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 used internally by Configure to determine the
247 full pathname (if any) of the chmod program. After Configure runs,
248 the value is reset to a plain "chmod" and is not useful.
251 This variable is defined but not used by Configure.
252 The value is a plain '' and is not useful.
254 clocktype (d_times.U):
255 This variable holds the type returned by times(). It can be long,
256 or clock_t on BSD sites (in which case <sys/types.h> should be
260 This variable is used internally by Configure to determine the
261 full pathname (if any) of the comm program. After Configure runs,
262 the value is reset to a plain "comm" and is not useful.
265 This variable is defined but not used by Configure.
266 The value is a plain '' and is not useful.
268 contains (contains.U):
269 This variable holds the command to do a grep with a proper return
270 status. On most sane systems it is simply "grep". On insane systems
271 it is a grep followed by a cat followed by a test. This variable
272 is primarily for the use of other Configure units.
275 This variable is used internally by Configure to determine the
276 full pathname (if any) of the cp program. After Configure runs,
277 the value is reset to a plain "cp" and is not useful.
280 This variable is defined but not used by Configure.
281 The value is a plain '' and is not useful.
284 This variable is used internally by Configure to determine the
285 full pathname (if any) of the cpp program. After Configure runs,
286 the value is reset to a plain "cpp" and is not useful.
288 cpp_stuff (cpp_stuff.U):
289 This variable contains an identification of the catenation mechanism
290 used by the C preprocessor.
292 cppccsymbols (Cppsym.U):
293 The variable contains the symbols defined by the C compiler
294 when it calls cpp. The symbols defined by the cc alone or cpp
295 alone are not in this list, see ccsymbols and cppsymbols.
296 The list is a space-separated list of symbol=value tokens.
298 cppflags (ccflags.U):
299 This variable holds the flags that will be passed to the C pre-
300 processor. It is up to the Makefile to use it.
302 cpplast (cppstdin.U):
303 This variable has the same functionality as cppminus, only it applies
304 to cpprun and not cppstdin.
306 cppminus (cppstdin.U):
307 This variable contains the second part of the string which will invoke
308 the C preprocessor on the standard input and produce to standard
309 output. This variable will have the value "-" if cppstdin needs
310 a minus to specify standard input, otherwise the value is "".
313 This variable contains the command which will invoke a C preprocessor
314 on standard input and put the output to stdout. It is guaranteed not
315 to be a wrapper and may be a null string if no preprocessor can be
316 made directly available. This preprocessor might be different from the
317 one used by the C compiler. Don't forget to append cpplast after the
318 preprocessor options.
320 cppstdin (cppstdin.U):
321 This variable contains the command which will invoke the C
322 preprocessor on standard input and put the output to stdout.
323 It is primarily used by other Configure units that ask about
324 preprocessor symbols.
326 cppsymbols (Cppsym.U):
327 The variable contains the symbols defined by the C preprocessor
328 alone. The symbols defined by cc or by cc when it calls cpp are
329 not in this list, see ccsymbols and cppccsymbols.
330 The list is a space-separated list of symbol=value tokens.
332 cryptlib (d_crypt.U):
333 This variable holds -lcrypt or the path to a libcrypt.a archive if
334 the crypt() function is not defined in the standard C library. It is
335 up to the Makefile to use this.
338 This variable is used internally by Configure to determine the
339 full pathname (if any) of the csh program. After Configure runs,
340 the value is reset to a plain "csh" and is not useful.
342 d__fwalk (d__fwalk.U):
343 This variable conditionally defines HAS__FWALK if _fwalk() is
344 available to apply a function to all the file handles.
346 d_access (d_access.U):
347 This variable conditionally defines HAS_ACCESS if the access() system
348 call is available to check for access permissions using real IDs.
350 d_accessx (d_accessx.U):
351 This variable conditionally defines the HAS_ACCESSX symbol, which
352 indicates to the C program that the accessx() routine is available.
355 This variable conditionally defines the HAS_ALARM symbol, which
356 indicates to the C program that the alarm() routine is available.
358 d_archlib (archlib.U):
359 This variable conditionally defines ARCHLIB to hold the pathname
360 of architecture-dependent library files for $package. If
361 $archlib is the same as $privlib, then this is set to undef.
364 This variable conditionally defines the HAS_ATOLF symbol, which
365 indicates to the C program that the atolf() routine is available.
368 This variable conditionally defines the HAS_ATOLL symbol, which
369 indicates to the C program that the atoll() routine is available.
371 d_attribut (d_attribut.U):
372 This variable conditionally defines HASATTRIBUTE, which
373 indicates the C compiler can check for function attributes,
374 such as printf formats.
377 This variable conditionally defines the HAS_BCMP symbol if
378 the bcmp() routine is available to compare strings.
381 This variable conditionally defines the HAS_BCOPY symbol if
382 the bcopy() routine is available to copy strings.
384 d_bincompat5005 (bincompat5005.U):
385 This variable conditionally defines BINCOMPAT5005 so that embed.h
386 can take special action if this version of Perl should be
387 binary-compatible with Perl 5.005. This is impossible for builds
388 that use features like threads and multiplicity it is always $undef
392 This symbol conditionally defines the symbol BSD when running on a
395 d_bsdgetpgrp (d_getpgrp.U):
396 This variable conditionally defines USE_BSD_GETPGRP if
397 getpgrp needs one arguments whereas USG one needs none.
399 d_bsdsetpgrp (d_setpgrp.U):
400 This variable conditionally defines USE_BSD_SETPGRP if
401 setpgrp needs two arguments whereas USG one needs none.
402 See also d_setpgid for a POSIX interface.
405 This variable conditionally defines the HAS_BZERO symbol if
406 the bzero() routine is available to set memory to 0.
408 d_casti32 (d_casti32.U):
409 This variable conditionally defines CASTI32, which indicates
410 whether the C compiler can cast large floats to 32-bit ints.
412 d_castneg (d_castneg.U):
413 This variable conditionally defines CASTNEG, which indicates
414 wether the C compiler can cast negative float to unsigned.
416 d_charvspr (d_vprintf.U):
417 This variable conditionally defines CHARVSPRINTF if this system
418 has vsprintf returning type (char*). The trend seems to be to
419 declare it as "int vsprintf()".
422 This variable conditionally defines the HAS_CHOWN symbol, which
423 indicates to the C program that the chown() routine is available.
425 d_chroot (d_chroot.U):
426 This variable conditionally defines the HAS_CHROOT symbol, which
427 indicates to the C program that the chroot() routine is available.
429 d_chsize (d_chsize.U):
430 This variable conditionally defines the CHSIZE symbol, which
431 indicates to the C program that the chsize() routine is available
432 to truncate files. You might need a -lx to get this routine.
434 d_closedir (d_closedir.U):
435 This variable conditionally defines HAS_CLOSEDIR if closedir() is
438 d_cmsghdr_s (d_cmsghdr_s.U):
439 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
440 which indicates that the struct cmsghdr is supported.
443 This variable conditionally defines the HASCONST symbol, which
444 indicates to the C program that this C compiler knows about the
448 This variable conditionally defines the CRYPT symbol, which
449 indicates to the C program that the crypt() routine is available
450 to encrypt passwords and the like.
453 This variable conditionally defines the CSH symbol, which
454 indicates to the C program that the C-shell exists.
456 d_cuserid (d_cuserid.U):
457 This variable conditionally defines the HAS_CUSERID symbol, which
458 indicates to the C program that the cuserid() routine is available
459 to get character login names.
461 d_dbl_dig (d_dbl_dig.U):
462 This variable conditionally defines d_dbl_dig if this system's
463 header files provide DBL_DIG, which is the number of significant
464 digits in a double precision number.
466 d_dbminitproto (d_dbminitproto.U):
467 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
468 which indicates to the C program that the system provides
469 a prototype for the dbminit() function. Otherwise, it is
470 up to the program to supply one.
472 d_difftime (d_difftime.U):
473 This variable conditionally defines the HAS_DIFFTIME symbol, which
474 indicates to the C program that the difftime() routine is available.
476 d_dirnamlen (i_dirent.U):
477 This variable conditionally defines DIRNAMLEN, which indicates
478 to the C program that the length of directory entry names is
479 provided by a d_namelen field.
481 d_dlerror (d_dlerror.U):
482 This variable conditionally defines the HAS_DLERROR symbol, which
483 indicates to the C program that the dlerror() routine is available.
485 d_dlopen (d_dlopen.U):
486 This variable conditionally defines the HAS_DLOPEN symbol, which
487 indicates to the C program that the dlopen() routine is available.
489 d_dlsymun (d_dlsymun.U):
490 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
491 indicates that we need to prepend an underscore to the symbol
492 name before calling dlsym().
494 d_dosuid (d_dosuid.U):
495 This variable conditionally defines the symbol DOSUID, which
496 tells the C program that it should insert setuid emulation code
497 on hosts which have setuid #! scripts disabled.
499 d_drand48proto (d_drand48proto.U):
500 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
501 which indicates to the C program that the system provides
502 a prototype for the drand48() function. Otherwise, it is
503 up to the program to supply one.
506 This variable conditionally defines HAS_DUP2 if dup2() is
507 available to duplicate file descriptors.
509 d_eaccess (d_eaccess.U):
510 This variable conditionally defines the HAS_EACCESS symbol, which
511 indicates to the C program that the eaccess() routine is available.
513 d_endgrent (d_endgrent.U):
514 This variable conditionally defines the HAS_ENDGRENT symbol, which
515 indicates to the C program that the endgrent() routine is available
516 for sequential access of the group database.
518 d_endhent (d_endhent.U):
519 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
520 available to close whatever was being used for host queries.
522 d_endnent (d_endnent.U):
523 This variable conditionally defines HAS_ENDNETENT if endnetent() is
524 available to close whatever was being used for network queries.
526 d_endpent (d_endpent.U):
527 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
528 available to close whatever was being used for protocol queries.
530 d_endpwent (d_endpwent.U):
531 This variable conditionally defines the HAS_ENDPWENT symbol, which
532 indicates to the C program that the endpwent() routine is available
533 for sequential access of the passwd database.
535 d_endsent (d_endsent.U):
536 This variable conditionally defines HAS_ENDSERVENT if endservent() is
537 available to close whatever was being used for service queries.
539 d_eofnblk (nblock_io.U):
540 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
541 when reading from a non-blocking I/O source.
544 This variable conditionally defines the symbols EUNICE and VAX, which
545 alerts the C program that it must deal with ideosyncracies of VMS.
547 d_fchdir (d_fchdir.U):
548 This variable conditionally defines the HAS_FCHDIR symbol, which
549 indicates to the C program that the fchdir() routine is available.
551 d_fchmod (d_fchmod.U):
552 This variable conditionally defines the HAS_FCHMOD symbol, which
553 indicates to the C program that the fchmod() routine is available
554 to change mode of opened files.
556 d_fchown (d_fchown.U):
557 This variable conditionally defines the HAS_FCHOWN symbol, which
558 indicates to the C program that the fchown() routine is available
559 to change ownership of opened files.
562 This variable conditionally defines the HAS_FCNTL symbol, and indicates
563 whether the fcntl() function exists
565 d_fcntl_can_lock (d_fcntl_can_lock.U):
566 This variable conditionally defines the FCNTL_CAN_LOCK symbol
567 and indicates whether file locking with fcntl() works.
569 d_fd_macros (d_fd_set.U):
570 This variable contains the eventual value of the HAS_FD_MACROS symbol,
571 which indicates if your C compiler knows about the macros which
572 manipulate an fd_set.
574 d_fd_set (d_fd_set.U):
575 This variable contains the eventual value of the HAS_FD_SET symbol,
576 which indicates if your C compiler knows about the fd_set typedef.
578 d_fds_bits (d_fd_set.U):
579 This variable contains the eventual value of the HAS_FDS_BITS symbol,
580 which indicates if your fd_set typedef contains the fds_bits member.
581 If you have an fd_set typedef, but the dweebs who installed it did
582 a half-fast job and neglected to provide the macros to manipulate
583 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
585 d_fgetpos (d_fgetpos.U):
586 This variable conditionally defines HAS_FGETPOS if fgetpos() is
587 available to get the file position indicator.
589 d_flexfnam (d_flexfnam.U):
590 This variable conditionally defines the FLEXFILENAMES symbol, which
591 indicates that the system supports filenames longer than 14 characters.
594 This variable conditionally defines HAS_FLOCK if flock() is
595 available to do file locking.
597 d_flockproto (d_flockproto.U):
598 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
599 which indicates to the C program that the system provides
600 a prototype for the flock() function. Otherwise, it is
601 up to the program to supply one.
604 This variable conditionally defines the HAS_FORK symbol, which
605 indicates to the C program that the fork() routine is available.
607 d_fpathconf (d_pathconf.U):
608 This variable conditionally defines the HAS_FPATHCONF symbol, which
609 indicates to the C program that the pathconf() routine is available
610 to determine file-system related limits and options associated
611 with a given open file descriptor.
613 d_fpos64_t (d_fpos64_t.U):
614 This symbol will be defined if the C compiler supports fpos64_t.
616 d_frexpl (d_frexpl.U):
617 This variable conditionally defines the HAS_FREXPL symbol, which
618 indicates to the C program that the frexpl() routine is available.
620 d_fs_data_s (d_fs_data_s.U):
621 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
622 which indicates that the struct fs_data is supported.
624 d_fseeko (d_fseeko.U):
625 This variable conditionally defines the HAS_FSEEKO symbol, which
626 indicates to the C program that the fseeko() routine is available.
628 d_fsetpos (d_fsetpos.U):
629 This variable conditionally defines HAS_FSETPOS if fsetpos() is
630 available to set the file position indicator.
632 d_fstatfs (d_fstatfs.U):
633 This variable conditionally defines the HAS_FSTATFS symbol, which
634 indicates to the C program that the fstatfs() routine is available.
636 d_fstatvfs (d_statvfs.U):
637 This variable conditionally defines the HAS_FSTATVFS symbol, which
638 indicates to the C program that the fstatvfs() routine is available.
641 This variable conditionally defines the HAS_FSYNC symbol, which
642 indicates to the C program that the fsync() routine is available.
644 d_ftello (d_ftello.U):
645 This variable conditionally defines the HAS_FTELLO symbol, which
646 indicates to the C program that the ftello() routine is available.
649 This variable conditionally defines the HAS_FTIME symbol, which indicates
650 that the ftime() routine exists. The ftime() routine is basically
651 a sub-second accuracy clock.
653 d_Gconvert (d_gconvert.U):
654 This variable holds what Gconvert is defined as to convert
655 floating point numbers into strings. It could be 'gconvert'
656 or a more complex macro emulating gconvert with gcvt() or sprintf.
658 d_Gconvert='gconvert((x),(n),(t),(b))'
659 d_Gconvert='gcvt((x),(n),(b))'
660 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
662 d_getcwd (d_getcwd.U):
663 This variable conditionally defines the HAS_GETCWD symbol, which
664 indicates to the C program that the getcwd() routine is available
665 to get the current working directory.
667 d_getespwnam (d_getespwnam.U):
668 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
669 available to retrieve enchanced (shadow) password entries by name.
671 d_getfsstat (d_getfsstat.U):
672 This variable conditionally defines the HAS_GETFSSTAT symbol, which
673 indicates to the C program that the getfsstat() routine is available.
675 d_getgrent (d_getgrent.U):
676 This variable conditionally defines the HAS_GETGRENT symbol, which
677 indicates to the C program that the getgrent() routine is available
678 for sequential access of the group database.
680 d_getgrps (d_getgrps.U):
681 This variable conditionally defines the HAS_GETGROUPS symbol, which
682 indicates to the C program that the getgroups() routine is available
683 to get the list of process groups.
685 d_gethbyaddr (d_gethbyad.U):
686 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
687 indicates to the C program that the gethostbyaddr() routine is available
688 to look up hosts by their IP addresses.
690 d_gethbyname (d_gethbynm.U):
691 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
692 indicates to the C program that the gethostbyname() routine is available
693 to look up host names in some data base or other.
695 d_gethent (d_gethent.U):
696 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
697 available to look up host names in some data base or another.
699 d_gethname (d_gethname.U):
700 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
701 indicates to the C program that the gethostname() routine may be
702 used to derive the host name.
704 d_gethostprotos (d_gethostprotos.U):
705 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
706 which indicates to the C program that <netdb.h> supplies
707 prototypes for the various gethost*() functions.
708 See also netdbtype.U for probing for various netdb types.
710 d_getitimer (d_getitimer.U):
711 This variable conditionally defines the HAS_GETITIMER symbol, which
712 indicates to the C program that the getitimer() routine is available.
714 d_getlogin (d_getlogin.U):
715 This variable conditionally defines the HAS_GETLOGIN symbol, which
716 indicates to the C program that the getlogin() routine is available
717 to get the login name.
