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Add non-XS extensions to known_extensions.
[perl5.git] / Porting / Glossary
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1
2!!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3This file is built by metaconfig.
4
d7418ba7 5This file contains a description of all the shell variables whose value is
6determined by the Configure script. Variables intended for use in C
269a7913 7programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
ebc74a4b 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
776a38e3 37 tests for AFSness in the 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.
fcdf39cf 145 The value is the empty string and is not useful.
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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
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153bin_ELF (dlsrc.U):
154 This variable saves the result from configure if generated binaries
155 are in ELF format. Only set to defined when the test has actually
156 been performed, and the result was positive.
157
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158binexp (bin.U):
159 This is the same as the bin variable, but is filename expanded at
160 configuration time, for use in your makefiles.
161
162bison (Loc.U):
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163 This variable is used internally by Configure to determine the
164 full pathname (if any) of the bison program. After Configure runs,
165 the value is reset to a plain "bison" and is not useful.
781b178c 166
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167bootstrap_charset (ebcdic.U):
168 This variable conditionally defines BOOTSTRAP_CHARSET if
169 this system uses non-ASCII encoding.
170
781b178c 171byacc (Loc.U):
5bf26616 172 This variable is used internally by Configure to determine the
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173 full pathname (if any) of the byacc program. After Configure runs,
174 the value is reset to a plain "byacc" and is not useful.
175
176byteorder (byteorder.U):
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177 This variable holds the byte order in a UV. In the following,
178 larger digits indicate more significance. The variable byteorder
179 is either 4321 on a big-endian machine, or 1234 on a little-endian,
180 or 87654321 on a Cray ... or 3412 with weird order !
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181
182c (n.U):
183 This variable contains the \c string if that is what causes the echo
184 command to suppress newline. Otherwise it is null. Correct usage is
185 $echo $n "prompt for a question: $c".
186
187castflags (d_castneg.U):
188 This variable contains a flag that precise difficulties the
189 compiler has casting odd floating values to unsigned long:
190 0 = ok
191 1 = couldn't cast < 0
192 2 = couldn't cast >= 0x80000000
193 4 = couldn't cast in argument expression list
194
195cat (Loc.U):
5bf26616 196 This variable is used internally by Configure to determine the
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197 full pathname (if any) of the cat program. After Configure runs,
198 the value is reset to a plain "cat" and is not useful.
199
200cc (cc.U):
201 This variable holds the name of a command to execute a C compiler which
202 can resolve multiple global references that happen to have the same
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203 name. Usual values are 'cc' and 'gcc'.
204 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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205
206cccdlflags (dlsrc.U):
207 This variable contains any special flags that might need to be
208 passed with 'cc -c' to compile modules to be used to create a shared
209 library that will be used for dynamic loading. For hpux, this
210 should be +z. It is up to the makefile to use it.
211
212ccdlflags (dlsrc.U):
213 This variable contains any special flags that might need to be
214 passed to cc to link with a shared library for dynamic loading.
215 It is up to the makefile to use it. For sunos 4.1, it should
216 be empty.
217
218ccflags (ccflags.U):
219 This variable contains any additional C compiler flags desired by
220 the user. It is up to the Makefile to use this.
221
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222ccflags_uselargefiles (uselfs.U):
223 This variable contains the compiler flags needed by large file builds
224 and added to ccflags by hints files.
225
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226ccname (Checkcc.U):
227 This can set either by hints files or by Configure. If using
228 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
229 Some platforms, however, make good use of this by storing the
230 flavor of the C compiler being used here. For example if using
231 the Sun WorkShop suite, ccname will be 'workshop'.
232
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233ccsymbols (Cppsym.U):
234 The variable contains the symbols defined by the C compiler alone.
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235 The symbols defined by cpp or by cc when it calls cpp are not in
236 this list, see cppsymbols and cppccsymbols.
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237 The list is a space-separated list of symbol=value tokens.
