This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Fix printing of uids and gids; regen Configure.
[perl5.git] / Porting / Glossary
CommitLineData
d7418ba7
PP
1This file contains a description of all the shell variables whose value is
2determined by the Configure script. Variables intended for use in C
ebc74a4b
GS
3programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4generates pod documentation for Config.pm from this file--please try to keep
5the formatting regular.]
d7418ba7 6
781b178c
JH
7_a (Unix.U):
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
11
12_exe (Unix.U):
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
15
16_o (Unix.U):
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
20
21afs (afs.U):
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
25 what you are doing.
26
27alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
30
31ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
34
35aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
39
40apiversion (patchlevel.U):
5bf26616
JH
41 MakeMaker will install add-on modules in a directory with the
42 PERL_APIVERSION version number. The value is set manually in
43 patchlevel.h. Normally, for maintenance releases, this is
44 just something like 5.005 or 5.6 or 5.7. That is, it does not
45 include the subversion number and does not change across
46 maintenance releases. This is so that add-on extensions can
47 be shared across maintenance versions. It is unclear how this
48 ought to work for developer versions. If a release breaks
49 binary compatibility, this number should be increased.
781b178c
JH
50
51ar (Loc.U):
5bf26616 52 This variable is used internally by Configure to determine the
781b178c
JH
53 full pathname (if any) of the ar program. After Configure runs,
54 the value is reset to a plain "ar" and is not useful.
55
56archlib (archlib.U):
57 This variable holds the name of the directory in which the user wants
58 to put architecture-dependent public library files for $package.
59 It is most often a local directory such as /usr/local/lib.
60 Programs using this variable must be prepared to deal
61 with filename expansion.
62
63archlibexp (archlib.U):
64 This variable is the same as the archlib variable, but is
65 filename expanded at configuration time, for convenient use.
66
67archname64 (use64bits.U):
68 This variable is used for the 64-bitness part of $archname.
69
70archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
73
74archobjs (Unix.U):
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
79 include os2/os2.obj.
80
81awk (Loc.U):
5bf26616 82 This variable is used internally by Configure to determine the
781b178c
JH
83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
85
86baserev (baserev.U):
87 The base revision level of this package, from the .package file.
88
89bash (Loc.U):
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
92
93bin (bin.U):
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
98
d71b2b6b
JH
99bincompat5005 (bincompat5005.U):
100 This variable contains y if Perl 5.006 should be binary-compatible
101 with Perl 5.005.
102
781b178c
JH
103binexp (bin.U):
104 This is the same as the bin variable, but is filename expanded at
105 configuration time, for use in your makefiles.
106
107bison (Loc.U):
108 This variable is defined but not used by Configure.
109 The value is a plain '' and is not useful.
110
111byacc (Loc.U):
5bf26616 112 This variable is used internally by Configure to determine the
781b178c
JH
113 full pathname (if any) of the byacc program. After Configure runs,
114 the value is reset to a plain "byacc" and is not useful.
115
116byteorder (byteorder.U):
117 This variable holds the byte order. In the following, larger digits
118 indicate more significance. The variable byteorder is either 4321
119 on a big-endian machine, or 1234 on a little-endian, or 87654321
120 on a Cray ... or 3412 with weird order !
121
122c (n.U):
123 This variable contains the \c string if that is what causes the echo
124 command to suppress newline. Otherwise it is null. Correct usage is
125 $echo $n "prompt for a question: $c".
126
127castflags (d_castneg.U):
128 This variable contains a flag that precise difficulties the
129 compiler has casting odd floating values to unsigned long:
130 0 = ok
131 1 = couldn't cast < 0
132 2 = couldn't cast >= 0x80000000
133 4 = couldn't cast in argument expression list
134
135cat (Loc.U):
5bf26616 136 This variable is used internally by Configure to determine the
781b178c
JH
137 full pathname (if any) of the cat program. After Configure runs,
138 the value is reset to a plain "cat" and is not useful.
139
140cc (cc.U):
141 This variable holds the name of a command to execute a C compiler which
142 can resolve multiple global references that happen to have the same
143 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
144
145cccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed with 'cc -c' to compile modules to be used to create a shared
148 library that will be used for dynamic loading. For hpux, this
149 should be +z. It is up to the makefile to use it.
150
151ccdlflags (dlsrc.U):
152 This variable contains any special flags that might need to be
153 passed to cc to link with a shared library for dynamic loading.
154 It is up to the makefile to use it. For sunos 4.1, it should
155 be empty.
156
157ccflags (ccflags.U):
158 This variable contains any additional C compiler flags desired by
159 the user. It is up to the Makefile to use this.
160
161ccsymbols (Cppsym.U):
162 The variable contains the symbols defined by the C compiler alone.
163 The symbols defined by cpp or by cc when it calls cpp are not in
164 this list, see cppsymbols and cppccsymbols.
165 The list is a space-separated list of symbol=value tokens.
166
167cf_by (cf_who.U):
168 Login name of the person who ran the Configure script and answered the
169 questions. This is used to tag both config.sh and config_h.SH.
170
171cf_email (cf_email.U):
172 Electronic mail address of the person who ran Configure. This can be
173 used by units that require the user's e-mail, like MailList.U.
174
175cf_time (cf_who.U):
176 Holds the output of the "date" command when the configuration file was
177 produced. This is used to tag both config.sh and config_h.SH.
178
179chgrp (Loc.U):
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
182
183chmod (Loc.U):
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
186
187chown (Loc.U):
188 This variable is defined but not used by Configure.
189 The value is a plain '' and is not useful.
190
191clocktype (d_times.U):
192 This variable holds the type returned by times(). It can be long,
193 or clock_t on BSD sites (in which case <sys/types.h> should be
194 included).
195
196comm (Loc.U):
5bf26616 197 This variable is used internally by Configure to determine the
781b178c
JH
198 full pathname (if any) of the comm program. After Configure runs,
199 the value is reset to a plain "comm" and is not useful.
200
201compress (Loc.U):
202 This variable is defined but not used by Configure.
203 The value is a plain '' and is not useful.
204
10a67519
JH
205CONFIGDOTSH (Oldsyms.U):
206 This is set to 'true' in config.sh so that a shell script
207 sourcing config.sh can tell if it has been sourced already.
208
781b178c
JH
209contains (contains.U):
210 This variable holds the command to do a grep with a proper return
211 status. On most sane systems it is simply "grep". On insane systems
212 it is a grep followed by a cat followed by a test. This variable
213 is primarily for the use of other Configure units.
214
215cp (Loc.U):
5bf26616 216 This variable is used internally by Configure to determine the
781b178c
JH
217 full pathname (if any) of the cp program. After Configure runs,
218 the value is reset to a plain "cp" and is not useful.
219
220cpio (Loc.U):
221 This variable is defined but not used by Configure.
222 The value is a plain '' and is not useful.
223
224cpp (Loc.U):
5bf26616 225 This variable is used internally by Configure to determine the
781b178c
JH
226 full pathname (if any) of the cpp program. After Configure runs,
227 the value is reset to a plain "cpp" and is not useful.
228
229cpp_stuff (cpp_stuff.U):
230 This variable contains an identification of the catenation mechanism
231 used by the C preprocessor.
232
233cppccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler when
235 when it calls cpp. The symbols defined by the cc alone or cpp
236 alone are not in this list, see ccsymbols and cppsymbols.
237 The list is a space-separated list of symbol=value tokens.
238
239cppflags (ccflags.U):
240 This variable holds the flags that will be passed to the C pre-
241 processor. It is up to the Makefile to use it.
242
243cpplast (cppstdin.U):
244 This variable has the same functionality as cppminus, only it applies
245 to cpprun and not cppstdin.
246
247cppminus (cppstdin.U):
248 This variable contains the second part of the string which will invoke
249 the C preprocessor on the standard input and produce to standard
250 output. This variable will have the value "-" if cppstdin needs
251 a minus to specify standard input, otherwise the value is "".
252
253cpprun (cppstdin.U):
254 This variable contains the command which will invoke a C preprocessor
255 on standard input and put the output to stdout. It is guaranteed not
256 to be a wrapper and may be a null string if no preprocessor can be
257 made directly available. This preprocessor might be different from the
258 one used by the C compiler. Don't forget to append cpplast after the
259 preprocessor options.
260
261cppstdin (cppstdin.U):
262 This variable contains the command which will invoke the C
263 preprocessor on standard input and put the output to stdout.
264 It is primarily used by other Configure units that ask about
265 preprocessor symbols.
266
267cppsymbols (Cppsym.U):
268 The variable contains the symbols defined by the C preprocessor
269 alone. The symbols defined by cc or by cc when it calls cpp are
270 not in this list, see ccsymbols and cppccsymbols.
271 The list is a space-separated list of symbol=value tokens.
272
273crosscompile (crosscompile.U):
274 This variable conditionally defines the CROSSCOMPILE symbol
275 which signifies that the build process is be a cross-compilation.
276 This is normally set by hints files or from Configure command line.
277
278cryptlib (d_crypt.U):
279 This variable holds -lcrypt or the path to a libcrypt.a archive if
280 the crypt() function is not defined in the standard C library. It is
281 up to the Makefile to use this.
282
283csh (Loc.U):
5bf26616 284 This variable is used internally by Configure to determine the
781b178c
JH
285 full pathname (if any) of the csh program. After Configure runs,
286 the value is reset to a plain "csh" and is not useful.
287
288d_access (d_access.U):
289 This variable conditionally defines HAS_ACCESS if the access() system
290 call is available to check for access permissions using real IDs.
291
292d_accessx (d_accessx.U):
293 This variable conditionally defines the HAS_ACCESSX symbol, which
294 indicates to the C program that the accessx() routine is available.
295
296d_alarm (d_alarm.U):
297 This variable conditionally defines the HAS_ALARM symbol, which
298 indicates to the C program that the alarm() routine is available.
299
300d_archlib (archlib.U):
301 This variable conditionally defines ARCHLIB to hold the pathname
302 of architecture-dependent library files for $package. If
303 $archlib is the same as $privlib, then this is set to undef.
304
11dc3f68
JH
305d_atolf (atolf.U):
306 This variable conditionally defines the HAS_ATOLF symbol, which
307 indicates to the C program that the atolf() routine is available.
308
309d_atoll (atoll.U):
310 This variable conditionally defines the HAS_ATOLL symbol, which
311 indicates to the C program that the atoll() routine is available.
312
781b178c
JH
313d_attribut (d_attribut.U):
314 This variable conditionally defines HASATTRIBUTE, which
315 indicates the C compiler can check for function attributes,
316 such as printf formats.
317
318d_bcmp (d_bcmp.U):
319 This variable conditionally defines the HAS_BCMP symbol if
320 the bcmp() routine is available to compare strings.
321
322d_bcopy (d_bcopy.U):
323 This variable conditionally defines the HAS_BCOPY symbol if
324 the bcopy() routine is available to copy strings.
325
d71b2b6b
JH
326d_bincompat5005 (bincompat5005.U):
327 This variable conditionally defines BINCOMPAT5005 so that embed.h
328 can take special action if Perl 5.006 should be binary-compatible
329 with Perl 5.005. This is impossible for builds that use features
330 like threads and multiplicity it is always $undef for those versions.
331
781b178c
JH
332d_bsd (Guess.U):
333 This symbol conditionally defines the symbol BSD when running on a
334 BSD system.
335
336d_bsdgetpgrp (d_getpgrp.U):
337 This variable conditionally defines USE_BSD_GETPGRP if
338 getpgrp needs one arguments whereas USG one needs none.
339
340d_bsdsetpgrp (d_setpgrp.U):
341 This variable conditionally defines USE_BSD_SETPGRP if
342 setpgrp needs two arguments whereas USG one needs none.
343 See also d_setpgid for a POSIX interface.
344
345d_bzero (d_bzero.U):
346 This variable conditionally defines the HAS_BZERO symbol if
347 the bzero() routine is available to set memory to 0.
348
349d_casti32 (d_casti32.U):
350 This variable conditionally defines CASTI32, which indicates
351 whether the C compiler can cast large floats to 32-bit ints.
352
353d_castneg (d_castneg.U):
354 This variable conditionally defines CASTNEG, which indicates
355 wether the C compiler can cast negative float to unsigned.
356
357d_charvspr (d_vprintf.U):
358 This variable conditionally defines CHARVSPRINTF if this system
359 has vsprintf returning type (char*). The trend seems to be to
360 declare it as "int vsprintf()".
361
362d_chown (d_chown.U):
363 This variable conditionally defines the HAS_CHOWN symbol, which
364 indicates to the C program that the chown() routine is available.
365
366d_chroot (d_chroot.U):
367 This variable conditionally defines the HAS_CHROOT symbol, which
368 indicates to the C program that the chroot() routine is available.
369
370d_chsize (d_chsize.U):
371 This variable conditionally defines the CHSIZE symbol, which
372 indicates to the C program that the chsize() routine is available
373 to truncate files. You might need a -lx to get this routine.
374
375d_closedir (d_closedir.U):
376 This variable conditionally defines HAS_CLOSEDIR if closedir() is
377 available.
378
781b178c
JH
379d_const (d_const.U):
380 This variable conditionally defines the HASCONST symbol, which
381 indicates to the C program that this C compiler knows about the
382 const type.
383
384d_crypt (d_crypt.U):
385 This variable conditionally defines the CRYPT symbol, which
386 indicates to the C program that the crypt() routine is available
387 to encrypt passwords and the like.
388
389d_csh (d_csh.U):
390 This variable conditionally defines the CSH symbol, which
391 indicates to the C program that the C-shell exists.
392
393d_cuserid (d_cuserid.U):
394 This variable conditionally defines the HAS_CUSERID symbol, which
395 indicates to the C program that the cuserid() routine is available
396 to get character login names.
397
398d_dbl_dig (d_dbl_dig.U):
399 This variable conditionally defines d_dbl_dig if this system's
400 header files provide DBL_DIG, which is the number of significant
401 digits in a double precision number.
402
781b178c
JH
403d_difftime (d_difftime.U):
404 This variable conditionally defines the HAS_DIFFTIME symbol, which
405 indicates to the C program that the difftime() routine is available.
406
781b178c
JH
407d_dirnamlen (i_dirent.U):
408 This variable conditionally defines DIRNAMLEN, which indicates
409 to the C program that the length of directory entry names is
410 provided by a d_namelen field.
411
412d_dlerror (d_dlerror.U):
413 This variable conditionally defines the HAS_DLERROR symbol, which
414 indicates to the C program that the dlerror() routine is available.
415
416d_dlopen (d_dlopen.U):
417 This variable conditionally defines the HAS_DLOPEN symbol, which
418 indicates to the C program that the dlopen() routine is available.
419
420d_dlsymun (d_dlsymun.U):
421 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
422 indicates that we need to prepend an underscore to the symbol
423 name before calling dlsym().
424
425d_dosuid (d_dosuid.U):
426 This variable conditionally defines the symbol DOSUID, which
427 tells the C program that it should insert setuid emulation code
428 on hosts which have setuid #! scripts disabled.
429
430d_drand48proto (d_drand48proto.U):
431 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
432 which indicates to the C program that the system provides
433 a prototype for the drand48() function. Otherwise, it is
434 up to the program to supply one.
435
436d_dup2 (d_dup2.U):
437 This variable conditionally defines HAS_DUP2 if dup2() is
438 available to duplicate file descriptors.
439
440d_eaccess (d_eaccess.U):
441 This variable conditionally defines the HAS_EACCESS symbol, which
442 indicates to the C program that the eaccess() routine is available.
443
444d_endgrent (d_endgrent.U):
445 This variable conditionally defines the HAS_ENDGRENT symbol, which
446 indicates to the C program that the endgrent() routine is available
447 for sequential access of the group database.
448
449d_endhent (d_endhent.U):
450 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
451 available to close whatever was being used for host queries.
452
453d_endnent (d_endnent.U):
454 This variable conditionally defines HAS_ENDNETENT if endnetent() is
455 available to close whatever was being used for network queries.
