1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is used internally by Configure to determine the
143 full pathname (if any) of the bison program. After Configure runs,
144 the value is reset to a plain "bison" and is not useful.
147 This variable is used internally by Configure to determine the
148 full pathname (if any) of the byacc program. After Configure runs,
149 the value is reset to a plain "byacc" and is not useful.
151 byteorder (byteorder.U):
152 This variable holds the byte order. In the following, larger digits
153 indicate more significance. The variable byteorder is either 4321
154 on a big-endian machine, or 1234 on a little-endian, or 87654321
155 on a Cray ... or 3412 with weird order !
158 This variable contains the \c string if that is what causes the echo
159 command to suppress newline. Otherwise it is null. Correct usage is
160 $echo $n "prompt for a question: $c".
162 castflags (d_castneg.U):
163 This variable contains a flag that precise difficulties the
164 compiler has casting odd floating values to unsigned long:
166 1 = couldn't cast < 0
167 2 = couldn't cast >= 0x80000000
168 4 = couldn't cast in argument expression list
171 This variable is used internally by Configure to determine the
172 full pathname (if any) of the cat program. After Configure runs,
173 the value is reset to a plain "cat" and is not useful.
176 This variable holds the name of a command to execute a C compiler which
177 can resolve multiple global references that happen to have the same
178 name. Usual values are 'cc' and 'gcc'.
179 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
181 cccdlflags (dlsrc.U):
182 This variable contains any special flags that might need to be
183 passed with 'cc -c' to compile modules to be used to create a shared
184 library that will be used for dynamic loading. For hpux, this
185 should be +z. It is up to the makefile to use it.
188 This variable contains any special flags that might need to be
189 passed to cc to link with a shared library for dynamic loading.
190 It is up to the makefile to use it. For sunos 4.1, it should
194 This variable contains any additional C compiler flags desired by
195 the user. It is up to the Makefile to use this.
197 ccflags_uselargefiles (uselfs.U):
198 This variable contains the compiler flags needed by large file builds
199 and added to ccflags by hints files.
202 This can set either by hints files or by Configure. If using
203 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
204 Some platforms, however, make good use of this by storing the
205 flavor of the C compiler being used here. For example if using
206 the Sun WorkShop suite, ccname will be 'workshop'.
208 ccsymbols (Cppsym.U):
209 The variable contains the symbols defined by the C compiler alone.
210 The symbols defined by cpp or by cc when it calls cpp are not in
211 this list, see cppsymbols and cppccsymbols.
212 The list is a space-separated list of symbol=value tokens.
214 ccversion (Checkcc.U):
215 This can set either by hints files or by Configure. If using
216 a (non-gcc) vendor cc, this variable may contain a version for
220 Login name of the person who ran the Configure script and answered the
221 questions. This is used to tag both config.sh and config_h.SH.
223 cf_email (cf_email.U):
224 Electronic mail address of the person who ran Configure. This can be
225 used by units that require the user's e-mail, like MailList.U.
228 Holds the output of the "date" command when the configuration file was
229 produced. This is used to tag both config.sh and config_h.SH.
231 charsize (charsize.U):
232 This variable contains the value of the CHARSIZE symbol, which
233 indicates to the C program how many bytes there are in a character.
236 This variable is defined but not used by Configure.
237 The value is a plain '' and is not useful.
240 This variable is defined but not used by Configure.
241 The value is a plain '' and is not useful.
244 This variable is defined but not used by Configure.
245 The value is a plain '' and is not useful.
247 clocktype (d_times.U):
248 This variable holds the type returned by times(). It can be long,
249 or clock_t on BSD sites (in which case <sys/types.h> should be
253 This variable is used internally by Configure to determine the
254 full pathname (if any) of the comm program. After Configure runs,
255 the value is reset to a plain "comm" and is not useful.
258 This variable is defined but not used by Configure.
259 The value is a plain '' and is not useful.
261 CONFIGDOTSH (Oldsyms.U):
262 This is set to 'true' in config.sh so that a shell script
263 sourcing config.sh can tell if it has been sourced already.
265 contains (contains.U):
266 This variable holds the command to do a grep with a proper return
267 status. On most sane systems it is simply "grep". On insane systems
268 it is a grep followed by a cat followed by a test. This variable
269 is primarily for the use of other Configure units.
272 This variable is used internally by Configure to determine the
273 full pathname (if any) of the cp program. After Configure runs,
274 the value is reset to a plain "cp" and is not useful.
277 This variable is defined but not used by Configure.
278 The value is a plain '' and is not useful.
281 This variable is used internally by Configure to determine the
282 full pathname (if any) of the cpp program. After Configure runs,
283 the value is reset to a plain "cpp" and is not useful.
285 cpp_stuff (cpp_stuff.U):
286 This variable contains an identification of the catenation mechanism
287 used by the C preprocessor.
289 cppccsymbols (Cppsym.U):
290 The variable contains the symbols defined by the C compiler
291 when it calls cpp. The symbols defined by the cc alone or cpp
292 alone are not in this list, see ccsymbols and cppsymbols.
293 The list is a space-separated list of symbol=value tokens.
295 cppflags (ccflags.U):
296 This variable holds the flags that will be passed to the C pre-
297 processor. It is up to the Makefile to use it.
299 cpplast (cppstdin.U):
300 This variable has the same functionality as cppminus, only it applies
301 to cpprun and not cppstdin.
303 cppminus (cppstdin.U):
304 This variable contains the second part of the string which will invoke
305 the C preprocessor on the standard input and produce to standard
306 output. This variable will have the value "-" if cppstdin needs
307 a minus to specify standard input, otherwise the value is "".
310 This variable contains the command which will invoke a C preprocessor
311 on standard input and put the output to stdout. It is guaranteed not
312 to be a wrapper and may be a null string if no preprocessor can be
313 made directly available. This preprocessor might be different from the
314 one used by the C compiler. Don't forget to append cpplast after the
315 preprocessor options.
317 cppstdin (cppstdin.U):
318 This variable contains the command which will invoke the C
319 preprocessor on standard input and put the output to stdout.
320 It is primarily used by other Configure units that ask about
321 preprocessor symbols.
323 cppsymbols (Cppsym.U):
324 The variable contains the symbols defined by the C preprocessor
325 alone. The symbols defined by cc or by cc when it calls cpp are
326 not in this list, see ccsymbols and cppccsymbols.
327 The list is a space-separated list of symbol=value tokens.
329 crosscompile (crosscompile.U):
330 This variable conditionally defines the CROSSCOMPILE symbol
331 which signifies that the build process is be a cross-compilation.
332 This is normally set by hints files or from Configure command line.
334 cryptlib (d_crypt.U):
335 This variable holds -lcrypt or the path to a libcrypt.a archive if
336 the crypt() function is not defined in the standard C library. It is
337 up to the Makefile to use this.
340 This variable is used internally by Configure to determine the
341 full pathname (if any) of the csh program. After Configure runs,
342 the value is reset to a plain "csh" and is not useful.
344 d__fwalk (d__fwalk.U):
345 This variable conditionally defines HAS__FWALK if _fwalk() is
346 available to apply a function to all the file handles.
348 d_access (d_access.U):
349 This variable conditionally defines HAS_ACCESS if the access() system
350 call is available to check for access permissions using real IDs.
352 d_accessx (d_accessx.U):
353 This variable conditionally defines the HAS_ACCESSX symbol, which
354 indicates to the C program that the accessx() routine is available.
357 This variable conditionally defines the HAS_ALARM symbol, which
358 indicates to the C program that the alarm() routine is available.
360 d_archlib (archlib.U):
361 This variable conditionally defines ARCHLIB to hold the pathname
362 of architecture-dependent library files for $package. If
363 $archlib is the same as $privlib, then this is set to undef.
366 This variable conditionally defines the HAS_ATOLF symbol, which
367 indicates to the C program that the atolf() routine is available.
370 This variable conditionally defines the HAS_ATOLL symbol, which
371 indicates to the C program that the atoll() routine is available.
373 d_attribut (d_attribut.U):
374 This variable conditionally defines HASATTRIBUTE, which
375 indicates the C compiler can check for function attributes,
376 such as printf formats.
379 This variable conditionally defines the HAS_BCMP symbol if
380 the bcmp() routine is available to compare strings.
383 This variable conditionally defines the HAS_BCOPY symbol if
384 the bcopy() routine is available to copy strings.
386 d_bincompat5005 (bincompat5005.U):
387 This variable conditionally defines BINCOMPAT5005 so that embed.h
388 can take special action if this version of Perl should be
389 binary-compatible with Perl 5.005. This is impossible for builds
390 that use features like threads and multiplicity it is always $undef
394 This symbol conditionally defines the symbol BSD when running on a
397 d_bsdgetpgrp (d_getpgrp.U):
398 This variable conditionally defines USE_BSD_GETPGRP if
399 getpgrp needs one arguments whereas USG one needs none.
401 d_bsdsetpgrp (d_setpgrp.U):
402 This variable conditionally defines USE_BSD_SETPGRP if
403 setpgrp needs two arguments whereas USG one needs none.
404 See also d_setpgid for a POSIX interface.
407 This variable conditionally defines the HAS_BZERO symbol if
408 the bzero() routine is available to set memory to 0.
410 d_casti32 (d_casti32.U):
411 This variable conditionally defines CASTI32, which indicates
412 whether the C compiler can cast large floats to 32-bit ints.
414 d_castneg (d_castneg.U):
415 This variable conditionally defines CASTNEG, which indicates
416 wether the C compiler can cast negative float to unsigned.
418 d_charvspr (d_vprintf.U):
419 This variable conditionally defines CHARVSPRINTF if this system
420 has vsprintf returning type (char*). The trend seems to be to
421 declare it as "int vsprintf()".
424 This variable conditionally defines the HAS_CHOWN symbol, which
425 indicates to the C program that the chown() routine is available.
427 d_chroot (d_chroot.U):
428 This variable conditionally defines the HAS_CHROOT symbol, which
429 indicates to the C program that the chroot() routine is available.
431 d_chsize (d_chsize.U):
432 This variable conditionally defines the CHSIZE symbol, which
433 indicates to the C program that the chsize() routine is available
434 to truncate files. You might need a -lx to get this routine.
436 d_closedir (d_closedir.U):
437 This variable conditionally defines HAS_CLOSEDIR if closedir() is
441 This variable conditionally defines the HASCONST symbol, which
442 indicates to the C program that this C compiler knows about the
446 This variable conditionally defines the CRYPT symbol, which
447 indicates to the C program that the crypt() routine is available
448 to encrypt passwords and the like.
451 This variable conditionally defines the CSH symbol, which
452 indicates to the C program that the C-shell exists.
454 d_cuserid (d_cuserid.U):
455 This variable conditionally defines the HAS_CUSERID symbol, which
456 indicates to the C program that the cuserid() routine is available
457 to get character login names.
459 d_dbl_dig (d_dbl_dig.U):
460 This variable conditionally defines d_dbl_dig if this system's
461 header files provide DBL_DIG, which is the number of significant
462 digits in a double precision number.
464 d_difftime (d_difftime.U):
465 This variable conditionally defines the HAS_DIFFTIME symbol, which
466 indicates to the C program that the difftime() routine is available.
468 d_dirnamlen (i_dirent.U):
469 This variable conditionally defines DIRNAMLEN, which indicates
470 to the C program that the length of directory entry names is
471 provided by a d_namelen field.
473 d_dlerror (d_dlerror.U):
474 This variable conditionally defines the HAS_DLERROR symbol, which
475 indicates to the C program that the dlerror() routine is available.
477 d_dlopen (d_dlopen.U):
478 This variable conditionally defines the HAS_DLOPEN symbol, which
479 indicates to the C program that the dlopen() routine is available.
481 d_dlsymun (d_dlsymun.U):
482 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
483 indicates that we need to prepend an underscore to the symbol
484 name before calling dlsym().
486 d_dosuid (d_dosuid.U):
487 This variable conditionally defines the symbol DOSUID, which
488 tells the C program that it should insert setuid emulation code
489 on hosts which have setuid #! scripts disabled.
491 d_drand48proto (d_drand48proto.U):
492 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
493 which indicates to the C program that the system provides
494 a prototype for the drand48() function. Otherwise, it is
495 up to the program to supply one.
498 This variable conditionally defines HAS_DUP2 if dup2() is
499 available to duplicate file descriptors.
501 d_eaccess (d_eaccess.U):
502 This variable conditionally defines the HAS_EACCESS symbol, which
503 indicates to the C program that the eaccess() routine is available.
505 d_endgrent (d_endgrent.U):
506 This variable conditionally defines the HAS_ENDGRENT symbol, which
507 indicates to the C program that the endgrent() routine is available
508 for sequential access of the group database.
510 d_endhent (d_endhent.U):
511 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
512 available to close whatever was being used for host queries.
514 d_endnent (d_endnent.U):
515 This variable conditionally defines HAS_ENDNETENT if endnetent() is
516 available to close whatever was being used for network queries.
518 d_endpent (d_endpent.U):
519 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
520 available to close whatever was being used for protocol queries.
522 d_endpwent (d_endpwent.U):
523 This variable conditionally defines the HAS_ENDPWENT symbol, which
524 indicates to the C program that the endpwent() routine is available
525 for sequential access of the passwd database.
527 d_endsent (d_endsent.U):
528 This variable conditionally defines HAS_ENDSERVENT if endservent() is
529 available to close whatever was being used for service queries.
531 d_eofnblk (nblock_io.U):
532 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
533 when reading from a non-blocking I/O source.
536 This variable conditionally defines the symbols EUNICE and VAX, which
537 alerts the C program that it must deal with ideosyncracies of VMS.
539 d_fchmod (d_fchmod.U):
540 This variable conditionally defines the HAS_FCHMOD symbol, which
541 indicates to the C program that the fchmod() routine is available
542 to change mode of opened files.
544 d_fchown (d_fchown.U):
545 This variable conditionally defines the HAS_FCHOWN symbol, which
546 indicates to the C program that the fchown() routine is available
547 to change ownership of opened files.
550 This variable conditionally defines the HAS_FCNTL symbol, and indicates
551 whether the fcntl() function exists
553 d_fcntl_can_lock (d_fcntl_can_lock.U):
554 This variable conditionally defines the FCNTL_CAN_LOCK symbol
555 and indicates whether file locking with fcntl() works.
557 d_fd_macros (d_fd_set.U):
558 This variable contains the eventual value of the HAS_FD_MACROS symbol,
559 which indicates if your C compiler knows about the macros which
560 manipulate an fd_set.
562 d_fd_set (d_fd_set.U):
563 This variable contains the eventual value of the HAS_FD_SET symbol,
564 which indicates if your C compiler knows about the fd_set typedef.
566 d_fds_bits (d_fd_set.U):
567 This variable contains the eventual value of the HAS_FDS_BITS symbol,
568 which indicates if your fd_set typedef contains the fds_bits member.
569 If you have an fd_set typedef, but the dweebs who installed it did
570 a half-fast job and neglected to provide the macros to manipulate
571 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
573 d_fgetpos (d_fgetpos.U):
574 This variable conditionally defines HAS_FGETPOS if fgetpos() is
575 available to get the file position indicator.
577 d_flexfnam (d_flexfnam.U):
578 This variable conditionally defines the FLEXFILENAMES symbol, which
579 indicates that the system supports filenames longer than 14 characters.
582 This variable conditionally defines HAS_FLOCK if flock() is
583 available to do file locking.
586 This variable conditionally defines the HAS_FORK symbol, which
587 indicates to the C program that the fork() routine is available.
589 d_fpathconf (d_pathconf.U):
590 This variable conditionally defines the HAS_FPATHCONF symbol, which
591 indicates to the C program that the pathconf() routine is available
592 to determine file-system related limits and options associated
593 with a given open file descriptor.
595 d_fpos64_t (d_fpos64_t.U):
596 This symbol will be defined if the C compiler supports fpos64_t.
598 d_frexpl (d_frexpl.U):
599 This variable conditionally defines the HAS_FREXPL symbol, which
600 indicates to the C program that the frexpl() routine is available.
602 d_fs_data_s (d_fs_data_s.U):
603 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
604 which indicates that the struct fs_data is supported.
606 d_fseeko (d_fseeko.U):
607 This variable conditionally defines the HAS_FSEEKO symbol, which
608 indicates to the C program that the fseeko() routine is available.
610 d_fsetpos (d_fsetpos.U):
611 This variable conditionally defines HAS_FSETPOS if fsetpos() is
612 available to set the file position indicator.
