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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.
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125 It is zero if d_asctime_r is undef, and one of the
126 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
127 is defined.
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781b178c 129awk (Loc.U):
5bf26616 130 This variable is used internally by Configure to determine the
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131 full pathname (if any) of the awk program. After Configure runs,
132 the value is reset to a plain "awk" and is not useful.
133
134baserev (baserev.U):
135 The base revision level of this package, from the .package file.
136
137bash (Loc.U):
138 This variable is defined but not used by Configure.
139 The value is a plain '' and is not useful.
140
141bin (bin.U):
142 This variable holds the name of the directory in which the user wants
143 to put publicly executable images for the package in question. It
144 is most often a local directory such as /usr/local/bin. Programs using
145 this variable must be prepared to deal with ~name substitution.
146
147binexp (bin.U):
148 This is the same as the bin variable, but is filename expanded at
149 configuration time, for use in your makefiles.
150
151bison (Loc.U):
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152 This variable is used internally by Configure to determine the
153 full pathname (if any) of the bison program. After Configure runs,
154 the value is reset to a plain "bison" and is not useful.
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155
156byacc (Loc.U):
5bf26616 157 This variable is used internally by Configure to determine the
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158 full pathname (if any) of the byacc program. After Configure runs,
159 the value is reset to a plain "byacc" and is not useful.
160
161byteorder (byteorder.U):
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162 This variable holds the byte order in a UV. In the following,
163 larger digits indicate more significance. The variable byteorder
164 is either 4321 on a big-endian machine, or 1234 on a little-endian,
165 or 87654321 on a Cray ... or 3412 with weird order !
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166
167c (n.U):
168 This variable contains the \c string if that is what causes the echo
169 command to suppress newline. Otherwise it is null. Correct usage is
170 $echo $n "prompt for a question: $c".
171
172castflags (d_castneg.U):
173 This variable contains a flag that precise difficulties the
174 compiler has casting odd floating values to unsigned long:
175 0 = ok
176 1 = couldn't cast < 0
177 2 = couldn't cast >= 0x80000000
178 4 = couldn't cast in argument expression list
179
180cat (Loc.U):
5bf26616 181 This variable is used internally by Configure to determine the
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182 full pathname (if any) of the cat program. After Configure runs,
183 the value is reset to a plain "cat" and is not useful.
184
185cc (cc.U):
186 This variable holds the name of a command to execute a C compiler which
187 can resolve multiple global references that happen to have the same
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188 name. Usual values are 'cc' and 'gcc'.
189 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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190
191cccdlflags (dlsrc.U):
192 This variable contains any special flags that might need to be
193 passed with 'cc -c' to compile modules to be used to create a shared
194 library that will be used for dynamic loading. For hpux, this
195 should be +z. It is up to the makefile to use it.
196
197ccdlflags (dlsrc.U):
198 This variable contains any special flags that might need to be
199 passed to cc to link with a shared library for dynamic loading.
200 It is up to the makefile to use it. For sunos 4.1, it should
201 be empty.
202
203ccflags (ccflags.U):
204 This variable contains any additional C compiler flags desired by
205 the user. It is up to the Makefile to use this.
206
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207ccflags_uselargefiles (uselfs.U):
208 This variable contains the compiler flags needed by large file builds
209 and added to ccflags by hints files.
210
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211ccname (Checkcc.U):
212 This can set either by hints files or by Configure. If using
213 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
214 Some platforms, however, make good use of this by storing the
215 flavor of the C compiler being used here. For example if using
216 the Sun WorkShop suite, ccname will be 'workshop'.
217
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218ccsymbols (Cppsym.U):
219 The variable contains the symbols defined by the C compiler alone.
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220 The symbols defined by cpp or by cc when it calls cpp are not in
221 this list, see cppsymbols and cppccsymbols.
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222 The list is a space-separated list of symbol=value tokens.
223
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224ccversion (Checkcc.U):
225 This can set either by hints files or by Configure. If using
226 a (non-gcc) vendor cc, this variable may contain a version for
227 the compiler.
228
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229cf_by (cf_who.U):
230 Login name of the person who ran the Configure script and answered the
231 questions. This is used to tag both config.sh and config_h.SH.
232
233cf_email (cf_email.U):
234 Electronic mail address of the person who ran Configure. This can be
235 used by units that require the user's e-mail, like MailList.U.
236
237cf_time (cf_who.U):
238 Holds the output of the "date" command when the configuration file was
239 produced. This is used to tag both config.sh and config_h.SH.
240
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241charsize (charsize.U):
242 This variable contains the value of the CHARSIZE symbol, which
243 indicates to the C program how many bytes there are in a character.
244
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245chgrp (Loc.U):
246 This variable is defined but not used by Configure.
247 The value is a plain '' and is not useful.
248
249chmod (Loc.U):
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250 This variable is used internally by Configure to determine the
251 full pathname (if any) of the chmod program. After Configure runs,
252 the value is reset to a plain "chmod" and is not useful.
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253
254chown (Loc.U):
255 This variable is defined but not used by Configure.
256 The value is a plain '' and is not useful.
257
258clocktype (d_times.U):
259 This variable holds the type returned by times(). It can be long,
260 or clock_t on BSD sites (in which case <sys/types.h> should be
261 included).
262
263comm (Loc.U):
5bf26616 264 This variable is used internally by Configure to determine the
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265 full pathname (if any) of the comm program. After Configure runs,
266 the value is reset to a plain "comm" and is not useful.
267
268compress (Loc.U):
269 This variable is defined but not used by Configure.
270 The value is a plain '' and is not useful.
271
272contains (contains.U):
273 This variable holds the command to do a grep with a proper return
274 status. On most sane systems it is simply "grep". On insane systems
275 it is a grep followed by a cat followed by a test. This variable
276 is primarily for the use of other Configure units.
277
278cp (Loc.U):
5bf26616 279 This variable is used internally by Configure to determine the
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280 full pathname (if any) of the cp program. After Configure runs,
281 the value is reset to a plain "cp" and is not useful.
282
283cpio (Loc.U):
284 This variable is defined but not used by Configure.
285 The value is a plain '' and is not useful.
286
287cpp (Loc.U):
5bf26616 288 This variable is used internally by Configure to determine the
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289 full pathname (if any) of the cpp program. After Configure runs,
290 the value is reset to a plain "cpp" and is not useful.
291
292cpp_stuff (cpp_stuff.U):
293 This variable contains an identification of the catenation mechanism
294 used by the C preprocessor.
295
296cppccsymbols (Cppsym.U):
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297 The variable contains the symbols defined by the C compiler
298 when it calls cpp. The symbols defined by the cc alone or cpp
299 alone are not in this list, see ccsymbols and cppsymbols.
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300 The list is a space-separated list of symbol=value tokens.
301
302cppflags (ccflags.U):
303 This variable holds the flags that will be passed to the C pre-
304 processor. It is up to the Makefile to use it.
305
306cpplast (cppstdin.U):
307 This variable has the same functionality as cppminus, only it applies
308 to cpprun and not cppstdin.
309
310cppminus (cppstdin.U):
311 This variable contains the second part of the string which will invoke
312 the C preprocessor on the standard input and produce to standard
313 output. This variable will have the value "-" if cppstdin needs
314 a minus to specify standard input, otherwise the value is "".
315
316cpprun (cppstdin.U):
317 This variable contains the command which will invoke a C preprocessor
318 on standard input and put the output to stdout. It is guaranteed not
319 to be a wrapper and may be a null string if no preprocessor can be
320 made directly available. This preprocessor might be different from the
321 one used by the C compiler. Don't forget to append cpplast after the
322 preprocessor options.
323
324cppstdin (cppstdin.U):
325 This variable contains the command which will invoke the C
326 preprocessor on standard input and put the output to stdout.
327 It is primarily used by other Configure units that ask about
328 preprocessor symbols.
329
330cppsymbols (Cppsym.U):
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331 The variable contains the symbols defined by the C preprocessor
332 alone. The symbols defined by cc or by cc when it calls cpp are
333 not in this list, see ccsymbols and cppccsymbols.
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334 The list is a space-separated list of symbol=value tokens.
335
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336crypt_r_proto (d_crypt_r.U):
337 This variable encodes the prototype of crypt_r.
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338 It is zero if d_crypt_r is undef, and one of the
339 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
340 is defined.
10bc17b6 341
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342cryptlib (d_crypt.U):
343 This variable holds -lcrypt or the path to a libcrypt.a archive if
344 the crypt() function is not defined in the standard C library. It is
345 up to the Makefile to use this.
346
347csh (Loc.U):
5bf26616 348 This variable is used internally by Configure to determine the
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349 full pathname (if any) of the csh program. After Configure runs,
350 the value is reset to a plain "csh" and is not useful.
351
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352ctermid_r_proto (d_ctermid_r.U):
353 This variable encodes the prototype of ctermid_r.
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354 It is zero if d_ctermid_r is undef, and one of the
355 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
356 is defined.
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357
358ctime_r_proto (d_ctime_r.U):
359 This variable encodes the prototype of ctime_r.
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360 It is zero if d_ctime_r is undef, and one of the
361 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
362 is defined.
10bc17b6 363
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364d__fwalk (d__fwalk.U):
365 This variable conditionally defines HAS__FWALK if _fwalk() is
366 available to apply a function to all the file handles.
367
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368d_access (d_access.U):
369 This variable conditionally defines HAS_ACCESS if the access() system
370 call is available to check for access permissions using real IDs.
371
372d_accessx (d_accessx.U):
373 This variable conditionally defines the HAS_ACCESSX symbol, which
374 indicates to the C program that the accessx() routine is available.
375
376d_alarm (d_alarm.U):
377 This variable conditionally defines the HAS_ALARM symbol, which
378 indicates to the C program that the alarm() routine is available.
379
380d_archlib (archlib.U):
381 This variable conditionally defines ARCHLIB to hold the pathname
382 of architecture-dependent library files for $package. If
383 $archlib is the same as $privlib, then this is set to undef.
384
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385d_asctime_r (d_asctime_r.U):
386 This variable conditionally defines the HAS_ASCTIME_R symbol,
387 which indicates to the C program that the asctime_r()
388 routine is available.
389
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390d_atolf (atolf.U):
391 This variable conditionally defines the HAS_ATOLF symbol, which
392 indicates to the C program that the atolf() routine is available.
393
394d_atoll (atoll.U):
395 This variable conditionally defines the HAS_ATOLL symbol, which
396 indicates to the C program that the atoll() routine is available.
397
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398d_attribut (d_attribut.U):
399 This variable conditionally defines HASATTRIBUTE, which
400 indicates the C compiler can check for function attributes,
401 such as printf formats.
402
403d_bcmp (d_bcmp.U):
404 This variable conditionally defines the HAS_BCMP symbol if
405 the bcmp() routine is available to compare strings.
406
407d_bcopy (d_bcopy.U):
408 This variable conditionally defines the HAS_BCOPY symbol if
409 the bcopy() routine is available to copy strings.
410
411d_bsd (Guess.U):
412 This symbol conditionally defines the symbol BSD when running on a
413 BSD system.
414
415d_bsdgetpgrp (d_getpgrp.U):
416 This variable conditionally defines USE_BSD_GETPGRP if
417 getpgrp needs one arguments whereas USG one needs none.
418
419d_bsdsetpgrp (d_setpgrp.U):
420 This variable conditionally defines USE_BSD_SETPGRP if
421 setpgrp needs two arguments whereas USG one needs none.
422 See also d_setpgid for a POSIX interface.
423
424d_bzero (d_bzero.U):
425 This variable conditionally defines the HAS_BZERO symbol if
426 the bzero() routine is available to set memory to 0.
427
428d_casti32 (d_casti32.U):
429 This variable conditionally defines CASTI32, which indicates
430 whether the C compiler can cast large floats to 32-bit ints.
431
432d_castneg (d_castneg.U):
433 This variable conditionally defines CASTNEG, which indicates
434 wether the C compiler can cast negative float to unsigned.
435
436d_charvspr (d_vprintf.U):
437 This variable conditionally defines CHARVSPRINTF if this system
438 has vsprintf returning type (char*). The trend seems to be to
439 declare it as "int vsprintf()".
440
441d_chown (d_chown.U):
442 This variable conditionally defines the HAS_CHOWN symbol, which
443 indicates to the C program that the chown() routine is available.
444
445d_chroot (d_chroot.U):
446 This variable conditionally defines the HAS_CHROOT symbol, which
447 indicates to the C program that the chroot() routine is available.
448
449d_chsize (d_chsize.U):
450 This variable conditionally defines the CHSIZE symbol, which
451 indicates to the C program that the chsize() routine is available
452 to truncate files. You might need a -lx to get this routine.
453
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454d_class (d_class.U):
455 This variable conditionally defines the HAS_CLASS symbol, which
456 indicates to the C program that the class() routine is available.
457
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458d_closedir (d_closedir.U):
459 This variable conditionally defines HAS_CLOSEDIR if closedir() is
460 available.
461
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462d_cmsghdr_s (d_cmsghdr_s.U):
463 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
464 which indicates that the struct cmsghdr is supported.
465
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466d_const (d_const.U):
467 This variable conditionally defines the HASCONST symbol, which
468 indicates to the C program that this C compiler knows about the
469 const type.
470
471d_crypt (d_crypt.U):
472 This variable conditionally defines the CRYPT symbol, which
473 indicates to the C program that the crypt() routine is available
474 to encrypt passwords and the like.
475
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476d_crypt_r (d_crypt_r.U):
477 This variable conditionally defines the HAS_CRYPT_R symbol,
478 which indicates to the C program that the crypt_r()
479 routine is available.
480
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481d_csh (d_csh.U):
482 This variable conditionally defines the CSH symbol, which
483 indicates to the C program that the C-shell exists.
484
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485d_ctermid_r (d_ctermid_r.U):
486 This variable conditionally defines the HAS_CTERMID_R symbol,
487 which indicates to the C program that the ctermid_r()
488 routine is available.
489
490d_ctime_r (d_ctime_r.U):
491 This variable conditionally defines the HAS_CTIME_R symbol,
492 which indicates to the C program that the ctime_r()
493 routine is available.
494
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495d_cuserid (d_cuserid.U):
496 This variable conditionally defines the HAS_CUSERID symbol, which
497 indicates to the C program that the cuserid() routine is available
498 to get character login names.
499
500d_dbl_dig (d_dbl_dig.U):
501 This variable conditionally defines d_dbl_dig if this system's
502 header files provide DBL_DIG, which is the number of significant
503 digits in a double precision number.
504
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505d_dbminitproto (d_dbminitproto.U):
506 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
507 which indicates to the C program that the system provides
508 a prototype for the dbminit() function. Otherwise, it is
509 up to the program to supply one.
510
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511d_difftime (d_difftime.U):
512 This variable conditionally defines the HAS_DIFFTIME symbol, which
513 indicates to the C program that the difftime() routine is available.
514
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515d_dirfd (d_dirfd.U):
516 This variable conditionally defines the HAS_DIRFD constant,
517 which indicates to the C program that dirfd() is available
518 to return the file descriptor of a directory stream.
519
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520d_dirnamlen (i_dirent.U):
521 This variable conditionally defines DIRNAMLEN, which indicates
522 to the C program that the length of directory entry names is
523 provided by a d_namelen field.
524
525d_dlerror (d_dlerror.U):
526 This variable conditionally defines the HAS_DLERROR symbol, which
527 indicates to the C program that the dlerror() routine is available.
528
529d_dlopen (d_dlopen.U):
530 This variable conditionally defines the HAS_DLOPEN symbol, which
531 indicates to the C program that the dlopen() routine is available.
532
533d_dlsymun (d_dlsymun.U):
534 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
535 indicates that we need to prepend an underscore to the symbol
536 name before calling dlsym().
537
538d_dosuid (d_dosuid.U):
539 This variable conditionally defines the symbol DOSUID, which
540 tells the C program that it should insert setuid emulation code
541 on hosts which have setuid #! scripts disabled.
542
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543d_drand48_r (d_drand48_r.U):
544 This variable conditionally defines the HAS_DRAND48_R symbol,
545 which indicates to the C program that the drand48_r()
546 routine is available.
547
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548d_drand48proto (d_drand48proto.U):
549 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
550 which indicates to the C program that the system provides
551 a prototype for the drand48() function. Otherwise, it is
552 up to the program to supply one.
553
554d_dup2 (d_dup2.U):
555 This variable conditionally defines HAS_DUP2 if dup2() is
556 available to duplicate file descriptors.
557
558d_eaccess (d_eaccess.U):
559 This variable conditionally defines the HAS_EACCESS symbol, which
560 indicates to the C program that the eaccess() routine is available.
561
562d_endgrent (d_endgrent.U):
563 This variable conditionally defines the HAS_ENDGRENT symbol, which
564 indicates to the C program that the endgrent() routine is available
565 for sequential access of the group database.
566
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567d_endgrent_r (d_endgrent_r.U):
568 This variable conditionally defines the HAS_ENDGRENT_R symbol,
569 which indicates to the C program that the endgrent_r()
570 routine is available.
571
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572d_endhent (d_endhent.U):
573 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
574 available to close whatever was being used for host queries.
575
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576d_endhostent_r (d_endhostent_r.U):
577 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
578 which indicates to the C program that the endhostent_r()
579 routine is available.
580
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581d_endnent (d_endnent.U):
582 This variable conditionally defines HAS_ENDNETENT if endnetent() is
583 available to close whatever was being used for network queries.
584
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585d_endnetent_r (d_endnetent_r.U):
586 This variable conditionally defines the HAS_ENDNETENT_R symbol,
587 which indicates to the C program that the endnetent_r()
588 routine is available.
589
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590d_endpent (d_endpent.U):
591 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
592 available to close whatever was being used for protocol queries.
593
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594d_endprotoent_r (d_endprotoent_r.U):
595 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
596 which indicates to the C program that the endprotoent_r()
597 routine is available.
598
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599d_endpwent (d_endpwent.U):
600 This variable conditionally defines the HAS_ENDPWENT symbol, which
601 indicates to the C program that the endpwent() routine is available
602 for sequential access of the passwd database.
603
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604d_endpwent_r (d_endpwent_r.U):
605 This variable conditionally defines the HAS_ENDPWENT_R symbol,
606 which indicates to the C program that the endpwent_r()
607 routine is available.
608
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609d_endsent (d_endsent.U):
610 This variable conditionally defines HAS_ENDSERVENT if endservent() is
611 available to close whatever was being used for service queries.
612
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613d_endservent_r (d_endservent_r.U):
614 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
615 which indicates to the C program that the endservent_r()
616 routine is available.
617
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618d_eofnblk (nblock_io.U):
619 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
620 when reading from a non-blocking I/O source.
621
622d_eunice (Guess.U):
623 This variable conditionally defines the symbols EUNICE and VAX, which
624 alerts the C program that it must deal with ideosyncracies of VMS.
625
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626d_fchdir (d_fchdir.U):
627 This variable conditionally defines the HAS_FCHDIR symbol, which
628 indicates to the C program that the fchdir() routine is available.
629
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630d_fchmod (d_fchmod.U):
631 This variable conditionally defines the HAS_FCHMOD symbol, which
632 indicates to the C program that the fchmod() routine is available
633 to change mode of opened files.
