This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
fix for 'make utest' failures (from Ilya Zakharevich)
[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
887d2938
JH
7CONFIGDOTSH (Oldsyms.U):
8 This is set to 'true' in config.sh so that a shell script
9 sourcing config.sh can tell if it has been sourced already.
10
11Mcc (Loc.U):
12 This variable is used internally by Configure to determine the
13 full pathname (if any) of the Mcc program. After Configure runs,
14 the value is reset to a plain "Mcc" and is not useful.
15
16PERL_APIVERSION (Oldsyms.U):
17 This value is manually set in patchlevel.h and is used
18 to set the Configure apiversion variable.
19
20PERL_REVISION (Oldsyms.U):
21 In a Perl version number such as 5.6.2, this is the 5.
22 This value is manually set in patchlevel.h
23
24PERL_SUBVERSION (Oldsyms.U):
25 In a Perl version number such as 5.6.2, this is the 2.
26 Values greater than 50 represent potentially unstable
27 development subversions.
28 This value is manually set in patchlevel.h
29
30PERL_VERSION (Oldsyms.U):
31 In a Perl version number such as 5.6.2, this is the 6.
32 This value is manually set in patchlevel.h
33
781b178c
JH
34_a (Unix.U):
35 This variable defines the extension used for ordinary libraries.
36 For unix, it is '.a'. The '.' is included. Other possible
37 values include '.lib'.
38
39_exe (Unix.U):
40 This variable defines the extension used for executable files.
41 For unix it is empty. Other possible values include '.exe'.
42
43_o (Unix.U):
44 This variable defines the extension used for object files.
45 For unix, it is '.o'. The '.' is included. Other possible
46 values include '.obj'.
47
48afs (afs.U):
49 This variable is set to 'true' if AFS (Andrew File System) is used
50 on the system, 'false' otherwise. It is possible to override this
51 with a hint value or command line option, but you'd better know
52 what you are doing.
53
54alignbytes (alignbytes.U):
55 This variable holds the number of bytes required to align a
56 double. Usual values are 2, 4 and 8.
57
58ansi2knr (ansi2knr.U):
59 This variable is set if the user needs to run ansi2knr.
60 Currently, this is not supported, so we just abort.
61
62aphostname (d_gethname.U):
63 This variable contains the command which can be used to compute the
64 host name. The command is fully qualified by its absolute path, to make
65 it safe when used by a process with super-user privileges.
66
67apiversion (patchlevel.U):
5bf26616
JH
68 MakeMaker will install add-on modules in a directory with the
69 PERL_APIVERSION version number. The value is set manually in
70 patchlevel.h. Normally, for maintenance releases, this is
71 just something like 5.005 or 5.6 or 5.7. That is, it does not
72 include the subversion number and does not change across
73 maintenance releases. This is so that add-on extensions can
74 be shared across maintenance versions. It is unclear how this
75 ought to work for developer versions. If a release breaks
76 binary compatibility, this number should be increased.
781b178c
JH
77
78ar (Loc.U):
5bf26616 79 This variable is used internally by Configure to determine the
781b178c
JH
80 full pathname (if any) of the ar program. After Configure runs,
81 the value is reset to a plain "ar" and is not useful.
82
83archlib (archlib.U):
84 This variable holds the name of the directory in which the user wants
85 to put architecture-dependent public library files for $package.
86 It is most often a local directory such as /usr/local/lib.
87 Programs using this variable must be prepared to deal
88 with filename expansion.
89
90archlibexp (archlib.U):
91 This variable is the same as the archlib variable, but is
92 filename expanded at configuration time, for convenient use.
93
94archname64 (use64bits.U):
95 This variable is used for the 64-bitness part of $archname.
96
97archname (archname.U):
98 This variable is a short name to characterize the current
99 architecture. It is used mainly to construct the default archlib.
100
101archobjs (Unix.U):
102 This variable defines any additional objects that must be linked
103 in with the program on this architecture. On unix, it is usually
104 empty. It is typically used to include emulations of unix calls
105 or other facilities. For perl on OS/2, for example, this would
106 include os2/os2.obj.
107
108awk (Loc.U):
5bf26616 109 This variable is used internally by Configure to determine the
781b178c
JH
110 full pathname (if any) of the awk program. After Configure runs,
111 the value is reset to a plain "awk" and is not useful.
112
113baserev (baserev.U):
114 The base revision level of this package, from the .package file.
115
116bash (Loc.U):
117 This variable is defined but not used by Configure.
118 The value is a plain '' and is not useful.
119
120bin (bin.U):
121 This variable holds the name of the directory in which the user wants
122 to put publicly executable images for the package in question. It
123 is most often a local directory such as /usr/local/bin. Programs using
124 this variable must be prepared to deal with ~name substitution.
125
d71b2b6b
JH
126bincompat5005 (bincompat5005.U):
127 This variable contains y if Perl 5.006 should be binary-compatible
128 with Perl 5.005.
129
781b178c
JH
130binexp (bin.U):
131 This is the same as the bin variable, but is filename expanded at
132 configuration time, for use in your makefiles.
133
134bison (Loc.U):
135 This variable is defined but not used by Configure.
136 The value is a plain '' and is not useful.
137
138byacc (Loc.U):
5bf26616 139 This variable is used internally by Configure to determine the
781b178c
JH
140 full pathname (if any) of the byacc program. After Configure runs,
141 the value is reset to a plain "byacc" and is not useful.
142
143byteorder (byteorder.U):
144 This variable holds the byte order. In the following, larger digits
145 indicate more significance. The variable byteorder is either 4321
146 on a big-endian machine, or 1234 on a little-endian, or 87654321
147 on a Cray ... or 3412 with weird order !
148
149c (n.U):
150 This variable contains the \c string if that is what causes the echo
151 command to suppress newline. Otherwise it is null. Correct usage is
152 $echo $n "prompt for a question: $c".
153
154castflags (d_castneg.U):
155 This variable contains a flag that precise difficulties the
156 compiler has casting odd floating values to unsigned long:
157 0 = ok
158 1 = couldn't cast < 0
159 2 = couldn't cast >= 0x80000000
160 4 = couldn't cast in argument expression list
161
162cat (Loc.U):
5bf26616 163 This variable is used internally by Configure to determine the
781b178c
JH
164 full pathname (if any) of the cat program. After Configure runs,
165 the value is reset to a plain "cat" and is not useful.
166
167cc (cc.U):
168 This variable holds the name of a command to execute a C compiler which
169 can resolve multiple global references that happen to have the same
170 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
171
172cccdlflags (dlsrc.U):
173 This variable contains any special flags that might need to be
174 passed with 'cc -c' to compile modules to be used to create a shared
175 library that will be used for dynamic loading. For hpux, this
176 should be +z. It is up to the makefile to use it.
177
178ccdlflags (dlsrc.U):
179 This variable contains any special flags that might need to be
180 passed to cc to link with a shared library for dynamic loading.
181 It is up to the makefile to use it. For sunos 4.1, it should
182 be empty.
183
184ccflags (ccflags.U):
185 This variable contains any additional C compiler flags desired by
186 the user. It is up to the Makefile to use this.
187
188ccsymbols (Cppsym.U):
189 The variable contains the symbols defined by the C compiler alone.
190 The symbols defined by cpp or by cc when it calls cpp are not in
191 this list, see cppsymbols and cppccsymbols.
192 The list is a space-separated list of symbol=value tokens.
193
194cf_by (cf_who.U):
195 Login name of the person who ran the Configure script and answered the
196 questions. This is used to tag both config.sh and config_h.SH.
197
198cf_email (cf_email.U):
199 Electronic mail address of the person who ran Configure. This can be
200 used by units that require the user's e-mail, like MailList.U.
201
202cf_time (cf_who.U):
203 Holds the output of the "date" command when the configuration file was
204 produced. This is used to tag both config.sh and config_h.SH.
205
a22e52b9
JH
206charsize (charsize.U):
207 This variable contains the value of the CHARSIZE symbol, which
208 indicates to the C program how many bytes there are in a character.
209
781b178c
JH
210chgrp (Loc.U):
211 This variable is defined but not used by Configure.
212 The value is a plain '' and is not useful.
213
214chmod (Loc.U):
215 This variable is defined but not used by Configure.
216 The value is a plain '' and is not useful.
217
218chown (Loc.U):
219 This variable is defined but not used by Configure.
220 The value is a plain '' and is not useful.
221
222clocktype (d_times.U):
223 This variable holds the type returned by times(). It can be long,
224 or clock_t on BSD sites (in which case <sys/types.h> should be
225 included).
226
227comm (Loc.U):
5bf26616 228 This variable is used internally by Configure to determine the
781b178c
JH
229 full pathname (if any) of the comm program. After Configure runs,
230 the value is reset to a plain "comm" and is not useful.
231
232compress (Loc.U):
233 This variable is defined but not used by Configure.
234 The value is a plain '' and is not useful.
235
236contains (contains.U):
237 This variable holds the command to do a grep with a proper return
238 status. On most sane systems it is simply "grep". On insane systems
239 it is a grep followed by a cat followed by a test. This variable
240 is primarily for the use of other Configure units.
241
242cp (Loc.U):
5bf26616 243 This variable is used internally by Configure to determine the
781b178c
JH
244 full pathname (if any) of the cp program. After Configure runs,
245 the value is reset to a plain "cp" and is not useful.
246
247cpio (Loc.U):
248 This variable is defined but not used by Configure.
249 The value is a plain '' and is not useful.
250
251cpp (Loc.U):
5bf26616 252 This variable is used internally by Configure to determine the
781b178c
JH
253 full pathname (if any) of the cpp program. After Configure runs,
254 the value is reset to a plain "cpp" and is not useful.
255
256cpp_stuff (cpp_stuff.U):
257 This variable contains an identification of the catenation mechanism
258 used by the C preprocessor.
259
260cppccsymbols (Cppsym.U):
261 The variable contains the symbols defined by the C compiler when
262 when it calls cpp. The symbols defined by the cc alone or cpp
263 alone are not in this list, see ccsymbols and cppsymbols.
264 The list is a space-separated list of symbol=value tokens.
265
266cppflags (ccflags.U):
267 This variable holds the flags that will be passed to the C pre-
268 processor. It is up to the Makefile to use it.
269
270cpplast (cppstdin.U):
271 This variable has the same functionality as cppminus, only it applies
272 to cpprun and not cppstdin.
273
274cppminus (cppstdin.U):
275 This variable contains the second part of the string which will invoke
276 the C preprocessor on the standard input and produce to standard
277 output. This variable will have the value "-" if cppstdin needs
278 a minus to specify standard input, otherwise the value is "".
279
280cpprun (cppstdin.U):
281 This variable contains the command which will invoke a C preprocessor
282 on standard input and put the output to stdout. It is guaranteed not
283 to be a wrapper and may be a null string if no preprocessor can be
284 made directly available. This preprocessor might be different from the
285 one used by the C compiler. Don't forget to append cpplast after the
286 preprocessor options.
287
288cppstdin (cppstdin.U):
289 This variable contains the command which will invoke the C
290 preprocessor on standard input and put the output to stdout.
291 It is primarily used by other Configure units that ask about
292 preprocessor symbols.
293
294cppsymbols (Cppsym.U):
295 The variable contains the symbols defined by the C preprocessor
296 alone. The symbols defined by cc or by cc when it calls cpp are
297 not in this list, see ccsymbols and cppccsymbols.
298 The list is a space-separated list of symbol=value tokens.
299
300crosscompile (crosscompile.U):
301 This variable conditionally defines the CROSSCOMPILE symbol
302 which signifies that the build process is be a cross-compilation.
303 This is normally set by hints files or from Configure command line.
304
305cryptlib (d_crypt.U):
306 This variable holds -lcrypt or the path to a libcrypt.a archive if
307 the crypt() function is not defined in the standard C library. It is
308 up to the Makefile to use this.
309
310csh (Loc.U):
5bf26616 311 This variable is used internally by Configure to determine the
781b178c
JH
312 full pathname (if any) of the csh program. After Configure runs,
313 the value is reset to a plain "csh" and is not useful.
314
887d2938
JH
315d_Gconvert (d_gconvert.U):
316 This variable holds what Gconvert is defined as to convert
317 floating point numbers into strings. It could be 'gconvert'
318 or a more complex macro emulating gconvert with gcvt() or sprintf.
319 Possible values are:
320 d_Gconvert='gconvert((x),(n),(t),(b))'
321 d_Gconvert='gcvt((x),(n),(b))'
322 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
323
324d_PRIEldbl (longdblfio.U):
325 This variable conditionally defines the PERL_PRIfldlbl symbol, which
326 indiciates that stdio has a symbol to print long doubles.
327
328d_PRIFldbl (longdblfio.U):
329 This variable conditionally defines the PERL_PRIfldlbl symbol, which
330 indiciates that stdio has a symbol to print long doubles.
331
332d_PRIGldbl (longdblfio.U):
333 This variable conditionally defines the PERL_PRIfldlbl symbol, which
334 indiciates that stdio has a symbol to print long doubles.
335
336d_PRIX64 (quadfio.U):
337 This variable conditionally defines the PERL_PRIX64 symbol, which
338 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
339
340d_PRId64 (quadfio.U):
341 This variable conditionally defines the PERL_PRId64 symbol, which
342 indiciates that stdio has a symbol to print 64-bit decimal numbers.
343
344d_PRIeldbl (longdblfio.U):
345 This variable conditionally defines the PERL_PRIfldlbl symbol, which
346 indiciates that stdio has a symbol to print long doubles.
347
348d_PRIfldbl (longdblfio.U):
349 This variable conditionally defines the PERL_PRIfldlbl symbol, which
350 indiciates that stdio has a symbol to print long doubles.
351
352d_PRIgldbl (longdblfio.U):
353 This variable conditionally defines the PERL_PRIfldlbl symbol, which
354 indiciates that stdio has a symbol to print long doubles.
355
356d_PRIi64 (quadfio.U):
357 This variable conditionally defines the PERL_PRIi64 symbol, which
358 indiciates that stdio has a symbol to print 64-bit decimal numbers.
359
360d_PRIo64 (quadfio.U):
361 This variable conditionally defines the PERL_PRIo64 symbol, which
362 indiciates that stdio has a symbol to print 64-bit octal numbers.
363
364d_PRIu64 (quadfio.U):
365 This variable conditionally defines the PERL_PRIu64 symbol, which
366 indiciates that stdio has a symbol to print 64-bit unsigned decimal
367 numbers.
368
369d_PRIx64 (quadfio.U):
370 This variable conditionally defines the PERL_PRIx64 symbol, which
371 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
372
781b178c
JH
373d_access (d_access.U):
374 This variable conditionally defines HAS_ACCESS if the access() system
375 call is available to check for access permissions using real IDs.
376
377d_accessx (d_accessx.U):
378 This variable conditionally defines the HAS_ACCESSX symbol, which
379 indicates to the C program that the accessx() routine is available.
380
381d_alarm (d_alarm.U):
382 This variable conditionally defines the HAS_ALARM symbol, which
383 indicates to the C program that the alarm() routine is available.
384
385d_archlib (archlib.U):
386 This variable conditionally defines ARCHLIB to hold the pathname
387 of architecture-dependent library files for $package. If
388 $archlib is the same as $privlib, then this is set to undef.
389
11dc3f68
JH
390d_atolf (atolf.U):
391 This variable conditionally defines the HAS_ATOLF symbol, which
392 indicates to the C program that the atolf() routine is available.
393
394d_atoll (atoll.U):
395 This variable conditionally defines the HAS_ATOLL symbol, which
396 indicates to the C program that the atoll() routine is available.
397
781b178c
JH
398d_attribut (d_attribut.U):
399 This variable conditionally defines HASATTRIBUTE, which
400 indicates the C compiler can check for function attributes,
401 such as printf formats.
402
403d_bcmp (d_bcmp.U):
404 This variable conditionally defines the HAS_BCMP symbol if
405 the bcmp() routine is available to compare strings.
406
407d_bcopy (d_bcopy.U):
408 This variable conditionally defines the HAS_BCOPY symbol if
409 the bcopy() routine is available to copy strings.
410
d71b2b6b
JH
411d_bincompat5005 (bincompat5005.U):
412 This variable conditionally defines BINCOMPAT5005 so that embed.h
413 can take special action if Perl 5.006 should be binary-compatible
414 with Perl 5.005. This is impossible for builds that use features
415 like threads and multiplicity it is always $undef for those versions.
416
781b178c
JH
417d_bsd (Guess.U):
418 This symbol conditionally defines the symbol BSD when running on a
419 BSD system.
420
421d_bsdgetpgrp (d_getpgrp.U):
422 This variable conditionally defines USE_BSD_GETPGRP if
423 getpgrp needs one arguments whereas USG one needs none.
