1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is 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' and 'gcc'.
178 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
180 cccdlflags (dlsrc.U):
181 This variable contains any special flags that might need to be
182 passed with 'cc -c' to compile modules to be used to create a shared
183 library that will be used for dynamic loading. For hpux, this
184 should be +z. It is up to the makefile to use it.
187 This variable contains any special flags that might need to be
188 passed to cc to link with a shared library for dynamic loading.
189 It is up to the makefile to use it. For sunos 4.1, it should
193 This variable contains any additional C compiler flags desired by
194 the user. It is up to the Makefile to use this.
196 ccflags_uselargefiles (uselfs.U):
197 This variable contains the compiler flags needed by large file builds
198 and added to ccflags by hints files.
201 This can set either by hints files or by Configure. If using
202 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
203 Some platforms, however, make good use of this by storing the
204 flavor of the C compiler being used here. For example if using
205 the Sun WorkShop suite, ccname will be 'workshop'.
207 ccsymbols (Cppsym.U):
208 The variable contains the symbols defined by the C compiler alone.
209 The symbols defined by cpp or by cc when it calls cpp are not in
210 this list, see cppsymbols and cppccsymbols.
211 The list is a space-separated list of symbol=value tokens.
213 ccversion (Checkcc.U):
214 This can set either by hints files or by Configure. If using
215 a (non-gcc) vendor cc, this variable may contain a version for
219 Login name of the person who ran the Configure script and answered the
220 questions. This is used to tag both config.sh and config_h.SH.
222 cf_email (cf_email.U):
223 Electronic mail address of the person who ran Configure. This can be
224 used by units that require the user's e-mail, like MailList.U.
227 Holds the output of the "date" command when the configuration file was
228 produced. This is used to tag both config.sh and config_h.SH.
230 charsize (charsize.U):
231 This variable contains the value of the CHARSIZE symbol, which
232 indicates to the C program how many bytes there are in a character.
235 This variable is defined but not used by Configure.
236 The value is a plain '' and is not useful.
239 This variable is defined but not used by Configure.
240 The value is a plain '' and is not useful.
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
246 clocktype (d_times.U):
247 This variable holds the type returned by times(). It can be long,
248 or clock_t on BSD sites (in which case <sys/types.h> should be
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the comm program. After Configure runs,
254 the value is reset to a plain "comm" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
260 CONFIGDOTSH (Oldsyms.U):
261 This is set to 'true' in config.sh so that a shell script
262 sourcing config.sh can tell if it has been sourced already.
264 contains (contains.U):
265 This variable holds the command to do a grep with a proper return
266 status. On most sane systems it is simply "grep". On insane systems
267 it is a grep followed by a cat followed by a test. This variable
268 is primarily for the use of other Configure units.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the cp program. After Configure runs,
273 the value is reset to a plain "cp" and is not useful.
276 This variable is defined but not used by Configure.
277 The value is a plain '' and is not useful.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the cpp program. After Configure runs,
282 the value is reset to a plain "cpp" and is not useful.
284 cpp_stuff (cpp_stuff.U):
285 This variable contains an identification of the catenation mechanism
286 used by the C preprocessor.
288 cppccsymbols (Cppsym.U):
289 The variable contains the symbols defined by the C compiler
290 when it calls cpp. The symbols defined by the cc alone or cpp
291 alone are not in this list, see ccsymbols and cppsymbols.
292 The list is a space-separated list of symbol=value tokens.
294 cppflags (ccflags.U):
295 This variable holds the flags that will be passed to the C pre-
296 processor. It is up to the Makefile to use it.
298 cpplast (cppstdin.U):
299 This variable has the same functionality as cppminus, only it applies
300 to cpprun and not cppstdin.
302 cppminus (cppstdin.U):
303 This variable contains the second part of the string which will invoke
304 the C preprocessor on the standard input and produce to standard
305 output. This variable will have the value "-" if cppstdin needs
306 a minus to specify standard input, otherwise the value is "".
309 This variable contains the command which will invoke a C preprocessor
310 on standard input and put the output to stdout. It is guaranteed not
311 to be a wrapper and may be a null string if no preprocessor can be
312 made directly available. This preprocessor might be different from the
313 one used by the C compiler. Don't forget to append cpplast after the
314 preprocessor options.
316 cppstdin (cppstdin.U):
317 This variable contains the command which will invoke the C
318 preprocessor on standard input and put the output to stdout.
319 It is primarily used by other Configure units that ask about
320 preprocessor symbols.
322 cppsymbols (Cppsym.U):
323 The variable contains the symbols defined by the C preprocessor
324 alone. The symbols defined by cc or by cc when it calls cpp are
325 not in this list, see ccsymbols and cppccsymbols.
326 The list is a space-separated list of symbol=value tokens.
328 crosscompile (crosscompile.U):
329 This variable conditionally defines the CROSSCOMPILE symbol
330 which signifies that the build process is be a cross-compilation.
331 This is normally set by hints files or from Configure command line.
333 cryptlib (d_crypt.U):
334 This variable holds -lcrypt or the path to a libcrypt.a archive if
335 the crypt() function is not defined in the standard C library. It is
336 up to the Makefile to use this.
339 This variable is used internally by Configure to determine the
340 full pathname (if any) of the csh program. After Configure runs,
341 the value is reset to a plain "csh" and is not useful.
343 d_access (d_access.U):
344 This variable conditionally defines HAS_ACCESS if the access() system
345 call is available to check for access permissions using real IDs.
347 d_accessx (d_accessx.U):
348 This variable conditionally defines the HAS_ACCESSX symbol, which
349 indicates to the C program that the accessx() routine is available.
352 This variable conditionally defines the HAS_ALARM symbol, which
353 indicates to the C program that the alarm() routine is available.
355 d_archlib (archlib.U):
356 This variable conditionally defines ARCHLIB to hold the pathname
357 of architecture-dependent library files for $package. If
358 $archlib is the same as $privlib, then this is set to undef.
361 This variable conditionally defines the HAS_ATOLF symbol, which
362 indicates to the C program that the atolf() routine is available.
365 This variable conditionally defines the HAS_ATOLL symbol, which
366 indicates to the C program that the atoll() routine is available.
368 d_attribut (d_attribut.U):
369 This variable conditionally defines HASATTRIBUTE, which
370 indicates the C compiler can check for function attributes,
371 such as printf formats.
374 This variable conditionally defines the HAS_BCMP symbol if
375 the bcmp() routine is available to compare strings.
378 This variable conditionally defines the HAS_BCOPY symbol if
379 the bcopy() routine is available to copy strings.
381 d_bincompat5005 (bincompat5005.U):
382 This variable conditionally defines BINCOMPAT5005 so that embed.h
383 can take special action if this version of Perl should be
384 binary-compatible with Perl 5.005. This is impossible for builds
385 that use features like threads and multiplicity it is always $undef
389 This symbol conditionally defines the symbol BSD when running on a
392 d_bsdgetpgrp (d_getpgrp.U):
393 This variable conditionally defines USE_BSD_GETPGRP if
394 getpgrp needs one arguments whereas USG one needs none.
396 d_bsdsetpgrp (d_setpgrp.U):
397 This variable conditionally defines USE_BSD_SETPGRP if
398 setpgrp needs two arguments whereas USG one needs none.
399 See also d_setpgid for a POSIX interface.
402 This variable conditionally defines the HAS_BZERO symbol if
403 the bzero() routine is available to set memory to 0.
405 d_casti32 (d_casti32.U):
406 This variable conditionally defines CASTI32, which indicates
407 whether the C compiler can cast large floats to 32-bit ints.
409 d_castneg (d_castneg.U):
410 This variable conditionally defines CASTNEG, which indicates
411 wether the C compiler can cast negative float to unsigned.
413 d_charvspr (d_vprintf.U):
414 This variable conditionally defines CHARVSPRINTF if this system
415 has vsprintf returning type (char*). The trend seems to be to
416 declare it as "int vsprintf()".
419 This variable conditionally defines the HAS_CHOWN symbol, which
420 indicates to the C program that the chown() routine is available.
422 d_chroot (d_chroot.U):
423 This variable conditionally defines the HAS_CHROOT symbol, which
424 indicates to the C program that the chroot() routine is available.
426 d_chsize (d_chsize.U):
427 This variable conditionally defines the CHSIZE symbol, which
428 indicates to the C program that the chsize() routine is available
429 to truncate files. You might need a -lx to get this routine.
431 d_closedir (d_closedir.U):
432 This variable conditionally defines HAS_CLOSEDIR if closedir() is
436 This variable conditionally defines the HASCONST symbol, which
437 indicates to the C program that this C compiler knows about the
441 This variable conditionally defines the CRYPT symbol, which
442 indicates to the C program that the crypt() routine is available
443 to encrypt passwords and the like.
446 This variable conditionally defines the CSH symbol, which
447 indicates to the C program that the C-shell exists.
449 d_cuserid (d_cuserid.U):
450 This variable conditionally defines the HAS_CUSERID symbol, which
451 indicates to the C program that the cuserid() routine is available
452 to get character login names.
454 d_dbl_dig (d_dbl_dig.U):
455 This variable conditionally defines d_dbl_dig if this system's
456 header files provide DBL_DIG, which is the number of significant
457 digits in a double precision number.
459 d_difftime (d_difftime.U):
460 This variable conditionally defines the HAS_DIFFTIME symbol, which
461 indicates to the C program that the difftime() routine is available.
463 d_dirnamlen (i_dirent.U):
464 This variable conditionally defines DIRNAMLEN, which indicates
465 to the C program that the length of directory entry names is
466 provided by a d_namelen field.
468 d_dlerror (d_dlerror.U):
469 This variable conditionally defines the HAS_DLERROR symbol, which
470 indicates to the C program that the dlerror() routine is available.
472 d_dlopen (d_dlopen.U):
473 This variable conditionally defines the HAS_DLOPEN symbol, which
474 indicates to the C program that the dlopen() routine is available.
476 d_dlsymun (d_dlsymun.U):
477 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
478 indicates that we need to prepend an underscore to the symbol
479 name before calling dlsym().
481 d_dosuid (d_dosuid.U):
482 This variable conditionally defines the symbol DOSUID, which
483 tells the C program that it should insert setuid emulation code
484 on hosts which have setuid #! scripts disabled.
486 d_drand48proto (d_drand48proto.U):
487 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
488 which indicates to the C program that the system provides
489 a prototype for the drand48() function. Otherwise, it is
490 up to the program to supply one.
493 This variable conditionally defines HAS_DUP2 if dup2() is
494 available to duplicate file descriptors.
496 d_eaccess (d_eaccess.U):
497 This variable conditionally defines the HAS_EACCESS symbol, which
498 indicates to the C program that the eaccess() routine is available.
500 d_endgrent (d_endgrent.U):
501 This variable conditionally defines the HAS_ENDGRENT symbol, which
502 indicates to the C program that the endgrent() routine is available
503 for sequential access of the group database.
505 d_endhent (d_endhent.U):
506 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
507 available to close whatever was being used for host queries.
509 d_endnent (d_endnent.U):
510 This variable conditionally defines HAS_ENDNETENT if endnetent() is
511 available to close whatever was being used for network queries.
513 d_endpent (d_endpent.U):
514 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
515 available to close whatever was being used for protocol queries.
517 d_endpwent (d_endpwent.U):
518 This variable conditionally defines the HAS_ENDPWENT symbol, which
519 indicates to the C program that the endpwent() routine is available
520 for sequential access of the passwd database.
522 d_endsent (d_endsent.U):
523 This variable conditionally defines HAS_ENDSERVENT if endservent() is
524 available to close whatever was being used for service queries.
526 d_eofnblk (nblock_io.U):
527 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
528 when reading from a non-blocking I/O source.
531 This variable conditionally defines the symbols EUNICE and VAX, which
532 alerts the C program that it must deal with ideosyncracies of VMS.
534 d_fchmod (d_fchmod.U):
535 This variable conditionally defines the HAS_FCHMOD symbol, which
536 indicates to the C program that the fchmod() routine is available
537 to change mode of opened files.
539 d_fchown (d_fchown.U):
540 This variable conditionally defines the HAS_FCHOWN symbol, which
541 indicates to the C program that the fchown() routine is available
542 to change ownership of opened files.
545 This variable conditionally defines the HAS_FCNTL symbol, and indicates
546 whether the fcntl() function exists
548 d_fcntl_can_lock (d_fcntl_can_lock.U):
549 This variable conditionally defines the FCNTL_CAN_LOCK symbol
550 and indicates whether file locking with fcntl() works.
552 d_fd_macros (d_fd_set.U):
553 This variable contains the eventual value of the HAS_FD_MACROS symbol,
554 which indicates if your C compiler knows about the macros which
555 manipulate an fd_set.
557 d_fd_set (d_fd_set.U):
558 This variable contains the eventual value of the HAS_FD_SET symbol,
559 which indicates if your C compiler knows about the fd_set typedef.
561 d_fds_bits (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FDS_BITS symbol,
563 which indicates if your fd_set typedef contains the fds_bits member.
564 If you have an fd_set typedef, but the dweebs who installed it did
565 a half-fast job and neglected to provide the macros to manipulate
566 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
568 d_fgetpos (d_fgetpos.U):
569 This variable conditionally defines HAS_FGETPOS if fgetpos() is
570 available to get the file position indicator.
572 d_flexfnam (d_flexfnam.U):
573 This variable conditionally defines the FLEXFILENAMES symbol, which
574 indicates that the system supports filenames longer than 14 characters.
577 This variable conditionally defines HAS_FLOCK if flock() is
578 available to do file locking.
581 This variable conditionally defines the HAS_FORK symbol, which
582 indicates to the C program that the fork() routine is available.
584 d_fpathconf (d_pathconf.U):
585 This variable conditionally defines the HAS_FPATHCONF symbol, which
586 indicates to the C program that the pathconf() routine is available
587 to determine file-system related limits and options associated
588 with a given open file descriptor.
590 d_fpos64_t (d_fpos64_t.U):
591 This symbol will be defined if the C compiler supports fpos64_t.
593 d_frexpl (d_frexpl.U):
594 This variable conditionally defines the HAS_FREXPL symbol, which
595 indicates to the C program that the frexpl() routine is available.
597 d_fs_data_s (d_fs_data_s.U):
598 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
599 which indicates that the struct fs_data is supported.
601 d_fseeko (d_fseeko.U):
602 This variable conditionally defines the HAS_FSEEKO symbol, which
603 indicates to the C program that the fseeko() routine is available.
605 d_fsetpos (d_fsetpos.U):
606 This variable conditionally defines HAS_FSETPOS if fsetpos() is
607 available to set the file position indicator.
609 d_fstatfs (d_fstatfs.U):
610 This variable conditionally defines the HAS_FSTATFS symbol, which
611 indicates to the C program that the fstatfs() routine is available.
613 d_fstatvfs (d_statvfs.U):
614 This variable conditionally defines the HAS_FSTATVFS symbol, which
615 indicates to the C program that the fstatvfs() routine is available.
618 This variable conditionally defines the HAS_FSYNC symbol, which
619 indicates to the C program that the fsync() routine is available.
621 d_ftello (d_ftello.U):
622 This variable conditionally defines the HAS_FTELLO symbol, which
623 indicates to the C program that the ftello() routine is available.
626 This variable conditionally defines the HAS_FTIME symbol, which indicates
627 that the ftime() routine exists. The ftime() routine is basically
628 a sub-second accuracy clock.
630 d_Gconvert (d_gconvert.U):
631 This variable holds what Gconvert is defined as to convert
632 floating point numbers into strings. It could be 'gconvert'
633 or a more complex macro emulating gconvert with gcvt() or sprintf.
635 d_Gconvert='gconvert((x),(n),(t),(b))'
636 d_Gconvert='gcvt((x),(n),(b))'
637 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
639 d_getcwd (d_getcwd.U):
640 This variable conditionally defines the HAS_GETCWD symbol, which
641 indicates to the C program that the getcwd() routine is available
642 to get the current working directory.