634
635d_fchown (d_fchown.U):
636 This variable conditionally defines the HAS_FCHOWN symbol, which
637 indicates to the C program that the fchown() routine is available
638 to change ownership of opened files.
639
640d_fcntl (d_fcntl.U):
641 This variable conditionally defines the HAS_FCNTL symbol, and indicates
642 whether the fcntl() function exists
643
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644d_fcntl_can_lock (d_fcntl_can_lock.U):
645 This variable conditionally defines the FCNTL_CAN_LOCK symbol
646 and indicates whether file locking with fcntl() works.
647
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648d_fd_macros (d_fd_set.U):
649 This variable contains the eventual value of the HAS_FD_MACROS symbol,
650 which indicates if your C compiler knows about the macros which
651 manipulate an fd_set.
652
653d_fd_set (d_fd_set.U):
654 This variable contains the eventual value of the HAS_FD_SET symbol,
655 which indicates if your C compiler knows about the fd_set typedef.
656
657d_fds_bits (d_fd_set.U):
658 This variable contains the eventual value of the HAS_FDS_BITS symbol,
659 which indicates if your fd_set typedef contains the fds_bits member.
660 If you have an fd_set typedef, but the dweebs who installed it did
661 a half-fast job and neglected to provide the macros to manipulate
662 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
663
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664d_fgetpos (d_fgetpos.U):
665 This variable conditionally defines HAS_FGETPOS if fgetpos() is
666 available to get the file position indicator.
667
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668d_finite (d_finite.U):
669 This variable conditionally defines the HAS_FINITE symbol, which
670 indicates to the C program that the finite() routine is available.
671
672d_finitel (d_finitel.U):
673 This variable conditionally defines the HAS_FINITEL symbol, which
674 indicates to the C program that the finitel() routine is available.
675
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676d_flexfnam (d_flexfnam.U):
677 This variable conditionally defines the FLEXFILENAMES symbol, which
678 indicates that the system supports filenames longer than 14 characters.
679
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680d_flock (d_flock.U):
681 This variable conditionally defines HAS_FLOCK if flock() is
682 available to do file locking.
683
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684d_flockproto (d_flockproto.U):
685 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
686 which indicates to the C program that the system provides
687 a prototype for the flock() function. Otherwise, it is
688 up to the program to supply one.
689
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690d_fork (d_fork.U):
691 This variable conditionally defines the HAS_FORK symbol, which
692 indicates to the C program that the fork() routine is available.
693
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694d_fp_class (d_fp_class.U):
695 This variable conditionally defines the HAS_FP_CLASS symbol, which
696 indicates to the C program that the fp_class() routine is available.
697
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698d_fpathconf (d_pathconf.U):
699 This variable conditionally defines the HAS_FPATHCONF symbol, which
700 indicates to the C program that the pathconf() routine is available
701 to determine file-system related limits and options associated
702 with a given open file descriptor.
703
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704d_fpclass (d_fpclass.U):
705 This variable conditionally defines the HAS_FPCLASS symbol, which
706 indicates to the C program that the fpclass() routine is available.
707
708d_fpclassify (d_fpclassify.U):
709 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
710 indicates to the C program that the fpclassify() routine is available.
711
712d_fpclassl (d_fpclassl.U):
713 This variable conditionally defines the HAS_FPCLASSL symbol, which
714 indicates to the C program that the fpclassl() routine is available.
715
c890dc6c 716d_fpos64_t (d_fpos64_t.U):
ca24dfc6 717 This symbol will be defined if the C compiler supports fpos64_t.
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719d_frexpl (d_frexpl.U):
720 This variable conditionally defines the HAS_FREXPL symbol, which
721 indicates to the C program that the frexpl() routine is available.
722
ad27e871 723d_fs_data_s (d_fs_data_s.U):
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724 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
725 which indicates that the struct fs_data is supported.
726
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727d_fseeko (d_fseeko.U):
728 This variable conditionally defines the HAS_FSEEKO symbol, which
729 indicates to the C program that the fseeko() routine is available.
730
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731d_fsetpos (d_fsetpos.U):
732 This variable conditionally defines HAS_FSETPOS if fsetpos() is
733 available to set the file position indicator.
734
0545a864 735d_fstatfs (d_fstatfs.U):
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736 This variable conditionally defines the HAS_FSTATFS symbol, which
737 indicates to the C program that the fstatfs() routine is available.
738
739d_fstatvfs (d_statvfs.U):
740 This variable conditionally defines the HAS_FSTATVFS symbol, which
741 indicates to the C program that the fstatvfs() routine is available.
742
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743d_fsync (d_fsync.U):
744 This variable conditionally defines the HAS_FSYNC symbol, which
745 indicates to the C program that the fsync() routine is available.
746
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747d_ftello (d_ftello.U):
748 This variable conditionally defines the HAS_FTELLO symbol, which
749 indicates to the C program that the ftello() routine is available.
750
751d_ftime (d_ftime.U):
752 This variable conditionally defines the HAS_FTIME symbol, which indicates
753 that the ftime() routine exists. The ftime() routine is basically
754 a sub-second accuracy clock.
755
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756d_Gconvert (d_gconvert.U):
757 This variable holds what Gconvert is defined as to convert
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758 floating point numbers into strings. By default, Configure
759 sets this macro to use the first of gconvert, gcvt, or sprintf
760 that pass sprintf-%g-like behaviour tests. If perl is using
761 long doubles, the macro uses the first of the following
762 functions that pass Configure's tests: qgcvt, sprintf (if
763 Configure knows how to make sprintf format long doubles--see
764 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
765 The gconvert_preference and gconvert_ld_preference variables
766 can be used to alter Configure's preferences, for doubles and
767 long doubles, respectively. If present, they contain a
768 space-separated list of one or more of the above function
769 names in the order they should be tried.
770 d_Gconvert may be set to override Configure with a platform-
771 specific function. If this function expects a double, a
772 different value may need to be set by the uselongdouble.cbu
773 call-back unit so that long doubles can be formatted without
774 loss of precision.
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776d_getcwd (d_getcwd.U):
777 This variable conditionally defines the HAS_GETCWD symbol, which
778 indicates to the C program that the getcwd() routine is available
779 to get the current working directory.
780
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781d_getespwnam (d_getespwnam.U):
782 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
783 available to retrieve enchanced (shadow) password entries by name.
784
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785d_getfsstat (d_getfsstat.U):
786 This variable conditionally defines the HAS_GETFSSTAT symbol, which
787 indicates to the C program that the getfsstat() routine is available.
788
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789d_getgrent (d_getgrent.U):
790 This variable conditionally defines the HAS_GETGRENT symbol, which
791 indicates to the C program that the getgrent() routine is available
792 for sequential access of the group database.
793
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794d_getgrent_r (d_getgrent_r.U):
795 This variable conditionally defines the HAS_GETGRENT_R symbol,
796 which indicates to the C program that the getgrent_r()
797 routine is available.
798
799d_getgrgid_r (d_getgrgid_r.U):
800 This variable conditionally defines the HAS_GETGRGID_R symbol,
801 which indicates to the C program that the getgrgid_r()
802 routine is available.
803
804d_getgrnam_r (d_getgrnam_r.U):
805 This variable conditionally defines the HAS_GETGRNAM_R symbol,
806 which indicates to the C program that the getgrnam_r()
807 routine is available.
808
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809d_getgrps (d_getgrps.U):
810 This variable conditionally defines the HAS_GETGROUPS symbol, which
811 indicates to the C program that the getgroups() routine is available
812 to get the list of process groups.
813
814d_gethbyaddr (d_gethbyad.U):
815 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
816 indicates to the C program that the gethostbyaddr() routine is available
817 to look up hosts by their IP addresses.
818
819d_gethbyname (d_gethbynm.U):
820 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
821 indicates to the C program that the gethostbyname() routine is available
822 to look up host names in some data base or other.
823
824d_gethent (d_gethent.U):
825 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
826 available to look up host names in some data base or another.
827
828d_gethname (d_gethname.U):
829 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
830 indicates to the C program that the gethostname() routine may be
831 used to derive the host name.
832
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833d_gethostbyaddr_r (d_gethostbyaddr_r.U):
834 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
835 which indicates to the C program that the gethostbyaddr_r()
836 routine is available.
837
838d_gethostbyname_r (d_gethostbyname_r.U):
839 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
840 which indicates to the C program that the gethostbyname_r()
841 routine is available.
842
843d_gethostent_r (d_gethostent_r.U):
844 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
845 which indicates to the C program that the gethostent_r()
846 routine is available.
847
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848d_gethostprotos (d_gethostprotos.U):
849 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
850 which indicates to the C program that <netdb.h> supplies
851 prototypes for the various gethost*() functions.
852 See also netdbtype.U for probing for various netdb types.
853
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854d_getitimer (d_getitimer.U):
855 This variable conditionally defines the HAS_GETITIMER symbol, which
856 indicates to the C program that the getitimer() routine is available.
857
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858d_getlogin (d_getlogin.U):
859 This variable conditionally defines the HAS_GETLOGIN symbol, which
860 indicates to the C program that the getlogin() routine is available
861 to get the login name.
862
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863d_getlogin_r (d_getlogin_r.U):
864 This variable conditionally defines the HAS_GETLOGIN_R symbol,
865 which indicates to the C program that the getlogin_r()
866 routine is available.
867
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868d_getmnt (d_getmnt.U):
869 This variable conditionally defines the HAS_GETMNT symbol, which
870 indicates to the C program that the getmnt() routine is available
871 to retrieve one or more mount info blocks by filename.
872
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873d_getmntent (d_getmntent.U):
874 This variable conditionally defines the HAS_GETMNTENT symbol, which
875 indicates to the C program that the getmntent() routine is available
0617aed7 876 to iterate through mounted files to get their mount info.
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877
878d_getnbyaddr (d_getnbyad.U):
879 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
880 indicates to the C program that the getnetbyaddr() routine is available
881 to look up networks by their IP addresses.
882
883d_getnbyname (d_getnbynm.U):
884 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
885 indicates to the C program that the getnetbyname() routine is available
886 to look up networks by their names.
887
888d_getnent (d_getnent.U):
889 This variable conditionally defines HAS_GETNETENT if getnetent() is
890 available to look up network names in some data base or another.
891
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892d_getnetbyaddr_r (d_getnetbyaddr_r.U):
893 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
894 which indicates to the C program that the getnetbyaddr_r()
895 routine is available.
896
897d_getnetbyname_r (d_getnetbyname_r.U):
898 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
899 which indicates to the C program that the getnetbyname_r()
900 routine is available.
901
902d_getnetent_r (d_getnetent_r.U):
903 This variable conditionally defines the HAS_GETNETENT_R symbol,
904 which indicates to the C program that the getnetent_r()
905 routine is available.
906
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907d_getnetprotos (d_getnetprotos.U):
908 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
909 which indicates to the C program that <netdb.h> supplies
910 prototypes for the various getnet*() functions.
911 See also netdbtype.U for probing for various netdb types.
912
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913d_getpagsz (d_getpagsz.U):
914 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
915 is available to get the system page size.
916
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917d_getpbyname (d_getprotby.U):
918 This variable conditionally defines the HAS_GETPROTOBYNAME
919 symbol, which indicates to the C program that the
920 getprotobyname() routine is available to look up protocols
921 by their name.
922
923d_getpbynumber (d_getprotby.U):
924 This variable conditionally defines the HAS_GETPROTOBYNUMBER
925 symbol, which indicates to the C program that the
926 getprotobynumber() routine is available to look up protocols
927 by their number.
928
929d_getpent (d_getpent.U):
930 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
931 available to look up protocols in some data base or another.
932
933d_getpgid (d_getpgid.U):
934 This variable conditionally defines the HAS_GETPGID symbol, which
935 indicates to the C program that the getpgid(pid) function
936 is available to get the process group id.
937
938d_getpgrp2 (d_getpgrp2.U):
939 This variable conditionally defines the HAS_GETPGRP2 symbol, which
940 indicates to the C program that the getpgrp2() (as in DG/UX) routine
941 is available to get the current process group.
942
943d_getpgrp (d_getpgrp.U):
944 This variable conditionally defines HAS_GETPGRP if getpgrp() is
945 available to get the current process group.
946
947d_getppid (d_getppid.U):
948 This variable conditionally defines the HAS_GETPPID symbol, which
949 indicates to the C program that the getppid() routine is available
950 to get the parent process ID.
951
952d_getprior (d_getprior.U):
953 This variable conditionally defines HAS_GETPRIORITY if getpriority()
954 is available to get a process's priority.
955
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956d_getprotobyname_r (d_getprotobyname_r.U):
957 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
958 which indicates to the C program that the getprotobyname_r()
959 routine is available.
960
961d_getprotobynumber_r (d_getprotobynumber_r.U):
962 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
963 which indicates to the C program that the getprotobynumber_r()
964 routine is available.
965
966d_getprotoent_r (d_getprotoent_r.U):
967 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
968 which indicates to the C program that the getprotoent_r()
969 routine is available.
970
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971d_getprotoprotos (d_getprotoprotos.U):
972 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
973 which indicates to the C program that <netdb.h> supplies
974 prototypes for the various getproto*() functions.
975 See also netdbtype.U for probing for various netdb types.
976
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977d_getprpwnam (d_getprpwnam.U):
978 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
979 available to retrieve protected (shadow) password entries by name.
980
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981d_getpwent (d_getpwent.U):
982 This variable conditionally defines the HAS_GETPWENT symbol, which
983 indicates to the C program that the getpwent() routine is available
984 for sequential access of the passwd database.
985
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986d_getpwent_r (d_getpwent_r.U):
987 This variable conditionally defines the HAS_GETPWENT_R symbol,
988 which indicates to the C program that the getpwent_r()
989 routine is available.
990
991d_getpwnam_r (d_getpwnam_r.U):
992 This variable conditionally defines the HAS_GETPWNAM_R symbol,
993 which indicates to the C program that the getpwnam_r()
994 routine is available.
995
996d_getpwuid_r (d_getpwuid_r.U):
997 This variable conditionally defines the HAS_GETPWUID_R symbol,
998 which indicates to the C program that the getpwuid_r()
999 routine is available.
1000
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1001d_getsbyname (d_getsrvby.U):
1002 This variable conditionally defines the HAS_GETSERVBYNAME
1003 symbol, which indicates to the C program that the
1004 getservbyname() routine is available to look up services
1005 by their name.
1006
1007d_getsbyport (d_getsrvby.U):
1008 This variable conditionally defines the HAS_GETSERVBYPORT
1009 symbol, which indicates to the C program that the
1010 getservbyport() routine is available to look up services
1011 by their port.
1012
1013d_getsent (d_getsent.U):
1014 This variable conditionally defines HAS_GETSERVENT if getservent() is
1015 available to look up network services in some data base or another.
1016
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1017d_getservbyname_r (d_getservbyname_r.U):
1018 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1019 which indicates to the C program that the getservbyname_r()
1020 routine is available.
1021
1022d_getservbyport_r (d_getservbyport_r.U):
1023 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1024 which indicates to the C program that the getservbyport_r()
1025 routine is available.
1026
1027d_getservent_r (d_getservent_r.U):
1028 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1029 which indicates to the C program that the getservent_r()
1030 routine is available.
1031
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1032d_getservprotos (d_getservprotos.U):
1033 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1034 which indicates to the C program that <netdb.h> supplies
1035 prototypes for the various getserv*() functions.
1036 See also netdbtype.U for probing for various netdb types.
1037
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1038d_getspnam (d_getspnam.U):
1039 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1040 available to retrieve SysV shadow password entries by name.
1041
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1042d_getspnam_r (d_getspnam_r.U):
1043 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1044 which indicates to the C program that the getspnam_r()
1045 routine is available.
1046
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1047d_gettimeod (d_ftime.U):
1048 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1049 indicates that the gettimeofday() system call exists (to obtain a
1050 sub-second accuracy clock). You should probably include <sys/resource.h>.
1051
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1052d_gmtime_r (d_gmtime_r.U):
1053 This variable conditionally defines the HAS_GMTIME_R symbol,
1054 which indicates to the C program that the gmtime_r()
1055 routine is available.
1056
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1057d_gnulibc (d_gnulibc.U):
1058 Defined if we're dealing with the GNU C Library.
1059
1060d_grpasswd (i_grp.U):
1061 This variable conditionally defines GRPASSWD, which indicates
1062 that struct group in <grp.h> contains gr_passwd.
1063
1064d_hasmntopt (d_hasmntopt.U):
1065 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1066 indicates to the C program that the hasmntopt() routine is available
1067 to query the mount options of file systems.
1068
1069d_htonl (d_htonl.U):
1070 This variable conditionally defines HAS_HTONL if htonl() and its
1071 friends are available to do network order byte swapping.
1072
1073d_index (d_strchr.U):
1074 This variable conditionally defines HAS_INDEX if index() and
1075 rindex() are available for string searching.
1076
1077d_inetaton (d_inetaton.U):
1078 This variable conditionally defines the HAS_INET_ATON symbol, which
1079 indicates to the C program that the inet_aton() function is available
1080 to parse IP address "dotted-quad" strings.
1081
13b3f787 1082d_int64_t (d_int64_t.U):
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1083 This symbol will be defined if the C compiler supports int64_t.
1084
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1085d_isascii (d_isascii.U):
1086 This variable conditionally defines the HAS_ISASCII constant,
1087 which indicates to the C program that isascii() is available.
1088
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1089d_isfinite (d_isfinite.U):
1090 This variable conditionally defines the HAS_ISFINITE symbol, which
1091 indicates to the C program that the isfinite() routine is available.
1092
1093d_isinf (d_isinf.U):
1094 This variable conditionally defines the HAS_ISINF symbol, which
1095 indicates to the C program that the isinf() routine is available.
1096
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1097d_isnan (d_isnan.U):
1098 This variable conditionally defines the HAS_ISNAN symbol, which
1099 indicates to the C program that the isnan() routine is available.
1100
1101d_isnanl (d_isnanl.U):
1102 This variable conditionally defines the HAS_ISNANL symbol, which
1103 indicates to the C program that the isnanl() routine is available.
1104
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1105d_killpg (d_killpg.U):
1106 This variable conditionally defines the HAS_KILLPG symbol, which
1107 indicates to the C program that the killpg() routine is available
1108 to kill process groups.
1109
1110d_lchown (d_lchown.U):
1111 This variable conditionally defines the HAS_LCHOWN symbol, which
1112 indicates to the C program that the lchown() routine is available
1113 to operate on a symbolic link (instead of following the link).
1114
ca24dfc6
LV
1115d_ldbl_dig (d_ldbl_dig.U):
1116 This variable conditionally defines d_ldbl_dig if this system's
1117 header files provide LDBL_DIG, which is the number of significant
1118 digits in a long double precision number.
1119
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1120d_link (d_link.U):
1121 This variable conditionally defines HAS_LINK if link() is
1122 available to create hard links.
1123
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JH
1124d_localtime_r (d_localtime_r.U):
1125 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1126 which indicates to the C program that the localtime_r()
1127 routine is available.
1128
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1129d_locconv (d_locconv.U):
1130 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1131 available for numeric and monetary formatting conventions.
1132
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JH
1133d_lockf (d_lockf.U):
1134 This variable conditionally defines HAS_LOCKF if lockf() is
1135 available to do file locking.
