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Introduction of d_pseudofork
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1
2!!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3This file is built by metaconfig.
4
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5This file contains a description of all the shell variables whose value is
6determined by the Configure script. Variables intended for use in C
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7programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
8generates pod documentation for Config.pm from this file--please try to keep
24412007 9the formatting regular.]
d7418ba7 10
781b178c 11_a (Unix.U):
9285ede2 12 This variable defines the extension used for ordinary library files.
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13 For unix, it is '.a'. The '.' is included. Other possible
14 values include '.lib'.
15
16_exe (Unix.U):
17 This variable defines the extension used for executable files.
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18 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
19 On operating systems which do not require a specific extension
20 for executable files, this variable is empty.
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21
22_o (Unix.U):
23 This variable defines the extension used for object files.
24 For unix, it is '.o'. The '.' is included. Other possible
25 values include '.obj'.
26
27afs (afs.U):
28 This variable is set to 'true' if AFS (Andrew File System) is used
29 on the system, 'false' otherwise. It is possible to override this
30 with a hint value or command line option, but you'd better know
31 what you are doing.
32
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33afsroot (afs.U):
34 This variable is by default set to '/afs'. In the unlikely case
35 this is not the correct root, it is possible to override this with
36 a hint value or command line option. This will be used in subsequent
635aebb7 37 tests for AFSness in the Perl configure and test process.
a6d26a0d 38
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39alignbytes (alignbytes.U):
40 This variable holds the number of bytes required to align a
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41 double-- or a long double when applicable. Usual values are
42 2, 4 and 8. The default is eight, for safety.
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43
44ansi2knr (ansi2knr.U):
635aebb7 45 This variable is set if the user needs to run ansi2knr.
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46 Currently, this is not supported, so we just abort.
47
48aphostname (d_gethname.U):
49 This variable contains the command which can be used to compute the
50 host name. The command is fully qualified by its absolute path, to make
51 it safe when used by a process with super-user privileges.
52
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53api_revision (patchlevel.U):
54 The three variables, api_revision, api_version, and
55 api_subversion, specify the version of the oldest perl binary
56 compatible with the present perl. In a full version string
57 such as '5.6.1', api_revision is the '5'.
58 Prior to 5.5.640, the format was a floating point number,
59 like 5.00563.
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60
61 perl.c:incpush() and lib/lib.pm will automatically search in
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62 $sitelib/.. for older directories back to the limit specified
63 by these api_ variables. This is only useful if you have a
64 perl library directory tree structured like the default one.
65 See INSTALL for how this works. The versioned site_perl
66 directory was introduced in 5.005, so that is the lowest
67 possible value. The version list appropriate for the current
68 system is determined in inc_version_list.U.
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69
70 XXX To do: Since compatibility can depend on compile time
08e5223a 71 options (such as bincompat, longlong, etc.) it should
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72 (perhaps) be set by Configure, but currently it isn't.
73 Currently, we read a hard-wired value from patchlevel.h.
74 Perhaps what we ought to do is take the hard-wired value from
75 patchlevel.h but then modify it if the current Configure
76 options warrant. patchlevel.h then would use an #ifdef guard.
77
78api_subversion (patchlevel.U):
79 The three variables, api_revision, api_version, and
80 api_subversion, specify the version of the oldest perl binary
81 compatible with the present perl. In a full version string
82 such as '5.6.1', api_subversion is the '1'. See api_revision for
83 full details.
84
85api_version (patchlevel.U):
86 The three variables, api_revision, api_version, and
87 api_subversion, specify the version of the oldest perl binary
88 compatible with the present perl. In a full version string
89 such as '5.6.1', api_version is the '6'. See api_revision for
90 full details. As a special case, 5.5.0 is rendered in the
91 old-style as 5.005. (In the 5.005_0x maintenance series,
92 this was the only versioned directory in $sitelib.)
93
94api_versionstring (patchlevel.U):
95 This variable combines api_revision, api_version, and
96 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
97 for use as a directory name. This is filesystem dependent.
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98
99ar (Loc.U):
5bf26616 100 This variable is used internally by Configure to determine the
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101 full pathname (if any) of the ar program. After Configure runs,
102 the value is reset to a plain "ar" and is not useful.
103
104archlib (archlib.U):
105 This variable holds the name of the directory in which the user wants
106 to put architecture-dependent public library files for $package.
107 It is most often a local directory such as /usr/local/lib.
108 Programs using this variable must be prepared to deal
109 with filename expansion.
110
111archlibexp (archlib.U):
112 This variable is the same as the archlib variable, but is
113 filename expanded at configuration time, for convenient use.
114
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115archname (archname.U):
116 This variable is a short name to characterize the current
117 architecture. It is used mainly to construct the default archlib.
118
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119archname64 (use64bits.U):
120 This variable is used for the 64-bitness part of $archname.
121
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122archobjs (Unix.U):
123 This variable defines any additional objects that must be linked
124 in with the program on this architecture. On unix, it is usually
125 empty. It is typically used to include emulations of unix calls
126 or other facilities. For perl on OS/2, for example, this would
127 include os2/os2.obj.
128
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129asctime_r_proto (d_asctime_r.U):
130 This variable encodes the prototype of asctime_r.
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131 It is zero if d_asctime_r is undef, and one of the
132 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
133 is defined.
10bc17b6 134
781b178c 135awk (Loc.U):
5bf26616 136 This variable is used internally by Configure to determine the
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137 full pathname (if any) of the awk program. After Configure runs,
138 the value is reset to a plain "awk" and is not useful.
139
140baserev (baserev.U):
141 The base revision level of this package, from the .package file.
142
143bash (Loc.U):
144 This variable is defined but not used by Configure.
145 The value is a plain '' and is not useful.
146
147bin (bin.U):
148 This variable holds the name of the directory in which the user wants
149 to put publicly executable images for the package in question. It
150 is most often a local directory such as /usr/local/bin. Programs using
151 this variable must be prepared to deal with ~name substitution.
152
153binexp (bin.U):
154 This is the same as the bin variable, but is filename expanded at
155 configuration time, for use in your makefiles.
156
157bison (Loc.U):
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158 This variable is used internally by Configure to determine the
159 full pathname (if any) of the bison program. After Configure runs,
160 the value is reset to a plain "bison" and is not useful.
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161
162byacc (Loc.U):
5bf26616 163 This variable is used internally by Configure to determine the
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164 full pathname (if any) of the byacc program. After Configure runs,
165 the value is reset to a plain "byacc" and is not useful.
166
167byteorder (byteorder.U):
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168 This variable holds the byte order in a UV. In the following,
169 larger digits indicate more significance. The variable byteorder
170 is either 4321 on a big-endian machine, or 1234 on a little-endian,
171 or 87654321 on a Cray ... or 3412 with weird order !
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172
173c (n.U):
174 This variable contains the \c string if that is what causes the echo
175 command to suppress newline. Otherwise it is null. Correct usage is
176 $echo $n "prompt for a question: $c".
177
178castflags (d_castneg.U):
179 This variable contains a flag that precise difficulties the
180 compiler has casting odd floating values to unsigned long:
181 0 = ok
182 1 = couldn't cast < 0
183 2 = couldn't cast >= 0x80000000
184 4 = couldn't cast in argument expression list
185
186cat (Loc.U):
5bf26616 187 This variable is used internally by Configure to determine the
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188 full pathname (if any) of the cat program. After Configure runs,
189 the value is reset to a plain "cat" and is not useful.
190
191cc (cc.U):
192 This variable holds the name of a command to execute a C compiler which
193 can resolve multiple global references that happen to have the same
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194 name. Usual values are 'cc' and 'gcc'.
195 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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196
197cccdlflags (dlsrc.U):
198 This variable contains any special flags that might need to be
199 passed with 'cc -c' to compile modules to be used to create a shared
200 library that will be used for dynamic loading. For hpux, this
201 should be +z. It is up to the makefile to use it.
202
203ccdlflags (dlsrc.U):
204 This variable contains any special flags that might need to be
205 passed to cc to link with a shared library for dynamic loading.
206 It is up to the makefile to use it. For sunos 4.1, it should
207 be empty.
208
209ccflags (ccflags.U):
210 This variable contains any additional C compiler flags desired by
211 the user. It is up to the Makefile to use this.
212
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213ccflags_uselargefiles (uselfs.U):
214 This variable contains the compiler flags needed by large file builds
215 and added to ccflags by hints files.
216
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217ccname (Checkcc.U):
218 This can set either by hints files or by Configure. If using
219 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
220 Some platforms, however, make good use of this by storing the
221 flavor of the C compiler being used here. For example if using
222 the Sun WorkShop suite, ccname will be 'workshop'.
223
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224ccsymbols (Cppsym.U):
225 The variable contains the symbols defined by the C compiler alone.
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226 The symbols defined by cpp or by cc when it calls cpp are not in
227 this list, see cppsymbols and cppccsymbols.
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228 The list is a space-separated list of symbol=value tokens.
229
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230ccversion (Checkcc.U):
231 This can set either by hints files or by Configure. If using
232 a (non-gcc) vendor cc, this variable may contain a version for
233 the compiler.
234
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235cf_by (cf_who.U):
236 Login name of the person who ran the Configure script and answered the
237 questions. This is used to tag both config.sh and config_h.SH.
238
239cf_email (cf_email.U):
240 Electronic mail address of the person who ran Configure. This can be
241 used by units that require the user's e-mail, like MailList.U.
242
243cf_time (cf_who.U):
244 Holds the output of the "date" command when the configuration file was
245 produced. This is used to tag both config.sh and config_h.SH.
246
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247charsize (charsize.U):
248 This variable contains the value of the CHARSIZE symbol, which
249 indicates to the C program how many bytes there are in a character.
250
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251chgrp (Loc.U):
252 This variable is defined but not used by Configure.
253 The value is a plain '' and is not useful.
254
255chmod (Loc.U):
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256 This variable is used internally by Configure to determine the
257 full pathname (if any) of the chmod program. After Configure runs,
258 the value is reset to a plain "chmod" and is not useful.
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259
260chown (Loc.U):
261 This variable is defined but not used by Configure.
262 The value is a plain '' and is not useful.
263
264clocktype (d_times.U):
265 This variable holds the type returned by times(). It can be long,
266 or clock_t on BSD sites (in which case <sys/types.h> should be
267 included).
268
269comm (Loc.U):
5bf26616 270 This variable is used internally by Configure to determine the
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271 full pathname (if any) of the comm program. After Configure runs,
272 the value is reset to a plain "comm" and is not useful.
273
274compress (Loc.U):
275 This variable is defined but not used by Configure.
276 The value is a plain '' and is not useful.
277
278contains (contains.U):
279 This variable holds the command to do a grep with a proper return
280 status. On most sane systems it is simply "grep". On insane systems
281 it is a grep followed by a cat followed by a test. This variable
282 is primarily for the use of other Configure units.
283
284cp (Loc.U):
5bf26616 285 This variable is used internally by Configure to determine the
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286 full pathname (if any) of the cp program. After Configure runs,
287 the value is reset to a plain "cp" and is not useful.
288
289cpio (Loc.U):
290 This variable is defined but not used by Configure.
291 The value is a plain '' and is not useful.
292
293cpp (Loc.U):
5bf26616 294 This variable is used internally by Configure to determine the
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295 full pathname (if any) of the cpp program. After Configure runs,
296 the value is reset to a plain "cpp" and is not useful.
297
298cpp_stuff (cpp_stuff.U):
505656d3 299 This variable contains an identification of the concatenation mechanism
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300 used by the C preprocessor.
301
302cppccsymbols (Cppsym.U):
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303 The variable contains the symbols defined by the C compiler
304 when it calls cpp. The symbols defined by the cc alone or cpp
305 alone are not in this list, see ccsymbols and cppsymbols.
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306 The list is a space-separated list of symbol=value tokens.
307
308cppflags (ccflags.U):
309 This variable holds the flags that will be passed to the C pre-
310 processor. It is up to the Makefile to use it.
311
312cpplast (cppstdin.U):
313 This variable has the same functionality as cppminus, only it applies
314 to cpprun and not cppstdin.
315
316cppminus (cppstdin.U):
317 This variable contains the second part of the string which will invoke
318 the C preprocessor on the standard input and produce to standard
319 output. This variable will have the value "-" if cppstdin needs
320 a minus to specify standard input, otherwise the value is "".
321
322cpprun (cppstdin.U):
323 This variable contains the command which will invoke a C preprocessor
324 on standard input and put the output to stdout. It is guaranteed not
325 to be a wrapper and may be a null string if no preprocessor can be
326 made directly available. This preprocessor might be different from the
327 one used by the C compiler. Don't forget to append cpplast after the
328 preprocessor options.
329
330cppstdin (cppstdin.U):
331 This variable contains the command which will invoke the C
332 preprocessor on standard input and put the output to stdout.
333 It is primarily used by other Configure units that ask about
334 preprocessor symbols.
335
336cppsymbols (Cppsym.U):
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337 The variable contains the symbols defined by the C preprocessor
338 alone. The symbols defined by cc or by cc when it calls cpp are
339 not in this list, see ccsymbols and cppccsymbols.
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340 The list is a space-separated list of symbol=value tokens.
341
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342crypt_r_proto (d_crypt_r.U):
343 This variable encodes the prototype of crypt_r.
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344 It is zero if d_crypt_r is undef, and one of the
345 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
346 is defined.
10bc17b6 347
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348cryptlib (d_crypt.U):
349 This variable holds -lcrypt or the path to a libcrypt.a archive if
350 the crypt() function is not defined in the standard C library. It is
351 up to the Makefile to use this.
352
353csh (Loc.U):
5bf26616 354 This variable is used internally by Configure to determine the
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355 full pathname (if any) of the csh program. After Configure runs,
356 the value is reset to a plain "csh" and is not useful.
357
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358ctermid_r_proto (d_ctermid_r.U):
359 This variable encodes the prototype of ctermid_r.
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360 It is zero if d_ctermid_r is undef, and one of the
361 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
362 is defined.
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363
364ctime_r_proto (d_ctime_r.U):
365 This variable encodes the prototype of ctime_r.
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366 It is zero if d_ctime_r is undef, and one of the
367 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
368 is defined.
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370d__fwalk (d__fwalk.U):
371 This variable conditionally defines HAS__FWALK if _fwalk() is
372 available to apply a function to all the file handles.
373
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374d_access (d_access.U):
375 This variable conditionally defines HAS_ACCESS if the access() system
376 call is available to check for access permissions using real IDs.
377
378d_accessx (d_accessx.U):
379 This variable conditionally defines the HAS_ACCESSX symbol, which
380 indicates to the C program that the accessx() routine is available.
381
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382d_aintl (d_aintl.U):
383 This variable conditionally defines the HAS_AINTL symbol, which
384 indicates to the C program that the aintl() routine is available.
385 If copysignl is also present we can emulate modfl.
386
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387d_alarm (d_alarm.U):
388 This variable conditionally defines the HAS_ALARM symbol, which
389 indicates to the C program that the alarm() routine is available.
390
391d_archlib (archlib.U):
392 This variable conditionally defines ARCHLIB to hold the pathname
393 of architecture-dependent library files for $package. If
394 $archlib is the same as $privlib, then this is set to undef.
395
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396d_asctime_r (d_asctime_r.U):
397 This variable conditionally defines the HAS_ASCTIME_R symbol,
398 which indicates to the C program that the asctime_r()
399 routine is available.
400
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401d_atolf (atolf.U):
402 This variable conditionally defines the HAS_ATOLF symbol, which
403 indicates to the C program that the atolf() routine is available.
404
405d_atoll (atoll.U):
406 This variable conditionally defines the HAS_ATOLL symbol, which
407 indicates to the C program that the atoll() routine is available.
408
df4c34dc 409d_attribute_format (d_attribut.U):
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410 This variable conditionally defines HASATTRIBUTE_FORMAT, which
411 indicates the C compiler can check for printf-like formats.
412
df4c34dc 413d_attribute_malloc (d_attribut.U):
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414 This variable conditionally defines HASATTRIBUTE_MALLOC, which
415 indicates the C compiler can understand functions as having
416 malloc-like semantics.
417
df4c34dc 418d_attribute_nonnull (d_attribut.U):
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419 This variable conditionally defines HASATTRIBUTE_NONNULL, which
420 indicates that the C compiler can know that certain arguments
421 must not be NULL, and will check accordingly at compile time.
422
df4c34dc 423d_attribute_noreturn (d_attribut.U):
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424 This variable conditionally defines HASATTRIBUTE_NORETURN, which
425 indicates that the C compiler can know that certain functions
426 are guaranteed never to return.
427
df4c34dc 428d_attribute_pure (d_attribut.U):
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429 This variable conditionally defines HASATTRIBUTE_PURE, which
430 indicates that the C compiler can know that certain functions
431 are "pure" functions, meaning that they have no side effects, and
432 only rely on function input and/or global data for their results.
433
df4c34dc 434d_attribute_unused (d_attribut.U):
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435 This variable conditionally defines HASATTRIBUTE_UNUSED, which
436 indicates that the C compiler can know that certain variables
437 and arguments may not always be used, and to not throw warnings
438 if they don't get used.
439
df4c34dc 440d_attribute_warn_unused_result (d_attribut.U):
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441 This variable conditionally defines
442 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
443 compiler can know that certain functions have a return values
444 that must not be ignored, such as malloc() or open().
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445
446d_bcmp (d_bcmp.U):
447 This variable conditionally defines the HAS_BCMP symbol if
448 the bcmp() routine is available to compare strings.
449
450d_bcopy (d_bcopy.U):
451 This variable conditionally defines the HAS_BCOPY symbol if
452 the bcopy() routine is available to copy strings.
453
454d_bsd (Guess.U):
455 This symbol conditionally defines the symbol BSD when running on a
456 BSD system.
457
458d_bsdgetpgrp (d_getpgrp.U):
459 This variable conditionally defines USE_BSD_GETPGRP if
460 getpgrp needs one arguments whereas USG one needs none.
461
462d_bsdsetpgrp (d_setpgrp.U):
463 This variable conditionally defines USE_BSD_SETPGRP if
464 setpgrp needs two arguments whereas USG one needs none.
465 See also d_setpgid for a POSIX interface.
466
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467d_builtin_choose_expr (d_builtin.U):
468 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
469 indicates that the compiler supports __builtin_choose_expr(x,y,z).
470 This built-in function is analogous to the "x?y:z" operator in C,
471 except that the expression returned has its type unaltered by
472 promotion rules. Also, the built-in function does not evaluate
473 the expression that was not chosen.
474
475d_builtin_expect (d_builtin.U):
476 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
477 that the compiler supports __builtin_expect(exp,c). You may use
478 __builtin_expect to provide the compiler with branch prediction
479 information.
480
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481d_bzero (d_bzero.U):
482 This variable conditionally defines the HAS_BZERO symbol if
483 the bzero() routine is available to set memory to 0.
484
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485d_c99_variadic_macros (d_c99_variadic.U):
486 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
487 symbol, which indicates to the C program that C99 variadic macros
488 are available.
489
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490d_casti32 (d_casti32.U):
491 This variable conditionally defines CASTI32, which indicates
492 whether the C compiler can cast large floats to 32-bit ints.
493
494d_castneg (d_castneg.U):
495 This variable conditionally defines CASTNEG, which indicates
496 wether the C compiler can cast negative float to unsigned.
497
498d_charvspr (d_vprintf.U):
499 This variable conditionally defines CHARVSPRINTF if this system
500 has vsprintf returning type (char*). The trend seems to be to
501 declare it as "int vsprintf()".
502
503d_chown (d_chown.U):
504 This variable conditionally defines the HAS_CHOWN symbol, which
505 indicates to the C program that the chown() routine is available.
506
507d_chroot (d_chroot.U):
508 This variable conditionally defines the HAS_CHROOT symbol, which
509 indicates to the C program that the chroot() routine is available.
