1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
122 This variable is used internally by Configure to determine the
123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
127 The base revision level of this package, from the .package file.
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
139 bincompat5005 (bincompat5005.U):
140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
153 This variable is used internally by Configure to determine the
154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
157 byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
168 castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
187 cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
203 ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
214 ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
218 The list is a space-separated list of symbol=value tokens.
220 ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
229 cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
237 charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
246 This variable is defined but not used by Configure.
247 The value is a plain '' and is not useful.
250 This variable is defined but not used by Configure.
251 The value is a plain '' and is not useful.
253 clocktype (d_times.U):
254 This variable holds the type returned by times(). It can be long,
255 or clock_t on BSD sites (in which case <sys/types.h> should be
259 This variable is used internally by Configure to determine the
260 full pathname (if any) of the comm program. After Configure runs,
261 the value is reset to a plain "comm" and is not useful.
264 This variable is defined but not used by Configure.
265 The value is a plain '' and is not useful.
267 contains (contains.U):
268 This variable holds the command to do a grep with a proper return
269 status. On most sane systems it is simply "grep". On insane systems
270 it is a grep followed by a cat followed by a test. This variable
271 is primarily for the use of other Configure units.
274 This variable is used internally by Configure to determine the
275 full pathname (if any) of the cp program. After Configure runs,
276 the value is reset to a plain "cp" and is not useful.
279 This variable is defined but not used by Configure.
280 The value is a plain '' and is not useful.
283 This variable is used internally by Configure to determine the
284 full pathname (if any) of the cpp program. After Configure runs,
285 the value is reset to a plain "cpp" and is not useful.
287 cpp_stuff (cpp_stuff.U):
288 This variable contains an identification of the catenation mechanism
289 used by the C preprocessor.
291 cppccsymbols (Cppsym.U):
292 The variable contains the symbols defined by the C compiler
293 when it calls cpp. The symbols defined by the cc alone or cpp
294 alone are not in this list, see ccsymbols and cppsymbols.
295 The list is a space-separated list of symbol=value tokens.
297 cppflags (ccflags.U):
298 This variable holds the flags that will be passed to the C pre-
299 processor. It is up to the Makefile to use it.
301 cpplast (cppstdin.U):
302 This variable has the same functionality as cppminus, only it applies
303 to cpprun and not cppstdin.
305 cppminus (cppstdin.U):
306 This variable contains the second part of the string which will invoke
307 the C preprocessor on the standard input and produce to standard
308 output. This variable will have the value "-" if cppstdin needs
309 a minus to specify standard input, otherwise the value is "".
312 This variable contains the command which will invoke a C preprocessor
313 on standard input and put the output to stdout. It is guaranteed not
314 to be a wrapper and may be a null string if no preprocessor can be
315 made directly available. This preprocessor might be different from the
316 one used by the C compiler. Don't forget to append cpplast after the
317 preprocessor options.
319 cppstdin (cppstdin.U):
320 This variable contains the command which will invoke the C
321 preprocessor on standard input and put the output to stdout.
322 It is primarily used by other Configure units that ask about
323 preprocessor symbols.
325 cppsymbols (Cppsym.U):
326 The variable contains the symbols defined by the C preprocessor
327 alone. The symbols defined by cc or by cc when it calls cpp are
328 not in this list, see ccsymbols and cppccsymbols.
329 The list is a space-separated list of symbol=value tokens.
331 crosscompile (crosscompile.U):
332 This variable conditionally defines the CROSSCOMPILE symbol
333 which signifies that the build process is be a cross-compilation.
334 This is normally set by hints files or from Configure command line.
336 cryptlib (d_crypt.U):
337 This variable holds -lcrypt or the path to a libcrypt.a archive if
338 the crypt() function is not defined in the standard C library. It is
339 up to the Makefile to use this.
342 This variable is used internally by Configure to determine the
343 full pathname (if any) of the csh program. After Configure runs,
344 the value is reset to a plain "csh" and is not useful.
346 d__fwalk (d__fwalk.U):
347 This variable conditionally defines HAS__FWALK if _fwalk() is
348 available to apply a function to all the file handles.
350 d_access (d_access.U):
351 This variable conditionally defines HAS_ACCESS if the access() system
352 call is available to check for access permissions using real IDs.
354 d_accessx (d_accessx.U):
355 This variable conditionally defines the HAS_ACCESSX symbol, which
356 indicates to the C program that the accessx() routine is available.
359 This variable conditionally defines the HAS_ALARM symbol, which
360 indicates to the C program that the alarm() routine is available.
362 d_archlib (archlib.U):
363 This variable conditionally defines ARCHLIB to hold the pathname
364 of architecture-dependent library files for $package. If
365 $archlib is the same as $privlib, then this is set to undef.
368 This variable conditionally defines the HAS_ATOLF symbol, which
369 indicates to the C program that the atolf() routine is available.
372 This variable conditionally defines the HAS_ATOLL symbol, which
373 indicates to the C program that the atoll() routine is available.
375 d_attribut (d_attribut.U):
376 This variable conditionally defines HASATTRIBUTE, which
377 indicates the C compiler can check for function attributes,
378 such as printf formats.
381 This variable conditionally defines the HAS_BCMP symbol if
382 the bcmp() routine is available to compare strings.
385 This variable conditionally defines the HAS_BCOPY symbol if
386 the bcopy() routine is available to copy strings.
388 d_bincompat5005 (bincompat5005.U):
389 This variable conditionally defines BINCOMPAT5005 so that embed.h
390 can take special action if this version of Perl should be
391 binary-compatible with Perl 5.005. This is impossible for builds
392 that use features like threads and multiplicity it is always $undef
396 This symbol conditionally defines the symbol BSD when running on a
399 d_bsdgetpgrp (d_getpgrp.U):
400 This variable conditionally defines USE_BSD_GETPGRP if
401 getpgrp needs one arguments whereas USG one needs none.
403 d_bsdsetpgrp (d_setpgrp.U):
404 This variable conditionally defines USE_BSD_SETPGRP if
405 setpgrp needs two arguments whereas USG one needs none.
406 See also d_setpgid for a POSIX interface.
409 This variable conditionally defines the HAS_BZERO symbol if
410 the bzero() routine is available to set memory to 0.
412 d_casti32 (d_casti32.U):
413 This variable conditionally defines CASTI32, which indicates
414 whether the C compiler can cast large floats to 32-bit ints.
416 d_castneg (d_castneg.U):
417 This variable conditionally defines CASTNEG, which indicates
418 wether the C compiler can cast negative float to unsigned.
420 d_charvspr (d_vprintf.U):
421 This variable conditionally defines CHARVSPRINTF if this system
422 has vsprintf returning type (char*). The trend seems to be to
423 declare it as "int vsprintf()".
426 This variable conditionally defines the HAS_CHOWN symbol, which
427 indicates to the C program that the chown() routine is available.
429 d_chroot (d_chroot.U):
430 This variable conditionally defines the HAS_CHROOT symbol, which
431 indicates to the C program that the chroot() routine is available.
433 d_chsize (d_chsize.U):
434 This variable conditionally defines the CHSIZE symbol, which
435 indicates to the C program that the chsize() routine is available
436 to truncate files. You might need a -lx to get this routine.
438 d_closedir (d_closedir.U):
439 This variable conditionally defines HAS_CLOSEDIR if closedir() is
442 d_cmsghdr_s (d_cmsghdr_s.U):
443 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
444 which indicates that the struct cmsghdr is supported.
447 This variable conditionally defines the HASCONST symbol, which
448 indicates to the C program that this C compiler knows about the
452 This variable conditionally defines the CRYPT symbol, which
453 indicates to the C program that the crypt() routine is available
454 to encrypt passwords and the like.
457 This variable conditionally defines the CSH symbol, which
458 indicates to the C program that the C-shell exists.
460 d_cuserid (d_cuserid.U):
461 This variable conditionally defines the HAS_CUSERID symbol, which
462 indicates to the C program that the cuserid() routine is available
463 to get character login names.
465 d_dbl_dig (d_dbl_dig.U):
466 This variable conditionally defines d_dbl_dig if this system's
467 header files provide DBL_DIG, which is the number of significant
468 digits in a double precision number.
470 d_difftime (d_difftime.U):
471 This variable conditionally defines the HAS_DIFFTIME symbol, which
472 indicates to the C program that the difftime() routine is available.
474 d_dirnamlen (i_dirent.U):
475 This variable conditionally defines DIRNAMLEN, which indicates
476 to the C program that the length of directory entry names is
477 provided by a d_namelen field.
479 d_dlerror (d_dlerror.U):
480 This variable conditionally defines the HAS_DLERROR symbol, which
481 indicates to the C program that the dlerror() routine is available.
483 d_dlopen (d_dlopen.U):
484 This variable conditionally defines the HAS_DLOPEN symbol, which
485 indicates to the C program that the dlopen() routine is available.
487 d_dlsymun (d_dlsymun.U):
488 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
489 indicates that we need to prepend an underscore to the symbol
490 name before calling dlsym().
492 d_dosuid (d_dosuid.U):
493 This variable conditionally defines the symbol DOSUID, which
494 tells the C program that it should insert setuid emulation code
495 on hosts which have setuid #! scripts disabled.
497 d_drand48proto (d_drand48proto.U):
498 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
499 which indicates to the C program that the system provides
500 a prototype for the drand48() function. Otherwise, it is
501 up to the program to supply one.
504 This variable conditionally defines HAS_DUP2 if dup2() is
505 available to duplicate file descriptors.
507 d_eaccess (d_eaccess.U):
508 This variable conditionally defines the HAS_EACCESS symbol, which
509 indicates to the C program that the eaccess() routine is available.
511 d_endgrent (d_endgrent.U):
512 This variable conditionally defines the HAS_ENDGRENT symbol, which
513 indicates to the C program that the endgrent() routine is available
514 for sequential access of the group database.
516 d_endhent (d_endhent.U):
517 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
518 available to close whatever was being used for host queries.
520 d_endnent (d_endnent.U):
521 This variable conditionally defines HAS_ENDNETENT if endnetent() is
522 available to close whatever was being used for network queries.
524 d_endpent (d_endpent.U):
525 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
526 available to close whatever was being used for protocol queries.
528 d_endpwent (d_endpwent.U):
529 This variable conditionally defines the HAS_ENDPWENT symbol, which
530 indicates to the C program that the endpwent() routine is available
531 for sequential access of the passwd database.
533 d_endsent (d_endsent.U):
534 This variable conditionally defines HAS_ENDSERVENT if endservent() is
535 available to close whatever was being used for service queries.
537 d_eofnblk (nblock_io.U):
538 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
539 when reading from a non-blocking I/O source.
542 This variable conditionally defines the symbols EUNICE and VAX, which
543 alerts the C program that it must deal with ideosyncracies of VMS.
545 d_fchmod (d_fchmod.U):
546 This variable conditionally defines the HAS_FCHMOD symbol, which
547 indicates to the C program that the fchmod() routine is available
548 to change mode of opened files.
550 d_fchown (d_fchown.U):
551 This variable conditionally defines the HAS_FCHOWN symbol, which
552 indicates to the C program that the fchown() routine is available
553 to change ownership of opened files.
556 This variable conditionally defines the HAS_FCNTL symbol, and indicates
557 whether the fcntl() function exists
559 d_fcntl_can_lock (d_fcntl_can_lock.U):
560 This variable conditionally defines the FCNTL_CAN_LOCK symbol
561 and indicates whether file locking with fcntl() works.
563 d_fd_macros (d_fd_set.U):
564 This variable contains the eventual value of the HAS_FD_MACROS symbol,
565 which indicates if your C compiler knows about the macros which
566 manipulate an fd_set.
568 d_fd_set (d_fd_set.U):
569 This variable contains the eventual value of the HAS_FD_SET symbol,
570 which indicates if your C compiler knows about the fd_set typedef.
572 d_fds_bits (d_fd_set.U):
573 This variable contains the eventual value of the HAS_FDS_BITS symbol,
574 which indicates if your fd_set typedef contains the fds_bits member.
575 If you have an fd_set typedef, but the dweebs who installed it did
576 a half-fast job and neglected to provide the macros to manipulate
577 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
579 d_fgetpos (d_fgetpos.U):
580 This variable conditionally defines HAS_FGETPOS if fgetpos() is
581 available to get the file position indicator.
583 d_flexfnam (d_flexfnam.U):
584 This variable conditionally defines the FLEXFILENAMES symbol, which
585 indicates that the system supports filenames longer than 14 characters.
588 This variable conditionally defines HAS_FLOCK if flock() is
589 available to do file locking.
592 This variable conditionally defines the HAS_FORK symbol, which
593 indicates to the C program that the fork() routine is available.
595 d_fpathconf (d_pathconf.U):
596 This variable conditionally defines the HAS_FPATHCONF symbol, which
597 indicates to the C program that the pathconf() routine is available
598 to determine file-system related limits and options associated
599 with a given open file descriptor.
601 d_fpos64_t (d_fpos64_t.U):
602 This symbol will be defined if the C compiler supports fpos64_t.
604 d_frexpl (d_frexpl.U):
605 This variable conditionally defines the HAS_FREXPL symbol, which
606 indicates to the C program that the frexpl() routine is available.
608 d_fs_data_s (d_fs_data_s.U):
609 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
610 which indicates that the struct fs_data is supported.
612 d_fseeko (d_fseeko.U):
613 This variable conditionally defines the HAS_FSEEKO symbol, which
614 indicates to the C program that the fseeko() routine is available.
616 d_fsetpos (d_fsetpos.U):
617 This variable conditionally defines HAS_FSETPOS if fsetpos() is
618 available to set the file position indicator.
620 d_fstatfs (d_fstatfs.U):
621 This variable conditionally defines the HAS_FSTATFS symbol, which
622 indicates to the C program that the fstatfs() routine is available.
624 d_fstatvfs (d_statvfs.U):
625 This variable conditionally defines the HAS_FSTATVFS symbol, which
626 indicates to the C program that the fstatvfs() routine is available.
629 This variable conditionally defines the HAS_FSYNC symbol, which
630 indicates to the C program that the fsync() routine is available.
632 d_ftello (d_ftello.U):
633 This variable conditionally defines the HAS_FTELLO symbol, which
634 indicates to the C program that the ftello() routine is available.
637 This variable conditionally defines the HAS_FTIME symbol, which indicates
638 that the ftime() routine exists. The ftime() routine is basically
639 a sub-second accuracy clock.
641 d_Gconvert (d_gconvert.U):
642 This variable holds what Gconvert is defined as to convert
643 floating point numbers into strings. It could be 'gconvert'
644 or a more complex macro emulating gconvert with gcvt() or sprintf.
646 d_Gconvert='gconvert((x),(n),(t),(b))'
647 d_Gconvert='gcvt((x),(n),(b))'
648 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
650 d_getcwd (d_getcwd.U):
651 This variable conditionally defines the HAS_GETCWD symbol, which
652 indicates to the C program that the getcwd() routine is available
653 to get the current working directory.
655 d_getespwnam (d_getespwnam.U):
656 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
657 available to retrieve enchanced (shadow) password entries by name.
659 d_getfsstat (d_getfsstat.U):
660 This variable conditionally defines the HAS_GETFSSTAT symbol, which
661 indicates to the C program that the getfsstat() routine is available.
663 d_getgrent (d_getgrent.U):
664 This variable conditionally defines the HAS_GETGRENT symbol, which
665 indicates to the C program that the getgrent() routine is available
666 for sequential access of the group database.
668 d_getgrps (d_getgrps.U):
669 This variable conditionally defines the HAS_GETGROUPS symbol, which
670 indicates to the C program that the getgroups() routine is available
671 to get the list of process groups.
673 d_gethbyaddr (d_gethbyad.U):
674 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
675 indicates to the C program that the gethostbyaddr() routine is available
676 to look up hosts by their IP addresses.
678 d_gethbyname (d_gethbynm.U):
679 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
680 indicates to the C program that the gethostbyname() routine is available
681 to look up host names in some data base or other.
683 d_gethent (d_gethent.U):
684 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
685 available to look up host names in some data base or another.
687 d_gethname (d_gethname.U):
688 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
689 indicates to the C program that the gethostname() routine may be
690 used to derive the host name.
692 d_gethostprotos (d_gethostprotos.U):
693 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
694 which indicates to the C program that <netdb.h> supplies
695 prototypes for the various gethost*() functions.
696 See also netdbtype.U for probing for various netdb types.
698 d_getitimer (d_getitimer.U):
699 This variable conditionally defines the HAS_GETITIMER symbol, which
700 indicates to the C program that the getitimer() routine is available.
