16.
3345 This variable is the size of an U32 in bytes.
3348 This variable contains the C type used for Perl's U32.
3351 This variable is the size of an U64 in bytes.
3354 This variable contains the C type used for Perl's U64.
3357 This variable is the size of an U8 in bytes.
3360 This variable contains the C type used for Perl's U8.
3363 This variable contains the format string used for printing a Uid_t.
3365 uidsign (uidsign.U):
3366 This variable contains the signedness of a uidtype.
3367 1 for unsigned, -1 for signed.
3369 uidsize (uidsize.U):
3370 This variable contains the size of a uidtype in bytes.
3372 uidtype (uidtype.U):
3373 This variable defines Uid_t to be something like uid_t, int,
3374 ushort, or whatever type is used to declare user ids in the kernel.
3377 This variable is used internally by Configure to determine the
3378 full pathname (if any) of the uname program. After Configure runs,
3379 the value is reset to a plain "uname" and is not useful.
3382 This variable is used internally by Configure to determine the
3383 full pathname (if any) of the uniq program. After Configure runs,
3384 the value is reset to a plain "uniq" and is not useful.
3386 uquadtype (quadtype.U):
3387 This variable defines Uquad_t to be something like unsigned long,
3388 unsigned int, unsigned long long, uint64_t, or whatever type is
3389 used for 64-bit integers.
3391 use5005threads (usethreads.U):
3392 This variable conditionally defines the USE_5005THREADS symbol,
3393 and indicates that Perl should be built to use the 5.005-based
3394 threading implementation.
3396 use64bitall (use64bits.U):
3397 This variable conditionally defines the USE_64_BIT_ALL symbol,
3398 and indicates that 64-bit integer types should be used
3399 when available. The maximal possible
3400 64-bitness is employed: LP64 or ILP64, meaning that you will
3401 be able to use more than 2 gigabytes of memory. This mode is
3402 even more binary incompatible than USE_64_BIT_INT. You may not
3403 be able to run the resulting executable in a 32-bit CPU at all or
3404 you may need at least to reboot your OS to 64-bit mode.
3406 use64bitint (use64bits.U):
3407 This variable conditionally defines the USE_64_BIT_INT symbol,
3408 and indicates that 64-bit integer types should be used
3409 when available. The minimal possible 64-bitness
3410 is employed, just enough to get 64-bit integers into Perl.
3411 This may mean using for example "long longs", while your memory
3412 may still be limited to 2 gigabytes.
3415 This variable indicates if the system supports dynamic
3416 loading of some sort. See also dlsrc and dlobj.
3418 useithreads (usethreads.U):
3419 This variable conditionally defines the USE_ITHREADS symbol,
3420 and indicates that Perl should be built to use the interpreter-based
3421 threading implementation.
3423 uselargefiles (uselfs.U):
3424 This variable conditionally defines the USE_LARGE_FILES symbol,
3425 and indicates that large file interfaces should be used when
3428 uselongdouble (uselongdbl.U):
3429 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3430 and indicates that long doubles should be used when available.
3432 usemorebits (usemorebits.U):
3433 This variable conditionally defines the USE_MORE_BITS symbol,
3434 and indicates that explicit 64-bit interfaces and long doubles
3435 should be used when available.
3437 usemultiplicity (usemultiplicity.U):
3438 This variable conditionally defines the MULTIPLICITY symbol,
3439 and indicates that Perl should be built to use multiplicity.
3441 usemymalloc (mallocsrc.U):
3442 This variable contains y if the malloc that comes with this package
3443 is desired over the system's version of malloc. People often include
3444 special versions of malloc for effiency, but such versions are often
3445 less portable. See also mallocsrc and mallocobj.
3446 If this is 'y', then -lmalloc is removed from $libs.
3449 This variable contains 'true' or 'false' depending whether the
3450 nm extraction is wanted or not.
3452 useopcode (Extensions.U):
3453 This variable holds either 'true' or 'false' to indicate
3454 whether the Opcode extension should be used. The sole
3455 use for this currently is to allow an easy mechanism
3456 for users to skip the Opcode extension from the Configure
3459 useperlio (useperlio.U):
3460 This variable conditionally defines the USE_PERLIO symbol,
3461 and indicates that the PerlIO abstraction should be
3464 useposix (Extensions.U):
3465 This variable holds either 'true' or 'false' to indicate
3466 whether the POSIX extension should be used. The sole
3467 use for this currently is to allow an easy mechanism
3468 for hints files to indicate that POSIX will not compile
3469 on a particular system.
3472 This variable is set to true when the user agrees to use sfio.
3473 It is set to false when sfio is not available or when the user
3474 explicitely requests not to use sfio. It is here primarily so
3475 that command-line settings can override the auto-detection of
3476 d_sfio without running into a "WHOA THERE".
3478 useshrplib (libperl.U):
3479 This variable is set to 'yes' if the user wishes
3480 to build a shared libperl, and 'no' otherwise.
3482 usesocks (usesocks.U):
3483 This variable conditionally defines the USE_SOCKS symbol,
3484 and indicates that Perl should be built to use SOCKS.
3486 usethreads (usethreads.U):
3487 This variable conditionally defines the USE_THREADS symbol,
3488 and indicates that Perl should be built to use threads.
