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.]
7 CONFIGDOTSH (Oldsyms.U):
8 This is set to 'true' in config.sh so that a shell script
9 sourcing config.sh can tell if it has been sourced already.
12 This variable is used internally by Configure to determine the
13 full pathname (if any) of the Mcc program. After Configure runs,
14 the value is reset to a plain "Mcc" and is not useful.
16 PERL_APIVERSION (Oldsyms.U):
17 This value is manually set in patchlevel.h and is used
18 to set the Configure apiversion variable.
20 PERL_REVISION (Oldsyms.U):
21 In a Perl version number such as 5.6.2, this is the 5.
22 This value is manually set in patchlevel.h
24 PERL_SUBVERSION (Oldsyms.U):
25 In a Perl version number such as 5.6.2, this is the 2.
26 Values greater than 50 represent potentially unstable
27 development subversions.
28 This value is manually set in patchlevel.h
30 PERL_VERSION (Oldsyms.U):
31 In a Perl version number such as 5.6.2, this is the 6.
32 This value is manually set in patchlevel.h
35 This variable defines the extension used for ordinary libraries.
36 For unix, it is '.a'. The '.' is included. Other possible
37 values include '.lib'.
40 This variable defines the extension used for executable files.
41 For unix it is empty. Other possible values include '.exe'.
44 This variable defines the extension used for object files.
45 For unix, it is '.o'. The '.' is included. Other possible
46 values include '.obj'.
49 This variable is set to 'true' if AFS (Andrew File System) is used
50 on the system, 'false' otherwise. It is possible to override this
51 with a hint value or command line option, but you'd better know
54 alignbytes (alignbytes.U):
55 This variable holds the number of bytes required to align a
56 double. Usual values are 2, 4 and 8.
58 ansi2knr (ansi2knr.U):
59 This variable is set if the user needs to run ansi2knr.
60 Currently, this is not supported, so we just abort.
62 aphostname (d_gethname.U):
63 This variable contains the command which can be used to compute the
64 host name. The command is fully qualified by its absolute path, to make
65 it safe when used by a process with super-user privileges.
67 apiversion (patchlevel.U):
68 MakeMaker will install add-on modules in a directory with the
69 PERL_APIVERSION version number. The value is set manually in
70 patchlevel.h. Normally, for maintenance releases, this is
71 just something like 5.005 or 5.6 or 5.7. That is, it does not
72 include the subversion number and does not change across
73 maintenance releases. This is so that add-on extensions can
74 be shared across maintenance versions. It is unclear how this
75 ought to work for developer versions. If a release breaks
76 binary compatibility, this number should be increased.
79 This variable is used internally by Configure to determine the
80 full pathname (if any) of the ar program. After Configure runs,
81 the value is reset to a plain "ar" and is not useful.
84 This variable holds the name of the directory in which the user wants
85 to put architecture-dependent public library files for $package.
86 It is most often a local directory such as /usr/local/lib.
87 Programs using this variable must be prepared to deal
88 with filename expansion.
90 archlibexp (archlib.U):
91 This variable is the same as the archlib variable, but is
92 filename expanded at configuration time, for convenient use.
94 archname64 (use64bits.U):
95 This variable is used for the 64-bitness part of $archname.
97 archname (archname.U):
98 This variable is a short name to characterize the current
99 architecture. It is used mainly to construct the default archlib.
102 This variable defines any additional objects that must be linked
103 in with the program on this architecture. On unix, it is usually
104 empty. It is typically used to include emulations of unix calls
105 or other facilities. For perl on OS/2, for example, this would
109 This variable is used internally by Configure to determine the
110 full pathname (if any) of the awk program. After Configure runs,
111 the value is reset to a plain "awk" and is not useful.
114 The base revision level of this package, from the .package file.
117 This variable is defined but not used by Configure.
118 The value is a plain '' and is not useful.
121 This variable holds the name of the directory in which the user wants
122 to put publicly executable images for the package in question. It
123 is most often a local directory such as /usr/local/bin. Programs using
124 this variable must be prepared to deal with ~name substitution.
126 bincompat5005 (bincompat5005.U):
127 This variable contains y if Perl 5.006 should be binary-compatible
131 This is the same as the bin variable, but is filename expanded at
132 configuration time, for use in your makefiles.
135 This variable is defined but not used by Configure.
136 The value is a plain '' and is not useful.
139 This variable is used internally by Configure to determine the
140 full pathname (if any) of the byacc program. After Configure runs,
141 the value is reset to a plain "byacc" and is not useful.
143 byteorder (byteorder.U):
144 This variable holds the byte order. In the following, larger digits
145 indicate more significance. The variable byteorder is either 4321
146 on a big-endian machine, or 1234 on a little-endian, or 87654321
147 on a Cray ... or 3412 with weird order !
150 This variable contains the \c string if that is what causes the echo
151 command to suppress newline. Otherwise it is null. Correct usage is
152 $echo $n "prompt for a question: $c".
154 castflags (d_castneg.U):
155 This variable contains a flag that precise difficulties the
156 compiler has casting odd floating values to unsigned long:
158 1 = couldn't cast < 0
159 2 = couldn't cast >= 0x80000000
160 4 = couldn't cast in argument expression list
163 This variable is used internally by Configure to determine the
164 full pathname (if any) of the cat program. After Configure runs,
165 the value is reset to a plain "cat" and is not useful.
168 This variable holds the name of a command to execute a C compiler which
169 can resolve multiple global references that happen to have the same
170 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
172 cccdlflags (dlsrc.U):
173 This variable contains any special flags that might need to be
174 passed with 'cc -c' to compile modules to be used to create a shared
175 library that will be used for dynamic loading. For hpux, this
176 should be +z. It is up to the makefile to use it.
179 This variable contains any special flags that might need to be
180 passed to cc to link with a shared library for dynamic loading.
181 It is up to the makefile to use it. For sunos 4.1, it should
185 This variable contains any additional C compiler flags desired by
186 the user. It is up to the Makefile to use this.
188 ccsymbols (Cppsym.U):
189 The variable contains the symbols defined by the C compiler alone.
190 The symbols defined by cpp or by cc when it calls cpp are not in
191 this list, see cppsymbols and cppccsymbols.
192 The list is a space-separated list of symbol=value tokens.
195 Login name of the person who ran the Configure script and answered the
196 questions. This is used to tag both config.sh and config_h.SH.
198 cf_email (cf_email.U):
199 Electronic mail address of the person who ran Configure. This can be
200 used by units that require the user's e-mail, like MailList.U.
203 Holds the output of the "date" command when the configuration file was
204 produced. This is used to tag both config.sh and config_h.SH.
206 charsize (charsize.U):
207 This variable contains the value of the CHARSIZE symbol, which
208 indicates to the C program how many bytes there are in a character.
211 This variable is defined but not used by Configure.
212 The value is a plain '' and is not useful.
215 This variable is defined but not used by Configure.
216 The value is a plain '' and is not useful.
219 This variable is defined but not used by Configure.
220 The value is a plain '' and is not useful.
222 clocktype (d_times.U):
223 This variable holds the type returned by times(). It can be long,
224 or clock_t on BSD sites (in which case <sys/types.h> should be
228 This variable is used internally by Configure to determine the
229 full pathname (if any) of the comm program. After Configure runs,
230 the value is reset to a plain "comm" and is not useful.
233 This variable is defined but not used by Configure.
234 The value is a plain '' and is not useful.
236 contains (contains.U):
237 This variable holds the command to do a grep with a proper return
238 status. On most sane systems it is simply "grep". On insane systems
239 it is a grep followed by a cat followed by a test. This variable
240 is primarily for the use of other Configure units.
243 This variable is used internally by Configure to determine the
244 full pathname (if any) of the cp program. After Configure runs,
245 the value is reset to a plain "cp" and is not useful.
248 This variable is defined but not used by Configure.
249 The value is a plain '' and is not useful.
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the cpp program. After Configure runs,
254 the value is reset to a plain "cpp" and is not useful.
256 cpp_stuff (cpp_stuff.U):
257 This variable contains an identification of the catenation mechanism
258 used by the C preprocessor.
260 cppccsymbols (Cppsym.U):
261 The variable contains the symbols defined by the C compiler when
262 when it calls cpp. The symbols defined by the cc alone or cpp
263 alone are not in this list, see ccsymbols and cppsymbols.
264 The list is a space-separated list of symbol=value tokens.
266 cppflags (ccflags.U):
267 This variable holds the flags that will be passed to the C pre-
268 processor. It is up to the Makefile to use it.
270 cpplast (cppstdin.U):
271 This variable has the same functionality as cppminus, only it applies
272 to cpprun and not cppstdin.
274 cppminus (cppstdin.U):
275 This variable contains the second part of the string which will invoke
276 the C preprocessor on the standard input and produce to standard
277 output. This variable will have the value "-" if cppstdin needs
278 a minus to specify standard input, otherwise the value is "".
281 This variable contains the command which will invoke a C preprocessor
282 on standard input and put the output to stdout. It is guaranteed not
283 to be a wrapper and may be a null string if no preprocessor can be
284 made directly available. This preprocessor might be different from the
285 one used by the C compiler. Don't forget to append cpplast after the
286 preprocessor options.
288 cppstdin (cppstdin.U):
289 This variable contains the command which will invoke the C
290 preprocessor on standard input and put the output to stdout.
291 It is primarily used by other Configure units that ask about
292 preprocessor symbols.
294 cppsymbols (Cppsym.U):
295 The variable contains the symbols defined by the C preprocessor
296 alone. The symbols defined by cc or by cc when it calls cpp are
297 not in this list, see ccsymbols and cppccsymbols.
298 The list is a space-separated list of symbol=value tokens.
300 crosscompile (crosscompile.U):
301 This variable conditionally defines the CROSSCOMPILE symbol
302 which signifies that the build process is be a cross-compilation.
303 This is normally set by hints files or from Configure command line.
305 cryptlib (d_crypt.U):
306 This variable holds -lcrypt or the path to a libcrypt.a archive if
307 the crypt() function is not defined in the standard C library. It is
308 up to the Makefile to use this.
311 This variable is used internally by Configure to determine the
312 full pathname (if any) of the csh program. After Configure runs,
313 the value is reset to a plain "csh" and is not useful.
315 d_Gconvert (d_gconvert.U):
316 This variable holds what Gconvert is defined as to convert
317 floating point numbers into strings. It could be 'gconvert'
318 or a more complex macro emulating gconvert with gcvt() or sprintf.
320 d_Gconvert='gconvert((x),(n),(t),(b))'
321 d_Gconvert='gcvt((x),(n),(b))'
322 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
324 d_PRIEldbl (longdblfio.U):
325 This variable conditionally defines the PERL_PRIfldlbl symbol, which
326 indiciates that stdio has a symbol to print long doubles.
328 d_PRIFldbl (longdblfio.U):
329 This variable conditionally defines the PERL_PRIfldlbl symbol, which
330 indiciates that stdio has a symbol to print long doubles.
332 d_PRIGldbl (longdblfio.U):
333 This variable conditionally defines the PERL_PRIfldlbl symbol, which
334 indiciates that stdio has a symbol to print long doubles.
336 d_PRIX64 (quadfio.U):
337 This variable conditionally defines the PERL_PRIX64 symbol, which
338 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
340 d_PRId64 (quadfio.U):
341 This variable conditionally defines the PERL_PRId64 symbol, which
342 indiciates that stdio has a symbol to print 64-bit decimal numbers.
344 d_PRIeldbl (longdblfio.U):
345 This variable conditionally defines the PERL_PRIfldlbl symbol, which
346 indiciates that stdio has a symbol to print long doubles.
348 d_PRIfldbl (longdblfio.U):
349 This variable conditionally defines the PERL_PRIfldlbl symbol, which
350 indiciates that stdio has a symbol to print long doubles.
352 d_PRIgldbl (longdblfio.U):
353 This variable conditionally defines the PERL_PRIfldlbl symbol, which
354 indiciates that stdio has a symbol to print long doubles.
356 d_PRIi64 (quadfio.U):
357 This variable conditionally defines the PERL_PRIi64 symbol, which
358 indiciates that stdio has a symbol to print 64-bit decimal numbers.
360 d_PRIo64 (quadfio.U):
361 This variable conditionally defines the PERL_PRIo64 symbol, which
362 indiciates that stdio has a symbol to print 64-bit octal numbers.
364 d_PRIu64 (quadfio.U):
365 This variable conditionally defines the PERL_PRIu64 symbol, which
366 indiciates that stdio has a symbol to print 64-bit unsigned decimal
369 d_PRIx64 (quadfio.U):
370 This variable conditionally defines the PERL_PRIx64 symbol, which
371 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
373 d_access (d_access.U):
374 This variable conditionally defines HAS_ACCESS if the access() system
375 call is available to check for access permissions using real IDs.
377 d_accessx (d_accessx.U):
378 This variable conditionally defines the HAS_ACCESSX symbol, which
379 indicates to the C program that the accessx() routine is available.
382 This variable conditionally defines the HAS_ALARM symbol, which
383 indicates to the C program that the alarm() routine is available.
385 d_archlib (archlib.U):
386 This variable conditionally defines ARCHLIB to hold the pathname
387 of architecture-dependent library files for $package. If
388 $archlib is the same as $privlib, then this is set to undef.
391 This variable conditionally defines the HAS_ATOLF symbol, which
392 indicates to the C program that the atolf() routine is available.
395 This variable conditionally defines the HAS_ATOLL symbol, which
396 indicates to the C program that the atoll() routine is available.
398 d_attribut (d_attribut.U):
399 This variable conditionally defines HASATTRIBUTE, which
400 indicates the C compiler can check for function attributes,
401 such as printf formats.
404 This variable conditionally defines the HAS_BCMP symbol if
405 the bcmp() routine is available to compare strings.
408 This variable conditionally defines the HAS_BCOPY symbol if
409 the bcopy() routine is available to copy strings.
411 d_bincompat5005 (bincompat5005.U):
412 This variable conditionally defines BINCOMPAT5005 so that embed.h
413 can take special action if Perl 5.006 should be binary-compatible
414 with Perl 5.005. This is impossible for builds that use features
415 like threads and multiplicity it is always $undef for those versions.
418 This symbol conditionally defines the symbol BSD when running on a
421 d_bsdgetpgrp (d_getpgrp.U):
422 This variable conditionally defines USE_BSD_GETPGRP if
423 getpgrp needs one arguments whereas USG one needs none.
425 d_bsdsetpgrp (d_setpgrp.U):
426 This variable conditionally defines USE_BSD_SETPGRP if
427 setpgrp needs two arguments whereas USG one needs none.
428 See also d_setpgid for a POSIX interface.
431 This variable conditionally defines the HAS_BZERO symbol if
432 the bzero() routine is available to set memory to 0.
434 d_casti32 (d_casti32.U):
435 This variable conditionally defines CASTI32, which indicates
436 whether the C compiler can cast large floats to 32-bit ints.