719 d_getmnt (d_getmnt.U):
720 This variable conditionally defines the HAS_GETMNT symbol, which
721 indicates to the C program that the getmnt() routine is available
722 to retrieve one or more mount info blocks by filename.
724 d_getmntent (d_getmntent.U):
725 This variable conditionally defines the HAS_GETMNTENT symbol, which
726 indicates to the C program that the getmntent() routine is available
727 to iterate through mounted files to get their mount info.
729 d_getnbyaddr (d_getnbyad.U):
730 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
731 indicates to the C program that the getnetbyaddr() routine is available
732 to look up networks by their IP addresses.
734 d_getnbyname (d_getnbynm.U):
735 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
736 indicates to the C program that the getnetbyname() routine is available
737 to look up networks by their names.
739 d_getnent (d_getnent.U):
740 This variable conditionally defines HAS_GETNETENT if getnetent() is
741 available to look up network names in some data base or another.
743 d_getnetprotos (d_getnetprotos.U):
744 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
745 which indicates to the C program that <netdb.h> supplies
746 prototypes for the various getnet*() functions.
747 See also netdbtype.U for probing for various netdb types.
749 d_getpagsz (d_getpagsz.U):
750 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
751 is available to get the system page size.
753 d_getpbyname (d_getprotby.U):
754 This variable conditionally defines the HAS_GETPROTOBYNAME
755 symbol, which indicates to the C program that the
756 getprotobyname() routine is available to look up protocols
759 d_getpbynumber (d_getprotby.U):
760 This variable conditionally defines the HAS_GETPROTOBYNUMBER
761 symbol, which indicates to the C program that the
762 getprotobynumber() routine is available to look up protocols
765 d_getpent (d_getpent.U):
766 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
767 available to look up protocols in some data base or another.
769 d_getpgid (d_getpgid.U):
770 This variable conditionally defines the HAS_GETPGID symbol, which
771 indicates to the C program that the getpgid(pid) function
772 is available to get the process group id.
774 d_getpgrp2 (d_getpgrp2.U):
775 This variable conditionally defines the HAS_GETPGRP2 symbol, which
776 indicates to the C program that the getpgrp2() (as in DG/UX) routine
777 is available to get the current process group.
779 d_getpgrp (d_getpgrp.U):
780 This variable conditionally defines HAS_GETPGRP if getpgrp() is
781 available to get the current process group.
783 d_getppid (d_getppid.U):
784 This variable conditionally defines the HAS_GETPPID symbol, which
785 indicates to the C program that the getppid() routine is available
786 to get the parent process ID.
788 d_getprior (d_getprior.U):
789 This variable conditionally defines HAS_GETPRIORITY if getpriority()
790 is available to get a process's priority.
792 d_getprotoprotos (d_getprotoprotos.U):
793 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
794 which indicates to the C program that <netdb.h> supplies
795 prototypes for the various getproto*() functions.
796 See also netdbtype.U for probing for various netdb types.
798 d_getprpwnam (d_getprpwnam.U):
799 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
800 available to retrieve protected (shadow) password entries by name.
802 d_getpwent (d_getpwent.U):
803 This variable conditionally defines the HAS_GETPWENT symbol, which
804 indicates to the C program that the getpwent() routine is available
805 for sequential access of the passwd database.
807 d_getsbyname (d_getsrvby.U):
808 This variable conditionally defines the HAS_GETSERVBYNAME
809 symbol, which indicates to the C program that the
810 getservbyname() routine is available to look up services
813 d_getsbyport (d_getsrvby.U):
814 This variable conditionally defines the HAS_GETSERVBYPORT
815 symbol, which indicates to the C program that the
816 getservbyport() routine is available to look up services
819 d_getsent (d_getsent.U):
820 This variable conditionally defines HAS_GETSERVENT if getservent() is
821 available to look up network services in some data base or another.
823 d_getservprotos (d_getservprotos.U):
824 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
825 which indicates to the C program that <netdb.h> supplies
826 prototypes for the various getserv*() functions.
827 See also netdbtype.U for probing for various netdb types.
829 d_getspnam (d_getspnam.U):
830 This variable conditionally defines HAS_GETSPNAM if getspnam() is
831 available to retrieve SysV shadow password entries by name.
833 d_gettimeod (d_ftime.U):
834 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
835 indicates that the gettimeofday() system call exists (to obtain a
836 sub-second accuracy clock). You should probably include <sys/resource.h>.
838 d_gnulibc (d_gnulibc.U):
839 Defined if we're dealing with the GNU C Library.
841 d_grpasswd (i_grp.U):
842 This variable conditionally defines GRPASSWD, which indicates
843 that struct group in <grp.h> contains gr_passwd.
845 d_hasmntopt (d_hasmntopt.U):
846 This variable conditionally defines the HAS_HASMNTOPT symbol, which
847 indicates to the C program that the hasmntopt() routine is available
848 to query the mount options of file systems.
851 This variable conditionally defines HAS_HTONL if htonl() and its
852 friends are available to do network order byte swapping.
855 This variable conditionally defines the HAS_ICONV symbol, which
856 indicates to the C program that the iconv() routine is available.
858 d_index (d_strchr.U):
859 This variable conditionally defines HAS_INDEX if index() and
860 rindex() are available for string searching.
862 d_inetaton (d_inetaton.U):
863 This variable conditionally defines the HAS_INET_ATON symbol, which
864 indicates to the C program that the inet_aton() function is available
865 to parse IP address "dotted-quad" strings.
867 d_int64_t (d_int64_t.U):
868 This symbol will be defined if the C compiler supports int64_t.
870 d_isascii (d_isascii.U):
871 This variable conditionally defines the HAS_ISASCII constant,
872 which indicates to the C program that isascii() is available.
875 This variable conditionally defines the HAS_ISNAN symbol, which
876 indicates to the C program that the isnan() routine is available.
878 d_isnanl (d_isnanl.U):
879 This variable conditionally defines the HAS_ISNANL symbol, which
880 indicates to the C program that the isnanl() routine is available.
882 d_killpg (d_killpg.U):
883 This variable conditionally defines the HAS_KILLPG symbol, which
884 indicates to the C program that the killpg() routine is available
885 to kill process groups.
887 d_lchown (d_lchown.U):
888 This variable conditionally defines the HAS_LCHOWN symbol, which
889 indicates to the C program that the lchown() routine is available
890 to operate on a symbolic link (instead of following the link).
892 d_ldbl_dig (d_ldbl_dig.U):
893 This variable conditionally defines d_ldbl_dig if this system's
894 header files provide LDBL_DIG, which is the number of significant
895 digits in a long double precision number.
898 This variable conditionally defines HAS_LINK if link() is
899 available to create hard links.
901 d_locconv (d_locconv.U):
902 This variable conditionally defines HAS_LOCALECONV if localeconv() is
903 available for numeric and monetary formatting conventions.
906 This variable conditionally defines HAS_LOCKF if lockf() is
907 available to do file locking.
909 d_longdbl (d_longdbl.U):
910 This variable conditionally defines HAS_LONG_DOUBLE if
911 the long double type is supported.
913 d_longlong (d_longlong.U):
914 This variable conditionally defines HAS_LONG_LONG if
915 the long long type is supported.
917 d_lseekproto (d_lseekproto.U):
918 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
919 which indicates to the C program that the system provides
920 a prototype for the lseek() function. Otherwise, it is
921 up to the program to supply one.
924 This variable conditionally defines HAS_LSTAT if lstat() is
925 available to do file stats on symbolic links.
927 d_madvise (d_madvise.U):
928 This variable conditionally defines HAS_MADVISE if madvise() is
929 available to map a file into memory.
932 This variable conditionally defines the HAS_MBLEN symbol, which
933 indicates to the C program that the mblen() routine is available
934 to find the number of bytes in a multibye character.
936 d_mbstowcs (d_mbstowcs.U):
937 This variable conditionally defines the HAS_MBSTOWCS symbol, which
938 indicates to the C program that the mbstowcs() routine is available
939 to convert a multibyte string into a wide character string.
941 d_mbtowc (d_mbtowc.U):
942 This variable conditionally defines the HAS_MBTOWC symbol, which
943 indicates to the C program that the mbtowc() routine is available
944 to convert multibyte to a wide character.
946 d_memchr (d_memchr.U):
947 This variable conditionally defines the HAS_MEMCHR symbol, which
948 indicates to the C program that the memchr() routine is available
949 to locate characters within a C string.
951 d_memcmp (d_memcmp.U):
952 This variable conditionally defines the HAS_MEMCMP symbol, which
953 indicates to the C program that the memcmp() routine is available
954 to compare blocks of memory.
956 d_memcpy (d_memcpy.U):
957 This variable conditionally defines the HAS_MEMCPY symbol, which
958 indicates to the C program that the memcpy() routine is available
959 to copy blocks of memory.
961 d_memmove (d_memmove.U):
962 This variable conditionally defines the HAS_MEMMOVE symbol, which
963 indicates to the C program that the memmove() routine is available
964 to copy potentatially overlapping blocks of memory.
966 d_memset (d_memset.U):
967 This variable conditionally defines the HAS_MEMSET symbol, which
968 indicates to the C program that the memset() routine is available
969 to set blocks of memory.
972 This variable conditionally defines the HAS_MKDIR symbol, which
973 indicates to the C program that the mkdir() routine is available
974 to create directories..
976 d_mkdtemp (d_mkdtemp.U):
977 This variable conditionally defines the HAS_MKDTEMP symbol, which
978 indicates to the C program that the mkdtemp() routine is available
979 to exclusively create a uniquely named temporary directory.
981 d_mkfifo (d_mkfifo.U):
982 This variable conditionally defines the HAS_MKFIFO symbol, which
983 indicates to the C program that the mkfifo() routine is available.
985 d_mkstemp (d_mkstemp.U):
986 This variable conditionally defines the HAS_MKSTEMP symbol, which
987 indicates to the C program that the mkstemp() routine is available
988 to exclusively create and open a uniquely named temporary file.
990 d_mkstemps (d_mkstemps.U):
991 This variable conditionally defines the HAS_MKSTEMPS symbol, which
992 indicates to the C program that the mkstemps() routine is available
993 to exclusively create and open a uniquely named (with a suffix)
996 d_mktime (d_mktime.U):
997 This variable conditionally defines the HAS_MKTIME symbol, which
998 indicates to the C program that the mktime() routine is available.
1001 This variable conditionally defines HAS_MMAP if mmap() is
1002 available to map a file into memory.
1004 d_modfl (d_modfl.U):
1005 This variable conditionally defines the HAS_MODFL symbol, which
1006 indicates to the C program that the modfl() routine is available.
1008 d_modfl_pow32_bug (d_modfl.U):
1009 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1010 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1011 For example from 4294967303.150000 one would get 4294967302.000000
1012 and 1.150000. The bug has been seen in certain versions of glibc,
1013 release 2.2.2 is known to be okay.
1015 d_mprotect (d_mprotect.U):
1016 This variable conditionally defines HAS_MPROTECT if mprotect() is
1017 available to modify the access protection of a memory mapped file.
1020 This variable conditionally defines the HAS_MSG symbol, which
1021 indicates that the entire msg*(2) library is present.
1023 d_msg_ctrunc (d_socket.U):
1024 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1025 which indicates that the MSG_CTRUNC is available. #ifdef is
1026 not enough because it may be an enum, glibc has been known to do this.
1028 d_msg_dontroute (d_socket.U):
1029 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1030 which indicates that the MSG_DONTROUTE is available. #ifdef is
1031 not enough because it may be an enum, glibc has been known to do this.
1033 d_msg_oob (d_socket.U):
1034 This variable conditionally defines the HAS_MSG_OOB symbol,
1035 which indicates that the MSG_OOB is available. #ifdef is
1036 not enough because it may be an enum, glibc has been known to do this.
1038 d_msg_peek (d_socket.U):
1039 This variable conditionally defines the HAS_MSG_PEEK symbol,
1040 which indicates that the MSG_PEEK is available. #ifdef is
1041 not enough because it may be an enum, glibc has been known to do this.
1043 d_msg_proxy (d_socket.U):
1044 This variable conditionally defines the HAS_MSG_PROXY symbol,
1045 which indicates that the MSG_PROXY is available. #ifdef is
1046 not enough because it may be an enum, glibc has been known to do this.
1048 d_msgctl (d_msgctl.U):
1049 This variable conditionally defines the HAS_MSGCTL symbol, which
1050 indicates to the C program that the msgctl() routine is available.
1052 d_msgget (d_msgget.U):
1053 This variable conditionally defines the HAS_MSGGET symbol, which
1054 indicates to the C program that the msgget() routine is available.
1056 d_msghdr_s (d_msghdr_s.U):
1057 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1058 which indicates that the struct msghdr is supported.
1060 d_msgrcv (d_msgrcv.U):
1061 This variable conditionally defines the HAS_MSGRCV symbol, which
1062 indicates to the C program that the msgrcv() routine is available.
1064 d_msgsnd (d_msgsnd.U):
1065 This variable conditionally defines the HAS_MSGSND symbol, which
1066 indicates to the C program that the msgsnd() routine is available.
1068 d_msync (d_msync.U):
1069 This variable conditionally defines HAS_MSYNC if msync() is
1070 available to synchronize a mapped file.
1072 d_munmap (d_munmap.U):
1073 This variable conditionally defines HAS_MUNMAP if munmap() is
1074 available to unmap a region mapped by mmap().
1076 d_mymalloc (mallocsrc.U):
1077 This variable conditionally defines MYMALLOC in case other parts
1078 of the source want to take special action if MYMALLOC is used.
1079 This may include different sorts of profiling or error detection.
1082 This variable conditionally defines the HAS_NICE symbol, which
1083 indicates to the C program that the nice() routine is available.
1085 d_nl_langinfo (d_nl_langinfo.U):
1086 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1087 indicates to the C program that the nl_langinfo() routine is available.
1089 d_nv_preserves_uv (perlxv.U):
1090 This variable indicates whether a variable of type nvtype
1091 can preserve all the bits a variable of type uvtype.
1093 d_nv_preserves_uv_bits (perlxv.U):
1094 This variable indicates how many of bits type uvtype
1095 a variable nvtype can preserve.
1097 d_off64_t (d_off64_t.U):
1098 This symbol will be defined if the C compiler supports off64_t.
1100 d_old_pthread_create_joinable (d_pthrattrj.U):
1101 This variable conditionally defines pthread_create_joinable.
1102 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1104 d_oldpthreads (usethreads.U):
1105 This variable conditionally defines the OLD_PTHREADS_API symbol,
1106 and indicates that Perl should be built to use the old
1107 draft POSIX threads API. This is only potentially meaningful if
1110 d_oldsock (d_socket.U):
1111 This variable conditionally defines the OLDSOCKET symbol, which
1112 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1114 d_open3 (d_open3.U):
1115 This variable conditionally defines the HAS_OPEN3 manifest constant,
1116 which indicates to the C program that the 3 argument version of
1117 the open(2) function is available.
1119 d_pathconf (d_pathconf.U):
1120 This variable conditionally defines the HAS_PATHCONF symbol, which
1121 indicates to the C program that the pathconf() routine is available
1122 to determine file-system related limits and options associated
1123 with a given filename.
1125 d_pause (d_pause.U):
1126 This variable conditionally defines the HAS_PAUSE symbol, which
1127 indicates to the C program that the pause() routine is available
1128 to suspend a process until a signal is received.
1130 d_perl_otherlibdirs (otherlibdirs.U):
1131 This variable conditionally defines PERL_OTHERLIBDIRS, which
1132 contains a colon-separated set of paths for the perl binary to
1133 include in @INC. See also otherlibdirs.
1135 d_phostname (d_gethname.U):
1136 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1137 contains the shell command which, when fed to popen(), may be
1138 used to derive the host name.
1141 This variable conditionally defines the HAS_PIPE symbol, which
1142 indicates to the C program that the pipe() routine is available
1143 to create an inter-process channel.
1146 This variable conditionally defines the HAS_POLL symbol, which
1147 indicates to the C program that the poll() routine is available
1148 to poll active file descriptors.
1150 d_portable (d_portable.U):
1151 This variable conditionally defines the PORTABLE symbol, which
1152 indicates to the C program that it should not assume that it is
1153 running on the machine it was compiled on.
1155 d_PRId64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRId64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1159 d_PRIeldbl (longdblfio.U):
1160 This variable conditionally defines the PERL_PRIfldbl symbol, which
1161 indiciates that stdio has a symbol to print long doubles.
1163 d_PRIEUldbl (longdblfio.U):
1164 This variable conditionally defines the PERL_PRIfldbl symbol, which
1165 indiciates that stdio has a symbol to print long doubles.