510
511d_chsize (d_chsize.U):
512 This variable conditionally defines the CHSIZE symbol, which
513 indicates to the C program that the chsize() routine is available
514 to truncate files. You might need a -lx to get this routine.
515
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516d_class (d_class.U):
517 This variable conditionally defines the HAS_CLASS symbol, which
518 indicates to the C program that the class() routine is available.
519
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520d_clearenv (d_clearenv.U):
521 This variable conditionally defines the HAS_CLEARENV symbol, which
522 indicates to the C program that the clearenv () routine is available.
523
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524d_closedir (d_closedir.U):
525 This variable conditionally defines HAS_CLOSEDIR if closedir() is
526 available.
527
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528d_cmsghdr_s (d_cmsghdr_s.U):
529 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
530 which indicates that the struct cmsghdr is supported.
531
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532d_const (d_const.U):
533 This variable conditionally defines the HASCONST symbol, which
534 indicates to the C program that this C compiler knows about the
535 const type.
536
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537d_copysignl (d_copysignl.U):
538 This variable conditionally defines the HAS_COPYSIGNL symbol, which
539 indicates to the C program that the copysignl() routine is available.
540 If aintl is also present we can emulate modfl.
541
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542d_cplusplus (d_cplusplus.U):
543 This variable conditionally defines the USE_CPLUSPLUS symbol, which
544 indicates that a C++ compiler was used to compiled Perl and will be
545 used to compile extensions.
546
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547d_crypt (d_crypt.U):
548 This variable conditionally defines the CRYPT symbol, which
549 indicates to the C program that the crypt() routine is available
550 to encrypt passwords and the like.
551
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552d_crypt_r (d_crypt_r.U):
553 This variable conditionally defines the HAS_CRYPT_R symbol,
554 which indicates to the C program that the crypt_r()
555 routine is available.
556
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557d_csh (d_csh.U):
558 This variable conditionally defines the CSH symbol, which
559 indicates to the C program that the C-shell exists.
560
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561d_ctermid (d_ctermid.U):
562 This variable conditionally defines CTERMID if ctermid() is
563 available to generate filename for terminal.
564
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565d_ctermid_r (d_ctermid_r.U):
566 This variable conditionally defines the HAS_CTERMID_R symbol,
567 which indicates to the C program that the ctermid_r()
568 routine is available.
569
570d_ctime_r (d_ctime_r.U):
571 This variable conditionally defines the HAS_CTIME_R symbol,
572 which indicates to the C program that the ctime_r()
573 routine is available.
574
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575d_cuserid (d_cuserid.U):
576 This variable conditionally defines the HAS_CUSERID symbol, which
577 indicates to the C program that the cuserid() routine is available
578 to get character login names.
579
580d_dbl_dig (d_dbl_dig.U):
581 This variable conditionally defines d_dbl_dig if this system's
582 header files provide DBL_DIG, which is the number of significant
583 digits in a double precision number.
584
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585d_dbminitproto (d_dbminitproto.U):
586 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
587 which indicates to the C program that the system provides
588 a prototype for the dbminit() function. Otherwise, it is
589 up to the program to supply one.
590
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591d_difftime (d_difftime.U):
592 This variable conditionally defines the HAS_DIFFTIME symbol, which
593 indicates to the C program that the difftime() routine is available.
594
066e7355 595d_dir_dd_fd (d_dir_dd_fd.U):
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596 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
597 indicates that the DIR directory stream type contains a member
598 variable called dd_fd.
599
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600d_dirfd (d_dirfd.U):
601 This variable conditionally defines the HAS_DIRFD constant,
602 which indicates to the C program that dirfd() is available
603 to return the file descriptor of a directory stream.
604
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605d_dirnamlen (i_dirent.U):
606 This variable conditionally defines DIRNAMLEN, which indicates
607 to the C program that the length of directory entry names is
608 provided by a d_namelen field.
609
610d_dlerror (d_dlerror.U):
611 This variable conditionally defines the HAS_DLERROR symbol, which
612 indicates to the C program that the dlerror() routine is available.
613
614d_dlopen (d_dlopen.U):
615 This variable conditionally defines the HAS_DLOPEN symbol, which
616 indicates to the C program that the dlopen() routine is available.
617
618d_dlsymun (d_dlsymun.U):
619 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
620 indicates that we need to prepend an underscore to the symbol
621 name before calling dlsym().
622
623d_dosuid (d_dosuid.U):
624 This variable conditionally defines the symbol DOSUID, which
625 tells the C program that it should insert setuid emulation code
626 on hosts which have setuid #! scripts disabled.
627
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628d_drand48_r (d_drand48_r.U):
629 This variable conditionally defines the HAS_DRAND48_R symbol,
630 which indicates to the C program that the drand48_r()
631 routine is available.
632
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633d_drand48proto (d_drand48proto.U):
634 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
635 which indicates to the C program that the system provides
636 a prototype for the drand48() function. Otherwise, it is
637 up to the program to supply one.
638
639d_dup2 (d_dup2.U):
640 This variable conditionally defines HAS_DUP2 if dup2() is
641 available to duplicate file descriptors.
642
643d_eaccess (d_eaccess.U):
644 This variable conditionally defines the HAS_EACCESS symbol, which
645 indicates to the C program that the eaccess() routine is available.
646
647d_endgrent (d_endgrent.U):
648 This variable conditionally defines the HAS_ENDGRENT symbol, which
649 indicates to the C program that the endgrent() routine is available
650 for sequential access of the group database.
651
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652d_endgrent_r (d_endgrent_r.U):
653 This variable conditionally defines the HAS_ENDGRENT_R symbol,
654 which indicates to the C program that the endgrent_r()
655 routine is available.
656
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657d_endhent (d_endhent.U):
658 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
659 available to close whatever was being used for host queries.
660
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661d_endhostent_r (d_endhostent_r.U):
662 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
663 which indicates to the C program that the endhostent_r()
664 routine is available.
665
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666d_endnent (d_endnent.U):
667 This variable conditionally defines HAS_ENDNETENT if endnetent() is
668 available to close whatever was being used for network queries.
669
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670d_endnetent_r (d_endnetent_r.U):
671 This variable conditionally defines the HAS_ENDNETENT_R symbol,
672 which indicates to the C program that the endnetent_r()
673 routine is available.
674
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675d_endpent (d_endpent.U):
676 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
677 available to close whatever was being used for protocol queries.
678
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679d_endprotoent_r (d_endprotoent_r.U):
680 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
681 which indicates to the C program that the endprotoent_r()
682 routine is available.
683
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684d_endpwent (d_endpwent.U):
685 This variable conditionally defines the HAS_ENDPWENT symbol, which
686 indicates to the C program that the endpwent() routine is available
687 for sequential access of the passwd database.
688
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689d_endpwent_r (d_endpwent_r.U):
690 This variable conditionally defines the HAS_ENDPWENT_R symbol,
691 which indicates to the C program that the endpwent_r()
692 routine is available.
693
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694d_endsent (d_endsent.U):
695 This variable conditionally defines HAS_ENDSERVENT if endservent() is
696 available to close whatever was being used for service queries.
697
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698d_endservent_r (d_endservent_r.U):
699 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
700 which indicates to the C program that the endservent_r()
701 routine is available.
702
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703d_eofnblk (nblock_io.U):
704 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
705 when reading from a non-blocking I/O source.
706
707d_eunice (Guess.U):
708 This variable conditionally defines the symbols EUNICE and VAX, which
709 alerts the C program that it must deal with ideosyncracies of VMS.
710
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711d_faststdio (d_faststdio.U):
712 This variable conditionally defines the HAS_FAST_STDIO symbol,
713 which indicates to the C program that the "fast stdio" is available
714 to manipulate the stdio buffers directly.
715
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716d_fchdir (d_fchdir.U):
717 This variable conditionally defines the HAS_FCHDIR symbol, which
718 indicates to the C program that the fchdir() routine is available.
719
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720d_fchmod (d_fchmod.U):
721 This variable conditionally defines the HAS_FCHMOD symbol, which
722 indicates to the C program that the fchmod() routine is available
723 to change mode of opened files.
724
725d_fchown (d_fchown.U):
726 This variable conditionally defines the HAS_FCHOWN symbol, which
727 indicates to the C program that the fchown() routine is available
728 to change ownership of opened files.
729
730d_fcntl (d_fcntl.U):
731 This variable conditionally defines the HAS_FCNTL symbol, and indicates
732 whether the fcntl() function exists
733
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AD
734d_fcntl_can_lock (d_fcntl_can_lock.U):
735 This variable conditionally defines the FCNTL_CAN_LOCK symbol
736 and indicates whether file locking with fcntl() works.
737
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738d_fd_macros (d_fd_set.U):
739 This variable contains the eventual value of the HAS_FD_MACROS symbol,
740 which indicates if your C compiler knows about the macros which
741 manipulate an fd_set.
742
743d_fd_set (d_fd_set.U):
744 This variable contains the eventual value of the HAS_FD_SET symbol,
745 which indicates if your C compiler knows about the fd_set typedef.
746
747d_fds_bits (d_fd_set.U):
748 This variable contains the eventual value of the HAS_FDS_BITS symbol,
749 which indicates if your fd_set typedef contains the fds_bits member.
750 If you have an fd_set typedef, but the dweebs who installed it did
751 a half-fast job and neglected to provide the macros to manipulate
752 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
753
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754d_fgetpos (d_fgetpos.U):
755 This variable conditionally defines HAS_FGETPOS if fgetpos() is
756 available to get the file position indicator.
757
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758d_finite (d_finite.U):
759 This variable conditionally defines the HAS_FINITE symbol, which
760 indicates to the C program that the finite() routine is available.
761
762d_finitel (d_finitel.U):
763 This variable conditionally defines the HAS_FINITEL symbol, which
764 indicates to the C program that the finitel() routine is available.
765
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766d_flexfnam (d_flexfnam.U):
767 This variable conditionally defines the FLEXFILENAMES symbol, which
768 indicates that the system supports filenames longer than 14 characters.
769
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770d_flock (d_flock.U):
771 This variable conditionally defines HAS_FLOCK if flock() is
772 available to do file locking.
773
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774d_flockproto (d_flockproto.U):
775 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
776 which indicates to the C program that the system provides
777 a prototype for the flock() function. Otherwise, it is
778 up to the program to supply one.
779
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780d_fork (d_fork.U):
781 This variable conditionally defines the HAS_FORK symbol, which
782 indicates to the C program that the fork() routine is available.
783
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784d_fp_class (d_fp_class.U):
785 This variable conditionally defines the HAS_FP_CLASS symbol, which
786 indicates to the C program that the fp_class() routine is available.
787
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788d_fpathconf (d_pathconf.U):
789 This variable conditionally defines the HAS_FPATHCONF symbol, which
790 indicates to the C program that the pathconf() routine is available
791 to determine file-system related limits and options associated
792 with a given open file descriptor.
793
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794d_fpclass (d_fpclass.U):
795 This variable conditionally defines the HAS_FPCLASS symbol, which
796 indicates to the C program that the fpclass() routine is available.
797
798d_fpclassify (d_fpclassify.U):
799 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
800 indicates to the C program that the fpclassify() routine is available.
801
802d_fpclassl (d_fpclassl.U):
803 This variable conditionally defines the HAS_FPCLASSL symbol, which
804 indicates to the C program that the fpclassl() routine is available.
805
c890dc6c 806d_fpos64_t (d_fpos64_t.U):
ca24dfc6 807 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 808
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809d_frexpl (d_frexpl.U):
810 This variable conditionally defines the HAS_FREXPL symbol, which
811 indicates to the C program that the frexpl() routine is available.
812
ad27e871 813d_fs_data_s (d_fs_data_s.U):
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814 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
815 which indicates that the struct fs_data is supported.
816
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817d_fseeko (d_fseeko.U):
818 This variable conditionally defines the HAS_FSEEKO symbol, which
819 indicates to the C program that the fseeko() routine is available.
820
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821d_fsetpos (d_fsetpos.U):
822 This variable conditionally defines HAS_FSETPOS if fsetpos() is
823 available to set the file position indicator.
824
0545a864 825d_fstatfs (d_fstatfs.U):
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826 This variable conditionally defines the HAS_FSTATFS symbol, which
827 indicates to the C program that the fstatfs() routine is available.
828
829d_fstatvfs (d_statvfs.U):
830 This variable conditionally defines the HAS_FSTATVFS symbol, which
831 indicates to the C program that the fstatvfs() routine is available.
832
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833d_fsync (d_fsync.U):
834 This variable conditionally defines the HAS_FSYNC symbol, which
835 indicates to the C program that the fsync() routine is available.
836
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837d_ftello (d_ftello.U):
838 This variable conditionally defines the HAS_FTELLO symbol, which
839 indicates to the C program that the ftello() routine is available.
840
841d_ftime (d_ftime.U):
842 This variable conditionally defines the HAS_FTIME symbol, which indicates
843 that the ftime() routine exists. The ftime() routine is basically
844 a sub-second accuracy clock.
845
df4c34dc 846d_futimes (d_futimes.U):
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847 This variable conditionally defines the HAS_FUTIMES symbol, which
848 indicates to the C program that the futimes() routine is available.
849
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850d_Gconvert (d_gconvert.U):
851 This variable holds what Gconvert is defined as to convert
852 floating point numbers into strings. By default, Configure
853 sets this macro to use the first of gconvert, gcvt, or sprintf
854 that pass sprintf-%g-like behaviour tests. If perl is using
855 long doubles, the macro uses the first of the following
856 functions that pass Configure's tests: qgcvt, sprintf (if
857 Configure knows how to make sprintf format long doubles--see
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858 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
859 The gconvert_preference and gconvert_ld_preference variables
4d54317a 860 can be used to alter Configure's preferences, for doubles and
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861 long doubles, respectively. If present, they contain a
862 space-separated list of one or more of the above function
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863 names in the order they should be tried.
864
865 d_Gconvert may be set to override Configure with a platform-
866 specific function. If this function expects a double, a
867 different value may need to be set by the uselongdouble.cbu
868 call-back unit so that long doubles can be formatted without
869 loss of precision.
870
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871d_getcwd (d_getcwd.U):
872 This variable conditionally defines the HAS_GETCWD symbol, which
873 indicates to the C program that the getcwd() routine is available
874 to get the current working directory.
875
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876d_getespwnam (d_getespwnam.U):
877 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
878 available to retrieve enchanced (shadow) password entries by name.
879
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880d_getfsstat (d_getfsstat.U):
881 This variable conditionally defines the HAS_GETFSSTAT symbol, which
882 indicates to the C program that the getfsstat() routine is available.
883
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884d_getgrent (d_getgrent.U):
885 This variable conditionally defines the HAS_GETGRENT symbol, which
886 indicates to the C program that the getgrent() routine is available
887 for sequential access of the group database.
888
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889d_getgrent_r (d_getgrent_r.U):
890 This variable conditionally defines the HAS_GETGRENT_R symbol,
891 which indicates to the C program that the getgrent_r()
892 routine is available.
893
894d_getgrgid_r (d_getgrgid_r.U):
895 This variable conditionally defines the HAS_GETGRGID_R symbol,
896 which indicates to the C program that the getgrgid_r()
897 routine is available.
898
899d_getgrnam_r (d_getgrnam_r.U):
900 This variable conditionally defines the HAS_GETGRNAM_R symbol,
901 which indicates to the C program that the getgrnam_r()
902 routine is available.
903
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904d_getgrps (d_getgrps.U):
905 This variable conditionally defines the HAS_GETGROUPS symbol, which
906 indicates to the C program that the getgroups() routine is available
907 to get the list of process groups.
908
909d_gethbyaddr (d_gethbyad.U):
910 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
911 indicates to the C program that the gethostbyaddr() routine is available
912 to look up hosts by their IP addresses.
913
914d_gethbyname (d_gethbynm.U):
915 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
916 indicates to the C program that the gethostbyname() routine is available
917 to look up host names in some data base or other.
918
919d_gethent (d_gethent.U):
920 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
921 available to look up host names in some data base or another.
922
923d_gethname (d_gethname.U):
924 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
925 indicates to the C program that the gethostname() routine may be
926 used to derive the host name.
927
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928d_gethostbyaddr_r (d_gethostbyaddr_r.U):
929 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
930 which indicates to the C program that the gethostbyaddr_r()
931 routine is available.
932
933d_gethostbyname_r (d_gethostbyname_r.U):
934 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
935 which indicates to the C program that the gethostbyname_r()
936 routine is available.
937
938d_gethostent_r (d_gethostent_r.U):
939 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
940 which indicates to the C program that the gethostent_r()
941 routine is available.
942
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943d_gethostprotos (d_gethostprotos.U):
944 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
945 which indicates to the C program that <netdb.h> supplies
635aebb7 946 prototypes for the various gethost*() functions.
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947 See also netdbtype.U for probing for various netdb types.
948
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949d_getitimer (d_getitimer.U):
950 This variable conditionally defines the HAS_GETITIMER symbol, which
951 indicates to the C program that the getitimer() routine is available.
952
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953d_getlogin (d_getlogin.U):
954 This variable conditionally defines the HAS_GETLOGIN symbol, which
955 indicates to the C program that the getlogin() routine is available
956 to get the login name.
957
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958d_getlogin_r (d_getlogin_r.U):
959 This variable conditionally defines the HAS_GETLOGIN_R symbol,
960 which indicates to the C program that the getlogin_r()
961 routine is available.
962
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963d_getmnt (d_getmnt.U):
964 This variable conditionally defines the HAS_GETMNT symbol, which
965 indicates to the C program that the getmnt() routine is available
966 to retrieve one or more mount info blocks by filename.
967
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968d_getmntent (d_getmntent.U):
969 This variable conditionally defines the HAS_GETMNTENT symbol, which
970 indicates to the C program that the getmntent() routine is available
0617aed7 971 to iterate through mounted files to get their mount info.
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972
973d_getnbyaddr (d_getnbyad.U):
974 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
975 indicates to the C program that the getnetbyaddr() routine is available
976 to look up networks by their IP addresses.
977
978d_getnbyname (d_getnbynm.U):
979 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
980 indicates to the C program that the getnetbyname() routine is available
981 to look up networks by their names.
982
983d_getnent (d_getnent.U):
984 This variable conditionally defines HAS_GETNETENT if getnetent() is
985 available to look up network names in some data base or another.
986
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987d_getnetbyaddr_r (d_getnetbyaddr_r.U):
988 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
989 which indicates to the C program that the getnetbyaddr_r()
990 routine is available.
991
992d_getnetbyname_r (d_getnetbyname_r.U):
993 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
994 which indicates to the C program that the getnetbyname_r()
995 routine is available.
996
997d_getnetent_r (d_getnetent_r.U):
998 This variable conditionally defines the HAS_GETNETENT_R symbol,
999 which indicates to the C program that the getnetent_r()
1000 routine is available.
1001
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1002d_getnetprotos (d_getnetprotos.U):
1003 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1004 which indicates to the C program that <netdb.h> supplies
635aebb7 1005 prototypes for the various getnet*() functions.
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1006 See also netdbtype.U for probing for various netdb types.
1007
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1008d_getpagsz (d_getpagsz.U):
1009 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1010 is available to get the system page size.
1011
781b178c 1012d_getpbyname (d_getprotby.U):
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1013 This variable conditionally defines the HAS_GETPROTOBYNAME
1014 symbol, which indicates to the C program that the
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1015 getprotobyname() routine is available to look up protocols
1016 by their name.
1017
1018d_getpbynumber (d_getprotby.U):
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1019 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1020 symbol, which indicates to the C program that the
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1021 getprotobynumber() routine is available to look up protocols
1022 by their number.
1023
1024d_getpent (d_getpent.U):
1025 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1026 available to look up protocols in some data base or another.
1027
1028d_getpgid (d_getpgid.U):
1029 This variable conditionally defines the HAS_GETPGID symbol, which
1030 indicates to the C program that the getpgid(pid) function
1031 is available to get the process group id.