424
425d_bsdsetpgrp (d_setpgrp.U):
426 This variable conditionally defines USE_BSD_SETPGRP if
427 setpgrp needs two arguments whereas USG one needs none.
428 See also d_setpgid for a POSIX interface.
429
430d_bzero (d_bzero.U):
431 This variable conditionally defines the HAS_BZERO symbol if
432 the bzero() routine is available to set memory to 0.
433
434d_casti32 (d_casti32.U):
435 This variable conditionally defines CASTI32, which indicates
436 whether the C compiler can cast large floats to 32-bit ints.
437
438d_castneg (d_castneg.U):
439 This variable conditionally defines CASTNEG, which indicates
440 wether the C compiler can cast negative float to unsigned.
441
442d_charvspr (d_vprintf.U):
443 This variable conditionally defines CHARVSPRINTF if this system
444 has vsprintf returning type (char*). The trend seems to be to
445 declare it as "int vsprintf()".
446
447d_chown (d_chown.U):
448 This variable conditionally defines the HAS_CHOWN symbol, which
449 indicates to the C program that the chown() routine is available.
450
451d_chroot (d_chroot.U):
452 This variable conditionally defines the HAS_CHROOT symbol, which
453 indicates to the C program that the chroot() routine is available.
454
455d_chsize (d_chsize.U):
456 This variable conditionally defines the CHSIZE symbol, which
457 indicates to the C program that the chsize() routine is available
458 to truncate files. You might need a -lx to get this routine.
459
460d_closedir (d_closedir.U):
461 This variable conditionally defines HAS_CLOSEDIR if closedir() is
462 available.
463
781b178c
JH
464d_const (d_const.U):
465 This variable conditionally defines the HASCONST symbol, which
466 indicates to the C program that this C compiler knows about the
467 const type.
468
469d_crypt (d_crypt.U):
470 This variable conditionally defines the CRYPT symbol, which
471 indicates to the C program that the crypt() routine is available
472 to encrypt passwords and the like.
473
474d_csh (d_csh.U):
475 This variable conditionally defines the CSH symbol, which
476 indicates to the C program that the C-shell exists.
477
478d_cuserid (d_cuserid.U):
479 This variable conditionally defines the HAS_CUSERID symbol, which
480 indicates to the C program that the cuserid() routine is available
481 to get character login names.
482
483d_dbl_dig (d_dbl_dig.U):
484 This variable conditionally defines d_dbl_dig if this system's
485 header files provide DBL_DIG, which is the number of significant
486 digits in a double precision number.
487
781b178c
JH
488d_difftime (d_difftime.U):
489 This variable conditionally defines the HAS_DIFFTIME symbol, which
490 indicates to the C program that the difftime() routine is available.
491
781b178c
JH
492d_dirnamlen (i_dirent.U):
493 This variable conditionally defines DIRNAMLEN, which indicates
494 to the C program that the length of directory entry names is
495 provided by a d_namelen field.
496
497d_dlerror (d_dlerror.U):
498 This variable conditionally defines the HAS_DLERROR symbol, which
499 indicates to the C program that the dlerror() routine is available.
500
501d_dlopen (d_dlopen.U):
502 This variable conditionally defines the HAS_DLOPEN symbol, which
503 indicates to the C program that the dlopen() routine is available.
504
505d_dlsymun (d_dlsymun.U):
506 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
507 indicates that we need to prepend an underscore to the symbol
508 name before calling dlsym().
509
510d_dosuid (d_dosuid.U):
511 This variable conditionally defines the symbol DOSUID, which
512 tells the C program that it should insert setuid emulation code
513 on hosts which have setuid #! scripts disabled.
514
515d_drand48proto (d_drand48proto.U):
516 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
517 which indicates to the C program that the system provides
518 a prototype for the drand48() function. Otherwise, it is
519 up to the program to supply one.
520
521d_dup2 (d_dup2.U):
522 This variable conditionally defines HAS_DUP2 if dup2() is
523 available to duplicate file descriptors.
524
525d_eaccess (d_eaccess.U):
526 This variable conditionally defines the HAS_EACCESS symbol, which
527 indicates to the C program that the eaccess() routine is available.
528
529d_endgrent (d_endgrent.U):
530 This variable conditionally defines the HAS_ENDGRENT symbol, which
531 indicates to the C program that the endgrent() routine is available
532 for sequential access of the group database.
533
534d_endhent (d_endhent.U):
535 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
536 available to close whatever was being used for host queries.
537
538d_endnent (d_endnent.U):
539 This variable conditionally defines HAS_ENDNETENT if endnetent() is
540 available to close whatever was being used for network queries.
541
542d_endpent (d_endpent.U):
543 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
544 available to close whatever was being used for protocol queries.
545
546d_endpwent (d_endpwent.U):
547 This variable conditionally defines the HAS_ENDPWENT symbol, which
548 indicates to the C program that the endpwent() routine is available
549 for sequential access of the passwd database.
550
551d_endsent (d_endsent.U):
552 This variable conditionally defines HAS_ENDSERVENT if endservent() is
553 available to close whatever was being used for service queries.
554
555d_endspent (d_endspent.U):
556 This variable conditionally defines HAS_ENDSPENT if endspent() is
557 available to finalize the scan of SysV shadow password entries.
558
559d_eofnblk (nblock_io.U):
560 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
561 when reading from a non-blocking I/O source.
562
563d_eunice (Guess.U):
564 This variable conditionally defines the symbols EUNICE and VAX, which
565 alerts the C program that it must deal with ideosyncracies of VMS.
566
567d_fchmod (d_fchmod.U):
568 This variable conditionally defines the HAS_FCHMOD symbol, which
569 indicates to the C program that the fchmod() routine is available
570 to change mode of opened files.
571
572d_fchown (d_fchown.U):
573 This variable conditionally defines the HAS_FCHOWN symbol, which
574 indicates to the C program that the fchown() routine is available
575 to change ownership of opened files.
576
577d_fcntl (d_fcntl.U):
578 This variable conditionally defines the HAS_FCNTL symbol, and indicates
579 whether the fcntl() function exists
580
581d_fd_macros (d_fd_set.U):
582 This variable contains the eventual value of the HAS_FD_MACROS symbol,
583 which indicates if your C compiler knows about the macros which
584 manipulate an fd_set.
585
586d_fd_set (d_fd_set.U):
587 This variable contains the eventual value of the HAS_FD_SET symbol,
588 which indicates if your C compiler knows about the fd_set typedef.
589
590d_fds_bits (d_fd_set.U):
591 This variable contains the eventual value of the HAS_FDS_BITS symbol,
592 which indicates if your fd_set typedef contains the fds_bits member.
593 If you have an fd_set typedef, but the dweebs who installed it did
594 a half-fast job and neglected to provide the macros to manipulate
595 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
596
781b178c
JH
597d_fgetpos (d_fgetpos.U):
598 This variable conditionally defines HAS_FGETPOS if fgetpos() is
599 available to get the file position indicator.
600
781b178c
JH
601d_flexfnam (d_flexfnam.U):
602 This variable conditionally defines the FLEXFILENAMES symbol, which
603 indicates that the system supports filenames longer than 14 characters.
604
781b178c
JH
605d_flock (d_flock.U):
606 This variable conditionally defines HAS_FLOCK if flock() is
607 available to do file locking.
608
781b178c
JH
609d_fork (d_fork.U):
610 This variable conditionally defines the HAS_FORK symbol, which
611 indicates to the C program that the fork() routine is available.
612
613d_fpathconf (d_pathconf.U):
614 This variable conditionally defines the HAS_FPATHCONF symbol, which
615 indicates to the C program that the pathconf() routine is available
616 to determine file-system related limits and options associated
617 with a given open file descriptor.
618
ca24dfc6
LV
619d_fpos64_t (io64.U):
620 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 621
ad27e871 622d_fs_data_s (d_fs_data_s.U):
0545a864
JH
623 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
624 which indicates that the struct fs_data is supported.
625
781b178c
JH
626d_fseeko (d_fseeko.U):
627 This variable conditionally defines the HAS_FSEEKO symbol, which
628 indicates to the C program that the fseeko() routine is available.
629
781b178c
JH
630d_fsetpos (d_fsetpos.U):
631 This variable conditionally defines HAS_FSETPOS if fsetpos() is
632 available to set the file position indicator.
633
0545a864 634d_fstatfs (d_fstatfs.U):
781b178c
JH
635 This variable conditionally defines the HAS_FSTATFS symbol, which
636 indicates to the C program that the fstatfs() routine is available.
637
638d_fstatvfs (d_statvfs.U):
639 This variable conditionally defines the HAS_FSTATVFS symbol, which
640 indicates to the C program that the fstatvfs() routine is available.
641
781b178c
JH
642d_ftello (d_ftello.U):
643 This variable conditionally defines the HAS_FTELLO symbol, which
644 indicates to the C program that the ftello() routine is available.
645
646d_ftime (d_ftime.U):
647 This variable conditionally defines the HAS_FTIME symbol, which indicates
648 that the ftime() routine exists. The ftime() routine is basically
649 a sub-second accuracy clock.
650
781b178c
JH
651d_getgrent (d_getgrent.U):
652 This variable conditionally defines the HAS_GETGRENT symbol, which
653 indicates to the C program that the getgrent() routine is available
654 for sequential access of the group database.
655
656d_getgrps (d_getgrps.U):
657 This variable conditionally defines the HAS_GETGROUPS symbol, which
658 indicates to the C program that the getgroups() routine is available
659 to get the list of process groups.
660
661d_gethbyaddr (d_gethbyad.U):
662 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
663 indicates to the C program that the gethostbyaddr() routine is available
664 to look up hosts by their IP addresses.
665
666d_gethbyname (d_gethbynm.U):
667 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
668 indicates to the C program that the gethostbyname() routine is available
669 to look up host names in some data base or other.
670
671d_gethent (d_gethent.U):
672 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
673 available to look up host names in some data base or another.
674
675d_gethname (d_gethname.U):
676 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
677 indicates to the C program that the gethostname() routine may be
678 used to derive the host name.
679
680d_gethostprotos (d_gethostprotos.U):
681 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
682 which indicates to the C program that <netdb.h> supplies
683 prototypes for the various gethost*() functions.
684 See also netdbtype.U for probing for various netdb types.
685
686d_getlogin (d_getlogin.U):
687 This variable conditionally defines the HAS_GETLOGIN symbol, which
688 indicates to the C program that the getlogin() routine is available
689 to get the login name.
690
ad27e871
JH
691d_getmnt (d_getmnt.U):
692 This variable conditionally defines the HAS_GETMNT symbol, which
693 indicates to the C program that the getmnt() routine is available
694 to retrieve one or more mount info blocks by filename.
695
781b178c
JH
696d_getmntent (d_getmntent.U):
697 This variable conditionally defines the HAS_GETMNTENT symbol, which
698 indicates to the C program that the getmntent() routine is available
0617aed7 699 to iterate through mounted files to get their mount info.
781b178c
JH
700
701d_getnbyaddr (d_getnbyad.U):
702 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
703 indicates to the C program that the getnetbyaddr() routine is available
704 to look up networks by their IP addresses.
705
706d_getnbyname (d_getnbynm.U):
707 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
708 indicates to the C program that the getnetbyname() routine is available
709 to look up networks by their names.
710
711d_getnent (d_getnent.U):
712 This variable conditionally defines HAS_GETNETENT if getnetent() is
713 available to look up network names in some data base or another.
714
715d_getnetprotos (d_getnetprotos.U):
716 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
717 which indicates to the C program that <netdb.h> supplies
718 prototypes for the various getnet*() functions.
719 See also netdbtype.U for probing for various netdb types.
720
721d_getpbyname (d_getprotby.U):
722 This variable conditionally defines the HAS_GETPROTOBYNAME
723 symbol, which indicates to the C program that the
724 getprotobyname() routine is available to look up protocols
725 by their name.
726
727d_getpbynumber (d_getprotby.U):
728 This variable conditionally defines the HAS_GETPROTOBYNUMBER
729 symbol, which indicates to the C program that the
730 getprotobynumber() routine is available to look up protocols
731 by their number.
732
733d_getpent (d_getpent.U):
734 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
735 available to look up protocols in some data base or another.
736
737d_getpgid (d_getpgid.U):
738 This variable conditionally defines the HAS_GETPGID symbol, which
739 indicates to the C program that the getpgid(pid) function
740 is available to get the process group id.
741
742d_getpgrp2 (d_getpgrp2.U):
743 This variable conditionally defines the HAS_GETPGRP2 symbol, which
744 indicates to the C program that the getpgrp2() (as in DG/UX) routine
745 is available to get the current process group.
746
747d_getpgrp (d_getpgrp.U):
748 This variable conditionally defines HAS_GETPGRP if getpgrp() is
749 available to get the current process group.
750
751d_getppid (d_getppid.U):
752 This variable conditionally defines the HAS_GETPPID symbol, which
753 indicates to the C program that the getppid() routine is available
754 to get the parent process ID.
755
756d_getprior (d_getprior.U):
757 This variable conditionally defines HAS_GETPRIORITY if getpriority()
758 is available to get a process's priority.
759
760d_getprotoprotos (d_getprotoprotos.U):
761 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
762 which indicates to the C program that <netdb.h> supplies
763 prototypes for the various getproto*() functions.
764 See also netdbtype.U for probing for various netdb types.
765
766d_getpwent (d_getpwent.U):
767 This variable conditionally defines the HAS_GETPWENT symbol, which
768 indicates to the C program that the getpwent() routine is available
769 for sequential access of the passwd database.
770
771d_getsbyname (d_getsrvby.U):
772 This variable conditionally defines the HAS_GETSERVBYNAME
773 symbol, which indicates to the C program that the
774 getservbyname() routine is available to look up services
775 by their name.
776
777d_getsbyport (d_getsrvby.U):
778 This variable conditionally defines the HAS_GETSERVBYPORT
779 symbol, which indicates to the C program that the
780 getservbyport() routine is available to look up services
781 by their port.
782
783d_getsent (d_getsent.U):
784 This variable conditionally defines HAS_GETSERVENT if getservent() is
785 available to look up network services in some data base or another.
786
787d_getservprotos (d_getservprotos.U):
788 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
789 which indicates to the C program that <netdb.h> supplies
790 prototypes for the various getserv*() functions.
791 See also netdbtype.U for probing for various netdb types.
792
793d_getspent (d_getspent.U):
794 This variable conditionally defines HAS_GETSPENT if getspent() is
795 available to retrieve SysV shadow password entries sequentially.
796
797d_getspnam (d_getspnam.U):
798 This variable conditionally defines HAS_GETSPNAM if getspnam() is
799 available to retrieve SysV shadow password entries by name.
800
801d_gettimeod (d_ftime.U):
802 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
803 indicates that the gettimeofday() system call exists (to obtain a
804 sub-second accuracy clock). You should probably include <sys/resource.h>.
805
806d_gnulibc (d_gnulibc.U):
807 Defined if we're dealing with the GNU C Library.
808
809d_grpasswd (i_grp.U):
810 This variable conditionally defines GRPASSWD, which indicates
811 that struct group in <grp.h> contains gr_passwd.
812
813d_hasmntopt (d_hasmntopt.U):
814 This variable conditionally defines the HAS_HASMNTOPT symbol, which
815 indicates to the C program that the hasmntopt() routine is available
816 to query the mount options of file systems.
817
818d_htonl (d_htonl.U):
819 This variable conditionally defines HAS_HTONL if htonl() and its
820 friends are available to do network order byte swapping.
821
822d_index (d_strchr.U):
823 This variable conditionally defines HAS_INDEX if index() and
824 rindex() are available for string searching.
825
826d_inetaton (d_inetaton.U):
827 This variable conditionally defines the HAS_INET_ATON symbol, which
828 indicates to the C program that the inet_aton() function is available
829 to parse IP address "dotted-quad" strings.
830
e0a10278 831d_int64t (d_int64t.U):
781b178c
JH
832 This symbol will be defined if the C compiler supports int64_t.
833
781b178c
JH
834d_isascii (d_isascii.U):
835 This variable conditionally defines the HAS_ISASCII constant,
836 which indicates to the C program that isascii() is available.
837
838d_killpg (d_killpg.U):
839 This variable conditionally defines the HAS_KILLPG symbol, which
840 indicates to the C program that the killpg() routine is available
841 to kill process groups.
842
843d_lchown (d_lchown.U):
844 This variable conditionally defines the HAS_LCHOWN symbol, which
845 indicates to the C program that the lchown() routine is available
846 to operate on a symbolic link (instead of following the link).
847
ca24dfc6
LV
848d_ldbl_dig (d_ldbl_dig.U):
849 This variable conditionally defines d_ldbl_dig if this system's
850 header files provide LDBL_DIG, which is the number of significant
851 digits in a long double precision number.
852
781b178c
JH
853d_link (d_link.U):
854 This variable conditionally defines HAS_LINK if link() is
855 available to create hard links.