238
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239ccversion (Checkcc.U):
240 This can set either by hints files or by Configure. If using
241 a (non-gcc) vendor cc, this variable may contain a version for
242 the compiler.
243
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244cf_by (cf_who.U):
245 Login name of the person who ran the Configure script and answered the
246 questions. This is used to tag both config.sh and config_h.SH.
247
248cf_email (cf_email.U):
249 Electronic mail address of the person who ran Configure. This can be
250 used by units that require the user's e-mail, like MailList.U.
251
252cf_time (cf_who.U):
253 Holds the output of the "date" command when the configuration file was
254 produced. This is used to tag both config.sh and config_h.SH.
255
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256charbits (charsize.U):
257 This variable contains the value of the CHARBITS symbol, which
258 indicates to the C program how many bits there are in a character.
259
260charsize (charsize.U):
261 This variable contains the value of the CHARSIZE symbol, which
262 indicates to the C program how many bytes there are in a character.
263
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264chgrp (Loc.U):
265 This variable is defined but not used by Configure.
fcdf39cf 266 The value is the empty string and is not useful.
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267
268chmod (Loc.U):
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269 This variable is used internally by Configure to determine the
270 full pathname (if any) of the chmod program. After Configure runs,
271 the value is reset to a plain "chmod" and is not useful.
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272
273chown (Loc.U):
274 This variable is defined but not used by Configure.
fcdf39cf 275 The value is the empty string and is not useful.
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276
277clocktype (d_times.U):
278 This variable holds the type returned by times(). It can be long,
279 or clock_t on BSD sites (in which case <sys/types.h> should be
280 included).
281
282comm (Loc.U):
5bf26616 283 This variable is used internally by Configure to determine the
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284 full pathname (if any) of the comm program. After Configure runs,
285 the value is reset to a plain "comm" and is not useful.
286
287compress (Loc.U):
288 This variable is defined but not used by Configure.
fcdf39cf 289 The value is the empty string and is not useful.
781b178c 290
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291config_arg0 (Options.U):
292 This variable contains the string used to invoke the Configure
293 command, as reported by the shell in the $0 variable.
294
295config_argc (Options.U):
47e01c32 296 This variable contains the number of command-line arguments
ecf5c238 297 passed to Configure, as reported by the shell in the $# variable.
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298 The individual arguments are stored as variables config_arg1,
299 config_arg2, etc.
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300
301config_args (Options.U):
302 This variable contains a single string giving the command-line
303 arguments passed to Configure. Spaces within arguments,
304 quotes, and escaped characters are not correctly preserved.
305 To reconstruct the command line, you must assemble the individual
306 command line pieces, given in config_arg[0-9]*.
307
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308contains (contains.U):
309 This variable holds the command to do a grep with a proper return
310 status. On most sane systems it is simply "grep". On insane systems
311 it is a grep followed by a cat followed by a test. This variable
312 is primarily for the use of other Configure units.
313
314cp (Loc.U):
5bf26616 315 This variable is used internally by Configure to determine the
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316 full pathname (if any) of the cp program. After Configure runs,
317 the value is reset to a plain "cp" and is not useful.
318
319cpio (Loc.U):
320 This variable is defined but not used by Configure.
fcdf39cf 321 The value is the empty string and is not useful.
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322
323cpp (Loc.U):
5bf26616 324 This variable is used internally by Configure to determine the
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325 full pathname (if any) of the cpp program. After Configure runs,
326 the value is reset to a plain "cpp" and is not useful.
327
328cpp_stuff (cpp_stuff.U):
505656d3 329 This variable contains an identification of the concatenation mechanism
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330 used by the C preprocessor.
331
332cppccsymbols (Cppsym.U):
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333 The variable contains the symbols defined by the C compiler
334 when it calls cpp. The symbols defined by the cc alone or cpp
335 alone are not in this list, see ccsymbols and cppsymbols.
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336 The list is a space-separated list of symbol=value tokens.