456
457d_endpent (d_endpent.U):
458 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
459 available to close whatever was being used for protocol queries.
460
461d_endpwent (d_endpwent.U):
462 This variable conditionally defines the HAS_ENDPWENT symbol, which
463 indicates to the C program that the endpwent() routine is available
464 for sequential access of the passwd database.
465
466d_endsent (d_endsent.U):
467 This variable conditionally defines HAS_ENDSERVENT if endservent() is
468 available to close whatever was being used for service queries.
469
470d_endspent (d_endspent.U):
471 This variable conditionally defines HAS_ENDSPENT if endspent() is
472 available to finalize the scan of SysV shadow password entries.
473
474d_eofnblk (nblock_io.U):
475 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
476 when reading from a non-blocking I/O source.
477
478d_eunice (Guess.U):
479 This variable conditionally defines the symbols EUNICE and VAX, which
480 alerts the C program that it must deal with ideosyncracies of VMS.
481
482d_fchmod (d_fchmod.U):
483 This variable conditionally defines the HAS_FCHMOD symbol, which
484 indicates to the C program that the fchmod() routine is available
485 to change mode of opened files.
486
487d_fchown (d_fchown.U):
488 This variable conditionally defines the HAS_FCHOWN symbol, which
489 indicates to the C program that the fchown() routine is available
490 to change ownership of opened files.
491
492d_fcntl (d_fcntl.U):
493 This variable conditionally defines the HAS_FCNTL symbol, and indicates
494 whether the fcntl() function exists
495
496d_fd_macros (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_MACROS symbol,
498 which indicates if your C compiler knows about the macros which
499 manipulate an fd_set.
500
501d_fd_set (d_fd_set.U):
502 This variable contains the eventual value of the HAS_FD_SET symbol,
503 which indicates if your C compiler knows about the fd_set typedef.
504
505d_fds_bits (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FDS_BITS symbol,
507 which indicates if your fd_set typedef contains the fds_bits member.
508 If you have an fd_set typedef, but the dweebs who installed it did
509 a half-fast job and neglected to provide the macros to manipulate
510 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
511
781b178c
JH
512d_fgetpos (d_fgetpos.U):
513 This variable conditionally defines HAS_FGETPOS if fgetpos() is
514 available to get the file position indicator.
515
781b178c
JH
516d_flexfnam (d_flexfnam.U):
517 This variable conditionally defines the FLEXFILENAMES symbol, which
518 indicates that the system supports filenames longer than 14 characters.
519
781b178c
JH
520d_flock (d_flock.U):
521 This variable conditionally defines HAS_FLOCK if flock() is
522 available to do file locking.
523
781b178c
JH
524d_fork (d_fork.U):
525 This variable conditionally defines the HAS_FORK symbol, which
526 indicates to the C program that the fork() routine is available.
527
528d_fpathconf (d_pathconf.U):
529 This variable conditionally defines the HAS_FPATHCONF symbol, which
530 indicates to the C program that the pathconf() routine is available
531 to determine file-system related limits and options associated
532 with a given open file descriptor.
533
ca24dfc6
LV
534d_fpos64_t (io64.U):
535 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 536
ad27e871 537d_fs_data_s (d_fs_data_s.U):
0545a864
JH
538 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
539 which indicates that the struct fs_data is supported.
540
781b178c
JH
541d_fseeko (d_fseeko.U):
542 This variable conditionally defines the HAS_FSEEKO symbol, which
543 indicates to the C program that the fseeko() routine is available.
544
781b178c
JH
545d_fsetpos (d_fsetpos.U):
546 This variable conditionally defines HAS_FSETPOS if fsetpos() is
547 available to set the file position indicator.
548
0545a864 549d_fstatfs (d_fstatfs.U):
781b178c
JH
550 This variable conditionally defines the HAS_FSTATFS symbol, which
551 indicates to the C program that the fstatfs() routine is available.
552
553d_fstatvfs (d_statvfs.U):
554 This variable conditionally defines the HAS_FSTATVFS symbol, which
555 indicates to the C program that the fstatvfs() routine is available.
556
781b178c
JH
557d_ftello (d_ftello.U):
558 This variable conditionally defines the HAS_FTELLO symbol, which
559 indicates to the C program that the ftello() routine is available.
560
561d_ftime (d_ftime.U):
562 This variable conditionally defines the HAS_FTIME symbol, which indicates
563 that the ftime() routine exists. The ftime() routine is basically
564 a sub-second accuracy clock.
565
781b178c
JH
566d_Gconvert (d_gconvert.U):
567 This variable holds what Gconvert is defined as to convert
568 floating point numbers into strings. It could be 'gconvert'
569 or a more complex macro emulating gconvert with gcvt() or sprintf.
570 Possible values are:
571 d_Gconvert='gconvert((x),(n),(t),(b))'
572 d_Gconvert='gcvt((x),(n),(b))'
573 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
574
575d_getgrent (d_getgrent.U):
576 This variable conditionally defines the HAS_GETGRENT symbol, which
577 indicates to the C program that the getgrent() routine is available
578 for sequential access of the group database.
579
580d_getgrps (d_getgrps.U):
581 This variable conditionally defines the HAS_GETGROUPS symbol, which
582 indicates to the C program that the getgroups() routine is available
583 to get the list of process groups.
584
585d_gethbyaddr (d_gethbyad.U):
586 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
587 indicates to the C program that the gethostbyaddr() routine is available
588 to look up hosts by their IP addresses.
589
590d_gethbyname (d_gethbynm.U):
591 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
592 indicates to the C program that the gethostbyname() routine is available
593 to look up host names in some data base or other.
594
595d_gethent (d_gethent.U):
596 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
597 available to look up host names in some data base or another.
598
599d_gethname (d_gethname.U):
600 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
601 indicates to the C program that the gethostname() routine may be
602 used to derive the host name.
603
604d_gethostprotos (d_gethostprotos.U):
605 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
606 which indicates to the C program that <netdb.h> supplies
607 prototypes for the various gethost*() functions.
608 See also netdbtype.U for probing for various netdb types.
609
610d_getlogin (d_getlogin.U):
611 This variable conditionally defines the HAS_GETLOGIN symbol, which
612 indicates to the C program that the getlogin() routine is available
613 to get the login name.
614
ad27e871
JH
615d_getmnt (d_getmnt.U):
616 This variable conditionally defines the HAS_GETMNT symbol, which
617 indicates to the C program that the getmnt() routine is available
618 to retrieve one or more mount info blocks by filename.
619
781b178c
JH
620d_getmntent (d_getmntent.U):
621 This variable conditionally defines the HAS_GETMNTENT symbol, which
622 indicates to the C program that the getmntent() routine is available
0617aed7 623 to iterate through mounted files to get their mount info.
781b178c
JH
624
625d_getnbyaddr (d_getnbyad.U):
626 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
627 indicates to the C program that the getnetbyaddr() routine is available
628 to look up networks by their IP addresses.
629
630d_getnbyname (d_getnbynm.U):
631 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
632 indicates to the C program that the getnetbyname() routine is available
633 to look up networks by their names.
634
635d_getnent (d_getnent.U):
636 This variable conditionally defines HAS_GETNETENT if getnetent() is
637 available to look up network names in some data base or another.
638
639d_getnetprotos (d_getnetprotos.U):
640 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
641 which indicates to the C program that <netdb.h> supplies
642 prototypes for the various getnet*() functions.
643 See also netdbtype.U for probing for various netdb types.
644
645d_getpbyname (d_getprotby.U):
646 This variable conditionally defines the HAS_GETPROTOBYNAME
647 symbol, which indicates to the C program that the
648 getprotobyname() routine is available to look up protocols
649 by their name.
650
651d_getpbynumber (d_getprotby.U):
652 This variable conditionally defines the HAS_GETPROTOBYNUMBER
653 symbol, which indicates to the C program that the
654 getprotobynumber() routine is available to look up protocols
655 by their number.
656
657d_getpent (d_getpent.U):
658 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
659 available to look up protocols in some data base or another.
660
661d_getpgid (d_getpgid.U):
662 This variable conditionally defines the HAS_GETPGID symbol, which
663 indicates to the C program that the getpgid(pid) function
664 is available to get the process group id.
665
666d_getpgrp2 (d_getpgrp2.U):
667 This variable conditionally defines the HAS_GETPGRP2 symbol, which
668 indicates to the C program that the getpgrp2() (as in DG/UX) routine
669 is available to get the current process group.
670
671d_getpgrp (d_getpgrp.U):
672 This variable conditionally defines HAS_GETPGRP if getpgrp() is
673 available to get the current process group.
674
675d_getppid (d_getppid.U):
676 This variable conditionally defines the HAS_GETPPID symbol, which
677 indicates to the C program that the getppid() routine is available
678 to get the parent process ID.
679
680d_getprior (d_getprior.U):
681 This variable conditionally defines HAS_GETPRIORITY if getpriority()
682 is available to get a process's priority.
683
684d_getprotoprotos (d_getprotoprotos.U):
685 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
686 which indicates to the C program that <netdb.h> supplies
687 prototypes for the various getproto*() functions.
688 See also netdbtype.U for probing for various netdb types.
689
690d_getpwent (d_getpwent.U):
691 This variable conditionally defines the HAS_GETPWENT symbol, which
692 indicates to the C program that the getpwent() routine is available
693 for sequential access of the passwd database.
694
695d_getsbyname (d_getsrvby.U):
696 This variable conditionally defines the HAS_GETSERVBYNAME
697 symbol, which indicates to the C program that the
698 getservbyname() routine is available to look up services
699 by their name.
700
701d_getsbyport (d_getsrvby.U):
702 This variable conditionally defines the HAS_GETSERVBYPORT
703 symbol, which indicates to the C program that the
704 getservbyport() routine is available to look up services
705 by their port.
706
707d_getsent (d_getsent.U):
708 This variable conditionally defines HAS_GETSERVENT if getservent() is
709 available to look up network services in some data base or another.
710
711d_getservprotos (d_getservprotos.U):
712 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
713 which indicates to the C program that <netdb.h> supplies
714 prototypes for the various getserv*() functions.
715 See also netdbtype.U for probing for various netdb types.
716
717d_getspent (d_getspent.U):
718 This variable conditionally defines HAS_GETSPENT if getspent() is
719 available to retrieve SysV shadow password entries sequentially.
720
721d_getspnam (d_getspnam.U):
722 This variable conditionally defines HAS_GETSPNAM if getspnam() is
723 available to retrieve SysV shadow password entries by name.
724
725d_gettimeod (d_ftime.U):
726 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
727 indicates that the gettimeofday() system call exists (to obtain a
728 sub-second accuracy clock). You should probably include <sys/resource.h>.
729
730d_gnulibc (d_gnulibc.U):
731 Defined if we're dealing with the GNU C Library.
732
733d_grpasswd (i_grp.U):
734 This variable conditionally defines GRPASSWD, which indicates
735 that struct group in <grp.h> contains gr_passwd.
736
737d_hasmntopt (d_hasmntopt.U):
738 This variable conditionally defines the HAS_HASMNTOPT symbol, which
739 indicates to the C program that the hasmntopt() routine is available
740 to query the mount options of file systems.
741
742d_htonl (d_htonl.U):
743 This variable conditionally defines HAS_HTONL if htonl() and its
744 friends are available to do network order byte swapping.
745
746d_index (d_strchr.U):
747 This variable conditionally defines HAS_INDEX if index() and
748 rindex() are available for string searching.
749
750d_inetaton (d_inetaton.U):
751 This variable conditionally defines the HAS_INET_ATON symbol, which
752 indicates to the C program that the inet_aton() function is available
753 to parse IP address "dotted-quad" strings.
754
781b178c
JH
755d_int64t (i_inttypes.U):
756 This symbol will be defined if the C compiler supports int64_t.
757
758d_iovec_s (i_sysuio.U):
759 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
760 which indicates that the struct iovec is supported.
761
762d_isascii (d_isascii.U):
763 This variable conditionally defines the HAS_ISASCII constant,
764 which indicates to the C program that isascii() is available.
765
766d_killpg (d_killpg.U):
767 This variable conditionally defines the HAS_KILLPG symbol, which
768 indicates to the C program that the killpg() routine is available
769 to kill process groups.
770
771d_lchown (d_lchown.U):
772 This variable conditionally defines the HAS_LCHOWN symbol, which
773 indicates to the C program that the lchown() routine is available
774 to operate on a symbolic link (instead of following the link).
775
ca24dfc6
LV
776d_ldbl_dig (d_ldbl_dig.U):
777 This variable conditionally defines d_ldbl_dig if this system's
778 header files provide LDBL_DIG, which is the number of significant
779 digits in a long double precision number.
780
781b178c
JH
781d_link (d_link.U):
782 This variable conditionally defines HAS_LINK if link() is
783 available to create hard links.
784
785d_llseek (io64.U):
786 This variable conditionally defines the HAS_LLSEEK symbol, which
787 indicates to the C program that the llseek() routine is available.
788
789d_locconv (d_locconv.U):
790 This variable conditionally defines HAS_LOCALECONV if localeconv() is
791 available for numeric and monetary formatting conventions.
792
781b178c
JH
793d_lockf (d_lockf.U):
794 This variable conditionally defines HAS_LOCKF if lockf() is
795 available to do file locking.
796
797d_longdbl (d_longdbl.U):
798 This variable conditionally defines HAS_LONG_DOUBLE if
799 the long double type is supported.
800
801d_longlong (d_longlong.U):
802 This variable conditionally defines HAS_LONG_LONG if
803 the long long type is supported.
804
781b178c
JH
805d_lstat (d_lstat.U):
806 This variable conditionally defines HAS_LSTAT if lstat() is
807 available to do file stats on symbolic links.
808
781b178c
JH
809d_mblen (d_mblen.U):
810 This variable conditionally defines the HAS_MBLEN symbol, which
811 indicates to the C program that the mblen() routine is available
812 to find the number of bytes in a multibye character.
813
814d_mbstowcs (d_mbstowcs.U):
815 This variable conditionally defines the HAS_MBSTOWCS symbol, which
816 indicates to the C program that the mbstowcs() routine is available
817 to convert a multibyte string into a wide character string.
818
819d_mbtowc (d_mbtowc.U):
820 This variable conditionally defines the HAS_MBTOWC symbol, which
821 indicates to the C program that the mbtowc() routine is available
822 to convert multibyte to a wide character.
823
824d_memchr (d_memchr.U):
825 This variable conditionally defines the HAS_MEMCHR symbol, which
826 indicates to the C program that the memchr() routine is available
827 to locate characters within a C string.
828
829d_memcmp (d_memcmp.U):
830 This variable conditionally defines the HAS_MEMCMP symbol, which
831 indicates to the C program that the memcmp() routine is available
832 to compare blocks of memory.
833
834d_memcpy (d_memcpy.U):
835 This variable conditionally defines the HAS_MEMCPY symbol, which
836 indicates to the C program that the memcpy() routine is available
837 to copy blocks of memory.
838
839d_memmove (d_memmove.U):
840 This variable conditionally defines the HAS_MEMMOVE symbol, which
841 indicates to the C program that the memmove() routine is available
842 to copy potentatially overlapping blocks of memory.
843
844d_memset (d_memset.U):
845 This variable conditionally defines the HAS_MEMSET symbol, which
846 indicates to the C program that the memset() routine is available
847 to set blocks of memory.
848
849d_mkdir (d_mkdir.U):
850 This variable conditionally defines the HAS_MKDIR symbol, which
851 indicates to the C program that the mkdir() routine is available
852 to create directories..
853
854d_mkfifo (d_mkfifo.U):
855 This variable conditionally defines the HAS_MKFIFO symbol, which
856 indicates to the C program that the mkfifo() routine is available.
857
858d_mktime (d_mktime.U):
859 This variable conditionally defines the HAS_MKTIME symbol, which
860 indicates to the C program that the mktime() routine is available.
861
781b178c
JH
862d_msg (d_msg.U):
863 This variable conditionally defines the HAS_MSG symbol, which
864 indicates that the entire msg*(2) library is present.