856
781b178c
JH
857d_locconv (d_locconv.U):
858 This variable conditionally defines HAS_LOCALECONV if localeconv() is
859 available for numeric and monetary formatting conventions.
860
781b178c
JH
861d_lockf (d_lockf.U):
862 This variable conditionally defines HAS_LOCKF if lockf() is
863 available to do file locking.
864
865d_longdbl (d_longdbl.U):
866 This variable conditionally defines HAS_LONG_DOUBLE if
867 the long double type is supported.
868
869d_longlong (d_longlong.U):
870 This variable conditionally defines HAS_LONG_LONG if
871 the long long type is supported.
872
781b178c
JH
873d_lstat (d_lstat.U):
874 This variable conditionally defines HAS_LSTAT if lstat() is
875 available to do file stats on symbolic links.
876
781b178c
JH
877d_mblen (d_mblen.U):
878 This variable conditionally defines the HAS_MBLEN symbol, which
879 indicates to the C program that the mblen() routine is available
880 to find the number of bytes in a multibye character.
881
882d_mbstowcs (d_mbstowcs.U):
883 This variable conditionally defines the HAS_MBSTOWCS symbol, which
884 indicates to the C program that the mbstowcs() routine is available
885 to convert a multibyte string into a wide character string.
886
887d_mbtowc (d_mbtowc.U):
888 This variable conditionally defines the HAS_MBTOWC symbol, which
889 indicates to the C program that the mbtowc() routine is available
890 to convert multibyte to a wide character.
891
892d_memchr (d_memchr.U):
893 This variable conditionally defines the HAS_MEMCHR symbol, which
894 indicates to the C program that the memchr() routine is available
895 to locate characters within a C string.
896
897d_memcmp (d_memcmp.U):
898 This variable conditionally defines the HAS_MEMCMP symbol, which
899 indicates to the C program that the memcmp() routine is available
900 to compare blocks of memory.
901
902d_memcpy (d_memcpy.U):
903 This variable conditionally defines the HAS_MEMCPY symbol, which
904 indicates to the C program that the memcpy() routine is available
905 to copy blocks of memory.
906
907d_memmove (d_memmove.U):
908 This variable conditionally defines the HAS_MEMMOVE symbol, which
909 indicates to the C program that the memmove() routine is available
910 to copy potentatially overlapping blocks of memory.
911
912d_memset (d_memset.U):
913 This variable conditionally defines the HAS_MEMSET symbol, which
914 indicates to the C program that the memset() routine is available
915 to set blocks of memory.
916
917d_mkdir (d_mkdir.U):
918 This variable conditionally defines the HAS_MKDIR symbol, which
919 indicates to the C program that the mkdir() routine is available
920 to create directories..
921
922d_mkfifo (d_mkfifo.U):
923 This variable conditionally defines the HAS_MKFIFO symbol, which
924 indicates to the C program that the mkfifo() routine is available.
925
926d_mktime (d_mktime.U):
927 This variable conditionally defines the HAS_MKTIME symbol, which
928 indicates to the C program that the mktime() routine is available.
929
781b178c
JH
930d_msg (d_msg.U):
931 This variable conditionally defines the HAS_MSG symbol, which
932 indicates that the entire msg*(2) library is present.
933
934d_msg_ctrunc (d_socket.U):
935 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
936 which indicates that the MSG_CTRUNC is available. #ifdef is
937 not enough because it may be an enum, glibc has been known to do this.
938
939d_msg_dontroute (d_socket.U):
940 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
941 which indicates that the MSG_DONTROUTE is available. #ifdef is
942 not enough because it may be an enum, glibc has been known to do this.
943
944d_msg_oob (d_socket.U):
945 This variable conditionally defines the HAS_MSG_OOB symbol,
946 which indicates that the MSG_OOB is available. #ifdef is
947 not enough because it may be an enum, glibc has been known to do this.
948
949d_msg_peek (d_socket.U):
950 This variable conditionally defines the HAS_MSG_PEEK symbol,
951 which indicates that the MSG_PEEK is available. #ifdef is
952 not enough because it may be an enum, glibc has been known to do this.
953
954d_msg_proxy (d_socket.U):
955 This variable conditionally defines the HAS_MSG_PROXY symbol,
956 which indicates that the MSG_PROXY is available. #ifdef is
957 not enough because it may be an enum, glibc has been known to do this.
958
959d_msgctl (d_msgctl.U):
960 This variable conditionally defines the HAS_MSGCTL symbol, which
961 indicates to the C program that the msgctl() routine is available.
962
963d_msgget (d_msgget.U):
964 This variable conditionally defines the HAS_MSGGET symbol, which
965 indicates to the C program that the msgget() routine is available.
966
781b178c
JH
967d_msgrcv (d_msgrcv.U):
968 This variable conditionally defines the HAS_MSGRCV symbol, which
969 indicates to the C program that the msgrcv() routine is available.
970
971d_msgsnd (d_msgsnd.U):
972 This variable conditionally defines the HAS_MSGSND symbol, which
973 indicates to the C program that the msgsnd() routine is available.
974
781b178c
JH
975d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
979
781b178c
JH
980d_nice (d_nice.U):
981 This variable conditionally defines the HAS_NICE symbol, which
982 indicates to the C program that the nice() routine is available.
983
984d_off64_t (io64.U):
985 This symbol will be defined if the C compiler supports off64_t.
986
781b178c
JH
987d_old_pthread_create_joinable (d_pthrattrj.U):
988 This variable conditionally defines pthread_create_joinable.
989 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
990
991d_oldpthreads (usethreads.U):
992 This variable conditionally defines the OLD_PTHREADS_API symbol,
993 and indicates that Perl should be built to use the old
8c09e4ca 994 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
995 usethreads is set.
996
997d_oldsock (d_socket.U):
998 This variable conditionally defines the OLDSOCKET symbol, which
999 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1000
1001d_open3 (d_open3.U):
1002 This variable conditionally defines the HAS_OPEN3 manifest constant,
1003 which indicates to the C program that the 3 argument version of
1004 the open(2) function is available.
1005
781b178c
JH
1006d_pathconf (d_pathconf.U):
1007 This variable conditionally defines the HAS_PATHCONF symbol, which
1008 indicates to the C program that the pathconf() routine is available
1009 to determine file-system related limits and options associated
1010 with a given filename.
1011
1012d_pause (d_pause.U):
1013 This variable conditionally defines the HAS_PAUSE symbol, which
1014 indicates to the C program that the pause() routine is available
1015 to suspend a process until a signal is received.
1016
1017d_phostname (d_gethname.U):
1018 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1019 contains the shell command which, when fed to popen(), may be
1020 used to derive the host name.
1021
1022d_pipe (d_pipe.U):
1023 This variable conditionally defines the HAS_PIPE symbol, which
1024 indicates to the C program that the pipe() routine is available
1025 to create an inter-process channel.
1026
1027d_poll (d_poll.U):
1028 This variable conditionally defines the HAS_POLL symbol, which
1029 indicates to the C program that the poll() routine is available
1030 to poll active file descriptors.
1031
1032d_portable (d_portable.U):
1033 This variable conditionally defines the PORTABLE symbol, which
1034 indicates to the C program that it should not assume that it is
1035 running on the machine it was compiled on.
1036
1037d_pthread_yield (d_pthread_y.U):
1038 This variable conditionally defines the HAS_PTHREAD_YIELD
1039 symbol if the pthread_yield routine is available to yield
1040 the execution of the current thread.
1041
1042d_pwage (i_pwd.U):
1043 This variable conditionally defines PWAGE, which indicates
1044 that struct passwd contains pw_age.
1045
1046d_pwchange (i_pwd.U):
1047 This variable conditionally defines PWCHANGE, which indicates
1048 that struct passwd contains pw_change.
1049
1050d_pwclass (i_pwd.U):
1051 This variable conditionally defines PWCLASS, which indicates
1052 that struct passwd contains pw_class.
1053
1054d_pwcomment (i_pwd.U):
1055 This variable conditionally defines PWCOMMENT, which indicates
1056 that struct passwd contains pw_comment.
1057
1058d_pwexpire (i_pwd.U):
1059 This variable conditionally defines PWEXPIRE, which indicates
1060 that struct passwd contains pw_expire.
1061
1062d_pwgecos (i_pwd.U):
1063 This variable conditionally defines PWGECOS, which indicates
1064 that struct passwd contains pw_gecos.
1065
1066d_pwpasswd (i_pwd.U):
1067 This variable conditionally defines PWPASSWD, which indicates
1068 that struct passwd contains pw_passwd.
1069
1070d_pwquota (i_pwd.U):
1071 This variable conditionally defines PWQUOTA, which indicates
1072 that struct passwd contains pw_quota.
1073
de1c2614
JH
1074d_quad (quadtype.U):
1075 This variable, if defined, tells that there's a 64-bit integer type,
1076 quadtype.
1077
781b178c
JH
1078d_readdir (d_readdir.U):
1079 This variable conditionally defines HAS_READDIR if readdir() is
1080 available to read directory entries.
1081
1082d_readlink (d_readlink.U):
1083 This variable conditionally defines the HAS_READLINK symbol, which
1084 indicates to the C program that the readlink() routine is available
1085 to read the value of a symbolic link.
1086
781b178c
JH
1087d_rename (d_rename.U):
1088 This variable conditionally defines the HAS_RENAME symbol, which
1089 indicates to the C program that the rename() routine is available
1090 to rename files.
1091
1092d_rewinddir (d_readdir.U):
1093 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1094 available.
1095
1096d_rmdir (d_rmdir.U):
1097 This variable conditionally defines HAS_RMDIR if rmdir() is
1098 available to remove directories.
1099
1100d_safebcpy (d_safebcpy.U):
1101 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1102 the bcopy() routine can do overlapping copies.
1103
1104d_safemcpy (d_safemcpy.U):
1105 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1106 the memcpy() routine can do overlapping copies.
1107
1108d_sanemcmp (d_sanemcmp.U):
1109 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1110 the memcpy() routine is available and can be used to compare relative
1111 magnitudes of chars with their high bits set.
1112
1113d_sched_yield (d_pthread_y.U):
1114 This variable conditionally defines the HAS_SCHED_YIELD
1115 symbol if the sched_yield routine is available to yield
1116 the execution of the current thread.
1117
1118d_scm_rights (d_socket.U):
1119 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1120 which indicates that the SCM_RIGHTS is available. #ifdef is
1121 not enough because it may be an enum, glibc has been known to do this.
1122
781b178c
JH
1123d_seekdir (d_readdir.U):
1124 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1125 available.
1126
1127d_select (d_select.U):
1128 This variable conditionally defines HAS_SELECT if select() is
1129 available to select active file descriptors. A <sys/time.h>
1130 inclusion may be necessary for the timeout field.
1131
1132d_sem (d_sem.U):
1133 This variable conditionally defines the HAS_SEM symbol, which
1134 indicates that the entire sem*(2) library is present.
1135
1136d_semctl (d_semctl.U):
1137 This variable conditionally defines the HAS_SEMCTL symbol, which
1138 indicates to the C program that the semctl() routine is available.
1139
1140d_semctl_semid_ds (d_union_semun.U):
1141 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1142 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1143
1144d_semctl_semun (d_union_semun.U):
1145 This variable conditionally defines USE_SEMCTL_SEMUN, which
1146 indicates that union semun is to be used for semctl IPC_STAT.
1147
1148d_semget (d_semget.U):
1149 This variable conditionally defines the HAS_SEMGET symbol, which
1150 indicates to the C program that the semget() routine is available.
1151
1152d_semop (d_semop.U):
1153 This variable conditionally defines the HAS_SEMOP symbol, which
1154 indicates to the C program that the semop() routine is available.
1155
781b178c
JH
1156d_setegid (d_setegid.U):
1157 This variable conditionally defines the HAS_SETEGID symbol, which
1158 indicates to the C program that the setegid() routine is available
1159 to change the effective gid of the current program.
1160
1161d_seteuid (d_seteuid.U):
1162 This variable conditionally defines the HAS_SETEUID symbol, which
1163 indicates to the C program that the seteuid() routine is available
1164 to change the effective uid of the current program.
1165
1166d_setgrent (d_setgrent.U):
1167 This variable conditionally defines the HAS_SETGRENT symbol, which
1168 indicates to the C program that the setgrent() routine is available
1169 for initializing sequential access to the group database.
1170
1171d_setgrps (d_setgrps.U):
1172 This variable conditionally defines the HAS_SETGROUPS symbol, which
1173 indicates to the C program that the setgroups() routine is available
1174 to set the list of process groups.
1175
1176d_sethent (d_sethent.U):
1177 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1178 available.
1179
1180d_setlinebuf (d_setlnbuf.U):
1181 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1182 indicates to the C program that the setlinebuf() routine is available
1183 to change stderr or stdout from block-buffered or unbuffered to a
1184 line-buffered mode.
1185
1186d_setlocale (d_setlocale.U):
1187 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1188 available to handle locale-specific ctype implementations.
1189
1190d_setnent (d_setnent.U):
1191 This variable conditionally defines HAS_SETNETENT if setnetent() is
1192 available.
1193
1194d_setpent (d_setpent.U):
1195 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1196 available.
1197
1198d_setpgid (d_setpgid.U):
1199 This variable conditionally defines the HAS_SETPGID symbol if the
1200 setpgid(pid, gpid) function is available to set process group ID.
1201
1202d_setpgrp2 (d_setpgrp2.U):
1203 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1204 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1205 is available to set the current process group.
1206
1207d_setpgrp (d_setpgrp.U):
1208 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1209 available to set the current process group.
1210
1211d_setprior (d_setprior.U):
1212 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1213 is available to set a process's priority.
1214
1215d_setpwent (d_setpwent.U):
1216 This variable conditionally defines the HAS_SETPWENT symbol, which
1217 indicates to the C program that the setpwent() routine is available
1218 for initializing sequential access to the passwd database.
1219
1220d_setregid (d_setregid.U):
1221 This variable conditionally defines HAS_SETREGID if setregid() is
1222 available to change the real and effective gid of the current
1223 process.
1224
1225d_setresgid (d_setregid.U):
1226 This variable conditionally defines HAS_SETRESGID if setresgid() is
1227 available to change the real, effective and saved gid of the current
1228 process.
1229
1230d_setresuid (d_setreuid.U):
1231 This variable conditionally defines HAS_SETREUID if setresuid() is
1232 available to change the real, effective and saved uid of the current
1233 process.
1234
1235d_setreuid (d_setreuid.U):
1236 This variable conditionally defines HAS_SETREUID if setreuid() is
1237 available to change the real and effective uid of the current
1238 process.
1239
1240d_setrgid (d_setrgid.U):
1241 This variable conditionally defines the HAS_SETRGID symbol, which
1242 indicates to the C program that the setrgid() routine is available
1243 to change the real gid of the current program.
1244
1245d_setruid (d_setruid.U):
1246 This variable conditionally defines the HAS_SETRUID symbol, which
1247 indicates to the C program that the setruid() routine is available
1248 to change the real uid of the current program.
1249
1250d_setsent (d_setsent.U):
1251 This variable conditionally defines HAS_SETSERVENT if setservent() is
1252 available.
1253
1254d_setsid (d_setsid.U):
1255 This variable conditionally defines HAS_SETSID if setsid() is
1256 available to set the process group ID.
1257
1258d_setspent (d_setspent.U):
1259 This variable conditionally defines HAS_SETSPENT if setspent() is
1260 available to initialize the scan of SysV shadow password entries.
1261
1262d_setvbuf (d_setvbuf.U):
1263 This variable conditionally defines the HAS_SETVBUF symbol, which
1264 indicates to the C program that the setvbuf() routine is available
1265 to change buffering on an open stdio stream.
1266
1267d_sfio (d_sfio.U):
1268 This variable conditionally defines the USE_SFIO symbol,
1269 and indicates whether sfio is available (and should be used).
1270
1271d_shm (d_shm.U):
1272 This variable conditionally defines the HAS_SHM symbol, which
1273 indicates that the entire shm*(2) library is present.
1274
1275d_shmat (d_shmat.U):
1276 This variable conditionally defines the HAS_SHMAT symbol, which
1277 indicates to the C program that the shmat() routine is available.
1278
1279d_shmatprototype (d_shmat.U):
1280 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1281 symbol, which indicates that sys/shm.h has a prototype for
1282 shmat.
1283
1284d_shmctl (d_shmctl.U):
1285 This variable conditionally defines the HAS_SHMCTL symbol, which
1286 indicates to the C program that the shmctl() routine is available.
1287
1288d_shmdt (d_shmdt.U):
1289 This variable conditionally defines the HAS_SHMDT symbol, which
1290 indicates to the C program that the shmdt() routine is available.