1166 The 'U' in the name is to separate this from d_PRIeldbl so that even
1167 case-blind systems can see the difference.
1169 d_PRIfldbl (longdblfio.U):
1170 This variable conditionally defines the PERL_PRIfldbl symbol, which
1171 indiciates that stdio has a symbol to print long doubles.
1173 d_PRIFUldbl (longdblfio.U):
1174 This variable conditionally defines the PERL_PRIfldbl symbol, which
1175 indiciates that stdio has a symbol to print long doubles.
1176 The 'U' in the name is to separate this from d_PRIfldbl so that even
1177 case-blind systems can see the difference.
1179 d_PRIgldbl (longdblfio.U):
1180 This variable conditionally defines the PERL_PRIfldbl symbol, which
1181 indiciates that stdio has a symbol to print long doubles.
1183 d_PRIGUldbl (longdblfio.U):
1184 This variable conditionally defines the PERL_PRIfldbl symbol, which
1185 indiciates that stdio has a symbol to print long doubles.
1186 The 'U' in the name is to separate this from d_PRIgldbl so that even
1187 case-blind systems can see the difference.
1189 d_PRIi64 (quadfio.U):
1190 This variable conditionally defines the PERL_PRIi64 symbol, which
1191 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1193 d_PRIo64 (quadfio.U):
1194 This variable conditionally defines the PERL_PRIo64 symbol, which
1195 indiciates that stdio has a symbol to print 64-bit octal numbers.
1197 d_PRIu64 (quadfio.U):
1198 This variable conditionally defines the PERL_PRIu64 symbol, which
1199 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1202 d_PRIx64 (quadfio.U):
1203 This variable conditionally defines the PERL_PRIx64 symbol, which
1204 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1206 d_PRIXU64 (quadfio.U):
1207 This variable conditionally defines the PERL_PRIXU64 symbol, which
1208 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1209 The 'U' in the name is to separate this from d_PRIx64 so that even
1210 case-blind systems can see the difference.
1212 d_pthread_yield (d_pthread_y.U):
1213 This variable conditionally defines the HAS_PTHREAD_YIELD
1214 symbol if the pthread_yield routine is available to yield
1215 the execution of the current thread.
1218 This variable conditionally defines PWAGE, which indicates
1219 that struct passwd contains pw_age.
1221 d_pwchange (i_pwd.U):
1222 This variable conditionally defines PWCHANGE, which indicates
1223 that struct passwd contains pw_change.
1225 d_pwclass (i_pwd.U):
1226 This variable conditionally defines PWCLASS, which indicates
1227 that struct passwd contains pw_class.
1229 d_pwcomment (i_pwd.U):
1230 This variable conditionally defines PWCOMMENT, which indicates
1231 that struct passwd contains pw_comment.
1233 d_pwexpire (i_pwd.U):
1234 This variable conditionally defines PWEXPIRE, which indicates
1235 that struct passwd contains pw_expire.
1237 d_pwgecos (i_pwd.U):
1238 This variable conditionally defines PWGECOS, which indicates
1239 that struct passwd contains pw_gecos.
1241 d_pwpasswd (i_pwd.U):
1242 This variable conditionally defines PWPASSWD, which indicates
1243 that struct passwd contains pw_passwd.
1245 d_pwquota (i_pwd.U):
1246 This variable conditionally defines PWQUOTA, which indicates
1247 that struct passwd contains pw_quota.
1249 d_qgcvt (d_qgcvt.U):
1250 This variable conditionally defines the HAS_QGCVT symbol, which
1251 indicates to the C program that the qgcvt() routine is available.
1253 d_quad (quadtype.U):
1254 This variable, if defined, tells that there's a 64-bit integer type,
1257 d_readdir (d_readdir.U):
1258 This variable conditionally defines HAS_READDIR if readdir() is
1259 available to read directory entries.
1261 d_readlink (d_readlink.U):
1262 This variable conditionally defines the HAS_READLINK symbol, which
1263 indicates to the C program that the readlink() routine is available
1264 to read the value of a symbolic link.
1266 d_readv (d_readv.U):
1267 This variable conditionally defines the HAS_READV symbol, which
1268 indicates to the C program that the readv() routine is available.
1270 d_recvmsg (d_recvmsg.U):
1271 This variable conditionally defines the HAS_RECVMSG symbol, which
1272 indicates to the C program that the recvmsg() routine is available.
1274 d_rename (d_rename.U):
1275 This variable conditionally defines the HAS_RENAME symbol, which
1276 indicates to the C program that the rename() routine is available
1279 d_rewinddir (d_readdir.U):
1280 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1283 d_rmdir (d_rmdir.U):
1284 This variable conditionally defines HAS_RMDIR if rmdir() is
1285 available to remove directories.
1287 d_safebcpy (d_safebcpy.U):
1288 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1289 the bcopy() routine can do overlapping copies. Normally, you
1290 should probably use memmove().
1292 d_safemcpy (d_safemcpy.U):
1293 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1294 the memcpy() routine can do overlapping copies.
1295 For overlapping copies, memmove() should be used, if available.
1297 d_sanemcmp (d_sanemcmp.U):
1298 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1299 the memcpy() routine is available and can be used to compare relative
1300 magnitudes of chars with their high bits set.
1302 d_sbrkproto (d_sbrkproto.U):
1303 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1304 which indicates to the C program that the system provides
1305 a prototype for the sbrk() function. Otherwise, it is
1306 up to the program to supply one.
1308 d_sched_yield (d_pthread_y.U):
1309 This variable conditionally defines the HAS_SCHED_YIELD
1310 symbol if the sched_yield routine is available to yield
1311 the execution of the current thread.
1313 d_scm_rights (d_socket.U):
1314 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1315 which indicates that the SCM_RIGHTS is available. #ifdef is
1316 not enough because it may be an enum, glibc has been known to do this.
1318 d_SCNfldbl (longdblfio.U):
1319 This variable conditionally defines the PERL_PRIfldbl symbol, which
1320 indiciates that stdio has a symbol to scan long doubles.
1322 d_seekdir (d_readdir.U):
1323 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1326 d_select (d_select.U):
1327 This variable conditionally defines HAS_SELECT if select() is
1328 available to select active file descriptors. A <sys/time.h>
1329 inclusion may be necessary for the timeout field.
1332 This variable conditionally defines the HAS_SEM symbol, which
1333 indicates that the entire sem*(2) library is present.
1335 d_semctl (d_semctl.U):
1336 This variable conditionally defines the HAS_SEMCTL symbol, which
1337 indicates to the C program that the semctl() routine is available.
1339 d_semctl_semid_ds (d_union_semun.U):
1340 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1341 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1343 d_semctl_semun (d_union_semun.U):
1344 This variable conditionally defines USE_SEMCTL_SEMUN, which
1345 indicates that union semun is to be used for semctl IPC_STAT.
1347 d_semget (d_semget.U):
1348 This variable conditionally defines the HAS_SEMGET symbol, which
1349 indicates to the C program that the semget() routine is available.
1351 d_semop (d_semop.U):
1352 This variable conditionally defines the HAS_SEMOP symbol, which
1353 indicates to the C program that the semop() routine is available.
1355 d_sendmsg (d_sendmsg.U):
1356 This variable conditionally defines the HAS_SENDMSG symbol, which
1357 indicates to the C program that the sendmsg() routine is available.
1359 d_setegid (d_setegid.U):
1360 This variable conditionally defines the HAS_SETEGID symbol, which
1361 indicates to the C program that the setegid() routine is available
1362 to change the effective gid of the current program.
1364 d_seteuid (d_seteuid.U):
1365 This variable conditionally defines the HAS_SETEUID symbol, which
1366 indicates to the C program that the seteuid() routine is available
1367 to change the effective uid of the current program.
1369 d_setgrent (d_setgrent.U):
1370 This variable conditionally defines the HAS_SETGRENT symbol, which
1371 indicates to the C program that the setgrent() routine is available
1372 for initializing sequential access to the group database.
1374 d_setgrps (d_setgrps.U):
1375 This variable conditionally defines the HAS_SETGROUPS symbol, which
1376 indicates to the C program that the setgroups() routine is available
1377 to set the list of process groups.
1379 d_sethent (d_sethent.U):
1380 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1383 d_setitimer (d_setitimer.U):
1384 This variable conditionally defines the HAS_SETITIMER symbol, which
1385 indicates to the C program that the setitimer() routine is available.
1387 d_setlinebuf (d_setlnbuf.U):
1388 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1389 indicates to the C program that the setlinebuf() routine is available
1390 to change stderr or stdout from block-buffered or unbuffered to a
1393 d_setlocale (d_setlocale.U):
1394 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1395 available to handle locale-specific ctype implementations.
1397 d_setnent (d_setnent.U):
1398 This variable conditionally defines HAS_SETNETENT if setnetent() is
1401 d_setpent (d_setpent.U):
1402 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1405 d_setpgid (d_setpgid.U):
1406 This variable conditionally defines the HAS_SETPGID symbol if the
1407 setpgid(pid, gpid) function is available to set process group ID.
1409 d_setpgrp2 (d_setpgrp2.U):
1410 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1411 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1412 is available to set the current process group.
1414 d_setpgrp (d_setpgrp.U):
1415 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1416 available to set the current process group.
1418 d_setprior (d_setprior.U):
1419 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1420 is available to set a process's priority.
1422 d_setproctitle (d_setproctitle.U):
1423 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1424 which indicates to the C program that the setproctitle() routine
1427 d_setpwent (d_setpwent.U):
1428 This variable conditionally defines the HAS_SETPWENT symbol, which
1429 indicates to the C program that the setpwent() routine is available
1430 for initializing sequential access to the passwd database.
1432 d_setregid (d_setregid.U):
1433 This variable conditionally defines HAS_SETREGID if setregid() is
1434 available to change the real and effective gid of the current
1437 d_setresgid (d_setregid.U):
1438 This variable conditionally defines HAS_SETRESGID if setresgid() is
1439 available to change the real, effective and saved gid of the current
1442 d_setresuid (d_setreuid.U):
1443 This variable conditionally defines HAS_SETREUID if setresuid() is
1444 available to change the real, effective and saved uid of the current
1447 d_setreuid (d_setreuid.U):
1448 This variable conditionally defines HAS_SETREUID if setreuid() is
1449 available to change the real and effective uid of the current
1452 d_setrgid (d_setrgid.U):
1453 This variable conditionally defines the HAS_SETRGID symbol, which
1454 indicates to the C program that the setrgid() routine is available
1455 to change the real gid of the current program.
1457 d_setruid (d_setruid.U):
1458 This variable conditionally defines the HAS_SETRUID symbol, which
1459 indicates to the C program that the setruid() routine is available
1460 to change the real uid of the current program.
1462 d_setsent (d_setsent.U):
1463 This variable conditionally defines HAS_SETSERVENT if setservent() is
1466 d_setsid (d_setsid.U):
1467 This variable conditionally defines HAS_SETSID if setsid() is
1468 available to set the process group ID.
1470 d_setvbuf (d_setvbuf.U):
1471 This variable conditionally defines the HAS_SETVBUF symbol, which
1472 indicates to the C program that the setvbuf() routine is available
1473 to change buffering on an open stdio stream.
1476 This variable conditionally defines the USE_SFIO symbol,
1477 and indicates whether sfio is available (and should be used).
1480 This variable conditionally defines the HAS_SHM symbol, which
1481 indicates that the entire shm*(2) library is present.
1483 d_shmat (d_shmat.U):
1484 This variable conditionally defines the HAS_SHMAT symbol, which
1485 indicates to the C program that the shmat() routine is available.
1487 d_shmatprototype (d_shmat.U):
1488 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1489 symbol, which indicates that sys/shm.h has a prototype for
1492 d_shmctl (d_shmctl.U):
1493 This variable conditionally defines the HAS_SHMCTL symbol, which
1494 indicates to the C program that the shmctl() routine is available.
1496 d_shmdt (d_shmdt.U):
1497 This variable conditionally defines the HAS_SHMDT symbol, which
1498 indicates to the C program that the shmdt() routine is available.
1500 d_shmget (d_shmget.U):
1501 This variable conditionally defines the HAS_SHMGET symbol, which
1502 indicates to the C program that the shmget() routine is available.
1504 d_sigaction (d_sigaction.U):
1505 This variable conditionally defines the HAS_SIGACTION symbol, which
1506 indicates that the Vr4 sigaction() routine is available.
1508 d_sigprocmask (d_sigprocmask.U):
1509 This variable conditionally defines HAS_SIGPROCMASK
1510 if sigprocmask() is available to examine or change the signal mask
1511 of the calling process.
1513 d_sigsetjmp (d_sigsetjmp.U):
1514 This variable conditionally defines the HAS_SIGSETJMP symbol,
1515 which indicates that the sigsetjmp() routine is available to
1516 call setjmp() and optionally save the process's signal mask.
1518 d_sockatmark (d_sockatmark.U):
1519 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1520 indicates to the C program that the sockatmark() routine is available.
1522 d_sockatmarkproto (d_sockatmarkproto.U):
1523 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1524 which indicates to the C program that the system provides
1525 a prototype for the sockatmark() function. Otherwise, it is
1526 up to the program to supply one.
1528 d_socket (d_socket.U):
1529 This variable conditionally defines HAS_SOCKET, which indicates
1530 that the BSD socket interface is supported.
1532 d_socklen_t (d_socklen_t.U):
1533 This symbol will be defined if the C compiler supports socklen_t.
1535 d_sockpair (d_socket.U):
1536 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1537 indicates that the BSD socketpair() is supported.
1539 d_socks5_init (d_socks5_init.U):
1540 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1541 indicates to the C program that the socks5_init() routine is available.
1543 d_sqrtl (d_sqrtl.U):
1544 This variable conditionally defines the HAS_SQRTL symbol, which
1545 indicates to the C program that the sqrtl() routine is available.
1547 d_sresgproto (d_sresgproto.U):
1548 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1549 which indicates to the C program that the system provides
1550 a prototype for the setresgid() function. Otherwise, it is
1551 up to the program to supply one.
1553 d_sresuproto (d_sresuproto.U):
1554 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1555 which indicates to the C program that the system provides
1556 a prototype for the setresuid() function. Otherwise, it is
1557 up to the program to supply one.
1559 d_statblks (d_statblks.U):
1560 This variable conditionally defines USE_STAT_BLOCKS
1561 if this system has a stat structure declaring
1562 st_blksize and st_blocks.
1564 d_statfs_f_flags (d_statfs_f_flags.U):
1565 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1566 symbol, which indicates to struct statfs from has f_flags member.
1567 This kind of struct statfs is coming from sys/mount.h (BSD),
1568 not from sys/statfs.h (SYSV).
1570 d_statfs_s (d_statfs_s.U):
1571 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1572 which indicates that the struct statfs is supported.
1574 d_statvfs (d_statvfs.U):
1575 This variable conditionally defines the HAS_STATVFS symbol, which
1576 indicates to the C program that the statvfs() routine is available.
1578 d_stdio_cnt_lval (d_stdstdio.U):
1579 This variable conditionally defines STDIO_CNT_LVALUE if the
1580 FILE_cnt macro can be used as an lvalue.
1582 d_stdio_ptr_lval (d_stdstdio.U):
1583 This variable conditionally defines STDIO_PTR_LVALUE if the
1584 FILE_ptr macro can be used as an lvalue.
1586 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1587 This symbol is defined if using the FILE_ptr macro as an lvalue
1588 to increase the pointer by n leaves File_cnt(fp) unchanged.
1590 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1591 This symbol is defined if using the FILE_ptr macro as an lvalue
1592 to increase the pointer by n has the side effect of decreasing the
1593 value of File_cnt(fp) by n.
1595 d_stdio_stream_array (stdio_streams.U):
1596 This variable tells whether there is an array holding
1599 d_stdiobase (d_stdstdio.U):
1600 This variable conditionally defines USE_STDIO_BASE if this system
1601 has a FILE structure declaring a usable _base field (or equivalent)
1604 d_stdstdio (d_stdstdio.U):
1605 This variable conditionally defines USE_STDIO_PTR if this system
1606 has a FILE structure declaring usable _ptr and _cnt fields (or
1607 equivalent) in stdio.h.
1609 d_strchr (d_strchr.U):
1610 This variable conditionally defines HAS_STRCHR if strchr() and
1611 strrchr() are available for string searching.
1613 d_strcoll (d_strcoll.U):
1614 This variable conditionally defines HAS_STRCOLL if strcoll() is
1615 available to compare strings using collating information.
1617 d_strctcpy (d_strctcpy.U):
1618 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1619 indicates to the C program that this C compiler knows how to copy
1622 d_strerrm (d_strerror.U):
1623 This variable holds what Strerrr is defined as to translate an error
1624 code condition into an error message string. It could be 'strerror'
1625 or a more complex macro emulating strrror with sys_errlist[], or the
1626 "unknown" string when both strerror and sys_errlist are missing.