614 d_fstatfs (d_fstatfs.U):
615 This variable conditionally defines the HAS_FSTATFS symbol, which
616 indicates to the C program that the fstatfs() routine is available.
618 d_fstatvfs (d_statvfs.U):
619 This variable conditionally defines the HAS_FSTATVFS symbol, which
620 indicates to the C program that the fstatvfs() routine is available.
623 This variable conditionally defines the HAS_FSYNC symbol, which
624 indicates to the C program that the fsync() routine is available.
626 d_ftello (d_ftello.U):
627 This variable conditionally defines the HAS_FTELLO symbol, which
628 indicates to the C program that the ftello() routine is available.
631 This variable conditionally defines the HAS_FTIME symbol, which indicates
632 that the ftime() routine exists. The ftime() routine is basically
633 a sub-second accuracy clock.
635 d_Gconvert (d_gconvert.U):
636 This variable holds what Gconvert is defined as to convert
637 floating point numbers into strings. It could be 'gconvert'
638 or a more complex macro emulating gconvert with gcvt() or sprintf.
640 d_Gconvert='gconvert((x),(n),(t),(b))'
641 d_Gconvert='gcvt((x),(n),(b))'
642 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
644 d_getcwd (d_getcwd.U):
645 This variable conditionally defines the HAS_GETCWD symbol, which
646 indicates to the C program that the getcwd() routine is available
647 to get the current working directory.
649 d_getespwnam (d_getespwnam.U):
650 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
651 available to retrieve enchanced (shadow) password entries by name.
653 d_getfsstat (d_getfsstat.U):
654 This variable conditionally defines the HAS_GETFSSTAT symbol, which
655 indicates to the C program that the getfsstat() routine is available.
657 d_getgrent (d_getgrent.U):
658 This variable conditionally defines the HAS_GETGRENT symbol, which
659 indicates to the C program that the getgrent() routine is available
660 for sequential access of the group database.
662 d_getgrps (d_getgrps.U):
663 This variable conditionally defines the HAS_GETGROUPS symbol, which
664 indicates to the C program that the getgroups() routine is available
665 to get the list of process groups.
667 d_gethbyaddr (d_gethbyad.U):
668 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
669 indicates to the C program that the gethostbyaddr() routine is available
670 to look up hosts by their IP addresses.
672 d_gethbyname (d_gethbynm.U):
673 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
674 indicates to the C program that the gethostbyname() routine is available
675 to look up host names in some data base or other.
677 d_gethent (d_gethent.U):
678 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
679 available to look up host names in some data base or another.
681 d_gethname (d_gethname.U):
682 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
683 indicates to the C program that the gethostname() routine may be
684 used to derive the host name.
686 d_gethostprotos (d_gethostprotos.U):
687 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
688 which indicates to the C program that <netdb.h> supplies
689 prototypes for the various gethost*() functions.
690 See also netdbtype.U for probing for various netdb types.
692 d_getlogin (d_getlogin.U):
693 This variable conditionally defines the HAS_GETLOGIN symbol, which
694 indicates to the C program that the getlogin() routine is available
695 to get the login name.
697 d_getmnt (d_getmnt.U):
698 This variable conditionally defines the HAS_GETMNT symbol, which
699 indicates to the C program that the getmnt() routine is available
700 to retrieve one or more mount info blocks by filename.
702 d_getmntent (d_getmntent.U):
703 This variable conditionally defines the HAS_GETMNTENT symbol, which
704 indicates to the C program that the getmntent() routine is available
705 to iterate through mounted files to get their mount info.
707 d_getnbyaddr (d_getnbyad.U):
708 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
709 indicates to the C program that the getnetbyaddr() routine is available
710 to look up networks by their IP addresses.
712 d_getnbyname (d_getnbynm.U):
713 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
714 indicates to the C program that the getnetbyname() routine is available
715 to look up networks by their names.
717 d_getnent (d_getnent.U):
718 This variable conditionally defines HAS_GETNETENT if getnetent() is
719 available to look up network names in some data base or another.
721 d_getnetprotos (d_getnetprotos.U):
722 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
723 which indicates to the C program that <netdb.h> supplies
724 prototypes for the various getnet*() functions.
725 See also netdbtype.U for probing for various netdb types.
727 d_getpagsz (d_getpagsz.U):
728 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
729 is available to get the system page size.
731 d_getpbyname (d_getprotby.U):
732 This variable conditionally defines the HAS_GETPROTOBYNAME
733 symbol, which indicates to the C program that the
734 getprotobyname() routine is available to look up protocols
737 d_getpbynumber (d_getprotby.U):
738 This variable conditionally defines the HAS_GETPROTOBYNUMBER
739 symbol, which indicates to the C program that the
740 getprotobynumber() routine is available to look up protocols
743 d_getpent (d_getpent.U):
744 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
745 available to look up protocols in some data base or another.
747 d_getpgid (d_getpgid.U):
748 This variable conditionally defines the HAS_GETPGID symbol, which
749 indicates to the C program that the getpgid(pid) function
750 is available to get the process group id.
752 d_getpgrp2 (d_getpgrp2.U):
753 This variable conditionally defines the HAS_GETPGRP2 symbol, which
754 indicates to the C program that the getpgrp2() (as in DG/UX) routine
755 is available to get the current process group.
757 d_getpgrp (d_getpgrp.U):
758 This variable conditionally defines HAS_GETPGRP if getpgrp() is
759 available to get the current process group.
761 d_getppid (d_getppid.U):
762 This variable conditionally defines the HAS_GETPPID symbol, which
763 indicates to the C program that the getppid() routine is available
764 to get the parent process ID.
766 d_getprior (d_getprior.U):
767 This variable conditionally defines HAS_GETPRIORITY if getpriority()
768 is available to get a process's priority.
770 d_getprotoprotos (d_getprotoprotos.U):
771 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
772 which indicates to the C program that <netdb.h> supplies
773 prototypes for the various getproto*() functions.
774 See also netdbtype.U for probing for various netdb types.
776 d_getprpwnam (d_getprpwnam.U):
777 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
778 available to retrieve protected (shadow) password entries by name.
780 d_getpwent (d_getpwent.U):
781 This variable conditionally defines the HAS_GETPWENT symbol, which
782 indicates to the C program that the getpwent() routine is available
783 for sequential access of the passwd database.
785 d_getsbyname (d_getsrvby.U):
786 This variable conditionally defines the HAS_GETSERVBYNAME
787 symbol, which indicates to the C program that the
788 getservbyname() routine is available to look up services
791 d_getsbyport (d_getsrvby.U):
792 This variable conditionally defines the HAS_GETSERVBYPORT
793 symbol, which indicates to the C program that the
794 getservbyport() routine is available to look up services
797 d_getsent (d_getsent.U):
798 This variable conditionally defines HAS_GETSERVENT if getservent() is
799 available to look up network services in some data base or another.
801 d_getservprotos (d_getservprotos.U):
802 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
803 which indicates to the C program that <netdb.h> supplies
804 prototypes for the various getserv*() functions.
805 See also netdbtype.U for probing for various netdb types.
807 d_getspnam (d_getspnam.U):
808 This variable conditionally defines HAS_GETSPNAM if getspnam() is
809 available to retrieve SysV shadow password entries by name.
811 d_gettimeod (d_ftime.U):
812 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
813 indicates that the gettimeofday() system call exists (to obtain a
814 sub-second accuracy clock). You should probably include <sys/resource.h>.
816 d_gnulibc (d_gnulibc.U):
817 Defined if we're dealing with the GNU C Library.
819 d_grpasswd (i_grp.U):
820 This variable conditionally defines GRPASSWD, which indicates
821 that struct group in <grp.h> contains gr_passwd.
823 d_hasmntopt (d_hasmntopt.U):
824 This variable conditionally defines the HAS_HASMNTOPT symbol, which
825 indicates to the C program that the hasmntopt() routine is available
826 to query the mount options of file systems.
829 This variable conditionally defines HAS_HTONL if htonl() and its
830 friends are available to do network order byte swapping.
833 This variable conditionally defines the HAS_ICONV symbol, which
834 indicates to the C program that the iconv() routine is available.
836 d_index (d_strchr.U):
837 This variable conditionally defines HAS_INDEX if index() and
838 rindex() are available for string searching.
840 d_inetaton (d_inetaton.U):
841 This variable conditionally defines the HAS_INET_ATON symbol, which
842 indicates to the C program that the inet_aton() function is available
843 to parse IP address "dotted-quad" strings.
845 d_int64_t (d_int64_t.U):
846 This symbol will be defined if the C compiler supports int64_t.
848 d_isascii (d_isascii.U):
849 This variable conditionally defines the HAS_ISASCII constant,
850 which indicates to the C program that isascii() is available.
853 This variable conditionally defines the HAS_ISNAN symbol, which
854 indicates to the C program that the isnan() routine is available.
856 d_isnanl (d_isnanl.U):
857 This variable conditionally defines the HAS_ISNANL symbol, which
858 indicates to the C program that the isnanl() routine is available.
860 d_killpg (d_killpg.U):
861 This variable conditionally defines the HAS_KILLPG symbol, which
862 indicates to the C program that the killpg() routine is available
863 to kill process groups.
865 d_lchown (d_lchown.U):
866 This variable conditionally defines the HAS_LCHOWN symbol, which
867 indicates to the C program that the lchown() routine is available
868 to operate on a symbolic link (instead of following the link).
870 d_ldbl_dig (d_ldbl_dig.U):
871 This variable conditionally defines d_ldbl_dig if this system's
872 header files provide LDBL_DIG, which is the number of significant
873 digits in a long double precision number.
876 This variable conditionally defines HAS_LINK if link() is
877 available to create hard links.
879 d_locconv (d_locconv.U):
880 This variable conditionally defines HAS_LOCALECONV if localeconv() is
881 available for numeric and monetary formatting conventions.
884 This variable conditionally defines HAS_LOCKF if lockf() is
885 available to do file locking.
887 d_longdbl (d_longdbl.U):
888 This variable conditionally defines HAS_LONG_DOUBLE if
889 the long double type is supported.
891 d_longlong (d_longlong.U):
892 This variable conditionally defines HAS_LONG_LONG if
893 the long long type is supported.
895 d_lseekproto (d_lseekproto.U):
896 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
897 which indicates to the C program that the system provides
898 a prototype for the lseek() function. Otherwise, it is
899 up to the program to supply one.
902 This variable conditionally defines HAS_LSTAT if lstat() is
903 available to do file stats on symbolic links.
905 d_madvise (d_madvise.U):
906 This variable conditionally defines HAS_MADVISE if madvise() is
907 available to map a file into memory.
910 This variable conditionally defines the HAS_MBLEN symbol, which
911 indicates to the C program that the mblen() routine is available
912 to find the number of bytes in a multibye character.
914 d_mbstowcs (d_mbstowcs.U):
915 This variable conditionally defines the HAS_MBSTOWCS symbol, which
916 indicates to the C program that the mbstowcs() routine is available
917 to convert a multibyte string into a wide character string.
919 d_mbtowc (d_mbtowc.U):
920 This variable conditionally defines the HAS_MBTOWC symbol, which
921 indicates to the C program that the mbtowc() routine is available
922 to convert multibyte to a wide character.
924 d_memchr (d_memchr.U):
925 This variable conditionally defines the HAS_MEMCHR symbol, which
926 indicates to the C program that the memchr() routine is available
927 to locate characters within a C string.
929 d_memcmp (d_memcmp.U):
930 This variable conditionally defines the HAS_MEMCMP symbol, which
931 indicates to the C program that the memcmp() routine is available
932 to compare blocks of memory.
934 d_memcpy (d_memcpy.U):
935 This variable conditionally defines the HAS_MEMCPY symbol, which
936 indicates to the C program that the memcpy() routine is available
937 to copy blocks of memory.
939 d_memmove (d_memmove.U):
940 This variable conditionally defines the HAS_MEMMOVE symbol, which
941 indicates to the C program that the memmove() routine is available
942 to copy potentatially overlapping blocks of memory.
944 d_memset (d_memset.U):
945 This variable conditionally defines the HAS_MEMSET symbol, which
946 indicates to the C program that the memset() routine is available
947 to set blocks of memory.
950 This variable conditionally defines the HAS_MKDIR symbol, which
951 indicates to the C program that the mkdir() routine is available
952 to create directories..
954 d_mkdtemp (d_mkdtemp.U):
955 This variable conditionally defines the HAS_MKDTEMP symbol, which
956 indicates to the C program that the mkdtemp() routine is available
957 to exclusively create a uniquely named temporary directory.
959 d_mkfifo (d_mkfifo.U):
960 This variable conditionally defines the HAS_MKFIFO symbol, which
961 indicates to the C program that the mkfifo() routine is available.
963 d_mkstemp (d_mkstemp.U):
964 This variable conditionally defines the HAS_MKSTEMP symbol, which
965 indicates to the C program that the mkstemp() routine is available
966 to exclusively create and open a uniquely named temporary file.
968 d_mkstemps (d_mkstemps.U):
969 This variable conditionally defines the HAS_MKSTEMPS symbol, which
970 indicates to the C program that the mkstemps() routine is available
971 to exclusively create and open a uniquely named (with a suffix)
974 d_mktime (d_mktime.U):
975 This variable conditionally defines the HAS_MKTIME symbol, which
976 indicates to the C program that the mktime() routine is available.
979 This variable conditionally defines HAS_MMAP if mmap() is
980 available to map a file into memory.
983 This variable conditionally defines the HAS_MODFL symbol, which
984 indicates to the C program that the modfl() routine is available.
986 d_mprotect (d_mprotect.U):
987 This variable conditionally defines HAS_MPROTECT if mprotect() is
988 available to modify the access protection of a memory mapped file.
991 This variable conditionally defines the HAS_MSG symbol, which
992 indicates that the entire msg*(2) library is present.
994 d_msg_ctrunc (d_socket.U):
995 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
996 which indicates that the MSG_CTRUNC is available. #ifdef is
997 not enough because it may be an enum, glibc has been known to do this.
999 d_msg_dontroute (d_socket.U):
1000 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1001 which indicates that the MSG_DONTROUTE is available. #ifdef is
1002 not enough because it may be an enum, glibc has been known to do this.
1004 d_msg_oob (d_socket.U):
1005 This variable conditionally defines the HAS_MSG_OOB symbol,
1006 which indicates that the MSG_OOB is available. #ifdef is
1007 not enough because it may be an enum, glibc has been known to do this.
1009 d_msg_peek (d_socket.U):
1010 This variable conditionally defines the HAS_MSG_PEEK symbol,
1011 which indicates that the MSG_PEEK is available. #ifdef is
1012 not enough because it may be an enum, glibc has been known to do this.
1014 d_msg_proxy (d_socket.U):
1015 This variable conditionally defines the HAS_MSG_PROXY symbol,
1016 which indicates that the MSG_PROXY is available. #ifdef is
1017 not enough because it may be an enum, glibc has been known to do this.
1019 d_msgctl (d_msgctl.U):
1020 This variable conditionally defines the HAS_MSGCTL symbol, which
1021 indicates to the C program that the msgctl() routine is available.
1023 d_msgget (d_msgget.U):
1024 This variable conditionally defines the HAS_MSGGET symbol, which
1025 indicates to the C program that the msgget() routine is available.
1027 d_msgrcv (d_msgrcv.U):
1028 This variable conditionally defines the HAS_MSGRCV symbol, which
1029 indicates to the C program that the msgrcv() routine is available.
1031 d_msgsnd (d_msgsnd.U):
1032 This variable conditionally defines the HAS_MSGSND symbol, which
1033 indicates to the C program that the msgsnd() routine is available.
1035 d_msync (d_msync.U):
1036 This variable conditionally defines HAS_MSYNC if msync() is
1037 available to synchronize a mapped file.
1039 d_munmap (d_munmap.U):
1040 This variable conditionally defines HAS_MUNMAP if munmap() is
1041 available to unmap a region mapped by mmap().
1043 d_mymalloc (mallocsrc.U):
1044 This variable conditionally defines MYMALLOC in case other parts
1045 of the source want to take special action if MYMALLOC is used.
1046 This may include different sorts of profiling or error detection.
1049 This variable conditionally defines the HAS_NICE symbol, which
1050 indicates to the C program that the nice() routine is available.
1052 d_nv_preserves_uv (perlxv.U):
1053 This variable indicates whether a variable of type nvtype
1054 can preserve all the bits a variable of type uvtype.