644 d_getespwnam (d_getespwnam.U):
645 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
646 available to retrieve enchanced (shadow) password entries by name.
648 d_getfsstat (d_getfsstat.U):
649 This variable conditionally defines the HAS_GETFSSTAT symbol, which
650 indicates to the C program that the getfsstat() routine is available.
652 d_getgrent (d_getgrent.U):
653 This variable conditionally defines the HAS_GETGRENT symbol, which
654 indicates to the C program that the getgrent() routine is available
655 for sequential access of the group database.
657 d_getgrps (d_getgrps.U):
658 This variable conditionally defines the HAS_GETGROUPS symbol, which
659 indicates to the C program that the getgroups() routine is available
660 to get the list of process groups.
662 d_gethbyaddr (d_gethbyad.U):
663 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
664 indicates to the C program that the gethostbyaddr() routine is available
665 to look up hosts by their IP addresses.
667 d_gethbyname (d_gethbynm.U):
668 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
669 indicates to the C program that the gethostbyname() routine is available
670 to look up host names in some data base or other.
672 d_gethent (d_gethent.U):
673 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
674 available to look up host names in some data base or another.
676 d_gethname (d_gethname.U):
677 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
678 indicates to the C program that the gethostname() routine may be
679 used to derive the host name.
681 d_gethostprotos (d_gethostprotos.U):
682 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
683 which indicates to the C program that <netdb.h> supplies
684 prototypes for the various gethost*() functions.
685 See also netdbtype.U for probing for various netdb types.
687 d_getlogin (d_getlogin.U):
688 This variable conditionally defines the HAS_GETLOGIN symbol, which
689 indicates to the C program that the getlogin() routine is available
690 to get the login name.
692 d_getmnt (d_getmnt.U):
693 This variable conditionally defines the HAS_GETMNT symbol, which
694 indicates to the C program that the getmnt() routine is available
695 to retrieve one or more mount info blocks by filename.
697 d_getmntent (d_getmntent.U):
698 This variable conditionally defines the HAS_GETMNTENT symbol, which
699 indicates to the C program that the getmntent() routine is available
700 to iterate through mounted files to get their mount info.
702 d_getnbyaddr (d_getnbyad.U):
703 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
704 indicates to the C program that the getnetbyaddr() routine is available
705 to look up networks by their IP addresses.
707 d_getnbyname (d_getnbynm.U):
708 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
709 indicates to the C program that the getnetbyname() routine is available
710 to look up networks by their names.
712 d_getnent (d_getnent.U):
713 This variable conditionally defines HAS_GETNETENT if getnetent() is
714 available to look up network names in some data base or another.
716 d_getnetprotos (d_getnetprotos.U):
717 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
718 which indicates to the C program that <netdb.h> supplies
719 prototypes for the various getnet*() functions.
720 See also netdbtype.U for probing for various netdb types.
722 d_getpagsz (d_getpagsz.U):
723 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
724 is available to get the system page size.
726 d_getpbyname (d_getprotby.U):
727 This variable conditionally defines the HAS_GETPROTOBYNAME
728 symbol, which indicates to the C program that the
729 getprotobyname() routine is available to look up protocols
732 d_getpbynumber (d_getprotby.U):
733 This variable conditionally defines the HAS_GETPROTOBYNUMBER
734 symbol, which indicates to the C program that the
735 getprotobynumber() routine is available to look up protocols
738 d_getpent (d_getpent.U):
739 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
740 available to look up protocols in some data base or another.
742 d_getpgid (d_getpgid.U):
743 This variable conditionally defines the HAS_GETPGID symbol, which
744 indicates to the C program that the getpgid(pid) function
745 is available to get the process group id.
747 d_getpgrp2 (d_getpgrp2.U):
748 This variable conditionally defines the HAS_GETPGRP2 symbol, which
749 indicates to the C program that the getpgrp2() (as in DG/UX) routine
750 is available to get the current process group.
752 d_getpgrp (d_getpgrp.U):
753 This variable conditionally defines HAS_GETPGRP if getpgrp() is
754 available to get the current process group.
756 d_getppid (d_getppid.U):
757 This variable conditionally defines the HAS_GETPPID symbol, which
758 indicates to the C program that the getppid() routine is available
759 to get the parent process ID.
761 d_getprior (d_getprior.U):
762 This variable conditionally defines HAS_GETPRIORITY if getpriority()
763 is available to get a process's priority.
765 d_getprotoprotos (d_getprotoprotos.U):
766 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
767 which indicates to the C program that <netdb.h> supplies
768 prototypes for the various getproto*() functions.
769 See also netdbtype.U for probing for various netdb types.
771 d_getprpwnam (d_getprpwnam.U):
772 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
773 available to retrieve protected (shadow) password entries by name.
775 d_getpwent (d_getpwent.U):
776 This variable conditionally defines the HAS_GETPWENT symbol, which
777 indicates to the C program that the getpwent() routine is available
778 for sequential access of the passwd database.
780 d_getsbyname (d_getsrvby.U):
781 This variable conditionally defines the HAS_GETSERVBYNAME
782 symbol, which indicates to the C program that the
783 getservbyname() routine is available to look up services
786 d_getsbyport (d_getsrvby.U):
787 This variable conditionally defines the HAS_GETSERVBYPORT
788 symbol, which indicates to the C program that the
789 getservbyport() routine is available to look up services
792 d_getsent (d_getsent.U):
793 This variable conditionally defines HAS_GETSERVENT if getservent() is
794 available to look up network services in some data base or another.
796 d_getservprotos (d_getservprotos.U):
797 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
798 which indicates to the C program that <netdb.h> supplies
799 prototypes for the various getserv*() functions.
800 See also netdbtype.U for probing for various netdb types.
802 d_getspnam (d_getspnam.U):
803 This variable conditionally defines HAS_GETSPNAM if getspnam() is
804 available to retrieve SysV shadow password entries by name.
806 d_gettimeod (d_ftime.U):
807 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
808 indicates that the gettimeofday() system call exists (to obtain a
809 sub-second accuracy clock). You should probably include <sys/resource.h>.
811 d_gnulibc (d_gnulibc.U):
812 Defined if we're dealing with the GNU C Library.
814 d_grpasswd (i_grp.U):
815 This variable conditionally defines GRPASSWD, which indicates
816 that struct group in <grp.h> contains gr_passwd.
818 d_hasmntopt (d_hasmntopt.U):
819 This variable conditionally defines the HAS_HASMNTOPT symbol, which
820 indicates to the C program that the hasmntopt() routine is available
821 to query the mount options of file systems.
824 This variable conditionally defines HAS_HTONL if htonl() and its
825 friends are available to do network order byte swapping.
828 This variable conditionally defines the HAS_ICONV symbol, which
829 indicates to the C program that the iconv() routine is available.
831 d_index (d_strchr.U):
832 This variable conditionally defines HAS_INDEX if index() and
833 rindex() are available for string searching.
835 d_inetaton (d_inetaton.U):
836 This variable conditionally defines the HAS_INET_ATON symbol, which
837 indicates to the C program that the inet_aton() function is available
838 to parse IP address "dotted-quad" strings.
840 d_int64_t (d_int64_t.U):
841 This symbol will be defined if the C compiler supports int64_t.
843 d_isascii (d_isascii.U):
844 This variable conditionally defines the HAS_ISASCII constant,
845 which indicates to the C program that isascii() is available.
848 This variable conditionally defines the HAS_ISNAN symbol, which
849 indicates to the C program that the isnan() routine is available.
851 d_isnanl (d_isnanl.U):
852 This variable conditionally defines the HAS_ISNANL symbol, which
853 indicates to the C program that the isnanl() routine is available.
855 d_killpg (d_killpg.U):
856 This variable conditionally defines the HAS_KILLPG symbol, which
857 indicates to the C program that the killpg() routine is available
858 to kill process groups.
860 d_lchown (d_lchown.U):
861 This variable conditionally defines the HAS_LCHOWN symbol, which
862 indicates to the C program that the lchown() routine is available
863 to operate on a symbolic link (instead of following the link).
865 d_ldbl_dig (d_ldbl_dig.U):
866 This variable conditionally defines d_ldbl_dig if this system's
867 header files provide LDBL_DIG, which is the number of significant
868 digits in a long double precision number.
871 This variable conditionally defines HAS_LINK if link() is
872 available to create hard links.
874 d_locconv (d_locconv.U):
875 This variable conditionally defines HAS_LOCALECONV if localeconv() is
876 available for numeric and monetary formatting conventions.
879 This variable conditionally defines HAS_LOCKF if lockf() is
880 available to do file locking.
882 d_longdbl (d_longdbl.U):
883 This variable conditionally defines HAS_LONG_DOUBLE if
884 the long double type is supported.
886 d_longlong (d_longlong.U):
887 This variable conditionally defines HAS_LONG_LONG if
888 the long long type is supported.
890 d_lseekproto (d_lseekproto.U):
891 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
892 which indicates to the C program that the system provides
893 a prototype for the lseek() function. Otherwise, it is
894 up to the program to supply one.
897 This variable conditionally defines HAS_LSTAT if lstat() is
898 available to do file stats on symbolic links.
900 d_madvise (d_madvise.U):
901 This variable conditionally defines HAS_MADVISE if madvise() is
902 available to map a file into memory.
905 This variable conditionally defines the HAS_MBLEN symbol, which
906 indicates to the C program that the mblen() routine is available
907 to find the number of bytes in a multibye character.
909 d_mbstowcs (d_mbstowcs.U):
910 This variable conditionally defines the HAS_MBSTOWCS symbol, which
911 indicates to the C program that the mbstowcs() routine is available
912 to convert a multibyte string into a wide character string.
914 d_mbtowc (d_mbtowc.U):
915 This variable conditionally defines the HAS_MBTOWC symbol, which
916 indicates to the C program that the mbtowc() routine is available
917 to convert multibyte to a wide character.
919 d_memchr (d_memchr.U):
920 This variable conditionally defines the HAS_MEMCHR symbol, which
921 indicates to the C program that the memchr() routine is available
922 to locate characters within a C string.
924 d_memcmp (d_memcmp.U):
925 This variable conditionally defines the HAS_MEMCMP symbol, which
926 indicates to the C program that the memcmp() routine is available
927 to compare blocks of memory.
929 d_memcpy (d_memcpy.U):
930 This variable conditionally defines the HAS_MEMCPY symbol, which
931 indicates to the C program that the memcpy() routine is available
932 to copy blocks of memory.
934 d_memmove (d_memmove.U):
935 This variable conditionally defines the HAS_MEMMOVE symbol, which
936 indicates to the C program that the memmove() routine is available
937 to copy potentatially overlapping blocks of memory.
939 d_memset (d_memset.U):
940 This variable conditionally defines the HAS_MEMSET symbol, which
941 indicates to the C program that the memset() routine is available
942 to set blocks of memory.
945 This variable conditionally defines the HAS_MKDIR symbol, which
946 indicates to the C program that the mkdir() routine is available
947 to create directories..
949 d_mkdtemp (d_mkdtemp.U):
950 This variable conditionally defines the HAS_MKDTEMP symbol, which
951 indicates to the C program that the mkdtemp() routine is available
952 to exclusively create a uniquely named temporary directory.
954 d_mkfifo (d_mkfifo.U):
955 This variable conditionally defines the HAS_MKFIFO symbol, which
956 indicates to the C program that the mkfifo() routine is available.
958 d_mkstemp (d_mkstemp.U):
959 This variable conditionally defines the HAS_MKSTEMP symbol, which
960 indicates to the C program that the mkstemp() routine is available
961 to exclusively create and open a uniquely named temporary file.
963 d_mkstemps (d_mkstemps.U):
964 This variable conditionally defines the HAS_MKSTEMPS symbol, which
965 indicates to the C program that the mkstemps() routine is available
966 to exclusively create and open a uniquely named (with a suffix)
969 d_mktime (d_mktime.U):
970 This variable conditionally defines the HAS_MKTIME symbol, which
971 indicates to the C program that the mktime() routine is available.
974 This variable conditionally defines HAS_MMAP if mmap() is
975 available to map a file into memory.
978 This variable conditionally defines the HAS_MODFL symbol, which
979 indicates to the C program that the modfl() routine is available.
981 d_mprotect (d_mprotect.U):
982 This variable conditionally defines HAS_MPROTECT if mprotect() is
983 available to modify the access protection of a memory mapped file.
986 This variable conditionally defines the HAS_MSG symbol, which
987 indicates that the entire msg*(2) library is present.
989 d_msg_ctrunc (d_socket.U):
990 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
991 which indicates that the MSG_CTRUNC is available. #ifdef is
992 not enough because it may be an enum, glibc has been known to do this.
994 d_msg_dontroute (d_socket.U):
995 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
996 which indicates that the MSG_DONTROUTE is available. #ifdef is
997 not enough because it may be an enum, glibc has been known to do this.
999 d_msg_oob (d_socket.U):
1000 This variable conditionally defines the HAS_MSG_OOB symbol,
1001 which indicates that the MSG_OOB is available. #ifdef is
1002 not enough because it may be an enum, glibc has been known to do this.
1004 d_msg_peek (d_socket.U):
1005 This variable conditionally defines the HAS_MSG_PEEK symbol,
1006 which indicates that the MSG_PEEK is available. #ifdef is
1007 not enough because it may be an enum, glibc has been known to do this.
1009 d_msg_proxy (d_socket.U):
1010 This variable conditionally defines the HAS_MSG_PROXY symbol,
1011 which indicates that the MSG_PROXY is available. #ifdef is
1012 not enough because it may be an enum, glibc has been known to do this.
1014 d_msgctl (d_msgctl.U):
1015 This variable conditionally defines the HAS_MSGCTL symbol, which
1016 indicates to the C program that the msgctl() routine is available.
1018 d_msgget (d_msgget.U):
1019 This variable conditionally defines the HAS_MSGGET symbol, which
1020 indicates to the C program that the msgget() routine is available.
1022 d_msgrcv (d_msgrcv.U):
1023 This variable conditionally defines the HAS_MSGRCV symbol, which
1024 indicates to the C program that the msgrcv() routine is available.
1026 d_msgsnd (d_msgsnd.U):
1027 This variable conditionally defines the HAS_MSGSND symbol, which
1028 indicates to the C program that the msgsnd() routine is available.
1030 d_msync (d_msync.U):
1031 This variable conditionally defines HAS_MSYNC if msync() is
1032 available to synchronize a mapped file.
1034 d_munmap (d_munmap.U):
1035 This variable conditionally defines HAS_MUNMAP if munmap() is
1036 available to unmap a region mapped by mmap().
1038 d_mymalloc (mallocsrc.U):
1039 This variable conditionally defines MYMALLOC in case other parts
1040 of the source want to take special action if MYMALLOC is used.
1041 This may include different sorts of profiling or error detection.
1044 This variable conditionally defines the HAS_NICE symbol, which
1045 indicates to the C program that the nice() routine is available.
1047 d_nv_preserves_uv (perlxv.U):
1048 This variable indicates whether a variable of type nvtype
1049 can preserve all the bits a variable of type uvtype.
1051 d_nv_preserves_uv_bits (perlxv.U):
1052 This variable indicates how many of bits type uvtype
1053 a variable nvtype can preserve.
1055 d_off64_t (d_off64_t.U):
1056 This symbol will be defined if the C compiler supports off64_t.
1058 d_old_pthread_create_joinable (d_pthrattrj.U):
1059 This variable conditionally defines pthread_create_joinable.
1060 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1062 d_oldpthreads (usethreads.U):
1063 This variable conditionally defines the OLD_PTHREADS_API symbol,
1064 and indicates that Perl should be built to use the old
1065 draft POSIX threads API. This is only potentially meaningful if
1068 d_oldsock (d_socket.U):
1069 This variable conditionally defines the OLDSOCKET symbol, which
1070 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1072 d_open3 (d_open3.U):
1073 This variable conditionally defines the HAS_OPEN3 manifest constant,
1074 which indicates to the C program that the 3 argument version of
1075 the open(2) function is available.