702 d_getlogin (d_getlogin.U):
703 This variable conditionally defines the HAS_GETLOGIN symbol, which
704 indicates to the C program that the getlogin() routine is available
705 to get the login name.
707 d_getmnt (d_getmnt.U):
708 This variable conditionally defines the HAS_GETMNT symbol, which
709 indicates to the C program that the getmnt() routine is available
710 to retrieve one or more mount info blocks by filename.
712 d_getmntent (d_getmntent.U):
713 This variable conditionally defines the HAS_GETMNTENT symbol, which
714 indicates to the C program that the getmntent() routine is available
715 to iterate through mounted files to get their mount info.
717 d_getnbyaddr (d_getnbyad.U):
718 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
719 indicates to the C program that the getnetbyaddr() routine is available
720 to look up networks by their IP addresses.
722 d_getnbyname (d_getnbynm.U):
723 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
724 indicates to the C program that the getnetbyname() routine is available
725 to look up networks by their names.
727 d_getnent (d_getnent.U):
728 This variable conditionally defines HAS_GETNETENT if getnetent() is
729 available to look up network names in some data base or another.
731 d_getnetprotos (d_getnetprotos.U):
732 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
733 which indicates to the C program that <netdb.h> supplies
734 prototypes for the various getnet*() functions.
735 See also netdbtype.U for probing for various netdb types.
737 d_getpagsz (d_getpagsz.U):
738 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
739 is available to get the system page size.
741 d_getpbyname (d_getprotby.U):
742 This variable conditionally defines the HAS_GETPROTOBYNAME
743 symbol, which indicates to the C program that the
744 getprotobyname() routine is available to look up protocols
747 d_getpbynumber (d_getprotby.U):
748 This variable conditionally defines the HAS_GETPROTOBYNUMBER
749 symbol, which indicates to the C program that the
750 getprotobynumber() routine is available to look up protocols
753 d_getpent (d_getpent.U):
754 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
755 available to look up protocols in some data base or another.
757 d_getpgid (d_getpgid.U):
758 This variable conditionally defines the HAS_GETPGID symbol, which
759 indicates to the C program that the getpgid(pid) function
760 is available to get the process group id.
762 d_getpgrp2 (d_getpgrp2.U):
763 This variable conditionally defines the HAS_GETPGRP2 symbol, which
764 indicates to the C program that the getpgrp2() (as in DG/UX) routine
765 is available to get the current process group.
767 d_getpgrp (d_getpgrp.U):
768 This variable conditionally defines HAS_GETPGRP if getpgrp() is
769 available to get the current process group.
771 d_getppid (d_getppid.U):
772 This variable conditionally defines the HAS_GETPPID symbol, which
773 indicates to the C program that the getppid() routine is available
774 to get the parent process ID.
776 d_getprior (d_getprior.U):
777 This variable conditionally defines HAS_GETPRIORITY if getpriority()
778 is available to get a process's priority.
780 d_getprotoprotos (d_getprotoprotos.U):
781 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
782 which indicates to the C program that <netdb.h> supplies
783 prototypes for the various getproto*() functions.
784 See also netdbtype.U for probing for various netdb types.
786 d_getprpwnam (d_getprpwnam.U):
787 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
788 available to retrieve protected (shadow) password entries by name.
790 d_getpwent (d_getpwent.U):
791 This variable conditionally defines the HAS_GETPWENT symbol, which
792 indicates to the C program that the getpwent() routine is available
793 for sequential access of the passwd database.
795 d_getsbyname (d_getsrvby.U):
796 This variable conditionally defines the HAS_GETSERVBYNAME
797 symbol, which indicates to the C program that the
798 getservbyname() routine is available to look up services
801 d_getsbyport (d_getsrvby.U):
802 This variable conditionally defines the HAS_GETSERVBYPORT
803 symbol, which indicates to the C program that the
804 getservbyport() routine is available to look up services
807 d_getsent (d_getsent.U):
808 This variable conditionally defines HAS_GETSERVENT if getservent() is
809 available to look up network services in some data base or another.
811 d_getservprotos (d_getservprotos.U):
812 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
813 which indicates to the C program that <netdb.h> supplies
814 prototypes for the various getserv*() functions.
815 See also netdbtype.U for probing for various netdb types.
817 d_getspnam (d_getspnam.U):
818 This variable conditionally defines HAS_GETSPNAM if getspnam() is
819 available to retrieve SysV shadow password entries by name.
821 d_gettimeod (d_ftime.U):
822 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
823 indicates that the gettimeofday() system call exists (to obtain a
824 sub-second accuracy clock). You should probably include <sys/resource.h>.
826 d_gnulibc (d_gnulibc.U):
827 Defined if we're dealing with the GNU C Library.
829 d_grpasswd (i_grp.U):
830 This variable conditionally defines GRPASSWD, which indicates
831 that struct group in <grp.h> contains gr_passwd.
833 d_hasmntopt (d_hasmntopt.U):
834 This variable conditionally defines the HAS_HASMNTOPT symbol, which
835 indicates to the C program that the hasmntopt() routine is available
836 to query the mount options of file systems.
839 This variable conditionally defines HAS_HTONL if htonl() and its
840 friends are available to do network order byte swapping.
843 This variable conditionally defines the HAS_ICONV symbol, which
844 indicates to the C program that the iconv() routine is available.
846 d_index (d_strchr.U):
847 This variable conditionally defines HAS_INDEX if index() and
848 rindex() are available for string searching.
850 d_inetaton (d_inetaton.U):
851 This variable conditionally defines the HAS_INET_ATON symbol, which
852 indicates to the C program that the inet_aton() function is available
853 to parse IP address "dotted-quad" strings.
855 d_int64_t (d_int64_t.U):
856 This symbol will be defined if the C compiler supports int64_t.
858 d_isascii (d_isascii.U):
859 This variable conditionally defines the HAS_ISASCII constant,
860 which indicates to the C program that isascii() is available.
863 This variable conditionally defines the HAS_ISNAN symbol, which
864 indicates to the C program that the isnan() routine is available.
866 d_isnanl (d_isnanl.U):
867 This variable conditionally defines the HAS_ISNANL symbol, which
868 indicates to the C program that the isnanl() routine is available.
870 d_killpg (d_killpg.U):
871 This variable conditionally defines the HAS_KILLPG symbol, which
872 indicates to the C program that the killpg() routine is available
873 to kill process groups.
875 d_lchown (d_lchown.U):
876 This variable conditionally defines the HAS_LCHOWN symbol, which
877 indicates to the C program that the lchown() routine is available
878 to operate on a symbolic link (instead of following the link).
880 d_ldbl_dig (d_ldbl_dig.U):
881 This variable conditionally defines d_ldbl_dig if this system's
882 header files provide LDBL_DIG, which is the number of significant
883 digits in a long double precision number.
886 This variable conditionally defines HAS_LINK if link() is
887 available to create hard links.
889 d_locconv (d_locconv.U):
890 This variable conditionally defines HAS_LOCALECONV if localeconv() is
891 available for numeric and monetary formatting conventions.
894 This variable conditionally defines HAS_LOCKF if lockf() is
895 available to do file locking.
897 d_longdbl (d_longdbl.U):
898 This variable conditionally defines HAS_LONG_DOUBLE if
899 the long double type is supported.
901 d_longlong (d_longlong.U):
902 This variable conditionally defines HAS_LONG_LONG if
903 the long long type is supported.
905 d_lseekproto (d_lseekproto.U):
906 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
907 which indicates to the C program that the system provides
908 a prototype for the lseek() function. Otherwise, it is
909 up to the program to supply one.
912 This variable conditionally defines HAS_LSTAT if lstat() is
913 available to do file stats on symbolic links.
915 d_madvise (d_madvise.U):
916 This variable conditionally defines HAS_MADVISE if madvise() is
917 available to map a file into memory.
920 This variable conditionally defines the HAS_MBLEN symbol, which
921 indicates to the C program that the mblen() routine is available
922 to find the number of bytes in a multibye character.
924 d_mbstowcs (d_mbstowcs.U):
925 This variable conditionally defines the HAS_MBSTOWCS symbol, which
926 indicates to the C program that the mbstowcs() routine is available
927 to convert a multibyte string into a wide character string.
929 d_mbtowc (d_mbtowc.U):
930 This variable conditionally defines the HAS_MBTOWC symbol, which
931 indicates to the C program that the mbtowc() routine is available
932 to convert multibyte to a wide character.
934 d_memchr (d_memchr.U):
935 This variable conditionally defines the HAS_MEMCHR symbol, which
936 indicates to the C program that the memchr() routine is available
937 to locate characters within a C string.
939 d_memcmp (d_memcmp.U):
940 This variable conditionally defines the HAS_MEMCMP symbol, which
941 indicates to the C program that the memcmp() routine is available
942 to compare blocks of memory.
944 d_memcpy (d_memcpy.U):
945 This variable conditionally defines the HAS_MEMCPY symbol, which
946 indicates to the C program that the memcpy() routine is available
947 to copy blocks of memory.
949 d_memmove (d_memmove.U):
950 This variable conditionally defines the HAS_MEMMOVE symbol, which
951 indicates to the C program that the memmove() routine is available
952 to copy potentatially overlapping blocks of memory.
954 d_memset (d_memset.U):
955 This variable conditionally defines the HAS_MEMSET symbol, which
956 indicates to the C program that the memset() routine is available
957 to set blocks of memory.
960 This variable conditionally defines the HAS_MKDIR symbol, which
961 indicates to the C program that the mkdir() routine is available
962 to create directories..
964 d_mkdtemp (d_mkdtemp.U):
965 This variable conditionally defines the HAS_MKDTEMP symbol, which
966 indicates to the C program that the mkdtemp() routine is available
967 to exclusively create a uniquely named temporary directory.
969 d_mkfifo (d_mkfifo.U):
970 This variable conditionally defines the HAS_MKFIFO symbol, which
971 indicates to the C program that the mkfifo() routine is available.
973 d_mkstemp (d_mkstemp.U):
974 This variable conditionally defines the HAS_MKSTEMP symbol, which
975 indicates to the C program that the mkstemp() routine is available
976 to exclusively create and open a uniquely named temporary file.
978 d_mkstemps (d_mkstemps.U):
979 This variable conditionally defines the HAS_MKSTEMPS symbol, which
980 indicates to the C program that the mkstemps() routine is available
981 to exclusively create and open a uniquely named (with a suffix)
984 d_mktime (d_mktime.U):
985 This variable conditionally defines the HAS_MKTIME symbol, which
986 indicates to the C program that the mktime() routine is available.
989 This variable conditionally defines HAS_MMAP if mmap() is
990 available to map a file into memory.
993 This variable conditionally defines the HAS_MODFL symbol, which
994 indicates to the C program that the modfl() routine is available.
996 d_mprotect (d_mprotect.U):
997 This variable conditionally defines HAS_MPROTECT if mprotect() is
998 available to modify the access protection of a memory mapped file.
1001 This variable conditionally defines the HAS_MSG symbol, which
1002 indicates that the entire msg*(2) library is present.
1004 d_msg_ctrunc (d_socket.U):
1005 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1006 which indicates that the MSG_CTRUNC is available. #ifdef is
1007 not enough because it may be an enum, glibc has been known to do this.
1009 d_msg_dontroute (d_socket.U):
1010 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1011 which indicates that the MSG_DONTROUTE is available. #ifdef is
1012 not enough because it may be an enum, glibc has been known to do this.
1014 d_msg_oob (d_socket.U):
1015 This variable conditionally defines the HAS_MSG_OOB symbol,
1016 which indicates that the MSG_OOB is available. #ifdef is
1017 not enough because it may be an enum, glibc has been known to do this.
1019 d_msg_peek (d_socket.U):
1020 This variable conditionally defines the HAS_MSG_PEEK symbol,
1021 which indicates that the MSG_PEEK is available. #ifdef is
1022 not enough because it may be an enum, glibc has been known to do this.
1024 d_msg_proxy (d_socket.U):
1025 This variable conditionally defines the HAS_MSG_PROXY symbol,
1026 which indicates that the MSG_PROXY is available. #ifdef is
1027 not enough because it may be an enum, glibc has been known to do this.
1029 d_msgctl (d_msgctl.U):
1030 This variable conditionally defines the HAS_MSGCTL symbol, which
1031 indicates to the C program that the msgctl() routine is available.
1033 d_msgget (d_msgget.U):
1034 This variable conditionally defines the HAS_MSGGET symbol, which
1035 indicates to the C program that the msgget() routine is available.
1037 d_msghdr_s (d_msghdr_s.U):
1038 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1039 which indicates that the struct msghdr is supported.
1041 d_msgrcv (d_msgrcv.U):
1042 This variable conditionally defines the HAS_MSGRCV symbol, which
1043 indicates to the C program that the msgrcv() routine is available.
1045 d_msgsnd (d_msgsnd.U):
1046 This variable conditionally defines the HAS_MSGSND symbol, which
1047 indicates to the C program that the msgsnd() routine is available.
1049 d_msync (d_msync.U):
1050 This variable conditionally defines HAS_MSYNC if msync() is
1051 available to synchronize a mapped file.
1053 d_munmap (d_munmap.U):
1054 This variable conditionally defines HAS_MUNMAP if munmap() is
1055 available to unmap a region mapped by mmap().
1057 d_mymalloc (mallocsrc.U):
1058 This variable conditionally defines MYMALLOC in case other parts
1059 of the source want to take special action if MYMALLOC is used.
1060 This may include different sorts of profiling or error detection.
1063 This variable conditionally defines the HAS_NICE symbol, which
1064 indicates to the C program that the nice() routine is available.
1066 d_nv_preserves_uv (perlxv.U):
1067 This variable indicates whether a variable of type nvtype
1068 can preserve all the bits a variable of type uvtype.
1070 d_nv_preserves_uv_bits (perlxv.U):
1071 This variable indicates how many of bits type uvtype
1072 a variable nvtype can preserve.
1074 d_off64_t (d_off64_t.U):
1075 This symbol will be defined if the C compiler supports off64_t.
1077 d_old_pthread_create_joinable (d_pthrattrj.U):
1078 This variable conditionally defines pthread_create_joinable.
1079 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1081 d_oldpthreads (usethreads.U):
1082 This variable conditionally defines the OLD_PTHREADS_API symbol,
1083 and indicates that Perl should be built to use the old
1084 draft POSIX threads API. This is only potentially meaningful if
1087 d_oldsock (d_socket.U):
1088 This variable conditionally defines the OLDSOCKET symbol, which
1089 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1091 d_open3 (d_open3.U):
1092 This variable conditionally defines the HAS_OPEN3 manifest constant,
1093 which indicates to the C program that the 3 argument version of
1094 the open(2) function is available.
1096 d_pathconf (d_pathconf.U):
1097 This variable conditionally defines the HAS_PATHCONF symbol, which
1098 indicates to the C program that the pathconf() routine is available
1099 to determine file-system related limits and options associated
1100 with a given filename.
1102 d_pause (d_pause.U):
1103 This variable conditionally defines the HAS_PAUSE symbol, which
1104 indicates to the C program that the pause() routine is available
1105 to suspend a process until a signal is received.
1107 d_perl_otherlibdirs (otherlibdirs.U):
1108 This variable conditionally defines PERL_OTHERLIBDIRS, which
1109 contains a colon-separated set of paths for the perl binary to
1110 include in @INC. See also otherlibdirs.
1112 d_phostname (d_gethname.U):
1113 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1114 contains the shell command which, when fed to popen(), may be
1115 used to derive the host name.
1118 This variable conditionally defines the HAS_PIPE symbol, which
1119 indicates to the C program that the pipe() routine is available
1120 to create an inter-process channel.
1123 This variable conditionally defines the HAS_POLL symbol, which
1124 indicates to the C program that the poll() routine is available
1125 to poll active file descriptors.
1127 d_portable (d_portable.U):
1128 This variable conditionally defines the PORTABLE symbol, which
1129 indicates to the C program that it should not assume that it is
1130 running on the machine it was compiled on.
1132 d_PRId64 (quadfio.U):
1133 This variable conditionally defines the PERL_PRId64 symbol, which
1134 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1136 d_PRIeldbl (longdblfio.U):
1137 This variable conditionally defines the PERL_PRIfldbl symbol, which
1138 indiciates that stdio has a symbol to print long doubles.
