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__fwalk (d__fwalk.U):
344 This variable conditionally defines HAS__FWALK if _fwalk() is
345 available to apply a function to all the file handles.
347 d_access (d_access.U):
348 This variable conditionally defines HAS_ACCESS if the access() system
349 call is available to check for access permissions using real IDs.
351 d_accessx (d_accessx.U):
352 This variable conditionally defines the HAS_ACCESSX symbol, which
353 indicates to the C program that the accessx() routine is available.
356 This variable conditionally defines the HAS_ALARM symbol, which
357 indicates to the C program that the alarm() routine is available.
359 d_archlib (archlib.U):
360 This variable conditionally defines ARCHLIB to hold the pathname
361 of architecture-dependent library files for $package. If
362 $archlib is the same as $privlib, then this is set to undef.
365 This variable conditionally defines the HAS_ATOLF symbol, which
366 indicates to the C program that the atolf() routine is available.
369 This variable conditionally defines the HAS_ATOLL symbol, which
370 indicates to the C program that the atoll() routine is available.
372 d_attribut (d_attribut.U):
373 This variable conditionally defines HASATTRIBUTE, which
374 indicates the C compiler can check for function attributes,
375 such as printf formats.
378 This variable conditionally defines the HAS_BCMP symbol if
379 the bcmp() routine is available to compare strings.
382 This variable conditionally defines the HAS_BCOPY symbol if
383 the bcopy() routine is available to copy strings.
385 d_bincompat5005 (bincompat5005.U):
386 This variable conditionally defines BINCOMPAT5005 so that embed.h
387 can take special action if this version of Perl should be
388 binary-compatible with Perl 5.005. This is impossible for builds
389 that use features like threads and multiplicity it is always $undef
393 This symbol conditionally defines the symbol BSD when running on a
396 d_bsdgetpgrp (d_getpgrp.U):
397 This variable conditionally defines USE_BSD_GETPGRP if
398 getpgrp needs one arguments whereas USG one needs none.
400 d_bsdsetpgrp (d_setpgrp.U):
401 This variable conditionally defines USE_BSD_SETPGRP if
402 setpgrp needs two arguments whereas USG one needs none.
403 See also d_setpgid for a POSIX interface.
406 This variable conditionally defines the HAS_BZERO symbol if
407 the bzero() routine is available to set memory to 0.
409 d_casti32 (d_casti32.U):
410 This variable conditionally defines CASTI32, which indicates
411 whether the C compiler can cast large floats to 32-bit ints.
413 d_castneg (d_castneg.U):
414 This variable conditionally defines CASTNEG, which indicates
415 wether the C compiler can cast negative float to unsigned.
417 d_charvspr (d_vprintf.U):
418 This variable conditionally defines CHARVSPRINTF if this system
419 has vsprintf returning type (char*). The trend seems to be to
420 declare it as "int vsprintf()".
423 This variable conditionally defines the HAS_CHOWN symbol, which
424 indicates to the C program that the chown() routine is available.
426 d_chroot (d_chroot.U):
427 This variable conditionally defines the HAS_CHROOT symbol, which
428 indicates to the C program that the chroot() routine is available.
430 d_chsize (d_chsize.U):
431 This variable conditionally defines the CHSIZE symbol, which
432 indicates to the C program that the chsize() routine is available
433 to truncate files. You might need a -lx to get this routine.
435 d_closedir (d_closedir.U):
436 This variable conditionally defines HAS_CLOSEDIR if closedir() is
440 This variable conditionally defines the HASCONST symbol, which
441 indicates to the C program that this C compiler knows about the
445 This variable conditionally defines the CRYPT symbol, which
446 indicates to the C program that the crypt() routine is available
447 to encrypt passwords and the like.
450 This variable conditionally defines the CSH symbol, which
451 indicates to the C program that the C-shell exists.
453 d_cuserid (d_cuserid.U):
454 This variable conditionally defines the HAS_CUSERID symbol, which
455 indicates to the C program that the cuserid() routine is available
456 to get character login names.
458 d_dbl_dig (d_dbl_dig.U):
459 This variable conditionally defines d_dbl_dig if this system's
460 header files provide DBL_DIG, which is the number of significant
461 digits in a double precision number.
463 d_difftime (d_difftime.U):
464 This variable conditionally defines the HAS_DIFFTIME symbol, which
465 indicates to the C program that the difftime() routine is available.
467 d_dirnamlen (i_dirent.U):
468 This variable conditionally defines DIRNAMLEN, which indicates
469 to the C program that the length of directory entry names is
470 provided by a d_namelen field.
472 d_dlerror (d_dlerror.U):
473 This variable conditionally defines the HAS_DLERROR symbol, which
474 indicates to the C program that the dlerror() routine is available.
476 d_dlopen (d_dlopen.U):
477 This variable conditionally defines the HAS_DLOPEN symbol, which
478 indicates to the C program that the dlopen() routine is available.
480 d_dlsymun (d_dlsymun.U):
481 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
482 indicates that we need to prepend an underscore to the symbol
483 name before calling dlsym().
485 d_dosuid (d_dosuid.U):
486 This variable conditionally defines the symbol DOSUID, which
487 tells the C program that it should insert setuid emulation code
488 on hosts which have setuid #! scripts disabled.
490 d_drand48proto (d_drand48proto.U):
491 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
492 which indicates to the C program that the system provides
493 a prototype for the drand48() function. Otherwise, it is
494 up to the program to supply one.
497 This variable conditionally defines HAS_DUP2 if dup2() is
498 available to duplicate file descriptors.
500 d_eaccess (d_eaccess.U):
501 This variable conditionally defines the HAS_EACCESS symbol, which
502 indicates to the C program that the eaccess() routine is available.
504 d_endgrent (d_endgrent.U):
505 This variable conditionally defines the HAS_ENDGRENT symbol, which
506 indicates to the C program that the endgrent() routine is available
507 for sequential access of the group database.
509 d_endhent (d_endhent.U):
510 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
511 available to close whatever was being used for host queries.
513 d_endnent (d_endnent.U):
514 This variable conditionally defines HAS_ENDNETENT if endnetent() is
515 available to close whatever was being used for network queries.
517 d_endpent (d_endpent.U):
518 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
519 available to close whatever was being used for protocol queries.
521 d_endpwent (d_endpwent.U):
522 This variable conditionally defines the HAS_ENDPWENT symbol, which
523 indicates to the C program that the endpwent() routine is available
524 for sequential access of the passwd database.
526 d_endsent (d_endsent.U):
527 This variable conditionally defines HAS_ENDSERVENT if endservent() is
528 available to close whatever was being used for service queries.
530 d_eofnblk (nblock_io.U):
531 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
532 when reading from a non-blocking I/O source.
535 This variable conditionally defines the symbols EUNICE and VAX, which
536 alerts the C program that it must deal with ideosyncracies of VMS.
538 d_fchmod (d_fchmod.U):
539 This variable conditionally defines the HAS_FCHMOD symbol, which
540 indicates to the C program that the fchmod() routine is available
541 to change mode of opened files.
543 d_fchown (d_fchown.U):
544 This variable conditionally defines the HAS_FCHOWN symbol, which
545 indicates to the C program that the fchown() routine is available
546 to change ownership of opened files.
549 This variable conditionally defines the HAS_FCNTL symbol, and indicates
550 whether the fcntl() function exists
552 d_fcntl_can_lock (d_fcntl_can_lock.U):
553 This variable conditionally defines the FCNTL_CAN_LOCK symbol
554 and indicates whether file locking with fcntl() works.
556 d_fd_macros (d_fd_set.U):
557 This variable contains the eventual value of the HAS_FD_MACROS symbol,
558 which indicates if your C compiler knows about the macros which
559 manipulate an fd_set.
561 d_fd_set (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FD_SET symbol,
563 which indicates if your C compiler knows about the fd_set typedef.
565 d_fds_bits (d_fd_set.U):
566 This variable contains the eventual value of the HAS_FDS_BITS symbol,
567 which indicates if your fd_set typedef contains the fds_bits member.
568 If you have an fd_set typedef, but the dweebs who installed it did
569 a half-fast job and neglected to provide the macros to manipulate
570 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
572 d_fgetpos (d_fgetpos.U):
573 This variable conditionally defines HAS_FGETPOS if fgetpos() is
574 available to get the file position indicator.
576 d_flexfnam (d_flexfnam.U):
577 This variable conditionally defines the FLEXFILENAMES symbol, which
578 indicates that the system supports filenames longer than 14 characters.
581 This variable conditionally defines HAS_FLOCK if flock() is
582 available to do file locking.
585 This variable conditionally defines the HAS_FORK symbol, which
586 indicates to the C program that the fork() routine is available.
588 d_fpathconf (d_pathconf.U):
589 This variable conditionally defines the HAS_FPATHCONF symbol, which
590 indicates to the C program that the pathconf() routine is available
591 to determine file-system related limits and options associated
592 with a given open file descriptor.
594 d_fpos64_t (d_fpos64_t.U):
595 This symbol will be defined if the C compiler supports fpos64_t.
597 d_frexpl (d_frexpl.U):
598 This variable conditionally defines the HAS_FREXPL symbol, which
599 indicates to the C program that the frexpl() routine is available.
601 d_fs_data_s (d_fs_data_s.U):
602 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
603 which indicates that the struct fs_data is supported.
605 d_fseeko (d_fseeko.U):
606 This variable conditionally defines the HAS_FSEEKO symbol, which
607 indicates to the C program that the fseeko() routine is available.
609 d_fsetpos (d_fsetpos.U):
610 This variable conditionally defines HAS_FSETPOS if fsetpos() is
611 available to set the file position indicator.
613 d_fstatfs (d_fstatfs.U):
614 This variable conditionally defines the HAS_FSTATFS symbol, which
615 indicates to the C program that the fstatfs() routine is available.
617 d_fstatvfs (d_statvfs.U):
618 This variable conditionally defines the HAS_FSTATVFS symbol, which
619 indicates to the C program that the fstatvfs() routine is available.
622 This variable conditionally defines the HAS_FSYNC symbol, which
623 indicates to the C program that the fsync() routine is available.
625 d_ftello (d_ftello.U):
626 This variable conditionally defines the HAS_FTELLO symbol, which
627 indicates to the C program that the ftello() routine is available.
630 This variable conditionally defines the HAS_FTIME symbol, which indicates
631 that the ftime() routine exists. The ftime() routine is basically
632 a sub-second accuracy clock.
634 d_Gconvert (d_gconvert.U):
635 This variable holds what Gconvert is defined as to convert
636 floating point numbers into strings. It could be 'gconvert'
637 or a more complex macro emulating gconvert with gcvt() or sprintf.
639 d_Gconvert='gconvert((x),(n),(t),(b))'
640 d_Gconvert='gcvt((x),(n),(b))'
641 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
643 d_getcwd (d_getcwd.U):
644 This variable conditionally defines the HAS_GETCWD symbol, which
645 indicates to the C program that the getcwd() routine is available
646 to get the current working directory.
648 d_getespwnam (d_getespwnam.U):
649 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
650 available to retrieve enchanced (shadow) password entries by name.
652 d_getfsstat (d_getfsstat.U):
653 This variable conditionally defines the HAS_GETFSSTAT symbol, which
654 indicates to the C program that the getfsstat() routine is available.
656 d_getgrent (d_getgrent.U):
657 This variable conditionally defines the HAS_GETGRENT symbol, which
658 indicates to the C program that the getgrent() routine is available
659 for sequential access of the group database.
661 d_getgrps (d_getgrps.U):
662 This variable conditionally defines the HAS_GETGROUPS symbol, which
663 indicates to the C program that the getgroups() routine is available
664 to get the list of process groups.
666 d_gethbyaddr (d_gethbyad.U):
667 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
668 indicates to the C program that the gethostbyaddr() routine is available
669 to look up hosts by their IP addresses.
671 d_gethbyname (d_gethbynm.U):
672 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
673 indicates to the C program that the gethostbyname() routine is available
674 to look up host names in some data base or other.
676 d_gethent (d_gethent.U):
677 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
678 available to look up host names in some data base or another.
680 d_gethname (d_gethname.U):
681 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
682 indicates to the C program that the gethostname() routine may be
683 used to derive the host name.
685 d_gethostprotos (d_gethostprotos.U):
686 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
687 which indicates to the C program that <netdb.h> supplies
688 prototypes for the various gethost*() functions.
689 See also netdbtype.U for probing for various netdb types.
691 d_getlogin (d_getlogin.U):
692 This variable conditionally defines the HAS_GETLOGIN symbol, which
693 indicates to the C program that the getlogin() routine is available
694 to get the login name.
696 d_getmnt (d_getmnt.U):
697 This variable conditionally defines the HAS_GETMNT symbol, which
698 indicates to the C program that the getmnt() routine is available
699 to retrieve one or more mount info blocks by filename.
701 d_getmntent (d_getmntent.U):
702 This variable conditionally defines the HAS_GETMNTENT symbol, which
703 indicates to the C program that the getmntent() routine is available
704 to iterate through mounted files to get their mount info.
706 d_getnbyaddr (d_getnbyad.U):
707 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
708 indicates to the C program that the getnetbyaddr() routine is available
709 to look up networks by their IP addresses.
711 d_getnbyname (d_getnbynm.U):
712 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
713 indicates to the C program that the getnetbyname() routine is available
714 to look up networks by their names.
716 d_getnent (d_getnent.U):
717 This variable conditionally defines HAS_GETNETENT if getnetent() is
718 available to look up network names in some data base or another.
720 d_getnetprotos (d_getnetprotos.U):
721 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
722 which indicates to the C program that <netdb.h> supplies
723 prototypes for the various getnet*() functions.
724 See also netdbtype.U for probing for various netdb types.
726 d_getpagsz (d_getpagsz.U):
727 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
728 is available to get the system page size.
730 d_getpbyname (d_getprotby.U):
731 This variable conditionally defines the HAS_GETPROTOBYNAME
732 symbol, which indicates to the C program that the
733 getprotobyname() routine is available to look up protocols
736 d_getpbynumber (d_getprotby.U):
737 This variable conditionally defines the HAS_GETPROTOBYNUMBER
738 symbol, which indicates to the C program that the
739 getprotobynumber() routine is available to look up protocols
742 d_getpent (d_getpent.U):
743 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
744 available to look up protocols in some data base or another.
746 d_getpgid (d_getpgid.U):
747 This variable conditionally defines the HAS_GETPGID symbol, which
748 indicates to the C program that the getpgid(pid) function
749 is available to get the process group id.
751 d_getpgrp2 (d_getpgrp2.U):
752 This variable conditionally defines the HAS_GETPGRP2 symbol, which
753 indicates to the C program that the getpgrp2() (as in DG/UX) routine
754 is available to get the current process group.
756 d_getpgrp (d_getpgrp.U):
757 This variable conditionally defines HAS_GETPGRP if getpgrp() is
758 available to get the current process group.
760 d_getppid (d_getppid.U):
761 This variable conditionally defines the HAS_GETPPID symbol, which
762 indicates to the C program that the getppid() routine is available
763 to get the parent process ID.
765 d_getprior (d_getprior.U):
766 This variable conditionally defines HAS_GETPRIORITY if getpriority()
767 is available to get a process's priority.
769 d_getprotoprotos (d_getprotoprotos.U):
770 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
771 which indicates to the C program that <netdb.h> supplies
772 prototypes for the various getproto*() functions.
773 See also netdbtype.U for probing for various netdb types.
775 d_getprpwnam (d_getprpwnam.U):
776 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
777 available to retrieve protected (shadow) password entries by name.