1136
1137d_longdbl (d_longdbl.U):
1138 This variable conditionally defines HAS_LONG_DOUBLE if
1139 the long double type is supported.
1140
1141d_longlong (d_longlong.U):
1142 This variable conditionally defines HAS_LONG_LONG if
1143 the long long type is supported.
1144
c890dc6c
JH
1145d_lseekproto (d_lseekproto.U):
1146 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1147 which indicates to the C program that the system provides
1148 a prototype for the lseek() function. Otherwise, it is
1149 up to the program to supply one.
1150
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1151d_lstat (d_lstat.U):
1152 This variable conditionally defines HAS_LSTAT if lstat() is
1153 available to do file stats on symbolic links.
1154
792d8dab
JH
1155d_madvise (d_madvise.U):
1156 This variable conditionally defines HAS_MADVISE if madvise() is
1157 available to map a file into memory.
1158
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1159d_mblen (d_mblen.U):
1160 This variable conditionally defines the HAS_MBLEN symbol, which
1161 indicates to the C program that the mblen() routine is available
1162 to find the number of bytes in a multibye character.
1163
1164d_mbstowcs (d_mbstowcs.U):
1165 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1166 indicates to the C program that the mbstowcs() routine is available
1167 to convert a multibyte string into a wide character string.
1168
1169d_mbtowc (d_mbtowc.U):
1170 This variable conditionally defines the HAS_MBTOWC symbol, which
1171 indicates to the C program that the mbtowc() routine is available
1172 to convert multibyte to a wide character.
1173
1174d_memchr (d_memchr.U):
1175 This variable conditionally defines the HAS_MEMCHR symbol, which
1176 indicates to the C program that the memchr() routine is available
1177 to locate characters within a C string.
1178
1179d_memcmp (d_memcmp.U):
1180 This variable conditionally defines the HAS_MEMCMP symbol, which
1181 indicates to the C program that the memcmp() routine is available
1182 to compare blocks of memory.
1183
1184d_memcpy (d_memcpy.U):
1185 This variable conditionally defines the HAS_MEMCPY symbol, which
1186 indicates to the C program that the memcpy() routine is available
1187 to copy blocks of memory.
1188
1189d_memmove (d_memmove.U):
1190 This variable conditionally defines the HAS_MEMMOVE symbol, which
1191 indicates to the C program that the memmove() routine is available
1192 to copy potentatially overlapping blocks of memory.
1193
1194d_memset (d_memset.U):
1195 This variable conditionally defines the HAS_MEMSET symbol, which
1196 indicates to the C program that the memset() routine is available
1197 to set blocks of memory.
1198
1199d_mkdir (d_mkdir.U):
1200 This variable conditionally defines the HAS_MKDIR symbol, which
1201 indicates to the C program that the mkdir() routine is available
209e5c0a 1202 to create directories..
781b178c 1203
fe749a9f
JH
1204d_mkdtemp (d_mkdtemp.U):
1205 This variable conditionally defines the HAS_MKDTEMP symbol, which
1206 indicates to the C program that the mkdtemp() routine is available
1207 to exclusively create a uniquely named temporary directory.
1208
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1209d_mkfifo (d_mkfifo.U):
1210 This variable conditionally defines the HAS_MKFIFO symbol, which
1211 indicates to the C program that the mkfifo() routine is available.
1212
fe749a9f
JH
1213d_mkstemp (d_mkstemp.U):
1214 This variable conditionally defines the HAS_MKSTEMP symbol, which
1215 indicates to the C program that the mkstemp() routine is available
1216 to exclusively create and open a uniquely named temporary file.
1217
1218d_mkstemps (d_mkstemps.U):
1219 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1220 indicates to the C program that the mkstemps() routine is available
1221 to exclusively create and open a uniquely named (with a suffix)
1222 temporary file.
1223
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1224d_mktime (d_mktime.U):
1225 This variable conditionally defines the HAS_MKTIME symbol, which
1226 indicates to the C program that the mktime() routine is available.
1227
fe749a9f
JH
1228d_mmap (d_mmap.U):
1229 This variable conditionally defines HAS_MMAP if mmap() is
1230 available to map a file into memory.
1231
a3540c92
JH
1232d_modfl (d_modfl.U):
1233 This variable conditionally defines the HAS_MODFL symbol, which
1234 indicates to the C program that the modfl() routine is available.
1235
e67aeab1
JH
1236d_modfl_pow32_bug (d_modfl.U):
1237 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1238 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1239 For example from 4294967303.150000 one would get 4294967302.000000
1240 and 1.150000. The bug has been seen in certain versions of glibc,
1241 release 2.2.2 is known to be okay.
1242
fe749a9f
JH
1243d_mprotect (d_mprotect.U):
1244 This variable conditionally defines HAS_MPROTECT if mprotect() is
1245 available to modify the access protection of a memory mapped file.
1246
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1247d_msg (d_msg.U):
1248 This variable conditionally defines the HAS_MSG symbol, which
1249 indicates that the entire msg*(2) library is present.
1250
1251d_msg_ctrunc (d_socket.U):
1252 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1253 which indicates that the MSG_CTRUNC is available. #ifdef is
1254 not enough because it may be an enum, glibc has been known to do this.
1255
1256d_msg_dontroute (d_socket.U):
1257 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1258 which indicates that the MSG_DONTROUTE is available. #ifdef is
1259 not enough because it may be an enum, glibc has been known to do this.
1260
1261d_msg_oob (d_socket.U):
1262 This variable conditionally defines the HAS_MSG_OOB symbol,
1263 which indicates that the MSG_OOB is available. #ifdef is
1264 not enough because it may be an enum, glibc has been known to do this.
1265
1266d_msg_peek (d_socket.U):
1267 This variable conditionally defines the HAS_MSG_PEEK symbol,
1268 which indicates that the MSG_PEEK is available. #ifdef is
1269 not enough because it may be an enum, glibc has been known to do this.
1270
1271d_msg_proxy (d_socket.U):
1272 This variable conditionally defines the HAS_MSG_PROXY symbol,
1273 which indicates that the MSG_PROXY is available. #ifdef is
1274 not enough because it may be an enum, glibc has been known to do this.
1275
1276d_msgctl (d_msgctl.U):
1277 This variable conditionally defines the HAS_MSGCTL symbol, which
1278 indicates to the C program that the msgctl() routine is available.
1279
1280d_msgget (d_msgget.U):
1281 This variable conditionally defines the HAS_MSGGET symbol, which
1282 indicates to the C program that the msgget() routine is available.
1283
4e0554ec
JH
1284d_msghdr_s (d_msghdr_s.U):
1285 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1286 which indicates that the struct msghdr is supported.
1287
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JH
1288d_msgrcv (d_msgrcv.U):
1289 This variable conditionally defines the HAS_MSGRCV symbol, which
1290 indicates to the C program that the msgrcv() routine is available.
1291
1292d_msgsnd (d_msgsnd.U):
1293 This variable conditionally defines the HAS_MSGSND symbol, which
1294 indicates to the C program that the msgsnd() routine is available.
1295
fe749a9f
JH
1296d_msync (d_msync.U):
1297 This variable conditionally defines HAS_MSYNC if msync() is
1298 available to synchronize a mapped file.
1299
1300d_munmap (d_munmap.U):
1301 This variable conditionally defines HAS_MUNMAP if munmap() is
1302 available to unmap a region mapped by mmap().
1303
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1304d_mymalloc (mallocsrc.U):
1305 This variable conditionally defines MYMALLOC in case other parts
1306 of the source want to take special action if MYMALLOC is used.
1307 This may include different sorts of profiling or error detection.
1308
781b178c
JH
1309d_nice (d_nice.U):
1310 This variable conditionally defines the HAS_NICE symbol, which
1311 indicates to the C program that the nice() routine is available.
1312
2765b840
JH
1313d_nl_langinfo (d_nl_langinfo.U):
1314 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1315 indicates to the C program that the nl_langinfo() routine is available.
1316
78691af5 1317d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1318 This variable indicates whether a variable of type nvtype
1319 can preserve all the bits a variable of type uvtype.
1320
c890dc6c 1321d_off64_t (d_off64_t.U):
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JH
1322 This symbol will be defined if the C compiler supports off64_t.
1323
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JH
1324d_old_pthread_create_joinable (d_pthrattrj.U):
1325 This variable conditionally defines pthread_create_joinable.
1326 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1327
1328d_oldpthreads (usethreads.U):
1329 This variable conditionally defines the OLD_PTHREADS_API symbol,
1330 and indicates that Perl should be built to use the old
8c09e4ca 1331 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1332 usethreads is set.
1333
1334d_oldsock (d_socket.U):
1335 This variable conditionally defines the OLDSOCKET symbol, which
1336 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1337
1338d_open3 (d_open3.U):
1339 This variable conditionally defines the HAS_OPEN3 manifest constant,
1340 which indicates to the C program that the 3 argument version of
1341 the open(2) function is available.
1342
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JH
1343d_pathconf (d_pathconf.U):
1344 This variable conditionally defines the HAS_PATHCONF symbol, which
1345 indicates to the C program that the pathconf() routine is available
1346 to determine file-system related limits and options associated
1347 with a given filename.
1348
1349d_pause (d_pause.U):
1350 This variable conditionally defines the HAS_PAUSE symbol, which
1351 indicates to the C program that the pause() routine is available
1352 to suspend a process until a signal is received.
1353
3b777bb4
GS
1354d_perl_otherlibdirs (otherlibdirs.U):
1355 This variable conditionally defines PERL_OTHERLIBDIRS, which
1356 contains a colon-separated set of paths for the perl binary to
1357 include in @INC. See also otherlibdirs.
1358
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JH
1359d_phostname (d_gethname.U):
1360 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1361 contains the shell command which, when fed to popen(), may be
1362 used to derive the host name.
1363
1364d_pipe (d_pipe.U):
1365 This variable conditionally defines the HAS_PIPE symbol, which
1366 indicates to the C program that the pipe() routine is available
1367 to create an inter-process channel.
1368
1369d_poll (d_poll.U):
1370 This variable conditionally defines the HAS_POLL symbol, which
1371 indicates to the C program that the poll() routine is available
1372 to poll active file descriptors.
1373
1374d_portable (d_portable.U):
1375 This variable conditionally defines the PORTABLE symbol, which
1376 indicates to the C program that it should not assume that it is
1377 running on the machine it was compiled on.
1378
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JH
1379d_PRId64 (quadfio.U):
1380 This variable conditionally defines the PERL_PRId64 symbol, which
1381 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1382
1383d_PRIeldbl (longdblfio.U):
6b356c8e 1384 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1385 indiciates that stdio has a symbol to print long doubles.
1386
6b356c8e
JH
1387d_PRIEUldbl (longdblfio.U):
1388 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1389 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1390 The 'U' in the name is to separate this from d_PRIeldbl so that even
1391 case-blind systems can see the difference.
ff935051
JH
1392
1393d_PRIfldbl (longdblfio.U):
6b356c8e 1394 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1395 indiciates that stdio has a symbol to print long doubles.
1396
6b356c8e
JH
1397d_PRIFUldbl (longdblfio.U):
1398 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1399 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1400 The 'U' in the name is to separate this from d_PRIfldbl so that even
1401 case-blind systems can see the difference.
ff935051
JH
1402
1403d_PRIgldbl (longdblfio.U):
6b356c8e 1404 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1405 indiciates that stdio has a symbol to print long doubles.
1406
6b356c8e
JH
1407d_PRIGUldbl (longdblfio.U):
1408 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1409 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1410 The 'U' in the name is to separate this from d_PRIgldbl so that even
1411 case-blind systems can see the difference.
ff935051
JH
1412
1413d_PRIi64 (quadfio.U):
1414 This variable conditionally defines the PERL_PRIi64 symbol, which
1415 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1416
1417d_PRIo64 (quadfio.U):
1418 This variable conditionally defines the PERL_PRIo64 symbol, which
1419 indiciates that stdio has a symbol to print 64-bit octal numbers.
1420
1421d_PRIu64 (quadfio.U):
1422 This variable conditionally defines the PERL_PRIu64 symbol, which
1423 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1424 numbers.
1425
1426d_PRIx64 (quadfio.U):
1427 This variable conditionally defines the PERL_PRIx64 symbol, which
1428 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1429
6b356c8e
JH
1430d_PRIXU64 (quadfio.U):
1431 This variable conditionally defines the PERL_PRIXU64 symbol, which
ff935051 1432 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
6b356c8e
JH
1433 The 'U' in the name is to separate this from d_PRIx64 so that even
1434 case-blind systems can see the difference.
ff935051 1435
428dc699
JH
1436d_procselfexe (d_procselfexe.U):
1437 Defined if $procselfexe is symlink to the absolute
1438 pathname of the executing program.
1439
d6483fcc
JH
1440d_pthread_atfork (d_pthread_atfork.U):
1441 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1442 which indicates to the C program that the pthread_atfork()
1443 routine is available.
1444
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1445d_pthread_yield (d_pthread_y.U):
1446 This variable conditionally defines the HAS_PTHREAD_YIELD
1447 symbol if the pthread_yield routine is available to yield
1448 the execution of the current thread.
1449
1450d_pwage (i_pwd.U):
1451 This variable conditionally defines PWAGE, which indicates
1452 that struct passwd contains pw_age.
1453
1454d_pwchange (i_pwd.U):
1455 This variable conditionally defines PWCHANGE, which indicates
1456 that struct passwd contains pw_change.
1457
1458d_pwclass (i_pwd.U):
1459 This variable conditionally defines PWCLASS, which indicates
1460 that struct passwd contains pw_class.
1461
1462d_pwcomment (i_pwd.U):
1463 This variable conditionally defines PWCOMMENT, which indicates
1464 that struct passwd contains pw_comment.
1465
1466d_pwexpire (i_pwd.U):
1467 This variable conditionally defines PWEXPIRE, which indicates
1468 that struct passwd contains pw_expire.
1469
1470d_pwgecos (i_pwd.U):
1471 This variable conditionally defines PWGECOS, which indicates
1472 that struct passwd contains pw_gecos.
1473
1474d_pwpasswd (i_pwd.U):
1475 This variable conditionally defines PWPASSWD, which indicates
1476 that struct passwd contains pw_passwd.
1477
1478d_pwquota (i_pwd.U):
1479 This variable conditionally defines PWQUOTA, which indicates
1480 that struct passwd contains pw_quota.
1481
792d8dab
JH
1482d_qgcvt (d_qgcvt.U):
1483 This variable conditionally defines the HAS_QGCVT symbol, which
1484 indicates to the C program that the qgcvt() routine is available.
1485
de1c2614
JH
1486d_quad (quadtype.U):
1487 This variable, if defined, tells that there's a 64-bit integer type,
1488 quadtype.
1489
10bc17b6
JH
1490d_random_r (d_random_r.U):
1491 This variable conditionally defines the HAS_RANDOM_R symbol,
1492 which indicates to the C program that the random_r()
1493 routine is available.
1494
1495d_readdir64_r (d_readdir64_r.U):
1496 This variable conditionally defines the HAS_READDIR64_R symbol,
1497 which indicates to the C program that the readdir64_r()
1498 routine is available.
1499
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1500d_readdir (d_readdir.U):
1501 This variable conditionally defines HAS_READDIR if readdir() is
1502 available to read directory entries.
1503
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1504d_readdir_r (d_readdir_r.U):
1505 This variable conditionally defines the HAS_READDIR_R symbol,
1506 which indicates to the C program that the readdir_r()
1507 routine is available.
1508
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1509d_readlink (d_readlink.U):
1510 This variable conditionally defines the HAS_READLINK symbol, which
1511 indicates to the C program that the readlink() routine is available
1512 to read the value of a symbolic link.
1513
4e0554ec
JH
1514d_readv (d_readv.U):
1515 This variable conditionally defines the HAS_READV symbol, which
1516 indicates to the C program that the readv() routine is available.
1517
1518d_recvmsg (d_recvmsg.U):
1519 This variable conditionally defines the HAS_RECVMSG symbol, which
1520 indicates to the C program that the recvmsg() routine is available.
1521
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1522d_rename (d_rename.U):
1523 This variable conditionally defines the HAS_RENAME symbol, which
1524 indicates to the C program that the rename() routine is available
1525 to rename files.
1526
1527d_rewinddir (d_readdir.U):
1528 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1529 available.
1530
1531d_rmdir (d_rmdir.U):
1532 This variable conditionally defines HAS_RMDIR if rmdir() is
1533 available to remove directories.
1534
1535d_safebcpy (d_safebcpy.U):
1536 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1537 the bcopy() routine can do overlapping copies. Normally, you
1538 should probably use memmove().
781b178c
JH
1539
1540d_safemcpy (d_safemcpy.U):
1541 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1542 the memcpy() routine can do overlapping copies.
b6cc3bc4 1543 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1544
1545d_sanemcmp (d_sanemcmp.U):
1546 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1547 the memcpy() routine is available and can be used to compare relative
1548 magnitudes of chars with their high bits set.
1549
ef9f17be
JH
1550d_sbrkproto (d_sbrkproto.U):
1551 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1552 which indicates to the C program that the system provides
1553 a prototype for the sbrk() function. Otherwise, it is
1554 up to the program to supply one.
1555
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JH
1556d_sched_yield (d_pthread_y.U):
1557 This variable conditionally defines the HAS_SCHED_YIELD
1558 symbol if the sched_yield routine is available to yield
1559 the execution of the current thread.
1560
1561d_scm_rights (d_socket.U):
1562 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1563 which indicates that the SCM_RIGHTS is available. #ifdef is
1564 not enough because it may be an enum, glibc has been known to do this.
1565
6b356c8e
JH
1566d_SCNfldbl (longdblfio.U):
1567 This variable conditionally defines the PERL_PRIfldbl symbol, which
1568 indiciates that stdio has a symbol to scan long doubles.
1569
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1570d_seekdir (d_readdir.U):
1571 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1572 available.
1573
1574d_select (d_select.U):
1575 This variable conditionally defines HAS_SELECT if select() is
1576 available to select active file descriptors. A <sys/time.h>
1577 inclusion may be necessary for the timeout field.
1578
1579d_sem (d_sem.U):
1580 This variable conditionally defines the HAS_SEM symbol, which
1581 indicates that the entire sem*(2) library is present.
1582
1583d_semctl (d_semctl.U):
1584 This variable conditionally defines the HAS_SEMCTL symbol, which
1585 indicates to the C program that the semctl() routine is available.
1586
1587d_semctl_semid_ds (d_union_semun.U):
1588 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1589 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1590
1591d_semctl_semun (d_union_semun.U):
1592 This variable conditionally defines USE_SEMCTL_SEMUN, which
1593 indicates that union semun is to be used for semctl IPC_STAT.
1594
1595d_semget (d_semget.U):
1596 This variable conditionally defines the HAS_SEMGET symbol, which
1597 indicates to the C program that the semget() routine is available.
1598
1599d_semop (d_semop.U):
1600 This variable conditionally defines the HAS_SEMOP symbol, which
1601 indicates to the C program that the semop() routine is available.
1602
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JH
1603d_sendmsg (d_sendmsg.U):
1604 This variable conditionally defines the HAS_SENDMSG symbol, which
1605 indicates to the C program that the sendmsg() routine is available.
1606
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1607d_setegid (d_setegid.U):
1608 This variable conditionally defines the HAS_SETEGID symbol, which
1609 indicates to the C program that the setegid() routine is available
1610 to change the effective gid of the current program.