865
866d_msg_ctrunc (d_socket.U):
867 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
868 which indicates that the MSG_CTRUNC is available. #ifdef is
869 not enough because it may be an enum, glibc has been known to do this.
870
871d_msg_dontroute (d_socket.U):
872 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
873 which indicates that the MSG_DONTROUTE is available. #ifdef is
874 not enough because it may be an enum, glibc has been known to do this.
875
876d_msg_oob (d_socket.U):
877 This variable conditionally defines the HAS_MSG_OOB symbol,
878 which indicates that the MSG_OOB is available. #ifdef is
879 not enough because it may be an enum, glibc has been known to do this.
880
881d_msg_peek (d_socket.U):
882 This variable conditionally defines the HAS_MSG_PEEK symbol,
883 which indicates that the MSG_PEEK is available. #ifdef is
884 not enough because it may be an enum, glibc has been known to do this.
885
886d_msg_proxy (d_socket.U):
887 This variable conditionally defines the HAS_MSG_PROXY symbol,
888 which indicates that the MSG_PROXY is available. #ifdef is
889 not enough because it may be an enum, glibc has been known to do this.
890
891d_msgctl (d_msgctl.U):
892 This variable conditionally defines the HAS_MSGCTL symbol, which
893 indicates to the C program that the msgctl() routine is available.
894
895d_msgget (d_msgget.U):
896 This variable conditionally defines the HAS_MSGGET symbol, which
897 indicates to the C program that the msgget() routine is available.
898
781b178c
JH
899d_msgrcv (d_msgrcv.U):
900 This variable conditionally defines the HAS_MSGRCV symbol, which
901 indicates to the C program that the msgrcv() routine is available.
902
903d_msgsnd (d_msgsnd.U):
904 This variable conditionally defines the HAS_MSGSND symbol, which
905 indicates to the C program that the msgsnd() routine is available.
906
781b178c
JH
907d_mymalloc (mallocsrc.U):
908 This variable conditionally defines MYMALLOC in case other parts
909 of the source want to take special action if MYMALLOC is used.
910 This may include different sorts of profiling or error detection.
911
781b178c
JH
912d_nice (d_nice.U):
913 This variable conditionally defines the HAS_NICE symbol, which
914 indicates to the C program that the nice() routine is available.
915
916d_off64_t (io64.U):
917 This symbol will be defined if the C compiler supports off64_t.
918
781b178c
JH
919d_old_pthread_create_joinable (d_pthrattrj.U):
920 This variable conditionally defines pthread_create_joinable.
921 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
922
923d_oldpthreads (usethreads.U):
924 This variable conditionally defines the OLD_PTHREADS_API symbol,
925 and indicates that Perl should be built to use the old
8c09e4ca 926 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
927 usethreads is set.
928
929d_oldsock (d_socket.U):
930 This variable conditionally defines the OLDSOCKET symbol, which
931 indicates that the BSD socket interface is based on 4.1c and not 4.2.
932
933d_open3 (d_open3.U):
934 This variable conditionally defines the HAS_OPEN3 manifest constant,
935 which indicates to the C program that the 3 argument version of
936 the open(2) function is available.
937
781b178c
JH
938d_pathconf (d_pathconf.U):
939 This variable conditionally defines the HAS_PATHCONF symbol, which
940 indicates to the C program that the pathconf() routine is available
941 to determine file-system related limits and options associated
942 with a given filename.
943
944d_pause (d_pause.U):
945 This variable conditionally defines the HAS_PAUSE symbol, which
946 indicates to the C program that the pause() routine is available
947 to suspend a process until a signal is received.
948
949d_phostname (d_gethname.U):
950 This variable conditionally defines the HAS_PHOSTNAME symbol, which
951 contains the shell command which, when fed to popen(), may be
952 used to derive the host name.
953
954d_pipe (d_pipe.U):
955 This variable conditionally defines the HAS_PIPE symbol, which
956 indicates to the C program that the pipe() routine is available
957 to create an inter-process channel.
958
959d_poll (d_poll.U):
960 This variable conditionally defines the HAS_POLL symbol, which
961 indicates to the C program that the poll() routine is available
962 to poll active file descriptors.
963
964d_portable (d_portable.U):
965 This variable conditionally defines the PORTABLE symbol, which
966 indicates to the C program that it should not assume that it is
967 running on the machine it was compiled on.
968
11dc3f68
JH
969d_PRId64 (quadfio.U):
970 This variable conditionally defines the PERL_PRId64 symbol, which
971 indiciates that stdio has a symbol to print 64-bit decimal numbers.
972
973d_PRIeldbl (longdblfio.U):
974 This variable conditionally defines the PERL_PRIfldlbl symbol, which
975 indiciates that stdio has a symbol to print long doubles.
976
977d_PRIEldbl (longdblfio.U):
978 This variable conditionally defines the PERL_PRIfldlbl symbol, which
979 indiciates that stdio has a symbol to print long doubles.
980
981d_PRIfldbl (longdblfio.U):
982 This variable conditionally defines the PERL_PRIfldlbl symbol, which
983 indiciates that stdio has a symbol to print long doubles.
984
985d_PRIFldbl (longdblfio.U):
986 This variable conditionally defines the PERL_PRIfldlbl symbol, which
987 indiciates that stdio has a symbol to print long doubles.
988
989d_PRIgldbl (longdblfio.U):
990 This variable conditionally defines the PERL_PRIfldlbl symbol, which
991 indiciates that stdio has a symbol to print long doubles.
992
993d_PRIGldbl (longdblfio.U):
994 This variable conditionally defines the PERL_PRIfldlbl symbol, which
995 indiciates that stdio has a symbol to print long doubles.
996
997d_PRIi64 (quadfio.U):
998 This variable conditionally defines the PERL_PRIi64 symbol, which
999 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1000
1001d_PRIo64 (quadfio.U):
1002 This variable conditionally defines the PERL_PRIo64 symbol, which
1003 indiciates that stdio has a symbol to print 64-bit octal numbers.
1004
1005d_PRIu64 (quadfio.U):
1006 This variable conditionally defines the PERL_PRIu64 symbol, which
1007 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1008 numbers.
1009
1010d_PRIx64 (quadfio.U):
1011 This variable conditionally defines the PERL_PRIx64 symbol, which
1012 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1013
1014d_PRIX64 (quadfio.U):
1015 This variable conditionally defines the PERL_PRIX64 symbol, which
1016 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1017
781b178c
JH
1018d_pthread_yield (d_pthread_y.U):
1019 This variable conditionally defines the HAS_PTHREAD_YIELD
1020 symbol if the pthread_yield routine is available to yield
1021 the execution of the current thread.
1022
1023d_pwage (i_pwd.U):
1024 This variable conditionally defines PWAGE, which indicates
1025 that struct passwd contains pw_age.
1026
1027d_pwchange (i_pwd.U):
1028 This variable conditionally defines PWCHANGE, which indicates
1029 that struct passwd contains pw_change.
1030
1031d_pwclass (i_pwd.U):
1032 This variable conditionally defines PWCLASS, which indicates
1033 that struct passwd contains pw_class.
1034
1035d_pwcomment (i_pwd.U):
1036 This variable conditionally defines PWCOMMENT, which indicates
1037 that struct passwd contains pw_comment.
1038
1039d_pwexpire (i_pwd.U):
1040 This variable conditionally defines PWEXPIRE, which indicates
1041 that struct passwd contains pw_expire.
1042
1043d_pwgecos (i_pwd.U):
1044 This variable conditionally defines PWGECOS, which indicates
1045 that struct passwd contains pw_gecos.
1046
1047d_pwpasswd (i_pwd.U):
1048 This variable conditionally defines PWPASSWD, which indicates
1049 that struct passwd contains pw_passwd.
1050
1051d_pwquota (i_pwd.U):
1052 This variable conditionally defines PWQUOTA, which indicates
1053 that struct passwd contains pw_quota.
1054
781b178c
JH
1055d_readdir (d_readdir.U):
1056 This variable conditionally defines HAS_READDIR if readdir() is
1057 available to read directory entries.
1058
1059d_readlink (d_readlink.U):
1060 This variable conditionally defines the HAS_READLINK symbol, which
1061 indicates to the C program that the readlink() routine is available
1062 to read the value of a symbolic link.
1063
781b178c
JH
1064d_rename (d_rename.U):
1065 This variable conditionally defines the HAS_RENAME symbol, which
1066 indicates to the C program that the rename() routine is available
1067 to rename files.
1068
1069d_rewinddir (d_readdir.U):
1070 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1071 available.
1072
1073d_rmdir (d_rmdir.U):
1074 This variable conditionally defines HAS_RMDIR if rmdir() is
1075 available to remove directories.
1076
1077d_safebcpy (d_safebcpy.U):
1078 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1079 the bcopy() routine can do overlapping copies.
1080
1081d_safemcpy (d_safemcpy.U):
1082 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1083 the memcpy() routine can do overlapping copies.
1084
1085d_sanemcmp (d_sanemcmp.U):
1086 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1087 the memcpy() routine is available and can be used to compare relative
1088 magnitudes of chars with their high bits set.
1089
1090d_sched_yield (d_pthread_y.U):
1091 This variable conditionally defines the HAS_SCHED_YIELD
1092 symbol if the sched_yield routine is available to yield
1093 the execution of the current thread.
1094
1095d_scm_rights (d_socket.U):
1096 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1097 which indicates that the SCM_RIGHTS is available. #ifdef is
1098 not enough because it may be an enum, glibc has been known to do this.
1099
781b178c
JH
1100d_seekdir (d_readdir.U):
1101 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1102 available.
1103
1104d_select (d_select.U):
1105 This variable conditionally defines HAS_SELECT if select() is
1106 available to select active file descriptors. A <sys/time.h>
1107 inclusion may be necessary for the timeout field.
1108
1109d_sem (d_sem.U):
1110 This variable conditionally defines the HAS_SEM symbol, which
1111 indicates that the entire sem*(2) library is present.
1112
1113d_semctl (d_semctl.U):
1114 This variable conditionally defines the HAS_SEMCTL symbol, which
1115 indicates to the C program that the semctl() routine is available.
1116
1117d_semctl_semid_ds (d_union_semun.U):
1118 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1119 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1120
1121d_semctl_semun (d_union_semun.U):
1122 This variable conditionally defines USE_SEMCTL_SEMUN, which
1123 indicates that union semun is to be used for semctl IPC_STAT.
1124
1125d_semget (d_semget.U):
1126 This variable conditionally defines the HAS_SEMGET symbol, which
1127 indicates to the C program that the semget() routine is available.
1128
1129d_semop (d_semop.U):
1130 This variable conditionally defines the HAS_SEMOP symbol, which
1131 indicates to the C program that the semop() routine is available.
1132
781b178c
JH
1133d_setegid (d_setegid.U):
1134 This variable conditionally defines the HAS_SETEGID symbol, which
1135 indicates to the C program that the setegid() routine is available
1136 to change the effective gid of the current program.
1137
1138d_seteuid (d_seteuid.U):
1139 This variable conditionally defines the HAS_SETEUID symbol, which
1140 indicates to the C program that the seteuid() routine is available
1141 to change the effective uid of the current program.
1142
1143d_setgrent (d_setgrent.U):
1144 This variable conditionally defines the HAS_SETGRENT symbol, which
1145 indicates to the C program that the setgrent() routine is available
1146 for initializing sequential access to the group database.
1147
1148d_setgrps (d_setgrps.U):
1149 This variable conditionally defines the HAS_SETGROUPS symbol, which
1150 indicates to the C program that the setgroups() routine is available
1151 to set the list of process groups.
1152
1153d_sethent (d_sethent.U):
1154 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1155 available.
1156
1157d_setlinebuf (d_setlnbuf.U):
1158 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1159 indicates to the C program that the setlinebuf() routine is available
1160 to change stderr or stdout from block-buffered or unbuffered to a
1161 line-buffered mode.
1162
1163d_setlocale (d_setlocale.U):
1164 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1165 available to handle locale-specific ctype implementations.
1166
1167d_setnent (d_setnent.U):
1168 This variable conditionally defines HAS_SETNETENT if setnetent() is
1169 available.
1170
1171d_setpent (d_setpent.U):
1172 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1173 available.
1174
1175d_setpgid (d_setpgid.U):
1176 This variable conditionally defines the HAS_SETPGID symbol if the
1177 setpgid(pid, gpid) function is available to set process group ID.
1178
1179d_setpgrp2 (d_setpgrp2.U):
1180 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1181 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1182 is available to set the current process group.
1183
1184d_setpgrp (d_setpgrp.U):
1185 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1186 available to set the current process group.
1187
1188d_setprior (d_setprior.U):
1189 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1190 is available to set a process's priority.
1191
1192d_setpwent (d_setpwent.U):
1193 This variable conditionally defines the HAS_SETPWENT symbol, which
1194 indicates to the C program that the setpwent() routine is available
1195 for initializing sequential access to the passwd database.
1196
1197d_setregid (d_setregid.U):
1198 This variable conditionally defines HAS_SETREGID if setregid() is
1199 available to change the real and effective gid of the current
1200 process.
1201
1202d_setresgid (d_setregid.U):
1203 This variable conditionally defines HAS_SETRESGID if setresgid() is
1204 available to change the real, effective and saved gid of the current
1205 process.
1206
1207d_setresuid (d_setreuid.U):
1208 This variable conditionally defines HAS_SETREUID if setresuid() is
1209 available to change the real, effective and saved uid of the current
1210 process.
1211
1212d_setreuid (d_setreuid.U):
1213 This variable conditionally defines HAS_SETREUID if setreuid() is
1214 available to change the real and effective uid of the current
1215 process.
1216
1217d_setrgid (d_setrgid.U):
1218 This variable conditionally defines the HAS_SETRGID symbol, which
1219 indicates to the C program that the setrgid() routine is available
1220 to change the real gid of the current program.
1221
1222d_setruid (d_setruid.U):
1223 This variable conditionally defines the HAS_SETRUID symbol, which
1224 indicates to the C program that the setruid() routine is available
1225 to change the real uid of the current program.
1226
1227d_setsent (d_setsent.U):
1228 This variable conditionally defines HAS_SETSERVENT if setservent() is
1229 available.
1230
1231d_setsid (d_setsid.U):
1232 This variable conditionally defines HAS_SETSID if setsid() is
1233 available to set the process group ID.
1234
1235d_setspent (d_setspent.U):
1236 This variable conditionally defines HAS_SETSPENT if setspent() is
1237 available to initialize the scan of SysV shadow password entries.
1238
1239d_setvbuf (d_setvbuf.U):
1240 This variable conditionally defines the HAS_SETVBUF symbol, which
1241 indicates to the C program that the setvbuf() routine is available
1242 to change buffering on an open stdio stream.
1243
1244d_sfio (d_sfio.U):
1245 This variable conditionally defines the USE_SFIO symbol,
1246 and indicates whether sfio is available (and should be used).
1247
1248d_shm (d_shm.U):
1249 This variable conditionally defines the HAS_SHM symbol, which
1250 indicates that the entire shm*(2) library is present.
1251
1252d_shmat (d_shmat.U):
1253 This variable conditionally defines the HAS_SHMAT symbol, which
1254 indicates to the C program that the shmat() routine is available.
1255
1256d_shmatprototype (d_shmat.U):
1257 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1258 symbol, which indicates that sys/shm.h has a prototype for
1259 shmat.
1260
1261d_shmctl (d_shmctl.U):
1262 This variable conditionally defines the HAS_SHMCTL symbol, which
1263 indicates to the C program that the shmctl() routine is available.
1264
1265d_shmdt (d_shmdt.U):
1266 This variable conditionally defines the HAS_SHMDT symbol, which
1267 indicates to the C program that the shmdt() routine is available.
1268
1269d_shmget (d_shmget.U):
1270 This variable conditionally defines the HAS_SHMGET symbol, which
1271 indicates to the C program that the shmget() routine is available.