1291
1292d_shmget (d_shmget.U):
1293 This variable conditionally defines the HAS_SHMGET symbol, which
1294 indicates to the C program that the shmget() routine is available.
1295
1296d_sigaction (d_sigaction.U):
1297 This variable conditionally defines the HAS_SIGACTION symbol, which
1298 indicates that the Vr4 sigaction() routine is available.
1299
1300d_sigsetjmp (d_sigsetjmp.U):
1301 This variable conditionally defines the HAS_SIGSETJMP symbol,
1302 which indicates that the sigsetjmp() routine is available to
1303 call setjmp() and optionally save the process's signal mask.
1304
1305d_socket (d_socket.U):
1306 This variable conditionally defines HAS_SOCKET, which indicates
1307 that the BSD socket interface is supported.
1308
1309d_sockpair (d_socket.U):
1310 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1311 indicates that the BSD socketpair() is supported.
1312
68d4903c
JH
1313d_sqrtl (d_sqrtl.U):
1314 This variable conditionally defines the HAS_SQRTL symbol, which
1315 indicates to the C program that the sqrtl() routine is available.
1316
781b178c
JH
1317d_statblks (d_statblks.U):
1318 This variable conditionally defines USE_STAT_BLOCKS
1319 if this system has a stat structure declaring
1320 st_blksize and st_blocks.
1321
ad27e871 1322d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1323 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
1324 symbol, which indicates to struct statfs from has f_flags member.
1325 This kind of struct statfs is coming from sys/mount.h (BSD),
1326 not from sys/statfs.h (SYSV).
1327
ad27e871 1328d_statfs_s (d_statfs_s.U):
0545a864
JH
1329 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1330 which indicates that the struct statfs is supported.
1331
781b178c
JH
1332d_statvfs (d_statvfs.U):
1333 This variable conditionally defines the HAS_STATVFS symbol, which
1334 indicates to the C program that the statvfs() routine is available.
1335
1336d_stdio_cnt_lval (d_stdstdio.U):
1337 This variable conditionally defines STDIO_CNT_LVALUE if the
1338 FILE_cnt macro can be used as an lvalue.
1339
1340d_stdio_ptr_lval (d_stdstdio.U):
1341 This variable conditionally defines STDIO_PTR_LVALUE if the
1342 FILE_ptr macro can be used as an lvalue.
1343
1344d_stdio_stream_array (stdio_streams.U):
1345 This variable tells whether there is an array holding
1346 the stdio streams.
1347
1348d_stdiobase (d_stdstdio.U):
1349 This variable conditionally defines USE_STDIO_BASE if this system
1350 has a FILE structure declaring a usable _base field (or equivalent)
1351 in stdio.h.
1352
1353d_stdstdio (d_stdstdio.U):
1354 This variable conditionally defines USE_STDIO_PTR if this system
1355 has a FILE structure declaring usable _ptr and _cnt fields (or
1356 equivalent) in stdio.h.
1357
781b178c
JH
1358d_strchr (d_strchr.U):
1359 This variable conditionally defines HAS_STRCHR if strchr() and
1360 strrchr() are available for string searching.
1361
1362d_strcoll (d_strcoll.U):
1363 This variable conditionally defines HAS_STRCOLL if strcoll() is
1364 available to compare strings using collating information.
1365
1366d_strctcpy (d_strctcpy.U):
1367 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1368 indicates to the C program that this C compiler knows how to copy
1369 structures.
1370
1371d_strerrm (d_strerror.U):
1372 This variable holds what Strerrr is defined as to translate an error
1373 code condition into an error message string. It could be 'strerror'
1374 or a more complex macro emulating strrror with sys_errlist[], or the
1375 "unknown" string when both strerror and sys_errlist are missing.
1376
1377d_strerror (d_strerror.U):
1378 This variable conditionally defines HAS_STRERROR if strerror() is
1379 available to translate error numbers to strings.
1380
1381d_strtod (d_strtod.U):
1382 This variable conditionally defines the HAS_STRTOD symbol, which
1383 indicates to the C program that the strtod() routine is available
1384 to provide better numeric string conversion than atof().
1385
1386d_strtol (d_strtol.U):
1387 This variable conditionally defines the HAS_STRTOL symbol, which
1388 indicates to the C program that the strtol() routine is available
1389 to provide better numeric string conversion than atoi() and friends.
1390
1391d_strtoul (d_strtoul.U):
1392 This variable conditionally defines the HAS_STRTOUL symbol, which
1393 indicates to the C program that the strtoul() routine is available
1394 to provide conversion of strings to unsigned long.
1395
11dc3f68
JH
1396d_strtoull (strtoull.U):
1397 This variable conditionally defines the HAS_STRTOULL symbol, which
1398 indicates to the C program that the strtoull() routine is available.
1399
781b178c
JH
1400d_strxfrm (d_strxfrm.U):
1401 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1402 available to transform strings.
1403
1404d_suidsafe (d_dosuid.U):
1405 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1406 if setuid scripts can be secure. This test looks in /dev/fd/.
1407
1408d_symlink (d_symlink.U):
1409 This variable conditionally defines the HAS_SYMLINK symbol, which
1410 indicates to the C program that the symlink() routine is available
1411 to create symbolic links.
1412
1413d_syscall (d_syscall.U):
1414 This variable conditionally defines HAS_SYSCALL if syscall() is
1415 available call arbitrary system calls.
1416
1417d_sysconf (d_sysconf.U):
1418 This variable conditionally defines the HAS_SYSCONF symbol, which
1419 indicates to the C program that the sysconf() routine is available
1420 to determine system related limits and options.
1421
1422d_sysernlst (d_strerror.U):
1423 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1424 is available to translate error numbers to the symbolic name.
1425
1426d_syserrlst (d_strerror.U):
1427 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1428 available to translate error numbers to strings.
1429
1430d_system (d_system.U):
1431 This variable conditionally defines HAS_SYSTEM if system() is
1432 available to issue a shell command.
1433
1434d_tcgetpgrp (d_tcgtpgrp.U):
1435 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1436 indicates to the C program that the tcgetpgrp() routine is available.
1437 to get foreground process group ID.
1438
1439d_tcsetpgrp (d_tcstpgrp.U):
1440 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1441 indicates to the C program that the tcsetpgrp() routine is available
1442 to set foreground process group ID.
1443
781b178c
JH
1444d_telldir (d_readdir.U):
1445 This variable conditionally defines HAS_TELLDIR if telldir() is
1446 available.
1447
1448d_telldirproto (d_telldirproto.U):
1449 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1450 which indicates to the C program that the system provides
1451 a prototype for the telldir() function. Otherwise, it is
1452 up to the program to supply one.
1453
1454d_time (d_time.U):
1455 This variable conditionally defines the HAS_TIME symbol, which indicates
1456 that the time() routine exists. The time() routine is normaly
1457 provided on UNIX systems.
1458
1459d_times (d_times.U):
1460 This variable conditionally defines the HAS_TIMES symbol, which indicates
1461 that the times() routine exists. The times() routine is normaly
1462 provided on UNIX systems. You may have to include <sys/times.h>.
1463
781b178c
JH
1464d_truncate (d_truncate.U):
1465 This variable conditionally defines HAS_TRUNCATE if truncate() is
1466 available to truncate files.
1467
1468d_tzname (d_tzname.U):
1469 This variable conditionally defines HAS_TZNAME if tzname[] is
1470 available to access timezone names.
1471
1472d_umask (d_umask.U):
1473 This variable conditionally defines the HAS_UMASK symbol, which
1474 indicates to the C program that the umask() routine is available.
1475 to set and get the value of the file creation mask.
1476
1477d_uname (d_gethname.U):
1478 This variable conditionally defines the HAS_UNAME symbol, which
1479 indicates to the C program that the uname() routine may be
1480 used to derive the host name.
1481
1482d_union_semun (d_union_semun.U):
1483 This variable conditionally defines HAS_UNION_SEMUN if the
1484 union semun is defined by including <sys/sem.h>.
1485
0545a864
JH
1486d_ustat (d_ustat.U):
1487 This variable conditionally defines HAS_USTAT if ustat() is
1488 available to query file system statistics by dev_t.
1489
0617aed7
JH
1490d_vendorbin (vendorbin.U):
1491 This variable conditionally defines PERL_VENDORBIN.
1492
a3635516
JH
1493d_vendorlib (vendorlib.U):
1494 This variable conditionally defines PERL_VENDORLIB.
1495
781b178c
JH
1496d_vfork (d_vfork.U):
1497 This variable conditionally defines the HAS_VFORK symbol, which
1498 indicates the vfork() routine is available.
1499
1500d_void_closedir (d_closedir.U):
1501 This variable conditionally defines VOID_CLOSEDIR if closedir()
1502 does not return a value.
1503
1504d_voidsig (d_voidsig.U):
1505 This variable conditionally defines VOIDSIG if this system
1506 declares "void (*signal(...))()" in signal.h. The old way was to
1507 declare it as "int (*signal(...))()".
1508
1509d_voidtty (i_sysioctl.U):
1510 This variable conditionally defines USE_IOCNOTTY to indicate that the
1511 ioctl() call with TIOCNOTTY should be used to void tty association.
1512 Otherwise (on USG probably), it is enough to close the standard file
1513 decriptors and do a setpgrp().
1514
1515d_volatile (d_volatile.U):
1516 This variable conditionally defines the HASVOLATILE symbol, which
1517 indicates to the C program that this C compiler knows about the
1518 volatile declaration.
1519
1520d_vprintf (d_vprintf.U):
1521 This variable conditionally defines the HAS_VPRINTF symbol, which
1522 indicates to the C program that the vprintf() routine is available
1523 to printf with a pointer to an argument list.
1524
1525d_wait4 (d_wait4.U):
1526 This variable conditionally defines the HAS_WAIT4 symbol, which
1527 indicates the wait4() routine is available.
1528
1529d_waitpid (d_waitpid.U):
1530 This variable conditionally defines HAS_WAITPID if waitpid() is
1531 available to wait for child process.
1532
1533d_wcstombs (d_wcstombs.U):
1534 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1535 indicates to the C program that the wcstombs() routine is available
1536 to convert wide character strings to multibyte strings.
1537
1538d_wctomb (d_wctomb.U):
1539 This variable conditionally defines the HAS_WCTOMB symbol, which
1540 indicates to the C program that the wctomb() routine is available
1541 to convert a wide character to a multibyte.
1542
781b178c
JH
1543d_xenix (Guess.U):
1544 This variable conditionally defines the symbol XENIX, which alerts
1545 the C program that it runs under Xenix.
1546
1547date (Loc.U):
5bf26616 1548 This variable is used internally by Configure to determine the
781b178c
JH
1549 full pathname (if any) of the date program. After Configure runs,
1550 the value is reset to a plain "date" and is not useful.
1551
1552db_hashtype (i_db.U):
1553 This variable contains the type of the hash structure element
1554 in the <db.h> header file. In older versions of DB, it was
1555 int, while in newer ones it is u_int32_t.
1556
1557db_prefixtype (i_db.U):
1558 This variable contains the type of the prefix structure element
1559 in the <db.h> header file. In older versions of DB, it was
1560 int, while in newer ones it is size_t.
1561
1562defvoidused (voidflags.U):
1563 This variable contains the default value of the VOIDUSED symbol (15).
1564
1565direntrytype (i_dirent.U):
1566 This symbol is set to 'struct direct' or 'struct dirent' depending on
1567 whether dirent is available or not. You should use this pseudo type to
1568 portably declare your directory entries.
1569
1570dlext (dlext.U):
1571 This variable contains the extension that is to be used for the
1572 dynamically loaded modules that perl generaties.
1573
1574dlsrc (dlsrc.U):
1575 This variable contains the name of the dynamic loading file that
1576 will be used with the package.
1577
1578doublesize (doublesize.U):
1579 This variable contains the value of the DOUBLESIZE symbol, which
1580 indicates to the C program how many bytes there are in a double.
1581
1582drand01 (randfunc.U):
1583 Indicates the macro to be used to generate normalized
1584 random numbers. Uses randfunc, often divided by
1585 (double) (((unsigned long) 1 << randbits)) in order to
1586 normalize the result.
1587 In C programs, the macro 'Drand01' is mapped to drand01.
1588
1589dynamic_ext (Extensions.U):
1590 This variable holds a list of XS extension files we want to
1591 link dynamically into the package. It is used by Makefile.
1592
1593eagain (nblock_io.U):
1594 This variable bears the symbolic errno code set by read() when no
1595 data is present on the file and non-blocking I/O was enabled (otherwise,
1596 read() blocks naturally).
1597
1598ebcdic (ebcdic.U):
1599 This variable conditionally defines EBCDIC if this
1600 system uses EBCDIC encoding. Among other things, this
1601 means that the character ranges are not contiguous.
1602 See trnl.U
1603
1604echo (Loc.U):
5bf26616 1605 This variable is used internally by Configure to determine the
781b178c
JH
1606 full pathname (if any) of the echo program. After Configure runs,
1607 the value is reset to a plain "echo" and is not useful.
1608
1609egrep (Loc.U):
5bf26616 1610 This variable is used internally by Configure to determine the
781b178c
JH
1611 full pathname (if any) of the egrep program. After Configure runs,
1612 the value is reset to a plain "egrep" and is not useful.
1613
1614emacs (Loc.U):
1615 This variable is defined but not used by Configure.
1616 The value is a plain '' and is not useful.
1617
1618eunicefix (Init.U):
1619 When running under Eunice this variable contains a command which will
1620 convert a shell script to the proper form of text file for it to be
1621 executable by the shell. On other systems it is a no-op.
1622
1623exe_ext (Unix.U):
1624 This is an old synonym for _exe.
1625
1626expr (Loc.U):
5bf26616 1627 This variable is used internally by Configure to determine the
781b178c
JH
1628 full pathname (if any) of the expr program. After Configure runs,
1629 the value is reset to a plain "expr" and is not useful.
1630
1631extensions (Extensions.U):
1632 This variable holds a list of all extension files (both XS and
1633 non-xs linked into the package. It is propagated to Config.pm
1634 and is typically used to test whether a particular extesion
1635 is available.
1636
887d2938
JH
1637fflushNULL (fflushall.U):
1638 This symbol, if defined, tells that fflush(NULL) does flush
1639 all pending stdio output.
1640
781b178c
JH
1641fflushall (fflushall.U):
1642 This symbol, if defined, tells that to flush
1643 all pending stdio output one must loop through all
1644 the stdio file handles stored in an array and fflush them.
1645 Note that if fflushNULL is defined, fflushall will not
1646 even be probed for and will be left undefined.
1647
781b178c
JH
1648find (Loc.U):
1649 This variable is defined but not used by Configure.
1650 The value is a plain '' and is not useful.
1651
1652firstmakefile (Unix.U):
1653 This variable defines the first file searched by make. On unix,
1654 it is makefile (then Makefile). On case-insensitive systems,
1655 it might be something else. This is only used to deal with
1656 convoluted make depend tricks.
1657
1658flex (Loc.U):
1659 This variable is defined but not used by Configure.
1660 The value is a plain '' and is not useful.
1661
a22e52b9
JH
1662fpossize (fpossize.U):
1663 This variable contains the size of a fpostype in bytes.
1664
781b178c 1665fpostype (fpostype.U):
a22e52b9 1666 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
1667 uint, or whatever type is used to declare file positions in libc.
1668
1669freetype (mallocsrc.U):
1670 This variable contains the return type of free(). It is usually
1671 void, but occasionally int.
1672
1673full_ar (Loc_ar.U):
1674 This variable contains the full pathname to 'ar', whether or
1675 not the user has specified 'portability'. This is only used
1676 in the Makefile.SH.
1677
1678full_csh (d_csh.U):
1679 This variable contains the full pathname to 'csh', whether or
1680 not the user has specified 'portability'. This is only used
1681 in the compiled C program, and we assume that all systems which
1682 can share this executable will have the same full pathname to
1683 'csh.'
1684
1685full_sed (Loc_sed.U):
1686 This variable contains the full pathname to 'sed', whether or
1687 not the user has specified 'portability'. This is only used
1688 in the compiled C program, and we assume that all systems which
1689 can share this executable will have the same full pathname to
1690 'sed.'
1691
1692gccversion (cc.U):
1693 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1694 indicate whether the compiler is version 1 or 2. This is used in
1695 setting some of the default cflags. It is set to '' if not gcc.
1696
a22e52b9
JH
1697gidformat (gidf.U):
1698 This variable contains the format string used for printing a Gid_t.
1699
785fb66b
JH
1700gidsign (gidsign.U):
1701 This variable contains the signedness of a gidtype.
1702 1 for unsigned, -1 for signed.
1703
1704gidsize (gidsize.U):
1705 This variable contains the size of a gidtype in bytes.
1706
781b178c
JH
1707gidtype (gidtype.U):
1708 This variable defines Gid_t to be something like gid_t, int,
1709 ushort, or whatever type is used to declare the return type
1710 of getgid(). Typically, it is the type of group ids in the kernel.