1611
1612d_seteuid (d_seteuid.U):
1613 This variable conditionally defines the HAS_SETEUID symbol, which
1614 indicates to the C program that the seteuid() routine is available
1615 to change the effective uid of the current program.
1616
1617d_setgrent (d_setgrent.U):
1618 This variable conditionally defines the HAS_SETGRENT symbol, which
1619 indicates to the C program that the setgrent() routine is available
1620 for initializing sequential access to the group database.
1621
10bc17b6
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1622d_setgrent_r (d_setgrent_r.U):
1623 This variable conditionally defines the HAS_SETGRENT_R symbol,
1624 which indicates to the C program that the setgrent_r()
1625 routine is available.
1626
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1627d_setgrps (d_setgrps.U):
1628 This variable conditionally defines the HAS_SETGROUPS symbol, which
1629 indicates to the C program that the setgroups() routine is available
1630 to set the list of process groups.
1631
1632d_sethent (d_sethent.U):
1633 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1634 available.
1635
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1636d_sethostent_r (d_sethostent_r.U):
1637 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1638 which indicates to the C program that the sethostent_r()
1639 routine is available.
1640
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1641d_setitimer (d_setitimer.U):
1642 This variable conditionally defines the HAS_SETITIMER symbol, which
1643 indicates to the C program that the setitimer() routine is available.
1644
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1645d_setlinebuf (d_setlnbuf.U):
1646 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1647 indicates to the C program that the setlinebuf() routine is available
1648 to change stderr or stdout from block-buffered or unbuffered to a
1649 line-buffered mode.
1650
1651d_setlocale (d_setlocale.U):
1652 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1653 available to handle locale-specific ctype implementations.
1654
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1655d_setlocale_r (d_setlocale_r.U):
1656 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1657 which indicates to the C program that the setlocale_r()
1658 routine is available.
1659
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1660d_setnent (d_setnent.U):
1661 This variable conditionally defines HAS_SETNETENT if setnetent() is
1662 available.
1663
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1664d_setnetent_r (d_setnetent_r.U):
1665 This variable conditionally defines the HAS_SETNETENT_R symbol,
1666 which indicates to the C program that the setnetent_r()
1667 routine is available.
1668
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1669d_setpent (d_setpent.U):
1670 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1671 available.
1672
1673d_setpgid (d_setpgid.U):
1674 This variable conditionally defines the HAS_SETPGID symbol if the
1675 setpgid(pid, gpid) function is available to set process group ID.
1676
1677d_setpgrp2 (d_setpgrp2.U):
1678 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1679 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1680 is available to set the current process group.
1681
1682d_setpgrp (d_setpgrp.U):
1683 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1684 available to set the current process group.
1685
1686d_setprior (d_setprior.U):
1687 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1688 is available to set a process's priority.
1689
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1690d_setproctitle (d_setproctitle.U):
1691 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1692 which indicates to the C program that the setproctitle() routine
1693 is available.
1694
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1695d_setprotoent_r (d_setprotoent_r.U):
1696 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1697 which indicates to the C program that the setprotoent_r()
1698 routine is available.
1699
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1700d_setpwent (d_setpwent.U):
1701 This variable conditionally defines the HAS_SETPWENT symbol, which
1702 indicates to the C program that the setpwent() routine is available
1703 for initializing sequential access to the passwd database.
1704
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1705d_setpwent_r (d_setpwent_r.U):
1706 This variable conditionally defines the HAS_SETPWENT_R symbol,
1707 which indicates to the C program that the setpwent_r()
1708 routine is available.
1709
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1710d_setregid (d_setregid.U):
1711 This variable conditionally defines HAS_SETREGID if setregid() is
1712 available to change the real and effective gid of the current
1713 process.
1714
1715d_setresgid (d_setregid.U):
1716 This variable conditionally defines HAS_SETRESGID if setresgid() is
1717 available to change the real, effective and saved gid of the current
1718 process.
1719
1720d_setresuid (d_setreuid.U):
1721 This variable conditionally defines HAS_SETREUID if setresuid() is
1722 available to change the real, effective and saved uid of the current
1723 process.
1724
1725d_setreuid (d_setreuid.U):
1726 This variable conditionally defines HAS_SETREUID if setreuid() is
1727 available to change the real and effective uid of the current
1728 process.
1729
1730d_setrgid (d_setrgid.U):
1731 This variable conditionally defines the HAS_SETRGID symbol, which
1732 indicates to the C program that the setrgid() routine is available
1733 to change the real gid of the current program.
1734
1735d_setruid (d_setruid.U):
1736 This variable conditionally defines the HAS_SETRUID symbol, which
1737 indicates to the C program that the setruid() routine is available
1738 to change the real uid of the current program.
1739
1740d_setsent (d_setsent.U):
1741 This variable conditionally defines HAS_SETSERVENT if setservent() is
1742 available.
1743
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1744d_setservent_r (d_setservent_r.U):
1745 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1746 which indicates to the C program that the setservent_r()
1747 routine is available.
1748
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1749d_setsid (d_setsid.U):
1750 This variable conditionally defines HAS_SETSID if setsid() is
1751 available to set the process group ID.
1752
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1753d_setvbuf (d_setvbuf.U):
1754 This variable conditionally defines the HAS_SETVBUF symbol, which
1755 indicates to the C program that the setvbuf() routine is available
1756 to change buffering on an open stdio stream.
1757
1758d_sfio (d_sfio.U):
1759 This variable conditionally defines the USE_SFIO symbol,
1760 and indicates whether sfio is available (and should be used).
1761
1762d_shm (d_shm.U):
1763 This variable conditionally defines the HAS_SHM symbol, which
1764 indicates that the entire shm*(2) library is present.
1765
1766d_shmat (d_shmat.U):
1767 This variable conditionally defines the HAS_SHMAT symbol, which
1768 indicates to the C program that the shmat() routine is available.
1769
1770d_shmatprototype (d_shmat.U):
1771 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1772 symbol, which indicates that sys/shm.h has a prototype for
1773 shmat.
1774
1775d_shmctl (d_shmctl.U):
1776 This variable conditionally defines the HAS_SHMCTL symbol, which
1777 indicates to the C program that the shmctl() routine is available.
1778
1779d_shmdt (d_shmdt.U):
1780 This variable conditionally defines the HAS_SHMDT symbol, which
1781 indicates to the C program that the shmdt() routine is available.
1782
1783d_shmget (d_shmget.U):
1784 This variable conditionally defines the HAS_SHMGET symbol, which
1785 indicates to the C program that the shmget() routine is available.
1786
1787d_sigaction (d_sigaction.U):
1788 This variable conditionally defines the HAS_SIGACTION symbol, which
1789 indicates that the Vr4 sigaction() routine is available.
1790
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1791d_sigprocmask (d_sigprocmask.U):
1792 This variable conditionally defines HAS_SIGPROCMASK
1793 if sigprocmask() is available to examine or change the signal mask
1794 of the calling process.
1795
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1796d_sigsetjmp (d_sigsetjmp.U):
1797 This variable conditionally defines the HAS_SIGSETJMP symbol,
1798 which indicates that the sigsetjmp() routine is available to
1799 call setjmp() and optionally save the process's signal mask.
1800
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1801d_sockatmark (d_sockatmark.U):
1802 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1803 indicates to the C program that the sockatmark() routine is available.
1804
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1805d_sockatmarkproto (d_sockatmarkproto.U):
1806 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1807 which indicates to the C program that the system provides
1808 a prototype for the sockatmark() function. Otherwise, it is
1809 up to the program to supply one.
1810
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1811d_socket (d_socket.U):
1812 This variable conditionally defines HAS_SOCKET, which indicates
1813 that the BSD socket interface is supported.
1814
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JH
1815d_socklen_t (d_socklen_t.U):
1816 This symbol will be defined if the C compiler supports socklen_t.
1817
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1818d_sockpair (d_socket.U):
1819 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1820 indicates that the BSD socketpair() is supported.
1821
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JH
1822d_socks5_init (d_socks5_init.U):
1823 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1824 indicates to the C program that the socks5_init() routine is available.
1825
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1826d_sqrtl (d_sqrtl.U):
1827 This variable conditionally defines the HAS_SQRTL symbol, which
1828 indicates to the C program that the sqrtl() routine is available.
1829
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1830d_srand48_r (d_srand48_r.U):
1831 This variable conditionally defines the HAS_SRAND48_R symbol,
1832 which indicates to the C program that the srand48_r()
1833 routine is available.
1834
1835d_srandom_r (d_srandom_r.U):
1836 This variable conditionally defines the HAS_SRANDOM_R symbol,
1837 which indicates to the C program that the srandom_r()
1838 routine is available.
1839
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1840d_sresgproto (d_sresgproto.U):
1841 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1842 which indicates to the C program that the system provides
1843 a prototype for the setresgid() function. Otherwise, it is
1844 up to the program to supply one.
1845
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1846d_sresuproto (d_sresuproto.U):
1847 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1848 which indicates to the C program that the system provides
1849 a prototype for the setresuid() function. Otherwise, it is
1850 up to the program to supply one.
1851
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1852d_statblks (d_statblks.U):
1853 This variable conditionally defines USE_STAT_BLOCKS
1854 if this system has a stat structure declaring
1855 st_blksize and st_blocks.
1856
ad27e871 1857d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1858 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
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1859 symbol, which indicates to struct statfs from has f_flags member.
1860 This kind of struct statfs is coming from sys/mount.h (BSD),
1861 not from sys/statfs.h (SYSV).
1862
ad27e871 1863d_statfs_s (d_statfs_s.U):
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JH
1864 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1865 which indicates that the struct statfs is supported.
1866
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1867d_statvfs (d_statvfs.U):
1868 This variable conditionally defines the HAS_STATVFS symbol, which
1869 indicates to the C program that the statvfs() routine is available.
1870
1871d_stdio_cnt_lval (d_stdstdio.U):
1872 This variable conditionally defines STDIO_CNT_LVALUE if the
1873 FILE_cnt macro can be used as an lvalue.
1874
1875d_stdio_ptr_lval (d_stdstdio.U):
1876 This variable conditionally defines STDIO_PTR_LVALUE if the
1877 FILE_ptr macro can be used as an lvalue.
1878
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NC
1879d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1880 This symbol is defined if using the FILE_ptr macro as an lvalue
1881 to increase the pointer by n leaves File_cnt(fp) unchanged.
1882
1883d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1884 This symbol is defined if using the FILE_ptr macro as an lvalue
1885 to increase the pointer by n has the side effect of decreasing the
1886 value of File_cnt(fp) by n.
1887
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1888d_stdio_stream_array (stdio_streams.U):
1889 This variable tells whether there is an array holding
1890 the stdio streams.
1891
1892d_stdiobase (d_stdstdio.U):
1893 This variable conditionally defines USE_STDIO_BASE if this system
1894 has a FILE structure declaring a usable _base field (or equivalent)
1895 in stdio.h.
1896
1897d_stdstdio (d_stdstdio.U):
1898 This variable conditionally defines USE_STDIO_PTR if this system
1899 has a FILE structure declaring usable _ptr and _cnt fields (or
1900 equivalent) in stdio.h.
1901
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1902d_strchr (d_strchr.U):
1903 This variable conditionally defines HAS_STRCHR if strchr() and
1904 strrchr() are available for string searching.
1905
1906d_strcoll (d_strcoll.U):
1907 This variable conditionally defines HAS_STRCOLL if strcoll() is
1908 available to compare strings using collating information.
1909
1910d_strctcpy (d_strctcpy.U):
1911 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1912 indicates to the C program that this C compiler knows how to copy
1913 structures.
1914
1915d_strerrm (d_strerror.U):
1916 This variable holds what Strerrr is defined as to translate an error
1917 code condition into an error message string. It could be 'strerror'
1918 or a more complex macro emulating strrror with sys_errlist[], or the
1919 "unknown" string when both strerror and sys_errlist are missing.
1920
1921d_strerror (d_strerror.U):
1922 This variable conditionally defines HAS_STRERROR if strerror() is
1923 available to translate error numbers to strings.
1924
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1925d_strerror_r (d_strerror_r.U):
1926 This variable conditionally defines the HAS_STRERROR_R symbol,
1927 which indicates to the C program that the strerror_r()
1928 routine is available.
1929
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1930d_strftime (d_strftime.U):
1931 This variable conditionally defines the HAS_STRFTIME symbol, which
1932 indicates to the C program that the strftime() routine is available.
1933
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1934d_strtod (d_strtod.U):
1935 This variable conditionally defines the HAS_STRTOD symbol, which
1936 indicates to the C program that the strtod() routine is available
1937 to provide better numeric string conversion than atof().
1938
1939d_strtol (d_strtol.U):
1940 This variable conditionally defines the HAS_STRTOL symbol, which
1941 indicates to the C program that the strtol() routine is available
1942 to provide better numeric string conversion than atoi() and friends.
1943
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1944d_strtold (d_strtold.U):
1945 This variable conditionally defines the HAS_STRTOLD symbol, which
1946 indicates to the C program that the strtold() routine is available.
1947
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1948d_strtoll (d_strtoll.U):
1949 This variable conditionally defines the HAS_STRTOLL symbol, which
1950 indicates to the C program that the strtoll() routine is available.
1951
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NC
1952d_strtoq (d_strtoq.U):
1953 This variable conditionally defines the HAS_STRTOQ symbol, which
1954 indicates to the C program that the strtoq() routine is available.
1955
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1956d_strtoul (d_strtoul.U):
1957 This variable conditionally defines the HAS_STRTOUL symbol, which
1958 indicates to the C program that the strtoul() routine is available
1959 to provide conversion of strings to unsigned long.
1960
ff935051 1961d_strtoull (d_strtoull.U):
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JH
1962 This variable conditionally defines the HAS_STRTOULL symbol, which
1963 indicates to the C program that the strtoull() routine is available.
1964
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1965d_strtouq (d_strtouq.U):
1966 This variable conditionally defines the HAS_STRTOUQ symbol, which
1967 indicates to the C program that the strtouq() routine is available.
1968
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1969d_strxfrm (d_strxfrm.U):
1970 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1971 available to transform strings.
1972
1973d_suidsafe (d_dosuid.U):
1974 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1975 if setuid scripts can be secure. This test looks in /dev/fd/.
1976
1977d_symlink (d_symlink.U):
1978 This variable conditionally defines the HAS_SYMLINK symbol, which
1979 indicates to the C program that the symlink() routine is available
1980 to create symbolic links.
1981
1982d_syscall (d_syscall.U):
1983 This variable conditionally defines HAS_SYSCALL if syscall() is
1984 available call arbitrary system calls.
1985
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1986d_syscallproto (d_syscallproto.U):
1987 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1988 which indicates to the C program that the system provides
1989 a prototype for the syscall() function. Otherwise, it is
1990 up to the program to supply one.
1991
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1992d_sysconf (d_sysconf.U):
1993 This variable conditionally defines the HAS_SYSCONF symbol, which
1994 indicates to the C program that the sysconf() routine is available
1995 to determine system related limits and options.
1996
1997d_sysernlst (d_strerror.U):
1998 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1999 is available to translate error numbers to the symbolic name.
2000
2001d_syserrlst (d_strerror.U):
2002 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2003 available to translate error numbers to strings.
2004
2005d_system (d_system.U):
2006 This variable conditionally defines HAS_SYSTEM if system() is
2007 available to issue a shell command.
2008
2009d_tcgetpgrp (d_tcgtpgrp.U):
2010 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2011 indicates to the C program that the tcgetpgrp() routine is available.
2012 to get foreground process group ID.
2013
2014d_tcsetpgrp (d_tcstpgrp.U):
2015 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2016 indicates to the C program that the tcsetpgrp() routine is available
2017 to set foreground process group ID.
2018
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2019d_telldir (d_readdir.U):
2020 This variable conditionally defines HAS_TELLDIR if telldir() is
2021 available.
2022
2023d_telldirproto (d_telldirproto.U):
2024 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2025 which indicates to the C program that the system provides
2026 a prototype for the telldir() function. Otherwise, it is
2027 up to the program to supply one.
2028
2029d_time (d_time.U):
2030 This variable conditionally defines the HAS_TIME symbol, which indicates
2031 that the time() routine exists. The time() routine is normaly
2032 provided on UNIX systems.
2033
2034d_times (d_times.U):
2035 This variable conditionally defines the HAS_TIMES symbol, which indicates
2036 that the times() routine exists. The times() routine is normaly
2037 provided on UNIX systems. You may have to include <sys/times.h>.
2038
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2039d_tm_tm_gmtoff (i_time.U):
2040 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2041 indicates to the C program that the struct tm has the tm_gmtoff field.
2042
2043d_tm_tm_zone (i_time.U):
2044 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2045 indicates to the C program that the struct tm has the tm_zone field.
2046
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2047d_tmpnam_r (d_tmpnam_r.U):
2048 This variable conditionally defines the HAS_TMPNAM_R symbol,
2049 which indicates to the C program that the tmpnam_r()
2050 routine is available.
2051
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2052d_truncate (d_truncate.U):
2053 This variable conditionally defines HAS_TRUNCATE if truncate() is
2054 available to truncate files.
2055
10bc17b6
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2056d_ttyname_r (d_ttyname_r.U):
2057 This variable conditionally defines the HAS_TTYNAME_R symbol,
2058 which indicates to the C program that the ttyname_r()
2059 routine is available.
2060
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2061d_tzname (d_tzname.U):
2062 This variable conditionally defines HAS_TZNAME if tzname[] is
2063 available to access timezone names.
2064
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2065d_u32align (d_u32align.U):
2066 This variable tells whether you must access character data
2067 through U32-aligned pointers.
2068
2069d_ualarm (d_ualarm.U):
2070 This variable conditionally defines the HAS_UALARM symbol, which
2071 indicates to the C program that the ualarm() routine is available.
2072
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2073d_umask (d_umask.U):
2074 This variable conditionally defines the HAS_UMASK symbol, which
2075 indicates to the C program that the umask() routine is available.
2076 to set and get the value of the file creation mask.
2077
2078d_uname (d_gethname.U):
2079 This variable conditionally defines the HAS_UNAME symbol, which
2080 indicates to the C program that the uname() routine may be
2081 used to derive the host name.
2082
2083d_union_semun (d_union_semun.U):
2084 This variable conditionally defines HAS_UNION_SEMUN if the
2085 union semun is defined by including <sys/sem.h>.
2086
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2087d_unordered (d_unordered.U):
2088 This variable conditionally defines the HAS_UNORDERED symbol, which
2089 indicates to the C program that the unordered() routine is available.
2090
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2091d_usleep (d_usleep.U):
2092 This variable conditionally defines HAS_USLEEP if usleep() is
2093 available to do high granularity sleeps.
2094
5af95cda
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2095d_usleepproto (d_usleepproto.U):
2096 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2097 which indicates to the C program that the system provides
2098 a prototype for the usleep() function. Otherwise, it is
2099 up to the program to supply one.
2100
0545a864
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2101d_ustat (d_ustat.U):
2102 This variable conditionally defines HAS_USTAT if ustat() is
2103 available to query file system statistics by dev_t.