1056 d_nv_preserves_uv_bits (perlxv.U):
1057 This variable indicates how many of bits type uvtype
1058 a variable nvtype can preserve.
1060 d_off64_t (d_off64_t.U):
1061 This symbol will be defined if the C compiler supports off64_t.
1063 d_old_pthread_create_joinable (d_pthrattrj.U):
1064 This variable conditionally defines pthread_create_joinable.
1065 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1067 d_oldpthreads (usethreads.U):
1068 This variable conditionally defines the OLD_PTHREADS_API symbol,
1069 and indicates that Perl should be built to use the old
1070 draft POSIX threads API. This is only potentially meaningful if
1073 d_oldsock (d_socket.U):
1074 This variable conditionally defines the OLDSOCKET symbol, which
1075 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1077 d_open3 (d_open3.U):
1078 This variable conditionally defines the HAS_OPEN3 manifest constant,
1079 which indicates to the C program that the 3 argument version of
1080 the open(2) function is available.
1082 d_pathconf (d_pathconf.U):
1083 This variable conditionally defines the HAS_PATHCONF symbol, which
1084 indicates to the C program that the pathconf() routine is available
1085 to determine file-system related limits and options associated
1086 with a given filename.
1088 d_pause (d_pause.U):
1089 This variable conditionally defines the HAS_PAUSE symbol, which
1090 indicates to the C program that the pause() routine is available
1091 to suspend a process until a signal is received.
1093 d_perl_otherlibdirs (otherlibdirs.U):
1094 This variable conditionally defines PERL_OTHERLIBDIRS, which
1095 contains a colon-separated set of paths for the perl binary to
1096 include in @INC. See also otherlibdirs.
1098 d_phostname (d_gethname.U):
1099 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1100 contains the shell command which, when fed to popen(), may be
1101 used to derive the host name.
1104 This variable conditionally defines the HAS_PIPE symbol, which
1105 indicates to the C program that the pipe() routine is available
1106 to create an inter-process channel.
1109 This variable conditionally defines the HAS_POLL symbol, which
1110 indicates to the C program that the poll() routine is available
1111 to poll active file descriptors.
1113 d_portable (d_portable.U):
1114 This variable conditionally defines the PORTABLE symbol, which
1115 indicates to the C program that it should not assume that it is
1116 running on the machine it was compiled on.
1118 d_PRId64 (quadfio.U):
1119 This variable conditionally defines the PERL_PRId64 symbol, which
1120 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1122 d_PRIeldbl (longdblfio.U):
1123 This variable conditionally defines the PERL_PRIfldbl symbol, which
1124 indiciates that stdio has a symbol to print long doubles.
1126 d_PRIEUldbl (longdblfio.U):
1127 This variable conditionally defines the PERL_PRIfldbl symbol, which
1128 indiciates that stdio has a symbol to print long doubles.
1129 The 'U' in the name is to separate this from d_PRIeldbl so that even
1130 case-blind systems can see the difference.
1132 d_PRIfldbl (longdblfio.U):
1133 This variable conditionally defines the PERL_PRIfldbl symbol, which
1134 indiciates that stdio has a symbol to print long doubles.
1136 d_PRIFUldbl (longdblfio.U):
1137 This variable conditionally defines the PERL_PRIfldbl symbol, which
1138 indiciates that stdio has a symbol to print long doubles.
1139 The 'U' in the name is to separate this from d_PRIfldbl so that even
1140 case-blind systems can see the difference.
1142 d_PRIgldbl (longdblfio.U):
1143 This variable conditionally defines the PERL_PRIfldbl symbol, which
1144 indiciates that stdio has a symbol to print long doubles.
1146 d_PRIGUldbl (longdblfio.U):
1147 This variable conditionally defines the PERL_PRIfldbl symbol, which
1148 indiciates that stdio has a symbol to print long doubles.
1149 The 'U' in the name is to separate this from d_PRIgldbl so that even
1150 case-blind systems can see the difference.
1152 d_PRIi64 (quadfio.U):
1153 This variable conditionally defines the PERL_PRIi64 symbol, which
1154 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1156 d_PRIo64 (quadfio.U):
1157 This variable conditionally defines the PERL_PRIo64 symbol, which
1158 indiciates that stdio has a symbol to print 64-bit octal numbers.
1160 d_PRIu64 (quadfio.U):
1161 This variable conditionally defines the PERL_PRIu64 symbol, which
1162 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1165 d_PRIx64 (quadfio.U):
1166 This variable conditionally defines the PERL_PRIx64 symbol, which
1167 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1169 d_PRIXU64 (quadfio.U):
1170 This variable conditionally defines the PERL_PRIXU64 symbol, which
1171 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1172 The 'U' in the name is to separate this from d_PRIx64 so that even
1173 case-blind systems can see the difference.
1175 d_pthread_yield (d_pthread_y.U):
1176 This variable conditionally defines the HAS_PTHREAD_YIELD
1177 symbol if the pthread_yield routine is available to yield
1178 the execution of the current thread.
1181 This variable conditionally defines PWAGE, which indicates
1182 that struct passwd contains pw_age.
1184 d_pwchange (i_pwd.U):
1185 This variable conditionally defines PWCHANGE, which indicates
1186 that struct passwd contains pw_change.
1188 d_pwclass (i_pwd.U):
1189 This variable conditionally defines PWCLASS, which indicates
1190 that struct passwd contains pw_class.
1192 d_pwcomment (i_pwd.U):
1193 This variable conditionally defines PWCOMMENT, which indicates
1194 that struct passwd contains pw_comment.
1196 d_pwexpire (i_pwd.U):
1197 This variable conditionally defines PWEXPIRE, which indicates
1198 that struct passwd contains pw_expire.
1200 d_pwgecos (i_pwd.U):
1201 This variable conditionally defines PWGECOS, which indicates
1202 that struct passwd contains pw_gecos.
1204 d_pwpasswd (i_pwd.U):
1205 This variable conditionally defines PWPASSWD, which indicates
1206 that struct passwd contains pw_passwd.
1208 d_pwquota (i_pwd.U):
1209 This variable conditionally defines PWQUOTA, which indicates
1210 that struct passwd contains pw_quota.
1212 d_qgcvt (d_qgcvt.U):
1213 This variable conditionally defines the HAS_QGCVT symbol, which
1214 indicates to the C program that the qgcvt() routine is available.
1216 d_quad (quadtype.U):
1217 This variable, if defined, tells that there's a 64-bit integer type,
1220 d_readdir (d_readdir.U):
1221 This variable conditionally defines HAS_READDIR if readdir() is
1222 available to read directory entries.
1224 d_readlink (d_readlink.U):
1225 This variable conditionally defines the HAS_READLINK symbol, which
1226 indicates to the C program that the readlink() routine is available
1227 to read the value of a symbolic link.
1229 d_rename (d_rename.U):
1230 This variable conditionally defines the HAS_RENAME symbol, which
1231 indicates to the C program that the rename() routine is available
1234 d_rewinddir (d_readdir.U):
1235 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1238 d_rmdir (d_rmdir.U):
1239 This variable conditionally defines HAS_RMDIR if rmdir() is
1240 available to remove directories.
1242 d_safebcpy (d_safebcpy.U):
1243 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1244 the bcopy() routine can do overlapping copies.
1246 d_safemcpy (d_safemcpy.U):
1247 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1248 the memcpy() routine can do overlapping copies.
1250 d_sanemcmp (d_sanemcmp.U):
1251 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1252 the memcpy() routine is available and can be used to compare relative
1253 magnitudes of chars with their high bits set.
1255 d_sbrkproto (d_sbrkproto.U):
1256 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1257 which indicates to the C program that the system provides
1258 a prototype for the sbrk() function. Otherwise, it is
1259 up to the program to supply one.
1261 d_sched_yield (d_pthread_y.U):
1262 This variable conditionally defines the HAS_SCHED_YIELD
1263 symbol if the sched_yield routine is available to yield
1264 the execution of the current thread.
1266 d_scm_rights (d_socket.U):
1267 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1268 which indicates that the SCM_RIGHTS is available. #ifdef is
1269 not enough because it may be an enum, glibc has been known to do this.
1271 d_SCNfldbl (longdblfio.U):
1272 This variable conditionally defines the PERL_PRIfldbl symbol, which
1273 indiciates that stdio has a symbol to scan long doubles.
1275 d_seekdir (d_readdir.U):
1276 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1279 d_select (d_select.U):
1280 This variable conditionally defines HAS_SELECT if select() is
1281 available to select active file descriptors. A <sys/time.h>
1282 inclusion may be necessary for the timeout field.
1285 This variable conditionally defines the HAS_SEM symbol, which
1286 indicates that the entire sem*(2) library is present.
1288 d_semctl (d_semctl.U):
1289 This variable conditionally defines the HAS_SEMCTL symbol, which
1290 indicates to the C program that the semctl() routine is available.
1292 d_semctl_semid_ds (d_union_semun.U):
1293 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1294 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1296 d_semctl_semun (d_union_semun.U):
1297 This variable conditionally defines USE_SEMCTL_SEMUN, which
1298 indicates that union semun is to be used for semctl IPC_STAT.
1300 d_semget (d_semget.U):
1301 This variable conditionally defines the HAS_SEMGET symbol, which
1302 indicates to the C program that the semget() routine is available.
1304 d_semop (d_semop.U):
1305 This variable conditionally defines the HAS_SEMOP symbol, which
1306 indicates to the C program that the semop() routine is available.
1308 d_setegid (d_setegid.U):
1309 This variable conditionally defines the HAS_SETEGID symbol, which
1310 indicates to the C program that the setegid() routine is available
1311 to change the effective gid of the current program.
1313 d_seteuid (d_seteuid.U):
1314 This variable conditionally defines the HAS_SETEUID symbol, which
1315 indicates to the C program that the seteuid() routine is available
1316 to change the effective uid of the current program.
1318 d_setgrent (d_setgrent.U):
1319 This variable conditionally defines the HAS_SETGRENT symbol, which
1320 indicates to the C program that the setgrent() routine is available
1321 for initializing sequential access to the group database.
1323 d_setgrps (d_setgrps.U):
1324 This variable conditionally defines the HAS_SETGROUPS symbol, which
1325 indicates to the C program that the setgroups() routine is available
1326 to set the list of process groups.
1328 d_sethent (d_sethent.U):
1329 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1332 d_setlinebuf (d_setlnbuf.U):
1333 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1334 indicates to the C program that the setlinebuf() routine is available
1335 to change stderr or stdout from block-buffered or unbuffered to a
1338 d_setlocale (d_setlocale.U):
1339 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1340 available to handle locale-specific ctype implementations.
1342 d_setnent (d_setnent.U):
1343 This variable conditionally defines HAS_SETNETENT if setnetent() is
1346 d_setpent (d_setpent.U):
1347 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1350 d_setpgid (d_setpgid.U):
1351 This variable conditionally defines the HAS_SETPGID symbol if the
1352 setpgid(pid, gpid) function is available to set process group ID.
1354 d_setpgrp2 (d_setpgrp2.U):
1355 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1356 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1357 is available to set the current process group.
1359 d_setpgrp (d_setpgrp.U):
1360 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1361 available to set the current process group.
1363 d_setprior (d_setprior.U):
1364 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1365 is available to set a process's priority.
1367 d_setproctitle (d_setproctitle.U):
1368 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1369 which indicates to the C program that the setproctitle() routine
1372 d_setpwent (d_setpwent.U):
1373 This variable conditionally defines the HAS_SETPWENT symbol, which
1374 indicates to the C program that the setpwent() routine is available
1375 for initializing sequential access to the passwd database.
1377 d_setregid (d_setregid.U):
1378 This variable conditionally defines HAS_SETREGID if setregid() is
1379 available to change the real and effective gid of the current
1382 d_setresgid (d_setregid.U):
1383 This variable conditionally defines HAS_SETRESGID if setresgid() is
1384 available to change the real, effective and saved gid of the current
1387 d_setresuid (d_setreuid.U):
1388 This variable conditionally defines HAS_SETREUID if setresuid() is
1389 available to change the real, effective and saved uid of the current
1392 d_setreuid (d_setreuid.U):
1393 This variable conditionally defines HAS_SETREUID if setreuid() is
1394 available to change the real and effective uid of the current
1397 d_setrgid (d_setrgid.U):
1398 This variable conditionally defines the HAS_SETRGID symbol, which
1399 indicates to the C program that the setrgid() routine is available
1400 to change the real gid of the current program.
1402 d_setruid (d_setruid.U):
1403 This variable conditionally defines the HAS_SETRUID symbol, which
1404 indicates to the C program that the setruid() routine is available
1405 to change the real uid of the current program.
1407 d_setsent (d_setsent.U):
1408 This variable conditionally defines HAS_SETSERVENT if setservent() is
1411 d_setsid (d_setsid.U):
1412 This variable conditionally defines HAS_SETSID if setsid() is
1413 available to set the process group ID.
1415 d_setvbuf (d_setvbuf.U):
1416 This variable conditionally defines the HAS_SETVBUF symbol, which
1417 indicates to the C program that the setvbuf() routine is available
1418 to change buffering on an open stdio stream.
1421 This variable conditionally defines the USE_SFIO symbol,
1422 and indicates whether sfio is available (and should be used).
1425 This variable conditionally defines the HAS_SHM symbol, which
1426 indicates that the entire shm*(2) library is present.
1428 d_shmat (d_shmat.U):
1429 This variable conditionally defines the HAS_SHMAT symbol, which
1430 indicates to the C program that the shmat() routine is available.
1432 d_shmatprototype (d_shmat.U):
1433 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1434 symbol, which indicates that sys/shm.h has a prototype for
1437 d_shmctl (d_shmctl.U):
1438 This variable conditionally defines the HAS_SHMCTL symbol, which
1439 indicates to the C program that the shmctl() routine is available.
1441 d_shmdt (d_shmdt.U):
1442 This variable conditionally defines the HAS_SHMDT symbol, which
1443 indicates to the C program that the shmdt() routine is available.
1445 d_shmget (d_shmget.U):
1446 This variable conditionally defines the HAS_SHMGET symbol, which
1447 indicates to the C program that the shmget() routine is available.
1449 d_sigaction (d_sigaction.U):
1450 This variable conditionally defines the HAS_SIGACTION symbol, which
1451 indicates that the Vr4 sigaction() routine is available.
1453 d_sigprocmask (d_sigprocmask.U):
1454 This variable conditionally defines HAS_SIGPROCMASK
1455 if sigprocmask() is available to examine or change the signal mask
1456 of the calling process.
1458 d_sigsetjmp (d_sigsetjmp.U):
1459 This variable conditionally defines the HAS_SIGSETJMP symbol,
1460 which indicates that the sigsetjmp() routine is available to
1461 call setjmp() and optionally save the process's signal mask.
1463 d_socket (d_socket.U):
1464 This variable conditionally defines HAS_SOCKET, which indicates
1465 that the BSD socket interface is supported.
1467 d_socklen_t (d_socklen_t.U):
1468 This symbol will be defined if the C compiler supports socklen_t.
1470 d_sockpair (d_socket.U):
1471 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1472 indicates that the BSD socketpair() is supported.
1474 d_socks5_init (d_socks5_init.U):
1475 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1476 indicates to the C program that the socks5_init() routine is available.
1478 d_sqrtl (d_sqrtl.U):
1479 This variable conditionally defines the HAS_SQRTL symbol, which
1480 indicates to the C program that the sqrtl() routine is available.
1482 d_statblks (d_statblks.U):
1483 This variable conditionally defines USE_STAT_BLOCKS
1484 if this system has a stat structure declaring
1485 st_blksize and st_blocks.
1487 d_statfs_f_flags (d_statfs_f_flags.U):
1488 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1489 symbol, which indicates to struct statfs from has f_flags member.
1490 This kind of struct statfs is coming from sys/mount.h (BSD),
1491 not from sys/statfs.h (SYSV).
1493 d_statfs_s (d_statfs_s.U):
1494 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1495 which indicates that the struct statfs is supported.
1497 d_statvfs (d_statvfs.U):
1498 This variable conditionally defines the HAS_STATVFS symbol, which
1499 indicates to the C program that the statvfs() routine is available.