779 d_getpwent (d_getpwent.U):
780 This variable conditionally defines the HAS_GETPWENT symbol, which
781 indicates to the C program that the getpwent() routine is available
782 for sequential access of the passwd database.
784 d_getsbyname (d_getsrvby.U):
785 This variable conditionally defines the HAS_GETSERVBYNAME
786 symbol, which indicates to the C program that the
787 getservbyname() routine is available to look up services
790 d_getsbyport (d_getsrvby.U):
791 This variable conditionally defines the HAS_GETSERVBYPORT
792 symbol, which indicates to the C program that the
793 getservbyport() routine is available to look up services
796 d_getsent (d_getsent.U):
797 This variable conditionally defines HAS_GETSERVENT if getservent() is
798 available to look up network services in some data base or another.
800 d_getservprotos (d_getservprotos.U):
801 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
802 which indicates to the C program that <netdb.h> supplies
803 prototypes for the various getserv*() functions.
804 See also netdbtype.U for probing for various netdb types.
806 d_getspnam (d_getspnam.U):
807 This variable conditionally defines HAS_GETSPNAM if getspnam() is
808 available to retrieve SysV shadow password entries by name.
810 d_gettimeod (d_ftime.U):
811 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
812 indicates that the gettimeofday() system call exists (to obtain a
813 sub-second accuracy clock). You should probably include <sys/resource.h>.
815 d_gnulibc (d_gnulibc.U):
816 Defined if we're dealing with the GNU C Library.
818 d_grpasswd (i_grp.U):
819 This variable conditionally defines GRPASSWD, which indicates
820 that struct group in <grp.h> contains gr_passwd.
822 d_hasmntopt (d_hasmntopt.U):
823 This variable conditionally defines the HAS_HASMNTOPT symbol, which
824 indicates to the C program that the hasmntopt() routine is available
825 to query the mount options of file systems.
828 This variable conditionally defines HAS_HTONL if htonl() and its
829 friends are available to do network order byte swapping.
832 This variable conditionally defines the HAS_ICONV symbol, which
833 indicates to the C program that the iconv() routine is available.
835 d_index (d_strchr.U):
836 This variable conditionally defines HAS_INDEX if index() and
837 rindex() are available for string searching.
839 d_inetaton (d_inetaton.U):
840 This variable conditionally defines the HAS_INET_ATON symbol, which
841 indicates to the C program that the inet_aton() function is available
842 to parse IP address "dotted-quad" strings.
844 d_int64_t (d_int64_t.U):
845 This symbol will be defined if the C compiler supports int64_t.
847 d_isascii (d_isascii.U):
848 This variable conditionally defines the HAS_ISASCII constant,
849 which indicates to the C program that isascii() is available.
852 This variable conditionally defines the HAS_ISNAN symbol, which
853 indicates to the C program that the isnan() routine is available.
855 d_isnanl (d_isnanl.U):
856 This variable conditionally defines the HAS_ISNANL symbol, which
857 indicates to the C program that the isnanl() routine is available.
859 d_killpg (d_killpg.U):
860 This variable conditionally defines the HAS_KILLPG symbol, which
861 indicates to the C program that the killpg() routine is available
862 to kill process groups.
864 d_lchown (d_lchown.U):
865 This variable conditionally defines the HAS_LCHOWN symbol, which
866 indicates to the C program that the lchown() routine is available
867 to operate on a symbolic link (instead of following the link).
869 d_ldbl_dig (d_ldbl_dig.U):
870 This variable conditionally defines d_ldbl_dig if this system's
871 header files provide LDBL_DIG, which is the number of significant
872 digits in a long double precision number.
875 This variable conditionally defines HAS_LINK if link() is
876 available to create hard links.
878 d_locconv (d_locconv.U):
879 This variable conditionally defines HAS_LOCALECONV if localeconv() is
880 available for numeric and monetary formatting conventions.
883 This variable conditionally defines HAS_LOCKF if lockf() is
884 available to do file locking.
886 d_longdbl (d_longdbl.U):
887 This variable conditionally defines HAS_LONG_DOUBLE if
888 the long double type is supported.
890 d_longlong (d_longlong.U):
891 This variable conditionally defines HAS_LONG_LONG if
892 the long long type is supported.
894 d_lseekproto (d_lseekproto.U):
895 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
896 which indicates to the C program that the system provides
897 a prototype for the lseek() function. Otherwise, it is
898 up to the program to supply one.
901 This variable conditionally defines HAS_LSTAT if lstat() is
902 available to do file stats on symbolic links.
904 d_madvise (d_madvise.U):
905 This variable conditionally defines HAS_MADVISE if madvise() is
906 available to map a file into memory.
909 This variable conditionally defines the HAS_MBLEN symbol, which
910 indicates to the C program that the mblen() routine is available
911 to find the number of bytes in a multibye character.
913 d_mbstowcs (d_mbstowcs.U):
914 This variable conditionally defines the HAS_MBSTOWCS symbol, which
915 indicates to the C program that the mbstowcs() routine is available
916 to convert a multibyte string into a wide character string.
918 d_mbtowc (d_mbtowc.U):
919 This variable conditionally defines the HAS_MBTOWC symbol, which
920 indicates to the C program that the mbtowc() routine is available
921 to convert multibyte to a wide character.
923 d_memchr (d_memchr.U):
924 This variable conditionally defines the HAS_MEMCHR symbol, which
925 indicates to the C program that the memchr() routine is available
926 to locate characters within a C string.
928 d_memcmp (d_memcmp.U):
929 This variable conditionally defines the HAS_MEMCMP symbol, which
930 indicates to the C program that the memcmp() routine is available
931 to compare blocks of memory.
933 d_memcpy (d_memcpy.U):
934 This variable conditionally defines the HAS_MEMCPY symbol, which
935 indicates to the C program that the memcpy() routine is available
936 to copy blocks of memory.
938 d_memmove (d_memmove.U):
939 This variable conditionally defines the HAS_MEMMOVE symbol, which
940 indicates to the C program that the memmove() routine is available
941 to copy potentatially overlapping blocks of memory.
943 d_memset (d_memset.U):
944 This variable conditionally defines the HAS_MEMSET symbol, which
945 indicates to the C program that the memset() routine is available
946 to set blocks of memory.
949 This variable conditionally defines the HAS_MKDIR symbol, which
950 indicates to the C program that the mkdir() routine is available
951 to create directories..
953 d_mkdtemp (d_mkdtemp.U):
954 This variable conditionally defines the HAS_MKDTEMP symbol, which
955 indicates to the C program that the mkdtemp() routine is available
956 to exclusively create a uniquely named temporary directory.
958 d_mkfifo (d_mkfifo.U):
959 This variable conditionally defines the HAS_MKFIFO symbol, which
960 indicates to the C program that the mkfifo() routine is available.
962 d_mkstemp (d_mkstemp.U):
963 This variable conditionally defines the HAS_MKSTEMP symbol, which
964 indicates to the C program that the mkstemp() routine is available
965 to exclusively create and open a uniquely named temporary file.
967 d_mkstemps (d_mkstemps.U):
968 This variable conditionally defines the HAS_MKSTEMPS symbol, which
969 indicates to the C program that the mkstemps() routine is available
970 to exclusively create and open a uniquely named (with a suffix)
973 d_mktime (d_mktime.U):
974 This variable conditionally defines the HAS_MKTIME symbol, which
975 indicates to the C program that the mktime() routine is available.
978 This variable conditionally defines HAS_MMAP if mmap() is
979 available to map a file into memory.
982 This variable conditionally defines the HAS_MODFL symbol, which
983 indicates to the C program that the modfl() routine is available.
985 d_mprotect (d_mprotect.U):
986 This variable conditionally defines HAS_MPROTECT if mprotect() is
987 available to modify the access protection of a memory mapped file.
990 This variable conditionally defines the HAS_MSG symbol, which
991 indicates that the entire msg*(2) library is present.
993 d_msg_ctrunc (d_socket.U):
994 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
995 which indicates that the MSG_CTRUNC is available. #ifdef is
996 not enough because it may be an enum, glibc has been known to do this.
998 d_msg_dontroute (d_socket.U):
999 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1000 which indicates that the MSG_DONTROUTE is available. #ifdef is
1001 not enough because it may be an enum, glibc has been known to do this.
1003 d_msg_oob (d_socket.U):
1004 This variable conditionally defines the HAS_MSG_OOB symbol,
1005 which indicates that the MSG_OOB is available. #ifdef is
1006 not enough because it may be an enum, glibc has been known to do this.
1008 d_msg_peek (d_socket.U):
1009 This variable conditionally defines the HAS_MSG_PEEK symbol,
1010 which indicates that the MSG_PEEK is available. #ifdef is
1011 not enough because it may be an enum, glibc has been known to do this.
1013 d_msg_proxy (d_socket.U):
1014 This variable conditionally defines the HAS_MSG_PROXY symbol,
1015 which indicates that the MSG_PROXY is available. #ifdef is
1016 not enough because it may be an enum, glibc has been known to do this.
1018 d_msgctl (d_msgctl.U):
1019 This variable conditionally defines the HAS_MSGCTL symbol, which
1020 indicates to the C program that the msgctl() routine is available.
1022 d_msgget (d_msgget.U):
1023 This variable conditionally defines the HAS_MSGGET symbol, which
1024 indicates to the C program that the msgget() routine is available.
1026 d_msgrcv (d_msgrcv.U):
1027 This variable conditionally defines the HAS_MSGRCV symbol, which
1028 indicates to the C program that the msgrcv() routine is available.
1030 d_msgsnd (d_msgsnd.U):
1031 This variable conditionally defines the HAS_MSGSND symbol, which
1032 indicates to the C program that the msgsnd() routine is available.
1034 d_msync (d_msync.U):
1035 This variable conditionally defines HAS_MSYNC if msync() is
1036 available to synchronize a mapped file.
1038 d_munmap (d_munmap.U):
1039 This variable conditionally defines HAS_MUNMAP if munmap() is
1040 available to unmap a region mapped by mmap().
1042 d_mymalloc (mallocsrc.U):
1043 This variable conditionally defines MYMALLOC in case other parts
1044 of the source want to take special action if MYMALLOC is used.
1045 This may include different sorts of profiling or error detection.
1048 This variable conditionally defines the HAS_NICE symbol, which
1049 indicates to the C program that the nice() routine is available.
1051 d_nv_preserves_uv (perlxv.U):
1052 This variable indicates whether a variable of type nvtype
1053 can preserve all the bits a variable of type uvtype.
1055 d_nv_preserves_uv_bits (perlxv.U):
1056 This variable indicates how many of bits type uvtype
1057 a variable nvtype can preserve.
1059 d_off64_t (d_off64_t.U):
1060 This symbol will be defined if the C compiler supports off64_t.
1062 d_old_pthread_create_joinable (d_pthrattrj.U):
1063 This variable conditionally defines pthread_create_joinable.
1064 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1066 d_oldpthreads (usethreads.U):
1067 This variable conditionally defines the OLD_PTHREADS_API symbol,
1068 and indicates that Perl should be built to use the old
1069 draft POSIX threads API. This is only potentially meaningful if
1072 d_oldsock (d_socket.U):
1073 This variable conditionally defines the OLDSOCKET symbol, which
1074 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1076 d_open3 (d_open3.U):
1077 This variable conditionally defines the HAS_OPEN3 manifest constant,
1078 which indicates to the C program that the 3 argument version of
1079 the open(2) function is available.
1081 d_pathconf (d_pathconf.U):
1082 This variable conditionally defines the HAS_PATHCONF symbol, which
1083 indicates to the C program that the pathconf() routine is available
1084 to determine file-system related limits and options associated
1085 with a given filename.
1087 d_pause (d_pause.U):
1088 This variable conditionally defines the HAS_PAUSE symbol, which
1089 indicates to the C program that the pause() routine is available
1090 to suspend a process until a signal is received.
1092 d_perl_otherlibdirs (otherlibdirs.U):
1093 This variable conditionally defines PERL_OTHERLIBDIRS, which
1094 contains a colon-separated set of paths for the perl binary to
1095 include in @INC. See also otherlibdirs.
1097 d_phostname (d_gethname.U):
1098 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1099 contains the shell command which, when fed to popen(), may be
1100 used to derive the host name.
1103 This variable conditionally defines the HAS_PIPE symbol, which
1104 indicates to the C program that the pipe() routine is available
1105 to create an inter-process channel.
1108 This variable conditionally defines the HAS_POLL symbol, which
1109 indicates to the C program that the poll() routine is available
1110 to poll active file descriptors.
1112 d_portable (d_portable.U):
1113 This variable conditionally defines the PORTABLE symbol, which
1114 indicates to the C program that it should not assume that it is
1115 running on the machine it was compiled on.
1117 d_PRId64 (quadfio.U):
1118 This variable conditionally defines the PERL_PRId64 symbol, which
1119 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1121 d_PRIeldbl (longdblfio.U):
1122 This variable conditionally defines the PERL_PRIfldbl symbol, which
1123 indiciates that stdio has a symbol to print long doubles.
1125 d_PRIEUldbl (longdblfio.U):
1126 This variable conditionally defines the PERL_PRIfldbl symbol, which
1127 indiciates that stdio has a symbol to print long doubles.
1128 The 'U' in the name is to separate this from d_PRIeldbl so that even
1129 case-blind systems can see the difference.
1131 d_PRIfldbl (longdblfio.U):
1132 This variable conditionally defines the PERL_PRIfldbl symbol, which
1133 indiciates that stdio has a symbol to print long doubles.
1135 d_PRIFUldbl (longdblfio.U):
1136 This variable conditionally defines the PERL_PRIfldbl symbol, which
1137 indiciates that stdio has a symbol to print long doubles.
1138 The 'U' in the name is to separate this from d_PRIfldbl so that even
1139 case-blind systems can see the difference.
1141 d_PRIgldbl (longdblfio.U):
1142 This variable conditionally defines the PERL_PRIfldbl symbol, which
1143 indiciates that stdio has a symbol to print long doubles.
1145 d_PRIGUldbl (longdblfio.U):
1146 This variable conditionally defines the PERL_PRIfldbl symbol, which
1147 indiciates that stdio has a symbol to print long doubles.
1148 The 'U' in the name is to separate this from d_PRIgldbl so that even
1149 case-blind systems can see the difference.
1151 d_PRIi64 (quadfio.U):
1152 This variable conditionally defines the PERL_PRIi64 symbol, which
1153 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1155 d_PRIo64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRIo64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit octal numbers.
1159 d_PRIu64 (quadfio.U):
1160 This variable conditionally defines the PERL_PRIu64 symbol, which
1161 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1164 d_PRIx64 (quadfio.U):
1165 This variable conditionally defines the PERL_PRIx64 symbol, which
1166 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1168 d_PRIXU64 (quadfio.U):
1169 This variable conditionally defines the PERL_PRIXU64 symbol, which
1170 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1171 The 'U' in the name is to separate this from d_PRIx64 so that even
1172 case-blind systems can see the difference.
1174 d_pthread_yield (d_pthread_y.U):
1175 This variable conditionally defines the HAS_PTHREAD_YIELD
1176 symbol if the pthread_yield routine is available to yield
1177 the execution of the current thread.
1180 This variable conditionally defines PWAGE, which indicates
1181 that struct passwd contains pw_age.
1183 d_pwchange (i_pwd.U):
1184 This variable conditionally defines PWCHANGE, which indicates
1185 that struct passwd contains pw_change.