1140 d_PRIEUldbl (longdblfio.U):
1141 This variable conditionally defines the PERL_PRIfldbl symbol, which
1142 indiciates that stdio has a symbol to print long doubles.
1143 The 'U' in the name is to separate this from d_PRIeldbl so that even
1144 case-blind systems can see the difference.
1146 d_PRIfldbl (longdblfio.U):
1147 This variable conditionally defines the PERL_PRIfldbl symbol, which
1148 indiciates that stdio has a symbol to print long doubles.
1150 d_PRIFUldbl (longdblfio.U):
1151 This variable conditionally defines the PERL_PRIfldbl symbol, which
1152 indiciates that stdio has a symbol to print long doubles.
1153 The 'U' in the name is to separate this from d_PRIfldbl so that even
1154 case-blind systems can see the difference.
1156 d_PRIgldbl (longdblfio.U):
1157 This variable conditionally defines the PERL_PRIfldbl symbol, which
1158 indiciates that stdio has a symbol to print long doubles.
1160 d_PRIGUldbl (longdblfio.U):
1161 This variable conditionally defines the PERL_PRIfldbl symbol, which
1162 indiciates that stdio has a symbol to print long doubles.
1163 The 'U' in the name is to separate this from d_PRIgldbl so that even
1164 case-blind systems can see the difference.
1166 d_PRIi64 (quadfio.U):
1167 This variable conditionally defines the PERL_PRIi64 symbol, which
1168 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1170 d_PRIo64 (quadfio.U):
1171 This variable conditionally defines the PERL_PRIo64 symbol, which
1172 indiciates that stdio has a symbol to print 64-bit octal numbers.
1174 d_PRIu64 (quadfio.U):
1175 This variable conditionally defines the PERL_PRIu64 symbol, which
1176 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1179 d_PRIx64 (quadfio.U):
1180 This variable conditionally defines the PERL_PRIx64 symbol, which
1181 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1183 d_PRIXU64 (quadfio.U):
1184 This variable conditionally defines the PERL_PRIXU64 symbol, which
1185 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1186 The 'U' in the name is to separate this from d_PRIx64 so that even
1187 case-blind systems can see the difference.
1189 d_pthread_yield (d_pthread_y.U):
1190 This variable conditionally defines the HAS_PTHREAD_YIELD
1191 symbol if the pthread_yield routine is available to yield
1192 the execution of the current thread.
1195 This variable conditionally defines PWAGE, which indicates
1196 that struct passwd contains pw_age.
1198 d_pwchange (i_pwd.U):
1199 This variable conditionally defines PWCHANGE, which indicates
1200 that struct passwd contains pw_change.
1202 d_pwclass (i_pwd.U):
1203 This variable conditionally defines PWCLASS, which indicates
1204 that struct passwd contains pw_class.
1206 d_pwcomment (i_pwd.U):
1207 This variable conditionally defines PWCOMMENT, which indicates
1208 that struct passwd contains pw_comment.
1210 d_pwexpire (i_pwd.U):
1211 This variable conditionally defines PWEXPIRE, which indicates
1212 that struct passwd contains pw_expire.
1214 d_pwgecos (i_pwd.U):
1215 This variable conditionally defines PWGECOS, which indicates
1216 that struct passwd contains pw_gecos.
1218 d_pwpasswd (i_pwd.U):
1219 This variable conditionally defines PWPASSWD, which indicates
1220 that struct passwd contains pw_passwd.
1222 d_pwquota (i_pwd.U):
1223 This variable conditionally defines PWQUOTA, which indicates
1224 that struct passwd contains pw_quota.
1226 d_qgcvt (d_qgcvt.U):
1227 This variable conditionally defines the HAS_QGCVT symbol, which
1228 indicates to the C program that the qgcvt() routine is available.
1230 d_quad (quadtype.U):
1231 This variable, if defined, tells that there's a 64-bit integer type,
1234 d_readdir (d_readdir.U):
1235 This variable conditionally defines HAS_READDIR if readdir() is
1236 available to read directory entries.
1238 d_readlink (d_readlink.U):
1239 This variable conditionally defines the HAS_READLINK symbol, which
1240 indicates to the C program that the readlink() routine is available
1241 to read the value of a symbolic link.
1243 d_readv (d_readv.U):
1244 This variable conditionally defines the HAS_READV symbol, which
1245 indicates to the C program that the readv() routine is available.
1247 d_realpath (d_realpath.U):
1248 This variable conditionally defines the HAS_REALPATH symbol, which
1249 indicates to the C program that the realpath() routine is available.
1251 d_recvmsg (d_recvmsg.U):
1252 This variable conditionally defines the HAS_RECVMSG symbol, which
1253 indicates to the C program that the recvmsg() routine is available.
1255 d_rename (d_rename.U):
1256 This variable conditionally defines the HAS_RENAME symbol, which
1257 indicates to the C program that the rename() routine is available
1260 d_rewinddir (d_readdir.U):
1261 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1264 d_rmdir (d_rmdir.U):
1265 This variable conditionally defines HAS_RMDIR if rmdir() is
1266 available to remove directories.
1268 d_safebcpy (d_safebcpy.U):
1269 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1270 the bcopy() routine can do overlapping copies.
1272 d_safemcpy (d_safemcpy.U):
1273 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1274 the memcpy() routine can do overlapping copies.
1276 d_sanemcmp (d_sanemcmp.U):
1277 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1278 the memcpy() routine is available and can be used to compare relative
1279 magnitudes of chars with their high bits set.
1281 d_sbrkproto (d_sbrkproto.U):
1282 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1283 which indicates to the C program that the system provides
1284 a prototype for the sbrk() function. Otherwise, it is
1285 up to the program to supply one.
1287 d_sched_yield (d_pthread_y.U):
1288 This variable conditionally defines the HAS_SCHED_YIELD
1289 symbol if the sched_yield routine is available to yield
1290 the execution of the current thread.
1292 d_scm_rights (d_socket.U):
1293 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1294 which indicates that the SCM_RIGHTS is available. #ifdef is
1295 not enough because it may be an enum, glibc has been known to do this.
1297 d_SCNfldbl (longdblfio.U):
1298 This variable conditionally defines the PERL_PRIfldbl symbol, which
1299 indiciates that stdio has a symbol to scan long doubles.
1301 d_seekdir (d_readdir.U):
1302 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1305 d_select (d_select.U):
1306 This variable conditionally defines HAS_SELECT if select() is
1307 available to select active file descriptors. A <sys/time.h>
1308 inclusion may be necessary for the timeout field.
1311 This variable conditionally defines the HAS_SEM symbol, which
1312 indicates that the entire sem*(2) library is present.
1314 d_semctl (d_semctl.U):
1315 This variable conditionally defines the HAS_SEMCTL symbol, which
1316 indicates to the C program that the semctl() routine is available.
1318 d_semctl_semid_ds (d_union_semun.U):
1319 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1320 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1322 d_semctl_semun (d_union_semun.U):
1323 This variable conditionally defines USE_SEMCTL_SEMUN, which
1324 indicates that union semun is to be used for semctl IPC_STAT.
1326 d_semget (d_semget.U):
1327 This variable conditionally defines the HAS_SEMGET symbol, which
1328 indicates to the C program that the semget() routine is available.
1330 d_semop (d_semop.U):
1331 This variable conditionally defines the HAS_SEMOP symbol, which
1332 indicates to the C program that the semop() routine is available.
1334 d_sendmsg (d_sendmsg.U):
1335 This variable conditionally defines the HAS_SENDMSG symbol, which
1336 indicates to the C program that the sendmsg() routine is available.
1338 d_setegid (d_setegid.U):
1339 This variable conditionally defines the HAS_SETEGID symbol, which
1340 indicates to the C program that the setegid() routine is available
1341 to change the effective gid of the current program.
1343 d_seteuid (d_seteuid.U):
1344 This variable conditionally defines the HAS_SETEUID symbol, which
1345 indicates to the C program that the seteuid() routine is available
1346 to change the effective uid of the current program.
1348 d_setgrent (d_setgrent.U):
1349 This variable conditionally defines the HAS_SETGRENT symbol, which
1350 indicates to the C program that the setgrent() routine is available
1351 for initializing sequential access to the group database.
1353 d_setgrps (d_setgrps.U):
1354 This variable conditionally defines the HAS_SETGROUPS symbol, which
1355 indicates to the C program that the setgroups() routine is available
1356 to set the list of process groups.
1358 d_sethent (d_sethent.U):
1359 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1362 d_setitimer (d_setitimer.U):
1363 This variable conditionally defines the HAS_SETITIMER symbol, which
1364 indicates to the C program that the setitimer() routine is available.
1366 d_setlinebuf (d_setlnbuf.U):
1367 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1368 indicates to the C program that the setlinebuf() routine is available
1369 to change stderr or stdout from block-buffered or unbuffered to a
1372 d_setlocale (d_setlocale.U):
1373 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1374 available to handle locale-specific ctype implementations.
1376 d_setnent (d_setnent.U):
1377 This variable conditionally defines HAS_SETNETENT if setnetent() is
1380 d_setpent (d_setpent.U):
1381 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1384 d_setpgid (d_setpgid.U):
1385 This variable conditionally defines the HAS_SETPGID symbol if the
1386 setpgid(pid, gpid) function is available to set process group ID.
1388 d_setpgrp2 (d_setpgrp2.U):
1389 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1390 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1391 is available to set the current process group.
1393 d_setpgrp (d_setpgrp.U):
1394 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1395 available to set the current process group.
1397 d_setprior (d_setprior.U):
1398 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1399 is available to set a process's priority.
1401 d_setproctitle (d_setproctitle.U):
1402 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1403 which indicates to the C program that the setproctitle() routine
1406 d_setpwent (d_setpwent.U):
1407 This variable conditionally defines the HAS_SETPWENT symbol, which
1408 indicates to the C program that the setpwent() routine is available
1409 for initializing sequential access to the passwd database.
1411 d_setregid (d_setregid.U):
1412 This variable conditionally defines HAS_SETREGID if setregid() is
1413 available to change the real and effective gid of the current
1416 d_setresgid (d_setregid.U):
1417 This variable conditionally defines HAS_SETRESGID if setresgid() is
1418 available to change the real, effective and saved gid of the current
1421 d_setresuid (d_setreuid.U):
1422 This variable conditionally defines HAS_SETREUID if setresuid() is
1423 available to change the real, effective and saved uid of the current
1426 d_setreuid (d_setreuid.U):
1427 This variable conditionally defines HAS_SETREUID if setreuid() is
1428 available to change the real and effective uid of the current
1431 d_setrgid (d_setrgid.U):
1432 This variable conditionally defines the HAS_SETRGID symbol, which
1433 indicates to the C program that the setrgid() routine is available
1434 to change the real gid of the current program.
1436 d_setruid (d_setruid.U):
1437 This variable conditionally defines the HAS_SETRUID symbol, which
1438 indicates to the C program that the setruid() routine is available
1439 to change the real uid of the current program.
1441 d_setsent (d_setsent.U):
1442 This variable conditionally defines HAS_SETSERVENT if setservent() is
1445 d_setsid (d_setsid.U):
1446 This variable conditionally defines HAS_SETSID if setsid() is
1447 available to set the process group ID.
1449 d_setvbuf (d_setvbuf.U):
1450 This variable conditionally defines the HAS_SETVBUF symbol, which
1451 indicates to the C program that the setvbuf() routine is available
1452 to change buffering on an open stdio stream.
1455 This variable conditionally defines the USE_SFIO symbol,
1456 and indicates whether sfio is available (and should be used).
1459 This variable conditionally defines the HAS_SHM symbol, which
1460 indicates that the entire shm*(2) library is present.
1462 d_shmat (d_shmat.U):
1463 This variable conditionally defines the HAS_SHMAT symbol, which
1464 indicates to the C program that the shmat() routine is available.
1466 d_shmatprototype (d_shmat.U):
1467 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1468 symbol, which indicates that sys/shm.h has a prototype for
1471 d_shmctl (d_shmctl.U):
1472 This variable conditionally defines the HAS_SHMCTL symbol, which
1473 indicates to the C program that the shmctl() routine is available.
1475 d_shmdt (d_shmdt.U):
1476 This variable conditionally defines the HAS_SHMDT symbol, which
1477 indicates to the C program that the shmdt() routine is available.
1479 d_shmget (d_shmget.U):
1480 This variable conditionally defines the HAS_SHMGET symbol, which
1481 indicates to the C program that the shmget() routine is available.
1483 d_sigaction (d_sigaction.U):
1484 This variable conditionally defines the HAS_SIGACTION symbol, which
1485 indicates that the Vr4 sigaction() routine is available.
1487 d_sigprocmask (d_sigprocmask.U):
1488 This variable conditionally defines HAS_SIGPROCMASK
1489 if sigprocmask() is available to examine or change the signal mask
1490 of the calling process.
1492 d_sigsetjmp (d_sigsetjmp.U):
1493 This variable conditionally defines the HAS_SIGSETJMP symbol,
1494 which indicates that the sigsetjmp() routine is available to
1495 call setjmp() and optionally save the process's signal mask.
1497 d_sockatmark (d_sockatmark.U):
1498 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1499 indicates to the C program that the sockatmark() routine is available.
1501 d_socket (d_socket.U):
1502 This variable conditionally defines HAS_SOCKET, which indicates
1503 that the BSD socket interface is supported.
1505 d_socklen_t (d_socklen_t.U):
1506 This symbol will be defined if the C compiler supports socklen_t.
1508 d_sockpair (d_socket.U):
1509 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1510 indicates that the BSD socketpair() is supported.
1512 d_socks5_init (d_socks5_init.U):
1513 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1514 indicates to the C program that the socks5_init() routine is available.
1516 d_sqrtl (d_sqrtl.U):
1517 This variable conditionally defines the HAS_SQRTL symbol, which
1518 indicates to the C program that the sqrtl() routine is available.
1520 d_sresgproto (d_sresgproto.U):
1521 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1522 which indicates to the C program that the system provides
1523 a prototype for the setresgid() function. Otherwise, it is
1524 up to the program to supply one.
1526 d_sresuproto (d_sresuproto.U):
1527 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1528 which indicates to the C program that the system provides
1529 a prototype for the setresuid() function. Otherwise, it is
1530 up to the program to supply one.
1532 d_statblks (d_statblks.U):
1533 This variable conditionally defines USE_STAT_BLOCKS
1534 if this system has a stat structure declaring
1535 st_blksize and st_blocks.
1537 d_statfs_f_flags (d_statfs_f_flags.U):
1538 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1539 symbol, which indicates to struct statfs from has f_flags member.
1540 This kind of struct statfs is coming from sys/mount.h (BSD),
1541 not from sys/statfs.h (SYSV).
1543 d_statfs_s (d_statfs_s.U):
1544 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1545 which indicates that the struct statfs is supported.
1547 d_statvfs (d_statvfs.U):
1548 This variable conditionally defines the HAS_STATVFS symbol, which
1549 indicates to the C program that the statvfs() routine is available.
1551 d_stdio_cnt_lval (d_stdstdio.U):
1552 This variable conditionally defines STDIO_CNT_LVALUE if the
1553 FILE_cnt macro can be used as an lvalue.
1555 d_stdio_ptr_lval (d_stdstdio.U):
1556 This variable conditionally defines STDIO_PTR_LVALUE if the
1557 FILE_ptr macro can be used as an lvalue.
1559 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1560 This symbol is defined if using the FILE_ptr macro as an lvalue
1561 to increase the pointer by n leaves File_cnt(fp) unchanged.
1563 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1564 This symbol is defined if using the FILE_ptr macro as an lvalue
1565 to increase the pointer by n has the side effect of decreasing the
1566 value of File_cnt(fp) by n.
1568 d_stdio_stream_array (stdio_streams.U):
1569 This variable tells whether there is an array holding
1572 d_stdiobase (d_stdstdio.U):
1573 This variable conditionally defines USE_STDIO_BASE if this system
1574 has a FILE structure declaring a usable _base field (or equivalent)
1577 d_stdstdio (d_stdstdio.U):
1578 This variable conditionally defines USE_STDIO_PTR if this system
1579 has a FILE structure declaring usable _ptr and _cnt fields (or
1580 equivalent) in stdio.h.
1582 d_strchr (d_strchr.U):
1583 This variable conditionally defines HAS_STRCHR if strchr() and
1584 strrchr() are available for string searching.
1586 d_strcoll (d_strcoll.U):
1587 This variable conditionally defines HAS_STRCOLL if strcoll() is
1588 available to compare strings using collating information.