438 d_castneg (d_castneg.U):
439 This variable conditionally defines CASTNEG, which indicates
440 wether the C compiler can cast negative float to unsigned.
442 d_charvspr (d_vprintf.U):
443 This variable conditionally defines CHARVSPRINTF if this system
444 has vsprintf returning type (char*). The trend seems to be to
445 declare it as "int vsprintf()".
448 This variable conditionally defines the HAS_CHOWN symbol, which
449 indicates to the C program that the chown() routine is available.
451 d_chroot (d_chroot.U):
452 This variable conditionally defines the HAS_CHROOT symbol, which
453 indicates to the C program that the chroot() routine is available.
455 d_chsize (d_chsize.U):
456 This variable conditionally defines the CHSIZE symbol, which
457 indicates to the C program that the chsize() routine is available
458 to truncate files. You might need a -lx to get this routine.
460 d_closedir (d_closedir.U):
461 This variable conditionally defines HAS_CLOSEDIR if closedir() is
465 This variable conditionally defines the HASCONST symbol, which
466 indicates to the C program that this C compiler knows about the
470 This variable conditionally defines the CRYPT symbol, which
471 indicates to the C program that the crypt() routine is available
472 to encrypt passwords and the like.
475 This variable conditionally defines the CSH symbol, which
476 indicates to the C program that the C-shell exists.
478 d_cuserid (d_cuserid.U):
479 This variable conditionally defines the HAS_CUSERID symbol, which
480 indicates to the C program that the cuserid() routine is available
481 to get character login names.
483 d_dbl_dig (d_dbl_dig.U):
484 This variable conditionally defines d_dbl_dig if this system's
485 header files provide DBL_DIG, which is the number of significant
486 digits in a double precision number.
488 d_difftime (d_difftime.U):
489 This variable conditionally defines the HAS_DIFFTIME symbol, which
490 indicates to the C program that the difftime() routine is available.
492 d_dirnamlen (i_dirent.U):
493 This variable conditionally defines DIRNAMLEN, which indicates
494 to the C program that the length of directory entry names is
495 provided by a d_namelen field.
497 d_dlerror (d_dlerror.U):
498 This variable conditionally defines the HAS_DLERROR symbol, which
499 indicates to the C program that the dlerror() routine is available.
501 d_dlopen (d_dlopen.U):
502 This variable conditionally defines the HAS_DLOPEN symbol, which
503 indicates to the C program that the dlopen() routine is available.
505 d_dlsymun (d_dlsymun.U):
506 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
507 indicates that we need to prepend an underscore to the symbol
508 name before calling dlsym().
510 d_dosuid (d_dosuid.U):
511 This variable conditionally defines the symbol DOSUID, which
512 tells the C program that it should insert setuid emulation code
513 on hosts which have setuid #! scripts disabled.
515 d_drand48proto (d_drand48proto.U):
516 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
517 which indicates to the C program that the system provides
518 a prototype for the drand48() function. Otherwise, it is
519 up to the program to supply one.
522 This variable conditionally defines HAS_DUP2 if dup2() is
523 available to duplicate file descriptors.
525 d_eaccess (d_eaccess.U):
526 This variable conditionally defines the HAS_EACCESS symbol, which
527 indicates to the C program that the eaccess() routine is available.
529 d_endgrent (d_endgrent.U):
530 This variable conditionally defines the HAS_ENDGRENT symbol, which
531 indicates to the C program that the endgrent() routine is available
532 for sequential access of the group database.
534 d_endhent (d_endhent.U):
535 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
536 available to close whatever was being used for host queries.
538 d_endnent (d_endnent.U):
539 This variable conditionally defines HAS_ENDNETENT if endnetent() is
540 available to close whatever was being used for network queries.
542 d_endpent (d_endpent.U):
543 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
544 available to close whatever was being used for protocol queries.
546 d_endpwent (d_endpwent.U):
547 This variable conditionally defines the HAS_ENDPWENT symbol, which
548 indicates to the C program that the endpwent() routine is available
549 for sequential access of the passwd database.
551 d_endsent (d_endsent.U):
552 This variable conditionally defines HAS_ENDSERVENT if endservent() is
553 available to close whatever was being used for service queries.
555 d_endspent (d_endspent.U):
556 This variable conditionally defines HAS_ENDSPENT if endspent() is
557 available to finalize the scan of SysV shadow password entries.
559 d_eofnblk (nblock_io.U):
560 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
561 when reading from a non-blocking I/O source.
564 This variable conditionally defines the symbols EUNICE and VAX, which
565 alerts the C program that it must deal with ideosyncracies of VMS.
567 d_fchmod (d_fchmod.U):
568 This variable conditionally defines the HAS_FCHMOD symbol, which
569 indicates to the C program that the fchmod() routine is available
570 to change mode of opened files.
572 d_fchown (d_fchown.U):
573 This variable conditionally defines the HAS_FCHOWN symbol, which
574 indicates to the C program that the fchown() routine is available
575 to change ownership of opened files.
578 This variable conditionally defines the HAS_FCNTL symbol, and indicates
579 whether the fcntl() function exists
581 d_fd_macros (d_fd_set.U):
582 This variable contains the eventual value of the HAS_FD_MACROS symbol,
583 which indicates if your C compiler knows about the macros which
584 manipulate an fd_set.
586 d_fd_set (d_fd_set.U):
587 This variable contains the eventual value of the HAS_FD_SET symbol,
588 which indicates if your C compiler knows about the fd_set typedef.
590 d_fds_bits (d_fd_set.U):
591 This variable contains the eventual value of the HAS_FDS_BITS symbol,
592 which indicates if your fd_set typedef contains the fds_bits member.
593 If you have an fd_set typedef, but the dweebs who installed it did
594 a half-fast job and neglected to provide the macros to manipulate
595 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
597 d_fgetpos (d_fgetpos.U):
598 This variable conditionally defines HAS_FGETPOS if fgetpos() is
599 available to get the file position indicator.
601 d_flexfnam (d_flexfnam.U):
602 This variable conditionally defines the FLEXFILENAMES symbol, which
603 indicates that the system supports filenames longer than 14 characters.
606 This variable conditionally defines HAS_FLOCK if flock() is
607 available to do file locking.
610 This variable conditionally defines the HAS_FORK symbol, which
611 indicates to the C program that the fork() routine is available.
613 d_fpathconf (d_pathconf.U):
614 This variable conditionally defines the HAS_FPATHCONF symbol, which
615 indicates to the C program that the pathconf() routine is available
616 to determine file-system related limits and options associated
617 with a given open file descriptor.
620 This symbol will be defined if the C compiler supports fpos64_t.
622 d_fs_data_s (d_fs_data_s.U):
623 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
624 which indicates that the struct fs_data is supported.
626 d_fseeko (d_fseeko.U):
627 This variable conditionally defines the HAS_FSEEKO symbol, which
628 indicates to the C program that the fseeko() routine is available.
630 d_fsetpos (d_fsetpos.U):
631 This variable conditionally defines HAS_FSETPOS if fsetpos() is
632 available to set the file position indicator.
634 d_fstatfs (d_fstatfs.U):
635 This variable conditionally defines the HAS_FSTATFS symbol, which
636 indicates to the C program that the fstatfs() routine is available.
638 d_fstatvfs (d_statvfs.U):
639 This variable conditionally defines the HAS_FSTATVFS symbol, which
640 indicates to the C program that the fstatvfs() routine is available.
642 d_ftello (d_ftello.U):
643 This variable conditionally defines the HAS_FTELLO symbol, which
644 indicates to the C program that the ftello() routine is available.
647 This variable conditionally defines the HAS_FTIME symbol, which indicates
648 that the ftime() routine exists. The ftime() routine is basically
649 a sub-second accuracy clock.
651 d_getgrent (d_getgrent.U):
652 This variable conditionally defines the HAS_GETGRENT symbol, which
653 indicates to the C program that the getgrent() routine is available
654 for sequential access of the group database.
656 d_getgrps (d_getgrps.U):
657 This variable conditionally defines the HAS_GETGROUPS symbol, which
658 indicates to the C program that the getgroups() routine is available
659 to get the list of process groups.
661 d_gethbyaddr (d_gethbyad.U):
662 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
663 indicates to the C program that the gethostbyaddr() routine is available
664 to look up hosts by their IP addresses.
666 d_gethbyname (d_gethbynm.U):
667 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
668 indicates to the C program that the gethostbyname() routine is available
669 to look up host names in some data base or other.
671 d_gethent (d_gethent.U):
672 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
673 available to look up host names in some data base or another.
675 d_gethname (d_gethname.U):
676 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
677 indicates to the C program that the gethostname() routine may be
678 used to derive the host name.
680 d_gethostprotos (d_gethostprotos.U):
681 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
682 which indicates to the C program that <netdb.h> supplies
683 prototypes for the various gethost*() functions.
684 See also netdbtype.U for probing for various netdb types.
686 d_getlogin (d_getlogin.U):
687 This variable conditionally defines the HAS_GETLOGIN symbol, which
688 indicates to the C program that the getlogin() routine is available
689 to get the login name.
691 d_getmnt (d_getmnt.U):
692 This variable conditionally defines the HAS_GETMNT symbol, which
693 indicates to the C program that the getmnt() routine is available
694 to retrieve one or more mount info blocks by filename.
696 d_getmntent (d_getmntent.U):
697 This variable conditionally defines the HAS_GETMNTENT symbol, which
698 indicates to the C program that the getmntent() routine is available
699 to iterate through mounted files to get their mount info.
701 d_getnbyaddr (d_getnbyad.U):
702 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
703 indicates to the C program that the getnetbyaddr() routine is available
704 to look up networks by their IP addresses.
706 d_getnbyname (d_getnbynm.U):
707 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
708 indicates to the C program that the getnetbyname() routine is available
709 to look up networks by their names.
711 d_getnent (d_getnent.U):
712 This variable conditionally defines HAS_GETNETENT if getnetent() is
713 available to look up network names in some data base or another.
715 d_getnetprotos (d_getnetprotos.U):
716 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
717 which indicates to the C program that <netdb.h> supplies
718 prototypes for the various getnet*() functions.
719 See also netdbtype.U for probing for various netdb types.
721 d_getpbyname (d_getprotby.U):
722 This variable conditionally defines the HAS_GETPROTOBYNAME
723 symbol, which indicates to the C program that the
724 getprotobyname() routine is available to look up protocols
727 d_getpbynumber (d_getprotby.U):
728 This variable conditionally defines the HAS_GETPROTOBYNUMBER
729 symbol, which indicates to the C program that the
730 getprotobynumber() routine is available to look up protocols
733 d_getpent (d_getpent.U):
734 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
735 available to look up protocols in some data base or another.
737 d_getpgid (d_getpgid.U):
738 This variable conditionally defines the HAS_GETPGID symbol, which
739 indicates to the C program that the getpgid(pid) function
740 is available to get the process group id.
742 d_getpgrp2 (d_getpgrp2.U):
743 This variable conditionally defines the HAS_GETPGRP2 symbol, which
744 indicates to the C program that the getpgrp2() (as in DG/UX) routine
745 is available to get the current process group.
747 d_getpgrp (d_getpgrp.U):
748 This variable conditionally defines HAS_GETPGRP if getpgrp() is
749 available to get the current process group.
751 d_getppid (d_getppid.U):
752 This variable conditionally defines the HAS_GETPPID symbol, which
753 indicates to the C program that the getppid() routine is available
754 to get the parent process ID.
756 d_getprior (d_getprior.U):
757 This variable conditionally defines HAS_GETPRIORITY if getpriority()
758 is available to get a process's priority.
760 d_getprotoprotos (d_getprotoprotos.U):
761 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
762 which indicates to the C program that <netdb.h> supplies
763 prototypes for the various getproto*() functions.
764 See also netdbtype.U for probing for various netdb types.
766 d_getpwent (d_getpwent.U):
767 This variable conditionally defines the HAS_GETPWENT symbol, which
768 indicates to the C program that the getpwent() routine is available
769 for sequential access of the passwd database.
771 d_getsbyname (d_getsrvby.U):
772 This variable conditionally defines the HAS_GETSERVBYNAME
773 symbol, which indicates to the C program that the
774 getservbyname() routine is available to look up services
777 d_getsbyport (d_getsrvby.U):
778 This variable conditionally defines the HAS_GETSERVBYPORT
779 symbol, which indicates to the C program that the
780 getservbyport() routine is available to look up services
783 d_getsent (d_getsent.U):
784 This variable conditionally defines HAS_GETSERVENT if getservent() is
785 available to look up network services in some data base or another.
787 d_getservprotos (d_getservprotos.U):
788 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
789 which indicates to the C program that <netdb.h> supplies
790 prototypes for the various getserv*() functions.
791 See also netdbtype.U for probing for various netdb types.
793 d_getspent (d_getspent.U):
794 This variable conditionally defines HAS_GETSPENT if getspent() is
795 available to retrieve SysV shadow password entries sequentially.
797 d_getspnam (d_getspnam.U):
798 This variable conditionally defines HAS_GETSPNAM if getspnam() is
799 available to retrieve SysV shadow password entries by name.
801 d_gettimeod (d_ftime.U):
802 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
803 indicates that the gettimeofday() system call exists (to obtain a
804 sub-second accuracy clock). You should probably include <sys/resource.h>.
806 d_gnulibc (d_gnulibc.U):
807 Defined if we're dealing with the GNU C Library.
809 d_grpasswd (i_grp.U):
810 This variable conditionally defines GRPASSWD, which indicates
811 that struct group in <grp.h> contains gr_passwd.
813 d_hasmntopt (d_hasmntopt.U):
814 This variable conditionally defines the HAS_HASMNTOPT symbol, which
815 indicates to the C program that the hasmntopt() routine is available
816 to query the mount options of file systems.
819 This variable conditionally defines HAS_HTONL if htonl() and its
820 friends are available to do network order byte swapping.
822 d_index (d_strchr.U):
823 This variable conditionally defines HAS_INDEX if index() and
824 rindex() are available for string searching.
826 d_inetaton (d_inetaton.U):
827 This variable conditionally defines the HAS_INET_ATON symbol, which
828 indicates to the C program that the inet_aton() function is available
829 to parse IP address "dotted-quad" strings.
831 d_int64t (d_int64t.U):
832 This symbol will be defined if the C compiler supports int64_t.
834 d_isascii (d_isascii.U):
835 This variable conditionally defines the HAS_ISASCII constant,
836 which indicates to the C program that isascii() is available.
838 d_killpg (d_killpg.U):
839 This variable conditionally defines the HAS_KILLPG symbol, which
840 indicates to the C program that the killpg() routine is available
841 to kill process groups.
843 d_lchown (d_lchown.U):
844 This variable conditionally defines the HAS_LCHOWN symbol, which
845 indicates to the C program that the lchown() routine is available
846 to operate on a symbolic link (instead of following the link).