1711
1712glibpth (libpth.U):
1713 This variable holds the general path (space-separated) used to
1714 find libraries. It may contain directories that do not exist on
1715 this platform, libpth is the cleaned-up version.
1716
1717grep (Loc.U):
5bf26616 1718 This variable is used internally by Configure to determine the
781b178c
JH
1719 full pathname (if any) of the grep program. After Configure runs,
1720 the value is reset to a plain "grep" and is not useful.
1721
1722groupcat (nis.U):
1723 This variable contains a command that produces the text of the
1724 /etc/group file. This is normally "cat /etc/group", but can be
1725 "ypcat group" when NIS is used.
1726
1727groupstype (groupstype.U):
1728 This variable defines Groups_t to be something like gid_t, int,
1729 ushort, or whatever type is used for the second argument to
1730 getgroups() and setgroups(). Usually, this is the same as
1731 gidtype (gid_t), but sometimes it isn't.
1732
1733gzip (Loc.U):
5bf26616 1734 This variable is used internally by Configure to determine the
781b178c
JH
1735 full pathname (if any) of the gzip program. After Configure runs,
1736 the value is reset to a plain "gzip" and is not useful.
1737
1738h_fcntl (h_fcntl.U):
1739 This is variable gets set in various places to tell i_fcntl that
1740 <fcntl.h> should be included.
1741
1742h_sysfile (h_sysfile.U):
1743 This is variable gets set in various places to tell i_sys_file that
1744 <sys/file.h> should be included.
1745
1746hint (Oldconfig.U):
1747 Gives the type of hints used for previous answers. May be one of
1748 "default", "recommended" or "previous".
1749
1750hostcat (nis.U):
1751 This variable contains a command that produces the text of the
1752 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1753 "ypcat hosts" when NIS is used.
1754
1755huge (models.U):
1756 This variable contains a flag which will tell the C compiler and loader
1757 to produce a program running with a huge memory model. If the
1758 huge model is not supported, contains the flag to produce large
1759 model programs. It is up to the Makefile to use this.
1760
a22e52b9
JH
1761i16size (perlxv.U):
1762 This variable is the size of an I16 in bytes.
1763
1764i16type (perlxv.U):
1765 This variable contains the C type used for Perl's I16.
1766
1767i32size (perlxv.U):
1768 This variable is the size of an I32 in bytes.
1769
1770i32type (perlxv.U):
1771 This variable contains the C type used for Perl's I32.
1772
1773i64size (perlxv.U):
1774 This variable is the size of an I64 in bytes.
1775
1776i64type (perlxv.U):
1777 This variable contains the C type used for Perl's I64.
1778
1779i8size (perlxv.U):
1780 This variable is the size of an I8 in bytes.
1781
1782i8type (perlxv.U):
1783 This variable contains the C type used for Perl's I8.
1784
781b178c
JH
1785i_arpainet (i_arpainet.U):
1786 This variable conditionally defines the I_ARPA_INET symbol,
1787 and indicates whether a C program should include <arpa/inet.h>.
1788
1789i_bsdioctl (i_sysioctl.U):
1790 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1791 indicates to the C program that <sys/bsdioctl.h> exists and should
1792 be included.
1793
1794i_db (i_db.U):
1795 This variable conditionally defines the I_DB symbol, and indicates
1796 whether a C program may include Berkeley's DB include file <db.h>.
1797
1798i_dbm (i_dbm.U):
1799 This variable conditionally defines the I_DBM symbol, which
1800 indicates to the C program that <dbm.h> exists and should
1801 be included.
1802
1803i_dirent (i_dirent.U):
1804 This variable conditionally defines I_DIRENT, which indicates
1805 to the C program that it should include <dirent.h>.
1806
1807i_dld (i_dld.U):
1808 This variable conditionally defines the I_DLD symbol, which
1809 indicates to the C program that <dld.h> (GNU dynamic loading)
1810 exists and should be included.
1811
1812i_dlfcn (i_dlfcn.U):
1813 This variable conditionally defines the I_DLFCN symbol, which
1814 indicates to the C program that <dlfcn.h> exists and should
1815 be included.
1816
1817i_fcntl (i_fcntl.U):
1818 This variable controls the value of I_FCNTL (which tells
1819 the C program to include <fcntl.h>).
1820
1821i_float (i_float.U):
1822 This variable conditionally defines the I_FLOAT symbol, and indicates
1823 whether a C program may include <float.h> to get symbols like DBL_MAX
1824 or DBL_MIN, i.e. machine dependent floating point values.
1825
1826i_gdbm (i_gdbm.U):
1827 This variable conditionally defines the I_GDBM symbol, which
1828 indicates to the C program that <gdbm.h> exists and should
1829 be included.
1830
1831i_grp (i_grp.U):
1832 This variable conditionally defines the I_GRP symbol, and indicates
1833 whether a C program should include <grp.h>.
1834
1835i_inttypes (i_inttypes.U):
1836 This variable conditionally defines the I_INTTYPES symbol,
1837 and indicates whether a C program should include <inttypes.h>.
1838
1839i_limits (i_limits.U):
1840 This variable conditionally defines the I_LIMITS symbol, and indicates
1841 whether a C program may include <limits.h> to get symbols like WORD_BIT
1842 and friends.
1843
1844i_locale (i_locale.U):
1845 This variable conditionally defines the I_LOCALE symbol,
1846 and indicates whether a C program should include <locale.h>.
1847
1848i_machcthr (i_machcthr.U):
1849 This variable conditionally defines the I_MACH_CTHREADS symbol,
1850 and indicates whether a C program should include <mach/cthreads.h>.
1851
1852i_malloc (i_malloc.U):
1853 This variable conditionally defines the I_MALLOC symbol, and indicates
1854 whether a C program should include <malloc.h>.
1855
1856i_math (i_math.U):
1857 This variable conditionally defines the I_MATH symbol, and indicates
1858 whether a C program may include <math.h>.
1859
1860i_memory (i_memory.U):
1861 This variable conditionally defines the I_MEMORY symbol, and indicates
1862 whether a C program should include <memory.h>.
1863
1864i_mntent (i_mntent.U):
1865 This variable conditionally defines the I_MNTENT symbol, and indicates
1866 whether a C program should include <mntent.h>.
1867
1868i_ndbm (i_ndbm.U):
1869 This variable conditionally defines the I_NDBM symbol, which
1870 indicates to the C program that <ndbm.h> exists and should
1871 be included.
1872
1873i_netdb (i_netdb.U):
1874 This variable conditionally defines the I_NETDB symbol, and indicates
1875 whether a C program should include <netdb.h>.
1876
1877i_neterrno (i_neterrno.U):
1878 This variable conditionally defines the I_NET_ERRNO symbol, which
1879 indicates to the C program that <net/errno.h> exists and should
1880 be included.
1881
1882i_netinettcp (i_netinettcp.U):
1883 This variable conditionally defines the I_NETINET_TCP symbol,
1884 and indicates whether a C program should include <netinet/tcp.h>.
1885
1886i_niin (i_niin.U):
1887 This variable conditionally defines I_NETINET_IN, which indicates
1888 to the C program that it should include <netinet/in.h>. Otherwise,
1889 you may try <sys/in.h>.
1890
1891i_poll (i_poll.U):
1892 This variable conditionally defines the I_POLL symbol, and indicates
1893 whether a C program should include <poll.h>.
1894
1895i_pthread (i_pthread.U):
190b66db 1896 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
1897 and indicates whether a C program should include <pthread.h>.
1898
1899i_pwd (i_pwd.U):
1900 This variable conditionally defines I_PWD, which indicates
1901 to the C program that it should include <pwd.h>.
1902
1903i_rpcsvcdbm (i_dbm.U):
1904 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1905 indicates to the C program that <rpcsvc/dbm.h> exists and should
1906 be included. Some System V systems might need this instead of <dbm.h>.
1907
1908i_sfio (i_sfio.U):
1909 This variable conditionally defines the I_SFIO symbol,
1910 and indicates whether a C program should include <sfio.h>.
1911
1912i_sgtty (i_termio.U):
1913 This variable conditionally defines the I_SGTTY symbol, which
1914 indicates to the C program that it should include <sgtty.h> rather
1915 than <termio.h>.
1916
1917i_shadow (i_shadow.U):
1918 This variable conditionally defines the I_SHADOW symbol, and indicates
1919 whether a C program should include <shadow.h>.
1920
1921i_socks (i_socks.U):
1922 This variable conditionally defines the I_SOCKS symbol, and indicates
1923 whether a C program should include <socks.h>.
1924
1925i_stdarg (i_varhdr.U):
1926 This variable conditionally defines the I_STDARG symbol, which
1927 indicates to the C program that <stdarg.h> exists and should
1928 be included.
1929
1930i_stddef (i_stddef.U):
1931 This variable conditionally defines the I_STDDEF symbol, which
1932 indicates to the C program that <stddef.h> exists and should
1933 be included.
1934
1935i_stdlib (i_stdlib.U):
1936 This variable conditionally defines the I_STDLIB symbol, which
1937 indicates to the C program that <stdlib.h> exists and should
1938 be included.
1939
1940i_string (i_string.U):
1941 This variable conditionally defines the I_STRING symbol, which
1942 indicates that <string.h> should be included rather than <strings.h>.
1943
1944i_sysaccess (i_sysaccess.U):
1945 This variable conditionally defines the I_SYS_ACCESS symbol,
1946 and indicates whether a C program should include <sys/access.h>.
1947
1948i_sysdir (i_sysdir.U):
1949 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1950 whether a C program should include <sys/dir.h>.
1951
1952i_sysfile (i_sysfile.U):
1953 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1954 whether a C program should include <sys/file.h> to get R_OK and friends.
1955
1956i_sysfilio (i_sysioctl.U):
1957 This variable conditionally defines the I_SYS_FILIO symbol, which
1958 indicates to the C program that <sys/filio.h> exists and should
1959 be included in preference to <sys/ioctl.h>.
1960
1961i_sysin (i_niin.U):
1962 This variable conditionally defines I_SYS_IN, which indicates
1963 to the C program that it should include <sys/in.h> instead of
1964 <netinet/in.h>.
1965
1966i_sysioctl (i_sysioctl.U):
1967 This variable conditionally defines the I_SYS_IOCTL symbol, which
1968 indicates to the C program that <sys/ioctl.h> exists and should
1969 be included.
1970
781b178c
JH
1971i_sysmount (i_sysmount.U):
1972 This variable conditionally defines the I_SYSMOUNT symbol,
1973 and indicates whether a C program should include <sys/mount.h>.
1974
1975i_sysndir (i_sysndir.U):
1976 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1977 whether a C program should include <sys/ndir.h>.
1978
1979i_sysparam (i_sysparam.U):
1980 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1981 whether a C program should include <sys/param.h>.
1982
1983i_sysresrc (i_sysresrc.U):
1984 This variable conditionally defines the I_SYS_RESOURCE symbol,
1985 and indicates whether a C program should include <sys/resource.h>.
1986
1987i_syssecrt (i_syssecrt.U):
1988 This variable conditionally defines the I_SYS_SECURITY symbol,
1989 and indicates whether a C program should include <sys/security.h>.
1990
1991i_sysselct (i_sysselct.U):
1992 This variable conditionally defines I_SYS_SELECT, which indicates
1993 to the C program that it should include <sys/select.h> in order to
1994 get the definition of struct timeval.
1995
1996i_syssockio (i_sysioctl.U):
1997 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1998 C program that socket ioctl codes may be found in <sys/sockio.h>
1999 instead of <sys/ioctl.h>.
2000
2001i_sysstat (i_sysstat.U):
2002 This variable conditionally defines the I_SYS_STAT symbol,
2003 and indicates whether a C program should include <sys/stat.h>.
2004
0545a864
JH
2005i_sysstatfs (i_sysstatfs.U):
2006 This variable conditionally defines the I_SYSSTATFS symbol,
2007 and indicates whether a C program should include <sys/statfs.h>.
2008
781b178c
JH
2009i_sysstatvfs (i_sysstatvfs.U):
2010 This variable conditionally defines the I_SYSSTATVFS symbol,
2011 and indicates whether a C program should include <sys/statvfs.h>.
2012
2013i_systime (i_time.U):
2014 This variable conditionally defines I_SYS_TIME, which indicates
2015 to the C program that it should include <sys/time.h>.
2016
2017i_systimek (i_time.U):
2018 This variable conditionally defines I_SYS_TIME_KERNEL, which
2019 indicates to the C program that it should include <sys/time.h>
2020 with KERNEL defined.
2021
2022i_systimes (i_systimes.U):
2023 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2024 whether a C program should include <sys/times.h>.
2025
2026i_systypes (i_systypes.U):
2027 This variable conditionally defines the I_SYS_TYPES symbol,
2028 and indicates whether a C program should include <sys/types.h>.
2029
2030i_sysuio (i_sysuio.U):
2031 This variable conditionally defines the I_SYSUIO symbol, and indicates
2032 whether a C program should include <sys/uio.h>.
2033
2034i_sysun (i_sysun.U):
2035 This variable conditionally defines I_SYS_UN, which indicates
2036 to the C program that it should include <sys/un.h> to get UNIX
2037 domain socket definitions.
2038
0545a864
JH
2039i_sysvfs (i_sysvfs.U):
2040 This variable conditionally defines the I_SYSVFS symbol,
2041 and indicates whether a C program should include <sys/vfs.h>.
2042
781b178c
JH
2043i_syswait (i_syswait.U):
2044 This variable conditionally defines I_SYS_WAIT, which indicates
2045 to the C program that it should include <sys/wait.h>.
2046
2047i_termio (i_termio.U):
2048 This variable conditionally defines the I_TERMIO symbol, which
2049 indicates to the C program that it should include <termio.h> rather
2050 than <sgtty.h>.
2051
2052i_termios (i_termio.U):
2053 This variable conditionally defines the I_TERMIOS symbol, which
2054 indicates to the C program that the POSIX <termios.h> file is
2055 to be included.
2056
2057i_time (i_time.U):
2058 This variable conditionally defines I_TIME, which indicates
2059 to the C program that it should include <time.h>.
2060
2061i_unistd (i_unistd.U):
2062 This variable conditionally defines the I_UNISTD symbol, and indicates
2063 whether a C program should include <unistd.h>.
2064
0545a864
JH
2065i_ustat (i_ustat.U):
2066 This variable conditionally defines the I_USTAT symbol, and indicates
2067 whether a C program should include <ustat.h>.
2068
781b178c
JH
2069i_utime (i_utime.U):
2070 This variable conditionally defines the I_UTIME symbol, and indicates
2071 whether a C program should include <utime.h>.
2072
2073i_values (i_values.U):
2074 This variable conditionally defines the I_VALUES symbol, and indicates
2075 whether a C program may include <values.h> to get symbols like MAXLONG
2076 and friends.
2077
2078i_varargs (i_varhdr.U):
2079 This variable conditionally defines I_VARARGS, which indicates
2080 to the C program that it should include <varargs.h>.
2081
2082i_varhdr (i_varhdr.U):
2083 Contains the name of the header to be included to get va_dcl definition.
2084 Typically one of varargs.h or stdarg.h.
2085
2086i_vfork (i_vfork.U):
2087 This variable conditionally defines the I_VFORK symbol, and indicates
2088 whether a C program should include vfork.h.
2089
2090ignore_versioned_solibs (libs.U):
2091 This variable should be non-empty if non-versioned shared
2092 libraries (libfoo.so.x.y) are to be ignored (because they
2093 cannot be linked against).
2094
2095incpath (usrinc.U):
2096 This variable must preceed the normal include path to get hte
2097 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2098 Value can be "" or "/bsd43" on mips.
2099
2100inews (Loc.U):
2101 This variable is defined but not used by Configure.
2102 The value is a plain '' and is not useful.
2103
2104installarchlib (archlib.U):
2105 This variable is really the same as archlibexp but may differ on
2106 those systems using AFS. For extra portability, only this variable
2107 should be used in makefiles.
2108
2109installbin (bin.U):
2110 This variable is the same as binexp unless AFS is running in which case
2111 the user is explicitely prompted for it. This variable should always
2112 be used in your makefiles for maximum portability.
2113
2114installman1dir (man1dir.U):
2115 This variable is really the same as man1direxp, unless you are using
2116 AFS in which case it points to the read/write location whereas
2117 man1direxp only points to the read-only access location. For extra
2118 portability, you should only use this variable within your makefiles.
2119
2120installman3dir (man3dir.U):
2121 This variable is really the same as man3direxp, unless you are using
2122 AFS in which case it points to the read/write location whereas
2123 man3direxp only points to the read-only access location. For extra
2124 portability, you should only use this variable within your makefiles.