1187 d_pwclass (i_pwd.U):
1188 This variable conditionally defines PWCLASS, which indicates
1189 that struct passwd contains pw_class.
1191 d_pwcomment (i_pwd.U):
1192 This variable conditionally defines PWCOMMENT, which indicates
1193 that struct passwd contains pw_comment.
1195 d_pwexpire (i_pwd.U):
1196 This variable conditionally defines PWEXPIRE, which indicates
1197 that struct passwd contains pw_expire.
1199 d_pwgecos (i_pwd.U):
1200 This variable conditionally defines PWGECOS, which indicates
1201 that struct passwd contains pw_gecos.
1203 d_pwpasswd (i_pwd.U):
1204 This variable conditionally defines PWPASSWD, which indicates
1205 that struct passwd contains pw_passwd.
1207 d_pwquota (i_pwd.U):
1208 This variable conditionally defines PWQUOTA, which indicates
1209 that struct passwd contains pw_quota.
1211 d_qgcvt (d_qgcvt.U):
1212 This variable conditionally defines the HAS_QGCVT symbol, which
1213 indicates to the C program that the qgcvt() routine is available.
1215 d_quad (quadtype.U):
1216 This variable, if defined, tells that there's a 64-bit integer type,
1219 d_readdir (d_readdir.U):
1220 This variable conditionally defines HAS_READDIR if readdir() is
1221 available to read directory entries.
1223 d_readlink (d_readlink.U):
1224 This variable conditionally defines the HAS_READLINK symbol, which
1225 indicates to the C program that the readlink() routine is available
1226 to read the value of a symbolic link.
1228 d_rename (d_rename.U):
1229 This variable conditionally defines the HAS_RENAME symbol, which
1230 indicates to the C program that the rename() routine is available
1233 d_rewinddir (d_readdir.U):
1234 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1237 d_rmdir (d_rmdir.U):
1238 This variable conditionally defines HAS_RMDIR if rmdir() is
1239 available to remove directories.
1241 d_safebcpy (d_safebcpy.U):
1242 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1243 the bcopy() routine can do overlapping copies.
1245 d_safemcpy (d_safemcpy.U):
1246 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1247 the memcpy() routine can do overlapping copies.
1249 d_sanemcmp (d_sanemcmp.U):
1250 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1251 the memcpy() routine is available and can be used to compare relative
1252 magnitudes of chars with their high bits set.
1254 d_sbrkproto (d_sbrkproto.U):
1255 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1256 which indicates to the C program that the system provides
1257 a prototype for the sbrk() function. Otherwise, it is
1258 up to the program to supply one.
1260 d_sched_yield (d_pthread_y.U):
1261 This variable conditionally defines the HAS_SCHED_YIELD
1262 symbol if the sched_yield routine is available to yield
1263 the execution of the current thread.
1265 d_scm_rights (d_socket.U):
1266 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1267 which indicates that the SCM_RIGHTS is available. #ifdef is
1268 not enough because it may be an enum, glibc has been known to do this.
1270 d_SCNfldbl (longdblfio.U):
1271 This variable conditionally defines the PERL_PRIfldbl symbol, which
1272 indiciates that stdio has a symbol to scan long doubles.
1274 d_seekdir (d_readdir.U):
1275 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1278 d_select (d_select.U):
1279 This variable conditionally defines HAS_SELECT if select() is
1280 available to select active file descriptors. A <sys/time.h>
1281 inclusion may be necessary for the timeout field.
1284 This variable conditionally defines the HAS_SEM symbol, which
1285 indicates that the entire sem*(2) library is present.
1287 d_semctl (d_semctl.U):
1288 This variable conditionally defines the HAS_SEMCTL symbol, which
1289 indicates to the C program that the semctl() routine is available.
1291 d_semctl_semid_ds (d_union_semun.U):
1292 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1293 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1295 d_semctl_semun (d_union_semun.U):
1296 This variable conditionally defines USE_SEMCTL_SEMUN, which
1297 indicates that union semun is to be used for semctl IPC_STAT.
1299 d_semget (d_semget.U):
1300 This variable conditionally defines the HAS_SEMGET symbol, which
1301 indicates to the C program that the semget() routine is available.
1303 d_semop (d_semop.U):
1304 This variable conditionally defines the HAS_SEMOP symbol, which
1305 indicates to the C program that the semop() routine is available.
1307 d_setegid (d_setegid.U):
1308 This variable conditionally defines the HAS_SETEGID symbol, which
1309 indicates to the C program that the setegid() routine is available
1310 to change the effective gid of the current program.
1312 d_seteuid (d_seteuid.U):
1313 This variable conditionally defines the HAS_SETEUID symbol, which
1314 indicates to the C program that the seteuid() routine is available
1315 to change the effective uid of the current program.
1317 d_setgrent (d_setgrent.U):
1318 This variable conditionally defines the HAS_SETGRENT symbol, which
1319 indicates to the C program that the setgrent() routine is available
1320 for initializing sequential access to the group database.
1322 d_setgrps (d_setgrps.U):
1323 This variable conditionally defines the HAS_SETGROUPS symbol, which
1324 indicates to the C program that the setgroups() routine is available
1325 to set the list of process groups.
1327 d_sethent (d_sethent.U):
1328 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1331 d_setlinebuf (d_setlnbuf.U):
1332 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1333 indicates to the C program that the setlinebuf() routine is available
1334 to change stderr or stdout from block-buffered or unbuffered to a
1337 d_setlocale (d_setlocale.U):
1338 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1339 available to handle locale-specific ctype implementations.
1341 d_setnent (d_setnent.U):
1342 This variable conditionally defines HAS_SETNETENT if setnetent() is
1345 d_setpent (d_setpent.U):
1346 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1349 d_setpgid (d_setpgid.U):
1350 This variable conditionally defines the HAS_SETPGID symbol if the
1351 setpgid(pid, gpid) function is available to set process group ID.
1353 d_setpgrp2 (d_setpgrp2.U):
1354 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1355 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1356 is available to set the current process group.
1358 d_setpgrp (d_setpgrp.U):
1359 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1360 available to set the current process group.
1362 d_setprior (d_setprior.U):
1363 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1364 is available to set a process's priority.
1366 d_setproctitle (d_setproctitle.U):
1367 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1368 which indicates to the C program that the setproctitle() routine
1371 d_setpwent (d_setpwent.U):
1372 This variable conditionally defines the HAS_SETPWENT symbol, which
1373 indicates to the C program that the setpwent() routine is available
1374 for initializing sequential access to the passwd database.
1376 d_setregid (d_setregid.U):
1377 This variable conditionally defines HAS_SETREGID if setregid() is
1378 available to change the real and effective gid of the current
1381 d_setresgid (d_setregid.U):
1382 This variable conditionally defines HAS_SETRESGID if setresgid() is
1383 available to change the real, effective and saved gid of the current
1386 d_setresuid (d_setreuid.U):
1387 This variable conditionally defines HAS_SETREUID if setresuid() is
1388 available to change the real, effective and saved uid of the current
1391 d_setreuid (d_setreuid.U):
1392 This variable conditionally defines HAS_SETREUID if setreuid() is
1393 available to change the real and effective uid of the current
1396 d_setrgid (d_setrgid.U):
1397 This variable conditionally defines the HAS_SETRGID symbol, which
1398 indicates to the C program that the setrgid() routine is available
1399 to change the real gid of the current program.
1401 d_setruid (d_setruid.U):
1402 This variable conditionally defines the HAS_SETRUID symbol, which
1403 indicates to the C program that the setruid() routine is available
1404 to change the real uid of the current program.
1406 d_setsent (d_setsent.U):
1407 This variable conditionally defines HAS_SETSERVENT if setservent() is
1410 d_setsid (d_setsid.U):
1411 This variable conditionally defines HAS_SETSID if setsid() is
1412 available to set the process group ID.
1414 d_setvbuf (d_setvbuf.U):
1415 This variable conditionally defines the HAS_SETVBUF symbol, which
1416 indicates to the C program that the setvbuf() routine is available
1417 to change buffering on an open stdio stream.
1420 This variable conditionally defines the USE_SFIO symbol,
1421 and indicates whether sfio is available (and should be used).
1424 This variable conditionally defines the HAS_SHM symbol, which
1425 indicates that the entire shm*(2) library is present.
1427 d_shmat (d_shmat.U):
1428 This variable conditionally defines the HAS_SHMAT symbol, which
1429 indicates to the C program that the shmat() routine is available.
1431 d_shmatprototype (d_shmat.U):
1432 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1433 symbol, which indicates that sys/shm.h has a prototype for
1436 d_shmctl (d_shmctl.U):
1437 This variable conditionally defines the HAS_SHMCTL symbol, which
1438 indicates to the C program that the shmctl() routine is available.
1440 d_shmdt (d_shmdt.U):
1441 This variable conditionally defines the HAS_SHMDT symbol, which
1442 indicates to the C program that the shmdt() routine is available.
1444 d_shmget (d_shmget.U):
1445 This variable conditionally defines the HAS_SHMGET symbol, which
1446 indicates to the C program that the shmget() routine is available.
1448 d_sigaction (d_sigaction.U):
1449 This variable conditionally defines the HAS_SIGACTION symbol, which
1450 indicates that the Vr4 sigaction() routine is available.
1452 d_sigsetjmp (d_sigsetjmp.U):
1453 This variable conditionally defines the HAS_SIGSETJMP symbol,
1454 which indicates that the sigsetjmp() routine is available to
1455 call setjmp() and optionally save the process's signal mask.
1457 d_socket (d_socket.U):
1458 This variable conditionally defines HAS_SOCKET, which indicates
1459 that the BSD socket interface is supported.
1461 d_socklen_t (d_socklen_t.U):
1462 This symbol will be defined if the C compiler supports socklen_t.
1464 d_sockpair (d_socket.U):
1465 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1466 indicates that the BSD socketpair() is supported.
1468 d_socks5_init (d_socks5_init.U):
1469 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1470 indicates to the C program that the socks5_init() routine is available.
1472 d_sqrtl (d_sqrtl.U):
1473 This variable conditionally defines the HAS_SQRTL symbol, which
1474 indicates to the C program that the sqrtl() routine is available.
1476 d_statblks (d_statblks.U):
1477 This variable conditionally defines USE_STAT_BLOCKS
1478 if this system has a stat structure declaring
1479 st_blksize and st_blocks.
1481 d_statfs_f_flags (d_statfs_f_flags.U):
1482 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1483 symbol, which indicates to struct statfs from has f_flags member.
1484 This kind of struct statfs is coming from sys/mount.h (BSD),
1485 not from sys/statfs.h (SYSV).
1487 d_statfs_s (d_statfs_s.U):
1488 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1489 which indicates that the struct statfs is supported.
1491 d_statvfs (d_statvfs.U):
1492 This variable conditionally defines the HAS_STATVFS symbol, which
1493 indicates to the C program that the statvfs() routine is available.
1495 d_stdio_cnt_lval (d_stdstdio.U):
1496 This variable conditionally defines STDIO_CNT_LVALUE if the
1497 FILE_cnt macro can be used as an lvalue.
1499 d_stdio_ptr_lval (d_stdstdio.U):
1500 This variable conditionally defines STDIO_PTR_LVALUE if the
1501 FILE_ptr macro can be used as an lvalue.
1503 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1504 This symbol is defined if using the FILE_ptr macro as an lvalue
1505 to increase the pointer by n leaves File_cnt(fp) unchanged.
1507 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1508 This symbol is defined if using the FILE_ptr macro as an lvalue
1509 to increase the pointer by n has the side effect of decreasing the
1510 value of File_cnt(fp) by n.
1512 d_stdio_stream_array (stdio_streams.U):
1513 This variable tells whether there is an array holding
1516 d_stdiobase (d_stdstdio.U):
1517 This variable conditionally defines USE_STDIO_BASE if this system
1518 has a FILE structure declaring a usable _base field (or equivalent)
1521 d_stdstdio (d_stdstdio.U):
1522 This variable conditionally defines USE_STDIO_PTR if this system
1523 has a FILE structure declaring usable _ptr and _cnt fields (or
1524 equivalent) in stdio.h.
1526 d_strchr (d_strchr.U):
1527 This variable conditionally defines HAS_STRCHR if strchr() and
1528 strrchr() are available for string searching.
1530 d_strcoll (d_strcoll.U):
1531 This variable conditionally defines HAS_STRCOLL if strcoll() is
1532 available to compare strings using collating information.
1534 d_strctcpy (d_strctcpy.U):
1535 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1536 indicates to the C program that this C compiler knows how to copy
1539 d_strerrm (d_strerror.U):
1540 This variable holds what Strerrr is defined as to translate an error
1541 code condition into an error message string. It could be 'strerror'
1542 or a more complex macro emulating strrror with sys_errlist[], or the
1543 "unknown" string when both strerror and sys_errlist are missing.
1545 d_strerror (d_strerror.U):
1546 This variable conditionally defines HAS_STRERROR if strerror() is
1547 available to translate error numbers to strings.
1549 d_strtod (d_strtod.U):
1550 This variable conditionally defines the HAS_STRTOD symbol, which
1551 indicates to the C program that the strtod() routine is available
1552 to provide better numeric string conversion than atof().
1554 d_strtol (d_strtol.U):
1555 This variable conditionally defines the HAS_STRTOL symbol, which
1556 indicates to the C program that the strtol() routine is available
1557 to provide better numeric string conversion than atoi() and friends.
1559 d_strtold (d_strtold.U):
1560 This variable conditionally defines the HAS_STRTOLD symbol, which
1561 indicates to the C program that the strtold() routine is available.
1563 d_strtoll (d_strtoll.U):
1564 This variable conditionally defines the HAS_STRTOLL symbol, which
1565 indicates to the C program that the strtoll() routine is available.
1567 d_strtoq (d_strtoq.U):
1568 This variable conditionally defines the HAS_STRTOQ symbol, which
1569 indicates to the C program that the strtoq() routine is available.
1571 d_strtoul (d_strtoul.U):
1572 This variable conditionally defines the HAS_STRTOUL symbol, which
1573 indicates to the C program that the strtoul() routine is available
1574 to provide conversion of strings to unsigned long.
1576 d_strtoull (d_strtoull.U):
1577 This variable conditionally defines the HAS_STRTOULL symbol, which
1578 indicates to the C program that the strtoull() routine is available.
1580 d_strtouq (d_strtouq.U):
1581 This variable conditionally defines the HAS_STRTOUQ symbol, which
1582 indicates to the C program that the strtouq() routine is available.
1584 d_strxfrm (d_strxfrm.U):
1585 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1586 available to transform strings.
1588 d_suidsafe (d_dosuid.U):
1589 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1590 if setuid scripts can be secure. This test looks in /dev/fd/.
1592 d_symlink (d_symlink.U):
1593 This variable conditionally defines the HAS_SYMLINK symbol, which
1594 indicates to the C program that the symlink() routine is available
1595 to create symbolic links.
1597 d_syscall (d_syscall.U):
1598 This variable conditionally defines HAS_SYSCALL if syscall() is
1599 available call arbitrary system calls.
1601 d_sysconf (d_sysconf.U):
1602 This variable conditionally defines the HAS_SYSCONF symbol, which
1603 indicates to the C program that the sysconf() routine is available
1604 to determine system related limits and options.
1606 d_sysernlst (d_strerror.U):
1607 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1608 is available to translate error numbers to the symbolic name.
1610 d_syserrlst (d_strerror.U):
1611 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1612 available to translate error numbers to strings.