1272
1273d_sigaction (d_sigaction.U):
1274 This variable conditionally defines the HAS_SIGACTION symbol, which
1275 indicates that the Vr4 sigaction() routine is available.
1276
1277d_sigsetjmp (d_sigsetjmp.U):
1278 This variable conditionally defines the HAS_SIGSETJMP symbol,
1279 which indicates that the sigsetjmp() routine is available to
1280 call setjmp() and optionally save the process's signal mask.
1281
1282d_socket (d_socket.U):
1283 This variable conditionally defines HAS_SOCKET, which indicates
1284 that the BSD socket interface is supported.
1285
1286d_sockpair (d_socket.U):
1287 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1288 indicates that the BSD socketpair() is supported.
1289
68d4903c
JH
1290d_sqrtl (d_sqrtl.U):
1291 This variable conditionally defines the HAS_SQRTL symbol, which
1292 indicates to the C program that the sqrtl() routine is available.
1293
781b178c
JH
1294d_statblks (d_statblks.U):
1295 This variable conditionally defines USE_STAT_BLOCKS
1296 if this system has a stat structure declaring
1297 st_blksize and st_blocks.
1298
ad27e871 1299d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1300 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
1301 symbol, which indicates to struct statfs from has f_flags member.
1302 This kind of struct statfs is coming from sys/mount.h (BSD),
1303 not from sys/statfs.h (SYSV).
1304
ad27e871 1305d_statfs_s (d_statfs_s.U):
0545a864
JH
1306 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1307 which indicates that the struct statfs is supported.
1308
781b178c
JH
1309d_statvfs (d_statvfs.U):
1310 This variable conditionally defines the HAS_STATVFS symbol, which
1311 indicates to the C program that the statvfs() routine is available.
1312
1313d_stdio_cnt_lval (d_stdstdio.U):
1314 This variable conditionally defines STDIO_CNT_LVALUE if the
1315 FILE_cnt macro can be used as an lvalue.
1316
1317d_stdio_ptr_lval (d_stdstdio.U):
1318 This variable conditionally defines STDIO_PTR_LVALUE if the
1319 FILE_ptr macro can be used as an lvalue.
1320
1321d_stdio_stream_array (stdio_streams.U):
1322 This variable tells whether there is an array holding
1323 the stdio streams.
1324
1325d_stdiobase (d_stdstdio.U):
1326 This variable conditionally defines USE_STDIO_BASE if this system
1327 has a FILE structure declaring a usable _base field (or equivalent)
1328 in stdio.h.
1329
1330d_stdstdio (d_stdstdio.U):
1331 This variable conditionally defines USE_STDIO_PTR if this system
1332 has a FILE structure declaring usable _ptr and _cnt fields (or
1333 equivalent) in stdio.h.
1334
781b178c
JH
1335d_strchr (d_strchr.U):
1336 This variable conditionally defines HAS_STRCHR if strchr() and
1337 strrchr() are available for string searching.
1338
1339d_strcoll (d_strcoll.U):
1340 This variable conditionally defines HAS_STRCOLL if strcoll() is
1341 available to compare strings using collating information.
1342
1343d_strctcpy (d_strctcpy.U):
1344 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1345 indicates to the C program that this C compiler knows how to copy
1346 structures.
1347
1348d_strerrm (d_strerror.U):
1349 This variable holds what Strerrr is defined as to translate an error
1350 code condition into an error message string. It could be 'strerror'
1351 or a more complex macro emulating strrror with sys_errlist[], or the
1352 "unknown" string when both strerror and sys_errlist are missing.
1353
1354d_strerror (d_strerror.U):
1355 This variable conditionally defines HAS_STRERROR if strerror() is
1356 available to translate error numbers to strings.
1357
1358d_strtod (d_strtod.U):
1359 This variable conditionally defines the HAS_STRTOD symbol, which
1360 indicates to the C program that the strtod() routine is available
1361 to provide better numeric string conversion than atof().
1362
1363d_strtol (d_strtol.U):
1364 This variable conditionally defines the HAS_STRTOL symbol, which
1365 indicates to the C program that the strtol() routine is available
1366 to provide better numeric string conversion than atoi() and friends.
1367
1368d_strtoul (d_strtoul.U):
1369 This variable conditionally defines the HAS_STRTOUL symbol, which
1370 indicates to the C program that the strtoul() routine is available
1371 to provide conversion of strings to unsigned long.
1372
11dc3f68
JH
1373d_strtoull (strtoull.U):
1374 This variable conditionally defines the HAS_STRTOULL symbol, which
1375 indicates to the C program that the strtoull() routine is available.
1376
781b178c
JH
1377d_strxfrm (d_strxfrm.U):
1378 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1379 available to transform strings.
1380
1381d_suidsafe (d_dosuid.U):
1382 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1383 if setuid scripts can be secure. This test looks in /dev/fd/.
1384
1385d_symlink (d_symlink.U):
1386 This variable conditionally defines the HAS_SYMLINK symbol, which
1387 indicates to the C program that the symlink() routine is available
1388 to create symbolic links.
1389
1390d_syscall (d_syscall.U):
1391 This variable conditionally defines HAS_SYSCALL if syscall() is
1392 available call arbitrary system calls.
1393
1394d_sysconf (d_sysconf.U):
1395 This variable conditionally defines the HAS_SYSCONF symbol, which
1396 indicates to the C program that the sysconf() routine is available
1397 to determine system related limits and options.
1398
1399d_sysernlst (d_strerror.U):
1400 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1401 is available to translate error numbers to the symbolic name.
1402
1403d_syserrlst (d_strerror.U):
1404 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1405 available to translate error numbers to strings.
1406
1407d_system (d_system.U):
1408 This variable conditionally defines HAS_SYSTEM if system() is
1409 available to issue a shell command.
1410
1411d_tcgetpgrp (d_tcgtpgrp.U):
1412 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1413 indicates to the C program that the tcgetpgrp() routine is available.
1414 to get foreground process group ID.
1415
1416d_tcsetpgrp (d_tcstpgrp.U):
1417 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1418 indicates to the C program that the tcsetpgrp() routine is available
1419 to set foreground process group ID.
1420
781b178c
JH
1421d_telldir (d_readdir.U):
1422 This variable conditionally defines HAS_TELLDIR if telldir() is
1423 available.
1424
1425d_telldirproto (d_telldirproto.U):
1426 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1427 which indicates to the C program that the system provides
1428 a prototype for the telldir() function. Otherwise, it is
1429 up to the program to supply one.
1430
1431d_time (d_time.U):
1432 This variable conditionally defines the HAS_TIME symbol, which indicates
1433 that the time() routine exists. The time() routine is normaly
1434 provided on UNIX systems.
1435
1436d_times (d_times.U):
1437 This variable conditionally defines the HAS_TIMES symbol, which indicates
1438 that the times() routine exists. The times() routine is normaly
1439 provided on UNIX systems. You may have to include <sys/times.h>.
1440
781b178c
JH
1441d_truncate (d_truncate.U):
1442 This variable conditionally defines HAS_TRUNCATE if truncate() is
1443 available to truncate files.
1444
1445d_tzname (d_tzname.U):
1446 This variable conditionally defines HAS_TZNAME if tzname[] is
1447 available to access timezone names.
1448
1449d_umask (d_umask.U):
1450 This variable conditionally defines the HAS_UMASK symbol, which
1451 indicates to the C program that the umask() routine is available.
1452 to set and get the value of the file creation mask.
1453
1454d_uname (d_gethname.U):
1455 This variable conditionally defines the HAS_UNAME symbol, which
1456 indicates to the C program that the uname() routine may be
1457 used to derive the host name.
1458
1459d_union_semun (d_union_semun.U):
1460 This variable conditionally defines HAS_UNION_SEMUN if the
1461 union semun is defined by including <sys/sem.h>.
1462
0545a864
JH
1463d_ustat (d_ustat.U):
1464 This variable conditionally defines HAS_USTAT if ustat() is
1465 available to query file system statistics by dev_t.
1466
0617aed7
JH
1467d_vendorbin (vendorbin.U):
1468 This variable conditionally defines PERL_VENDORBIN.
1469
a3635516
JH
1470d_vendorlib (vendorlib.U):
1471 This variable conditionally defines PERL_VENDORLIB.
1472
781b178c
JH
1473d_vfork (d_vfork.U):
1474 This variable conditionally defines the HAS_VFORK symbol, which
1475 indicates the vfork() routine is available.
1476
1477d_void_closedir (d_closedir.U):
1478 This variable conditionally defines VOID_CLOSEDIR if closedir()
1479 does not return a value.
1480
1481d_voidsig (d_voidsig.U):
1482 This variable conditionally defines VOIDSIG if this system
1483 declares "void (*signal(...))()" in signal.h. The old way was to
1484 declare it as "int (*signal(...))()".
1485
1486d_voidtty (i_sysioctl.U):
1487 This variable conditionally defines USE_IOCNOTTY to indicate that the
1488 ioctl() call with TIOCNOTTY should be used to void tty association.
1489 Otherwise (on USG probably), it is enough to close the standard file
1490 decriptors and do a setpgrp().
1491
1492d_volatile (d_volatile.U):
1493 This variable conditionally defines the HASVOLATILE symbol, which
1494 indicates to the C program that this C compiler knows about the
1495 volatile declaration.
1496
1497d_vprintf (d_vprintf.U):
1498 This variable conditionally defines the HAS_VPRINTF symbol, which
1499 indicates to the C program that the vprintf() routine is available
1500 to printf with a pointer to an argument list.
1501
1502d_wait4 (d_wait4.U):
1503 This variable conditionally defines the HAS_WAIT4 symbol, which
1504 indicates the wait4() routine is available.
1505
1506d_waitpid (d_waitpid.U):
1507 This variable conditionally defines HAS_WAITPID if waitpid() is
1508 available to wait for child process.
1509
1510d_wcstombs (d_wcstombs.U):
1511 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1512 indicates to the C program that the wcstombs() routine is available
1513 to convert wide character strings to multibyte strings.
1514
1515d_wctomb (d_wctomb.U):
1516 This variable conditionally defines the HAS_WCTOMB symbol, which
1517 indicates to the C program that the wctomb() routine is available
1518 to convert a wide character to a multibyte.
1519
781b178c
JH
1520d_xenix (Guess.U):
1521 This variable conditionally defines the symbol XENIX, which alerts
1522 the C program that it runs under Xenix.
1523
1524date (Loc.U):
5bf26616 1525 This variable is used internally by Configure to determine the
781b178c
JH
1526 full pathname (if any) of the date program. After Configure runs,
1527 the value is reset to a plain "date" and is not useful.
1528
1529db_hashtype (i_db.U):
1530 This variable contains the type of the hash structure element
1531 in the <db.h> header file. In older versions of DB, it was
1532 int, while in newer ones it is u_int32_t.
1533
1534db_prefixtype (i_db.U):
1535 This variable contains the type of the prefix structure element
1536 in the <db.h> header file. In older versions of DB, it was
1537 int, while in newer ones it is size_t.
1538
1539defvoidused (voidflags.U):
1540 This variable contains the default value of the VOIDUSED symbol (15).
1541
1542direntrytype (i_dirent.U):
1543 This symbol is set to 'struct direct' or 'struct dirent' depending on
1544 whether dirent is available or not. You should use this pseudo type to
1545 portably declare your directory entries.
1546
1547dlext (dlext.U):
1548 This variable contains the extension that is to be used for the
1549 dynamically loaded modules that perl generaties.
1550
1551dlsrc (dlsrc.U):
1552 This variable contains the name of the dynamic loading file that
1553 will be used with the package.
1554
1555doublesize (doublesize.U):
1556 This variable contains the value of the DOUBLESIZE symbol, which
1557 indicates to the C program how many bytes there are in a double.
1558
1559drand01 (randfunc.U):
1560 Indicates the macro to be used to generate normalized
1561 random numbers. Uses randfunc, often divided by
1562 (double) (((unsigned long) 1 << randbits)) in order to
1563 normalize the result.
1564 In C programs, the macro 'Drand01' is mapped to drand01.
1565
1566dynamic_ext (Extensions.U):
1567 This variable holds a list of XS extension files we want to
1568 link dynamically into the package. It is used by Makefile.
1569
1570eagain (nblock_io.U):
1571 This variable bears the symbolic errno code set by read() when no
1572 data is present on the file and non-blocking I/O was enabled (otherwise,
1573 read() blocks naturally).
1574
1575ebcdic (ebcdic.U):
1576 This variable conditionally defines EBCDIC if this
1577 system uses EBCDIC encoding. Among other things, this
1578 means that the character ranges are not contiguous.
1579 See trnl.U
1580
1581echo (Loc.U):
5bf26616 1582 This variable is used internally by Configure to determine the
781b178c
JH
1583 full pathname (if any) of the echo program. After Configure runs,
1584 the value is reset to a plain "echo" and is not useful.
1585
1586egrep (Loc.U):
5bf26616 1587 This variable is used internally by Configure to determine the
781b178c
JH
1588 full pathname (if any) of the egrep program. After Configure runs,
1589 the value is reset to a plain "egrep" and is not useful.
1590
1591emacs (Loc.U):
1592 This variable is defined but not used by Configure.
1593 The value is a plain '' and is not useful.
1594
1595eunicefix (Init.U):
1596 When running under Eunice this variable contains a command which will
1597 convert a shell script to the proper form of text file for it to be
1598 executable by the shell. On other systems it is a no-op.
1599
1600exe_ext (Unix.U):
1601 This is an old synonym for _exe.
1602
1603expr (Loc.U):
5bf26616 1604 This variable is used internally by Configure to determine the
781b178c
JH
1605 full pathname (if any) of the expr program. After Configure runs,
1606 the value is reset to a plain "expr" and is not useful.
1607
1608extensions (Extensions.U):
1609 This variable holds a list of all extension files (both XS and
1610 non-xs linked into the package. It is propagated to Config.pm
1611 and is typically used to test whether a particular extesion
1612 is available.
1613
1614fflushall (fflushall.U):
1615 This symbol, if defined, tells that to flush
1616 all pending stdio output one must loop through all
1617 the stdio file handles stored in an array and fflush them.
1618 Note that if fflushNULL is defined, fflushall will not
1619 even be probed for and will be left undefined.
1620
1621fflushNULL (fflushall.U):
1622 This symbol, if defined, tells that fflush(NULL) does flush
1623 all pending stdio output.
1624
1625find (Loc.U):
1626 This variable is defined but not used by Configure.
1627 The value is a plain '' and is not useful.
1628
1629firstmakefile (Unix.U):
1630 This variable defines the first file searched by make. On unix,
1631 it is makefile (then Makefile). On case-insensitive systems,
1632 it might be something else. This is only used to deal with
1633 convoluted make depend tricks.
1634
1635flex (Loc.U):
1636 This variable is defined but not used by Configure.
1637 The value is a plain '' and is not useful.
1638
1639fpostype (fpostype.U):
1640 This variable defines Fpos_t to be something like fpost_t, long,
1641 uint, or whatever type is used to declare file positions in libc.
1642
1643freetype (mallocsrc.U):
1644 This variable contains the return type of free(). It is usually
1645 void, but occasionally int.
1646
1647full_ar (Loc_ar.U):
1648 This variable contains the full pathname to 'ar', whether or
1649 not the user has specified 'portability'. This is only used
1650 in the Makefile.SH.
1651
1652full_csh (d_csh.U):
1653 This variable contains the full pathname to 'csh', whether or
1654 not the user has specified 'portability'. This is only used
1655 in the compiled C program, and we assume that all systems which
1656 can share this executable will have the same full pathname to
1657 'csh.'
1658
1659full_sed (Loc_sed.U):
1660 This variable contains the full pathname to 'sed', whether or
1661 not the user has specified 'portability'. This is only used
1662 in the compiled C program, and we assume that all systems which
1663 can share this executable will have the same full pathname to
1664 'sed.'
1665
1666gccversion (cc.U):
1667 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1668 indicate whether the compiler is version 1 or 2. This is used in
1669 setting some of the default cflags. It is set to '' if not gcc.