848 d_ldbl_dig (d_ldbl_dig.U):
849 This variable conditionally defines d_ldbl_dig if this system's
850 header files provide LDBL_DIG, which is the number of significant
851 digits in a long double precision number.
854 This variable conditionally defines HAS_LINK if link() is
855 available to create hard links.
857 d_locconv (d_locconv.U):
858 This variable conditionally defines HAS_LOCALECONV if localeconv() is
859 available for numeric and monetary formatting conventions.
862 This variable conditionally defines HAS_LOCKF if lockf() is
863 available to do file locking.
865 d_longdbl (d_longdbl.U):
866 This variable conditionally defines HAS_LONG_DOUBLE if
867 the long double type is supported.
869 d_longlong (d_longlong.U):
870 This variable conditionally defines HAS_LONG_LONG if
871 the long long type is supported.
874 This variable conditionally defines HAS_LSTAT if lstat() is
875 available to do file stats on symbolic links.
878 This variable conditionally defines the HAS_MBLEN symbol, which
879 indicates to the C program that the mblen() routine is available
880 to find the number of bytes in a multibye character.
882 d_mbstowcs (d_mbstowcs.U):
883 This variable conditionally defines the HAS_MBSTOWCS symbol, which
884 indicates to the C program that the mbstowcs() routine is available
885 to convert a multibyte string into a wide character string.
887 d_mbtowc (d_mbtowc.U):
888 This variable conditionally defines the HAS_MBTOWC symbol, which
889 indicates to the C program that the mbtowc() routine is available
890 to convert multibyte to a wide character.
892 d_memchr (d_memchr.U):
893 This variable conditionally defines the HAS_MEMCHR symbol, which
894 indicates to the C program that the memchr() routine is available
895 to locate characters within a C string.
897 d_memcmp (d_memcmp.U):
898 This variable conditionally defines the HAS_MEMCMP symbol, which
899 indicates to the C program that the memcmp() routine is available
900 to compare blocks of memory.
902 d_memcpy (d_memcpy.U):
903 This variable conditionally defines the HAS_MEMCPY symbol, which
904 indicates to the C program that the memcpy() routine is available
905 to copy blocks of memory.
907 d_memmove (d_memmove.U):
908 This variable conditionally defines the HAS_MEMMOVE symbol, which
909 indicates to the C program that the memmove() routine is available
910 to copy potentatially overlapping blocks of memory.
912 d_memset (d_memset.U):
913 This variable conditionally defines the HAS_MEMSET symbol, which
914 indicates to the C program that the memset() routine is available
915 to set blocks of memory.
918 This variable conditionally defines the HAS_MKDIR symbol, which
919 indicates to the C program that the mkdir() routine is available
920 to create directories..
922 d_mkfifo (d_mkfifo.U):
923 This variable conditionally defines the HAS_MKFIFO symbol, which
924 indicates to the C program that the mkfifo() routine is available.
926 d_mktime (d_mktime.U):
927 This variable conditionally defines the HAS_MKTIME symbol, which
928 indicates to the C program that the mktime() routine is available.
931 This variable conditionally defines the HAS_MSG symbol, which
932 indicates that the entire msg*(2) library is present.
934 d_msg_ctrunc (d_socket.U):
935 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
936 which indicates that the MSG_CTRUNC is available. #ifdef is
937 not enough because it may be an enum, glibc has been known to do this.
939 d_msg_dontroute (d_socket.U):
940 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
941 which indicates that the MSG_DONTROUTE is available. #ifdef is
942 not enough because it may be an enum, glibc has been known to do this.
944 d_msg_oob (d_socket.U):
945 This variable conditionally defines the HAS_MSG_OOB symbol,
946 which indicates that the MSG_OOB is available. #ifdef is
947 not enough because it may be an enum, glibc has been known to do this.
949 d_msg_peek (d_socket.U):
950 This variable conditionally defines the HAS_MSG_PEEK symbol,
951 which indicates that the MSG_PEEK is available. #ifdef is
952 not enough because it may be an enum, glibc has been known to do this.
954 d_msg_proxy (d_socket.U):
955 This variable conditionally defines the HAS_MSG_PROXY symbol,
956 which indicates that the MSG_PROXY is available. #ifdef is
957 not enough because it may be an enum, glibc has been known to do this.
959 d_msgctl (d_msgctl.U):
960 This variable conditionally defines the HAS_MSGCTL symbol, which
961 indicates to the C program that the msgctl() routine is available.
963 d_msgget (d_msgget.U):
964 This variable conditionally defines the HAS_MSGGET symbol, which
965 indicates to the C program that the msgget() routine is available.
967 d_msgrcv (d_msgrcv.U):
968 This variable conditionally defines the HAS_MSGRCV symbol, which
969 indicates to the C program that the msgrcv() routine is available.
971 d_msgsnd (d_msgsnd.U):
972 This variable conditionally defines the HAS_MSGSND symbol, which
973 indicates to the C program that the msgsnd() routine is available.
975 d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
981 This variable conditionally defines the HAS_NICE symbol, which
982 indicates to the C program that the nice() routine is available.
985 This symbol will be defined if the C compiler supports off64_t.
987 d_old_pthread_create_joinable (d_pthrattrj.U):
988 This variable conditionally defines pthread_create_joinable.
989 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
991 d_oldpthreads (usethreads.U):
992 This variable conditionally defines the OLD_PTHREADS_API symbol,
993 and indicates that Perl should be built to use the old
994 draft POSIX threads API. This is only potentially meaningful if
997 d_oldsock (d_socket.U):
998 This variable conditionally defines the OLDSOCKET symbol, which
999 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1001 d_open3 (d_open3.U):
1002 This variable conditionally defines the HAS_OPEN3 manifest constant,
1003 which indicates to the C program that the 3 argument version of
1004 the open(2) function is available.
1006 d_pathconf (d_pathconf.U):
1007 This variable conditionally defines the HAS_PATHCONF symbol, which
1008 indicates to the C program that the pathconf() routine is available
1009 to determine file-system related limits and options associated
1010 with a given filename.
1012 d_pause (d_pause.U):
1013 This variable conditionally defines the HAS_PAUSE symbol, which
1014 indicates to the C program that the pause() routine is available
1015 to suspend a process until a signal is received.
1017 d_phostname (d_gethname.U):
1018 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1019 contains the shell command which, when fed to popen(), may be
1020 used to derive the host name.
1023 This variable conditionally defines the HAS_PIPE symbol, which
1024 indicates to the C program that the pipe() routine is available
1025 to create an inter-process channel.
1028 This variable conditionally defines the HAS_POLL symbol, which
1029 indicates to the C program that the poll() routine is available
1030 to poll active file descriptors.
1032 d_portable (d_portable.U):
1033 This variable conditionally defines the PORTABLE symbol, which
1034 indicates to the C program that it should not assume that it is
1035 running on the machine it was compiled on.
1037 d_pthread_yield (d_pthread_y.U):
1038 This variable conditionally defines the HAS_PTHREAD_YIELD
1039 symbol if the pthread_yield routine is available to yield
1040 the execution of the current thread.
1043 This variable conditionally defines PWAGE, which indicates
1044 that struct passwd contains pw_age.
1046 d_pwchange (i_pwd.U):
1047 This variable conditionally defines PWCHANGE, which indicates
1048 that struct passwd contains pw_change.
1050 d_pwclass (i_pwd.U):
1051 This variable conditionally defines PWCLASS, which indicates
1052 that struct passwd contains pw_class.
1054 d_pwcomment (i_pwd.U):
1055 This variable conditionally defines PWCOMMENT, which indicates
1056 that struct passwd contains pw_comment.
1058 d_pwexpire (i_pwd.U):
1059 This variable conditionally defines PWEXPIRE, which indicates
1060 that struct passwd contains pw_expire.
1062 d_pwgecos (i_pwd.U):
1063 This variable conditionally defines PWGECOS, which indicates
1064 that struct passwd contains pw_gecos.
1066 d_pwpasswd (i_pwd.U):
1067 This variable conditionally defines PWPASSWD, which indicates
1068 that struct passwd contains pw_passwd.
1070 d_pwquota (i_pwd.U):
1071 This variable conditionally defines PWQUOTA, which indicates
1072 that struct passwd contains pw_quota.
1074 d_quad (quadtype.U):
1075 This variable, if defined, tells that there's a 64-bit integer type,
1078 d_readdir (d_readdir.U):
1079 This variable conditionally defines HAS_READDIR if readdir() is
1080 available to read directory entries.
1082 d_readlink (d_readlink.U):
1083 This variable conditionally defines the HAS_READLINK symbol, which
1084 indicates to the C program that the readlink() routine is available
1085 to read the value of a symbolic link.
1087 d_rename (d_rename.U):
1088 This variable conditionally defines the HAS_RENAME symbol, which
1089 indicates to the C program that the rename() routine is available
1092 d_rewinddir (d_readdir.U):
1093 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1096 d_rmdir (d_rmdir.U):
1097 This variable conditionally defines HAS_RMDIR if rmdir() is
1098 available to remove directories.
1100 d_safebcpy (d_safebcpy.U):
1101 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1102 the bcopy() routine can do overlapping copies.
1104 d_safemcpy (d_safemcpy.U):
1105 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1106 the memcpy() routine can do overlapping copies.
1108 d_sanemcmp (d_sanemcmp.U):
1109 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1110 the memcpy() routine is available and can be used to compare relative
1111 magnitudes of chars with their high bits set.
1113 d_sched_yield (d_pthread_y.U):
1114 This variable conditionally defines the HAS_SCHED_YIELD
1115 symbol if the sched_yield routine is available to yield
1116 the execution of the current thread.
1118 d_scm_rights (d_socket.U):
1119 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1120 which indicates that the SCM_RIGHTS is available. #ifdef is
1121 not enough because it may be an enum, glibc has been known to do this.
1123 d_seekdir (d_readdir.U):
1124 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1127 d_select (d_select.U):
1128 This variable conditionally defines HAS_SELECT if select() is
1129 available to select active file descriptors. A <sys/time.h>
1130 inclusion may be necessary for the timeout field.
1133 This variable conditionally defines the HAS_SEM symbol, which
1134 indicates that the entire sem*(2) library is present.
1136 d_semctl (d_semctl.U):
1137 This variable conditionally defines the HAS_SEMCTL symbol, which
1138 indicates to the C program that the semctl() routine is available.
1140 d_semctl_semid_ds (d_union_semun.U):
1141 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1142 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1144 d_semctl_semun (d_union_semun.U):
1145 This variable conditionally defines USE_SEMCTL_SEMUN, which
1146 indicates that union semun is to be used for semctl IPC_STAT.
1148 d_semget (d_semget.U):
1149 This variable conditionally defines the HAS_SEMGET symbol, which
1150 indicates to the C program that the semget() routine is available.
1152 d_semop (d_semop.U):
1153 This variable conditionally defines the HAS_SEMOP symbol, which
1154 indicates to the C program that the semop() routine is available.
1156 d_setegid (d_setegid.U):
1157 This variable conditionally defines the HAS_SETEGID symbol, which
1158 indicates to the C program that the setegid() routine is available
1159 to change the effective gid of the current program.
1161 d_seteuid (d_seteuid.U):
1162 This variable conditionally defines the HAS_SETEUID symbol, which
1163 indicates to the C program that the seteuid() routine is available
1164 to change the effective uid of the current program.
1166 d_setgrent (d_setgrent.U):
1167 This variable conditionally defines the HAS_SETGRENT symbol, which
1168 indicates to the C program that the setgrent() routine is available
1169 for initializing sequential access to the group database.
1171 d_setgrps (d_setgrps.U):
1172 This variable conditionally defines the HAS_SETGROUPS symbol, which
1173 indicates to the C program that the setgroups() routine is available
1174 to set the list of process groups.
1176 d_sethent (d_sethent.U):
1177 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1180 d_setlinebuf (d_setlnbuf.U):
1181 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1182 indicates to the C program that the setlinebuf() routine is available
1183 to change stderr or stdout from block-buffered or unbuffered to a
1186 d_setlocale (d_setlocale.U):
1187 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1188 available to handle locale-specific ctype implementations.
1190 d_setnent (d_setnent.U):
1191 This variable conditionally defines HAS_SETNETENT if setnetent() is
1194 d_setpent (d_setpent.U):
1195 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1198 d_setpgid (d_setpgid.U):
1199 This variable conditionally defines the HAS_SETPGID symbol if the
1200 setpgid(pid, gpid) function is available to set process group ID.
1202 d_setpgrp2 (d_setpgrp2.U):
1203 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1204 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1205 is available to set the current process group.
1207 d_setpgrp (d_setpgrp.U):
1208 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1209 available to set the current process group.
1211 d_setprior (d_setprior.U):
1212 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1213 is available to set a process's priority.
1215 d_setpwent (d_setpwent.U):
1216 This variable conditionally defines the HAS_SETPWENT symbol, which
1217 indicates to the C program that the setpwent() routine is available
1218 for initializing sequential access to the passwd database.
1220 d_setregid (d_setregid.U):
1221 This variable conditionally defines HAS_SETREGID if setregid() is
1222 available to change the real and effective gid of the current
1225 d_setresgid (d_setregid.U):
1226 This variable conditionally defines HAS_SETRESGID if setresgid() is
1227 available to change the real, effective and saved gid of the current
1230 d_setresuid (d_setreuid.U):
1231 This variable conditionally defines HAS_SETREUID if setresuid() is
1232 available to change the real, effective and saved uid of the current
1235 d_setreuid (d_setreuid.U):
1236 This variable conditionally defines HAS_SETREUID if setreuid() is
1237 available to change the real and effective uid of the current
1240 d_setrgid (d_setrgid.U):
1241 This variable conditionally defines the HAS_SETRGID symbol, which
1242 indicates to the C program that the setrgid() routine is available
1243 to change the real gid of the current program.
1245 d_setruid (d_setruid.U):
1246 This variable conditionally defines the HAS_SETRUID symbol, which
1247 indicates to the C program that the setruid() routine is available
1248 to change the real uid of the current program.
1250 d_setsent (d_setsent.U):
1251 This variable conditionally defines HAS_SETSERVENT if setservent() is
1254 d_setsid (d_setsid.U):
1255 This variable conditionally defines HAS_SETSID if setsid() is
1256 available to set the process group ID.
1258 d_setspent (d_setspent.U):
1259 This variable conditionally defines HAS_SETSPENT if setspent() is
1260 available to initialize the scan of SysV shadow password entries.
1262 d_setvbuf (d_setvbuf.U):
1263 This variable conditionally defines the HAS_SETVBUF symbol, which
1264 indicates to the C program that the setvbuf() routine is available
1265 to change buffering on an open stdio stream.
1268 This variable conditionally defines the USE_SFIO symbol,
1269 and indicates whether sfio is available (and should be used).
1272 This variable conditionally defines the HAS_SHM symbol, which
1273 indicates that the entire shm*(2) library is present.