1614 d_system (d_system.U):
1615 This variable conditionally defines HAS_SYSTEM if system() is
1616 available to issue a shell command.
1618 d_tcgetpgrp (d_tcgtpgrp.U):
1619 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1620 indicates to the C program that the tcgetpgrp() routine is available.
1621 to get foreground process group ID.
1623 d_tcsetpgrp (d_tcstpgrp.U):
1624 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1625 indicates to the C program that the tcsetpgrp() routine is available
1626 to set foreground process group ID.
1628 d_telldir (d_readdir.U):
1629 This variable conditionally defines HAS_TELLDIR if telldir() is
1632 d_telldirproto (d_telldirproto.U):
1633 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1634 which indicates to the C program that the system provides
1635 a prototype for the telldir() function. Otherwise, it is
1636 up to the program to supply one.
1639 This variable conditionally defines the HAS_TIME symbol, which indicates
1640 that the time() routine exists. The time() routine is normaly
1641 provided on UNIX systems.
1643 d_times (d_times.U):
1644 This variable conditionally defines the HAS_TIMES symbol, which indicates
1645 that the times() routine exists. The times() routine is normaly
1646 provided on UNIX systems. You may have to include <sys/times.h>.
1648 d_truncate (d_truncate.U):
1649 This variable conditionally defines HAS_TRUNCATE if truncate() is
1650 available to truncate files.
1652 d_tzname (d_tzname.U):
1653 This variable conditionally defines HAS_TZNAME if tzname[] is
1654 available to access timezone names.
1656 d_umask (d_umask.U):
1657 This variable conditionally defines the HAS_UMASK symbol, which
1658 indicates to the C program that the umask() routine is available.
1659 to set and get the value of the file creation mask.
1661 d_uname (d_gethname.U):
1662 This variable conditionally defines the HAS_UNAME symbol, which
1663 indicates to the C program that the uname() routine may be
1664 used to derive the host name.
1666 d_union_semun (d_union_semun.U):
1667 This variable conditionally defines HAS_UNION_SEMUN if the
1668 union semun is defined by including <sys/sem.h>.
1670 d_ustat (d_ustat.U):
1671 This variable conditionally defines HAS_USTAT if ustat() is
1672 available to query file system statistics by dev_t.
1674 d_vendorarch (vendorarch.U):
1675 This variable conditionally defined PERL_VENDORARCH.
1677 d_vendorbin (vendorbin.U):
1678 This variable conditionally defines PERL_VENDORBIN.
1680 d_vendorlib (vendorlib.U):
1681 This variable conditionally defines PERL_VENDORLIB.
1683 d_vfork (d_vfork.U):
1684 This variable conditionally defines the HAS_VFORK symbol, which
1685 indicates the vfork() routine is available.
1687 d_void_closedir (d_closedir.U):
1688 This variable conditionally defines VOID_CLOSEDIR if closedir()
1689 does not return a value.
1691 d_voidsig (d_voidsig.U):
1692 This variable conditionally defines VOIDSIG if this system
1693 declares "void (*signal(...))()" in signal.h. The old way was to
1694 declare it as "int (*signal(...))()".
1696 d_voidtty (i_sysioctl.U):
1697 This variable conditionally defines USE_IOCNOTTY to indicate that the
1698 ioctl() call with TIOCNOTTY should be used to void tty association.
1699 Otherwise (on USG probably), it is enough to close the standard file
1700 decriptors and do a setpgrp().
1702 d_volatile (d_volatile.U):
1703 This variable conditionally defines the HASVOLATILE symbol, which
1704 indicates to the C program that this C compiler knows about the
1705 volatile declaration.
1707 d_vprintf (d_vprintf.U):
1708 This variable conditionally defines the HAS_VPRINTF symbol, which
1709 indicates to the C program that the vprintf() routine is available
1710 to printf with a pointer to an argument list.
1712 d_wait4 (d_wait4.U):
1713 This variable conditionally defines the HAS_WAIT4 symbol, which
1714 indicates the wait4() routine is available.
1716 d_waitpid (d_waitpid.U):
1717 This variable conditionally defines HAS_WAITPID if waitpid() is
1718 available to wait for child process.
1720 d_wcstombs (d_wcstombs.U):
1721 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1722 indicates to the C program that the wcstombs() routine is available
1723 to convert wide character strings to multibyte strings.
1725 d_wctomb (d_wctomb.U):
1726 This variable conditionally defines the HAS_WCTOMB symbol, which
1727 indicates to the C program that the wctomb() routine is available
1728 to convert a wide character to a multibyte.
1731 This variable conditionally defines the symbol XENIX, which alerts
1732 the C program that it runs under Xenix.
1735 This variable is used internally by Configure to determine the
1736 full pathname (if any) of the date program. After Configure runs,
1737 the value is reset to a plain "date" and is not useful.
1739 db_hashtype (i_db.U):
1740 This variable contains the type of the hash structure element
1741 in the <db.h> header file. In older versions of DB, it was
1742 int, while in newer ones it is u_int32_t.
1744 db_prefixtype (i_db.U):
1745 This variable contains the type of the prefix structure element
1746 in the <db.h> header file. In older versions of DB, it was
1747 int, while in newer ones it is size_t.
1749 defvoidused (voidflags.U):
1750 This variable contains the default value of the VOIDUSED symbol (15).
1752 direntrytype (i_dirent.U):
1753 This symbol is set to 'struct direct' or 'struct dirent' depending on
1754 whether dirent is available or not. You should use this pseudo type to
1755 portably declare your directory entries.
1758 This variable contains the extension that is to be used for the
1759 dynamically loaded modules that perl generaties.
1762 This variable contains the name of the dynamic loading file that
1763 will be used with the package.
1765 doublesize (doublesize.U):
1766 This variable contains the value of the DOUBLESIZE symbol, which
1767 indicates to the C program how many bytes there are in a double.
1769 drand01 (randfunc.U):
1770 Indicates the macro to be used to generate normalized
1771 random numbers. Uses randfunc, often divided by
1772 (double) (((unsigned long) 1 << randbits)) in order to
1773 normalize the result.
1774 In C programs, the macro 'Drand01' is mapped to drand01.
1776 dynamic_ext (Extensions.U):
1777 This variable holds a list of XS extension files we want to
1778 link dynamically into the package. It is used by Makefile.
1780 eagain (nblock_io.U):
1781 This variable bears the symbolic errno code set by read() when no
1782 data is present on the file and non-blocking I/O was enabled (otherwise,
1783 read() blocks naturally).
1786 This variable conditionally defines EBCDIC if this
1787 system uses EBCDIC encoding. Among other things, this
1788 means that the character ranges are not contiguous.
1792 This variable is used internally by Configure to determine the
1793 full pathname (if any) of the echo program. After Configure runs,
1794 the value is reset to a plain "echo" and is not useful.
1797 This variable is used internally by Configure to determine the
1798 full pathname (if any) of the egrep program. After Configure runs,
1799 the value is reset to a plain "egrep" and is not useful.
1802 This variable is defined but not used by Configure.
1803 The value is a plain '' and is not useful.
1806 When running under Eunice this variable contains a command which will
1807 convert a shell script to the proper form of text file for it to be
1808 executable by the shell. On other systems it is a no-op.
1811 This is an old synonym for _exe.
1814 This variable is used internally by Configure to determine the
1815 full pathname (if any) of the expr program. After Configure runs,
1816 the value is reset to a plain "expr" and is not useful.
1818 extensions (Extensions.U):
1819 This variable holds a list of all extension files (both XS and
1820 non-xs linked into the package. It is propagated to Config.pm
1821 and is typically used to test whether a particular extesion
1824 fflushall (fflushall.U):
1825 This symbol, if defined, tells that to flush
1826 all pending stdio output one must loop through all
1827 the stdio file handles stored in an array and fflush them.
1828 Note that if fflushNULL is defined, fflushall will not
1829 even be probed for and will be left undefined.
1831 fflushNULL (fflushall.U):
1832 This symbol, if defined, tells that fflush(NULL) does flush
1833 all pending stdio output.
1836 This variable is defined but not used by Configure.
1837 The value is a plain '' and is not useful.
1839 firstmakefile (Unix.U):
1840 This variable defines the first file searched by make. On unix,
1841 it is makefile (then Makefile). On case-insensitive systems,
1842 it might be something else. This is only used to deal with
1843 convoluted make depend tricks.
1846 This variable is defined but not used by Configure.
1847 The value is a plain '' and is not useful.
1849 fpossize (fpossize.U):
1850 This variable contains the size of a fpostype in bytes.
1852 fpostype (fpostype.U):
1853 This variable defines Fpos_t to be something like fpos_t, long,
1854 uint, or whatever type is used to declare file positions in libc.
1856 freetype (mallocsrc.U):
1857 This variable contains the return type of free(). It is usually
1858 void, but occasionally int.
1861 This variable contains the full pathname to 'ar', whether or
1862 not the user has specified 'portability'. This is only used
1866 This variable contains the full pathname to 'csh', whether or
1867 not the user has specified 'portability'. This is only used
1868 in the compiled C program, and we assume that all systems which
1869 can share this executable will have the same full pathname to
1872 full_sed (Loc_sed.U):
1873 This variable contains the full pathname to 'sed', whether or
1874 not the user has specified 'portability'. This is only used
1875 in the compiled C program, and we assume that all systems which
1876 can share this executable will have the same full pathname to
1879 gccosandvers (gccvers.U):
1880 If GNU cc (gcc) is used, this variable the operating system and
1881 version used to compile the gcc. It is set to '' if not gcc,
1882 or if nothing useful can be parsed as the os version.
1884 gccversion (gccvers.U):
1885 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1886 indicate whether the compiler is version 1 or 2. This is used in
1887 setting some of the default cflags. It is set to '' if not gcc.
1890 This variable contains the format string used for printing a Gid_t.
1892 gidsign (gidsign.U):
1893 This variable contains the signedness of a gidtype.
1894 1 for unsigned, -1 for signed.
1896 gidsize (gidsize.U):
1897 This variable contains the size of a gidtype in bytes.
1899 gidtype (gidtype.U):
1900 This variable defines Gid_t to be something like gid_t, int,
1901 ushort, or whatever type is used to declare the return type
1902 of getgid(). Typically, it is the type of group ids in the kernel.
1905 This variable holds the general path (space-separated) used to
1906 find libraries. It may contain directories that do not exist on
1907 this platform, libpth is the cleaned-up version.
1910 This variable is used internally by Configure to determine the
1911 full pathname (if any) of the grep program. After Configure runs,
1912 the value is reset to a plain "grep" and is not useful.
1915 This variable contains a command that produces the text of the
1916 /etc/group file. This is normally "cat /etc/group", but can be
1917 "ypcat group" when NIS is used.
1918 On some systems, such as os390, there may be no equivalent
1919 command, in which case this variable is unset.
1921 groupstype (groupstype.U):
1922 This variable defines Groups_t to be something like gid_t, int,
1923 ushort, or whatever type is used for the second argument to
1924 getgroups() and setgroups(). Usually, this is the same as
1925 gidtype (gid_t), but sometimes it isn't.
1928 This variable is used internally by Configure to determine the
1929 full pathname (if any) of the gzip program. After Configure runs,
1930 the value is reset to a plain "gzip" and is not useful.
1932 h_fcntl (h_fcntl.U):
1933 This is variable gets set in various places to tell i_fcntl that
1934 <fcntl.h> should be included.
1936 h_sysfile (h_sysfile.U):
1937 This is variable gets set in various places to tell i_sys_file that
1938 <sys/file.h> should be included.
1941 Gives the type of hints used for previous answers. May be one of
1942 "default", "recommended" or "previous".
1945 This variable contains a command that produces the text of the
1946 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1947 "ypcat hosts" when NIS is used.
1948 On some systems, such as os390, there may be no equivalent
1949 command, in which case this variable is unset.
1952 This variable is the size of an I16 in bytes.
1955 This variable contains the C type used for Perl's I16.
1958 This variable is the size of an I32 in bytes.
1961 This variable contains the C type used for Perl's I32.
1964 This variable is the size of an I64 in bytes.
1967 This variable contains the C type used for Perl's I64.
1970 This variable is the size of an I8 in bytes.
1973 This variable contains the C type used for Perl's I8.
1975 i_arpainet (i_arpainet.U):
1976 This variable conditionally defines the I_ARPA_INET symbol,
1977 and indicates whether a C program should include <arpa/inet.h>.
1979 i_bsdioctl (i_sysioctl.U):
1980 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1981 indicates to the C program that <sys/bsdioctl.h> exists and should
1985 This variable conditionally defines the I_DB symbol, and indicates
1986 whether a C program may include Berkeley's DB include file <db.h>.
1989 This variable conditionally defines the I_DBM symbol, which
1990 indicates to the C program that <dbm.h> exists and should
1993 i_dirent (i_dirent.U):
1994 This variable conditionally defines I_DIRENT, which indicates
1995 to the C program that it should include <dirent.h>.
1998 This variable conditionally defines the I_DLD symbol, which
1999 indicates to the C program that <dld.h> (GNU dynamic loading)
2000 exists and should be included.
2002 i_dlfcn (i_dlfcn.U):
2003 This variable conditionally defines the I_DLFCN symbol, which
2004 indicates to the C program that <dlfcn.h> exists and should
2007 i_fcntl (i_fcntl.U):
2008 This variable controls the value of I_FCNTL (which tells
2009 the C program to include <fcntl.h>).
2011 i_float (i_float.U):
2012 This variable conditionally defines the I_FLOAT symbol, and indicates
2013 whether a C program may include <float.h> to get symbols like DBL_MAX
2014 or DBL_MIN, i.e. machine dependent floating point values.
2017 This variable conditionally defines the I_GDBM symbol, which
2018 indicates to the C program that <gdbm.h> exists and should
2022 This variable conditionally defines the I_GRP symbol, and indicates
2023 whether a C program should include <grp.h>.
2025 i_iconv (i_iconv.U):
2026 This variable conditionally defines the I_ICONV symbol, and indicates
2027 whether a C program should include <iconv.h>.
2029 i_ieeefp (i_ieeefp.U):
2030 This variable conditionally defines the I_IEEEFP symbol, and indicates
2031 whether a C program should include <ieeefp.h>.
2033 i_inttypes (i_inttypes.U):
2034 This variable conditionally defines the I_INTTYPES symbol,
2035 and indicates whether a C program should include <inttypes.h>.
2037 i_libutil (i_libutil.U):
2038 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2039 whether a C program should include <libutil.h>.
2041 i_limits (i_limits.U):
2042 This variable conditionally defines the I_LIMITS symbol, and indicates
2043 whether a C program may include <limits.h> to get symbols like WORD_BIT
2046 i_locale (i_locale.U):
2047 This variable conditionally defines the I_LOCALE symbol,
2048 and indicates whether a C program should include <locale.h>.
2050 i_machcthr (i_machcthr.U):
2051 This variable conditionally defines the I_MACH_CTHREADS symbol,
2052 and indicates whether a C program should include <mach/cthreads.h>.
2054 i_malloc (i_malloc.U):
2055 This variable conditionally defines the I_MALLOC symbol, and indicates
2056 whether a C program should include <malloc.h>.
2059 This variable conditionally defines the I_MATH symbol, and indicates
2060 whether a C program may include <math.h>.
2062 i_memory (i_memory.U):
2063 This variable conditionally defines the I_MEMORY symbol, and indicates
2064 whether a C program should include <memory.h>.