1077 d_pathconf (d_pathconf.U):
1078 This variable conditionally defines the HAS_PATHCONF symbol, which
1079 indicates to the C program that the pathconf() routine is available
1080 to determine file-system related limits and options associated
1081 with a given filename.
1083 d_pause (d_pause.U):
1084 This variable conditionally defines the HAS_PAUSE symbol, which
1085 indicates to the C program that the pause() routine is available
1086 to suspend a process until a signal is received.
1088 d_perl_otherlibdirs (otherlibdirs.U):
1089 This variable conditionally defines PERL_OTHERLIBDIRS, which
1090 contains a colon-separated set of paths for the perl binary to
1091 include in @INC. See also otherlibdirs.
1093 d_phostname (d_gethname.U):
1094 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1095 contains the shell command which, when fed to popen(), may be
1096 used to derive the host name.
1099 This variable conditionally defines the HAS_PIPE symbol, which
1100 indicates to the C program that the pipe() routine is available
1101 to create an inter-process channel.
1104 This variable conditionally defines the HAS_POLL symbol, which
1105 indicates to the C program that the poll() routine is available
1106 to poll active file descriptors.
1108 d_portable (d_portable.U):
1109 This variable conditionally defines the PORTABLE symbol, which
1110 indicates to the C program that it should not assume that it is
1111 running on the machine it was compiled on.
1113 d_PRId64 (quadfio.U):
1114 This variable conditionally defines the PERL_PRId64 symbol, which
1115 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1117 d_PRIeldbl (longdblfio.U):
1118 This variable conditionally defines the PERL_PRIfldbl symbol, which
1119 indiciates that stdio has a symbol to print long doubles.
1121 d_PRIEUldbl (longdblfio.U):
1122 This variable conditionally defines the PERL_PRIfldbl symbol, which
1123 indiciates that stdio has a symbol to print long doubles.
1124 The 'U' in the name is to separate this from d_PRIeldbl so that even
1125 case-blind systems can see the difference.
1127 d_PRIfldbl (longdblfio.U):
1128 This variable conditionally defines the PERL_PRIfldbl symbol, which
1129 indiciates that stdio has a symbol to print long doubles.
1131 d_PRIFUldbl (longdblfio.U):
1132 This variable conditionally defines the PERL_PRIfldbl symbol, which
1133 indiciates that stdio has a symbol to print long doubles.
1134 The 'U' in the name is to separate this from d_PRIfldbl so that even
1135 case-blind systems can see the difference.
1137 d_PRIgldbl (longdblfio.U):
1138 This variable conditionally defines the PERL_PRIfldbl symbol, which
1139 indiciates that stdio has a symbol to print long doubles.
1141 d_PRIGUldbl (longdblfio.U):
1142 This variable conditionally defines the PERL_PRIfldbl symbol, which
1143 indiciates that stdio has a symbol to print long doubles.
1144 The 'U' in the name is to separate this from d_PRIgldbl so that even
1145 case-blind systems can see the difference.
1147 d_PRIi64 (quadfio.U):
1148 This variable conditionally defines the PERL_PRIi64 symbol, which
1149 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1151 d_PRIo64 (quadfio.U):
1152 This variable conditionally defines the PERL_PRIo64 symbol, which
1153 indiciates that stdio has a symbol to print 64-bit octal numbers.
1155 d_PRIu64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRIu64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1160 d_PRIx64 (quadfio.U):
1161 This variable conditionally defines the PERL_PRIx64 symbol, which
1162 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1164 d_PRIXU64 (quadfio.U):
1165 This variable conditionally defines the PERL_PRIXU64 symbol, which
1166 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1167 The 'U' in the name is to separate this from d_PRIx64 so that even
1168 case-blind systems can see the difference.
1170 d_pthread_yield (d_pthread_y.U):
1171 This variable conditionally defines the HAS_PTHREAD_YIELD
1172 symbol if the pthread_yield routine is available to yield
1173 the execution of the current thread.
1176 This variable conditionally defines PWAGE, which indicates
1177 that struct passwd contains pw_age.
1179 d_pwchange (i_pwd.U):
1180 This variable conditionally defines PWCHANGE, which indicates
1181 that struct passwd contains pw_change.
1183 d_pwclass (i_pwd.U):
1184 This variable conditionally defines PWCLASS, which indicates
1185 that struct passwd contains pw_class.
1187 d_pwcomment (i_pwd.U):
1188 This variable conditionally defines PWCOMMENT, which indicates
1189 that struct passwd contains pw_comment.
1191 d_pwexpire (i_pwd.U):
1192 This variable conditionally defines PWEXPIRE, which indicates
1193 that struct passwd contains pw_expire.
1195 d_pwgecos (i_pwd.U):
1196 This variable conditionally defines PWGECOS, which indicates
1197 that struct passwd contains pw_gecos.
1199 d_pwpasswd (i_pwd.U):
1200 This variable conditionally defines PWPASSWD, which indicates
1201 that struct passwd contains pw_passwd.
1203 d_pwquota (i_pwd.U):
1204 This variable conditionally defines PWQUOTA, which indicates
1205 that struct passwd contains pw_quota.
1207 d_qgcvt (d_qgcvt.U):
1208 This variable conditionally defines the HAS_QGCVT symbol, which
1209 indicates to the C program that the qgcvt() routine is available.
1211 d_quad (quadtype.U):
1212 This variable, if defined, tells that there's a 64-bit integer type,
1215 d_readdir (d_readdir.U):
1216 This variable conditionally defines HAS_READDIR if readdir() is
1217 available to read directory entries.
1219 d_readlink (d_readlink.U):
1220 This variable conditionally defines the HAS_READLINK symbol, which
1221 indicates to the C program that the readlink() routine is available
1222 to read the value of a symbolic link.
1224 d_rename (d_rename.U):
1225 This variable conditionally defines the HAS_RENAME symbol, which
1226 indicates to the C program that the rename() routine is available
1229 d_rewinddir (d_readdir.U):
1230 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1233 d_rmdir (d_rmdir.U):
1234 This variable conditionally defines HAS_RMDIR if rmdir() is
1235 available to remove directories.
1237 d_safebcpy (d_safebcpy.U):
1238 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1239 the bcopy() routine can do overlapping copies.
1241 d_safemcpy (d_safemcpy.U):
1242 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1243 the memcpy() routine can do overlapping copies.
1245 d_sanemcmp (d_sanemcmp.U):
1246 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1247 the memcpy() routine is available and can be used to compare relative
1248 magnitudes of chars with their high bits set.
1250 d_sched_yield (d_pthread_y.U):
1251 This variable conditionally defines the HAS_SCHED_YIELD
1252 symbol if the sched_yield routine is available to yield
1253 the execution of the current thread.
1255 d_scm_rights (d_socket.U):
1256 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1257 which indicates that the SCM_RIGHTS is available. #ifdef is
1258 not enough because it may be an enum, glibc has been known to do this.
1260 d_SCNfldbl (longdblfio.U):
1261 This variable conditionally defines the PERL_PRIfldbl symbol, which
1262 indiciates that stdio has a symbol to scan long doubles.
1264 d_seekdir (d_readdir.U):
1265 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1268 d_select (d_select.U):
1269 This variable conditionally defines HAS_SELECT if select() is
1270 available to select active file descriptors. A <sys/time.h>
1271 inclusion may be necessary for the timeout field.
1274 This variable conditionally defines the HAS_SEM symbol, which
1275 indicates that the entire sem*(2) library is present.
1277 d_semctl (d_semctl.U):
1278 This variable conditionally defines the HAS_SEMCTL symbol, which
1279 indicates to the C program that the semctl() routine is available.
1281 d_semctl_semid_ds (d_union_semun.U):
1282 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1283 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1285 d_semctl_semun (d_union_semun.U):
1286 This variable conditionally defines USE_SEMCTL_SEMUN, which
1287 indicates that union semun is to be used for semctl IPC_STAT.
1289 d_semget (d_semget.U):
1290 This variable conditionally defines the HAS_SEMGET symbol, which
1291 indicates to the C program that the semget() routine is available.
1293 d_semop (d_semop.U):
1294 This variable conditionally defines the HAS_SEMOP symbol, which
1295 indicates to the C program that the semop() routine is available.
1297 d_setegid (d_setegid.U):
1298 This variable conditionally defines the HAS_SETEGID symbol, which
1299 indicates to the C program that the setegid() routine is available
1300 to change the effective gid of the current program.
1302 d_seteuid (d_seteuid.U):
1303 This variable conditionally defines the HAS_SETEUID symbol, which
1304 indicates to the C program that the seteuid() routine is available
1305 to change the effective uid of the current program.
1307 d_setgrent (d_setgrent.U):
1308 This variable conditionally defines the HAS_SETGRENT symbol, which
1309 indicates to the C program that the setgrent() routine is available
1310 for initializing sequential access to the group database.
1312 d_setgrps (d_setgrps.U):
1313 This variable conditionally defines the HAS_SETGROUPS symbol, which
1314 indicates to the C program that the setgroups() routine is available
1315 to set the list of process groups.
1317 d_sethent (d_sethent.U):
1318 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1321 d_setlinebuf (d_setlnbuf.U):
1322 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1323 indicates to the C program that the setlinebuf() routine is available
1324 to change stderr or stdout from block-buffered or unbuffered to a
1327 d_setlocale (d_setlocale.U):
1328 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1329 available to handle locale-specific ctype implementations.
1331 d_setnent (d_setnent.U):
1332 This variable conditionally defines HAS_SETNETENT if setnetent() is
1335 d_setpent (d_setpent.U):
1336 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1339 d_setpgid (d_setpgid.U):
1340 This variable conditionally defines the HAS_SETPGID symbol if the
1341 setpgid(pid, gpid) function is available to set process group ID.
1343 d_setpgrp2 (d_setpgrp2.U):
1344 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1345 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1346 is available to set the current process group.
1348 d_setpgrp (d_setpgrp.U):
1349 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1350 available to set the current process group.
1352 d_setprior (d_setprior.U):
1353 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1354 is available to set a process's priority.
1356 d_setproctitle (d_setproctitle.U):
1357 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1358 which indicates to the C program that the setproctitle() routine
1361 d_setpwent (d_setpwent.U):
1362 This variable conditionally defines the HAS_SETPWENT symbol, which
1363 indicates to the C program that the setpwent() routine is available
1364 for initializing sequential access to the passwd database.
1366 d_setregid (d_setregid.U):
1367 This variable conditionally defines HAS_SETREGID if setregid() is
1368 available to change the real and effective gid of the current
1371 d_setresgid (d_setregid.U):
1372 This variable conditionally defines HAS_SETRESGID if setresgid() is
1373 available to change the real, effective and saved gid of the current
1376 d_setresuid (d_setreuid.U):
1377 This variable conditionally defines HAS_SETREUID if setresuid() is
1378 available to change the real, effective and saved uid of the current
1381 d_setreuid (d_setreuid.U):
1382 This variable conditionally defines HAS_SETREUID if setreuid() is
1383 available to change the real and effective uid of the current
1386 d_setrgid (d_setrgid.U):
1387 This variable conditionally defines the HAS_SETRGID symbol, which
1388 indicates to the C program that the setrgid() routine is available
1389 to change the real gid of the current program.
1391 d_setruid (d_setruid.U):
1392 This variable conditionally defines the HAS_SETRUID symbol, which
1393 indicates to the C program that the setruid() routine is available
1394 to change the real uid of the current program.
1396 d_setsent (d_setsent.U):
1397 This variable conditionally defines HAS_SETSERVENT if setservent() is
1400 d_setsid (d_setsid.U):
1401 This variable conditionally defines HAS_SETSID if setsid() is
1402 available to set the process group ID.
1404 d_setvbuf (d_setvbuf.U):
1405 This variable conditionally defines the HAS_SETVBUF symbol, which
1406 indicates to the C program that the setvbuf() routine is available
1407 to change buffering on an open stdio stream.
1410 This variable conditionally defines the USE_SFIO symbol,
1411 and indicates whether sfio is available (and should be used).
1414 This variable conditionally defines the HAS_SHM symbol, which
1415 indicates that the entire shm*(2) library is present.
1417 d_shmat (d_shmat.U):
1418 This variable conditionally defines the HAS_SHMAT symbol, which
1419 indicates to the C program that the shmat() routine is available.
1421 d_shmatprototype (d_shmat.U):
1422 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1423 symbol, which indicates that sys/shm.h has a prototype for
1426 d_shmctl (d_shmctl.U):
1427 This variable conditionally defines the HAS_SHMCTL symbol, which
1428 indicates to the C program that the shmctl() routine is available.
1430 d_shmdt (d_shmdt.U):
1431 This variable conditionally defines the HAS_SHMDT symbol, which
1432 indicates to the C program that the shmdt() routine is available.
1434 d_shmget (d_shmget.U):
1435 This variable conditionally defines the HAS_SHMGET symbol, which
1436 indicates to the C program that the shmget() routine is available.
1438 d_sigaction (d_sigaction.U):
1439 This variable conditionally defines the HAS_SIGACTION symbol, which
1440 indicates that the Vr4 sigaction() routine is available.
1442 d_sigsetjmp (d_sigsetjmp.U):
1443 This variable conditionally defines the HAS_SIGSETJMP symbol,
1444 which indicates that the sigsetjmp() routine is available to
1445 call setjmp() and optionally save the process's signal mask.
1447 d_socket (d_socket.U):
1448 This variable conditionally defines HAS_SOCKET, which indicates
1449 that the BSD socket interface is supported.
1451 d_socklen_t (d_socklen_t.U):
1452 This symbol will be defined if the C compiler supports socklen_t.
1454 d_sockpair (d_socket.U):
1455 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1456 indicates that the BSD socketpair() is supported.
1458 d_socks5_init (d_socks5_init.U):
1459 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1460 indicates to the C program that the socks5_init() routine is available.
1462 d_sqrtl (d_sqrtl.U):
1463 This variable conditionally defines the HAS_SQRTL symbol, which
1464 indicates to the C program that the sqrtl() routine is available.
1466 d_statblks (d_statblks.U):
1467 This variable conditionally defines USE_STAT_BLOCKS
1468 if this system has a stat structure declaring
1469 st_blksize and st_blocks.
1471 d_statfs_f_flags (d_statfs_f_flags.U):
1472 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1473 symbol, which indicates to struct statfs from has f_flags member.
1474 This kind of struct statfs is coming from sys/mount.h (BSD),
1475 not from sys/statfs.h (SYSV).
1477 d_statfs_s (d_statfs_s.U):
1478 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1479 which indicates that the struct statfs is supported.
1481 d_statvfs (d_statvfs.U):
1482 This variable conditionally defines the HAS_STATVFS symbol, which
1483 indicates to the C program that the statvfs() routine is available.
1485 d_stdio_cnt_lval (d_stdstdio.U):
1486 This variable conditionally defines STDIO_CNT_LVALUE if the
1487 FILE_cnt macro can be used as an lvalue.
1489 d_stdio_ptr_lval (d_stdstdio.U):
1490 This variable conditionally defines STDIO_PTR_LVALUE if the
1491 FILE_ptr macro can be used as an lvalue.
1493 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1494 This symbol is defined if using the FILE_ptr macro as an lvalue
1495 to increase the pointer by n leaves File_cnt(fp) unchanged.
1497 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1498 This symbol is defined if using the FILE_ptr macro as an lvalue
1499 to increase the pointer by n has the side effect of decreasing the
1500 value of File_cnt(fp) by n.
1502 d_stdio_stream_array (stdio_streams.U):
1503 This variable tells whether there is an array holding
1506 d_stdiobase (d_stdstdio.U):
1507 This variable conditionally defines USE_STDIO_BASE if this system
1508 has a FILE structure declaring a usable _base field (or equivalent)
1511 d_stdstdio (d_stdstdio.U):
1512 This variable conditionally defines USE_STDIO_PTR if this system
1513 has a FILE structure declaring usable _ptr and _cnt fields (or
1514 equivalent) in stdio.h.
1516 d_strchr (d_strchr.U):
1517 This variable conditionally defines HAS_STRCHR if strchr() and
1518 strrchr() are available for string searching.