1590 d_strctcpy (d_strctcpy.U):
1591 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1592 indicates to the C program that this C compiler knows how to copy
1595 d_strerrm (d_strerror.U):
1596 This variable holds what Strerrr is defined as to translate an error
1597 code condition into an error message string. It could be 'strerror'
1598 or a more complex macro emulating strrror with sys_errlist[], or the
1599 "unknown" string when both strerror and sys_errlist are missing.
1601 d_strerror (d_strerror.U):
1602 This variable conditionally defines HAS_STRERROR if strerror() is
1603 available to translate error numbers to strings.
1605 d_strftime (d_strftime.U):
1606 This variable conditionally defines the HAS_STRFTIME symbol, which
1607 indicates to the C program that the strftime() routine is available.
1609 d_strtod (d_strtod.U):
1610 This variable conditionally defines the HAS_STRTOD symbol, which
1611 indicates to the C program that the strtod() routine is available
1612 to provide better numeric string conversion than atof().
1614 d_strtol (d_strtol.U):
1615 This variable conditionally defines the HAS_STRTOL symbol, which
1616 indicates to the C program that the strtol() routine is available
1617 to provide better numeric string conversion than atoi() and friends.
1619 d_strtold (d_strtold.U):
1620 This variable conditionally defines the HAS_STRTOLD symbol, which
1621 indicates to the C program that the strtold() routine is available.
1623 d_strtoll (d_strtoll.U):
1624 This variable conditionally defines the HAS_STRTOLL symbol, which
1625 indicates to the C program that the strtoll() routine is available.
1627 d_strtoq (d_strtoq.U):
1628 This variable conditionally defines the HAS_STRTOQ symbol, which
1629 indicates to the C program that the strtoq() routine is available.
1631 d_strtoul (d_strtoul.U):
1632 This variable conditionally defines the HAS_STRTOUL symbol, which
1633 indicates to the C program that the strtoul() routine is available
1634 to provide conversion of strings to unsigned long.
1636 d_strtoull (d_strtoull.U):
1637 This variable conditionally defines the HAS_STRTOULL symbol, which
1638 indicates to the C program that the strtoull() routine is available.
1640 d_strtouq (d_strtouq.U):
1641 This variable conditionally defines the HAS_STRTOUQ symbol, which
1642 indicates to the C program that the strtouq() routine is available.
1644 d_strxfrm (d_strxfrm.U):
1645 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1646 available to transform strings.
1648 d_suidsafe (d_dosuid.U):
1649 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1650 if setuid scripts can be secure. This test looks in /dev/fd/.
1652 d_symlink (d_symlink.U):
1653 This variable conditionally defines the HAS_SYMLINK symbol, which
1654 indicates to the C program that the symlink() routine is available
1655 to create symbolic links.
1657 d_syscall (d_syscall.U):
1658 This variable conditionally defines HAS_SYSCALL if syscall() is
1659 available call arbitrary system calls.
1661 d_sysconf (d_sysconf.U):
1662 This variable conditionally defines the HAS_SYSCONF symbol, which
1663 indicates to the C program that the sysconf() routine is available
1664 to determine system related limits and options.
1666 d_sysernlst (d_strerror.U):
1667 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1668 is available to translate error numbers to the symbolic name.
1670 d_syserrlst (d_strerror.U):
1671 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1672 available to translate error numbers to strings.
1674 d_system (d_system.U):
1675 This variable conditionally defines HAS_SYSTEM if system() is
1676 available to issue a shell command.
1678 d_tcgetpgrp (d_tcgtpgrp.U):
1679 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1680 indicates to the C program that the tcgetpgrp() routine is available.
1681 to get foreground process group ID.
1683 d_tcsetpgrp (d_tcstpgrp.U):
1684 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1685 indicates to the C program that the tcsetpgrp() routine is available
1686 to set foreground process group ID.
1688 d_telldir (d_readdir.U):
1689 This variable conditionally defines HAS_TELLDIR if telldir() is
1692 d_telldirproto (d_telldirproto.U):
1693 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1694 which indicates to the C program that the system provides
1695 a prototype for the telldir() function. Otherwise, it is
1696 up to the program to supply one.
1699 This variable conditionally defines the HAS_TIME symbol, which indicates
1700 that the time() routine exists. The time() routine is normaly
1701 provided on UNIX systems.
1703 d_times (d_times.U):
1704 This variable conditionally defines the HAS_TIMES symbol, which indicates
1705 that the times() routine exists. The times() routine is normaly
1706 provided on UNIX systems. You may have to include <sys/times.h>.
1708 d_truncate (d_truncate.U):
1709 This variable conditionally defines HAS_TRUNCATE if truncate() is
1710 available to truncate files.
1712 d_tzname (d_tzname.U):
1713 This variable conditionally defines HAS_TZNAME if tzname[] is
1714 available to access timezone names.
1716 d_u32align (d_u32align.U):
1717 This variable tells whether you must access character data
1718 through U32-aligned pointers.
1720 d_ualarm (d_ualarm.U):
1721 This variable conditionally defines the HAS_UALARM symbol, which
1722 indicates to the C program that the ualarm() routine is available.
1724 d_umask (d_umask.U):
1725 This variable conditionally defines the HAS_UMASK symbol, which
1726 indicates to the C program that the umask() routine is available.
1727 to set and get the value of the file creation mask.
1729 d_uname (d_gethname.U):
1730 This variable conditionally defines the HAS_UNAME symbol, which
1731 indicates to the C program that the uname() routine may be
1732 used to derive the host name.
1734 d_union_semun (d_union_semun.U):
1735 This variable conditionally defines HAS_UNION_SEMUN if the
1736 union semun is defined by including <sys/sem.h>.
1738 d_usleep (d_usleep.U):
1739 This variable conditionally defines HAS_USLEEP if usleep() is
1740 available to do high granularity sleeps.
1742 d_ustat (d_ustat.U):
1743 This variable conditionally defines HAS_USTAT if ustat() is
1744 available to query file system statistics by dev_t.
1746 d_vendorarch (vendorarch.U):
1747 This variable conditionally defined PERL_VENDORARCH.
1749 d_vendorbin (vendorbin.U):
1750 This variable conditionally defines PERL_VENDORBIN.
1752 d_vendorlib (vendorlib.U):
1753 This variable conditionally defines PERL_VENDORLIB.
1755 d_vfork (d_vfork.U):
1756 This variable conditionally defines the HAS_VFORK symbol, which
1757 indicates the vfork() routine is available.
1759 d_void_closedir (d_closedir.U):
1760 This variable conditionally defines VOID_CLOSEDIR if closedir()
1761 does not return a value.
1763 d_voidsig (d_voidsig.U):
1764 This variable conditionally defines VOIDSIG if this system
1765 declares "void (*signal(...))()" in signal.h. The old way was to
1766 declare it as "int (*signal(...))()".
1768 d_voidtty (i_sysioctl.U):
1769 This variable conditionally defines USE_IOCNOTTY to indicate that the
1770 ioctl() call with TIOCNOTTY should be used to void tty association.
1771 Otherwise (on USG probably), it is enough to close the standard file
1772 decriptors and do a setpgrp().
1774 d_volatile (d_volatile.U):
1775 This variable conditionally defines the HASVOLATILE symbol, which
1776 indicates to the C program that this C compiler knows about the
1777 volatile declaration.
1779 d_vprintf (d_vprintf.U):
1780 This variable conditionally defines the HAS_VPRINTF symbol, which
1781 indicates to the C program that the vprintf() routine is available
1782 to printf with a pointer to an argument list.
1784 d_wait4 (d_wait4.U):
1785 This variable conditionally defines the HAS_WAIT4 symbol, which
1786 indicates the wait4() routine is available.
1788 d_waitpid (d_waitpid.U):
1789 This variable conditionally defines HAS_WAITPID if waitpid() is
1790 available to wait for child process.
1792 d_wcstombs (d_wcstombs.U):
1793 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1794 indicates to the C program that the wcstombs() routine is available
1795 to convert wide character strings to multibyte strings.
1797 d_wctomb (d_wctomb.U):
1798 This variable conditionally defines the HAS_WCTOMB symbol, which
1799 indicates to the C program that the wctomb() routine is available
1800 to convert a wide character to a multibyte.
1802 d_writev (d_writev.U):
1803 This variable conditionally defines the HAS_WRITEV symbol, which
1804 indicates to the C program that the writev() routine is available.
1807 This variable conditionally defines the symbol XENIX, which alerts
1808 the C program that it runs under Xenix.
1811 This variable is used internally by Configure to determine the
1812 full pathname (if any) of the date program. After Configure runs,
1813 the value is reset to a plain "date" and is not useful.
1815 db_hashtype (i_db.U):
1816 This variable contains the type of the hash structure element
1817 in the <db.h> header file. In older versions of DB, it was
1818 int, while in newer ones it is u_int32_t.
1820 db_prefixtype (i_db.U):
1821 This variable contains the type of the prefix structure element
1822 in the <db.h> header file. In older versions of DB, it was
1823 int, while in newer ones it is size_t.
1825 db_version_major (i_db.U):
1826 This variable contains the major version number of
1827 Berkeley DB found in the <db.h> header file.
1829 db_version_minor (i_db.U):
1830 This variable contains the minor version number of
1831 Berkeley DB found in the <db.h> header file.
1832 For DB version 1 this is always 0.
1834 db_version_patch (i_db.U):
1835 This variable contains the patch version number of
1836 Berkeley DB found in the <db.h> header file.
1837 For DB version 1 this is always 0.
1839 defvoidused (voidflags.U):
1840 This variable contains the default value of the VOIDUSED symbol (15).
1842 direntrytype (i_dirent.U):
1843 This symbol is set to 'struct direct' or 'struct dirent' depending on
1844 whether dirent is available or not. You should use this pseudo type to
1845 portably declare your directory entries.
1848 This variable contains the extension that is to be used for the
1849 dynamically loaded modules that perl generaties.
1852 This variable contains the name of the dynamic loading file that
1853 will be used with the package.
1855 doublesize (doublesize.U):
1856 This variable contains the value of the DOUBLESIZE symbol, which
1857 indicates to the C program how many bytes there are in a double.
1859 drand01 (randfunc.U):
1860 Indicates the macro to be used to generate normalized
1861 random numbers. Uses randfunc, often divided by
1862 (double) (((unsigned long) 1 << randbits)) in order to
1863 normalize the result.
1864 In C programs, the macro 'Drand01' is mapped to drand01.
1866 dynamic_ext (Extensions.U):
1867 This variable holds a list of XS extension files we want to
1868 link dynamically into the package. It is used by Makefile.
1870 eagain (nblock_io.U):
1871 This variable bears the symbolic errno code set by read() when no
1872 data is present on the file and non-blocking I/O was enabled (otherwise,
1873 read() blocks naturally).
1876 This variable conditionally defines EBCDIC if this
1877 system uses EBCDIC encoding. Among other things, this
1878 means that the character ranges are not contiguous.
1882 This variable is used internally by Configure to determine the
1883 full pathname (if any) of the echo program. After Configure runs,
1884 the value is reset to a plain "echo" and is not useful.
1887 This variable is used internally by Configure to determine the
1888 full pathname (if any) of the egrep program. After Configure runs,
1889 the value is reset to a plain "egrep" and is not useful.
1892 This variable is defined but not used by Configure.
1893 The value is a plain '' and is not useful.
1896 When running under Eunice this variable contains a command which will
1897 convert a shell script to the proper form of text file for it to be
1898 executable by the shell. On other systems it is a no-op.
1901 This is an old synonym for _exe.
1904 This variable is used internally by Configure to determine the
1905 full pathname (if any) of the expr program. After Configure runs,
1906 the value is reset to a plain "expr" and is not useful.
1908 extensions (Extensions.U):
1909 This variable holds a list of all extension files (both XS and
1910 non-xs linked into the package. It is propagated to Config.pm
1911 and is typically used to test whether a particular extesion
1914 fflushall (fflushall.U):
1915 This symbol, if defined, tells that to flush
1916 all pending stdio output one must loop through all
1917 the stdio file handles stored in an array and fflush them.
1918 Note that if fflushNULL is defined, fflushall will not
1919 even be probed for and will be left undefined.
1921 fflushNULL (fflushall.U):
1922 This symbol, if defined, tells that fflush(NULL) does flush
1923 all pending stdio output.
1926 This variable is defined but not used by Configure.
1927 The value is a plain '' and is not useful.
1929 firstmakefile (Unix.U):
1930 This variable defines the first file searched by make. On unix,
1931 it is makefile (then Makefile). On case-insensitive systems,
1932 it might be something else. This is only used to deal with
1933 convoluted make depend tricks.
1936 This variable is defined but not used by Configure.
1937 The value is a plain '' and is not useful.
1939 fpossize (fpossize.U):
1940 This variable contains the size of a fpostype in bytes.
1942 fpostype (fpostype.U):
1943 This variable defines Fpos_t to be something like fpos_t, long,
1944 uint, or whatever type is used to declare file positions in libc.
1946 freetype (mallocsrc.U):
1947 This variable contains the return type of free(). It is usually
1948 void, but occasionally int.
1951 This variable contains the full pathname to 'ar', whether or
1952 not the user has specified 'portability'. This is only used
1956 This variable contains the full pathname to 'csh', whether or
1957 not the user has specified 'portability'. This is only used
1958 in the compiled C program, and we assume that all systems which
1959 can share this executable will have the same full pathname to
1962 full_sed (Loc_sed.U):
1963 This variable contains the full pathname to 'sed', whether or
1964 not the user has specified 'portability'. This is only used
1965 in the compiled C program, and we assume that all systems which
1966 can share this executable will have the same full pathname to
1969 gccosandvers (gccvers.U):
1970 If GNU cc (gcc) is used, this variable the operating system and
1971 version used to compile the gcc. It is set to '' if not gcc,
1972 or if nothing useful can be parsed as the os version.
1974 gccversion (gccvers.U):
1975 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1976 indicate whether the compiler is version 1 or 2. This is used in
1977 setting some of the default cflags. It is set to '' if not gcc.
1980 This variable contains the format string used for printing a Gid_t.
1982 gidsign (gidsign.U):
1983 This variable contains the signedness of a gidtype.
1984 1 for unsigned, -1 for signed.
1986 gidsize (gidsize.U):
1987 This variable contains the size of a gidtype in bytes.
1989 gidtype (gidtype.U):
1990 This variable defines Gid_t to be something like gid_t, int,
1991 ushort, or whatever type is used to declare the return type
1992 of getgid(). Typically, it is the type of group ids in the kernel.
1995 This variable holds the general path (space-separated) used to
1996 find libraries. It may contain directories that do not exist on
1997 this platform, libpth is the cleaned-up version.
2000 This variable is used internally by Configure to determine the
2001 full pathname (if any) of the grep program. After Configure runs,
2002 the value is reset to a plain "grep" and is not useful.
2005 This variable contains a command that produces the text of the
2006 /etc/group file. This is normally "cat /etc/group", but can be
2007 "ypcat group" when NIS is used.
2008 On some systems, such as os390, there may be no equivalent
2009 command, in which case this variable is unset.
2011 groupstype (groupstype.U):
2012 This variable defines Groups_t to be something like gid_t, int,
2013 ushort, or whatever type is used for the second argument to
2014 getgroups() and setgroups(). Usually, this is the same as
2015 gidtype (gid_t), but sometimes it isn't.
2018 This variable is used internally by Configure to determine the
2019 full pathname (if any) of the gzip program. After Configure runs,
2020 the value is reset to a plain "gzip" and is not useful.
2022 h_fcntl (h_fcntl.U):
2023 This is variable gets set in various places to tell i_fcntl that
2024 <fcntl.h> should be included.
2026 h_sysfile (h_sysfile.U):
2027 This is variable gets set in various places to tell i_sys_file that
2028 <sys/file.h> should be included.
2031 Gives the type of hints used for previous answers. May be one of
2032 "default", "recommended" or "previous".
2035 This variable contains a command that produces the text of the
2036 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2037 "ypcat hosts" when NIS is used.
2038 On some systems, such as os390, there may be no equivalent
2039 command, in which case this variable is unset.
2042 This variable is the size of an I16 in bytes.
2045 This variable contains the C type used for Perl's I16.
2048 This variable is the size of an I32 in bytes.
2051 This variable contains the C type used for Perl's I32.
2054 This variable is the size of an I64 in bytes.
2057 This variable contains the C type used for Perl's I64.
2060 This variable is the size of an I8 in bytes.
2063 This variable contains the C type used for Perl's I8.
2065 i_arpainet (i_arpainet.U):
2066 This variable conditionally defines the I_ARPA_INET symbol,
2067 and indicates whether a C program should include <arpa/inet.h>.