1275 d_shmat (d_shmat.U):
1276 This variable conditionally defines the HAS_SHMAT symbol, which
1277 indicates to the C program that the shmat() routine is available.
1279 d_shmatprototype (d_shmat.U):
1280 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1281 symbol, which indicates that sys/shm.h has a prototype for
1284 d_shmctl (d_shmctl.U):
1285 This variable conditionally defines the HAS_SHMCTL symbol, which
1286 indicates to the C program that the shmctl() routine is available.
1288 d_shmdt (d_shmdt.U):
1289 This variable conditionally defines the HAS_SHMDT symbol, which
1290 indicates to the C program that the shmdt() routine is available.
1292 d_shmget (d_shmget.U):
1293 This variable conditionally defines the HAS_SHMGET symbol, which
1294 indicates to the C program that the shmget() routine is available.
1296 d_sigaction (d_sigaction.U):
1297 This variable conditionally defines the HAS_SIGACTION symbol, which
1298 indicates that the Vr4 sigaction() routine is available.
1300 d_sigsetjmp (d_sigsetjmp.U):
1301 This variable conditionally defines the HAS_SIGSETJMP symbol,
1302 which indicates that the sigsetjmp() routine is available to
1303 call setjmp() and optionally save the process's signal mask.
1305 d_socket (d_socket.U):
1306 This variable conditionally defines HAS_SOCKET, which indicates
1307 that the BSD socket interface is supported.
1309 d_sockpair (d_socket.U):
1310 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1311 indicates that the BSD socketpair() is supported.
1313 d_sqrtl (d_sqrtl.U):
1314 This variable conditionally defines the HAS_SQRTL symbol, which
1315 indicates to the C program that the sqrtl() routine is available.
1317 d_statblks (d_statblks.U):
1318 This variable conditionally defines USE_STAT_BLOCKS
1319 if this system has a stat structure declaring
1320 st_blksize and st_blocks.
1322 d_statfs_f_flags (d_statfs_f_flags.U):
1323 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1324 symbol, which indicates to struct statfs from has f_flags member.
1325 This kind of struct statfs is coming from sys/mount.h (BSD),
1326 not from sys/statfs.h (SYSV).
1328 d_statfs_s (d_statfs_s.U):
1329 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1330 which indicates that the struct statfs is supported.
1332 d_statvfs (d_statvfs.U):
1333 This variable conditionally defines the HAS_STATVFS symbol, which
1334 indicates to the C program that the statvfs() routine is available.
1336 d_stdio_cnt_lval (d_stdstdio.U):
1337 This variable conditionally defines STDIO_CNT_LVALUE if the
1338 FILE_cnt macro can be used as an lvalue.
1340 d_stdio_ptr_lval (d_stdstdio.U):
1341 This variable conditionally defines STDIO_PTR_LVALUE if the
1342 FILE_ptr macro can be used as an lvalue.
1344 d_stdio_stream_array (stdio_streams.U):
1345 This variable tells whether there is an array holding
1348 d_stdiobase (d_stdstdio.U):
1349 This variable conditionally defines USE_STDIO_BASE if this system
1350 has a FILE structure declaring a usable _base field (or equivalent)
1353 d_stdstdio (d_stdstdio.U):
1354 This variable conditionally defines USE_STDIO_PTR if this system
1355 has a FILE structure declaring usable _ptr and _cnt fields (or
1356 equivalent) in stdio.h.
1358 d_strchr (d_strchr.U):
1359 This variable conditionally defines HAS_STRCHR if strchr() and
1360 strrchr() are available for string searching.
1362 d_strcoll (d_strcoll.U):
1363 This variable conditionally defines HAS_STRCOLL if strcoll() is
1364 available to compare strings using collating information.
1366 d_strctcpy (d_strctcpy.U):
1367 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1368 indicates to the C program that this C compiler knows how to copy
1371 d_strerrm (d_strerror.U):
1372 This variable holds what Strerrr is defined as to translate an error
1373 code condition into an error message string. It could be 'strerror'
1374 or a more complex macro emulating strrror with sys_errlist[], or the
1375 "unknown" string when both strerror and sys_errlist are missing.
1377 d_strerror (d_strerror.U):
1378 This variable conditionally defines HAS_STRERROR if strerror() is
1379 available to translate error numbers to strings.
1381 d_strtod (d_strtod.U):
1382 This variable conditionally defines the HAS_STRTOD symbol, which
1383 indicates to the C program that the strtod() routine is available
1384 to provide better numeric string conversion than atof().
1386 d_strtol (d_strtol.U):
1387 This variable conditionally defines the HAS_STRTOL symbol, which
1388 indicates to the C program that the strtol() routine is available
1389 to provide better numeric string conversion than atoi() and friends.
1391 d_strtoul (d_strtoul.U):
1392 This variable conditionally defines the HAS_STRTOUL symbol, which
1393 indicates to the C program that the strtoul() routine is available
1394 to provide conversion of strings to unsigned long.
1396 d_strtoull (strtoull.U):
1397 This variable conditionally defines the HAS_STRTOULL symbol, which
1398 indicates to the C program that the strtoull() routine is available.
1400 d_strxfrm (d_strxfrm.U):
1401 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1402 available to transform strings.
1404 d_suidsafe (d_dosuid.U):
1405 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1406 if setuid scripts can be secure. This test looks in /dev/fd/.
1408 d_symlink (d_symlink.U):
1409 This variable conditionally defines the HAS_SYMLINK symbol, which
1410 indicates to the C program that the symlink() routine is available
1411 to create symbolic links.
1413 d_syscall (d_syscall.U):
1414 This variable conditionally defines HAS_SYSCALL if syscall() is
1415 available call arbitrary system calls.
1417 d_sysconf (d_sysconf.U):
1418 This variable conditionally defines the HAS_SYSCONF symbol, which
1419 indicates to the C program that the sysconf() routine is available
1420 to determine system related limits and options.
1422 d_sysernlst (d_strerror.U):
1423 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1424 is available to translate error numbers to the symbolic name.
1426 d_syserrlst (d_strerror.U):
1427 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1428 available to translate error numbers to strings.
1430 d_system (d_system.U):
1431 This variable conditionally defines HAS_SYSTEM if system() is
1432 available to issue a shell command.
1434 d_tcgetpgrp (d_tcgtpgrp.U):
1435 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1436 indicates to the C program that the tcgetpgrp() routine is available.
1437 to get foreground process group ID.
1439 d_tcsetpgrp (d_tcstpgrp.U):
1440 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1441 indicates to the C program that the tcsetpgrp() routine is available
1442 to set foreground process group ID.
1444 d_telldir (d_readdir.U):
1445 This variable conditionally defines HAS_TELLDIR if telldir() is
1448 d_telldirproto (d_telldirproto.U):
1449 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1450 which indicates to the C program that the system provides
1451 a prototype for the telldir() function. Otherwise, it is
1452 up to the program to supply one.
1455 This variable conditionally defines the HAS_TIME symbol, which indicates
1456 that the time() routine exists. The time() routine is normaly
1457 provided on UNIX systems.
1459 d_times (d_times.U):
1460 This variable conditionally defines the HAS_TIMES symbol, which indicates
1461 that the times() routine exists. The times() routine is normaly
1462 provided on UNIX systems. You may have to include <sys/times.h>.
1464 d_truncate (d_truncate.U):
1465 This variable conditionally defines HAS_TRUNCATE if truncate() is
1466 available to truncate files.
1468 d_tzname (d_tzname.U):
1469 This variable conditionally defines HAS_TZNAME if tzname[] is
1470 available to access timezone names.
1472 d_umask (d_umask.U):
1473 This variable conditionally defines the HAS_UMASK symbol, which
1474 indicates to the C program that the umask() routine is available.
1475 to set and get the value of the file creation mask.
1477 d_uname (d_gethname.U):
1478 This variable conditionally defines the HAS_UNAME symbol, which
1479 indicates to the C program that the uname() routine may be
1480 used to derive the host name.
1482 d_union_semun (d_union_semun.U):
1483 This variable conditionally defines HAS_UNION_SEMUN if the
1484 union semun is defined by including <sys/sem.h>.
1486 d_ustat (d_ustat.U):
1487 This variable conditionally defines HAS_USTAT if ustat() is
1488 available to query file system statistics by dev_t.
1490 d_vendorbin (vendorbin.U):
1491 This variable conditionally defines PERL_VENDORBIN.
1493 d_vendorlib (vendorlib.U):
1494 This variable conditionally defines PERL_VENDORLIB.
1496 d_vfork (d_vfork.U):
1497 This variable conditionally defines the HAS_VFORK symbol, which
1498 indicates the vfork() routine is available.
1500 d_void_closedir (d_closedir.U):
1501 This variable conditionally defines VOID_CLOSEDIR if closedir()
1502 does not return a value.
1504 d_voidsig (d_voidsig.U):
1505 This variable conditionally defines VOIDSIG if this system
1506 declares "void (*signal(...))()" in signal.h. The old way was to
1507 declare it as "int (*signal(...))()".
1509 d_voidtty (i_sysioctl.U):
1510 This variable conditionally defines USE_IOCNOTTY to indicate that the
1511 ioctl() call with TIOCNOTTY should be used to void tty association.
1512 Otherwise (on USG probably), it is enough to close the standard file
1513 decriptors and do a setpgrp().
1515 d_volatile (d_volatile.U):
1516 This variable conditionally defines the HASVOLATILE symbol, which
1517 indicates to the C program that this C compiler knows about the
1518 volatile declaration.
1520 d_vprintf (d_vprintf.U):
1521 This variable conditionally defines the HAS_VPRINTF symbol, which
1522 indicates to the C program that the vprintf() routine is available
1523 to printf with a pointer to an argument list.
1525 d_wait4 (d_wait4.U):
1526 This variable conditionally defines the HAS_WAIT4 symbol, which
1527 indicates the wait4() routine is available.
1529 d_waitpid (d_waitpid.U):
1530 This variable conditionally defines HAS_WAITPID if waitpid() is
1531 available to wait for child process.
1533 d_wcstombs (d_wcstombs.U):
1534 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1535 indicates to the C program that the wcstombs() routine is available
1536 to convert wide character strings to multibyte strings.
1538 d_wctomb (d_wctomb.U):
1539 This variable conditionally defines the HAS_WCTOMB symbol, which
1540 indicates to the C program that the wctomb() routine is available
1541 to convert a wide character to a multibyte.
1544 This variable conditionally defines the symbol XENIX, which alerts
1545 the C program that it runs under Xenix.
1548 This variable is used internally by Configure to determine the
1549 full pathname (if any) of the date program. After Configure runs,
1550 the value is reset to a plain "date" and is not useful.
1552 db_hashtype (i_db.U):
1553 This variable contains the type of the hash structure element
1554 in the <db.h> header file. In older versions of DB, it was
1555 int, while in newer ones it is u_int32_t.
1557 db_prefixtype (i_db.U):
1558 This variable contains the type of the prefix structure element
1559 in the <db.h> header file. In older versions of DB, it was
1560 int, while in newer ones it is size_t.
1562 defvoidused (voidflags.U):
1563 This variable contains the default value of the VOIDUSED symbol (15).
1565 direntrytype (i_dirent.U):
1566 This symbol is set to 'struct direct' or 'struct dirent' depending on
1567 whether dirent is available or not. You should use this pseudo type to
1568 portably declare your directory entries.
1571 This variable contains the extension that is to be used for the
1572 dynamically loaded modules that perl generaties.
1575 This variable contains the name of the dynamic loading file that
1576 will be used with the package.
1578 doublesize (doublesize.U):
1579 This variable contains the value of the DOUBLESIZE symbol, which
1580 indicates to the C program how many bytes there are in a double.
1582 drand01 (randfunc.U):
1583 Indicates the macro to be used to generate normalized
1584 random numbers. Uses randfunc, often divided by
1585 (double) (((unsigned long) 1 << randbits)) in order to
1586 normalize the result.
1587 In C programs, the macro 'Drand01' is mapped to drand01.
1589 dynamic_ext (Extensions.U):
1590 This variable holds a list of XS extension files we want to
1591 link dynamically into the package. It is used by Makefile.
1593 eagain (nblock_io.U):
1594 This variable bears the symbolic errno code set by read() when no
1595 data is present on the file and non-blocking I/O was enabled (otherwise,
1596 read() blocks naturally).
1599 This variable conditionally defines EBCDIC if this
1600 system uses EBCDIC encoding. Among other things, this
1601 means that the character ranges are not contiguous.
1605 This variable is used internally by Configure to determine the
1606 full pathname (if any) of the echo program. After Configure runs,
1607 the value is reset to a plain "echo" and is not useful.
1610 This variable is used internally by Configure to determine the
1611 full pathname (if any) of the egrep program. After Configure runs,
1612 the value is reset to a plain "egrep" and is not useful.
1615 This variable is defined but not used by Configure.
1616 The value is a plain '' and is not useful.
1619 When running under Eunice this variable contains a command which will
1620 convert a shell script to the proper form of text file for it to be
1621 executable by the shell. On other systems it is a no-op.
1624 This is an old synonym for _exe.
1627 This variable is used internally by Configure to determine the
1628 full pathname (if any) of the expr program. After Configure runs,
1629 the value is reset to a plain "expr" and is not useful.
1631 extensions (Extensions.U):
1632 This variable holds a list of all extension files (both XS and
1633 non-xs linked into the package. It is propagated to Config.pm
1634 and is typically used to test whether a particular extesion
1637 fflushNULL (fflushall.U):
1638 This symbol, if defined, tells that fflush(NULL) does flush
1639 all pending stdio output.
1641 fflushall (fflushall.U):
1642 This symbol, if defined, tells that to flush
1643 all pending stdio output one must loop through all
1644 the stdio file handles stored in an array and fflush them.
1645 Note that if fflushNULL is defined, fflushall will not
1646 even be probed for and will be left undefined.
1649 This variable is defined but not used by Configure.
1650 The value is a plain '' and is not useful.
1652 firstmakefile (Unix.U):
1653 This variable defines the first file searched by make. On unix,
1654 it is makefile (then Makefile). On case-insensitive systems,
1655 it might be something else. This is only used to deal with
1656 convoluted make depend tricks.
1659 This variable is defined but not used by Configure.
1660 The value is a plain '' and is not useful.
1662 fpossize (fpossize.U):
1663 This variable contains the size of a fpostype in bytes.
1665 fpostype (fpostype.U):
1666 This variable defines Fpos_t to be something like fpos_t, long,
1667 uint, or whatever type is used to declare file positions in libc.
1669 freetype (mallocsrc.U):
1670 This variable contains the return type of free(). It is usually
1671 void, but occasionally int.