1032
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1033d_getpgrp (d_getpgrp.U):
1034 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1035 available to get the current process group.
1036
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1037d_getpgrp2 (d_getpgrp2.U):
1038 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1039 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1040 is available to get the current process group.
1041
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1042d_getppid (d_getppid.U):
1043 This variable conditionally defines the HAS_GETPPID symbol, which
1044 indicates to the C program that the getppid() routine is available
1045 to get the parent process ID.
1046
1047d_getprior (d_getprior.U):
1048 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1049 is available to get a process's priority.
1050
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1051d_getprotobyname_r (d_getprotobyname_r.U):
1052 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1053 which indicates to the C program that the getprotobyname_r()
1054 routine is available.
1055
1056d_getprotobynumber_r (d_getprotobynumber_r.U):
1057 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1058 which indicates to the C program that the getprotobynumber_r()
1059 routine is available.
1060
1061d_getprotoent_r (d_getprotoent_r.U):
1062 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1063 which indicates to the C program that the getprotoent_r()
1064 routine is available.
1065
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1066d_getprotoprotos (d_getprotoprotos.U):
1067 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1068 which indicates to the C program that <netdb.h> supplies
635aebb7 1069 prototypes for the various getproto*() functions.
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1070 See also netdbtype.U for probing for various netdb types.
1071
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1072d_getprpwnam (d_getprpwnam.U):
1073 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1074 available to retrieve protected (shadow) password entries by name.
1075
781b178c
JH
1076d_getpwent (d_getpwent.U):
1077 This variable conditionally defines the HAS_GETPWENT symbol, which
1078 indicates to the C program that the getpwent() routine is available
1079 for sequential access of the passwd database.
1080
10bc17b6
JH
1081d_getpwent_r (d_getpwent_r.U):
1082 This variable conditionally defines the HAS_GETPWENT_R symbol,
1083 which indicates to the C program that the getpwent_r()
1084 routine is available.
1085
1086d_getpwnam_r (d_getpwnam_r.U):
1087 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1088 which indicates to the C program that the getpwnam_r()
1089 routine is available.
1090
1091d_getpwuid_r (d_getpwuid_r.U):
1092 This variable conditionally defines the HAS_GETPWUID_R symbol,
1093 which indicates to the C program that the getpwuid_r()
1094 routine is available.
1095
781b178c 1096d_getsbyname (d_getsrvby.U):
635aebb7
AL
1097 This variable conditionally defines the HAS_GETSERVBYNAME
1098 symbol, which indicates to the C program that the
781b178c
JH
1099 getservbyname() routine is available to look up services
1100 by their name.
1101
1102d_getsbyport (d_getsrvby.U):
635aebb7
AL
1103 This variable conditionally defines the HAS_GETSERVBYPORT
1104 symbol, which indicates to the C program that the
781b178c
JH
1105 getservbyport() routine is available to look up services
1106 by their port.
1107
1108d_getsent (d_getsent.U):
1109 This variable conditionally defines HAS_GETSERVENT if getservent() is
1110 available to look up network services in some data base or another.
1111
10bc17b6
JH
1112d_getservbyname_r (d_getservbyname_r.U):
1113 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1114 which indicates to the C program that the getservbyname_r()
1115 routine is available.
1116
1117d_getservbyport_r (d_getservbyport_r.U):
1118 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1119 which indicates to the C program that the getservbyport_r()
1120 routine is available.
1121
1122d_getservent_r (d_getservent_r.U):
1123 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1124 which indicates to the C program that the getservent_r()
1125 routine is available.
1126
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1127d_getservprotos (d_getservprotos.U):
1128 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1129 which indicates to the C program that <netdb.h> supplies
635aebb7 1130 prototypes for the various getserv*() functions.
781b178c
JH
1131 See also netdbtype.U for probing for various netdb types.
1132
781b178c
JH
1133d_getspnam (d_getspnam.U):
1134 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1135 available to retrieve SysV shadow password entries by name.
1136
10bc17b6
JH
1137d_getspnam_r (d_getspnam_r.U):
1138 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1139 which indicates to the C program that the getspnam_r()
1140 routine is available.
1141
781b178c
JH
1142d_gettimeod (d_ftime.U):
1143 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1144 indicates that the gettimeofday() system call exists (to obtain a
1145 sub-second accuracy clock). You should probably include <sys/resource.h>.
1146
10bc17b6
JH
1147d_gmtime_r (d_gmtime_r.U):
1148 This variable conditionally defines the HAS_GMTIME_R symbol,
1149 which indicates to the C program that the gmtime_r()
1150 routine is available.
1151
781b178c
JH
1152d_gnulibc (d_gnulibc.U):
1153 Defined if we're dealing with the GNU C Library.
1154
1155d_grpasswd (i_grp.U):
1156 This variable conditionally defines GRPASSWD, which indicates
1157 that struct group in <grp.h> contains gr_passwd.
1158
1159d_hasmntopt (d_hasmntopt.U):
1160 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1161 indicates to the C program that the hasmntopt() routine is available
1162 to query the mount options of file systems.
1163
1164d_htonl (d_htonl.U):
1165 This variable conditionally defines HAS_HTONL if htonl() and its
1166 friends are available to do network order byte swapping.
1167
5c567d7d
JH
1168d_ilogbl (d_ilogbl.U):
1169 This variable conditionally defines the HAS_ILOGBL symbol, which
1170 indicates to the C program that the ilogbl() routine is available.
1171 If scalbnl is also present we can emulate frexpl.
1172
c95d0e17
GA
1173d_inc_version_list (inc_version_list.U):
1174 This variable conditionally defines PERL_INC_VERSION_LIST.
1175 It is set to undef when PERL_INC_VERSION_LIST is empty.
1176
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1177d_index (d_strchr.U):
1178 This variable conditionally defines HAS_INDEX if index() and
1179 rindex() are available for string searching.
1180
1181d_inetaton (d_inetaton.U):
1182 This variable conditionally defines the HAS_INET_ATON symbol, which
1183 indicates to the C program that the inet_aton() function is available
1184 to parse IP address "dotted-quad" strings.
1185
13b3f787 1186d_int64_t (d_int64_t.U):
781b178c
JH
1187 This symbol will be defined if the C compiler supports int64_t.
1188
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JH
1189d_isascii (d_isascii.U):
1190 This variable conditionally defines the HAS_ISASCII constant,
1191 which indicates to the C program that isascii() is available.
1192
758a5d79
JH
1193d_isfinite (d_isfinite.U):
1194 This variable conditionally defines the HAS_ISFINITE symbol, which
1195 indicates to the C program that the isfinite() routine is available.
1196
1197d_isinf (d_isinf.U):
1198 This variable conditionally defines the HAS_ISINF symbol, which
1199 indicates to the C program that the isinf() routine is available.
1200
a3540c92
JH
1201d_isnan (d_isnan.U):
1202 This variable conditionally defines the HAS_ISNAN symbol, which
1203 indicates to the C program that the isnan() routine is available.
1204
1205d_isnanl (d_isnanl.U):
1206 This variable conditionally defines the HAS_ISNANL symbol, which
1207 indicates to the C program that the isnanl() routine is available.
1208
781b178c
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1209d_killpg (d_killpg.U):
1210 This variable conditionally defines the HAS_KILLPG symbol, which
1211 indicates to the C program that the killpg() routine is available
1212 to kill process groups.
1213
1214d_lchown (d_lchown.U):
1215 This variable conditionally defines the HAS_LCHOWN symbol, which
1216 indicates to the C program that the lchown() routine is available
1217 to operate on a symbolic link (instead of following the link).
1218
ca24dfc6
LV
1219d_ldbl_dig (d_ldbl_dig.U):
1220 This variable conditionally defines d_ldbl_dig if this system's
1221 header files provide LDBL_DIG, which is the number of significant
1222 digits in a long double precision number.
1223
df4c34dc
MB
1224d_libm_lib_version (d_libm_lib_version.U):
1225 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1226 which indicates to the C program that math.h defines _LIB_VERSION
1227 being available in libm
1228
781b178c
JH
1229d_link (d_link.U):
1230 This variable conditionally defines HAS_LINK if link() is
1231 available to create hard links.
1232
10bc17b6
JH
1233d_localtime_r (d_localtime_r.U):
1234 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1235 which indicates to the C program that the localtime_r()
1236 routine is available.
1237
f025e94b
MB
1238d_localtime_r_needs_tzset (d_localtime_r.U):
1239 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1240 symbol, which makes us call tzset before localtime_r()
1241
781b178c
JH
1242d_locconv (d_locconv.U):
1243 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1244 available for numeric and monetary formatting conventions.
1245
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JH
1246d_lockf (d_lockf.U):
1247 This variable conditionally defines HAS_LOCKF if lockf() is
1248 available to do file locking.
1249
1250d_longdbl (d_longdbl.U):
635aebb7 1251 This variable conditionally defines HAS_LONG_DOUBLE if
781b178c
JH
1252 the long double type is supported.
1253
1254d_longlong (d_longlong.U):
635aebb7 1255 This variable conditionally defines HAS_LONG_LONG if
781b178c
JH
1256 the long long type is supported.
1257
c890dc6c
JH
1258d_lseekproto (d_lseekproto.U):
1259 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1260 which indicates to the C program that the system provides
1261 a prototype for the lseek() function. Otherwise, it is
1262 up to the program to supply one.
1263
781b178c
JH
1264d_lstat (d_lstat.U):
1265 This variable conditionally defines HAS_LSTAT if lstat() is
1266 available to do file stats on symbolic links.
1267
792d8dab
JH
1268d_madvise (d_madvise.U):
1269 This variable conditionally defines HAS_MADVISE if madvise() is
1270 available to map a file into memory.
1271
df4c34dc
MB
1272d_malloc_good_size (d_malloc_size.U):
1273 This symbol, if defined, indicates that the malloc_good_size
7dd121ae
MB
1274 routine is available for use.
1275
df4c34dc
MB
1276d_malloc_size (d_malloc_size.U):
1277 This symbol, if defined, indicates that the malloc_size
7dd121ae
MB
1278 routine is available for use.
1279
781b178c
JH
1280d_mblen (d_mblen.U):
1281 This variable conditionally defines the HAS_MBLEN symbol, which
1282 indicates to the C program that the mblen() routine is available
1283 to find the number of bytes in a multibye character.
1284
1285d_mbstowcs (d_mbstowcs.U):
1286 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1287 indicates to the C program that the mbstowcs() routine is available
1288 to convert a multibyte string into a wide character string.
1289
1290d_mbtowc (d_mbtowc.U):
1291 This variable conditionally defines the HAS_MBTOWC symbol, which
1292 indicates to the C program that the mbtowc() routine is available
1293 to convert multibyte to a wide character.
1294
1295d_memchr (d_memchr.U):
1296 This variable conditionally defines the HAS_MEMCHR symbol, which
1297 indicates to the C program that the memchr() routine is available
1298 to locate characters within a C string.
1299
1300d_memcmp (d_memcmp.U):
1301 This variable conditionally defines the HAS_MEMCMP symbol, which
1302 indicates to the C program that the memcmp() routine is available
1303 to compare blocks of memory.
1304
1305d_memcpy (d_memcpy.U):
1306 This variable conditionally defines the HAS_MEMCPY symbol, which
1307 indicates to the C program that the memcpy() routine is available
1308 to copy blocks of memory.
1309
1310d_memmove (d_memmove.U):
1311 This variable conditionally defines the HAS_MEMMOVE symbol, which
1312 indicates to the C program that the memmove() routine is available
1313 to copy potentatially overlapping blocks of memory.
1314
1315d_memset (d_memset.U):
1316 This variable conditionally defines the HAS_MEMSET symbol, which
1317 indicates to the C program that the memset() routine is available
1318 to set blocks of memory.
1319
1320d_mkdir (d_mkdir.U):
1321 This variable conditionally defines the HAS_MKDIR symbol, which
1322 indicates to the C program that the mkdir() routine is available
209e5c0a 1323 to create directories..
781b178c 1324
fe749a9f
JH
1325d_mkdtemp (d_mkdtemp.U):
1326 This variable conditionally defines the HAS_MKDTEMP symbol, which
1327 indicates to the C program that the mkdtemp() routine is available
1328 to exclusively create a uniquely named temporary directory.
1329
781b178c
JH
1330d_mkfifo (d_mkfifo.U):
1331 This variable conditionally defines the HAS_MKFIFO symbol, which
1332 indicates to the C program that the mkfifo() routine is available.
1333
fe749a9f
JH
1334d_mkstemp (d_mkstemp.U):
1335 This variable conditionally defines the HAS_MKSTEMP symbol, which
1336 indicates to the C program that the mkstemp() routine is available
1337 to exclusively create and open a uniquely named temporary file.
1338
1339d_mkstemps (d_mkstemps.U):
1340 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1341 indicates to the C program that the mkstemps() routine is available
1342 to exclusively create and open a uniquely named (with a suffix)
1343 temporary file.
1344
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JH
1345d_mktime (d_mktime.U):
1346 This variable conditionally defines the HAS_MKTIME symbol, which
1347 indicates to the C program that the mktime() routine is available.
1348
fe749a9f
JH
1349d_mmap (d_mmap.U):
1350 This variable conditionally defines HAS_MMAP if mmap() is
1351 available to map a file into memory.
1352
a3540c92
JH
1353d_modfl (d_modfl.U):
1354 This variable conditionally defines the HAS_MODFL symbol, which
1355 indicates to the C program that the modfl() routine is available.
1356
e67aeab1
JH
1357d_modfl_pow32_bug (d_modfl.U):
1358 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1359 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1360 For example from 4294967303.150000 one would get 4294967302.000000
1361 and 1.150000. The bug has been seen in certain versions of glibc,
1362 release 2.2.2 is known to be okay.
1363
44b94491
MB
1364d_modflproto (d_modfl.U):
1365 This symbol, if defined, indicates that the system provides
1366 a prototype for the modfl() function. Otherwise, it is up
1367 to the program to supply one. C99 says it should be
1368 long double modfl(long double, long double *);
1369
fe749a9f
JH
1370d_mprotect (d_mprotect.U):
1371 This variable conditionally defines HAS_MPROTECT if mprotect() is
1372 available to modify the access protection of a memory mapped file.
1373
781b178c
JH
1374d_msg (d_msg.U):
1375 This variable conditionally defines the HAS_MSG symbol, which
1376 indicates that the entire msg*(2) library is present.
1377
1378d_msg_ctrunc (d_socket.U):
1379 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1380 which indicates that the MSG_CTRUNC is available. #ifdef is
1381 not enough because it may be an enum, glibc has been known to do this.
1382
1383d_msg_dontroute (d_socket.U):
1384 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1385 which indicates that the MSG_DONTROUTE is available. #ifdef is
1386 not enough because it may be an enum, glibc has been known to do this.
1387
1388d_msg_oob (d_socket.U):
1389 This variable conditionally defines the HAS_MSG_OOB symbol,
1390 which indicates that the MSG_OOB is available. #ifdef is
1391 not enough because it may be an enum, glibc has been known to do this.
1392
1393d_msg_peek (d_socket.U):
1394 This variable conditionally defines the HAS_MSG_PEEK symbol,
1395 which indicates that the MSG_PEEK is available. #ifdef is
1396 not enough because it may be an enum, glibc has been known to do this.
1397
1398d_msg_proxy (d_socket.U):
1399 This variable conditionally defines the HAS_MSG_PROXY symbol,
1400 which indicates that the MSG_PROXY is available. #ifdef is
1401 not enough because it may be an enum, glibc has been known to do this.
1402
1403d_msgctl (d_msgctl.U):
1404 This variable conditionally defines the HAS_MSGCTL symbol, which
1405 indicates to the C program that the msgctl() routine is available.
1406
1407d_msgget (d_msgget.U):
1408 This variable conditionally defines the HAS_MSGGET symbol, which
1409 indicates to the C program that the msgget() routine is available.
1410
4e0554ec
JH
1411d_msghdr_s (d_msghdr_s.U):
1412 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1413 which indicates that the struct msghdr is supported.
1414
781b178c
JH
1415d_msgrcv (d_msgrcv.U):
1416 This variable conditionally defines the HAS_MSGRCV symbol, which
1417 indicates to the C program that the msgrcv() routine is available.
1418
1419d_msgsnd (d_msgsnd.U):
1420 This variable conditionally defines the HAS_MSGSND symbol, which
1421 indicates to the C program that the msgsnd() routine is available.
1422
fe749a9f
JH
1423d_msync (d_msync.U):
1424 This variable conditionally defines HAS_MSYNC if msync() is
1425 available to synchronize a mapped file.
1426
1427d_munmap (d_munmap.U):
1428 This variable conditionally defines HAS_MUNMAP if munmap() is
1429 available to unmap a region mapped by mmap().
1430
781b178c
JH
1431d_mymalloc (mallocsrc.U):
1432 This variable conditionally defines MYMALLOC in case other parts
1433 of the source want to take special action if MYMALLOC is used.
1434 This may include different sorts of profiling or error detection.
1435
781b178c
JH
1436d_nice (d_nice.U):
1437 This variable conditionally defines the HAS_NICE symbol, which
1438 indicates to the C program that the nice() routine is available.
1439
2765b840
JH
1440d_nl_langinfo (d_nl_langinfo.U):
1441 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1442 indicates to the C program that the nl_langinfo() routine is available.
1443
78691af5 1444d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1445 This variable indicates whether a variable of type nvtype
1446 can preserve all the bits a variable of type uvtype.
1447
f607920a
CB
1448d_nv_zero_is_allbits_zero (perlxv.U):
1449 This variable indicates whether a variable of type nvtype
1450 stores 0.0 in memory as all bits zero.
1451
c890dc6c 1452d_off64_t (d_off64_t.U):
781b178c
JH
1453 This symbol will be defined if the C compiler supports off64_t.
1454
781b178c
JH
1455d_old_pthread_create_joinable (d_pthrattrj.U):
1456 This variable conditionally defines pthread_create_joinable.
1457 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1458
1459d_oldpthreads (usethreads.U):
1460 This variable conditionally defines the OLD_PTHREADS_API symbol,
1461 and indicates that Perl should be built to use the old
8c09e4ca 1462 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1463 usethreads is set.
1464
1465d_oldsock (d_socket.U):
1466 This variable conditionally defines the OLDSOCKET symbol, which
1467 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1468
1469d_open3 (d_open3.U):
1470 This variable conditionally defines the HAS_OPEN3 manifest constant,
1471 which indicates to the C program that the 3 argument version of
1472 the open(2) function is available.
1473
781b178c
JH
1474d_pathconf (d_pathconf.U):
1475 This variable conditionally defines the HAS_PATHCONF symbol, which
1476 indicates to the C program that the pathconf() routine is available
1477 to determine file-system related limits and options associated
1478 with a given filename.
1479
1480d_pause (d_pause.U):
1481 This variable conditionally defines the HAS_PAUSE symbol, which
1482 indicates to the C program that the pause() routine is available
1483 to suspend a process until a signal is received.
1484
3b777bb4
GS
1485d_perl_otherlibdirs (otherlibdirs.U):
1486 This variable conditionally defines PERL_OTHERLIBDIRS, which
1487 contains a colon-separated set of paths for the perl binary to
1488 include in @INC. See also otherlibdirs.
1489
781b178c
JH
1490d_phostname (d_gethname.U):
1491 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1492 contains the shell command which, when fed to popen(), may be
1493 used to derive the host name.
1494
1495d_pipe (d_pipe.U):
1496 This variable conditionally defines the HAS_PIPE symbol, which
1497 indicates to the C program that the pipe() routine is available
1498 to create an inter-process channel.
1499
1500d_poll (d_poll.U):
1501 This variable conditionally defines the HAS_POLL symbol, which
1502 indicates to the C program that the poll() routine is available
1503 to poll active file descriptors.
1504
1505d_portable (d_portable.U):
1506 This variable conditionally defines the PORTABLE symbol, which
1507 indicates to the C program that it should not assume that it is
1508 running on the machine it was compiled on.