1628 d_strerror (d_strerror.U):
1629 This variable conditionally defines HAS_STRERROR if strerror() is
1630 available to translate error numbers to strings.
1632 d_strftime (d_strftime.U):
1633 This variable conditionally defines the HAS_STRFTIME symbol, which
1634 indicates to the C program that the strftime() routine is available.
1636 d_strtod (d_strtod.U):
1637 This variable conditionally defines the HAS_STRTOD symbol, which
1638 indicates to the C program that the strtod() routine is available
1639 to provide better numeric string conversion than atof().
1641 d_strtol (d_strtol.U):
1642 This variable conditionally defines the HAS_STRTOL symbol, which
1643 indicates to the C program that the strtol() routine is available
1644 to provide better numeric string conversion than atoi() and friends.
1646 d_strtold (d_strtold.U):
1647 This variable conditionally defines the HAS_STRTOLD symbol, which
1648 indicates to the C program that the strtold() routine is available.
1650 d_strtoll (d_strtoll.U):
1651 This variable conditionally defines the HAS_STRTOLL symbol, which
1652 indicates to the C program that the strtoll() routine is available.
1654 d_strtoq (d_strtoq.U):
1655 This variable conditionally defines the HAS_STRTOQ symbol, which
1656 indicates to the C program that the strtoq() routine is available.
1658 d_strtoul (d_strtoul.U):
1659 This variable conditionally defines the HAS_STRTOUL symbol, which
1660 indicates to the C program that the strtoul() routine is available
1661 to provide conversion of strings to unsigned long.
1663 d_strtoull (d_strtoull.U):
1664 This variable conditionally defines the HAS_STRTOULL symbol, which
1665 indicates to the C program that the strtoull() routine is available.
1667 d_strtouq (d_strtouq.U):
1668 This variable conditionally defines the HAS_STRTOUQ symbol, which
1669 indicates to the C program that the strtouq() routine is available.
1671 d_strxfrm (d_strxfrm.U):
1672 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1673 available to transform strings.
1675 d_suidsafe (d_dosuid.U):
1676 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1677 if setuid scripts can be secure. This test looks in /dev/fd/.
1679 d_symlink (d_symlink.U):
1680 This variable conditionally defines the HAS_SYMLINK symbol, which
1681 indicates to the C program that the symlink() routine is available
1682 to create symbolic links.
1684 d_syscall (d_syscall.U):
1685 This variable conditionally defines HAS_SYSCALL if syscall() is
1686 available call arbitrary system calls.
1688 d_syscallproto (d_syscallproto.U):
1689 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1690 which indicates to the C program that the system provides
1691 a prototype for the syscall() function. Otherwise, it is
1692 up to the program to supply one.
1694 d_sysconf (d_sysconf.U):
1695 This variable conditionally defines the HAS_SYSCONF symbol, which
1696 indicates to the C program that the sysconf() routine is available
1697 to determine system related limits and options.
1699 d_sysernlst (d_strerror.U):
1700 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1701 is available to translate error numbers to the symbolic name.
1703 d_syserrlst (d_strerror.U):
1704 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1705 available to translate error numbers to strings.
1707 d_system (d_system.U):
1708 This variable conditionally defines HAS_SYSTEM if system() is
1709 available to issue a shell command.
1711 d_tcgetpgrp (d_tcgtpgrp.U):
1712 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1713 indicates to the C program that the tcgetpgrp() routine is available.
1714 to get foreground process group ID.
1716 d_tcsetpgrp (d_tcstpgrp.U):
1717 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1718 indicates to the C program that the tcsetpgrp() routine is available
1719 to set foreground process group ID.
1721 d_telldir (d_readdir.U):
1722 This variable conditionally defines HAS_TELLDIR if telldir() is
1725 d_telldirproto (d_telldirproto.U):
1726 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1727 which indicates to the C program that the system provides
1728 a prototype for the telldir() function. Otherwise, it is
1729 up to the program to supply one.
1732 This variable conditionally defines the HAS_TIME symbol, which indicates
1733 that the time() routine exists. The time() routine is normaly
1734 provided on UNIX systems.
1736 d_times (d_times.U):
1737 This variable conditionally defines the HAS_TIMES symbol, which indicates
1738 that the times() routine exists. The times() routine is normaly
1739 provided on UNIX systems. You may have to include <sys/times.h>.
1741 d_truncate (d_truncate.U):
1742 This variable conditionally defines HAS_TRUNCATE if truncate() is
1743 available to truncate files.
1745 d_tzname (d_tzname.U):
1746 This variable conditionally defines HAS_TZNAME if tzname[] is
1747 available to access timezone names.
1749 d_u32align (d_u32align.U):
1750 This variable tells whether you must access character data
1751 through U32-aligned pointers.
1753 d_ualarm (d_ualarm.U):
1754 This variable conditionally defines the HAS_UALARM symbol, which
1755 indicates to the C program that the ualarm() routine is available.
1757 d_umask (d_umask.U):
1758 This variable conditionally defines the HAS_UMASK symbol, which
1759 indicates to the C program that the umask() routine is available.
1760 to set and get the value of the file creation mask.
1762 d_uname (d_gethname.U):
1763 This variable conditionally defines the HAS_UNAME symbol, which
1764 indicates to the C program that the uname() routine may be
1765 used to derive the host name.
1767 d_union_semun (d_union_semun.U):
1768 This variable conditionally defines HAS_UNION_SEMUN if the
1769 union semun is defined by including <sys/sem.h>.
1771 d_usleep (d_usleep.U):
1772 This variable conditionally defines HAS_USLEEP if usleep() is
1773 available to do high granularity sleeps.
1775 d_usleepproto (d_usleepproto.U):
1776 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1777 which indicates to the C program that the system provides
1778 a prototype for the usleep() function. Otherwise, it is
1779 up to the program to supply one.
1781 d_ustat (d_ustat.U):
1782 This variable conditionally defines HAS_USTAT if ustat() is
1783 available to query file system statistics by dev_t.
1785 d_vendorarch (vendorarch.U):
1786 This variable conditionally defined PERL_VENDORARCH.
1788 d_vendorbin (vendorbin.U):
1789 This variable conditionally defines PERL_VENDORBIN.
1791 d_vendorlib (vendorlib.U):
1792 This variable conditionally defines PERL_VENDORLIB.
1794 d_vfork (d_vfork.U):
1795 This variable conditionally defines the HAS_VFORK symbol, which
1796 indicates the vfork() routine is available.
1798 d_void_closedir (d_closedir.U):
1799 This variable conditionally defines VOID_CLOSEDIR if closedir()
1800 does not return a value.
1802 d_voidsig (d_voidsig.U):
1803 This variable conditionally defines VOIDSIG if this system
1804 declares "void (*signal(...))()" in signal.h. The old way was to
1805 declare it as "int (*signal(...))()".
1807 d_voidtty (i_sysioctl.U):
1808 This variable conditionally defines USE_IOCNOTTY to indicate that the
1809 ioctl() call with TIOCNOTTY should be used to void tty association.
1810 Otherwise (on USG probably), it is enough to close the standard file
1811 decriptors and do a setpgrp().
1813 d_volatile (d_volatile.U):
1814 This variable conditionally defines the HASVOLATILE symbol, which
1815 indicates to the C program that this C compiler knows about the
1816 volatile declaration.
1818 d_vprintf (d_vprintf.U):
1819 This variable conditionally defines the HAS_VPRINTF symbol, which
1820 indicates to the C program that the vprintf() routine is available
1821 to printf with a pointer to an argument list.
1823 d_wait4 (d_wait4.U):
1824 This variable conditionally defines the HAS_WAIT4 symbol, which
1825 indicates the wait4() routine is available.
1827 d_waitpid (d_waitpid.U):
1828 This variable conditionally defines HAS_WAITPID if waitpid() is
1829 available to wait for child process.
1831 d_wcstombs (d_wcstombs.U):
1832 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1833 indicates to the C program that the wcstombs() routine is available
1834 to convert wide character strings to multibyte strings.
1836 d_wctomb (d_wctomb.U):
1837 This variable conditionally defines the HAS_WCTOMB symbol, which
1838 indicates to the C program that the wctomb() routine is available
1839 to convert a wide character to a multibyte.
1841 d_writev (d_writev.U):
1842 This variable conditionally defines the HAS_WRITEV symbol, which
1843 indicates to the C program that the writev() routine is available.
1846 This variable conditionally defines the symbol XENIX, which alerts
1847 the C program that it runs under Xenix.
1850 This variable is used internally by Configure to determine the
1851 full pathname (if any) of the date program. After Configure runs,
1852 the value is reset to a plain "date" and is not useful.
1854 db_hashtype (i_db.U):
1855 This variable contains the type of the hash structure element
1856 in the <db.h> header file. In older versions of DB, it was
1857 int, while in newer ones it is u_int32_t.
1859 db_prefixtype (i_db.U):
1860 This variable contains the type of the prefix structure element
1861 in the <db.h> header file. In older versions of DB, it was
1862 int, while in newer ones it is size_t.
1864 db_version_major (i_db.U):
1865 This variable contains the major version number of
1866 Berkeley DB found in the <db.h> header file.
1868 db_version_minor (i_db.U):
1869 This variable contains the minor version number of
1870 Berkeley DB found in the <db.h> header file.
1871 For DB version 1 this is always 0.
1873 db_version_patch (i_db.U):
1874 This variable contains the patch version number of
1875 Berkeley DB found in the <db.h> header file.
1876 For DB version 1 this is always 0.
1878 defvoidused (voidflags.U):
1879 This variable contains the default value of the VOIDUSED symbol (15).
1881 direntrytype (i_dirent.U):
1882 This symbol is set to 'struct direct' or 'struct dirent' depending on
1883 whether dirent is available or not. You should use this pseudo type to
1884 portably declare your directory entries.
1887 This variable contains the extension that is to be used for the
1888 dynamically loaded modules that perl generaties.
1891 This variable contains the name of the dynamic loading file that
1892 will be used with the package.
1894 doublesize (doublesize.U):
1895 This variable contains the value of the DOUBLESIZE symbol, which
1896 indicates to the C program how many bytes there are in a double.
1898 drand01 (randfunc.U):
1899 Indicates the macro to be used to generate normalized
1900 random numbers. Uses randfunc, often divided by
1901 (double) (((unsigned long) 1 << randbits)) in order to
1902 normalize the result.
1903 In C programs, the macro 'Drand01' is mapped to drand01.
1905 dynamic_ext (Extensions.U):
1906 This variable holds a list of XS extension files we want to
1907 link dynamically into the package. It is used by Makefile.
1909 eagain (nblock_io.U):
1910 This variable bears the symbolic errno code set by read() when no
1911 data is present on the file and non-blocking I/O was enabled (otherwise,
1912 read() blocks naturally).
1915 This variable conditionally defines EBCDIC if this
1916 system uses EBCDIC encoding. Among other things, this
1917 means that the character ranges are not contiguous.
1921 This variable is used internally by Configure to determine the
1922 full pathname (if any) of the echo program. After Configure runs,
1923 the value is reset to a plain "echo" and is not useful.
1926 This variable is used internally by Configure to determine the
1927 full pathname (if any) of the egrep program. After Configure runs,
1928 the value is reset to a plain "egrep" and is not useful.
1931 This variable is defined but not used by Configure.
1932 The value is a plain '' and is not useful.
1935 When running under Eunice this variable contains a command which will
1936 convert a shell script to the proper form of text file for it to be
1937 executable by the shell. On other systems it is a no-op.
1940 This is an old synonym for _exe.
1943 This variable is used internally by Configure to determine the
1944 full pathname (if any) of the expr program. After Configure runs,
1945 the value is reset to a plain "expr" and is not useful.
1947 extensions (Extensions.U):
1948 This variable holds a list of all extension files (both XS and
1949 non-xs linked into the package. It is propagated to Config.pm
1950 and is typically used to test whether a particular extesion
1953 fflushall (fflushall.U):
1954 This symbol, if defined, tells that to flush
1955 all pending stdio output one must loop through all
1956 the stdio file handles stored in an array and fflush them.
1957 Note that if fflushNULL is defined, fflushall will not
1958 even be probed for and will be left undefined.
1960 fflushNULL (fflushall.U):
1961 This symbol, if defined, tells that fflush(NULL) does flush
1962 all pending stdio output.
1965 This variable is defined but not used by Configure.
1966 The value is a plain '' and is not useful.
1968 firstmakefile (Unix.U):
1969 This variable defines the first file searched by make. On unix,
1970 it is makefile (then Makefile). On case-insensitive systems,
1971 it might be something else. This is only used to deal with
1972 convoluted make depend tricks.
1975 This variable is defined but not used by Configure.
1976 The value is a plain '' and is not useful.
1978 fpossize (fpossize.U):
1979 This variable contains the size of a fpostype in bytes.
1981 fpostype (fpostype.U):
1982 This variable defines Fpos_t to be something like fpos_t, long,
1983 uint, or whatever type is used to declare file positions in libc.
1985 freetype (mallocsrc.U):
1986 This variable contains the return type of free(). It is usually
1987 void, but occasionally int.
1990 This variable contains the command used by Configure
1991 to copy files from the target host. Useful and available
1992 only during Perl build.
1993 The string ':' if not cross-compiling.
1996 This variable contains the full pathname to 'ar', whether or
1997 not the user has specified 'portability'. This is only used
2001 This variable contains the full pathname to 'csh', whether or
2002 not the user has specified 'portability'. This is only used
2003 in the compiled C program, and we assume that all systems which
2004 can share this executable will have the same full pathname to
2007 full_sed (Loc_sed.U):
2008 This variable contains the full pathname to 'sed', whether or
2009 not the user has specified 'portability'. This is only used
2010 in the compiled C program, and we assume that all systems which
2011 can share this executable will have the same full pathname to
2014 gccosandvers (gccvers.U):
2015 If GNU cc (gcc) is used, this variable the operating system and
2016 version used to compile the gcc. It is set to '' if not gcc,
2017 or if nothing useful can be parsed as the os version.
2019 gccversion (gccvers.U):
2020 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2021 indicate whether the compiler is version 1 or 2. This is used in
2022 setting some of the default cflags. It is set to '' if not gcc.
2025 This variable contains the format string used for printing a Gid_t.
2027 gidsign (gidsign.U):
2028 This variable contains the signedness of a gidtype.
2029 1 for unsigned, -1 for signed.
2031 gidsize (gidsize.U):
2032 This variable contains the size of a gidtype in bytes.
2034 gidtype (gidtype.U):
2035 This variable defines Gid_t to be something like gid_t, int,
2036 ushort, or whatever type is used to declare the return type
2037 of getgid(). Typically, it is the type of group ids in the kernel.
2040 This variable holds the general path (space-separated) used to
2041 find libraries. It may contain directories that do not exist on
2042 this platform, libpth is the cleaned-up version.
2045 This variable is used internally by Configure to determine the
2046 full pathname (if any) of the grep program. After Configure runs,
2047 the value is reset to a plain "grep" and is not useful.
2050 This variable contains a command that produces the text of the
2051 /etc/group file. This is normally "cat /etc/group", but can be
2052 "ypcat group" when NIS is used.
2053 On some systems, such as os390, there may be no equivalent
2054 command, in which case this variable is unset.
2056 groupstype (groupstype.U):
2057 This variable defines Groups_t to be something like gid_t, int,
2058 ushort, or whatever type is used for the second argument to
2059 getgroups() and setgroups(). Usually, this is the same as
2060 gidtype (gid_t), but sometimes it isn't.
2063 This variable is used internally by Configure to determine the
2064 full pathname (if any) of the gzip program. After Configure runs,
2065 the value is reset to a plain "gzip" and is not useful.
2067 h_fcntl (h_fcntl.U):
2068 This is variable gets set in various places to tell i_fcntl that
2069 <fcntl.h> should be included.
2071 h_sysfile (h_sysfile.U):
2072 This is variable gets set in various places to tell i_sys_file that
2073 <sys/file.h> should be included.
2076 Gives the type of hints used for previous answers. May be one of
2077 "default", "recommended" or "previous".
2080 This variable contains a command that produces the text of the
2081 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2082 "ypcat hosts" when NIS is used.
2083 On some systems, such as os390, there may be no equivalent
2084 command, in which case this variable is unset.
2087 This variable is the size of an I16 in bytes.
2090 This variable contains the C type used for Perl's I16.
2093 This variable is the size of an I32 in bytes.
2096 This variable contains the C type used for Perl's I32.
2099 This variable is the size of an I64 in bytes.
2102 This variable contains the C type used for Perl's I64.
2105 This variable is the size of an I8 in bytes.
2108 This variable contains the C type used for Perl's I8.
2110 i_arpainet (i_arpainet.U):
2111 This variable conditionally defines the I_ARPA_INET symbol,
2112 and indicates whether a C program should include <arpa/inet.h>.