1674 This variable contains the full pathname to 'ar', whether or
1675 not the user has specified 'portability'. This is only used
1679 This variable contains the full pathname to 'csh', whether or
1680 not the user has specified 'portability'. This is only used
1681 in the compiled C program, and we assume that all systems which
1682 can share this executable will have the same full pathname to
1685 full_sed (Loc_sed.U):
1686 This variable contains the full pathname to 'sed', whether or
1687 not the user has specified 'portability'. This is only used
1688 in the compiled C program, and we assume that all systems which
1689 can share this executable will have the same full pathname to
1693 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1694 indicate whether the compiler is version 1 or 2. This is used in
1695 setting some of the default cflags. It is set to '' if not gcc.
1698 This variable contains the format string used for printing a Gid_t.
1700 gidsign (gidsign.U):
1701 This variable contains the signedness of a gidtype.
1702 1 for unsigned, -1 for signed.
1704 gidsize (gidsize.U):
1705 This variable contains the size of a gidtype in bytes.
1707 gidtype (gidtype.U):
1708 This variable defines Gid_t to be something like gid_t, int,
1709 ushort, or whatever type is used to declare the return type
1710 of getgid(). Typically, it is the type of group ids in the kernel.
1713 This variable holds the general path (space-separated) used to
1714 find libraries. It may contain directories that do not exist on
1715 this platform, libpth is the cleaned-up version.
1718 This variable is used internally by Configure to determine the
1719 full pathname (if any) of the grep program. After Configure runs,
1720 the value is reset to a plain "grep" and is not useful.
1723 This variable contains a command that produces the text of the
1724 /etc/group file. This is normally "cat /etc/group", but can be
1725 "ypcat group" when NIS is used.
1727 groupstype (groupstype.U):
1728 This variable defines Groups_t to be something like gid_t, int,
1729 ushort, or whatever type is used for the second argument to
1730 getgroups() and setgroups(). Usually, this is the same as
1731 gidtype (gid_t), but sometimes it isn't.
1734 This variable is used internally by Configure to determine the
1735 full pathname (if any) of the gzip program. After Configure runs,
1736 the value is reset to a plain "gzip" and is not useful.
1738 h_fcntl (h_fcntl.U):
1739 This is variable gets set in various places to tell i_fcntl that
1740 <fcntl.h> should be included.
1742 h_sysfile (h_sysfile.U):
1743 This is variable gets set in various places to tell i_sys_file that
1744 <sys/file.h> should be included.
1747 Gives the type of hints used for previous answers. May be one of
1748 "default", "recommended" or "previous".
1751 This variable contains a command that produces the text of the
1752 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1753 "ypcat hosts" when NIS is used.
1756 This variable contains a flag which will tell the C compiler and loader
1757 to produce a program running with a huge memory model. If the
1758 huge model is not supported, contains the flag to produce large
1759 model programs. It is up to the Makefile to use this.
1762 This variable is the size of an I16 in bytes.
1765 This variable contains the C type used for Perl's I16.
1768 This variable is the size of an I32 in bytes.
1771 This variable contains the C type used for Perl's I32.
1774 This variable is the size of an I64 in bytes.
1777 This variable contains the C type used for Perl's I64.
1780 This variable is the size of an I8 in bytes.
1783 This variable contains the C type used for Perl's I8.
1785 i_arpainet (i_arpainet.U):
1786 This variable conditionally defines the I_ARPA_INET symbol,
1787 and indicates whether a C program should include <arpa/inet.h>.
1789 i_bsdioctl (i_sysioctl.U):
1790 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1791 indicates to the C program that <sys/bsdioctl.h> exists and should
1795 This variable conditionally defines the I_DB symbol, and indicates
1796 whether a C program may include Berkeley's DB include file <db.h>.
1799 This variable conditionally defines the I_DBM symbol, which
1800 indicates to the C program that <dbm.h> exists and should
1803 i_dirent (i_dirent.U):
1804 This variable conditionally defines I_DIRENT, which indicates
1805 to the C program that it should include <dirent.h>.
1808 This variable conditionally defines the I_DLD symbol, which
1809 indicates to the C program that <dld.h> (GNU dynamic loading)
1810 exists and should be included.
1812 i_dlfcn (i_dlfcn.U):
1813 This variable conditionally defines the I_DLFCN symbol, which
1814 indicates to the C program that <dlfcn.h> exists and should
1817 i_fcntl (i_fcntl.U):
1818 This variable controls the value of I_FCNTL (which tells
1819 the C program to include <fcntl.h>).
1821 i_float (i_float.U):
1822 This variable conditionally defines the I_FLOAT symbol, and indicates
1823 whether a C program may include <float.h> to get symbols like DBL_MAX
1824 or DBL_MIN, i.e. machine dependent floating point values.
1827 This variable conditionally defines the I_GDBM symbol, which
1828 indicates to the C program that <gdbm.h> exists and should
1832 This variable conditionally defines the I_GRP symbol, and indicates
1833 whether a C program should include <grp.h>.
1835 i_inttypes (i_inttypes.U):
1836 This variable conditionally defines the I_INTTYPES symbol,
1837 and indicates whether a C program should include <inttypes.h>.
1839 i_limits (i_limits.U):
1840 This variable conditionally defines the I_LIMITS symbol, and indicates
1841 whether a C program may include <limits.h> to get symbols like WORD_BIT
1844 i_locale (i_locale.U):
1845 This variable conditionally defines the I_LOCALE symbol,
1846 and indicates whether a C program should include <locale.h>.
1848 i_machcthr (i_machcthr.U):
1849 This variable conditionally defines the I_MACH_CTHREADS symbol,
1850 and indicates whether a C program should include <mach/cthreads.h>.
1852 i_malloc (i_malloc.U):
1853 This variable conditionally defines the I_MALLOC symbol, and indicates
1854 whether a C program should include <malloc.h>.
1857 This variable conditionally defines the I_MATH symbol, and indicates
1858 whether a C program may include <math.h>.
1860 i_memory (i_memory.U):
1861 This variable conditionally defines the I_MEMORY symbol, and indicates
1862 whether a C program should include <memory.h>.
1864 i_mntent (i_mntent.U):
1865 This variable conditionally defines the I_MNTENT symbol, and indicates
1866 whether a C program should include <mntent.h>.
1869 This variable conditionally defines the I_NDBM symbol, which
1870 indicates to the C program that <ndbm.h> exists and should
1873 i_netdb (i_netdb.U):
1874 This variable conditionally defines the I_NETDB symbol, and indicates
1875 whether a C program should include <netdb.h>.
1877 i_neterrno (i_neterrno.U):
1878 This variable conditionally defines the I_NET_ERRNO symbol, which
1879 indicates to the C program that <net/errno.h> exists and should
1882 i_netinettcp (i_netinettcp.U):
1883 This variable conditionally defines the I_NETINET_TCP symbol,
1884 and indicates whether a C program should include <netinet/tcp.h>.
1887 This variable conditionally defines I_NETINET_IN, which indicates
1888 to the C program that it should include <netinet/in.h>. Otherwise,
1889 you may try <sys/in.h>.
1892 This variable conditionally defines the I_POLL symbol, and indicates
1893 whether a C program should include <poll.h>.
1895 i_pthread (i_pthread.U):
1896 This variable conditionally defines the I_PTHREAD symbol,
1897 and indicates whether a C program should include <pthread.h>.
1900 This variable conditionally defines I_PWD, which indicates
1901 to the C program that it should include <pwd.h>.
1903 i_rpcsvcdbm (i_dbm.U):
1904 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1905 indicates to the C program that <rpcsvc/dbm.h> exists and should
1906 be included. Some System V systems might need this instead of <dbm.h>.
1909 This variable conditionally defines the I_SFIO symbol,
1910 and indicates whether a C program should include <sfio.h>.
1912 i_sgtty (i_termio.U):
1913 This variable conditionally defines the I_SGTTY symbol, which
1914 indicates to the C program that it should include <sgtty.h> rather
1917 i_shadow (i_shadow.U):
1918 This variable conditionally defines the I_SHADOW symbol, and indicates
1919 whether a C program should include <shadow.h>.
1921 i_socks (i_socks.U):
1922 This variable conditionally defines the I_SOCKS symbol, and indicates
1923 whether a C program should include <socks.h>.
1925 i_stdarg (i_varhdr.U):
1926 This variable conditionally defines the I_STDARG symbol, which
1927 indicates to the C program that <stdarg.h> exists and should
1930 i_stddef (i_stddef.U):
1931 This variable conditionally defines the I_STDDEF symbol, which
1932 indicates to the C program that <stddef.h> exists and should
1935 i_stdlib (i_stdlib.U):
1936 This variable conditionally defines the I_STDLIB symbol, which
1937 indicates to the C program that <stdlib.h> exists and should
1940 i_string (i_string.U):
1941 This variable conditionally defines the I_STRING symbol, which
1942 indicates that <string.h> should be included rather than <strings.h>.
1944 i_sysaccess (i_sysaccess.U):
1945 This variable conditionally defines the I_SYS_ACCESS symbol,
1946 and indicates whether a C program should include <sys/access.h>.
1948 i_sysdir (i_sysdir.U):
1949 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1950 whether a C program should include <sys/dir.h>.
1952 i_sysfile (i_sysfile.U):
1953 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1954 whether a C program should include <sys/file.h> to get R_OK and friends.
1956 i_sysfilio (i_sysioctl.U):
1957 This variable conditionally defines the I_SYS_FILIO symbol, which
1958 indicates to the C program that <sys/filio.h> exists and should
1959 be included in preference to <sys/ioctl.h>.
1962 This variable conditionally defines I_SYS_IN, which indicates
1963 to the C program that it should include <sys/in.h> instead of
1966 i_sysioctl (i_sysioctl.U):
1967 This variable conditionally defines the I_SYS_IOCTL symbol, which
1968 indicates to the C program that <sys/ioctl.h> exists and should
1971 i_sysmount (i_sysmount.U):
1972 This variable conditionally defines the I_SYSMOUNT symbol,
1973 and indicates whether a C program should include <sys/mount.h>.
1975 i_sysndir (i_sysndir.U):
1976 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1977 whether a C program should include <sys/ndir.h>.
1979 i_sysparam (i_sysparam.U):
1980 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1981 whether a C program should include <sys/param.h>.
1983 i_sysresrc (i_sysresrc.U):
1984 This variable conditionally defines the I_SYS_RESOURCE symbol,
1985 and indicates whether a C program should include <sys/resource.h>.
1987 i_syssecrt (i_syssecrt.U):
1988 This variable conditionally defines the I_SYS_SECURITY symbol,
1989 and indicates whether a C program should include <sys/security.h>.
1991 i_sysselct (i_sysselct.U):
1992 This variable conditionally defines I_SYS_SELECT, which indicates
1993 to the C program that it should include <sys/select.h> in order to
1994 get the definition of struct timeval.
1996 i_syssockio (i_sysioctl.U):
1997 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1998 C program that socket ioctl codes may be found in <sys/sockio.h>
1999 instead of <sys/ioctl.h>.
2001 i_sysstat (i_sysstat.U):
2002 This variable conditionally defines the I_SYS_STAT symbol,
2003 and indicates whether a C program should include <sys/stat.h>.
2005 i_sysstatfs (i_sysstatfs.U):
2006 This variable conditionally defines the I_SYSSTATFS symbol,
2007 and indicates whether a C program should include <sys/statfs.h>.
2009 i_sysstatvfs (i_sysstatvfs.U):
2010 This variable conditionally defines the I_SYSSTATVFS symbol,
2011 and indicates whether a C program should include <sys/statvfs.h>.
2013 i_systime (i_time.U):
2014 This variable conditionally defines I_SYS_TIME, which indicates
2015 to the C program that it should include <sys/time.h>.
2017 i_systimek (i_time.U):
2018 This variable conditionally defines I_SYS_TIME_KERNEL, which
2019 indicates to the C program that it should include <sys/time.h>
2020 with KERNEL defined.
2022 i_systimes (i_systimes.U):
2023 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2024 whether a C program should include <sys/times.h>.
2026 i_systypes (i_systypes.U):
2027 This variable conditionally defines the I_SYS_TYPES symbol,
2028 and indicates whether a C program should include <sys/types.h>.
2030 i_sysuio (i_sysuio.U):
2031 This variable conditionally defines the I_SYSUIO symbol, and indicates
2032 whether a C program should include <sys/uio.h>.
2034 i_sysun (i_sysun.U):
2035 This variable conditionally defines I_SYS_UN, which indicates
2036 to the C program that it should include <sys/un.h> to get UNIX
2037 domain socket definitions.
2039 i_sysvfs (i_sysvfs.U):
2040 This variable conditionally defines the I_SYSVFS symbol,
2041 and indicates whether a C program should include <sys/vfs.h>.
2043 i_syswait (i_syswait.U):
2044 This variable conditionally defines I_SYS_WAIT, which indicates
2045 to the C program that it should include <sys/wait.h>.
2047 i_termio (i_termio.U):
2048 This variable conditionally defines the I_TERMIO symbol, which
2049 indicates to the C program that it should include <termio.h> rather
2052 i_termios (i_termio.U):
2053 This variable conditionally defines the I_TERMIOS symbol, which
2054 indicates to the C program that the POSIX <termios.h> file is
2058 This variable conditionally defines I_TIME, which indicates
2059 to the C program that it should include <time.h>.
2061 i_unistd (i_unistd.U):
2062 This variable conditionally defines the I_UNISTD symbol, and indicates
2063 whether a C program should include <unistd.h>.
2065 i_ustat (i_ustat.U):
2066 This variable conditionally defines the I_USTAT symbol, and indicates
2067 whether a C program should include <ustat.h>.
2069 i_utime (i_utime.U):
2070 This variable conditionally defines the I_UTIME symbol, and indicates
2071 whether a C program should include <utime.h>.
2073 i_values (i_values.U):
2074 This variable conditionally defines the I_VALUES symbol, and indicates
2075 whether a C program may include <values.h> to get symbols like MAXLONG
2078 i_varargs (i_varhdr.U):
2079 This variable conditionally defines I_VARARGS, which indicates
2080 to the C program that it should include <varargs.h>.
2082 i_varhdr (i_varhdr.U):
2083 Contains the name of the header to be included to get va_dcl definition.
2084 Typically one of varargs.h or stdarg.h.
2086 i_vfork (i_vfork.U):
2087 This variable conditionally defines the I_VFORK symbol, and indicates
2088 whether a C program should include vfork.h.
2090 ignore_versioned_solibs (libs.U):
2091 This variable should be non-empty if non-versioned shared
2092 libraries (libfoo.so.x.y) are to be ignored (because they
2093 cannot be linked against).
2096 This variable must preceed the normal include path to get hte
2097 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2098 Value can be "" or "/bsd43" on mips.
2101 This variable is defined but not used by Configure.
2102 The value is a plain '' and is not useful.
2104 installarchlib (archlib.U):
2105 This variable is really the same as archlibexp but may differ on
2106 those systems using AFS. For extra portability, only this variable
2107 should be used in makefiles.
2110 This variable is the same as binexp unless AFS is running in which case
2111 the user is explicitely prompted for it. This variable should always
2112 be used in your makefiles for maximum portability.