1520 d_strcoll (d_strcoll.U):
1521 This variable conditionally defines HAS_STRCOLL if strcoll() is
1522 available to compare strings using collating information.
1524 d_strctcpy (d_strctcpy.U):
1525 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1526 indicates to the C program that this C compiler knows how to copy
1529 d_strerrm (d_strerror.U):
1530 This variable holds what Strerrr is defined as to translate an error
1531 code condition into an error message string. It could be 'strerror'
1532 or a more complex macro emulating strrror with sys_errlist[], or the
1533 "unknown" string when both strerror and sys_errlist are missing.
1535 d_strerror (d_strerror.U):
1536 This variable conditionally defines HAS_STRERROR if strerror() is
1537 available to translate error numbers to strings.
1539 d_strtod (d_strtod.U):
1540 This variable conditionally defines the HAS_STRTOD symbol, which
1541 indicates to the C program that the strtod() routine is available
1542 to provide better numeric string conversion than atof().
1544 d_strtol (d_strtol.U):
1545 This variable conditionally defines the HAS_STRTOL symbol, which
1546 indicates to the C program that the strtol() routine is available
1547 to provide better numeric string conversion than atoi() and friends.
1549 d_strtold (d_strtold.U):
1550 This variable conditionally defines the HAS_STRTOLD symbol, which
1551 indicates to the C program that the strtold() routine is available.
1553 d_strtoll (d_strtoll.U):
1554 This variable conditionally defines the HAS_STRTOLL symbol, which
1555 indicates to the C program that the strtoll() routine is available.
1557 d_strtoul (d_strtoul.U):
1558 This variable conditionally defines the HAS_STRTOUL symbol, which
1559 indicates to the C program that the strtoul() routine is available
1560 to provide conversion of strings to unsigned long.
1562 d_strtoull (d_strtoull.U):
1563 This variable conditionally defines the HAS_STRTOULL symbol, which
1564 indicates to the C program that the strtoull() routine is available.
1566 d_strtouq (d_strtouq.U):
1567 This variable conditionally defines the HAS_STRTOUQ symbol, which
1568 indicates to the C program that the strtouq() routine is available.
1570 d_strxfrm (d_strxfrm.U):
1571 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1572 available to transform strings.
1574 d_suidsafe (d_dosuid.U):
1575 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1576 if setuid scripts can be secure. This test looks in /dev/fd/.
1578 d_symlink (d_symlink.U):
1579 This variable conditionally defines the HAS_SYMLINK symbol, which
1580 indicates to the C program that the symlink() routine is available
1581 to create symbolic links.
1583 d_syscall (d_syscall.U):
1584 This variable conditionally defines HAS_SYSCALL if syscall() is
1585 available call arbitrary system calls.
1587 d_sysconf (d_sysconf.U):
1588 This variable conditionally defines the HAS_SYSCONF symbol, which
1589 indicates to the C program that the sysconf() routine is available
1590 to determine system related limits and options.
1592 d_sysernlst (d_strerror.U):
1593 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1594 is available to translate error numbers to the symbolic name.
1596 d_syserrlst (d_strerror.U):
1597 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1598 available to translate error numbers to strings.
1600 d_system (d_system.U):
1601 This variable conditionally defines HAS_SYSTEM if system() is
1602 available to issue a shell command.
1604 d_tcgetpgrp (d_tcgtpgrp.U):
1605 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1606 indicates to the C program that the tcgetpgrp() routine is available.
1607 to get foreground process group ID.
1609 d_tcsetpgrp (d_tcstpgrp.U):
1610 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1611 indicates to the C program that the tcsetpgrp() routine is available
1612 to set foreground process group ID.
1614 d_telldir (d_readdir.U):
1615 This variable conditionally defines HAS_TELLDIR if telldir() is
1618 d_telldirproto (d_telldirproto.U):
1619 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1620 which indicates to the C program that the system provides
1621 a prototype for the telldir() function. Otherwise, it is
1622 up to the program to supply one.
1625 This variable conditionally defines the HAS_TIME symbol, which indicates
1626 that the time() routine exists. The time() routine is normaly
1627 provided on UNIX systems.
1629 d_times (d_times.U):
1630 This variable conditionally defines the HAS_TIMES symbol, which indicates
1631 that the times() routine exists. The times() routine is normaly
1632 provided on UNIX systems. You may have to include <sys/times.h>.
1634 d_truncate (d_truncate.U):
1635 This variable conditionally defines HAS_TRUNCATE if truncate() is
1636 available to truncate files.
1638 d_tzname (d_tzname.U):
1639 This variable conditionally defines HAS_TZNAME if tzname[] is
1640 available to access timezone names.
1642 d_umask (d_umask.U):
1643 This variable conditionally defines the HAS_UMASK symbol, which
1644 indicates to the C program that the umask() routine is available.
1645 to set and get the value of the file creation mask.
1647 d_uname (d_gethname.U):
1648 This variable conditionally defines the HAS_UNAME symbol, which
1649 indicates to the C program that the uname() routine may be
1650 used to derive the host name.
1652 d_union_semun (d_union_semun.U):
1653 This variable conditionally defines HAS_UNION_SEMUN if the
1654 union semun is defined by including <sys/sem.h>.
1656 d_ustat (d_ustat.U):
1657 This variable conditionally defines HAS_USTAT if ustat() is
1658 available to query file system statistics by dev_t.
1660 d_vendorarch (vendorarch.U):
1661 This variable conditionally defined PERL_VENDORARCH.
1663 d_vendorbin (vendorbin.U):
1664 This variable conditionally defines PERL_VENDORBIN.
1666 d_vendorlib (vendorlib.U):
1667 This variable conditionally defines PERL_VENDORLIB.
1669 d_vfork (d_vfork.U):
1670 This variable conditionally defines the HAS_VFORK symbol, which
1671 indicates the vfork() routine is available.
1673 d_void_closedir (d_closedir.U):
1674 This variable conditionally defines VOID_CLOSEDIR if closedir()
1675 does not return a value.
1677 d_voidsig (d_voidsig.U):
1678 This variable conditionally defines VOIDSIG if this system
1679 declares "void (*signal(...))()" in signal.h. The old way was to
1680 declare it as "int (*signal(...))()".
1682 d_voidtty (i_sysioctl.U):
1683 This variable conditionally defines USE_IOCNOTTY to indicate that the
1684 ioctl() call with TIOCNOTTY should be used to void tty association.
1685 Otherwise (on USG probably), it is enough to close the standard file
1686 decriptors and do a setpgrp().
1688 d_volatile (d_volatile.U):
1689 This variable conditionally defines the HASVOLATILE symbol, which
1690 indicates to the C program that this C compiler knows about the
1691 volatile declaration.
1693 d_vprintf (d_vprintf.U):
1694 This variable conditionally defines the HAS_VPRINTF symbol, which
1695 indicates to the C program that the vprintf() routine is available
1696 to printf with a pointer to an argument list.
1698 d_wait4 (d_wait4.U):
1699 This variable conditionally defines the HAS_WAIT4 symbol, which
1700 indicates the wait4() routine is available.
1702 d_waitpid (d_waitpid.U):
1703 This variable conditionally defines HAS_WAITPID if waitpid() is
1704 available to wait for child process.
1706 d_wcstombs (d_wcstombs.U):
1707 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1708 indicates to the C program that the wcstombs() routine is available
1709 to convert wide character strings to multibyte strings.
1711 d_wctomb (d_wctomb.U):
1712 This variable conditionally defines the HAS_WCTOMB symbol, which
1713 indicates to the C program that the wctomb() routine is available
1714 to convert a wide character to a multibyte.
1717 This variable conditionally defines the symbol XENIX, which alerts
1718 the C program that it runs under Xenix.
1721 This variable is used internally by Configure to determine the
1722 full pathname (if any) of the date program. After Configure runs,
1723 the value is reset to a plain "date" and is not useful.
1725 db_hashtype (i_db.U):
1726 This variable contains the type of the hash structure element
1727 in the <db.h> header file. In older versions of DB, it was
1728 int, while in newer ones it is u_int32_t.
1730 db_prefixtype (i_db.U):
1731 This variable contains the type of the prefix structure element
1732 in the <db.h> header file. In older versions of DB, it was
1733 int, while in newer ones it is size_t.
1735 defvoidused (voidflags.U):
1736 This variable contains the default value of the VOIDUSED symbol (15).
1738 direntrytype (i_dirent.U):
1739 This symbol is set to 'struct direct' or 'struct dirent' depending on
1740 whether dirent is available or not. You should use this pseudo type to
1741 portably declare your directory entries.
1744 This variable contains the extension that is to be used for the
1745 dynamically loaded modules that perl generaties.
1748 This variable contains the name of the dynamic loading file that
1749 will be used with the package.
1751 doublesize (doublesize.U):
1752 This variable contains the value of the DOUBLESIZE symbol, which
1753 indicates to the C program how many bytes there are in a double.
1755 drand01 (randfunc.U):
1756 Indicates the macro to be used to generate normalized
1757 random numbers. Uses randfunc, often divided by
1758 (double) (((unsigned long) 1 << randbits)) in order to
1759 normalize the result.
1760 In C programs, the macro 'Drand01' is mapped to drand01.
1762 dynamic_ext (Extensions.U):
1763 This variable holds a list of XS extension files we want to
1764 link dynamically into the package. It is used by Makefile.
1766 eagain (nblock_io.U):
1767 This variable bears the symbolic errno code set by read() when no
1768 data is present on the file and non-blocking I/O was enabled (otherwise,
1769 read() blocks naturally).
1772 This variable conditionally defines EBCDIC if this
1773 system uses EBCDIC encoding. Among other things, this
1774 means that the character ranges are not contiguous.
1778 This variable is used internally by Configure to determine the
1779 full pathname (if any) of the echo program. After Configure runs,
1780 the value is reset to a plain "echo" and is not useful.
1783 This variable is used internally by Configure to determine the
1784 full pathname (if any) of the egrep program. After Configure runs,
1785 the value is reset to a plain "egrep" and is not useful.
1788 This variable is defined but not used by Configure.
1789 The value is a plain '' and is not useful.
1792 When running under Eunice this variable contains a command which will
1793 convert a shell script to the proper form of text file for it to be
1794 executable by the shell. On other systems it is a no-op.
1797 This is an old synonym for _exe.
1800 This variable is used internally by Configure to determine the
1801 full pathname (if any) of the expr program. After Configure runs,
1802 the value is reset to a plain "expr" and is not useful.
1804 extensions (Extensions.U):
1805 This variable holds a list of all extension files (both XS and
1806 non-xs linked into the package. It is propagated to Config.pm
1807 and is typically used to test whether a particular extesion
1810 fflushall (fflushall.U):
1811 This symbol, if defined, tells that to flush
1812 all pending stdio output one must loop through all
1813 the stdio file handles stored in an array and fflush them.
1814 Note that if fflushNULL is defined, fflushall will not
1815 even be probed for and will be left undefined.
1817 fflushNULL (fflushall.U):
1818 This symbol, if defined, tells that fflush(NULL) does flush
1819 all pending stdio output.
1822 This variable is defined but not used by Configure.
1823 The value is a plain '' and is not useful.
1825 firstmakefile (Unix.U):
1826 This variable defines the first file searched by make. On unix,
1827 it is makefile (then Makefile). On case-insensitive systems,
1828 it might be something else. This is only used to deal with
1829 convoluted make depend tricks.
1832 This variable is defined but not used by Configure.
1833 The value is a plain '' and is not useful.
1835 fpossize (fpossize.U):
1836 This variable contains the size of a fpostype in bytes.
1838 fpostype (fpostype.U):
1839 This variable defines Fpos_t to be something like fpos_t, long,
1840 uint, or whatever type is used to declare file positions in libc.
1842 freetype (mallocsrc.U):
1843 This variable contains the return type of free(). It is usually
1844 void, but occasionally int.
1847 This variable contains the full pathname to 'ar', whether or
1848 not the user has specified 'portability'. This is only used
1852 This variable contains the full pathname to 'csh', whether or
1853 not the user has specified 'portability'. This is only used
1854 in the compiled C program, and we assume that all systems which
1855 can share this executable will have the same full pathname to
1858 full_sed (Loc_sed.U):
1859 This variable contains the full pathname to 'sed', whether or
1860 not the user has specified 'portability'. This is only used
1861 in the compiled C program, and we assume that all systems which
1862 can share this executable will have the same full pathname to
1865 gccosandvers (gccvers.U):
1866 If GNU cc (gcc) is used, this variable the operating system and
1867 version used to compile the gcc. It is set to '' if not gcc,
1868 or if nothing useful can be parsed as the os version.
1870 gccversion (gccvers.U):
1871 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1872 indicate whether the compiler is version 1 or 2. This is used in
1873 setting some of the default cflags. It is set to '' if not gcc.
1876 This variable contains the format string used for printing a Gid_t.
1878 gidsign (gidsign.U):
1879 This variable contains the signedness of a gidtype.
1880 1 for unsigned, -1 for signed.
1882 gidsize (gidsize.U):
1883 This variable contains the size of a gidtype in bytes.
1885 gidtype (gidtype.U):
1886 This variable defines Gid_t to be something like gid_t, int,
1887 ushort, or whatever type is used to declare the return type
1888 of getgid(). Typically, it is the type of group ids in the kernel.
1891 This variable holds the general path (space-separated) used to
1892 find libraries. It may contain directories that do not exist on
1893 this platform, libpth is the cleaned-up version.
1896 This variable is used internally by Configure to determine the
1897 full pathname (if any) of the grep program. After Configure runs,
1898 the value is reset to a plain "grep" and is not useful.
1901 This variable contains a command that produces the text of the
1902 /etc/group file. This is normally "cat /etc/group", but can be
1903 "ypcat group" when NIS is used.
1904 On some systems, such as os390, there may be no equivalent
1905 command, in which case this variable is unset.
1907 groupstype (groupstype.U):
1908 This variable defines Groups_t to be something like gid_t, int,
1909 ushort, or whatever type is used for the second argument to
1910 getgroups() and setgroups(). Usually, this is the same as
1911 gidtype (gid_t), but sometimes it isn't.
1914 This variable is used internally by Configure to determine the
1915 full pathname (if any) of the gzip program. After Configure runs,
1916 the value is reset to a plain "gzip" and is not useful.
1918 h_fcntl (h_fcntl.U):
1919 This is variable gets set in various places to tell i_fcntl that
1920 <fcntl.h> should be included.
1922 h_sysfile (h_sysfile.U):
1923 This is variable gets set in various places to tell i_sys_file that
1924 <sys/file.h> should be included.
1927 Gives the type of hints used for previous answers. May be one of
1928 "default", "recommended" or "previous".
1931 This variable contains a command that produces the text of the
1932 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1933 "ypcat hosts" when NIS is used.
1934 On some systems, such as os390, there may be no equivalent
1935 command, in which case this variable is unset.
1938 This variable is the size of an I16 in bytes.
1941 This variable contains the C type used for Perl's I16.
1944 This variable is the size of an I32 in bytes.
1947 This variable contains the C type used for Perl's I32.
1950 This variable is the size of an I64 in bytes.
1953 This variable contains the C type used for Perl's I64.
1956 This variable is the size of an I8 in bytes.
1959 This variable contains the C type used for Perl's I8.
1961 i_arpainet (i_arpainet.U):
1962 This variable conditionally defines the I_ARPA_INET symbol,
1963 and indicates whether a C program should include <arpa/inet.h>.
1965 i_bsdioctl (i_sysioctl.U):
1966 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1967 indicates to the C program that <sys/bsdioctl.h> exists and should
1971 This variable conditionally defines the I_DB symbol, and indicates
1972 whether a C program may include Berkeley's DB include file <db.h>.
1975 This variable conditionally defines the I_DBM symbol, which
1976 indicates to the C program that <dbm.h> exists and should
1979 i_dirent (i_dirent.U):
1980 This variable conditionally defines I_DIRENT, which indicates
1981 to the C program that it should include <dirent.h>.