1501 d_stdio_cnt_lval (d_stdstdio.U):
1502 This variable conditionally defines STDIO_CNT_LVALUE if the
1503 FILE_cnt macro can be used as an lvalue.
1505 d_stdio_ptr_lval (d_stdstdio.U):
1506 This variable conditionally defines STDIO_PTR_LVALUE if the
1507 FILE_ptr macro can be used as an lvalue.
1509 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1510 This symbol is defined if using the FILE_ptr macro as an lvalue
1511 to increase the pointer by n leaves File_cnt(fp) unchanged.
1513 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1514 This symbol is defined if using the FILE_ptr macro as an lvalue
1515 to increase the pointer by n has the side effect of decreasing the
1516 value of File_cnt(fp) by n.
1518 d_stdio_stream_array (stdio_streams.U):
1519 This variable tells whether there is an array holding
1522 d_stdiobase (d_stdstdio.U):
1523 This variable conditionally defines USE_STDIO_BASE if this system
1524 has a FILE structure declaring a usable _base field (or equivalent)
1527 d_stdstdio (d_stdstdio.U):
1528 This variable conditionally defines USE_STDIO_PTR if this system
1529 has a FILE structure declaring usable _ptr and _cnt fields (or
1530 equivalent) in stdio.h.
1532 d_strchr (d_strchr.U):
1533 This variable conditionally defines HAS_STRCHR if strchr() and
1534 strrchr() are available for string searching.
1536 d_strcoll (d_strcoll.U):
1537 This variable conditionally defines HAS_STRCOLL if strcoll() is
1538 available to compare strings using collating information.
1540 d_strctcpy (d_strctcpy.U):
1541 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1542 indicates to the C program that this C compiler knows how to copy
1545 d_strerrm (d_strerror.U):
1546 This variable holds what Strerrr is defined as to translate an error
1547 code condition into an error message string. It could be 'strerror'
1548 or a more complex macro emulating strrror with sys_errlist[], or the
1549 "unknown" string when both strerror and sys_errlist are missing.
1551 d_strerror (d_strerror.U):
1552 This variable conditionally defines HAS_STRERROR if strerror() is
1553 available to translate error numbers to strings.
1555 d_strtod (d_strtod.U):
1556 This variable conditionally defines the HAS_STRTOD symbol, which
1557 indicates to the C program that the strtod() routine is available
1558 to provide better numeric string conversion than atof().
1560 d_strtol (d_strtol.U):
1561 This variable conditionally defines the HAS_STRTOL symbol, which
1562 indicates to the C program that the strtol() routine is available
1563 to provide better numeric string conversion than atoi() and friends.
1565 d_strtold (d_strtold.U):
1566 This variable conditionally defines the HAS_STRTOLD symbol, which
1567 indicates to the C program that the strtold() routine is available.
1569 d_strtoll (d_strtoll.U):
1570 This variable conditionally defines the HAS_STRTOLL symbol, which
1571 indicates to the C program that the strtoll() routine is available.
1573 d_strtoq (d_strtoq.U):
1574 This variable conditionally defines the HAS_STRTOQ symbol, which
1575 indicates to the C program that the strtoq() routine is available.
1577 d_strtoul (d_strtoul.U):
1578 This variable conditionally defines the HAS_STRTOUL symbol, which
1579 indicates to the C program that the strtoul() routine is available
1580 to provide conversion of strings to unsigned long.
1582 d_strtoull (d_strtoull.U):
1583 This variable conditionally defines the HAS_STRTOULL symbol, which
1584 indicates to the C program that the strtoull() routine is available.
1586 d_strtouq (d_strtouq.U):
1587 This variable conditionally defines the HAS_STRTOUQ symbol, which
1588 indicates to the C program that the strtouq() routine is available.
1590 d_strxfrm (d_strxfrm.U):
1591 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1592 available to transform strings.
1594 d_suidsafe (d_dosuid.U):
1595 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1596 if setuid scripts can be secure. This test looks in /dev/fd/.
1598 d_symlink (d_symlink.U):
1599 This variable conditionally defines the HAS_SYMLINK symbol, which
1600 indicates to the C program that the symlink() routine is available
1601 to create symbolic links.
1603 d_syscall (d_syscall.U):
1604 This variable conditionally defines HAS_SYSCALL if syscall() is
1605 available call arbitrary system calls.
1607 d_sysconf (d_sysconf.U):
1608 This variable conditionally defines the HAS_SYSCONF symbol, which
1609 indicates to the C program that the sysconf() routine is available
1610 to determine system related limits and options.
1612 d_sysernlst (d_strerror.U):
1613 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1614 is available to translate error numbers to the symbolic name.
1616 d_syserrlst (d_strerror.U):
1617 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1618 available to translate error numbers to strings.
1620 d_system (d_system.U):
1621 This variable conditionally defines HAS_SYSTEM if system() is
1622 available to issue a shell command.
1624 d_tcgetpgrp (d_tcgtpgrp.U):
1625 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1626 indicates to the C program that the tcgetpgrp() routine is available.
1627 to get foreground process group ID.
1629 d_tcsetpgrp (d_tcstpgrp.U):
1630 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1631 indicates to the C program that the tcsetpgrp() routine is available
1632 to set foreground process group ID.
1634 d_telldir (d_readdir.U):
1635 This variable conditionally defines HAS_TELLDIR if telldir() is
1638 d_telldirproto (d_telldirproto.U):
1639 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1640 which indicates to the C program that the system provides
1641 a prototype for the telldir() function. Otherwise, it is
1642 up to the program to supply one.
1645 This variable conditionally defines the HAS_TIME symbol, which indicates
1646 that the time() routine exists. The time() routine is normaly
1647 provided on UNIX systems.
1649 d_times (d_times.U):
1650 This variable conditionally defines the HAS_TIMES symbol, which indicates
1651 that the times() routine exists. The times() routine is normaly
1652 provided on UNIX systems. You may have to include <sys/times.h>.
1654 d_truncate (d_truncate.U):
1655 This variable conditionally defines HAS_TRUNCATE if truncate() is
1656 available to truncate files.
1658 d_tzname (d_tzname.U):
1659 This variable conditionally defines HAS_TZNAME if tzname[] is
1660 available to access timezone names.
1662 d_umask (d_umask.U):
1663 This variable conditionally defines the HAS_UMASK symbol, which
1664 indicates to the C program that the umask() routine is available.
1665 to set and get the value of the file creation mask.
1667 d_uname (d_gethname.U):
1668 This variable conditionally defines the HAS_UNAME symbol, which
1669 indicates to the C program that the uname() routine may be
1670 used to derive the host name.
1672 d_union_semun (d_union_semun.U):
1673 This variable conditionally defines HAS_UNION_SEMUN if the
1674 union semun is defined by including <sys/sem.h>.
1676 d_ustat (d_ustat.U):
1677 This variable conditionally defines HAS_USTAT if ustat() is
1678 available to query file system statistics by dev_t.
1680 d_vendorarch (vendorarch.U):
1681 This variable conditionally defined PERL_VENDORARCH.
1683 d_vendorbin (vendorbin.U):
1684 This variable conditionally defines PERL_VENDORBIN.
1686 d_vendorlib (vendorlib.U):
1687 This variable conditionally defines PERL_VENDORLIB.
1689 d_vfork (d_vfork.U):
1690 This variable conditionally defines the HAS_VFORK symbol, which
1691 indicates the vfork() routine is available.
1693 d_void_closedir (d_closedir.U):
1694 This variable conditionally defines VOID_CLOSEDIR if closedir()
1695 does not return a value.
1697 d_voidsig (d_voidsig.U):
1698 This variable conditionally defines VOIDSIG if this system
1699 declares "void (*signal(...))()" in signal.h. The old way was to
1700 declare it as "int (*signal(...))()".
1702 d_voidtty (i_sysioctl.U):
1703 This variable conditionally defines USE_IOCNOTTY to indicate that the
1704 ioctl() call with TIOCNOTTY should be used to void tty association.
1705 Otherwise (on USG probably), it is enough to close the standard file
1706 decriptors and do a setpgrp().
1708 d_volatile (d_volatile.U):
1709 This variable conditionally defines the HASVOLATILE symbol, which
1710 indicates to the C program that this C compiler knows about the
1711 volatile declaration.
1713 d_vprintf (d_vprintf.U):
1714 This variable conditionally defines the HAS_VPRINTF symbol, which
1715 indicates to the C program that the vprintf() routine is available
1716 to printf with a pointer to an argument list.
1718 d_wait4 (d_wait4.U):
1719 This variable conditionally defines the HAS_WAIT4 symbol, which
1720 indicates the wait4() routine is available.
1722 d_waitpid (d_waitpid.U):
1723 This variable conditionally defines HAS_WAITPID if waitpid() is
1724 available to wait for child process.
1726 d_wcstombs (d_wcstombs.U):
1727 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1728 indicates to the C program that the wcstombs() routine is available
1729 to convert wide character strings to multibyte strings.
1731 d_wctomb (d_wctomb.U):
1732 This variable conditionally defines the HAS_WCTOMB symbol, which
1733 indicates to the C program that the wctomb() routine is available
1734 to convert a wide character to a multibyte.
1737 This variable conditionally defines the symbol XENIX, which alerts
1738 the C program that it runs under Xenix.
1741 This variable is used internally by Configure to determine the
1742 full pathname (if any) of the date program. After Configure runs,
1743 the value is reset to a plain "date" and is not useful.
1745 db_hashtype (i_db.U):
1746 This variable contains the type of the hash structure element
1747 in the <db.h> header file. In older versions of DB, it was
1748 int, while in newer ones it is u_int32_t.
1750 db_prefixtype (i_db.U):
1751 This variable contains the type of the prefix structure element
1752 in the <db.h> header file. In older versions of DB, it was
1753 int, while in newer ones it is size_t.
1755 defvoidused (voidflags.U):
1756 This variable contains the default value of the VOIDUSED symbol (15).
1758 direntrytype (i_dirent.U):
1759 This symbol is set to 'struct direct' or 'struct dirent' depending on
1760 whether dirent is available or not. You should use this pseudo type to
1761 portably declare your directory entries.
1764 This variable contains the extension that is to be used for the
1765 dynamically loaded modules that perl generaties.
1768 This variable contains the name of the dynamic loading file that
1769 will be used with the package.
1771 doublesize (doublesize.U):
1772 This variable contains the value of the DOUBLESIZE symbol, which
1773 indicates to the C program how many bytes there are in a double.
1775 drand01 (randfunc.U):
1776 Indicates the macro to be used to generate normalized
1777 random numbers. Uses randfunc, often divided by
1778 (double) (((unsigned long) 1 << randbits)) in order to
1779 normalize the result.
1780 In C programs, the macro 'Drand01' is mapped to drand01.
1782 dynamic_ext (Extensions.U):
1783 This variable holds a list of XS extension files we want to
1784 link dynamically into the package. It is used by Makefile.
1786 eagain (nblock_io.U):
1787 This variable bears the symbolic errno code set by read() when no
1788 data is present on the file and non-blocking I/O was enabled (otherwise,
1789 read() blocks naturally).
1792 This variable conditionally defines EBCDIC if this
1793 system uses EBCDIC encoding. Among other things, this
1794 means that the character ranges are not contiguous.
1798 This variable is used internally by Configure to determine the
1799 full pathname (if any) of the echo program. After Configure runs,
1800 the value is reset to a plain "echo" and is not useful.
1803 This variable is used internally by Configure to determine the
1804 full pathname (if any) of the egrep program. After Configure runs,
1805 the value is reset to a plain "egrep" and is not useful.
1808 This variable is defined but not used by Configure.
1809 The value is a plain '' and is not useful.
1812 When running under Eunice this variable contains a command which will
1813 convert a shell script to the proper form of text file for it to be
1814 executable by the shell. On other systems it is a no-op.
1817 This is an old synonym for _exe.
1820 This variable is used internally by Configure to determine the
1821 full pathname (if any) of the expr program. After Configure runs,
1822 the value is reset to a plain "expr" and is not useful.
1824 extensions (Extensions.U):
1825 This variable holds a list of all extension files (both XS and
1826 non-xs linked into the package. It is propagated to Config.pm
1827 and is typically used to test whether a particular extesion
1830 fflushall (fflushall.U):
1831 This symbol, if defined, tells that to flush
1832 all pending stdio output one must loop through all
1833 the stdio file handles stored in an array and fflush them.
1834 Note that if fflushNULL is defined, fflushall will not
1835 even be probed for and will be left undefined.
1837 fflushNULL (fflushall.U):
1838 This symbol, if defined, tells that fflush(NULL) does flush
1839 all pending stdio output.
1842 This variable is defined but not used by Configure.
1843 The value is a plain '' and is not useful.
1845 firstmakefile (Unix.U):
1846 This variable defines the first file searched by make. On unix,
1847 it is makefile (then Makefile). On case-insensitive systems,
1848 it might be something else. This is only used to deal with
1849 convoluted make depend tricks.
1852 This variable is defined but not used by Configure.
1853 The value is a plain '' and is not useful.
1855 fpossize (fpossize.U):
1856 This variable contains the size of a fpostype in bytes.
1858 fpostype (fpostype.U):
1859 This variable defines Fpos_t to be something like fpos_t, long,
1860 uint, or whatever type is used to declare file positions in libc.
1862 freetype (mallocsrc.U):
1863 This variable contains the return type of free(). It is usually
1864 void, but occasionally int.
1867 This variable contains the full pathname to 'ar', whether or
1868 not the user has specified 'portability'. This is only used
1872 This variable contains the full pathname to 'csh', whether or
1873 not the user has specified 'portability'. This is only used
1874 in the compiled C program, and we assume that all systems which
1875 can share this executable will have the same full pathname to
1878 full_sed (Loc_sed.U):
1879 This variable contains the full pathname to 'sed', whether or
1880 not the user has specified 'portability'. This is only used
1881 in the compiled C program, and we assume that all systems which
1882 can share this executable will have the same full pathname to
1885 gccosandvers (gccvers.U):
1886 If GNU cc (gcc) is used, this variable the operating system and
1887 version used to compile the gcc. It is set to '' if not gcc,
1888 or if nothing useful can be parsed as the os version.
1890 gccversion (gccvers.U):
1891 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1892 indicate whether the compiler is version 1 or 2. This is used in
1893 setting some of the default cflags. It is set to '' if not gcc.
1896 This variable contains the format string used for printing a Gid_t.
1898 gidsign (gidsign.U):
1899 This variable contains the signedness of a gidtype.
1900 1 for unsigned, -1 for signed.
1902 gidsize (gidsize.U):
1903 This variable contains the size of a gidtype in bytes.
1905 gidtype (gidtype.U):
1906 This variable defines Gid_t to be something like gid_t, int,
1907 ushort, or whatever type is used to declare the return type
1908 of getgid(). Typically, it is the type of group ids in the kernel.
1911 This variable holds the general path (space-separated) used to
1912 find libraries. It may contain directories that do not exist on
1913 this platform, libpth is the cleaned-up version.
1916 This variable is used internally by Configure to determine the
1917 full pathname (if any) of the grep program. After Configure runs,
1918 the value is reset to a plain "grep" and is not useful.
1921 This variable contains a command that produces the text of the
1922 /etc/group file. This is normally "cat /etc/group", but can be
1923 "ypcat group" when NIS is used.
1924 On some systems, such as os390, there may be no equivalent
1925 command, in which case this variable is unset.
1927 groupstype (groupstype.U):
1928 This variable defines Groups_t to be something like gid_t, int,
1929 ushort, or whatever type is used for the second argument to
1930 getgroups() and setgroups(). Usually, this is the same as
1931 gidtype (gid_t), but sometimes it isn't.
1934 This variable is used internally by Configure to determine the
1935 full pathname (if any) of the gzip program. After Configure runs,
1936 the value is reset to a plain "gzip" and is not useful.
1938 h_fcntl (h_fcntl.U):
1939 This is variable gets set in various places to tell i_fcntl that
1940 <fcntl.h> should be included.
1942 h_sysfile (h_sysfile.U):
1943 This is variable gets set in various places to tell i_sys_file that
1944 <sys/file.h> should be included.
1947 Gives the type of hints used for previous answers. May be one of
1948 "default", "recommended" or "previous".
1951 This variable contains a command that produces the text of the
1952 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1953 "ypcat hosts" when NIS is used.
1954 On some systems, such as os390, there may be no equivalent
1955 command, in which case this variable is unset.