1670
785fb66b
JH
1671gidsign (gidsign.U):
1672 This variable contains the signedness of a gidtype.
1673 1 for unsigned, -1 for signed.
1674
1675gidsize (gidsize.U):
1676 This variable contains the size of a gidtype in bytes.
1677
781b178c
JH
1678gidtype (gidtype.U):
1679 This variable defines Gid_t to be something like gid_t, int,
1680 ushort, or whatever type is used to declare the return type
1681 of getgid(). Typically, it is the type of group ids in the kernel.
1682
1683glibpth (libpth.U):
1684 This variable holds the general path (space-separated) used to
1685 find libraries. It may contain directories that do not exist on
1686 this platform, libpth is the cleaned-up version.
1687
1688grep (Loc.U):
5bf26616 1689 This variable is used internally by Configure to determine the
781b178c
JH
1690 full pathname (if any) of the grep program. After Configure runs,
1691 the value is reset to a plain "grep" and is not useful.
1692
1693groupcat (nis.U):
1694 This variable contains a command that produces the text of the
1695 /etc/group file. This is normally "cat /etc/group", but can be
1696 "ypcat group" when NIS is used.
1697
1698groupstype (groupstype.U):
1699 This variable defines Groups_t to be something like gid_t, int,
1700 ushort, or whatever type is used for the second argument to
1701 getgroups() and setgroups(). Usually, this is the same as
1702 gidtype (gid_t), but sometimes it isn't.
1703
1704gzip (Loc.U):
5bf26616 1705 This variable is used internally by Configure to determine the
781b178c
JH
1706 full pathname (if any) of the gzip program. After Configure runs,
1707 the value is reset to a plain "gzip" and is not useful.
1708
1709h_fcntl (h_fcntl.U):
1710 This is variable gets set in various places to tell i_fcntl that
1711 <fcntl.h> should be included.
1712
1713h_sysfile (h_sysfile.U):
1714 This is variable gets set in various places to tell i_sys_file that
1715 <sys/file.h> should be included.
1716
1717hint (Oldconfig.U):
1718 Gives the type of hints used for previous answers. May be one of
1719 "default", "recommended" or "previous".
1720
1721hostcat (nis.U):
1722 This variable contains a command that produces the text of the
1723 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1724 "ypcat hosts" when NIS is used.
1725
1726huge (models.U):
1727 This variable contains a flag which will tell the C compiler and loader
1728 to produce a program running with a huge memory model. If the
1729 huge model is not supported, contains the flag to produce large
1730 model programs. It is up to the Makefile to use this.
1731
1732i_arpainet (i_arpainet.U):
1733 This variable conditionally defines the I_ARPA_INET symbol,
1734 and indicates whether a C program should include <arpa/inet.h>.
1735
1736i_bsdioctl (i_sysioctl.U):
1737 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1738 indicates to the C program that <sys/bsdioctl.h> exists and should
1739 be included.
1740
1741i_db (i_db.U):
1742 This variable conditionally defines the I_DB symbol, and indicates
1743 whether a C program may include Berkeley's DB include file <db.h>.
1744
1745i_dbm (i_dbm.U):
1746 This variable conditionally defines the I_DBM symbol, which
1747 indicates to the C program that <dbm.h> exists and should
1748 be included.
1749
1750i_dirent (i_dirent.U):
1751 This variable conditionally defines I_DIRENT, which indicates
1752 to the C program that it should include <dirent.h>.
1753
1754i_dld (i_dld.U):
1755 This variable conditionally defines the I_DLD symbol, which
1756 indicates to the C program that <dld.h> (GNU dynamic loading)
1757 exists and should be included.
1758
1759i_dlfcn (i_dlfcn.U):
1760 This variable conditionally defines the I_DLFCN symbol, which
1761 indicates to the C program that <dlfcn.h> exists and should
1762 be included.
1763
1764i_fcntl (i_fcntl.U):
1765 This variable controls the value of I_FCNTL (which tells
1766 the C program to include <fcntl.h>).
1767
1768i_float (i_float.U):
1769 This variable conditionally defines the I_FLOAT symbol, and indicates
1770 whether a C program may include <float.h> to get symbols like DBL_MAX
1771 or DBL_MIN, i.e. machine dependent floating point values.
1772
1773i_gdbm (i_gdbm.U):
1774 This variable conditionally defines the I_GDBM symbol, which
1775 indicates to the C program that <gdbm.h> exists and should
1776 be included.
1777
1778i_grp (i_grp.U):
1779 This variable conditionally defines the I_GRP symbol, and indicates
1780 whether a C program should include <grp.h>.
1781
1782i_inttypes (i_inttypes.U):
1783 This variable conditionally defines the I_INTTYPES symbol,
1784 and indicates whether a C program should include <inttypes.h>.
1785
1786i_limits (i_limits.U):
1787 This variable conditionally defines the I_LIMITS symbol, and indicates
1788 whether a C program may include <limits.h> to get symbols like WORD_BIT
1789 and friends.
1790
1791i_locale (i_locale.U):
1792 This variable conditionally defines the I_LOCALE symbol,
1793 and indicates whether a C program should include <locale.h>.
1794
1795i_machcthr (i_machcthr.U):
1796 This variable conditionally defines the I_MACH_CTHREADS symbol,
1797 and indicates whether a C program should include <mach/cthreads.h>.
1798
1799i_malloc (i_malloc.U):
1800 This variable conditionally defines the I_MALLOC symbol, and indicates
1801 whether a C program should include <malloc.h>.
1802
1803i_math (i_math.U):
1804 This variable conditionally defines the I_MATH symbol, and indicates
1805 whether a C program may include <math.h>.
1806
1807i_memory (i_memory.U):
1808 This variable conditionally defines the I_MEMORY symbol, and indicates
1809 whether a C program should include <memory.h>.
1810
1811i_mntent (i_mntent.U):
1812 This variable conditionally defines the I_MNTENT symbol, and indicates
1813 whether a C program should include <mntent.h>.
1814
1815i_ndbm (i_ndbm.U):
1816 This variable conditionally defines the I_NDBM symbol, which
1817 indicates to the C program that <ndbm.h> exists and should
1818 be included.
1819
1820i_netdb (i_netdb.U):
1821 This variable conditionally defines the I_NETDB symbol, and indicates
1822 whether a C program should include <netdb.h>.
1823
1824i_neterrno (i_neterrno.U):
1825 This variable conditionally defines the I_NET_ERRNO symbol, which
1826 indicates to the C program that <net/errno.h> exists and should
1827 be included.
1828
1829i_netinettcp (i_netinettcp.U):
1830 This variable conditionally defines the I_NETINET_TCP symbol,
1831 and indicates whether a C program should include <netinet/tcp.h>.
1832
1833i_niin (i_niin.U):
1834 This variable conditionally defines I_NETINET_IN, which indicates
1835 to the C program that it should include <netinet/in.h>. Otherwise,
1836 you may try <sys/in.h>.
1837
1838i_poll (i_poll.U):
1839 This variable conditionally defines the I_POLL symbol, and indicates
1840 whether a C program should include <poll.h>.
1841
1842i_pthread (i_pthread.U):
190b66db 1843 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
1844 and indicates whether a C program should include <pthread.h>.
1845
1846i_pwd (i_pwd.U):
1847 This variable conditionally defines I_PWD, which indicates
1848 to the C program that it should include <pwd.h>.
1849
1850i_rpcsvcdbm (i_dbm.U):
1851 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1852 indicates to the C program that <rpcsvc/dbm.h> exists and should
1853 be included. Some System V systems might need this instead of <dbm.h>.
1854
1855i_sfio (i_sfio.U):
1856 This variable conditionally defines the I_SFIO symbol,
1857 and indicates whether a C program should include <sfio.h>.
1858
1859i_sgtty (i_termio.U):
1860 This variable conditionally defines the I_SGTTY symbol, which
1861 indicates to the C program that it should include <sgtty.h> rather
1862 than <termio.h>.
1863
1864i_shadow (i_shadow.U):
1865 This variable conditionally defines the I_SHADOW symbol, and indicates
1866 whether a C program should include <shadow.h>.
1867
1868i_socks (i_socks.U):
1869 This variable conditionally defines the I_SOCKS symbol, and indicates
1870 whether a C program should include <socks.h>.
1871
1872i_stdarg (i_varhdr.U):
1873 This variable conditionally defines the I_STDARG symbol, which
1874 indicates to the C program that <stdarg.h> exists and should
1875 be included.
1876
1877i_stddef (i_stddef.U):
1878 This variable conditionally defines the I_STDDEF symbol, which
1879 indicates to the C program that <stddef.h> exists and should
1880 be included.
1881
1882i_stdlib (i_stdlib.U):
1883 This variable conditionally defines the I_STDLIB symbol, which
1884 indicates to the C program that <stdlib.h> exists and should
1885 be included.
1886
1887i_string (i_string.U):
1888 This variable conditionally defines the I_STRING symbol, which
1889 indicates that <string.h> should be included rather than <strings.h>.
1890
1891i_sysaccess (i_sysaccess.U):
1892 This variable conditionally defines the I_SYS_ACCESS symbol,
1893 and indicates whether a C program should include <sys/access.h>.
1894
1895i_sysdir (i_sysdir.U):
1896 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1897 whether a C program should include <sys/dir.h>.
1898
1899i_sysfile (i_sysfile.U):
1900 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1901 whether a C program should include <sys/file.h> to get R_OK and friends.
1902
1903i_sysfilio (i_sysioctl.U):
1904 This variable conditionally defines the I_SYS_FILIO symbol, which
1905 indicates to the C program that <sys/filio.h> exists and should
1906 be included in preference to <sys/ioctl.h>.
1907
1908i_sysin (i_niin.U):
1909 This variable conditionally defines I_SYS_IN, which indicates
1910 to the C program that it should include <sys/in.h> instead of
1911 <netinet/in.h>.
1912
1913i_sysioctl (i_sysioctl.U):
1914 This variable conditionally defines the I_SYS_IOCTL symbol, which
1915 indicates to the C program that <sys/ioctl.h> exists and should
1916 be included.
1917
781b178c
JH
1918i_sysmount (i_sysmount.U):
1919 This variable conditionally defines the I_SYSMOUNT symbol,
1920 and indicates whether a C program should include <sys/mount.h>.
1921
1922i_sysndir (i_sysndir.U):
1923 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1924 whether a C program should include <sys/ndir.h>.
1925
1926i_sysparam (i_sysparam.U):
1927 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1928 whether a C program should include <sys/param.h>.
1929
1930i_sysresrc (i_sysresrc.U):
1931 This variable conditionally defines the I_SYS_RESOURCE symbol,
1932 and indicates whether a C program should include <sys/resource.h>.
1933
1934i_syssecrt (i_syssecrt.U):
1935 This variable conditionally defines the I_SYS_SECURITY symbol,
1936 and indicates whether a C program should include <sys/security.h>.
1937
1938i_sysselct (i_sysselct.U):
1939 This variable conditionally defines I_SYS_SELECT, which indicates
1940 to the C program that it should include <sys/select.h> in order to
1941 get the definition of struct timeval.
1942
1943i_syssockio (i_sysioctl.U):
1944 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1945 C program that socket ioctl codes may be found in <sys/sockio.h>
1946 instead of <sys/ioctl.h>.
1947
1948i_sysstat (i_sysstat.U):
1949 This variable conditionally defines the I_SYS_STAT symbol,
1950 and indicates whether a C program should include <sys/stat.h>.
1951
0545a864
JH
1952i_sysstatfs (i_sysstatfs.U):
1953 This variable conditionally defines the I_SYSSTATFS symbol,
1954 and indicates whether a C program should include <sys/statfs.h>.
1955
781b178c
JH
1956i_sysstatvfs (i_sysstatvfs.U):
1957 This variable conditionally defines the I_SYSSTATVFS symbol,
1958 and indicates whether a C program should include <sys/statvfs.h>.
1959
1960i_systime (i_time.U):
1961 This variable conditionally defines I_SYS_TIME, which indicates
1962 to the C program that it should include <sys/time.h>.
1963
1964i_systimek (i_time.U):
1965 This variable conditionally defines I_SYS_TIME_KERNEL, which
1966 indicates to the C program that it should include <sys/time.h>
1967 with KERNEL defined.
1968
1969i_systimes (i_systimes.U):
1970 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1971 whether a C program should include <sys/times.h>.
1972
1973i_systypes (i_systypes.U):
1974 This variable conditionally defines the I_SYS_TYPES symbol,
1975 and indicates whether a C program should include <sys/types.h>.
1976
1977i_sysuio (i_sysuio.U):
1978 This variable conditionally defines the I_SYSUIO symbol, and indicates
1979 whether a C program should include <sys/uio.h>.
1980
1981i_sysun (i_sysun.U):
1982 This variable conditionally defines I_SYS_UN, which indicates
1983 to the C program that it should include <sys/un.h> to get UNIX
1984 domain socket definitions.
1985
0545a864
JH
1986i_sysvfs (i_sysvfs.U):
1987 This variable conditionally defines the I_SYSVFS symbol,
1988 and indicates whether a C program should include <sys/vfs.h>.
1989
781b178c
JH
1990i_syswait (i_syswait.U):
1991 This variable conditionally defines I_SYS_WAIT, which indicates
1992 to the C program that it should include <sys/wait.h>.
1993
1994i_termio (i_termio.U):
1995 This variable conditionally defines the I_TERMIO symbol, which
1996 indicates to the C program that it should include <termio.h> rather
1997 than <sgtty.h>.
1998
1999i_termios (i_termio.U):
2000 This variable conditionally defines the I_TERMIOS symbol, which
2001 indicates to the C program that the POSIX <termios.h> file is
2002 to be included.
2003
2004i_time (i_time.U):
2005 This variable conditionally defines I_TIME, which indicates
2006 to the C program that it should include <time.h>.
2007
2008i_unistd (i_unistd.U):
2009 This variable conditionally defines the I_UNISTD symbol, and indicates
2010 whether a C program should include <unistd.h>.
2011
0545a864
JH
2012i_ustat (i_ustat.U):
2013 This variable conditionally defines the I_USTAT symbol, and indicates
2014 whether a C program should include <ustat.h>.
2015
781b178c
JH
2016i_utime (i_utime.U):
2017 This variable conditionally defines the I_UTIME symbol, and indicates
2018 whether a C program should include <utime.h>.
2019
2020i_values (i_values.U):
2021 This variable conditionally defines the I_VALUES symbol, and indicates
2022 whether a C program may include <values.h> to get symbols like MAXLONG
2023 and friends.
2024
2025i_varargs (i_varhdr.U):
2026 This variable conditionally defines I_VARARGS, which indicates
2027 to the C program that it should include <varargs.h>.
2028
2029i_varhdr (i_varhdr.U):
2030 Contains the name of the header to be included to get va_dcl definition.
2031 Typically one of varargs.h or stdarg.h.
2032
2033i_vfork (i_vfork.U):
2034 This variable conditionally defines the I_VFORK symbol, and indicates
2035 whether a C program should include vfork.h.
2036
2037ignore_versioned_solibs (libs.U):
2038 This variable should be non-empty if non-versioned shared
2039 libraries (libfoo.so.x.y) are to be ignored (because they
2040 cannot be linked against).
2041
2042incpath (usrinc.U):
2043 This variable must preceed the normal include path to get hte
2044 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2045 Value can be "" or "/bsd43" on mips.
2046
2047inews (Loc.U):
2048 This variable is defined but not used by Configure.
2049 The value is a plain '' and is not useful.
2050
2051installarchlib (archlib.U):
2052 This variable is really the same as archlibexp but may differ on
2053 those systems using AFS. For extra portability, only this variable
2054 should be used in makefiles.
2055
2056installbin (bin.U):
2057 This variable is the same as binexp unless AFS is running in which case
2058 the user is explicitely prompted for it. This variable should always
2059 be used in your makefiles for maximum portability.