1984 This variable conditionally defines the I_DLD symbol, which
1985 indicates to the C program that <dld.h> (GNU dynamic loading)
1986 exists and should be included.
1988 i_dlfcn (i_dlfcn.U):
1989 This variable conditionally defines the I_DLFCN symbol, which
1990 indicates to the C program that <dlfcn.h> exists and should
1993 i_fcntl (i_fcntl.U):
1994 This variable controls the value of I_FCNTL (which tells
1995 the C program to include <fcntl.h>).
1997 i_float (i_float.U):
1998 This variable conditionally defines the I_FLOAT symbol, and indicates
1999 whether a C program may include <float.h> to get symbols like DBL_MAX
2000 or DBL_MIN, i.e. machine dependent floating point values.
2003 This variable conditionally defines the I_GDBM symbol, which
2004 indicates to the C program that <gdbm.h> exists and should
2008 This variable conditionally defines the I_GRP symbol, and indicates
2009 whether a C program should include <grp.h>.
2011 i_iconv (i_iconv.U):
2012 This variable conditionally defines the I_ICONV symbol, and indicates
2013 whether a C program should include <iconv.h>.
2015 i_ieeefp (i_ieeefp.U):
2016 This variable conditionally defines the I_IEEEFP symbol, and indicates
2017 whether a C program should include <ieeefp.h>.
2019 i_inttypes (i_inttypes.U):
2020 This variable conditionally defines the I_INTTYPES symbol,
2021 and indicates whether a C program should include <inttypes.h>.
2023 i_libutil (i_libutil.U):
2024 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2025 whether a C program should include <libutil.h>.
2027 i_limits (i_limits.U):
2028 This variable conditionally defines the I_LIMITS symbol, and indicates
2029 whether a C program may include <limits.h> to get symbols like WORD_BIT
2032 i_locale (i_locale.U):
2033 This variable conditionally defines the I_LOCALE symbol,
2034 and indicates whether a C program should include <locale.h>.
2036 i_machcthr (i_machcthr.U):
2037 This variable conditionally defines the I_MACH_CTHREADS symbol,
2038 and indicates whether a C program should include <mach/cthreads.h>.
2040 i_malloc (i_malloc.U):
2041 This variable conditionally defines the I_MALLOC symbol, and indicates
2042 whether a C program should include <malloc.h>.
2045 This variable conditionally defines the I_MATH symbol, and indicates
2046 whether a C program may include <math.h>.
2048 i_memory (i_memory.U):
2049 This variable conditionally defines the I_MEMORY symbol, and indicates
2050 whether a C program should include <memory.h>.
2052 i_mntent (i_mntent.U):
2053 This variable conditionally defines the I_MNTENT symbol, and indicates
2054 whether a C program should include <mntent.h>.
2057 This variable conditionally defines the I_NDBM symbol, which
2058 indicates to the C program that <ndbm.h> exists and should
2061 i_netdb (i_netdb.U):
2062 This variable conditionally defines the I_NETDB symbol, and indicates
2063 whether a C program should include <netdb.h>.
2065 i_neterrno (i_neterrno.U):
2066 This variable conditionally defines the I_NET_ERRNO symbol, which
2067 indicates to the C program that <net/errno.h> exists and should
2070 i_netinettcp (i_netinettcp.U):
2071 This variable conditionally defines the I_NETINET_TCP symbol,
2072 and indicates whether a C program should include <netinet/tcp.h>.
2075 This variable conditionally defines I_NETINET_IN, which indicates
2076 to the C program that it should include <netinet/in.h>. Otherwise,
2077 you may try <sys/in.h>.
2080 This variable conditionally defines the I_POLL symbol, and indicates
2081 whether a C program should include <poll.h>.
2084 This variable conditionally defines the I_PROT symbol, and indicates
2085 whether a C program should include <prot.h>.
2087 i_pthread (i_pthread.U):
2088 This variable conditionally defines the I_PTHREAD symbol,
2089 and indicates whether a C program should include <pthread.h>.
2092 This variable conditionally defines I_PWD, which indicates
2093 to the C program that it should include <pwd.h>.
2095 i_rpcsvcdbm (i_dbm.U):
2096 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2097 indicates to the C program that <rpcsvc/dbm.h> exists and should
2098 be included. Some System V systems might need this instead of <dbm.h>.
2101 This variable conditionally defines the I_SFIO symbol,
2102 and indicates whether a C program should include <sfio.h>.
2104 i_sgtty (i_termio.U):
2105 This variable conditionally defines the I_SGTTY symbol, which
2106 indicates to the C program that it should include <sgtty.h> rather
2109 i_shadow (i_shadow.U):
2110 This variable conditionally defines the I_SHADOW symbol, and indicates
2111 whether a C program should include <shadow.h>.
2113 i_socks (i_socks.U):
2114 This variable conditionally defines the I_SOCKS symbol, and indicates
2115 whether a C program should include <socks.h>.
2117 i_stdarg (i_varhdr.U):
2118 This variable conditionally defines the I_STDARG symbol, which
2119 indicates to the C program that <stdarg.h> exists and should
2122 i_stddef (i_stddef.U):
2123 This variable conditionally defines the I_STDDEF symbol, which
2124 indicates to the C program that <stddef.h> exists and should
2127 i_stdlib (i_stdlib.U):
2128 This variable conditionally defines the I_STDLIB symbol, which
2129 indicates to the C program that <stdlib.h> exists and should
2132 i_string (i_string.U):
2133 This variable conditionally defines the I_STRING symbol, which
2134 indicates that <string.h> should be included rather than <strings.h>.
2136 i_sunmath (i_sunmath.U):
2137 This variable conditionally defines the I_SUNMATH symbol, and indicates
2138 whether a C program should include <sunmath.h>.
2140 i_sysaccess (i_sysaccess.U):
2141 This variable conditionally defines the I_SYS_ACCESS symbol,
2142 and indicates whether a C program should include <sys/access.h>.
2144 i_sysdir (i_sysdir.U):
2145 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2146 whether a C program should include <sys/dir.h>.
2148 i_sysfile (i_sysfile.U):
2149 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2150 whether a C program should include <sys/file.h> to get R_OK and friends.
2152 i_sysfilio (i_sysioctl.U):
2153 This variable conditionally defines the I_SYS_FILIO symbol, which
2154 indicates to the C program that <sys/filio.h> exists and should
2155 be included in preference to <sys/ioctl.h>.
2158 This variable conditionally defines I_SYS_IN, which indicates
2159 to the C program that it should include <sys/in.h> instead of
2162 i_sysioctl (i_sysioctl.U):
2163 This variable conditionally defines the I_SYS_IOCTL symbol, which
2164 indicates to the C program that <sys/ioctl.h> exists and should
2167 i_syslog (i_syslog.U):
2168 This variable conditionally defines the I_SYSLOG symbol,
2169 and indicates whether a C program should include <syslog.h>.
2171 i_sysmman (i_sysmman.U):
2172 This variable conditionally defines the I_SYS_MMAN symbol, and
2173 indicates whether a C program should include <sys/mman.h>.
2175 i_sysmode (i_sysmode.U):
2176 This variable conditionally defines the I_SYSMODE symbol,
2177 and indicates whether a C program should include <sys/mode.h>.
2179 i_sysmount (i_sysmount.U):
2180 This variable conditionally defines the I_SYSMOUNT symbol,
2181 and indicates whether a C program should include <sys/mount.h>.
2183 i_sysndir (i_sysndir.U):
2184 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2185 whether a C program should include <sys/ndir.h>.
2187 i_sysparam (i_sysparam.U):
2188 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2189 whether a C program should include <sys/param.h>.
2191 i_sysresrc (i_sysresrc.U):
2192 This variable conditionally defines the I_SYS_RESOURCE symbol,
2193 and indicates whether a C program should include <sys/resource.h>.
2195 i_syssecrt (i_syssecrt.U):
2196 This variable conditionally defines the I_SYS_SECURITY symbol,
2197 and indicates whether a C program should include <sys/security.h>.
2199 i_sysselct (i_sysselct.U):
2200 This variable conditionally defines I_SYS_SELECT, which indicates
2201 to the C program that it should include <sys/select.h> in order to
2202 get the definition of struct timeval.
2204 i_syssockio (i_sysioctl.U):
2205 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2206 C program that socket ioctl codes may be found in <sys/sockio.h>
2207 instead of <sys/ioctl.h>.
2209 i_sysstat (i_sysstat.U):
2210 This variable conditionally defines the I_SYS_STAT symbol,
2211 and indicates whether a C program should include <sys/stat.h>.
2213 i_sysstatfs (i_sysstatfs.U):
2214 This variable conditionally defines the I_SYSSTATFS symbol,
2215 and indicates whether a C program should include <sys/statfs.h>.
2217 i_sysstatvfs (i_sysstatvfs.U):
2218 This variable conditionally defines the I_SYSSTATVFS symbol,
2219 and indicates whether a C program should include <sys/statvfs.h>.
2221 i_systime (i_time.U):
2222 This variable conditionally defines I_SYS_TIME, which indicates
2223 to the C program that it should include <sys/time.h>.
2225 i_systimek (i_time.U):
2226 This variable conditionally defines I_SYS_TIME_KERNEL, which
2227 indicates to the C program that it should include <sys/time.h>
2228 with KERNEL defined.
2230 i_systimes (i_systimes.U):
2231 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2232 whether a C program should include <sys/times.h>.
2234 i_systypes (i_systypes.U):
2235 This variable conditionally defines the I_SYS_TYPES symbol,
2236 and indicates whether a C program should include <sys/types.h>.
2238 i_sysuio (i_sysuio.U):
2239 This variable conditionally defines the I_SYSUIO symbol, and indicates
2240 whether a C program should include <sys/uio.h>.
2242 i_sysun (i_sysun.U):
2243 This variable conditionally defines I_SYS_UN, which indicates
2244 to the C program that it should include <sys/un.h> to get UNIX
2245 domain socket definitions.
2247 i_sysutsname (i_sysutsname.U):
2248 This variable conditionally defines the I_SYSUTSNAME symbol,
2249 and indicates whether a C program should include <sys/utsname.h>.
2251 i_sysvfs (i_sysvfs.U):
2252 This variable conditionally defines the I_SYSVFS symbol,
2253 and indicates whether a C program should include <sys/vfs.h>.
2255 i_syswait (i_syswait.U):
2256 This variable conditionally defines I_SYS_WAIT, which indicates
2257 to the C program that it should include <sys/wait.h>.
2259 i_termio (i_termio.U):
2260 This variable conditionally defines the I_TERMIO symbol, which
2261 indicates to the C program that it should include <termio.h> rather
2264 i_termios (i_termio.U):
2265 This variable conditionally defines the I_TERMIOS symbol, which
2266 indicates to the C program that the POSIX <termios.h> file is
2270 This variable conditionally defines I_TIME, which indicates
2271 to the C program that it should include <time.h>.
2273 i_unistd (i_unistd.U):
2274 This variable conditionally defines the I_UNISTD symbol, and indicates
2275 whether a C program should include <unistd.h>.
2277 i_ustat (i_ustat.U):
2278 This variable conditionally defines the I_USTAT symbol, and indicates
2279 whether a C program should include <ustat.h>.
2281 i_utime (i_utime.U):
2282 This variable conditionally defines the I_UTIME symbol, and indicates
2283 whether a C program should include <utime.h>.
2285 i_values (i_values.U):
2286 This variable conditionally defines the I_VALUES symbol, and indicates
2287 whether a C program may include <values.h> to get symbols like MAXLONG
2290 i_varargs (i_varhdr.U):
2291 This variable conditionally defines I_VARARGS, which indicates
2292 to the C program that it should include <varargs.h>.
2294 i_varhdr (i_varhdr.U):
2295 Contains the name of the header to be included to get va_dcl definition.
2296 Typically one of varargs.h or stdarg.h.
2298 i_vfork (i_vfork.U):
2299 This variable conditionally defines the I_VFORK symbol, and indicates
2300 whether a C program should include vfork.h.
2302 ignore_versioned_solibs (libs.U):
2303 This variable should be non-empty if non-versioned shared
2304 libraries (libfoo.so.x.y) are to be ignored (because they
2305 cannot be linked against).
2307 inc_version_list (inc_version_list.U):
2308 This variable specifies the list of subdirectories in over
2309 which perl.c:incpush() and lib/lib.pm will automatically
2310 search when adding directories to @INC. The elements in
2311 the list are separated by spaces. This is only useful
2312 if you have a perl library directory tree structured like the
2313 default one. See INSTALL for how this works. The versioned
2314 site_perl directory was introduced in 5.005, so that is the
2315 lowest possible value.
2317 inc_version_list_init (inc_version_list.U):
2318 This variable holds the same list as inc_version_list, but
2319 each item is enclosed in double quotes and separated by commas,
2320 suitable for use in the PERL_INC_VERSION_LIST initialization.
2323 This variable must preceed the normal include path to get hte
2324 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2325 Value can be "" or "/bsd43" on mips.
2328 This variable is defined but not used by Configure.
2329 The value is a plain '' and is not useful.
2331 installarchlib (archlib.U):
2332 This variable is really the same as archlibexp but may differ on
2333 those systems using AFS. For extra portability, only this variable
2334 should be used in makefiles.
2337 This variable is the same as binexp unless AFS is running in which case
2338 the user is explicitely prompted for it. This variable should always
2339 be used in your makefiles for maximum portability.
2341 installman1dir (man1dir.U):
2342 This variable is really the same as man1direxp, unless you are using
2343 AFS in which case it points to the read/write location whereas
2344 man1direxp only points to the read-only access location. For extra
2345 portability, you should only use this variable within your makefiles.
2347 installman3dir (man3dir.U):
2348 This variable is really the same as man3direxp, unless you are using
2349 AFS in which case it points to the read/write location whereas
2350 man3direxp only points to the read-only access location. For extra
2351 portability, you should only use this variable within your makefiles.
2353 installprefix (installprefix.U):
2354 This variable holds the name of the directory below which
2355 "make install" will install the package. For most users, this
2356 is the same as prefix. However, it is useful for
2357 installing the software into a different (usually temporary)
2358 location after which it can be bundled up and moved somehow
2359 to the final location specified by prefix.
2361 installprefixexp (installprefix.U):
2362 This variable holds the full absolute path of installprefix
2363 with all ~-expansion done.
2365 installprivlib (privlib.U):
2366 This variable is really the same as privlibexp but may differ on
2367 those systems using AFS. For extra portability, only this variable
2368 should be used in makefiles.
2370 installscript (scriptdir.U):
2371 This variable is usually the same as scriptdirexp, unless you are on
2372 a system running AFS, in which case they may differ slightly. You
2373 should always use this variable within your makefiles for portability.
2375 installsitearch (sitearch.U):
2376 This variable is really the same as sitearchexp but may differ on
2377 those systems using AFS. For extra portability, only this variable
2378 should be used in makefiles.
2380 installsitebin (sitebin.U):
2381 This variable is usually the same as sitebinexp, unless you are on
2382 a system running AFS, in which case they may differ slightly. You
2383 should always use this variable within your makefiles for portability.
2385 installsitelib (sitelib.U):
2386 This variable is really the same as sitelibexp but may differ on
2387 those systems using AFS. For extra portability, only this variable
2388 should be used in makefiles.
2390 installstyle (installstyle.U):
2391 This variable describes the "style" of the perl installation.
2392 This is intended to be useful for tools that need to
2393 manipulate entire perl distributions. Perl itself doesn't use
2394 this to find its libraries -- the library directories are
2395 stored directly in Config.pm. Currently, there are only two
2396 styles: "lib" and "lib/perl5". The default library locations
2397 (e.g. privlib, sitelib) are either $prefix/lib or
2398 $prefix/lib/perl5. The former is useful if $prefix is a
2399 directory dedicated to perl (e.g. /opt/perl), while the latter
2400 is useful if $prefix is shared by many packages, e.g. if
2402 This may later be extended to include other information, so
2403 be careful with pattern-matching on the results.