1958 This variable is the size of an I16 in bytes.
1961 This variable contains the C type used for Perl's I16.
1964 This variable is the size of an I32 in bytes.
1967 This variable contains the C type used for Perl's I32.
1970 This variable is the size of an I64 in bytes.
1973 This variable contains the C type used for Perl's I64.
1976 This variable is the size of an I8 in bytes.
1979 This variable contains the C type used for Perl's I8.
1981 i_arpainet (i_arpainet.U):
1982 This variable conditionally defines the I_ARPA_INET symbol,
1983 and indicates whether a C program should include <arpa/inet.h>.
1985 i_bsdioctl (i_sysioctl.U):
1986 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1987 indicates to the C program that <sys/bsdioctl.h> exists and should
1991 This variable conditionally defines the I_DB symbol, and indicates
1992 whether a C program may include Berkeley's DB include file <db.h>.
1995 This variable conditionally defines the I_DBM symbol, which
1996 indicates to the C program that <dbm.h> exists and should
1999 i_dirent (i_dirent.U):
2000 This variable conditionally defines I_DIRENT, which indicates
2001 to the C program that it should include <dirent.h>.
2004 This variable conditionally defines the I_DLD symbol, which
2005 indicates to the C program that <dld.h> (GNU dynamic loading)
2006 exists and should be included.
2008 i_dlfcn (i_dlfcn.U):
2009 This variable conditionally defines the I_DLFCN symbol, which
2010 indicates to the C program that <dlfcn.h> exists and should
2013 i_fcntl (i_fcntl.U):
2014 This variable controls the value of I_FCNTL (which tells
2015 the C program to include <fcntl.h>).
2017 i_float (i_float.U):
2018 This variable conditionally defines the I_FLOAT symbol, and indicates
2019 whether a C program may include <float.h> to get symbols like DBL_MAX
2020 or DBL_MIN, i.e. machine dependent floating point values.
2023 This variable conditionally defines the I_GDBM symbol, which
2024 indicates to the C program that <gdbm.h> exists and should
2028 This variable conditionally defines the I_GRP symbol, and indicates
2029 whether a C program should include <grp.h>.
2031 i_iconv (i_iconv.U):
2032 This variable conditionally defines the I_ICONV symbol, and indicates
2033 whether a C program should include <iconv.h>.
2035 i_ieeefp (i_ieeefp.U):
2036 This variable conditionally defines the I_IEEEFP symbol, and indicates
2037 whether a C program should include <ieeefp.h>.
2039 i_inttypes (i_inttypes.U):
2040 This variable conditionally defines the I_INTTYPES symbol,
2041 and indicates whether a C program should include <inttypes.h>.
2043 i_libutil (i_libutil.U):
2044 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2045 whether a C program should include <libutil.h>.
2047 i_limits (i_limits.U):
2048 This variable conditionally defines the I_LIMITS symbol, and indicates
2049 whether a C program may include <limits.h> to get symbols like WORD_BIT
2052 i_locale (i_locale.U):
2053 This variable conditionally defines the I_LOCALE symbol,
2054 and indicates whether a C program should include <locale.h>.
2056 i_machcthr (i_machcthr.U):
2057 This variable conditionally defines the I_MACH_CTHREADS symbol,
2058 and indicates whether a C program should include <mach/cthreads.h>.
2060 i_malloc (i_malloc.U):
2061 This variable conditionally defines the I_MALLOC symbol, and indicates
2062 whether a C program should include <malloc.h>.
2065 This variable conditionally defines the I_MATH symbol, and indicates
2066 whether a C program may include <math.h>.
2068 i_memory (i_memory.U):
2069 This variable conditionally defines the I_MEMORY symbol, and indicates
2070 whether a C program should include <memory.h>.
2072 i_mntent (i_mntent.U):
2073 This variable conditionally defines the I_MNTENT symbol, and indicates
2074 whether a C program should include <mntent.h>.
2077 This variable conditionally defines the I_NDBM symbol, which
2078 indicates to the C program that <ndbm.h> exists and should
2081 i_netdb (i_netdb.U):
2082 This variable conditionally defines the I_NETDB symbol, and indicates
2083 whether a C program should include <netdb.h>.
2085 i_neterrno (i_neterrno.U):
2086 This variable conditionally defines the I_NET_ERRNO symbol, which
2087 indicates to the C program that <net/errno.h> exists and should
2090 i_netinettcp (i_netinettcp.U):
2091 This variable conditionally defines the I_NETINET_TCP symbol,
2092 and indicates whether a C program should include <netinet/tcp.h>.
2095 This variable conditionally defines I_NETINET_IN, which indicates
2096 to the C program that it should include <netinet/in.h>. Otherwise,
2097 you may try <sys/in.h>.
2100 This variable conditionally defines the I_POLL symbol, and indicates
2101 whether a C program should include <poll.h>.
2104 This variable conditionally defines the I_PROT symbol, and indicates
2105 whether a C program should include <prot.h>.
2107 i_pthread (i_pthread.U):
2108 This variable conditionally defines the I_PTHREAD symbol,
2109 and indicates whether a C program should include <pthread.h>.
2112 This variable conditionally defines I_PWD, which indicates
2113 to the C program that it should include <pwd.h>.
2115 i_rpcsvcdbm (i_dbm.U):
2116 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2117 indicates to the C program that <rpcsvc/dbm.h> exists and should
2118 be included. Some System V systems might need this instead of <dbm.h>.
2121 This variable conditionally defines the I_SFIO symbol,
2122 and indicates whether a C program should include <sfio.h>.
2124 i_sgtty (i_termio.U):
2125 This variable conditionally defines the I_SGTTY symbol, which
2126 indicates to the C program that it should include <sgtty.h> rather
2129 i_shadow (i_shadow.U):
2130 This variable conditionally defines the I_SHADOW symbol, and indicates
2131 whether a C program should include <shadow.h>.
2133 i_socks (i_socks.U):
2134 This variable conditionally defines the I_SOCKS symbol, and indicates
2135 whether a C program should include <socks.h>.
2137 i_stdarg (i_varhdr.U):
2138 This variable conditionally defines the I_STDARG symbol, which
2139 indicates to the C program that <stdarg.h> exists and should
2142 i_stddef (i_stddef.U):
2143 This variable conditionally defines the I_STDDEF symbol, which
2144 indicates to the C program that <stddef.h> exists and should
2147 i_stdlib (i_stdlib.U):
2148 This variable conditionally defines the I_STDLIB symbol, which
2149 indicates to the C program that <stdlib.h> exists and should
2152 i_string (i_string.U):
2153 This variable conditionally defines the I_STRING symbol, which
2154 indicates that <string.h> should be included rather than <strings.h>.
2156 i_sunmath (i_sunmath.U):
2157 This variable conditionally defines the I_SUNMATH symbol, and indicates
2158 whether a C program should include <sunmath.h>.
2160 i_sysaccess (i_sysaccess.U):
2161 This variable conditionally defines the I_SYS_ACCESS symbol,
2162 and indicates whether a C program should include <sys/access.h>.
2164 i_sysdir (i_sysdir.U):
2165 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2166 whether a C program should include <sys/dir.h>.
2168 i_sysfile (i_sysfile.U):
2169 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2170 whether a C program should include <sys/file.h> to get R_OK and friends.
2172 i_sysfilio (i_sysioctl.U):
2173 This variable conditionally defines the I_SYS_FILIO symbol, which
2174 indicates to the C program that <sys/filio.h> exists and should
2175 be included in preference to <sys/ioctl.h>.
2178 This variable conditionally defines I_SYS_IN, which indicates
2179 to the C program that it should include <sys/in.h> instead of
2182 i_sysioctl (i_sysioctl.U):
2183 This variable conditionally defines the I_SYS_IOCTL symbol, which
2184 indicates to the C program that <sys/ioctl.h> exists and should
2187 i_syslog (i_syslog.U):
2188 This variable conditionally defines the I_SYSLOG symbol,
2189 and indicates whether a C program should include <syslog.h>.
2191 i_sysmman (i_sysmman.U):
2192 This variable conditionally defines the I_SYS_MMAN symbol, and
2193 indicates whether a C program should include <sys/mman.h>.
2195 i_sysmode (i_sysmode.U):
2196 This variable conditionally defines the I_SYSMODE symbol,
2197 and indicates whether a C program should include <sys/mode.h>.
2199 i_sysmount (i_sysmount.U):
2200 This variable conditionally defines the I_SYSMOUNT symbol,
2201 and indicates whether a C program should include <sys/mount.h>.
2203 i_sysndir (i_sysndir.U):
2204 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2205 whether a C program should include <sys/ndir.h>.
2207 i_sysparam (i_sysparam.U):
2208 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2209 whether a C program should include <sys/param.h>.
2211 i_sysresrc (i_sysresrc.U):
2212 This variable conditionally defines the I_SYS_RESOURCE symbol,
2213 and indicates whether a C program should include <sys/resource.h>.
2215 i_syssecrt (i_syssecrt.U):
2216 This variable conditionally defines the I_SYS_SECURITY symbol,
2217 and indicates whether a C program should include <sys/security.h>.
2219 i_sysselct (i_sysselct.U):
2220 This variable conditionally defines I_SYS_SELECT, which indicates
2221 to the C program that it should include <sys/select.h> in order to
2222 get the definition of struct timeval.
2224 i_syssockio (i_sysioctl.U):
2225 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2226 C program that socket ioctl codes may be found in <sys/sockio.h>
2227 instead of <sys/ioctl.h>.
2229 i_sysstat (i_sysstat.U):
2230 This variable conditionally defines the I_SYS_STAT symbol,
2231 and indicates whether a C program should include <sys/stat.h>.
2233 i_sysstatfs (i_sysstatfs.U):
2234 This variable conditionally defines the I_SYSSTATFS symbol,
2235 and indicates whether a C program should include <sys/statfs.h>.
2237 i_sysstatvfs (i_sysstatvfs.U):
2238 This variable conditionally defines the I_SYSSTATVFS symbol,
2239 and indicates whether a C program should include <sys/statvfs.h>.
2241 i_systime (i_time.U):
2242 This variable conditionally defines I_SYS_TIME, which indicates
2243 to the C program that it should include <sys/time.h>.
2245 i_systimek (i_time.U):
2246 This variable conditionally defines I_SYS_TIME_KERNEL, which
2247 indicates to the C program that it should include <sys/time.h>
2248 with KERNEL defined.
2250 i_systimes (i_systimes.U):
2251 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2252 whether a C program should include <sys/times.h>.
2254 i_systypes (i_systypes.U):
2255 This variable conditionally defines the I_SYS_TYPES symbol,
2256 and indicates whether a C program should include <sys/types.h>.
2258 i_sysuio (i_sysuio.U):
2259 This variable conditionally defines the I_SYSUIO symbol, and indicates
2260 whether a C program should include <sys/uio.h>.
2262 i_sysun (i_sysun.U):
2263 This variable conditionally defines I_SYS_UN, which indicates
2264 to the C program that it should include <sys/un.h> to get UNIX
2265 domain socket definitions.
2267 i_sysutsname (i_sysutsname.U):
2268 This variable conditionally defines the I_SYSUTSNAME symbol,
2269 and indicates whether a C program should include <sys/utsname.h>.
2271 i_sysvfs (i_sysvfs.U):
2272 This variable conditionally defines the I_SYSVFS symbol,
2273 and indicates whether a C program should include <sys/vfs.h>.
2275 i_syswait (i_syswait.U):
2276 This variable conditionally defines I_SYS_WAIT, which indicates
2277 to the C program that it should include <sys/wait.h>.
2279 i_termio (i_termio.U):
2280 This variable conditionally defines the I_TERMIO symbol, which
2281 indicates to the C program that it should include <termio.h> rather
2284 i_termios (i_termio.U):
2285 This variable conditionally defines the I_TERMIOS symbol, which
2286 indicates to the C program that the POSIX <termios.h> file is
2290 This variable conditionally defines I_TIME, which indicates
2291 to the C program that it should include <time.h>.
2293 i_unistd (i_unistd.U):
2294 This variable conditionally defines the I_UNISTD symbol, and indicates
2295 whether a C program should include <unistd.h>.
2297 i_ustat (i_ustat.U):
2298 This variable conditionally defines the I_USTAT symbol, and indicates
2299 whether a C program should include <ustat.h>.
2301 i_utime (i_utime.U):
2302 This variable conditionally defines the I_UTIME symbol, and indicates
2303 whether a C program should include <utime.h>.
2305 i_values (i_values.U):
2306 This variable conditionally defines the I_VALUES symbol, and indicates
2307 whether a C program may include <values.h> to get symbols like MAXLONG
2310 i_varargs (i_varhdr.U):
2311 This variable conditionally defines I_VARARGS, which indicates
2312 to the C program that it should include <varargs.h>.
2314 i_varhdr (i_varhdr.U):
2315 Contains the name of the header to be included to get va_dcl definition.
2316 Typically one of varargs.h or stdarg.h.
2318 i_vfork (i_vfork.U):
2319 This variable conditionally defines the I_VFORK symbol, and indicates
2320 whether a C program should include vfork.h.
2322 ignore_versioned_solibs (libs.U):
2323 This variable should be non-empty if non-versioned shared
2324 libraries (libfoo.so.x.y) are to be ignored (because they
2325 cannot be linked against).
2327 inc_version_list (inc_version_list.U):
2328 This variable specifies the list of subdirectories in over
2329 which perl.c:incpush() and lib/lib.pm will automatically
2330 search when adding directories to @INC. The elements in
2331 the list are separated by spaces. This is only useful
2332 if you have a perl library directory tree structured like the
2333 default one. See INSTALL for how this works. The versioned
2334 site_perl directory was introduced in 5.005, so that is the
2335 lowest possible value.
2337 inc_version_list_init (inc_version_list.U):
2338 This variable holds the same list as inc_version_list, but
2339 each item is enclosed in double quotes and separated by commas,
2340 suitable for use in the PERL_INC_VERSION_LIST initialization.
2343 This variable must preceed the normal include path to get hte
2344 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2345 Value can be "" or "/bsd43" on mips.
2348 This variable is defined but not used by Configure.
2349 The value is a plain '' and is not useful.
2351 installarchlib (archlib.U):
2352 This variable is really the same as archlibexp but may differ on
2353 those systems using AFS. For extra portability, only this variable
2354 should be used in makefiles.
2357 This variable is the same as binexp unless AFS is running in which case
2358 the user is explicitely prompted for it. This variable should always
2359 be used in your makefiles for maximum portability.
2361 installman1dir (man1dir.U):
2362 This variable is really the same as man1direxp, unless you are using
2363 AFS in which case it points to the read/write location whereas
2364 man1direxp only points to the read-only access location. For extra
2365 portability, you should only use this variable within your makefiles.
2367 installman3dir (man3dir.U):
2368 This variable is really the same as man3direxp, unless you are using
2369 AFS in which case it points to the read/write location whereas
2370 man3direxp only points to the read-only access location. For extra
2371 portability, you should only use this variable within your makefiles.
2373 installprefix (installprefix.U):
2374 This variable holds the name of the directory below which
2375 "make install" will install the package. For most users, this
2376 is the same as prefix. However, it is useful for
2377 installing the software into a different (usually temporary)
2378 location after which it can be bundled up and moved somehow
2379 to the final location specified by prefix.
2381 installprefixexp (installprefix.U):
2382 This variable holds the full absolute path of installprefix
2383 with all ~-expansion done.
2385 installprivlib (privlib.U):
2386 This variable is really the same as privlibexp but may differ on
2387 those systems using AFS. For extra portability, only this variable
2388 should be used in makefiles.
2390 installscript (scriptdir.U):
2391 This variable is usually the same as scriptdirexp, unless you are on
2392 a system running AFS, in which case they may differ slightly. You
2393 should always use this variable within your makefiles for portability.
2395 installsitearch (sitearch.U):
2396 This variable is really the same as sitearchexp but may differ on
2397 those systems using AFS. For extra portability, only this variable
2398 should be used in makefiles.
2400 installsitebin (sitebin.U):
2401 This variable is usually the same as sitebinexp, unless you are on
2402 a system running AFS, in which case they may differ slightly. You
2403 should always use this variable within your makefiles for portability.
2405 installsitelib (sitelib.U):
2406 This variable is really the same as sitelibexp but may differ on
2407 those systems using AFS. For extra portability, only this variable
2408 should be used in makefiles.