2114 installman1dir (man1dir.U):
2115 This variable is really the same as man1direxp, unless you are using
2116 AFS in which case it points to the read/write location whereas
2117 man1direxp only points to the read-only access location. For extra
2118 portability, you should only use this variable within your makefiles.
2120 installman3dir (man3dir.U):
2121 This variable is really the same as man3direxp, unless you are using
2122 AFS in which case it points to the read/write location whereas
2123 man3direxp only points to the read-only access location. For extra
2124 portability, you should only use this variable within your makefiles.
2126 installprefix (installprefix.U):
2127 This variable holds the name of the directory below which
2128 "make install" will install the package. For most users, this
2129 is the same as prefix. However, it is useful for
2130 installing the software into a different (usually temporary)
2131 location after which it can be bundled up and moved somehow
2132 to the final location specified by prefix.
2134 installprefixexp (installprefix.U):
2135 This variable holds the full absolute path of installprefix
2136 with all ~-expansion done.
2138 installprivlib (privlib.U):
2139 This variable is really the same as privlibexp but may differ on
2140 those systems using AFS. For extra portability, only this variable
2141 should be used in makefiles.
2143 installscript (scriptdir.U):
2144 This variable is usually the same as scriptdirexp, unless you are on
2145 a system running AFS, in which case they may differ slightly. You
2146 should always use this variable within your makefiles for portability.
2148 installsitearch (sitearch.U):
2149 This variable is really the same as sitearchexp but may differ on
2150 those systems using AFS. For extra portability, only this variable
2151 should be used in makefiles.
2153 installsitebin (sitebin.U):
2154 This variable is usually the same as sitebinexp, unless you are on
2155 a system running AFS, in which case they may differ slightly. You
2156 should always use this variable within your makefiles for portability.
2158 installsitelib (sitelib.U):
2159 This variable is really the same as sitelibexp but may differ on
2160 those systems using AFS. For extra portability, only this variable
2161 should be used in makefiles.
2163 installstyle (installstyle.U):
2164 This variable describes the "style" of the perl installation.
2165 This is intended to be useful for tools that need to
2166 manipulate entire perl distributions. Perl itself doesn't use
2167 this to find its libraries -- the library directories are
2168 stored directly in Config.pm. Currently, there are only two
2169 styles: "lib" and "lib/perl5". The default library locations
2170 (e.g. privlib, sitelib) are either $prefix/lib or
2171 $prefix/lib/perl5. The former is useful if $prefix is a
2172 directory dedicated to perl (e.g. /opt/perl), while the latter
2173 is useful if $prefix is shared by many packages, e.g. if
2175 This may later be extended to include other information, so
2176 be careful with pattern-matching on the results.
2177 For compatibility with perl5.005 and earlier, the default
2178 setting is based on whether or not $prefix contains the string
2181 installusrbinperl (instubperl.U):
2182 This variable tells whether Perl should be installed also as
2183 /usr/bin/perl in addition to
2186 installvendorbin (vendorbin.U):
2187 This variable is really the same as vendorbinexp but may differ on
2188 those systems using AFS. For extra portability, only this variable
2189 should be used in makefiles.
2191 installvendorlib (vendorlib.U):
2192 This variable is really the same as vendorlibexp but may differ on
2193 those systems using AFS. For extra portability, only this variable
2194 should be used in makefiles.
2196 intsize (intsize.U):
2197 This variable contains the value of the INTSIZE symbol, which
2198 indicates to the C program how many bytes there are in an int.
2200 ivdformat (perlxvf.U):
2201 This variable contains the format string used for printing
2202 a Perl IV as a signed decimal integer.
2205 This variable is the size of an IV in bytes.
2208 This variable contains the C type used for Perl's IV.
2210 known_extensions (Extensions.U):
2211 This variable holds a list of all XS extensions included in
2215 This variable is defined but not used by Configure.
2216 The value is a plain '' and is not useful.
2219 This variable contains a flag which will tell the C compiler and loader
2220 to produce a program running with a large memory model. It is up to
2221 the Makefile to use this.
2224 This variable indicates the program to be used to link
2225 libraries for dynamic loading. On some systems, it is 'ld'.
2226 On ELF systems, it should be $cc. Mostly, we'll try to respect
2227 the hint file setting.
2229 lddlflags (dlsrc.U):
2230 This variable contains any special flags that might need to be
2231 passed to $ld to create a shared library suitable for dynamic
2232 loading. It is up to the makefile to use it. For hpux, it
2233 should be '-b'. For sunos 4.1, it is empty.
2235 ldflags (ccflags.U):
2236 This variable contains any additional C loader flags desired by
2237 the user. It is up to the Makefile to use this.
2239 ldlibpthname (libperl.U):
2240 This variable holds the name of the shared library
2241 search path, often LD_LIBRARY_PATH. To get an empty
2242 string, the hints file must set this to 'none'.
2245 This variable is used internally by Configure to determine the
2246 full pathname (if any) of the less program. After Configure runs,
2247 the value is reset to a plain "less" and is not useful.
2250 This is an old synonym for _a.
2253 This variable contains the location of the C library.
2255 libperl (libperl.U):
2256 The perl executable is obtained by linking perlmain.c with
2257 libperl, any static extensions (usually just DynaLoader),
2258 and any other libraries needed on this system. libperl
2259 is usually libperl.a, but can also be libperl.so.xxx if
2260 the user wishes to build a perl executable with a shared
2264 This variable holds the general path (space-separated) used to find
2265 libraries. It is intended to be used by other units.
2268 This variable holds the additional libraries we want to use.
2269 It is up to the Makefile to deal with it.
2271 libswanted (Myinit.U):
2272 This variable holds a list of all the libraries we want to
2273 search. The order is chosen to pick up the c library
2274 ahead of ucb or bsd libraries for SVR4.
2277 This variable is defined but not used by Configure.
2278 The value is a plain '' and is not useful.
2281 This variable is defined but not used by Configure.
2282 The value is a plain '' and is not useful.
2284 lkflags (ccflags.U):
2285 This variable contains any additional C partial linker flags desired by
2286 the user. It is up to the Makefile to use this.
2289 This variable is used internally by Configure to determine the
2290 full pathname (if any) of the ln program. After Configure runs,
2291 the value is reset to a plain "ln" and is not useful.
2294 This variable holds the name of the command to make
2295 symbolic links (if they are supported). It can be used
2296 in the Makefile. It is either 'ln -s' or 'ln'
2298 locincpth (ccflags.U):
2299 This variable contains a list of additional directories to be
2300 searched by the compiler. The appropriate '-I' directives will
2301 be added to ccflags. This is intended to simplify setting
2302 local directories from the Configure command line.
2303 It's not much, but it parallels the loclibpth stuff in libpth.U.
2305 loclibpth (libpth.U):
2306 This variable holds the paths (space-separated) used to find local
2307 libraries. It is prepended to libpth, and is intended to be easily
2308 set from the command line.
2310 longdblsize (d_longdbl.U):
2311 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2312 indicates to the C program how many bytes there are in a long double,
2313 if this system supports long doubles.
2315 longlongsize (d_longlong.U):
2316 This variable contains the value of the LONGLONGSIZE symbol, which
2317 indicates to the C program how many bytes there are in a long long,
2318 if this system supports long long.
2320 longsize (intsize.U):
2321 This variable contains the value of the LONGSIZE symbol, which
2322 indicates to the C program how many bytes there are in a long.
2325 This variable is defined but not used by Configure.
2326 The value is a plain '' and is not useful.
2329 This variable is defined but not used by Configure.
2330 The value is a plain '' and is not useful.
2333 This variable is used internally by Configure to determine the
2334 full pathname (if any) of the ls program. After Configure runs,
2335 the value is reset to a plain "ls" and is not useful.
2337 lseeksize (lseektype.U):
2338 This variable defines lseektype to be something like off_t, long,
2339 or whatever type is used to declare lseek offset's type in the
2340 kernel (which also appears to be lseek's return type).
2342 lseektype (lseektype.U):
2343 This variable defines lseektype to be something like off_t, long,
2344 or whatever type is used to declare lseek offset's type in the
2345 kernel (which also appears to be lseek's return type).
2348 This variable is defined but not used by Configure.
2349 The value is a plain '' and is not useful.
2352 This variable is defined but not used by Configure.
2353 The value is a plain '' and is not useful.
2356 This variable is used internally by Configure to determine the
2357 full pathname (if any) of the make program. After Configure runs,
2358 the value is reset to a plain "make" and is not useful.
2360 make_set_make (make.U):
2361 Some versions of 'make' set the variable MAKE. Others do not.
2362 This variable contains the string to be included in Makefile.SH
2363 so that MAKE is set if needed, and not if not needed.
2364 Possible values are:
2365 make_set_make='#' # If your make program handles this for you,
2366 make_set_make="MAKE=$make" # if it doesn't.
2367 I used a comment character so that we can distinguish a
2368 'set' value (from a previous config.sh or Configure '-D' option)
2369 from an uncomputed value.
2371 mallocobj (mallocsrc.U):
2372 This variable contains the name of the malloc.o that this package
2373 generates, if that malloc.o is preferred over the system malloc.
2374 Otherwise the value is null. This variable is intended for generating
2375 Makefiles. See mallocsrc.
2377 mallocsrc (mallocsrc.U):
2378 This variable contains the name of the malloc.c that comes with
2379 the package, if that malloc.c is preferred over the system malloc.
2380 Otherwise the value is null. This variable is intended for generating
2383 malloctype (mallocsrc.U):
2384 This variable contains the kind of ptr returned by malloc and realloc.
2386 man1dir (man1dir.U):
2387 This variable contains the name of the directory in which manual
2388 source pages are to be put. It is the responsibility of the
2389 Makefile.SH to get the value of this into the proper command.
2390 You must be prepared to do the ~name expansion yourself.
2392 man1direxp (man1dir.U):
2393 This variable is the same as the man1dir variable, but is filename
2394 expanded at configuration time, for convenient use in makefiles.
2396 man1ext (man1dir.U):
2397 This variable contains the extension that the manual page should
2398 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2401 man3dir (man3dir.U):
2402 This variable contains the name of the directory in which manual
2403 source pages are to be put. It is the responsibility of the
2404 Makefile.SH to get the value of this into the proper command.
2405 You must be prepared to do the ~name expansion yourself.
2407 man3direxp (man3dir.U):
2408 This variable is the same as the man3dir variable, but is filename
2409 expanded at configuration time, for convenient use in makefiles.
2411 man3ext (man3dir.U):
2412 This variable contains the extension that the manual page should
2413 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2417 This variable contains a flag which will tell the C compiler and loader
2418 to produce a program running with a medium memory model. If the
2419 medium model is not supported, contains the flag to produce large
2420 model programs. It is up to the Makefile to use this.
2422 mips_type (usrinc.U):
2423 This variable holds the environment type for the mips system.
2424 Possible values are "BSD 4.3" and "System V".
2427 This variable is used internally by Configure to determine the
2428 full pathname (if any) of the mkdir program. After Configure runs,
2429 the value is reset to a plain "mkdir" and is not useful.
2432 This variable contains the list of memory models supported by this
2433 system. Possible component values are none, split, unsplit, small,
2434 medium, large, and huge. The component values are space separated.
2436 modetype (modetype.U):
2437 This variable defines modetype to be something like mode_t,
2438 int, unsigned short, or whatever type is used to declare file
2439 modes for system calls.
2442 This variable is used internally by Configure to determine the
2443 full pathname (if any) of the more program. After Configure runs,
2444 the value is reset to a plain "more" and is not useful.
2446 multiarch (multiarch.U):
2447 This variable conditionally defines the MULTIARCH symbol
2448 which signifies the presence of multiplatform files.
2449 This is normally set by hints files.
2452 This variable is defined but not used by Configure.
2453 The value is a plain '' and is not useful.
2455 myarchname (archname.U):
2456 This variable holds the architecture name computed by Configure in
2457 a previous run. It is not intended to be perused by any user and
2458 should never be set in a hint file.
2460 mydomain (myhostname.U):
2461 This variable contains the eventual value of the MYDOMAIN symbol,
2462 which is the domain of the host the program is going to run on.
2463 The domain must be appended to myhostname to form a complete host name.
2464 The dot comes with mydomain, and need not be supplied by the program.
2466 myhostname (myhostname.U):
2467 This variable contains the eventual value of the MYHOSTNAME symbol,
2468 which is the name of the host the program is going to run on.
2469 The domain is not kept with hostname, but must be gotten from mydomain.
2470 The dot comes with mydomain, and need not be supplied by the program.
2472 myuname (Oldconfig.U):
2473 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2474 pseudo variables assignments in the output are stripped, thank you. The
2475 whole thing is then lower-cased.
2478 This variable contains the '-n' flag if that is what causes the echo
2479 command to suppress newline. Otherwise it is null. Correct usage is
2480 $echo $n "prompt for a question: $c".
2482 netdb_hlen_type (netdbtype.U):
2483 This variable holds the type used for the 2nd argument to
2484 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2485 This is only useful if you have gethostbyaddr(), naturally.
2487 netdb_host_type (netdbtype.U):
2488 This variable holds the type used for the 1st argument to
2489 gethostbyaddr(). Usually, this is char * or void *, possibly
2490 with or without a const prefix.
2491 This is only useful if you have gethostbyaddr(), naturally.
2493 netdb_name_type (netdbtype.U):
2494 This variable holds the type used for the argument to
2495 gethostbyname(). Usually, this is char * or const char *.
2496 This is only useful if you have gethostbyname(), naturally.
2498 netdb_net_type (netdbtype.U):
2499 This variable holds the type used for the 1st argument to
2500 getnetbyaddr(). Usually, this is int or long.
2501 This is only useful if you have getnetbyaddr(), naturally.
2504 This variable is used internally by Configure to determine the
2505 full pathname (if any) of the nm program. After Configure runs,
2506 the value is reset to a plain "nm" and is not useful.
2509 This variable holds the options that may be necessary for nm.
2511 nm_so_opt (usenm.U):
2512 This variable holds the options that may be necessary for nm
2513 to work on a shared library but that can not be used on an
2514 archive library. Currently, this is only used by Linux, where
2515 nm --dynamic is *required* to get symbols from an ELF library which
2516 has been stripped, but nm --dynamic is *fatal* on an archive library.
2517 Maybe Linux should just always set usenm=false.
2519 nonxs_ext (Extensions.U):
2520 This variable holds a list of all non-xs extensions included
2521 in the package. All of them will be built.
2524 This variable is used internally by Configure to determine the
2525 full pathname (if any) of the nroff program. After Configure runs,
2526 the value is reset to a plain "nroff" and is not useful.
2529 This variable is the size of an NV in bytes.
2532 This variable contains the C type used for Perl's NV.
2534 o_nonblock (nblock_io.U):
2535 This variable bears the symbol value to be used during open() or fcntl()
2536 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2537 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2538 but that is only supported by some devices.