2069 i_bsdioctl (i_sysioctl.U):
2070 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2071 indicates to the C program that <sys/bsdioctl.h> exists and should
2075 This variable conditionally defines the I_DB symbol, and indicates
2076 whether a C program may include Berkeley's DB include file <db.h>.
2079 This variable conditionally defines the I_DBM symbol, which
2080 indicates to the C program that <dbm.h> exists and should
2083 i_dirent (i_dirent.U):
2084 This variable conditionally defines I_DIRENT, which indicates
2085 to the C program that it should include <dirent.h>.
2088 This variable conditionally defines the I_DLD symbol, which
2089 indicates to the C program that <dld.h> (GNU dynamic loading)
2090 exists and should be included.
2092 i_dlfcn (i_dlfcn.U):
2093 This variable conditionally defines the I_DLFCN symbol, which
2094 indicates to the C program that <dlfcn.h> exists and should
2097 i_fcntl (i_fcntl.U):
2098 This variable controls the value of I_FCNTL (which tells
2099 the C program to include <fcntl.h>).
2101 i_float (i_float.U):
2102 This variable conditionally defines the I_FLOAT symbol, and indicates
2103 whether a C program may include <float.h> to get symbols like DBL_MAX
2104 or DBL_MIN, i.e. machine dependent floating point values.
2107 This variable conditionally defines the I_GDBM symbol, which
2108 indicates to the C program that <gdbm.h> exists and should
2112 This variable conditionally defines the I_GRP symbol, and indicates
2113 whether a C program should include <grp.h>.
2115 i_iconv (i_iconv.U):
2116 This variable conditionally defines the I_ICONV symbol, and indicates
2117 whether a C program should include <iconv.h>.
2119 i_ieeefp (i_ieeefp.U):
2120 This variable conditionally defines the I_IEEEFP symbol, and indicates
2121 whether a C program should include <ieeefp.h>.
2123 i_inttypes (i_inttypes.U):
2124 This variable conditionally defines the I_INTTYPES symbol,
2125 and indicates whether a C program should include <inttypes.h>.
2127 i_libutil (i_libutil.U):
2128 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2129 whether a C program should include <libutil.h>.
2131 i_limits (i_limits.U):
2132 This variable conditionally defines the I_LIMITS symbol, and indicates
2133 whether a C program may include <limits.h> to get symbols like WORD_BIT
2136 i_locale (i_locale.U):
2137 This variable conditionally defines the I_LOCALE symbol,
2138 and indicates whether a C program should include <locale.h>.
2140 i_machcthr (i_machcthr.U):
2141 This variable conditionally defines the I_MACH_CTHREADS symbol,
2142 and indicates whether a C program should include <mach/cthreads.h>.
2144 i_malloc (i_malloc.U):
2145 This variable conditionally defines the I_MALLOC symbol, and indicates
2146 whether a C program should include <malloc.h>.
2149 This variable conditionally defines the I_MATH symbol, and indicates
2150 whether a C program may include <math.h>.
2152 i_memory (i_memory.U):
2153 This variable conditionally defines the I_MEMORY symbol, and indicates
2154 whether a C program should include <memory.h>.
2156 i_mntent (i_mntent.U):
2157 This variable conditionally defines the I_MNTENT symbol, and indicates
2158 whether a C program should include <mntent.h>.
2161 This variable conditionally defines the I_NDBM symbol, which
2162 indicates to the C program that <ndbm.h> exists and should
2165 i_netdb (i_netdb.U):
2166 This variable conditionally defines the I_NETDB symbol, and indicates
2167 whether a C program should include <netdb.h>.
2169 i_neterrno (i_neterrno.U):
2170 This variable conditionally defines the I_NET_ERRNO symbol, which
2171 indicates to the C program that <net/errno.h> exists and should
2174 i_netinettcp (i_netinettcp.U):
2175 This variable conditionally defines the I_NETINET_TCP symbol,
2176 and indicates whether a C program should include <netinet/tcp.h>.
2179 This variable conditionally defines I_NETINET_IN, which indicates
2180 to the C program that it should include <netinet/in.h>. Otherwise,
2181 you may try <sys/in.h>.
2184 This variable conditionally defines the I_POLL symbol, and indicates
2185 whether a C program should include <poll.h>.
2188 This variable conditionally defines the I_PROT symbol, and indicates
2189 whether a C program should include <prot.h>.
2191 i_pthread (i_pthread.U):
2192 This variable conditionally defines the I_PTHREAD symbol,
2193 and indicates whether a C program should include <pthread.h>.
2196 This variable conditionally defines I_PWD, which indicates
2197 to the C program that it should include <pwd.h>.
2199 i_rpcsvcdbm (i_dbm.U):
2200 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2201 indicates to the C program that <rpcsvc/dbm.h> exists and should
2202 be included. Some System V systems might need this instead of <dbm.h>.
2205 This variable conditionally defines the I_SFIO symbol,
2206 and indicates whether a C program should include <sfio.h>.
2208 i_sgtty (i_termio.U):
2209 This variable conditionally defines the I_SGTTY symbol, which
2210 indicates to the C program that it should include <sgtty.h> rather
2213 i_shadow (i_shadow.U):
2214 This variable conditionally defines the I_SHADOW symbol, and indicates
2215 whether a C program should include <shadow.h>.
2217 i_socks (i_socks.U):
2218 This variable conditionally defines the I_SOCKS symbol, and indicates
2219 whether a C program should include <socks.h>.
2221 i_stdarg (i_varhdr.U):
2222 This variable conditionally defines the I_STDARG symbol, which
2223 indicates to the C program that <stdarg.h> exists and should
2226 i_stddef (i_stddef.U):
2227 This variable conditionally defines the I_STDDEF symbol, which
2228 indicates to the C program that <stddef.h> exists and should
2231 i_stdlib (i_stdlib.U):
2232 This variable conditionally defines the I_STDLIB symbol, which
2233 indicates to the C program that <stdlib.h> exists and should
2236 i_string (i_string.U):
2237 This variable conditionally defines the I_STRING symbol, which
2238 indicates that <string.h> should be included rather than <strings.h>.
2240 i_sunmath (i_sunmath.U):
2241 This variable conditionally defines the I_SUNMATH symbol, and indicates
2242 whether a C program should include <sunmath.h>.
2244 i_sysaccess (i_sysaccess.U):
2245 This variable conditionally defines the I_SYS_ACCESS symbol,
2246 and indicates whether a C program should include <sys/access.h>.
2248 i_sysdir (i_sysdir.U):
2249 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2250 whether a C program should include <sys/dir.h>.
2252 i_sysfile (i_sysfile.U):
2253 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2254 whether a C program should include <sys/file.h> to get R_OK and friends.
2256 i_sysfilio (i_sysioctl.U):
2257 This variable conditionally defines the I_SYS_FILIO symbol, which
2258 indicates to the C program that <sys/filio.h> exists and should
2259 be included in preference to <sys/ioctl.h>.
2262 This variable conditionally defines I_SYS_IN, which indicates
2263 to the C program that it should include <sys/in.h> instead of
2266 i_sysioctl (i_sysioctl.U):
2267 This variable conditionally defines the I_SYS_IOCTL symbol, which
2268 indicates to the C program that <sys/ioctl.h> exists and should
2271 i_syslog (i_syslog.U):
2272 This variable conditionally defines the I_SYSLOG symbol,
2273 and indicates whether a C program should include <syslog.h>.
2275 i_sysmman (i_sysmman.U):
2276 This variable conditionally defines the I_SYS_MMAN symbol, and
2277 indicates whether a C program should include <sys/mman.h>.
2279 i_sysmode (i_sysmode.U):
2280 This variable conditionally defines the I_SYSMODE symbol,
2281 and indicates whether a C program should include <sys/mode.h>.
2283 i_sysmount (i_sysmount.U):
2284 This variable conditionally defines the I_SYSMOUNT symbol,
2285 and indicates whether a C program should include <sys/mount.h>.
2287 i_sysndir (i_sysndir.U):
2288 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2289 whether a C program should include <sys/ndir.h>.
2291 i_sysparam (i_sysparam.U):
2292 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2293 whether a C program should include <sys/param.h>.
2295 i_sysresrc (i_sysresrc.U):
2296 This variable conditionally defines the I_SYS_RESOURCE symbol,
2297 and indicates whether a C program should include <sys/resource.h>.
2299 i_syssecrt (i_syssecrt.U):
2300 This variable conditionally defines the I_SYS_SECURITY symbol,
2301 and indicates whether a C program should include <sys/security.h>.
2303 i_sysselct (i_sysselct.U):
2304 This variable conditionally defines I_SYS_SELECT, which indicates
2305 to the C program that it should include <sys/select.h> in order to
2306 get the definition of struct timeval.
2308 i_syssockio (i_sysioctl.U):
2309 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2310 C program that socket ioctl codes may be found in <sys/sockio.h>
2311 instead of <sys/ioctl.h>.
2313 i_sysstat (i_sysstat.U):
2314 This variable conditionally defines the I_SYS_STAT symbol,
2315 and indicates whether a C program should include <sys/stat.h>.
2317 i_sysstatfs (i_sysstatfs.U):
2318 This variable conditionally defines the I_SYSSTATFS symbol,
2319 and indicates whether a C program should include <sys/statfs.h>.
2321 i_sysstatvfs (i_sysstatvfs.U):
2322 This variable conditionally defines the I_SYSSTATVFS symbol,
2323 and indicates whether a C program should include <sys/statvfs.h>.
2325 i_systime (i_time.U):
2326 This variable conditionally defines I_SYS_TIME, which indicates
2327 to the C program that it should include <sys/time.h>.
2329 i_systimek (i_time.U):
2330 This variable conditionally defines I_SYS_TIME_KERNEL, which
2331 indicates to the C program that it should include <sys/time.h>
2332 with KERNEL defined.
2334 i_systimes (i_systimes.U):
2335 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2336 whether a C program should include <sys/times.h>.
2338 i_systypes (i_systypes.U):
2339 This variable conditionally defines the I_SYS_TYPES symbol,
2340 and indicates whether a C program should include <sys/types.h>.
2342 i_sysuio (i_sysuio.U):
2343 This variable conditionally defines the I_SYSUIO symbol, and indicates
2344 whether a C program should include <sys/uio.h>.
2346 i_sysun (i_sysun.U):
2347 This variable conditionally defines I_SYS_UN, which indicates
2348 to the C program that it should include <sys/un.h> to get UNIX
2349 domain socket definitions.
2351 i_sysutsname (i_sysutsname.U):
2352 This variable conditionally defines the I_SYSUTSNAME symbol,
2353 and indicates whether a C program should include <sys/utsname.h>.
2355 i_sysvfs (i_sysvfs.U):
2356 This variable conditionally defines the I_SYSVFS symbol,
2357 and indicates whether a C program should include <sys/vfs.h>.
2359 i_syswait (i_syswait.U):
2360 This variable conditionally defines I_SYS_WAIT, which indicates
2361 to the C program that it should include <sys/wait.h>.
2363 i_termio (i_termio.U):
2364 This variable conditionally defines the I_TERMIO symbol, which
2365 indicates to the C program that it should include <termio.h> rather
2368 i_termios (i_termio.U):
2369 This variable conditionally defines the I_TERMIOS symbol, which
2370 indicates to the C program that the POSIX <termios.h> file is
2374 This variable conditionally defines I_TIME, which indicates
2375 to the C program that it should include <time.h>.
2377 i_unistd (i_unistd.U):
2378 This variable conditionally defines the I_UNISTD symbol, and indicates
2379 whether a C program should include <unistd.h>.
2381 i_ustat (i_ustat.U):
2382 This variable conditionally defines the I_USTAT symbol, and indicates
2383 whether a C program should include <ustat.h>.
2385 i_utime (i_utime.U):
2386 This variable conditionally defines the I_UTIME symbol, and indicates
2387 whether a C program should include <utime.h>.
2389 i_values (i_values.U):
2390 This variable conditionally defines the I_VALUES symbol, and indicates
2391 whether a C program may include <values.h> to get symbols like MAXLONG
2394 i_varargs (i_varhdr.U):
2395 This variable conditionally defines I_VARARGS, which indicates
2396 to the C program that it should include <varargs.h>.
2398 i_varhdr (i_varhdr.U):
2399 Contains the name of the header to be included to get va_dcl definition.
2400 Typically one of varargs.h or stdarg.h.
2402 i_vfork (i_vfork.U):
2403 This variable conditionally defines the I_VFORK symbol, and indicates
2404 whether a C program should include vfork.h.
2406 ignore_versioned_solibs (libs.U):
2407 This variable should be non-empty if non-versioned shared
2408 libraries (libfoo.so.x.y) are to be ignored (because they
2409 cannot be linked against).
2411 inc_version_list (inc_version_list.U):
2412 This variable specifies the list of subdirectories in over
2413 which perl.c:incpush() and lib/lib.pm will automatically
2414 search when adding directories to @INC. The elements in
2415 the list are separated by spaces. This is only useful
2416 if you have a perl library directory tree structured like the
2417 default one. See INSTALL for how this works. The versioned
2418 site_perl directory was introduced in 5.005, so that is the
2419 lowest possible value.
2421 inc_version_list_init (inc_version_list.U):
2422 This variable holds the same list as inc_version_list, but
2423 each item is enclosed in double quotes and separated by commas,
2424 suitable for use in the PERL_INC_VERSION_LIST initialization.
2427 This variable must preceed the normal include path to get hte
2428 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2429 Value can be "" or "/bsd43" on mips.
2432 This variable is defined but not used by Configure.
2433 The value is a plain '' and is not useful.
2435 installarchlib (archlib.U):
2436 This variable is really the same as archlibexp but may differ on
2437 those systems using AFS. For extra portability, only this variable
2438 should be used in makefiles.
2441 This variable is the same as binexp unless AFS is running in which case
2442 the user is explicitely prompted for it. This variable should always
2443 be used in your makefiles for maximum portability.
2445 installman1dir (man1dir.U):
2446 This variable is really the same as man1direxp, unless you are using
2447 AFS in which case it points to the read/write location whereas
2448 man1direxp only points to the read-only access location. For extra
2449 portability, you should only use this variable within your makefiles.
2451 installman3dir (man3dir.U):
2452 This variable is really the same as man3direxp, unless you are using
2453 AFS in which case it points to the read/write location whereas
2454 man3direxp only points to the read-only access location. For extra
2455 portability, you should only use this variable within your makefiles.
2457 installprefix (installprefix.U):
2458 This variable holds the name of the directory below which
2459 "make install" will install the package. For most users, this
2460 is the same as prefix. However, it is useful for
2461 installing the software into a different (usually temporary)
2462 location after which it can be bundled up and moved somehow
2463 to the final location specified by prefix.
2465 installprefixexp (installprefix.U):
2466 This variable holds the full absolute path of installprefix
2467 with all ~-expansion done.
2469 installprivlib (privlib.U):
2470 This variable is really the same as privlibexp but may differ on
2471 those systems using AFS. For extra portability, only this variable
2472 should be used in makefiles.
2474 installscript (scriptdir.U):
2475 This variable is usually the same as scriptdirexp, unless you are on
2476 a system running AFS, in which case they may differ slightly. You
2477 should always use this variable within your makefiles for portability.
2479 installsitearch (sitearch.U):
2480 This variable is really the same as sitearchexp but may differ on
2481 those systems using AFS. For extra portability, only this variable
2482 should be used in makefiles.
2484 installsitebin (sitebin.U):
2485 This variable is usually the same as sitebinexp, unless you are on
2486 a system running AFS, in which case they may differ slightly. You
2487 should always use this variable within your makefiles for portability.
2489 installsitelib (sitelib.U):
2490 This variable is really the same as sitelibexp but may differ on
2491 those systems using AFS. For extra portability, only this variable
2492 should be used in makefiles.
2494 installstyle (installstyle.U):
2495 This variable describes the "style" of the perl installation.
2496 This is intended to be useful for tools that need to
2497 manipulate entire perl distributions. Perl itself doesn't use
2498 this to find its libraries -- the library directories are
2499 stored directly in Config.pm. Currently, there are only two
2500 styles: "lib" and "lib/perl5". The default library locations
2501 (e.g. privlib, sitelib) are either $prefix/lib or
2502 $prefix/lib/perl5. The former is useful if $prefix is a
2503 directory dedicated to perl (e.g. /opt/perl), while the latter
2504 is useful if $prefix is shared by many packages, e.g. if
2506 This may later be extended to include other information, so
2507 be careful with pattern-matching on the results.
