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1This file contains a description of all the shell variables whose value is
2determined by the Configure script. Variables intended for use in C
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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
24412007 5the formatting regular.]
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781b178c 7_a (Unix.U):
9285ede2 8 This variable defines the extension used for ordinary library files.
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9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
11
12_exe (Unix.U):
13 This variable defines the extension used for executable files.
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14 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
15 On operating systems which do not require a specific extension
16 for executable files, this variable is empty.
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17
18_o (Unix.U):
19 This variable defines the extension used for object files.
20 For unix, it is '.o'. The '.' is included. Other possible
21 values include '.obj'.
22
23afs (afs.U):
24 This variable is set to 'true' if AFS (Andrew File System) is used
25 on the system, 'false' otherwise. It is possible to override this
26 with a hint value or command line option, but you'd better know
27 what you are doing.
28
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29afsroot (afs.U):
30 This variable is by default set to '/afs'. In the unlikely case
31 this is not the correct root, it is possible to override this with
32 a hint value or command line option. This will be used in subsequent
33 tests for AFSness in the Perl configure and test process.
34
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35alignbytes (alignbytes.U):
36 This variable holds the number of bytes required to align a
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37 double-- or a long double when applicable. Usual values are
38 2, 4 and 8. The default is eight, for safety.
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39
40ansi2knr (ansi2knr.U):
41 This variable is set if the user needs to run ansi2knr.
42 Currently, this is not supported, so we just abort.
43
44aphostname (d_gethname.U):
45 This variable contains the command which can be used to compute the
46 host name. The command is fully qualified by its absolute path, to make
47 it safe when used by a process with super-user privileges.
48
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49api_revision (patchlevel.U):
50 The three variables, api_revision, api_version, and
51 api_subversion, specify the version of the oldest perl binary
52 compatible with the present perl. In a full version string
53 such as '5.6.1', api_revision is the '5'.
54 Prior to 5.5.640, the format was a floating point number,
55 like 5.00563.
56 perl.c:incpush() and lib/lib.pm will automatically search in
57 $sitelib/.. for older directories back to the limit specified
58 by these api_ variables. This is only useful if you have a
59 perl library directory tree structured like the default one.
60 See INSTALL for how this works. The versioned site_perl
61 directory was introduced in 5.005, so that is the lowest
62 possible value. The version list appropriate for the current
63 system is determined in inc_version_list.U.
64 XXX To do: Since compatibility can depend on compile time
08e5223a 65 options (such as bincompat, longlong, etc.) it should
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66 (perhaps) be set by Configure, but currently it isn't.
67 Currently, we read a hard-wired value from patchlevel.h.
68 Perhaps what we ought to do is take the hard-wired value from
69 patchlevel.h but then modify it if the current Configure
70 options warrant. patchlevel.h then would use an #ifdef guard.
71
72api_subversion (patchlevel.U):
73 The three variables, api_revision, api_version, and
74 api_subversion, specify the version of the oldest perl binary
75 compatible with the present perl. In a full version string
76 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 full details.
78
79api_version (patchlevel.U):
80 The three variables, api_revision, api_version, and
81 api_subversion, specify the version of the oldest perl binary
82 compatible with the present perl. In a full version string
83 such as '5.6.1', api_version is the '6'. See api_revision for
84 full details. As a special case, 5.5.0 is rendered in the
85 old-style as 5.005. (In the 5.005_0x maintenance series,
86 this was the only versioned directory in $sitelib.)
87
88api_versionstring (patchlevel.U):
89 This variable combines api_revision, api_version, and
90 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
91 for use as a directory name. This is filesystem dependent.
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92
93ar (Loc.U):
5bf26616 94 This variable is used internally by Configure to determine the
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95 full pathname (if any) of the ar program. After Configure runs,
96 the value is reset to a plain "ar" and is not useful.
97
98archlib (archlib.U):
99 This variable holds the name of the directory in which the user wants
100 to put architecture-dependent public library files for $package.
101 It is most often a local directory such as /usr/local/lib.
102 Programs using this variable must be prepared to deal
103 with filename expansion.
104
105archlibexp (archlib.U):
106 This variable is the same as the archlib variable, but is
107 filename expanded at configuration time, for convenient use.
108
109archname64 (use64bits.U):
110 This variable is used for the 64-bitness part of $archname.
111
112archname (archname.U):
113 This variable is a short name to characterize the current
114 architecture. It is used mainly to construct the default archlib.
115
116archobjs (Unix.U):
117 This variable defines any additional objects that must be linked
118 in with the program on this architecture. On unix, it is usually
119 empty. It is typically used to include emulations of unix calls
120 or other facilities. For perl on OS/2, for example, this would
121 include os2/os2.obj.
122
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123asctime_r_proto (d_asctime_r.U):
124 This variable encodes the prototype of asctime_r.
125
781b178c 126awk (Loc.U):
5bf26616 127 This variable is used internally by Configure to determine the
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128 full pathname (if any) of the awk program. After Configure runs,
129 the value is reset to a plain "awk" and is not useful.
130
131baserev (baserev.U):
132 The base revision level of this package, from the .package file.
133
134bash (Loc.U):
135 This variable is defined but not used by Configure.
136 The value is a plain '' and is not useful.
137
138bin (bin.U):
139 This variable holds the name of the directory in which the user wants
140 to put publicly executable images for the package in question. It
141 is most often a local directory such as /usr/local/bin. Programs using
142 this variable must be prepared to deal with ~name substitution.
143
144binexp (bin.U):
145 This is the same as the bin variable, but is filename expanded at
146 configuration time, for use in your makefiles.
147
148bison (Loc.U):
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149 This variable is used internally by Configure to determine the
150 full pathname (if any) of the bison program. After Configure runs,
151 the value is reset to a plain "bison" and is not useful.
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152
153byacc (Loc.U):
5bf26616 154 This variable is used internally by Configure to determine the
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155 full pathname (if any) of the byacc program. After Configure runs,
156 the value is reset to a plain "byacc" and is not useful.
157
158byteorder (byteorder.U):
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159 This variable holds the byte order in a UV. In the following,
160 larger digits indicate more significance. The variable byteorder
161 is either 4321 on a big-endian machine, or 1234 on a little-endian,
162 or 87654321 on a Cray ... or 3412 with weird order !
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163
164c (n.U):
165 This variable contains the \c string if that is what causes the echo
166 command to suppress newline. Otherwise it is null. Correct usage is
167 $echo $n "prompt for a question: $c".
168
169castflags (d_castneg.U):
170 This variable contains a flag that precise difficulties the
171 compiler has casting odd floating values to unsigned long:
172 0 = ok
173 1 = couldn't cast < 0
174 2 = couldn't cast >= 0x80000000
175 4 = couldn't cast in argument expression list
176
177cat (Loc.U):
5bf26616 178 This variable is used internally by Configure to determine the
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179 full pathname (if any) of the cat program. After Configure runs,
180 the value is reset to a plain "cat" and is not useful.
181
182cc (cc.U):
183 This variable holds the name of a command to execute a C compiler which
184 can resolve multiple global references that happen to have the same
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185 name. Usual values are 'cc' and 'gcc'.
186 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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187
188cccdlflags (dlsrc.U):
189 This variable contains any special flags that might need to be
190 passed with 'cc -c' to compile modules to be used to create a shared
191 library that will be used for dynamic loading. For hpux, this
192 should be +z. It is up to the makefile to use it.
193
194ccdlflags (dlsrc.U):
195 This variable contains any special flags that might need to be
196 passed to cc to link with a shared library for dynamic loading.
197 It is up to the makefile to use it. For sunos 4.1, it should
198 be empty.
199
200ccflags (ccflags.U):
201 This variable contains any additional C compiler flags desired by
202 the user. It is up to the Makefile to use this.
203
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204ccflags_uselargefiles (uselfs.U):
205 This variable contains the compiler flags needed by large file builds
206 and added to ccflags by hints files.
207
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208ccname (Checkcc.U):
209 This can set either by hints files or by Configure. If using
210 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
211 Some platforms, however, make good use of this by storing the
212 flavor of the C compiler being used here. For example if using
213 the Sun WorkShop suite, ccname will be 'workshop'.
214
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215ccsymbols (Cppsym.U):
216 The variable contains the symbols defined by the C compiler alone.
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217 The symbols defined by cpp or by cc when it calls cpp are not in
218 this list, see cppsymbols and cppccsymbols.
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219 The list is a space-separated list of symbol=value tokens.
220
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221ccversion (Checkcc.U):
222 This can set either by hints files or by Configure. If using
223 a (non-gcc) vendor cc, this variable may contain a version for
224 the compiler.
225
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226cf_by (cf_who.U):
227 Login name of the person who ran the Configure script and answered the
228 questions. This is used to tag both config.sh and config_h.SH.
229
230cf_email (cf_email.U):
231 Electronic mail address of the person who ran Configure. This can be
232 used by units that require the user's e-mail, like MailList.U.
233
234cf_time (cf_who.U):
235 Holds the output of the "date" command when the configuration file was
236 produced. This is used to tag both config.sh and config_h.SH.
237
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238charsize (charsize.U):
239 This variable contains the value of the CHARSIZE symbol, which
240 indicates to the C program how many bytes there are in a character.
241
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242chgrp (Loc.U):
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
245
246chmod (Loc.U):
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247 This variable is used internally by Configure to determine the
248 full pathname (if any) of the chmod program. After Configure runs,
249 the value is reset to a plain "chmod" and is not useful.
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250
251chown (Loc.U):
252 This variable is defined but not used by Configure.
253 The value is a plain '' and is not useful.
254
255clocktype (d_times.U):
256 This variable holds the type returned by times(). It can be long,
257 or clock_t on BSD sites (in which case <sys/types.h> should be
258 included).
259
260comm (Loc.U):
5bf26616 261 This variable is used internally by Configure to determine the
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262 full pathname (if any) of the comm program. After Configure runs,
263 the value is reset to a plain "comm" and is not useful.
264
265compress (Loc.U):
266 This variable is defined but not used by Configure.
267 The value is a plain '' and is not useful.
268
269contains (contains.U):
270 This variable holds the command to do a grep with a proper return
271 status. On most sane systems it is simply "grep". On insane systems
272 it is a grep followed by a cat followed by a test. This variable
273 is primarily for the use of other Configure units.
274
275cp (Loc.U):
5bf26616 276 This variable is used internally by Configure to determine the
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277 full pathname (if any) of the cp program. After Configure runs,
278 the value is reset to a plain "cp" and is not useful.
279
280cpio (Loc.U):
281 This variable is defined but not used by Configure.
282 The value is a plain '' and is not useful.
283
284cpp (Loc.U):
5bf26616 285 This variable is used internally by Configure to determine the
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286 full pathname (if any) of the cpp program. After Configure runs,
287 the value is reset to a plain "cpp" and is not useful.
288
289cpp_stuff (cpp_stuff.U):
290 This variable contains an identification of the catenation mechanism
291 used by the C preprocessor.
292
293cppccsymbols (Cppsym.U):
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294 The variable contains the symbols defined by the C compiler
295 when it calls cpp. The symbols defined by the cc alone or cpp
296 alone are not in this list, see ccsymbols and cppsymbols.
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297 The list is a space-separated list of symbol=value tokens.
298
299cppflags (ccflags.U):
300 This variable holds the flags that will be passed to the C pre-
301 processor. It is up to the Makefile to use it.
302
303cpplast (cppstdin.U):
304 This variable has the same functionality as cppminus, only it applies
305 to cpprun and not cppstdin.
306
307cppminus (cppstdin.U):
308 This variable contains the second part of the string which will invoke
309 the C preprocessor on the standard input and produce to standard
310 output. This variable will have the value "-" if cppstdin needs
311 a minus to specify standard input, otherwise the value is "".
312
313cpprun (cppstdin.U):
314 This variable contains the command which will invoke a C preprocessor
315 on standard input and put the output to stdout. It is guaranteed not
316 to be a wrapper and may be a null string if no preprocessor can be
317 made directly available. This preprocessor might be different from the
318 one used by the C compiler. Don't forget to append cpplast after the
319 preprocessor options.
320
321cppstdin (cppstdin.U):
322 This variable contains the command which will invoke the C
323 preprocessor on standard input and put the output to stdout.
324 It is primarily used by other Configure units that ask about
325 preprocessor symbols.
326
327cppsymbols (Cppsym.U):
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328 The variable contains the symbols defined by the C preprocessor
329 alone. The symbols defined by cc or by cc when it calls cpp are
330 not in this list, see ccsymbols and cppccsymbols.
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331 The list is a space-separated list of symbol=value tokens.
332
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333crypt_r_proto (d_crypt_r.U):
334 This variable encodes the prototype of crypt_r.
335
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336cryptlib (d_crypt.U):
337 This variable holds -lcrypt or the path to a libcrypt.a archive if
338 the crypt() function is not defined in the standard C library. It is
339 up to the Makefile to use this.
340
341csh (Loc.U):
5bf26616 342 This variable is used internally by Configure to determine the
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343 full pathname (if any) of the csh program. After Configure runs,
344 the value is reset to a plain "csh" and is not useful.
345
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346ctermid_r_proto (d_ctermid_r.U):
347 This variable encodes the prototype of ctermid_r.
348
349ctime_r_proto (d_ctime_r.U):
350 This variable encodes the prototype of ctime_r.
351
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352d__fwalk (d__fwalk.U):
353 This variable conditionally defines HAS__FWALK if _fwalk() is
354 available to apply a function to all the file handles.
355
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356d_access (d_access.U):
357 This variable conditionally defines HAS_ACCESS if the access() system
358 call is available to check for access permissions using real IDs.
359
360d_accessx (d_accessx.U):
361 This variable conditionally defines the HAS_ACCESSX symbol, which
362 indicates to the C program that the accessx() routine is available.
363
364d_alarm (d_alarm.U):
365 This variable conditionally defines the HAS_ALARM symbol, which
366 indicates to the C program that the alarm() routine is available.
367
368d_archlib (archlib.U):
369 This variable conditionally defines ARCHLIB to hold the pathname
370 of architecture-dependent library files for $package. If
371 $archlib is the same as $privlib, then this is set to undef.
372
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373d_asctime_r (d_asctime_r.U):
374 This variable conditionally defines the HAS_ASCTIME_R symbol,
375 which indicates to the C program that the asctime_r()
376 routine is available.
377
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378d_atolf (atolf.U):
379 This variable conditionally defines the HAS_ATOLF symbol, which
380 indicates to the C program that the atolf() routine is available.
381
382d_atoll (atoll.U):
383 This variable conditionally defines the HAS_ATOLL symbol, which
384 indicates to the C program that the atoll() routine is available.
385
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386d_attribut (d_attribut.U):
387 This variable conditionally defines HASATTRIBUTE, which
388 indicates the C compiler can check for function attributes,
389 such as printf formats.
390
391d_bcmp (d_bcmp.U):
392 This variable conditionally defines the HAS_BCMP symbol if
393 the bcmp() routine is available to compare strings.
394
395d_bcopy (d_bcopy.U):
396 This variable conditionally defines the HAS_BCOPY symbol if
397 the bcopy() routine is available to copy strings.
398
399d_bsd (Guess.U):
400 This symbol conditionally defines the symbol BSD when running on a
401 BSD system.
402
403d_bsdgetpgrp (d_getpgrp.U):
404 This variable conditionally defines USE_BSD_GETPGRP if
405 getpgrp needs one arguments whereas USG one needs none.
406
407d_bsdsetpgrp (d_setpgrp.U):
408 This variable conditionally defines USE_BSD_SETPGRP if
409 setpgrp needs two arguments whereas USG one needs none.
410 See also d_setpgid for a POSIX interface.
411
412d_bzero (d_bzero.U):
413 This variable conditionally defines the HAS_BZERO symbol if
414 the bzero() routine is available to set memory to 0.
415
416d_casti32 (d_casti32.U):
417 This variable conditionally defines CASTI32, which indicates
418 whether the C compiler can cast large floats to 32-bit ints.
419
420d_castneg (d_castneg.U):
421 This variable conditionally defines CASTNEG, which indicates
422 wether the C compiler can cast negative float to unsigned.
423
424d_charvspr (d_vprintf.U):
425 This variable conditionally defines CHARVSPRINTF if this system
426 has vsprintf returning type (char*). The trend seems to be to
427 declare it as "int vsprintf()".
428
429d_chown (d_chown.U):
430 This variable conditionally defines the HAS_CHOWN symbol, which
431 indicates to the C program that the chown() routine is available.
432
433d_chroot (d_chroot.U):
434 This variable conditionally defines the HAS_CHROOT symbol, which
435 indicates to the C program that the chroot() routine is available.
436
437d_chsize (d_chsize.U):
438 This variable conditionally defines the CHSIZE symbol, which
439 indicates to the C program that the chsize() routine is available
440 to truncate files. You might need a -lx to get this routine.
441
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442d_class (d_class.U):
443 This variable conditionally defines the HAS_CLASS symbol, which
444 indicates to the C program that the class() routine is available.
445
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446d_closedir (d_closedir.U):
447 This variable conditionally defines HAS_CLOSEDIR if closedir() is
448 available.
449
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450d_cmsghdr_s (d_cmsghdr_s.U):
451 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
452 which indicates that the struct cmsghdr is supported.
453
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454d_const (d_const.U):
455 This variable conditionally defines the HASCONST symbol, which
456 indicates to the C program that this C compiler knows about the
457 const type.
458
459d_crypt (d_crypt.U):
460 This variable conditionally defines the CRYPT symbol, which
461 indicates to the C program that the crypt() routine is available
462 to encrypt passwords and the like.
463
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464d_crypt_r (d_crypt_r.U):
465 This variable conditionally defines the HAS_CRYPT_R symbol,
466 which indicates to the C program that the crypt_r()
467 routine is available.
468
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469d_csh (d_csh.U):
470 This variable conditionally defines the CSH symbol, which
471 indicates to the C program that the C-shell exists.
472
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473d_ctermid_r (d_ctermid_r.U):
474 This variable conditionally defines the HAS_CTERMID_R symbol,
475 which indicates to the C program that the ctermid_r()
476 routine is available.
477
478d_ctime_r (d_ctime_r.U):
479 This variable conditionally defines the HAS_CTIME_R symbol,
480 which indicates to the C program that the ctime_r()
481 routine is available.
482
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483d_cuserid (d_cuserid.U):
484 This variable conditionally defines the HAS_CUSERID symbol, which
485 indicates to the C program that the cuserid() routine is available
486 to get character login names.
487
488d_dbl_dig (d_dbl_dig.U):
489 This variable conditionally defines d_dbl_dig if this system's
490 header files provide DBL_DIG, which is the number of significant
491 digits in a double precision number.
492
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493d_dbminitproto (d_dbminitproto.U):
494 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
495 which indicates to the C program that the system provides
496 a prototype for the dbminit() function. Otherwise, it is
497 up to the program to supply one.
498
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499d_difftime (d_difftime.U):
500 This variable conditionally defines the HAS_DIFFTIME symbol, which
501 indicates to the C program that the difftime() routine is available.
502
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503d_dirfd (d_dirfd.U):
504 This variable conditionally defines the HAS_DIRFD constant,
505 which indicates to the C program that dirfd() is available
506 to return the file descriptor of a directory stream.
507
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508d_dirnamlen (i_dirent.U):
509 This variable conditionally defines DIRNAMLEN, which indicates
510 to the C program that the length of directory entry names is
511 provided by a d_namelen field.
512
513d_dlerror (d_dlerror.U):
514 This variable conditionally defines the HAS_DLERROR symbol, which
515 indicates to the C program that the dlerror() routine is available.
516
517d_dlopen (d_dlopen.U):
518 This variable conditionally defines the HAS_DLOPEN symbol, which
519 indicates to the C program that the dlopen() routine is available.
520
521d_dlsymun (d_dlsymun.U):
522 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
523 indicates that we need to prepend an underscore to the symbol
524 name before calling dlsym().
525
526d_dosuid (d_dosuid.U):
527 This variable conditionally defines the symbol DOSUID, which
528 tells the C program that it should insert setuid emulation code
529 on hosts which have setuid #! scripts disabled.