2125
2126installprefix (installprefix.U):
2127 This variable holds the name of the directory below which
2128 "make install" will install the package. For most users, this
2129 is the same as prefix. However, it is useful for
2130 installing the software into a different (usually temporary)
2131 location after which it can be bundled up and moved somehow
2132 to the final location specified by prefix.
2133
2134installprefixexp (installprefix.U):
2135 This variable holds the full absolute path of installprefix
2136 with all ~-expansion done.
2137
2138installprivlib (privlib.U):
2139 This variable is really the same as privlibexp but may differ on
2140 those systems using AFS. For extra portability, only this variable
2141 should be used in makefiles.
2142
2143installscript (scriptdir.U):
2144 This variable is usually the same as scriptdirexp, unless you are on
2145 a system running AFS, in which case they may differ slightly. You
2146 should always use this variable within your makefiles for portability.
2147
2148installsitearch (sitearch.U):
2149 This variable is really the same as sitearchexp but may differ on
2150 those systems using AFS. For extra portability, only this variable
2151 should be used in makefiles.
2152
0617aed7
JH
2153installsitebin (sitebin.U):
2154 This variable is usually the same as sitebinexp, unless you are on
2155 a system running AFS, in which case they may differ slightly. You
2156 should always use this variable within your makefiles for portability.
2157
781b178c
JH
2158installsitelib (sitelib.U):
2159 This variable is really the same as sitelibexp but may differ on
2160 those systems using AFS. For extra portability, only this variable
2161 should be used in makefiles.
2162
2163installstyle (installstyle.U):
2164 This variable describes the "style" of the perl installation.
2165 This is intended to be useful for tools that need to
2166 manipulate entire perl distributions. Perl itself doesn't use
2167 this to find its libraries -- the library directories are
2168 stored directly in Config.pm. Currently, there are only two
2169 styles: "lib" and "lib/perl5". The default library locations
2170 (e.g. privlib, sitelib) are either $prefix/lib or
2171 $prefix/lib/perl5. The former is useful if $prefix is a
2172 directory dedicated to perl (e.g. /opt/perl), while the latter
2173 is useful if $prefix is shared by many packages, e.g. if
2174 $prefix=/usr/local.
2175 This may later be extended to include other information, so
2176 be careful with pattern-matching on the results.
2177 For compatibility with perl5.005 and earlier, the default
2178 setting is based on whether or not $prefix contains the string
2179 "perl".
2180
2181installusrbinperl (instubperl.U):
2182 This variable tells whether Perl should be installed also as
2183 /usr/bin/perl in addition to
2184 $installbin/perl
2185
0617aed7
JH
2186installvendorbin (vendorbin.U):
2187 This variable is really the same as vendorbinexp but may differ on
2188 those systems using AFS. For extra portability, only this variable
2189 should be used in makefiles.
2190
a3635516
JH
2191installvendorlib (vendorlib.U):
2192 This variable is really the same as vendorlibexp but may differ on
2193 those systems using AFS. For extra portability, only this variable
2194 should be used in makefiles.
2195
781b178c
JH
2196intsize (intsize.U):
2197 This variable contains the value of the INTSIZE symbol, which
2198 indicates to the C program how many bytes there are in an int.
2199
a22e52b9
JH
2200ivdformat (perlxvf.U):
2201 This variable contains the format string used for printing
2202 a Perl IV as a signed decimal integer.
2203
2204ivsize (perlxv.U):
2205 This variable is the size of an IV in bytes.
2206
2207ivtype (perlxv.U):
2208 This variable contains the C type used for Perl's IV.
2209
781b178c
JH
2210known_extensions (Extensions.U):
2211 This variable holds a list of all XS extensions included in
2212 the package.
2213
2214ksh (Loc.U):
2215 This variable is defined but not used by Configure.
2216 The value is a plain '' and is not useful.
2217
2218large (models.U):
2219 This variable contains a flag which will tell the C compiler and loader
2220 to produce a program running with a large memory model. It is up to
2221 the Makefile to use this.
2222
2223ld (dlsrc.U):
2224 This variable indicates the program to be used to link
2225 libraries for dynamic loading. On some systems, it is 'ld'.
2226 On ELF systems, it should be $cc. Mostly, we'll try to respect
2227 the hint file setting.
2228
2229lddlflags (dlsrc.U):
2230 This variable contains any special flags that might need to be
2231 passed to $ld to create a shared library suitable for dynamic
2232 loading. It is up to the makefile to use it. For hpux, it
2233 should be '-b'. For sunos 4.1, it is empty.
2234
2235ldflags (ccflags.U):
2236 This variable contains any additional C loader flags desired by
2237 the user. It is up to the Makefile to use this.
2238
2239ldlibpthname (libperl.U):
2240 This variable holds the name of the shared library
2241 search path, often LD_LIBRARY_PATH. To get an empty
2242 string, the hints file must set this to 'none'.
2243
2244less (Loc.U):
5bf26616 2245 This variable is used internally by Configure to determine the
781b178c
JH
2246 full pathname (if any) of the less program. After Configure runs,
2247 the value is reset to a plain "less" and is not useful.
2248
2249lib_ext (Unix.U):
2250 This is an old synonym for _a.
2251
2252libc (libc.U):
2253 This variable contains the location of the C library.
2254
2255libperl (libperl.U):
2256 The perl executable is obtained by linking perlmain.c with
2257 libperl, any static extensions (usually just DynaLoader),
2258 and any other libraries needed on this system. libperl
2259 is usually libperl.a, but can also be libperl.so.xxx if
2260 the user wishes to build a perl executable with a shared
2261 library.
2262
2263libpth (libpth.U):
2264 This variable holds the general path (space-separated) used to find
2265 libraries. It is intended to be used by other units.
2266
2267libs (libs.U):
2268 This variable holds the additional libraries we want to use.
2269 It is up to the Makefile to deal with it.
2270
2271libswanted (Myinit.U):
2272 This variable holds a list of all the libraries we want to
2273 search. The order is chosen to pick up the c library
2274 ahead of ucb or bsd libraries for SVR4.
2275
2276line (Loc.U):
2277 This variable is defined but not used by Configure.
2278 The value is a plain '' and is not useful.
2279
2280lint (Loc.U):
2281 This variable is defined but not used by Configure.
2282 The value is a plain '' and is not useful.
2283
2284lkflags (ccflags.U):
2285 This variable contains any additional C partial linker flags desired by
2286 the user. It is up to the Makefile to use this.
2287
2288ln (Loc.U):
5bf26616 2289 This variable is used internally by Configure to determine the
781b178c
JH
2290 full pathname (if any) of the ln program. After Configure runs,
2291 the value is reset to a plain "ln" and is not useful.
2292
2293lns (lns.U):
2294 This variable holds the name of the command to make
2295 symbolic links (if they are supported). It can be used
2296 in the Makefile. It is either 'ln -s' or 'ln'
2297
2298locincpth (ccflags.U):
2299 This variable contains a list of additional directories to be
2300 searched by the compiler. The appropriate '-I' directives will
2301 be added to ccflags. This is intended to simplify setting
2302 local directories from the Configure command line.
2303 It's not much, but it parallels the loclibpth stuff in libpth.U.
2304
2305loclibpth (libpth.U):
2306 This variable holds the paths (space-separated) used to find local
2307 libraries. It is prepended to libpth, and is intended to be easily
2308 set from the command line.
2309
2310longdblsize (d_longdbl.U):
2311 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2312 indicates to the C program how many bytes there are in a long double,
2313 if this system supports long doubles.
2314
2315longlongsize (d_longlong.U):
2316 This variable contains the value of the LONGLONGSIZE symbol, which
2317 indicates to the C program how many bytes there are in a long long,
2318 if this system supports long long.
2319
2320longsize (intsize.U):
2321 This variable contains the value of the LONGSIZE symbol, which
2322 indicates to the C program how many bytes there are in a long.
2323
2324lp (Loc.U):
2325 This variable is defined but not used by Configure.
2326 The value is a plain '' and is not useful.
2327
2328lpr (Loc.U):
2329 This variable is defined but not used by Configure.
2330 The value is a plain '' and is not useful.
2331
2332ls (Loc.U):
5bf26616 2333 This variable is used internally by Configure to determine the
781b178c
JH
2334 full pathname (if any) of the ls program. After Configure runs,
2335 the value is reset to a plain "ls" and is not useful.
2336
2337lseeksize (lseektype.U):
2338 This variable defines lseektype to be something like off_t, long,
2339 or whatever type is used to declare lseek offset's type in the
2340 kernel (which also appears to be lseek's return type).
2341
2342lseektype (lseektype.U):
2343 This variable defines lseektype to be something like off_t, long,
2344 or whatever type is used to declare lseek offset's type in the
2345 kernel (which also appears to be lseek's return type).
2346
2347mail (Loc.U):
2348 This variable is defined but not used by Configure.
2349 The value is a plain '' and is not useful.
2350
2351mailx (Loc.U):
2352 This variable is defined but not used by Configure.
2353 The value is a plain '' and is not useful.
2354
2355make (Loc.U):
5bf26616 2356 This variable is used internally by Configure to determine the
781b178c
JH
2357 full pathname (if any) of the make program. After Configure runs,
2358 the value is reset to a plain "make" and is not useful.
2359
2360make_set_make (make.U):
2361 Some versions of 'make' set the variable MAKE. Others do not.
2362 This variable contains the string to be included in Makefile.SH
2363 so that MAKE is set if needed, and not if not needed.
2364 Possible values are:
2365 make_set_make='#' # If your make program handles this for you,
2366 make_set_make="MAKE=$make" # if it doesn't.
2367 I used a comment character so that we can distinguish a
2368 'set' value (from a previous config.sh or Configure '-D' option)
2369 from an uncomputed value.
2370
2371mallocobj (mallocsrc.U):
2372 This variable contains the name of the malloc.o that this package
2373 generates, if that malloc.o is preferred over the system malloc.
2374 Otherwise the value is null. This variable is intended for generating
2375 Makefiles. See mallocsrc.
2376
2377mallocsrc (mallocsrc.U):
2378 This variable contains the name of the malloc.c that comes with
2379 the package, if that malloc.c is preferred over the system malloc.
2380 Otherwise the value is null. This variable is intended for generating
2381 Makefiles.
2382
2383malloctype (mallocsrc.U):
2384 This variable contains the kind of ptr returned by malloc and realloc.
2385
2386man1dir (man1dir.U):
2387 This variable contains the name of the directory in which manual
2388 source pages are to be put. It is the responsibility of the
2389 Makefile.SH to get the value of this into the proper command.
2390 You must be prepared to do the ~name expansion yourself.
2391
2392man1direxp (man1dir.U):
2393 This variable is the same as the man1dir variable, but is filename
2394 expanded at configuration time, for convenient use in makefiles.
2395
2396man1ext (man1dir.U):
2397 This variable contains the extension that the manual page should
2398 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2399 See man1dir.
2400
2401man3dir (man3dir.U):
2402 This variable contains the name of the directory in which manual
2403 source pages are to be put. It is the responsibility of the
2404 Makefile.SH to get the value of this into the proper command.
2405 You must be prepared to do the ~name expansion yourself.
2406
2407man3direxp (man3dir.U):
2408 This variable is the same as the man3dir variable, but is filename
2409 expanded at configuration time, for convenient use in makefiles.
2410
2411man3ext (man3dir.U):
2412 This variable contains the extension that the manual page should
2413 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2414 See man3dir.
2415
781b178c
JH
2416medium (models.U):
2417 This variable contains a flag which will tell the C compiler and loader
2418 to produce a program running with a medium memory model. If the
2419 medium model is not supported, contains the flag to produce large
2420 model programs. It is up to the Makefile to use this.
2421
2422mips_type (usrinc.U):
2423 This variable holds the environment type for the mips system.
2424 Possible values are "BSD 4.3" and "System V".
2425
2426mkdir (Loc.U):
5bf26616 2427 This variable is used internally by Configure to determine the
781b178c
JH
2428 full pathname (if any) of the mkdir program. After Configure runs,
2429 the value is reset to a plain "mkdir" and is not useful.
2430
781b178c
JH
2431models (models.U):
2432 This variable contains the list of memory models supported by this
2433 system. Possible component values are none, split, unsplit, small,
2434 medium, large, and huge. The component values are space separated.
2435
2436modetype (modetype.U):
2437 This variable defines modetype to be something like mode_t,
2438 int, unsigned short, or whatever type is used to declare file
2439 modes for system calls.
2440
2441more (Loc.U):
5bf26616 2442 This variable is used internally by Configure to determine the
781b178c
JH
2443 full pathname (if any) of the more program. After Configure runs,
2444 the value is reset to a plain "more" and is not useful.
2445
2446multiarch (multiarch.U):
2447 This variable conditionally defines the MULTIARCH symbol
2448 which signifies the presence of multiplatform files.
2449 This is normally set by hints files.
2450
2451mv (Loc.U):
2452 This variable is defined but not used by Configure.
2453 The value is a plain '' and is not useful.
2454
2455myarchname (archname.U):
2456 This variable holds the architecture name computed by Configure in
2457 a previous run. It is not intended to be perused by any user and
2458 should never be set in a hint file.
2459
2460mydomain (myhostname.U):
2461 This variable contains the eventual value of the MYDOMAIN symbol,
2462 which is the domain of the host the program is going to run on.
2463 The domain must be appended to myhostname to form a complete host name.
2464 The dot comes with mydomain, and need not be supplied by the program.
2465
2466myhostname (myhostname.U):
2467 This variable contains the eventual value of the MYHOSTNAME symbol,
2468 which is the name of the host the program is going to run on.
2469 The domain is not kept with hostname, but must be gotten from mydomain.
2470 The dot comes with mydomain, and need not be supplied by the program.
2471
2472myuname (Oldconfig.U):
2473 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2474 pseudo variables assignments in the output are stripped, thank you. The
2475 whole thing is then lower-cased.
2476
2477n (n.U):
2478 This variable contains the '-n' flag if that is what causes the echo
2479 command to suppress newline. Otherwise it is null. Correct usage is
2480 $echo $n "prompt for a question: $c".
2481
2482netdb_hlen_type (netdbtype.U):
2483 This variable holds the type used for the 2nd argument to
2484 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2485 This is only useful if you have gethostbyaddr(), naturally.
2486
2487netdb_host_type (netdbtype.U):
2488 This variable holds the type used for the 1st argument to
2489 gethostbyaddr(). Usually, this is char * or void *, possibly
2490 with or without a const prefix.
2491 This is only useful if you have gethostbyaddr(), naturally.
2492
2493netdb_name_type (netdbtype.U):
2494 This variable holds the type used for the argument to
2495 gethostbyname(). Usually, this is char * or const char *.
2496 This is only useful if you have gethostbyname(), naturally.
2497
2498netdb_net_type (netdbtype.U):
2499 This variable holds the type used for the 1st argument to
2500 getnetbyaddr(). Usually, this is int or long.
2501 This is only useful if you have getnetbyaddr(), naturally.
2502
2503nm (Loc.U):
5bf26616 2504 This variable is used internally by Configure to determine the
781b178c
JH
2505 full pathname (if any) of the nm program. After Configure runs,
2506 the value is reset to a plain "nm" and is not useful.
2507
2508nm_opt (usenm.U):
2509 This variable holds the options that may be necessary for nm.
2510
2511nm_so_opt (usenm.U):
2512 This variable holds the options that may be necessary for nm
2513 to work on a shared library but that can not be used on an
2514 archive library. Currently, this is only used by Linux, where
2515 nm --dynamic is *required* to get symbols from an ELF library which
2516 has been stripped, but nm --dynamic is *fatal* on an archive library.
2517 Maybe Linux should just always set usenm=false.
2518
2519nonxs_ext (Extensions.U):
2520 This variable holds a list of all non-xs extensions included
2521 in the package. All of them will be built.
2522
2523nroff (Loc.U):
5bf26616 2524 This variable is used internally by Configure to determine the
781b178c
JH
2525 full pathname (if any) of the nroff program. After Configure runs,
2526 the value is reset to a plain "nroff" and is not useful.
2527
a22e52b9
JH
2528nvsize (perlxv.U):
2529 This variable is the size of an NV in bytes.
2530
2531nvtype (perlxv.U):
2532 This variable contains the C type used for Perl's NV.
2533
781b178c
JH
2534o_nonblock (nblock_io.U):
2535 This variable bears the symbol value to be used during open() or fcntl()
2536 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2537 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2538 but that is only supported by some devices.
2539
2540obj_ext (Unix.U):
2541 This is an old synonym for _o.
2542
2543old_pthread_create_joinable (d_pthrattrj.U):
2544 This variable defines the constant to use for creating joinable
2545 (aka undetached) pthreads. Unused if pthread.h defines
2546 PTHREAD_CREATE_JOINABLE. If used, possible values are
2547 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2548
2549optimize (ccflags.U):
2550 This variable contains any optimizer/debugger flag that should be used.
2551 It is up to the Makefile to use it.
2552
2553orderlib (orderlib.U):
2554 This variable is "true" if the components of libraries must be ordered
2555 (with `lorder $* | tsort`) before placing them in an archive. Set to
2556 "false" if ranlib or ar can generate random libraries.