2508 For compatibility with perl5.005 and earlier, the default
2509 setting is based on whether or not $prefix contains the string
2512 installusrbinperl (instubperl.U):
2513 This variable tells whether Perl should be installed also as
2514 /usr/bin/perl in addition to
2517 installvendorarch (vendorarch.U):
2518 This variable is really the same as vendorarchexp but may differ on
2519 those systems using AFS. For extra portability, only this variable
2520 should be used in makefiles.
2522 installvendorbin (vendorbin.U):
2523 This variable is really the same as vendorbinexp but may differ on
2524 those systems using AFS. For extra portability, only this variable
2525 should be used in makefiles.
2527 installvendorlib (vendorlib.U):
2528 This variable is really the same as vendorlibexp but may differ on
2529 those systems using AFS. For extra portability, only this variable
2530 should be used in makefiles.
2532 intsize (intsize.U):
2533 This variable contains the value of the INTSIZE symbol, which
2534 indicates to the C program how many bytes there are in an int.
2536 issymlink (issymlink.U):
2537 This variable holds the test command to test for a symbolic link
2538 (if they are supported). Typical values include 'test -h' and
2541 ivdformat (perlxvf.U):
2542 This variable contains the format string used for printing
2543 a Perl IV as a signed decimal integer.
2546 This variable is the size of an IV in bytes.
2549 This variable contains the C type used for Perl's IV.
2551 known_extensions (Extensions.U):
2552 This variable holds a list of all XS extensions included in
2556 This variable is defined but not used by Configure.
2557 The value is a plain '' and is not useful.
2560 This variable indicates the program to be used to link
2561 libraries for dynamic loading. On some systems, it is 'ld'.
2562 On ELF systems, it should be $cc. Mostly, we'll try to respect
2563 the hint file setting.
2565 lddlflags (dlsrc.U):
2566 This variable contains any special flags that might need to be
2567 passed to $ld to create a shared library suitable for dynamic
2568 loading. It is up to the makefile to use it. For hpux, it
2569 should be '-b'. For sunos 4.1, it is empty.
2571 ldflags (ccflags.U):
2572 This variable contains any additional C loader flags desired by
2573 the user. It is up to the Makefile to use this.
2575 ldflags_uselargefiles (uselfs.U):
2576 This variable contains the loader flags needed by large file builds
2577 and added to ldflags by hints files.
2579 ldlibpthname (libperl.U):
2580 This variable holds the name of the shared library
2581 search path, often LD_LIBRARY_PATH. To get an empty
2582 string, the hints file must set this to 'none'.
2585 This variable is used internally by Configure to determine the
2586 full pathname (if any) of the less program. After Configure runs,
2587 the value is reset to a plain "less" and is not useful.
2590 This is an old synonym for _a.
2593 This variable contains the location of the C library.
2595 libperl (libperl.U):
2596 The perl executable is obtained by linking perlmain.c with
2597 libperl, any static extensions (usually just DynaLoader),
2598 and any other libraries needed on this system. libperl
2599 is usually libperl.a, but can also be libperl.so.xxx if
2600 the user wishes to build a perl executable with a shared
2604 This variable holds the general path (space-separated) used to find
2605 libraries. It is intended to be used by other units.
2608 This variable holds the additional libraries we want to use.
2609 It is up to the Makefile to deal with it.
2612 This variable holds the directory names aka dirnames of the libraries
2613 we found and accepted, duplicates are removed.
2616 This variable holds the filenames aka basenames of the libraries
2617 we found and accepted.
2620 This variable holds the full pathnames of the libraries
2621 we found and accepted.
2624 This variable holds the directory names probed for libraries.
2626 libswanted (Myinit.U):
2627 This variable holds a list of all the libraries we want to
2628 search. The order is chosen to pick up the c library
2629 ahead of ucb or bsd libraries for SVR4.
2631 libswanted_uselargefiles (uselfs.U):
2632 This variable contains the libraries needed by large file builds
2633 and added to ldflags by hints files. It is a space separated list
2634 of the library names without the "lib" prefix or any suffix, just
2638 This variable is defined but not used by Configure.
2639 The value is a plain '' and is not useful.
2642 This variable is defined but not used by Configure.
2643 The value is a plain '' and is not useful.
2645 lkflags (ccflags.U):
2646 This variable contains any additional C partial linker flags desired by
2647 the user. It is up to the Makefile to use this.
2650 This variable is used internally by Configure to determine the
2651 full pathname (if any) of the ln program. After Configure runs,
2652 the value is reset to a plain "ln" and is not useful.
2655 This variable holds the name of the command to make
2656 symbolic links (if they are supported). It can be used
2657 in the Makefile. It is either 'ln -s' or 'ln'
2659 locincpth (ccflags.U):
2660 This variable contains a list of additional directories to be
2661 searched by the compiler. The appropriate '-I' directives will
2662 be added to ccflags. This is intended to simplify setting
2663 local directories from the Configure command line.
2664 It's not much, but it parallels the loclibpth stuff in libpth.U.
2666 loclibpth (libpth.U):
2667 This variable holds the paths (space-separated) used to find local
2668 libraries. It is prepended to libpth, and is intended to be easily
2669 set from the command line.
2671 longdblsize (d_longdbl.U):
2672 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2673 indicates to the C program how many bytes there are in a long double,
2674 if this system supports long doubles.
2676 longlongsize (d_longlong.U):
2677 This variable contains the value of the LONGLONGSIZE symbol, which
2678 indicates to the C program how many bytes there are in a long long,
2679 if this system supports long long.
2681 longsize (intsize.U):
2682 This variable contains the value of the LONGSIZE symbol, which
2683 indicates to the C program how many bytes there are in a long.
2686 This variable is defined but not used by Configure.
2687 The value is a plain '' and is not useful.
2690 This variable is defined but not used by Configure.
2691 The value is a plain '' and is not useful.
2694 This variable is used internally by Configure to determine the
2695 full pathname (if any) of the ls program. After Configure runs,
2696 the value is reset to a plain "ls" and is not useful.
2698 lseeksize (lseektype.U):
2699 This variable defines lseektype to be something like off_t, long,
2700 or whatever type is used to declare lseek offset's type in the
2701 kernel (which also appears to be lseek's return type).
2703 lseektype (lseektype.U):
2704 This variable defines lseektype to be something like off_t, long,
2705 or whatever type is used to declare lseek offset's type in the
2706 kernel (which also appears to be lseek's return type).
2709 This variable is defined but not used by Configure.
2710 The value is a plain '' and is not useful.
2713 This variable is defined but not used by Configure.
2714 The value is a plain '' and is not useful.
2717 This variable is used internally by Configure to determine the
2718 full pathname (if any) of the make program. After Configure runs,
2719 the value is reset to a plain "make" and is not useful.
2721 make_set_make (make.U):
2722 Some versions of 'make' set the variable MAKE. Others do not.
2723 This variable contains the string to be included in Makefile.SH
2724 so that MAKE is set if needed, and not if not needed.
2725 Possible values are:
2726 make_set_make='#' # If your make program handles this for you,
2727 make_set_make="MAKE=$make" # if it doesn't.
2728 I used a comment character so that we can distinguish a
2729 'set' value (from a previous config.sh or Configure '-D' option)
2730 from an uncomputed value.
2732 mallocobj (mallocsrc.U):
2733 This variable contains the name of the malloc.o that this package
2734 generates, if that malloc.o is preferred over the system malloc.
2735 Otherwise the value is null. This variable is intended for generating
2736 Makefiles. See mallocsrc.
2738 mallocsrc (mallocsrc.U):
2739 This variable contains the name of the malloc.c that comes with
2740 the package, if that malloc.c is preferred over the system malloc.
2741 Otherwise the value is null. This variable is intended for generating
2744 malloctype (mallocsrc.U):
2745 This variable contains the kind of ptr returned by malloc and realloc.
2747 man1dir (man1dir.U):
2748 This variable contains the name of the directory in which manual
2749 source pages are to be put. It is the responsibility of the
2750 Makefile.SH to get the value of this into the proper command.
2751 You must be prepared to do the ~name expansion yourself.
2753 man1direxp (man1dir.U):
2754 This variable is the same as the man1dir variable, but is filename
2755 expanded at configuration time, for convenient use in makefiles.
2757 man1ext (man1dir.U):
2758 This variable contains the extension that the manual page should
2759 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2762 man3dir (man3dir.U):
2763 This variable contains the name of the directory in which manual
2764 source pages are to be put. It is the responsibility of the
2765 Makefile.SH to get the value of this into the proper command.
2766 You must be prepared to do the ~name expansion yourself.
2768 man3direxp (man3dir.U):
2769 This variable is the same as the man3dir variable, but is filename
2770 expanded at configuration time, for convenient use in makefiles.
2772 man3ext (man3dir.U):
2773 This variable contains the extension that the manual page should
2774 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2778 This variable is used internally by Configure to determine the
2779 full pathname (if any) of the Mcc program. After Configure runs,
2780 the value is reset to a plain "Mcc" and is not useful.
2782 mips_type (usrinc.U):
2783 This variable holds the environment type for the mips system.
2784 Possible values are "BSD 4.3" and "System V".
2787 This variable is used internally by Configure to determine the
2788 full pathname (if any) of the mkdir program. After Configure runs,
2789 the value is reset to a plain "mkdir" and is not useful.
2791 mmaptype (d_mmap.U):
2792 This symbol contains the type of pointer returned by mmap()
2793 (and simultaneously the type of the first argument).
2794 It can be 'void *' or 'caddr_t'.
2796 modetype (modetype.U):
2797 This variable defines modetype to be something like mode_t,
2798 int, unsigned short, or whatever type is used to declare file
2799 modes for system calls.
2802 This variable is used internally by Configure to determine the
2803 full pathname (if any) of the more program. After Configure runs,
2804 the value is reset to a plain "more" and is not useful.
2806 multiarch (multiarch.U):
2807 This variable conditionally defines the MULTIARCH symbol
2808 which signifies the presence of multiplatform files.
2809 This is normally set by hints files.
2812 This variable is defined but not used by Configure.
2813 The value is a plain '' and is not useful.
2815 myarchname (archname.U):
2816 This variable holds the architecture name computed by Configure in
2817 a previous run. It is not intended to be perused by any user and
2818 should never be set in a hint file.
2820 mydomain (myhostname.U):
2821 This variable contains the eventual value of the MYDOMAIN symbol,
2822 which is the domain of the host the program is going to run on.
2823 The domain must be appended to myhostname to form a complete host name.
2824 The dot comes with mydomain, and need not be supplied by the program.
2826 myhostname (myhostname.U):
2827 This variable contains the eventual value of the MYHOSTNAME symbol,
2828 which is the name of the host the program is going to run on.
2829 The domain is not kept with hostname, but must be gotten from mydomain.
2830 The dot comes with mydomain, and need not be supplied by the program.
2832 myuname (Oldconfig.U):
2833 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2834 pseudo variables assignments in the output are stripped, thank you. The
2835 whole thing is then lower-cased.
2838 This variable contains the '-n' flag if that is what causes the echo
2839 command to suppress newline. Otherwise it is null. Correct usage is
2840 $echo $n "prompt for a question: $c".
2842 need_va_copy (need_va_copy.U):
2843 This symbol, if defined, indicates that the system stores
2844 the variable argument list datatype, va_list, in a format
2845 that cannot be copied by simple assignment, so that some
2846 other means must be used when copying is required.
2847 As such systems vary in their provision (or non-provision)
2848 of copying mechanisms, handy.h defines a platform-
2849 independent macro, Perl_va_copy(src, dst), to do the job.
2851 netdb_hlen_type (netdbtype.U):
2852 This variable holds the type used for the 2nd argument to
2853 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2854 This is only useful if you have gethostbyaddr(), naturally.
2856 netdb_host_type (netdbtype.U):
2857 This variable holds the type used for the 1st argument to
2858 gethostbyaddr(). Usually, this is char * or void *, possibly
2859 with or without a const prefix.
2860 This is only useful if you have gethostbyaddr(), naturally.
2862 netdb_name_type (netdbtype.U):
2863 This variable holds the type used for the argument to
2864 gethostbyname(). Usually, this is char * or const char *.
2865 This is only useful if you have gethostbyname(), naturally.
2867 netdb_net_type (netdbtype.U):
2868 This variable holds the type used for the 1st argument to
2869 getnetbyaddr(). Usually, this is int or long.
2870 This is only useful if you have getnetbyaddr(), naturally.
2873 This variable is used internally by Configure to determine the
2874 full pathname (if any) of the nm program. After Configure runs,
2875 the value is reset to a plain "nm" and is not useful.
2878 This variable holds the options that may be necessary for nm.
2880 nm_so_opt (usenm.U):
2881 This variable holds the options that may be necessary for nm
2882 to work on a shared library but that can not be used on an
2883 archive library. Currently, this is only used by Linux, where
2884 nm --dynamic is *required* to get symbols from an ELF library which
2885 has been stripped, but nm --dynamic is *fatal* on an archive library.
2886 Maybe Linux should just always set usenm=false.
2888 nonxs_ext (Extensions.U):
2889 This variable holds a list of all non-xs extensions included
2890 in the package. All of them will be built.
2893 This variable is used internally by Configure to determine the
2894 full pathname (if any) of the nroff program. After Configure runs,
2895 the value is reset to a plain "nroff" and is not useful.
2897 nveformat (perlxvf.U):
2898 This variable contains the format string used for printing
2899 a Perl NV using %e-ish floating point format.
2901 nvEUformat (perlxvf.U):
2902 This variable contains the format string used for printing
2903 a Perl NV using %E-ish floating point format.
2905 nvfformat (perlxvf.U):
2906 This variable confains the format string used for printing
2907 a Perl NV using %f-ish floating point format.
2909 nvFUformat (perlxvf.U):
2910 This variable confains the format string used for printing
2911 a Perl NV using %F-ish floating point format.
2913 nvgformat (perlxvf.U):
2914 This variable contains the format string used for printing
2915 a Perl NV using %g-ish floating point format.
2917 nvGUformat (perlxvf.U):
2918 This variable contains the format string used for printing
2919 a Perl NV using %G-ish floating point format.
2922 This variable is the size of an NV in bytes.
2925 This variable contains the C type used for Perl's NV.
2927 o_nonblock (nblock_io.U):
2928 This variable bears the symbol value to be used during open() or fcntl()
2929 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2930 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2931 but that is only supported by some devices.
2934 This is an old synonym for _o.
2936 old_pthread_create_joinable (d_pthrattrj.U):
2937 This variable defines the constant to use for creating joinable
2938 (aka undetached) pthreads. Unused if pthread.h defines
2939 PTHREAD_CREATE_JOINABLE. If used, possible values are
2940 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2942 optimize (ccflags.U):
2943 This variable contains any optimizer/debugger flag that should be used.
2944 It is up to the Makefile to use it.
2946 orderlib (orderlib.U):
2947 This variable is "true" if the components of libraries must be ordered
2948 (with `lorder $* | tsort`) before placing them in an archive. Set to
2949 "false" if ranlib or ar can generate random libraries.
2951 osname (Oldconfig.U):
2952 This variable contains the operating system name (e.g. sunos,
2953 solaris, hpux, etc.). It can be useful later on for setting
2954 defaults. Any spaces are replaced with underscores. It is set
2955 to a null string if we can't figure it out.
2957 osvers (Oldconfig.U):
2958 This variable contains the operating system version (e.g.
2959 4.1.3, 5.2, etc.). It is primarily used for helping select
2960 an appropriate hints file, but might be useful elsewhere for
2961 setting defaults. It is set to '' if we can't figure it out.
2962 We try to be flexible about how much of the version number
2963 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2964 same for this package, hints files might just be os_4.0 or
2965 os_4.1, etc., not keeping separate files for each little release.
2967 otherlibdirs (otherlibdirs.U):
2968 This variable contains a colon-separated set of paths for the perl
2969 binary to search for additional library files or modules.
2970 These directories will be tacked to the end of @INC.
2971 Perl will automatically search below each path for version-
2972 and architecture-specific directories. See inc_version_list
2974 A value of ' ' means 'none' and is used to preserve this value
2975 for the next run through Configure.