530
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531d_drand48_r (d_drand48_r.U):
532 This variable conditionally defines the HAS_DRAND48_R symbol,
533 which indicates to the C program that the drand48_r()
534 routine is available.
535
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536d_drand48proto (d_drand48proto.U):
537 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
538 which indicates to the C program that the system provides
539 a prototype for the drand48() function. Otherwise, it is
540 up to the program to supply one.
541
542d_dup2 (d_dup2.U):
543 This variable conditionally defines HAS_DUP2 if dup2() is
544 available to duplicate file descriptors.
545
546d_eaccess (d_eaccess.U):
547 This variable conditionally defines the HAS_EACCESS symbol, which
548 indicates to the C program that the eaccess() routine is available.
549
550d_endgrent (d_endgrent.U):
551 This variable conditionally defines the HAS_ENDGRENT symbol, which
552 indicates to the C program that the endgrent() routine is available
553 for sequential access of the group database.
554
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555d_endgrent_r (d_endgrent_r.U):
556 This variable conditionally defines the HAS_ENDGRENT_R symbol,
557 which indicates to the C program that the endgrent_r()
558 routine is available.
559
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560d_endhent (d_endhent.U):
561 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
562 available to close whatever was being used for host queries.
563
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564d_endhostent_r (d_endhostent_r.U):
565 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
566 which indicates to the C program that the endhostent_r()
567 routine is available.
568
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569d_endnent (d_endnent.U):
570 This variable conditionally defines HAS_ENDNETENT if endnetent() is
571 available to close whatever was being used for network queries.
572
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573d_endnetent_r (d_endnetent_r.U):
574 This variable conditionally defines the HAS_ENDNETENT_R symbol,
575 which indicates to the C program that the endnetent_r()
576 routine is available.
577
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578d_endpent (d_endpent.U):
579 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
580 available to close whatever was being used for protocol queries.
581
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582d_endprotoent_r (d_endprotoent_r.U):
583 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
584 which indicates to the C program that the endprotoent_r()
585 routine is available.
586
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587d_endpwent (d_endpwent.U):
588 This variable conditionally defines the HAS_ENDPWENT symbol, which
589 indicates to the C program that the endpwent() routine is available
590 for sequential access of the passwd database.
591
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592d_endpwent_r (d_endpwent_r.U):
593 This variable conditionally defines the HAS_ENDPWENT_R symbol,
594 which indicates to the C program that the endpwent_r()
595 routine is available.
596
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597d_endsent (d_endsent.U):
598 This variable conditionally defines HAS_ENDSERVENT if endservent() is
599 available to close whatever was being used for service queries.
600
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601d_endservent_r (d_endservent_r.U):
602 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
603 which indicates to the C program that the endservent_r()
604 routine is available.
605
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606d_eofnblk (nblock_io.U):
607 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
608 when reading from a non-blocking I/O source.
609
610d_eunice (Guess.U):
611 This variable conditionally defines the symbols EUNICE and VAX, which
612 alerts the C program that it must deal with ideosyncracies of VMS.
613
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614d_fchdir (d_fchdir.U):
615 This variable conditionally defines the HAS_FCHDIR symbol, which
616 indicates to the C program that the fchdir() routine is available.
617
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618d_fchmod (d_fchmod.U):
619 This variable conditionally defines the HAS_FCHMOD symbol, which
620 indicates to the C program that the fchmod() routine is available
621 to change mode of opened files.
622
623d_fchown (d_fchown.U):
624 This variable conditionally defines the HAS_FCHOWN symbol, which
625 indicates to the C program that the fchown() routine is available
626 to change ownership of opened files.
627
628d_fcntl (d_fcntl.U):
629 This variable conditionally defines the HAS_FCNTL symbol, and indicates
630 whether the fcntl() function exists
631
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632d_fcntl_can_lock (d_fcntl_can_lock.U):
633 This variable conditionally defines the FCNTL_CAN_LOCK symbol
634 and indicates whether file locking with fcntl() works.
635
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636d_fd_macros (d_fd_set.U):
637 This variable contains the eventual value of the HAS_FD_MACROS symbol,
638 which indicates if your C compiler knows about the macros which
639 manipulate an fd_set.
640
641d_fd_set (d_fd_set.U):
642 This variable contains the eventual value of the HAS_FD_SET symbol,
643 which indicates if your C compiler knows about the fd_set typedef.
644
645d_fds_bits (d_fd_set.U):
646 This variable contains the eventual value of the HAS_FDS_BITS symbol,
647 which indicates if your fd_set typedef contains the fds_bits member.
648 If you have an fd_set typedef, but the dweebs who installed it did
649 a half-fast job and neglected to provide the macros to manipulate
650 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
651
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652d_fgetpos (d_fgetpos.U):
653 This variable conditionally defines HAS_FGETPOS if fgetpos() is
654 available to get the file position indicator.
655
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656d_finite (d_finite.U):
657 This variable conditionally defines the HAS_FINITE symbol, which
658 indicates to the C program that the finite() routine is available.
659
660d_finitel (d_finitel.U):
661 This variable conditionally defines the HAS_FINITEL symbol, which
662 indicates to the C program that the finitel() routine is available.
663
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664d_flexfnam (d_flexfnam.U):
665 This variable conditionally defines the FLEXFILENAMES symbol, which
666 indicates that the system supports filenames longer than 14 characters.
667
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668d_flock (d_flock.U):
669 This variable conditionally defines HAS_FLOCK if flock() is
670 available to do file locking.
671
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672d_flockproto (d_flockproto.U):
673 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
674 which indicates to the C program that the system provides
675 a prototype for the flock() function. Otherwise, it is
676 up to the program to supply one.
677
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678d_fork (d_fork.U):
679 This variable conditionally defines the HAS_FORK symbol, which
680 indicates to the C program that the fork() routine is available.
681
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682d_fp_class (d_fp_class.U):
683 This variable conditionally defines the HAS_FP_CLASS symbol, which
684 indicates to the C program that the fp_class() routine is available.
685
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686d_fpathconf (d_pathconf.U):
687 This variable conditionally defines the HAS_FPATHCONF symbol, which
688 indicates to the C program that the pathconf() routine is available
689 to determine file-system related limits and options associated
690 with a given open file descriptor.
691
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692d_fpclass (d_fpclass.U):
693 This variable conditionally defines the HAS_FPCLASS symbol, which
694 indicates to the C program that the fpclass() routine is available.
695
696d_fpclassify (d_fpclassify.U):
697 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
698 indicates to the C program that the fpclassify() routine is available.
699
700d_fpclassl (d_fpclassl.U):
701 This variable conditionally defines the HAS_FPCLASSL symbol, which
702 indicates to the C program that the fpclassl() routine is available.
703
c890dc6c 704d_fpos64_t (d_fpos64_t.U):
ca24dfc6 705 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 706
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707d_frexpl (d_frexpl.U):
708 This variable conditionally defines the HAS_FREXPL symbol, which
709 indicates to the C program that the frexpl() routine is available.
710
ad27e871 711d_fs_data_s (d_fs_data_s.U):
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712 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
713 which indicates that the struct fs_data is supported.
714
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715d_fseeko (d_fseeko.U):
716 This variable conditionally defines the HAS_FSEEKO symbol, which
717 indicates to the C program that the fseeko() routine is available.
718
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719d_fsetpos (d_fsetpos.U):
720 This variable conditionally defines HAS_FSETPOS if fsetpos() is
721 available to set the file position indicator.
722
0545a864 723d_fstatfs (d_fstatfs.U):
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724 This variable conditionally defines the HAS_FSTATFS symbol, which
725 indicates to the C program that the fstatfs() routine is available.
726
727d_fstatvfs (d_statvfs.U):
728 This variable conditionally defines the HAS_FSTATVFS symbol, which
729 indicates to the C program that the fstatvfs() routine is available.
730
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731d_fsync (d_fsync.U):
732 This variable conditionally defines the HAS_FSYNC symbol, which
733 indicates to the C program that the fsync() routine is available.
734
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735d_ftello (d_ftello.U):
736 This variable conditionally defines the HAS_FTELLO symbol, which
737 indicates to the C program that the ftello() routine is available.
738
739d_ftime (d_ftime.U):
740 This variable conditionally defines the HAS_FTIME symbol, which indicates
741 that the ftime() routine exists. The ftime() routine is basically
742 a sub-second accuracy clock.
743
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744d_Gconvert (d_gconvert.U):
745 This variable holds what Gconvert is defined as to convert
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746 floating point numbers into strings. By default, Configure
747 sets this macro to use the first of gconvert, gcvt, or sprintf
748 that pass sprintf-%g-like behaviour tests. If perl is using
749 long doubles, the macro uses the first of the following
750 functions that pass Configure's tests: qgcvt, sprintf (if
751 Configure knows how to make sprintf format long doubles--see
752 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
753 The gconvert_preference and gconvert_ld_preference variables
754 can be used to alter Configure's preferences, for doubles and
755 long doubles, respectively. If present, they contain a
756 space-separated list of one or more of the above function
757 names in the order they should be tried.
758 d_Gconvert may be set to override Configure with a platform-
759 specific function. If this function expects a double, a
760 different value may need to be set by the uselongdouble.cbu
761 call-back unit so that long doubles can be formatted without
762 loss of precision.
ff935051 763
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764d_getcwd (d_getcwd.U):
765 This variable conditionally defines the HAS_GETCWD symbol, which
766 indicates to the C program that the getcwd() routine is available
767 to get the current working directory.
768
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769d_getespwnam (d_getespwnam.U):
770 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
771 available to retrieve enchanced (shadow) password entries by name.
772
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773d_getfsstat (d_getfsstat.U):
774 This variable conditionally defines the HAS_GETFSSTAT symbol, which
775 indicates to the C program that the getfsstat() routine is available.
776
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777d_getgrent (d_getgrent.U):
778 This variable conditionally defines the HAS_GETGRENT symbol, which
779 indicates to the C program that the getgrent() routine is available
780 for sequential access of the group database.
781
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782d_getgrent_r (d_getgrent_r.U):
783 This variable conditionally defines the HAS_GETGRENT_R symbol,
784 which indicates to the C program that the getgrent_r()
785 routine is available.
786
787d_getgrgid_r (d_getgrgid_r.U):
788 This variable conditionally defines the HAS_GETGRGID_R symbol,
789 which indicates to the C program that the getgrgid_r()
790 routine is available.
791
792d_getgrnam_r (d_getgrnam_r.U):
793 This variable conditionally defines the HAS_GETGRNAM_R symbol,
794 which indicates to the C program that the getgrnam_r()
795 routine is available.
796
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797d_getgrps (d_getgrps.U):
798 This variable conditionally defines the HAS_GETGROUPS symbol, which
799 indicates to the C program that the getgroups() routine is available
800 to get the list of process groups.
801
802d_gethbyaddr (d_gethbyad.U):
803 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
804 indicates to the C program that the gethostbyaddr() routine is available
805 to look up hosts by their IP addresses.
806
807d_gethbyname (d_gethbynm.U):
808 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
809 indicates to the C program that the gethostbyname() routine is available
810 to look up host names in some data base or other.
811
812d_gethent (d_gethent.U):
813 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
814 available to look up host names in some data base or another.
815
816d_gethname (d_gethname.U):
817 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
818 indicates to the C program that the gethostname() routine may be
819 used to derive the host name.
820
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821d_gethostbyaddr_r (d_gethostbyaddr_r.U):
822 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
823 which indicates to the C program that the gethostbyaddr_r()
824 routine is available.
825
826d_gethostbyname_r (d_gethostbyname_r.U):
827 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
828 which indicates to the C program that the gethostbyname_r()
829 routine is available.
830
831d_gethostent_r (d_gethostent_r.U):
832 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
833 which indicates to the C program that the gethostent_r()
834 routine is available.
835
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836d_gethostprotos (d_gethostprotos.U):
837 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
838 which indicates to the C program that <netdb.h> supplies
839 prototypes for the various gethost*() functions.
840 See also netdbtype.U for probing for various netdb types.
841
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842d_getitimer (d_getitimer.U):
843 This variable conditionally defines the HAS_GETITIMER symbol, which
844 indicates to the C program that the getitimer() routine is available.
845
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846d_getlogin (d_getlogin.U):
847 This variable conditionally defines the HAS_GETLOGIN symbol, which
848 indicates to the C program that the getlogin() routine is available
849 to get the login name.
850
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851d_getlogin_r (d_getlogin_r.U):
852 This variable conditionally defines the HAS_GETLOGIN_R symbol,
853 which indicates to the C program that the getlogin_r()
854 routine is available.
855
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856d_getmnt (d_getmnt.U):
857 This variable conditionally defines the HAS_GETMNT symbol, which
858 indicates to the C program that the getmnt() routine is available
859 to retrieve one or more mount info blocks by filename.
860
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861d_getmntent (d_getmntent.U):
862 This variable conditionally defines the HAS_GETMNTENT symbol, which
863 indicates to the C program that the getmntent() routine is available
0617aed7 864 to iterate through mounted files to get their mount info.
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865
866d_getnbyaddr (d_getnbyad.U):
867 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
868 indicates to the C program that the getnetbyaddr() routine is available
869 to look up networks by their IP addresses.
870
871d_getnbyname (d_getnbynm.U):
872 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
873 indicates to the C program that the getnetbyname() routine is available
874 to look up networks by their names.
875
876d_getnent (d_getnent.U):
877 This variable conditionally defines HAS_GETNETENT if getnetent() is
878 available to look up network names in some data base or another.
879
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880d_getnetbyaddr_r (d_getnetbyaddr_r.U):
881 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
882 which indicates to the C program that the getnetbyaddr_r()
883 routine is available.
884
885d_getnetbyname_r (d_getnetbyname_r.U):
886 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
887 which indicates to the C program that the getnetbyname_r()
888 routine is available.
889
890d_getnetent_r (d_getnetent_r.U):
891 This variable conditionally defines the HAS_GETNETENT_R symbol,
892 which indicates to the C program that the getnetent_r()
893 routine is available.
894
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895d_getnetprotos (d_getnetprotos.U):
896 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
897 which indicates to the C program that <netdb.h> supplies
898 prototypes for the various getnet*() functions.
899 See also netdbtype.U for probing for various netdb types.
900
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901d_getpagsz (d_getpagsz.U):
902 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
903 is available to get the system page size.
904
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905d_getpbyname (d_getprotby.U):
906 This variable conditionally defines the HAS_GETPROTOBYNAME
907 symbol, which indicates to the C program that the
908 getprotobyname() routine is available to look up protocols
909 by their name.
910
911d_getpbynumber (d_getprotby.U):
912 This variable conditionally defines the HAS_GETPROTOBYNUMBER
913 symbol, which indicates to the C program that the
914 getprotobynumber() routine is available to look up protocols
915 by their number.
916
917d_getpent (d_getpent.U):
918 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
919 available to look up protocols in some data base or another.
920
921d_getpgid (d_getpgid.U):
922 This variable conditionally defines the HAS_GETPGID symbol, which
923 indicates to the C program that the getpgid(pid) function
924 is available to get the process group id.
925
926d_getpgrp2 (d_getpgrp2.U):
927 This variable conditionally defines the HAS_GETPGRP2 symbol, which
928 indicates to the C program that the getpgrp2() (as in DG/UX) routine
929 is available to get the current process group.
930
931d_getpgrp (d_getpgrp.U):
932 This variable conditionally defines HAS_GETPGRP if getpgrp() is
933 available to get the current process group.
934
935d_getppid (d_getppid.U):
936 This variable conditionally defines the HAS_GETPPID symbol, which
937 indicates to the C program that the getppid() routine is available
938 to get the parent process ID.
939
940d_getprior (d_getprior.U):
941 This variable conditionally defines HAS_GETPRIORITY if getpriority()
942 is available to get a process's priority.
943
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944d_getprotobyname_r (d_getprotobyname_r.U):
945 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
946 which indicates to the C program that the getprotobyname_r()
947 routine is available.
948
949d_getprotobynumber_r (d_getprotobynumber_r.U):
950 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
951 which indicates to the C program that the getprotobynumber_r()
952 routine is available.
953
954d_getprotoent_r (d_getprotoent_r.U):
955 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
956 which indicates to the C program that the getprotoent_r()
957 routine is available.
958
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959d_getprotoprotos (d_getprotoprotos.U):
960 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
961 which indicates to the C program that <netdb.h> supplies
962 prototypes for the various getproto*() functions.
963 See also netdbtype.U for probing for various netdb types.
964
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965d_getprpwnam (d_getprpwnam.U):
966 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
967 available to retrieve protected (shadow) password entries by name.
968
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969d_getpwent (d_getpwent.U):
970 This variable conditionally defines the HAS_GETPWENT symbol, which
971 indicates to the C program that the getpwent() routine is available
972 for sequential access of the passwd database.
973
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974d_getpwent_r (d_getpwent_r.U):
975 This variable conditionally defines the HAS_GETPWENT_R symbol,
976 which indicates to the C program that the getpwent_r()
977 routine is available.
978
979d_getpwnam_r (d_getpwnam_r.U):
980 This variable conditionally defines the HAS_GETPWNAM_R symbol,
981 which indicates to the C program that the getpwnam_r()
982 routine is available.
983
984d_getpwuid_r (d_getpwuid_r.U):
985 This variable conditionally defines the HAS_GETPWUID_R symbol,
986 which indicates to the C program that the getpwuid_r()
987 routine is available.
988
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989d_getsbyname (d_getsrvby.U):
990 This variable conditionally defines the HAS_GETSERVBYNAME
991 symbol, which indicates to the C program that the
992 getservbyname() routine is available to look up services
993 by their name.
994
995d_getsbyport (d_getsrvby.U):
996 This variable conditionally defines the HAS_GETSERVBYPORT
997 symbol, which indicates to the C program that the
998 getservbyport() routine is available to look up services
999 by their port.
1000
1001d_getsent (d_getsent.U):
1002 This variable conditionally defines HAS_GETSERVENT if getservent() is
1003 available to look up network services in some data base or another.
1004
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1005d_getservbyname_r (d_getservbyname_r.U):
1006 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1007 which indicates to the C program that the getservbyname_r()
1008 routine is available.
1009
1010d_getservbyport_r (d_getservbyport_r.U):
1011 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1012 which indicates to the C program that the getservbyport_r()
1013 routine is available.
1014
1015d_getservent_r (d_getservent_r.U):
1016 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1017 which indicates to the C program that the getservent_r()
1018 routine is available.
1019
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1020d_getservprotos (d_getservprotos.U):
1021 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1022 which indicates to the C program that <netdb.h> supplies
1023 prototypes for the various getserv*() functions.
1024 See also netdbtype.U for probing for various netdb types.
1025
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1026d_getspnam (d_getspnam.U):
1027 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1028 available to retrieve SysV shadow password entries by name.
1029
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1030d_getspnam_r (d_getspnam_r.U):
1031 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1032 which indicates to the C program that the getspnam_r()
1033 routine is available.
1034
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1035d_gettimeod (d_ftime.U):
1036 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1037 indicates that the gettimeofday() system call exists (to obtain a
1038 sub-second accuracy clock). You should probably include <sys/resource.h>.
1039
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1040d_gmtime_r (d_gmtime_r.U):
1041 This variable conditionally defines the HAS_GMTIME_R symbol,
1042 which indicates to the C program that the gmtime_r()
1043 routine is available.
1044
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1045d_gnulibc (d_gnulibc.U):
1046 Defined if we're dealing with the GNU C Library.
1047
1048d_grpasswd (i_grp.U):
1049 This variable conditionally defines GRPASSWD, which indicates
1050 that struct group in <grp.h> contains gr_passwd.
1051
1052d_hasmntopt (d_hasmntopt.U):
1053 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1054 indicates to the C program that the hasmntopt() routine is available
1055 to query the mount options of file systems.
1056
1057d_htonl (d_htonl.U):
1058 This variable conditionally defines HAS_HTONL if htonl() and its
1059 friends are available to do network order byte swapping.
1060
1061d_index (d_strchr.U):
1062 This variable conditionally defines HAS_INDEX if index() and
1063 rindex() are available for string searching.
1064
1065d_inetaton (d_inetaton.U):
1066 This variable conditionally defines the HAS_INET_ATON symbol, which
1067 indicates to the C program that the inet_aton() function is available
1068 to parse IP address "dotted-quad" strings.