1509
4d54317a
JH
1510d_PRId64 (quadfio.U):
1511 This variable conditionally defines the PERL_PRId64 symbol, which
1512 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1513
1514d_PRIeldbl (longdblfio.U):
1515 This variable conditionally defines the PERL_PRIfldbl symbol, which
1516 indiciates that stdio has a symbol to print long doubles.
1517
1518d_PRIEUldbl (longdblfio.U):
1519 This variable conditionally defines the PERL_PRIfldbl symbol, which
1520 indiciates that stdio has a symbol to print long doubles.
1521 The 'U' in the name is to separate this from d_PRIeldbl so that even
1522 case-blind systems can see the difference.
1523
1524d_PRIfldbl (longdblfio.U):
1525 This variable conditionally defines the PERL_PRIfldbl symbol, which
1526 indiciates that stdio has a symbol to print long doubles.
1527
1528d_PRIFUldbl (longdblfio.U):
1529 This variable conditionally defines the PERL_PRIfldbl symbol, which
1530 indiciates that stdio has a symbol to print long doubles.
1531 The 'U' in the name is to separate this from d_PRIfldbl so that even
1532 case-blind systems can see the difference.
1533
1534d_PRIgldbl (longdblfio.U):
1535 This variable conditionally defines the PERL_PRIfldbl symbol, which
1536 indiciates that stdio has a symbol to print long doubles.
1537
1538d_PRIGUldbl (longdblfio.U):
1539 This variable conditionally defines the PERL_PRIfldbl symbol, which
1540 indiciates that stdio has a symbol to print long doubles.
1541 The 'U' in the name is to separate this from d_PRIgldbl so that even
1542 case-blind systems can see the difference.
1543
1544d_PRIi64 (quadfio.U):
1545 This variable conditionally defines the PERL_PRIi64 symbol, which
1546 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1547
066e7355 1548d_printf_format_null (d_attribut.U):
dcb594bc
MB
1549 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1550 indicates the C compiler allows printf-like formats to be null.
1551
4d54317a
JH
1552d_PRIo64 (quadfio.U):
1553 This variable conditionally defines the PERL_PRIo64 symbol, which
1554 indiciates that stdio has a symbol to print 64-bit octal numbers.
1555
1556d_PRIu64 (quadfio.U):
1557 This variable conditionally defines the PERL_PRIu64 symbol, which
1558 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1559 numbers.
1560
1561d_PRIx64 (quadfio.U):
1562 This variable conditionally defines the PERL_PRIx64 symbol, which
1563 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1564
1565d_PRIXU64 (quadfio.U):
1566 This variable conditionally defines the PERL_PRIXU64 symbol, which
1567 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1568 The 'U' in the name is to separate this from d_PRIx64 so that even
1569 case-blind systems can see the difference.
1570
428dc699
JH
1571d_procselfexe (d_procselfexe.U):
1572 Defined if $procselfexe is symlink to the absolute
1573 pathname of the executing program.
1574
233e16ce
MB
1575d_pseudofork (d_vfork.U):
1576 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1577 which indicates that an emulation of the fork routine is available.
1578
d6483fcc
JH
1579d_pthread_atfork (d_pthread_atfork.U):
1580 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1581 which indicates to the C program that the pthread_atfork()
1582 routine is available.
1583
505656d3
JH
1584d_pthread_attr_setscope (d_pthread_attr_ss.U):
1585 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1586 pthread_attr_setscope() is available to set the contention scope
1587 attribute of a thread attribute object.
1588
781b178c
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1589d_pthread_yield (d_pthread_y.U):
1590 This variable conditionally defines the HAS_PTHREAD_YIELD
1591 symbol if the pthread_yield routine is available to yield
1592 the execution of the current thread.
1593
1594d_pwage (i_pwd.U):
1595 This variable conditionally defines PWAGE, which indicates
1596 that struct passwd contains pw_age.
1597
1598d_pwchange (i_pwd.U):
1599 This variable conditionally defines PWCHANGE, which indicates
1600 that struct passwd contains pw_change.
1601
1602d_pwclass (i_pwd.U):
1603 This variable conditionally defines PWCLASS, which indicates
1604 that struct passwd contains pw_class.
1605
1606d_pwcomment (i_pwd.U):
1607 This variable conditionally defines PWCOMMENT, which indicates
1608 that struct passwd contains pw_comment.
1609
1610d_pwexpire (i_pwd.U):
1611 This variable conditionally defines PWEXPIRE, which indicates
1612 that struct passwd contains pw_expire.
1613
1614d_pwgecos (i_pwd.U):
1615 This variable conditionally defines PWGECOS, which indicates
1616 that struct passwd contains pw_gecos.
1617
1618d_pwpasswd (i_pwd.U):
1619 This variable conditionally defines PWPASSWD, which indicates
1620 that struct passwd contains pw_passwd.
1621
1622d_pwquota (i_pwd.U):
1623 This variable conditionally defines PWQUOTA, which indicates
1624 that struct passwd contains pw_quota.
1625
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1626d_qgcvt (d_qgcvt.U):
1627 This variable conditionally defines the HAS_QGCVT symbol, which
1628 indicates to the C program that the qgcvt() routine is available.
1629
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1630d_quad (quadtype.U):
1631 This variable, if defined, tells that there's a 64-bit integer type,
1632 quadtype.
1633
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1634d_random_r (d_random_r.U):
1635 This variable conditionally defines the HAS_RANDOM_R symbol,
1636 which indicates to the C program that the random_r()
1637 routine is available.
1638
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1639d_readdir (d_readdir.U):
1640 This variable conditionally defines HAS_READDIR if readdir() is
1641 available to read directory entries.
1642
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1643d_readdir64_r (d_readdir64_r.U):
1644 This variable conditionally defines the HAS_READDIR64_R symbol,
1645 which indicates to the C program that the readdir64_r()
1646 routine is available.
1647
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1648d_readdir_r (d_readdir_r.U):
1649 This variable conditionally defines the HAS_READDIR_R symbol,
1650 which indicates to the C program that the readdir_r()
1651 routine is available.
1652
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1653d_readlink (d_readlink.U):
1654 This variable conditionally defines the HAS_READLINK symbol, which
1655 indicates to the C program that the readlink() routine is available
1656 to read the value of a symbolic link.
1657
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1658d_readv (d_readv.U):
1659 This variable conditionally defines the HAS_READV symbol, which
1660 indicates to the C program that the readv() routine is available.
1661
1662d_recvmsg (d_recvmsg.U):
1663 This variable conditionally defines the HAS_RECVMSG symbol, which
1664 indicates to the C program that the recvmsg() routine is available.
1665
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1666d_rename (d_rename.U):
1667 This variable conditionally defines the HAS_RENAME symbol, which
1668 indicates to the C program that the rename() routine is available
1669 to rename files.
1670
1671d_rewinddir (d_readdir.U):
1672 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1673 available.
1674
1675d_rmdir (d_rmdir.U):
1676 This variable conditionally defines HAS_RMDIR if rmdir() is
1677 available to remove directories.
1678
1679d_safebcpy (d_safebcpy.U):
1680 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1681 the bcopy() routine can do overlapping copies. Normally, you
1682 should probably use memmove().
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1683
1684d_safemcpy (d_safemcpy.U):
1685 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1686 the memcpy() routine can do overlapping copies.
b6cc3bc4 1687 For overlapping copies, memmove() should be used, if available.
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1688
1689d_sanemcmp (d_sanemcmp.U):
1690 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1691 the memcpy() routine is available and can be used to compare relative
1692 magnitudes of chars with their high bits set.
1693
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1694d_sbrkproto (d_sbrkproto.U):
1695 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1696 which indicates to the C program that the system provides
1697 a prototype for the sbrk() function. Otherwise, it is
1698 up to the program to supply one.
1699
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1700d_scalbnl (d_scalbnl.U):
1701 This variable conditionally defines the HAS_SCALBNL symbol, which
1702 indicates to the C program that the scalbnl() routine is available.
1703 If ilogbl is also present we can emulate frexpl.
1704
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1705d_sched_yield (d_pthread_y.U):
1706 This variable conditionally defines the HAS_SCHED_YIELD
1707 symbol if the sched_yield routine is available to yield
1708 the execution of the current thread.
1709
1710d_scm_rights (d_socket.U):
1711 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1712 which indicates that the SCM_RIGHTS is available. #ifdef is
1713 not enough because it may be an enum, glibc has been known to do this.
1714
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1715d_SCNfldbl (longdblfio.U):
1716 This variable conditionally defines the PERL_PRIfldbl symbol, which
1717 indiciates that stdio has a symbol to scan long doubles.
1718
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1719d_seekdir (d_readdir.U):
1720 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1721 available.
1722
1723d_select (d_select.U):
1724 This variable conditionally defines HAS_SELECT if select() is
1725 available to select active file descriptors. A <sys/time.h>
1726 inclusion may be necessary for the timeout field.
1727
1728d_sem (d_sem.U):
1729 This variable conditionally defines the HAS_SEM symbol, which
1730 indicates that the entire sem*(2) library is present.
1731
1732d_semctl (d_semctl.U):
1733 This variable conditionally defines the HAS_SEMCTL symbol, which
1734 indicates to the C program that the semctl() routine is available.
1735
1736d_semctl_semid_ds (d_union_semun.U):
1737 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1738 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1739
1740d_semctl_semun (d_union_semun.U):
1741 This variable conditionally defines USE_SEMCTL_SEMUN, which
1742 indicates that union semun is to be used for semctl IPC_STAT.
1743
1744d_semget (d_semget.U):
1745 This variable conditionally defines the HAS_SEMGET symbol, which
1746 indicates to the C program that the semget() routine is available.
1747
1748d_semop (d_semop.U):
1749 This variable conditionally defines the HAS_SEMOP symbol, which
1750 indicates to the C program that the semop() routine is available.
1751
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1752d_sendmsg (d_sendmsg.U):
1753 This variable conditionally defines the HAS_SENDMSG symbol, which
1754 indicates to the C program that the sendmsg() routine is available.
1755
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1756d_setegid (d_setegid.U):
1757 This variable conditionally defines the HAS_SETEGID symbol, which
1758 indicates to the C program that the setegid() routine is available
1759 to change the effective gid of the current program.
1760
1761d_seteuid (d_seteuid.U):
1762 This variable conditionally defines the HAS_SETEUID symbol, which
1763 indicates to the C program that the seteuid() routine is available
1764 to change the effective uid of the current program.
1765
1766d_setgrent (d_setgrent.U):
1767 This variable conditionally defines the HAS_SETGRENT symbol, which
1768 indicates to the C program that the setgrent() routine is available
1769 for initializing sequential access to the group database.
1770
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1771d_setgrent_r (d_setgrent_r.U):
1772 This variable conditionally defines the HAS_SETGRENT_R symbol,
1773 which indicates to the C program that the setgrent_r()
1774 routine is available.
1775
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1776d_setgrps (d_setgrps.U):
1777 This variable conditionally defines the HAS_SETGROUPS symbol, which
1778 indicates to the C program that the setgroups() routine is available
1779 to set the list of process groups.
1780
1781d_sethent (d_sethent.U):
1782 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1783 available.
1784
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1785d_sethostent_r (d_sethostent_r.U):
1786 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1787 which indicates to the C program that the sethostent_r()
1788 routine is available.
1789
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1790d_setitimer (d_setitimer.U):
1791 This variable conditionally defines the HAS_SETITIMER symbol, which
1792 indicates to the C program that the setitimer() routine is available.
1793
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1794d_setlinebuf (d_setlnbuf.U):
1795 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1796 indicates to the C program that the setlinebuf() routine is available
1797 to change stderr or stdout from block-buffered or unbuffered to a
1798 line-buffered mode.
1799
1800d_setlocale (d_setlocale.U):
1801 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1802 available to handle locale-specific ctype implementations.
1803
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1804d_setlocale_r (d_setlocale_r.U):
1805 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1806 which indicates to the C program that the setlocale_r()
1807 routine is available.
1808
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1809d_setnent (d_setnent.U):
1810 This variable conditionally defines HAS_SETNETENT if setnetent() is
1811 available.
1812
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1813d_setnetent_r (d_setnetent_r.U):
1814 This variable conditionally defines the HAS_SETNETENT_R symbol,
1815 which indicates to the C program that the setnetent_r()
1816 routine is available.
1817
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1818d_setpent (d_setpent.U):
1819 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1820 available.
1821
1822d_setpgid (d_setpgid.U):
1823 This variable conditionally defines the HAS_SETPGID symbol if the
1824 setpgid(pid, gpid) function is available to set process group ID.
1825
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1826d_setpgrp (d_setpgrp.U):
1827 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1828 available to set the current process group.
1829
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1830d_setpgrp2 (d_setpgrp2.U):
1831 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1832 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1833 is available to set the current process group.
1834
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1835d_setprior (d_setprior.U):
1836 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1837 is available to set a process's priority.
1838
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JH
1839d_setproctitle (d_setproctitle.U):
1840 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1841 which indicates to the C program that the setproctitle() routine
1842 is available.
1843
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1844d_setprotoent_r (d_setprotoent_r.U):
1845 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1846 which indicates to the C program that the setprotoent_r()
1847 routine is available.
1848
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1849d_setpwent (d_setpwent.U):
1850 This variable conditionally defines the HAS_SETPWENT symbol, which
1851 indicates to the C program that the setpwent() routine is available
1852 for initializing sequential access to the passwd database.
1853
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1854d_setpwent_r (d_setpwent_r.U):
1855 This variable conditionally defines the HAS_SETPWENT_R symbol,
1856 which indicates to the C program that the setpwent_r()
1857 routine is available.
1858
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1859d_setregid (d_setregid.U):
1860 This variable conditionally defines HAS_SETREGID if setregid() is
1861 available to change the real and effective gid of the current
1862 process.
1863
1864d_setresgid (d_setregid.U):
1865 This variable conditionally defines HAS_SETRESGID if setresgid() is
1866 available to change the real, effective and saved gid of the current
1867 process.
1868
1869d_setresuid (d_setreuid.U):
1870 This variable conditionally defines HAS_SETREUID if setresuid() is
1871 available to change the real, effective and saved uid of the current
1872 process.
1873
1874d_setreuid (d_setreuid.U):
1875 This variable conditionally defines HAS_SETREUID if setreuid() is
1876 available to change the real and effective uid of the current
1877 process.
1878
1879d_setrgid (d_setrgid.U):
1880 This variable conditionally defines the HAS_SETRGID symbol, which
1881 indicates to the C program that the setrgid() routine is available
1882 to change the real gid of the current program.
1883
1884d_setruid (d_setruid.U):
1885 This variable conditionally defines the HAS_SETRUID symbol, which
1886 indicates to the C program that the setruid() routine is available
1887 to change the real uid of the current program.
1888
1889d_setsent (d_setsent.U):
1890 This variable conditionally defines HAS_SETSERVENT if setservent() is
1891 available.
1892
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1893d_setservent_r (d_setservent_r.U):
1894 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1895 which indicates to the C program that the setservent_r()
1896 routine is available.
1897
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1898d_setsid (d_setsid.U):
1899 This variable conditionally defines HAS_SETSID if setsid() is
1900 available to set the process group ID.
1901
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1902d_setvbuf (d_setvbuf.U):
1903 This variable conditionally defines the HAS_SETVBUF symbol, which
1904 indicates to the C program that the setvbuf() routine is available
1905 to change buffering on an open stdio stream.
1906
1907d_sfio (d_sfio.U):
1908 This variable conditionally defines the USE_SFIO symbol,
1909 and indicates whether sfio is available (and should be used).
1910
1911d_shm (d_shm.U):
1912 This variable conditionally defines the HAS_SHM symbol, which
1913 indicates that the entire shm*(2) library is present.
1914
1915d_shmat (d_shmat.U):
1916 This variable conditionally defines the HAS_SHMAT symbol, which
1917 indicates to the C program that the shmat() routine is available.
1918
1919d_shmatprototype (d_shmat.U):
635aebb7 1920 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
781b178c
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1921 symbol, which indicates that sys/shm.h has a prototype for
1922 shmat.
1923
1924d_shmctl (d_shmctl.U):
1925 This variable conditionally defines the HAS_SHMCTL symbol, which
1926 indicates to the C program that the shmctl() routine is available.
1927
1928d_shmdt (d_shmdt.U):
1929 This variable conditionally defines the HAS_SHMDT symbol, which
1930 indicates to the C program that the shmdt() routine is available.
1931
1932d_shmget (d_shmget.U):
1933 This variable conditionally defines the HAS_SHMGET symbol, which
1934 indicates to the C program that the shmget() routine is available.
1935
1936d_sigaction (d_sigaction.U):
1937 This variable conditionally defines the HAS_SIGACTION symbol, which
1938 indicates that the Vr4 sigaction() routine is available.
1939
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1940d_sigprocmask (d_sigprocmask.U):
1941 This variable conditionally defines HAS_SIGPROCMASK
1942 if sigprocmask() is available to examine or change the signal mask
1943 of the calling process.
1944
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1945d_sigsetjmp (d_sigsetjmp.U):
1946 This variable conditionally defines the HAS_SIGSETJMP symbol,
1947 which indicates that the sigsetjmp() routine is available to
1948 call setjmp() and optionally save the process's signal mask.
1949
c95d0e17
GA
1950d_sitearch (sitearch.U):
1951 This variable conditionally defines SITEARCH to hold the pathname
1952 of architecture-dependent library files for $package. If
1953 $sitearch is the same as $archlib, then this is set to undef.
1954
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1955d_snprintf (d_snprintf.U):
1956 This variable conditionally defines the HAS_SNPRINTF symbol, which
1957 indicates to the C program that the snprintf () library function
1958 is available.
1959
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1960d_sockatmark (d_sockatmark.U):
1961 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1962 indicates to the C program that the sockatmark() routine is available.
1963
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1964d_sockatmarkproto (d_sockatmarkproto.U):
1965 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1966 which indicates to the C program that the system provides
1967 a prototype for the sockatmark() function. Otherwise, it is
1968 up to the program to supply one.
1969
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1970d_socket (d_socket.U):
1971 This variable conditionally defines HAS_SOCKET, which indicates
1972 that the BSD socket interface is supported.
1973
13b3f787
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1974d_socklen_t (d_socklen_t.U):
1975 This symbol will be defined if the C compiler supports socklen_t.
1976
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1977d_sockpair (d_socket.U):
1978 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1979 indicates that the BSD socketpair() is supported.
1980
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1981d_socks5_init (d_socks5_init.U):
1982 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1983 indicates to the C program that the socks5_init() routine is available.
1984
df4c34dc 1985d_sprintf_returns_strlen (d_sprintf_len.U):
78821a22
NC
1986 This variable defines whether sprintf returns the length of the string
1987 (as per the ANSI spec). Some C libraries retain compatibility with
1988 pre-ANSI C and return a pointer to the passed in buffer; for these
1989 this variable will be undef.
1990
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1991d_sqrtl (d_sqrtl.U):
1992 This variable conditionally defines the HAS_SQRTL symbol, which
1993 indicates to the C program that the sqrtl() routine is available.
1994
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1995d_srand48_r (d_srand48_r.U):
1996 This variable conditionally defines the HAS_SRAND48_R symbol,
1997 which indicates to the C program that the srand48_r()
1998 routine is available.
1999
2000d_srandom_r (d_srandom_r.U):
2001 This variable conditionally defines the HAS_SRANDOM_R symbol,
2002 which indicates to the C program that the srandom_r()
2003 routine is available.
2004
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2005d_sresgproto (d_sresgproto.U):
2006 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2007 which indicates to the C program that the system provides
2008 a prototype for the setresgid() function. Otherwise, it is
2009 up to the program to supply one.
2010
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2011d_sresuproto (d_sresuproto.U):
2012 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2013 which indicates to the C program that the system provides
2014 a prototype for the setresuid() function. Otherwise, it is
2015 up to the program to supply one.