2114 i_bsdioctl (i_sysioctl.U):
2115 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2116 indicates to the C program that <sys/bsdioctl.h> exists and should
2120 This variable conditionally defines the I_DB symbol, and indicates
2121 whether a C program may include Berkeley's DB include file <db.h>.
2124 This variable conditionally defines the I_DBM symbol, which
2125 indicates to the C program that <dbm.h> exists and should
2128 i_dirent (i_dirent.U):
2129 This variable conditionally defines I_DIRENT, which indicates
2130 to the C program that it should include <dirent.h>.
2133 This variable conditionally defines the I_DLD symbol, which
2134 indicates to the C program that <dld.h> (GNU dynamic loading)
2135 exists and should be included.
2137 i_dlfcn (i_dlfcn.U):
2138 This variable conditionally defines the I_DLFCN symbol, which
2139 indicates to the C program that <dlfcn.h> exists and should
2142 i_fcntl (i_fcntl.U):
2143 This variable controls the value of I_FCNTL (which tells
2144 the C program to include <fcntl.h>).
2146 i_float (i_float.U):
2147 This variable conditionally defines the I_FLOAT symbol, and indicates
2148 whether a C program may include <float.h> to get symbols like DBL_MAX
2149 or DBL_MIN, i.e. machine dependent floating point values.
2152 This variable conditionally defines the I_GDBM symbol, which
2153 indicates to the C program that <gdbm.h> exists and should
2157 This variable conditionally defines the I_GRP symbol, and indicates
2158 whether a C program should include <grp.h>.
2160 i_iconv (i_iconv.U):
2161 This variable conditionally defines the I_ICONV symbol, and indicates
2162 whether a C program should include <iconv.h>.
2164 i_ieeefp (i_ieeefp.U):
2165 This variable conditionally defines the I_IEEEFP symbol, and indicates
2166 whether a C program should include <ieeefp.h>.
2168 i_inttypes (i_inttypes.U):
2169 This variable conditionally defines the I_INTTYPES symbol,
2170 and indicates whether a C program should include <inttypes.h>.
2172 i_langinfo (i_langinfo.U):
2173 This variable conditionally defines the I_LANGINFO symbol,
2174 and indicates whether a C program should include <langinfo.h>.
2176 i_libutil (i_libutil.U):
2177 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2178 whether a C program should include <libutil.h>.
2180 i_limits (i_limits.U):
2181 This variable conditionally defines the I_LIMITS symbol, and indicates
2182 whether a C program may include <limits.h> to get symbols like WORD_BIT
2185 i_locale (i_locale.U):
2186 This variable conditionally defines the I_LOCALE symbol,
2187 and indicates whether a C program should include <locale.h>.
2189 i_machcthr (i_machcthr.U):
2190 This variable conditionally defines the I_MACH_CTHREADS symbol,
2191 and indicates whether a C program should include <mach/cthreads.h>.
2193 i_malloc (i_malloc.U):
2194 This variable conditionally defines the I_MALLOC symbol, and indicates
2195 whether a C program should include <malloc.h>.
2198 This variable conditionally defines the I_MATH symbol, and indicates
2199 whether a C program may include <math.h>.
2201 i_memory (i_memory.U):
2202 This variable conditionally defines the I_MEMORY symbol, and indicates
2203 whether a C program should include <memory.h>.
2205 i_mntent (i_mntent.U):
2206 This variable conditionally defines the I_MNTENT symbol, and indicates
2207 whether a C program should include <mntent.h>.
2210 This variable conditionally defines the I_NDBM symbol, which
2211 indicates to the C program that <ndbm.h> exists and should
2214 i_netdb (i_netdb.U):
2215 This variable conditionally defines the I_NETDB symbol, and indicates
2216 whether a C program should include <netdb.h>.
2218 i_neterrno (i_neterrno.U):
2219 This variable conditionally defines the I_NET_ERRNO symbol, which
2220 indicates to the C program that <net/errno.h> exists and should
2223 i_netinettcp (i_netinettcp.U):
2224 This variable conditionally defines the I_NETINET_TCP symbol,
2225 and indicates whether a C program should include <netinet/tcp.h>.
2228 This variable conditionally defines I_NETINET_IN, which indicates
2229 to the C program that it should include <netinet/in.h>. Otherwise,
2230 you may try <sys/in.h>.
2233 This variable conditionally defines the I_POLL symbol, and indicates
2234 whether a C program should include <poll.h>.
2237 This variable conditionally defines the I_PROT symbol, and indicates
2238 whether a C program should include <prot.h>.
2240 i_pthread (i_pthread.U):
2241 This variable conditionally defines the I_PTHREAD symbol,
2242 and indicates whether a C program should include <pthread.h>.
2245 This variable conditionally defines I_PWD, which indicates
2246 to the C program that it should include <pwd.h>.
2248 i_rpcsvcdbm (i_dbm.U):
2249 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2250 indicates to the C program that <rpcsvc/dbm.h> exists and should
2251 be included. Some System V systems might need this instead of <dbm.h>.
2254 This variable conditionally defines the I_SFIO symbol,
2255 and indicates whether a C program should include <sfio.h>.
2257 i_sgtty (i_termio.U):
2258 This variable conditionally defines the I_SGTTY symbol, which
2259 indicates to the C program that it should include <sgtty.h> rather
2262 i_shadow (i_shadow.U):
2263 This variable conditionally defines the I_SHADOW symbol, and indicates
2264 whether a C program should include <shadow.h>.
2266 i_socks (i_socks.U):
2267 This variable conditionally defines the I_SOCKS symbol, and indicates
2268 whether a C program should include <socks.h>.
2270 i_stdarg (i_varhdr.U):
2271 This variable conditionally defines the I_STDARG symbol, which
2272 indicates to the C program that <stdarg.h> exists and should
2275 i_stddef (i_stddef.U):
2276 This variable conditionally defines the I_STDDEF symbol, which
2277 indicates to the C program that <stddef.h> exists and should
2280 i_stdlib (i_stdlib.U):
2281 This variable conditionally defines the I_STDLIB symbol, which
2282 indicates to the C program that <stdlib.h> exists and should
2285 i_string (i_string.U):
2286 This variable conditionally defines the I_STRING symbol, which
2287 indicates that <string.h> should be included rather than <strings.h>.
2289 i_sunmath (i_sunmath.U):
2290 This variable conditionally defines the I_SUNMATH symbol, and indicates
2291 whether a C program should include <sunmath.h>.
2293 i_sysaccess (i_sysaccess.U):
2294 This variable conditionally defines the I_SYS_ACCESS symbol,
2295 and indicates whether a C program should include <sys/access.h>.
2297 i_sysdir (i_sysdir.U):
2298 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2299 whether a C program should include <sys/dir.h>.
2301 i_sysfile (i_sysfile.U):
2302 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2303 whether a C program should include <sys/file.h> to get R_OK and friends.
2305 i_sysfilio (i_sysioctl.U):
2306 This variable conditionally defines the I_SYS_FILIO symbol, which
2307 indicates to the C program that <sys/filio.h> exists and should
2308 be included in preference to <sys/ioctl.h>.
2311 This variable conditionally defines I_SYS_IN, which indicates
2312 to the C program that it should include <sys/in.h> instead of
2315 i_sysioctl (i_sysioctl.U):
2316 This variable conditionally defines the I_SYS_IOCTL symbol, which
2317 indicates to the C program that <sys/ioctl.h> exists and should
2320 i_syslog (i_syslog.U):
2321 This variable conditionally defines the I_SYSLOG symbol,
2322 and indicates whether a C program should include <syslog.h>.
2324 i_sysmman (i_sysmman.U):
2325 This variable conditionally defines the I_SYS_MMAN symbol, and
2326 indicates whether a C program should include <sys/mman.h>.
2328 i_sysmode (i_sysmode.U):
2329 This variable conditionally defines the I_SYSMODE symbol,
2330 and indicates whether a C program should include <sys/mode.h>.
2332 i_sysmount (i_sysmount.U):
2333 This variable conditionally defines the I_SYSMOUNT symbol,
2334 and indicates whether a C program should include <sys/mount.h>.
2336 i_sysndir (i_sysndir.U):
2337 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2338 whether a C program should include <sys/ndir.h>.
2340 i_sysparam (i_sysparam.U):
2341 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2342 whether a C program should include <sys/param.h>.
2344 i_sysresrc (i_sysresrc.U):
2345 This variable conditionally defines the I_SYS_RESOURCE symbol,
2346 and indicates whether a C program should include <sys/resource.h>.
2348 i_syssecrt (i_syssecrt.U):
2349 This variable conditionally defines the I_SYS_SECURITY symbol,
2350 and indicates whether a C program should include <sys/security.h>.
2352 i_sysselct (i_sysselct.U):
2353 This variable conditionally defines I_SYS_SELECT, which indicates
2354 to the C program that it should include <sys/select.h> in order to
2355 get the definition of struct timeval.
2357 i_syssockio (i_sysioctl.U):
2358 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2359 C program that socket ioctl codes may be found in <sys/sockio.h>
2360 instead of <sys/ioctl.h>.
2362 i_sysstat (i_sysstat.U):
2363 This variable conditionally defines the I_SYS_STAT symbol,
2364 and indicates whether a C program should include <sys/stat.h>.
2366 i_sysstatfs (i_sysstatfs.U):
2367 This variable conditionally defines the I_SYSSTATFS symbol,
2368 and indicates whether a C program should include <sys/statfs.h>.
2370 i_sysstatvfs (i_sysstatvfs.U):
2371 This variable conditionally defines the I_SYSSTATVFS symbol,
2372 and indicates whether a C program should include <sys/statvfs.h>.
2374 i_systime (i_time.U):
2375 This variable conditionally defines I_SYS_TIME, which indicates
2376 to the C program that it should include <sys/time.h>.
2378 i_systimek (i_time.U):
2379 This variable conditionally defines I_SYS_TIME_KERNEL, which
2380 indicates to the C program that it should include <sys/time.h>
2381 with KERNEL defined.
2383 i_systimes (i_systimes.U):
2384 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2385 whether a C program should include <sys/times.h>.
2387 i_systypes (i_systypes.U):
2388 This variable conditionally defines the I_SYS_TYPES symbol,
2389 and indicates whether a C program should include <sys/types.h>.
2391 i_sysuio (i_sysuio.U):
2392 This variable conditionally defines the I_SYSUIO symbol, and indicates
2393 whether a C program should include <sys/uio.h>.
2395 i_sysun (i_sysun.U):
2396 This variable conditionally defines I_SYS_UN, which indicates
2397 to the C program that it should include <sys/un.h> to get UNIX
2398 domain socket definitions.
2400 i_sysutsname (i_sysutsname.U):
2401 This variable conditionally defines the I_SYSUTSNAME symbol,
2402 and indicates whether a C program should include <sys/utsname.h>.
2404 i_sysvfs (i_sysvfs.U):
2405 This variable conditionally defines the I_SYSVFS symbol,
2406 and indicates whether a C program should include <sys/vfs.h>.
2408 i_syswait (i_syswait.U):
2409 This variable conditionally defines I_SYS_WAIT, which indicates
2410 to the C program that it should include <sys/wait.h>.
2412 i_termio (i_termio.U):
2413 This variable conditionally defines the I_TERMIO symbol, which
2414 indicates to the C program that it should include <termio.h> rather
2417 i_termios (i_termio.U):
2418 This variable conditionally defines the I_TERMIOS symbol, which
2419 indicates to the C program that the POSIX <termios.h> file is
2423 This variable conditionally defines I_TIME, which indicates
2424 to the C program that it should include <time.h>.
2426 i_unistd (i_unistd.U):
2427 This variable conditionally defines the I_UNISTD symbol, and indicates
2428 whether a C program should include <unistd.h>.
2430 i_ustat (i_ustat.U):
2431 This variable conditionally defines the I_USTAT symbol, and indicates
2432 whether a C program should include <ustat.h>.
2434 i_utime (i_utime.U):
2435 This variable conditionally defines the I_UTIME symbol, and indicates
2436 whether a C program should include <utime.h>.
2438 i_values (i_values.U):
2439 This variable conditionally defines the I_VALUES symbol, and indicates
2440 whether a C program may include <values.h> to get symbols like MAXLONG
2443 i_varargs (i_varhdr.U):
2444 This variable conditionally defines I_VARARGS, which indicates
2445 to the C program that it should include <varargs.h>.
2447 i_varhdr (i_varhdr.U):
2448 Contains the name of the header to be included to get va_dcl definition.
2449 Typically one of varargs.h or stdarg.h.
2451 i_vfork (i_vfork.U):
2452 This variable conditionally defines the I_VFORK symbol, and indicates
2453 whether a C program should include vfork.h.
2455 ignore_versioned_solibs (libs.U):
2456 This variable should be non-empty if non-versioned shared
2457 libraries (libfoo.so.x.y) are to be ignored (because they
2458 cannot be linked against).
2460 inc_version_list (inc_version_list.U):
2461 This variable specifies the list of subdirectories in over
2462 which perl.c:incpush() and lib/lib.pm will automatically
2463 search when adding directories to @INC. The elements in
2464 the list are separated by spaces. This is only useful
2465 if you have a perl library directory tree structured like the
2466 default one. See INSTALL for how this works. The versioned
2467 site_perl directory was introduced in 5.005, so that is the
2468 lowest possible value.
2470 inc_version_list_init (inc_version_list.U):
2471 This variable holds the same list as inc_version_list, but
2472 each item is enclosed in double quotes and separated by commas,
2473 suitable for use in the PERL_INC_VERSION_LIST initialization.
2476 This variable must preceed the normal include path to get hte
2477 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2478 Value can be "" or "/bsd43" on mips.
2481 This variable is defined but not used by Configure.
2482 The value is a plain '' and is not useful.
2484 installarchlib (archlib.U):
2485 This variable is really the same as archlibexp but may differ on
2486 those systems using AFS. For extra portability, only this variable
2487 should be used in makefiles.
2490 This variable is the same as binexp unless AFS is running in which case
2491 the user is explicitely prompted for it. This variable should always
2492 be used in your makefiles for maximum portability.
2494 installman1dir (man1dir.U):
2495 This variable is really the same as man1direxp, unless you are using
2496 AFS in which case it points to the read/write location whereas
2497 man1direxp only points to the read-only access location. For extra
2498 portability, you should only use this variable within your makefiles.
2500 installman3dir (man3dir.U):
2501 This variable is really the same as man3direxp, unless you are using
2502 AFS in which case it points to the read/write location whereas
2503 man3direxp only points to the read-only access location. For extra
2504 portability, you should only use this variable within your makefiles.
2506 installprefix (installprefix.U):
2507 This variable holds the name of the directory below which
2508 "make install" will install the package. For most users, this
2509 is the same as prefix. However, it is useful for
2510 installing the software into a different (usually temporary)
2511 location after which it can be bundled up and moved somehow
2512 to the final location specified by prefix.
2514 installprefixexp (installprefix.U):
2515 This variable holds the full absolute path of installprefix
2516 with all ~-expansion done.
2518 installprivlib (privlib.U):
2519 This variable is really the same as privlibexp but may differ on
2520 those systems using AFS. For extra portability, only this variable
2521 should be used in makefiles.
2523 installscript (scriptdir.U):
2524 This variable is usually the same as scriptdirexp, unless you are on
2525 a system running AFS, in which case they may differ slightly. You
2526 should always use this variable within your makefiles for portability.
2528 installsitearch (sitearch.U):
2529 This variable is really the same as sitearchexp but may differ on
2530 those systems using AFS. For extra portability, only this variable
2531 should be used in makefiles.
2533 installsitebin (sitebin.U):
2534 This variable is usually the same as sitebinexp, unless you are on
2535 a system running AFS, in which case they may differ slightly. You
2536 should always use this variable within your makefiles for portability.
2538 installsitelib (sitelib.U):
2539 This variable is really the same as sitelibexp but may differ on
2540 those systems using AFS. For extra portability, only this variable
2541 should be used in makefiles.
2543 installstyle (installstyle.U):
2544 This variable describes the "style" of the perl installation.
2545 This is intended to be useful for tools that need to
2546 manipulate entire perl distributions. Perl itself doesn't use
2547 this to find its libraries -- the library directories are
2548 stored directly in Config.pm. Currently, there are only two
2549 styles: "lib" and "lib/perl5". The default library locations
2550 (e.g. privlib, sitelib) are either $prefix/lib or
2551 $prefix/lib/perl5. The former is useful if $prefix is a
2552 directory dedicated to perl (e.g. /opt/perl), while the latter
2553 is useful if $prefix is shared by many packages, e.g. if
2555 This may later be extended to include other information, so
2556 be careful with pattern-matching on the results.