1069
13b3f787 1070d_int64_t (d_int64_t.U):
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1071 This symbol will be defined if the C compiler supports int64_t.
1072
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1073d_isascii (d_isascii.U):
1074 This variable conditionally defines the HAS_ISASCII constant,
1075 which indicates to the C program that isascii() is available.
1076
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1077d_isfinite (d_isfinite.U):
1078 This variable conditionally defines the HAS_ISFINITE symbol, which
1079 indicates to the C program that the isfinite() routine is available.
1080
1081d_isinf (d_isinf.U):
1082 This variable conditionally defines the HAS_ISINF symbol, which
1083 indicates to the C program that the isinf() routine is available.
1084
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1085d_isnan (d_isnan.U):
1086 This variable conditionally defines the HAS_ISNAN symbol, which
1087 indicates to the C program that the isnan() routine is available.
1088
1089d_isnanl (d_isnanl.U):
1090 This variable conditionally defines the HAS_ISNANL symbol, which
1091 indicates to the C program that the isnanl() routine is available.
1092
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1093d_killpg (d_killpg.U):
1094 This variable conditionally defines the HAS_KILLPG symbol, which
1095 indicates to the C program that the killpg() routine is available
1096 to kill process groups.
1097
1098d_lchown (d_lchown.U):
1099 This variable conditionally defines the HAS_LCHOWN symbol, which
1100 indicates to the C program that the lchown() routine is available
1101 to operate on a symbolic link (instead of following the link).
1102
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1103d_ldbl_dig (d_ldbl_dig.U):
1104 This variable conditionally defines d_ldbl_dig if this system's
1105 header files provide LDBL_DIG, which is the number of significant
1106 digits in a long double precision number.
1107
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1108d_link (d_link.U):
1109 This variable conditionally defines HAS_LINK if link() is
1110 available to create hard links.
1111
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JH
1112d_localtime_r (d_localtime_r.U):
1113 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1114 which indicates to the C program that the localtime_r()
1115 routine is available.
1116
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JH
1117d_locconv (d_locconv.U):
1118 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1119 available for numeric and monetary formatting conventions.
1120
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JH
1121d_lockf (d_lockf.U):
1122 This variable conditionally defines HAS_LOCKF if lockf() is
1123 available to do file locking.
1124
1125d_longdbl (d_longdbl.U):
1126 This variable conditionally defines HAS_LONG_DOUBLE if
1127 the long double type is supported.
1128
1129d_longlong (d_longlong.U):
1130 This variable conditionally defines HAS_LONG_LONG if
1131 the long long type is supported.
1132
c890dc6c
JH
1133d_lseekproto (d_lseekproto.U):
1134 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1135 which indicates to the C program that the system provides
1136 a prototype for the lseek() function. Otherwise, it is
1137 up to the program to supply one.
1138
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JH
1139d_lstat (d_lstat.U):
1140 This variable conditionally defines HAS_LSTAT if lstat() is
1141 available to do file stats on symbolic links.
1142
792d8dab
JH
1143d_madvise (d_madvise.U):
1144 This variable conditionally defines HAS_MADVISE if madvise() is
1145 available to map a file into memory.
1146
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1147d_mblen (d_mblen.U):
1148 This variable conditionally defines the HAS_MBLEN symbol, which
1149 indicates to the C program that the mblen() routine is available
1150 to find the number of bytes in a multibye character.
1151
1152d_mbstowcs (d_mbstowcs.U):
1153 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1154 indicates to the C program that the mbstowcs() routine is available
1155 to convert a multibyte string into a wide character string.
1156
1157d_mbtowc (d_mbtowc.U):
1158 This variable conditionally defines the HAS_MBTOWC symbol, which
1159 indicates to the C program that the mbtowc() routine is available
1160 to convert multibyte to a wide character.
1161
1162d_memchr (d_memchr.U):
1163 This variable conditionally defines the HAS_MEMCHR symbol, which
1164 indicates to the C program that the memchr() routine is available
1165 to locate characters within a C string.
1166
1167d_memcmp (d_memcmp.U):
1168 This variable conditionally defines the HAS_MEMCMP symbol, which
1169 indicates to the C program that the memcmp() routine is available
1170 to compare blocks of memory.
1171
1172d_memcpy (d_memcpy.U):
1173 This variable conditionally defines the HAS_MEMCPY symbol, which
1174 indicates to the C program that the memcpy() routine is available
1175 to copy blocks of memory.
1176
1177d_memmove (d_memmove.U):
1178 This variable conditionally defines the HAS_MEMMOVE symbol, which
1179 indicates to the C program that the memmove() routine is available
1180 to copy potentatially overlapping blocks of memory.
1181
1182d_memset (d_memset.U):
1183 This variable conditionally defines the HAS_MEMSET symbol, which
1184 indicates to the C program that the memset() routine is available
1185 to set blocks of memory.
1186
1187d_mkdir (d_mkdir.U):
1188 This variable conditionally defines the HAS_MKDIR symbol, which
1189 indicates to the C program that the mkdir() routine is available
209e5c0a 1190 to create directories..
781b178c 1191
fe749a9f
JH
1192d_mkdtemp (d_mkdtemp.U):
1193 This variable conditionally defines the HAS_MKDTEMP symbol, which
1194 indicates to the C program that the mkdtemp() routine is available
1195 to exclusively create a uniquely named temporary directory.
1196
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1197d_mkfifo (d_mkfifo.U):
1198 This variable conditionally defines the HAS_MKFIFO symbol, which
1199 indicates to the C program that the mkfifo() routine is available.
1200
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JH
1201d_mkstemp (d_mkstemp.U):
1202 This variable conditionally defines the HAS_MKSTEMP symbol, which
1203 indicates to the C program that the mkstemp() routine is available
1204 to exclusively create and open a uniquely named temporary file.
1205
1206d_mkstemps (d_mkstemps.U):
1207 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1208 indicates to the C program that the mkstemps() routine is available
1209 to exclusively create and open a uniquely named (with a suffix)
1210 temporary file.
1211
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1212d_mktime (d_mktime.U):
1213 This variable conditionally defines the HAS_MKTIME symbol, which
1214 indicates to the C program that the mktime() routine is available.
1215
fe749a9f
JH
1216d_mmap (d_mmap.U):
1217 This variable conditionally defines HAS_MMAP if mmap() is
1218 available to map a file into memory.
1219
a3540c92
JH
1220d_modfl (d_modfl.U):
1221 This variable conditionally defines the HAS_MODFL symbol, which
1222 indicates to the C program that the modfl() routine is available.
1223
e67aeab1
JH
1224d_modfl_pow32_bug (d_modfl.U):
1225 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1226 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1227 For example from 4294967303.150000 one would get 4294967302.000000
1228 and 1.150000. The bug has been seen in certain versions of glibc,
1229 release 2.2.2 is known to be okay.
1230
fe749a9f
JH
1231d_mprotect (d_mprotect.U):
1232 This variable conditionally defines HAS_MPROTECT if mprotect() is
1233 available to modify the access protection of a memory mapped file.
1234
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1235d_msg (d_msg.U):
1236 This variable conditionally defines the HAS_MSG symbol, which
1237 indicates that the entire msg*(2) library is present.
1238
1239d_msg_ctrunc (d_socket.U):
1240 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1241 which indicates that the MSG_CTRUNC is available. #ifdef is
1242 not enough because it may be an enum, glibc has been known to do this.
1243
1244d_msg_dontroute (d_socket.U):
1245 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1246 which indicates that the MSG_DONTROUTE is available. #ifdef is
1247 not enough because it may be an enum, glibc has been known to do this.
1248
1249d_msg_oob (d_socket.U):
1250 This variable conditionally defines the HAS_MSG_OOB symbol,
1251 which indicates that the MSG_OOB is available. #ifdef is
1252 not enough because it may be an enum, glibc has been known to do this.
1253
1254d_msg_peek (d_socket.U):
1255 This variable conditionally defines the HAS_MSG_PEEK symbol,
1256 which indicates that the MSG_PEEK is available. #ifdef is
1257 not enough because it may be an enum, glibc has been known to do this.
1258
1259d_msg_proxy (d_socket.U):
1260 This variable conditionally defines the HAS_MSG_PROXY symbol,
1261 which indicates that the MSG_PROXY is available. #ifdef is
1262 not enough because it may be an enum, glibc has been known to do this.
1263
1264d_msgctl (d_msgctl.U):
1265 This variable conditionally defines the HAS_MSGCTL symbol, which
1266 indicates to the C program that the msgctl() routine is available.
1267
1268d_msgget (d_msgget.U):
1269 This variable conditionally defines the HAS_MSGGET symbol, which
1270 indicates to the C program that the msgget() routine is available.
1271
4e0554ec
JH
1272d_msghdr_s (d_msghdr_s.U):
1273 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1274 which indicates that the struct msghdr is supported.
1275
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1276d_msgrcv (d_msgrcv.U):
1277 This variable conditionally defines the HAS_MSGRCV symbol, which
1278 indicates to the C program that the msgrcv() routine is available.
1279
1280d_msgsnd (d_msgsnd.U):
1281 This variable conditionally defines the HAS_MSGSND symbol, which
1282 indicates to the C program that the msgsnd() routine is available.
1283
fe749a9f
JH
1284d_msync (d_msync.U):
1285 This variable conditionally defines HAS_MSYNC if msync() is
1286 available to synchronize a mapped file.
1287
1288d_munmap (d_munmap.U):
1289 This variable conditionally defines HAS_MUNMAP if munmap() is
1290 available to unmap a region mapped by mmap().
1291
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JH
1292d_mymalloc (mallocsrc.U):
1293 This variable conditionally defines MYMALLOC in case other parts
1294 of the source want to take special action if MYMALLOC is used.
1295 This may include different sorts of profiling or error detection.
1296
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1297d_nice (d_nice.U):
1298 This variable conditionally defines the HAS_NICE symbol, which
1299 indicates to the C program that the nice() routine is available.
1300
2765b840
JH
1301d_nl_langinfo (d_nl_langinfo.U):
1302 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1303 indicates to the C program that the nl_langinfo() routine is available.
1304
78691af5 1305d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1306 This variable indicates whether a variable of type nvtype
1307 can preserve all the bits a variable of type uvtype.
1308
c890dc6c 1309d_off64_t (d_off64_t.U):
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JH
1310 This symbol will be defined if the C compiler supports off64_t.
1311
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JH
1312d_old_pthread_create_joinable (d_pthrattrj.U):
1313 This variable conditionally defines pthread_create_joinable.
1314 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1315
1316d_oldpthreads (usethreads.U):
1317 This variable conditionally defines the OLD_PTHREADS_API symbol,
1318 and indicates that Perl should be built to use the old
8c09e4ca 1319 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1320 usethreads is set.
1321
1322d_oldsock (d_socket.U):
1323 This variable conditionally defines the OLDSOCKET symbol, which
1324 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1325
1326d_open3 (d_open3.U):
1327 This variable conditionally defines the HAS_OPEN3 manifest constant,
1328 which indicates to the C program that the 3 argument version of
1329 the open(2) function is available.
1330
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JH
1331d_pathconf (d_pathconf.U):
1332 This variable conditionally defines the HAS_PATHCONF symbol, which
1333 indicates to the C program that the pathconf() routine is available
1334 to determine file-system related limits and options associated
1335 with a given filename.
1336
1337d_pause (d_pause.U):
1338 This variable conditionally defines the HAS_PAUSE symbol, which
1339 indicates to the C program that the pause() routine is available
1340 to suspend a process until a signal is received.
1341
3b777bb4
GS
1342d_perl_otherlibdirs (otherlibdirs.U):
1343 This variable conditionally defines PERL_OTHERLIBDIRS, which
1344 contains a colon-separated set of paths for the perl binary to
1345 include in @INC. See also otherlibdirs.
1346
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JH
1347d_phostname (d_gethname.U):
1348 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1349 contains the shell command which, when fed to popen(), may be
1350 used to derive the host name.
1351
1352d_pipe (d_pipe.U):
1353 This variable conditionally defines the HAS_PIPE symbol, which
1354 indicates to the C program that the pipe() routine is available
1355 to create an inter-process channel.
1356
1357d_poll (d_poll.U):
1358 This variable conditionally defines the HAS_POLL symbol, which
1359 indicates to the C program that the poll() routine is available
1360 to poll active file descriptors.
1361
1362d_portable (d_portable.U):
1363 This variable conditionally defines the PORTABLE symbol, which
1364 indicates to the C program that it should not assume that it is
1365 running on the machine it was compiled on.
1366
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1367d_PRId64 (quadfio.U):
1368 This variable conditionally defines the PERL_PRId64 symbol, which
1369 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1370
1371d_PRIeldbl (longdblfio.U):
6b356c8e 1372 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1373 indiciates that stdio has a symbol to print long doubles.
1374
6b356c8e
JH
1375d_PRIEUldbl (longdblfio.U):
1376 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1377 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1378 The 'U' in the name is to separate this from d_PRIeldbl so that even
1379 case-blind systems can see the difference.
ff935051
JH
1380
1381d_PRIfldbl (longdblfio.U):
6b356c8e 1382 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1383 indiciates that stdio has a symbol to print long doubles.
1384
6b356c8e
JH
1385d_PRIFUldbl (longdblfio.U):
1386 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1387 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1388 The 'U' in the name is to separate this from d_PRIfldbl so that even
1389 case-blind systems can see the difference.
ff935051
JH
1390
1391d_PRIgldbl (longdblfio.U):
6b356c8e 1392 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1393 indiciates that stdio has a symbol to print long doubles.
1394
6b356c8e
JH
1395d_PRIGUldbl (longdblfio.U):
1396 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1397 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1398 The 'U' in the name is to separate this from d_PRIgldbl so that even
1399 case-blind systems can see the difference.
ff935051
JH
1400
1401d_PRIi64 (quadfio.U):
1402 This variable conditionally defines the PERL_PRIi64 symbol, which
1403 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1404
1405d_PRIo64 (quadfio.U):
1406 This variable conditionally defines the PERL_PRIo64 symbol, which
1407 indiciates that stdio has a symbol to print 64-bit octal numbers.
1408
1409d_PRIu64 (quadfio.U):
1410 This variable conditionally defines the PERL_PRIu64 symbol, which
1411 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1412 numbers.
1413
1414d_PRIx64 (quadfio.U):
1415 This variable conditionally defines the PERL_PRIx64 symbol, which
1416 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1417
6b356c8e
JH
1418d_PRIXU64 (quadfio.U):
1419 This variable conditionally defines the PERL_PRIXU64 symbol, which
ff935051 1420 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
6b356c8e
JH
1421 The 'U' in the name is to separate this from d_PRIx64 so that even
1422 case-blind systems can see the difference.
ff935051 1423
428dc699
JH
1424d_procselfexe (d_procselfexe.U):
1425 Defined if $procselfexe is symlink to the absolute
1426 pathname of the executing program.
1427
d6483fcc
JH
1428d_pthread_atfork (d_pthread_atfork.U):
1429 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1430 which indicates to the C program that the pthread_atfork()
1431 routine is available.
1432
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1433d_pthread_yield (d_pthread_y.U):
1434 This variable conditionally defines the HAS_PTHREAD_YIELD
1435 symbol if the pthread_yield routine is available to yield
1436 the execution of the current thread.
1437
1438d_pwage (i_pwd.U):
1439 This variable conditionally defines PWAGE, which indicates
1440 that struct passwd contains pw_age.
1441
1442d_pwchange (i_pwd.U):
1443 This variable conditionally defines PWCHANGE, which indicates
1444 that struct passwd contains pw_change.
1445
1446d_pwclass (i_pwd.U):
1447 This variable conditionally defines PWCLASS, which indicates
1448 that struct passwd contains pw_class.
1449
1450d_pwcomment (i_pwd.U):
1451 This variable conditionally defines PWCOMMENT, which indicates
1452 that struct passwd contains pw_comment.
1453
1454d_pwexpire (i_pwd.U):
1455 This variable conditionally defines PWEXPIRE, which indicates
1456 that struct passwd contains pw_expire.
1457
1458d_pwgecos (i_pwd.U):
1459 This variable conditionally defines PWGECOS, which indicates
1460 that struct passwd contains pw_gecos.
1461
1462d_pwpasswd (i_pwd.U):
1463 This variable conditionally defines PWPASSWD, which indicates
1464 that struct passwd contains pw_passwd.
1465
1466d_pwquota (i_pwd.U):
1467 This variable conditionally defines PWQUOTA, which indicates
1468 that struct passwd contains pw_quota.
1469
792d8dab
JH
1470d_qgcvt (d_qgcvt.U):
1471 This variable conditionally defines the HAS_QGCVT symbol, which
1472 indicates to the C program that the qgcvt() routine is available.
1473
de1c2614
JH
1474d_quad (quadtype.U):
1475 This variable, if defined, tells that there's a 64-bit integer type,
1476 quadtype.
1477
10bc17b6
JH
1478d_random_r (d_random_r.U):
1479 This variable conditionally defines the HAS_RANDOM_R symbol,
1480 which indicates to the C program that the random_r()
1481 routine is available.
1482
1483d_readdir64_r (d_readdir64_r.U):
1484 This variable conditionally defines the HAS_READDIR64_R symbol,
1485 which indicates to the C program that the readdir64_r()
1486 routine is available.
1487
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JH
1488d_readdir (d_readdir.U):
1489 This variable conditionally defines HAS_READDIR if readdir() is
1490 available to read directory entries.
1491
10bc17b6
JH
1492d_readdir_r (d_readdir_r.U):
1493 This variable conditionally defines the HAS_READDIR_R symbol,
1494 which indicates to the C program that the readdir_r()
1495 routine is available.
1496
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1497d_readlink (d_readlink.U):
1498 This variable conditionally defines the HAS_READLINK symbol, which
1499 indicates to the C program that the readlink() routine is available
1500 to read the value of a symbolic link.
1501
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1502d_readv (d_readv.U):
1503 This variable conditionally defines the HAS_READV symbol, which
1504 indicates to the C program that the readv() routine is available.
1505
1506d_recvmsg (d_recvmsg.U):
1507 This variable conditionally defines the HAS_RECVMSG symbol, which
1508 indicates to the C program that the recvmsg() routine is available.
1509
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1510d_rename (d_rename.U):
1511 This variable conditionally defines the HAS_RENAME symbol, which
1512 indicates to the C program that the rename() routine is available
1513 to rename files.
1514
1515d_rewinddir (d_readdir.U):
1516 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1517 available.
1518
1519d_rmdir (d_rmdir.U):
1520 This variable conditionally defines HAS_RMDIR if rmdir() is
1521 available to remove directories.
1522
1523d_safebcpy (d_safebcpy.U):
1524 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1525 the bcopy() routine can do overlapping copies. Normally, you
1526 should probably use memmove().
781b178c
JH
1527
1528d_safemcpy (d_safemcpy.U):
1529 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1530 the memcpy() routine can do overlapping copies.
b6cc3bc4 1531 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1532
1533d_sanemcmp (d_sanemcmp.U):
1534 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1535 the memcpy() routine is available and can be used to compare relative
1536 magnitudes of chars with their high bits set.
1537
ef9f17be
JH
1538d_sbrkproto (d_sbrkproto.U):
1539 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1540 which indicates to the C program that the system provides
1541 a prototype for the sbrk() function. Otherwise, it is
1542 up to the program to supply one.
1543
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JH
1544d_sched_yield (d_pthread_y.U):
1545 This variable conditionally defines the HAS_SCHED_YIELD
1546 symbol if the sched_yield routine is available to yield
1547 the execution of the current thread.
1548
1549d_scm_rights (d_socket.U):
1550 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1551 which indicates that the SCM_RIGHTS is available. #ifdef is
1552 not enough because it may be an enum, glibc has been known to do this.
1553
6b356c8e
JH
1554d_SCNfldbl (longdblfio.U):
1555 This variable conditionally defines the PERL_PRIfldbl symbol, which
1556 indiciates that stdio has a symbol to scan long doubles.
1557
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JH
1558d_seekdir (d_readdir.U):
1559 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1560 available.