2404 For compatibility with perl5.005 and earlier, the default
2405 setting is based on whether or not $prefix contains the string
2408 installusrbinperl (instubperl.U):
2409 This variable tells whether Perl should be installed also as
2410 /usr/bin/perl in addition to
2413 installvendorarch (vendorarch.U):
2414 This variable is really the same as vendorarchexp but may differ on
2415 those systems using AFS. For extra portability, only this variable
2416 should be used in makefiles.
2418 installvendorbin (vendorbin.U):
2419 This variable is really the same as vendorbinexp but may differ on
2420 those systems using AFS. For extra portability, only this variable
2421 should be used in makefiles.
2423 installvendorlib (vendorlib.U):
2424 This variable is really the same as vendorlibexp but may differ on
2425 those systems using AFS. For extra portability, only this variable
2426 should be used in makefiles.
2428 intsize (intsize.U):
2429 This variable contains the value of the INTSIZE symbol, which
2430 indicates to the C program how many bytes there are in an int.
2432 ivdformat (perlxvf.U):
2433 This variable contains the format string used for printing
2434 a Perl IV as a signed decimal integer.
2437 This variable is the size of an IV in bytes.
2440 This variable contains the C type used for Perl's IV.
2442 known_extensions (Extensions.U):
2443 This variable holds a list of all XS extensions included in
2447 This variable is defined but not used by Configure.
2448 The value is a plain '' and is not useful.
2451 This variable indicates the program to be used to link
2452 libraries for dynamic loading. On some systems, it is 'ld'.
2453 On ELF systems, it should be $cc. Mostly, we'll try to respect
2454 the hint file setting.
2456 lddlflags (dlsrc.U):
2457 This variable contains any special flags that might need to be
2458 passed to $ld to create a shared library suitable for dynamic
2459 loading. It is up to the makefile to use it. For hpux, it
2460 should be '-b'. For sunos 4.1, it is empty.
2462 ldflags (ccflags.U):
2463 This variable contains any additional C loader flags desired by
2464 the user. It is up to the Makefile to use this.
2466 ldflags_uselargefiles (uselfs.U):
2467 This variable contains the loader flags needed by large file builds
2468 and added to ldflags by hints files.
2470 ldlibpthname (libperl.U):
2471 This variable holds the name of the shared library
2472 search path, often LD_LIBRARY_PATH. To get an empty
2473 string, the hints file must set this to 'none'.
2476 This variable is used internally by Configure to determine the
2477 full pathname (if any) of the less program. After Configure runs,
2478 the value is reset to a plain "less" and is not useful.
2481 This is an old synonym for _a.
2484 This variable contains the location of the C library.
2486 libperl (libperl.U):
2487 The perl executable is obtained by linking perlmain.c with
2488 libperl, any static extensions (usually just DynaLoader),
2489 and any other libraries needed on this system. libperl
2490 is usually libperl.a, but can also be libperl.so.xxx if
2491 the user wishes to build a perl executable with a shared
2495 This variable holds the general path (space-separated) used to find
2496 libraries. It is intended to be used by other units.
2499 This variable holds the additional libraries we want to use.
2500 It is up to the Makefile to deal with it.
2503 This variable holds the directory names aka dirnames of the libraries
2504 we found and accepted, duplicates are removed.
2507 This variable holds the filenames aka basenames of the libraries
2508 we found and accepted.
2511 This variable holds the full pathnames of the libraries
2512 we found and accepted.
2515 This variable holds the directory names probed for libraries.
2517 libswanted (Myinit.U):
2518 This variable holds a list of all the libraries we want to
2519 search. The order is chosen to pick up the c library
2520 ahead of ucb or bsd libraries for SVR4.
2522 libswanted_uselargefiles (uselfs.U):
2523 This variable contains the libraries needed by large file builds
2524 and added to ldflags by hints files. It is a space separated list
2525 of the library names without the "lib" prefix or any suffix, just
2529 This variable is defined but not used by Configure.
2530 The value is a plain '' and is not useful.
2533 This variable is defined but not used by Configure.
2534 The value is a plain '' and is not useful.
2536 lkflags (ccflags.U):
2537 This variable contains any additional C partial linker flags desired by
2538 the user. It is up to the Makefile to use this.
2541 This variable is used internally by Configure to determine the
2542 full pathname (if any) of the ln program. After Configure runs,
2543 the value is reset to a plain "ln" and is not useful.
2546 This variable holds the name of the command to make
2547 symbolic links (if they are supported). It can be used
2548 in the Makefile. It is either 'ln -s' or 'ln'
2550 locincpth (ccflags.U):
2551 This variable contains a list of additional directories to be
2552 searched by the compiler. The appropriate '-I' directives will
2553 be added to ccflags. This is intended to simplify setting
2554 local directories from the Configure command line.
2555 It's not much, but it parallels the loclibpth stuff in libpth.U.
2557 loclibpth (libpth.U):
2558 This variable holds the paths (space-separated) used to find local
2559 libraries. It is prepended to libpth, and is intended to be easily
2560 set from the command line.
2562 longdblsize (d_longdbl.U):
2563 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2564 indicates to the C program how many bytes there are in a long double,
2565 if this system supports long doubles.
2567 longlongsize (d_longlong.U):
2568 This variable contains the value of the LONGLONGSIZE symbol, which
2569 indicates to the C program how many bytes there are in a long long,
2570 if this system supports long long.
2572 longsize (intsize.U):
2573 This variable contains the value of the LONGSIZE symbol, which
2574 indicates to the C program how many bytes there are in a long.
2577 This variable is defined but not used by Configure.
2578 The value is a plain '' and is not useful.
2581 This variable is defined but not used by Configure.
2582 The value is a plain '' and is not useful.
2585 This variable is used internally by Configure to determine the
2586 full pathname (if any) of the ls program. After Configure runs,
2587 the value is reset to a plain "ls" and is not useful.
2589 lseeksize (lseektype.U):
2590 This variable defines lseektype to be something like off_t, long,
2591 or whatever type is used to declare lseek offset's type in the
2592 kernel (which also appears to be lseek's return type).
2594 lseektype (lseektype.U):
2595 This variable defines lseektype to be something like off_t, long,
2596 or whatever type is used to declare lseek offset's type in the
2597 kernel (which also appears to be lseek's return type).
2600 This variable is defined but not used by Configure.
2601 The value is a plain '' and is not useful.
2604 This variable is defined but not used by Configure.
2605 The value is a plain '' and is not useful.
2608 This variable is used internally by Configure to determine the
2609 full pathname (if any) of the make program. After Configure runs,
2610 the value is reset to a plain "make" and is not useful.
2612 make_set_make (make.U):
2613 Some versions of 'make' set the variable MAKE. Others do not.
2614 This variable contains the string to be included in Makefile.SH
2615 so that MAKE is set if needed, and not if not needed.
2616 Possible values are:
2617 make_set_make='#' # If your make program handles this for you,
2618 make_set_make="MAKE=$make" # if it doesn't.
2619 I used a comment character so that we can distinguish a
2620 'set' value (from a previous config.sh or Configure '-D' option)
2621 from an uncomputed value.
2623 mallocobj (mallocsrc.U):
2624 This variable contains the name of the malloc.o that this package
2625 generates, if that malloc.o is preferred over the system malloc.
2626 Otherwise the value is null. This variable is intended for generating
2627 Makefiles. See mallocsrc.
2629 mallocsrc (mallocsrc.U):
2630 This variable contains the name of the malloc.c that comes with
2631 the package, if that malloc.c is preferred over the system malloc.
2632 Otherwise the value is null. This variable is intended for generating
2635 malloctype (mallocsrc.U):
2636 This variable contains the kind of ptr returned by malloc and realloc.
2638 man1dir (man1dir.U):
2639 This variable contains the name of the directory in which manual
2640 source pages are to be put. It is the responsibility of the
2641 Makefile.SH to get the value of this into the proper command.
2642 You must be prepared to do the ~name expansion yourself.
2644 man1direxp (man1dir.U):
2645 This variable is the same as the man1dir variable, but is filename
2646 expanded at configuration time, for convenient use in makefiles.
2648 man1ext (man1dir.U):
2649 This variable contains the extension that the manual page should
2650 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2653 man3dir (man3dir.U):
2654 This variable contains the name of the directory in which manual
2655 source pages are to be put. It is the responsibility of the
2656 Makefile.SH to get the value of this into the proper command.
2657 You must be prepared to do the ~name expansion yourself.
2659 man3direxp (man3dir.U):
2660 This variable is the same as the man3dir variable, but is filename
2661 expanded at configuration time, for convenient use in makefiles.
2663 man3ext (man3dir.U):
2664 This variable contains the extension that the manual page should
2665 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2669 This variable is used internally by Configure to determine the
2670 full pathname (if any) of the Mcc program. After Configure runs,
2671 the value is reset to a plain "Mcc" and is not useful.
2673 mips_type (usrinc.U):
2674 This variable holds the environment type for the mips system.
2675 Possible values are "BSD 4.3" and "System V".
2678 This variable is used internally by Configure to determine the
2679 full pathname (if any) of the mkdir program. After Configure runs,
2680 the value is reset to a plain "mkdir" and is not useful.
2682 mmaptype (d_mmap.U):
2683 This symbol contains the type of pointer returned by mmap()
2684 (and simultaneously the type of the first argument).
2685 It can be 'void *' or 'caddr_t'.
2687 modetype (modetype.U):
2688 This variable defines modetype to be something like mode_t,
2689 int, unsigned short, or whatever type is used to declare file
2690 modes for system calls.
2693 This variable is used internally by Configure to determine the
2694 full pathname (if any) of the more program. After Configure runs,
2695 the value is reset to a plain "more" and is not useful.
2697 multiarch (multiarch.U):
2698 This variable conditionally defines the MULTIARCH symbol
2699 which signifies the presence of multiplatform files.
2700 This is normally set by hints files.
2703 This variable is defined but not used by Configure.
2704 The value is a plain '' and is not useful.
2706 myarchname (archname.U):
2707 This variable holds the architecture name computed by Configure in
2708 a previous run. It is not intended to be perused by any user and
2709 should never be set in a hint file.
2711 mydomain (myhostname.U):
2712 This variable contains the eventual value of the MYDOMAIN symbol,
2713 which is the domain of the host the program is going to run on.
2714 The domain must be appended to myhostname to form a complete host name.
2715 The dot comes with mydomain, and need not be supplied by the program.
2717 myhostname (myhostname.U):
2718 This variable contains the eventual value of the MYHOSTNAME symbol,
2719 which is the name of the host the program is going to run on.
2720 The domain is not kept with hostname, but must be gotten from mydomain.
2721 The dot comes with mydomain, and need not be supplied by the program.
2723 myuname (Oldconfig.U):
2724 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2725 pseudo variables assignments in the output are stripped, thank you. The
2726 whole thing is then lower-cased.
2729 This variable contains the '-n' flag if that is what causes the echo
2730 command to suppress newline. Otherwise it is null. Correct usage is
2731 $echo $n "prompt for a question: $c".
2733 netdb_hlen_type (netdbtype.U):
2734 This variable holds the type used for the 2nd argument to
2735 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2736 This is only useful if you have gethostbyaddr(), naturally.
2738 netdb_host_type (netdbtype.U):
2739 This variable holds the type used for the 1st argument to
2740 gethostbyaddr(). Usually, this is char * or void *, possibly
2741 with or without a const prefix.
2742 This is only useful if you have gethostbyaddr(), naturally.
2744 netdb_name_type (netdbtype.U):
2745 This variable holds the type used for the argument to
2746 gethostbyname(). Usually, this is char * or const char *.
2747 This is only useful if you have gethostbyname(), naturally.
2749 netdb_net_type (netdbtype.U):
2750 This variable holds the type used for the 1st argument to
2751 getnetbyaddr(). Usually, this is int or long.
2752 This is only useful if you have getnetbyaddr(), naturally.
2755 This variable is used internally by Configure to determine the
2756 full pathname (if any) of the nm program. After Configure runs,
2757 the value is reset to a plain "nm" and is not useful.
2760 This variable holds the options that may be necessary for nm.
2762 nm_so_opt (usenm.U):
2763 This variable holds the options that may be necessary for nm
2764 to work on a shared library but that can not be used on an
2765 archive library. Currently, this is only used by Linux, where
2766 nm --dynamic is *required* to get symbols from an ELF library which
2767 has been stripped, but nm --dynamic is *fatal* on an archive library.
2768 Maybe Linux should just always set usenm=false.
2770 nonxs_ext (Extensions.U):
2771 This variable holds a list of all non-xs extensions included
2772 in the package. All of them will be built.
2775 This variable is used internally by Configure to determine the
2776 full pathname (if any) of the nroff program. After Configure runs,
2777 the value is reset to a plain "nroff" and is not useful.
2779 nveformat (perlxvf.U):
2780 This variable contains the format string used for printing
2781 a Perl NV using %e-ish floating point format.
2783 nvEUformat (perlxvf.U):
2784 This variable contains the format string used for printing
2785 a Perl NV using %E-ish floating point format.
2787 nvfformat (perlxvf.U):
2788 This variable confains the format string used for printing
2789 a Perl NV using %f-ish floating point format.
2791 nvFUformat (perlxvf.U):
2792 This variable confains the format string used for printing
2793 a Perl NV using %F-ish floating point format.
2795 nvgformat (perlxvf.U):
2796 This variable contains the format string used for printing
2797 a Perl NV using %g-ish floating point format.
2799 nvGUformat (perlxvf.U):
2800 This variable contains the format string used for printing
2801 a Perl NV using %G-ish floating point format.
2804 This variable is the size of an NV in bytes.
2807 This variable contains the C type used for Perl's NV.
2809 o_nonblock (nblock_io.U):
2810 This variable bears the symbol value to be used during open() or fcntl()
2811 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2812 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2813 but that is only supported by some devices.
2816 This is an old synonym for _o.
2818 old_pthread_create_joinable (d_pthrattrj.U):
2819 This variable defines the constant to use for creating joinable
2820 (aka undetached) pthreads. Unused if pthread.h defines
2821 PTHREAD_CREATE_JOINABLE. If used, possible values are
2822 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2824 optimize (ccflags.U):
2825 This variable contains any optimizer/debugger flag that should be used.
2826 It is up to the Makefile to use it.
2828 orderlib (orderlib.U):
2829 This variable is "true" if the components of libraries must be ordered
2830 (with `lorder $* | tsort`) before placing them in an archive. Set to
2831 "false" if ranlib or ar can generate random libraries.
2833 osname (Oldconfig.U):
2834 This variable contains the operating system name (e.g. sunos,
2835 solaris, hpux, etc.). It can be useful later on for setting
2836 defaults. Any spaces are replaced with underscores. It is set
2837 to a null string if we can't figure it out.
2839 osvers (Oldconfig.U):
2840 This variable contains the operating system version (e.g.
2841 4.1.3, 5.2, etc.). It is primarily used for helping select
2842 an appropriate hints file, but might be useful elsewhere for
2843 setting defaults. It is set to '' if we can't figure it out.
2844 We try to be flexible about how much of the version number
2845 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2846 same for this package, hints files might just be os_4.0 or
2847 os_4.1, etc., not keeping separate files for each little release.
2849 otherlibdirs (otherlibdirs.U):
2850 This variable contains a colon-separated set of paths for the perl
2851 binary to search for additional library files or modules.
2852 These directories will be tacked to the end of @INC.
2853 Perl will automatically search below each path for version-
2854 and architecture-specific directories. See inc_version_list
2856 A value of ' ' means 'none' and is used to preserve this value
2857 for the next run through Configure.
2859 package (package.U):
2860 This variable contains the name of the package being constructed.
2861 It is primarily intended for the use of later Configure units.
2864 This variable contains the name of the preferred pager on the system.
2865 Usual values are (the full pathnames of) more, less, pg, or cat.
2868 This variable contains a command that produces the text of the
2869 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2870 "ypcat passwd" when NIS is used.
2871 On some systems, such as os390, there may be no equivalent
2872 command, in which case this variable is unset.