2016
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2017d_statblks (d_statblks.U):
2018 This variable conditionally defines USE_STAT_BLOCKS
2019 if this system has a stat structure declaring
2020 st_blksize and st_blocks.
2021
ad27e871 2022d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 2023 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
2024 symbol, which indicates to struct statfs from has f_flags member.
2025 This kind of struct statfs is coming from sys/mount.h (BSD),
2026 not from sys/statfs.h (SYSV).
2027
ad27e871 2028d_statfs_s (d_statfs_s.U):
0545a864
JH
2029 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2030 which indicates that the struct statfs is supported.
2031
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2032d_statvfs (d_statvfs.U):
2033 This variable conditionally defines the HAS_STATVFS symbol, which
2034 indicates to the C program that the statvfs() routine is available.
2035
2036d_stdio_cnt_lval (d_stdstdio.U):
2037 This variable conditionally defines STDIO_CNT_LVALUE if the
2038 FILE_cnt macro can be used as an lvalue.
2039
2040d_stdio_ptr_lval (d_stdstdio.U):
2041 This variable conditionally defines STDIO_PTR_LVALUE if the
2042 FILE_ptr macro can be used as an lvalue.
2043
a7ffa9b9
NC
2044d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2045 This symbol is defined if using the FILE_ptr macro as an lvalue
2046 to increase the pointer by n leaves File_cnt(fp) unchanged.
2047
2048d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2049 This symbol is defined if using the FILE_ptr macro as an lvalue
2050 to increase the pointer by n has the side effect of decreasing the
2051 value of File_cnt(fp) by n.
2052
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2053d_stdio_stream_array (stdio_streams.U):
2054 This variable tells whether there is an array holding
2055 the stdio streams.
2056
2057d_stdiobase (d_stdstdio.U):
2058 This variable conditionally defines USE_STDIO_BASE if this system
2059 has a FILE structure declaring a usable _base field (or equivalent)
2060 in stdio.h.
2061
2062d_stdstdio (d_stdstdio.U):
2063 This variable conditionally defines USE_STDIO_PTR if this system
2064 has a FILE structure declaring usable _ptr and _cnt fields (or
2065 equivalent) in stdio.h.
2066
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2067d_strchr (d_strchr.U):
2068 This variable conditionally defines HAS_STRCHR if strchr() and
2069 strrchr() are available for string searching.
2070
2071d_strcoll (d_strcoll.U):
2072 This variable conditionally defines HAS_STRCOLL if strcoll() is
2073 available to compare strings using collating information.
2074
2075d_strctcpy (d_strctcpy.U):
2076 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2077 indicates to the C program that this C compiler knows how to copy
2078 structures.
2079
2080d_strerrm (d_strerror.U):
2081 This variable holds what Strerrr is defined as to translate an error
2082 code condition into an error message string. It could be 'strerror'
2083 or a more complex macro emulating strrror with sys_errlist[], or the
2084 "unknown" string when both strerror and sys_errlist are missing.
2085
2086d_strerror (d_strerror.U):
2087 This variable conditionally defines HAS_STRERROR if strerror() is
2088 available to translate error numbers to strings.
2089
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2090d_strerror_r (d_strerror_r.U):
2091 This variable conditionally defines the HAS_STRERROR_R symbol,
2092 which indicates to the C program that the strerror_r()
2093 routine is available.
2094
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2095d_strftime (d_strftime.U):
2096 This variable conditionally defines the HAS_STRFTIME symbol, which
2097 indicates to the C program that the strftime() routine is available.
2098
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2099d_strlcat (d_strlcat.U):
2100 This variable conditionally defines the HAS_STRLCAT symbol, which
2101 indicates to the C program that the strlcat () routine is available.
2102
2103d_strlcpy (d_strlcpy.U):
2104 This variable conditionally defines the HAS_STRLCPY symbol, which
2105 indicates to the C program that the strlcpy () routine is available.
2106
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2107d_strtod (d_strtod.U):
2108 This variable conditionally defines the HAS_STRTOD symbol, which
2109 indicates to the C program that the strtod() routine is available
2110 to provide better numeric string conversion than atof().
2111
2112d_strtol (d_strtol.U):
2113 This variable conditionally defines the HAS_STRTOL symbol, which
2114 indicates to the C program that the strtol() routine is available
2115 to provide better numeric string conversion than atoi() and friends.
2116
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JH
2117d_strtold (d_strtold.U):
2118 This variable conditionally defines the HAS_STRTOLD symbol, which
2119 indicates to the C program that the strtold() routine is available.
2120
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2121d_strtoll (d_strtoll.U):
2122 This variable conditionally defines the HAS_STRTOLL symbol, which
2123 indicates to the C program that the strtoll() routine is available.
2124
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NC
2125d_strtoq (d_strtoq.U):
2126 This variable conditionally defines the HAS_STRTOQ symbol, which
2127 indicates to the C program that the strtoq() routine is available.
2128
781b178c
JH
2129d_strtoul (d_strtoul.U):
2130 This variable conditionally defines the HAS_STRTOUL symbol, which
2131 indicates to the C program that the strtoul() routine is available
2132 to provide conversion of strings to unsigned long.
2133
ff935051 2134d_strtoull (d_strtoull.U):
11dc3f68
JH
2135 This variable conditionally defines the HAS_STRTOULL symbol, which
2136 indicates to the C program that the strtoull() routine is available.
2137
ff935051
JH
2138d_strtouq (d_strtouq.U):
2139 This variable conditionally defines the HAS_STRTOUQ symbol, which
2140 indicates to the C program that the strtouq() routine is available.
2141
781b178c
JH
2142d_strxfrm (d_strxfrm.U):
2143 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2144 available to transform strings.
2145
2146d_suidsafe (d_dosuid.U):
2147 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2148 if setuid scripts can be secure. This test looks in /dev/fd/.
2149
2150d_symlink (d_symlink.U):
2151 This variable conditionally defines the HAS_SYMLINK symbol, which
2152 indicates to the C program that the symlink() routine is available
2153 to create symbolic links.
2154
2155d_syscall (d_syscall.U):
2156 This variable conditionally defines HAS_SYSCALL if syscall() is
2157 available call arbitrary system calls.
2158
5af95cda
JH
2159d_syscallproto (d_syscallproto.U):
2160 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2161 which indicates to the C program that the system provides
2162 a prototype for the syscall() function. Otherwise, it is
2163 up to the program to supply one.
2164
781b178c
JH
2165d_sysconf (d_sysconf.U):
2166 This variable conditionally defines the HAS_SYSCONF symbol, which
2167 indicates to the C program that the sysconf() routine is available
2168 to determine system related limits and options.
2169
2170d_sysernlst (d_strerror.U):
2171 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2172 is available to translate error numbers to the symbolic name.
2173
2174d_syserrlst (d_strerror.U):
2175 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2176 available to translate error numbers to strings.
2177
2178d_system (d_system.U):
2179 This variable conditionally defines HAS_SYSTEM if system() is
2180 available to issue a shell command.
2181
2182d_tcgetpgrp (d_tcgtpgrp.U):
2183 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2184 indicates to the C program that the tcgetpgrp() routine is available.
2185 to get foreground process group ID.
2186
2187d_tcsetpgrp (d_tcstpgrp.U):
2188 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2189 indicates to the C program that the tcsetpgrp() routine is available
2190 to set foreground process group ID.
2191
781b178c
JH
2192d_telldir (d_readdir.U):
2193 This variable conditionally defines HAS_TELLDIR if telldir() is
2194 available.
2195
2196d_telldirproto (d_telldirproto.U):
2197 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2198 which indicates to the C program that the system provides
2199 a prototype for the telldir() function. Otherwise, it is
2200 up to the program to supply one.
2201
2202d_time (d_time.U):
2203 This variable conditionally defines the HAS_TIME symbol, which indicates
2204 that the time() routine exists. The time() routine is normaly
2205 provided on UNIX systems.
2206
2207d_times (d_times.U):
2208 This variable conditionally defines the HAS_TIMES symbol, which indicates
2209 that the times() routine exists. The times() routine is normaly
2210 provided on UNIX systems. You may have to include <sys/times.h>.
2211
511116db
JH
2212d_tm_tm_gmtoff (i_time.U):
2213 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2214 indicates to the C program that the struct tm has the tm_gmtoff field.
2215
2216d_tm_tm_zone (i_time.U):
2217 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2218 indicates to the C program that the struct tm has the tm_zone field.
2219
10bc17b6
JH
2220d_tmpnam_r (d_tmpnam_r.U):
2221 This variable conditionally defines the HAS_TMPNAM_R symbol,
2222 which indicates to the C program that the tmpnam_r()
2223 routine is available.
2224
781b178c
JH
2225d_truncate (d_truncate.U):
2226 This variable conditionally defines HAS_TRUNCATE if truncate() is
2227 available to truncate files.
2228
10bc17b6
JH
2229d_ttyname_r (d_ttyname_r.U):
2230 This variable conditionally defines the HAS_TTYNAME_R symbol,
2231 which indicates to the C program that the ttyname_r()
2232 routine is available.
2233
781b178c
JH
2234d_tzname (d_tzname.U):
2235 This variable conditionally defines HAS_TZNAME if tzname[] is
2236 available to access timezone names.
2237
4e0554ec
JH
2238d_u32align (d_u32align.U):
2239 This variable tells whether you must access character data
2240 through U32-aligned pointers.
2241
2242d_ualarm (d_ualarm.U):
2243 This variable conditionally defines the HAS_UALARM symbol, which
2244 indicates to the C program that the ualarm() routine is available.
2245
781b178c
JH
2246d_umask (d_umask.U):
2247 This variable conditionally defines the HAS_UMASK symbol, which
2248 indicates to the C program that the umask() routine is available.
2249 to set and get the value of the file creation mask.
2250
2251d_uname (d_gethname.U):
2252 This variable conditionally defines the HAS_UNAME symbol, which
2253 indicates to the C program that the uname() routine may be
2254 used to derive the host name.
2255
2256d_union_semun (d_union_semun.U):
2257 This variable conditionally defines HAS_UNION_SEMUN if the
2258 union semun is defined by including <sys/sem.h>.
2259
758a5d79
JH
2260d_unordered (d_unordered.U):
2261 This variable conditionally defines the HAS_UNORDERED symbol, which
2262 indicates to the C program that the unordered() routine is available.
2263
bdf33aa7
SP
2264d_unsetenv (d_unsetenv.U):
2265 This variable conditionally defines the HAS_UNSETENV symbol, which
2266 indicates to the C program that the unsetenv () routine is available.
2267
4e0554ec
JH
2268d_usleep (d_usleep.U):
2269 This variable conditionally defines HAS_USLEEP if usleep() is
2270 available to do high granularity sleeps.
2271
5af95cda
JH
2272d_usleepproto (d_usleepproto.U):
2273 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2274 which indicates to the C program that the system provides
2275 a prototype for the usleep() function. Otherwise, it is
2276 up to the program to supply one.
2277
0545a864
JH
2278d_ustat (d_ustat.U):
2279 This variable conditionally defines HAS_USTAT if ustat() is
2280 available to query file system statistics by dev_t.
2281
526fdc24
MS
2282d_vendorarch (vendorarch.U):
2283 This variable conditionally defined PERL_VENDORARCH.
2284
0617aed7
JH
2285d_vendorbin (vendorbin.U):
2286 This variable conditionally defines PERL_VENDORBIN.
2287
a3635516
JH
2288d_vendorlib (vendorlib.U):
2289 This variable conditionally defines PERL_VENDORLIB.
2290
10305dfa
JH
2291d_vendorscript (vendorscript.U):
2292 This variable conditionally defines PERL_VENDORSCRIPT.
2293
781b178c
JH
2294d_vfork (d_vfork.U):
2295 This variable conditionally defines the HAS_VFORK symbol, which
2296 indicates the vfork() routine is available.
2297
2298d_void_closedir (d_closedir.U):
2299 This variable conditionally defines VOID_CLOSEDIR if closedir()
2300 does not return a value.
2301
2302d_voidsig (d_voidsig.U):
2303 This variable conditionally defines VOIDSIG if this system
2304 declares "void (*signal(...))()" in signal.h. The old way was to
2305 declare it as "int (*signal(...))()".
2306
2307d_voidtty (i_sysioctl.U):
2308 This variable conditionally defines USE_IOCNOTTY to indicate that the
2309 ioctl() call with TIOCNOTTY should be used to void tty association.
2310 Otherwise (on USG probably), it is enough to close the standard file
2311 decriptors and do a setpgrp().
2312
2313d_volatile (d_volatile.U):
2314 This variable conditionally defines the HASVOLATILE symbol, which
2315 indicates to the C program that this C compiler knows about the
2316 volatile declaration.
2317
2318d_vprintf (d_vprintf.U):
2319 This variable conditionally defines the HAS_VPRINTF symbol, which
2320 indicates to the C program that the vprintf() routine is available
2321 to printf with a pointer to an argument list.
2322
df4c34dc
MB
2323d_vsnprintf (d_snprintf.U):
2324 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2325 indicates to the C program that the vsnprintf () library function
2326 is available.
2327
781b178c
JH
2328d_wait4 (d_wait4.U):
2329 This variable conditionally defines the HAS_WAIT4 symbol, which
2330 indicates the wait4() routine is available.
2331
2332d_waitpid (d_waitpid.U):
2333 This variable conditionally defines HAS_WAITPID if waitpid() is
2334 available to wait for child process.
2335
2336d_wcstombs (d_wcstombs.U):
2337 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2338 indicates to the C program that the wcstombs() routine is available
2339 to convert wide character strings to multibyte strings.
2340
2341d_wctomb (d_wctomb.U):
2342 This variable conditionally defines the HAS_WCTOMB symbol, which
2343 indicates to the C program that the wctomb() routine is available
2344 to convert a wide character to a multibyte.
2345
4e0554ec
JH
2346d_writev (d_writev.U):
2347 This variable conditionally defines the HAS_WRITEV symbol, which
2348 indicates to the C program that the writev() routine is available.
2349
781b178c
JH
2350d_xenix (Guess.U):
2351 This variable conditionally defines the symbol XENIX, which alerts
2352 the C program that it runs under Xenix.
2353
2354date (Loc.U):
5bf26616 2355 This variable is used internally by Configure to determine the
781b178c
JH
2356 full pathname (if any) of the date program. After Configure runs,
2357 the value is reset to a plain "date" and is not useful.
2358
2359db_hashtype (i_db.U):
2360 This variable contains the type of the hash structure element
2361 in the <db.h> header file. In older versions of DB, it was
2362 int, while in newer ones it is u_int32_t.
2363
2364db_prefixtype (i_db.U):
2365 This variable contains the type of the prefix structure element
2366 in the <db.h> header file. In older versions of DB, it was
2367 int, while in newer ones it is size_t.
2368
640374d0
JH
2369db_version_major (i_db.U):
2370 This variable contains the major version number of
2371 Berkeley DB found in the <db.h> header file.
2372
2373db_version_minor (i_db.U):
2374 This variable contains the minor version number of
2375 Berkeley DB found in the <db.h> header file.
2376 For DB version 1 this is always 0.
2377
2378db_version_patch (i_db.U):
2379 This variable contains the patch version number of
2380 Berkeley DB found in the <db.h> header file.
2381 For DB version 1 this is always 0.
2382
781b178c
JH
2383defvoidused (voidflags.U):
2384 This variable contains the default value of the VOIDUSED symbol (15).
2385
2386direntrytype (i_dirent.U):
2387 This symbol is set to 'struct direct' or 'struct dirent' depending on
2388 whether dirent is available or not. You should use this pseudo type to
2389 portably declare your directory entries.
2390
2391dlext (dlext.U):
2392 This variable contains the extension that is to be used for the
2393 dynamically loaded modules that perl generaties.
2394
2395dlsrc (dlsrc.U):
2396 This variable contains the name of the dynamic loading file that
2397 will be used with the package.
2398
2399doublesize (doublesize.U):
2400 This variable contains the value of the DOUBLESIZE symbol, which
2401 indicates to the C program how many bytes there are in a double.
2402
2403drand01 (randfunc.U):
2404 Indicates the macro to be used to generate normalized
2405 random numbers. Uses randfunc, often divided by
2406 (double) (((unsigned long) 1 << randbits)) in order to
2407 normalize the result.
2408 In C programs, the macro 'Drand01' is mapped to drand01.
2409
10bc17b6
JH
2410drand48_r_proto (d_drand48_r.U):
2411 This variable encodes the prototype of drand48_r.
39183afa
JH
2412 It is zero if d_drand48_r is undef, and one of the
2413 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2414 is defined.
10bc17b6 2415
781b178c
JH
2416dynamic_ext (Extensions.U):
2417 This variable holds a list of XS extension files we want to
2418 link dynamically into the package. It is used by Makefile.
2419
2420eagain (nblock_io.U):
2421 This variable bears the symbolic errno code set by read() when no
2422 data is present on the file and non-blocking I/O was enabled (otherwise,
2423 read() blocks naturally).
2424
2425ebcdic (ebcdic.U):
2426 This variable conditionally defines EBCDIC if this
2427 system uses EBCDIC encoding. Among other things, this
2428 means that the character ranges are not contiguous.
2429 See trnl.U
2430
2431echo (Loc.U):
5bf26616 2432 This variable is used internally by Configure to determine the
781b178c
JH
2433 full pathname (if any) of the echo program. After Configure runs,
2434 the value is reset to a plain "echo" and is not useful.
2435
2436egrep (Loc.U):
5bf26616 2437 This variable is used internally by Configure to determine the
781b178c
JH
2438 full pathname (if any) of the egrep program. After Configure runs,
2439 the value is reset to a plain "egrep" and is not useful.
2440
2441emacs (Loc.U):
2442 This variable is defined but not used by Configure.
2443 The value is a plain '' and is not useful.
2444
10bc17b6
JH
2445endgrent_r_proto (d_endgrent_r.U):
2446 This variable encodes the prototype of endgrent_r.
39183afa
JH
2447 It is zero if d_endgrent_r is undef, and one of the
2448 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2449 is defined.
10bc17b6
JH
2450
2451endhostent_r_proto (d_endhostent_r.U):
2452 This variable encodes the prototype of endhostent_r.
39183afa
JH
2453 It is zero if d_endhostent_r is undef, and one of the
2454 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2455 is defined.
10bc17b6
JH
2456
2457endnetent_r_proto (d_endnetent_r.U):
2458 This variable encodes the prototype of endnetent_r.
39183afa
JH
2459 It is zero if d_endnetent_r is undef, and one of the
2460 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2461 is defined.
10bc17b6
JH
2462
2463endprotoent_r_proto (d_endprotoent_r.U):
2464 This variable encodes the prototype of endprotoent_r.
39183afa
JH
2465 It is zero if d_endprotoent_r is undef, and one of the
2466 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2467 is defined.
10bc17b6
JH
2468
2469endpwent_r_proto (d_endpwent_r.U):
2470 This variable encodes the prototype of endpwent_r.
39183afa
JH
2471 It is zero if d_endpwent_r is undef, and one of the
2472 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2473 is defined.
10bc17b6
JH
2474
2475endservent_r_proto (d_endservent_r.U):
2476 This variable encodes the prototype of endservent_r.
39183afa
JH
2477 It is zero if d_endservent_r is undef, and one of the
2478 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2479 is defined.
10bc17b6 2480
781b178c
JH
2481eunicefix (Init.U):
2482 When running under Eunice this variable contains a command which will
2483 convert a shell script to the proper form of text file for it to be
2484 executable by the shell. On other systems it is a no-op.
2485
2486exe_ext (Unix.U):
2487 This is an old synonym for _exe.
2488
2489expr (Loc.U):
5bf26616 2490 This variable is used internally by Configure to determine the
781b178c
JH
2491 full pathname (if any) of the expr program. After Configure runs,
2492 the value is reset to a plain "expr" and is not useful.