1561
1562d_select (d_select.U):
1563 This variable conditionally defines HAS_SELECT if select() is
1564 available to select active file descriptors. A <sys/time.h>
1565 inclusion may be necessary for the timeout field.
1566
1567d_sem (d_sem.U):
1568 This variable conditionally defines the HAS_SEM symbol, which
1569 indicates that the entire sem*(2) library is present.
1570
1571d_semctl (d_semctl.U):
1572 This variable conditionally defines the HAS_SEMCTL symbol, which
1573 indicates to the C program that the semctl() routine is available.
1574
1575d_semctl_semid_ds (d_union_semun.U):
1576 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1577 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1578
1579d_semctl_semun (d_union_semun.U):
1580 This variable conditionally defines USE_SEMCTL_SEMUN, which
1581 indicates that union semun is to be used for semctl IPC_STAT.
1582
1583d_semget (d_semget.U):
1584 This variable conditionally defines the HAS_SEMGET symbol, which
1585 indicates to the C program that the semget() routine is available.
1586
1587d_semop (d_semop.U):
1588 This variable conditionally defines the HAS_SEMOP symbol, which
1589 indicates to the C program that the semop() routine is available.
1590
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JH
1591d_sendmsg (d_sendmsg.U):
1592 This variable conditionally defines the HAS_SENDMSG symbol, which
1593 indicates to the C program that the sendmsg() routine is available.
1594
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JH
1595d_setegid (d_setegid.U):
1596 This variable conditionally defines the HAS_SETEGID symbol, which
1597 indicates to the C program that the setegid() routine is available
1598 to change the effective gid of the current program.
1599
1600d_seteuid (d_seteuid.U):
1601 This variable conditionally defines the HAS_SETEUID symbol, which
1602 indicates to the C program that the seteuid() routine is available
1603 to change the effective uid of the current program.
1604
1605d_setgrent (d_setgrent.U):
1606 This variable conditionally defines the HAS_SETGRENT symbol, which
1607 indicates to the C program that the setgrent() routine is available
1608 for initializing sequential access to the group database.
1609
10bc17b6
JH
1610d_setgrent_r (d_setgrent_r.U):
1611 This variable conditionally defines the HAS_SETGRENT_R symbol,
1612 which indicates to the C program that the setgrent_r()
1613 routine is available.
1614
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JH
1615d_setgrps (d_setgrps.U):
1616 This variable conditionally defines the HAS_SETGROUPS symbol, which
1617 indicates to the C program that the setgroups() routine is available
1618 to set the list of process groups.
1619
1620d_sethent (d_sethent.U):
1621 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1622 available.
1623
10bc17b6
JH
1624d_sethostent_r (d_sethostent_r.U):
1625 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1626 which indicates to the C program that the sethostent_r()
1627 routine is available.
1628
4e0554ec
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1629d_setitimer (d_setitimer.U):
1630 This variable conditionally defines the HAS_SETITIMER symbol, which
1631 indicates to the C program that the setitimer() routine is available.
1632
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1633d_setlinebuf (d_setlnbuf.U):
1634 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1635 indicates to the C program that the setlinebuf() routine is available
1636 to change stderr or stdout from block-buffered or unbuffered to a
1637 line-buffered mode.
1638
1639d_setlocale (d_setlocale.U):
1640 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1641 available to handle locale-specific ctype implementations.
1642
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1643d_setlocale_r (d_setlocale_r.U):
1644 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1645 which indicates to the C program that the setlocale_r()
1646 routine is available.
1647
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1648d_setnent (d_setnent.U):
1649 This variable conditionally defines HAS_SETNETENT if setnetent() is
1650 available.
1651
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1652d_setnetent_r (d_setnetent_r.U):
1653 This variable conditionally defines the HAS_SETNETENT_R symbol,
1654 which indicates to the C program that the setnetent_r()
1655 routine is available.
1656
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1657d_setpent (d_setpent.U):
1658 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1659 available.
1660
1661d_setpgid (d_setpgid.U):
1662 This variable conditionally defines the HAS_SETPGID symbol if the
1663 setpgid(pid, gpid) function is available to set process group ID.
1664
1665d_setpgrp2 (d_setpgrp2.U):
1666 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1667 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1668 is available to set the current process group.
1669
1670d_setpgrp (d_setpgrp.U):
1671 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1672 available to set the current process group.
1673
1674d_setprior (d_setprior.U):
1675 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1676 is available to set a process's priority.
1677
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1678d_setproctitle (d_setproctitle.U):
1679 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1680 which indicates to the C program that the setproctitle() routine
1681 is available.
1682
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1683d_setprotoent_r (d_setprotoent_r.U):
1684 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1685 which indicates to the C program that the setprotoent_r()
1686 routine is available.
1687
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1688d_setpwent (d_setpwent.U):
1689 This variable conditionally defines the HAS_SETPWENT symbol, which
1690 indicates to the C program that the setpwent() routine is available
1691 for initializing sequential access to the passwd database.
1692
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1693d_setpwent_r (d_setpwent_r.U):
1694 This variable conditionally defines the HAS_SETPWENT_R symbol,
1695 which indicates to the C program that the setpwent_r()
1696 routine is available.
1697
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1698d_setregid (d_setregid.U):
1699 This variable conditionally defines HAS_SETREGID if setregid() is
1700 available to change the real and effective gid of the current
1701 process.
1702
1703d_setresgid (d_setregid.U):
1704 This variable conditionally defines HAS_SETRESGID if setresgid() is
1705 available to change the real, effective and saved gid of the current
1706 process.
1707
1708d_setresuid (d_setreuid.U):
1709 This variable conditionally defines HAS_SETREUID if setresuid() is
1710 available to change the real, effective and saved uid of the current
1711 process.
1712
1713d_setreuid (d_setreuid.U):
1714 This variable conditionally defines HAS_SETREUID if setreuid() is
1715 available to change the real and effective uid of the current
1716 process.
1717
1718d_setrgid (d_setrgid.U):
1719 This variable conditionally defines the HAS_SETRGID symbol, which
1720 indicates to the C program that the setrgid() routine is available
1721 to change the real gid of the current program.
1722
1723d_setruid (d_setruid.U):
1724 This variable conditionally defines the HAS_SETRUID symbol, which
1725 indicates to the C program that the setruid() routine is available
1726 to change the real uid of the current program.
1727
1728d_setsent (d_setsent.U):
1729 This variable conditionally defines HAS_SETSERVENT if setservent() is
1730 available.
1731
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1732d_setservent_r (d_setservent_r.U):
1733 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1734 which indicates to the C program that the setservent_r()
1735 routine is available.
1736
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1737d_setsid (d_setsid.U):
1738 This variable conditionally defines HAS_SETSID if setsid() is
1739 available to set the process group ID.
1740
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1741d_setvbuf (d_setvbuf.U):
1742 This variable conditionally defines the HAS_SETVBUF symbol, which
1743 indicates to the C program that the setvbuf() routine is available
1744 to change buffering on an open stdio stream.
1745
1746d_sfio (d_sfio.U):
1747 This variable conditionally defines the USE_SFIO symbol,
1748 and indicates whether sfio is available (and should be used).
1749
1750d_shm (d_shm.U):
1751 This variable conditionally defines the HAS_SHM symbol, which
1752 indicates that the entire shm*(2) library is present.
1753
1754d_shmat (d_shmat.U):
1755 This variable conditionally defines the HAS_SHMAT symbol, which
1756 indicates to the C program that the shmat() routine is available.
1757
1758d_shmatprototype (d_shmat.U):
1759 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1760 symbol, which indicates that sys/shm.h has a prototype for
1761 shmat.
1762
1763d_shmctl (d_shmctl.U):
1764 This variable conditionally defines the HAS_SHMCTL symbol, which
1765 indicates to the C program that the shmctl() routine is available.
1766
1767d_shmdt (d_shmdt.U):
1768 This variable conditionally defines the HAS_SHMDT symbol, which
1769 indicates to the C program that the shmdt() routine is available.
1770
1771d_shmget (d_shmget.U):
1772 This variable conditionally defines the HAS_SHMGET symbol, which
1773 indicates to the C program that the shmget() routine is available.
1774
1775d_sigaction (d_sigaction.U):
1776 This variable conditionally defines the HAS_SIGACTION symbol, which
1777 indicates that the Vr4 sigaction() routine is available.
1778
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1779d_sigprocmask (d_sigprocmask.U):
1780 This variable conditionally defines HAS_SIGPROCMASK
1781 if sigprocmask() is available to examine or change the signal mask
1782 of the calling process.
1783
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1784d_sigsetjmp (d_sigsetjmp.U):
1785 This variable conditionally defines the HAS_SIGSETJMP symbol,
1786 which indicates that the sigsetjmp() routine is available to
1787 call setjmp() and optionally save the process's signal mask.
1788
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1789d_sockatmark (d_sockatmark.U):
1790 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1791 indicates to the C program that the sockatmark() routine is available.
1792
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1793d_sockatmarkproto (d_sockatmarkproto.U):
1794 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1795 which indicates to the C program that the system provides
1796 a prototype for the sockatmark() function. Otherwise, it is
1797 up to the program to supply one.
1798
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1799d_socket (d_socket.U):
1800 This variable conditionally defines HAS_SOCKET, which indicates
1801 that the BSD socket interface is supported.
1802
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1803d_socklen_t (d_socklen_t.U):
1804 This symbol will be defined if the C compiler supports socklen_t.
1805
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1806d_sockpair (d_socket.U):
1807 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1808 indicates that the BSD socketpair() is supported.
1809
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1810d_socks5_init (d_socks5_init.U):
1811 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1812 indicates to the C program that the socks5_init() routine is available.
1813
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1814d_sqrtl (d_sqrtl.U):
1815 This variable conditionally defines the HAS_SQRTL symbol, which
1816 indicates to the C program that the sqrtl() routine is available.
1817
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1818d_srand48_r (d_srand48_r.U):
1819 This variable conditionally defines the HAS_SRAND48_R symbol,
1820 which indicates to the C program that the srand48_r()
1821 routine is available.
1822
1823d_srandom_r (d_srandom_r.U):
1824 This variable conditionally defines the HAS_SRANDOM_R symbol,
1825 which indicates to the C program that the srandom_r()
1826 routine is available.
1827
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1828d_sresgproto (d_sresgproto.U):
1829 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1830 which indicates to the C program that the system provides
1831 a prototype for the setresgid() function. Otherwise, it is
1832 up to the program to supply one.
1833
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1834d_sresuproto (d_sresuproto.U):
1835 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1836 which indicates to the C program that the system provides
1837 a prototype for the setresuid() function. Otherwise, it is
1838 up to the program to supply one.
1839
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1840d_statblks (d_statblks.U):
1841 This variable conditionally defines USE_STAT_BLOCKS
1842 if this system has a stat structure declaring
1843 st_blksize and st_blocks.
1844
ad27e871 1845d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1846 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
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1847 symbol, which indicates to struct statfs from has f_flags member.
1848 This kind of struct statfs is coming from sys/mount.h (BSD),
1849 not from sys/statfs.h (SYSV).
1850
ad27e871 1851d_statfs_s (d_statfs_s.U):
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JH
1852 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1853 which indicates that the struct statfs is supported.
1854
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1855d_statvfs (d_statvfs.U):
1856 This variable conditionally defines the HAS_STATVFS symbol, which
1857 indicates to the C program that the statvfs() routine is available.
1858
1859d_stdio_cnt_lval (d_stdstdio.U):
1860 This variable conditionally defines STDIO_CNT_LVALUE if the
1861 FILE_cnt macro can be used as an lvalue.
1862
1863d_stdio_ptr_lval (d_stdstdio.U):
1864 This variable conditionally defines STDIO_PTR_LVALUE if the
1865 FILE_ptr macro can be used as an lvalue.
1866
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NC
1867d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1868 This symbol is defined if using the FILE_ptr macro as an lvalue
1869 to increase the pointer by n leaves File_cnt(fp) unchanged.
1870
1871d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1872 This symbol is defined if using the FILE_ptr macro as an lvalue
1873 to increase the pointer by n has the side effect of decreasing the
1874 value of File_cnt(fp) by n.
1875
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1876d_stdio_stream_array (stdio_streams.U):
1877 This variable tells whether there is an array holding
1878 the stdio streams.
1879
1880d_stdiobase (d_stdstdio.U):
1881 This variable conditionally defines USE_STDIO_BASE if this system
1882 has a FILE structure declaring a usable _base field (or equivalent)
1883 in stdio.h.
1884
1885d_stdstdio (d_stdstdio.U):
1886 This variable conditionally defines USE_STDIO_PTR if this system
1887 has a FILE structure declaring usable _ptr and _cnt fields (or
1888 equivalent) in stdio.h.
1889
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1890d_strchr (d_strchr.U):
1891 This variable conditionally defines HAS_STRCHR if strchr() and
1892 strrchr() are available for string searching.
1893
1894d_strcoll (d_strcoll.U):
1895 This variable conditionally defines HAS_STRCOLL if strcoll() is
1896 available to compare strings using collating information.
1897
1898d_strctcpy (d_strctcpy.U):
1899 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1900 indicates to the C program that this C compiler knows how to copy
1901 structures.
1902
1903d_strerrm (d_strerror.U):
1904 This variable holds what Strerrr is defined as to translate an error
1905 code condition into an error message string. It could be 'strerror'
1906 or a more complex macro emulating strrror with sys_errlist[], or the
1907 "unknown" string when both strerror and sys_errlist are missing.
1908
1909d_strerror (d_strerror.U):
1910 This variable conditionally defines HAS_STRERROR if strerror() is
1911 available to translate error numbers to strings.
1912
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1913d_strerror_r (d_strerror_r.U):
1914 This variable conditionally defines the HAS_STRERROR_R symbol,
1915 which indicates to the C program that the strerror_r()
1916 routine is available.
1917
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1918d_strftime (d_strftime.U):
1919 This variable conditionally defines the HAS_STRFTIME symbol, which
1920 indicates to the C program that the strftime() routine is available.
1921
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1922d_strtod (d_strtod.U):
1923 This variable conditionally defines the HAS_STRTOD symbol, which
1924 indicates to the C program that the strtod() routine is available
1925 to provide better numeric string conversion than atof().
1926
1927d_strtol (d_strtol.U):
1928 This variable conditionally defines the HAS_STRTOL symbol, which
1929 indicates to the C program that the strtol() routine is available
1930 to provide better numeric string conversion than atoi() and friends.
1931
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1932d_strtold (d_strtold.U):
1933 This variable conditionally defines the HAS_STRTOLD symbol, which
1934 indicates to the C program that the strtold() routine is available.
1935
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1936d_strtoll (d_strtoll.U):
1937 This variable conditionally defines the HAS_STRTOLL symbol, which
1938 indicates to the C program that the strtoll() routine is available.
1939
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NC
1940d_strtoq (d_strtoq.U):
1941 This variable conditionally defines the HAS_STRTOQ symbol, which
1942 indicates to the C program that the strtoq() routine is available.
1943
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1944d_strtoul (d_strtoul.U):
1945 This variable conditionally defines the HAS_STRTOUL symbol, which
1946 indicates to the C program that the strtoul() routine is available
1947 to provide conversion of strings to unsigned long.
1948
ff935051 1949d_strtoull (d_strtoull.U):
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1950 This variable conditionally defines the HAS_STRTOULL symbol, which
1951 indicates to the C program that the strtoull() routine is available.
1952
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1953d_strtouq (d_strtouq.U):
1954 This variable conditionally defines the HAS_STRTOUQ symbol, which
1955 indicates to the C program that the strtouq() routine is available.
1956
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1957d_strxfrm (d_strxfrm.U):
1958 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1959 available to transform strings.
1960
1961d_suidsafe (d_dosuid.U):
1962 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1963 if setuid scripts can be secure. This test looks in /dev/fd/.
1964
1965d_symlink (d_symlink.U):
1966 This variable conditionally defines the HAS_SYMLINK symbol, which
1967 indicates to the C program that the symlink() routine is available
1968 to create symbolic links.
1969
1970d_syscall (d_syscall.U):
1971 This variable conditionally defines HAS_SYSCALL if syscall() is
1972 available call arbitrary system calls.
1973
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1974d_syscallproto (d_syscallproto.U):
1975 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1976 which indicates to the C program that the system provides
1977 a prototype for the syscall() function. Otherwise, it is
1978 up to the program to supply one.
1979
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1980d_sysconf (d_sysconf.U):
1981 This variable conditionally defines the HAS_SYSCONF symbol, which
1982 indicates to the C program that the sysconf() routine is available
1983 to determine system related limits and options.
1984
1985d_sysernlst (d_strerror.U):
1986 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1987 is available to translate error numbers to the symbolic name.
1988
1989d_syserrlst (d_strerror.U):
1990 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1991 available to translate error numbers to strings.
1992
1993d_system (d_system.U):
1994 This variable conditionally defines HAS_SYSTEM if system() is
1995 available to issue a shell command.
1996
1997d_tcgetpgrp (d_tcgtpgrp.U):
1998 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1999 indicates to the C program that the tcgetpgrp() routine is available.
2000 to get foreground process group ID.
2001
2002d_tcsetpgrp (d_tcstpgrp.U):
2003 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2004 indicates to the C program that the tcsetpgrp() routine is available
2005 to set foreground process group ID.
2006
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2007d_telldir (d_readdir.U):
2008 This variable conditionally defines HAS_TELLDIR if telldir() is
2009 available.
2010
2011d_telldirproto (d_telldirproto.U):
2012 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2013 which indicates to the C program that the system provides
2014 a prototype for the telldir() function. Otherwise, it is
2015 up to the program to supply one.
2016
2017d_time (d_time.U):
2018 This variable conditionally defines the HAS_TIME symbol, which indicates
2019 that the time() routine exists. The time() routine is normaly
2020 provided on UNIX systems.
2021
2022d_times (d_times.U):
2023 This variable conditionally defines the HAS_TIMES symbol, which indicates
2024 that the times() routine exists. The times() routine is normaly
2025 provided on UNIX systems. You may have to include <sys/times.h>.
2026
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2027d_tm_tm_gmtoff (i_time.U):
2028 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2029 indicates to the C program that the struct tm has the tm_gmtoff field.
2030
2031d_tm_tm_zone (i_time.U):
2032 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2033 indicates to the C program that the struct tm has the tm_zone field.
2034
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2035d_tmpnam_r (d_tmpnam_r.U):
2036 This variable conditionally defines the HAS_TMPNAM_R symbol,
2037 which indicates to the C program that the tmpnam_r()
2038 routine is available.
2039
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2040d_truncate (d_truncate.U):
2041 This variable conditionally defines HAS_TRUNCATE if truncate() is
2042 available to truncate files.
2043
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2044d_ttyname_r (d_ttyname_r.U):
2045 This variable conditionally defines the HAS_TTYNAME_R symbol,
2046 which indicates to the C program that the ttyname_r()
2047 routine is available.
2048
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2049d_tzname (d_tzname.U):
2050 This variable conditionally defines HAS_TZNAME if tzname[] is
2051 available to access timezone names.
2052
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2053d_u32align (d_u32align.U):
2054 This variable tells whether you must access character data
2055 through U32-aligned pointers.
2056
2057d_ualarm (d_ualarm.U):
2058 This variable conditionally defines the HAS_UALARM symbol, which
2059 indicates to the C program that the ualarm() routine is available.
2060
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2061d_umask (d_umask.U):
2062 This variable conditionally defines the HAS_UMASK symbol, which
2063 indicates to the C program that the umask() routine is available.
2064 to set and get the value of the file creation mask.
2065
2066d_uname (d_gethname.U):
2067 This variable conditionally defines the HAS_UNAME symbol, which
2068 indicates to the C program that the uname() routine may be
2069 used to derive the host name.
2070
2071d_union_semun (d_union_semun.U):
2072 This variable conditionally defines HAS_UNION_SEMUN if the
2073 union semun is defined by including <sys/sem.h>.
2074
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2075d_unordered (d_unordered.U):
2076 This variable conditionally defines the HAS_UNORDERED symbol, which
2077 indicates to the C program that the unordered() routine is available.
2078
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2079d_usleep (d_usleep.U):
2080 This variable conditionally defines HAS_USLEEP if usleep() is
2081 available to do high granularity sleeps.