2104
526fdc24
MS
2105d_vendorarch (vendorarch.U):
2106 This variable conditionally defined PERL_VENDORARCH.
2107
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2108d_vendorbin (vendorbin.U):
2109 This variable conditionally defines PERL_VENDORBIN.
2110
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2111d_vendorlib (vendorlib.U):
2112 This variable conditionally defines PERL_VENDORLIB.
2113
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2114d_vfork (d_vfork.U):
2115 This variable conditionally defines the HAS_VFORK symbol, which
2116 indicates the vfork() routine is available.
2117
2118d_void_closedir (d_closedir.U):
2119 This variable conditionally defines VOID_CLOSEDIR if closedir()
2120 does not return a value.
2121
2122d_voidsig (d_voidsig.U):
2123 This variable conditionally defines VOIDSIG if this system
2124 declares "void (*signal(...))()" in signal.h. The old way was to
2125 declare it as "int (*signal(...))()".
2126
2127d_voidtty (i_sysioctl.U):
2128 This variable conditionally defines USE_IOCNOTTY to indicate that the
2129 ioctl() call with TIOCNOTTY should be used to void tty association.
2130 Otherwise (on USG probably), it is enough to close the standard file
2131 decriptors and do a setpgrp().
2132
2133d_volatile (d_volatile.U):
2134 This variable conditionally defines the HASVOLATILE symbol, which
2135 indicates to the C program that this C compiler knows about the
2136 volatile declaration.
2137
2138d_vprintf (d_vprintf.U):
2139 This variable conditionally defines the HAS_VPRINTF symbol, which
2140 indicates to the C program that the vprintf() routine is available
2141 to printf with a pointer to an argument list.
2142
2143d_wait4 (d_wait4.U):
2144 This variable conditionally defines the HAS_WAIT4 symbol, which
2145 indicates the wait4() routine is available.
2146
2147d_waitpid (d_waitpid.U):
2148 This variable conditionally defines HAS_WAITPID if waitpid() is
2149 available to wait for child process.
2150
2151d_wcstombs (d_wcstombs.U):
2152 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2153 indicates to the C program that the wcstombs() routine is available
2154 to convert wide character strings to multibyte strings.
2155
2156d_wctomb (d_wctomb.U):
2157 This variable conditionally defines the HAS_WCTOMB symbol, which
2158 indicates to the C program that the wctomb() routine is available
2159 to convert a wide character to a multibyte.
2160
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2161d_writev (d_writev.U):
2162 This variable conditionally defines the HAS_WRITEV symbol, which
2163 indicates to the C program that the writev() routine is available.
2164
781b178c
JH
2165d_xenix (Guess.U):
2166 This variable conditionally defines the symbol XENIX, which alerts
2167 the C program that it runs under Xenix.
2168
2169date (Loc.U):
5bf26616 2170 This variable is used internally by Configure to determine the
781b178c
JH
2171 full pathname (if any) of the date program. After Configure runs,
2172 the value is reset to a plain "date" and is not useful.
2173
2174db_hashtype (i_db.U):
2175 This variable contains the type of the hash structure element
2176 in the <db.h> header file. In older versions of DB, it was
2177 int, while in newer ones it is u_int32_t.
2178
2179db_prefixtype (i_db.U):
2180 This variable contains the type of the prefix structure element
2181 in the <db.h> header file. In older versions of DB, it was
2182 int, while in newer ones it is size_t.
2183
640374d0
JH
2184db_version_major (i_db.U):
2185 This variable contains the major version number of
2186 Berkeley DB found in the <db.h> header file.
2187
2188db_version_minor (i_db.U):
2189 This variable contains the minor version number of
2190 Berkeley DB found in the <db.h> header file.
2191 For DB version 1 this is always 0.
2192
2193db_version_patch (i_db.U):
2194 This variable contains the patch version number of
2195 Berkeley DB found in the <db.h> header file.
2196 For DB version 1 this is always 0.
2197
781b178c
JH
2198defvoidused (voidflags.U):
2199 This variable contains the default value of the VOIDUSED symbol (15).
2200
2201direntrytype (i_dirent.U):
2202 This symbol is set to 'struct direct' or 'struct dirent' depending on
2203 whether dirent is available or not. You should use this pseudo type to
2204 portably declare your directory entries.
2205
2206dlext (dlext.U):
2207 This variable contains the extension that is to be used for the
2208 dynamically loaded modules that perl generaties.
2209
2210dlsrc (dlsrc.U):
2211 This variable contains the name of the dynamic loading file that
2212 will be used with the package.
2213
2214doublesize (doublesize.U):
2215 This variable contains the value of the DOUBLESIZE symbol, which
2216 indicates to the C program how many bytes there are in a double.
2217
2218drand01 (randfunc.U):
2219 Indicates the macro to be used to generate normalized
2220 random numbers. Uses randfunc, often divided by
2221 (double) (((unsigned long) 1 << randbits)) in order to
2222 normalize the result.
2223 In C programs, the macro 'Drand01' is mapped to drand01.
2224
10bc17b6
JH
2225drand48_r_proto (d_drand48_r.U):
2226 This variable encodes the prototype of drand48_r.
39183afa
JH
2227 It is zero if d_drand48_r is undef, and one of the
2228 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2229 is defined.
10bc17b6 2230
781b178c
JH
2231dynamic_ext (Extensions.U):
2232 This variable holds a list of XS extension files we want to
2233 link dynamically into the package. It is used by Makefile.
2234
2235eagain (nblock_io.U):
2236 This variable bears the symbolic errno code set by read() when no
2237 data is present on the file and non-blocking I/O was enabled (otherwise,
2238 read() blocks naturally).
2239
2240ebcdic (ebcdic.U):
2241 This variable conditionally defines EBCDIC if this
2242 system uses EBCDIC encoding. Among other things, this
2243 means that the character ranges are not contiguous.
2244 See trnl.U
2245
2246echo (Loc.U):
5bf26616 2247 This variable is used internally by Configure to determine the
781b178c
JH
2248 full pathname (if any) of the echo program. After Configure runs,
2249 the value is reset to a plain "echo" and is not useful.
2250
2251egrep (Loc.U):
5bf26616 2252 This variable is used internally by Configure to determine the
781b178c
JH
2253 full pathname (if any) of the egrep program. After Configure runs,
2254 the value is reset to a plain "egrep" and is not useful.
2255
2256emacs (Loc.U):
2257 This variable is defined but not used by Configure.
2258 The value is a plain '' and is not useful.
2259
10bc17b6
JH
2260endgrent_r_proto (d_endgrent_r.U):
2261 This variable encodes the prototype of endgrent_r.
39183afa
JH
2262 It is zero if d_endgrent_r is undef, and one of the
2263 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2264 is defined.
10bc17b6
JH
2265
2266endhostent_r_proto (d_endhostent_r.U):
2267 This variable encodes the prototype of endhostent_r.
39183afa
JH
2268 It is zero if d_endhostent_r is undef, and one of the
2269 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2270 is defined.
10bc17b6
JH
2271
2272endnetent_r_proto (d_endnetent_r.U):
2273 This variable encodes the prototype of endnetent_r.
39183afa
JH
2274 It is zero if d_endnetent_r is undef, and one of the
2275 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2276 is defined.
10bc17b6
JH
2277
2278endprotoent_r_proto (d_endprotoent_r.U):
2279 This variable encodes the prototype of endprotoent_r.
39183afa
JH
2280 It is zero if d_endprotoent_r is undef, and one of the
2281 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2282 is defined.
10bc17b6
JH
2283
2284endpwent_r_proto (d_endpwent_r.U):
2285 This variable encodes the prototype of endpwent_r.
39183afa
JH
2286 It is zero if d_endpwent_r is undef, and one of the
2287 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2288 is defined.
10bc17b6
JH
2289
2290endservent_r_proto (d_endservent_r.U):
2291 This variable encodes the prototype of endservent_r.
39183afa
JH
2292 It is zero if d_endservent_r is undef, and one of the
2293 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2294 is defined.
10bc17b6 2295
781b178c
JH
2296eunicefix (Init.U):
2297 When running under Eunice this variable contains a command which will
2298 convert a shell script to the proper form of text file for it to be
2299 executable by the shell. On other systems it is a no-op.
2300
2301exe_ext (Unix.U):
2302 This is an old synonym for _exe.
2303
2304expr (Loc.U):
5bf26616 2305 This variable is used internally by Configure to determine the
781b178c
JH
2306 full pathname (if any) of the expr program. After Configure runs,
2307 the value is reset to a plain "expr" and is not useful.
2308
2309extensions (Extensions.U):
2310 This variable holds a list of all extension files (both XS and
2311 non-xs linked into the package. It is propagated to Config.pm
2312 and is typically used to test whether a particular extesion
2313 is available.
2314
cb7ddd31
JH
2315extras (Extras.U):
2316 This variable holds a list of extra modules to install.
2317
781b178c
JH
2318fflushall (fflushall.U):
2319 This symbol, if defined, tells that to flush
2320 all pending stdio output one must loop through all
2321 the stdio file handles stored in an array and fflush them.
2322 Note that if fflushNULL is defined, fflushall will not
2323 even be probed for and will be left undefined.
2324
ff935051
JH
2325fflushNULL (fflushall.U):
2326 This symbol, if defined, tells that fflush(NULL) does flush
2327 all pending stdio output.
2328
781b178c 2329find (Loc.U):
ff935051
JH
2330 This variable is defined but not used by Configure.
2331 The value is a plain '' and is not useful.
781b178c
JH
2332
2333firstmakefile (Unix.U):
2334 This variable defines the first file searched by make. On unix,
2335 it is makefile (then Makefile). On case-insensitive systems,
2336 it might be something else. This is only used to deal with
2337 convoluted make depend tricks.
2338
2339flex (Loc.U):
2340 This variable is defined but not used by Configure.
2341 The value is a plain '' and is not useful.
2342
a22e52b9
JH
2343fpossize (fpossize.U):
2344 This variable contains the size of a fpostype in bytes.
2345
781b178c 2346fpostype (fpostype.U):
a22e52b9 2347 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2348 uint, or whatever type is used to declare file positions in libc.
2349
2350freetype (mallocsrc.U):
2351 This variable contains the return type of free(). It is usually
2352 void, but occasionally int.
2353
5440bc8e
JH
2354from (Cross.U):
2355 This variable contains the command used by Configure
2356 to copy files from the target host. Useful and available
2357 only during Perl build.
2358 The string ':' if not cross-compiling.
2359
781b178c
JH
2360full_ar (Loc_ar.U):
2361 This variable contains the full pathname to 'ar', whether or
2362 not the user has specified 'portability'. This is only used
2363 in the Makefile.SH.
2364
2365full_csh (d_csh.U):
2366 This variable contains the full pathname to 'csh', whether or
2367 not the user has specified 'portability'. This is only used
2368 in the compiled C program, and we assume that all systems which
2369 can share this executable will have the same full pathname to
2370 'csh.'
2371
2372full_sed (Loc_sed.U):
2373 This variable contains the full pathname to 'sed', whether or
2374 not the user has specified 'portability'. This is only used
2375 in the compiled C program, and we assume that all systems which
2376 can share this executable will have the same full pathname to
2377 'sed.'
2378
af960fef
JH
2379gccosandvers (gccvers.U):
2380 If GNU cc (gcc) is used, this variable the operating system and
2381 version used to compile the gcc. It is set to '' if not gcc,
2382 or if nothing useful can be parsed as the os version.
2383
2384gccversion (gccvers.U):
781b178c
JH
2385 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2386 indicate whether the compiler is version 1 or 2. This is used in
2387 setting some of the default cflags. It is set to '' if not gcc.
2388
10bc17b6
JH
2389getgrent_r_proto (d_getgrent_r.U):
2390 This variable encodes the prototype of getgrent_r.
39183afa
JH
2391 It is zero if d_getgrent_r is undef, and one of the
2392 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2393 is defined.
10bc17b6
JH
2394
2395getgrgid_r_proto (d_getgrgid_r.U):
2396 This variable encodes the prototype of getgrgid_r.
39183afa
JH
2397 It is zero if d_getgrgid_r is undef, and one of the
2398 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2399 is defined.
10bc17b6
JH
2400
2401getgrnam_r_proto (d_getgrnam_r.U):
2402 This variable encodes the prototype of getgrnam_r.
39183afa
JH
2403 It is zero if d_getgrnam_r is undef, and one of the
2404 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2405 is defined.
10bc17b6
JH
2406
2407gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2408 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
2409 It is zero if d_gethostbyaddr_r is undef, and one of the
2410 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2411 is defined.
10bc17b6
JH
2412
2413gethostbyname_r_proto (d_gethostbyname_r.U):
2414 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
2415 It is zero if d_gethostbyname_r is undef, and one of the
2416 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2417 is defined.
10bc17b6
JH
2418
2419gethostent_r_proto (d_gethostent_r.U):
2420 This variable encodes the prototype of gethostent_r.
39183afa
JH
2421 It is zero if d_gethostent_r is undef, and one of the
2422 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2423 is defined.
10bc17b6
JH
2424
2425getlogin_r_proto (d_getlogin_r.U):
2426 This variable encodes the prototype of getlogin_r.
39183afa
JH
2427 It is zero if d_getlogin_r is undef, and one of the
2428 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2429 is defined.
10bc17b6
JH
2430
2431getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2432 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
2433 It is zero if d_getnetbyaddr_r is undef, and one of the
2434 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2435 is defined.
10bc17b6
JH
2436
2437getnetbyname_r_proto (d_getnetbyname_r.U):
2438 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
2439 It is zero if d_getnetbyname_r is undef, and one of the
2440 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2441 is defined.
10bc17b6
JH
2442
2443getnetent_r_proto (d_getnetent_r.U):
2444 This variable encodes the prototype of getnetent_r.
39183afa
JH
2445 It is zero if d_getnetent_r is undef, and one of the
2446 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2447 is defined.
10bc17b6
JH
2448
2449getprotobyname_r_proto (d_getprotobyname_r.U):
2450 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
2451 It is zero if d_getprotobyname_r is undef, and one of the
2452 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2453 is defined.
10bc17b6
JH
2454
2455getprotobynumber_r_proto (d_getprotobynumber_r.U):
2456 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
2457 It is zero if d_getprotobynumber_r is undef, and one of the
2458 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2459 is defined.
10bc17b6
JH
2460
2461getprotoent_r_proto (d_getprotoent_r.U):
2462 This variable encodes the prototype of getprotoent_r.
39183afa
JH
2463 It is zero if d_getprotoent_r is undef, and one of the
2464 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2465 is defined.
10bc17b6
JH
2466
2467getpwent_r_proto (d_getpwent_r.U):
2468 This variable encodes the prototype of getpwent_r.
39183afa
JH
2469 It is zero if d_getpwent_r is undef, and one of the
2470 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2471 is defined.
10bc17b6
JH
2472
2473getpwnam_r_proto (d_getpwnam_r.U):
2474 This variable encodes the prototype of getpwnam_r.
39183afa
JH
2475 It is zero if d_getpwnam_r is undef, and one of the
2476 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2477 is defined.
10bc17b6
JH
2478
2479getpwuid_r_proto (d_getpwuid_r.U):
2480 This variable encodes the prototype of getpwuid_r.
39183afa
JH
2481 It is zero if d_getpwuid_r is undef, and one of the
2482 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2483 is defined.
10bc17b6
JH
2484
2485getservbyname_r_proto (d_getservbyname_r.U):
2486 This variable encodes the prototype of getservbyname_r.
39183afa
JH
2487 It is zero if d_getservbyname_r is undef, and one of the
2488 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2489 is defined.
10bc17b6
JH
2490
2491getservbyport_r_proto (d_getservbyport_r.U):
2492 This variable encodes the prototype of getservbyport_r.
39183afa
JH
2493 It is zero if d_getservbyport_r is undef, and one of the
2494 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2495 is defined.
10bc17b6
JH
2496
2497getservent_r_proto (d_getservent_r.U):
2498 This variable encodes the prototype of getservent_r.
39183afa
JH
2499 It is zero if d_getservent_r is undef, and one of the
2500 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2501 is defined.
10bc17b6
JH
2502
2503getspnam_r_proto (d_getspnam_r.U):
2504 This variable encodes the prototype of getspnam_r.
39183afa
JH
2505 It is zero if d_getspnam_r is undef, and one of the
2506 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2507 is defined.
10bc17b6 2508
a22e52b9
JH
2509gidformat (gidf.U):
2510 This variable contains the format string used for printing a Gid_t.
2511
785fb66b
JH
2512gidsign (gidsign.U):
2513 This variable contains the signedness of a gidtype.
2514 1 for unsigned, -1 for signed.
2515
2516gidsize (gidsize.U):
2517 This variable contains the size of a gidtype in bytes.
2518
781b178c
JH
2519gidtype (gidtype.U):
2520 This variable defines Gid_t to be something like gid_t, int,
2521 ushort, or whatever type is used to declare the return type
2522 of getgid(). Typically, it is the type of group ids in the kernel.
2523
2524glibpth (libpth.U):
2525 This variable holds the general path (space-separated) used to
2526 find libraries. It may contain directories that do not exist on
2527 this platform, libpth is the cleaned-up version.
2528
c68a00c0
JH
2529gmake (Loc.U):
2530 This variable is used internally by Configure to determine the
2531 full pathname (if any) of the gmake program. After Configure runs,
2532 the value is reset to a plain "gmake" and is not useful.
2533
10bc17b6
JH
2534gmtime_r_proto (d_gmtime_r.U):
2535 This variable encodes the prototype of gmtime_r.
39183afa
JH
2536 It is zero if d_gmtime_r is undef, and one of the
2537 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2538 is defined.
10bc17b6 2539
781b178c 2540grep (Loc.U):
5bf26616 2541 This variable is used internally by Configure to determine the
781b178c
JH
2542 full pathname (if any) of the grep program. After Configure runs,
2543 the value is reset to a plain "grep" and is not useful.
2544
2545groupcat (nis.U):
2546 This variable contains a command that produces the text of the
2547 /etc/group file. This is normally "cat /etc/group", but can be
2548 "ypcat group" when NIS is used.
aaacdc8b
GS
2549 On some systems, such as os390, there may be no equivalent
2550 command, in which case this variable is unset.
781b178c
JH
2551
2552groupstype (groupstype.U):
2553 This variable defines Groups_t to be something like gid_t, int,
2554 ushort, or whatever type is used for the second argument to
2555 getgroups() and setgroups(). Usually, this is the same as
2556 gidtype (gid_t), but sometimes it isn't.
2557
2558gzip (Loc.U):
5bf26616 2559 This variable is used internally by Configure to determine the
781b178c
JH
2560 full pathname (if any) of the gzip program. After Configure runs,
2561 the value is reset to a plain "gzip" and is not useful.
2562
2563h_fcntl (h_fcntl.U):
2564 This is variable gets set in various places to tell i_fcntl that
2565 <fcntl.h> should be included.
2566
2567h_sysfile (h_sysfile.U):
2568 This is variable gets set in various places to tell i_sys_file that
2569 <sys/file.h> should be included.
2570
2571hint (Oldconfig.U):
2572 Gives the type of hints used for previous answers. May be one of
2573 "default", "recommended" or "previous".
2574
2575hostcat (nis.U):
2576 This variable contains a command that produces the text of the
2577 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2578 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2579 On some systems, such as os390, there may be no equivalent
2580 command, in which case this variable is unset.