2874 patchlevel (patchlevel.U):
2875 The patchlevel level of this package.
2876 The value of patchlevel comes from the patchlevel.h file.
2877 In a version number such as 5.6.1, this is the "6".
2878 In patchlevel.h, this is referred to as "PERL_VERSION".
2881 This is an old synonym for p_ in Head.U, the character
2882 used to separate elements in the command shell search PATH.
2885 This variable contains the full path (if any) to a previously
2886 installed perl5.005 or later suitable for running the script
2887 to determine inc_version_list.
2890 This variable is defined but not used by Configure.
2891 The value is a plain '' and is not useful.
2893 PERL_REVISION (Oldsyms.U):
2894 In a Perl version number such as 5.6.2, this is the 5.
2895 This value is manually set in patchlevel.h
2897 PERL_SUBVERSION (Oldsyms.U):
2898 In a Perl version number such as 5.6.2, this is the 2.
2899 Values greater than 50 represent potentially unstable
2900 development subversions.
2901 This value is manually set in patchlevel.h
2903 PERL_VERSION (Oldsyms.U):
2904 In a Perl version number such as 5.6.2, this is the 6.
2905 This value is manually set in patchlevel.h
2907 perladmin (perladmin.U):
2908 Electronic mail address of the perl5 administrator.
2911 The list of libraries needed by Perl only (any libraries needed
2912 by extensions only will by dropped, if using dynamic loading).
2914 perlpath (perlpath.U):
2915 This variable contains the eventual value of the PERLPATH symbol,
2916 which contains the name of the perl interpreter to be used in
2917 shell scripts and in the "eval 'exec'" idiom.
2920 This variable is used internally by Configure to determine the
2921 full pathname (if any) of the pg program. After Configure runs,
2922 the value is reset to a plain "pg" and is not useful.
2924 phostname (myhostname.U):
2925 This variable contains the eventual value of the PHOSTNAME symbol,
2926 which is a command that can be fed to popen() to get the host name.
2927 The program should probably not presume that the domain is or isn't
2930 pidtype (pidtype.U):
2931 This variable defines PIDTYPE to be something like pid_t, int,
2932 ushort, or whatever type is used to declare process ids in the kernel.
2935 Holds the private path used by Configure to find out the libraries.
2936 Its value is prepend to libpth. This variable takes care of special
2937 machines, like the mips. Usually, it should be empty.
2939 pm_apiversion (xs_apiversion.U):
2940 This variable contains the version of the oldest perl
2941 compatible with the present perl. (That is, pure perl modules
2942 written for $pm_apiversion will still work for the current
2943 version). perl.c:incpush() and lib/lib.pm will automatically
2944 search in $sitelib for older directories across major versions
2945 back to pm_apiversion. This is only useful if you have a perl
2946 library directory tree structured like the default one. The
2947 versioned site_perl library was introduced in 5.005, so that's
2948 the default setting for this variable. It's hard to imagine
2949 it changing before Perl6. It is included here for symmetry
2950 with xs_apiveprsion -- the searching algorithms will
2951 (presumably) be similar.
2952 See the INSTALL file for how this works.
2955 This variable is defined but not used by Configure.
2956 The value is a plain '' and is not useful.
2959 This variable is defined but not used by Configure.
2960 The value is a plain '' and is not useful.
2963 This variable holds the name of the directory below which the
2964 user will install the package. Usually, this is /usr/local, and
2965 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2966 man pages in /usr/local/man, etc. It is only used to set defaults
2967 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2969 prefixexp (prefix.U):
2970 This variable holds the full absolute path of the directory below
2971 which the user will install the package. Derived from prefix.
2973 privlib (privlib.U):
2974 This variable contains the eventual value of the PRIVLIB symbol,
2975 which is the name of the private library for this package. It may
2976 have a ~ on the front. It is up to the makefile to eventually create
2977 this directory while performing installation (with ~ substitution).
2979 privlibexp (privlib.U):
2980 This variable is the ~name expanded version of privlib, so that you
2981 may use it directly in Makefiles or shell scripts.
2983 prototype (prototype.U):
2984 This variable holds the eventual value of CAN_PROTOTYPE, which
2985 indicates the C compiler can handle funciton prototypes.
2987 ptrsize (ptrsize.U):
2988 This variable contains the value of the PTRSIZE symbol, which
2989 indicates to the C program how many bytes there are in a pointer.
2991 quadkind (quadtype.U):
2992 This variable, if defined, encodes the type of a quad:
2993 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2995 quadtype (quadtype.U):
2996 This variable defines Quad_t to be something like long, int,
2997 long long, int64_t, or whatever type is used for 64-bit integers.
2999 randbits (randfunc.U):
3000 Indicates how many bits are produced by the function used to
3001 generate normalized random numbers.
3003 randfunc (randfunc.U):
3004 Indicates the name of the random number function to use.
3005 Values include drand48, random, and rand. In C programs,
3006 the 'Drand01' macro is defined to generate uniformly distributed
3007 random numbers over the range [0., 1.[ (see drand01 and nrand).
3009 randseedtype (randfunc.U):
3010 Indicates the type of the argument of the seedfunc.
3012 ranlib (orderlib.U):
3013 This variable is set to the pathname of the ranlib program, if it is
3014 needed to generate random libraries. Set to ":" if ar can generate
3015 random libraries or if random libraries are not supported
3017 rd_nodata (nblock_io.U):
3018 This variable holds the return code from read() when no data is
3019 present. It should be -1, but some systems return 0 when O_NDELAY is
3020 used, which is a shame because you cannot make the difference between
3021 no data and an EOF.. Sigh!
3023 revision (patchlevel.U):
3024 The value of revision comes from the patchlevel.h file.
3025 In a version number such as 5.6.1, this is the "5".
3026 In patchlevel.h, this is referred to as "PERL_REVISION".
3029 This variable is used internally by Configure to determine the
3030 full pathname (if any) of the rm program. After Configure runs,
3031 the value is reset to a plain "rm" and is not useful.
3034 This variable is defined but not used by Configure.
3035 The value is a plain '' and is not useful.
3038 This variable contains 'true' or 'false' depending whether the
3039 nm extraction should be performed or not, according to the value
3040 of usenm and the flags on the Configure command line.
3042 sched_yield (d_pthread_y.U):
3043 This variable defines the way to yield the execution
3044 of the current thread.
3046 scriptdir (scriptdir.U):
3047 This variable holds the name of the directory in which the user wants
3048 to put publicly scripts for the package in question. It is either
3049 the same directory as for binaries, or a special one that can be
3050 mounted across different architectures, like /usr/share. Programs
3051 must be prepared to deal with ~name expansion.
3053 scriptdirexp (scriptdir.U):
3054 This variable is the same as scriptdir, but is filename expanded
3055 at configuration time, for programs not wanting to bother with it.
3058 This variable is used internally by Configure to determine the
3059 full pathname (if any) of the sed program. After Configure runs,
3060 the value is reset to a plain "sed" and is not useful.
3062 seedfunc (randfunc.U):
3063 Indicates the random number generating seed function.
3064 Values include srand48, srandom, and srand.
3066 selectminbits (selectminbits.U):
3067 This variable holds the minimum number of bits operated by select.
3068 That is, if you do select(n, ...), how many bits at least will be
3069 cleared in the masks if some activity is detected. Usually this
3070 is either n or 32*ceil(n/32), especially many little-endians do
3071 the latter. This is only useful if you have select(), naturally.
3073 selecttype (selecttype.U):
3074 This variable holds the type used for the 2nd, 3rd, and 4th
3075 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3076 is defined, and 'int *' otherwise. This is only useful if you
3077 have select(), naturally.
3080 This variable is defined but not used by Configure.
3081 The value is a plain '' and is not useful.
3084 This variable contains the full pathname of the shell used
3085 on this system to execute Bourne shell scripts. Usually, this will be
3086 /bin/sh, though it's possible that some systems will have /bin/ksh,
3087 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3089 This unit comes before Options.U, so you can't set sh with a '-D'
3090 option, though you can override this (and startsh)
3091 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3094 This variable is defined but not used by Configure.
3095 The value is a plain '' and is not useful.
3097 sharpbang (spitshell.U):
3098 This variable contains the string #! if this system supports that
3101 shmattype (d_shmat.U):
3102 This symbol contains the type of pointer returned by shmat().
3103 It can be 'void *' or 'char *'.
3105 shortsize (intsize.U):
3106 This variable contains the value of the SHORTSIZE symbol which
3107 indicates to the C program how many bytes there are in a short.
3109 shrpenv (libperl.U):
3110 If the user builds a shared libperl.so, then we need to tell the
3111 'perl' executable where it will be able to find the installed libperl.so.
3112 One way to do this on some systems is to set the environment variable
3113 LD_RUN_PATH to the directory that will be the final location of the
3114 shared libperl.so. The makefile can use this with something like
3115 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3117 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3120 See the main perl Makefile.SH for actual working usage.
3121 Alternatively, we might be able to use a command line option such
3122 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3123 $archlibexp/CORE (Linux).
3125 shsharp (spitshell.U):
3126 This variable tells further Configure units whether your sh can
3129 sig_count (sig_name.U):
3130 This variable holds a number larger than the largest valid
3131 signal number. This is usually the same as the NSIG macro.
3133 sig_name (sig_name.U):
3134 This variable holds the signal names, space separated. The leading
3135 SIG in signal name is removed. A ZERO is prepended to the
3136 list. This is currently not used.
3138 sig_name_init (sig_name.U):
3139 This variable holds the signal names, enclosed in double quotes and
3140 separated by commas, suitable for use in the SIG_NAME definition
3141 below. A "ZERO" is prepended to the list, and the list is
3142 terminated with a plain 0. The leading SIG in signal names
3143 is removed. See sig_num.
3145 sig_num (sig_name.U):
3146 This variable holds the signal numbers, space separated. A ZERO is
3147 prepended to the list (corresponding to the fake SIGZERO), and
3148 the list is terminated with a 0. Those numbers correspond to
3149 the value of the signal listed in the same place within the
3152 sig_num_init (sig_name.U):
3153 This variable holds the signal numbers, enclosed in double quotes and
3154 separated by commas, suitable for use in the SIG_NUM definition
3155 below. A "ZERO" is prepended to the list, and the list is
3156 terminated with a plain 0.
3158 signal_t (d_voidsig.U):
3159 This variable holds the type of the signal handler (void or int).
3161 sitearch (sitearch.U):
3162 This variable contains the eventual value of the SITEARCH symbol,
3163 which is the name of the private library for this package. It may
3164 have a ~ on the front. It is up to the makefile to eventually create
3165 this directory while performing installation (with ~ substitution).
3166 The standard distribution will put nothing in this directory.
3167 After perl has been installed, users may install their own local
3168 architecture-dependent modules in this directory with
3169 MakeMaker Makefile.PL
3170 or equivalent. See INSTALL for details.
3172 sitearchexp (sitearch.U):
3173 This variable is the ~name expanded version of sitearch, so that you
3174 may use it directly in Makefiles or shell scripts.
3176 sitebin (sitebin.U):
3177 This variable holds the name of the directory in which the user wants
3178 to put add-on publicly executable files for the package in question. It
3179 is most often a local directory such as /usr/local/bin. Programs using
3180 this variable must be prepared to deal with ~name substitution.
3181 The standard distribution will put nothing in this directory.
3182 After perl has been installed, users may install their own local
3183 executables in this directory with
3184 MakeMaker Makefile.PL
3185 or equivalent. See INSTALL for details.
3187 sitebinexp (sitebin.U):
3188 This is the same as the sitebin variable, but is filename expanded at
3189 configuration time, for use in your makefiles.
3191 sitelib (sitelib.U):
3192 This variable contains the eventual value of the SITELIB symbol,
3193 which is the name of the private library for this package. It may
3194 have a ~ on the front. It is up to the makefile to eventually create
3195 this directory while performing installation (with ~ substitution).
3196 The standard distribution will put nothing in this directory.
3197 After perl has been installed, users may install their own local
3198 architecture-independent modules in this directory with
3199 MakeMaker Makefile.PL
3200 or equivalent. See INSTALL for details.
3202 sitelib_stem (sitelib.U):
3203 This variable is $sitelibexp with any trailing version-specific component
3204 removed. The elements in inc_version_list (inc_version_list.U) can
3205 be tacked onto this variable to generate a list of directories to search.
3207 sitelibexp (sitelib.U):
3208 This variable is the ~name expanded version of sitelib, so that you
3209 may use it directly in Makefiles or shell scripts.
3211 siteprefix (siteprefix.U):
3212 This variable holds the full absolute path of the directory below
3213 which the user will install add-on packages.
3214 See INSTALL for usage and examples.
3216 siteprefixexp (siteprefix.U):
3217 This variable holds the full absolute path of the directory below
3218 which the user will install add-on packages. Derived from siteprefix.
3220 sizesize (sizesize.U):
3221 This variable contains the size of a sizetype in bytes.
3223 sizetype (sizetype.U):
3224 This variable defines sizetype to be something like size_t,
3225 unsigned long, or whatever type is used to declare length
3226 parameters for string functions.
3229 This variable is defined but not used by Configure.
3230 The value is a plain '' and is not useful.
3233 This variable is defined but not used by Configure.
3234 The value is a plain '' and is not useful.
3237 This variable holds the extension used to identify shared libraries
3238 (also known as shared objects) on the system. Usually set to 'so'.
3240 sockethdr (d_socket.U):
3241 This variable has any cpp '-I' flags needed for socket support.
3243 socketlib (d_socket.U):
3244 This variable has the names of any libraries needed for socket support.
3246 socksizetype (socksizetype.U):
3247 This variable holds the type used for the size argument
3248 for various socket calls like accept. Usual values include
3249 socklen_t, size_t, and int.
3252 This variable is used internally by Configure to determine the
3253 full pathname (if any) of the sort program. After Configure runs,
3254 the value is reset to a plain "sort" and is not useful.
3256 spackage (package.U):
3257 This variable contains the name of the package being constructed,
3258 with the first letter uppercased, i.e. suitable for starting
3261 spitshell (spitshell.U):
3262 This variable contains the command necessary to spit out a runnable
3263 shell on this system. It is either cat or a grep '-v' for # comments.
3265 sPRId64 (quadfio.U):
3266 This variable, if defined, contains the string used by stdio to
3267 format 64-bit decimal numbers (format 'd') for output.
3269 sPRIeldbl (longdblfio.U):
3270 This variable, if defined, contains the string used by stdio to
3271 format long doubles (format 'e') for output.
3273 sPRIEUldbl (longdblfio.U):
3274 This variable, if defined, contains the string used by stdio to
3275 format long doubles (format 'E') for output.
3276 The 'U' in the name is to separate this from sPRIeldbl so that even
3277 case-blind systems can see the difference.
3279 sPRIfldbl (longdblfio.U):
3280 This variable, if defined, contains the string used by stdio to
3281 format long doubles (format 'f') for output.
3283 sPRIFUldbl (longdblfio.U):
3284 This variable, if defined, contains the string used by stdio to
3285 format long doubles (format 'F') for output.
3286 The 'U' in the name is to separate this from sPRIfldbl so that even
3287 case-blind systems can see the difference.
3289 sPRIgldbl (longdblfio.U):
3290 This variable, if defined, contains the string used by stdio to
3291 format long doubles (format 'g') for output.
3293 sPRIGUldbl (longdblfio.U):
3294 This variable, if defined, contains the string used by stdio to
3295 format long doubles (format 'G') for output.
3296 The 'U' in the name is to separate this from sPRIgldbl so that even
3297 case-blind systems can see the difference.
3299 sPRIi64 (quadfio.U):
3300 This variable, if defined, contains the string used by stdio to
3301 format 64-bit decimal numbers (format 'i') for output.
3303 sPRIo64 (quadfio.U):
3304 This variable, if defined, contains the string used by stdio to
3305 format 64-bit octal numbers (format 'o') for output.
3307 sPRIu64 (quadfio.U):
3308 This variable, if defined, contains the string used by stdio to
3309 format 64-bit unsigned decimal numbers (format 'u') for output.