337
338cppflags (ccflags.U):
339 This variable holds the flags that will be passed to the C pre-
340 processor. It is up to the Makefile to use it.
341
342cpplast (cppstdin.U):
343 This variable has the same functionality as cppminus, only it applies
344 to cpprun and not cppstdin.
345
346cppminus (cppstdin.U):
347 This variable contains the second part of the string which will invoke
348 the C preprocessor on the standard input and produce to standard
349 output. This variable will have the value "-" if cppstdin needs
350 a minus to specify standard input, otherwise the value is "".
351
352cpprun (cppstdin.U):
353 This variable contains the command which will invoke a C preprocessor
354 on standard input and put the output to stdout. It is guaranteed not
355 to be a wrapper and may be a null string if no preprocessor can be
356 made directly available. This preprocessor might be different from the
357 one used by the C compiler. Don't forget to append cpplast after the
358 preprocessor options.
359
360cppstdin (cppstdin.U):
361 This variable contains the command which will invoke the C
362 preprocessor on standard input and put the output to stdout.
363 It is primarily used by other Configure units that ask about
364 preprocessor symbols.
365
366cppsymbols (Cppsym.U):
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367 The variable contains the symbols defined by the C preprocessor
368 alone. The symbols defined by cc or by cc when it calls cpp are
369 not in this list, see ccsymbols and cppccsymbols.
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370 The list is a space-separated list of symbol=value tokens.
371
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372crypt_r_proto (d_crypt_r.U):
373 This variable encodes the prototype of crypt_r.
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374 It is zero if d_crypt_r is undef, and one of the
375 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
376 is defined.
10bc17b6 377
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378cryptlib (d_crypt.U):
379 This variable holds -lcrypt or the path to a libcrypt.a archive if
380 the crypt() function is not defined in the standard C library. It is
381 up to the Makefile to use this.
382
383csh (Loc.U):
5bf26616 384 This variable is used internally by Configure to determine the
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385 full pathname (if any) of the csh program. After Configure runs,
386 the value is reset to a plain "csh" and is not useful.
387
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388ctermid_r_proto (d_ctermid_r.U):
389 This variable encodes the prototype of ctermid_r.
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390 It is zero if d_ctermid_r is undef, and one of the
391 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
392 is defined.
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393
394ctime_r_proto (d_ctime_r.U):
395 This variable encodes the prototype of ctime_r.
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396 It is zero if d_ctime_r is undef, and one of the
397 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
398 is defined.
10bc17b6 399
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400d__fwalk (d__fwalk.U):
401 This variable conditionally defines HAS__FWALK if _fwalk() is
402 available to apply a function to all the file handles.
403
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404d_access (d_access.U):
405 This variable conditionally defines HAS_ACCESS if the access() system
406 call is available to check for access permissions using real IDs.
407
408d_accessx (d_accessx.U):
409 This variable conditionally defines the HAS_ACCESSX symbol, which
410 indicates to the C program that the accessx() routine is available.
411
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412d_aintl (d_aintl.U):
413 This variable conditionally defines the HAS_AINTL symbol, which
414 indicates to the C program that the aintl() routine is available.
415 If copysignl is also present we can emulate modfl.
416
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417d_alarm (d_alarm.U):
418 This variable conditionally defines the HAS_ALARM symbol, which
419 indicates to the C program that the alarm() routine is available.
420
421d_archlib (archlib.U):
422 This variable conditionally defines ARCHLIB to hold the pathname
423 of architecture-dependent library files for $package. If
424 $archlib is the same as $privlib, then this is set to undef.
425
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426d_asctime64 (d_timefuncs64.U):
427 This variable conditionally defines the HAS_ASCTIME64 symbol, which
428 indicates to the C program that the asctime64 () routine is available.
429
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430d_asctime_r (d_asctime_r.U):
431 This variable conditionally defines the HAS_ASCTIME_R symbol,
432 which indicates to the C program that the asctime_r()
433 routine is available.