781b178c 2581
a22e52b9
JH
2582i16size (perlxv.U):
2583 This variable is the size of an I16 in bytes.
2584
2585i16type (perlxv.U):
2586 This variable contains the C type used for Perl's I16.
2587
2588i32size (perlxv.U):
2589 This variable is the size of an I32 in bytes.
2590
2591i32type (perlxv.U):
2592 This variable contains the C type used for Perl's I32.
2593
2594i64size (perlxv.U):
2595 This variable is the size of an I64 in bytes.
2596
2597i64type (perlxv.U):
2598 This variable contains the C type used for Perl's I64.
2599
2600i8size (perlxv.U):
2601 This variable is the size of an I8 in bytes.
2602
2603i8type (perlxv.U):
2604 This variable contains the C type used for Perl's I8.
2605
781b178c
JH
2606i_arpainet (i_arpainet.U):
2607 This variable conditionally defines the I_ARPA_INET symbol,
2608 and indicates whether a C program should include <arpa/inet.h>.
2609
2610i_bsdioctl (i_sysioctl.U):
2611 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2612 indicates to the C program that <sys/bsdioctl.h> exists and should
2613 be included.
2614
10bc17b6
JH
2615i_crypt (i_crypt.U):
2616 This variable conditionally defines the I_CRYPT symbol, and indicates
2617 whether a C program should include <crypt.h>.
2618
781b178c
JH
2619i_db (i_db.U):
2620 This variable conditionally defines the I_DB symbol, and indicates
2621 whether a C program may include Berkeley's DB include file <db.h>.
2622
2623i_dbm (i_dbm.U):
2624 This variable conditionally defines the I_DBM symbol, which
2625 indicates to the C program that <dbm.h> exists and should
2626 be included.
2627
2628i_dirent (i_dirent.U):
2629 This variable conditionally defines I_DIRENT, which indicates
2630 to the C program that it should include <dirent.h>.
2631
2632i_dld (i_dld.U):
2633 This variable conditionally defines the I_DLD symbol, which
2634 indicates to the C program that <dld.h> (GNU dynamic loading)
2635 exists and should be included.
2636
2637i_dlfcn (i_dlfcn.U):
2638 This variable conditionally defines the I_DLFCN symbol, which
2639 indicates to the C program that <dlfcn.h> exists and should
2640 be included.
2641
2642i_fcntl (i_fcntl.U):
2643 This variable controls the value of I_FCNTL (which tells
2644 the C program to include <fcntl.h>).
2645
2646i_float (i_float.U):
2647 This variable conditionally defines the I_FLOAT symbol, and indicates
2648 whether a C program may include <float.h> to get symbols like DBL_MAX
2649 or DBL_MIN, i.e. machine dependent floating point values.
2650
758a5d79
JH
2651i_fp (i_fp.U):
2652 This variable conditionally defines the I_FP symbol, and indicates
2653 whether a C program should include <fp.h>.
2654
2655i_fp_class (i_fp_class.U):
2656 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2657 whether a C program should include <fp_class.h>.
2658
781b178c
JH
2659i_gdbm (i_gdbm.U):
2660 This variable conditionally defines the I_GDBM symbol, which
2661 indicates to the C program that <gdbm.h> exists and should
2662 be included.
2663
2664i_grp (i_grp.U):
2665 This variable conditionally defines the I_GRP symbol, and indicates
2666 whether a C program should include <grp.h>.
2667
792d8dab
JH
2668i_ieeefp (i_ieeefp.U):
2669 This variable conditionally defines the I_IEEEFP symbol, and indicates
2670 whether a C program should include <ieeefp.h>.
2671
781b178c
JH
2672i_inttypes (i_inttypes.U):
2673 This variable conditionally defines the I_INTTYPES symbol,
2674 and indicates whether a C program should include <inttypes.h>.
2675
2765b840
JH
2676i_langinfo (i_langinfo.U):
2677 This variable conditionally defines the I_LANGINFO symbol,
2678 and indicates whether a C program should include <langinfo.h>.
2679
af960fef
JH
2680i_libutil (i_libutil.U):
2681 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2682 whether a C program should include <libutil.h>.
2683
781b178c
JH
2684i_limits (i_limits.U):
2685 This variable conditionally defines the I_LIMITS symbol, and indicates
2686 whether a C program may include <limits.h> to get symbols like WORD_BIT
2687 and friends.
2688
2689i_locale (i_locale.U):
2690 This variable conditionally defines the I_LOCALE symbol,
2691 and indicates whether a C program should include <locale.h>.
2692
2693i_machcthr (i_machcthr.U):
2694 This variable conditionally defines the I_MACH_CTHREADS symbol,
2695 and indicates whether a C program should include <mach/cthreads.h>.
2696
2697i_malloc (i_malloc.U):
2698 This variable conditionally defines the I_MALLOC symbol, and indicates
2699 whether a C program should include <malloc.h>.
2700
2701i_math (i_math.U):
2702 This variable conditionally defines the I_MATH symbol, and indicates
2703 whether a C program may include <math.h>.
2704
2705i_memory (i_memory.U):
2706 This variable conditionally defines the I_MEMORY symbol, and indicates
2707 whether a C program should include <memory.h>.
2708
2709i_mntent (i_mntent.U):
2710 This variable conditionally defines the I_MNTENT symbol, and indicates
2711 whether a C program should include <mntent.h>.
2712
2713i_ndbm (i_ndbm.U):
2714 This variable conditionally defines the I_NDBM symbol, which
2715 indicates to the C program that <ndbm.h> exists and should
2716 be included.
2717
2718i_netdb (i_netdb.U):
2719 This variable conditionally defines the I_NETDB symbol, and indicates
2720 whether a C program should include <netdb.h>.
2721
2722i_neterrno (i_neterrno.U):
2723 This variable conditionally defines the I_NET_ERRNO symbol, which
2724 indicates to the C program that <net/errno.h> exists and should
2725 be included.
2726
2727i_netinettcp (i_netinettcp.U):
2728 This variable conditionally defines the I_NETINET_TCP symbol,
2729 and indicates whether a C program should include <netinet/tcp.h>.
2730
2731i_niin (i_niin.U):
2732 This variable conditionally defines I_NETINET_IN, which indicates
2733 to the C program that it should include <netinet/in.h>. Otherwise,
2734 you may try <sys/in.h>.
2735
2736i_poll (i_poll.U):
2737 This variable conditionally defines the I_POLL symbol, and indicates
2738 whether a C program should include <poll.h>.
2739
3813c136
JH
2740i_prot (i_prot.U):
2741 This variable conditionally defines the I_PROT symbol, and indicates
2742 whether a C program should include <prot.h>.
2743
781b178c 2744i_pthread (i_pthread.U):
190b66db 2745 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2746 and indicates whether a C program should include <pthread.h>.
2747
2748i_pwd (i_pwd.U):
2749 This variable conditionally defines I_PWD, which indicates
2750 to the C program that it should include <pwd.h>.
2751
2752i_rpcsvcdbm (i_dbm.U):
2753 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2754 indicates to the C program that <rpcsvc/dbm.h> exists and should
2755 be included. Some System V systems might need this instead of <dbm.h>.
2756
2757i_sfio (i_sfio.U):
2758 This variable conditionally defines the I_SFIO symbol,
2759 and indicates whether a C program should include <sfio.h>.
2760
2761i_sgtty (i_termio.U):
2762 This variable conditionally defines the I_SGTTY symbol, which
2763 indicates to the C program that it should include <sgtty.h> rather
2764 than <termio.h>.
2765
2766i_shadow (i_shadow.U):
2767 This variable conditionally defines the I_SHADOW symbol, and indicates
2768 whether a C program should include <shadow.h>.
2769
2770i_socks (i_socks.U):
2771 This variable conditionally defines the I_SOCKS symbol, and indicates
2772 whether a C program should include <socks.h>.
2773
2774i_stdarg (i_varhdr.U):
2775 This variable conditionally defines the I_STDARG symbol, which
2776 indicates to the C program that <stdarg.h> exists and should
2777 be included.
2778
2779i_stddef (i_stddef.U):
2780 This variable conditionally defines the I_STDDEF symbol, which
2781 indicates to the C program that <stddef.h> exists and should
2782 be included.
2783
2784i_stdlib (i_stdlib.U):
2785 This variable conditionally defines the I_STDLIB symbol, which
2786 indicates to the C program that <stdlib.h> exists and should
2787 be included.
2788
2789i_string (i_string.U):
2790 This variable conditionally defines the I_STRING symbol, which
2791 indicates that <string.h> should be included rather than <strings.h>.
2792
792d8dab
JH
2793i_sunmath (i_sunmath.U):
2794 This variable conditionally defines the I_SUNMATH symbol, and indicates
2795 whether a C program should include <sunmath.h>.
2796
781b178c
JH
2797i_sysaccess (i_sysaccess.U):
2798 This variable conditionally defines the I_SYS_ACCESS symbol,
2799 and indicates whether a C program should include <sys/access.h>.
2800
2801i_sysdir (i_sysdir.U):
2802 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2803 whether a C program should include <sys/dir.h>.
2804
2805i_sysfile (i_sysfile.U):
2806 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2807 whether a C program should include <sys/file.h> to get R_OK and friends.
2808
2809i_sysfilio (i_sysioctl.U):
2810 This variable conditionally defines the I_SYS_FILIO symbol, which
2811 indicates to the C program that <sys/filio.h> exists and should
2812 be included in preference to <sys/ioctl.h>.
2813
2814i_sysin (i_niin.U):
2815 This variable conditionally defines I_SYS_IN, which indicates
2816 to the C program that it should include <sys/in.h> instead of
2817 <netinet/in.h>.
2818
2819i_sysioctl (i_sysioctl.U):
2820 This variable conditionally defines the I_SYS_IOCTL symbol, which
2821 indicates to the C program that <sys/ioctl.h> exists and should
2822 be included.
2823
ca52efda
JH
2824i_syslog (i_syslog.U):
2825 This variable conditionally defines the I_SYSLOG symbol,
2826 and indicates whether a C program should include <syslog.h>.
2827
fe749a9f
JH
2828i_sysmman (i_sysmman.U):
2829 This variable conditionally defines the I_SYS_MMAN symbol, and
2830 indicates whether a C program should include <sys/mman.h>.
2831
87b71857
JH
2832i_sysmode (i_sysmode.U):
2833 This variable conditionally defines the I_SYSMODE symbol,
2834 and indicates whether a C program should include <sys/mode.h>.
2835
781b178c
JH
2836i_sysmount (i_sysmount.U):
2837 This variable conditionally defines the I_SYSMOUNT symbol,
2838 and indicates whether a C program should include <sys/mount.h>.
2839
2840i_sysndir (i_sysndir.U):
2841 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2842 whether a C program should include <sys/ndir.h>.
2843
2844i_sysparam (i_sysparam.U):
2845 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2846 whether a C program should include <sys/param.h>.
2847
2848i_sysresrc (i_sysresrc.U):
2849 This variable conditionally defines the I_SYS_RESOURCE symbol,
2850 and indicates whether a C program should include <sys/resource.h>.
2851
2852i_syssecrt (i_syssecrt.U):
2853 This variable conditionally defines the I_SYS_SECURITY symbol,
2854 and indicates whether a C program should include <sys/security.h>.
2855
2856i_sysselct (i_sysselct.U):
2857 This variable conditionally defines I_SYS_SELECT, which indicates
2858 to the C program that it should include <sys/select.h> in order to
2859 get the definition of struct timeval.
2860
2861i_syssockio (i_sysioctl.U):
2862 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2863 C program that socket ioctl codes may be found in <sys/sockio.h>
2864 instead of <sys/ioctl.h>.
2865
2866i_sysstat (i_sysstat.U):
2867 This variable conditionally defines the I_SYS_STAT symbol,
2868 and indicates whether a C program should include <sys/stat.h>.
2869
0545a864
JH
2870i_sysstatfs (i_sysstatfs.U):
2871 This variable conditionally defines the I_SYSSTATFS symbol,
2872 and indicates whether a C program should include <sys/statfs.h>.
2873
781b178c
JH
2874i_sysstatvfs (i_sysstatvfs.U):
2875 This variable conditionally defines the I_SYSSTATVFS symbol,
2876 and indicates whether a C program should include <sys/statvfs.h>.
2877
2878i_systime (i_time.U):
2879 This variable conditionally defines I_SYS_TIME, which indicates
2880 to the C program that it should include <sys/time.h>.
2881
2882i_systimek (i_time.U):
2883 This variable conditionally defines I_SYS_TIME_KERNEL, which
2884 indicates to the C program that it should include <sys/time.h>
2885 with KERNEL defined.
2886
2887i_systimes (i_systimes.U):
2888 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2889 whether a C program should include <sys/times.h>.
2890
2891i_systypes (i_systypes.U):
2892 This variable conditionally defines the I_SYS_TYPES symbol,
2893 and indicates whether a C program should include <sys/types.h>.
2894
2895i_sysuio (i_sysuio.U):
2896 This variable conditionally defines the I_SYSUIO symbol, and indicates
2897 whether a C program should include <sys/uio.h>.
2898
2899i_sysun (i_sysun.U):
2900 This variable conditionally defines I_SYS_UN, which indicates
2901 to the C program that it should include <sys/un.h> to get UNIX
2902 domain socket definitions.
2903
d4935d7f
JH
2904i_sysutsname (i_sysutsname.U):
2905 This variable conditionally defines the I_SYSUTSNAME symbol,
2906 and indicates whether a C program should include <sys/utsname.h>.
2907
0545a864
JH
2908i_sysvfs (i_sysvfs.U):
2909 This variable conditionally defines the I_SYSVFS symbol,
2910 and indicates whether a C program should include <sys/vfs.h>.
2911
781b178c
JH
2912i_syswait (i_syswait.U):
2913 This variable conditionally defines I_SYS_WAIT, which indicates
2914 to the C program that it should include <sys/wait.h>.
2915
2916i_termio (i_termio.U):
2917 This variable conditionally defines the I_TERMIO symbol, which
2918 indicates to the C program that it should include <termio.h> rather
2919 than <sgtty.h>.
2920
2921i_termios (i_termio.U):
2922 This variable conditionally defines the I_TERMIOS symbol, which
2923 indicates to the C program that the POSIX <termios.h> file is
2924 to be included.
2925
2926i_time (i_time.U):
2927 This variable conditionally defines I_TIME, which indicates
2928 to the C program that it should include <time.h>.
2929
2930i_unistd (i_unistd.U):
2931 This variable conditionally defines the I_UNISTD symbol, and indicates
2932 whether a C program should include <unistd.h>.
2933
0545a864
JH
2934i_ustat (i_ustat.U):
2935 This variable conditionally defines the I_USTAT symbol, and indicates
2936 whether a C program should include <ustat.h>.
2937
781b178c
JH
2938i_utime (i_utime.U):
2939 This variable conditionally defines the I_UTIME symbol, and indicates
2940 whether a C program should include <utime.h>.
2941
2942i_values (i_values.U):
2943 This variable conditionally defines the I_VALUES symbol, and indicates
2944 whether a C program may include <values.h> to get symbols like MAXLONG
2945 and friends.
2946
2947i_varargs (i_varhdr.U):
2948 This variable conditionally defines I_VARARGS, which indicates
2949 to the C program that it should include <varargs.h>.
2950
2951i_varhdr (i_varhdr.U):
2952 Contains the name of the header to be included to get va_dcl definition.
2953 Typically one of varargs.h or stdarg.h.
2954
2955i_vfork (i_vfork.U):
2956 This variable conditionally defines the I_VFORK symbol, and indicates
2957 whether a C program should include vfork.h.
2958
2959ignore_versioned_solibs (libs.U):
2960 This variable should be non-empty if non-versioned shared
2961 libraries (libfoo.so.x.y) are to be ignored (because they
2962 cannot be linked against).
2963
ff935051
JH
2964inc_version_list (inc_version_list.U):
2965 This variable specifies the list of subdirectories in over
2966 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
2967 search when adding directories to @INC. The elements in
2968 the list are separated by spaces. This is only useful
ff935051
JH
2969 if you have a perl library directory tree structured like the
2970 default one. See INSTALL for how this works. The versioned
2971 site_perl directory was introduced in 5.005, so that is the
2972 lowest possible value.
2973
3a096bf3
JH
2974inc_version_list_init (inc_version_list.U):
2975 This variable holds the same list as inc_version_list, but
2976 each item is enclosed in double quotes and separated by commas,
2977 suitable for use in the PERL_INC_VERSION_LIST initialization.
2978
781b178c 2979incpath (usrinc.U):
209e5c0a
JH
2980 This variable must preceed the normal include path to get hte
2981 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
2982 Value can be "" or "/bsd43" on mips.
2983
2984inews (Loc.U):
2985 This variable is defined but not used by Configure.
2986 The value is a plain '' and is not useful.
2987
2988installarchlib (archlib.U):
2989 This variable is really the same as archlibexp but may differ on
2990 those systems using AFS. For extra portability, only this variable
2991 should be used in makefiles.
2992
2993installbin (bin.U):
2994 This variable is the same as binexp unless AFS is running in which case
2995 the user is explicitely prompted for it. This variable should always
2996 be used in your makefiles for maximum portability.
2997
2998installman1dir (man1dir.U):
2999 This variable is really the same as man1direxp, unless you are using
3000 AFS in which case it points to the read/write location whereas
3001 man1direxp only points to the read-only access location. For extra
3002 portability, you should only use this variable within your makefiles.
3003
3004installman3dir (man3dir.U):
3005 This variable is really the same as man3direxp, unless you are using
3006 AFS in which case it points to the read/write location whereas
3007 man3direxp only points to the read-only access location. For extra
3008 portability, you should only use this variable within your makefiles.
3009
3010installprefix (installprefix.U):
3011 This variable holds the name of the directory below which
3012 "make install" will install the package. For most users, this
3013 is the same as prefix. However, it is useful for
3014 installing the software into a different (usually temporary)
3015 location after which it can be bundled up and moved somehow
3016 to the final location specified by prefix.
3017
3018installprefixexp (installprefix.U):
3019 This variable holds the full absolute path of installprefix
3020 with all ~-expansion done.
3021
3022installprivlib (privlib.U):
3023 This variable is really the same as privlibexp but may differ on
3024 those systems using AFS. For extra portability, only this variable
3025 should be used in makefiles.
3026
3027installscript (scriptdir.U):
3028 This variable is usually the same as scriptdirexp, unless you are on
3029 a system running AFS, in which case they may differ slightly. You
3030 should always use this variable within your makefiles for portability.
3031
3032installsitearch (sitearch.U):
3033 This variable is really the same as sitearchexp but may differ on
3034 those systems using AFS. For extra portability, only this variable
3035 should be used in makefiles.
3036
0617aed7
JH
3037installsitebin (sitebin.U):
3038 This variable is usually the same as sitebinexp, unless you are on
3039 a system running AFS, in which case they may differ slightly. You
3040 should always use this variable within your makefiles for portability.
3041
781b178c
JH
3042installsitelib (sitelib.U):
3043 This variable is really the same as sitelibexp but may differ on
3044 those systems using AFS. For extra portability, only this variable
3045 should be used in makefiles.