2066 i_mntent (i_mntent.U):
2067 This variable conditionally defines the I_MNTENT symbol, and indicates
2068 whether a C program should include <mntent.h>.
2071 This variable conditionally defines the I_NDBM symbol, which
2072 indicates to the C program that <ndbm.h> exists and should
2075 i_netdb (i_netdb.U):
2076 This variable conditionally defines the I_NETDB symbol, and indicates
2077 whether a C program should include <netdb.h>.
2079 i_neterrno (i_neterrno.U):
2080 This variable conditionally defines the I_NET_ERRNO symbol, which
2081 indicates to the C program that <net/errno.h> exists and should
2084 i_netinettcp (i_netinettcp.U):
2085 This variable conditionally defines the I_NETINET_TCP symbol,
2086 and indicates whether a C program should include <netinet/tcp.h>.
2089 This variable conditionally defines I_NETINET_IN, which indicates
2090 to the C program that it should include <netinet/in.h>. Otherwise,
2091 you may try <sys/in.h>.
2094 This variable conditionally defines the I_POLL symbol, and indicates
2095 whether a C program should include <poll.h>.
2098 This variable conditionally defines the I_PROT symbol, and indicates
2099 whether a C program should include <prot.h>.
2101 i_pthread (i_pthread.U):
2102 This variable conditionally defines the I_PTHREAD symbol,
2103 and indicates whether a C program should include <pthread.h>.
2106 This variable conditionally defines I_PWD, which indicates
2107 to the C program that it should include <pwd.h>.
2109 i_rpcsvcdbm (i_dbm.U):
2110 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2111 indicates to the C program that <rpcsvc/dbm.h> exists and should
2112 be included. Some System V systems might need this instead of <dbm.h>.
2115 This variable conditionally defines the I_SFIO symbol,
2116 and indicates whether a C program should include <sfio.h>.
2118 i_sgtty (i_termio.U):
2119 This variable conditionally defines the I_SGTTY symbol, which
2120 indicates to the C program that it should include <sgtty.h> rather
2123 i_shadow (i_shadow.U):
2124 This variable conditionally defines the I_SHADOW symbol, and indicates
2125 whether a C program should include <shadow.h>.
2127 i_socks (i_socks.U):
2128 This variable conditionally defines the I_SOCKS symbol, and indicates
2129 whether a C program should include <socks.h>.
2131 i_stdarg (i_varhdr.U):
2132 This variable conditionally defines the I_STDARG symbol, which
2133 indicates to the C program that <stdarg.h> exists and should
2136 i_stddef (i_stddef.U):
2137 This variable conditionally defines the I_STDDEF symbol, which
2138 indicates to the C program that <stddef.h> exists and should
2141 i_stdlib (i_stdlib.U):
2142 This variable conditionally defines the I_STDLIB symbol, which
2143 indicates to the C program that <stdlib.h> exists and should
2146 i_string (i_string.U):
2147 This variable conditionally defines the I_STRING symbol, which
2148 indicates that <string.h> should be included rather than <strings.h>.
2150 i_sunmath (i_sunmath.U):
2151 This variable conditionally defines the I_SUNMATH symbol, and indicates
2152 whether a C program should include <sunmath.h>.
2154 i_sysaccess (i_sysaccess.U):
2155 This variable conditionally defines the I_SYS_ACCESS symbol,
2156 and indicates whether a C program should include <sys/access.h>.
2158 i_sysdir (i_sysdir.U):
2159 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2160 whether a C program should include <sys/dir.h>.
2162 i_sysfile (i_sysfile.U):
2163 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2164 whether a C program should include <sys/file.h> to get R_OK and friends.
2166 i_sysfilio (i_sysioctl.U):
2167 This variable conditionally defines the I_SYS_FILIO symbol, which
2168 indicates to the C program that <sys/filio.h> exists and should
2169 be included in preference to <sys/ioctl.h>.
2172 This variable conditionally defines I_SYS_IN, which indicates
2173 to the C program that it should include <sys/in.h> instead of
2176 i_sysioctl (i_sysioctl.U):
2177 This variable conditionally defines the I_SYS_IOCTL symbol, which
2178 indicates to the C program that <sys/ioctl.h> exists and should
2181 i_syslog (i_syslog.U):
2182 This variable conditionally defines the I_SYSLOG symbol,
2183 and indicates whether a C program should include <syslog.h>.
2185 i_sysmman (i_sysmman.U):
2186 This variable conditionally defines the I_SYS_MMAN symbol, and
2187 indicates whether a C program should include <sys/mman.h>.
2189 i_sysmode (i_sysmode.U):
2190 This variable conditionally defines the I_SYSMODE symbol,
2191 and indicates whether a C program should include <sys/mode.h>.
2193 i_sysmount (i_sysmount.U):
2194 This variable conditionally defines the I_SYSMOUNT symbol,
2195 and indicates whether a C program should include <sys/mount.h>.
2197 i_sysndir (i_sysndir.U):
2198 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2199 whether a C program should include <sys/ndir.h>.
2201 i_sysparam (i_sysparam.U):
2202 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2203 whether a C program should include <sys/param.h>.
2205 i_sysresrc (i_sysresrc.U):
2206 This variable conditionally defines the I_SYS_RESOURCE symbol,
2207 and indicates whether a C program should include <sys/resource.h>.
2209 i_syssecrt (i_syssecrt.U):
2210 This variable conditionally defines the I_SYS_SECURITY symbol,
2211 and indicates whether a C program should include <sys/security.h>.
2213 i_sysselct (i_sysselct.U):
2214 This variable conditionally defines I_SYS_SELECT, which indicates
2215 to the C program that it should include <sys/select.h> in order to
2216 get the definition of struct timeval.
2218 i_syssockio (i_sysioctl.U):
2219 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2220 C program that socket ioctl codes may be found in <sys/sockio.h>
2221 instead of <sys/ioctl.h>.
2223 i_sysstat (i_sysstat.U):
2224 This variable conditionally defines the I_SYS_STAT symbol,
2225 and indicates whether a C program should include <sys/stat.h>.
2227 i_sysstatfs (i_sysstatfs.U):
2228 This variable conditionally defines the I_SYSSTATFS symbol,
2229 and indicates whether a C program should include <sys/statfs.h>.
2231 i_sysstatvfs (i_sysstatvfs.U):
2232 This variable conditionally defines the I_SYSSTATVFS symbol,
2233 and indicates whether a C program should include <sys/statvfs.h>.
2235 i_systime (i_time.U):
2236 This variable conditionally defines I_SYS_TIME, which indicates
2237 to the C program that it should include <sys/time.h>.
2239 i_systimek (i_time.U):
2240 This variable conditionally defines I_SYS_TIME_KERNEL, which
2241 indicates to the C program that it should include <sys/time.h>
2242 with KERNEL defined.
2244 i_systimes (i_systimes.U):
2245 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2246 whether a C program should include <sys/times.h>.
2248 i_systypes (i_systypes.U):
2249 This variable conditionally defines the I_SYS_TYPES symbol,
2250 and indicates whether a C program should include <sys/types.h>.
2252 i_sysuio (i_sysuio.U):
2253 This variable conditionally defines the I_SYSUIO symbol, and indicates
2254 whether a C program should include <sys/uio.h>.
2256 i_sysun (i_sysun.U):
2257 This variable conditionally defines I_SYS_UN, which indicates
2258 to the C program that it should include <sys/un.h> to get UNIX
2259 domain socket definitions.
2261 i_sysutsname (i_sysutsname.U):
2262 This variable conditionally defines the I_SYSUTSNAME symbol,
2263 and indicates whether a C program should include <sys/utsname.h>.
2265 i_sysvfs (i_sysvfs.U):
2266 This variable conditionally defines the I_SYSVFS symbol,
2267 and indicates whether a C program should include <sys/vfs.h>.
2269 i_syswait (i_syswait.U):
2270 This variable conditionally defines I_SYS_WAIT, which indicates
2271 to the C program that it should include <sys/wait.h>.
2273 i_termio (i_termio.U):
2274 This variable conditionally defines the I_TERMIO symbol, which
2275 indicates to the C program that it should include <termio.h> rather
2278 i_termios (i_termio.U):
2279 This variable conditionally defines the I_TERMIOS symbol, which
2280 indicates to the C program that the POSIX <termios.h> file is
2284 This variable conditionally defines I_TIME, which indicates
2285 to the C program that it should include <time.h>.
2287 i_unistd (i_unistd.U):
2288 This variable conditionally defines the I_UNISTD symbol, and indicates
2289 whether a C program should include <unistd.h>.
2291 i_ustat (i_ustat.U):
2292 This variable conditionally defines the I_USTAT symbol, and indicates
2293 whether a C program should include <ustat.h>.
2295 i_utime (i_utime.U):
2296 This variable conditionally defines the I_UTIME symbol, and indicates
2297 whether a C program should include <utime.h>.
2299 i_values (i_values.U):
2300 This variable conditionally defines the I_VALUES symbol, and indicates
2301 whether a C program may include <values.h> to get symbols like MAXLONG
2304 i_varargs (i_varhdr.U):
2305 This variable conditionally defines I_VARARGS, which indicates
2306 to the C program that it should include <varargs.h>.
2308 i_varhdr (i_varhdr.U):
2309 Contains the name of the header to be included to get va_dcl definition.
2310 Typically one of varargs.h or stdarg.h.
2312 i_vfork (i_vfork.U):
2313 This variable conditionally defines the I_VFORK symbol, and indicates
2314 whether a C program should include vfork.h.
2316 ignore_versioned_solibs (libs.U):
2317 This variable should be non-empty if non-versioned shared
2318 libraries (libfoo.so.x.y) are to be ignored (because they
2319 cannot be linked against).
2321 inc_version_list (inc_version_list.U):
2322 This variable specifies the list of subdirectories in over
2323 which perl.c:incpush() and lib/lib.pm will automatically
2324 search when adding directories to @INC. The elements in
2325 the list are separated by spaces. This is only useful
2326 if you have a perl library directory tree structured like the
2327 default one. See INSTALL for how this works. The versioned
2328 site_perl directory was introduced in 5.005, so that is the
2329 lowest possible value.
2331 inc_version_list_init (inc_version_list.U):
2332 This variable holds the same list as inc_version_list, but
2333 each item is enclosed in double quotes and separated by commas,
2334 suitable for use in the PERL_INC_VERSION_LIST initialization.
2337 This variable must preceed the normal include path to get hte
2338 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2339 Value can be "" or "/bsd43" on mips.
2342 This variable is defined but not used by Configure.
2343 The value is a plain '' and is not useful.
2345 installarchlib (archlib.U):
2346 This variable is really the same as archlibexp but may differ on
2347 those systems using AFS. For extra portability, only this variable
2348 should be used in makefiles.
2351 This variable is the same as binexp unless AFS is running in which case
2352 the user is explicitely prompted for it. This variable should always
2353 be used in your makefiles for maximum portability.
2355 installman1dir (man1dir.U):
2356 This variable is really the same as man1direxp, unless you are using
2357 AFS in which case it points to the read/write location whereas
2358 man1direxp only points to the read-only access location. For extra
2359 portability, you should only use this variable within your makefiles.
2361 installman3dir (man3dir.U):
2362 This variable is really the same as man3direxp, unless you are using
2363 AFS in which case it points to the read/write location whereas
2364 man3direxp only points to the read-only access location. For extra
2365 portability, you should only use this variable within your makefiles.
2367 installprefix (installprefix.U):
2368 This variable holds the name of the directory below which
2369 "make install" will install the package. For most users, this
2370 is the same as prefix. However, it is useful for
2371 installing the software into a different (usually temporary)
2372 location after which it can be bundled up and moved somehow
2373 to the final location specified by prefix.
2375 installprefixexp (installprefix.U):
2376 This variable holds the full absolute path of installprefix
2377 with all ~-expansion done.
2379 installprivlib (privlib.U):
2380 This variable is really the same as privlibexp but may differ on
2381 those systems using AFS. For extra portability, only this variable
2382 should be used in makefiles.
2384 installscript (scriptdir.U):
2385 This variable is usually the same as scriptdirexp, unless you are on
2386 a system running AFS, in which case they may differ slightly. You
2387 should always use this variable within your makefiles for portability.
2389 installsitearch (sitearch.U):
2390 This variable is really the same as sitearchexp but may differ on
2391 those systems using AFS. For extra portability, only this variable
2392 should be used in makefiles.
2394 installsitebin (sitebin.U):
2395 This variable is usually the same as sitebinexp, unless you are on
2396 a system running AFS, in which case they may differ slightly. You
2397 should always use this variable within your makefiles for portability.
2399 installsitelib (sitelib.U):
2400 This variable is really the same as sitelibexp but may differ on
2401 those systems using AFS. For extra portability, only this variable
2402 should be used in makefiles.
2404 installstyle (installstyle.U):
2405 This variable describes the "style" of the perl installation.
2406 This is intended to be useful for tools that need to
2407 manipulate entire perl distributions. Perl itself doesn't use
2408 this to find its libraries -- the library directories are
2409 stored directly in Config.pm. Currently, there are only two
2410 styles: "lib" and "lib/perl5". The default library locations
2411 (e.g. privlib, sitelib) are either $prefix/lib or
2412 $prefix/lib/perl5. The former is useful if $prefix is a
2413 directory dedicated to perl (e.g. /opt/perl), while the latter
2414 is useful if $prefix is shared by many packages, e.g. if
2416 This may later be extended to include other information, so
2417 be careful with pattern-matching on the results.
2418 For compatibility with perl5.005 and earlier, the default
2419 setting is based on whether or not $prefix contains the string
2422 installusrbinperl (instubperl.U):
2423 This variable tells whether Perl should be installed also as
2424 /usr/bin/perl in addition to
2427 installvendorarch (vendorarch.U):
2428 This variable is really the same as vendorarchexp but may differ on
2429 those systems using AFS. For extra portability, only this variable
2430 should be used in makefiles.
2432 installvendorbin (vendorbin.U):
2433 This variable is really the same as vendorbinexp but may differ on
2434 those systems using AFS. For extra portability, only this variable
2435 should be used in makefiles.
2437 installvendorlib (vendorlib.U):
2438 This variable is really the same as vendorlibexp but may differ on
2439 those systems using AFS. For extra portability, only this variable
2440 should be used in makefiles.
2442 intsize (intsize.U):
2443 This variable contains the value of the INTSIZE symbol, which
2444 indicates to the C program how many bytes there are in an int.
2446 ivdformat (perlxvf.U):
2447 This variable contains the format string used for printing
2448 a Perl IV as a signed decimal integer.
2451 This variable is the size of an IV in bytes.
2454 This variable contains the C type used for Perl's IV.
2456 known_extensions (Extensions.U):
2457 This variable holds a list of all XS extensions included in
2461 This variable is defined but not used by Configure.
2462 The value is a plain '' and is not useful.
2465 This variable indicates the program to be used to link
2466 libraries for dynamic loading. On some systems, it is 'ld'.
2467 On ELF systems, it should be $cc. Mostly, we'll try to respect
2468 the hint file setting.
2470 lddlflags (dlsrc.U):
2471 This variable contains any special flags that might need to be
2472 passed to $ld to create a shared library suitable for dynamic
2473 loading. It is up to the makefile to use it. For hpux, it
2474 should be '-b'. For sunos 4.1, it is empty.
2476 ldflags (ccflags.U):
2477 This variable contains any additional C loader flags desired by
2478 the user. It is up to the Makefile to use this.
2480 ldflags_uselargefiles (uselfs.U):
2481 This variable contains the loader flags needed by large file builds
2482 and added to ldflags by hints files.