2977 package (package.U):
2978 This variable contains the name of the package being constructed.
2979 It is primarily intended for the use of later Configure units.
2982 This variable contains the name of the preferred pager on the system.
2983 Usual values are (the full pathnames of) more, less, pg, or cat.
2986 This variable contains a command that produces the text of the
2987 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2988 "ypcat passwd" when NIS is used.
2989 On some systems, such as os390, there may be no equivalent
2990 command, in which case this variable is unset.
2992 patchlevel (patchlevel.U):
2993 The patchlevel level of this package.
2994 The value of patchlevel comes from the patchlevel.h file.
2995 In a version number such as 5.6.1, this is the "6".
2996 In patchlevel.h, this is referred to as "PERL_VERSION".
2999 This is an old synonym for p_ in Head.U, the character
3000 used to separate elements in the command shell search PATH.
3003 This variable contains the full path (if any) to a previously
3004 installed perl5.005 or later suitable for running the script
3005 to determine inc_version_list.
3008 This variable is defined but not used by Configure.
3009 The value is a plain '' and is not useful.
3011 perl_patchlevel (patchlevel.U):
3012 This is the Perl patch level, a numeric change identifier,
3013 as defined by whichever source code maintenance system
3014 is used to maintain the patches; currently Perforce.
3015 It does not correlate with the Perl version numbers or
3016 the maintenance versus development dichotomy except
3017 by also being increasing.
3019 PERL_REVISION (Oldsyms.U):
3020 In a Perl version number such as 5.6.2, this is the 5.
3021 This value is manually set in patchlevel.h
3023 PERL_SUBVERSION (Oldsyms.U):
3024 In a Perl version number such as 5.6.2, this is the 2.
3025 Values greater than 50 represent potentially unstable
3026 development subversions.
3027 This value is manually set in patchlevel.h
3029 PERL_VERSION (Oldsyms.U):
3030 In a Perl version number such as 5.6.2, this is the 6.
3031 This value is manually set in patchlevel.h
3033 perladmin (perladmin.U):
3034 Electronic mail address of the perl5 administrator.
3037 The list of libraries needed by Perl only (any libraries needed
3038 by extensions only will by dropped, if using dynamic loading).
3040 perlpath (perlpath.U):
3041 This variable contains the eventual value of the PERLPATH symbol,
3042 which contains the name of the perl interpreter to be used in
3043 shell scripts and in the "eval 'exec'" idiom.
3046 This variable is used internally by Configure to determine the
3047 full pathname (if any) of the pg program. After Configure runs,
3048 the value is reset to a plain "pg" and is not useful.
3050 phostname (myhostname.U):
3051 This variable contains the eventual value of the PHOSTNAME symbol,
3052 which is a command that can be fed to popen() to get the host name.
3053 The program should probably not presume that the domain is or isn't
3056 pidtype (pidtype.U):
3057 This variable defines PIDTYPE to be something like pid_t, int,
3058 ushort, or whatever type is used to declare process ids in the kernel.
3061 Holds the private path used by Configure to find out the libraries.
3062 Its value is prepend to libpth. This variable takes care of special
3063 machines, like the mips. Usually, it should be empty.
3065 pm_apiversion (xs_apiversion.U):
3066 This variable contains the version of the oldest perl
3067 compatible with the present perl. (That is, pure perl modules
3068 written for $pm_apiversion will still work for the current
3069 version). perl.c:incpush() and lib/lib.pm will automatically
3070 search in $sitelib for older directories across major versions
3071 back to pm_apiversion. This is only useful if you have a perl
3072 library directory tree structured like the default one. The
3073 versioned site_perl library was introduced in 5.005, so that's
3074 the default setting for this variable. It's hard to imagine
3075 it changing before Perl6. It is included here for symmetry
3076 with xs_apiveprsion -- the searching algorithms will
3077 (presumably) be similar.
3078 See the INSTALL file for how this works.
3081 This variable is defined but not used by Configure.
3082 The value is a plain '' and is not useful.
3085 This variable is defined but not used by Configure.
3086 The value is a plain '' and is not useful.
3089 This variable holds the name of the directory below which the
3090 user will install the package. Usually, this is /usr/local, and
3091 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3092 man pages in /usr/local/man, etc. It is only used to set defaults
3093 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3095 prefixexp (prefix.U):
3096 This variable holds the full absolute path of the directory below
3097 which the user will install the package. Derived from prefix.
3099 privlib (privlib.U):
3100 This variable contains the eventual value of the PRIVLIB symbol,
3101 which is the name of the private library for this package. It may
3102 have a ~ on the front. It is up to the makefile to eventually create
3103 this directory while performing installation (with ~ substitution).
3105 privlibexp (privlib.U):
3106 This variable is the ~name expanded version of privlib, so that you
3107 may use it directly in Makefiles or shell scripts.
3109 prototype (prototype.U):
3110 This variable holds the eventual value of CAN_PROTOTYPE, which
3111 indicates the C compiler can handle funciton prototypes.
3113 ptrsize (ptrsize.U):
3114 This variable contains the value of the PTRSIZE symbol, which
3115 indicates to the C program how many bytes there are in a pointer.
3117 quadkind (quadtype.U):
3118 This variable, if defined, encodes the type of a quad:
3119 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3121 quadtype (quadtype.U):
3122 This variable defines Quad_t to be something like long, int,
3123 long long, int64_t, or whatever type is used for 64-bit integers.
3125 randbits (randfunc.U):
3126 Indicates how many bits are produced by the function used to
3127 generate normalized random numbers.
3129 randfunc (randfunc.U):
3130 Indicates the name of the random number function to use.
3131 Values include drand48, random, and rand. In C programs,
3132 the 'Drand01' macro is defined to generate uniformly distributed
3133 random numbers over the range [0., 1.[ (see drand01 and nrand).
3135 randseedtype (randfunc.U):
3136 Indicates the type of the argument of the seedfunc.
3138 ranlib (orderlib.U):
3139 This variable is set to the pathname of the ranlib program, if it is
3140 needed to generate random libraries. Set to ":" if ar can generate
3141 random libraries or if random libraries are not supported
3143 rd_nodata (nblock_io.U):
3144 This variable holds the return code from read() when no data is
3145 present. It should be -1, but some systems return 0 when O_NDELAY is
3146 used, which is a shame because you cannot make the difference between
3147 no data and an EOF.. Sigh!
3149 revision (patchlevel.U):
3150 The value of revision comes from the patchlevel.h file.
3151 In a version number such as 5.6.1, this is the "5".
3152 In patchlevel.h, this is referred to as "PERL_REVISION".
3155 This variable is used internally by Configure to determine the
3156 full pathname (if any) of the rm program. After Configure runs,
3157 the value is reset to a plain "rm" and is not useful.
3160 This variable is defined but not used by Configure.
3161 The value is a plain '' and is not useful.
3164 This variable contains 'true' or 'false' depending whether the
3165 nm extraction should be performed or not, according to the value
3166 of usenm and the flags on the Configure command line.
3168 sched_yield (d_pthread_y.U):
3169 This variable defines the way to yield the execution
3170 of the current thread.
3172 scriptdir (scriptdir.U):
3173 This variable holds the name of the directory in which the user wants
3174 to put publicly scripts for the package in question. It is either
3175 the same directory as for binaries, or a special one that can be
3176 mounted across different architectures, like /usr/share. Programs
3177 must be prepared to deal with ~name expansion.
3179 scriptdirexp (scriptdir.U):
3180 This variable is the same as scriptdir, but is filename expanded
3181 at configuration time, for programs not wanting to bother with it.
3184 This variable is used internally by Configure to determine the
3185 full pathname (if any) of the sed program. After Configure runs,
3186 the value is reset to a plain "sed" and is not useful.
3188 seedfunc (randfunc.U):
3189 Indicates the random number generating seed function.
3190 Values include srand48, srandom, and srand.
3192 selectminbits (selectminbits.U):
3193 This variable holds the minimum number of bits operated by select.
3194 That is, if you do select(n, ...), how many bits at least will be
3195 cleared in the masks if some activity is detected. Usually this
3196 is either n or 32*ceil(n/32), especially many little-endians do
3197 the latter. This is only useful if you have select(), naturally.
3199 selecttype (selecttype.U):
3200 This variable holds the type used for the 2nd, 3rd, and 4th
3201 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3202 is defined, and 'int *' otherwise. This is only useful if you
3203 have select(), naturally.
3206 This variable is defined but not used by Configure.
3207 The value is a plain '' and is not useful.
3210 This variable contains the full pathname of the shell used
3211 on this system to execute Bourne shell scripts. Usually, this will be
3212 /bin/sh, though it's possible that some systems will have /bin/ksh,
3213 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3215 This unit comes before Options.U, so you can't set sh with a '-D'
3216 option, though you can override this (and startsh)
3217 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3220 This variable is defined but not used by Configure.
3221 The value is a plain '' and is not useful.
3223 sharpbang (spitshell.U):
3224 This variable contains the string #! if this system supports that
3227 shmattype (d_shmat.U):
3228 This symbol contains the type of pointer returned by shmat().
3229 It can be 'void *' or 'char *'.
3231 shortsize (intsize.U):
3232 This variable contains the value of the SHORTSIZE symbol which
3233 indicates to the C program how many bytes there are in a short.
3235 shrpenv (libperl.U):
3236 If the user builds a shared libperl.so, then we need to tell the
3237 'perl' executable where it will be able to find the installed libperl.so.
3238 One way to do this on some systems is to set the environment variable
3239 LD_RUN_PATH to the directory that will be the final location of the
3240 shared libperl.so. The makefile can use this with something like
3241 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3243 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3246 See the main perl Makefile.SH for actual working usage.
3247 Alternatively, we might be able to use a command line option such
3248 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3249 $archlibexp/CORE (Linux).
3251 shsharp (spitshell.U):
3252 This variable tells further Configure units whether your sh can
3255 sig_count (sig_name.U):
3256 This variable holds a number larger than the largest valid
3257 signal number. This is usually the same as the NSIG macro.
3259 sig_name (sig_name.U):
3260 This variable holds the signal names, space separated. The leading
3261 SIG in signal name is removed. A ZERO is prepended to the
3262 list. This is currently not used.
3264 sig_name_init (sig_name.U):
3265 This variable holds the signal names, enclosed in double quotes and
3266 separated by commas, suitable for use in the SIG_NAME definition
3267 below. A "ZERO" is prepended to the list, and the list is
3268 terminated with a plain 0. The leading SIG in signal names
3269 is removed. See sig_num.
3271 sig_num (sig_name.U):
3272 This variable holds the signal numbers, space separated. A ZERO is
3273 prepended to the list (corresponding to the fake SIGZERO), and
3274 the list is terminated with a 0. Those numbers correspond to
3275 the value of the signal listed in the same place within the
3278 sig_num_init (sig_name.U):
3279 This variable holds the signal numbers, enclosed in double quotes and
3280 separated by commas, suitable for use in the SIG_NUM definition
3281 below. A "ZERO" is prepended to the list, and the list is
3282 terminated with a plain 0.
3284 sig_size (sig_name.U):
3285 This variable contains the number of elements of the sig_name
3286 and sig_num arrays, excluding the final NULL entry.
3288 signal_t (d_voidsig.U):
3289 This variable holds the type of the signal handler (void or int).
3291 sitearch (sitearch.U):
3292 This variable contains the eventual value of the SITEARCH symbol,
3293 which is the name of the private library for this package. It may
3294 have a ~ on the front. It is up to the makefile to eventually create
3295 this directory while performing installation (with ~ substitution).
3296 The standard distribution will put nothing in this directory.
3297 After perl has been installed, users may install their own local
3298 architecture-dependent modules in this directory with
3299 MakeMaker Makefile.PL
3300 or equivalent. See INSTALL for details.
3302 sitearchexp (sitearch.U):
3303 This variable is the ~name expanded version of sitearch, so that you
3304 may use it directly in Makefiles or shell scripts.
3306 sitebin (sitebin.U):
3307 This variable holds the name of the directory in which the user wants
3308 to put add-on publicly executable files for the package in question. It
3309 is most often a local directory such as /usr/local/bin. Programs using
3310 this variable must be prepared to deal with ~name substitution.
3311 The standard distribution will put nothing in this directory.
3312 After perl has been installed, users may install their own local
3313 executables in this directory with
3314 MakeMaker Makefile.PL
3315 or equivalent. See INSTALL for details.
3317 sitebinexp (sitebin.U):
3318 This is the same as the sitebin variable, but is filename expanded at
3319 configuration time, for use in your makefiles.
3321 sitelib (sitelib.U):
3322 This variable contains the eventual value of the SITELIB symbol,
3323 which is the name of the private library for this package. It may
3324 have a ~ on the front. It is up to the makefile to eventually create
3325 this directory while performing installation (with ~ substitution).
3326 The standard distribution will put nothing in this directory.
3327 After perl has been installed, users may install their own local
3328 architecture-independent modules in this directory with
3329 MakeMaker Makefile.PL
3330 or equivalent. See INSTALL for details.
3332 sitelib_stem (sitelib.U):
3333 This variable is $sitelibexp with any trailing version-specific component
3334 removed. The elements in inc_version_list (inc_version_list.U) can
3335 be tacked onto this variable to generate a list of directories to search.
3337 sitelibexp (sitelib.U):
3338 This variable is the ~name expanded version of sitelib, so that you
3339 may use it directly in Makefiles or shell scripts.
3341 siteprefix (siteprefix.U):
3342 This variable holds the full absolute path of the directory below
3343 which the user will install add-on packages.
3344 See INSTALL for usage and examples.
3346 siteprefixexp (siteprefix.U):
3347 This variable holds the full absolute path of the directory below
3348 which the user will install add-on packages. Derived from siteprefix.
3350 sizesize (sizesize.U):
3351 This variable contains the size of a sizetype in bytes.
3353 sizetype (sizetype.U):
3354 This variable defines sizetype to be something like size_t,
3355 unsigned long, or whatever type is used to declare length
3356 parameters for string functions.
3359 This variable is defined but not used by Configure.
3360 The value is a plain '' and is not useful.
3363 This variable is defined but not used by Configure.
3364 The value is a plain '' and is not useful.
3367 This variable holds the extension used to identify shared libraries
3368 (also known as shared objects) on the system. Usually set to 'so'.
3370 sockethdr (d_socket.U):
3371 This variable has any cpp '-I' flags needed for socket support.
3373 socketlib (d_socket.U):
3374 This variable has the names of any libraries needed for socket support.
3376 socksizetype (socksizetype.U):
3377 This variable holds the type used for the size argument
3378 for various socket calls like accept. Usual values include
3379 socklen_t, size_t, and int.
3382 This variable is used internally by Configure to determine the
3383 full pathname (if any) of the sort program. After Configure runs,
3384 the value is reset to a plain "sort" and is not useful.
3386 spackage (package.U):
3387 This variable contains the name of the package being constructed,
3388 with the first letter uppercased, i.e. suitable for starting
3391 spitshell (spitshell.U):
3392 This variable contains the command necessary to spit out a runnable
3393 shell on this system. It is either cat or a grep '-v' for # comments.
3395 sPRId64 (quadfio.U):
3396 This variable, if defined, contains the string used by stdio to
3397 format 64-bit decimal numbers (format 'd') for output.
3399 sPRIeldbl (longdblfio.U):
3400 This variable, if defined, contains the string used by stdio to
3401 format long doubles (format 'e') for output.
3403 sPRIEUldbl (longdblfio.U):
3404 This variable, if defined, contains the string used by stdio to
3405 format long doubles (format 'E') for output.
3406 The 'U' in the name is to separate this from sPRIeldbl so that even
3407 case-blind systems can see the difference.
3409 sPRIfldbl (longdblfio.U):
3410 This variable, if defined, contains the string used by stdio to
3411 format long doubles (format 'f') for output.
3413 sPRIFUldbl (longdblfio.U):
3414 This variable, if defined, contains the string used by stdio to
3415 format long doubles (format 'F') for output.
3416 The 'U' in the name is to separate this from sPRIfldbl so that even
3417 case-blind systems can see the difference.
3419 sPRIgldbl (longdblfio.U):
3420 This variable, if defined, contains the string used by stdio to
3421 format long doubles (format 'g') for output.
3423 sPRIGUldbl (longdblfio.U):
3424 This variable, if defined, contains the string used by stdio to
3425 format long doubles (format 'G') for output.
3426 The 'U' in the name is to separate this from sPRIgldbl so that even
3427 case-blind systems can see the difference.
3429 sPRIi64 (quadfio.U):
3430 This variable, if defined, contains the string used by stdio to
3431 format 64-bit decimal numbers (format 'i') for output.