3046
3047installstyle (installstyle.U):
3048 This variable describes the "style" of the perl installation.
3049 This is intended to be useful for tools that need to
3050 manipulate entire perl distributions. Perl itself doesn't use
3051 this to find its libraries -- the library directories are
3052 stored directly in Config.pm. Currently, there are only two
3053 styles: "lib" and "lib/perl5". The default library locations
3054 (e.g. privlib, sitelib) are either $prefix/lib or
3055 $prefix/lib/perl5. The former is useful if $prefix is a
3056 directory dedicated to perl (e.g. /opt/perl), while the latter
3057 is useful if $prefix is shared by many packages, e.g. if
3058 $prefix=/usr/local.
3059 This may later be extended to include other information, so
3060 be careful with pattern-matching on the results.
3061 For compatibility with perl5.005 and earlier, the default
3062 setting is based on whether or not $prefix contains the string
3063 "perl".
3064
3065installusrbinperl (instubperl.U):
3066 This variable tells whether Perl should be installed also as
3067 /usr/bin/perl in addition to
3068 $installbin/perl
3069
526fdc24
MS
3070installvendorarch (vendorarch.U):
3071 This variable is really the same as vendorarchexp but may differ on
3072 those systems using AFS. For extra portability, only this variable
3073 should be used in makefiles.
3074
0617aed7
JH
3075installvendorbin (vendorbin.U):
3076 This variable is really the same as vendorbinexp but may differ on
3077 those systems using AFS. For extra portability, only this variable
3078 should be used in makefiles.
3079
a3635516
JH
3080installvendorlib (vendorlib.U):
3081 This variable is really the same as vendorlibexp but may differ on
3082 those systems using AFS. For extra portability, only this variable
3083 should be used in makefiles.
3084
781b178c
JH
3085intsize (intsize.U):
3086 This variable contains the value of the INTSIZE symbol, which
3087 indicates to the C program how many bytes there are in an int.
3088
4b661809 3089issymlink (issymlink.U):
983dbef6
JH
3090 This variable holds the test command to test for a symbolic link
3091 (if they are supported). Typical values include 'test -h' and
3092 'test -L'.
4b661809 3093
a22e52b9
JH
3094ivdformat (perlxvf.U):
3095 This variable contains the format string used for printing
3096 a Perl IV as a signed decimal integer.
3097
3098ivsize (perlxv.U):
3099 This variable is the size of an IV in bytes.
3100
3101ivtype (perlxv.U):
3102 This variable contains the C type used for Perl's IV.
3103
781b178c
JH
3104known_extensions (Extensions.U):
3105 This variable holds a list of all XS extensions included in
3106 the package.
3107
3108ksh (Loc.U):
3109 This variable is defined but not used by Configure.
3110 The value is a plain '' and is not useful.
3111
781b178c
JH
3112ld (dlsrc.U):
3113 This variable indicates the program to be used to link
3114 libraries for dynamic loading. On some systems, it is 'ld'.
3115 On ELF systems, it should be $cc. Mostly, we'll try to respect
3116 the hint file setting.
3117
3118lddlflags (dlsrc.U):
3119 This variable contains any special flags that might need to be
3120 passed to $ld to create a shared library suitable for dynamic
3121 loading. It is up to the makefile to use it. For hpux, it
3122 should be '-b'. For sunos 4.1, it is empty.
3123
3124ldflags (ccflags.U):
3125 This variable contains any additional C loader flags desired by
3126 the user. It is up to the Makefile to use this.
3127
af960fef
JH
3128ldflags_uselargefiles (uselfs.U):
3129 This variable contains the loader flags needed by large file builds
3130 and added to ldflags by hints files.
3131
781b178c
JH
3132ldlibpthname (libperl.U):
3133 This variable holds the name of the shared library
3134 search path, often LD_LIBRARY_PATH. To get an empty
3135 string, the hints file must set this to 'none'.
3136
3137less (Loc.U):
5bf26616 3138 This variable is used internally by Configure to determine the
781b178c
JH
3139 full pathname (if any) of the less program. After Configure runs,
3140 the value is reset to a plain "less" and is not useful.
3141
3142lib_ext (Unix.U):
3143 This is an old synonym for _a.
3144
3145libc (libc.U):
3146 This variable contains the location of the C library.
3147
3148libperl (libperl.U):
3149 The perl executable is obtained by linking perlmain.c with
3150 libperl, any static extensions (usually just DynaLoader),
3151 and any other libraries needed on this system. libperl
3152 is usually libperl.a, but can also be libperl.so.xxx if
3153 the user wishes to build a perl executable with a shared
3154 library.
3155
3156libpth (libpth.U):
3157 This variable holds the general path (space-separated) used to find
3158 libraries. It is intended to be used by other units.
3159
3160libs (libs.U):
3161 This variable holds the additional libraries we want to use.
9285ede2 3162 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3163
fe749a9f
JH
3164libsdirs (libs.U):
3165 This variable holds the directory names aka dirnames of the libraries
3166 we found and accepted, duplicates are removed.
3167
3168libsfiles (libs.U):
3169 This variable holds the filenames aka basenames of the libraries
3170 we found and accepted.
3171
3172libsfound (libs.U):
3173 This variable holds the full pathnames of the libraries
3174 we found and accepted.
3175
13b3f787
JH
3176libspath (libs.U):
3177 This variable holds the directory names probed for libraries.
3178
781b178c
JH
3179libswanted (Myinit.U):
3180 This variable holds a list of all the libraries we want to
3181 search. The order is chosen to pick up the c library
3182 ahead of ucb or bsd libraries for SVR4.
3183
af960fef
JH
3184libswanted_uselargefiles (uselfs.U):
3185 This variable contains the libraries needed by large file builds
3186 and added to ldflags by hints files. It is a space separated list
3187 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3188 like libswanted..
af960fef 3189
781b178c 3190line (Loc.U):
ff935051
JH
3191 This variable is defined but not used by Configure.
3192 The value is a plain '' and is not useful.
781b178c
JH
3193
3194lint (Loc.U):
3195 This variable is defined but not used by Configure.
3196 The value is a plain '' and is not useful.
3197
3198lkflags (ccflags.U):
3199 This variable contains any additional C partial linker flags desired by
3200 the user. It is up to the Makefile to use this.
3201
3202ln (Loc.U):
5bf26616 3203 This variable is used internally by Configure to determine the
781b178c
JH
3204 full pathname (if any) of the ln program. After Configure runs,
3205 the value is reset to a plain "ln" and is not useful.
3206
3207lns (lns.U):
3208 This variable holds the name of the command to make
3209 symbolic links (if they are supported). It can be used
3210 in the Makefile. It is either 'ln -s' or 'ln'
3211
10bc17b6
JH
3212localtime_r_proto (d_localtime_r.U):
3213 This variable encodes the prototype of localtime_r.
39183afa
JH
3214 It is zero if d_localtime_r is undef, and one of the
3215 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3216 is defined.
10bc17b6 3217
781b178c
JH
3218locincpth (ccflags.U):
3219 This variable contains a list of additional directories to be
3220 searched by the compiler. The appropriate '-I' directives will
3221 be added to ccflags. This is intended to simplify setting
3222 local directories from the Configure command line.
3223 It's not much, but it parallels the loclibpth stuff in libpth.U.
3224
3225loclibpth (libpth.U):
3226 This variable holds the paths (space-separated) used to find local
3227 libraries. It is prepended to libpth, and is intended to be easily
3228 set from the command line.
3229
3230longdblsize (d_longdbl.U):
3231 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3232 indicates to the C program how many bytes there are in a long double,
3233 if this system supports long doubles.
3234
3235longlongsize (d_longlong.U):
3236 This variable contains the value of the LONGLONGSIZE symbol, which
3237 indicates to the C program how many bytes there are in a long long,
3238 if this system supports long long.
3239
3240longsize (intsize.U):
3241 This variable contains the value of the LONGSIZE symbol, which
3242 indicates to the C program how many bytes there are in a long.
3243
3244lp (Loc.U):
3245 This variable is defined but not used by Configure.
3246 The value is a plain '' and is not useful.
3247
3248lpr (Loc.U):
3249 This variable is defined but not used by Configure.
3250 The value is a plain '' and is not useful.
3251
3252ls (Loc.U):
5bf26616 3253 This variable is used internally by Configure to determine the
781b178c
JH
3254 full pathname (if any) of the ls program. After Configure runs,
3255 the value is reset to a plain "ls" and is not useful.
3256
3257lseeksize (lseektype.U):
3258 This variable defines lseektype to be something like off_t, long,
3259 or whatever type is used to declare lseek offset's type in the
3260 kernel (which also appears to be lseek's return type).
3261
3262lseektype (lseektype.U):
3263 This variable defines lseektype to be something like off_t, long,
3264 or whatever type is used to declare lseek offset's type in the
3265 kernel (which also appears to be lseek's return type).
3266
3267mail (Loc.U):
3268 This variable is defined but not used by Configure.
3269 The value is a plain '' and is not useful.
3270
3271mailx (Loc.U):
3272 This variable is defined but not used by Configure.
3273 The value is a plain '' and is not useful.
3274
3275make (Loc.U):
5bf26616 3276 This variable is used internally by Configure to determine the
c532c9d1
JH
3277 full pathname (if any) of the make program. After Configure runs,
3278 the value is reset to a plain "make" and is not useful.
3279
781b178c
JH
3280make_set_make (make.U):
3281 Some versions of 'make' set the variable MAKE. Others do not.
3282 This variable contains the string to be included in Makefile.SH
3283 so that MAKE is set if needed, and not if not needed.
3284 Possible values are:
3285 make_set_make='#' # If your make program handles this for you,
3286 make_set_make="MAKE=$make" # if it doesn't.
3287 I used a comment character so that we can distinguish a
3288 'set' value (from a previous config.sh or Configure '-D' option)
3289 from an uncomputed value.
3290
3291mallocobj (mallocsrc.U):
3292 This variable contains the name of the malloc.o that this package
3293 generates, if that malloc.o is preferred over the system malloc.
3294 Otherwise the value is null. This variable is intended for generating
3295 Makefiles. See mallocsrc.
3296
3297mallocsrc (mallocsrc.U):
3298 This variable contains the name of the malloc.c that comes with
3299 the package, if that malloc.c is preferred over the system malloc.
3300 Otherwise the value is null. This variable is intended for generating
3301 Makefiles.
3302
3303malloctype (mallocsrc.U):
3304 This variable contains the kind of ptr returned by malloc and realloc.
3305
3306man1dir (man1dir.U):
3307 This variable contains the name of the directory in which manual
3308 source pages are to be put. It is the responsibility of the
3309 Makefile.SH to get the value of this into the proper command.
3310 You must be prepared to do the ~name expansion yourself.
3311
3312man1direxp (man1dir.U):
3313 This variable is the same as the man1dir variable, but is filename
3314 expanded at configuration time, for convenient use in makefiles.
3315
3316man1ext (man1dir.U):
3317 This variable contains the extension that the manual page should
3318 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3319 See man1dir.
3320
3321man3dir (man3dir.U):
3322 This variable contains the name of the directory in which manual
3323 source pages are to be put. It is the responsibility of the
3324 Makefile.SH to get the value of this into the proper command.
3325 You must be prepared to do the ~name expansion yourself.
3326
3327man3direxp (man3dir.U):
3328 This variable is the same as the man3dir variable, but is filename
3329 expanded at configuration time, for convenient use in makefiles.
3330
3331man3ext (man3dir.U):
3332 This variable contains the extension that the manual page should
3333 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3334 See man3dir.
3335
ff935051
JH
3336Mcc (Loc.U):
3337 This variable is used internally by Configure to determine the
3338 full pathname (if any) of the Mcc program. After Configure runs,
3339 the value is reset to a plain "Mcc" and is not useful.
3340
781b178c
JH
3341mips_type (usrinc.U):
3342 This variable holds the environment type for the mips system.
3343 Possible values are "BSD 4.3" and "System V".
3344
3345mkdir (Loc.U):
5bf26616 3346 This variable is used internally by Configure to determine the
781b178c
JH
3347 full pathname (if any) of the mkdir program. After Configure runs,
3348 the value is reset to a plain "mkdir" and is not useful.
3349
fe749a9f
JH
3350mmaptype (d_mmap.U):
3351 This symbol contains the type of pointer returned by mmap()
3352 (and simultaneously the type of the first argument).
3353 It can be 'void *' or 'caddr_t'.
3354
781b178c
JH
3355modetype (modetype.U):
3356 This variable defines modetype to be something like mode_t,
3357 int, unsigned short, or whatever type is used to declare file
3358 modes for system calls.
3359
3360more (Loc.U):
5bf26616 3361 This variable is used internally by Configure to determine the
781b178c
JH
3362 full pathname (if any) of the more program. After Configure runs,
3363 the value is reset to a plain "more" and is not useful.
3364
3365multiarch (multiarch.U):
3366 This variable conditionally defines the MULTIARCH symbol
3367 which signifies the presence of multiplatform files.
3368 This is normally set by hints files.
3369
3370mv (Loc.U):
3371 This variable is defined but not used by Configure.
3372 The value is a plain '' and is not useful.
3373
3374myarchname (archname.U):
3375 This variable holds the architecture name computed by Configure in
3376 a previous run. It is not intended to be perused by any user and
3377 should never be set in a hint file.
3378
3379mydomain (myhostname.U):
3380 This variable contains the eventual value of the MYDOMAIN symbol,
3381 which is the domain of the host the program is going to run on.
3382 The domain must be appended to myhostname to form a complete host name.
3383 The dot comes with mydomain, and need not be supplied by the program.
3384
3385myhostname (myhostname.U):
3386 This variable contains the eventual value of the MYHOSTNAME symbol,
3387 which is the name of the host the program is going to run on.
3388 The domain is not kept with hostname, but must be gotten from mydomain.
3389 The dot comes with mydomain, and need not be supplied by the program.
3390
3391myuname (Oldconfig.U):
3392 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3393 pseudo variables assignments in the output are stripped, thank you. The
3394 whole thing is then lower-cased.
3395
3396n (n.U):
3397 This variable contains the '-n' flag if that is what causes the echo
3398 command to suppress newline. Otherwise it is null. Correct usage is
3399 $echo $n "prompt for a question: $c".
3400
2cc61e15
DD
3401need_va_copy (need_va_copy.U):
3402 This symbol, if defined, indicates that the system stores
3403 the variable argument list datatype, va_list, in a format
3404 that cannot be copied by simple assignment, so that some
3405 other means must be used when copying is required.
3406 As such systems vary in their provision (or non-provision)
3407 of copying mechanisms, handy.h defines a platform-
3408 independent macro, Perl_va_copy(src, dst), to do the job.
3409
781b178c
JH
3410netdb_hlen_type (netdbtype.U):
3411 This variable holds the type used for the 2nd argument to
3412 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3413 This is only useful if you have gethostbyaddr(), naturally.
3414
3415netdb_host_type (netdbtype.U):
3416 This variable holds the type used for the 1st argument to
3417 gethostbyaddr(). Usually, this is char * or void *, possibly
3418 with or without a const prefix.
3419 This is only useful if you have gethostbyaddr(), naturally.
3420
3421netdb_name_type (netdbtype.U):
3422 This variable holds the type used for the argument to
3423 gethostbyname(). Usually, this is char * or const char *.
3424 This is only useful if you have gethostbyname(), naturally.
3425
3426netdb_net_type (netdbtype.U):
3427 This variable holds the type used for the 1st argument to
3428 getnetbyaddr(). Usually, this is int or long.
3429 This is only useful if you have getnetbyaddr(), naturally.
3430
3431nm (Loc.U):
5bf26616 3432 This variable is used internally by Configure to determine the
781b178c
JH
3433 full pathname (if any) of the nm program. After Configure runs,
3434 the value is reset to a plain "nm" and is not useful.
3435
3436nm_opt (usenm.U):
3437 This variable holds the options that may be necessary for nm.
3438
3439nm_so_opt (usenm.U):
3440 This variable holds the options that may be necessary for nm
3441 to work on a shared library but that can not be used on an
3442 archive library. Currently, this is only used by Linux, where
3443 nm --dynamic is *required* to get symbols from an ELF library which
3444 has been stripped, but nm --dynamic is *fatal* on an archive library.
3445 Maybe Linux should just always set usenm=false.
3446
3447nonxs_ext (Extensions.U):
3448 This variable holds a list of all non-xs extensions included
3449 in the package. All of them will be built.
3450
3451nroff (Loc.U):
5bf26616 3452 This variable is used internally by Configure to determine the
781b178c
JH
3453 full pathname (if any) of the nroff program. After Configure runs,
3454 the value is reset to a plain "nroff" and is not useful.
3455
2f12987e
JH
3456nv_preserves_uv_bits (perlxv.U):
3457 This variable indicates how many of bits type uvtype
3458 a variable nvtype can preserve.
3459
6b4667fc
A
3460nveformat (perlxvf.U):
3461 This variable contains the format string used for printing
3462 a Perl NV using %e-ish floating point format.
3463
6b356c8e 3464nvEUformat (perlxvf.U):
6b4667fc
A
3465 This variable contains the format string used for printing
3466 a Perl NV using %E-ish floating point format.
3467
3468nvfformat (perlxvf.U):
3469 This variable confains the format string used for printing
3470 a Perl NV using %f-ish floating point format.
3471
6b356c8e 3472nvFUformat (perlxvf.U):
6b4667fc
A
3473 This variable confains the format string used for printing
3474 a Perl NV using %F-ish floating point format.
3475
3476nvgformat (perlxvf.U):
3477 This variable contains the format string used for printing
3478 a Perl NV using %g-ish floating point format.
3479
6b356c8e 3480nvGUformat (perlxvf.U):
6b4667fc
A
3481 This variable contains the format string used for printing
3482 a Perl NV using %G-ish floating point format.
3483
a22e52b9
JH
3484nvsize (perlxv.U):
3485 This variable is the size of an NV in bytes.
3486
3487nvtype (perlxv.U):
3488 This variable contains the C type used for Perl's NV.
3489
781b178c
JH
3490o_nonblock (nblock_io.U):
3491 This variable bears the symbol value to be used during open() or fcntl()
3492 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3493 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3494 but that is only supported by some devices.
3495
3496obj_ext (Unix.U):
3497 This is an old synonym for _o.
3498
3499old_pthread_create_joinable (d_pthrattrj.U):
3500 This variable defines the constant to use for creating joinable
3501 (aka undetached) pthreads. Unused if pthread.h defines
3502 PTHREAD_CREATE_JOINABLE. If used, possible values are
3503 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3504
3505optimize (ccflags.U):
3506 This variable contains any optimizer/debugger flag that should be used.
3507 It is up to the Makefile to use it.
3508
3509orderlib (orderlib.U):
3510 This variable is "true" if the components of libraries must be ordered
3511 (with `lorder $* | tsort`) before placing them in an archive. Set to
3512 "false" if ranlib or ar can generate random libraries.
3513
3514osname (Oldconfig.U):
3515 This variable contains the operating system name (e.g. sunos,
3516 solaris, hpux, etc.). It can be useful later on for setting
3517 defaults. Any spaces are replaced with underscores. It is set
3518 to a null string if we can't figure it out.
3519
3520osvers (Oldconfig.U):
3521 This variable contains the operating system version (e.g.
3522 4.1.3, 5.2, etc.). It is primarily used for helping select
3523 an appropriate hints file, but might be useful elsewhere for
3524 setting defaults. It is set to '' if we can't figure it out.