2484 ldlibpthname (libperl.U):
2485 This variable holds the name of the shared library
2486 search path, often LD_LIBRARY_PATH. To get an empty
2487 string, the hints file must set this to 'none'.
2490 This variable is used internally by Configure to determine the
2491 full pathname (if any) of the less program. After Configure runs,
2492 the value is reset to a plain "less" and is not useful.
2495 This is an old synonym for _a.
2498 This variable contains the location of the C library.
2500 libperl (libperl.U):
2501 The perl executable is obtained by linking perlmain.c with
2502 libperl, any static extensions (usually just DynaLoader),
2503 and any other libraries needed on this system. libperl
2504 is usually libperl.a, but can also be libperl.so.xxx if
2505 the user wishes to build a perl executable with a shared
2509 This variable holds the general path (space-separated) used to find
2510 libraries. It is intended to be used by other units.
2513 This variable holds the additional libraries we want to use.
2514 It is up to the Makefile to deal with it.
2517 This variable holds the directory names aka dirnames of the libraries
2518 we found and accepted, duplicates are removed.
2521 This variable holds the filenames aka basenames of the libraries
2522 we found and accepted.
2525 This variable holds the full pathnames of the libraries
2526 we found and accepted.
2529 This variable holds the directory names probed for libraries.
2531 libswanted (Myinit.U):
2532 This variable holds a list of all the libraries we want to
2533 search. The order is chosen to pick up the c library
2534 ahead of ucb or bsd libraries for SVR4.
2536 libswanted_uselargefiles (uselfs.U):
2537 This variable contains the libraries needed by large file builds
2538 and added to ldflags by hints files. It is a space separated list
2539 of the library names without the "lib" prefix or any suffix, just
2543 This variable is defined but not used by Configure.
2544 The value is a plain '' and is not useful.
2547 This variable is defined but not used by Configure.
2548 The value is a plain '' and is not useful.
2550 lkflags (ccflags.U):
2551 This variable contains any additional C partial linker flags desired by
2552 the user. It is up to the Makefile to use this.
2555 This variable is used internally by Configure to determine the
2556 full pathname (if any) of the ln program. After Configure runs,
2557 the value is reset to a plain "ln" and is not useful.
2560 This variable holds the name of the command to make
2561 symbolic links (if they are supported). It can be used
2562 in the Makefile. It is either 'ln -s' or 'ln'
2564 locincpth (ccflags.U):
2565 This variable contains a list of additional directories to be
2566 searched by the compiler. The appropriate '-I' directives will
2567 be added to ccflags. This is intended to simplify setting
2568 local directories from the Configure command line.
2569 It's not much, but it parallels the loclibpth stuff in libpth.U.
2571 loclibpth (libpth.U):
2572 This variable holds the paths (space-separated) used to find local
2573 libraries. It is prepended to libpth, and is intended to be easily
2574 set from the command line.
2576 longdblsize (d_longdbl.U):
2577 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2578 indicates to the C program how many bytes there are in a long double,
2579 if this system supports long doubles.
2581 longlongsize (d_longlong.U):
2582 This variable contains the value of the LONGLONGSIZE symbol, which
2583 indicates to the C program how many bytes there are in a long long,
2584 if this system supports long long.
2586 longsize (intsize.U):
2587 This variable contains the value of the LONGSIZE symbol, which
2588 indicates to the C program how many bytes there are in a long.
2591 This variable is defined but not used by Configure.
2592 The value is a plain '' and is not useful.
2595 This variable is defined but not used by Configure.
2596 The value is a plain '' and is not useful.
2599 This variable is used internally by Configure to determine the
2600 full pathname (if any) of the ls program. After Configure runs,
2601 the value is reset to a plain "ls" and is not useful.
2603 lseeksize (lseektype.U):
2604 This variable defines lseektype to be something like off_t, long,
2605 or whatever type is used to declare lseek offset's type in the
2606 kernel (which also appears to be lseek's return type).
2608 lseektype (lseektype.U):
2609 This variable defines lseektype to be something like off_t, long,
2610 or whatever type is used to declare lseek offset's type in the
2611 kernel (which also appears to be lseek's return type).
2614 This variable is defined but not used by Configure.
2615 The value is a plain '' and is not useful.
2618 This variable is defined but not used by Configure.
2619 The value is a plain '' and is not useful.
2622 This variable is used internally by Configure to determine the
2623 full pathname (if any) of the make program. After Configure runs,
2624 the value is reset to a plain "make" and is not useful.
2626 make_set_make (make.U):
2627 Some versions of 'make' set the variable MAKE. Others do not.
2628 This variable contains the string to be included in Makefile.SH
2629 so that MAKE is set if needed, and not if not needed.
2630 Possible values are:
2631 make_set_make='#' # If your make program handles this for you,
2632 make_set_make="MAKE=$make" # if it doesn't.
2633 I used a comment character so that we can distinguish a
2634 'set' value (from a previous config.sh or Configure '-D' option)
2635 from an uncomputed value.
2637 mallocobj (mallocsrc.U):
2638 This variable contains the name of the malloc.o that this package
2639 generates, if that malloc.o is preferred over the system malloc.
2640 Otherwise the value is null. This variable is intended for generating
2641 Makefiles. See mallocsrc.
2643 mallocsrc (mallocsrc.U):
2644 This variable contains the name of the malloc.c that comes with
2645 the package, if that malloc.c is preferred over the system malloc.
2646 Otherwise the value is null. This variable is intended for generating
2649 malloctype (mallocsrc.U):
2650 This variable contains the kind of ptr returned by malloc and realloc.
2652 man1dir (man1dir.U):
2653 This variable contains the name of the directory in which manual
2654 source pages are to be put. It is the responsibility of the
2655 Makefile.SH to get the value of this into the proper command.
2656 You must be prepared to do the ~name expansion yourself.
2658 man1direxp (man1dir.U):
2659 This variable is the same as the man1dir variable, but is filename
2660 expanded at configuration time, for convenient use in makefiles.
2662 man1ext (man1dir.U):
2663 This variable contains the extension that the manual page should
2664 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2667 man3dir (man3dir.U):
2668 This variable contains the name of the directory in which manual
2669 source pages are to be put. It is the responsibility of the
2670 Makefile.SH to get the value of this into the proper command.
2671 You must be prepared to do the ~name expansion yourself.
2673 man3direxp (man3dir.U):
2674 This variable is the same as the man3dir variable, but is filename
2675 expanded at configuration time, for convenient use in makefiles.
2677 man3ext (man3dir.U):
2678 This variable contains the extension that the manual page should
2679 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2683 This variable is used internally by Configure to determine the
2684 full pathname (if any) of the Mcc program. After Configure runs,
2685 the value is reset to a plain "Mcc" and is not useful.
2687 mips_type (usrinc.U):
2688 This variable holds the environment type for the mips system.
2689 Possible values are "BSD 4.3" and "System V".
2692 This variable is used internally by Configure to determine the
2693 full pathname (if any) of the mkdir program. After Configure runs,
2694 the value is reset to a plain "mkdir" and is not useful.
2696 mmaptype (d_mmap.U):
2697 This symbol contains the type of pointer returned by mmap()
2698 (and simultaneously the type of the first argument).
2699 It can be 'void *' or 'caddr_t'.
2701 modetype (modetype.U):
2702 This variable defines modetype to be something like mode_t,
2703 int, unsigned short, or whatever type is used to declare file
2704 modes for system calls.
2707 This variable is used internally by Configure to determine the
2708 full pathname (if any) of the more program. After Configure runs,
2709 the value is reset to a plain "more" and is not useful.
2711 multiarch (multiarch.U):
2712 This variable conditionally defines the MULTIARCH symbol
2713 which signifies the presence of multiplatform files.
2714 This is normally set by hints files.
2717 This variable is defined but not used by Configure.
2718 The value is a plain '' and is not useful.
2720 myarchname (archname.U):
2721 This variable holds the architecture name computed by Configure in
2722 a previous run. It is not intended to be perused by any user and
2723 should never be set in a hint file.
2725 mydomain (myhostname.U):
2726 This variable contains the eventual value of the MYDOMAIN symbol,
2727 which is the domain of the host the program is going to run on.
2728 The domain must be appended to myhostname to form a complete host name.
2729 The dot comes with mydomain, and need not be supplied by the program.
2731 myhostname (myhostname.U):
2732 This variable contains the eventual value of the MYHOSTNAME symbol,
2733 which is the name of the host the program is going to run on.
2734 The domain is not kept with hostname, but must be gotten from mydomain.
2735 The dot comes with mydomain, and need not be supplied by the program.
2737 myuname (Oldconfig.U):
2738 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2739 pseudo variables assignments in the output are stripped, thank you. The
2740 whole thing is then lower-cased.
2743 This variable contains the '-n' flag if that is what causes the echo
2744 command to suppress newline. Otherwise it is null. Correct usage is
2745 $echo $n "prompt for a question: $c".
2747 need_va_copy (need_va_copy.U):
2748 This symbol, if defined, indicates that the system stores
2749 the variable argument list datatype, va_list, in a format
2750 that cannot be copied by simple assignment, so that some
2751 other means must be used when copying is required.
2752 As such systems vary in their provision (or non-provision)
2753 of copying mechanisms, handy.h defines a platform-
2754 independent macro, Perl_va_copy(src, dst), to do the job.
2756 netdb_hlen_type (netdbtype.U):
2757 This variable holds the type used for the 2nd argument to
2758 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2759 This is only useful if you have gethostbyaddr(), naturally.
2761 netdb_host_type (netdbtype.U):
2762 This variable holds the type used for the 1st argument to
2763 gethostbyaddr(). Usually, this is char * or void *, possibly
2764 with or without a const prefix.
2765 This is only useful if you have gethostbyaddr(), naturally.
2767 netdb_name_type (netdbtype.U):
2768 This variable holds the type used for the argument to
2769 gethostbyname(). Usually, this is char * or const char *.
2770 This is only useful if you have gethostbyname(), naturally.
2772 netdb_net_type (netdbtype.U):
2773 This variable holds the type used for the 1st argument to
2774 getnetbyaddr(). Usually, this is int or long.
2775 This is only useful if you have getnetbyaddr(), naturally.
2778 This variable is used internally by Configure to determine the
2779 full pathname (if any) of the nm program. After Configure runs,
2780 the value is reset to a plain "nm" and is not useful.
2783 This variable holds the options that may be necessary for nm.
2785 nm_so_opt (usenm.U):
2786 This variable holds the options that may be necessary for nm
2787 to work on a shared library but that can not be used on an
2788 archive library. Currently, this is only used by Linux, where
2789 nm --dynamic is *required* to get symbols from an ELF library which
2790 has been stripped, but nm --dynamic is *fatal* on an archive library.
2791 Maybe Linux should just always set usenm=false.
2793 nonxs_ext (Extensions.U):
2794 This variable holds a list of all non-xs extensions included
2795 in the package. All of them will be built.
2798 This variable is used internally by Configure to determine the
2799 full pathname (if any) of the nroff program. After Configure runs,
2800 the value is reset to a plain "nroff" and is not useful.
2802 nveformat (perlxvf.U):
2803 This variable contains the format string used for printing
2804 a Perl NV using %e-ish floating point format.
2806 nvEUformat (perlxvf.U):
2807 This variable contains the format string used for printing
2808 a Perl NV using %E-ish floating point format.
2810 nvfformat (perlxvf.U):
2811 This variable confains the format string used for printing
2812 a Perl NV using %f-ish floating point format.
2814 nvFUformat (perlxvf.U):
2815 This variable confains the format string used for printing
2816 a Perl NV using %F-ish floating point format.
2818 nvgformat (perlxvf.U):
2819 This variable contains the format string used for printing
2820 a Perl NV using %g-ish floating point format.
2822 nvGUformat (perlxvf.U):
2823 This variable contains the format string used for printing
2824 a Perl NV using %G-ish floating point format.
2827 This variable is the size of an NV in bytes.
2830 This variable contains the C type used for Perl's NV.
2832 o_nonblock (nblock_io.U):
2833 This variable bears the symbol value to be used during open() or fcntl()
2834 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2835 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2836 but that is only supported by some devices.
2839 This is an old synonym for _o.
2841 old_pthread_create_joinable (d_pthrattrj.U):
2842 This variable defines the constant to use for creating joinable
2843 (aka undetached) pthreads. Unused if pthread.h defines
2844 PTHREAD_CREATE_JOINABLE. If used, possible values are
2845 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2847 optimize (ccflags.U):
2848 This variable contains any optimizer/debugger flag that should be used.
2849 It is up to the Makefile to use it.
2851 orderlib (orderlib.U):
2852 This variable is "true" if the components of libraries must be ordered
2853 (with `lorder $* | tsort`) before placing them in an archive. Set to
2854 "false" if ranlib or ar can generate random libraries.
2856 osname (Oldconfig.U):
2857 This variable contains the operating system name (e.g. sunos,
2858 solaris, hpux, etc.). It can be useful later on for setting
2859 defaults. Any spaces are replaced with underscores. It is set
2860 to a null string if we can't figure it out.
2862 osvers (Oldconfig.U):
2863 This variable contains the operating system version (e.g.
2864 4.1.3, 5.2, etc.). It is primarily used for helping select
2865 an appropriate hints file, but might be useful elsewhere for
2866 setting defaults. It is set to '' if we can't figure it out.
2867 We try to be flexible about how much of the version number
2868 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2869 same for this package, hints files might just be os_4.0 or
2870 os_4.1, etc., not keeping separate files for each little release.
2872 otherlibdirs (otherlibdirs.U):
2873 This variable contains a colon-separated set of paths for the perl
2874 binary to search for additional library files or modules.
2875 These directories will be tacked to the end of @INC.
2876 Perl will automatically search below each path for version-
2877 and architecture-specific directories. See inc_version_list
2879 A value of ' ' means 'none' and is used to preserve this value
2880 for the next run through Configure.
2882 package (package.U):
2883 This variable contains the name of the package being constructed.
2884 It is primarily intended for the use of later Configure units.
2887 This variable contains the name of the preferred pager on the system.
2888 Usual values are (the full pathnames of) more, less, pg, or cat.
2891 This variable contains a command that produces the text of the
2892 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2893 "ypcat passwd" when NIS is used.
2894 On some systems, such as os390, there may be no equivalent
2895 command, in which case this variable is unset.
2897 patchlevel (patchlevel.U):
2898 The patchlevel level of this package.
2899 The value of patchlevel comes from the patchlevel.h file.
2900 In a version number such as 5.6.1, this is the "6".
2901 In patchlevel.h, this is referred to as "PERL_VERSION".
2904 This is an old synonym for p_ in Head.U, the character
2905 used to separate elements in the command shell search PATH.
2908 This variable contains the full path (if any) to a previously
2909 installed perl5.005 or later suitable for running the script
2910 to determine inc_version_list.
2913 This variable is defined but not used by Configure.
2914 The value is a plain '' and is not useful.
2916 PERL_REVISION (Oldsyms.U):
2917 In a Perl version number such as 5.6.2, this is the 5.
2918 This value is manually set in patchlevel.h
2920 PERL_SUBVERSION (Oldsyms.U):
2921 In a Perl version number such as 5.6.2, this is the 2.
2922 Values greater than 50 represent potentially unstable
2923 development subversions.