2082
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2083d_usleepproto (d_usleepproto.U):
2084 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2085 which indicates to the C program that the system provides
2086 a prototype for the usleep() function. Otherwise, it is
2087 up to the program to supply one.
2088
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2089d_ustat (d_ustat.U):
2090 This variable conditionally defines HAS_USTAT if ustat() is
2091 available to query file system statistics by dev_t.
2092
526fdc24
MS
2093d_vendorarch (vendorarch.U):
2094 This variable conditionally defined PERL_VENDORARCH.
2095
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2096d_vendorbin (vendorbin.U):
2097 This variable conditionally defines PERL_VENDORBIN.
2098
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2099d_vendorlib (vendorlib.U):
2100 This variable conditionally defines PERL_VENDORLIB.
2101
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2102d_vfork (d_vfork.U):
2103 This variable conditionally defines the HAS_VFORK symbol, which
2104 indicates the vfork() routine is available.
2105
2106d_void_closedir (d_closedir.U):
2107 This variable conditionally defines VOID_CLOSEDIR if closedir()
2108 does not return a value.
2109
2110d_voidsig (d_voidsig.U):
2111 This variable conditionally defines VOIDSIG if this system
2112 declares "void (*signal(...))()" in signal.h. The old way was to
2113 declare it as "int (*signal(...))()".
2114
2115d_voidtty (i_sysioctl.U):
2116 This variable conditionally defines USE_IOCNOTTY to indicate that the
2117 ioctl() call with TIOCNOTTY should be used to void tty association.
2118 Otherwise (on USG probably), it is enough to close the standard file
2119 decriptors and do a setpgrp().
2120
2121d_volatile (d_volatile.U):
2122 This variable conditionally defines the HASVOLATILE symbol, which
2123 indicates to the C program that this C compiler knows about the
2124 volatile declaration.
2125
2126d_vprintf (d_vprintf.U):
2127 This variable conditionally defines the HAS_VPRINTF symbol, which
2128 indicates to the C program that the vprintf() routine is available
2129 to printf with a pointer to an argument list.
2130
2131d_wait4 (d_wait4.U):
2132 This variable conditionally defines the HAS_WAIT4 symbol, which
2133 indicates the wait4() routine is available.
2134
2135d_waitpid (d_waitpid.U):
2136 This variable conditionally defines HAS_WAITPID if waitpid() is
2137 available to wait for child process.
2138
2139d_wcstombs (d_wcstombs.U):
2140 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2141 indicates to the C program that the wcstombs() routine is available
2142 to convert wide character strings to multibyte strings.
2143
2144d_wctomb (d_wctomb.U):
2145 This variable conditionally defines the HAS_WCTOMB symbol, which
2146 indicates to the C program that the wctomb() routine is available
2147 to convert a wide character to a multibyte.
2148
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2149d_writev (d_writev.U):
2150 This variable conditionally defines the HAS_WRITEV symbol, which
2151 indicates to the C program that the writev() routine is available.
2152
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2153d_xenix (Guess.U):
2154 This variable conditionally defines the symbol XENIX, which alerts
2155 the C program that it runs under Xenix.
2156
2157date (Loc.U):
5bf26616 2158 This variable is used internally by Configure to determine the
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2159 full pathname (if any) of the date program. After Configure runs,
2160 the value is reset to a plain "date" and is not useful.
2161
2162db_hashtype (i_db.U):
2163 This variable contains the type of the hash structure element
2164 in the <db.h> header file. In older versions of DB, it was
2165 int, while in newer ones it is u_int32_t.
2166
2167db_prefixtype (i_db.U):
2168 This variable contains the type of the prefix structure element
2169 in the <db.h> header file. In older versions of DB, it was
2170 int, while in newer ones it is size_t.
2171
640374d0
JH
2172db_version_major (i_db.U):
2173 This variable contains the major version number of
2174 Berkeley DB found in the <db.h> header file.
2175
2176db_version_minor (i_db.U):
2177 This variable contains the minor version number of
2178 Berkeley DB found in the <db.h> header file.
2179 For DB version 1 this is always 0.
2180
2181db_version_patch (i_db.U):
2182 This variable contains the patch version number of
2183 Berkeley DB found in the <db.h> header file.
2184 For DB version 1 this is always 0.
2185
781b178c
JH
2186defvoidused (voidflags.U):
2187 This variable contains the default value of the VOIDUSED symbol (15).
2188
2189direntrytype (i_dirent.U):
2190 This symbol is set to 'struct direct' or 'struct dirent' depending on
2191 whether dirent is available or not. You should use this pseudo type to
2192 portably declare your directory entries.
2193
2194dlext (dlext.U):
2195 This variable contains the extension that is to be used for the
2196 dynamically loaded modules that perl generaties.
2197
2198dlsrc (dlsrc.U):
2199 This variable contains the name of the dynamic loading file that
2200 will be used with the package.
2201
2202doublesize (doublesize.U):
2203 This variable contains the value of the DOUBLESIZE symbol, which
2204 indicates to the C program how many bytes there are in a double.
2205
2206drand01 (randfunc.U):
2207 Indicates the macro to be used to generate normalized
2208 random numbers. Uses randfunc, often divided by
2209 (double) (((unsigned long) 1 << randbits)) in order to
2210 normalize the result.
2211 In C programs, the macro 'Drand01' is mapped to drand01.
2212
10bc17b6
JH
2213drand48_r_proto (d_drand48_r.U):
2214 This variable encodes the prototype of drand48_r.
2215
781b178c
JH
2216dynamic_ext (Extensions.U):
2217 This variable holds a list of XS extension files we want to
2218 link dynamically into the package. It is used by Makefile.
2219
2220eagain (nblock_io.U):
2221 This variable bears the symbolic errno code set by read() when no
2222 data is present on the file and non-blocking I/O was enabled (otherwise,
2223 read() blocks naturally).
2224
2225ebcdic (ebcdic.U):
2226 This variable conditionally defines EBCDIC if this
2227 system uses EBCDIC encoding. Among other things, this
2228 means that the character ranges are not contiguous.
2229 See trnl.U
2230
2231echo (Loc.U):
5bf26616 2232 This variable is used internally by Configure to determine the
781b178c
JH
2233 full pathname (if any) of the echo program. After Configure runs,
2234 the value is reset to a plain "echo" and is not useful.
2235
2236egrep (Loc.U):
5bf26616 2237 This variable is used internally by Configure to determine the
781b178c
JH
2238 full pathname (if any) of the egrep program. After Configure runs,
2239 the value is reset to a plain "egrep" and is not useful.
2240
2241emacs (Loc.U):
2242 This variable is defined but not used by Configure.
2243 The value is a plain '' and is not useful.
2244
10bc17b6
JH
2245endgrent_r_proto (d_endgrent_r.U):
2246 This variable encodes the prototype of endgrent_r.
2247
2248endhostent_r_proto (d_endhostent_r.U):
2249 This variable encodes the prototype of endhostent_r.
2250
2251endnetent_r_proto (d_endnetent_r.U):
2252 This variable encodes the prototype of endnetent_r.
2253
2254endprotoent_r_proto (d_endprotoent_r.U):
2255 This variable encodes the prototype of endprotoent_r.
2256
2257endpwent_r_proto (d_endpwent_r.U):
2258 This variable encodes the prototype of endpwent_r.
2259
2260endservent_r_proto (d_endservent_r.U):
2261 This variable encodes the prototype of endservent_r.
2262
781b178c
JH
2263eunicefix (Init.U):
2264 When running under Eunice this variable contains a command which will
2265 convert a shell script to the proper form of text file for it to be
2266 executable by the shell. On other systems it is a no-op.
2267
2268exe_ext (Unix.U):
2269 This is an old synonym for _exe.
2270
2271expr (Loc.U):
5bf26616 2272 This variable is used internally by Configure to determine the
781b178c
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2273 full pathname (if any) of the expr program. After Configure runs,
2274 the value is reset to a plain "expr" and is not useful.
2275
2276extensions (Extensions.U):
2277 This variable holds a list of all extension files (both XS and
2278 non-xs linked into the package. It is propagated to Config.pm
2279 and is typically used to test whether a particular extesion
2280 is available.
2281
cb7ddd31
JH
2282extras (Extras.U):
2283 This variable holds a list of extra modules to install.
2284
781b178c
JH
2285fflushall (fflushall.U):
2286 This symbol, if defined, tells that to flush
2287 all pending stdio output one must loop through all
2288 the stdio file handles stored in an array and fflush them.
2289 Note that if fflushNULL is defined, fflushall will not
2290 even be probed for and will be left undefined.
2291
ff935051
JH
2292fflushNULL (fflushall.U):
2293 This symbol, if defined, tells that fflush(NULL) does flush
2294 all pending stdio output.
2295
781b178c 2296find (Loc.U):
ff935051
JH
2297 This variable is defined but not used by Configure.
2298 The value is a plain '' and is not useful.
781b178c
JH
2299
2300firstmakefile (Unix.U):
2301 This variable defines the first file searched by make. On unix,
2302 it is makefile (then Makefile). On case-insensitive systems,
2303 it might be something else. This is only used to deal with
2304 convoluted make depend tricks.
2305
2306flex (Loc.U):
2307 This variable is defined but not used by Configure.
2308 The value is a plain '' and is not useful.
2309
a22e52b9
JH
2310fpossize (fpossize.U):
2311 This variable contains the size of a fpostype in bytes.
2312
781b178c 2313fpostype (fpostype.U):
a22e52b9 2314 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2315 uint, or whatever type is used to declare file positions in libc.
2316
2317freetype (mallocsrc.U):
2318 This variable contains the return type of free(). It is usually
2319 void, but occasionally int.
2320
5440bc8e
JH
2321from (Cross.U):
2322 This variable contains the command used by Configure
2323 to copy files from the target host. Useful and available
2324 only during Perl build.
2325 The string ':' if not cross-compiling.
2326
781b178c
JH
2327full_ar (Loc_ar.U):
2328 This variable contains the full pathname to 'ar', whether or
2329 not the user has specified 'portability'. This is only used
2330 in the Makefile.SH.
2331
2332full_csh (d_csh.U):
2333 This variable contains the full pathname to 'csh', whether or
2334 not the user has specified 'portability'. This is only used
2335 in the compiled C program, and we assume that all systems which
2336 can share this executable will have the same full pathname to
2337 'csh.'
2338
2339full_sed (Loc_sed.U):
2340 This variable contains the full pathname to 'sed', whether or
2341 not the user has specified 'portability'. This is only used
2342 in the compiled C program, and we assume that all systems which
2343 can share this executable will have the same full pathname to
2344 'sed.'
2345
af960fef
JH
2346gccosandvers (gccvers.U):
2347 If GNU cc (gcc) is used, this variable the operating system and
2348 version used to compile the gcc. It is set to '' if not gcc,
2349 or if nothing useful can be parsed as the os version.
2350
2351gccversion (gccvers.U):
781b178c
JH
2352 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2353 indicate whether the compiler is version 1 or 2. This is used in
2354 setting some of the default cflags. It is set to '' if not gcc.
2355
10bc17b6
JH
2356getgrent_r_proto (d_getgrent_r.U):
2357 This variable encodes the prototype of getgrent_r.
2358
2359getgrgid_r_proto (d_getgrgid_r.U):
2360 This variable encodes the prototype of getgrgid_r.
2361
2362getgrnam_r_proto (d_getgrnam_r.U):
2363 This variable encodes the prototype of getgrnam_r.
2364
2365gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2366 This variable encodes the prototype of gethostbyaddr_r.
2367
2368gethostbyname_r_proto (d_gethostbyname_r.U):
2369 This variable encodes the prototype of gethostbyname_r.
2370
2371gethostent_r_proto (d_gethostent_r.U):
2372 This variable encodes the prototype of gethostent_r.
2373
2374getlogin_r_proto (d_getlogin_r.U):
2375 This variable encodes the prototype of getlogin_r.
2376
2377getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2378 This variable encodes the prototype of getnetbyaddr_r.
2379
2380getnetbyname_r_proto (d_getnetbyname_r.U):
2381 This variable encodes the prototype of getnetbyname_r.
2382
2383getnetent_r_proto (d_getnetent_r.U):
2384 This variable encodes the prototype of getnetent_r.
2385
2386getprotobyname_r_proto (d_getprotobyname_r.U):
2387 This variable encodes the prototype of getprotobyname_r.
2388
2389getprotobynumber_r_proto (d_getprotobynumber_r.U):
2390 This variable encodes the prototype of getprotobynumber_r.
2391
2392getprotoent_r_proto (d_getprotoent_r.U):
2393 This variable encodes the prototype of getprotoent_r.
2394
2395getpwent_r_proto (d_getpwent_r.U):
2396 This variable encodes the prototype of getpwent_r.
2397
2398getpwnam_r_proto (d_getpwnam_r.U):
2399 This variable encodes the prototype of getpwnam_r.
2400
2401getpwuid_r_proto (d_getpwuid_r.U):
2402 This variable encodes the prototype of getpwuid_r.
2403
2404getservbyname_r_proto (d_getservbyname_r.U):
2405 This variable encodes the prototype of getservbyname_r.
2406
2407getservbyport_r_proto (d_getservbyport_r.U):
2408 This variable encodes the prototype of getservbyport_r.
2409
2410getservent_r_proto (d_getservent_r.U):
2411 This variable encodes the prototype of getservent_r.
2412
2413getspnam_r_proto (d_getspnam_r.U):
2414 This variable encodes the prototype of getspnam_r.
2415
a22e52b9
JH
2416gidformat (gidf.U):
2417 This variable contains the format string used for printing a Gid_t.
2418
785fb66b
JH
2419gidsign (gidsign.U):
2420 This variable contains the signedness of a gidtype.
2421 1 for unsigned, -1 for signed.
2422
2423gidsize (gidsize.U):
2424 This variable contains the size of a gidtype in bytes.
2425
781b178c
JH
2426gidtype (gidtype.U):
2427 This variable defines Gid_t to be something like gid_t, int,
2428 ushort, or whatever type is used to declare the return type
2429 of getgid(). Typically, it is the type of group ids in the kernel.
2430
2431glibpth (libpth.U):
2432 This variable holds the general path (space-separated) used to
2433 find libraries. It may contain directories that do not exist on
2434 this platform, libpth is the cleaned-up version.
2435
c68a00c0
JH
2436gmake (Loc.U):
2437 This variable is used internally by Configure to determine the
2438 full pathname (if any) of the gmake program. After Configure runs,
2439 the value is reset to a plain "gmake" and is not useful.
2440
10bc17b6
JH
2441gmtime_r_proto (d_gmtime_r.U):
2442 This variable encodes the prototype of gmtime_r.
2443
781b178c 2444grep (Loc.U):
5bf26616 2445 This variable is used internally by Configure to determine the
781b178c
JH
2446 full pathname (if any) of the grep program. After Configure runs,
2447 the value is reset to a plain "grep" and is not useful.
2448
2449groupcat (nis.U):
2450 This variable contains a command that produces the text of the
2451 /etc/group file. This is normally "cat /etc/group", but can be
2452 "ypcat group" when NIS is used.
aaacdc8b
GS
2453 On some systems, such as os390, there may be no equivalent
2454 command, in which case this variable is unset.
781b178c
JH
2455
2456groupstype (groupstype.U):
2457 This variable defines Groups_t to be something like gid_t, int,
2458 ushort, or whatever type is used for the second argument to
2459 getgroups() and setgroups(). Usually, this is the same as
2460 gidtype (gid_t), but sometimes it isn't.
2461
2462gzip (Loc.U):
5bf26616 2463 This variable is used internally by Configure to determine the
781b178c
JH
2464 full pathname (if any) of the gzip program. After Configure runs,
2465 the value is reset to a plain "gzip" and is not useful.
2466
2467h_fcntl (h_fcntl.U):
2468 This is variable gets set in various places to tell i_fcntl that
2469 <fcntl.h> should be included.
2470
2471h_sysfile (h_sysfile.U):
2472 This is variable gets set in various places to tell i_sys_file that
2473 <sys/file.h> should be included.
2474
2475hint (Oldconfig.U):
2476 Gives the type of hints used for previous answers. May be one of
2477 "default", "recommended" or "previous".
2478
2479hostcat (nis.U):
2480 This variable contains a command that produces the text of the
2481 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2482 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2483 On some systems, such as os390, there may be no equivalent
2484 command, in which case this variable is unset.
781b178c 2485
a22e52b9
JH
2486i16size (perlxv.U):
2487 This variable is the size of an I16 in bytes.
2488
2489i16type (perlxv.U):
2490 This variable contains the C type used for Perl's I16.
2491
2492i32size (perlxv.U):
2493 This variable is the size of an I32 in bytes.
2494
2495i32type (perlxv.U):
2496 This variable contains the C type used for Perl's I32.
2497
2498i64size (perlxv.U):
2499 This variable is the size of an I64 in bytes.
2500
2501i64type (perlxv.U):
2502 This variable contains the C type used for Perl's I64.
2503
2504i8size (perlxv.U):
2505 This variable is the size of an I8 in bytes.
2506
2507i8type (perlxv.U):
2508 This variable contains the C type used for Perl's I8.
2509
781b178c
JH
2510i_arpainet (i_arpainet.U):
2511 This variable conditionally defines the I_ARPA_INET symbol,
2512 and indicates whether a C program should include <arpa/inet.h>.
2513
2514i_bsdioctl (i_sysioctl.U):
2515 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2516 indicates to the C program that <sys/bsdioctl.h> exists and should
2517 be included.
2518
10bc17b6
JH
2519i_crypt (i_crypt.U):
2520 This variable conditionally defines the I_CRYPT symbol, and indicates
2521 whether a C program should include <crypt.h>.
2522
781b178c
JH
2523i_db (i_db.U):
2524 This variable conditionally defines the I_DB symbol, and indicates
2525 whether a C program may include Berkeley's DB include file <db.h>.
2526
2527i_dbm (i_dbm.U):
2528 This variable conditionally defines the I_DBM symbol, which
2529 indicates to the C program that <dbm.h> exists and should
2530 be included.
2531
2532i_dirent (i_dirent.U):
2533 This variable conditionally defines I_DIRENT, which indicates
2534 to the C program that it should include <dirent.h>.
2535
2536i_dld (i_dld.U):
2537 This variable conditionally defines the I_DLD symbol, which
2538 indicates to the C program that <dld.h> (GNU dynamic loading)
2539 exists and should be included.
2540
2541i_dlfcn (i_dlfcn.U):
2542 This variable conditionally defines the I_DLFCN symbol, which
2543 indicates to the C program that <dlfcn.h> exists and should
2544 be included.
2545
2546i_fcntl (i_fcntl.U):
2547 This variable controls the value of I_FCNTL (which tells
2548 the C program to include <fcntl.h>).
2549
2550i_float (i_float.U):
2551 This variable conditionally defines the I_FLOAT symbol, and indicates
2552 whether a C program may include <float.h> to get symbols like DBL_MAX
2553 or DBL_MIN, i.e. machine dependent floating point values.
2554
758a5d79
JH
2555i_fp (i_fp.U):
2556 This variable conditionally defines the I_FP symbol, and indicates
2557 whether a C program should include <fp.h>.
2558
2559i_fp_class (i_fp_class.U):
2560 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2561 whether a C program should include <fp_class.h>.
2562
781b178c
JH
2563i_gdbm (i_gdbm.U):
2564 This variable conditionally defines the I_GDBM symbol, which
2565 indicates to the C program that <gdbm.h> exists and should
2566 be included.
2567
2568i_grp (i_grp.U):
2569 This variable conditionally defines the I_GRP symbol, and indicates
2570 whether a C program should include <grp.h>.
2571
792d8dab
JH
2572i_ieeefp (i_ieeefp.U):
2573 This variable conditionally defines the I_IEEEFP symbol, and indicates
2574 whether a C program should include <ieeefp.h>.
2575
781b178c
JH
2576i_inttypes (i_inttypes.U):
2577 This variable conditionally defines the I_INTTYPES symbol,
2578 and indicates whether a C program should include <inttypes.h>.