2060
2061installman1dir (man1dir.U):
2062 This variable is really the same as man1direxp, unless you are using
2063 AFS in which case it points to the read/write location whereas
2064 man1direxp only points to the read-only access location. For extra
2065 portability, you should only use this variable within your makefiles.
2066
2067installman3dir (man3dir.U):
2068 This variable is really the same as man3direxp, unless you are using
2069 AFS in which case it points to the read/write location whereas
2070 man3direxp only points to the read-only access location. For extra
2071 portability, you should only use this variable within your makefiles.
2072
2073installprefix (installprefix.U):
2074 This variable holds the name of the directory below which
2075 "make install" will install the package. For most users, this
2076 is the same as prefix. However, it is useful for
2077 installing the software into a different (usually temporary)
2078 location after which it can be bundled up and moved somehow
2079 to the final location specified by prefix.
2080
2081installprefixexp (installprefix.U):
2082 This variable holds the full absolute path of installprefix
2083 with all ~-expansion done.
2084
2085installprivlib (privlib.U):
2086 This variable is really the same as privlibexp but may differ on
2087 those systems using AFS. For extra portability, only this variable
2088 should be used in makefiles.
2089
2090installscript (scriptdir.U):
2091 This variable is usually the same as scriptdirexp, unless you are on
2092 a system running AFS, in which case they may differ slightly. You
2093 should always use this variable within your makefiles for portability.
2094
2095installsitearch (sitearch.U):
2096 This variable is really the same as sitearchexp but may differ on
2097 those systems using AFS. For extra portability, only this variable
2098 should be used in makefiles.
2099
0617aed7
JH
2100installsitebin (sitebin.U):
2101 This variable is usually the same as sitebinexp, unless you are on
2102 a system running AFS, in which case they may differ slightly. You
2103 should always use this variable within your makefiles for portability.
2104
781b178c
JH
2105installsitelib (sitelib.U):
2106 This variable is really the same as sitelibexp but may differ on
2107 those systems using AFS. For extra portability, only this variable
2108 should be used in makefiles.
2109
2110installstyle (installstyle.U):
2111 This variable describes the "style" of the perl installation.
2112 This is intended to be useful for tools that need to
2113 manipulate entire perl distributions. Perl itself doesn't use
2114 this to find its libraries -- the library directories are
2115 stored directly in Config.pm. Currently, there are only two
2116 styles: "lib" and "lib/perl5". The default library locations
2117 (e.g. privlib, sitelib) are either $prefix/lib or
2118 $prefix/lib/perl5. The former is useful if $prefix is a
2119 directory dedicated to perl (e.g. /opt/perl), while the latter
2120 is useful if $prefix is shared by many packages, e.g. if
2121 $prefix=/usr/local.
2122 This may later be extended to include other information, so
2123 be careful with pattern-matching on the results.
2124 For compatibility with perl5.005 and earlier, the default
2125 setting is based on whether or not $prefix contains the string
2126 "perl".
2127
2128installusrbinperl (instubperl.U):
2129 This variable tells whether Perl should be installed also as
2130 /usr/bin/perl in addition to
2131 $installbin/perl
2132
0617aed7
JH
2133installvendorbin (vendorbin.U):
2134 This variable is really the same as vendorbinexp but may differ on
2135 those systems using AFS. For extra portability, only this variable
2136 should be used in makefiles.
2137
a3635516
JH
2138installvendorlib (vendorlib.U):
2139 This variable is really the same as vendorlibexp but may differ on
2140 those systems using AFS. For extra portability, only this variable
2141 should be used in makefiles.
2142
781b178c
JH
2143intsize (intsize.U):
2144 This variable contains the value of the INTSIZE symbol, which
2145 indicates to the C program how many bytes there are in an int.
2146
2147known_extensions (Extensions.U):
2148 This variable holds a list of all XS extensions included in
2149 the package.
2150
2151ksh (Loc.U):
2152 This variable is defined but not used by Configure.
2153 The value is a plain '' and is not useful.
2154
2155large (models.U):
2156 This variable contains a flag which will tell the C compiler and loader
2157 to produce a program running with a large memory model. It is up to
2158 the Makefile to use this.
2159
2160ld (dlsrc.U):
2161 This variable indicates the program to be used to link
2162 libraries for dynamic loading. On some systems, it is 'ld'.
2163 On ELF systems, it should be $cc. Mostly, we'll try to respect
2164 the hint file setting.
2165
2166lddlflags (dlsrc.U):
2167 This variable contains any special flags that might need to be
2168 passed to $ld to create a shared library suitable for dynamic
2169 loading. It is up to the makefile to use it. For hpux, it
2170 should be '-b'. For sunos 4.1, it is empty.
2171
2172ldflags (ccflags.U):
2173 This variable contains any additional C loader flags desired by
2174 the user. It is up to the Makefile to use this.
2175
2176ldlibpthname (libperl.U):
2177 This variable holds the name of the shared library
2178 search path, often LD_LIBRARY_PATH. To get an empty
2179 string, the hints file must set this to 'none'.
2180
2181less (Loc.U):
5bf26616 2182 This variable is used internally by Configure to determine the
781b178c
JH
2183 full pathname (if any) of the less program. After Configure runs,
2184 the value is reset to a plain "less" and is not useful.
2185
2186lib_ext (Unix.U):
2187 This is an old synonym for _a.
2188
2189libc (libc.U):
2190 This variable contains the location of the C library.
2191
2192libperl (libperl.U):
2193 The perl executable is obtained by linking perlmain.c with
2194 libperl, any static extensions (usually just DynaLoader),
2195 and any other libraries needed on this system. libperl
2196 is usually libperl.a, but can also be libperl.so.xxx if
2197 the user wishes to build a perl executable with a shared
2198 library.
2199
2200libpth (libpth.U):
2201 This variable holds the general path (space-separated) used to find
2202 libraries. It is intended to be used by other units.
2203
2204libs (libs.U):
2205 This variable holds the additional libraries we want to use.
2206 It is up to the Makefile to deal with it.
2207
2208libswanted (Myinit.U):
2209 This variable holds a list of all the libraries we want to
2210 search. The order is chosen to pick up the c library
2211 ahead of ucb or bsd libraries for SVR4.
2212
2213line (Loc.U):
2214 This variable is defined but not used by Configure.
2215 The value is a plain '' and is not useful.
2216
2217lint (Loc.U):
2218 This variable is defined but not used by Configure.
2219 The value is a plain '' and is not useful.
2220
2221lkflags (ccflags.U):
2222 This variable contains any additional C partial linker flags desired by
2223 the user. It is up to the Makefile to use this.
2224
2225ln (Loc.U):
5bf26616 2226 This variable is used internally by Configure to determine the
781b178c
JH
2227 full pathname (if any) of the ln program. After Configure runs,
2228 the value is reset to a plain "ln" and is not useful.
2229
2230lns (lns.U):
2231 This variable holds the name of the command to make
2232 symbolic links (if they are supported). It can be used
2233 in the Makefile. It is either 'ln -s' or 'ln'
2234
2235locincpth (ccflags.U):
2236 This variable contains a list of additional directories to be
2237 searched by the compiler. The appropriate '-I' directives will
2238 be added to ccflags. This is intended to simplify setting
2239 local directories from the Configure command line.
2240 It's not much, but it parallels the loclibpth stuff in libpth.U.
2241
2242loclibpth (libpth.U):
2243 This variable holds the paths (space-separated) used to find local
2244 libraries. It is prepended to libpth, and is intended to be easily
2245 set from the command line.
2246
2247longdblsize (d_longdbl.U):
2248 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2249 indicates to the C program how many bytes there are in a long double,
2250 if this system supports long doubles.
2251
2252longlongsize (d_longlong.U):
2253 This variable contains the value of the LONGLONGSIZE symbol, which
2254 indicates to the C program how many bytes there are in a long long,
2255 if this system supports long long.
2256
2257longsize (intsize.U):
2258 This variable contains the value of the LONGSIZE symbol, which
2259 indicates to the C program how many bytes there are in a long.
2260
2261lp (Loc.U):
2262 This variable is defined but not used by Configure.
2263 The value is a plain '' and is not useful.
2264
2265lpr (Loc.U):
2266 This variable is defined but not used by Configure.
2267 The value is a plain '' and is not useful.
2268
2269ls (Loc.U):
5bf26616 2270 This variable is used internally by Configure to determine the
781b178c
JH
2271 full pathname (if any) of the ls program. After Configure runs,
2272 the value is reset to a plain "ls" and is not useful.
2273
2274lseeksize (lseektype.U):
2275 This variable defines lseektype to be something like off_t, long,
2276 or whatever type is used to declare lseek offset's type in the
2277 kernel (which also appears to be lseek's return type).
2278
2279lseektype (lseektype.U):
2280 This variable defines lseektype to be something like off_t, long,
2281 or whatever type is used to declare lseek offset's type in the
2282 kernel (which also appears to be lseek's return type).
2283
2284mail (Loc.U):
2285 This variable is defined but not used by Configure.
2286 The value is a plain '' and is not useful.
2287
2288mailx (Loc.U):
2289 This variable is defined but not used by Configure.
2290 The value is a plain '' and is not useful.
2291
2292make (Loc.U):
5bf26616 2293 This variable is used internally by Configure to determine the
781b178c
JH
2294 full pathname (if any) of the make program. After Configure runs,
2295 the value is reset to a plain "make" and is not useful.
2296
2297make_set_make (make.U):
2298 Some versions of 'make' set the variable MAKE. Others do not.
2299 This variable contains the string to be included in Makefile.SH
2300 so that MAKE is set if needed, and not if not needed.
2301 Possible values are:
2302 make_set_make='#' # If your make program handles this for you,
2303 make_set_make="MAKE=$make" # if it doesn't.
2304 I used a comment character so that we can distinguish a
2305 'set' value (from a previous config.sh or Configure '-D' option)
2306 from an uncomputed value.
2307
2308mallocobj (mallocsrc.U):
2309 This variable contains the name of the malloc.o that this package
2310 generates, if that malloc.o is preferred over the system malloc.
2311 Otherwise the value is null. This variable is intended for generating
2312 Makefiles. See mallocsrc.
2313
2314mallocsrc (mallocsrc.U):
2315 This variable contains the name of the malloc.c that comes with
2316 the package, if that malloc.c is preferred over the system malloc.
2317 Otherwise the value is null. This variable is intended for generating
2318 Makefiles.
2319
2320malloctype (mallocsrc.U):
2321 This variable contains the kind of ptr returned by malloc and realloc.
2322
2323man1dir (man1dir.U):
2324 This variable contains the name of the directory in which manual
2325 source pages are to be put. It is the responsibility of the
2326 Makefile.SH to get the value of this into the proper command.
2327 You must be prepared to do the ~name expansion yourself.
2328
2329man1direxp (man1dir.U):
2330 This variable is the same as the man1dir variable, but is filename
2331 expanded at configuration time, for convenient use in makefiles.
2332
2333man1ext (man1dir.U):
2334 This variable contains the extension that the manual page should
2335 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2336 See man1dir.
2337
2338man3dir (man3dir.U):
2339 This variable contains the name of the directory in which manual
2340 source pages are to be put. It is the responsibility of the
2341 Makefile.SH to get the value of this into the proper command.
2342 You must be prepared to do the ~name expansion yourself.
2343
2344man3direxp (man3dir.U):
2345 This variable is the same as the man3dir variable, but is filename
2346 expanded at configuration time, for convenient use in makefiles.
2347
2348man3ext (man3dir.U):
2349 This variable contains the extension that the manual page should
2350 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2351 See man3dir.
2352
2353Mcc (Loc.U):
5bf26616 2354 This variable is used internally by Configure to determine the
781b178c
JH
2355 full pathname (if any) of the Mcc program. After Configure runs,
2356 the value is reset to a plain "Mcc" and is not useful.
2357
2358medium (models.U):
2359 This variable contains a flag which will tell the C compiler and loader
2360 to produce a program running with a medium memory model. If the
2361 medium model is not supported, contains the flag to produce large
2362 model programs. It is up to the Makefile to use this.
2363
2364mips_type (usrinc.U):
2365 This variable holds the environment type for the mips system.
2366 Possible values are "BSD 4.3" and "System V".
2367
2368mkdir (Loc.U):
5bf26616 2369 This variable is used internally by Configure to determine the
781b178c
JH
2370 full pathname (if any) of the mkdir program. After Configure runs,
2371 the value is reset to a plain "mkdir" and is not useful.
2372
781b178c
JH
2373models (models.U):
2374 This variable contains the list of memory models supported by this
2375 system. Possible component values are none, split, unsplit, small,
2376 medium, large, and huge. The component values are space separated.
2377
2378modetype (modetype.U):
2379 This variable defines modetype to be something like mode_t,
2380 int, unsigned short, or whatever type is used to declare file
2381 modes for system calls.
2382
2383more (Loc.U):
5bf26616 2384 This variable is used internally by Configure to determine the
781b178c
JH
2385 full pathname (if any) of the more program. After Configure runs,
2386 the value is reset to a plain "more" and is not useful.
2387
2388multiarch (multiarch.U):
2389 This variable conditionally defines the MULTIARCH symbol
2390 which signifies the presence of multiplatform files.
2391 This is normally set by hints files.
2392
2393mv (Loc.U):
2394 This variable is defined but not used by Configure.
2395 The value is a plain '' and is not useful.
2396
2397myarchname (archname.U):
2398 This variable holds the architecture name computed by Configure in
2399 a previous run. It is not intended to be perused by any user and
2400 should never be set in a hint file.
2401
2402mydomain (myhostname.U):
2403 This variable contains the eventual value of the MYDOMAIN symbol,
2404 which is the domain of the host the program is going to run on.
2405 The domain must be appended to myhostname to form a complete host name.
2406 The dot comes with mydomain, and need not be supplied by the program.
2407
2408myhostname (myhostname.U):
2409 This variable contains the eventual value of the MYHOSTNAME symbol,
2410 which is the name of the host the program is going to run on.
2411 The domain is not kept with hostname, but must be gotten from mydomain.
2412 The dot comes with mydomain, and need not be supplied by the program.
2413
2414myuname (Oldconfig.U):
2415 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2416 pseudo variables assignments in the output are stripped, thank you. The
2417 whole thing is then lower-cased.
2418
2419n (n.U):
2420 This variable contains the '-n' flag if that is what causes the echo
2421 command to suppress newline. Otherwise it is null. Correct usage is
2422 $echo $n "prompt for a question: $c".
2423
2424netdb_hlen_type (netdbtype.U):
2425 This variable holds the type used for the 2nd argument to
2426 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2427 This is only useful if you have gethostbyaddr(), naturally.
2428
2429netdb_host_type (netdbtype.U):
2430 This variable holds the type used for the 1st argument to
2431 gethostbyaddr(). Usually, this is char * or void *, possibly
2432 with or without a const prefix.
2433 This is only useful if you have gethostbyaddr(), naturally.
2434
2435netdb_name_type (netdbtype.U):
2436 This variable holds the type used for the argument to
2437 gethostbyname(). Usually, this is char * or const char *.
2438 This is only useful if you have gethostbyname(), naturally.
2439
2440netdb_net_type (netdbtype.U):
2441 This variable holds the type used for the 1st argument to
2442 getnetbyaddr(). Usually, this is int or long.
2443 This is only useful if you have getnetbyaddr(), naturally.
2444
2445nm (Loc.U):
5bf26616 2446 This variable is used internally by Configure to determine the
781b178c
JH
2447 full pathname (if any) of the nm program. After Configure runs,
2448 the value is reset to a plain "nm" and is not useful.
2449
2450nm_opt (usenm.U):
2451 This variable holds the options that may be necessary for nm.
2452
2453nm_so_opt (usenm.U):
2454 This variable holds the options that may be necessary for nm
2455 to work on a shared library but that can not be used on an
2456 archive library. Currently, this is only used by Linux, where
2457 nm --dynamic is *required* to get symbols from an ELF library which
2458 has been stripped, but nm --dynamic is *fatal* on an archive library.