2924 This value is manually set in patchlevel.h
2926 PERL_VERSION (Oldsyms.U):
2927 In a Perl version number such as 5.6.2, this is the 6.
2928 This value is manually set in patchlevel.h
2930 perladmin (perladmin.U):
2931 Electronic mail address of the perl5 administrator.
2934 The list of libraries needed by Perl only (any libraries needed
2935 by extensions only will by dropped, if using dynamic loading).
2937 perlpath (perlpath.U):
2938 This variable contains the eventual value of the PERLPATH symbol,
2939 which contains the name of the perl interpreter to be used in
2940 shell scripts and in the "eval 'exec'" idiom.
2943 This variable is used internally by Configure to determine the
2944 full pathname (if any) of the pg program. After Configure runs,
2945 the value is reset to a plain "pg" and is not useful.
2947 phostname (myhostname.U):
2948 This variable contains the eventual value of the PHOSTNAME symbol,
2949 which is a command that can be fed to popen() to get the host name.
2950 The program should probably not presume that the domain is or isn't
2953 pidtype (pidtype.U):
2954 This variable defines PIDTYPE to be something like pid_t, int,
2955 ushort, or whatever type is used to declare process ids in the kernel.
2958 Holds the private path used by Configure to find out the libraries.
2959 Its value is prepend to libpth. This variable takes care of special
2960 machines, like the mips. Usually, it should be empty.
2962 pm_apiversion (xs_apiversion.U):
2963 This variable contains the version of the oldest perl
2964 compatible with the present perl. (That is, pure perl modules
2965 written for $pm_apiversion will still work for the current
2966 version). perl.c:incpush() and lib/lib.pm will automatically
2967 search in $sitelib for older directories across major versions
2968 back to pm_apiversion. This is only useful if you have a perl
2969 library directory tree structured like the default one. The
2970 versioned site_perl library was introduced in 5.005, so that's
2971 the default setting for this variable. It's hard to imagine
2972 it changing before Perl6. It is included here for symmetry
2973 with xs_apiveprsion -- the searching algorithms will
2974 (presumably) be similar.
2975 See the INSTALL file for how this works.
2978 This variable is defined but not used by Configure.
2979 The value is a plain '' and is not useful.
2982 This variable is defined but not used by Configure.
2983 The value is a plain '' and is not useful.
2986 This variable holds the name of the directory below which the
2987 user will install the package. Usually, this is /usr/local, and
2988 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2989 man pages in /usr/local/man, etc. It is only used to set defaults
2990 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2992 prefixexp (prefix.U):
2993 This variable holds the full absolute path of the directory below
2994 which the user will install the package. Derived from prefix.
2996 privlib (privlib.U):
2997 This variable contains the eventual value of the PRIVLIB symbol,
2998 which is the name of the private library for this package. It may
2999 have a ~ on the front. It is up to the makefile to eventually create
3000 this directory while performing installation (with ~ substitution).
3002 privlibexp (privlib.U):
3003 This variable is the ~name expanded version of privlib, so that you
3004 may use it directly in Makefiles or shell scripts.
3006 prototype (prototype.U):
3007 This variable holds the eventual value of CAN_PROTOTYPE, which
3008 indicates the C compiler can handle funciton prototypes.
3010 ptrsize (ptrsize.U):
3011 This variable contains the value of the PTRSIZE symbol, which
3012 indicates to the C program how many bytes there are in a pointer.
3014 quadkind (quadtype.U):
3015 This variable, if defined, encodes the type of a quad:
3016 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3018 quadtype (quadtype.U):
3019 This variable defines Quad_t to be something like long, int,
3020 long long, int64_t, or whatever type is used for 64-bit integers.
3022 randbits (randfunc.U):
3023 Indicates how many bits are produced by the function used to
3024 generate normalized random numbers.
3026 randfunc (randfunc.U):
3027 Indicates the name of the random number function to use.
3028 Values include drand48, random, and rand. In C programs,
3029 the 'Drand01' macro is defined to generate uniformly distributed
3030 random numbers over the range [0., 1.[ (see drand01 and nrand).
3032 randseedtype (randfunc.U):
3033 Indicates the type of the argument of the seedfunc.
3035 ranlib (orderlib.U):
3036 This variable is set to the pathname of the ranlib program, if it is
3037 needed to generate random libraries. Set to ":" if ar can generate
3038 random libraries or if random libraries are not supported
3040 rd_nodata (nblock_io.U):
3041 This variable holds the return code from read() when no data is
3042 present. It should be -1, but some systems return 0 when O_NDELAY is
3043 used, which is a shame because you cannot make the difference between
3044 no data and an EOF.. Sigh!
3046 revision (patchlevel.U):
3047 The value of revision comes from the patchlevel.h file.
3048 In a version number such as 5.6.1, this is the "5".
3049 In patchlevel.h, this is referred to as "PERL_REVISION".
3052 This variable is used internally by Configure to determine the
3053 full pathname (if any) of the rm program. After Configure runs,
3054 the value is reset to a plain "rm" and is not useful.
3057 This variable is defined but not used by Configure.
3058 The value is a plain '' and is not useful.
3061 This variable contains 'true' or 'false' depending whether the
3062 nm extraction should be performed or not, according to the value
3063 of usenm and the flags on the Configure command line.
3065 sched_yield (d_pthread_y.U):
3066 This variable defines the way to yield the execution
3067 of the current thread.
3069 scriptdir (scriptdir.U):
3070 This variable holds the name of the directory in which the user wants
3071 to put publicly scripts for the package in question. It is either
3072 the same directory as for binaries, or a special one that can be
3073 mounted across different architectures, like /usr/share. Programs
3074 must be prepared to deal with ~name expansion.
3076 scriptdirexp (scriptdir.U):
3077 This variable is the same as scriptdir, but is filename expanded
3078 at configuration time, for programs not wanting to bother with it.
3081 This variable is used internally by Configure to determine the
3082 full pathname (if any) of the sed program. After Configure runs,
3083 the value is reset to a plain "sed" and is not useful.
3085 seedfunc (randfunc.U):
3086 Indicates the random number generating seed function.
3087 Values include srand48, srandom, and srand.
3089 selectminbits (selectminbits.U):
3090 This variable holds the minimum number of bits operated by select.
3091 That is, if you do select(n, ...), how many bits at least will be
3092 cleared in the masks if some activity is detected. Usually this
3093 is either n or 32*ceil(n/32), especially many little-endians do
3094 the latter. This is only useful if you have select(), naturally.
3096 selecttype (selecttype.U):
3097 This variable holds the type used for the 2nd, 3rd, and 4th
3098 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3099 is defined, and 'int *' otherwise. This is only useful if you
3100 have select(), naturally.
3103 This variable is defined but not used by Configure.
3104 The value is a plain '' and is not useful.
3107 This variable contains the full pathname of the shell used
3108 on this system to execute Bourne shell scripts. Usually, this will be
3109 /bin/sh, though it's possible that some systems will have /bin/ksh,
3110 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3112 This unit comes before Options.U, so you can't set sh with a '-D'
3113 option, though you can override this (and startsh)
3114 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3117 This variable is defined but not used by Configure.
3118 The value is a plain '' and is not useful.
3120 sharpbang (spitshell.U):
3121 This variable contains the string #! if this system supports that
3124 shmattype (d_shmat.U):
3125 This symbol contains the type of pointer returned by shmat().
3126 It can be 'void *' or 'char *'.
3128 shortsize (intsize.U):
3129 This variable contains the value of the SHORTSIZE symbol which
3130 indicates to the C program how many bytes there are in a short.
3132 shrpenv (libperl.U):
3133 If the user builds a shared libperl.so, then we need to tell the
3134 'perl' executable where it will be able to find the installed libperl.so.
3135 One way to do this on some systems is to set the environment variable
3136 LD_RUN_PATH to the directory that will be the final location of the
3137 shared libperl.so. The makefile can use this with something like
3138 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3140 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3143 See the main perl Makefile.SH for actual working usage.
3144 Alternatively, we might be able to use a command line option such
3145 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3146 $archlibexp/CORE (Linux).
3148 shsharp (spitshell.U):
3149 This variable tells further Configure units whether your sh can
3152 sig_count (sig_name.U):
3153 This variable holds a number larger than the largest valid
3154 signal number. This is usually the same as the NSIG macro.
3156 sig_name (sig_name.U):
3157 This variable holds the signal names, space separated. The leading
3158 SIG in signal name is removed. A ZERO is prepended to the
3159 list. This is currently not used.
3161 sig_name_init (sig_name.U):
3162 This variable holds the signal names, enclosed in double quotes and
3163 separated by commas, suitable for use in the SIG_NAME definition
3164 below. A "ZERO" is prepended to the list, and the list is
3165 terminated with a plain 0. The leading SIG in signal names
3166 is removed. See sig_num.
3168 sig_num (sig_name.U):
3169 This variable holds the signal numbers, space separated. A ZERO is
3170 prepended to the list (corresponding to the fake SIGZERO), and
3171 the list is terminated with a 0. Those numbers correspond to
3172 the value of the signal listed in the same place within the
3175 sig_num_init (sig_name.U):
3176 This variable holds the signal numbers, enclosed in double quotes and
3177 separated by commas, suitable for use in the SIG_NUM definition
3178 below. A "ZERO" is prepended to the list, and the list is
3179 terminated with a plain 0.
3181 signal_t (d_voidsig.U):
3182 This variable holds the type of the signal handler (void or int).
3184 sitearch (sitearch.U):
3185 This variable contains the eventual value of the SITEARCH symbol,
3186 which is the name of the private library for this package. It may
3187 have a ~ on the front. It is up to the makefile to eventually create
3188 this directory while performing installation (with ~ substitution).
3189 The standard distribution will put nothing in this directory.
3190 After perl has been installed, users may install their own local
3191 architecture-dependent modules in this directory with
3192 MakeMaker Makefile.PL
3193 or equivalent. See INSTALL for details.
3195 sitearchexp (sitearch.U):
3196 This variable is the ~name expanded version of sitearch, so that you
3197 may use it directly in Makefiles or shell scripts.
3199 sitebin (sitebin.U):
3200 This variable holds the name of the directory in which the user wants
3201 to put add-on publicly executable files for the package in question. It
3202 is most often a local directory such as /usr/local/bin. Programs using
3203 this variable must be prepared to deal with ~name substitution.
3204 The standard distribution will put nothing in this directory.
3205 After perl has been installed, users may install their own local
3206 executables in this directory with
3207 MakeMaker Makefile.PL
3208 or equivalent. See INSTALL for details.
3210 sitebinexp (sitebin.U):
3211 This is the same as the sitebin variable, but is filename expanded at
3212 configuration time, for use in your makefiles.
3214 sitelib (sitelib.U):
3215 This variable contains the eventual value of the SITELIB symbol,
3216 which is the name of the private library for this package. It may
3217 have a ~ on the front. It is up to the makefile to eventually create
3218 this directory while performing installation (with ~ substitution).
3219 The standard distribution will put nothing in this directory.
3220 After perl has been installed, users may install their own local
3221 architecture-independent modules in this directory with
3222 MakeMaker Makefile.PL
3223 or equivalent. See INSTALL for details.
3225 sitelib_stem (sitelib.U):
3226 This variable is $sitelibexp with any trailing version-specific component
3227 removed. The elements in inc_version_list (inc_version_list.U) can
3228 be tacked onto this variable to generate a list of directories to search.
3230 sitelibexp (sitelib.U):
3231 This variable is the ~name expanded version of sitelib, so that you
3232 may use it directly in Makefiles or shell scripts.
3234 siteprefix (siteprefix.U):
3235 This variable holds the full absolute path of the directory below
3236 which the user will install add-on packages.
3237 See INSTALL for usage and examples.
3239 siteprefixexp (siteprefix.U):
3240 This variable holds the full absolute path of the directory below
3241 which the user will install add-on packages. Derived from siteprefix.
3243 sizesize (sizesize.U):
3244 This variable contains the size of a sizetype in bytes.
3246 sizetype (sizetype.U):
3247 This variable defines sizetype to be something like size_t,
3248 unsigned long, or whatever type is used to declare length
3249 parameters for string functions.
3252 This variable is defined but not used by Configure.
3253 The value is a plain '' and is not useful.
3256 This variable is defined but not used by Configure.
3257 The value is a plain '' and is not useful.
3260 This variable holds the extension used to identify shared libraries
3261 (also known as shared objects) on the system. Usually set to 'so'.
3263 sockethdr (d_socket.U):
3264 This variable has any cpp '-I' flags needed for socket support.
3266 socketlib (d_socket.U):
3267 This variable has the names of any libraries needed for socket support.
3269 socksizetype (socksizetype.U):
3270 This variable holds the type used for the size argument
3271 for various socket calls like accept. Usual values include
3272 socklen_t, size_t, and int.
3275 This variable is used internally by Configure to determine the
3276 full pathname (if any) of the sort program. After Configure runs,
3277 the value is reset to a plain "sort" and is not useful.
3279 spackage (package.U):
3280 This variable contains the name of the package being constructed,
3281 with the first letter uppercased, i.e. suitable for starting
3284 spitshell (spitshell.U):
3285 This variable contains the command necessary to spit out a runnable
3286 shell on this system. It is either cat or a grep '-v' for # comments.
3288 sPRId64 (quadfio.U):
3289 This variable, if defined, contains the string used by stdio to
3290 format 64-bit decimal numbers (format 'd') for output.
3292 sPRIeldbl (longdblfio.U):
3293 This variable, if defined, contains the string used by stdio to
3294 format long doubles (format 'e') for output.
3296 sPRIEUldbl (longdblfio.U):
3297 This variable, if defined, contains the string used by stdio to
3298 format long doubles (format 'E') for output.
3299 The 'U' in the name is to separate this from sPRIeldbl so that even
3300 case-blind systems can see the difference.
3302 sPRIfldbl (longdblfio.U):
3303 This variable, if defined, contains the string used by stdio to
3304 format long doubles (format 'f') for output.
3306 sPRIFUldbl (longdblfio.U):
3307 This variable, if defined, contains the string used by stdio to
3308 format long doubles (format 'F') for output.
3309 The 'U' in the name is to separate this from sPRIfldbl so that even
3310 case-blind systems can see the difference.
3312 sPRIgldbl (longdblfio.U):
3313 This variable, if defined, contains the string used by stdio to
3314 format long doubles (format 'g') for output.
3316 sPRIGUldbl (longdblfio.U):
3317 This variable, if defined, contains the string used by stdio to
3318 format long doubles (format 'G') for output.
3319 The 'U' in the name is to separate this from sPRIgldbl so that even
3320 case-blind systems can see the difference.
3322 sPRIi64 (quadfio.U):
3323 This variable, if defined, contains the string used by stdio to
3324 format 64-bit decimal numbers (format 'i') for output.
3326 sPRIo64 (quadfio.U):
3327 This variable, if defined, contains the string used by stdio to
3328 format 64-bit octal numbers (format 'o') for output.
3330 sPRIu64 (quadfio.U):
3331 This variable, if defined, contains the string used by stdio to
3332 format 64-bit unsigned decimal numbers (format 'u') for output.
3334 sPRIx64 (quadfio.U):
3335 This variable, if defined, contains the string used by stdio to
3336 format 64-bit hexadecimal numbers (format 'x') for output.
3338 sPRIXU64 (quadfio.U):
3339 This variable, if defined, contains the string used by stdio to
3340 format 64-bit hExADECimAl numbers (format 'X') for output.
3341 The 'U' in the name is to separate this from sPRIx64 so that even
3342 case-blind systems can see the difference.
3345 This variable holds the path to the package source. It is up to
3346 the Makefile to use this variable and set VPATH accordingly to
3347 find the sources remotely.