2579
2765b840
JH
2580i_langinfo (i_langinfo.U):
2581 This variable conditionally defines the I_LANGINFO symbol,
2582 and indicates whether a C program should include <langinfo.h>.
2583
af960fef
JH
2584i_libutil (i_libutil.U):
2585 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2586 whether a C program should include <libutil.h>.
2587
781b178c
JH
2588i_limits (i_limits.U):
2589 This variable conditionally defines the I_LIMITS symbol, and indicates
2590 whether a C program may include <limits.h> to get symbols like WORD_BIT
2591 and friends.
2592
2593i_locale (i_locale.U):
2594 This variable conditionally defines the I_LOCALE symbol,
2595 and indicates whether a C program should include <locale.h>.
2596
2597i_machcthr (i_machcthr.U):
2598 This variable conditionally defines the I_MACH_CTHREADS symbol,
2599 and indicates whether a C program should include <mach/cthreads.h>.
2600
2601i_malloc (i_malloc.U):
2602 This variable conditionally defines the I_MALLOC symbol, and indicates
2603 whether a C program should include <malloc.h>.
2604
2605i_math (i_math.U):
2606 This variable conditionally defines the I_MATH symbol, and indicates
2607 whether a C program may include <math.h>.
2608
2609i_memory (i_memory.U):
2610 This variable conditionally defines the I_MEMORY symbol, and indicates
2611 whether a C program should include <memory.h>.
2612
2613i_mntent (i_mntent.U):
2614 This variable conditionally defines the I_MNTENT symbol, and indicates
2615 whether a C program should include <mntent.h>.
2616
2617i_ndbm (i_ndbm.U):
2618 This variable conditionally defines the I_NDBM symbol, which
2619 indicates to the C program that <ndbm.h> exists and should
2620 be included.
2621
2622i_netdb (i_netdb.U):
2623 This variable conditionally defines the I_NETDB symbol, and indicates
2624 whether a C program should include <netdb.h>.
2625
2626i_neterrno (i_neterrno.U):
2627 This variable conditionally defines the I_NET_ERRNO symbol, which
2628 indicates to the C program that <net/errno.h> exists and should
2629 be included.
2630
2631i_netinettcp (i_netinettcp.U):
2632 This variable conditionally defines the I_NETINET_TCP symbol,
2633 and indicates whether a C program should include <netinet/tcp.h>.
2634
2635i_niin (i_niin.U):
2636 This variable conditionally defines I_NETINET_IN, which indicates
2637 to the C program that it should include <netinet/in.h>. Otherwise,
2638 you may try <sys/in.h>.
2639
2640i_poll (i_poll.U):
2641 This variable conditionally defines the I_POLL symbol, and indicates
2642 whether a C program should include <poll.h>.
2643
3813c136
JH
2644i_prot (i_prot.U):
2645 This variable conditionally defines the I_PROT symbol, and indicates
2646 whether a C program should include <prot.h>.
2647
781b178c 2648i_pthread (i_pthread.U):
190b66db 2649 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2650 and indicates whether a C program should include <pthread.h>.
2651
2652i_pwd (i_pwd.U):
2653 This variable conditionally defines I_PWD, which indicates
2654 to the C program that it should include <pwd.h>.
2655
2656i_rpcsvcdbm (i_dbm.U):
2657 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2658 indicates to the C program that <rpcsvc/dbm.h> exists and should
2659 be included. Some System V systems might need this instead of <dbm.h>.
2660
2661i_sfio (i_sfio.U):
2662 This variable conditionally defines the I_SFIO symbol,
2663 and indicates whether a C program should include <sfio.h>.
2664
2665i_sgtty (i_termio.U):
2666 This variable conditionally defines the I_SGTTY symbol, which
2667 indicates to the C program that it should include <sgtty.h> rather
2668 than <termio.h>.
2669
2670i_shadow (i_shadow.U):
2671 This variable conditionally defines the I_SHADOW symbol, and indicates
2672 whether a C program should include <shadow.h>.
2673
2674i_socks (i_socks.U):
2675 This variable conditionally defines the I_SOCKS symbol, and indicates
2676 whether a C program should include <socks.h>.
2677
2678i_stdarg (i_varhdr.U):
2679 This variable conditionally defines the I_STDARG symbol, which
2680 indicates to the C program that <stdarg.h> exists and should
2681 be included.
2682
2683i_stddef (i_stddef.U):
2684 This variable conditionally defines the I_STDDEF symbol, which
2685 indicates to the C program that <stddef.h> exists and should
2686 be included.
2687
2688i_stdlib (i_stdlib.U):
2689 This variable conditionally defines the I_STDLIB symbol, which
2690 indicates to the C program that <stdlib.h> exists and should
2691 be included.
2692
2693i_string (i_string.U):
2694 This variable conditionally defines the I_STRING symbol, which
2695 indicates that <string.h> should be included rather than <strings.h>.
2696
792d8dab
JH
2697i_sunmath (i_sunmath.U):
2698 This variable conditionally defines the I_SUNMATH symbol, and indicates
2699 whether a C program should include <sunmath.h>.
2700
781b178c
JH
2701i_sysaccess (i_sysaccess.U):
2702 This variable conditionally defines the I_SYS_ACCESS symbol,
2703 and indicates whether a C program should include <sys/access.h>.
2704
2705i_sysdir (i_sysdir.U):
2706 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2707 whether a C program should include <sys/dir.h>.
2708
2709i_sysfile (i_sysfile.U):
2710 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2711 whether a C program should include <sys/file.h> to get R_OK and friends.
2712
2713i_sysfilio (i_sysioctl.U):
2714 This variable conditionally defines the I_SYS_FILIO symbol, which
2715 indicates to the C program that <sys/filio.h> exists and should
2716 be included in preference to <sys/ioctl.h>.
2717
2718i_sysin (i_niin.U):
2719 This variable conditionally defines I_SYS_IN, which indicates
2720 to the C program that it should include <sys/in.h> instead of
2721 <netinet/in.h>.
2722
2723i_sysioctl (i_sysioctl.U):
2724 This variable conditionally defines the I_SYS_IOCTL symbol, which
2725 indicates to the C program that <sys/ioctl.h> exists and should
2726 be included.
2727
ca52efda
JH
2728i_syslog (i_syslog.U):
2729 This variable conditionally defines the I_SYSLOG symbol,
2730 and indicates whether a C program should include <syslog.h>.
2731
fe749a9f
JH
2732i_sysmman (i_sysmman.U):
2733 This variable conditionally defines the I_SYS_MMAN symbol, and
2734 indicates whether a C program should include <sys/mman.h>.
2735
87b71857
JH
2736i_sysmode (i_sysmode.U):
2737 This variable conditionally defines the I_SYSMODE symbol,
2738 and indicates whether a C program should include <sys/mode.h>.
2739
781b178c
JH
2740i_sysmount (i_sysmount.U):
2741 This variable conditionally defines the I_SYSMOUNT symbol,
2742 and indicates whether a C program should include <sys/mount.h>.
2743
2744i_sysndir (i_sysndir.U):
2745 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2746 whether a C program should include <sys/ndir.h>.
2747
2748i_sysparam (i_sysparam.U):
2749 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2750 whether a C program should include <sys/param.h>.
2751
2752i_sysresrc (i_sysresrc.U):
2753 This variable conditionally defines the I_SYS_RESOURCE symbol,
2754 and indicates whether a C program should include <sys/resource.h>.
2755
2756i_syssecrt (i_syssecrt.U):
2757 This variable conditionally defines the I_SYS_SECURITY symbol,
2758 and indicates whether a C program should include <sys/security.h>.
2759
2760i_sysselct (i_sysselct.U):
2761 This variable conditionally defines I_SYS_SELECT, which indicates
2762 to the C program that it should include <sys/select.h> in order to
2763 get the definition of struct timeval.
2764
2765i_syssockio (i_sysioctl.U):
2766 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2767 C program that socket ioctl codes may be found in <sys/sockio.h>
2768 instead of <sys/ioctl.h>.
2769
2770i_sysstat (i_sysstat.U):
2771 This variable conditionally defines the I_SYS_STAT symbol,
2772 and indicates whether a C program should include <sys/stat.h>.
2773
0545a864
JH
2774i_sysstatfs (i_sysstatfs.U):
2775 This variable conditionally defines the I_SYSSTATFS symbol,
2776 and indicates whether a C program should include <sys/statfs.h>.
2777
781b178c
JH
2778i_sysstatvfs (i_sysstatvfs.U):
2779 This variable conditionally defines the I_SYSSTATVFS symbol,
2780 and indicates whether a C program should include <sys/statvfs.h>.
2781
2782i_systime (i_time.U):
2783 This variable conditionally defines I_SYS_TIME, which indicates
2784 to the C program that it should include <sys/time.h>.
2785
2786i_systimek (i_time.U):
2787 This variable conditionally defines I_SYS_TIME_KERNEL, which
2788 indicates to the C program that it should include <sys/time.h>
2789 with KERNEL defined.
2790
2791i_systimes (i_systimes.U):
2792 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2793 whether a C program should include <sys/times.h>.
2794
2795i_systypes (i_systypes.U):
2796 This variable conditionally defines the I_SYS_TYPES symbol,
2797 and indicates whether a C program should include <sys/types.h>.
2798
2799i_sysuio (i_sysuio.U):
2800 This variable conditionally defines the I_SYSUIO symbol, and indicates
2801 whether a C program should include <sys/uio.h>.
2802
2803i_sysun (i_sysun.U):
2804 This variable conditionally defines I_SYS_UN, which indicates
2805 to the C program that it should include <sys/un.h> to get UNIX
2806 domain socket definitions.
2807
d4935d7f
JH
2808i_sysutsname (i_sysutsname.U):
2809 This variable conditionally defines the I_SYSUTSNAME symbol,
2810 and indicates whether a C program should include <sys/utsname.h>.
2811
0545a864
JH
2812i_sysvfs (i_sysvfs.U):
2813 This variable conditionally defines the I_SYSVFS symbol,
2814 and indicates whether a C program should include <sys/vfs.h>.
2815
781b178c
JH
2816i_syswait (i_syswait.U):
2817 This variable conditionally defines I_SYS_WAIT, which indicates
2818 to the C program that it should include <sys/wait.h>.
2819
2820i_termio (i_termio.U):
2821 This variable conditionally defines the I_TERMIO symbol, which
2822 indicates to the C program that it should include <termio.h> rather
2823 than <sgtty.h>.
2824
2825i_termios (i_termio.U):
2826 This variable conditionally defines the I_TERMIOS symbol, which
2827 indicates to the C program that the POSIX <termios.h> file is
2828 to be included.
2829
2830i_time (i_time.U):
2831 This variable conditionally defines I_TIME, which indicates
2832 to the C program that it should include <time.h>.
2833
2834i_unistd (i_unistd.U):
2835 This variable conditionally defines the I_UNISTD symbol, and indicates
2836 whether a C program should include <unistd.h>.
2837
0545a864
JH
2838i_ustat (i_ustat.U):
2839 This variable conditionally defines the I_USTAT symbol, and indicates
2840 whether a C program should include <ustat.h>.
2841
781b178c
JH
2842i_utime (i_utime.U):
2843 This variable conditionally defines the I_UTIME symbol, and indicates
2844 whether a C program should include <utime.h>.
2845
2846i_values (i_values.U):
2847 This variable conditionally defines the I_VALUES symbol, and indicates
2848 whether a C program may include <values.h> to get symbols like MAXLONG
2849 and friends.
2850
2851i_varargs (i_varhdr.U):
2852 This variable conditionally defines I_VARARGS, which indicates
2853 to the C program that it should include <varargs.h>.
2854
2855i_varhdr (i_varhdr.U):
2856 Contains the name of the header to be included to get va_dcl definition.
2857 Typically one of varargs.h or stdarg.h.
2858
2859i_vfork (i_vfork.U):
2860 This variable conditionally defines the I_VFORK symbol, and indicates
2861 whether a C program should include vfork.h.
2862
2863ignore_versioned_solibs (libs.U):
2864 This variable should be non-empty if non-versioned shared
2865 libraries (libfoo.so.x.y) are to be ignored (because they
2866 cannot be linked against).
2867
ff935051
JH
2868inc_version_list (inc_version_list.U):
2869 This variable specifies the list of subdirectories in over
2870 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
2871 search when adding directories to @INC. The elements in
2872 the list are separated by spaces. This is only useful
ff935051
JH
2873 if you have a perl library directory tree structured like the
2874 default one. See INSTALL for how this works. The versioned
2875 site_perl directory was introduced in 5.005, so that is the
2876 lowest possible value.
2877
3a096bf3
JH
2878inc_version_list_init (inc_version_list.U):
2879 This variable holds the same list as inc_version_list, but
2880 each item is enclosed in double quotes and separated by commas,
2881 suitable for use in the PERL_INC_VERSION_LIST initialization.
2882
781b178c 2883incpath (usrinc.U):
209e5c0a
JH
2884 This variable must preceed the normal include path to get hte
2885 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
2886 Value can be "" or "/bsd43" on mips.
2887
2888inews (Loc.U):
2889 This variable is defined but not used by Configure.
2890 The value is a plain '' and is not useful.
2891
2892installarchlib (archlib.U):
2893 This variable is really the same as archlibexp but may differ on
2894 those systems using AFS. For extra portability, only this variable
2895 should be used in makefiles.
2896
2897installbin (bin.U):
2898 This variable is the same as binexp unless AFS is running in which case
2899 the user is explicitely prompted for it. This variable should always
2900 be used in your makefiles for maximum portability.
2901
2902installman1dir (man1dir.U):
2903 This variable is really the same as man1direxp, unless you are using
2904 AFS in which case it points to the read/write location whereas
2905 man1direxp only points to the read-only access location. For extra
2906 portability, you should only use this variable within your makefiles.
2907
2908installman3dir (man3dir.U):
2909 This variable is really the same as man3direxp, unless you are using
2910 AFS in which case it points to the read/write location whereas
2911 man3direxp only points to the read-only access location. For extra
2912 portability, you should only use this variable within your makefiles.
2913
2914installprefix (installprefix.U):
2915 This variable holds the name of the directory below which
2916 "make install" will install the package. For most users, this
2917 is the same as prefix. However, it is useful for
2918 installing the software into a different (usually temporary)
2919 location after which it can be bundled up and moved somehow
2920 to the final location specified by prefix.
2921
2922installprefixexp (installprefix.U):
2923 This variable holds the full absolute path of installprefix
2924 with all ~-expansion done.
2925
2926installprivlib (privlib.U):
2927 This variable is really the same as privlibexp but may differ on
2928 those systems using AFS. For extra portability, only this variable
2929 should be used in makefiles.
2930
2931installscript (scriptdir.U):
2932 This variable is usually the same as scriptdirexp, unless you are on
2933 a system running AFS, in which case they may differ slightly. You
2934 should always use this variable within your makefiles for portability.
2935
2936installsitearch (sitearch.U):
2937 This variable is really the same as sitearchexp but may differ on
2938 those systems using AFS. For extra portability, only this variable
2939 should be used in makefiles.
2940
0617aed7
JH
2941installsitebin (sitebin.U):
2942 This variable is usually the same as sitebinexp, unless you are on
2943 a system running AFS, in which case they may differ slightly. You
2944 should always use this variable within your makefiles for portability.
2945
781b178c
JH
2946installsitelib (sitelib.U):
2947 This variable is really the same as sitelibexp but may differ on
2948 those systems using AFS. For extra portability, only this variable
2949 should be used in makefiles.
2950
2951installstyle (installstyle.U):
2952 This variable describes the "style" of the perl installation.
2953 This is intended to be useful for tools that need to
2954 manipulate entire perl distributions. Perl itself doesn't use
2955 this to find its libraries -- the library directories are
2956 stored directly in Config.pm. Currently, there are only two
2957 styles: "lib" and "lib/perl5". The default library locations
2958 (e.g. privlib, sitelib) are either $prefix/lib or
2959 $prefix/lib/perl5. The former is useful if $prefix is a
2960 directory dedicated to perl (e.g. /opt/perl), while the latter
2961 is useful if $prefix is shared by many packages, e.g. if
2962 $prefix=/usr/local.
2963 This may later be extended to include other information, so
2964 be careful with pattern-matching on the results.
2965 For compatibility with perl5.005 and earlier, the default
2966 setting is based on whether or not $prefix contains the string
2967 "perl".
2968
2969installusrbinperl (instubperl.U):
2970 This variable tells whether Perl should be installed also as
2971 /usr/bin/perl in addition to
2972 $installbin/perl
2973
526fdc24
MS
2974installvendorarch (vendorarch.U):
2975 This variable is really the same as vendorarchexp but may differ on
2976 those systems using AFS. For extra portability, only this variable
2977 should be used in makefiles.
2978
0617aed7
JH
2979installvendorbin (vendorbin.U):
2980 This variable is really the same as vendorbinexp but may differ on
2981 those systems using AFS. For extra portability, only this variable
2982 should be used in makefiles.
2983
a3635516
JH
2984installvendorlib (vendorlib.U):
2985 This variable is really the same as vendorlibexp but may differ on
2986 those systems using AFS. For extra portability, only this variable
2987 should be used in makefiles.
2988
781b178c
JH
2989intsize (intsize.U):
2990 This variable contains the value of the INTSIZE symbol, which
2991 indicates to the C program how many bytes there are in an int.
2992
4b661809 2993issymlink (issymlink.U):
983dbef6
JH
2994 This variable holds the test command to test for a symbolic link
2995 (if they are supported). Typical values include 'test -h' and
2996 'test -L'.
4b661809 2997
a22e52b9
JH
2998ivdformat (perlxvf.U):
2999 This variable contains the format string used for printing
3000 a Perl IV as a signed decimal integer.
3001
3002ivsize (perlxv.U):
3003 This variable is the size of an IV in bytes.
3004
3005ivtype (perlxv.U):
3006 This variable contains the C type used for Perl's IV.
3007
781b178c
JH
3008known_extensions (Extensions.U):
3009 This variable holds a list of all XS extensions included in
3010 the package.
3011
3012ksh (Loc.U):
3013 This variable is defined but not used by Configure.
3014 The value is a plain '' and is not useful.
3015
781b178c
JH
3016ld (dlsrc.U):
3017 This variable indicates the program to be used to link
3018 libraries for dynamic loading. On some systems, it is 'ld'.
3019 On ELF systems, it should be $cc. Mostly, we'll try to respect
3020 the hint file setting.
3021
3022lddlflags (dlsrc.U):
3023 This variable contains any special flags that might need to be
3024 passed to $ld to create a shared library suitable for dynamic
3025 loading. It is up to the makefile to use it. For hpux, it
3026 should be '-b'. For sunos 4.1, it is empty.
3027
3028ldflags (ccflags.U):
3029 This variable contains any additional C loader flags desired by
3030 the user. It is up to the Makefile to use this.
3031
af960fef
JH
3032ldflags_uselargefiles (uselfs.U):
3033 This variable contains the loader flags needed by large file builds
3034 and added to ldflags by hints files.
3035
781b178c
JH
3036ldlibpthname (libperl.U):
3037 This variable holds the name of the shared library
3038 search path, often LD_LIBRARY_PATH. To get an empty
3039 string, the hints file must set this to 'none'.
3040
3041less (Loc.U):
5bf26616 3042 This variable is used internally by Configure to determine the
781b178c
JH
3043 full pathname (if any) of the less program. After Configure runs,
3044 the value is reset to a plain "less" and is not useful.
3045
3046lib_ext (Unix.U):
3047 This is an old synonym for _a.
3048
3049libc (libc.U):
3050 This variable contains the location of the C library.
3051
3052libperl (libperl.U):
3053 The perl executable is obtained by linking perlmain.c with
3054 libperl, any static extensions (usually just DynaLoader),
3055 and any other libraries needed on this system. libperl
3056 is usually libperl.a, but can also be libperl.so.xxx if
3057 the user wishes to build a perl executable with a shared
3058 library.
3059
3060libpth (libpth.U):
3061 This variable holds the general path (space-separated) used to find
3062 libraries. It is intended to be used by other units.
3063
3064libs (libs.U):
3065 This variable holds the additional libraries we want to use.
9285ede2 3066 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3067
fe749a9f
JH
3068libsdirs (libs.U):
3069 This variable holds the directory names aka dirnames of the libraries
3070 we found and accepted, duplicates are removed.