2410 installstyle (installstyle.U):
2411 This variable describes the "style" of the perl installation.
2412 This is intended to be useful for tools that need to
2413 manipulate entire perl distributions. Perl itself doesn't use
2414 this to find its libraries -- the library directories are
2415 stored directly in Config.pm. Currently, there are only two
2416 styles: "lib" and "lib/perl5". The default library locations
2417 (e.g. privlib, sitelib) are either $prefix/lib or
2418 $prefix/lib/perl5. The former is useful if $prefix is a
2419 directory dedicated to perl (e.g. /opt/perl), while the latter
2420 is useful if $prefix is shared by many packages, e.g. if
2422 This may later be extended to include other information, so
2423 be careful with pattern-matching on the results.
2424 For compatibility with perl5.005 and earlier, the default
2425 setting is based on whether or not $prefix contains the string
2428 installusrbinperl (instubperl.U):
2429 This variable tells whether Perl should be installed also as
2430 /usr/bin/perl in addition to
2433 installvendorarch (vendorarch.U):
2434 This variable is really the same as vendorarchexp but may differ on
2435 those systems using AFS. For extra portability, only this variable
2436 should be used in makefiles.
2438 installvendorbin (vendorbin.U):
2439 This variable is really the same as vendorbinexp but may differ on
2440 those systems using AFS. For extra portability, only this variable
2441 should be used in makefiles.
2443 installvendorlib (vendorlib.U):
2444 This variable is really the same as vendorlibexp but may differ on
2445 those systems using AFS. For extra portability, only this variable
2446 should be used in makefiles.
2448 intsize (intsize.U):
2449 This variable contains the value of the INTSIZE symbol, which
2450 indicates to the C program how many bytes there are in an int.
2452 issymlink (issymlink.U):
2453 This variable holds the test command to test for a symbolic link
2454 (if they are supported). Typical values include 'test -h' and
2457 ivdformat (perlxvf.U):
2458 This variable contains the format string used for printing
2459 a Perl IV as a signed decimal integer.
2462 This variable is the size of an IV in bytes.
2465 This variable contains the C type used for Perl's IV.
2467 known_extensions (Extensions.U):
2468 This variable holds a list of all XS extensions included in
2472 This variable is defined but not used by Configure.
2473 The value is a plain '' and is not useful.
2476 This variable indicates the program to be used to link
2477 libraries for dynamic loading. On some systems, it is 'ld'.
2478 On ELF systems, it should be $cc. Mostly, we'll try to respect
2479 the hint file setting.
2481 lddlflags (dlsrc.U):
2482 This variable contains any special flags that might need to be
2483 passed to $ld to create a shared library suitable for dynamic
2484 loading. It is up to the makefile to use it. For hpux, it
2485 should be '-b'. For sunos 4.1, it is empty.
2487 ldflags (ccflags.U):
2488 This variable contains any additional C loader flags desired by
2489 the user. It is up to the Makefile to use this.
2491 ldflags_uselargefiles (uselfs.U):
2492 This variable contains the loader flags needed by large file builds
2493 and added to ldflags by hints files.
2495 ldlibpthname (libperl.U):
2496 This variable holds the name of the shared library
2497 search path, often LD_LIBRARY_PATH. To get an empty
2498 string, the hints file must set this to 'none'.
2501 This variable is used internally by Configure to determine the
2502 full pathname (if any) of the less program. After Configure runs,
2503 the value is reset to a plain "less" and is not useful.
2506 This is an old synonym for _a.
2509 This variable contains the location of the C library.
2511 libperl (libperl.U):
2512 The perl executable is obtained by linking perlmain.c with
2513 libperl, any static extensions (usually just DynaLoader),
2514 and any other libraries needed on this system. libperl
2515 is usually libperl.a, but can also be libperl.so.xxx if
2516 the user wishes to build a perl executable with a shared
2520 This variable holds the general path (space-separated) used to find
2521 libraries. It is intended to be used by other units.
2524 This variable holds the additional libraries we want to use.
2525 It is up to the Makefile to deal with it.
2528 This variable holds the directory names aka dirnames of the libraries
2529 we found and accepted, duplicates are removed.
2532 This variable holds the filenames aka basenames of the libraries
2533 we found and accepted.
2536 This variable holds the full pathnames of the libraries
2537 we found and accepted.
2540 This variable holds the directory names probed for libraries.
2542 libswanted (Myinit.U):
2543 This variable holds a list of all the libraries we want to
2544 search. The order is chosen to pick up the c library
2545 ahead of ucb or bsd libraries for SVR4.
2547 libswanted_uselargefiles (uselfs.U):
2548 This variable contains the libraries needed by large file builds
2549 and added to ldflags by hints files. It is a space separated list
2550 of the library names without the "lib" prefix or any suffix, just
2554 This variable is defined but not used by Configure.
2555 The value is a plain '' and is not useful.
2558 This variable is defined but not used by Configure.
2559 The value is a plain '' and is not useful.
2561 lkflags (ccflags.U):
2562 This variable contains any additional C partial linker flags desired by
2563 the user. It is up to the Makefile to use this.
2566 This variable is used internally by Configure to determine the
2567 full pathname (if any) of the ln program. After Configure runs,
2568 the value is reset to a plain "ln" and is not useful.
2571 This variable holds the name of the command to make
2572 symbolic links (if they are supported). It can be used
2573 in the Makefile. It is either 'ln -s' or 'ln'
2575 locincpth (ccflags.U):
2576 This variable contains a list of additional directories to be
2577 searched by the compiler. The appropriate '-I' directives will
2578 be added to ccflags. This is intended to simplify setting
2579 local directories from the Configure command line.
2580 It's not much, but it parallels the loclibpth stuff in libpth.U.
2582 loclibpth (libpth.U):
2583 This variable holds the paths (space-separated) used to find local
2584 libraries. It is prepended to libpth, and is intended to be easily
2585 set from the command line.
2587 longdblsize (d_longdbl.U):
2588 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2589 indicates to the C program how many bytes there are in a long double,
2590 if this system supports long doubles.
2592 longlongsize (d_longlong.U):
2593 This variable contains the value of the LONGLONGSIZE symbol, which
2594 indicates to the C program how many bytes there are in a long long,
2595 if this system supports long long.
2597 longsize (intsize.U):
2598 This variable contains the value of the LONGSIZE symbol, which
2599 indicates to the C program how many bytes there are in a long.
2602 This variable is defined but not used by Configure.
2603 The value is a plain '' and is not useful.
2606 This variable is defined but not used by Configure.
2607 The value is a plain '' and is not useful.
2610 This variable is used internally by Configure to determine the
2611 full pathname (if any) of the ls program. After Configure runs,
2612 the value is reset to a plain "ls" and is not useful.
2614 lseeksize (lseektype.U):
2615 This variable defines lseektype to be something like off_t, long,
2616 or whatever type is used to declare lseek offset's type in the
2617 kernel (which also appears to be lseek's return type).
2619 lseektype (lseektype.U):
2620 This variable defines lseektype to be something like off_t, long,
2621 or whatever type is used to declare lseek offset's type in the
2622 kernel (which also appears to be lseek's return type).
2625 This variable is defined but not used by Configure.
2626 The value is a plain '' and is not useful.
2629 This variable is defined but not used by Configure.
2630 The value is a plain '' and is not useful.
2633 This variable is used internally by Configure to determine the
2634 full pathname (if any) of the make program. After Configure runs,
2635 the value is reset to a plain "make" and is not useful.
2637 make_set_make (make.U):
2638 Some versions of 'make' set the variable MAKE. Others do not.
2639 This variable contains the string to be included in Makefile.SH
2640 so that MAKE is set if needed, and not if not needed.
2641 Possible values are:
2642 make_set_make='#' # If your make program handles this for you,
2643 make_set_make="MAKE=$make" # if it doesn't.
2644 I used a comment character so that we can distinguish a
2645 'set' value (from a previous config.sh or Configure '-D' option)
2646 from an uncomputed value.
2648 mallocobj (mallocsrc.U):
2649 This variable contains the name of the malloc.o that this package
2650 generates, if that malloc.o is preferred over the system malloc.
2651 Otherwise the value is null. This variable is intended for generating
2652 Makefiles. See mallocsrc.
2654 mallocsrc (mallocsrc.U):
2655 This variable contains the name of the malloc.c that comes with
2656 the package, if that malloc.c is preferred over the system malloc.
2657 Otherwise the value is null. This variable is intended for generating
2660 malloctype (mallocsrc.U):
2661 This variable contains the kind of ptr returned by malloc and realloc.
2663 man1dir (man1dir.U):
2664 This variable contains the name of the directory in which manual
2665 source pages are to be put. It is the responsibility of the
2666 Makefile.SH to get the value of this into the proper command.
2667 You must be prepared to do the ~name expansion yourself.
2669 man1direxp (man1dir.U):
2670 This variable is the same as the man1dir variable, but is filename
2671 expanded at configuration time, for convenient use in makefiles.
2673 man1ext (man1dir.U):
2674 This variable contains the extension that the manual page should
2675 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2678 man3dir (man3dir.U):
2679 This variable contains the name of the directory in which manual
2680 source pages are to be put. It is the responsibility of the
2681 Makefile.SH to get the value of this into the proper command.
2682 You must be prepared to do the ~name expansion yourself.
2684 man3direxp (man3dir.U):
2685 This variable is the same as the man3dir variable, but is filename
2686 expanded at configuration time, for convenient use in makefiles.
2688 man3ext (man3dir.U):
2689 This variable contains the extension that the manual page should
2690 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2694 This variable is used internally by Configure to determine the
2695 full pathname (if any) of the Mcc program. After Configure runs,
2696 the value is reset to a plain "Mcc" and is not useful.
2698 mips_type (usrinc.U):
2699 This variable holds the environment type for the mips system.
2700 Possible values are "BSD 4.3" and "System V".
2703 This variable is used internally by Configure to determine the
2704 full pathname (if any) of the mkdir program. After Configure runs,
2705 the value is reset to a plain "mkdir" and is not useful.
2707 mmaptype (d_mmap.U):
2708 This symbol contains the type of pointer returned by mmap()
2709 (and simultaneously the type of the first argument).
2710 It can be 'void *' or 'caddr_t'.
2712 modetype (modetype.U):
2713 This variable defines modetype to be something like mode_t,
2714 int, unsigned short, or whatever type is used to declare file
2715 modes for system calls.
2718 This variable is used internally by Configure to determine the
2719 full pathname (if any) of the more program. After Configure runs,
2720 the value is reset to a plain "more" and is not useful.
2722 multiarch (multiarch.U):
2723 This variable conditionally defines the MULTIARCH symbol
2724 which signifies the presence of multiplatform files.
2725 This is normally set by hints files.
2728 This variable is defined but not used by Configure.
2729 The value is a plain '' and is not useful.
2731 myarchname (archname.U):
2732 This variable holds the architecture name computed by Configure in
2733 a previous run. It is not intended to be perused by any user and
2734 should never be set in a hint file.
2736 mydomain (myhostname.U):
2737 This variable contains the eventual value of the MYDOMAIN symbol,
2738 which is the domain of the host the program is going to run on.
2739 The domain must be appended to myhostname to form a complete host name.
2740 The dot comes with mydomain, and need not be supplied by the program.
2742 myhostname (myhostname.U):
2743 This variable contains the eventual value of the MYHOSTNAME symbol,
2744 which is the name of the host the program is going to run on.
2745 The domain is not kept with hostname, but must be gotten from mydomain.
2746 The dot comes with mydomain, and need not be supplied by the program.
2748 myuname (Oldconfig.U):
2749 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2750 pseudo variables assignments in the output are stripped, thank you. The
2751 whole thing is then lower-cased.
2754 This variable contains the '-n' flag if that is what causes the echo
2755 command to suppress newline. Otherwise it is null. Correct usage is
2756 $echo $n "prompt for a question: $c".
2758 need_va_copy (need_va_copy.U):
2759 This symbol, if defined, indicates that the system stores
2760 the variable argument list datatype, va_list, in a format
2761 that cannot be copied by simple assignment, so that some
2762 other means must be used when copying is required.
2763 As such systems vary in their provision (or non-provision)
2764 of copying mechanisms, handy.h defines a platform-
2765 independent macro, Perl_va_copy(src, dst), to do the job.
2767 netdb_hlen_type (netdbtype.U):
2768 This variable holds the type used for the 2nd argument to
2769 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2770 This is only useful if you have gethostbyaddr(), naturally.
2772 netdb_host_type (netdbtype.U):
2773 This variable holds the type used for the 1st argument to
2774 gethostbyaddr(). Usually, this is char * or void *, possibly
2775 with or without a const prefix.
2776 This is only useful if you have gethostbyaddr(), naturally.
2778 netdb_name_type (netdbtype.U):
2779 This variable holds the type used for the argument to
2780 gethostbyname(). Usually, this is char * or const char *.
2781 This is only useful if you have gethostbyname(), naturally.
2783 netdb_net_type (netdbtype.U):
2784 This variable holds the type used for the 1st argument to
2785 getnetbyaddr(). Usually, this is int or long.
2786 This is only useful if you have getnetbyaddr(), naturally.
2789 This variable is used internally by Configure to determine the
2790 full pathname (if any) of the nm program. After Configure runs,
2791 the value is reset to a plain "nm" and is not useful.
2794 This variable holds the options that may be necessary for nm.
2796 nm_so_opt (usenm.U):
2797 This variable holds the options that may be necessary for nm
2798 to work on a shared library but that can not be used on an
2799 archive library. Currently, this is only used by Linux, where
2800 nm --dynamic is *required* to get symbols from an ELF library which
2801 has been stripped, but nm --dynamic is *fatal* on an archive library.
2802 Maybe Linux should just always set usenm=false.
2804 nonxs_ext (Extensions.U):
2805 This variable holds a list of all non-xs extensions included
2806 in the package. All of them will be built.
2809 This variable is used internally by Configure to determine the
2810 full pathname (if any) of the nroff program. After Configure runs,
2811 the value is reset to a plain "nroff" and is not useful.
2813 nveformat (perlxvf.U):
2814 This variable contains the format string used for printing
2815 a Perl NV using %e-ish floating point format.
2817 nvEUformat (perlxvf.U):
2818 This variable contains the format string used for printing
2819 a Perl NV using %E-ish floating point format.
2821 nvfformat (perlxvf.U):
2822 This variable confains the format string used for printing
2823 a Perl NV using %f-ish floating point format.
2825 nvFUformat (perlxvf.U):
2826 This variable confains the format string used for printing
2827 a Perl NV using %F-ish floating point format.
2829 nvgformat (perlxvf.U):
2830 This variable contains the format string used for printing
2831 a Perl NV using %g-ish floating point format.
2833 nvGUformat (perlxvf.U):
2834 This variable contains the format string used for printing
2835 a Perl NV using %G-ish floating point format.
2838 This variable is the size of an NV in bytes.
2841 This variable contains the C type used for Perl's NV.
2843 o_nonblock (nblock_io.U):
2844 This variable bears the symbol value to be used during open() or fcntl()
2845 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2846 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2847 but that is only supported by some devices.
2850 This is an old synonym for _o.
2852 old_pthread_create_joinable (d_pthrattrj.U):
2853 This variable defines the constant to use for creating joinable
2854 (aka undetached) pthreads. Unused if pthread.h defines
2855 PTHREAD_CREATE_JOINABLE. If used, possible values are
2856 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2858 optimize (ccflags.U):
2859 This variable contains any optimizer/debugger flag that should be used.
2860 It is up to the Makefile to use it.
2862 orderlib (orderlib.U):
2863 This variable is "true" if the components of libraries must be ordered
2864 (with `lorder $* | tsort`) before placing them in an archive. Set to
2865 "false" if ranlib or ar can generate random libraries.
2867 osname (Oldconfig.U):
2868 This variable contains the operating system name (e.g. sunos,
2869 solaris, hpux, etc.). It can be useful later on for setting
2870 defaults. Any spaces are replaced with underscores. It is set
2871 to a null string if we can't figure it out.
2873 osvers (Oldconfig.U):
2874 This variable contains the operating system version (e.g.
2875 4.1.3, 5.2, etc.). It is primarily used for helping select
2876 an appropriate hints file, but might be useful elsewhere for
2877 setting defaults. It is set to '' if we can't figure it out.
2878 We try to be flexible about how much of the version number
2879 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2880 same for this package, hints files might just be os_4.0 or
2881 os_4.1, etc., not keeping separate files for each little release.
2883 otherlibdirs (otherlibdirs.U):
2884 This variable contains a colon-separated set of paths for the perl
2885 binary to search for additional library files or modules.
2886 These directories will be tacked to the end of @INC.
2887 Perl will automatically search below each path for version-
2888 and architecture-specific directories. See inc_version_list
2890 A value of ' ' means 'none' and is used to preserve this value
2891 for the next run through Configure.