3349 sSCNfldbl (longdblfio.U):
3350 This variable, if defined, contains the string used by stdio to
3351 format long doubles (format 'f') for input.
3353 ssizetype (ssizetype.U):
3354 This variable defines ssizetype to be something like ssize_t,
3355 long or int. It is used by functions that return a count
3356 of bytes or an error condition. It must be a signed type.
3357 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3359 startperl (startperl.U):
3360 This variable contains the string to put on the front of a perl
3361 script to make sure (hopefully) that it runs with perl and not some
3362 shell. Of course, that leading line must be followed by the classical
3364 eval 'exec perl -S $0 ${1+"$@"}'
3365 if $running_under_some_shell;
3366 to guarantee perl startup should the shell execute the script. Note
3367 that this magic incatation is not understood by csh.
3369 startsh (startsh.U):
3370 This variable contains the string to put on the front of a shell
3371 script to make sure (hopefully) that it runs with sh and not some
3374 static_ext (Extensions.U):
3375 This variable holds a list of XS extension files we want to
3376 link statically into the package. It is used by Makefile.
3378 stdchar (stdchar.U):
3379 This variable conditionally defines STDCHAR to be the type of char
3380 used in stdio.h. It has the values "unsigned char" or "char".
3382 stdio_base (d_stdstdio.U):
3383 This variable defines how, given a FILE pointer, fp, to access the
3384 _base field (or equivalent) of stdio.h's FILE structure. This will
3385 be used to define the macro FILE_base(fp).
3387 stdio_bufsiz (d_stdstdio.U):
3388 This variable defines how, given a FILE pointer, fp, to determine
3389 the number of bytes store in the I/O buffer pointer to by the
3390 _base field (or equivalent) of stdio.h's FILE structure. This will
3391 be used to define the macro FILE_bufsiz(fp).
3393 stdio_cnt (d_stdstdio.U):
3394 This variable defines how, given a FILE pointer, fp, to access the
3395 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3396 be used to define the macro FILE_cnt(fp).
3398 stdio_filbuf (d_stdstdio.U):
3399 This variable defines how, given a FILE pointer, fp, to tell
3400 stdio to refill it's internal buffers (?). This will
3401 be used to define the macro FILE_filbuf(fp).
3403 stdio_ptr (d_stdstdio.U):
3404 This variable defines how, given a FILE pointer, fp, to access the
3405 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3406 be used to define the macro FILE_ptr(fp).
3408 stdio_stream_array (stdio_streams.U):
3409 This variable tells the name of the array holding the stdio streams.
3410 Usual values include _iob, __iob, and __sF.
3412 strings (i_string.U):
3413 This variable holds the full path of the string header that will be
3414 used. Typically /usr/include/string.h or /usr/include/strings.h.
3417 This variable is defined but not used by Configure.
3418 The value is a plain '' and is not useful.
3420 subversion (patchlevel.U):
3421 The subversion level of this package.
3422 The value of subversion comes from the patchlevel.h file.
3423 In a version number such as 5.6.1, this is the "1".
3424 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3425 This is unique to perl.
3428 This variable holds the place where the manual is located on this
3429 system. It is not the place where the user wants to put his manual
3430 pages. Rather it is the place where Configure may look to find manual
3431 for unix commands (section 1 of the manual usually). See mansrc.
3434 This variable is defined but not used by Configure.
3435 The value is a plain '' and is not useful.
3438 This variable is defined but not used by Configure.
3439 The value is a plain '' and is not useful.
3442 This variable is defined but not used by Configure.
3443 The value is a plain '' and is not useful.
3446 This variable is defined but not used by Configure.
3447 The value is a plain '' and is not useful.
3450 This variable is used internally by Configure to determine the
3451 full pathname (if any) of the test program. After Configure runs,
3452 the value is reset to a plain "test" and is not useful.
3454 timeincl (i_time.U):
3455 This variable holds the full path of the included time header(s).
3457 timetype (d_time.U):
3458 This variable holds the type returned by time(). It can be long,
3459 or time_t on BSD sites (in which case <sys/types.h> should be
3460 included). Anyway, the type Time_t should be used.
3463 This variable is used internally by Configure to determine the
3464 full pathname (if any) of the touch program. After Configure runs,
3465 the value is reset to a plain "touch" and is not useful.
3468 This variable is used internally by Configure to determine the
3469 full pathname (if any) of the tr program. After Configure runs,
3470 the value is reset to a plain "tr" and is not useful.
3473 This variable contains the value to be passed to the tr(1)
3474 command to transliterate a newline. Typical values are
3475 '\012' and '\n'. This is needed for EBCDIC systems where
3476 newline is not necessarily '\012'.
3479 This variable is defined but not used by Configure.
3480 The value is a plain '' and is not useful.
3483 This variable is the size of an U16 in bytes.
3486 This variable contains the C type used for Perl's U16.
3489 This variable is the size of an U32 in bytes.
3492 This variable contains the C type used for Perl's U32.
3495 This variable is the size of an U64 in bytes.
3498 This variable contains the C type used for Perl's U64.
3501 This variable is the size of an U8 in bytes.
3504 This variable contains the C type used for Perl's U8.
3507 This variable contains the format string used for printing a Uid_t.
3509 uidsign (uidsign.U):
3510 This variable contains the signedness of a uidtype.
3511 1 for unsigned, -1 for signed.
3513 uidsize (uidsize.U):
3514 This variable contains the size of a uidtype in bytes.
3516 uidtype (uidtype.U):
3517 This variable defines Uid_t to be something like uid_t, int,
3518 ushort, or whatever type is used to declare user ids in the kernel.
3521 This variable is used internally by Configure to determine the
3522 full pathname (if any) of the uname program. After Configure runs,
3523 the value is reset to a plain "uname" and is not useful.
3526 This variable is used internally by Configure to determine the
3527 full pathname (if any) of the uniq program. After Configure runs,
3528 the value is reset to a plain "uniq" and is not useful.
3530 uquadtype (quadtype.U):
3531 This variable defines Uquad_t to be something like unsigned long,
3532 unsigned int, unsigned long long, uint64_t, or whatever type is
3533 used for 64-bit integers.
3535 use5005threads (usethreads.U):
3536 This variable conditionally defines the USE_5005THREADS symbol,
3537 and indicates that Perl should be built to use the 5.005-based
3538 threading implementation.
3540 use64bitall (use64bits.U):
3541 This variable conditionally defines the USE_64_BIT_ALL symbol,
3542 and indicates that 64-bit integer types should be used
3543 when available. The maximal possible
3544 64-bitness is employed: LP64 or ILP64, meaning that you will
3545 be able to use more than 2 gigabytes of memory. This mode is
3546 even more binary incompatible than USE_64_BIT_INT. You may not
3547 be able to run the resulting executable in a 32-bit CPU at all or
3548 you may need at least to reboot your OS to 64-bit mode.
3550 use64bitint (use64bits.U):
3551 This variable conditionally defines the USE_64_BIT_INT symbol,
3552 and indicates that 64-bit integer types should be used
3553 when available. The minimal possible 64-bitness
3554 is employed, just enough to get 64-bit integers into Perl.
3555 This may mean using for example "long longs", while your memory
3556 may still be limited to 2 gigabytes.
3559 This variable indicates if the system supports dynamic
3560 loading of some sort. See also dlsrc and dlobj.
3562 useithreads (usethreads.U):
3563 This variable conditionally defines the USE_ITHREADS symbol,
3564 and indicates that Perl should be built to use the interpreter-based
3565 threading implementation.
3567 uselargefiles (uselfs.U):
3568 This variable conditionally defines the USE_LARGE_FILES symbol,
3569 and indicates that large file interfaces should be used when
3572 uselongdouble (uselongdbl.U):
3573 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3574 and indicates that long doubles should be used when available.
3576 usemorebits (usemorebits.U):
3577 This variable conditionally defines the USE_MORE_BITS symbol,
3578 and indicates that explicit 64-bit interfaces and long doubles
3579 should be used when available.
3581 usemultiplicity (usemultiplicity.U):
3582 This variable conditionally defines the MULTIPLICITY symbol,
3583 and indicates that Perl should be built to use multiplicity.
3585 usemymalloc (mallocsrc.U):
3586 This variable contains y if the malloc that comes with this package
3587 is desired over the system's version of malloc. People often include
3588 special versions of malloc for effiency, but such versions are often
3589 less portable. See also mallocsrc and mallocobj.
3590 If this is 'y', then -lmalloc is removed from $libs.
3593 This variable contains 'true' or 'false' depending whether the
3594 nm extraction is wanted or not.
3596 useopcode (Extensions.U):
3597 This variable holds either 'true' or 'false' to indicate
3598 whether the Opcode extension should be used. The sole
3599 use for this currently is to allow an easy mechanism
3600 for users to skip the Opcode extension from the Configure
3603 useperlio (useperlio.U):
3604 This variable conditionally defines the USE_PERLIO symbol,
3605 and indicates that the PerlIO abstraction should be
3608 useposix (Extensions.U):
3609 This variable holds either 'true' or 'false' to indicate
3610 whether the POSIX extension should be used. The sole
3611 use for this currently is to allow an easy mechanism
3612 for hints files to indicate that POSIX will not compile
3613 on a particular system.
3616 This variable is set to true when the user agrees to use sfio.
3617 It is set to false when sfio is not available or when the user
3618 explicitely requests not to use sfio. It is here primarily so
3619 that command-line settings can override the auto-detection of
3620 d_sfio without running into a "WHOA THERE".
3622 useshrplib (libperl.U):
3623 This variable is set to 'yes' if the user wishes
3624 to build a shared libperl, and 'no' otherwise.
3626 usesocks (usesocks.U):
3627 This variable conditionally defines the USE_SOCKS symbol,
3628 and indicates that Perl should be built to use SOCKS.
3630 usethreads (usethreads.U):
3631 This variable conditionally defines the USE_THREADS symbol,
3632 and indicates that Perl should be built to use threads.
3634 usevendorprefix (vendorprefix.U):
3635 This variable tells whether the vendorprefix
3636 and consequently other vendor* paths are in use.
3638 usevfork (d_vfork.U):
3639 This variable is set to true when the user accepts to use vfork.
3640 It is set to false when no vfork is available or when the user
3641 explicitely requests not to use vfork.
3644 This variable holds the path of the include files, which is
3645 usually /usr/include. It is mainly used by other Configure units.
3648 This variable is defined but not used by Configure.
3649 The value is a plain '' and is not useful.
3651 uvoformat (perlxvf.U):
3652 This variable contains the format string used for printing
3653 a Perl UV as an unsigned octal integer.
3656 This variable is the size of a UV in bytes.
3659 This variable contains the C type used for Perl's UV.
3661 uvuformat (perlxvf.U):
3662 This variable contains the format string used for printing
3663 a Perl UV as an unsigned decimal integer.
3665 uvxformat (perlxvf.U):
3666 This variable contains the format string used for printing
3667 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3669 uvXUformat (perlxvf.U):
3670 This variable contains the format string used for printing
3671 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3673 vendorarch (vendorarch.U):
3674 This variable contains the value of the PERL_VENDORARCH symbol.
3675 It may have a ~ on the front.
3676 The standard distribution will put nothing in this directory.
3677 Vendors who distribute perl may wish to place their own
3678 architecture-dependent modules and extensions in this directory with
3679 MakeMaker Makefile.PL INSTALLDIRS=vendor
3680 or equivalent. See INSTALL for details.
3682 vendorarchexp (vendorarch.U):
3683 This variable is the ~name expanded version of vendorarch, so that you
3684 may use it directly in Makefiles or shell scripts.
3686 vendorbin (vendorbin.U):
3687 This variable contains the eventual value of the VENDORBIN symbol.
3688 It may have a ~ on the front.
3689 The standard distribution will put nothing in this directory.
3690 Vendors who distribute perl may wish to place additional
3691 binaries in this directory with
3692 MakeMaker Makefile.PL INSTALLDIRS=vendor
3693 or equivalent. See INSTALL for details.
3695 vendorbinexp (vendorbin.U):
3696 This variable is the ~name expanded version of vendorbin, so that you
3697 may use it directly in Makefiles or shell scripts.
3699 vendorlib (vendorlib.U):
3700 This variable contains the eventual value of the VENDORLIB symbol,
3701 which is the name of the private library for this package.
3702 The standard distribution will put nothing in this directory.
3703 Vendors who distribute perl may wish to place their own
3704 modules in this directory with
3705 MakeMaker Makefile.PL INSTALLDIRS=vendor
3706 or equivalent. See INSTALL for details.
3708 vendorlib_stem (vendorlib.U):
3709 This variable is $vendorlibexp with any trailing version-specific component
3710 removed. The elements in inc_version_list (inc_version_list.U) can
3711 be tacked onto this variable to generate a list of directories to search.
3713 vendorlibexp (vendorlib.U):
3714 This variable is the ~name expanded version of vendorlib, so that you
3715 may use it directly in Makefiles or shell scripts.
3717 vendorprefix (vendorprefix.U):
3718 This variable holds the full absolute path of the directory below
3719 which the vendor will install add-on packages.
3720 See INSTALL for usage and examples.
3722 vendorprefixexp (vendorprefix.U):
3723 This variable holds the full absolute path of the directory below
3724 which the vendor will install add-on packages. Derived from vendorprefix.
3726 version (patchlevel.U):
3727 The full version number of this package, such as 5.6.1 (or 5_6_1).
3728 This combines revision, patchlevel, and subversion to get the
3729 full version number, including any possible subversions.
3730 This is suitable for use as a directory name, and hence is
3731 filesystem dependent.
3733 versiononly (versiononly.U):
3734 If set, this symbol indicates that only the version-specific
3735 components of a perl installation should be installed.
3736 This may be useful for making a test installation of a new
3737 version without disturbing the existing installation.
3738 Setting versiononly is equivalent to setting installperl's -v option.
3739 In particular, the non-versioned scripts and programs such as
3740 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3741 (see INSTALL for a more complete list). Nor are the man
3743 Usually, this is undef.
3746 This variable is defined but not used by Configure.
3747 The value is a plain '' and is not useful.
3749 voidflags (voidflags.U):
3750 This variable contains the eventual value of the VOIDFLAGS symbol,
3751 which indicates how much support of the void type is given by this
3752 compiler. See VOIDFLAGS for more info.
3755 This variable holds extra path (space-separated) used to find
3756 libraries on this platform, for example CPU-specific libraries
3757 (on multi-CPU platforms) may be listed here.
3759 xs_apiversion (xs_apiversion.U):
3760 This variable contains the version of the oldest perl binary
3761 compatible with the present perl. perl.c:incpush() and
3762 lib/lib.pm will automatically search in $sitearch for older
3763 directories across major versions back to xs_apiversion.
3764 This is only useful if you have a perl library directory tree
3765 structured like the default one.
3766 See INSTALL for how this works.
3767 The versioned site_perl directory was introduced in 5.005,
3768 so that is the lowest possible value.
3769 Since this can depend on compile time options (such as
3770 bincompat) it is set by Configure. Other non-default sources
3771 of potential incompatibility, such as multiplicity, threads,
3772 debugging, 64bits, sfio, etc., are not checked for currently,
3773 though in principle we could go snooping around in old
3777 This variable is defined but not used by Configure.
3778 The value is a plain '' and is not useful.
3781 This variable is used internally by Configure to determine the
3782 full pathname (if any) of the zip program. After Configure runs,
3783 the value is reset to a plain "zip" and is not useful.