3071
3072libsfiles (libs.U):
3073 This variable holds the filenames aka basenames of the libraries
3074 we found and accepted.
3075
3076libsfound (libs.U):
3077 This variable holds the full pathnames of the libraries
3078 we found and accepted.
3079
13b3f787
JH
3080libspath (libs.U):
3081 This variable holds the directory names probed for libraries.
3082
781b178c
JH
3083libswanted (Myinit.U):
3084 This variable holds a list of all the libraries we want to
3085 search. The order is chosen to pick up the c library
3086 ahead of ucb or bsd libraries for SVR4.
3087
af960fef
JH
3088libswanted_uselargefiles (uselfs.U):
3089 This variable contains the libraries needed by large file builds
3090 and added to ldflags by hints files. It is a space separated list
3091 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3092 like libswanted..
af960fef 3093
781b178c 3094line (Loc.U):
ff935051
JH
3095 This variable is defined but not used by Configure.
3096 The value is a plain '' and is not useful.
781b178c
JH
3097
3098lint (Loc.U):
3099 This variable is defined but not used by Configure.
3100 The value is a plain '' and is not useful.
3101
3102lkflags (ccflags.U):
3103 This variable contains any additional C partial linker flags desired by
3104 the user. It is up to the Makefile to use this.
3105
3106ln (Loc.U):
5bf26616 3107 This variable is used internally by Configure to determine the
781b178c
JH
3108 full pathname (if any) of the ln program. After Configure runs,
3109 the value is reset to a plain "ln" and is not useful.
3110
3111lns (lns.U):
3112 This variable holds the name of the command to make
3113 symbolic links (if they are supported). It can be used
3114 in the Makefile. It is either 'ln -s' or 'ln'
3115
10bc17b6
JH
3116localtime_r_proto (d_localtime_r.U):
3117 This variable encodes the prototype of localtime_r.
3118
781b178c
JH
3119locincpth (ccflags.U):
3120 This variable contains a list of additional directories to be
3121 searched by the compiler. The appropriate '-I' directives will
3122 be added to ccflags. This is intended to simplify setting
3123 local directories from the Configure command line.
3124 It's not much, but it parallels the loclibpth stuff in libpth.U.
3125
3126loclibpth (libpth.U):
3127 This variable holds the paths (space-separated) used to find local
3128 libraries. It is prepended to libpth, and is intended to be easily
3129 set from the command line.
3130
3131longdblsize (d_longdbl.U):
3132 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3133 indicates to the C program how many bytes there are in a long double,
3134 if this system supports long doubles.
3135
3136longlongsize (d_longlong.U):
3137 This variable contains the value of the LONGLONGSIZE symbol, which
3138 indicates to the C program how many bytes there are in a long long,
3139 if this system supports long long.
3140
3141longsize (intsize.U):
3142 This variable contains the value of the LONGSIZE symbol, which
3143 indicates to the C program how many bytes there are in a long.
3144
3145lp (Loc.U):
3146 This variable is defined but not used by Configure.
3147 The value is a plain '' and is not useful.
3148
3149lpr (Loc.U):
3150 This variable is defined but not used by Configure.
3151 The value is a plain '' and is not useful.
3152
3153ls (Loc.U):
5bf26616 3154 This variable is used internally by Configure to determine the
781b178c
JH
3155 full pathname (if any) of the ls program. After Configure runs,
3156 the value is reset to a plain "ls" and is not useful.
3157
3158lseeksize (lseektype.U):
3159 This variable defines lseektype to be something like off_t, long,
3160 or whatever type is used to declare lseek offset's type in the
3161 kernel (which also appears to be lseek's return type).
3162
3163lseektype (lseektype.U):
3164 This variable defines lseektype to be something like off_t, long,
3165 or whatever type is used to declare lseek offset's type in the
3166 kernel (which also appears to be lseek's return type).
3167
3168mail (Loc.U):
3169 This variable is defined but not used by Configure.
3170 The value is a plain '' and is not useful.
3171
3172mailx (Loc.U):
3173 This variable is defined but not used by Configure.
3174 The value is a plain '' and is not useful.
3175
3176make (Loc.U):
5bf26616 3177 This variable is used internally by Configure to determine the
c532c9d1
JH
3178 full pathname (if any) of the make program. After Configure runs,
3179 the value is reset to a plain "make" and is not useful.
3180
781b178c
JH
3181make_set_make (make.U):
3182 Some versions of 'make' set the variable MAKE. Others do not.
3183 This variable contains the string to be included in Makefile.SH
3184 so that MAKE is set if needed, and not if not needed.
3185 Possible values are:
3186 make_set_make='#' # If your make program handles this for you,
3187 make_set_make="MAKE=$make" # if it doesn't.
3188 I used a comment character so that we can distinguish a
3189 'set' value (from a previous config.sh or Configure '-D' option)
3190 from an uncomputed value.
3191
3192mallocobj (mallocsrc.U):
3193 This variable contains the name of the malloc.o that this package
3194 generates, if that malloc.o is preferred over the system malloc.
3195 Otherwise the value is null. This variable is intended for generating
3196 Makefiles. See mallocsrc.
3197
3198mallocsrc (mallocsrc.U):
3199 This variable contains the name of the malloc.c that comes with
3200 the package, if that malloc.c is preferred over the system malloc.
3201 Otherwise the value is null. This variable is intended for generating
3202 Makefiles.
3203
3204malloctype (mallocsrc.U):
3205 This variable contains the kind of ptr returned by malloc and realloc.
3206
3207man1dir (man1dir.U):
3208 This variable contains the name of the directory in which manual
3209 source pages are to be put. It is the responsibility of the
3210 Makefile.SH to get the value of this into the proper command.
3211 You must be prepared to do the ~name expansion yourself.
3212
3213man1direxp (man1dir.U):
3214 This variable is the same as the man1dir variable, but is filename
3215 expanded at configuration time, for convenient use in makefiles.
3216
3217man1ext (man1dir.U):
3218 This variable contains the extension that the manual page should
3219 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3220 See man1dir.
3221
3222man3dir (man3dir.U):
3223 This variable contains the name of the directory in which manual
3224 source pages are to be put. It is the responsibility of the
3225 Makefile.SH to get the value of this into the proper command.
3226 You must be prepared to do the ~name expansion yourself.
3227
3228man3direxp (man3dir.U):
3229 This variable is the same as the man3dir variable, but is filename
3230 expanded at configuration time, for convenient use in makefiles.
3231
3232man3ext (man3dir.U):
3233 This variable contains the extension that the manual page should
3234 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3235 See man3dir.
3236
ff935051
JH
3237Mcc (Loc.U):
3238 This variable is used internally by Configure to determine the
3239 full pathname (if any) of the Mcc program. After Configure runs,
3240 the value is reset to a plain "Mcc" and is not useful.
3241
781b178c
JH
3242mips_type (usrinc.U):
3243 This variable holds the environment type for the mips system.
3244 Possible values are "BSD 4.3" and "System V".
3245
3246mkdir (Loc.U):
5bf26616 3247 This variable is used internally by Configure to determine the
781b178c
JH
3248 full pathname (if any) of the mkdir program. After Configure runs,
3249 the value is reset to a plain "mkdir" and is not useful.
3250
fe749a9f
JH
3251mmaptype (d_mmap.U):
3252 This symbol contains the type of pointer returned by mmap()
3253 (and simultaneously the type of the first argument).
3254 It can be 'void *' or 'caddr_t'.
3255
781b178c
JH
3256modetype (modetype.U):
3257 This variable defines modetype to be something like mode_t,
3258 int, unsigned short, or whatever type is used to declare file
3259 modes for system calls.
3260
3261more (Loc.U):
5bf26616 3262 This variable is used internally by Configure to determine the
781b178c
JH
3263 full pathname (if any) of the more program. After Configure runs,
3264 the value is reset to a plain "more" and is not useful.
3265
3266multiarch (multiarch.U):
3267 This variable conditionally defines the MULTIARCH symbol
3268 which signifies the presence of multiplatform files.
3269 This is normally set by hints files.
3270
3271mv (Loc.U):
3272 This variable is defined but not used by Configure.
3273 The value is a plain '' and is not useful.
3274
3275myarchname (archname.U):
3276 This variable holds the architecture name computed by Configure in
3277 a previous run. It is not intended to be perused by any user and
3278 should never be set in a hint file.
3279
3280mydomain (myhostname.U):
3281 This variable contains the eventual value of the MYDOMAIN symbol,
3282 which is the domain of the host the program is going to run on.
3283 The domain must be appended to myhostname to form a complete host name.
3284 The dot comes with mydomain, and need not be supplied by the program.
3285
3286myhostname (myhostname.U):
3287 This variable contains the eventual value of the MYHOSTNAME symbol,
3288 which is the name of the host the program is going to run on.
3289 The domain is not kept with hostname, but must be gotten from mydomain.
3290 The dot comes with mydomain, and need not be supplied by the program.
3291
3292myuname (Oldconfig.U):
3293 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3294 pseudo variables assignments in the output are stripped, thank you. The
3295 whole thing is then lower-cased.
3296
3297n (n.U):
3298 This variable contains the '-n' flag if that is what causes the echo
3299 command to suppress newline. Otherwise it is null. Correct usage is
3300 $echo $n "prompt for a question: $c".
3301
2cc61e15
DD
3302need_va_copy (need_va_copy.U):
3303 This symbol, if defined, indicates that the system stores
3304 the variable argument list datatype, va_list, in a format
3305 that cannot be copied by simple assignment, so that some
3306 other means must be used when copying is required.
3307 As such systems vary in their provision (or non-provision)
3308 of copying mechanisms, handy.h defines a platform-
3309 independent macro, Perl_va_copy(src, dst), to do the job.
3310
781b178c
JH
3311netdb_hlen_type (netdbtype.U):
3312 This variable holds the type used for the 2nd argument to
3313 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3314 This is only useful if you have gethostbyaddr(), naturally.
3315
3316netdb_host_type (netdbtype.U):
3317 This variable holds the type used for the 1st argument to
3318 gethostbyaddr(). Usually, this is char * or void *, possibly
3319 with or without a const prefix.
3320 This is only useful if you have gethostbyaddr(), naturally.
3321
3322netdb_name_type (netdbtype.U):
3323 This variable holds the type used for the argument to
3324 gethostbyname(). Usually, this is char * or const char *.
3325 This is only useful if you have gethostbyname(), naturally.
3326
3327netdb_net_type (netdbtype.U):
3328 This variable holds the type used for the 1st argument to
3329 getnetbyaddr(). Usually, this is int or long.
3330 This is only useful if you have getnetbyaddr(), naturally.
3331
3332nm (Loc.U):
5bf26616 3333 This variable is used internally by Configure to determine the
781b178c
JH
3334 full pathname (if any) of the nm program. After Configure runs,
3335 the value is reset to a plain "nm" and is not useful.
3336
3337nm_opt (usenm.U):
3338 This variable holds the options that may be necessary for nm.
3339
3340nm_so_opt (usenm.U):
3341 This variable holds the options that may be necessary for nm
3342 to work on a shared library but that can not be used on an
3343 archive library. Currently, this is only used by Linux, where
3344 nm --dynamic is *required* to get symbols from an ELF library which
3345 has been stripped, but nm --dynamic is *fatal* on an archive library.
3346 Maybe Linux should just always set usenm=false.
3347
3348nonxs_ext (Extensions.U):
3349 This variable holds a list of all non-xs extensions included
3350 in the package. All of them will be built.
3351
3352nroff (Loc.U):
5bf26616 3353 This variable is used internally by Configure to determine the
781b178c
JH
3354 full pathname (if any) of the nroff program. After Configure runs,
3355 the value is reset to a plain "nroff" and is not useful.
3356
2f12987e
JH
3357nv_preserves_uv_bits (perlxv.U):
3358 This variable indicates how many of bits type uvtype
3359 a variable nvtype can preserve.
3360
6b4667fc
A
3361nveformat (perlxvf.U):
3362 This variable contains the format string used for printing
3363 a Perl NV using %e-ish floating point format.
3364
6b356c8e 3365nvEUformat (perlxvf.U):
6b4667fc
A
3366 This variable contains the format string used for printing
3367 a Perl NV using %E-ish floating point format.
3368
3369nvfformat (perlxvf.U):
3370 This variable confains the format string used for printing
3371 a Perl NV using %f-ish floating point format.
3372
6b356c8e 3373nvFUformat (perlxvf.U):
6b4667fc
A
3374 This variable confains the format string used for printing
3375 a Perl NV using %F-ish floating point format.
3376
3377nvgformat (perlxvf.U):
3378 This variable contains the format string used for printing
3379 a Perl NV using %g-ish floating point format.
3380
6b356c8e 3381nvGUformat (perlxvf.U):
6b4667fc
A
3382 This variable contains the format string used for printing
3383 a Perl NV using %G-ish floating point format.
3384
a22e52b9
JH
3385nvsize (perlxv.U):
3386 This variable is the size of an NV in bytes.
3387
3388nvtype (perlxv.U):
3389 This variable contains the C type used for Perl's NV.
3390
781b178c
JH
3391o_nonblock (nblock_io.U):
3392 This variable bears the symbol value to be used during open() or fcntl()
3393 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3394 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3395 but that is only supported by some devices.
3396
3397obj_ext (Unix.U):
3398 This is an old synonym for _o.
3399
3400old_pthread_create_joinable (d_pthrattrj.U):
3401 This variable defines the constant to use for creating joinable
3402 (aka undetached) pthreads. Unused if pthread.h defines
3403 PTHREAD_CREATE_JOINABLE. If used, possible values are
3404 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3405
3406optimize (ccflags.U):
3407 This variable contains any optimizer/debugger flag that should be used.
3408 It is up to the Makefile to use it.
3409
3410orderlib (orderlib.U):
3411 This variable is "true" if the components of libraries must be ordered
3412 (with `lorder $* | tsort`) before placing them in an archive. Set to
3413 "false" if ranlib or ar can generate random libraries.
3414
3415osname (Oldconfig.U):
3416 This variable contains the operating system name (e.g. sunos,
3417 solaris, hpux, etc.). It can be useful later on for setting
3418 defaults. Any spaces are replaced with underscores. It is set
3419 to a null string if we can't figure it out.
3420
3421osvers (Oldconfig.U):
3422 This variable contains the operating system version (e.g.
3423 4.1.3, 5.2, etc.). It is primarily used for helping select
3424 an appropriate hints file, but might be useful elsewhere for
3425 setting defaults. It is set to '' if we can't figure it out.
3426 We try to be flexible about how much of the version number
3427 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3428 same for this package, hints files might just be os_4.0 or
3429 os_4.1, etc., not keeping separate files for each little release.
3430
3b777bb4
GS
3431otherlibdirs (otherlibdirs.U):
3432 This variable contains a colon-separated set of paths for the perl
3433 binary to search for additional library files or modules.
3434 These directories will be tacked to the end of @INC.
3435 Perl will automatically search below each path for version-
3436 and architecture-specific directories. See inc_version_list
3437 for more details.
3438 A value of ' ' means 'none' and is used to preserve this value
3439 for the next run through Configure.
3440
781b178c
JH
3441package (package.U):
3442 This variable contains the name of the package being constructed.
3443 It is primarily intended for the use of later Configure units.
3444
3445pager (pager.U):
3446 This variable contains the name of the preferred pager on the system.
3447 Usual values are (the full pathnames of) more, less, pg, or cat.
3448
3449passcat (nis.U):
3450 This variable contains a command that produces the text of the
3451 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3452 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3453 On some systems, such as os390, there may be no equivalent
3454 command, in which case this variable is unset.
781b178c
JH
3455
3456patchlevel (patchlevel.U):
3457 The patchlevel level of this package.
3458 The value of patchlevel comes from the patchlevel.h file.
ff935051 3459 In a version number such as 5.6.1, this is the "6".
c890dc6c 3460 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3461
3462path_sep (Unix.U):
3463 This is an old synonym for p_ in Head.U, the character
3464 used to separate elements in the command shell search PATH.
3465
c890dc6c
JH
3466perl5 (perl5.U):
3467 This variable contains the full path (if any) to a previously
3468 installed perl5.005 or later suitable for running the script
3469 to determine inc_version_list.
3470
781b178c 3471perl (Loc.U):
c890dc6c
JH
3472 This variable is defined but not used by Configure.
3473 The value is a plain '' and is not useful.
781b178c 3474
a6d26a0d
JH
3475perl_patchlevel (patchlevel.U):
3476 This is the Perl patch level, a numeric change identifier,
3477 as defined by whichever source code maintenance system
3478 is used to maintain the patches; currently Perforce.
3479 It does not correlate with the Perl version numbers or
3480 the maintenance versus development dichotomy except
3481 by also being increasing.
3482
ff935051
JH
3483PERL_REVISION (Oldsyms.U):
3484 In a Perl version number such as 5.6.2, this is the 5.
3485 This value is manually set in patchlevel.h
3486
3487PERL_SUBVERSION (Oldsyms.U):
3488 In a Perl version number such as 5.6.2, this is the 2.
3489 Values greater than 50 represent potentially unstable
3490 development subversions.
3491 This value is manually set in patchlevel.h
3492
3493PERL_VERSION (Oldsyms.U):
3494 In a Perl version number such as 5.6.2, this is the 6.
3495 This value is manually set in patchlevel.h
3496
781b178c
JH
3497perladmin (perladmin.U):
3498 Electronic mail address of the perl5 administrator.
3499
b7a73309
JH
3500perllibs (End.U):
3501 The list of libraries needed by Perl only (any libraries needed
3502 by extensions only will by dropped, if using dynamic loading).
3503
781b178c
JH
3504perlpath (perlpath.U):
3505 This variable contains the eventual value of the PERLPATH symbol,
3506 which contains the name of the perl interpreter to be used in
3507 shell scripts and in the "eval 'exec'" idiom.
3508
3509pg (Loc.U):
5bf26616 3510 This variable is used internally by Configure to determine the
781b178c
JH
3511 full pathname (if any) of the pg program. After Configure runs,
3512 the value is reset to a plain "pg" and is not useful.
3513
3514phostname (myhostname.U):
3515 This variable contains the eventual value of the PHOSTNAME symbol,
3516 which is a command that can be fed to popen() to get the host name.
3517 The program should probably not presume that the domain is or isn't
3518 there already.
3519
3520pidtype (pidtype.U):
3521 This variable defines PIDTYPE to be something like pid_t, int,
3522 ushort, or whatever type is used to declare process ids in the kernel.
3523
3524plibpth (libpth.U):
3525 Holds the private path used by Configure to find out the libraries.
3526 Its value is prepend to libpth. This variable takes care of special
3527 machines, like the mips. Usually, it should be empty.
3528
fe749a9f
JH
3529pm_apiversion (xs_apiversion.U):
3530 This variable contains the version of the oldest perl
3531 compatible with the present perl. (That is, pure perl modules
3532 written for $pm_apiversion will still work for the current
3533 version). perl.c:incpush() and lib/lib.pm will automatically
3534 search in $sitelib for older directories across major versions
3535 back to pm_apiversion. This is only useful if you have a perl
3536 library directory tree structured like the default one. The
3537 versioned site_perl library was introduced in 5.005, so that's
3538 the default setting for this variable. It's hard to imagine
3539 it changing before Perl6. It is included here for symmetry
3540 with xs_apiveprsion -- the searching algorithms will
3541 (presumably) be similar.
3542 See the INSTALL file for how this works.
3543
781b178c
JH
3544pmake (Loc.U):
3545 This variable is defined but not used by Configure.
3546 The value is a plain '' and is not useful.
3547
3548pr (Loc.U):
3549 This variable is defined but not used by Configure.
3550 The value is a plain '' and is not useful.
3551
3552prefix (prefix.U):
3553 This variable holds the name of the directory below which the
3554 user will install the package. Usually, this is /usr/local, and
3555 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3556 man pages in /usr/local/man, etc. It is only used to set defaults
3557 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3558
3559prefixexp (prefix.U):
3560 This variable holds the full absolute path of the directory below
3561 which the user will install the package. Derived from prefix.