2893 package (package.U):
2894 This variable contains the name of the package being constructed.
2895 It is primarily intended for the use of later Configure units.
2898 This variable contains the name of the preferred pager on the system.
2899 Usual values are (the full pathnames of) more, less, pg, or cat.
2902 This variable contains a command that produces the text of the
2903 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2904 "ypcat passwd" when NIS is used.
2905 On some systems, such as os390, there may be no equivalent
2906 command, in which case this variable is unset.
2908 patchlevel (patchlevel.U):
2909 The patchlevel level of this package.
2910 The value of patchlevel comes from the patchlevel.h file.
2911 In a version number such as 5.6.1, this is the "6".
2912 In patchlevel.h, this is referred to as "PERL_VERSION".
2915 This is an old synonym for p_ in Head.U, the character
2916 used to separate elements in the command shell search PATH.
2919 This variable contains the full path (if any) to a previously
2920 installed perl5.005 or later suitable for running the script
2921 to determine inc_version_list.
2924 This variable is defined but not used by Configure.
2925 The value is a plain '' and is not useful.
2927 PERL_REVISION (Oldsyms.U):
2928 In a Perl version number such as 5.6.2, this is the 5.
2929 This value is manually set in patchlevel.h
2931 PERL_SUBVERSION (Oldsyms.U):
2932 In a Perl version number such as 5.6.2, this is the 2.
2933 Values greater than 50 represent potentially unstable
2934 development subversions.
2935 This value is manually set in patchlevel.h
2937 PERL_VERSION (Oldsyms.U):
2938 In a Perl version number such as 5.6.2, this is the 6.
2939 This value is manually set in patchlevel.h
2941 perladmin (perladmin.U):
2942 Electronic mail address of the perl5 administrator.
2945 The list of libraries needed by Perl only (any libraries needed
2946 by extensions only will by dropped, if using dynamic loading).
2948 perlpath (perlpath.U):
2949 This variable contains the eventual value of the PERLPATH symbol,
2950 which contains the name of the perl interpreter to be used in
2951 shell scripts and in the "eval 'exec'" idiom.
2954 This variable is used internally by Configure to determine the
2955 full pathname (if any) of the pg program. After Configure runs,
2956 the value is reset to a plain "pg" and is not useful.
2958 phostname (myhostname.U):
2959 This variable contains the eventual value of the PHOSTNAME symbol,
2960 which is a command that can be fed to popen() to get the host name.
2961 The program should probably not presume that the domain is or isn't
2964 pidtype (pidtype.U):
2965 This variable defines PIDTYPE to be something like pid_t, int,
2966 ushort, or whatever type is used to declare process ids in the kernel.
2969 Holds the private path used by Configure to find out the libraries.
2970 Its value is prepend to libpth. This variable takes care of special
2971 machines, like the mips. Usually, it should be empty.
2973 pm_apiversion (xs_apiversion.U):
2974 This variable contains the version of the oldest perl
2975 compatible with the present perl. (That is, pure perl modules
2976 written for $pm_apiversion will still work for the current
2977 version). perl.c:incpush() and lib/lib.pm will automatically
2978 search in $sitelib for older directories across major versions
2979 back to pm_apiversion. This is only useful if you have a perl
2980 library directory tree structured like the default one. The
2981 versioned site_perl library was introduced in 5.005, so that's
2982 the default setting for this variable. It's hard to imagine
2983 it changing before Perl6. It is included here for symmetry
2984 with xs_apiveprsion -- the searching algorithms will
2985 (presumably) be similar.
2986 See the INSTALL file for how this works.
2989 This variable is defined but not used by Configure.
2990 The value is a plain '' and is not useful.
2993 This variable is defined but not used by Configure.
2994 The value is a plain '' and is not useful.
2997 This variable holds the name of the directory below which the
2998 user will install the package. Usually, this is /usr/local, and
2999 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3000 man pages in /usr/local/man, etc. It is only used to set defaults
3001 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3003 prefixexp (prefix.U):
3004 This variable holds the full absolute path of the directory below
3005 which the user will install the package. Derived from prefix.
3007 privlib (privlib.U):
3008 This variable contains the eventual value of the PRIVLIB symbol,
3009 which is the name of the private library for this package. It may
3010 have a ~ on the front. It is up to the makefile to eventually create
3011 this directory while performing installation (with ~ substitution).
3013 privlibexp (privlib.U):
3014 This variable is the ~name expanded version of privlib, so that you
3015 may use it directly in Makefiles or shell scripts.
3017 prototype (prototype.U):
3018 This variable holds the eventual value of CAN_PROTOTYPE, which
3019 indicates the C compiler can handle funciton prototypes.
3021 ptrsize (ptrsize.U):
3022 This variable contains the value of the PTRSIZE symbol, which
3023 indicates to the C program how many bytes there are in a pointer.
3025 quadkind (quadtype.U):
3026 This variable, if defined, encodes the type of a quad:
3027 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3029 quadtype (quadtype.U):
3030 This variable defines Quad_t to be something like long, int,
3031 long long, int64_t, or whatever type is used for 64-bit integers.
3033 randbits (randfunc.U):
3034 Indicates how many bits are produced by the function used to
3035 generate normalized random numbers.
3037 randfunc (randfunc.U):
3038 Indicates the name of the random number function to use.
3039 Values include drand48, random, and rand. In C programs,
3040 the 'Drand01' macro is defined to generate uniformly distributed
3041 random numbers over the range [0., 1.[ (see drand01 and nrand).
3043 randseedtype (randfunc.U):
3044 Indicates the type of the argument of the seedfunc.
3046 ranlib (orderlib.U):
3047 This variable is set to the pathname of the ranlib program, if it is
3048 needed to generate random libraries. Set to ":" if ar can generate
3049 random libraries or if random libraries are not supported
3051 rd_nodata (nblock_io.U):
3052 This variable holds the return code from read() when no data is
3053 present. It should be -1, but some systems return 0 when O_NDELAY is
3054 used, which is a shame because you cannot make the difference between
3055 no data and an EOF.. Sigh!
3057 revision (patchlevel.U):
3058 The value of revision comes from the patchlevel.h file.
3059 In a version number such as 5.6.1, this is the "5".
3060 In patchlevel.h, this is referred to as "PERL_REVISION".
3063 This variable is used internally by Configure to determine the
3064 full pathname (if any) of the rm program. After Configure runs,
3065 the value is reset to a plain "rm" and is not useful.
3068 This variable is defined but not used by Configure.
3069 The value is a plain '' and is not useful.
3072 This variable contains 'true' or 'false' depending whether the
3073 nm extraction should be performed or not, according to the value
3074 of usenm and the flags on the Configure command line.
3076 sched_yield (d_pthread_y.U):
3077 This variable defines the way to yield the execution
3078 of the current thread.
3080 scriptdir (scriptdir.U):
3081 This variable holds the name of the directory in which the user wants
3082 to put publicly scripts for the package in question. It is either
3083 the same directory as for binaries, or a special one that can be
3084 mounted across different architectures, like /usr/share. Programs
3085 must be prepared to deal with ~name expansion.
3087 scriptdirexp (scriptdir.U):
3088 This variable is the same as scriptdir, but is filename expanded
3089 at configuration time, for programs not wanting to bother with it.
3092 This variable is used internally by Configure to determine the
3093 full pathname (if any) of the sed program. After Configure runs,
3094 the value is reset to a plain "sed" and is not useful.
3096 seedfunc (randfunc.U):
3097 Indicates the random number generating seed function.
3098 Values include srand48, srandom, and srand.
3100 selectminbits (selectminbits.U):
3101 This variable holds the minimum number of bits operated by select.
3102 That is, if you do select(n, ...), how many bits at least will be
3103 cleared in the masks if some activity is detected. Usually this
3104 is either n or 32*ceil(n/32), especially many little-endians do
3105 the latter. This is only useful if you have select(), naturally.
3107 selecttype (selecttype.U):
3108 This variable holds the type used for the 2nd, 3rd, and 4th
3109 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3110 is defined, and 'int *' otherwise. This is only useful if you
3111 have select(), naturally.
3114 This variable is defined but not used by Configure.
3115 The value is a plain '' and is not useful.
3118 This variable contains the full pathname of the shell used
3119 on this system to execute Bourne shell scripts. Usually, this will be
3120 /bin/sh, though it's possible that some systems will have /bin/ksh,
3121 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3123 This unit comes before Options.U, so you can't set sh with a '-D'
3124 option, though you can override this (and startsh)
3125 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3128 This variable is defined but not used by Configure.
3129 The value is a plain '' and is not useful.
3131 sharpbang (spitshell.U):
3132 This variable contains the string #! if this system supports that
3135 shmattype (d_shmat.U):
3136 This symbol contains the type of pointer returned by shmat().
3137 It can be 'void *' or 'char *'.
3139 shortsize (intsize.U):
3140 This variable contains the value of the SHORTSIZE symbol which
3141 indicates to the C program how many bytes there are in a short.
3143 shrpenv (libperl.U):
3144 If the user builds a shared libperl.so, then we need to tell the
3145 'perl' executable where it will be able to find the installed libperl.so.
3146 One way to do this on some systems is to set the environment variable
3147 LD_RUN_PATH to the directory that will be the final location of the
3148 shared libperl.so. The makefile can use this with something like
3149 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3151 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3154 See the main perl Makefile.SH for actual working usage.
3155 Alternatively, we might be able to use a command line option such
3156 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3157 $archlibexp/CORE (Linux).
3159 shsharp (spitshell.U):
3160 This variable tells further Configure units whether your sh can
3163 sig_count (sig_name.U):
3164 This variable holds a number larger than the largest valid
3165 signal number. This is usually the same as the NSIG macro.
3167 sig_name (sig_name.U):
3168 This variable holds the signal names, space separated. The leading
3169 SIG in signal name is removed. A ZERO is prepended to the
3170 list. This is currently not used.
3172 sig_name_init (sig_name.U):
3173 This variable holds the signal names, enclosed in double quotes and
3174 separated by commas, suitable for use in the SIG_NAME definition
3175 below. A "ZERO" is prepended to the list, and the list is
3176 terminated with a plain 0. The leading SIG in signal names
3177 is removed. See sig_num.
3179 sig_num (sig_name.U):
3180 This variable holds the signal numbers, space separated. A ZERO is
3181 prepended to the list (corresponding to the fake SIGZERO), and
3182 the list is terminated with a 0. Those numbers correspond to
3183 the value of the signal listed in the same place within the
3186 sig_num_init (sig_name.U):
3187 This variable holds the signal numbers, enclosed in double quotes and
3188 separated by commas, suitable for use in the SIG_NUM definition
3189 below. A "ZERO" is prepended to the list, and the list is
3190 terminated with a plain 0.
3192 sig_size (sig_name.U):
3193 This variable contains the number of elements of the sig_name
3194 and sig_num arrays, excluding the final NULL entry.
3196 signal_t (d_voidsig.U):
3197 This variable holds the type of the signal handler (void or int).
3199 sitearch (sitearch.U):
3200 This variable contains the eventual value of the SITEARCH symbol,
3201 which is the name of the private library for this package. It may
3202 have a ~ on the front. It is up to the makefile to eventually create
3203 this directory while performing installation (with ~ substitution).
3204 The standard distribution will put nothing in this directory.
3205 After perl has been installed, users may install their own local
3206 architecture-dependent modules in this directory with
3207 MakeMaker Makefile.PL
3208 or equivalent. See INSTALL for details.
3210 sitearchexp (sitearch.U):
3211 This variable is the ~name expanded version of sitearch, so that you
3212 may use it directly in Makefiles or shell scripts.
3214 sitebin (sitebin.U):
3215 This variable holds the name of the directory in which the user wants
3216 to put add-on publicly executable files for the package in question. It
3217 is most often a local directory such as /usr/local/bin. Programs using
3218 this variable must be prepared to deal with ~name substitution.
3219 The standard distribution will put nothing in this directory.
3220 After perl has been installed, users may install their own local
3221 executables in this directory with
3222 MakeMaker Makefile.PL
3223 or equivalent. See INSTALL for details.
3225 sitebinexp (sitebin.U):
3226 This is the same as the sitebin variable, but is filename expanded at
3227 configuration time, for use in your makefiles.
3229 sitelib (sitelib.U):
3230 This variable contains the eventual value of the SITELIB symbol,
3231 which is the name of the private library for this package. It may
3232 have a ~ on the front. It is up to the makefile to eventually create
3233 this directory while performing installation (with ~ substitution).
3234 The standard distribution will put nothing in this directory.
3235 After perl has been installed, users may install their own local
3236 architecture-independent modules in this directory with
3237 MakeMaker Makefile.PL
3238 or equivalent. See INSTALL for details.
3240 sitelib_stem (sitelib.U):
3241 This variable is $sitelibexp with any trailing version-specific component
3242 removed. The elements in inc_version_list (inc_version_list.U) can
3243 be tacked onto this variable to generate a list of directories to search.
3245 sitelibexp (sitelib.U):
3246 This variable is the ~name expanded version of sitelib, so that you
3247 may use it directly in Makefiles or shell scripts.
3249 siteprefix (siteprefix.U):
3250 This variable holds the full absolute path of the directory below
3251 which the user will install add-on packages.
3252 See INSTALL for usage and examples.
3254 siteprefixexp (siteprefix.U):
3255 This variable holds the full absolute path of the directory below
3256 which the user will install add-on packages. Derived from siteprefix.
3258 sizesize (sizesize.U):
3259 This variable contains the size of a sizetype in bytes.
3261 sizetype (sizetype.U):
3262 This variable defines sizetype to be something like size_t,
3263 unsigned long, or whatever type is used to declare length
3264 parameters for string functions.
3267 This variable is defined but not used by Configure.
3268 The value is a plain '' and is not useful.
3271 This variable is defined but not used by Configure.
3272 The value is a plain '' and is not useful.
3275 This variable holds the extension used to identify shared libraries
3276 (also known as shared objects) on the system. Usually set to 'so'.
3278 sockethdr (d_socket.U):
3279 This variable has any cpp '-I' flags needed for socket support.
3281 socketlib (d_socket.U):
3282 This variable has the names of any libraries needed for socket support.
3284 socksizetype (socksizetype.U):
3285 This variable holds the type used for the size argument
3286 for various socket calls like accept. Usual values include
3287 socklen_t, size_t, and int.
3290 This variable is used internally by Configure to determine the
3291 full pathname (if any) of the sort program. After Configure runs,
3292 the value is reset to a plain "sort" and is not useful.
3294 spackage (package.U):
3295 This variable contains the name of the package being constructed,
3296 with the first letter uppercased, i.e. suitable for starting
3299 spitshell (spitshell.U):
3300 This variable contains the command necessary to spit out a runnable
3301 shell on this system. It is either cat or a grep '-v' for # comments.
3303 sPRId64 (quadfio.U):
3304 This variable, if defined, contains the string used by stdio to
3305 format 64-bit decimal numbers (format 'd') for output.
3307 sPRIeldbl (longdblfio.U):
3308 This variable, if defined, contains the string used by stdio to
3309 format long doubles (format 'e') for output.
3311 sPRIEUldbl (longdblfio.U):
3312 This variable, if defined, contains the string used by stdio to
3313 format long doubles (format 'E') for output.
3314 The 'U' in the name is to separate this from sPRIeldbl so that even
3315 case-blind systems can see the difference.
3317 sPRIfldbl (longdblfio.U):
3318 This variable, if defined, contains the string used by stdio to
3319 format long doubles (format 'f') for output.
3321 sPRIFUldbl (longdblfio.U):
3322 This variable, if defined, contains the string used by stdio to
3323 format long doubles (format 'F') for output.
3324 The 'U' in the name is to separate this from sPRIfldbl so that even
3325 case-blind systems can see the difference.
3327 sPRIgldbl (longdblfio.U):
3328 This variable, if defined, contains the string used by stdio to
3329 format long doubles (format 'g') for output.
3331 sPRIGUldbl (longdblfio.U):
3332 This variable, if defined, contains the string used by stdio to
3333 format long doubles (format 'G') for output.
3334 The 'U' in the name is to separate this from sPRIgldbl so that even
3335 case-blind systems can see the difference.
3337 sPRIi64 (quadfio.U):
3338 This variable, if defined, contains the string used by stdio to
3339 format 64-bit decimal numbers (format 'i') for output.