3525 We try to be flexible about how much of the version number
3526 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3527 same for this package, hints files might just be os_4.0 or
3528 os_4.1, etc., not keeping separate files for each little release.
3529
3b777bb4
GS
3530otherlibdirs (otherlibdirs.U):
3531 This variable contains a colon-separated set of paths for the perl
3532 binary to search for additional library files or modules.
3533 These directories will be tacked to the end of @INC.
3534 Perl will automatically search below each path for version-
3535 and architecture-specific directories. See inc_version_list
3536 for more details.
3537 A value of ' ' means 'none' and is used to preserve this value
3538 for the next run through Configure.
3539
781b178c
JH
3540package (package.U):
3541 This variable contains the name of the package being constructed.
3542 It is primarily intended for the use of later Configure units.
3543
3544pager (pager.U):
3545 This variable contains the name of the preferred pager on the system.
3546 Usual values are (the full pathnames of) more, less, pg, or cat.
3547
3548passcat (nis.U):
3549 This variable contains a command that produces the text of the
3550 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3551 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3552 On some systems, such as os390, there may be no equivalent
3553 command, in which case this variable is unset.
781b178c
JH
3554
3555patchlevel (patchlevel.U):
3556 The patchlevel level of this package.
3557 The value of patchlevel comes from the patchlevel.h file.
ff935051 3558 In a version number such as 5.6.1, this is the "6".
c890dc6c 3559 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3560
3561path_sep (Unix.U):
3562 This is an old synonym for p_ in Head.U, the character
3563 used to separate elements in the command shell search PATH.
3564
c890dc6c
JH
3565perl5 (perl5.U):
3566 This variable contains the full path (if any) to a previously
3567 installed perl5.005 or later suitable for running the script
3568 to determine inc_version_list.
3569
781b178c 3570perl (Loc.U):
c890dc6c
JH
3571 This variable is defined but not used by Configure.
3572 The value is a plain '' and is not useful.
781b178c 3573
a6d26a0d
JH
3574perl_patchlevel (patchlevel.U):
3575 This is the Perl patch level, a numeric change identifier,
3576 as defined by whichever source code maintenance system
3577 is used to maintain the patches; currently Perforce.
3578 It does not correlate with the Perl version numbers or
3579 the maintenance versus development dichotomy except
3580 by also being increasing.
3581
ff935051
JH
3582PERL_REVISION (Oldsyms.U):
3583 In a Perl version number such as 5.6.2, this is the 5.
3584 This value is manually set in patchlevel.h
3585
3586PERL_SUBVERSION (Oldsyms.U):
3587 In a Perl version number such as 5.6.2, this is the 2.
3588 Values greater than 50 represent potentially unstable
3589 development subversions.
3590 This value is manually set in patchlevel.h
3591
3592PERL_VERSION (Oldsyms.U):
3593 In a Perl version number such as 5.6.2, this is the 6.
3594 This value is manually set in patchlevel.h
3595
781b178c
JH
3596perladmin (perladmin.U):
3597 Electronic mail address of the perl5 administrator.
3598
b7a73309
JH
3599perllibs (End.U):
3600 The list of libraries needed by Perl only (any libraries needed
3601 by extensions only will by dropped, if using dynamic loading).
3602
781b178c
JH
3603perlpath (perlpath.U):
3604 This variable contains the eventual value of the PERLPATH symbol,
3605 which contains the name of the perl interpreter to be used in
3606 shell scripts and in the "eval 'exec'" idiom.
3607
3608pg (Loc.U):
5bf26616 3609 This variable is used internally by Configure to determine the
781b178c
JH
3610 full pathname (if any) of the pg program. After Configure runs,
3611 the value is reset to a plain "pg" and is not useful.
3612
3613phostname (myhostname.U):
3614 This variable contains the eventual value of the PHOSTNAME symbol,
3615 which is a command that can be fed to popen() to get the host name.
3616 The program should probably not presume that the domain is or isn't
3617 there already.
3618
3619pidtype (pidtype.U):
3620 This variable defines PIDTYPE to be something like pid_t, int,
3621 ushort, or whatever type is used to declare process ids in the kernel.
3622
3623plibpth (libpth.U):
3624 Holds the private path used by Configure to find out the libraries.
3625 Its value is prepend to libpth. This variable takes care of special
3626 machines, like the mips. Usually, it should be empty.
3627
fe749a9f
JH
3628pm_apiversion (xs_apiversion.U):
3629 This variable contains the version of the oldest perl
3630 compatible with the present perl. (That is, pure perl modules
3631 written for $pm_apiversion will still work for the current
3632 version). perl.c:incpush() and lib/lib.pm will automatically
3633 search in $sitelib for older directories across major versions
3634 back to pm_apiversion. This is only useful if you have a perl
3635 library directory tree structured like the default one. The
3636 versioned site_perl library was introduced in 5.005, so that's
3637 the default setting for this variable. It's hard to imagine
3638 it changing before Perl6. It is included here for symmetry
3639 with xs_apiveprsion -- the searching algorithms will
3640 (presumably) be similar.
3641 See the INSTALL file for how this works.
3642
781b178c
JH
3643pmake (Loc.U):
3644 This variable is defined but not used by Configure.
3645 The value is a plain '' and is not useful.
3646
3647pr (Loc.U):
3648 This variable is defined but not used by Configure.
3649 The value is a plain '' and is not useful.
3650
3651prefix (prefix.U):
3652 This variable holds the name of the directory below which the
3653 user will install the package. Usually, this is /usr/local, and
3654 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3655 man pages in /usr/local/man, etc. It is only used to set defaults
3656 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3657
3658prefixexp (prefix.U):
3659 This variable holds the full absolute path of the directory below
3660 which the user will install the package. Derived from prefix.
3661
3662privlib (privlib.U):
3663 This variable contains the eventual value of the PRIVLIB symbol,
3664 which is the name of the private library for this package. It may
3665 have a ~ on the front. It is up to the makefile to eventually create
3666 this directory while performing installation (with ~ substitution).
3667
3668privlibexp (privlib.U):
3669 This variable is the ~name expanded version of privlib, so that you
3670 may use it directly in Makefiles or shell scripts.
3671
428dc699
JH
3672procselfexe (d_procselfexe.U):
3673 If d_procselfexe is defined, $procselfexe is the filename
3674 of the symbolic link pointing to the absolute pathname of
3675 the executing program.
3676
781b178c
JH
3677prototype (prototype.U):
3678 This variable holds the eventual value of CAN_PROTOTYPE, which
3679 indicates the C compiler can handle funciton prototypes.
3680
3681ptrsize (ptrsize.U):
3682 This variable contains the value of the PTRSIZE symbol, which
3683 indicates to the C program how many bytes there are in a pointer.
3684
e0a10278 3685quadkind (quadtype.U):
0befd8de
JH
3686 This variable, if defined, encodes the type of a quad:
3687 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3688
3689quadtype (quadtype.U):
3690 This variable defines Quad_t to be something like long, int,
3691 long long, int64_t, or whatever type is used for 64-bit integers.
3692
781b178c
JH
3693randbits (randfunc.U):
3694 Indicates how many bits are produced by the function used to
3695 generate normalized random numbers.
3696
3697randfunc (randfunc.U):
3698 Indicates the name of the random number function to use.
3699 Values include drand48, random, and rand. In C programs,
3700 the 'Drand01' macro is defined to generate uniformly distributed
3701 random numbers over the range [0., 1.[ (see drand01 and nrand).
3702
10bc17b6
JH
3703random_r_proto (d_random_r.U):
3704 This variable encodes the prototype of random_r.
39183afa
JH
3705 It is zero if d_random_r is undef, and one of the
3706 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
3707 is defined.
10bc17b6 3708
781b178c
JH
3709randseedtype (randfunc.U):
3710 Indicates the type of the argument of the seedfunc.
3711
3712ranlib (orderlib.U):
3713 This variable is set to the pathname of the ranlib program, if it is
3714 needed to generate random libraries. Set to ":" if ar can generate
3715 random libraries or if random libraries are not supported
3716
3717rd_nodata (nblock_io.U):
3718 This variable holds the return code from read() when no data is
3719 present. It should be -1, but some systems return 0 when O_NDELAY is
3720 used, which is a shame because you cannot make the difference between
209e5c0a 3721 no data and an EOF.. Sigh!
781b178c 3722
10bc17b6
JH
3723readdir64_r_proto (d_readdir64_r.U):
3724 This variable encodes the prototype of readdir64_r.
39183afa
JH
3725 It is zero if d_readdir64_r is undef, and one of the
3726 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
3727 is defined.
10bc17b6
JH
3728
3729readdir_r_proto (d_readdir_r.U):
3730 This variable encodes the prototype of readdir_r.
39183afa
JH
3731 It is zero if d_readdir_r is undef, and one of the
3732 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
3733 is defined.
10bc17b6 3734
c890dc6c
JH
3735revision (patchlevel.U):
3736 The value of revision comes from the patchlevel.h file.
3737 In a version number such as 5.6.1, this is the "5".
3738 In patchlevel.h, this is referred to as "PERL_REVISION".
3739
781b178c 3740rm (Loc.U):
5bf26616 3741 This variable is used internally by Configure to determine the
781b178c
JH
3742 full pathname (if any) of the rm program. After Configure runs,
3743 the value is reset to a plain "rm" and is not useful.
3744
3745rmail (Loc.U):
3746 This variable is defined but not used by Configure.
3747 The value is a plain '' and is not useful.
3748
5440bc8e
JH
3749run (Cross.U):
3750 This variable contains the command used by Configure
3751 to copy and execute a cross-compiled executable in the
3752 target host. Useful and available only during Perl build.
3753 Empty string '' if not cross-compiling.
3754
781b178c
JH
3755runnm (usenm.U):
3756 This variable contains 'true' or 'false' depending whether the
3757 nm extraction should be performed or not, according to the value
3758 of usenm and the flags on the Configure command line.
3759
3760sched_yield (d_pthread_y.U):
3761 This variable defines the way to yield the execution
3762 of the current thread.
3763
3764scriptdir (scriptdir.U):
3765 This variable holds the name of the directory in which the user wants
3766 to put publicly scripts for the package in question. It is either
3767 the same directory as for binaries, or a special one that can be
3768 mounted across different architectures, like /usr/share. Programs
3769 must be prepared to deal with ~name expansion.
3770
3771scriptdirexp (scriptdir.U):
3772 This variable is the same as scriptdir, but is filename expanded
3773 at configuration time, for programs not wanting to bother with it.
3774
3775sed (Loc.U):
5bf26616 3776 This variable is used internally by Configure to determine the
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3777 full pathname (if any) of the sed program. After Configure runs,
3778 the value is reset to a plain "sed" and is not useful.
3779
3780seedfunc (randfunc.U):
3781 Indicates the random number generating seed function.
3782 Values include srand48, srandom, and srand.
3783
3784selectminbits (selectminbits.U):
3785 This variable holds the minimum number of bits operated by select.
3786 That is, if you do select(n, ...), how many bits at least will be
3787 cleared in the masks if some activity is detected. Usually this
3788 is either n or 32*ceil(n/32), especially many little-endians do
3789 the latter. This is only useful if you have select(), naturally.
3790
3791selecttype (selecttype.U):
3792 This variable holds the type used for the 2nd, 3rd, and 4th
3793 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3794 is defined, and 'int *' otherwise. This is only useful if you
3795 have select(), naturally.
3796
3797sendmail (Loc.U):
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3798 This variable is defined but not used by Configure.
3799 The value is a plain '' and is not useful.
781b178c 3800
10bc17b6
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3801setgrent_r_proto (d_setgrent_r.U):
3802 This variable encodes the prototype of setgrent_r.
39183afa
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3803 It is zero if d_setgrent_r is undef, and one of the
3804 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r
3805 is defined.
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3806
3807sethostent_r_proto (d_sethostent_r.U):
3808 This variable encodes the prototype of sethostent_r.
39183afa
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3809 It is zero if d_sethostent_r is undef, and one of the
3810 REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r
3811 is defined.
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3812
3813setlocale_r_proto (d_setlocale_r.U):
3814 This variable encodes the prototype of setlocale_r.
39183afa
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3815 It is zero if d_setlocale_r is undef, and one of the
3816 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r
3817 is defined.
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3818
3819setnetent_r_proto (d_setnetent_r.U):
3820 This variable encodes the prototype of setnetent_r.
39183afa
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3821 It is zero if d_setnetent_r is undef, and one of the
3822 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r
3823 is defined.
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3824
3825setprotoent_r_proto (d_setprotoent_r.U):
3826 This variable encodes the prototype of setprotoent_r.
39183afa
JH
3827 It is zero if d_setprotoent_r is undef, and one of the
3828 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r
3829 is defined.
10bc17b6
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3830
3831setpwent_r_proto (d_setpwent_r.U):
3832 This variable encodes the prototype of setpwent_r.
39183afa
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3833 It is zero if d_setpwent_r is undef, and one of the
3834 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r
3835 is defined.
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3836
3837setservent_r_proto (d_setservent_r.U):
3838 This variable encodes the prototype of setservent_r.
39183afa
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3839 It is zero if d_setservent_r is undef, and one of the
3840 REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r
3841 is defined.
10bc17b6 3842
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3843sh (sh.U):
3844 This variable contains the full pathname of the shell used
3845 on this system to execute Bourne shell scripts. Usually, this will be
3846 /bin/sh, though it's possible that some systems will have /bin/ksh,
3847 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3848 D:/bin/sh.exe.
3849 This unit comes before Options.U, so you can't set sh with a '-D'
3850 option, though you can override this (and startsh)
3851 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3852
3853shar (Loc.U):
3854 This variable is defined but not used by Configure.
3855 The value is a plain '' and is not useful.
3856
3857sharpbang (spitshell.U):
3858 This variable contains the string #! if this system supports that
3859 construct.
3860
3861shmattype (d_shmat.U):
3862 This symbol contains the type of pointer returned by shmat().
3863 It can be 'void *' or 'char *'.
3864
3865shortsize (intsize.U):
3866 This variable contains the value of the SHORTSIZE symbol which
3867 indicates to the C program how many bytes there are in a short.
3868
3869shrpenv (libperl.U):
3870 If the user builds a shared libperl.so, then we need to tell the
3871 'perl' executable where it will be able to find the installed libperl.so.
3872 One way to do this on some systems is to set the environment variable
3873 LD_RUN_PATH to the directory that will be the final location of the
3874 shared libperl.so. The makefile can use this with something like
3875 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3876 Typical values are
3877 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3878 or
3879 shrpenv=''
3880 See the main perl Makefile.SH for actual working usage.
3881 Alternatively, we might be able to use a command line option such
c68a00c0 3882 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
781b178c
JH
3883 $archlibexp/CORE (Linux).
3884
3885shsharp (spitshell.U):
3886 This variable tells further Configure units whether your sh can
3887 handle # comments.
3888
3889sig_count (sig_name.U):
3890 This variable holds a number larger than the largest valid
3891 signal number. This is usually the same as the NSIG macro.
3892
3893sig_name (sig_name.U):
3894 This variable holds the signal names, space separated. The leading
3895 SIG in signal name is removed. A ZERO is prepended to the
3896 list. This is currently not used.
3897
3898sig_name_init (sig_name.U):
3899 This variable holds the signal names, enclosed in double quotes and
3900 separated by commas, suitable for use in the SIG_NAME definition
3901 below. A "ZERO" is prepended to the list, and the list is
3902 terminated with a plain 0. The leading SIG in signal names
3903 is removed. See sig_num.
3904
3905sig_num (sig_name.U):
3906 This variable holds the signal numbers, space separated. A ZERO is
3907 prepended to the list (corresponding to the fake SIGZERO), and
3908 the list is terminated with a 0. Those numbers correspond to
3909 the value of the signal listed in the same place within the
3910 sig_name list.
3911
3912sig_num_init (sig_name.U):
3913 This variable holds the signal numbers, enclosed in double quotes and
3914 separated by commas, suitable for use in the SIG_NUM definition
3915 below. A "ZERO" is prepended to the list, and the list is
3916 terminated with a plain 0.
3917
76d3c696
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3918sig_size (sig_name.U):
3919 This variable contains the number of elements of the sig_name
8966e0c4 3920 and sig_num arrays, excluding the final NULL entry.
76d3c696 3921
781b178c
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3922signal_t (d_voidsig.U):
3923 This variable holds the type of the signal handler (void or int).
3924
3925sitearch (sitearch.U):
3926 This variable contains the eventual value of the SITEARCH symbol,
3927 which is the name of the private library for this package. It may
3928 have a ~ on the front. It is up to the makefile to eventually create
3929 this directory while performing installation (with ~ substitution).
f868067f
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3930 The standard distribution will put nothing in this directory.
3931 After perl has been installed, users may install their own local
3932 architecture-dependent modules in this directory with
3933 MakeMaker Makefile.PL
3934 or equivalent. See INSTALL for details.
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3935
3936sitearchexp (sitearch.U):
3937 This variable is the ~name expanded version of sitearch, so that you
3938 may use it directly in Makefiles or shell scripts.
3939
0617aed7
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3940sitebin (sitebin.U):
3941 This variable holds the name of the directory in which the user wants
3942 to put add-on publicly executable files for the package in question. It
3943 is most often a local directory such as /usr/local/bin. Programs using
3944 this variable must be prepared to deal with ~name substitution.
f868067f
JH
3945 The standard distribution will put nothing in this directory.
3946 After perl has been installed, users may install their own local
3947 executables in this directory with
3948 MakeMaker Makefile.PL
3949 or equivalent. See INSTALL for details.
0617aed7
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3950
3951sitebinexp (sitebin.U):
3952 This is the same as the sitebin variable, but is filename expanded at
3953 configuration time, for use in your makefiles.
3954
781b178c
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3955sitelib (sitelib.U):
3956 This variable contains the eventual value of the SITELIB symbol,
3957 which is the name of the private library for this package. It may
3958 have a ~ on the front. It is up to the makefile to eventually create
3959 this directory while performing installation (with ~ substitution).
f868067f
JH
3960 The standard distribution will put nothing in this directory.
3961 After perl has been installed, users may install their own local
3962 architecture-independent modules in this directory with
3963 MakeMaker Makefile.PL
3964 or equivalent. See INSTALL for details.
781b178c 3965
526fdc24
MS
3966sitelib_stem (sitelib.U):
3967 This variable is $sitelibexp with any trailing version-specific component
3968 removed. The elements in inc_version_list (inc_version_list.U) can
3969 be tacked onto this variable to generate a list of directories to search.
3970
781b178c
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3971sitelibexp (sitelib.U):
3972 This variable is the ~name expanded version of sitelib, so that you
3973 may use it directly in Makefiles or shell scripts.
3974
3975siteprefix (siteprefix.U):
3976 This variable holds the full absolute path of the directory below
3977 which the user will install add-on packages.
f868067f 3978 See INSTALL for usage and examples.
781b178c
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3979
3980siteprefixexp (siteprefix.U):
3981 This variable holds the full absolute path of the directory below
3982 which the user will install add-on packages. Derived from siteprefix.
3983
a13ea748
JH
3984sizesize (sizesize.U):
3985 This variable contains the size of a sizetype in bytes.
3986
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