434
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435d_atolf (atolf.U):
436 This variable conditionally defines the HAS_ATOLF symbol, which
437 indicates to the C program that the atolf() routine is available.
438
439d_atoll (atoll.U):
440 This variable conditionally defines the HAS_ATOLL symbol, which
441 indicates to the C program that the atoll() routine is available.
442
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443d_attribute_deprecated (d_attribut.U):
444 This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
445 indicates that GCC can handle the attribute for marking deprecated
446 APIs
447
df4c34dc 448d_attribute_format (d_attribut.U):
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449 This variable conditionally defines HASATTRIBUTE_FORMAT, which
450 indicates the C compiler can check for printf-like formats.
451
df4c34dc 452d_attribute_malloc (d_attribut.U):
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453 This variable conditionally defines HASATTRIBUTE_MALLOC, which
454 indicates the C compiler can understand functions as having
455 malloc-like semantics.
456
df4c34dc 457d_attribute_nonnull (d_attribut.U):
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458 This variable conditionally defines HASATTRIBUTE_NONNULL, which
459 indicates that the C compiler can know that certain arguments
460 must not be NULL, and will check accordingly at compile time.
461
df4c34dc 462d_attribute_noreturn (d_attribut.U):
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463 This variable conditionally defines HASATTRIBUTE_NORETURN, which
464 indicates that the C compiler can know that certain functions
465 are guaranteed never to return.
466
df4c34dc 467d_attribute_pure (d_attribut.U):
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468 This variable conditionally defines HASATTRIBUTE_PURE, which
469 indicates that the C compiler can know that certain functions
470 are "pure" functions, meaning that they have no side effects, and
471 only rely on function input and/or global data for their results.
472
df4c34dc 473d_attribute_unused (d_attribut.U):
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474 This variable conditionally defines HASATTRIBUTE_UNUSED, which
475 indicates that the C compiler can know that certain variables
476 and arguments may not always be used, and to not throw warnings
477 if they don't get used.
478
df4c34dc 479d_attribute_warn_unused_result (d_attribut.U):
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480 This variable conditionally defines
481 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
482 compiler can know that certain functions have a return values
483 that must not be ignored, such as malloc() or open().
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484
485d_bcmp (d_bcmp.U):
486 This variable conditionally defines the HAS_BCMP symbol if
487 the bcmp() routine is available to compare strings.
488
489d_bcopy (d_bcopy.U):
490 This variable conditionally defines the HAS_BCOPY symbol if
491 the bcopy() routine is available to copy strings.
492
493d_bsd (Guess.U):
494 This symbol conditionally defines the symbol BSD when running on a
495 BSD system.
496
497d_bsdgetpgrp (d_getpgrp.U):
498 This variable conditionally defines USE_BSD_GETPGRP if
499 getpgrp needs one arguments whereas USG one needs none.
500
501d_bsdsetpgrp (d_setpgrp.U):
502 This variable conditionally defines USE_BSD_SETPGRP if
503 setpgrp needs two arguments whereas USG one needs none.
504 See also d_setpgid for a POSIX interface.
505
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506d_builtin_choose_expr (d_builtin.U):
507 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
508 indicates that the compiler supports __builtin_choose_expr(x,y,z).
509 This built-in function is analogous to the "x?y:z" operator in C,
510 except that the expression returned has its type unaltered by
511 promotion rules. Also, the built-in function does not evaluate
512 the expression that was not chosen.
513
514d_builtin_expect (d_builtin.U):
515 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
516 that the compiler supports __builtin_expect(exp,c). You may use
517 __builtin_expect to provide the compiler with branch prediction
518 information.
519
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520d_bzero (d_bzero.U):
521 This variable conditionally defines the HAS_BZERO symbol if
522 the bzero() routine is available to set memory to 0.
523
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524d_c99_variadic_macros (d_c99_variadic.U):
525 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
526 symbol, which indicates to the C program that C99 variadic macros
527 are available.