2557 For compatibility with perl5.005 and earlier, the default
2558 setting is based on whether or not $prefix contains the string
2561 installusrbinperl (instubperl.U):
2562 This variable tells whether Perl should be installed also as
2563 /usr/bin/perl in addition to
2566 installvendorarch (vendorarch.U):
2567 This variable is really the same as vendorarchexp but may differ on
2568 those systems using AFS. For extra portability, only this variable
2569 should be used in makefiles.
2571 installvendorbin (vendorbin.U):
2572 This variable is really the same as vendorbinexp but may differ on
2573 those systems using AFS. For extra portability, only this variable
2574 should be used in makefiles.
2576 installvendorlib (vendorlib.U):
2577 This variable is really the same as vendorlibexp but may differ on
2578 those systems using AFS. For extra portability, only this variable
2579 should be used in makefiles.
2581 intsize (intsize.U):
2582 This variable contains the value of the INTSIZE symbol, which
2583 indicates to the C program how many bytes there are in an int.
2585 issymlink (issymlink.U):
2586 This variable holds the test command to test for a symbolic link
2587 (if they are supported). Typical values include 'test -h' and
2590 ivdformat (perlxvf.U):
2591 This variable contains the format string used for printing
2592 a Perl IV as a signed decimal integer.
2595 This variable is the size of an IV in bytes.
2598 This variable contains the C type used for Perl's IV.
2600 known_extensions (Extensions.U):
2601 This variable holds a list of all XS extensions included in
2605 This variable is defined but not used by Configure.
2606 The value is a plain '' and is not useful.
2609 This variable indicates the program to be used to link
2610 libraries for dynamic loading. On some systems, it is 'ld'.
2611 On ELF systems, it should be $cc. Mostly, we'll try to respect
2612 the hint file setting.
2614 lddlflags (dlsrc.U):
2615 This variable contains any special flags that might need to be
2616 passed to $ld to create a shared library suitable for dynamic
2617 loading. It is up to the makefile to use it. For hpux, it
2618 should be '-b'. For sunos 4.1, it is empty.
2620 ldflags (ccflags.U):
2621 This variable contains any additional C loader flags desired by
2622 the user. It is up to the Makefile to use this.
2624 ldflags_uselargefiles (uselfs.U):
2625 This variable contains the loader flags needed by large file builds
2626 and added to ldflags by hints files.
2628 ldlibpthname (libperl.U):
2629 This variable holds the name of the shared library
2630 search path, often LD_LIBRARY_PATH. To get an empty
2631 string, the hints file must set this to 'none'.
2634 This variable is used internally by Configure to determine the
2635 full pathname (if any) of the less program. After Configure runs,
2636 the value is reset to a plain "less" and is not useful.
2639 This is an old synonym for _a.
2642 This variable contains the location of the C library.
2644 libperl (libperl.U):
2645 The perl executable is obtained by linking perlmain.c with
2646 libperl, any static extensions (usually just DynaLoader),
2647 and any other libraries needed on this system. libperl
2648 is usually libperl.a, but can also be libperl.so.xxx if
2649 the user wishes to build a perl executable with a shared
2653 This variable holds the general path (space-separated) used to find
2654 libraries. It is intended to be used by other units.
2657 This variable holds the additional libraries we want to use.
2658 It is up to the Makefile to deal with it.
2661 This variable holds the directory names aka dirnames of the libraries
2662 we found and accepted, duplicates are removed.
2665 This variable holds the filenames aka basenames of the libraries
2666 we found and accepted.
2669 This variable holds the full pathnames of the libraries
2670 we found and accepted.
2673 This variable holds the directory names probed for libraries.
2675 libswanted (Myinit.U):
2676 This variable holds a list of all the libraries we want to
2677 search. The order is chosen to pick up the c library
2678 ahead of ucb or bsd libraries for SVR4.
2680 libswanted_uselargefiles (uselfs.U):
2681 This variable contains the libraries needed by large file builds
2682 and added to ldflags by hints files. It is a space separated list
2683 of the library names without the "lib" prefix or any suffix, just
2687 This variable is defined but not used by Configure.
2688 The value is a plain '' and is not useful.
2691 This variable is defined but not used by Configure.
2692 The value is a plain '' and is not useful.
2694 lkflags (ccflags.U):
2695 This variable contains any additional C partial linker flags desired by
2696 the user. It is up to the Makefile to use this.
2699 This variable is used internally by Configure to determine the
2700 full pathname (if any) of the ln program. After Configure runs,
2701 the value is reset to a plain "ln" and is not useful.
2704 This variable holds the name of the command to make
2705 symbolic links (if they are supported). It can be used
2706 in the Makefile. It is either 'ln -s' or 'ln'
2708 locincpth (ccflags.U):
2709 This variable contains a list of additional directories to be
2710 searched by the compiler. The appropriate '-I' directives will
2711 be added to ccflags. This is intended to simplify setting
2712 local directories from the Configure command line.
2713 It's not much, but it parallels the loclibpth stuff in libpth.U.
2715 loclibpth (libpth.U):
2716 This variable holds the paths (space-separated) used to find local
2717 libraries. It is prepended to libpth, and is intended to be easily
2718 set from the command line.
2720 longdblsize (d_longdbl.U):
2721 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2722 indicates to the C program how many bytes there are in a long double,
2723 if this system supports long doubles.
2725 longlongsize (d_longlong.U):
2726 This variable contains the value of the LONGLONGSIZE symbol, which
2727 indicates to the C program how many bytes there are in a long long,
2728 if this system supports long long.
2730 longsize (intsize.U):
2731 This variable contains the value of the LONGSIZE symbol, which
2732 indicates to the C program how many bytes there are in a long.
2735 This variable is defined but not used by Configure.
2736 The value is a plain '' and is not useful.
2739 This variable is defined but not used by Configure.
2740 The value is a plain '' and is not useful.
2743 This variable is used internally by Configure to determine the
2744 full pathname (if any) of the ls program. After Configure runs,
2745 the value is reset to a plain "ls" and is not useful.
2747 lseeksize (lseektype.U):
2748 This variable defines lseektype to be something like off_t, long,
2749 or whatever type is used to declare lseek offset's type in the
2750 kernel (which also appears to be lseek's return type).
2752 lseektype (lseektype.U):
2753 This variable defines lseektype to be something like off_t, long,
2754 or whatever type is used to declare lseek offset's type in the
2755 kernel (which also appears to be lseek's return type).
2758 This variable is defined but not used by Configure.
2759 The value is a plain '' and is not useful.
2762 This variable is defined but not used by Configure.
2763 The value is a plain '' and is not useful.
2766 This variable is used internally by Configure to determine the
2767 full pathname (if any) of the make program. After Configure runs,
2768 the value is reset to a plain "make" and is not useful.
2770 make_set_make (make.U):
2771 Some versions of 'make' set the variable MAKE. Others do not.
2772 This variable contains the string to be included in Makefile.SH
2773 so that MAKE is set if needed, and not if not needed.
2774 Possible values are:
2775 make_set_make='#' # If your make program handles this for you,
2776 make_set_make="MAKE=$make" # if it doesn't.
2777 I used a comment character so that we can distinguish a
2778 'set' value (from a previous config.sh or Configure '-D' option)
2779 from an uncomputed value.
2781 mallocobj (mallocsrc.U):
2782 This variable contains the name of the malloc.o that this package
2783 generates, if that malloc.o is preferred over the system malloc.
2784 Otherwise the value is null. This variable is intended for generating
2785 Makefiles. See mallocsrc.
2787 mallocsrc (mallocsrc.U):
2788 This variable contains the name of the malloc.c that comes with
2789 the package, if that malloc.c is preferred over the system malloc.
2790 Otherwise the value is null. This variable is intended for generating
2793 malloctype (mallocsrc.U):
2794 This variable contains the kind of ptr returned by malloc and realloc.
2796 man1dir (man1dir.U):
2797 This variable contains the name of the directory in which manual
2798 source pages are to be put. It is the responsibility of the
2799 Makefile.SH to get the value of this into the proper command.
2800 You must be prepared to do the ~name expansion yourself.
2802 man1direxp (man1dir.U):
2803 This variable is the same as the man1dir variable, but is filename
2804 expanded at configuration time, for convenient use in makefiles.
2806 man1ext (man1dir.U):
2807 This variable contains the extension that the manual page should
2808 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2811 man3dir (man3dir.U):
2812 This variable contains the name of the directory in which manual
2813 source pages are to be put. It is the responsibility of the
2814 Makefile.SH to get the value of this into the proper command.
2815 You must be prepared to do the ~name expansion yourself.
2817 man3direxp (man3dir.U):
2818 This variable is the same as the man3dir variable, but is filename
2819 expanded at configuration time, for convenient use in makefiles.
2821 man3ext (man3dir.U):
2822 This variable contains the extension that the manual page should
2823 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2827 This variable is used internally by Configure to determine the
2828 full pathname (if any) of the Mcc program. After Configure runs,
2829 the value is reset to a plain "Mcc" and is not useful.
2831 mips_type (usrinc.U):
2832 This variable holds the environment type for the mips system.
2833 Possible values are "BSD 4.3" and "System V".
2836 This variable is used internally by Configure to determine the
2837 full pathname (if any) of the mkdir program. After Configure runs,
2838 the value is reset to a plain "mkdir" and is not useful.
2840 mmaptype (d_mmap.U):
2841 This symbol contains the type of pointer returned by mmap()
2842 (and simultaneously the type of the first argument).
2843 It can be 'void *' or 'caddr_t'.
2845 modetype (modetype.U):
2846 This variable defines modetype to be something like mode_t,
2847 int, unsigned short, or whatever type is used to declare file
2848 modes for system calls.
2851 This variable is used internally by Configure to determine the
2852 full pathname (if any) of the more program. After Configure runs,
2853 the value is reset to a plain "more" and is not useful.
2855 multiarch (multiarch.U):
2856 This variable conditionally defines the MULTIARCH symbol
2857 which signifies the presence of multiplatform files.
2858 This is normally set by hints files.
2861 This variable is defined but not used by Configure.
2862 The value is a plain '' and is not useful.
2864 myarchname (archname.U):
2865 This variable holds the architecture name computed by Configure in
2866 a previous run. It is not intended to be perused by any user and
2867 should never be set in a hint file.
2869 mydomain (myhostname.U):
2870 This variable contains the eventual value of the MYDOMAIN symbol,
2871 which is the domain of the host the program is going to run on.
2872 The domain must be appended to myhostname to form a complete host name.
2873 The dot comes with mydomain, and need not be supplied by the program.
2875 myhostname (myhostname.U):
2876 This variable contains the eventual value of the MYHOSTNAME symbol,
2877 which is the name of the host the program is going to run on.
2878 The domain is not kept with hostname, but must be gotten from mydomain.
2879 The dot comes with mydomain, and need not be supplied by the program.
2881 myuname (Oldconfig.U):
2882 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2883 pseudo variables assignments in the output are stripped, thank you. The
2884 whole thing is then lower-cased.
2887 This variable contains the '-n' flag if that is what causes the echo
2888 command to suppress newline. Otherwise it is null. Correct usage is
2889 $echo $n "prompt for a question: $c".
2891 need_va_copy (need_va_copy.U):
2892 This symbol, if defined, indicates that the system stores
2893 the variable argument list datatype, va_list, in a format
2894 that cannot be copied by simple assignment, so that some
2895 other means must be used when copying is required.
2896 As such systems vary in their provision (or non-provision)
2897 of copying mechanisms, handy.h defines a platform-
2898 independent macro, Perl_va_copy(src, dst), to do the job.
2900 netdb_hlen_type (netdbtype.U):
2901 This variable holds the type used for the 2nd argument to
2902 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2903 This is only useful if you have gethostbyaddr(), naturally.
2905 netdb_host_type (netdbtype.U):
2906 This variable holds the type used for the 1st argument to
2907 gethostbyaddr(). Usually, this is char * or void *, possibly
2908 with or without a const prefix.
2909 This is only useful if you have gethostbyaddr(), naturally.
2911 netdb_name_type (netdbtype.U):
2912 This variable holds the type used for the argument to
2913 gethostbyname(). Usually, this is char * or const char *.
2914 This is only useful if you have gethostbyname(), naturally.
2916 netdb_net_type (netdbtype.U):
2917 This variable holds the type used for the 1st argument to
2918 getnetbyaddr(). Usually, this is int or long.
2919 This is only useful if you have getnetbyaddr(), naturally.
2922 This variable is used internally by Configure to determine the
2923 full pathname (if any) of the nm program. After Configure runs,
2924 the value is reset to a plain "nm" and is not useful.
2927 This variable holds the options that may be necessary for nm.
2929 nm_so_opt (usenm.U):
2930 This variable holds the options that may be necessary for nm
2931 to work on a shared library but that can not be used on an
2932 archive library. Currently, this is only used by Linux, where
2933 nm --dynamic is *required* to get symbols from an ELF library which
2934 has been stripped, but nm --dynamic is *fatal* on an archive library.
2935 Maybe Linux should just always set usenm=false.
2937 nonxs_ext (Extensions.U):
2938 This variable holds a list of all non-xs extensions included
2939 in the package. All of them will be built.
2942 This variable is used internally by Configure to determine the
2943 full pathname (if any) of the nroff program. After Configure runs,
2944 the value is reset to a plain "nroff" and is not useful.
2946 nveformat (perlxvf.U):
2947 This variable contains the format string used for printing
2948 a Perl NV using %e-ish floating point format.
2950 nvEUformat (perlxvf.U):
2951 This variable contains the format string used for printing
2952 a Perl NV using %E-ish floating point format.
2954 nvfformat (perlxvf.U):
2955 This variable confains the format string used for printing
2956 a Perl NV using %f-ish floating point format.
2958 nvFUformat (perlxvf.U):
2959 This variable confains the format string used for printing
2960 a Perl NV using %F-ish floating point format.
2962 nvgformat (perlxvf.U):
2963 This variable contains the format string used for printing
2964 a Perl NV using %g-ish floating point format.
2966 nvGUformat (perlxvf.U):
2967 This variable contains the format string used for printing
2968 a Perl NV using %G-ish floating point format.
2971 This variable is the size of an NV in bytes.
2974 This variable contains the C type used for Perl's NV.
2976 o_nonblock (nblock_io.U):
2977 This variable bears the symbol value to be used during open() or fcntl()
2978 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2979 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2980 but that is only supported by some devices.
2983 This is an old synonym for _o.
2985 old_pthread_create_joinable (d_pthrattrj.U):
2986 This variable defines the constant to use for creating joinable
2987 (aka undetached) pthreads. Unused if pthread.h defines
2988 PTHREAD_CREATE_JOINABLE. If used, possible values are
2989 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2991 optimize (ccflags.U):
2992 This variable contains any optimizer/debugger flag that should be used.
2993 It is up to the Makefile to use it.
2995 orderlib (orderlib.U):
2996 This variable is "true" if the components of libraries must be ordered
2997 (with `lorder $* | tsort`) before placing them in an archive. Set to
2998 "false" if ranlib or ar can generate random libraries.
3000 osname (Oldconfig.U):
3001 This variable contains the operating system name (e.g. sunos,
3002 solaris, hpux, etc.). It can be useful later on for setting
3003 defaults. Any spaces are replaced with underscores. It is set
3004 to a null string if we can't figure it out.
3006 osvers (Oldconfig.U):
3007 This variable contains the operating system version (e.g.
3008 4.1.3, 5.2, etc.). It is primarily used for helping select
3009 an appropriate hints file, but might be useful elsewhere for
3010 setting defaults. It is set to '' if we can't figure it out.
3011 We try to be flexible about how much of the version number
3012 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3013 same for this package, hints files might just be os_4.0 or
3014 os_4.1, etc., not keeping separate files for each little release.
3016 otherlibdirs (otherlibdirs.U):
3017 This variable contains a colon-separated set of paths for the perl
3018 binary to search for additional library files or modules.
3019 These directories will be tacked to the end of @INC.
3020 Perl will automatically search below each path for version-
3021 and architecture-specific directories. See inc_version_list
3023 A value of ' ' means 'none' and is used to preserve this value
3024 for the next run through Configure.
3026 package (package.U):
3027 This variable contains the name of the package being constructed.
3028 It is primarily intended for the use of later Configure units.
3031 This variable contains the name of the preferred pager on the system.
3032 Usual values are (the full pathnames of) more, less, pg, or cat.
3035 This variable contains a command that produces the text of the
3036 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3037 "ypcat passwd" when NIS is used.
3038 On some systems, such as os390, there may be no equivalent
3039 command, in which case this variable is unset.