2493
2494extensions (Extensions.U):
2495 This variable holds a list of all extension files (both XS and
2496 non-xs linked into the package. It is propagated to Config.pm
635aebb7 2497 and is typically used to test whether a particular extesion
781b178c
JH
2498 is available.
2499
cb7ddd31
JH
2500extras (Extras.U):
2501 This variable holds a list of extra modules to install.
2502
781b178c
JH
2503fflushall (fflushall.U):
2504 This symbol, if defined, tells that to flush
2505 all pending stdio output one must loop through all
2506 the stdio file handles stored in an array and fflush them.
2507 Note that if fflushNULL is defined, fflushall will not
2508 even be probed for and will be left undefined.
2509
4d54317a
JH
2510fflushNULL (fflushall.U):
2511 This symbol, if defined, tells that fflush(NULL) does flush
2512 all pending stdio output.
2513
781b178c 2514find (Loc.U):
ff935051
JH
2515 This variable is defined but not used by Configure.
2516 The value is a plain '' and is not useful.
781b178c
JH
2517
2518firstmakefile (Unix.U):
2519 This variable defines the first file searched by make. On unix,
2520 it is makefile (then Makefile). On case-insensitive systems,
2521 it might be something else. This is only used to deal with
2522 convoluted make depend tricks.
2523
2524flex (Loc.U):
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2527
a22e52b9
JH
2528fpossize (fpossize.U):
2529 This variable contains the size of a fpostype in bytes.
2530
781b178c 2531fpostype (fpostype.U):
635aebb7 2532 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2533 uint, or whatever type is used to declare file positions in libc.
2534
2535freetype (mallocsrc.U):
2536 This variable contains the return type of free(). It is usually
2537 void, but occasionally int.
2538
5440bc8e
JH
2539from (Cross.U):
2540 This variable contains the command used by Configure
2541 to copy files from the target host. Useful and available
2542 only during Perl build.
2543 The string ':' if not cross-compiling.
2544
781b178c
JH
2545full_ar (Loc_ar.U):
2546 This variable contains the full pathname to 'ar', whether or
2547 not the user has specified 'portability'. This is only used
2548 in the Makefile.SH.
2549
2550full_csh (d_csh.U):
2551 This variable contains the full pathname to 'csh', whether or
2552 not the user has specified 'portability'. This is only used
2553 in the compiled C program, and we assume that all systems which
2554 can share this executable will have the same full pathname to
2555 'csh.'
2556
2557full_sed (Loc_sed.U):
2558 This variable contains the full pathname to 'sed', whether or
2559 not the user has specified 'portability'. This is only used
2560 in the compiled C program, and we assume that all systems which
2561 can share this executable will have the same full pathname to
2562 'sed.'
2563
123f32c0
MB
2564gccansipedantic (gccvers.U):
2565 If GNU cc (gcc) is used, this variable will enable (if set) the
2566 -ansi and -pedantic ccflags for building core files (through
2567 cflags script). (See Porting/pumpkin.pod for full description).
2568
af960fef 2569gccosandvers (gccvers.U):
123f32c0
MB
2570 If GNU cc (gcc) is used, this variable holds the operating system
2571 and version used to compile gcc. It is set to '' if not gcc,
af960fef
JH
2572 or if nothing useful can be parsed as the os version.
2573
2574gccversion (gccvers.U):
123f32c0 2575 If GNU cc (gcc) is used, this variable holds '1' or '2' to
781b178c
JH
2576 indicate whether the compiler is version 1 or 2. This is used in
2577 setting some of the default cflags. It is set to '' if not gcc.
2578
10bc17b6
JH
2579getgrent_r_proto (d_getgrent_r.U):
2580 This variable encodes the prototype of getgrent_r.
39183afa
JH
2581 It is zero if d_getgrent_r is undef, and one of the
2582 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2583 is defined.
10bc17b6
JH
2584
2585getgrgid_r_proto (d_getgrgid_r.U):
2586 This variable encodes the prototype of getgrgid_r.
39183afa
JH
2587 It is zero if d_getgrgid_r is undef, and one of the
2588 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2589 is defined.
10bc17b6
JH
2590
2591getgrnam_r_proto (d_getgrnam_r.U):
2592 This variable encodes the prototype of getgrnam_r.
39183afa
JH
2593 It is zero if d_getgrnam_r is undef, and one of the
2594 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2595 is defined.
10bc17b6
JH
2596
2597gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2598 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
2599 It is zero if d_gethostbyaddr_r is undef, and one of the
2600 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2601 is defined.
10bc17b6
JH
2602
2603gethostbyname_r_proto (d_gethostbyname_r.U):
2604 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
2605 It is zero if d_gethostbyname_r is undef, and one of the
2606 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2607 is defined.
10bc17b6
JH
2608
2609gethostent_r_proto (d_gethostent_r.U):
2610 This variable encodes the prototype of gethostent_r.
39183afa
JH
2611 It is zero if d_gethostent_r is undef, and one of the
2612 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2613 is defined.
10bc17b6
JH
2614
2615getlogin_r_proto (d_getlogin_r.U):
2616 This variable encodes the prototype of getlogin_r.
39183afa
JH
2617 It is zero if d_getlogin_r is undef, and one of the
2618 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2619 is defined.
10bc17b6
JH
2620
2621getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2622 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
2623 It is zero if d_getnetbyaddr_r is undef, and one of the
2624 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2625 is defined.
10bc17b6
JH
2626
2627getnetbyname_r_proto (d_getnetbyname_r.U):
2628 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
2629 It is zero if d_getnetbyname_r is undef, and one of the
2630 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2631 is defined.
10bc17b6
JH
2632
2633getnetent_r_proto (d_getnetent_r.U):
2634 This variable encodes the prototype of getnetent_r.
39183afa
JH
2635 It is zero if d_getnetent_r is undef, and one of the
2636 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2637 is defined.
10bc17b6
JH
2638
2639getprotobyname_r_proto (d_getprotobyname_r.U):
2640 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
2641 It is zero if d_getprotobyname_r is undef, and one of the
2642 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2643 is defined.
10bc17b6
JH
2644
2645getprotobynumber_r_proto (d_getprotobynumber_r.U):
2646 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
2647 It is zero if d_getprotobynumber_r is undef, and one of the
2648 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2649 is defined.
10bc17b6
JH
2650
2651getprotoent_r_proto (d_getprotoent_r.U):
2652 This variable encodes the prototype of getprotoent_r.
39183afa
JH
2653 It is zero if d_getprotoent_r is undef, and one of the
2654 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2655 is defined.
10bc17b6
JH
2656
2657getpwent_r_proto (d_getpwent_r.U):
2658 This variable encodes the prototype of getpwent_r.
39183afa
JH
2659 It is zero if d_getpwent_r is undef, and one of the
2660 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2661 is defined.
10bc17b6
JH
2662
2663getpwnam_r_proto (d_getpwnam_r.U):
2664 This variable encodes the prototype of getpwnam_r.
39183afa
JH
2665 It is zero if d_getpwnam_r is undef, and one of the
2666 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2667 is defined.
10bc17b6
JH
2668
2669getpwuid_r_proto (d_getpwuid_r.U):
2670 This variable encodes the prototype of getpwuid_r.
39183afa
JH
2671 It is zero if d_getpwuid_r is undef, and one of the
2672 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2673 is defined.
10bc17b6
JH
2674
2675getservbyname_r_proto (d_getservbyname_r.U):
2676 This variable encodes the prototype of getservbyname_r.
39183afa
JH
2677 It is zero if d_getservbyname_r is undef, and one of the
2678 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2679 is defined.
10bc17b6
JH
2680
2681getservbyport_r_proto (d_getservbyport_r.U):
2682 This variable encodes the prototype of getservbyport_r.
39183afa
JH
2683 It is zero if d_getservbyport_r is undef, and one of the
2684 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2685 is defined.
10bc17b6
JH
2686
2687getservent_r_proto (d_getservent_r.U):
2688 This variable encodes the prototype of getservent_r.
39183afa
JH
2689 It is zero if d_getservent_r is undef, and one of the
2690 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2691 is defined.
10bc17b6
JH
2692
2693getspnam_r_proto (d_getspnam_r.U):
2694 This variable encodes the prototype of getspnam_r.
39183afa
JH
2695 It is zero if d_getspnam_r is undef, and one of the
2696 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2697 is defined.
10bc17b6 2698
a22e52b9
JH
2699gidformat (gidf.U):
2700 This variable contains the format string used for printing a Gid_t.
2701
785fb66b
JH
2702gidsign (gidsign.U):
2703 This variable contains the signedness of a gidtype.
2704 1 for unsigned, -1 for signed.
2705
2706gidsize (gidsize.U):
2707 This variable contains the size of a gidtype in bytes.
2708
781b178c
JH
2709gidtype (gidtype.U):
2710 This variable defines Gid_t to be something like gid_t, int,
2711 ushort, or whatever type is used to declare the return type
2712 of getgid(). Typically, it is the type of group ids in the kernel.
2713
2714glibpth (libpth.U):
2715 This variable holds the general path (space-separated) used to
2716 find libraries. It may contain directories that do not exist on
2717 this platform, libpth is the cleaned-up version.
2718
c68a00c0
JH
2719gmake (Loc.U):
2720 This variable is used internally by Configure to determine the
2721 full pathname (if any) of the gmake program. After Configure runs,
2722 the value is reset to a plain "gmake" and is not useful.
2723
10bc17b6
JH
2724gmtime_r_proto (d_gmtime_r.U):
2725 This variable encodes the prototype of gmtime_r.
39183afa
JH
2726 It is zero if d_gmtime_r is undef, and one of the
2727 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2728 is defined.
10bc17b6 2729
00fac743
JH
2730gnulibc_version (d_gnulibc.U):
2731 This variable contains the version number of the GNU C library.
2732 It is usually something like '2.2.5'. It is a plain '' if this
2733 is not the GNU C library, or if the version is unknown.
2734
781b178c 2735grep (Loc.U):
5bf26616 2736 This variable is used internally by Configure to determine the
781b178c
JH
2737 full pathname (if any) of the grep program. After Configure runs,
2738 the value is reset to a plain "grep" and is not useful.
2739
2740groupcat (nis.U):
2741 This variable contains a command that produces the text of the
2742 /etc/group file. This is normally "cat /etc/group", but can be
2743 "ypcat group" when NIS is used.
aaacdc8b
GS
2744 On some systems, such as os390, there may be no equivalent
2745 command, in which case this variable is unset.
781b178c
JH
2746
2747groupstype (groupstype.U):
635aebb7 2748 This variable defines Groups_t to be something like gid_t, int,
781b178c
JH
2749 ushort, or whatever type is used for the second argument to
2750 getgroups() and setgroups(). Usually, this is the same as
2751 gidtype (gid_t), but sometimes it isn't.
2752
2753gzip (Loc.U):
5bf26616 2754 This variable is used internally by Configure to determine the
781b178c
JH
2755 full pathname (if any) of the gzip program. After Configure runs,
2756 the value is reset to a plain "gzip" and is not useful.
2757
2758h_fcntl (h_fcntl.U):
2759 This is variable gets set in various places to tell i_fcntl that
2760 <fcntl.h> should be included.
2761
2762h_sysfile (h_sysfile.U):
2763 This is variable gets set in various places to tell i_sys_file that
2764 <sys/file.h> should be included.
2765
2766hint (Oldconfig.U):
2767 Gives the type of hints used for previous answers. May be one of
2768 "default", "recommended" or "previous".
2769
2770hostcat (nis.U):
2771 This variable contains a command that produces the text of the
2772 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2773 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2774 On some systems, such as os390, there may be no equivalent
2775 command, in which case this variable is unset.
781b178c 2776
10305dfa
JH
2777html1dir (html1dir.U):
2778 This variable contains the name of the directory in which html
2779 source pages are to be put. This directory is for pages
2780 that describe whole programs, not libraries or modules. It
2781 is intended to correspond roughly to section 1 of the Unix
2782 manuals.
2783
2784html1direxp (html1dir.U):
2785 This variable is the same as the html1dir variable, but is filename
2786 expanded at configuration time, for convenient use in makefiles.
2787
2788html3dir (html3dir.U):
2789 This variable contains the name of the directory in which html
2790 source pages are to be put. This directory is for pages
2791 that describe libraries or modules. It is intended to
2792 correspond roughly to section 3 of the Unix manuals.
2793
2794html3direxp (html3dir.U):
2795 This variable is the same as the html3dir variable, but is filename
2796 expanded at configuration time, for convenient use in makefiles.
2797
a22e52b9
JH
2798i16size (perlxv.U):
2799 This variable is the size of an I16 in bytes.
2800
2801i16type (perlxv.U):
2802 This variable contains the C type used for Perl's I16.
2803
2804i32size (perlxv.U):
2805 This variable is the size of an I32 in bytes.
2806
2807i32type (perlxv.U):
2808 This variable contains the C type used for Perl's I32.
2809
2810i64size (perlxv.U):
2811 This variable is the size of an I64 in bytes.
2812
2813i64type (perlxv.U):
2814 This variable contains the C type used for Perl's I64.
2815
2816i8size (perlxv.U):
2817 This variable is the size of an I8 in bytes.
2818
2819i8type (perlxv.U):
2820 This variable contains the C type used for Perl's I8.
2821
781b178c
JH
2822i_arpainet (i_arpainet.U):
2823 This variable conditionally defines the I_ARPA_INET symbol,
2824 and indicates whether a C program should include <arpa/inet.h>.
2825
2826i_bsdioctl (i_sysioctl.U):
2827 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2828 indicates to the C program that <sys/bsdioctl.h> exists and should
2829 be included.
2830
10bc17b6
JH
2831i_crypt (i_crypt.U):
2832 This variable conditionally defines the I_CRYPT symbol, and indicates
2833 whether a C program should include <crypt.h>.
2834
781b178c
JH
2835i_db (i_db.U):
2836 This variable conditionally defines the I_DB symbol, and indicates
2837 whether a C program may include Berkeley's DB include file <db.h>.
2838
2839i_dbm (i_dbm.U):
2840 This variable conditionally defines the I_DBM symbol, which
2841 indicates to the C program that <dbm.h> exists and should
2842 be included.
2843
2844i_dirent (i_dirent.U):
2845 This variable conditionally defines I_DIRENT, which indicates
2846 to the C program that it should include <dirent.h>.
2847
2848i_dld (i_dld.U):
2849 This variable conditionally defines the I_DLD symbol, which
2850 indicates to the C program that <dld.h> (GNU dynamic loading)
2851 exists and should be included.
2852
2853i_dlfcn (i_dlfcn.U):
2854 This variable conditionally defines the I_DLFCN symbol, which
2855 indicates to the C program that <dlfcn.h> exists and should
2856 be included.
2857
2858i_fcntl (i_fcntl.U):
2859 This variable controls the value of I_FCNTL (which tells
2860 the C program to include <fcntl.h>).
2861
2862i_float (i_float.U):
2863 This variable conditionally defines the I_FLOAT symbol, and indicates
2864 whether a C program may include <float.h> to get symbols like DBL_MAX
2865 or DBL_MIN, i.e. machine dependent floating point values.
2866
758a5d79
JH
2867i_fp (i_fp.U):
2868 This variable conditionally defines the I_FP symbol, and indicates
2869 whether a C program should include <fp.h>.
2870
2871i_fp_class (i_fp_class.U):
2872 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2873 whether a C program should include <fp_class.h>.
2874
781b178c
JH
2875i_gdbm (i_gdbm.U):
2876 This variable conditionally defines the I_GDBM symbol, which
2877 indicates to the C program that <gdbm.h> exists and should
2878 be included.
2879
2880i_grp (i_grp.U):
2881 This variable conditionally defines the I_GRP symbol, and indicates
2882 whether a C program should include <grp.h>.
2883
792d8dab
JH
2884i_ieeefp (i_ieeefp.U):
2885 This variable conditionally defines the I_IEEEFP symbol, and indicates
2886 whether a C program should include <ieeefp.h>.
2887
781b178c
JH
2888i_inttypes (i_inttypes.U):
2889 This variable conditionally defines the I_INTTYPES symbol,
2890 and indicates whether a C program should include <inttypes.h>.
2891
2765b840
JH
2892i_langinfo (i_langinfo.U):
2893 This variable conditionally defines the I_LANGINFO symbol,
2894 and indicates whether a C program should include <langinfo.h>.
2895
af960fef
JH
2896i_libutil (i_libutil.U):
2897 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2898 whether a C program should include <libutil.h>.
2899
781b178c
JH
2900i_limits (i_limits.U):
2901 This variable conditionally defines the I_LIMITS symbol, and indicates
2902 whether a C program may include <limits.h> to get symbols like WORD_BIT
2903 and friends.
2904
2905i_locale (i_locale.U):
2906 This variable conditionally defines the I_LOCALE symbol,
2907 and indicates whether a C program should include <locale.h>.
2908
2909i_machcthr (i_machcthr.U):
2910 This variable conditionally defines the I_MACH_CTHREADS symbol,
2911 and indicates whether a C program should include <mach/cthreads.h>.
2912
2913i_malloc (i_malloc.U):
2914 This variable conditionally defines the I_MALLOC symbol, and indicates
2915 whether a C program should include <malloc.h>.
2916
2917i_math (i_math.U):
2918 This variable conditionally defines the I_MATH symbol, and indicates
2919 whether a C program may include <math.h>.
2920
2921i_memory (i_memory.U):
2922 This variable conditionally defines the I_MEMORY symbol, and indicates
2923 whether a C program should include <memory.h>.
2924
2925i_mntent (i_mntent.U):
2926 This variable conditionally defines the I_MNTENT symbol, and indicates
2927 whether a C program should include <mntent.h>.
2928
2929i_ndbm (i_ndbm.U):
2930 This variable conditionally defines the I_NDBM symbol, which
2931 indicates to the C program that <ndbm.h> exists and should
2932 be included.
2933
2934i_netdb (i_netdb.U):
2935 This variable conditionally defines the I_NETDB symbol, and indicates
2936 whether a C program should include <netdb.h>.
2937
2938i_neterrno (i_neterrno.U):
2939 This variable conditionally defines the I_NET_ERRNO symbol, which
2940 indicates to the C program that <net/errno.h> exists and should
2941 be included.
2942
2943i_netinettcp (i_netinettcp.U):
2944 This variable conditionally defines the I_NETINET_TCP symbol,
2945 and indicates whether a C program should include <netinet/tcp.h>.
2946
2947i_niin (i_niin.U):
2948 This variable conditionally defines I_NETINET_IN, which indicates
2949 to the C program that it should include <netinet/in.h>. Otherwise,
2950 you may try <sys/in.h>.
2951
2952i_poll (i_poll.U):
2953 This variable conditionally defines the I_POLL symbol, and indicates
2954 whether a C program should include <poll.h>.
2955
3813c136
JH
2956i_prot (i_prot.U):
2957 This variable conditionally defines the I_PROT symbol, and indicates
2958 whether a C program should include <prot.h>.
2959
781b178c 2960i_pthread (i_pthread.U):
190b66db 2961 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2962 and indicates whether a C program should include <pthread.h>.
2963
2964i_pwd (i_pwd.U):
2965 This variable conditionally defines I_PWD, which indicates
2966 to the C program that it should include <pwd.h>.
2967
2968i_rpcsvcdbm (i_dbm.U):
2969 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2970 indicates to the C program that <rpcsvc/dbm.h> exists and should
2971 be included. Some System V systems might need this instead of <dbm.h>.
2972
2973i_sfio (i_sfio.U):
2974 This variable conditionally defines the I_SFIO symbol,
2975 and indicates whether a C program should include <sfio.h>.
2976
2977i_sgtty (i_termio.U):
2978 This variable conditionally defines the I_SGTTY symbol, which
2979 indicates to the C program that it should include <sgtty.h> rather
2980 than <termio.h>.