2541 This is an old synonym for _o.
2543 old_pthread_create_joinable (d_pthrattrj.U):
2544 This variable defines the constant to use for creating joinable
2545 (aka undetached) pthreads. Unused if pthread.h defines
2546 PTHREAD_CREATE_JOINABLE. If used, possible values are
2547 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2549 optimize (ccflags.U):
2550 This variable contains any optimizer/debugger flag that should be used.
2551 It is up to the Makefile to use it.
2553 orderlib (orderlib.U):
2554 This variable is "true" if the components of libraries must be ordered
2555 (with `lorder $* | tsort`) before placing them in an archive. Set to
2556 "false" if ranlib or ar can generate random libraries.
2558 osname (Oldconfig.U):
2559 This variable contains the operating system name (e.g. sunos,
2560 solaris, hpux, etc.). It can be useful later on for setting
2561 defaults. Any spaces are replaced with underscores. It is set
2562 to a null string if we can't figure it out.
2564 osvers (Oldconfig.U):
2565 This variable contains the operating system version (e.g.
2566 4.1.3, 5.2, etc.). It is primarily used for helping select
2567 an appropriate hints file, but might be useful elsewhere for
2568 setting defaults. It is set to '' if we can't figure it out.
2569 We try to be flexible about how much of the version number
2570 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2571 same for this package, hints files might just be os_4.0 or
2572 os_4.1, etc., not keeping separate files for each little release.
2574 package (package.U):
2575 This variable contains the name of the package being constructed.
2576 It is primarily intended for the use of later Configure units.
2579 This variable contains the name of the preferred pager on the system.
2580 Usual values are (the full pathnames of) more, less, pg, or cat.
2583 This variable contains a command that produces the text of the
2584 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2585 "ypcat passwd" when NIS is used.
2587 patchlevel (patchlevel.U):
2588 The patchlevel level of this package.
2589 The value of patchlevel comes from the patchlevel.h file.
2592 This is an old synonym for p_ in Head.U, the character
2593 used to separate elements in the command shell search PATH.
2596 This variable is defined but not used by Configure.
2597 The value is a plain '' and is not useful.
2599 perladmin (perladmin.U):
2600 Electronic mail address of the perl5 administrator.
2602 perlpath (perlpath.U):
2603 This variable contains the eventual value of the PERLPATH symbol,
2604 which contains the name of the perl interpreter to be used in
2605 shell scripts and in the "eval 'exec'" idiom.
2608 This variable is used internally by Configure to determine the
2609 full pathname (if any) of the pg program. After Configure runs,
2610 the value is reset to a plain "pg" and is not useful.
2612 phostname (myhostname.U):
2613 This variable contains the eventual value of the PHOSTNAME symbol,
2614 which is a command that can be fed to popen() to get the host name.
2615 The program should probably not presume that the domain is or isn't
2618 pidtype (pidtype.U):
2619 This variable defines PIDTYPE to be something like pid_t, int,
2620 ushort, or whatever type is used to declare process ids in the kernel.
2623 Holds the private path used by Configure to find out the libraries.
2624 Its value is prepend to libpth. This variable takes care of special
2625 machines, like the mips. Usually, it should be empty.
2627 pm_apiversion (xs_apiversion.U):
2628 This variable contains the version of the oldest perl
2629 compatible with the present perl. (That is, pure perl modules
2630 written for $pm_apiversion will still work for the current
2631 version). perl.c:incpush() and lib/lib.pm will automatically
2632 search in $sitelib for older directories across major versions
2633 back to pm_apiversion. This is only useful if you have a perl
2634 library directory tree structured like the default one. The
2635 versioned site_perl library was introduced in 5.005, so that's
2636 the default setting for this variable. It's hard to imagine
2637 it changing before Perl6. It is included here for symmetry
2638 with xs_apiveprsion -- the searching algorithms will
2639 (presumably) be similar.
2640 See the INSTALL file for how this works.
2643 This variable is defined but not used by Configure.
2644 The value is a plain '' and is not useful.
2647 This variable is defined but not used by Configure.
2648 The value is a plain '' and is not useful.
2651 This variable holds the name of the directory below which the
2652 user will install the package. Usually, this is /usr/local, and
2653 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2654 man pages in /usr/local/man, etc. It is only used to set defaults
2655 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2657 prefixexp (prefix.U):
2658 This variable holds the full absolute path of the directory below
2659 which the user will install the package. Derived from prefix.
2661 privlib (privlib.U):
2662 This variable contains the eventual value of the PRIVLIB symbol,
2663 which is the name of the private library for this package. It may
2664 have a ~ on the front. It is up to the makefile to eventually create
2665 this directory while performing installation (with ~ substitution).
2667 privlibexp (privlib.U):
2668 This variable is the ~name expanded version of privlib, so that you
2669 may use it directly in Makefiles or shell scripts.
2671 prototype (prototype.U):
2672 This variable holds the eventual value of CAN_PROTOTYPE, which
2673 indicates the C compiler can handle funciton prototypes.
2675 ptrsize (ptrsize.U):
2676 This variable contains the value of the PTRSIZE symbol, which
2677 indicates to the C program how many bytes there are in a pointer.
2679 quadkind (quadtype.U):
2680 This variable, if defined, encodes the type of a quad:
2681 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2683 quadtype (quadtype.U):
2684 This variable defines Quad_t to be something like long, int,
2685 long long, int64_t, or whatever type is used for 64-bit integers.
2687 randbits (randfunc.U):
2688 Indicates how many bits are produced by the function used to
2689 generate normalized random numbers.
2691 randfunc (randfunc.U):
2692 Indicates the name of the random number function to use.
2693 Values include drand48, random, and rand. In C programs,
2694 the 'Drand01' macro is defined to generate uniformly distributed
2695 random numbers over the range [0., 1.[ (see drand01 and nrand).
2697 randseedtype (randfunc.U):
2698 Indicates the type of the argument of the seedfunc.
2700 ranlib (orderlib.U):
2701 This variable is set to the pathname of the ranlib program, if it is
2702 needed to generate random libraries. Set to ":" if ar can generate
2703 random libraries or if random libraries are not supported
2705 rd_nodata (nblock_io.U):
2706 This variable holds the return code from read() when no data is
2707 present. It should be -1, but some systems return 0 when O_NDELAY is
2708 used, which is a shame because you cannot make the difference between
2709 no data and an EOF.. Sigh!
2712 This variable is used internally by Configure to determine the
2713 full pathname (if any) of the rm program. After Configure runs,
2714 the value is reset to a plain "rm" and is not useful.
2717 This variable is defined but not used by Configure.
2718 The value is a plain '' and is not useful.
2721 This variable contains 'true' or 'false' depending whether the
2722 nm extraction should be performed or not, according to the value
2723 of usenm and the flags on the Configure command line.
2725 sPRIEldbl (longdblfio.U):
2726 This variable, if defined, contains the string used by stdio to
2727 format long doubles (format 'E') for output.
2729 sPRIFldbl (longdblfio.U):
2730 This variable, if defined, contains the string used by stdio to
2731 format long doubles (format 'F') for output.
2733 sPRIGldbl (longdblfio.U):
2734 This variable, if defined, contains the string used by stdio to
2735 format long doubles (format 'G') for output.
2737 sPRIX64 (quadfio.U):
2738 This variable, if defined, contains the string used by stdio to
2739 format 64-bit hExADECimAl numbers (format 'X') for output.
2741 sPRId64 (quadfio.U):
2742 This variable, if defined, contains the string used by stdio to
2743 format 64-bit decimal numbers (format 'd') for output.
2745 sPRIeldbl (longdblfio.U):
2746 This variable, if defined, contains the string used by stdio to
2747 format long doubles (format 'e') for output.
2749 sPRIfldbl (longdblfio.U):
2750 This variable, if defined, contains the string used by stdio to
2751 format long doubles (format 'f') for output.
2753 sPRIgldbl (longdblfio.U):
2754 This variable, if defined, contains the string used by stdio to
2755 format long doubles (format 'g') for output.
2757 sPRIi64 (quadfio.U):
2758 This variable, if defined, contains the string used by stdio to
2759 format 64-bit decimal numbers (format 'i') for output.
2761 sPRIo64 (quadfio.U):
2762 This variable, if defined, contains the string used by stdio to
2763 format 64-bit octal numbers (format 'o') for output.
2765 sPRIu64 (quadfio.U):
2766 This variable, if defined, contains the string used by stdio to
2767 format 64-bit unsigned decimal numbers (format 'u') for output.
2769 sPRIx64 (quadfio.U):
2770 This variable, if defined, contains the string used by stdio to
2771 format 64-bit hexadecimal numbers (format 'x') for output.
2773 sched_yield (d_pthread_y.U):
2774 This variable defines the way to yield the execution
2775 of the current thread.
2777 scriptdir (scriptdir.U):
2778 This variable holds the name of the directory in which the user wants
2779 to put publicly scripts for the package in question. It is either
2780 the same directory as for binaries, or a special one that can be
2781 mounted across different architectures, like /usr/share. Programs
2782 must be prepared to deal with ~name expansion.
2784 scriptdirexp (scriptdir.U):
2785 This variable is the same as scriptdir, but is filename expanded
2786 at configuration time, for programs not wanting to bother with it.
2789 This variable is used internally by Configure to determine the
2790 full pathname (if any) of the sed program. After Configure runs,
2791 the value is reset to a plain "sed" and is not useful.
2793 seedfunc (randfunc.U):
2794 Indicates the random number generating seed function.
2795 Values include srand48, srandom, and srand.
2797 selectminbits (selectminbits.U):
2798 This variable holds the minimum number of bits operated by select.
2799 That is, if you do select(n, ...), how many bits at least will be
2800 cleared in the masks if some activity is detected. Usually this
2801 is either n or 32*ceil(n/32), especially many little-endians do
2802 the latter. This is only useful if you have select(), naturally.
2804 selecttype (selecttype.U):
2805 This variable holds the type used for the 2nd, 3rd, and 4th
2806 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2807 is defined, and 'int *' otherwise. This is only useful if you
2808 have select(), naturally.
2811 This variable is defined but not used by Configure.
2812 The value is a plain '' and is not useful.
2815 This variable contains the full pathname of the shell used
2816 on this system to execute Bourne shell scripts. Usually, this will be
2817 /bin/sh, though it's possible that some systems will have /bin/ksh,
2818 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2820 This unit comes before Options.U, so you can't set sh with a '-D'
2821 option, though you can override this (and startsh)
2822 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2825 This variable is defined but not used by Configure.
2826 The value is a plain '' and is not useful.
2828 sharpbang (spitshell.U):
2829 This variable contains the string #! if this system supports that
2832 shmattype (d_shmat.U):
2833 This symbol contains the type of pointer returned by shmat().
2834 It can be 'void *' or 'char *'.
2836 shortsize (intsize.U):
2837 This variable contains the value of the SHORTSIZE symbol which
2838 indicates to the C program how many bytes there are in a short.
2840 shrpenv (libperl.U):
2841 If the user builds a shared libperl.so, then we need to tell the
2842 'perl' executable where it will be able to find the installed libperl.so.
2843 One way to do this on some systems is to set the environment variable
2844 LD_RUN_PATH to the directory that will be the final location of the
2845 shared libperl.so. The makefile can use this with something like
2846 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2848 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2851 See the main perl Makefile.SH for actual working usage.
2852 Alternatively, we might be able to use a command line option such
2853 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2854 $archlibexp/CORE (Linux).
2856 shsharp (spitshell.U):
2857 This variable tells further Configure units whether your sh can
2860 sig_count (sig_name.U):
2861 This variable holds a number larger than the largest valid
2862 signal number. This is usually the same as the NSIG macro.
2864 sig_name (sig_name.U):
2865 This variable holds the signal names, space separated. The leading
2866 SIG in signal name is removed. A ZERO is prepended to the
2867 list. This is currently not used.
2869 sig_name_init (sig_name.U):
2870 This variable holds the signal names, enclosed in double quotes and
2871 separated by commas, suitable for use in the SIG_NAME definition
2872 below. A "ZERO" is prepended to the list, and the list is
2873 terminated with a plain 0. The leading SIG in signal names
2874 is removed. See sig_num.
2876 sig_num (sig_name.U):
2877 This variable holds the signal numbers, space separated. A ZERO is
2878 prepended to the list (corresponding to the fake SIGZERO), and
2879 the list is terminated with a 0. Those numbers correspond to
2880 the value of the signal listed in the same place within the
2883 sig_num_init (sig_name.U):
2884 This variable holds the signal numbers, enclosed in double quotes and
2885 separated by commas, suitable for use in the SIG_NUM definition
2886 below. A "ZERO" is prepended to the list, and the list is
2887 terminated with a plain 0.
2889 signal_t (d_voidsig.U):
2890 This variable holds the type of the signal handler (void or int).
2892 sitearch (sitearch.U):
2893 This variable contains the eventual value of the SITEARCH symbol,
2894 which is the name of the private library for this package. It may
2895 have a ~ on the front. It is up to the makefile to eventually create
2896 this directory while performing installation (with ~ substitution).
2897 The standard distribution will put nothing in this directory.
2898 After perl has been installed, users may install their own local
2899 architecture-dependent modules in this directory with
2900 MakeMaker Makefile.PL
2901 or equivalent. See INSTALL for details.
2903 sitearchexp (sitearch.U):
2904 This variable is the ~name expanded version of sitearch, so that you
2905 may use it directly in Makefiles or shell scripts.
2907 sitebin (sitebin.U):
2908 This variable holds the name of the directory in which the user wants
2909 to put add-on publicly executable files for the package in question. It
2910 is most often a local directory such as /usr/local/bin. Programs using
2911 this variable must be prepared to deal with ~name substitution.
2912 The standard distribution will put nothing in this directory.
2913 After perl has been installed, users may install their own local
2914 executables in this directory with
2915 MakeMaker Makefile.PL
2916 or equivalent. See INSTALL for details.
2918 sitebinexp (sitebin.U):
2919 This is the same as the sitebin variable, but is filename expanded at
2920 configuration time, for use in your makefiles.
2922 sitelib (sitelib.U):
2923 This variable contains the eventual value of the SITELIB symbol,
2924 which is the name of the private library for this package. It may
2925 have a ~ on the front. It is up to the makefile to eventually create
2926 this directory while performing installation (with ~ substitution).
2927 The standard distribution will put nothing in this directory.
2928 After perl has been installed, users may install their own local
2929 architecture-independent modules in this directory with
2930 MakeMaker Makefile.PL
2931 or equivalent. See INSTALL for details.
2933 sitelibexp (sitelib.U):
2934 This variable is the ~name expanded version of sitelib, so that you
2935 may use it directly in Makefiles or shell scripts.
2937 siteprefix (siteprefix.U):
2938 This variable holds the full absolute path of the directory below
2939 which the user will install add-on packages.