528
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529d_casti32 (d_casti32.U):
530 This variable conditionally defines CASTI32, which indicates
531 whether the C compiler can cast large floats to 32-bit ints.
532
533d_castneg (d_castneg.U):
534 This variable conditionally defines CASTNEG, which indicates
47e01c32 535 whether the C compiler can cast negative float to unsigned.
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536
537d_charvspr (d_vprintf.U):
538 This variable conditionally defines CHARVSPRINTF if this system
539 has vsprintf returning type (char*). The trend seems to be to
540 declare it as "int vsprintf()".
541
542d_chown (d_chown.U):
543 This variable conditionally defines the HAS_CHOWN symbol, which
544 indicates to the C program that the chown() routine is available.
545
546d_chroot (d_chroot.U):
547 This variable conditionally defines the HAS_CHROOT symbol, which
548 indicates to the C program that the chroot() routine is available.
549
550d_chsize (d_chsize.U):
551 This variable conditionally defines the CHSIZE symbol, which
552 indicates to the C program that the chsize() routine is available
553 to truncate files. You might need a -lx to get this routine.
554
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555d_class (d_class.U):
556 This variable conditionally defines the HAS_CLASS symbol, which
557 indicates to the C program that the class() routine is available.
558
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559d_clearenv (d_clearenv.U):
560 This variable conditionally defines the HAS_CLEARENV symbol, which
561 indicates to the C program that the clearenv () routine is available.
562
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563d_closedir (d_closedir.U):
564 This variable conditionally defines HAS_CLOSEDIR if closedir() is
565 available.
566
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567d_cmsghdr_s (d_cmsghdr_s.U):
568 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
569 which indicates that the struct cmsghdr is supported.
570
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571d_const (d_const.U):
572 This variable conditionally defines the HASCONST symbol, which
573 indicates to the C program that this C compiler knows about the
574 const type.
575
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576d_copysignl (d_copysignl.U):
577 This variable conditionally defines the HAS_COPYSIGNL symbol, which
578 indicates to the C program that the copysignl() routine is available.
579 If aintl is also present we can emulate modfl.
580
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581d_cplusplus (d_cplusplus.U):
582 This variable conditionally defines the USE_CPLUSPLUS symbol, which
583 indicates that a C++ compiler was used to compiled Perl and will be
584 used to compile extensions.
585
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586d_crypt (d_crypt.U):
587 This variable conditionally defines the CRYPT symbol, which
588 indicates to the C program that the crypt() routine is available
589 to encrypt passwords and the like.
590
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591d_crypt_r (d_crypt_r.U):
592 This variable conditionally defines the HAS_CRYPT_R symbol,
593 which indicates to the C program that the crypt_r()
594 routine is available.
595
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596d_csh (d_csh.U):
597 This variable conditionally defines the CSH symbol, which
598 indicates to the C program that the C-shell exists.
599
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600d_ctermid (d_ctermid.U):
601 This variable conditionally defines CTERMID if ctermid() is
602 available to generate filename for terminal.
603
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604d_ctermid_r (d_ctermid_r.U):
605 This variable conditionally defines the HAS_CTERMID_R symbol,
606 which indicates to the C program that the ctermid_r()
607 routine is available.
608
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609d_ctime64 (d_timefuncs64.U):
610 This variable conditionally defines the HAS_CTIME64 symbol, which
611 indicates to the C program that the ctime64 () routine is available.
612
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613d_ctime_r (d_ctime_r.U):
614 This variable conditionally defines the HAS_CTIME_R symbol,
615 which indicates to the C program that the ctime_r()
616 routine is available.
617
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618d_cuserid (d_cuserid.U):
619 This variable conditionally defines the HAS_CUSERID symbol, which
620 indicates to the C program that the cuserid() routine is available
621 to get character login names.
622
623d_dbl_dig (d_dbl_dig.U):
624 This variable conditionally defines d_dbl_dig if this system's
625 header files provide DBL_DIG, which is the number of significant
626 digits in a double precision number.