3341 sPRIo64 (quadfio.U):
3342 This variable, if defined, contains the string used by stdio to
3343 format 64-bit octal numbers (format 'o') for output.
3345 sPRIu64 (quadfio.U):
3346 This variable, if defined, contains the string used by stdio to
3347 format 64-bit unsigned decimal numbers (format 'u') for output.
3349 sPRIx64 (quadfio.U):
3350 This variable, if defined, contains the string used by stdio to
3351 format 64-bit hexadecimal numbers (format 'x') for output.
3353 sPRIXU64 (quadfio.U):
3354 This variable, if defined, contains the string used by stdio to
3355 format 64-bit hExADECimAl numbers (format 'X') for output.
3356 The 'U' in the name is to separate this from sPRIx64 so that even
3357 case-blind systems can see the difference.
3360 This variable holds the path to the package source. It is up to
3361 the Makefile to use this variable and set VPATH accordingly to
3362 find the sources remotely.
3364 sSCNfldbl (longdblfio.U):
3365 This variable, if defined, contains the string used by stdio to
3366 format long doubles (format 'f') for input.
3368 ssizetype (ssizetype.U):
3369 This variable defines ssizetype to be something like ssize_t,
3370 long or int. It is used by functions that return a count
3371 of bytes or an error condition. It must be a signed type.
3372 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3374 startperl (startperl.U):
3375 This variable contains the string to put on the front of a perl
3376 script to make sure (hopefully) that it runs with perl and not some
3377 shell. Of course, that leading line must be followed by the classical
3379 eval 'exec perl -S $0 ${1+"$@"}'
3380 if $running_under_some_shell;
3381 to guarantee perl startup should the shell execute the script. Note
3382 that this magic incatation is not understood by csh.
3384 startsh (startsh.U):
3385 This variable contains the string to put on the front of a shell
3386 script to make sure (hopefully) that it runs with sh and not some
3389 static_ext (Extensions.U):
3390 This variable holds a list of XS extension files we want to
3391 link statically into the package. It is used by Makefile.
3393 stdchar (stdchar.U):
3394 This variable conditionally defines STDCHAR to be the type of char
3395 used in stdio.h. It has the values "unsigned char" or "char".
3397 stdio_base (d_stdstdio.U):
3398 This variable defines how, given a FILE pointer, fp, to access the
3399 _base field (or equivalent) of stdio.h's FILE structure. This will
3400 be used to define the macro FILE_base(fp).
3402 stdio_bufsiz (d_stdstdio.U):
3403 This variable defines how, given a FILE pointer, fp, to determine
3404 the number of bytes store in the I/O buffer pointer to by the
3405 _base field (or equivalent) of stdio.h's FILE structure. This will
3406 be used to define the macro FILE_bufsiz(fp).
3408 stdio_cnt (d_stdstdio.U):
3409 This variable defines how, given a FILE pointer, fp, to access the
3410 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3411 be used to define the macro FILE_cnt(fp).
3413 stdio_filbuf (d_stdstdio.U):
3414 This variable defines how, given a FILE pointer, fp, to tell
3415 stdio to refill it's internal buffers (?). This will
3416 be used to define the macro FILE_filbuf(fp).
3418 stdio_ptr (d_stdstdio.U):
3419 This variable defines how, given a FILE pointer, fp, to access the
3420 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3421 be used to define the macro FILE_ptr(fp).
3423 stdio_stream_array (stdio_streams.U):
3424 This variable tells the name of the array holding the stdio streams.
3425 Usual values include _iob, __iob, and __sF.
3427 strings (i_string.U):
3428 This variable holds the full path of the string header that will be
3429 used. Typically /usr/include/string.h or /usr/include/strings.h.
3432 This variable is defined but not used by Configure.
3433 The value is a plain '' and is not useful.
3435 subversion (patchlevel.U):
3436 The subversion level of this package.
3437 The value of subversion comes from the patchlevel.h file.
3438 In a version number such as 5.6.1, this is the "1".
3439 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3440 This is unique to perl.
3443 This variable holds the place where the manual is located on this
3444 system. It is not the place where the user wants to put his manual
3445 pages. Rather it is the place where Configure may look to find manual
3446 for unix commands (section 1 of the manual usually). See mansrc.
3449 This variable is defined but not used by Configure.
3450 The value is a plain '' and is not useful.
3453 This variable is defined but not used by Configure.
3454 The value is a plain '' and is not useful.
3457 This variable is defined but not used by Configure.
3458 The value is a plain '' and is not useful.
3461 This variable is defined but not used by Configure.
3462 The value is a plain '' and is not useful.
3465 This variable is used internally by Configure to determine the
3466 full pathname (if any) of the test program. After Configure runs,
3467 the value is reset to a plain "test" and is not useful.
3469 timeincl (i_time.U):
3470 This variable holds the full path of the included time header(s).
3472 timetype (d_time.U):
3473 This variable holds the type returned by time(). It can be long,
3474 or time_t on BSD sites (in which case <sys/types.h> should be
3475 included). Anyway, the type Time_t should be used.
3478 This variable is used internally by Configure to determine the
3479 full pathname (if any) of the touch program. After Configure runs,
3480 the value is reset to a plain "touch" and is not useful.
3483 This variable is used internally by Configure to determine the
3484 full pathname (if any) of the tr program. After Configure runs,
3485 the value is reset to a plain "tr" and is not useful.
3488 This variable contains the value to be passed to the tr(1)
3489 command to transliterate a newline. Typical values are
3490 '\012' and '\n'. This is needed for EBCDIC systems where
3491 newline is not necessarily '\012'.
3494 This variable is defined but not used by Configure.
3495 The value is a plain '' and is not useful.
3498 This variable is the size of an U16 in bytes.
3501 This variable contains the C type used for Perl's U16.
3504 This variable is the size of an U32 in bytes.
3507 This variable contains the C type used for Perl's U32.
3510 This variable is the size of an U64 in bytes.
3513 This variable contains the C type used for Perl's U64.
3516 This variable is the size of an U8 in bytes.
3519 This variable contains the C type used for Perl's U8.
3522 This variable contains the format string used for printing a Uid_t.
3524 uidsign (uidsign.U):
3525 This variable contains the signedness of a uidtype.
3526 1 for unsigned, -1 for signed.
3528 uidsize (uidsize.U):
3529 This variable contains the size of a uidtype in bytes.
3531 uidtype (uidtype.U):
3532 This variable defines Uid_t to be something like uid_t, int,
3533 ushort, or whatever type is used to declare user ids in the kernel.
3536 This variable is used internally by Configure to determine the
3537 full pathname (if any) of the uname program. After Configure runs,
3538 the value is reset to a plain "uname" and is not useful.
3541 This variable is used internally by Configure to determine the
3542 full pathname (if any) of the uniq program. After Configure runs,
3543 the value is reset to a plain "uniq" and is not useful.
3545 uquadtype (quadtype.U):
3546 This variable defines Uquad_t to be something like unsigned long,
3547 unsigned int, unsigned long long, uint64_t, or whatever type is
3548 used for 64-bit integers.
3550 use5005threads (usethreads.U):
3551 This variable conditionally defines the USE_5005THREADS symbol,
3552 and indicates that Perl should be built to use the 5.005-based
3553 threading implementation.
3555 use64bitall (use64bits.U):
3556 This variable conditionally defines the USE_64_BIT_ALL symbol,
3557 and indicates that 64-bit integer types should be used
3558 when available. The maximal possible
3559 64-bitness is employed: LP64 or ILP64, meaning that you will
3560 be able to use more than 2 gigabytes of memory. This mode is
3561 even more binary incompatible than USE_64_BIT_INT. You may not
3562 be able to run the resulting executable in a 32-bit CPU at all or
3563 you may need at least to reboot your OS to 64-bit mode.
3565 use64bitint (use64bits.U):
3566 This variable conditionally defines the USE_64_BIT_INT symbol,
3567 and indicates that 64-bit integer types should be used
3568 when available. The minimal possible 64-bitness
3569 is employed, just enough to get 64-bit integers into Perl.
3570 This may mean using for example "long longs", while your memory
3571 may still be limited to 2 gigabytes.
3574 This variable indicates if the system supports dynamic
3575 loading of some sort. See also dlsrc and dlobj.
3577 useithreads (usethreads.U):
3578 This variable conditionally defines the USE_ITHREADS symbol,
3579 and indicates that Perl should be built to use the interpreter-based
3580 threading implementation.
3582 uselargefiles (uselfs.U):
3583 This variable conditionally defines the USE_LARGE_FILES symbol,
3584 and indicates that large file interfaces should be used when
3587 uselongdouble (uselongdbl.U):
3588 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3589 and indicates that long doubles should be used when available.
3591 usemorebits (usemorebits.U):
3592 This variable conditionally defines the USE_MORE_BITS symbol,
3593 and indicates that explicit 64-bit interfaces and long doubles
3594 should be used when available.
3596 usemultiplicity (usemultiplicity.U):
3597 This variable conditionally defines the MULTIPLICITY symbol,
3598 and indicates that Perl should be built to use multiplicity.
3600 usemymalloc (mallocsrc.U):
3601 This variable contains y if the malloc that comes with this package
3602 is desired over the system's version of malloc. People often include
3603 special versions of malloc for effiency, but such versions are often
3604 less portable. See also mallocsrc and mallocobj.
3605 If this is 'y', then -lmalloc is removed from $libs.
3608 This variable contains 'true' or 'false' depending whether the
3609 nm extraction is wanted or not.
3611 useopcode (Extensions.U):
3612 This variable holds either 'true' or 'false' to indicate
3613 whether the Opcode extension should be used. The sole
3614 use for this currently is to allow an easy mechanism
3615 for users to skip the Opcode extension from the Configure
3618 useperlio (useperlio.U):
3619 This variable conditionally defines the USE_PERLIO symbol,
3620 and indicates that the PerlIO abstraction should be
3623 useposix (Extensions.U):
3624 This variable holds either 'true' or 'false' to indicate
3625 whether the POSIX extension should be used. The sole
3626 use for this currently is to allow an easy mechanism
3627 for hints files to indicate that POSIX will not compile
3628 on a particular system.
3631 This variable is set to true when the user agrees to use sfio.
3632 It is set to false when sfio is not available or when the user
3633 explicitely requests not to use sfio. It is here primarily so
3634 that command-line settings can override the auto-detection of
3635 d_sfio without running into a "WHOA THERE".
3637 useshrplib (libperl.U):
3638 This variable is set to 'yes' if the user wishes
3639 to build a shared libperl, and 'no' otherwise.
3641 usesocks (usesocks.U):
3642 This variable conditionally defines the USE_SOCKS symbol,
3643 and indicates that Perl should be built to use SOCKS.
3645 usethreads (usethreads.U):
3646 This variable conditionally defines the USE_THREADS symbol,
3647 and indicates that Perl should be built to use threads.
3649 usevendorprefix (vendorprefix.U):
3650 This variable tells whether the vendorprefix
3651 and consequently other vendor* paths are in use.
3653 usevfork (d_vfork.U):
3654 This variable is set to true when the user accepts to use vfork.
3655 It is set to false when no vfork is available or when the user
3656 explicitely requests not to use vfork.
3659 This variable holds the path of the include files, which is
3660 usually /usr/include. It is mainly used by other Configure units.
3663 This variable is defined but not used by Configure.
3664 The value is a plain '' and is not useful.
3666 uvoformat (perlxvf.U):
3667 This variable contains the format string used for printing
3668 a Perl UV as an unsigned octal integer.
3671 This variable is the size of a UV in bytes.
3674 This variable contains the C type used for Perl's UV.
3676 uvuformat (perlxvf.U):
3677 This variable contains the format string used for printing
3678 a Perl UV as an unsigned decimal integer.
3680 uvxformat (perlxvf.U):
3681 This variable contains the format string used for printing
3682 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3684 uvXUformat (perlxvf.U):
3685 This variable contains the format string used for printing
3686 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3688 vendorarch (vendorarch.U):
3689 This variable contains the value of the PERL_VENDORARCH symbol.
3690 It may have a ~ on the front.
3691 The standard distribution will put nothing in this directory.
3692 Vendors who distribute perl may wish to place their own
3693 architecture-dependent modules and extensions in this directory with
3694 MakeMaker Makefile.PL INSTALLDIRS=vendor
3695 or equivalent. See INSTALL for details.
3697 vendorarchexp (vendorarch.U):
3698 This variable is the ~name expanded version of vendorarch, so that you
3699 may use it directly in Makefiles or shell scripts.
3701 vendorbin (vendorbin.U):
3702 This variable contains the eventual value of the VENDORBIN symbol.
3703 It may have a ~ on the front.
3704 The standard distribution will put nothing in this directory.
3705 Vendors who distribute perl may wish to place additional
3706 binaries in this directory with
3707 MakeMaker Makefile.PL INSTALLDIRS=vendor
3708 or equivalent. See INSTALL for details.
3710 vendorbinexp (vendorbin.U):
3711 This variable is the ~name expanded version of vendorbin, so that you
3712 may use it directly in Makefiles or shell scripts.
3714 vendorlib (vendorlib.U):
3715 This variable contains the eventual value of the VENDORLIB symbol,
3716 which is the name of the private library for this package.
3717 The standard distribution will put nothing in this directory.
3718 Vendors who distribute perl may wish to place their own
3719 modules in this directory with
3720 MakeMaker Makefile.PL INSTALLDIRS=vendor
3721 or equivalent. See INSTALL for details.
3723 vendorlib_stem (vendorlib.U):
3724 This variable is $vendorlibexp with any trailing version-specific component
3725 removed. The elements in inc_version_list (inc_version_list.U) can
3726 be tacked onto this variable to generate a list of directories to search.
3728 vendorlibexp (vendorlib.U):
3729 This variable is the ~name expanded version of vendorlib, so that you
3730 may use it directly in Makefiles or shell scripts.
3732 vendorprefix (vendorprefix.U):
3733 This variable holds the full absolute path of the directory below
3734 which the vendor will install add-on packages.
3735 See INSTALL for usage and examples.
3737 vendorprefixexp (vendorprefix.U):
3738 This variable holds the full absolute path of the directory below
3739 which the vendor will install add-on packages. Derived from vendorprefix.
3741 version (patchlevel.U):
3742 The full version number of this package, such as 5.6.1 (or 5_6_1).
3743 This combines revision, patchlevel, and subversion to get the
3744 full version number, including any possible subversions.
3745 This is suitable for use as a directory name, and hence is
3746 filesystem dependent.
3748 versiononly (versiononly.U):
3749 If set, this symbol indicates that only the version-specific
3750 components of a perl installation should be installed.
3751 This may be useful for making a test installation of a new
3752 version without disturbing the existing installation.
3753 Setting versiononly is equivalent to setting installperl's -v option.
3754 In particular, the non-versioned scripts and programs such as
3755 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3756 (see INSTALL for a more complete list). Nor are the man
3758 Usually, this is undef.
3761 This variable is defined but not used by Configure.
3762 The value is a plain '' and is not useful.
3764 voidflags (voidflags.U):
3765 This variable contains the eventual value of the VOIDFLAGS symbol,
3766 which indicates how much support of the void type is given by this
3767 compiler. See VOIDFLAGS for more info.
3770 This variable holds extra path (space-separated) used to find
3771 libraries on this platform, for example CPU-specific libraries
3772 (on multi-CPU platforms) may be listed here.
3774 xs_apiversion (xs_apiversion.U):
3775 This variable contains the version of the oldest perl binary
3776 compatible with the present perl. perl.c:incpush() and
3777 lib/lib.pm will automatically search in $sitearch for older
3778 directories across major versions back to xs_apiversion.
3779 This is only useful if you have a perl library directory tree
3780 structured like the default one.
3781 See INSTALL for how this works.
3782 The versioned site_perl directory was introduced in 5.005,
3783 so that is the lowest possible value.
3784 Since this can depend on compile time options (such as
3785 bincompat) it is set by Configure. Other non-default sources
3786 of potential incompatibility, such as multiplicity, threads,
3787 debugging, 64bits, sfio, etc., are not checked for currently,
3788 though in principle we could go snooping around in old
3792 This variable holds the name of the compiler compiler we
3793 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3796 This variable contains any additional yacc flags desired by the
3797 user. It is up to the Makefile to use this.
3800 This variable is defined but not used by Configure.
3801 The value is a plain '' and is not useful.
3804 This variable is used internally by Configure to determine the
3805 full pathname (if any) of the zip program. After Configure runs,
3806 the value is reset to a plain "zip" and is not useful.