2557
2558osname (Oldconfig.U):
2559 This variable contains the operating system name (e.g. sunos,
2560 solaris, hpux, etc.). It can be useful later on for setting
2561 defaults. Any spaces are replaced with underscores. It is set
2562 to a null string if we can't figure it out.
2563
2564osvers (Oldconfig.U):
2565 This variable contains the operating system version (e.g.
2566 4.1.3, 5.2, etc.). It is primarily used for helping select
2567 an appropriate hints file, but might be useful elsewhere for
2568 setting defaults. It is set to '' if we can't figure it out.
2569 We try to be flexible about how much of the version number
2570 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2571 same for this package, hints files might just be os_4.0 or
2572 os_4.1, etc., not keeping separate files for each little release.
2573
2574package (package.U):
2575 This variable contains the name of the package being constructed.
2576 It is primarily intended for the use of later Configure units.
2577
2578pager (pager.U):
2579 This variable contains the name of the preferred pager on the system.
2580 Usual values are (the full pathnames of) more, less, pg, or cat.
2581
2582passcat (nis.U):
2583 This variable contains a command that produces the text of the
2584 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2585 "ypcat passwd" when NIS is used.
2586
2587patchlevel (patchlevel.U):
2588 The patchlevel level of this package.
2589 The value of patchlevel comes from the patchlevel.h file.
2590
2591path_sep (Unix.U):
2592 This is an old synonym for p_ in Head.U, the character
2593 used to separate elements in the command shell search PATH.
2594
2595perl (Loc.U):
2596 This variable is defined but not used by Configure.
2597 The value is a plain '' and is not useful.
2598
2599perladmin (perladmin.U):
2600 Electronic mail address of the perl5 administrator.
2601
2602perlpath (perlpath.U):
2603 This variable contains the eventual value of the PERLPATH symbol,
2604 which contains the name of the perl interpreter to be used in
2605 shell scripts and in the "eval 'exec'" idiom.
2606
2607pg (Loc.U):
5bf26616 2608 This variable is used internally by Configure to determine the
781b178c
JH
2609 full pathname (if any) of the pg program. After Configure runs,
2610 the value is reset to a plain "pg" and is not useful.
2611
2612phostname (myhostname.U):
2613 This variable contains the eventual value of the PHOSTNAME symbol,
2614 which is a command that can be fed to popen() to get the host name.
2615 The program should probably not presume that the domain is or isn't
2616 there already.
2617
2618pidtype (pidtype.U):
2619 This variable defines PIDTYPE to be something like pid_t, int,
2620 ushort, or whatever type is used to declare process ids in the kernel.
2621
2622plibpth (libpth.U):
2623 Holds the private path used by Configure to find out the libraries.
2624 Its value is prepend to libpth. This variable takes care of special
2625 machines, like the mips. Usually, it should be empty.
2626
75347591
JH
2627pm_apiversion (xs_apiversion.U):
2628 This variable contains the version of the oldest perl
2629 compatible with the present perl. (That is, pure perl modules
2630 written for $pm_apiversion will still work for the current
2631 version). perl.c:incpush() and lib/lib.pm will automatically
2632 search in $sitelib for older directories across major versions
2633 back to pm_apiversion. This is only useful if you have a perl
2634 library directory tree structured like the default one. The
2635 versioned site_perl library was introduced in 5.005, so that's
2636 the default setting for this variable. It's hard to imagine
2637 it changing before Perl6. It is included here for symmetry
2638 with xs_apiveprsion -- the searching algorithms will
2639 (presumably) be similar.
2640 See the INSTALL file for how this works.
2641
781b178c
JH
2642pmake (Loc.U):
2643 This variable is defined but not used by Configure.
2644 The value is a plain '' and is not useful.
2645
2646pr (Loc.U):
2647 This variable is defined but not used by Configure.
2648 The value is a plain '' and is not useful.
2649
2650prefix (prefix.U):
2651 This variable holds the name of the directory below which the
2652 user will install the package. Usually, this is /usr/local, and
2653 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2654 man pages in /usr/local/man, etc. It is only used to set defaults
2655 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2656
2657prefixexp (prefix.U):
2658 This variable holds the full absolute path of the directory below
2659 which the user will install the package. Derived from prefix.
2660
2661privlib (privlib.U):
2662 This variable contains the eventual value of the PRIVLIB symbol,
2663 which is the name of the private library for this package. It may
2664 have a ~ on the front. It is up to the makefile to eventually create
2665 this directory while performing installation (with ~ substitution).
2666
2667privlibexp (privlib.U):
2668 This variable is the ~name expanded version of privlib, so that you
2669 may use it directly in Makefiles or shell scripts.
2670
2671prototype (prototype.U):
2672 This variable holds the eventual value of CAN_PROTOTYPE, which
2673 indicates the C compiler can handle funciton prototypes.
2674
2675ptrsize (ptrsize.U):
2676 This variable contains the value of the PTRSIZE symbol, which
2677 indicates to the C program how many bytes there are in a pointer.
2678
e0a10278 2679quadkind (quadtype.U):
0befd8de
JH
2680 This variable, if defined, encodes the type of a quad:
2681 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2682
2683quadtype (quadtype.U):
2684 This variable defines Quad_t to be something like long, int,
2685 long long, int64_t, or whatever type is used for 64-bit integers.
2686
781b178c
JH
2687randbits (randfunc.U):
2688 Indicates how many bits are produced by the function used to
2689 generate normalized random numbers.
2690
2691randfunc (randfunc.U):
2692 Indicates the name of the random number function to use.
2693 Values include drand48, random, and rand. In C programs,
2694 the 'Drand01' macro is defined to generate uniformly distributed
2695 random numbers over the range [0., 1.[ (see drand01 and nrand).
2696
2697randseedtype (randfunc.U):
2698 Indicates the type of the argument of the seedfunc.
2699
2700ranlib (orderlib.U):
2701 This variable is set to the pathname of the ranlib program, if it is
2702 needed to generate random libraries. Set to ":" if ar can generate
2703 random libraries or if random libraries are not supported
2704
2705rd_nodata (nblock_io.U):
2706 This variable holds the return code from read() when no data is
2707 present. It should be -1, but some systems return 0 when O_NDELAY is
2708 used, which is a shame because you cannot make the difference between
2709 no data and an EOF.. Sigh!
2710
2711rm (Loc.U):
5bf26616 2712 This variable is used internally by Configure to determine the
781b178c
JH
2713 full pathname (if any) of the rm program. After Configure runs,
2714 the value is reset to a plain "rm" and is not useful.
2715
2716rmail (Loc.U):
2717 This variable is defined but not used by Configure.
2718 The value is a plain '' and is not useful.
2719
2720runnm (usenm.U):
2721 This variable contains 'true' or 'false' depending whether the
2722 nm extraction should be performed or not, according to the value
2723 of usenm and the flags on the Configure command line.
2724
887d2938
JH
2725sPRIEldbl (longdblfio.U):
2726 This variable, if defined, contains the string used by stdio to
2727 format long doubles (format 'E') for output.
2728
2729sPRIFldbl (longdblfio.U):
2730 This variable, if defined, contains the string used by stdio to
2731 format long doubles (format 'F') for output.
2732
2733sPRIGldbl (longdblfio.U):
2734 This variable, if defined, contains the string used by stdio to
2735 format long doubles (format 'G') for output.
2736
2737sPRIX64 (quadfio.U):
2738 This variable, if defined, contains the string used by stdio to
2739 format 64-bit hExADECimAl numbers (format 'X') for output.
2740
2741sPRId64 (quadfio.U):
2742 This variable, if defined, contains the string used by stdio to
2743 format 64-bit decimal numbers (format 'd') for output.
2744
2745sPRIeldbl (longdblfio.U):
2746 This variable, if defined, contains the string used by stdio to
2747 format long doubles (format 'e') for output.
2748
2749sPRIfldbl (longdblfio.U):
2750 This variable, if defined, contains the string used by stdio to
2751 format long doubles (format 'f') for output.
2752
2753sPRIgldbl (longdblfio.U):
2754 This variable, if defined, contains the string used by stdio to
2755 format long doubles (format 'g') for output.
2756
2757sPRIi64 (quadfio.U):
2758 This variable, if defined, contains the string used by stdio to
2759 format 64-bit decimal numbers (format 'i') for output.
2760
2761sPRIo64 (quadfio.U):
2762 This variable, if defined, contains the string used by stdio to
2763 format 64-bit octal numbers (format 'o') for output.
2764
2765sPRIu64 (quadfio.U):
2766 This variable, if defined, contains the string used by stdio to
2767 format 64-bit unsigned decimal numbers (format 'u') for output.
2768
2769sPRIx64 (quadfio.U):
2770 This variable, if defined, contains the string used by stdio to
2771 format 64-bit hexadecimal numbers (format 'x') for output.
2772
781b178c
JH
2773sched_yield (d_pthread_y.U):
2774 This variable defines the way to yield the execution
2775 of the current thread.
2776
2777scriptdir (scriptdir.U):
2778 This variable holds the name of the directory in which the user wants
2779 to put publicly scripts for the package in question. It is either
2780 the same directory as for binaries, or a special one that can be
2781 mounted across different architectures, like /usr/share. Programs
2782 must be prepared to deal with ~name expansion.
2783
2784scriptdirexp (scriptdir.U):
2785 This variable is the same as scriptdir, but is filename expanded
2786 at configuration time, for programs not wanting to bother with it.
2787
2788sed (Loc.U):
5bf26616 2789 This variable is used internally by Configure to determine the
781b178c
JH
2790 full pathname (if any) of the sed program. After Configure runs,
2791 the value is reset to a plain "sed" and is not useful.
2792
2793seedfunc (randfunc.U):
2794 Indicates the random number generating seed function.
2795 Values include srand48, srandom, and srand.
2796
2797selectminbits (selectminbits.U):
2798 This variable holds the minimum number of bits operated by select.
2799 That is, if you do select(n, ...), how many bits at least will be
2800 cleared in the masks if some activity is detected. Usually this
2801 is either n or 32*ceil(n/32), especially many little-endians do
2802 the latter. This is only useful if you have select(), naturally.
2803
2804selecttype (selecttype.U):
2805 This variable holds the type used for the 2nd, 3rd, and 4th
2806 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2807 is defined, and 'int *' otherwise. This is only useful if you
2808 have select(), naturally.
2809
2810sendmail (Loc.U):
2811 This variable is defined but not used by Configure.
2812 The value is a plain '' and is not useful.
2813
2814sh (sh.U):
2815 This variable contains the full pathname of the shell used
2816 on this system to execute Bourne shell scripts. Usually, this will be
2817 /bin/sh, though it's possible that some systems will have /bin/ksh,
2818 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2819 D:/bin/sh.exe.
2820 This unit comes before Options.U, so you can't set sh with a '-D'
2821 option, though you can override this (and startsh)
2822 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2823
2824shar (Loc.U):
2825 This variable is defined but not used by Configure.
2826 The value is a plain '' and is not useful.
2827
2828sharpbang (spitshell.U):
2829 This variable contains the string #! if this system supports that
2830 construct.
2831
2832shmattype (d_shmat.U):
2833 This symbol contains the type of pointer returned by shmat().
2834 It can be 'void *' or 'char *'.
2835
2836shortsize (intsize.U):
2837 This variable contains the value of the SHORTSIZE symbol which
2838 indicates to the C program how many bytes there are in a short.
2839
2840shrpenv (libperl.U):
2841 If the user builds a shared libperl.so, then we need to tell the
2842 'perl' executable where it will be able to find the installed libperl.so.
2843 One way to do this on some systems is to set the environment variable
2844 LD_RUN_PATH to the directory that will be the final location of the
2845 shared libperl.so. The makefile can use this with something like
2846 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2847 Typical values are
2848 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2849 or
2850 shrpenv=''
2851 See the main perl Makefile.SH for actual working usage.
2852 Alternatively, we might be able to use a command line option such
2853 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2854 $archlibexp/CORE (Linux).
2855
2856shsharp (spitshell.U):
2857 This variable tells further Configure units whether your sh can
2858 handle # comments.
2859
2860sig_count (sig_name.U):
2861 This variable holds a number larger than the largest valid
2862 signal number. This is usually the same as the NSIG macro.
2863
2864sig_name (sig_name.U):
2865 This variable holds the signal names, space separated. The leading
2866 SIG in signal name is removed. A ZERO is prepended to the
2867 list. This is currently not used.
2868
2869sig_name_init (sig_name.U):
2870 This variable holds the signal names, enclosed in double quotes and
2871 separated by commas, suitable for use in the SIG_NAME definition
2872 below. A "ZERO" is prepended to the list, and the list is
2873 terminated with a plain 0. The leading SIG in signal names
2874 is removed. See sig_num.
2875
2876sig_num (sig_name.U):
2877 This variable holds the signal numbers, space separated. A ZERO is
2878 prepended to the list (corresponding to the fake SIGZERO), and
2879 the list is terminated with a 0. Those numbers correspond to
2880 the value of the signal listed in the same place within the
2881 sig_name list.
2882
2883sig_num_init (sig_name.U):
2884 This variable holds the signal numbers, enclosed in double quotes and
2885 separated by commas, suitable for use in the SIG_NUM definition
2886 below. A "ZERO" is prepended to the list, and the list is
2887 terminated with a plain 0.
2888
2889signal_t (d_voidsig.U):
2890 This variable holds the type of the signal handler (void or int).
2891
2892sitearch (sitearch.U):
2893 This variable contains the eventual value of the SITEARCH symbol,
2894 which is the name of the private library for this package. It may
2895 have a ~ on the front. It is up to the makefile to eventually create
2896 this directory while performing installation (with ~ substitution).
f868067f
JH
2897 The standard distribution will put nothing in this directory.
2898 After perl has been installed, users may install their own local
2899 architecture-dependent modules in this directory with
2900 MakeMaker Makefile.PL
2901 or equivalent. See INSTALL for details.
781b178c
JH
2902
2903sitearchexp (sitearch.U):
2904 This variable is the ~name expanded version of sitearch, so that you
2905 may use it directly in Makefiles or shell scripts.
2906
0617aed7
JH
2907sitebin (sitebin.U):
2908 This variable holds the name of the directory in which the user wants
2909 to put add-on publicly executable files for the package in question. It
2910 is most often a local directory such as /usr/local/bin. Programs using
2911 this variable must be prepared to deal with ~name substitution.
f868067f
JH
2912 The standard distribution will put nothing in this directory.
2913 After perl has been installed, users may install their own local
2914 executables in this directory with
2915 MakeMaker Makefile.PL
2916 or equivalent. See INSTALL for details.
0617aed7
JH
2917
2918sitebinexp (sitebin.U):
2919 This is the same as the sitebin variable, but is filename expanded at
2920 configuration time, for use in your makefiles.
2921
781b178c
JH
2922sitelib (sitelib.U):
2923 This variable contains the eventual value of the SITELIB symbol,
2924 which is the name of the private library for this package. It may
2925 have a ~ on the front. It is up to the makefile to eventually create
2926 this directory while performing installation (with ~ substitution).
f868067f
JH
2927 The standard distribution will put nothing in this directory.
2928 After perl has been installed, users may install their own local
2929 architecture-independent modules in this directory with
2930 MakeMaker Makefile.PL
2931 or equivalent. See INSTALL for details.
781b178c
JH
2932
2933sitelibexp (sitelib.U):
2934 This variable is the ~name expanded version of sitelib, so that you
2935 may use it directly in Makefiles or shell scripts.
2936
2937siteprefix (siteprefix.U):
2938 This variable holds the full absolute path of the directory below
2939 which the user will install add-on packages.
f868067f 2940 See INSTALL for usage and examples.
781b178c
JH
2941
2942siteprefixexp (siteprefix.U):
2943 This variable holds the full absolute path of the directory below
2944 which the user will install add-on packages. Derived from siteprefix.
2945
887d2938
JH
2946sizesize (sizesize.U):
2947 This variable contains the size of a sizetype in bytes.
2948
781b178c
JH
2949sizetype (sizetype.U):
2950 This variable defines sizetype to be something like size_t,
2951 unsigned long, or whatever type is used to declare length
2952 parameters for string functions.
2953
2954sleep (Loc.U):
2955 This variable is defined but not used by Configure.
2956 The value is a plain '' and is not useful.
2957
2958smail (Loc.U):
2959 This variable is defined but not used by Configure.
2960 The value is a plain '' and is not useful.
2961
2962small (models.U):
2963 This variable contains a flag which will tell the C compiler and loader
2964 to produce a program running with a small memory model. It is up to
2965 the Makefile to use this.