627
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628d_dbminitproto (d_dbminitproto.U):
629 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
630 which indicates to the C program that the system provides
631 a prototype for the dbminit() function. Otherwise, it is
632 up to the program to supply one.
633
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634d_difftime (d_difftime.U):
635 This variable conditionally defines the HAS_DIFFTIME symbol, which
636 indicates to the C program that the difftime() routine is available.
637
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638d_difftime64 (d_timefuncs64.U):
639 This variable conditionally defines the HAS_DIFFTIME64 symbol, which
640 indicates to the C program that the difftime64 () routine is available.
641
066e7355 642d_dir_dd_fd (d_dir_dd_fd.U):
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643 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
644 indicates that the DIR directory stream type contains a member
645 variable called dd_fd.
646
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647d_dirfd (d_dirfd.U):
648 This variable conditionally defines the HAS_DIRFD constant,
649 which indicates to the C program that dirfd() is available
650 to return the file descriptor of a directory stream.
651
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652d_dirnamlen (i_dirent.U):
653 This variable conditionally defines DIRNAMLEN, which indicates
654 to the C program that the length of directory entry names is
655 provided by a d_namelen field.
656
657d_dlerror (d_dlerror.U):
658 This variable conditionally defines the HAS_DLERROR symbol, which
659 indicates to the C program that the dlerror() routine is available.
660
661d_dlopen (d_dlopen.U):
662 This variable conditionally defines the HAS_DLOPEN symbol, which
663 indicates to the C program that the dlopen() routine is available.
664
665d_dlsymun (d_dlsymun.U):
666 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
667 indicates that we need to prepend an underscore to the symbol
668 name before calling dlsym().
669
670d_dosuid (d_dosuid.U):
671 This variable conditionally defines the symbol DOSUID, which
672 tells the C program that it should insert setuid emulation code
673 on hosts which have setuid #! scripts disabled.
674
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675d_drand48_r (d_drand48_r.U):
676 This variable conditionally defines the HAS_DRAND48_R symbol,
677 which indicates to the C program that the drand48_r()
678 routine is available.
679
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680d_drand48proto (d_drand48proto.U):
681 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
682 which indicates to the C program that the system provides
683 a prototype for the drand48() function. Otherwise, it is
684 up to the program to supply one.
685
686d_dup2 (d_dup2.U):
687 This variable conditionally defines HAS_DUP2 if dup2() is
688 available to duplicate file descriptors.
689
690d_eaccess (d_eaccess.U):
691 This variable conditionally defines the HAS_EACCESS symbol, which
692 indicates to the C program that the eaccess() routine is available.
693
694d_endgrent (d_endgrent.U):
695 This variable conditionally defines the HAS_ENDGRENT symbol, which
696 indicates to the C program that the endgrent() routine is available
697 for sequential access of the group database.
698
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699d_endgrent_r (d_endgrent_r.U):
700 This variable conditionally defines the HAS_ENDGRENT_R symbol,
701 which indicates to the C program that the endgrent_r()
702 routine is available.
703
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704d_endhent (d_endhent.U):
705 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
706 available to close whatever was being used for host queries.
707
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708d_endhostent_r (d_endhostent_r.U):
709 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
710 which indicates to the C program that the endhostent_r()
711 routine is available.
712
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713d_endnent (d_endnent.U):
714 This variable conditionally defines HAS_ENDNETENT if endnetent() is
715 available to close whatever was being used for network queries.
716
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717d_endnetent_r (d_endnetent_r.U):
718 This variable conditionally defines the HAS_ENDNETENT_R symbol,
719 which indicates to the C program that the endnetent_r()
720 routine is available.
721
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722d_endpent (d_endpent.U):
723 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
724 available to close whatever was being used for protocol queries.
725
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726d_endprotoent_r (d_endprotoent_r.U):
727 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
728 which indicates to the C program that the endprotoent_r()
729 routine is available.