3490 usevendorprefix (vendorprefix.U):
3491 This variable tells whether the vendorprefix
3492 and consequently other vendor* paths are in use.
3494 usevfork (d_vfork.U):
3495 This variable is set to true when the user accepts to use vfork.
3496 It is set to false when no vfork is available or when the user
3497 explicitely requests not to use vfork.
3500 This variable holds the path of the include files, which is
3501 usually /usr/include. It is mainly used by other Configure units.
3504 This variable is defined but not used by Configure.
3505 The value is a plain '' and is not useful.
3507 uvoformat (perlxvf.U):
3508 This variable contains the format string used for printing
3509 a Perl UV as an unsigned octal integer.
3512 This variable is the size of a UV in bytes.
3515 This variable contains the C type used for Perl's UV.
3517 uvuformat (perlxvf.U):
3518 This variable contains the format string used for printing
3519 a Perl UV as an unsigned decimal integer.
3521 uvxformat (perlxvf.U):
3522 This variable contains the format string used for printing
3523 a Perl UV as an unsigned hexadecimal integer.
3525 vendorarch (vendorarch.U):
3526 This variable contains the value of the PERL_VENDORARCH symbol.
3527 It may have a ~ on the front.
3528 The standard distribution will put nothing in this directory.
3529 Vendors who distribute perl may wish to place their own
3530 architecture-dependent modules and extensions in this directory with
3531 MakeMaker Makefile.PL INSTALLDIRS=vendor
3532 or equivalent. See INSTALL for details.
3534 vendorarchexp (vendorarch.U):
3535 This variable is the ~name expanded version of vendorarch, so that you
3536 may use it directly in Makefiles or shell scripts.
3538 vendorbin (vendorbin.U):
3539 This variable contains the eventual value of the VENDORBIN symbol.
3540 It may have a ~ on the front.
3541 The standard distribution will put nothing in this directory.
3542 Vendors who distribute perl may wish to place additional
3543 binaries in this directory with
3544 MakeMaker Makefile.PL INSTALLDIRS=vendor
3545 or equivalent. See INSTALL for details.
3547 vendorbinexp (vendorbin.U):
3548 This variable is the ~name expanded version of vendorbin, so that you
3549 may use it directly in Makefiles or shell scripts.
3551 vendorlib (vendorlib.U):
3552 This variable contains the eventual value of the VENDORLIB symbol,
3553 which is the name of the private library for this package.
3554 The standard distribution will put nothing in this directory.
3555 Vendors who distribute perl may wish to place their own
3556 modules in this directory with
3557 MakeMaker Makefile.PL INSTALLDIRS=vendor
3558 or equivalent. See INSTALL for details.
3560 vendorlib_stem (vendorlib.U):
3561 This variable is $vendorlibexp with any trailing version-specific component
3562 removed. The elements in inc_version_list (inc_version_list.U) can
3563 be tacked onto this variable to generate a list of directories to search.
3565 vendorlibexp (vendorlib.U):
3566 This variable is the ~name expanded version of vendorlib, so that you
3567 may use it directly in Makefiles or shell scripts.
3569 vendorprefix (vendorprefix.U):
3570 This variable holds the full absolute path of the directory below
3571 which the vendor will install add-on packages.
3572 See INSTALL for usage and examples.
3574 vendorprefixexp (vendorprefix.U):
3575 This variable holds the full absolute path of the directory below
3576 which the vendor will install add-on packages. Derived from vendorprefix.
3578 version (patchlevel.U):
3579 The full version number of this package, such as 5.6.1 (or 5_6_1).
3580 This combines revision, patchlevel, and subversion to get the
3581 full version number, including any possible subversions.
3582 This is suitable for use as a directory name, and hence is
3583 filesystem dependent.
3586 This variable is defined but not used by Configure.
3587 The value is a plain '' and is not useful.
3589 voidflags (voidflags.U):
3590 This variable contains the eventual value of the VOIDFLAGS symbol,
3591 which indicates how much support of the void type is given by this
3592 compiler. See VOIDFLAGS for more info.
3595 This variable holds extra path (space-separated) used to find
3596 libraries on this platform, for example CPU-specific libraries
3597 (on multi-CPU platforms) may be listed here.
3599 xs_apiversion (xs_apiversion.U):
3600 This variable contains the version of the oldest perl binary
3601 compatible with the present perl. perl.c:incpush() and
3602 lib/lib.pm will automatically search in $sitearch for older
3603 directories across major versions back to xs_apiversion.
3604 This is only useful if you have a perl library directory tree
3605 structured like the default one.
3606 See INSTALL for how this works.
3607 The versioned site_perl directory was introduced in 5.005,
3608 so that is the lowest possible value.
3609 Since this can depend on compile time options (such as
3610 bincompat) it is set by Configure. Other non-default sources
3611 of potential incompatibility, such as multiplicity, threads,
3612 debugging, 64bits, sfio, etc., are not checked for currently,
3613 though in principle we could go snooping around in old
3617 This variable is defined but not used by Configure.
3618 The value is a plain '' and is not useful.
3621 This variable is used internally by Configure to determine the
3622 full pathname (if any) of the zip program. After Configure runs,
3623 the value is reset to a plain "zip" and is not useful.