2966
2967so (so.U):
2968 This variable holds the extension used to identify shared libraries
2969 (also known as shared objects) on the system. Usually set to 'so'.
2970
2971sockethdr (d_socket.U):
2972 This variable has any cpp '-I' flags needed for socket support.
2973
2974socketlib (d_socket.U):
2975 This variable has the names of any libraries needed for socket support.
2976
2977sort (Loc.U):
5bf26616 2978 This variable is used internally by Configure to determine the
781b178c
JH
2979 full pathname (if any) of the sort program. After Configure runs,
2980 the value is reset to a plain "sort" and is not useful.
2981
2982spackage (package.U):
2983 This variable contains the name of the package being constructed,
2984 with the first letter uppercased, i.e. suitable for starting
2985 sentences.
2986
2987spitshell (spitshell.U):
2988 This variable contains the command necessary to spit out a runnable
2989 shell on this system. It is either cat or a grep '-v' for # comments.
2990
2991split (models.U):
2992 This variable contains a flag which will tell the C compiler and loader
2993 to produce a program that will run in separate I and D space, for those
2994 machines that support separation of instruction and data space. It is
2995 up to the Makefile to use this.
2996
2997src (src.U):
2998 This variable holds the path to the package source. It is up to
2999 the Makefile to use this variable and set VPATH accordingly to
3000 find the sources remotely.
3001
3002ssizetype (ssizetype.U):
3003 This variable defines ssizetype to be something like ssize_t,
3004 long or int. It is used by functions that return a count
3005 of bytes or an error condition. It must be a signed type.
3006 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3007
3008startperl (startperl.U):
3009 This variable contains the string to put on the front of a perl
3010 script to make sure (hopefully) that it runs with perl and not some
3011 shell. Of course, that leading line must be followed by the classical
3012 perl idiom:
3013 eval 'exec perl -S $0 ${1+"$@"}'
3014 if $running_under_some_shell;
3015 to guarantee perl startup should the shell execute the script. Note
3016 that this magic incatation is not understood by csh.
3017
3018startsh (startsh.U):
3019 This variable contains the string to put on the front of a shell
3020 script to make sure (hopefully) that it runs with sh and not some
3021 other shell.
3022
3023static_ext (Extensions.U):
3024 This variable holds a list of XS extension files we want to
3025 link statically into the package. It is used by Makefile.
3026
3027stdchar (stdchar.U):
3028 This variable conditionally defines STDCHAR to be the type of char
3029 used in stdio.h. It has the values "unsigned char" or "char".
3030
3031stdio_base (d_stdstdio.U):
3032 This variable defines how, given a FILE pointer, fp, to access the
3033 _base field (or equivalent) of stdio.h's FILE structure. This will
3034 be used to define the macro FILE_base(fp).
3035
3036stdio_bufsiz (d_stdstdio.U):
3037 This variable defines how, given a FILE pointer, fp, to determine
3038 the number of bytes store in the I/O buffer pointer to by the
3039 _base field (or equivalent) of stdio.h's FILE structure. This will
3040 be used to define the macro FILE_bufsiz(fp).
3041
3042stdio_cnt (d_stdstdio.U):
3043 This variable defines how, given a FILE pointer, fp, to access the
3044 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3045 be used to define the macro FILE_cnt(fp).
3046
3047stdio_filbuf (d_stdstdio.U):
3048 This variable defines how, given a FILE pointer, fp, to tell
3049 stdio to refill it's internal buffers (?). This will
3050 be used to define the macro FILE_filbuf(fp).
3051
3052stdio_ptr (d_stdstdio.U):
3053 This variable defines how, given a FILE pointer, fp, to access the
3054 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3055 be used to define the macro FILE_ptr(fp).
3056
3057stdio_stream_array (stdio_streams.U):
3058 This variable tells the name of the array holding the stdio streams.
3059 Usual values include _iob, __iob, and __sF.
3060
3061strings (i_string.U):
3062 This variable holds the full path of the string header that will be
3063 used. Typically /usr/include/string.h or /usr/include/strings.h.
3064
3065submit (Loc.U):
3066 This variable is defined but not used by Configure.
3067 The value is a plain '' and is not useful.
3068
3069subversion (patchlevel.U):
3070 The subversion level of this package.
3071 The value of subversion comes from the patchlevel.h file.
3072 This is unique to perl.
3073
3074sysman (sysman.U):
3075 This variable holds the place where the manual is located on this
3076 system. It is not the place where the user wants to put his manual
3077 pages. Rather it is the place where Configure may look to find manual
3078 for unix commands (section 1 of the manual usually). See mansrc.
3079
3080tail (Loc.U):
3081 This variable is defined but not used by Configure.
3082 The value is a plain '' and is not useful.
3083
3084tar (Loc.U):
3085 This variable is defined but not used by Configure.
3086 The value is a plain '' and is not useful.
3087
3088tbl (Loc.U):
3089 This variable is defined but not used by Configure.
3090 The value is a plain '' and is not useful.
3091
3092tee (Loc.U):
3093 This variable is defined but not used by Configure.
3094 The value is a plain '' and is not useful.
3095
3096test (Loc.U):
5bf26616 3097 This variable is used internally by Configure to determine the
781b178c
JH
3098 full pathname (if any) of the test program. After Configure runs,
3099 the value is reset to a plain "test" and is not useful.
3100
3101timeincl (i_time.U):
3102 This variable holds the full path of the included time header(s).
3103
3104timetype (d_time.U):
3105 This variable holds the type returned by time(). It can be long,
3106 or time_t on BSD sites (in which case <sys/types.h> should be
3107 included). Anyway, the type Time_t should be used.
3108
3109touch (Loc.U):
5bf26616 3110 This variable is used internally by Configure to determine the
781b178c
JH
3111 full pathname (if any) of the touch program. After Configure runs,
3112 the value is reset to a plain "touch" and is not useful.
3113
3114tr (Loc.U):
5bf26616 3115 This variable is used internally by Configure to determine the
781b178c
JH
3116 full pathname (if any) of the tr program. After Configure runs,
3117 the value is reset to a plain "tr" and is not useful.
3118
3119trnl (trnl.U):
3120 This variable contains the value to be passed to the tr(1)
3121 command to transliterate a newline. Typical values are
3122 '\012' and '\n'. This is needed for EBCDIC systems where
3123 newline is not necessarily '\012'.
3124
3125troff (Loc.U):
3126 This variable is defined but not used by Configure.
3127 The value is a plain '' and is not useful.
3128
a22e52b9
JH
3129u16size (perlxv.U):
3130 This variable is the size of an U16 in bytes.
3131
3132u16type (perlxv.U):
3133 This variable contains the C type used for Perl's U16.
3134
3135u32size (perlxv.U):
3136 This variable is the size of an U32 in bytes.
3137
3138u32type (perlxv.U):
3139 This variable contains the C type used for Perl's U32.
3140
3141u64size (perlxv.U):
3142 This variable is the size of an U64 in bytes.
3143
3144u64type (perlxv.U):
3145 This variable contains the C type used for Perl's U64.
3146
3147u8size (perlxv.U):
3148 This variable is the size of an U8 in bytes.
3149
3150u8type (perlxv.U):
3151 This variable contains the C type used for Perl's U8.
3152
3153uidformat (uidf.U):
3154 This variable contains the format string used for printing a Uid_t.
3155
2d228ff3
JH
3156uidsign (uidsign.U):
3157 This variable contains the signedness of a uidtype.
3158 1 for unsigned, -1 for signed.
3159
785fb66b
JH
3160uidsize (uidsize.U):
3161 This variable contains the size of a uidtype in bytes.
3162
781b178c
JH
3163uidtype (uidtype.U):
3164 This variable defines Uid_t to be something like uid_t, int,
3165 ushort, or whatever type is used to declare user ids in the kernel.
3166
3167uname (Loc.U):
5bf26616 3168 This variable is used internally by Configure to determine the
781b178c
JH
3169 full pathname (if any) of the uname program. After Configure runs,
3170 the value is reset to a plain "uname" and is not useful.
3171
3172uniq (Loc.U):
5bf26616 3173 This variable is used internally by Configure to determine the
781b178c
JH
3174 full pathname (if any) of the uniq program. After Configure runs,
3175 the value is reset to a plain "uniq" and is not useful.
3176
0befd8de
JH
3177uquadtype (quadtype.U):
3178 This variable defines Uquad_t to be something like unsigned long,
3179 unsigned int, unsigned long long, uint64_t, or whatever type is
3180 used for 64-bit integers.
3181
781b178c
JH
3182use64bits (use64bits.U):
3183 This variable conditionally defines the USE_64_BITS symbol,
3184 and indicates that explicit 64-bit interfaces should be used
3185 when available.
3186
3187usedl (dlsrc.U):
3188 This variable indicates if the the system supports dynamic
3189 loading of some sort. See also dlsrc and dlobj.
3190
5bf26616 3191uselargefiles (uselfs.U):
1baac590
JH
3192 This variable conditionally defines the USE_LARGE_FILES symbol,
3193 and indicates that large file interfaces should be used when
3194 available. The use64bits symbol will also be turned on if necessary.
3195
ca24dfc6
LV
3196uselongdouble (uselongdbl.U):
3197 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3198 and indicates that long doubles should be used when available.
3199
0befd8de
JH
3200uselonglong (uselonglong.U):
3201 This variable conditionally defines the USE_LONG_LONG symbol,
3202 and indicates that long longs should be used when available.
3203
1baac590
JH
3204usemorebits (usemorebits.U):
3205 This variable conditionally defines the USE_MORE_BITS symbol,
3206 and indicates that explicit 64-bit interfaces and long doubles
3207 should be used when available.
3208
781b178c
JH
3209usemultiplicity (usemultiplicity.U):
3210 This variable conditionally defines the MULTIPLICITY symbol,
3211 and indicates that Perl should be built to use multiplicity.
3212
3213usemymalloc (mallocsrc.U):
3214 This variable contains y if the malloc that comes with this package
3215 is desired over the system's version of malloc. People often include
3216 special versions of malloc for effiency, but such versions are often
3217 less portable. See also mallocsrc and mallocobj.
3218 If this is 'y', then -lmalloc is removed from $libs.
3219
3220usenm (usenm.U):
3221 This variable contains 'true' or 'false' depending whether the
3222 nm extraction is wanted or not.
3223
3224useopcode (Extensions.U):
3225 This variable holds either 'true' or 'false' to indicate
3226 whether the Opcode extension should be used. The sole
3227 use for this currently is to allow an easy mechanism
3228 for users to skip the Opcode extension from the Configure
3229 command line.
3230
3231useperlio (useperlio.U):
3232 This variable conditionally defines the USE_PERLIO symbol,
3233 and indicates that the PerlIO abstraction should be
3234 used throughout.
3235
3236useposix (Extensions.U):
3237 This variable holds either 'true' or 'false' to indicate
3238 whether the POSIX extension should be used. The sole
3239 use for this currently is to allow an easy mechanism
3240 for hints files to indicate that POSIX will not compile
3241 on a particular system.
3242
3243usesfio (d_sfio.U):
3244 This variable is set to true when the user agrees to use sfio.
3245 It is set to false when sfio is not available or when the user
3246 explicitely requests not to use sfio. It is here primarily so
3247 that command-line settings can override the auto-detection of
3248 d_sfio without running into a "WHOA THERE".
3249
3250useshrplib (libperl.U):
3251 This variable is set to 'yes' if the user wishes
3252 to build a shared libperl, and 'no' otherwise.
3253
3254usesocks (usesocks.U):
3255 This variable conditionally defines the USE_SOCKS symbol,
3256 and indicates that Perl should be built to use SOCKS.
3257
3258usethreads (usethreads.U):
3259 This variable conditionally defines the USE_THREADS symbol,
3260 and indicates that Perl should be built to use threads.
3261
9f50e519
NA
3262usevendorprefix (vendorprefix.U):
3263 This variable tells whether the vendorprefix
3264 and consequently other vendor* paths are in use.
3265
781b178c
JH
3266usevfork (d_vfork.U):
3267 This variable is set to true when the user accepts to use vfork.
3268 It is set to false when no vfork is available or when the user
3269 explicitely requests not to use vfork.
3270
3271usrinc (usrinc.U):
3272 This variable holds the path of the include files, which is
3273 usually /usr/include. It is mainly used by other Configure units.
3274
3275uuname (Loc.U):
3276 This variable is defined but not used by Configure.
3277 The value is a plain '' and is not useful.
3278
a22e52b9
JH
3279uvoformat (perlxvf.U):
3280 This variable contains the format string used for printing
3281 a Perl UV as an unsigned octal integer.
3282
3283uvsize (perlxv.U):
3284 This variable is the size of a UV in bytes.
3285
3286uvtype (perlxv.U):
3287 This variable contains the C type used for Perl's UV.
3288
3289uvuformat (perlxvf.U):
3290 This variable contains the format string used for printing
3291 a Perl UV as an unsigned decimal integer.
3292
3293uvxformat (perlxvf.U):
3294 This variable contains the format string used for printing
3295 a Perl UV as an unsigned hexadecimal integer.
3296
0617aed7 3297vendorbin (vendorbin.U):
f868067f
JH
3298 This variable contains the eventual value of the VENDORBIN symbol.
3299 It may have a ~ on the front.
3300 The standard distribution will put nothing in this directory.
3301 Vendors who distribute perl may wish to place additional
3302 binaries in this directory with
3303 MakeMaker Makefile.PL INSTALLDIRS=vendor
3304 or equivalent. See INSTALL for details.
0617aed7
JH
3305
3306vendorbinexp (vendorbin.U):
3307 This variable is the ~name expanded version of vendorbin, so that you
3308 may use it directly in Makefiles or shell scripts.
3309
a3635516
JH
3310vendorlib (vendorlib.U):
3311 This variable contains the eventual value of the VENDORLIB symbol,
f868067f
JH
3312 which is the name of the private library for this package.
3313 The standard distribution will put nothing in this directory.
3314 Vendors who distribute perl may wish to place their own
3315 modules in this directory with
3316 MakeMaker Makefile.PL INSTALLDIRS=vendor
3317 or equivalent. See INSTALL for details.
a3635516
JH
3318
3319vendorlibexp (vendorlib.U):
3320 This variable is the ~name expanded version of vendorlib, so that you
3321 may use it directly in Makefiles or shell scripts.
3322
3323vendorprefix (vendorprefix.U):
3324 This variable holds the full absolute path of the directory below
3325 which the vendor will install add-on packages.
f868067f 3326 See INSTALL for usage and examples.
a3635516
JH
3327
3328vendorprefixexp (vendorprefix.U):
3329 This variable holds the full absolute path of the directory below
3330 which the vendor will install add-on packages. Derived from vendorprefix.
3331
781b178c
JH
3332version (patchlevel.U):
3333 The full version number of this package. This combines
3334 baserev, patchlevel, and subversion to get the full
3335 version number, including any possible subversions. Care
3336 is taken to use the C locale in order to get something
3337 like 5.004 instead of 5,004. This is unique to perl.
3338
3339vi (Loc.U):
3340 This variable is defined but not used by Configure.
3341 The value is a plain '' and is not useful.
3342
3343voidflags (voidflags.U):
3344 This variable contains the eventual value of the VOIDFLAGS symbol,
3345 which indicates how much support of the void type is given by this
3346 compiler. See VOIDFLAGS for more info.
3347
3348xlibpth (libpth.U):
3349 This variable holds extra path (space-separated) used to find
3350 libraries on this platform, for example CPU-specific libraries
3351 (on multi-CPU platforms) may be listed here.
3352
75347591
JH
3353xs_apiversion (xs_apiversion.U):
3354 This variable contains the version of the oldest perl binary
3355 compatible with the present perl. perl.c:incpush() and
3356 lib/lib.pm will automatically search in $sitearch for older
3357 directories across major versions back to xs_apiversion.
3358 This is only useful if you have a perl library directory tree
3359 structured like the default one.
3360 See INSTALL for how this works.
3361 The versioned site_perl directory was introduced in 5.005,
3362 so that is the lowest possible value.
3363 Since this can depend on compile time options (such as
3364 bincompat) it is set by Configure. Other non-default sources
3365 of potential incompatibility, such as multiplicity, threads,
3366 debugging, 64bits, sfio, etc., are not checked for currently,
3367 though in principle we could go snooping around in old
3368 Config.pm files.
3369
781b178c
JH
3370zcat (Loc.U):
3371 This variable is defined but not used by Configure.
3372 The value is a plain '' and is not useful.
3373
3374zip (Loc.U):
5bf26616 3375 This variable is used internally by Configure to determine the
781b178c
JH
3376 full pathname (if any) of the zip program. After Configure runs,
3377 the value is reset to a plain "zip" and is not useful.
3378