2459 Maybe Linux should just always set usenm=false.
2460
2461nonxs_ext (Extensions.U):
2462 This variable holds a list of all non-xs extensions included
2463 in the package. All of them will be built.
2464
2465nroff (Loc.U):
5bf26616 2466 This variable is used internally by Configure to determine the
781b178c
JH
2467 full pathname (if any) of the nroff program. After Configure runs,
2468 the value is reset to a plain "nroff" and is not useful.
2469
2470o_nonblock (nblock_io.U):
2471 This variable bears the symbol value to be used during open() or fcntl()
2472 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2473 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2474 but that is only supported by some devices.
2475
2476obj_ext (Unix.U):
2477 This is an old synonym for _o.
2478
2479old_pthread_create_joinable (d_pthrattrj.U):
2480 This variable defines the constant to use for creating joinable
2481 (aka undetached) pthreads. Unused if pthread.h defines
2482 PTHREAD_CREATE_JOINABLE. If used, possible values are
2483 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2484
2485optimize (ccflags.U):
2486 This variable contains any optimizer/debugger flag that should be used.
2487 It is up to the Makefile to use it.
2488
2489orderlib (orderlib.U):
2490 This variable is "true" if the components of libraries must be ordered
2491 (with `lorder $* | tsort`) before placing them in an archive. Set to
2492 "false" if ranlib or ar can generate random libraries.
2493
2494osname (Oldconfig.U):
2495 This variable contains the operating system name (e.g. sunos,
2496 solaris, hpux, etc.). It can be useful later on for setting
2497 defaults. Any spaces are replaced with underscores. It is set
2498 to a null string if we can't figure it out.
2499
2500osvers (Oldconfig.U):
2501 This variable contains the operating system version (e.g.
2502 4.1.3, 5.2, etc.). It is primarily used for helping select
2503 an appropriate hints file, but might be useful elsewhere for
2504 setting defaults. It is set to '' if we can't figure it out.
2505 We try to be flexible about how much of the version number
2506 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2507 same for this package, hints files might just be os_4.0 or
2508 os_4.1, etc., not keeping separate files for each little release.
2509
2510package (package.U):
2511 This variable contains the name of the package being constructed.
2512 It is primarily intended for the use of later Configure units.
2513
2514pager (pager.U):
2515 This variable contains the name of the preferred pager on the system.
2516 Usual values are (the full pathnames of) more, less, pg, or cat.
2517
2518passcat (nis.U):
2519 This variable contains a command that produces the text of the
2520 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2521 "ypcat passwd" when NIS is used.
2522
2523patchlevel (patchlevel.U):
2524 The patchlevel level of this package.
2525 The value of patchlevel comes from the patchlevel.h file.
2526
2527path_sep (Unix.U):
2528 This is an old synonym for p_ in Head.U, the character
2529 used to separate elements in the command shell search PATH.
2530
2531perl (Loc.U):
2532 This variable is defined but not used by Configure.
2533 The value is a plain '' and is not useful.
2534
10a67519
JH
2535PERL_APIVERSION (Oldsyms.U):
2536 This value is manually set in patchlevel.h and is used
2537 to set the Configure apiversion variable.
2538
2539PERL_REVISION (Oldsyms.U):
2540 In a Perl version number such as 5.6.2, this is the 5.
2541 This value is manually set in patchlevel.h
2542
2543PERL_SUBVERSION (Oldsyms.U):
2544 In a Perl version number such as 5.6.2, this is the 2.
2545 Values greater than 50 represent potentially unstable
2546 development subversions.
2547 This value is manually set in patchlevel.h
2548
2549PERL_VERSION (Oldsyms.U):
2550 In a Perl version number such as 5.6.2, this is the 6.
2551 This value is manually set in patchlevel.h
2552
781b178c
JH
2553perladmin (perladmin.U):
2554 Electronic mail address of the perl5 administrator.
2555
2556perlpath (perlpath.U):
2557 This variable contains the eventual value of the PERLPATH symbol,
2558 which contains the name of the perl interpreter to be used in
2559 shell scripts and in the "eval 'exec'" idiom.
2560
2561pg (Loc.U):
5bf26616 2562 This variable is used internally by Configure to determine the
781b178c
JH
2563 full pathname (if any) of the pg program. After Configure runs,
2564 the value is reset to a plain "pg" and is not useful.
2565
2566phostname (myhostname.U):
2567 This variable contains the eventual value of the PHOSTNAME symbol,
2568 which is a command that can be fed to popen() to get the host name.
2569 The program should probably not presume that the domain is or isn't
2570 there already.
2571
2572pidtype (pidtype.U):
2573 This variable defines PIDTYPE to be something like pid_t, int,
2574 ushort, or whatever type is used to declare process ids in the kernel.
2575
2576plibpth (libpth.U):
2577 Holds the private path used by Configure to find out the libraries.
2578 Its value is prepend to libpth. This variable takes care of special
2579 machines, like the mips. Usually, it should be empty.
2580
75347591
JH
2581pm_apiversion (xs_apiversion.U):
2582 This variable contains the version of the oldest perl
2583 compatible with the present perl. (That is, pure perl modules
2584 written for $pm_apiversion will still work for the current
2585 version). perl.c:incpush() and lib/lib.pm will automatically
2586 search in $sitelib for older directories across major versions
2587 back to pm_apiversion. This is only useful if you have a perl
2588 library directory tree structured like the default one. The
2589 versioned site_perl library was introduced in 5.005, so that's
2590 the default setting for this variable. It's hard to imagine
2591 it changing before Perl6. It is included here for symmetry
2592 with xs_apiveprsion -- the searching algorithms will
2593 (presumably) be similar.
2594 See the INSTALL file for how this works.
2595
781b178c
JH
2596pmake (Loc.U):
2597 This variable is defined but not used by Configure.
2598 The value is a plain '' and is not useful.
2599
2600pr (Loc.U):
2601 This variable is defined but not used by Configure.
2602 The value is a plain '' and is not useful.
2603
2604prefix (prefix.U):
2605 This variable holds the name of the directory below which the
2606 user will install the package. Usually, this is /usr/local, and
2607 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2608 man pages in /usr/local/man, etc. It is only used to set defaults
2609 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2610
2611prefixexp (prefix.U):
2612 This variable holds the full absolute path of the directory below
2613 which the user will install the package. Derived from prefix.
2614
2615privlib (privlib.U):
2616 This variable contains the eventual value of the PRIVLIB symbol,
2617 which is the name of the private library for this package. It may
2618 have a ~ on the front. It is up to the makefile to eventually create
2619 this directory while performing installation (with ~ substitution).
2620
2621privlibexp (privlib.U):
2622 This variable is the ~name expanded version of privlib, so that you
2623 may use it directly in Makefiles or shell scripts.
2624
2625prototype (prototype.U):
2626 This variable holds the eventual value of CAN_PROTOTYPE, which
2627 indicates the C compiler can handle funciton prototypes.
2628
2629ptrsize (ptrsize.U):
2630 This variable contains the value of the PTRSIZE symbol, which
2631 indicates to the C program how many bytes there are in a pointer.
2632
2633randbits (randfunc.U):
2634 Indicates how many bits are produced by the function used to
2635 generate normalized random numbers.
2636
2637randfunc (randfunc.U):
2638 Indicates the name of the random number function to use.
2639 Values include drand48, random, and rand. In C programs,
2640 the 'Drand01' macro is defined to generate uniformly distributed
2641 random numbers over the range [0., 1.[ (see drand01 and nrand).
2642
2643randseedtype (randfunc.U):
2644 Indicates the type of the argument of the seedfunc.
2645
2646ranlib (orderlib.U):
2647 This variable is set to the pathname of the ranlib program, if it is
2648 needed to generate random libraries. Set to ":" if ar can generate
2649 random libraries or if random libraries are not supported
2650
2651rd_nodata (nblock_io.U):
2652 This variable holds the return code from read() when no data is
2653 present. It should be -1, but some systems return 0 when O_NDELAY is
2654 used, which is a shame because you cannot make the difference between
2655 no data and an EOF.. Sigh!
2656
2657rm (Loc.U):
5bf26616 2658 This variable is used internally by Configure to determine the
781b178c
JH
2659 full pathname (if any) of the rm program. After Configure runs,
2660 the value is reset to a plain "rm" and is not useful.
2661
2662rmail (Loc.U):
2663 This variable is defined but not used by Configure.
2664 The value is a plain '' and is not useful.
2665
2666runnm (usenm.U):
2667 This variable contains 'true' or 'false' depending whether the
2668 nm extraction should be performed or not, according to the value
2669 of usenm and the flags on the Configure command line.
2670
2671sched_yield (d_pthread_y.U):
2672 This variable defines the way to yield the execution
2673 of the current thread.
2674
2675scriptdir (scriptdir.U):
2676 This variable holds the name of the directory in which the user wants
2677 to put publicly scripts for the package in question. It is either
2678 the same directory as for binaries, or a special one that can be
2679 mounted across different architectures, like /usr/share. Programs
2680 must be prepared to deal with ~name expansion.
2681
2682scriptdirexp (scriptdir.U):
2683 This variable is the same as scriptdir, but is filename expanded
2684 at configuration time, for programs not wanting to bother with it.
2685
2686sed (Loc.U):
5bf26616 2687 This variable is used internally by Configure to determine the
781b178c
JH
2688 full pathname (if any) of the sed program. After Configure runs,
2689 the value is reset to a plain "sed" and is not useful.
2690
2691seedfunc (randfunc.U):
2692 Indicates the random number generating seed function.
2693 Values include srand48, srandom, and srand.
2694
2695selectminbits (selectminbits.U):
2696 This variable holds the minimum number of bits operated by select.
2697 That is, if you do select(n, ...), how many bits at least will be
2698 cleared in the masks if some activity is detected. Usually this
2699 is either n or 32*ceil(n/32), especially many little-endians do
2700 the latter. This is only useful if you have select(), naturally.
2701
2702selecttype (selecttype.U):
2703 This variable holds the type used for the 2nd, 3rd, and 4th
2704 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2705 is defined, and 'int *' otherwise. This is only useful if you
2706 have select(), naturally.
2707
2708sendmail (Loc.U):
2709 This variable is defined but not used by Configure.
2710 The value is a plain '' and is not useful.
2711
2712sh (sh.U):
2713 This variable contains the full pathname of the shell used
2714 on this system to execute Bourne shell scripts. Usually, this will be
2715 /bin/sh, though it's possible that some systems will have /bin/ksh,
2716 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2717 D:/bin/sh.exe.
2718 This unit comes before Options.U, so you can't set sh with a '-D'
2719 option, though you can override this (and startsh)
2720 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2721
2722shar (Loc.U):
2723 This variable is defined but not used by Configure.
2724 The value is a plain '' and is not useful.
2725
2726sharpbang (spitshell.U):
2727 This variable contains the string #! if this system supports that
2728 construct.
2729
2730shmattype (d_shmat.U):
2731 This symbol contains the type of pointer returned by shmat().
2732 It can be 'void *' or 'char *'.
2733
2734shortsize (intsize.U):
2735 This variable contains the value of the SHORTSIZE symbol which
2736 indicates to the C program how many bytes there are in a short.
2737
2738shrpenv (libperl.U):
2739 If the user builds a shared libperl.so, then we need to tell the
2740 'perl' executable where it will be able to find the installed libperl.so.
2741 One way to do this on some systems is to set the environment variable
2742 LD_RUN_PATH to the directory that will be the final location of the
2743 shared libperl.so. The makefile can use this with something like
2744 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2745 Typical values are
2746 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2747 or
2748 shrpenv=''
2749 See the main perl Makefile.SH for actual working usage.
2750 Alternatively, we might be able to use a command line option such
2751 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2752 $archlibexp/CORE (Linux).
2753
2754shsharp (spitshell.U):
2755 This variable tells further Configure units whether your sh can
2756 handle # comments.
2757
2758sig_count (sig_name.U):
2759 This variable holds a number larger than the largest valid
2760 signal number. This is usually the same as the NSIG macro.
2761
2762sig_name (sig_name.U):
2763 This variable holds the signal names, space separated. The leading
2764 SIG in signal name is removed. A ZERO is prepended to the
2765 list. This is currently not used.
2766
2767sig_name_init (sig_name.U):
2768 This variable holds the signal names, enclosed in double quotes and
2769 separated by commas, suitable for use in the SIG_NAME definition
2770 below. A "ZERO" is prepended to the list, and the list is
2771 terminated with a plain 0. The leading SIG in signal names
2772 is removed. See sig_num.
2773
2774sig_num (sig_name.U):
2775 This variable holds the signal numbers, space separated. A ZERO is
2776 prepended to the list (corresponding to the fake SIGZERO), and
2777 the list is terminated with a 0. Those numbers correspond to
2778 the value of the signal listed in the same place within the
2779 sig_name list.
2780
2781sig_num_init (sig_name.U):
2782 This variable holds the signal numbers, enclosed in double quotes and
2783 separated by commas, suitable for use in the SIG_NUM definition
2784 below. A "ZERO" is prepended to the list, and the list is
2785 terminated with a plain 0.
2786
2787signal_t (d_voidsig.U):
2788 This variable holds the type of the signal handler (void or int).
2789
2790sitearch (sitearch.U):
2791 This variable contains the eventual value of the SITEARCH symbol,
2792 which is the name of the private library for this package. It may
2793 have a ~ on the front. It is up to the makefile to eventually create
2794 this directory while performing installation (with ~ substitution).
2795
2796sitearchexp (sitearch.U):
2797 This variable is the ~name expanded version of sitearch, so that you
2798 may use it directly in Makefiles or shell scripts.
2799
0617aed7
JH
2800sitebin (sitebin.U):
2801 This variable holds the name of the directory in which the user wants
2802 to put add-on publicly executable files for the package in question. It
2803 is most often a local directory such as /usr/local/bin. Programs using
2804 this variable must be prepared to deal with ~name substitution.
2805
2806sitebinexp (sitebin.U):
2807 This is the same as the sitebin variable, but is filename expanded at
2808 configuration time, for use in your makefiles.
2809
781b178c
JH
2810sitelib (sitelib.U):
2811 This variable contains the eventual value of the SITELIB symbol,
2812 which is the name of the private library for this package. It may
2813 have a ~ on the front. It is up to the makefile to eventually create
2814 this directory while performing installation (with ~ substitution).
2815
2816sitelibexp (sitelib.U):
2817 This variable is the ~name expanded version of sitelib, so that you
2818 may use it directly in Makefiles or shell scripts.
2819
2820siteprefix (siteprefix.U):
2821 This variable holds the full absolute path of the directory below
2822 which the user will install add-on packages.
2823
2824siteprefixexp (siteprefix.U):
2825 This variable holds the full absolute path of the directory below
2826 which the user will install add-on packages. Derived from siteprefix.
2827
2828sizetype (sizetype.U):
2829 This variable defines sizetype to be something like size_t,
2830 unsigned long, or whatever type is used to declare length
2831 parameters for string functions.
2832
2833sleep (Loc.U):
2834 This variable is defined but not used by Configure.
2835 The value is a plain '' and is not useful.
2836
2837smail (Loc.U):
2838 This variable is defined but not used by Configure.
2839 The value is a plain '' and is not useful.
2840
2841small (models.U):
2842 This variable contains a flag which will tell the C compiler and loader
2843 to produce a program running with a small memory model. It is up to
2844 the Makefile to use this.
2845
2846so (so.U):
2847 This variable holds the extension used to identify shared libraries
2848 (also known as shared objects) on the system. Usually set to 'so'.
2849
2850sockethdr (d_socket.U):
2851 This variable has any cpp '-I' flags needed for socket support.
2852
2853socketlib (d_socket.U):
2854 This variable has the names of any libraries needed for socket support.
2855
2856sort (Loc.U):
5bf26616 2857 This variable is used internally by Configure to determine the
781b178c
JH
2858 full pathname (if any) of the sort program. After Configure runs,
2859 the value is reset to a plain "sort" and is not useful.