3562
3563privlib (privlib.U):
3564 This variable contains the eventual value of the PRIVLIB symbol,
3565 which is the name of the private library for this package. It may
3566 have a ~ on the front. It is up to the makefile to eventually create
3567 this directory while performing installation (with ~ substitution).
3568
3569privlibexp (privlib.U):
3570 This variable is the ~name expanded version of privlib, so that you
3571 may use it directly in Makefiles or shell scripts.
3572
428dc699
JH
3573procselfexe (d_procselfexe.U):
3574 If d_procselfexe is defined, $procselfexe is the filename
3575 of the symbolic link pointing to the absolute pathname of
3576 the executing program.
3577
781b178c
JH
3578prototype (prototype.U):
3579 This variable holds the eventual value of CAN_PROTOTYPE, which
3580 indicates the C compiler can handle funciton prototypes.
3581
3582ptrsize (ptrsize.U):
3583 This variable contains the value of the PTRSIZE symbol, which
3584 indicates to the C program how many bytes there are in a pointer.
3585
e0a10278 3586quadkind (quadtype.U):
0befd8de
JH
3587 This variable, if defined, encodes the type of a quad:
3588 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3589
3590quadtype (quadtype.U):
3591 This variable defines Quad_t to be something like long, int,
3592 long long, int64_t, or whatever type is used for 64-bit integers.
3593
781b178c
JH
3594randbits (randfunc.U):
3595 Indicates how many bits are produced by the function used to
3596 generate normalized random numbers.
3597
3598randfunc (randfunc.U):
3599 Indicates the name of the random number function to use.
3600 Values include drand48, random, and rand. In C programs,
3601 the 'Drand01' macro is defined to generate uniformly distributed
3602 random numbers over the range [0., 1.[ (see drand01 and nrand).
3603
10bc17b6
JH
3604random_r_proto (d_random_r.U):
3605 This variable encodes the prototype of random_r.
3606
781b178c
JH
3607randseedtype (randfunc.U):
3608 Indicates the type of the argument of the seedfunc.
3609
3610ranlib (orderlib.U):
3611 This variable is set to the pathname of the ranlib program, if it is
3612 needed to generate random libraries. Set to ":" if ar can generate
3613 random libraries or if random libraries are not supported
3614
3615rd_nodata (nblock_io.U):
3616 This variable holds the return code from read() when no data is
3617 present. It should be -1, but some systems return 0 when O_NDELAY is
3618 used, which is a shame because you cannot make the difference between
209e5c0a 3619 no data and an EOF.. Sigh!
781b178c 3620
10bc17b6
JH
3621readdir64_r_proto (d_readdir64_r.U):
3622 This variable encodes the prototype of readdir64_r.
3623
3624readdir_r_proto (d_readdir_r.U):
3625 This variable encodes the prototype of readdir_r.
3626
c890dc6c
JH
3627revision (patchlevel.U):
3628 The value of revision comes from the patchlevel.h file.
3629 In a version number such as 5.6.1, this is the "5".
3630 In patchlevel.h, this is referred to as "PERL_REVISION".
3631
781b178c 3632rm (Loc.U):
5bf26616 3633 This variable is used internally by Configure to determine the
781b178c
JH
3634 full pathname (if any) of the rm program. After Configure runs,
3635 the value is reset to a plain "rm" and is not useful.
3636
3637rmail (Loc.U):
3638 This variable is defined but not used by Configure.
3639 The value is a plain '' and is not useful.
3640
5440bc8e
JH
3641run (Cross.U):
3642 This variable contains the command used by Configure
3643 to copy and execute a cross-compiled executable in the
3644 target host. Useful and available only during Perl build.
3645 Empty string '' if not cross-compiling.
3646
781b178c
JH
3647runnm (usenm.U):
3648 This variable contains 'true' or 'false' depending whether the
3649 nm extraction should be performed or not, according to the value
3650 of usenm and the flags on the Configure command line.
3651
3652sched_yield (d_pthread_y.U):
3653 This variable defines the way to yield the execution
3654 of the current thread.
3655
3656scriptdir (scriptdir.U):
3657 This variable holds the name of the directory in which the user wants
3658 to put publicly scripts for the package in question. It is either
3659 the same directory as for binaries, or a special one that can be
3660 mounted across different architectures, like /usr/share. Programs
3661 must be prepared to deal with ~name expansion.
3662
3663scriptdirexp (scriptdir.U):
3664 This variable is the same as scriptdir, but is filename expanded
3665 at configuration time, for programs not wanting to bother with it.
3666
3667sed (Loc.U):
5bf26616 3668 This variable is used internally by Configure to determine the
781b178c
JH
3669 full pathname (if any) of the sed program. After Configure runs,
3670 the value is reset to a plain "sed" and is not useful.
3671
3672seedfunc (randfunc.U):
3673 Indicates the random number generating seed function.
3674 Values include srand48, srandom, and srand.
3675
3676selectminbits (selectminbits.U):
3677 This variable holds the minimum number of bits operated by select.
3678 That is, if you do select(n, ...), how many bits at least will be
3679 cleared in the masks if some activity is detected. Usually this
3680 is either n or 32*ceil(n/32), especially many little-endians do
3681 the latter. This is only useful if you have select(), naturally.
3682
3683selecttype (selecttype.U):
3684 This variable holds the type used for the 2nd, 3rd, and 4th
3685 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3686 is defined, and 'int *' otherwise. This is only useful if you
3687 have select(), naturally.
3688
3689sendmail (Loc.U):
ff935051
JH
3690 This variable is defined but not used by Configure.
3691 The value is a plain '' and is not useful.
781b178c 3692
10bc17b6
JH
3693setgrent_r_proto (d_setgrent_r.U):
3694 This variable encodes the prototype of setgrent_r.
3695
3696sethostent_r_proto (d_sethostent_r.U):
3697 This variable encodes the prototype of sethostent_r.
3698
3699setlocale_r_proto (d_setlocale_r.U):
3700 This variable encodes the prototype of setlocale_r.
3701
3702setnetent_r_proto (d_setnetent_r.U):
3703 This variable encodes the prototype of setnetent_r.
3704
3705setprotoent_r_proto (d_setprotoent_r.U):
3706 This variable encodes the prototype of setprotoent_r.
3707
3708setpwent_r_proto (d_setpwent_r.U):
3709 This variable encodes the prototype of setpwent_r.
3710
3711setservent_r_proto (d_setservent_r.U):
3712 This variable encodes the prototype of setservent_r.
3713
781b178c
JH
3714sh (sh.U):
3715 This variable contains the full pathname of the shell used
3716 on this system to execute Bourne shell scripts. Usually, this will be
3717 /bin/sh, though it's possible that some systems will have /bin/ksh,
3718 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3719 D:/bin/sh.exe.
3720 This unit comes before Options.U, so you can't set sh with a '-D'
3721 option, though you can override this (and startsh)
3722 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3723
3724shar (Loc.U):
3725 This variable is defined but not used by Configure.
3726 The value is a plain '' and is not useful.
3727
3728sharpbang (spitshell.U):
3729 This variable contains the string #! if this system supports that
3730 construct.
3731
3732shmattype (d_shmat.U):
3733 This symbol contains the type of pointer returned by shmat().
3734 It can be 'void *' or 'char *'.
3735
3736shortsize (intsize.U):
3737 This variable contains the value of the SHORTSIZE symbol which
3738 indicates to the C program how many bytes there are in a short.
3739
3740shrpenv (libperl.U):
3741 If the user builds a shared libperl.so, then we need to tell the
3742 'perl' executable where it will be able to find the installed libperl.so.
3743 One way to do this on some systems is to set the environment variable
3744 LD_RUN_PATH to the directory that will be the final location of the
3745 shared libperl.so. The makefile can use this with something like
3746 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3747 Typical values are
3748 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3749 or
3750 shrpenv=''
3751 See the main perl Makefile.SH for actual working usage.
3752 Alternatively, we might be able to use a command line option such
c68a00c0 3753 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
781b178c
JH
3754 $archlibexp/CORE (Linux).
3755
3756shsharp (spitshell.U):
3757 This variable tells further Configure units whether your sh can
3758 handle # comments.
3759
3760sig_count (sig_name.U):
3761 This variable holds a number larger than the largest valid
3762 signal number. This is usually the same as the NSIG macro.
3763
3764sig_name (sig_name.U):
3765 This variable holds the signal names, space separated. The leading
3766 SIG in signal name is removed. A ZERO is prepended to the
3767 list. This is currently not used.
3768
3769sig_name_init (sig_name.U):
3770 This variable holds the signal names, enclosed in double quotes and
3771 separated by commas, suitable for use in the SIG_NAME definition
3772 below. A "ZERO" is prepended to the list, and the list is
3773 terminated with a plain 0. The leading SIG in signal names
3774 is removed. See sig_num.
3775
3776sig_num (sig_name.U):
3777 This variable holds the signal numbers, space separated. A ZERO is
3778 prepended to the list (corresponding to the fake SIGZERO), and
3779 the list is terminated with a 0. Those numbers correspond to
3780 the value of the signal listed in the same place within the
3781 sig_name list.
3782
3783sig_num_init (sig_name.U):
3784 This variable holds the signal numbers, enclosed in double quotes and
3785 separated by commas, suitable for use in the SIG_NUM definition
3786 below. A "ZERO" is prepended to the list, and the list is
3787 terminated with a plain 0.
3788
76d3c696
JH
3789sig_size (sig_name.U):
3790 This variable contains the number of elements of the sig_name
8966e0c4 3791 and sig_num arrays, excluding the final NULL entry.
76d3c696 3792
781b178c
JH
3793signal_t (d_voidsig.U):
3794 This variable holds the type of the signal handler (void or int).
3795
3796sitearch (sitearch.U):
3797 This variable contains the eventual value of the SITEARCH symbol,
3798 which is the name of the private library for this package. It may
3799 have a ~ on the front. It is up to the makefile to eventually create
3800 this directory while performing installation (with ~ substitution).
f868067f
JH
3801 The standard distribution will put nothing in this directory.
3802 After perl has been installed, users may install their own local
3803 architecture-dependent modules in this directory with
3804 MakeMaker Makefile.PL
3805 or equivalent. See INSTALL for details.
781b178c
JH
3806
3807sitearchexp (sitearch.U):
3808 This variable is the ~name expanded version of sitearch, so that you
3809 may use it directly in Makefiles or shell scripts.
3810
0617aed7
JH
3811sitebin (sitebin.U):
3812 This variable holds the name of the directory in which the user wants
3813 to put add-on publicly executable files for the package in question. It
3814 is most often a local directory such as /usr/local/bin. Programs using
3815 this variable must be prepared to deal with ~name substitution.
f868067f
JH
3816 The standard distribution will put nothing in this directory.
3817 After perl has been installed, users may install their own local
3818 executables in this directory with
3819 MakeMaker Makefile.PL
3820 or equivalent. See INSTALL for details.
0617aed7
JH
3821
3822sitebinexp (sitebin.U):
3823 This is the same as the sitebin variable, but is filename expanded at
3824 configuration time, for use in your makefiles.
3825
781b178c
JH
3826sitelib (sitelib.U):
3827 This variable contains the eventual value of the SITELIB symbol,
3828 which is the name of the private library for this package. It may
3829 have a ~ on the front. It is up to the makefile to eventually create
3830 this directory while performing installation (with ~ substitution).
f868067f
JH
3831 The standard distribution will put nothing in this directory.
3832 After perl has been installed, users may install their own local
3833 architecture-independent modules in this directory with
3834 MakeMaker Makefile.PL
3835 or equivalent. See INSTALL for details.
781b178c 3836
526fdc24
MS
3837sitelib_stem (sitelib.U):
3838 This variable is $sitelibexp with any trailing version-specific component
3839 removed. The elements in inc_version_list (inc_version_list.U) can
3840 be tacked onto this variable to generate a list of directories to search.
3841
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3842sitelibexp (sitelib.U):
3843 This variable is the ~name expanded version of sitelib, so that you
3844 may use it directly in Makefiles or shell scripts.
3845
3846siteprefix (siteprefix.U):
3847 This variable holds the full absolute path of the directory below
3848 which the user will install add-on packages.
f868067f 3849 See INSTALL for usage and examples.
781b178c
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3850
3851siteprefixexp (siteprefix.U):
3852 This variable holds the full absolute path of the directory below
3853 which the user will install add-on packages. Derived from siteprefix.
3854
a13ea748
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3855sizesize (sizesize.U):
3856 This variable contains the size of a sizetype in bytes.
3857
781b178c
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3858sizetype (sizetype.U):
3859 This variable defines sizetype to be something like size_t,
3860 unsigned long, or whatever type is used to declare length
3861 parameters for string functions.
3862
3863sleep (Loc.U):
3864 This variable is defined but not used by Configure.
3865 The value is a plain '' and is not useful.
3866
3867smail (Loc.U):
3868 This variable is defined but not used by Configure.
3869 The value is a plain '' and is not useful.
3870
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3871so (so.U):
3872 This variable holds the extension used to identify shared libraries
3873 (also known as shared objects) on the system. Usually set to 'so'.
3874
3875sockethdr (d_socket.U):
3876 This variable has any cpp '-I' flags needed for socket support.
3877
3878socketlib (d_socket.U):
3879 This variable has the names of any libraries needed for socket support.
3880
c890dc6c
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3881socksizetype (socksizetype.U):
3882 This variable holds the type used for the size argument
3883 for various socket calls like accept. Usual values include
3884 socklen_t, size_t, and int.
3885
781b178c 3886sort (Loc.U):
5bf26616 3887 This variable is used internally by Configure to determine the
781b178c
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3888 full pathname (if any) of the sort program. After Configure runs,
3889 the value is reset to a plain "sort" and is not useful.
3890
3891spackage (package.U):
3892 This variable contains the name of the package being constructed,
3893 with the first letter uppercased, i.e. suitable for starting
3894 sentences.
3895
3896spitshell (spitshell.U):
3897 This variable contains the command necessary to spit out a runnable
3898 shell on this system. It is either cat or a grep '-v' for # comments.
3899
ff935051
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3900sPRId64 (quadfio.U):
3901 This variable, if defined, contains the string used by stdio to
3902 format 64-bit decimal numbers (format 'd') for output.
3903
3904sPRIeldbl (longdblfio.U):
3905 This variable, if defined, contains the string used by stdio to
3906 format long doubles (format 'e') for output.
3907
6b356c8e 3908sPRIEUldbl (longdblfio.U):
ff935051
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3909 This variable, if defined, contains the string used by stdio to
3910 format long doubles (format 'E') for output.
6b356c8e
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3911 The 'U' in the name is to separate this from sPRIeldbl so that even
3912 case-blind systems can see the difference.
ff935051
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3913
3914sPRIfldbl (longdblfio.U):
3915 This variable, if defined, contains the string used by stdio to
3916 format long doubles (format 'f') for output.
3917
6b356c8e 3918sPRIFUldbl (longdblfio.U):
ff935051
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3919 This variable, if defined, contains the string used by stdio to
3920 format long doubles (format 'F') for output.
6b356c8e
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3921 The 'U' in the name is to separate this from sPRIfldbl so that even
3922 case-blind systems can see the difference.
ff935051
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3923
3924sPRIgldbl (longdblfio.U):
3925 This variable, if defined, contains the string used by stdio to
3926 format long doubles (format 'g') for output.
3927
6b356c8e 3928sPRIGUldbl (longdblfio.U):
ff935051
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3929 This variable, if defined, contains the string used by stdio to
3930 format long doubles (format 'G') for output.
6b356c8e
JH
3931 The 'U' in the name is to separate this from sPRIgldbl so that even
3932 case-blind systems can see the difference.
ff935051
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3933
3934sPRIi64 (quadfio.U):
3935 This variable, if defined, contains the string used by stdio to
3936 format 64-bit decimal numbers (format 'i') for output.
3937
3938sPRIo64 (quadfio.U):
3939 This variable, if defined, contains the string used by stdio to
3940 format 64-bit octal numbers (format 'o') for output.
3941
3942sPRIu64 (quadfio.U):
3943 This variable, if defined, contains the string used by stdio to
3944 format 64-bit unsigned decimal numbers (format 'u') for output.
3945
3946sPRIx64 (quadfio.U):
3947 This variable, if defined, contains the string used by stdio to
3948 format 64-bit hexadecimal numbers (format 'x') for output.
3949
6b356c8e 3950sPRIXU64 (quadfio.U):
ff935051
JH
3951 This variable, if defined, contains the string used by stdio to
3952 format 64-bit hExADECimAl numbers (format 'X') for output.
6b356c8e
JH
3953 The 'U' in the name is to separate this from sPRIx64 so that even
3954 case-blind systems can see the difference.
ff935051 3955
10bc17b6
JH
3956srand48_r_proto (d_srand48_r.U):
3957 This variable encodes the prototype of srand48_r.
3958
3959srandom_r_proto (d_srandom_r.U):
3960 This variable encodes the prototype of srandom_r.
3961
781b178c
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3962src (src.U):
3963 This variable holds the path to the package source. It is up to
3964 the Makefile to use this variable and set VPATH accordingly to
3965 find the sources remotely.
3966
6b356c8e
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3967sSCNfldbl (longdblfio.U):
3968 This variable, if defined, contains the string used by stdio to
3969 format long doubles (format 'f') for input.
3970
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3971ssizetype (ssizetype.U):
3972 This variable defines ssizetype to be something like ssize_t,
3973 long or int. It is used by functions that return a count
3974 of bytes or an error condition. It must be a signed type.
3975 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3976
3977startperl (startperl.U):
3978 This variable contains the string to put on the front of a perl
3979 script to make sure (hopefully) that it runs with perl and not some
3980 shell. Of course, that leading line must be followed by the classical
3981 perl idiom:
3982 eval 'exec perl -S $0 ${1+"$@"}'
3983 if $running_under_some_shell;
3984 to guarantee perl startup should the shell execute the script. Note
3985 that this magic incatation is not understood by csh.
3986
3987startsh (startsh.U):
3988 This variable contains the string to put on the front of a shell
3989 script to make sure (hopefully) that it runs with sh and not some
3990 other shell.
3991
3992static_ext (Extensions.U):
3993 This variable holds a list of XS extension files we want to
3994 link statically into the package. It is used by Makefile.
3995
3996stdchar (stdchar.U):
3997 This variable conditionally defines STDCHAR to be the type of char
3998 used in stdio.h. It has the values "unsigned char" or "char".
3999
4000stdio_base (d_stdstdio.U):
4001 This variable defines how, given a FILE pointer, fp, to access the
4002 _base field (or equivalent) of stdio.h's FILE structure. This will
4003 be used to define the macro FILE_base(fp).
4004
4005stdio_bufsiz (d_stdstdio.U):
4006 This variable defines how, given a FILE pointer, fp, to determine
4007 the number of bytes store in the I/O buffer pointer to by the
4008 _base field (or equivalent) of stdio.h's FILE structure. This will
4009 be used to define the macro FILE_bufsiz(fp).
4010
4011stdio_cnt (d_stdstdio.U):
4012 This variable defines how, given a FILE pointer, fp, to access the
4013 _cnt field (or equivalent) of stdio.h's FILE structure. This will
4014 be used to define the macro FILE_cnt(fp).
4015
4016stdio_filbuf (d_stdstdio.U):
4017 This variable defines how, given a FILE pointer, fp, to tell
022735b4 4018 stdio to refill its internal buffers (?). This will
781b178c
JH
4019 be used to define the macro FILE_filbuf(fp).
4020
4021stdio_ptr (d_stdstdio.U):
4022 This variable defines how, given a FILE pointer, fp, to access the
4023 _ptr field (or equivalent) of stdio.h's FILE structure. This will
4024 be used to define the macro FILE_ptr(fp).
4025
4026stdio_stream_array (stdio_streams.U):
4027 This variable tells the name of the array holding the stdio streams.
4028 Usual values include _iob, __iob, and __sF.
4029
10bc17b6
JH
4030strerror_r_proto (d_strerror_r.U):
4031 This variable encodes the prototype of strerror_r.
4032
781b178c
JH
4033strings (i_string.U):
4034 This variable holds the full path of the string header that will be
4035 used. Typically /usr/include/string.h or /usr/include/strings.h.