2981
2982i_shadow (i_shadow.U):
2983 This variable conditionally defines the I_SHADOW symbol, and indicates
2984 whether a C program should include <shadow.h>.
2985
2986i_socks (i_socks.U):
2987 This variable conditionally defines the I_SOCKS symbol, and indicates
2988 whether a C program should include <socks.h>.
2989
2990i_stdarg (i_varhdr.U):
2991 This variable conditionally defines the I_STDARG symbol, which
2992 indicates to the C program that <stdarg.h> exists and should
2993 be included.
2994
2995i_stddef (i_stddef.U):
2996 This variable conditionally defines the I_STDDEF symbol, which
2997 indicates to the C program that <stddef.h> exists and should
2998 be included.
2999
3000i_stdlib (i_stdlib.U):
3001 This variable conditionally defines the I_STDLIB symbol, which
3002 indicates to the C program that <stdlib.h> exists and should
3003 be included.
3004
3005i_string (i_string.U):
3006 This variable conditionally defines the I_STRING symbol, which
3007 indicates that <string.h> should be included rather than <strings.h>.
3008
792d8dab
JH
3009i_sunmath (i_sunmath.U):
3010 This variable conditionally defines the I_SUNMATH symbol, and indicates
3011 whether a C program should include <sunmath.h>.
3012
781b178c
JH
3013i_sysaccess (i_sysaccess.U):
3014 This variable conditionally defines the I_SYS_ACCESS symbol,
3015 and indicates whether a C program should include <sys/access.h>.
3016
3017i_sysdir (i_sysdir.U):
3018 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3019 whether a C program should include <sys/dir.h>.
3020
3021i_sysfile (i_sysfile.U):
3022 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3023 whether a C program should include <sys/file.h> to get R_OK and friends.
3024
3025i_sysfilio (i_sysioctl.U):
3026 This variable conditionally defines the I_SYS_FILIO symbol, which
3027 indicates to the C program that <sys/filio.h> exists and should
3028 be included in preference to <sys/ioctl.h>.
3029
3030i_sysin (i_niin.U):
3031 This variable conditionally defines I_SYS_IN, which indicates
3032 to the C program that it should include <sys/in.h> instead of
3033 <netinet/in.h>.
3034
3035i_sysioctl (i_sysioctl.U):
3036 This variable conditionally defines the I_SYS_IOCTL symbol, which
3037 indicates to the C program that <sys/ioctl.h> exists and should
3038 be included.
3039
ca52efda
JH
3040i_syslog (i_syslog.U):
3041 This variable conditionally defines the I_SYSLOG symbol,
3042 and indicates whether a C program should include <syslog.h>.
3043
fe749a9f
JH
3044i_sysmman (i_sysmman.U):
3045 This variable conditionally defines the I_SYS_MMAN symbol, and
3046 indicates whether a C program should include <sys/mman.h>.
3047
87b71857
JH
3048i_sysmode (i_sysmode.U):
3049 This variable conditionally defines the I_SYSMODE symbol,
3050 and indicates whether a C program should include <sys/mode.h>.
3051
781b178c
JH
3052i_sysmount (i_sysmount.U):
3053 This variable conditionally defines the I_SYSMOUNT symbol,
3054 and indicates whether a C program should include <sys/mount.h>.
3055
3056i_sysndir (i_sysndir.U):
3057 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3058 whether a C program should include <sys/ndir.h>.
3059
3060i_sysparam (i_sysparam.U):
3061 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3062 whether a C program should include <sys/param.h>.
3063
3064i_sysresrc (i_sysresrc.U):
3065 This variable conditionally defines the I_SYS_RESOURCE symbol,
3066 and indicates whether a C program should include <sys/resource.h>.
3067
3068i_syssecrt (i_syssecrt.U):
3069 This variable conditionally defines the I_SYS_SECURITY symbol,
3070 and indicates whether a C program should include <sys/security.h>.
3071
3072i_sysselct (i_sysselct.U):
3073 This variable conditionally defines I_SYS_SELECT, which indicates
3074 to the C program that it should include <sys/select.h> in order to
3075 get the definition of struct timeval.
3076
3077i_syssockio (i_sysioctl.U):
3078 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3079 C program that socket ioctl codes may be found in <sys/sockio.h>
3080 instead of <sys/ioctl.h>.
3081
3082i_sysstat (i_sysstat.U):
3083 This variable conditionally defines the I_SYS_STAT symbol,
3084 and indicates whether a C program should include <sys/stat.h>.
3085
0545a864
JH
3086i_sysstatfs (i_sysstatfs.U):
3087 This variable conditionally defines the I_SYSSTATFS symbol,
3088 and indicates whether a C program should include <sys/statfs.h>.
3089
781b178c
JH
3090i_sysstatvfs (i_sysstatvfs.U):
3091 This variable conditionally defines the I_SYSSTATVFS symbol,
3092 and indicates whether a C program should include <sys/statvfs.h>.
3093
3094i_systime (i_time.U):
3095 This variable conditionally defines I_SYS_TIME, which indicates
3096 to the C program that it should include <sys/time.h>.
3097
3098i_systimek (i_time.U):
3099 This variable conditionally defines I_SYS_TIME_KERNEL, which
3100 indicates to the C program that it should include <sys/time.h>
3101 with KERNEL defined.
3102
3103i_systimes (i_systimes.U):
3104 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3105 whether a C program should include <sys/times.h>.
3106
3107i_systypes (i_systypes.U):
3108 This variable conditionally defines the I_SYS_TYPES symbol,
3109 and indicates whether a C program should include <sys/types.h>.
3110
3111i_sysuio (i_sysuio.U):
3112 This variable conditionally defines the I_SYSUIO symbol, and indicates
3113 whether a C program should include <sys/uio.h>.
3114
3115i_sysun (i_sysun.U):
3116 This variable conditionally defines I_SYS_UN, which indicates
3117 to the C program that it should include <sys/un.h> to get UNIX
3118 domain socket definitions.
3119
d4935d7f
JH
3120i_sysutsname (i_sysutsname.U):
3121 This variable conditionally defines the I_SYSUTSNAME symbol,
3122 and indicates whether a C program should include <sys/utsname.h>.
3123
0545a864
JH
3124i_sysvfs (i_sysvfs.U):
3125 This variable conditionally defines the I_SYSVFS symbol,
3126 and indicates whether a C program should include <sys/vfs.h>.
3127
781b178c
JH
3128i_syswait (i_syswait.U):
3129 This variable conditionally defines I_SYS_WAIT, which indicates
3130 to the C program that it should include <sys/wait.h>.
3131
3132i_termio (i_termio.U):
3133 This variable conditionally defines the I_TERMIO symbol, which
3134 indicates to the C program that it should include <termio.h> rather
3135 than <sgtty.h>.
3136
3137i_termios (i_termio.U):
3138 This variable conditionally defines the I_TERMIOS symbol, which
3139 indicates to the C program that the POSIX <termios.h> file is
3140 to be included.
3141
3142i_time (i_time.U):
3143 This variable conditionally defines I_TIME, which indicates
3144 to the C program that it should include <time.h>.
3145
3146i_unistd (i_unistd.U):
3147 This variable conditionally defines the I_UNISTD symbol, and indicates
3148 whether a C program should include <unistd.h>.
3149
0545a864
JH
3150i_ustat (i_ustat.U):
3151 This variable conditionally defines the I_USTAT symbol, and indicates
3152 whether a C program should include <ustat.h>.
3153
781b178c
JH
3154i_utime (i_utime.U):
3155 This variable conditionally defines the I_UTIME symbol, and indicates
3156 whether a C program should include <utime.h>.
3157
3158i_values (i_values.U):
3159 This variable conditionally defines the I_VALUES symbol, and indicates
3160 whether a C program may include <values.h> to get symbols like MAXLONG
3161 and friends.
3162
3163i_varargs (i_varhdr.U):
3164 This variable conditionally defines I_VARARGS, which indicates
3165 to the C program that it should include <varargs.h>.
3166
3167i_varhdr (i_varhdr.U):
3168 Contains the name of the header to be included to get va_dcl definition.
3169 Typically one of varargs.h or stdarg.h.
3170
3171i_vfork (i_vfork.U):
3172 This variable conditionally defines the I_VFORK symbol, and indicates
3173 whether a C program should include vfork.h.
3174
3175ignore_versioned_solibs (libs.U):
3176 This variable should be non-empty if non-versioned shared
3177 libraries (libfoo.so.x.y) are to be ignored (because they
3178 cannot be linked against).
3179
ff935051
JH
3180inc_version_list (inc_version_list.U):
3181 This variable specifies the list of subdirectories in over
3182 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
3183 search when adding directories to @INC. The elements in
3184 the list are separated by spaces. This is only useful
ff935051
JH
3185 if you have a perl library directory tree structured like the
3186 default one. See INSTALL for how this works. The versioned
3187 site_perl directory was introduced in 5.005, so that is the
3188 lowest possible value.
3189
df4c34dc
MB
3190 This list includes architecture-dependent directories back to
3191 version $api_versionstring (e.g. 5.5.640) and
3192 architecture-independent directories all the way back to
3193 5.005.
3194
3a096bf3
JH
3195inc_version_list_init (inc_version_list.U):
3196 This variable holds the same list as inc_version_list, but
635aebb7 3197 each item is enclosed in double quotes and separated by commas,
3a096bf3
JH
3198 suitable for use in the PERL_INC_VERSION_LIST initialization.
3199
781b178c 3200incpath (usrinc.U):
209e5c0a
JH
3201 This variable must preceed the normal include path to get hte
3202 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
3203 Value can be "" or "/bsd43" on mips.
3204
3205inews (Loc.U):
3206 This variable is defined but not used by Configure.
3207 The value is a plain '' and is not useful.
3208
df4c34dc
MB
3209initialinstalllocation (bin.U):
3210 When userelocatableinc is true, this variable holds the location
3211 that make install should copy the perl binary to, with all the
3212 run-time relocatable paths calculated from this at install time.
3213 When used, it is initialised to the original value of binexp, and
3214 then binexp is set to '.../', as the other binaries are found
3215 relative to the perl binary.
3216
781b178c
JH
3217installarchlib (archlib.U):
3218 This variable is really the same as archlibexp but may differ on
3219 those systems using AFS. For extra portability, only this variable
3220 should be used in makefiles.
3221
3222installbin (bin.U):
3223 This variable is the same as binexp unless AFS is running in which case
3224 the user is explicitely prompted for it. This variable should always
3225 be used in your makefiles for maximum portability.
3226
10305dfa 3227installhtml1dir (html1dir.U):
635aebb7
AL
3228 This variable is really the same as html1direxp, unless you are
3229 using a different installprefix. For extra portability, you
10305dfa
JH
3230 should only use this variable within your makefiles.
3231
3232installhtml3dir (html3dir.U):
635aebb7
AL
3233 This variable is really the same as html3direxp, unless you are
3234 using a different installprefix. For extra portability, you
10305dfa
JH
3235 should only use this variable within your makefiles.
3236
781b178c
JH
3237installman1dir (man1dir.U):
3238 This variable is really the same as man1direxp, unless you are using
3239 AFS in which case it points to the read/write location whereas
3240 man1direxp only points to the read-only access location. For extra
3241 portability, you should only use this variable within your makefiles.
3242
3243installman3dir (man3dir.U):
3244 This variable is really the same as man3direxp, unless you are using
3245 AFS in which case it points to the read/write location whereas
3246 man3direxp only points to the read-only access location. For extra
3247 portability, you should only use this variable within your makefiles.
3248
3249installprefix (installprefix.U):
635aebb7 3250 This variable holds the name of the directory below which
781b178c
JH
3251 "make install" will install the package. For most users, this
3252 is the same as prefix. However, it is useful for
3253 installing the software into a different (usually temporary)
3254 location after which it can be bundled up and moved somehow
3255 to the final location specified by prefix.
3256
3257installprefixexp (installprefix.U):
3258 This variable holds the full absolute path of installprefix
3259 with all ~-expansion done.
3260
3261installprivlib (privlib.U):
3262 This variable is really the same as privlibexp but may differ on
3263 those systems using AFS. For extra portability, only this variable
3264 should be used in makefiles.
3265
3266installscript (scriptdir.U):
3267 This variable is usually the same as scriptdirexp, unless you are on
3268 a system running AFS, in which case they may differ slightly. You
3269 should always use this variable within your makefiles for portability.
3270
3271installsitearch (sitearch.U):
3272 This variable is really the same as sitearchexp but may differ on
3273 those systems using AFS. For extra portability, only this variable
3274 should be used in makefiles.
3275
0617aed7
JH
3276installsitebin (sitebin.U):
3277 This variable is usually the same as sitebinexp, unless you are on
3278 a system running AFS, in which case they may differ slightly. You
3279 should always use this variable within your makefiles for portability.
3280
e755722e
JH
3281installsitehtml1dir (sitehtml1dir.U):
3282 This variable is really the same as sitehtml1direxp, unless you are using
10305dfa
JH
3283 AFS in which case it points to the read/write location whereas
3284 html1direxp only points to the read-only access location. For extra
3285 portability, you should only use this variable within your makefiles.
3286
e755722e
JH
3287installsitehtml3dir (sitehtml3dir.U):
3288 This variable is really the same as sitehtml3direxp, unless you are using
10305dfa
JH
3289 AFS in which case it points to the read/write location whereas
3290 html3direxp only points to the read-only access location. For extra
3291 portability, you should only use this variable within your makefiles.
3292
781b178c
JH
3293installsitelib (sitelib.U):
3294 This variable is really the same as sitelibexp but may differ on
3295 those systems using AFS. For extra portability, only this variable
3296 should be used in makefiles.
3297
e755722e
JH
3298installsiteman1dir (siteman1dir.U):
3299 This variable is really the same as siteman1direxp, unless you are using
10305dfa
JH
3300 AFS in which case it points to the read/write location whereas
3301 man1direxp only points to the read-only access location. For extra
3302 portability, you should only use this variable within your makefiles.
3303
e755722e
JH
3304installsiteman3dir (siteman3dir.U):
3305 This variable is really the same as siteman3direxp, unless you are using
10305dfa
JH
3306 AFS in which case it points to the read/write location whereas
3307 man3direxp only points to the read-only access location. For extra
3308 portability, you should only use this variable within your makefiles.
3309
3310installsitescript (sitescript.U):
3311 This variable is usually the same as sitescriptexp, unless you are on
3312 a system running AFS, in which case they may differ slightly. You
3313 should always use this variable within your makefiles for portability.
3314
781b178c
JH
3315installstyle (installstyle.U):
3316 This variable describes the "style" of the perl installation.
3317 This is intended to be useful for tools that need to
3318 manipulate entire perl distributions. Perl itself doesn't use
3319 this to find its libraries -- the library directories are
3320 stored directly in Config.pm. Currently, there are only two
3321 styles: "lib" and "lib/perl5". The default library locations
3322 (e.g. privlib, sitelib) are either $prefix/lib or
3323 $prefix/lib/perl5. The former is useful if $prefix is a
3324 directory dedicated to perl (e.g. /opt/perl), while the latter
3325 is useful if $prefix is shared by many packages, e.g. if
3326 $prefix=/usr/local.
9c20e9bc 3327
123f32c0
MB
3328 Unfortunately, while this "style" variable is used to set
3329 defaults for all three directory hierarchies (core, vendor, and
3330 site), there is no guarantee that the same style is actually
3331 appropriate for all those directories. For example, $prefix
3332 might be /opt/perl, but $siteprefix might be /usr/local.
3333 (Perhaps, in retrospect, the "lib" style should never have been
3334 supported, but it did seem like a nice idea at the time.)
3335
3336 The situation is even less clear for tools such as MakeMaker
3337 that can be used to install additional modules into
3338 non-standard places. For example, if a user intends to install
3339 a module into a private directory (perhaps by setting PREFIX on
3340 the Makefile.PL command line), then there is no reason to
3341 assume that the Configure-time $installstyle setting will be
3342 relevant for that PREFIX.
3343
9c20e9bc 3344 This may later be extended to include other information, so
781b178c 3345 be careful with pattern-matching on the results.
9c20e9bc
JH
3346
3347 For compatibility with perl5.005 and earlier, the default
781b178c
JH
3348 setting is based on whether or not $prefix contains the string
3349 "perl".
3350
3351installusrbinperl (instubperl.U):
3352 This variable tells whether Perl should be installed also as
3353 /usr/bin/perl in addition to
3354 $installbin/perl
3355
526fdc24
MS
3356installvendorarch (vendorarch.U):
3357 This variable is really the same as vendorarchexp but may differ on
3358 those systems using AFS. For extra portability, only this variable
3359 should be used in makefiles.
3360
0617aed7
JH
3361installvendorbin (vendorbin.U):
3362 This variable is really the same as vendorbinexp but may differ on
3363 those systems using AFS. For extra portability, only this variable
3364 should be used in makefiles.
3365
e755722e
JH
3366installvendorhtml1dir (vendorhtml1dir.U):
3367 This variable is really the same as vendorhtml1direxp but may differ on
10305dfa
JH
3368 those systems using AFS. For extra portability, only this variable
3369 should be used in makefiles.
3370
e755722e
JH
3371installvendorhtml3dir (vendorhtml3dir.U):
3372 This variable is really the same as vendorhtml3direxp but may differ on
10305dfa
JH
3373 those systems using AFS. For extra portability, only this variable
3374 should be used in makefiles.
3375
a3635516
JH
3376installvendorlib (vendorlib.U):
3377 This variable is really the same as vendorlibexp but may differ on
3378 those systems using AFS. For extra portability, only this variable
3379 should be used in makefiles.
3380
e755722e
JH
3381installvendorman1dir (vendorman1dir.U):
3382 This variable is really the same as vendorman1direxp but may differ on
10305dfa
JH
3383 those systems using AFS. For extra portability, only this variable
3384 should be used in makefiles.
3385
e755722e
JH
3386installvendorman3dir (vendorman3dir.U):
3387 This variable is really the same as vendorman3direxp but may differ on
10305dfa
JH
3388 those systems using AFS. For extra portability, only this variable
3389 should be used in makefiles.
3390
3391installvendorscript (vendorscript.U):
3392 This variable is really the same as vendorscriptexp but may differ on
3393 those systems using AFS. For extra portability, only this variable
3394 should be used in makefiles.
3395
781b178c
JH
3396intsize (intsize.U):
3397 This variable contains the value of the INTSIZE symbol, which
3398 indicates to the C program how many bytes there are in an int.
3399
4b661809 3400issymlink (issymlink.U):
983dbef6
JH
3401 This variable holds the test command to test for a symbolic link
3402 (if they are supported). Typical values include 'test -h' and
3403 'test -L'.
4b661809 3404
a22e52b9
JH
3405ivdformat (perlxvf.U):
3406 This variable contains the format string used for printing
635aebb7 3407 a Perl IV as a signed decimal integer.
a22e52b9
JH
3408
3409ivsize (perlxv.U):
3410 This variable is the size of an IV in bytes.
3411
3412ivtype (perlxv.U):
3413 This variable contains the C type used for Perl's IV.
3414
781b178c 3415known_extensions (Extensions.U):
635aebb7 3416 This variable holds a list of all XS extensions included in
781b178c
JH
3417 the package.
3418
3419ksh (Loc.U):
3420 This variable is defined but not used by Configure.
3421 The value is a plain '' and is not useful.
3422
781b178c
JH
3423ld (dlsrc.U):
3424 This variable indicates the program to be used to link
3425 libraries for dynamic loading. On some systems, it is 'ld'.
3426 On ELF systems, it should be $cc. Mostly, we'll try to respect
3427 the hint file setting.
3428
3429lddlflags (dlsrc.U):
3430 This variable contains any special flags that might need to be
3431 passed to $ld to create a shared library suitable for dynamic
3432 loading. It is up to the makefile to use it. For hpux, it
3433 should be '-b'. For sunos 4.1, it is empty.
3434
3435ldflags (ccflags.U):
3436 This variable contains any additional C loader flags desired by
3437 the user. It is up to the Makefile to use this.