3433 sPRIo64 (quadfio.U):
3434 This variable, if defined, contains the string used by stdio to
3435 format 64-bit octal numbers (format 'o') for output.
3437 sPRIu64 (quadfio.U):
3438 This variable, if defined, contains the string used by stdio to
3439 format 64-bit unsigned decimal numbers (format 'u') for output.
3441 sPRIx64 (quadfio.U):
3442 This variable, if defined, contains the string used by stdio to
3443 format 64-bit hexadecimal numbers (format 'x') for output.
3445 sPRIXU64 (quadfio.U):
3446 This variable, if defined, contains the string used by stdio to
3447 format 64-bit hExADECimAl numbers (format 'X') for output.
3448 The 'U' in the name is to separate this from sPRIx64 so that even
3449 case-blind systems can see the difference.
3452 This variable holds the path to the package source. It is up to
3453 the Makefile to use this variable and set VPATH accordingly to
3454 find the sources remotely.
3456 sSCNfldbl (longdblfio.U):
3457 This variable, if defined, contains the string used by stdio to
3458 format long doubles (format 'f') for input.
3460 ssizetype (ssizetype.U):
3461 This variable defines ssizetype to be something like ssize_t,
3462 long or int. It is used by functions that return a count
3463 of bytes or an error condition. It must be a signed type.
3464 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3466 startperl (startperl.U):
3467 This variable contains the string to put on the front of a perl
3468 script to make sure (hopefully) that it runs with perl and not some
3469 shell. Of course, that leading line must be followed by the classical
3471 eval 'exec perl -S $0 ${1+"$@"}'
3472 if $running_under_some_shell;
3473 to guarantee perl startup should the shell execute the script. Note
3474 that this magic incatation is not understood by csh.
3476 startsh (startsh.U):
3477 This variable contains the string to put on the front of a shell
3478 script to make sure (hopefully) that it runs with sh and not some
3481 static_ext (Extensions.U):
3482 This variable holds a list of XS extension files we want to
3483 link statically into the package. It is used by Makefile.
3485 stdchar (stdchar.U):
3486 This variable conditionally defines STDCHAR to be the type of char
3487 used in stdio.h. It has the values "unsigned char" or "char".
3489 stdio_base (d_stdstdio.U):
3490 This variable defines how, given a FILE pointer, fp, to access the
3491 _base field (or equivalent) of stdio.h's FILE structure. This will
3492 be used to define the macro FILE_base(fp).
3494 stdio_bufsiz (d_stdstdio.U):
3495 This variable defines how, given a FILE pointer, fp, to determine
3496 the number of bytes store in the I/O buffer pointer to by the
3497 _base field (or equivalent) of stdio.h's FILE structure. This will
3498 be used to define the macro FILE_bufsiz(fp).
3500 stdio_cnt (d_stdstdio.U):
3501 This variable defines how, given a FILE pointer, fp, to access the
3502 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3503 be used to define the macro FILE_cnt(fp).
3505 stdio_filbuf (d_stdstdio.U):
3506 This variable defines how, given a FILE pointer, fp, to tell
3507 stdio to refill it's internal buffers (?). This will
3508 be used to define the macro FILE_filbuf(fp).
3510 stdio_ptr (d_stdstdio.U):
3511 This variable defines how, given a FILE pointer, fp, to access the
3512 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3513 be used to define the macro FILE_ptr(fp).
3515 stdio_stream_array (stdio_streams.U):
3516 This variable tells the name of the array holding the stdio streams.
3517 Usual values include _iob, __iob, and __sF.
3519 strings (i_string.U):
3520 This variable holds the full path of the string header that will be
3521 used. Typically /usr/include/string.h or /usr/include/strings.h.
3524 This variable is defined but not used by Configure.
3525 The value is a plain '' and is not useful.
3527 subversion (patchlevel.U):
3528 The subversion level of this package.
3529 The value of subversion comes from the patchlevel.h file.
3530 In a version number such as 5.6.1, this is the "1".
3531 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3532 This is unique to perl.
3535 This variable holds the place where the manual is located on this
3536 system. It is not the place where the user wants to put his manual
3537 pages. Rather it is the place where Configure may look to find manual
3538 for unix commands (section 1 of the manual usually). See mansrc.
3541 This variable is defined but not used by Configure.
3542 The value is a plain '' and is not useful.
3545 This variable is defined but not used by Configure.
3546 The value is a plain '' and is not useful.
3549 This variable is defined but not used by Configure.
3550 The value is a plain '' and is not useful.
3553 This variable is defined but not used by Configure.
3554 The value is a plain '' and is not useful.
3557 This variable is used internally by Configure to determine the
3558 full pathname (if any) of the test program. After Configure runs,
3559 the value is reset to a plain "test" and is not useful.
3561 timeincl (i_time.U):
3562 This variable holds the full path of the included time header(s).
3564 timetype (d_time.U):
3565 This variable holds the type returned by time(). It can be long,
3566 or time_t on BSD sites (in which case <sys/types.h> should be
3567 included). Anyway, the type Time_t should be used.
3570 This variable is used internally by Configure to determine the
3571 full pathname (if any) of the touch program. After Configure runs,
3572 the value is reset to a plain "touch" and is not useful.
3575 This variable is used internally by Configure to determine the
3576 full pathname (if any) of the tr program. After Configure runs,
3577 the value is reset to a plain "tr" and is not useful.
3580 This variable contains the value to be passed to the tr(1)
3581 command to transliterate a newline. Typical values are
3582 '\012' and '\n'. This is needed for EBCDIC systems where
3583 newline is not necessarily '\012'.
3586 This variable is defined but not used by Configure.
3587 The value is a plain '' and is not useful.
3590 This variable is the size of an U16 in bytes.
3593 This variable contains the C type used for Perl's U16.
3596 This variable is the size of an U32 in bytes.
3599 This variable contains the C type used for Perl's U32.
3602 This variable is the size of an U64 in bytes.
3605 This variable contains the C type used for Perl's U64.
3608 This variable is the size of an U8 in bytes.
3611 This variable contains the C type used for Perl's U8.
3614 This variable contains the format string used for printing a Uid_t.
3616 uidsign (uidsign.U):
3617 This variable contains the signedness of a uidtype.
3618 1 for unsigned, -1 for signed.
3620 uidsize (uidsize.U):
3621 This variable contains the size of a uidtype in bytes.
3623 uidtype (uidtype.U):
3624 This variable defines Uid_t to be something like uid_t, int,
3625 ushort, or whatever type is used to declare user ids in the kernel.
3628 This variable is used internally by Configure to determine the
3629 full pathname (if any) of the uname program. After Configure runs,
3630 the value is reset to a plain "uname" and is not useful.
3633 This variable is used internally by Configure to determine the
3634 full pathname (if any) of the uniq program. After Configure runs,
3635 the value is reset to a plain "uniq" and is not useful.
3637 uquadtype (quadtype.U):
3638 This variable defines Uquad_t to be something like unsigned long,
3639 unsigned int, unsigned long long, uint64_t, or whatever type is
3640 used for 64-bit integers.
3642 use5005threads (usethreads.U):
3643 This variable conditionally defines the USE_5005THREADS symbol,
3644 and indicates that Perl should be built to use the 5.005-based
3645 threading implementation.
3647 use64bitall (use64bits.U):
3648 This variable conditionally defines the USE_64_BIT_ALL symbol,
3649 and indicates that 64-bit integer types should be used
3650 when available. The maximal possible
3651 64-bitness is employed: LP64 or ILP64, meaning that you will
3652 be able to use more than 2 gigabytes of memory. This mode is
3653 even more binary incompatible than USE_64_BIT_INT. You may not
3654 be able to run the resulting executable in a 32-bit CPU at all or
3655 you may need at least to reboot your OS to 64-bit mode.
3657 use64bitint (use64bits.U):
3658 This variable conditionally defines the USE_64_BIT_INT symbol,
3659 and indicates that 64-bit integer types should be used
3660 when available. The minimal possible 64-bitness
3661 is employed, just enough to get 64-bit integers into Perl.
3662 This may mean using for example "long longs", while your memory
3663 may still be limited to 2 gigabytes.
3666 This variable indicates if the system supports dynamic
3667 loading of some sort. See also dlsrc and dlobj.
3669 useithreads (usethreads.U):
3670 This variable conditionally defines the USE_ITHREADS symbol,
3671 and indicates that Perl should be built to use the interpreter-based
3672 threading implementation.
3674 uselargefiles (uselfs.U):
3675 This variable conditionally defines the USE_LARGE_FILES symbol,
3676 and indicates that large file interfaces should be used when
3679 uselongdouble (uselongdbl.U):
3680 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3681 and indicates that long doubles should be used when available.
3683 usemorebits (usemorebits.U):
3684 This variable conditionally defines the USE_MORE_BITS symbol,
3685 and indicates that explicit 64-bit interfaces and long doubles
3686 should be used when available.
3688 usemultiplicity (usemultiplicity.U):
3689 This variable conditionally defines the MULTIPLICITY symbol,
3690 and indicates that Perl should be built to use multiplicity.
3692 usemymalloc (mallocsrc.U):
3693 This variable contains y if the malloc that comes with this package
3694 is desired over the system's version of malloc. People often include
3695 special versions of malloc for effiency, but such versions are often
3696 less portable. See also mallocsrc and mallocobj.
3697 If this is 'y', then -lmalloc is removed from $libs.
3700 This variable contains 'true' or 'false' depending whether the
3701 nm extraction is wanted or not.
3703 useopcode (Extensions.U):
3704 This variable holds either 'true' or 'false' to indicate
3705 whether the Opcode extension should be used. The sole
3706 use for this currently is to allow an easy mechanism
3707 for users to skip the Opcode extension from the Configure
3710 useperlio (useperlio.U):
3711 This variable conditionally defines the USE_PERLIO symbol,
3712 and indicates that the PerlIO abstraction should be
3715 useposix (Extensions.U):
3716 This variable holds either 'true' or 'false' to indicate
3717 whether the POSIX extension should be used. The sole
3718 use for this currently is to allow an easy mechanism
3719 for hints files to indicate that POSIX will not compile
3720 on a particular system.
3723 This variable is set to true when the user agrees to use sfio.
3724 It is set to false when sfio is not available or when the user
3725 explicitely requests not to use sfio. It is here primarily so
3726 that command-line settings can override the auto-detection of
3727 d_sfio without running into a "WHOA THERE".
3729 useshrplib (libperl.U):
3730 This variable is set to 'yes' if the user wishes
3731 to build a shared libperl, and 'no' otherwise.
3733 usesocks (usesocks.U):
3734 This variable conditionally defines the USE_SOCKS symbol,
3735 and indicates that Perl should be built to use SOCKS.
3737 usethreads (usethreads.U):
3738 This variable conditionally defines the USE_THREADS symbol,
3739 and indicates that Perl should be built to use threads.
3741 usevendorprefix (vendorprefix.U):
3742 This variable tells whether the vendorprefix
3743 and consequently other vendor* paths are in use.
3745 usevfork (d_vfork.U):
3746 This variable is set to true when the user accepts to use vfork.
3747 It is set to false when no vfork is available or when the user
3748 explicitely requests not to use vfork.
3751 This variable holds the path of the include files, which is
3752 usually /usr/include. It is mainly used by other Configure units.
3755 This variable is defined but not used by Configure.
3756 The value is a plain '' and is not useful.
3758 uvoformat (perlxvf.U):
3759 This variable contains the format string used for printing
3760 a Perl UV as an unsigned octal integer.
3763 This variable is the size of a UV in bytes.
3766 This variable contains the C type used for Perl's UV.
3768 uvuformat (perlxvf.U):
3769 This variable contains the format string used for printing
3770 a Perl UV as an unsigned decimal integer.
3772 uvxformat (perlxvf.U):
3773 This variable contains the format string used for printing
3774 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3776 uvXUformat (perlxvf.U):
3777 This variable contains the format string used for printing
3778 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3780 vendorarch (vendorarch.U):
3781 This variable contains the value of the PERL_VENDORARCH symbol.
3782 It may have a ~ on the front.
3783 The standard distribution will put nothing in this directory.
3784 Vendors who distribute perl may wish to place their own
3785 architecture-dependent modules and extensions in this directory with
3786 MakeMaker Makefile.PL INSTALLDIRS=vendor
3787 or equivalent. See INSTALL for details.
3789 vendorarchexp (vendorarch.U):
3790 This variable is the ~name expanded version of vendorarch, so that you
3791 may use it directly in Makefiles or shell scripts.
3793 vendorbin (vendorbin.U):
3794 This variable contains the eventual value of the VENDORBIN symbol.
3795 It may have a ~ on the front.
3796 The standard distribution will put nothing in this directory.
3797 Vendors who distribute perl may wish to place additional
3798 binaries in this directory with
3799 MakeMaker Makefile.PL INSTALLDIRS=vendor
3800 or equivalent. See INSTALL for details.
3802 vendorbinexp (vendorbin.U):
3803 This variable is the ~name expanded version of vendorbin, so that you
3804 may use it directly in Makefiles or shell scripts.
3806 vendorlib (vendorlib.U):
3807 This variable contains the eventual value of the VENDORLIB symbol,
3808 which is the name of the private library for this package.
3809 The standard distribution will put nothing in this directory.
3810 Vendors who distribute perl may wish to place their own
3811 modules in this directory with
3812 MakeMaker Makefile.PL INSTALLDIRS=vendor
3813 or equivalent. See INSTALL for details.
3815 vendorlib_stem (vendorlib.U):
3816 This variable is $vendorlibexp with any trailing version-specific component
3817 removed. The elements in inc_version_list (inc_version_list.U) can
3818 be tacked onto this variable to generate a list of directories to search.
3820 vendorlibexp (vendorlib.U):
3821 This variable is the ~name expanded version of vendorlib, so that you
3822 may use it directly in Makefiles or shell scripts.
3824 vendorprefix (vendorprefix.U):
3825 This variable holds the full absolute path of the directory below
3826 which the vendor will install add-on packages.
3827 See INSTALL for usage and examples.
3829 vendorprefixexp (vendorprefix.U):
3830 This variable holds the full absolute path of the directory below
3831 which the vendor will install add-on packages. Derived from vendorprefix.
3833 version (patchlevel.U):
3834 The full version number of this package, such as 5.6.1 (or 5_6_1).
3835 This combines revision, patchlevel, and subversion to get the
3836 full version number, including any possible subversions.
3837 This is suitable for use as a directory name, and hence is
3838 filesystem dependent.
3840 versiononly (versiononly.U):
3841 If set, this symbol indicates that only the version-specific
3842 components of a perl installation should be installed.
3843 This may be useful for making a test installation of a new
3844 version without disturbing the existing installation.
3845 Setting versiononly is equivalent to setting installperl's -v option.
3846 In particular, the non-versioned scripts and programs such as
3847 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3848 (see INSTALL for a more complete list). Nor are the man
3850 Usually, this is undef.
3853 This variable is defined but not used by Configure.
3854 The value is a plain '' and is not useful.
3856 voidflags (voidflags.U):
3857 This variable contains the eventual value of the VOIDFLAGS symbol,
3858 which indicates how much support of the void type is given by this
3859 compiler. See VOIDFLAGS for more info.
3862 This variable holds extra path (space-separated) used to find
3863 libraries on this platform, for example CPU-specific libraries
3864 (on multi-CPU platforms) may be listed here.
3866 xs_apiversion (xs_apiversion.U):
3867 This variable contains the version of the oldest perl binary
3868 compatible with the present perl. perl.c:incpush() and
3869 lib/lib.pm will automatically search in $sitearch for older
3870 directories across major versions back to xs_apiversion.
3871 This is only useful if you have a perl library directory tree
3872 structured like the default one.
3873 See INSTALL for how this works.
3874 The versioned site_perl directory was introduced in 5.005,
3875 so that is the lowest possible value.
3876 Since this can depend on compile time options (such as
3877 bincompat) it is set by Configure. Other non-default sources
3878 of potential incompatibility, such as multiplicity, threads,
3879 debugging, 64bits, sfio, etc., are not checked for currently,
3880 though in principle we could go snooping around in old
3884 This variable holds the name of the compiler compiler we
3885 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3888 This variable contains any additional yacc flags desired by the
3889 user. It is up to the Makefile to use this.
3892 This variable is defined but not used by Configure.
3893 The value is a plain '' and is not useful.
3896 This variable is used internally by Configure to determine the
3897 full pathname (if any) of the zip program. After Configure runs,
3898 the value is reset to a plain "zip" and is not useful.