2860
2861spackage (package.U):
2862 This variable contains the name of the package being constructed,
2863 with the first letter uppercased, i.e. suitable for starting
2864 sentences.
2865
2866spitshell (spitshell.U):
2867 This variable contains the command necessary to spit out a runnable
2868 shell on this system. It is either cat or a grep '-v' for # comments.
2869
2870split (models.U):
2871 This variable contains a flag which will tell the C compiler and loader
2872 to produce a program that will run in separate I and D space, for those
2873 machines that support separation of instruction and data space. It is
2874 up to the Makefile to use this.
2875
11dc3f68
JH
2876sPRId64 (quadfio.U):
2877 This variable, if defined, contains the string used by stdio to
2878 format 64-bit decimal numbers (format 'd') for output.
2879
2880sPRIeldbl (longdblfio.U):
2881 This variable, if defined, contains the string used by stdio to
2882 format long doubles (format 'e') for output.
2883
2884sPRIEldbl (longdblfio.U):
2885 This variable, if defined, contains the string used by stdio to
2886 format long doubles (format 'E') for output.
2887
2888sPRIfldbl (longdblfio.U):
2889 This variable, if defined, contains the string used by stdio to
2890 format long doubles (format 'f') for output.
2891
2892sPRIFldbl (longdblfio.U):
2893 This variable, if defined, contains the string used by stdio to
2894 format long doubles (format 'F') for output.
2895
2896sPRIgldbl (longdblfio.U):
2897 This variable, if defined, contains the string used by stdio to
2898 format long doubles (format 'g') for output.
2899
2900sPRIGldbl (longdblfio.U):
2901 This variable, if defined, contains the string used by stdio to
2902 format long doubles (format 'G') for output.
2903
2904sPRIi64 (quadfio.U):
2905 This variable, if defined, contains the string used by stdio to
2906 format 64-bit decimal numbers (format 'i') for output.
2907
2908sPRIo64 (quadfio.U):
2909 This variable, if defined, contains the string used by stdio to
2910 format 64-bit octal numbers (format 'o') for output.
2911
2912sPRIu64 (quadfio.U):
2913 This variable, if defined, contains the string used by stdio to
2914 format 64-bit unsigned decimal numbers (format 'u') for output.
2915
2916sPRIx64 (quadfio.U):
2917 This variable, if defined, contains the string used by stdio to
2918 format 64-bit hexadecimal numbers (format 'x') for output.
2919
2920sPRIX64 (quadfio.U):
2921 This variable, if defined, contains the string used by stdio to
2922 format 64-bit hExADECimAl numbers (format 'X') for output.
2923
781b178c
JH
2924src (src.U):
2925 This variable holds the path to the package source. It is up to
2926 the Makefile to use this variable and set VPATH accordingly to
2927 find the sources remotely.
2928
2929ssizetype (ssizetype.U):
2930 This variable defines ssizetype to be something like ssize_t,
2931 long or int. It is used by functions that return a count
2932 of bytes or an error condition. It must be a signed type.
2933 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2934
2935startperl (startperl.U):
2936 This variable contains the string to put on the front of a perl
2937 script to make sure (hopefully) that it runs with perl and not some
2938 shell. Of course, that leading line must be followed by the classical
2939 perl idiom:
2940 eval 'exec perl -S $0 ${1+"$@"}'
2941 if $running_under_some_shell;
2942 to guarantee perl startup should the shell execute the script. Note
2943 that this magic incatation is not understood by csh.
2944
2945startsh (startsh.U):
2946 This variable contains the string to put on the front of a shell
2947 script to make sure (hopefully) that it runs with sh and not some
2948 other shell.
2949
2950static_ext (Extensions.U):
2951 This variable holds a list of XS extension files we want to
2952 link statically into the package. It is used by Makefile.
2953
2954stdchar (stdchar.U):
2955 This variable conditionally defines STDCHAR to be the type of char
2956 used in stdio.h. It has the values "unsigned char" or "char".
2957
2958stdio_base (d_stdstdio.U):
2959 This variable defines how, given a FILE pointer, fp, to access the
2960 _base field (or equivalent) of stdio.h's FILE structure. This will
2961 be used to define the macro FILE_base(fp).
2962
2963stdio_bufsiz (d_stdstdio.U):
2964 This variable defines how, given a FILE pointer, fp, to determine
2965 the number of bytes store in the I/O buffer pointer to by the
2966 _base field (or equivalent) of stdio.h's FILE structure. This will
2967 be used to define the macro FILE_bufsiz(fp).
2968
2969stdio_cnt (d_stdstdio.U):
2970 This variable defines how, given a FILE pointer, fp, to access the
2971 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2972 be used to define the macro FILE_cnt(fp).
2973
2974stdio_filbuf (d_stdstdio.U):
2975 This variable defines how, given a FILE pointer, fp, to tell
2976 stdio to refill it's internal buffers (?). This will
2977 be used to define the macro FILE_filbuf(fp).
2978
2979stdio_ptr (d_stdstdio.U):
2980 This variable defines how, given a FILE pointer, fp, to access the
2981 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2982 be used to define the macro FILE_ptr(fp).
2983
2984stdio_stream_array (stdio_streams.U):
2985 This variable tells the name of the array holding the stdio streams.
2986 Usual values include _iob, __iob, and __sF.
2987
2988strings (i_string.U):
2989 This variable holds the full path of the string header that will be
2990 used. Typically /usr/include/string.h or /usr/include/strings.h.
2991
2992submit (Loc.U):
2993 This variable is defined but not used by Configure.
2994 The value is a plain '' and is not useful.
2995
2996subversion (patchlevel.U):
2997 The subversion level of this package.
2998 The value of subversion comes from the patchlevel.h file.
2999 This is unique to perl.
3000
3001sysman (sysman.U):
3002 This variable holds the place where the manual is located on this
3003 system. It is not the place where the user wants to put his manual
3004 pages. Rather it is the place where Configure may look to find manual
3005 for unix commands (section 1 of the manual usually). See mansrc.
3006
3007tail (Loc.U):
3008 This variable is defined but not used by Configure.
3009 The value is a plain '' and is not useful.
3010
3011tar (Loc.U):
3012 This variable is defined but not used by Configure.
3013 The value is a plain '' and is not useful.
3014
3015tbl (Loc.U):
3016 This variable is defined but not used by Configure.
3017 The value is a plain '' and is not useful.
3018
3019tee (Loc.U):
3020 This variable is defined but not used by Configure.
3021 The value is a plain '' and is not useful.
3022
3023test (Loc.U):
5bf26616 3024 This variable is used internally by Configure to determine the
781b178c
JH
3025 full pathname (if any) of the test program. After Configure runs,
3026 the value is reset to a plain "test" and is not useful.
3027
3028timeincl (i_time.U):
3029 This variable holds the full path of the included time header(s).
3030
3031timetype (d_time.U):
3032 This variable holds the type returned by time(). It can be long,
3033 or time_t on BSD sites (in which case <sys/types.h> should be
3034 included). Anyway, the type Time_t should be used.
3035
3036touch (Loc.U):
5bf26616 3037 This variable is used internally by Configure to determine the
781b178c
JH
3038 full pathname (if any) of the touch program. After Configure runs,
3039 the value is reset to a plain "touch" and is not useful.
3040
3041tr (Loc.U):
5bf26616 3042 This variable is used internally by Configure to determine the
781b178c
JH
3043 full pathname (if any) of the tr program. After Configure runs,
3044 the value is reset to a plain "tr" and is not useful.
3045
3046trnl (trnl.U):
3047 This variable contains the value to be passed to the tr(1)
3048 command to transliterate a newline. Typical values are
3049 '\012' and '\n'. This is needed for EBCDIC systems where
3050 newline is not necessarily '\012'.
3051
3052troff (Loc.U):
3053 This variable is defined but not used by Configure.
3054 The value is a plain '' and is not useful.
3055
2d228ff3
JH
3056uidsign (uidsign.U):
3057 This variable contains the signedness of a uidtype.
3058 1 for unsigned, -1 for signed.
3059
785fb66b
JH
3060uidsize (uidsize.U):
3061 This variable contains the size of a uidtype in bytes.
3062
781b178c
JH
3063uidtype (uidtype.U):
3064 This variable defines Uid_t to be something like uid_t, int,
3065 ushort, or whatever type is used to declare user ids in the kernel.
3066
3067uname (Loc.U):
5bf26616 3068 This variable is used internally by Configure to determine the
781b178c
JH
3069 full pathname (if any) of the uname program. After Configure runs,
3070 the value is reset to a plain "uname" and is not useful.
3071
3072uniq (Loc.U):
5bf26616 3073 This variable is used internally by Configure to determine the
781b178c
JH
3074 full pathname (if any) of the uniq program. After Configure runs,
3075 the value is reset to a plain "uniq" and is not useful.
3076
3077use64bits (use64bits.U):
3078 This variable conditionally defines the USE_64_BITS symbol,
3079 and indicates that explicit 64-bit interfaces should be used
3080 when available.
3081
3082usedl (dlsrc.U):
3083 This variable indicates if the the system supports dynamic
3084 loading of some sort. See also dlsrc and dlobj.
3085
5bf26616 3086uselargefiles (uselfs.U):
1baac590
JH
3087 This variable conditionally defines the USE_LARGE_FILES symbol,
3088 and indicates that large file interfaces should be used when
3089 available. The use64bits symbol will also be turned on if necessary.
3090
ca24dfc6
LV
3091uselongdouble (uselongdbl.U):
3092 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3093 and indicates that long doubles should be used when available.
3094
1baac590
JH
3095usemorebits (usemorebits.U):
3096 This variable conditionally defines the USE_MORE_BITS symbol,
3097 and indicates that explicit 64-bit interfaces and long doubles
3098 should be used when available.
3099
781b178c
JH
3100usemultiplicity (usemultiplicity.U):
3101 This variable conditionally defines the MULTIPLICITY symbol,
3102 and indicates that Perl should be built to use multiplicity.
3103
3104usemymalloc (mallocsrc.U):
3105 This variable contains y if the malloc that comes with this package
3106 is desired over the system's version of malloc. People often include
3107 special versions of malloc for effiency, but such versions are often
3108 less portable. See also mallocsrc and mallocobj.
3109 If this is 'y', then -lmalloc is removed from $libs.
3110
3111usenm (usenm.U):
3112 This variable contains 'true' or 'false' depending whether the
3113 nm extraction is wanted or not.
3114
3115useopcode (Extensions.U):
3116 This variable holds either 'true' or 'false' to indicate
3117 whether the Opcode extension should be used. The sole
3118 use for this currently is to allow an easy mechanism
3119 for users to skip the Opcode extension from the Configure
3120 command line.
3121
3122useperlio (useperlio.U):
3123 This variable conditionally defines the USE_PERLIO symbol,
3124 and indicates that the PerlIO abstraction should be
3125 used throughout.
3126
3127useposix (Extensions.U):
3128 This variable holds either 'true' or 'false' to indicate
3129 whether the POSIX extension should be used. The sole
3130 use for this currently is to allow an easy mechanism
3131 for hints files to indicate that POSIX will not compile
3132 on a particular system.
3133
3134usesfio (d_sfio.U):
3135 This variable is set to true when the user agrees to use sfio.
3136 It is set to false when sfio is not available or when the user
3137 explicitely requests not to use sfio. It is here primarily so
3138 that command-line settings can override the auto-detection of
3139 d_sfio without running into a "WHOA THERE".
3140
3141useshrplib (libperl.U):
3142 This variable is set to 'yes' if the user wishes
3143 to build a shared libperl, and 'no' otherwise.
3144
3145usesocks (usesocks.U):
3146 This variable conditionally defines the USE_SOCKS symbol,
3147 and indicates that Perl should be built to use SOCKS.
3148
3149usethreads (usethreads.U):
3150 This variable conditionally defines the USE_THREADS symbol,
3151 and indicates that Perl should be built to use threads.
3152
9f50e519
NA
3153usevendorprefix (vendorprefix.U):
3154 This variable tells whether the vendorprefix
3155 and consequently other vendor* paths are in use.
3156
781b178c
JH
3157usevfork (d_vfork.U):
3158 This variable is set to true when the user accepts to use vfork.
3159 It is set to false when no vfork is available or when the user
3160 explicitely requests not to use vfork.
3161
3162usrinc (usrinc.U):
3163 This variable holds the path of the include files, which is
3164 usually /usr/include. It is mainly used by other Configure units.
3165
3166uuname (Loc.U):
3167 This variable is defined but not used by Configure.
3168 The value is a plain '' and is not useful.
3169
0617aed7
JH
3170vendorbin (vendorbin.U):
3171 This variable contains the eventual value of the VENDORBIN symbol,
3172 which is the name of the private directory for exuctables for this package.
3173 It may have a ~ on the front. It is up to the makefile to eventually create
3174 this directory while performing installation (with ~ substitution).
3175 Vendors who distribute perl binaries may place their own
3176 extensions and modules in this directory.
3177
3178vendorbinexp (vendorbin.U):
3179 This variable is the ~name expanded version of vendorbin, so that you
3180 may use it directly in Makefiles or shell scripts.
3181
a3635516
JH
3182vendorlib (vendorlib.U):
3183 This variable contains the eventual value of the VENDORLIB symbol,
3184 which is the name of the private library for this package. It may
3185 have a ~ on the front. It is up to the makefile to eventually create
3186 this directory while performing installation (with ~ substitution).
3187 Vendors who distribute perl binaries may place their own
3188 extensions and modules in this directory.
3189
3190vendorlibexp (vendorlib.U):
3191 This variable is the ~name expanded version of vendorlib, so that you
3192 may use it directly in Makefiles or shell scripts.
3193
3194vendorprefix (vendorprefix.U):
3195 This variable holds the full absolute path of the directory below
3196 which the vendor will install add-on packages.
3197
3198vendorprefixexp (vendorprefix.U):
3199 This variable holds the full absolute path of the directory below
3200 which the vendor will install add-on packages. Derived from vendorprefix.
3201
781b178c
JH
3202version (patchlevel.U):
3203 The full version number of this package. This combines
3204 baserev, patchlevel, and subversion to get the full
3205 version number, including any possible subversions. Care
3206 is taken to use the C locale in order to get something
3207 like 5.004 instead of 5,004. This is unique to perl.
3208
3209vi (Loc.U):
3210 This variable is defined but not used by Configure.
3211 The value is a plain '' and is not useful.
3212
3213voidflags (voidflags.U):
3214 This variable contains the eventual value of the VOIDFLAGS symbol,
3215 which indicates how much support of the void type is given by this
3216 compiler. See VOIDFLAGS for more info.
3217
3218xlibpth (libpth.U):
3219 This variable holds extra path (space-separated) used to find
3220 libraries on this platform, for example CPU-specific libraries
3221 (on multi-CPU platforms) may be listed here.
3222
75347591
JH
3223xs_apiversion (xs_apiversion.U):
3224 This variable contains the version of the oldest perl binary
3225 compatible with the present perl. perl.c:incpush() and
3226 lib/lib.pm will automatically search in $sitearch for older
3227 directories across major versions back to xs_apiversion.
3228 This is only useful if you have a perl library directory tree
3229 structured like the default one.
3230 See INSTALL for how this works.
3231 The versioned site_perl directory was introduced in 5.005,
3232 so that is the lowest possible value.
3233 Since this can depend on compile time options (such as
3234 bincompat) it is set by Configure. Other non-default sources
3235 of potential incompatibility, such as multiplicity, threads,
3236 debugging, 64bits, sfio, etc., are not checked for currently,
3237 though in principle we could go snooping around in old
3238 Config.pm files.
3239
781b178c
JH
3240zcat (Loc.U):
3241 This variable is defined but not used by Configure.
3242 The value is a plain '' and is not useful.
3243
3244zip (Loc.U):
5bf26616 3245 This variable is used internally by Configure to determine the
781b178c
JH
3246 full pathname (if any) of the zip program. After Configure runs,
3247 the value is reset to a plain "zip" and is not useful.
3248