2940 See INSTALL for usage and examples.
2942 siteprefixexp (siteprefix.U):
2943 This variable holds the full absolute path of the directory below
2944 which the user will install add-on packages. Derived from siteprefix.
2946 sizesize (sizesize.U):
2947 This variable contains the size of a sizetype in bytes.
2949 sizetype (sizetype.U):
2950 This variable defines sizetype to be something like size_t,
2951 unsigned long, or whatever type is used to declare length
2952 parameters for string functions.
2955 This variable is defined but not used by Configure.
2956 The value is a plain '' and is not useful.
2959 This variable is defined but not used by Configure.
2960 The value is a plain '' and is not useful.
2963 This variable contains a flag which will tell the C compiler and loader
2964 to produce a program running with a small memory model. It is up to
2965 the Makefile to use this.
2968 This variable holds the extension used to identify shared libraries
2969 (also known as shared objects) on the system. Usually set to 'so'.
2971 sockethdr (d_socket.U):
2972 This variable has any cpp '-I' flags needed for socket support.
2974 socketlib (d_socket.U):
2975 This variable has the names of any libraries needed for socket support.
2978 This variable is used internally by Configure to determine the
2979 full pathname (if any) of the sort program. After Configure runs,
2980 the value is reset to a plain "sort" and is not useful.
2982 spackage (package.U):
2983 This variable contains the name of the package being constructed,
2984 with the first letter uppercased, i.e. suitable for starting
2987 spitshell (spitshell.U):
2988 This variable contains the command necessary to spit out a runnable
2989 shell on this system. It is either cat or a grep '-v' for # comments.
2992 This variable contains a flag which will tell the C compiler and loader
2993 to produce a program that will run in separate I and D space, for those
2994 machines that support separation of instruction and data space. It is
2995 up to the Makefile to use this.
2998 This variable holds the path to the package source. It is up to
2999 the Makefile to use this variable and set VPATH accordingly to
3000 find the sources remotely.
3002 ssizetype (ssizetype.U):
3003 This variable defines ssizetype to be something like ssize_t,
3004 long or int. It is used by functions that return a count
3005 of bytes or an error condition. It must be a signed type.
3006 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3008 startperl (startperl.U):
3009 This variable contains the string to put on the front of a perl
3010 script to make sure (hopefully) that it runs with perl and not some
3011 shell. Of course, that leading line must be followed by the classical
3013 eval 'exec perl -S $0 ${1+"$@"}'
3014 if $running_under_some_shell;
3015 to guarantee perl startup should the shell execute the script. Note
3016 that this magic incatation is not understood by csh.
3018 startsh (startsh.U):
3019 This variable contains the string to put on the front of a shell
3020 script to make sure (hopefully) that it runs with sh and not some
3023 static_ext (Extensions.U):
3024 This variable holds a list of XS extension files we want to
3025 link statically into the package. It is used by Makefile.
3027 stdchar (stdchar.U):
3028 This variable conditionally defines STDCHAR to be the type of char
3029 used in stdio.h. It has the values "unsigned char" or "char".
3031 stdio_base (d_stdstdio.U):
3032 This variable defines how, given a FILE pointer, fp, to access the
3033 _base field (or equivalent) of stdio.h's FILE structure. This will
3034 be used to define the macro FILE_base(fp).
3036 stdio_bufsiz (d_stdstdio.U):
3037 This variable defines how, given a FILE pointer, fp, to determine
3038 the number of bytes store in the I/O buffer pointer to by the
3039 _base field (or equivalent) of stdio.h's FILE structure. This will
3040 be used to define the macro FILE_bufsiz(fp).
3042 stdio_cnt (d_stdstdio.U):
3043 This variable defines how, given a FILE pointer, fp, to access the
3044 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3045 be used to define the macro FILE_cnt(fp).
3047 stdio_filbuf (d_stdstdio.U):
3048 This variable defines how, given a FILE pointer, fp, to tell
3049 stdio to refill it's internal buffers (?). This will
3050 be used to define the macro FILE_filbuf(fp).
3052 stdio_ptr (d_stdstdio.U):
3053 This variable defines how, given a FILE pointer, fp, to access the
3054 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3055 be used to define the macro FILE_ptr(fp).
3057 stdio_stream_array (stdio_streams.U):
3058 This variable tells the name of the array holding the stdio streams.
3059 Usual values include _iob, __iob, and __sF.
3061 strings (i_string.U):
3062 This variable holds the full path of the string header that will be
3063 used. Typically /usr/include/string.h or /usr/include/strings.h.
3066 This variable is defined but not used by Configure.
3067 The value is a plain '' and is not useful.
3069 subversion (patchlevel.U):
3070 The subversion level of this package.
3071 The value of subversion comes from the patchlevel.h file.
3072 This is unique to perl.
3075 This variable holds the place where the manual is located on this
3076 system. It is not the place where the user wants to put his manual
3077 pages. Rather it is the place where Configure may look to find manual
3078 for unix commands (section 1 of the manual usually). See mansrc.
3081 This variable is defined but not used by Configure.
3082 The value is a plain '' and is not useful.
3085 This variable is defined but not used by Configure.
3086 The value is a plain '' and is not useful.
3089 This variable is defined but not used by Configure.
3090 The value is a plain '' and is not useful.
3093 This variable is defined but not used by Configure.
3094 The value is a plain '' and is not useful.
3097 This variable is used internally by Configure to determine the
3098 full pathname (if any) of the test program. After Configure runs,
3099 the value is reset to a plain "test" and is not useful.
3101 timeincl (i_time.U):
3102 This variable holds the full path of the included time header(s).
3104 timetype (d_time.U):
3105 This variable holds the type returned by time(). It can be long,
3106 or time_t on BSD sites (in which case <sys/types.h> should be
3107 included). Anyway, the type Time_t should be used.
3110 This variable is used internally by Configure to determine the
3111 full pathname (if any) of the touch program. After Configure runs,
3112 the value is reset to a plain "touch" and is not useful.
3115 This variable is used internally by Configure to determine the
3116 full pathname (if any) of the tr program. After Configure runs,
3117 the value is reset to a plain "tr" and is not useful.
3120 This variable contains the value to be passed to the tr(1)
3121 command to transliterate a newline. Typical values are
3122 '\012' and '\n'. This is needed for EBCDIC systems where
3123 newline is not necessarily '\012'.
3126 This variable is defined but not used by Configure.
3127 The value is a plain '' and is not useful.
3130 This variable is the size of an U16 in bytes.
3133 This variable contains the C type used for Perl's U16.
3136 This variable is the size of an U32 in bytes.
3139 This variable contains the C type used for Perl's U32.
3142 This variable is the size of an U64 in bytes.
3145 This variable contains the C type used for Perl's U64.
3148 This variable is the size of an U8 in bytes.
3151 This variable contains the C type used for Perl's U8.
3154 This variable contains the format string used for printing a Uid_t.
3156 uidsign (uidsign.U):
3157 This variable contains the signedness of a uidtype.
3158 1 for unsigned, -1 for signed.
3160 uidsize (uidsize.U):
3161 This variable contains the size of a uidtype in bytes.
3163 uidtype (uidtype.U):
3164 This variable defines Uid_t to be something like uid_t, int,
3165 ushort, or whatever type is used to declare user ids in the kernel.
3168 This variable is used internally by Configure to determine the
3169 full pathname (if any) of the uname program. After Configure runs,
3170 the value is reset to a plain "uname" and is not useful.
3173 This variable is used internally by Configure to determine the
3174 full pathname (if any) of the uniq program. After Configure runs,
3175 the value is reset to a plain "uniq" and is not useful.
3177 uquadtype (quadtype.U):
3178 This variable defines Uquad_t to be something like unsigned long,
3179 unsigned int, unsigned long long, uint64_t, or whatever type is
3180 used for 64-bit integers.
3182 use64bits (use64bits.U):
3183 This variable conditionally defines the USE_64_BITS symbol,
3184 and indicates that explicit 64-bit interfaces should be used
3188 This variable indicates if the the system supports dynamic
3189 loading of some sort. See also dlsrc and dlobj.
3191 uselargefiles (uselfs.U):
3192 This variable conditionally defines the USE_LARGE_FILES symbol,
3193 and indicates that large file interfaces should be used when
3194 available. The use64bits symbol will also be turned on if necessary.
3196 uselongdouble (uselongdbl.U):
3197 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3198 and indicates that long doubles should be used when available.
3200 uselonglong (uselonglong.U):
3201 This variable conditionally defines the USE_LONG_LONG symbol,
3202 and indicates that long longs should be used when available.
3204 usemorebits (usemorebits.U):
3205 This variable conditionally defines the USE_MORE_BITS symbol,
3206 and indicates that explicit 64-bit interfaces and long doubles
3207 should be used when available.
3209 usemultiplicity (usemultiplicity.U):
3210 This variable conditionally defines the MULTIPLICITY symbol,
3211 and indicates that Perl should be built to use multiplicity.
3213 usemymalloc (mallocsrc.U):
3214 This variable contains y if the malloc that comes with this package
3215 is desired over the system's version of malloc. People often include
3216 special versions of malloc for effiency, but such versions are often
3217 less portable. See also mallocsrc and mallocobj.
3218 If this is 'y', then -lmalloc is removed from $libs.
3221 This variable contains 'true' or 'false' depending whether the
3222 nm extraction is wanted or not.
3224 useopcode (Extensions.U):
3225 This variable holds either 'true' or 'false' to indicate
3226 whether the Opcode extension should be used. The sole
3227 use for this currently is to allow an easy mechanism
3228 for users to skip the Opcode extension from the Configure
3231 useperlio (useperlio.U):
3232 This variable conditionally defines the USE_PERLIO symbol,
3233 and indicates that the PerlIO abstraction should be
3236 useposix (Extensions.U):
3237 This variable holds either 'true' or 'false' to indicate
3238 whether the POSIX extension should be used. The sole
3239 use for this currently is to allow an easy mechanism
3240 for hints files to indicate that POSIX will not compile
3241 on a particular system.
3244 This variable is set to true when the user agrees to use sfio.
3245 It is set to false when sfio is not available or when the user
3246 explicitely requests not to use sfio. It is here primarily so
3247 that command-line settings can override the auto-detection of
3248 d_sfio without running into a "WHOA THERE".
3250 useshrplib (libperl.U):
3251 This variable is set to 'yes' if the user wishes
3252 to build a shared libperl, and 'no' otherwise.
3254 usesocks (usesocks.U):
3255 This variable conditionally defines the USE_SOCKS symbol,
3256 and indicates that Perl should be built to use SOCKS.
3258 usethreads (usethreads.U):
3259 This variable conditionally defines the USE_THREADS symbol,
3260 and indicates that Perl should be built to use threads.
3262 usevendorprefix (vendorprefix.U):
3263 This variable tells whether the vendorprefix
3264 and consequently other vendor* paths are in use.
3266 usevfork (d_vfork.U):
3267 This variable is set to true when the user accepts to use vfork.
3268 It is set to false when no vfork is available or when the user
3269 explicitely requests not to use vfork.
3272 This variable holds the path of the include files, which is
3273 usually /usr/include. It is mainly used by other Configure units.
3276 This variable is defined but not used by Configure.
3277 The value is a plain '' and is not useful.
3279 uvoformat (perlxvf.U):
3280 This variable contains the format string used for printing
3281 a Perl UV as an unsigned octal integer.
3284 This variable is the size of a UV in bytes.
3287 This variable contains the C type used for Perl's UV.
3289 uvuformat (perlxvf.U):
3290 This variable contains the format string used for printing
3291 a Perl UV as an unsigned decimal integer.
3293 uvxformat (perlxvf.U):
3294 This variable contains the format string used for printing
3295 a Perl UV as an unsigned hexadecimal integer.
3297 vendorbin (vendorbin.U):
3298 This variable contains the eventual value of the VENDORBIN symbol.
3299 It may have a ~ on the front.
3300 The standard distribution will put nothing in this directory.
3301 Vendors who distribute perl may wish to place additional
3302 binaries in this directory with
3303 MakeMaker Makefile.PL INSTALLDIRS=vendor
3304 or equivalent. See INSTALL for details.
3306 vendorbinexp (vendorbin.U):
3307 This variable is the ~name expanded version of vendorbin, so that you
3308 may use it directly in Makefiles or shell scripts.
3310 vendorlib (vendorlib.U):
3311 This variable contains the eventual value of the VENDORLIB symbol,
3312 which is the name of the private library for this package.
3313 The standard distribution will put nothing in this directory.
3314 Vendors who distribute perl may wish to place their own
3315 modules in this directory with
3316 MakeMaker Makefile.PL INSTALLDIRS=vendor
3317 or equivalent. See INSTALL for details.
3319 vendorlibexp (vendorlib.U):
3320 This variable is the ~name expanded version of vendorlib, so that you
3321 may use it directly in Makefiles or shell scripts.
3323 vendorprefix (vendorprefix.U):
3324 This variable holds the full absolute path of the directory below
3325 which the vendor will install add-on packages.
3326 See INSTALL for usage and examples.
3328 vendorprefixexp (vendorprefix.U):
3329 This variable holds the full absolute path of the directory below
3330 which the vendor will install add-on packages. Derived from vendorprefix.
3332 version (patchlevel.U):
3333 The full version number of this package. This combines
3334 baserev, patchlevel, and subversion to get the full
3335 version number, including any possible subversions. Care
3336 is taken to use the C locale in order to get something
3337 like 5.004 instead of 5,004. This is unique to perl.
3340 This variable is defined but not used by Configure.
3341 The value is a plain '' and is not useful.
3343 voidflags (voidflags.U):
3344 This variable contains the eventual value of the VOIDFLAGS symbol,
3345 which indicates how much support of the void type is given by this
3346 compiler. See VOIDFLAGS for more info.
3349 This variable holds extra path (space-separated) used to find
3350 libraries on this platform, for example CPU-specific libraries
3351 (on multi-CPU platforms) may be listed here.
3353 xs_apiversion (xs_apiversion.U):
3354 This variable contains the version of the oldest perl binary
3355 compatible with the present perl. perl.c:incpush() and
3356 lib/lib.pm will automatically search in $sitearch for older
3357 directories across major versions back to xs_apiversion.
3358 This is only useful if you have a perl library directory tree
3359 structured like the default one.
3360 See INSTALL for how this works.
3361 The versioned site_perl directory was introduced in 5.005,
3362 so that is the lowest possible value.
3363 Since this can depend on compile time options (such as
3364 bincompat) it is set by Configure. Other non-default sources
3365 of potential incompatibility, such as multiplicity, threads,
3366 debugging, 64bits, sfio, etc., are not checked for currently,
3367 though in principle we could go snooping around in old
3371 This variable is defined but not used by Configure.
3372 The value is a plain '' and is not useful.
3375 This variable is used internally by Configure to determine the
3376 full pathname (if any) of the zip program. After Configure runs,
3377 the value is reset to a plain "zip" and is not useful.