3041 patchlevel (patchlevel.U):
3042 The patchlevel level of this package.
3043 The value of patchlevel comes from the patchlevel.h file.
3044 In a version number such as 5.6.1, this is the "6".
3045 In patchlevel.h, this is referred to as "PERL_VERSION".
3048 This is an old synonym for p_ in Head.U, the character
3049 used to separate elements in the command shell search PATH.
3052 This variable contains the full path (if any) to a previously
3053 installed perl5.005 or later suitable for running the script
3054 to determine inc_version_list.
3057 This variable is defined but not used by Configure.
3058 The value is a plain '' and is not useful.
3060 perl_patchlevel (patchlevel.U):
3061 This is the Perl patch level, a numeric change identifier,
3062 as defined by whichever source code maintenance system
3063 is used to maintain the patches; currently Perforce.
3064 It does not correlate with the Perl version numbers or
3065 the maintenance versus development dichotomy except
3066 by also being increasing.
3068 PERL_REVISION (Oldsyms.U):
3069 In a Perl version number such as 5.6.2, this is the 5.
3070 This value is manually set in patchlevel.h
3072 PERL_SUBVERSION (Oldsyms.U):
3073 In a Perl version number such as 5.6.2, this is the 2.
3074 Values greater than 50 represent potentially unstable
3075 development subversions.
3076 This value is manually set in patchlevel.h
3078 PERL_VERSION (Oldsyms.U):
3079 In a Perl version number such as 5.6.2, this is the 6.
3080 This value is manually set in patchlevel.h
3082 perladmin (perladmin.U):
3083 Electronic mail address of the perl5 administrator.
3086 The list of libraries needed by Perl only (any libraries needed
3087 by extensions only will by dropped, if using dynamic loading).
3089 perlpath (perlpath.U):
3090 This variable contains the eventual value of the PERLPATH symbol,
3091 which contains the name of the perl interpreter to be used in
3092 shell scripts and in the "eval 'exec'" idiom.
3095 This variable is used internally by Configure to determine the
3096 full pathname (if any) of the pg program. After Configure runs,
3097 the value is reset to a plain "pg" and is not useful.
3099 phostname (myhostname.U):
3100 This variable contains the eventual value of the PHOSTNAME symbol,
3101 which is a command that can be fed to popen() to get the host name.
3102 The program should probably not presume that the domain is or isn't
3105 pidtype (pidtype.U):
3106 This variable defines PIDTYPE to be something like pid_t, int,
3107 ushort, or whatever type is used to declare process ids in the kernel.
3110 Holds the private path used by Configure to find out the libraries.
3111 Its value is prepend to libpth. This variable takes care of special
3112 machines, like the mips. Usually, it should be empty.
3114 pm_apiversion (xs_apiversion.U):
3115 This variable contains the version of the oldest perl
3116 compatible with the present perl. (That is, pure perl modules
3117 written for $pm_apiversion will still work for the current
3118 version). perl.c:incpush() and lib/lib.pm will automatically
3119 search in $sitelib for older directories across major versions
3120 back to pm_apiversion. This is only useful if you have a perl
3121 library directory tree structured like the default one. The
3122 versioned site_perl library was introduced in 5.005, so that's
3123 the default setting for this variable. It's hard to imagine
3124 it changing before Perl6. It is included here for symmetry
3125 with xs_apiveprsion -- the searching algorithms will
3126 (presumably) be similar.
3127 See the INSTALL file for how this works.
3130 This variable is defined but not used by Configure.
3131 The value is a plain '' and is not useful.
3134 This variable is defined but not used by Configure.
3135 The value is a plain '' and is not useful.
3138 This variable holds the name of the directory below which the
3139 user will install the package. Usually, this is /usr/local, and
3140 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3141 man pages in /usr/local/man, etc. It is only used to set defaults
3142 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3144 prefixexp (prefix.U):
3145 This variable holds the full absolute path of the directory below
3146 which the user will install the package. Derived from prefix.
3148 privlib (privlib.U):
3149 This variable contains the eventual value of the PRIVLIB symbol,
3150 which is the name of the private library for this package. It may
3151 have a ~ on the front. It is up to the makefile to eventually create
3152 this directory while performing installation (with ~ substitution).
3154 privlibexp (privlib.U):
3155 This variable is the ~name expanded version of privlib, so that you
3156 may use it directly in Makefiles or shell scripts.
3158 prototype (prototype.U):
3159 This variable holds the eventual value of CAN_PROTOTYPE, which
3160 indicates the C compiler can handle funciton prototypes.
3162 ptrsize (ptrsize.U):
3163 This variable contains the value of the PTRSIZE symbol, which
3164 indicates to the C program how many bytes there are in a pointer.
3166 quadkind (quadtype.U):
3167 This variable, if defined, encodes the type of a quad:
3168 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3170 quadtype (quadtype.U):
3171 This variable defines Quad_t to be something like long, int,
3172 long long, int64_t, or whatever type is used for 64-bit integers.
3174 randbits (randfunc.U):
3175 Indicates how many bits are produced by the function used to
3176 generate normalized random numbers.
3178 randfunc (randfunc.U):
3179 Indicates the name of the random number function to use.
3180 Values include drand48, random, and rand. In C programs,
3181 the 'Drand01' macro is defined to generate uniformly distributed
3182 random numbers over the range [0., 1.[ (see drand01 and nrand).
3184 randseedtype (randfunc.U):
3185 Indicates the type of the argument of the seedfunc.
3187 ranlib (orderlib.U):
3188 This variable is set to the pathname of the ranlib program, if it is
3189 needed to generate random libraries. Set to ":" if ar can generate
3190 random libraries or if random libraries are not supported
3192 rd_nodata (nblock_io.U):
3193 This variable holds the return code from read() when no data is
3194 present. It should be -1, but some systems return 0 when O_NDELAY is
3195 used, which is a shame because you cannot make the difference between
3196 no data and an EOF.. Sigh!
3198 revision (patchlevel.U):
3199 The value of revision comes from the patchlevel.h file.
3200 In a version number such as 5.6.1, this is the "5".
3201 In patchlevel.h, this is referred to as "PERL_REVISION".
3204 This variable is used internally by Configure to determine the
3205 full pathname (if any) of the rm program. After Configure runs,
3206 the value is reset to a plain "rm" and is not useful.
3209 This variable is defined but not used by Configure.
3210 The value is a plain '' and is not useful.
3213 This variable contains the command used by Configure
3214 to copy and execute a cross-compiled executable in the
3215 target host. Useful and available only during Perl build.
3216 Empty string '' if not cross-compiling.
3219 This variable contains 'true' or 'false' depending whether the
3220 nm extraction should be performed or not, according to the value
3221 of usenm and the flags on the Configure command line.
3223 sched_yield (d_pthread_y.U):
3224 This variable defines the way to yield the execution
3225 of the current thread.
3227 scriptdir (scriptdir.U):
3228 This variable holds the name of the directory in which the user wants
3229 to put publicly scripts for the package in question. It is either
3230 the same directory as for binaries, or a special one that can be
3231 mounted across different architectures, like /usr/share. Programs
3232 must be prepared to deal with ~name expansion.
3234 scriptdirexp (scriptdir.U):
3235 This variable is the same as scriptdir, but is filename expanded
3236 at configuration time, for programs not wanting to bother with it.
3239 This variable is used internally by Configure to determine the
3240 full pathname (if any) of the sed program. After Configure runs,
3241 the value is reset to a plain "sed" and is not useful.
3243 seedfunc (randfunc.U):
3244 Indicates the random number generating seed function.
3245 Values include srand48, srandom, and srand.
3247 selectminbits (selectminbits.U):
3248 This variable holds the minimum number of bits operated by select.
3249 That is, if you do select(n, ...), how many bits at least will be
3250 cleared in the masks if some activity is detected. Usually this
3251 is either n or 32*ceil(n/32), especially many little-endians do
3252 the latter. This is only useful if you have select(), naturally.
3254 selecttype (selecttype.U):
3255 This variable holds the type used for the 2nd, 3rd, and 4th
3256 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3257 is defined, and 'int *' otherwise. This is only useful if you
3258 have select(), naturally.
3261 This variable is defined but not used by Configure.
3262 The value is a plain '' and is not useful.
3265 This variable contains the full pathname of the shell used
3266 on this system to execute Bourne shell scripts. Usually, this will be
3267 /bin/sh, though it's possible that some systems will have /bin/ksh,
3268 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3270 This unit comes before Options.U, so you can't set sh with a '-D'
3271 option, though you can override this (and startsh)
3272 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3275 This variable is defined but not used by Configure.
3276 The value is a plain '' and is not useful.
3278 sharpbang (spitshell.U):
3279 This variable contains the string #! if this system supports that
3282 shmattype (d_shmat.U):
3283 This symbol contains the type of pointer returned by shmat().
3284 It can be 'void *' or 'char *'.
3286 shortsize (intsize.U):
3287 This variable contains the value of the SHORTSIZE symbol which
3288 indicates to the C program how many bytes there are in a short.
3290 shrpenv (libperl.U):
3291 If the user builds a shared libperl.so, then we need to tell the
3292 'perl' executable where it will be able to find the installed libperl.so.
3293 One way to do this on some systems is to set the environment variable
3294 LD_RUN_PATH to the directory that will be the final location of the
3295 shared libperl.so. The makefile can use this with something like
3296 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3298 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3301 See the main perl Makefile.SH for actual working usage.
3302 Alternatively, we might be able to use a command line option such
3303 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3304 $archlibexp/CORE (Linux).
3306 shsharp (spitshell.U):
3307 This variable tells further Configure units whether your sh can
3310 sig_count (sig_name.U):
3311 This variable holds a number larger than the largest valid
3312 signal number. This is usually the same as the NSIG macro.
3314 sig_name (sig_name.U):
3315 This variable holds the signal names, space separated. The leading
3316 SIG in signal name is removed. A ZERO is prepended to the
3317 list. This is currently not used.
3319 sig_name_init (sig_name.U):
3320 This variable holds the signal names, enclosed in double quotes and
3321 separated by commas, suitable for use in the SIG_NAME definition
3322 below. A "ZERO" is prepended to the list, and the list is
3323 terminated with a plain 0. The leading SIG in signal names
3324 is removed. See sig_num.
3326 sig_num (sig_name.U):
3327 This variable holds the signal numbers, space separated. A ZERO is
3328 prepended to the list (corresponding to the fake SIGZERO), and
3329 the list is terminated with a 0. Those numbers correspond to
3330 the value of the signal listed in the same place within the
3333 sig_num_init (sig_name.U):
3334 This variable holds the signal numbers, enclosed in double quotes and
3335 separated by commas, suitable for use in the SIG_NUM definition
3336 below. A "ZERO" is prepended to the list, and the list is
3337 terminated with a plain 0.
3339 sig_size (sig_name.U):
3340 This variable contains the number of elements of the sig_name
3341 and sig_num arrays, excluding the final NULL entry.
3343 signal_t (d_voidsig.U):
3344 This variable holds the type of the signal handler (void or int).
3346 sitearch (sitearch.U):
3347 This variable contains the eventual value of the SITEARCH symbol,
3348 which is the name of the private library for this package. It may
3349 have a ~ on the front. It is up to the makefile to eventually create
3350 this directory while performing installation (with ~ substitution).
3351 The standard distribution will put nothing in this directory.
3352 After perl has been installed, users may install their own local
3353 architecture-dependent modules in this directory with
3354 MakeMaker Makefile.PL
3355 or equivalent. See INSTALL for details.
3357 sitearchexp (sitearch.U):
3358 This variable is the ~name expanded version of sitearch, so that you
3359 may use it directly in Makefiles or shell scripts.
3361 sitebin (sitebin.U):
3362 This variable holds the name of the directory in which the user wants
3363 to put add-on publicly executable files for the package in question. It
3364 is most often a local directory such as /usr/local/bin. Programs using
3365 this variable must be prepared to deal with ~name substitution.
3366 The standard distribution will put nothing in this directory.
3367 After perl has been installed, users may install their own local
3368 executables in this directory with
3369 MakeMaker Makefile.PL
3370 or equivalent. See INSTALL for details.
3372 sitebinexp (sitebin.U):
3373 This is the same as the sitebin variable, but is filename expanded at
3374 configuration time, for use in your makefiles.
3376 sitelib (sitelib.U):
3377 This variable contains the eventual value of the SITELIB symbol,
3378 which is the name of the private library for this package. It may
3379 have a ~ on the front. It is up to the makefile to eventually create
3380 this directory while performing installation (with ~ substitution).
3381 The standard distribution will put nothing in this directory.
3382 After perl has been installed, users may install their own local
3383 architecture-independent modules in this directory with
3384 MakeMaker Makefile.PL
3385 or equivalent. See INSTALL for details.
3387 sitelib_stem (sitelib.U):
3388 This variable is $sitelibexp with any trailing version-specific component
3389 removed. The elements in inc_version_list (inc_version_list.U) can
3390 be tacked onto this variable to generate a list of directories to search.
3392 sitelibexp (sitelib.U):
3393 This variable is the ~name expanded version of sitelib, so that you
3394 may use it directly in Makefiles or shell scripts.
3396 siteprefix (siteprefix.U):
3397 This variable holds the full absolute path of the directory below
3398 which the user will install add-on packages.
3399 See INSTALL for usage and examples.
3401 siteprefixexp (siteprefix.U):
3402 This variable holds the full absolute path of the directory below
3403 which the user will install add-on packages. Derived from siteprefix.
3405 sizesize (sizesize.U):
3406 This variable contains the size of a sizetype in bytes.
3408 sizetype (sizetype.U):
3409 This variable defines sizetype to be something like size_t,
3410 unsigned long, or whatever type is used to declare length
3411 parameters for string functions.
3414 This variable is defined but not used by Configure.
3415 The value is a plain '' and is not useful.
3418 This variable is defined but not used by Configure.
3419 The value is a plain '' and is not useful.
3422 This variable holds the extension used to identify shared libraries
3423 (also known as shared objects) on the system. Usually set to 'so'.
3425 sockethdr (d_socket.U):
3426 This variable has any cpp '-I' flags needed for socket support.
3428 socketlib (d_socket.U):
3429 This variable has the names of any libraries needed for socket support.
3431 socksizetype (socksizetype.U):
3432 This variable holds the type used for the size argument
3433 for various socket calls like accept. Usual values include
3434 socklen_t, size_t, and int.
3437 This variable is used internally by Configure to determine the
3438 full pathname (if any) of the sort program. After Configure runs,
3439 the value is reset to a plain "sort" and is not useful.
3441 spackage (package.U):
3442 This variable contains the name of the package being constructed,
3443 with the first letter uppercased, i.e. suitable for starting
3446 spitshell (spitshell.U):
3447 This variable contains the command necessary to spit out a runnable
3448 shell on this system. It is either cat or a grep '-v' for # comments.
3450 sPRId64 (quadfio.U):
3451 This variable, if defined, contains the string used by stdio to
3452 format 64-bit decimal numbers (format 'd') for output.
3454 sPRIeldbl (longdblfio.U):
3455 This variable, if defined, contains the string used by stdio to
3456 format long doubles (format 'e') for output.
3458 sPRIEUldbl (longdblfio.U):
3459 This variable, if defined, contains the string used by stdio to
3460 format long doubles (format 'E') for output.
3461 The 'U' in the name is to separate this from sPRIeldbl so that even
3462 case-blind systems can see the difference.
3464 sPRIfldbl (longdblfio.U):
3465 This variable, if defined, contains the string used by stdio to
3466 format long doubles (format 'f') for output.
3468 sPRIFUldbl (longdblfio.U):
3469 This variable, if defined, contains the string used by stdio to
3470 format long doubles (format 'F') for output.
3471 The 'U' in the name is to separate this from sPRIfldbl so that even
3472 case-blind systems can see the difference.
3474 sPRIgldbl (longdblfio.U):
3475 This variable, if defined, contains the string used by stdio to
3476 format long doubles (format 'g') for output.
3478 sPRIGUldbl (longdblfio.U):
3479 This variable, if defined, contains the string used by stdio to
3480 format long doubles (format 'G') for output.
3481 The 'U' in the name is to separate this from sPRIgldbl so that even
3482 case-blind systems can see the difference.
3484 sPRIi64 (quadfio.U):
3485 This variable, if defined, contains the string used by stdio to
3486 format 64-bit decimal numbers (format 'i') for output.
3488 sPRIo64 (quadfio.U):
3489 This variable, if defined, contains the string used by stdio to
3490 format 64-bit octal numbers (format 'o') for output.
3492 sPRIu64 (quadfio.U):
3493 This variable, if defined, contains the string used by stdio to
3494 format 64-bit unsigned decimal numbers (format 'u') for output.
3496 sPRIx64 (quadfio.U):
3497 This variable, if defined, contains the string used by stdio to
3498 format 64-bit hexadecimal numbers (format 'x') for output.