730
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731d_endpwent (d_endpwent.U):
732 This variable conditionally defines the HAS_ENDPWENT symbol, which
733 indicates to the C program that the endpwent() routine is available
734 for sequential access of the passwd database.
735
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736d_endpwent_r (d_endpwent_r.U):
737 This variable conditionally defines the HAS_ENDPWENT_R symbol,
738 which indicates to the C program that the endpwent_r()
739 routine is available.
740
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741d_endsent (d_endsent.U):
742 This variable conditionally defines HAS_ENDSERVENT if endservent() is
743 available to close whatever was being used for service queries.
744
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745d_endservent_r (d_endservent_r.U):
746 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
747 which indicates to the C program that the endservent_r()
748 routine is available.
749
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750d_eofnblk (nblock_io.U):
751 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
752 when reading from a non-blocking I/O source.
753
754d_eunice (Guess.U):
755 This variable conditionally defines the symbols EUNICE and VAX, which
47e01c32 756 alerts the C program that it must deal with idiosyncrasies of VMS.
781b178c 757
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758d_faststdio (d_faststdio.U):
759 This variable conditionally defines the HAS_FAST_STDIO symbol,
760 which indicates to the C program that the "fast stdio" is available
761 to manipulate the stdio buffers directly.
762
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763d_fchdir (d_fchdir.U):
764 This variable conditionally defines the HAS_FCHDIR symbol, which
765 indicates to the C program that the fchdir() routine is available.
766
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767d_fchmod (d_fchmod.U):
768 This variable conditionally defines the HAS_FCHMOD symbol, which
769 indicates to the C program that the fchmod() routine is available
770 to change mode of opened files.
771
772d_fchown (d_fchown.U):
773 This variable conditionally defines the HAS_FCHOWN symbol, which
774 indicates to the C program that the fchown() routine is available
775 to change ownership of opened files.
776
777d_fcntl (d_fcntl.U):
778 This variable conditionally defines the HAS_FCNTL symbol, and indicates
779 whether the fcntl() function exists
780
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AD
781d_fcntl_can_lock (d_fcntl_can_lock.U):
782 This variable conditionally defines the FCNTL_CAN_LOCK symbol
783 and indicates whether file locking with fcntl() works.
784
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785d_fd_macros (d_fd_set.U):
786 This variable contains the eventual value of the HAS_FD_MACROS symbol,
787 which indicates if your C compiler knows about the macros which
788 manipulate an fd_set.
789
790d_fd_set (d_fd_set.U):
791 This variable contains the eventual value of the HAS_FD_SET symbol,
792 which indicates if your C compiler knows about the fd_set typedef.
793
794d_fds_bits (d_fd_set.U):
795 This variable contains the eventual value of the HAS_FDS_BITS symbol,
796 which indicates if your fd_set typedef contains the fds_bits member.
797 If you have an fd_set typedef, but the dweebs who installed it did
798 a half-fast job and neglected to provide the macros to manipulate
799 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
800
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801d_fgetpos (d_fgetpos.U):
802 This variable conditionally defines HAS_FGETPOS if fgetpos() is
803 available to get the file position indicator.
804
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805d_finite (d_finite.U):
806 This variable conditionally defines the HAS_FINITE symbol, which
807 indicates to the C program that the finite() routine is available.
808
809d_finitel (d_finitel.U):
810 This variable conditionally defines the HAS_FINITEL symbol, which
811 indicates to the C program that the finitel() routine is available.
812
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813d_flexfnam (d_flexfnam.U):
814 This variable conditionally defines the FLEXFILENAMES symbol, which
815 indicates that the system supports filenames longer than 14 characters.
816
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817d_flock (d_flock.U):
818 This variable conditionally defines HAS_FLOCK if flock() is
819 available to do file locking.
820
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821d_flockproto (d_flockproto.U):
822 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
823 which indicates to the C program that the system provides
824 a prototype for the flock() function. Otherwise, it is
825 up to the program to supply one.