3311 sPRIx64 (quadfio.U):
3312 This variable, if defined, contains the string used by stdio to
3313 format 64-bit hexadecimal numbers (format 'x') for output.
3315 sPRIXU64 (quadfio.U):
3316 This variable, if defined, contains the string used by stdio to
3317 format 64-bit hExADECimAl numbers (format 'X') for output.
3318 The 'U' in the name is to separate this from sPRIx64 so that even
3319 case-blind systems can see the difference.
3322 This variable holds the path to the package source. It is up to
3323 the Makefile to use this variable and set VPATH accordingly to
3324 find the sources remotely.
3326 sSCNfldbl (longdblfio.U):
3327 This variable, if defined, contains the string used by stdio to
3328 format long doubles (format 'f') for input.
3330 ssizetype (ssizetype.U):
3331 This variable defines ssizetype to be something like ssize_t,
3332 long or int. It is used by functions that return a count
3333 of bytes or an error condition. It must be a signed type.
3334 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3336 startperl (startperl.U):
3337 This variable contains the string to put on the front of a perl
3338 script to make sure (hopefully) that it runs with perl and not some
3339 shell. Of course, that leading line must be followed by the classical
3341 eval 'exec perl -S $0 ${1+"$@"}'
3342 if $running_under_some_shell;
3343 to guarantee perl startup should the shell execute the script. Note
3344 that this magic incatation is not understood by csh.
3346 startsh (startsh.U):
3347 This variable contains the string to put on the front of a shell
3348 script to make sure (hopefully) that it runs with sh and not some
3351 static_ext (Extensions.U):
3352 This variable holds a list of XS extension files we want to
3353 link statically into the package. It is used by Makefile.
3355 stdchar (stdchar.U):
3356 This variable conditionally defines STDCHAR to be the type of char
3357 used in stdio.h. It has the values "unsigned char" or "char".
3359 stdio_base (d_stdstdio.U):
3360 This variable defines how, given a FILE pointer, fp, to access the
3361 _base field (or equivalent) of stdio.h's FILE structure. This will
3362 be used to define the macro FILE_base(fp).
3364 stdio_bufsiz (d_stdstdio.U):
3365 This variable defines how, given a FILE pointer, fp, to determine
3366 the number of bytes store in the I/O buffer pointer to by the
3367 _base field (or equivalent) of stdio.h's FILE structure. This will
3368 be used to define the macro FILE_bufsiz(fp).
3370 stdio_cnt (d_stdstdio.U):
3371 This variable defines how, given a FILE pointer, fp, to access the
3372 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3373 be used to define the macro FILE_cnt(fp).
3375 stdio_filbuf (d_stdstdio.U):
3376 This variable defines how, given a FILE pointer, fp, to tell
3377 stdio to refill it's internal buffers (?). This will
3378 be used to define the macro FILE_filbuf(fp).
3380 stdio_ptr (d_stdstdio.U):
3381 This variable defines how, given a FILE pointer, fp, to access the
3382 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3383 be used to define the macro FILE_ptr(fp).
3385 stdio_stream_array (stdio_streams.U):
3386 This variable tells the name of the array holding the stdio streams.
3387 Usual values include _iob, __iob, and __sF.
3389 strings (i_string.U):
3390 This variable holds the full path of the string header that will be
3391 used. Typically /usr/include/string.h or /usr/include/strings.h.
3394 This variable is defined but not used by Configure.
3395 The value is a plain '' and is not useful.
3397 subversion (patchlevel.U):
3398 The subversion level of this package.
3399 The value of subversion comes from the patchlevel.h file.
3400 In a version number such as 5.6.1, this is the "1".
3401 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3402 This is unique to perl.
3405 This variable holds the place where the manual is located on this
3406 system. It is not the place where the user wants to put his manual
3407 pages. Rather it is the place where Configure may look to find manual
3408 for unix commands (section 1 of the manual usually). See mansrc.
3411 This variable is defined but not used by Configure.
3412 The value is a plain '' and is not useful.
3415 This variable is defined but not used by Configure.
3416 The value is a plain '' and is not useful.
3419 This variable is defined but not used by Configure.
3420 The value is a plain '' and is not useful.
3423 This variable is defined but not used by Configure.
3424 The value is a plain '' and is not useful.
3427 This variable is used internally by Configure to determine the
3428 full pathname (if any) of the test program. After Configure runs,
3429 the value is reset to a plain "test" and is not useful.
3431 timeincl (i_time.U):
3432 This variable holds the full path of the included time header(s).
3434 timetype (d_time.U):
3435 This variable holds the type returned by time(). It can be long,
3436 or time_t on BSD sites (in which case <sys/types.h> should be
3437 included). Anyway, the type Time_t should be used.
3440 This variable is used internally by Configure to determine the
3441 full pathname (if any) of the touch program. After Configure runs,
3442 the value is reset to a plain "touch" and is not useful.
3445 This variable is used internally by Configure to determine the
3446 full pathname (if any) of the tr program. After Configure runs,
3447 the value is reset to a plain "tr" and is not useful.
3450 This variable contains the value to be passed to the tr(1)
3451 command to transliterate a newline. Typical values are
3452 '\012' and '\n'. This is needed for EBCDIC systems where
3453 newline is not necessarily '\012'.
3456 This variable is defined but not used by Configure.
3457 The value is a plain '' and is not useful.
3460 This variable is the size of an U16 in bytes.
3463 This variable contains the C type used for Perl's U16.
3466 This variable is the size of an U32 in bytes.
3469 This variable contains the C type used for Perl's U32.
3472 This variable is the size of an U64 in bytes.
3475 This variable contains the C type used for Perl's U64.
3478 This variable is the size of an U8 in bytes.
3481 This variable contains the C type used for Perl's U8.
3484 This variable contains the format string used for printing a Uid_t.
3486 uidsign (uidsign.U):
3487 This variable contains the signedness of a uidtype.
3488 1 for unsigned, -1 for signed.
3490 uidsize (uidsize.U):
3491 This variable contains the size of a uidtype in bytes.
3493 uidtype (uidtype.U):
3494 This variable defines Uid_t to be something like uid_t, int,
3495 ushort, or whatever type is used to declare user ids in the kernel.
3498 This variable is used internally by Configure to determine the
3499 full pathname (if any) of the uname program. After Configure runs,
3500 the value is reset to a plain "uname" and is not useful.
3503 This variable is used internally by Configure to determine the
3504 full pathname (if any) of the uniq program. After Configure runs,
3505 the value is reset to a plain "uniq" and is not useful.
3507 uquadtype (quadtype.U):
3508 This variable defines Uquad_t to be something like unsigned long,
3509 unsigned int, unsigned long long, uint64_t, or whatever type is
3510 used for 64-bit integers.
3512 use5005threads (usethreads.U):
3513 This variable conditionally defines the USE_5005THREADS symbol,
3514 and indicates that Perl should be built to use the 5.005-based
3515 threading implementation.
3517 use64bitall (use64bits.U):
3518 This variable conditionally defines the USE_64_BIT_ALL symbol,
3519 and indicates that 64-bit integer types should be used
3520 when available. The maximal possible
3521 64-bitness is employed: LP64 or ILP64, meaning that you will
3522 be able to use more than 2 gigabytes of memory. This mode is
3523 even more binary incompatible than USE_64_BIT_INT. You may not
3524 be able to run the resulting executable in a 32-bit CPU at all or
3525 you may need at least to reboot your OS to 64-bit mode.
3527 use64bitint (use64bits.U):
3528 This variable conditionally defines the USE_64_BIT_INT symbol,
3529 and indicates that 64-bit integer types should be used
3530 when available. The minimal possible 64-bitness
3531 is employed, just enough to get 64-bit integers into Perl.
3532 This may mean using for example "long longs", while your memory
3533 may still be limited to 2 gigabytes.
3536 This variable indicates if the system supports dynamic
3537 loading of some sort. See also dlsrc and dlobj.
3539 useithreads (usethreads.U):
3540 This variable conditionally defines the USE_ITHREADS symbol,
3541 and indicates that Perl should be built to use the interpreter-based
3542 threading implementation.
3544 uselargefiles (uselfs.U):
3545 This variable conditionally defines the USE_LARGE_FILES symbol,
3546 and indicates that large file interfaces should be used when
3549 uselongdouble (uselongdbl.U):
3550 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3551 and indicates that long doubles should be used when available.
3553 usemorebits (usemorebits.U):
3554 This variable conditionally defines the USE_MORE_BITS symbol,
3555 and indicates that explicit 64-bit interfaces and long doubles
3556 should be used when available.
3558 usemultiplicity (usemultiplicity.U):
3559 This variable conditionally defines the MULTIPLICITY symbol,
3560 and indicates that Perl should be built to use multiplicity.
3562 usemymalloc (mallocsrc.U):
3563 This variable contains y if the malloc that comes with this package
3564 is desired over the system's version of malloc. People often include
3565 special versions of malloc for effiency, but such versions are often
3566 less portable. See also mallocsrc and mallocobj.
3567 If this is 'y', then -lmalloc is removed from $libs.
3570 This variable contains 'true' or 'false' depending whether the
3571 nm extraction is wanted or not.
3573 useopcode (Extensions.U):
3574 This variable holds either 'true' or 'false' to indicate
3575 whether the Opcode extension should be used. The sole
3576 use for this currently is to allow an easy mechanism
3577 for users to skip the Opcode extension from the Configure
3580 useperlio (useperlio.U):
3581 This variable conditionally defines the USE_PERLIO symbol,
3582 and indicates that the PerlIO abstraction should be
3585 useposix (Extensions.U):
3586 This variable holds either 'true' or 'false' to indicate
3587 whether the POSIX extension should be used. The sole
3588 use for this currently is to allow an easy mechanism
3589 for hints files to indicate that POSIX will not compile
3590 on a particular system.
3593 This variable is set to true when the user agrees to use sfio.
3594 It is set to false when sfio is not available or when the user
3595 explicitely requests not to use sfio. It is here primarily so
3596 that command-line settings can override the auto-detection of
3597 d_sfio without running into a "WHOA THERE".
3599 useshrplib (libperl.U):
3600 This variable is set to 'yes' if the user wishes
3601 to build a shared libperl, and 'no' otherwise.
3603 usesocks (usesocks.U):
3604 This variable conditionally defines the USE_SOCKS symbol,
3605 and indicates that Perl should be built to use SOCKS.
3607 usethreads (usethreads.U):
3608 This variable conditionally defines the USE_THREADS symbol,
3609 and indicates that Perl should be built to use threads.
3611 usevendorprefix (vendorprefix.U):
3612 This variable tells whether the vendorprefix
3613 and consequently other vendor* paths are in use.
3615 usevfork (d_vfork.U):
3616 This variable is set to true when the user accepts to use vfork.
3617 It is set to false when no vfork is available or when the user
3618 explicitely requests not to use vfork.
3621 This variable holds the path of the include files, which is
3622 usually /usr/include. It is mainly used by other Configure units.
3625 This variable is defined but not used by Configure.
3626 The value is a plain '' and is not useful.
3628 uvoformat (perlxvf.U):
3629 This variable contains the format string used for printing
3630 a Perl UV as an unsigned octal integer.
3633 This variable is the size of a UV in bytes.
3636 This variable contains the C type used for Perl's UV.
3638 uvuformat (perlxvf.U):
3639 This variable contains the format string used for printing
3640 a Perl UV as an unsigned decimal integer.
3642 uvxformat (perlxvf.U):
3643 This variable contains the format string used for printing
3644 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3646 uvXUformat (perlxvf.U):
3647 This variable contains the format string used for printing
3648 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3650 vendorarch (vendorarch.U):
3651 This variable contains the value of the PERL_VENDORARCH symbol.
3652 It may have a ~ on the front.
3653 The standard distribution will put nothing in this directory.
3654 Vendors who distribute perl may wish to place their own
3655 architecture-dependent modules and extensions in this directory with
3656 MakeMaker Makefile.PL INSTALLDIRS=vendor
3657 or equivalent. See INSTALL for details.
3659 vendorarchexp (vendorarch.U):
3660 This variable is the ~name expanded version of vendorarch, so that you
3661 may use it directly in Makefiles or shell scripts.
3663 vendorbin (vendorbin.U):
3664 This variable contains the eventual value of the VENDORBIN symbol.
3665 It may have a ~ on the front.
3666 The standard distribution will put nothing in this directory.
3667 Vendors who distribute perl may wish to place additional
3668 binaries in this directory with
3669 MakeMaker Makefile.PL INSTALLDIRS=vendor
3670 or equivalent. See INSTALL for details.
3672 vendorbinexp (vendorbin.U):
3673 This variable is the ~name expanded version of vendorbin, so that you
3674 may use it directly in Makefiles or shell scripts.
3676 vendorlib (vendorlib.U):
3677 This variable contains the eventual value of the VENDORLIB symbol,
3678 which is the name of the private library for this package.
3679 The standard distribution will put nothing in this directory.
3680 Vendors who distribute perl may wish to place their own
3681 modules in this directory with
3682 MakeMaker Makefile.PL INSTALLDIRS=vendor
3683 or equivalent. See INSTALL for details.
3685 vendorlib_stem (vendorlib.U):
3686 This variable is $vendorlibexp with any trailing version-specific component
3687 removed. The elements in inc_version_list (inc_version_list.U) can
3688 be tacked onto this variable to generate a list of directories to search.
3690 vendorlibexp (vendorlib.U):
3691 This variable is the ~name expanded version of vendorlib, so that you
3692 may use it directly in Makefiles or shell scripts.
3694 vendorprefix (vendorprefix.U):
3695 This variable holds the full absolute path of the directory below
3696 which the vendor will install add-on packages.
3697 See INSTALL for usage and examples.
3699 vendorprefixexp (vendorprefix.U):
3700 This variable holds the full absolute path of the directory below
3701 which the vendor will install add-on packages. Derived from vendorprefix.
3703 version (patchlevel.U):
3704 The full version number of this package, such as 5.6.1 (or 5_6_1).
3705 This combines revision, patchlevel, and subversion to get the
3706 full version number, including any possible subversions.
3707 This is suitable for use as a directory name, and hence is
3708 filesystem dependent.
3710 versiononly (versiononly.U):
3711 If set, this symbol indicates that only the version-specific
3712 components of a perl installation should be installed.
3713 This may be useful for making a test installation of a new
3714 version without disturbing the existing installation.
3715 Setting versiononly is equivalent to setting installperl's -v option.
3716 In particular, the non-versioned scripts and programs such as
3717 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3718 (see INSTALL for a more complete list). Nor are the man
3720 Usually, this is undef.
3723 This variable is defined but not used by Configure.
3724 The value is a plain '' and is not useful.
3726 voidflags (voidflags.U):
3727 This variable contains the eventual value of the VOIDFLAGS symbol,
3728 which indicates how much support of the void type is given by this
3729 compiler. See VOIDFLAGS for more info.
3732 This variable holds extra path (space-separated) used to find
3733 libraries on this platform, for example CPU-specific libraries
3734 (on multi-CPU platforms) may be listed here.
3736 xs_apiversion (xs_apiversion.U):
3737 This variable contains the version of the oldest perl binary
3738 compatible with the present perl. perl.c:incpush() and
3739 lib/lib.pm will automatically search in $sitearch for older
3740 directories across major versions back to xs_apiversion.
3741 This is only useful if you have a perl library directory tree
3742 structured like the default one.
3743 See INSTALL for how this works.
3744 The versioned site_perl directory was introduced in 5.005,
3745 so that is the lowest possible value.
3746 Since this can depend on compile time options (such as
3747 bincompat) it is set by Configure. Other non-default sources
3748 of potential incompatibility, such as multiplicity, threads,
3749 debugging, 64bits, sfio, etc., are not checked for currently,
3750 though in principle we could go snooping around in old
3754 This variable is defined but not used by Configure.
3755 The value is a plain '' and is not useful.
3758 This variable is used internally by Configure to determine the
3759 full pathname (if any) of the zip program. After Configure runs,
3760 the value is reset to a plain "zip" and is not useful.