3500 sPRIXU64 (quadfio.U):
3501 This variable, if defined, contains the string used by stdio to
3502 format 64-bit hExADECimAl numbers (format 'X') for output.
3503 The 'U' in the name is to separate this from sPRIx64 so that even
3504 case-blind systems can see the difference.
3507 This variable holds the path to the package source. It is up to
3508 the Makefile to use this variable and set VPATH accordingly to
3509 find the sources remotely.
3511 sSCNfldbl (longdblfio.U):
3512 This variable, if defined, contains the string used by stdio to
3513 format long doubles (format 'f') for input.
3515 ssizetype (ssizetype.U):
3516 This variable defines ssizetype to be something like ssize_t,
3517 long or int. It is used by functions that return a count
3518 of bytes or an error condition. It must be a signed type.
3519 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3521 startperl (startperl.U):
3522 This variable contains the string to put on the front of a perl
3523 script to make sure (hopefully) that it runs with perl and not some
3524 shell. Of course, that leading line must be followed by the classical
3526 eval 'exec perl -S $0 ${1+"$@"}'
3527 if $running_under_some_shell;
3528 to guarantee perl startup should the shell execute the script. Note
3529 that this magic incatation is not understood by csh.
3531 startsh (startsh.U):
3532 This variable contains the string to put on the front of a shell
3533 script to make sure (hopefully) that it runs with sh and not some
3536 static_ext (Extensions.U):
3537 This variable holds a list of XS extension files we want to
3538 link statically into the package. It is used by Makefile.
3540 stdchar (stdchar.U):
3541 This variable conditionally defines STDCHAR to be the type of char
3542 used in stdio.h. It has the values "unsigned char" or "char".
3544 stdio_base (d_stdstdio.U):
3545 This variable defines how, given a FILE pointer, fp, to access the
3546 _base field (or equivalent) of stdio.h's FILE structure. This will
3547 be used to define the macro FILE_base(fp).
3549 stdio_bufsiz (d_stdstdio.U):
3550 This variable defines how, given a FILE pointer, fp, to determine
3551 the number of bytes store in the I/O buffer pointer to by the
3552 _base field (or equivalent) of stdio.h's FILE structure. This will
3553 be used to define the macro FILE_bufsiz(fp).
3555 stdio_cnt (d_stdstdio.U):
3556 This variable defines how, given a FILE pointer, fp, to access the
3557 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3558 be used to define the macro FILE_cnt(fp).
3560 stdio_filbuf (d_stdstdio.U):
3561 This variable defines how, given a FILE pointer, fp, to tell
3562 stdio to refill its internal buffers (?). This will
3563 be used to define the macro FILE_filbuf(fp).
3565 stdio_ptr (d_stdstdio.U):
3566 This variable defines how, given a FILE pointer, fp, to access the
3567 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3568 be used to define the macro FILE_ptr(fp).
3570 stdio_stream_array (stdio_streams.U):
3571 This variable tells the name of the array holding the stdio streams.
3572 Usual values include _iob, __iob, and __sF.
3574 strings (i_string.U):
3575 This variable holds the full path of the string header that will be
3576 used. Typically /usr/include/string.h or /usr/include/strings.h.
3579 This variable is defined but not used by Configure.
3580 The value is a plain '' and is not useful.
3582 subversion (patchlevel.U):
3583 The subversion level of this package.
3584 The value of subversion comes from the patchlevel.h file.
3585 In a version number such as 5.6.1, this is the "1".
3586 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3587 This is unique to perl.
3590 This variable holds the place where the manual is located on this
3591 system. It is not the place where the user wants to put his manual
3592 pages. Rather it is the place where Configure may look to find manual
3593 for unix commands (section 1 of the manual usually). See mansrc.
3596 This variable is defined but not used by Configure.
3597 The value is a plain '' and is not useful.
3600 This variable is defined but not used by Configure.
3601 The value is a plain '' and is not useful.
3603 targetarch (Cross.U):
3604 If cross-compiling, this variable contains the target architecture.
3605 If not, this will be empty.
3608 This variable is defined but not used by Configure.
3609 The value is a plain '' and is not useful.
3612 This variable is defined but not used by Configure.
3613 The value is a plain '' and is not useful.
3616 This variable is used internally by Configure to determine the
3617 full pathname (if any) of the test program. After Configure runs,
3618 the value is reset to a plain "test" and is not useful.
3620 timeincl (i_time.U):
3621 This variable holds the full path of the included time header(s).
3623 timetype (d_time.U):
3624 This variable holds the type returned by time(). It can be long,
3625 or time_t on BSD sites (in which case <sys/types.h> should be
3626 included). Anyway, the type Time_t should be used.
3629 This variable contains the command used by Configure
3630 to copy to from the target host. Useful and available
3631 only during Perl build.
3632 The string ':' if not cross-compiling.
3635 This variable is used internally by Configure to determine the
3636 full pathname (if any) of the touch program. After Configure runs,
3637 the value is reset to a plain "touch" and is not useful.
3640 This variable is used internally by Configure to determine the
3641 full pathname (if any) of the tr program. After Configure runs,
3642 the value is reset to a plain "tr" and is not useful.
3645 This variable contains the value to be passed to the tr(1)
3646 command to transliterate a newline. Typical values are
3647 '\012' and '\n'. This is needed for EBCDIC systems where
3648 newline is not necessarily '\012'.
3651 This variable is defined but not used by Configure.
3652 The value is a plain '' and is not useful.
3655 This variable is the size of an U16 in bytes.
3658 This variable contains the C type used for Perl's U16.
3661 This variable is the size of an U32 in bytes.
3664 This variable contains the C type used for Perl's U32.
3667 This variable is the size of an U64 in bytes.
3670 This variable contains the C type used for Perl's U64.
3673 This variable is the size of an U8 in bytes.
3676 This variable contains the C type used for Perl's U8.
3679 This variable contains the format string used for printing a Uid_t.
3681 uidsign (uidsign.U):
3682 This variable contains the signedness of a uidtype.
3683 1 for unsigned, -1 for signed.
3685 uidsize (uidsize.U):
3686 This variable contains the size of a uidtype in bytes.
3688 uidtype (uidtype.U):
3689 This variable defines Uid_t to be something like uid_t, int,
3690 ushort, or whatever type is used to declare user ids in the kernel.
3693 This variable is used internally by Configure to determine the
3694 full pathname (if any) of the uname program. After Configure runs,
3695 the value is reset to a plain "uname" and is not useful.
3698 This variable is used internally by Configure to determine the
3699 full pathname (if any) of the uniq program. After Configure runs,
3700 the value is reset to a plain "uniq" and is not useful.
3702 uquadtype (quadtype.U):
3703 This variable defines Uquad_t to be something like unsigned long,
3704 unsigned int, unsigned long long, uint64_t, or whatever type is
3705 used for 64-bit integers.
3707 use5005threads (usethreads.U):
3708 This variable conditionally defines the USE_5005THREADS symbol,
3709 and indicates that Perl should be built to use the 5.005-based
3710 threading implementation.
3712 use64bitall (use64bits.U):
3713 This variable conditionally defines the USE_64_BIT_ALL symbol,
3714 and indicates that 64-bit integer types should be used
3715 when available. The maximal possible
3716 64-bitness is employed: LP64 or ILP64, meaning that you will
3717 be able to use more than 2 gigabytes of memory. This mode is
3718 even more binary incompatible than USE_64_BIT_INT. You may not
3719 be able to run the resulting executable in a 32-bit CPU at all or
3720 you may need at least to reboot your OS to 64-bit mode.
3722 use64bitint (use64bits.U):
3723 This variable conditionally defines the USE_64_BIT_INT symbol,
3724 and indicates that 64-bit integer types should be used
3725 when available. The minimal possible 64-bitness
3726 is employed, just enough to get 64-bit integers into Perl.
3727 This may mean using for example "long longs", while your memory
3728 may still be limited to 2 gigabytes.
3730 usecrosscompile (Cross.U):
3731 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3732 and indicates that Perl has been cross-compiled.
3735 This variable indicates if the system supports dynamic
3736 loading of some sort. See also dlsrc and dlobj.
3738 useithreads (usethreads.U):
3739 This variable conditionally defines the USE_ITHREADS symbol,
3740 and indicates that Perl should be built to use the interpreter-based
3741 threading implementation.
3743 uselargefiles (uselfs.U):
3744 This variable conditionally defines the USE_LARGE_FILES symbol,
3745 and indicates that large file interfaces should be used when
3748 uselongdouble (uselongdbl.U):
3749 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3750 and indicates that long doubles should be used when available.
3752 usemorebits (usemorebits.U):
3753 This variable conditionally defines the USE_MORE_BITS symbol,
3754 and indicates that explicit 64-bit interfaces and long doubles
3755 should be used when available.
3757 usemultiplicity (usemultiplicity.U):
3758 This variable conditionally defines the MULTIPLICITY symbol,
3759 and indicates that Perl should be built to use multiplicity.
3761 usemymalloc (mallocsrc.U):
3762 This variable contains y if the malloc that comes with this package
3763 is desired over the system's version of malloc. People often include
3764 special versions of malloc for effiency, but such versions are often
3765 less portable. See also mallocsrc and mallocobj.
3766 If this is 'y', then -lmalloc is removed from $libs.
3769 This variable contains 'true' or 'false' depending whether the
3770 nm extraction is wanted or not.
3772 useopcode (Extensions.U):
3773 This variable holds either 'true' or 'false' to indicate
3774 whether the Opcode extension should be used. The sole
3775 use for this currently is to allow an easy mechanism
3776 for users to skip the Opcode extension from the Configure
3779 useperlio (useperlio.U):
3780 This variable conditionally defines the USE_PERLIO symbol,
3781 and indicates that the PerlIO abstraction should be
3784 useposix (Extensions.U):
3785 This variable holds either 'true' or 'false' to indicate
3786 whether the POSIX extension should be used. The sole
3787 use for this currently is to allow an easy mechanism
3788 for hints files to indicate that POSIX will not compile
3789 on a particular system.
3791 usereentrant (usethreads.U):
3792 This variable conditionally defines the USE_REENTRANT_API symbol,
3793 which indicates that the thread code may try to use the various
3794 _r versions of library functions. This is only potentially
3795 meaningful if usethreads is set and is very experimental, it is
3796 not even prompted for.
3799 This variable is set to true when the user agrees to use sfio.
3800 It is set to false when sfio is not available or when the user
3801 explicitely requests not to use sfio. It is here primarily so
3802 that command-line settings can override the auto-detection of
3803 d_sfio without running into a "WHOA THERE".
3805 useshrplib (libperl.U):
3806 This variable is set to 'yes' if the user wishes
3807 to build a shared libperl, and 'no' otherwise.
3809 usesocks (usesocks.U):
3810 This variable conditionally defines the USE_SOCKS symbol,
3811 and indicates that Perl should be built to use SOCKS.
3813 usethreads (usethreads.U):
3814 This variable conditionally defines the USE_THREADS symbol,
3815 and indicates that Perl should be built to use threads.
3817 usevendorprefix (vendorprefix.U):
3818 This variable tells whether the vendorprefix
3819 and consequently other vendor* paths are in use.
3821 usevfork (d_vfork.U):
3822 This variable is set to true when the user accepts to use vfork.
3823 It is set to false when no vfork is available or when the user
3824 explicitely requests not to use vfork.
3827 This variable holds the path of the include files, which is
3828 usually /usr/include. It is mainly used by other Configure units.
3831 This variable is defined but not used by Configure.
3832 The value is a plain '' and is not useful.
3834 uvoformat (perlxvf.U):
3835 This variable contains the format string used for printing
3836 a Perl UV as an unsigned octal integer.
3839 This variable is the size of a UV in bytes.
3842 This variable contains the C type used for Perl's UV.
3844 uvuformat (perlxvf.U):
3845 This variable contains the format string used for printing
3846 a Perl UV as an unsigned decimal integer.
3848 uvxformat (perlxvf.U):
3849 This variable contains the format string used for printing
3850 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3852 uvXUformat (perlxvf.U):
3853 This variable contains the format string used for printing
3854 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3856 vendorarch (vendorarch.U):
3857 This variable contains the value of the PERL_VENDORARCH symbol.
3858 It may have a ~ on the front.
3859 The standard distribution will put nothing in this directory.
3860 Vendors who distribute perl may wish to place their own
3861 architecture-dependent modules and extensions in this directory with
3862 MakeMaker Makefile.PL INSTALLDIRS=vendor
3863 or equivalent. See INSTALL for details.
3865 vendorarchexp (vendorarch.U):
3866 This variable is the ~name expanded version of vendorarch, so that you
3867 may use it directly in Makefiles or shell scripts.
3869 vendorbin (vendorbin.U):
3870 This variable contains the eventual value of the VENDORBIN symbol.
3871 It may have a ~ on the front.
3872 The standard distribution will put nothing in this directory.
3873 Vendors who distribute perl may wish to place additional
3874 binaries in this directory with
3875 MakeMaker Makefile.PL INSTALLDIRS=vendor
3876 or equivalent. See INSTALL for details.
3878 vendorbinexp (vendorbin.U):
3879 This variable is the ~name expanded version of vendorbin, so that you
3880 may use it directly in Makefiles or shell scripts.
3882 vendorlib (vendorlib.U):
3883 This variable contains the eventual value of the VENDORLIB symbol,
3884 which is the name of the private library for this package.
3885 The standard distribution will put nothing in this directory.
3886 Vendors who distribute perl may wish to place their own
3887 modules in this directory with
3888 MakeMaker Makefile.PL INSTALLDIRS=vendor
3889 or equivalent. See INSTALL for details.
3891 vendorlib_stem (vendorlib.U):
3892 This variable is $vendorlibexp with any trailing version-specific component
3893 removed. The elements in inc_version_list (inc_version_list.U) can
3894 be tacked onto this variable to generate a list of directories to search.
3896 vendorlibexp (vendorlib.U):
3897 This variable is the ~name expanded version of vendorlib, so that you
3898 may use it directly in Makefiles or shell scripts.
3900 vendorprefix (vendorprefix.U):
3901 This variable holds the full absolute path of the directory below
3902 which the vendor will install add-on packages.
3903 See INSTALL for usage and examples.
3905 vendorprefixexp (vendorprefix.U):
3906 This variable holds the full absolute path of the directory below
3907 which the vendor will install add-on packages. Derived from vendorprefix.
3909 version (patchlevel.U):
3910 The full version number of this package, such as 5.6.1 (or 5_6_1).
3911 This combines revision, patchlevel, and subversion to get the
3912 full version number, including any possible subversions.
3913 This is suitable for use as a directory name, and hence is
3914 filesystem dependent.
3916 versiononly (versiononly.U):
3917 If set, this symbol indicates that only the version-specific
3918 components of a perl installation should be installed.
3919 This may be useful for making a test installation of a new
3920 version without disturbing the existing installation.
3921 Setting versiononly is equivalent to setting installperl's -v option.
3922 In particular, the non-versioned scripts and programs such as
3923 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3924 (see INSTALL for a more complete list). Nor are the man
3926 Usually, this is undef.
3929 This variable is defined but not used by Configure.
3930 The value is a plain '' and is not useful.
3932 voidflags (voidflags.U):
3933 This variable contains the eventual value of the VOIDFLAGS symbol,
3934 which indicates how much support of the void type is given by this
3935 compiler. See VOIDFLAGS for more info.
3938 This variable holds extra path (space-separated) used to find
3939 libraries on this platform, for example CPU-specific libraries
3940 (on multi-CPU platforms) may be listed here.
3942 xs_apiversion (xs_apiversion.U):
3943 This variable contains the version of the oldest perl binary
3944 compatible with the present perl. perl.c:incpush() and
3945 lib/lib.pm will automatically search in $sitearch for older
3946 directories across major versions back to xs_apiversion.
3947 This is only useful if you have a perl library directory tree
3948 structured like the default one.
3949 See INSTALL for how this works.
3950 The versioned site_perl directory was introduced in 5.005,
3951 so that is the lowest possible value.
3952 Since this can depend on compile time options (such as
3953 bincompat) it is set by Configure. Other non-default sources
3954 of potential incompatibility, such as multiplicity, threads,
3955 debugging, 64bits, sfio, etc., are not checked for currently,
3956 though in principle we could go snooping around in old
3960 This variable holds the name of the compiler compiler we
3961 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3964 This variable contains any additional yacc flags desired by the
3965 user. It is up to the Makefile to use this.
3968 This variable is defined but not used by Configure.
3969 The value is a plain '' and is not useful.
3972 This variable is used internally by Configure to determine the
3973 full pathname (if any) of the zip program. After Configure runs,
3974 the value is reset to a plain "zip" and is not useful.