3438
af960fef
JH
3439ldflags_uselargefiles (uselfs.U):
3440 This variable contains the loader flags needed by large file builds
3441 and added to ldflags by hints files.
3442
781b178c
JH
3443ldlibpthname (libperl.U):
3444 This variable holds the name of the shared library
3445 search path, often LD_LIBRARY_PATH. To get an empty
3446 string, the hints file must set this to 'none'.
3447
3448less (Loc.U):
5bf26616 3449 This variable is used internally by Configure to determine the
781b178c
JH
3450 full pathname (if any) of the less program. After Configure runs,
3451 the value is reset to a plain "less" and is not useful.
3452
3453lib_ext (Unix.U):
3454 This is an old synonym for _a.
3455
3456libc (libc.U):
3457 This variable contains the location of the C library.
3458
3459libperl (libperl.U):
3460 The perl executable is obtained by linking perlmain.c with
3461 libperl, any static extensions (usually just DynaLoader),
3462 and any other libraries needed on this system. libperl
3463 is usually libperl.a, but can also be libperl.so.xxx if
3464 the user wishes to build a perl executable with a shared
3465 library.
3466
3467libpth (libpth.U):
3468 This variable holds the general path (space-separated) used to find
3469 libraries. It is intended to be used by other units.
3470
3471libs (libs.U):
3472 This variable holds the additional libraries we want to use.
9285ede2 3473 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3474
fe749a9f
JH
3475libsdirs (libs.U):
3476 This variable holds the directory names aka dirnames of the libraries
3477 we found and accepted, duplicates are removed.
3478
3479libsfiles (libs.U):
3480 This variable holds the filenames aka basenames of the libraries
3481 we found and accepted.
3482
3483libsfound (libs.U):
3484 This variable holds the full pathnames of the libraries
3485 we found and accepted.
3486
13b3f787
JH
3487libspath (libs.U):
3488 This variable holds the directory names probed for libraries.
3489
781b178c
JH
3490libswanted (Myinit.U):
3491 This variable holds a list of all the libraries we want to
3492 search. The order is chosen to pick up the c library
3493 ahead of ucb or bsd libraries for SVR4.
3494
af960fef
JH
3495libswanted_uselargefiles (uselfs.U):
3496 This variable contains the libraries needed by large file builds
3497 and added to ldflags by hints files. It is a space separated list
3498 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3499 like libswanted..
af960fef 3500
781b178c 3501line (Loc.U):
ff935051
JH
3502 This variable is defined but not used by Configure.
3503 The value is a plain '' and is not useful.
781b178c
JH
3504
3505lint (Loc.U):
3506 This variable is defined but not used by Configure.
3507 The value is a plain '' and is not useful.
3508
3509lkflags (ccflags.U):
3510 This variable contains any additional C partial linker flags desired by
3511 the user. It is up to the Makefile to use this.
3512
3513ln (Loc.U):
5bf26616 3514 This variable is used internally by Configure to determine the
781b178c
JH
3515 full pathname (if any) of the ln program. After Configure runs,
3516 the value is reset to a plain "ln" and is not useful.
3517
3518lns (lns.U):
635aebb7 3519 This variable holds the name of the command to make
781b178c
JH
3520 symbolic links (if they are supported). It can be used
3521 in the Makefile. It is either 'ln -s' or 'ln'
3522
10bc17b6
JH
3523localtime_r_proto (d_localtime_r.U):
3524 This variable encodes the prototype of localtime_r.
39183afa
JH
3525 It is zero if d_localtime_r is undef, and one of the
3526 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3527 is defined.
10bc17b6 3528
781b178c
JH
3529locincpth (ccflags.U):
3530 This variable contains a list of additional directories to be
3531 searched by the compiler. The appropriate '-I' directives will
3532 be added to ccflags. This is intended to simplify setting
3533 local directories from the Configure command line.
3534 It's not much, but it parallels the loclibpth stuff in libpth.U.
3535
3536loclibpth (libpth.U):
3537 This variable holds the paths (space-separated) used to find local
3538 libraries. It is prepended to libpth, and is intended to be easily
3539 set from the command line.
3540
3541longdblsize (d_longdbl.U):
3542 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3543 indicates to the C program how many bytes there are in a long double,
3544 if this system supports long doubles.
3545
3546longlongsize (d_longlong.U):
3547 This variable contains the value of the LONGLONGSIZE symbol, which
3548 indicates to the C program how many bytes there are in a long long,
3549 if this system supports long long.
3550
3551longsize (intsize.U):
3552 This variable contains the value of the LONGSIZE symbol, which
3553 indicates to the C program how many bytes there are in a long.
3554
3555lp (Loc.U):
3556 This variable is defined but not used by Configure.
3557 The value is a plain '' and is not useful.
3558
3559lpr (Loc.U):
3560 This variable is defined but not used by Configure.
3561 The value is a plain '' and is not useful.
3562
3563ls (Loc.U):
5bf26616 3564 This variable is used internally by Configure to determine the
781b178c
JH
3565 full pathname (if any) of the ls program. After Configure runs,
3566 the value is reset to a plain "ls" and is not useful.
3567
3568lseeksize (lseektype.U):
635aebb7 3569 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3570 or whatever type is used to declare lseek offset's type in the
3571 kernel (which also appears to be lseek's return type).
3572
3573lseektype (lseektype.U):
635aebb7 3574 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3575 or whatever type is used to declare lseek offset's type in the
3576 kernel (which also appears to be lseek's return type).
3577
d620c7b3 3578mad (mad.U):
a724edfe
NC
3579 This variable indicates that the Misc Attribute Definition code is to
3580 be compiled.
3581
52ca670a
MB
3582madlyh (mad.U):
3583 If the Misc Attribute Decoration is to be compiled, this variable is
3584 set to the name of the extra header files to be used, else it is ''
3585
3586madlyobj (mad.U):
3587 If the Misc Attribute Decoration is to be compiled, this variable is
3588 set to the name of the extra object files to be used, else it is ''
3589
3590madlysrc (mad.U):
3591 If the Misc Attribute Decoration is to be compiled, this variable is
3592 set to the name of the extra C source files to be used, else it is ''
3593
781b178c
JH
3594mail (Loc.U):
3595 This variable is defined but not used by Configure.
3596 The value is a plain '' and is not useful.
3597
3598mailx (Loc.U):
3599 This variable is defined but not used by Configure.
3600 The value is a plain '' and is not useful.
3601
3602make (Loc.U):
5bf26616 3603 This variable is used internally by Configure to determine the
c532c9d1
JH
3604 full pathname (if any) of the make program. After Configure runs,
3605 the value is reset to a plain "make" and is not useful.
3606
781b178c
JH
3607make_set_make (make.U):
3608 Some versions of 'make' set the variable MAKE. Others do not.
3609 This variable contains the string to be included in Makefile.SH
3610 so that MAKE is set if needed, and not if not needed.
3611 Possible values are:
44b94491 3612
781b178c 3613 make_set_make='#' # If your make program handles this for you,
44b94491 3614
781b178c 3615 make_set_make="MAKE=$make" # if it doesn't.
44b94491
MB
3616
3617 This uses a comment character to distinguish a
1d896104 3618 'set' value (from a previous config.sh or Configure '-D' option)
781b178c
JH
3619 from an uncomputed value.
3620
3621mallocobj (mallocsrc.U):
3622 This variable contains the name of the malloc.o that this package
3623 generates, if that malloc.o is preferred over the system malloc.
3624 Otherwise the value is null. This variable is intended for generating
3625 Makefiles. See mallocsrc.
3626
3627mallocsrc (mallocsrc.U):
3628 This variable contains the name of the malloc.c that comes with
3629 the package, if that malloc.c is preferred over the system malloc.
3630 Otherwise the value is null. This variable is intended for generating
3631 Makefiles.
3632
3633malloctype (mallocsrc.U):
3634 This variable contains the kind of ptr returned by malloc and realloc.
3635
3636man1dir (man1dir.U):
3637 This variable contains the name of the directory in which manual
3638 source pages are to be put. It is the responsibility of the
3639 Makefile.SH to get the value of this into the proper command.
3640 You must be prepared to do the ~name expansion yourself.
3641
3642man1direxp (man1dir.U):
3643 This variable is the same as the man1dir variable, but is filename
3644 expanded at configuration time, for convenient use in makefiles.
3645
3646man1ext (man1dir.U):
3647 This variable contains the extension that the manual page should
3648 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3649 See man1dir.
3650
3651man3dir (man3dir.U):
3652 This variable contains the name of the directory in which manual
3653 source pages are to be put. It is the responsibility of the
3654 Makefile.SH to get the value of this into the proper command.
3655 You must be prepared to do the ~name expansion yourself.
3656
3657man3direxp (man3dir.U):
3658 This variable is the same as the man3dir variable, but is filename
3659 expanded at configuration time, for convenient use in makefiles.
3660
3661man3ext (man3dir.U):
3662 This variable contains the extension that the manual page should
3663 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3664 See man3dir.
3665
4d54317a
JH
3666Mcc (Loc.U):
3667 This variable is used internally by Configure to determine the
3668 full pathname (if any) of the Mcc program. After Configure runs,
3669 the value is reset to a plain "Mcc" and is not useful.
3670
781b178c
JH
3671mips_type (usrinc.U):
3672 This variable holds the environment type for the mips system.
3673 Possible values are "BSD 4.3" and "System V".
3674
65d1576c 3675mistrustnm (Csym.U):
5129fff4
JH
3676 This variable can be used to establish a fallthrough for the cases
3677 where nm fails to find a symbol. If usenm is false or usenm is true
3678 and mistrustnm is false, this variable has no effect. If usenm is true
3679 and mistrustnm is "compile", a test program will be compiled to try to
3680 find any symbol that can't be located via nm lookup. If mistrustnm is
3681 "run", the test program will be run as well as being compiled.
3682
781b178c 3683mkdir (Loc.U):
5bf26616 3684 This variable is used internally by Configure to determine the
781b178c
JH
3685 full pathname (if any) of the mkdir program. After Configure runs,
3686 the value is reset to a plain "mkdir" and is not useful.
3687
fe749a9f
JH
3688mmaptype (d_mmap.U):
3689 This symbol contains the type of pointer returned by mmap()
3690 (and simultaneously the type of the first argument).
3691 It can be 'void *' or 'caddr_t'.
3692
781b178c 3693modetype (modetype.U):
635aebb7
AL
3694 This variable defines modetype to be something like mode_t,
3695 int, unsigned short, or whatever type is used to declare file
781b178c
JH
3696 modes for system calls.
3697
3698more (Loc.U):
5bf26616 3699 This variable is used internally by Configure to determine the
781b178c
JH
3700 full pathname (if any) of the more program. After Configure runs,
3701 the value is reset to a plain "more" and is not useful.
3702
3703multiarch (multiarch.U):
3704 This variable conditionally defines the MULTIARCH symbol
3705 which signifies the presence of multiplatform files.
3706 This is normally set by hints files.
3707
3708mv (Loc.U):
3709 This variable is defined but not used by Configure.
3710 The value is a plain '' and is not useful.
3711
3712myarchname (archname.U):
3713 This variable holds the architecture name computed by Configure in
3714 a previous run. It is not intended to be perused by any user and
3715 should never be set in a hint file.
3716
3717mydomain (myhostname.U):
3718 This variable contains the eventual value of the MYDOMAIN symbol,
3719 which is the domain of the host the program is going to run on.
3720 The domain must be appended to myhostname to form a complete host name.
3721 The dot comes with mydomain, and need not be supplied by the program.
3722
3723myhostname (myhostname.U):
3724 This variable contains the eventual value of the MYHOSTNAME symbol,
3725 which is the name of the host the program is going to run on.
3726 The domain is not kept with hostname, but must be gotten from mydomain.
3727 The dot comes with mydomain, and need not be supplied by the program.
3728
3729myuname (Oldconfig.U):
3730 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3731 pseudo variables assignments in the output are stripped, thank you. The
3732 whole thing is then lower-cased.
3733
3734n (n.U):
1d896104 3735 This variable contains the '-n' flag if that is what causes the echo
781b178c
JH
3736 command to suppress newline. Otherwise it is null. Correct usage is
3737 $echo $n "prompt for a question: $c".
3738
2cc61e15
DD
3739need_va_copy (need_va_copy.U):
3740 This symbol, if defined, indicates that the system stores
3741 the variable argument list datatype, va_list, in a format
3742 that cannot be copied by simple assignment, so that some
3743 other means must be used when copying is required.
3744 As such systems vary in their provision (or non-provision)
3745 of copying mechanisms, handy.h defines a platform-
3746 independent macro, Perl_va_copy(src, dst), to do the job.
3747
781b178c
JH
3748netdb_hlen_type (netdbtype.U):
3749 This variable holds the type used for the 2nd argument to
3750 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3751 This is only useful if you have gethostbyaddr(), naturally.
3752
3753netdb_host_type (netdbtype.U):
3754 This variable holds the type used for the 1st argument to
3755 gethostbyaddr(). Usually, this is char * or void *, possibly
3756 with or without a const prefix.
3757 This is only useful if you have gethostbyaddr(), naturally.
3758
3759netdb_name_type (netdbtype.U):
3760 This variable holds the type used for the argument to
3761 gethostbyname(). Usually, this is char * or const char *.
3762 This is only useful if you have gethostbyname(), naturally.
3763
3764netdb_net_type (netdbtype.U):
3765 This variable holds the type used for the 1st argument to
3766 getnetbyaddr(). Usually, this is int or long.
3767 This is only useful if you have getnetbyaddr(), naturally.
3768
3769nm (Loc.U):
5bf26616 3770 This variable is used internally by Configure to determine the
781b178c
JH
3771 full pathname (if any) of the nm program. After Configure runs,
3772 the value is reset to a plain "nm" and is not useful.
3773
3774nm_opt (usenm.U):
3775 This variable holds the options that may be necessary for nm.
3776
3777nm_so_opt (usenm.U):
3778 This variable holds the options that may be necessary for nm
3779 to work on a shared library but that can not be used on an
3780 archive library. Currently, this is only used by Linux, where
3781 nm --dynamic is *required* to get symbols from an ELF library which
3782 has been stripped, but nm --dynamic is *fatal* on an archive library.
3783 Maybe Linux should just always set usenm=false.
3784
3785nonxs_ext (Extensions.U):
3786 This variable holds a list of all non-xs extensions included
3787 in the package. All of them will be built.
3788
3789nroff (Loc.U):
5bf26616 3790 This variable is used internally by Configure to determine the
781b178c
JH
3791 full pathname (if any) of the nroff program. After Configure runs,
3792 the value is reset to a plain "nroff" and is not useful.
3793
2f12987e
JH
3794nv_preserves_uv_bits (perlxv.U):
3795 This variable indicates how many of bits type uvtype
3796 a variable nvtype can preserve.
3797
6b4667fc
A
3798nveformat (perlxvf.U):
3799 This variable contains the format string used for printing
3800 a Perl NV using %e-ish floating point format.
3801
4d54317a
JH
3802nvEUformat (perlxvf.U):
3803 This variable contains the format string used for printing
3804 a Perl NV using %E-ish floating point format.
3805
6b4667fc
A
3806nvfformat (perlxvf.U):
3807 This variable confains the format string used for printing
3808 a Perl NV using %f-ish floating point format.
3809
4d54317a
JH
3810nvFUformat (perlxvf.U):
3811 This variable confains the format string used for printing
3812 a Perl NV using %F-ish floating point format.
3813
6b4667fc
A
3814nvgformat (perlxvf.U):
3815 This variable contains the format string used for printing
3816 a Perl NV using %g-ish floating point format.
3817
4d54317a
JH
3818nvGUformat (perlxvf.U):
3819 This variable contains the format string used for printing
3820 a Perl NV using %G-ish floating point format.
3821
a22e52b9
JH
3822nvsize (perlxv.U):
3823 This variable is the size of an NV in bytes.
3824
3825nvtype (perlxv.U):
3826 This variable contains the C type used for Perl's NV.
3827
781b178c
JH
3828o_nonblock (nblock_io.U):
3829 This variable bears the symbol value to be used during open() or fcntl()
3830 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3831 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3832 but that is only supported by some devices.
3833
3834obj_ext (Unix.U):
3835 This is an old synonym for _o.
3836
3837old_pthread_create_joinable (d_pthrattrj.U):
3838 This variable defines the constant to use for creating joinable
3839 (aka undetached) pthreads. Unused if pthread.h defines
3840 PTHREAD_CREATE_JOINABLE. If used, possible values are
3841 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3842
3843optimize (ccflags.U):
3844 This variable contains any optimizer/debugger flag that should be used.
3845 It is up to the Makefile to use it.
3846
3847orderlib (orderlib.U):
3848 This variable is "true" if the components of libraries must be ordered
3849 (with `lorder $* | tsort`) before placing them in an archive. Set to
3850 "false" if ranlib or ar can generate random libraries.
3851
3852osname (Oldconfig.U):
3853 This variable contains the operating system name (e.g. sunos,
3854 solaris, hpux, etc.). It can be useful later on for setting
3855 defaults. Any spaces are replaced with underscores. It is set
3856 to a null string if we can't figure it out.
3857
3858osvers (Oldconfig.U):
3859 This variable contains the operating system version (e.g.
3860 4.1.3, 5.2, etc.). It is primarily used for helping select
3861 an appropriate hints file, but might be useful elsewhere for
3862 setting defaults. It is set to '' if we can't figure it out.
3863 We try to be flexible about how much of the version number
3864 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3865 same for this package, hints files might just be os_4.0 or
3866 os_4.1, etc., not keeping separate files for each little release.
3867
3b777bb4
GS
3868otherlibdirs (otherlibdirs.U):
3869 This variable contains a colon-separated set of paths for the perl
3870 binary to search for additional library files or modules.
3871 These directories will be tacked to the end of @INC.
3872 Perl will automatically search below each path for version-
3873 and architecture-specific directories. See inc_version_list
3874 for more details.
3875 A value of ' ' means 'none' and is used to preserve this value
3876 for the next run through Configure.
3877
781b178c
JH
3878package (package.U):
3879 This variable contains the name of the package being constructed.
3880 It is primarily intended for the use of later Configure units.
3881
3882pager (pager.U):
3883 This variable contains the name of the preferred pager on the system.
3884 Usual values are (the full pathnames of) more, less, pg, or cat.
3885
3886passcat (nis.U):
3887 This variable contains a command that produces the text of the
3888 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3889 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3890 On some systems, such as os390, there may be no equivalent
3891 command, in which case this variable is unset.
781b178c
JH
3892
3893patchlevel (patchlevel.U):
3894 The patchlevel level of this package.
3895 The value of patchlevel comes from the patchlevel.h file.
ff935051 3896 In a version number such as 5.6.1, this is the "6".
c890dc6c 3897 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3898
3899path_sep (Unix.U):
3900 This is an old synonym for p_ in Head.U, the character
3901 used to separate elements in the command shell search PATH.
3902
df4c34dc
MB
3903perl (Loc.U):
3904 This variable is defined but not used by Configure.
3905 The value is a plain '' and is not useful.
3906
c890dc6c
JH
3907perl5 (perl5.U):
3908 This variable contains the full path (if any) to a previously
3909 installed perl5.005 or later suitable for running the script
3910 to determine inc_version_list.
3911
1d896104
MB
3912PERL_API_REVISION (patchlevel.h):
3913 This number describes the earliest compatible PERL_REVISION of
3914 Perl ("compatibility" here being defined as sufficient binary/API
3915 compatibility to run XS code built with the older version).
3916 Normally this does not change across maintenance releases.
3917 Please read the comment in patchlevel.h.
3918
3919PERL_API_SUBVERSION (patchlevel.h):
3920 This number describes the earliest compatible PERL_SUBVERSION of
3921 Perl ("compatibility" here being defined as sufficient binary/API
3922 compatibility to