826
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827d_fork (d_fork.U):
828 This variable conditionally defines the HAS_FORK symbol, which
829 indicates to the C program that the fork() routine is available.
830
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831d_fp_class (d_fp_class.U):
832 This variable conditionally defines the HAS_FP_CLASS symbol, which
833 indicates to the C program that the fp_class() routine is available.
834
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835d_fpathconf (d_pathconf.U):
836 This variable conditionally defines the HAS_FPATHCONF symbol, which
837 indicates to the C program that the pathconf() routine is available
838 to determine file-system related limits and options associated
839 with a given open file descriptor.
840
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841d_fpclass (d_fpclass.U):
842 This variable conditionally defines the HAS_FPCLASS symbol, which
843 indicates to the C program that the fpclass() routine is available.
844
845d_fpclassify (d_fpclassify.U):
846 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
847 indicates to the C program that the fpclassify() routine is available.
848
849d_fpclassl (d_fpclassl.U):
850 This variable conditionally defines the HAS_FPCLASSL symbol, which
851 indicates to the C program that the fpclassl() routine is available.
852
c890dc6c 853d_fpos64_t (d_fpos64_t.U):
ca24dfc6 854 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 855
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856d_frexpl (d_frexpl.U):
857 This variable conditionally defines the HAS_FREXPL symbol, which
858 indicates to the C program that the frexpl() routine is available.
859
ad27e871 860d_fs_data_s (d_fs_data_s.U):
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JH
861 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
862 which indicates that the struct fs_data is supported.
863
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864d_fseeko (d_fseeko.U):
865 This variable conditionally defines the HAS_FSEEKO symbol, which
866 indicates to the C program that the fseeko() routine is available.
867
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868d_fsetpos (d_fsetpos.U):
869 This variable conditionally defines HAS_FSETPOS if fsetpos() is
870 available to set the file position indicator.
871
0545a864 872d_fstatfs (d_fstatfs.U):
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873 This variable conditionally defines the HAS_FSTATFS symbol, which
874 indicates to the C program that the fstatfs() routine is available.
875
876d_fstatvfs (d_statvfs.U):
877 This variable conditionally defines the HAS_FSTATVFS symbol, which
878 indicates to the C program that the fstatvfs() routine is available.
879
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880d_fsync (d_fsync.U):
881 This variable conditionally defines the HAS_FSYNC symbol, which
882 indicates to the C program that the fsync() routine is available.
883
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884d_ftello (d_ftello.U):
885 This variable conditionally defines the HAS_FTELLO symbol, which
886 indicates to the C program that the ftello() routine is available.
887
888d_ftime (d_ftime.U):
889 This variable conditionally defines the HAS_FTIME symbol, which indicates
890 that the ftime() routine exists. The ftime() routine is basically
891 a sub-second accuracy clock.
892
df4c34dc 893d_futimes (d_futimes.U):
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894 This variable conditionally defines the HAS_FUTIMES symbol, which
895 indicates to the C program that the futimes() routine is available.
896
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897d_Gconvert (d_gconvert.U):
898 This variable holds what Gconvert is defined as to convert
899 floating point numbers into strings. By default, Configure
900 sets this macro to use the first of gconvert, gcvt, or sprintf
1332606d 901 that pass sprintf-%g-like behavior tests. If perl is using
4d54317a
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902 long doubles, the macro uses the first of the following
903 functions that pass Configure's tests: qgcvt, sprintf (if
904 Configure knows how to make sprintf format long doubles--see
635aebb7
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905 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
906 The gconvert_preference and gconvert_ld_preference variables
4d54317a 907 can be used to alter Configure's preferences, for doubles and
635aebb7
AL
908 long doubles, respectively. If present, they contain a
909 space-separated list of one or more of the above function
4d54317a
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910 names in the order they should be tried.
911
912 d_Gconvert may be set to override Configure with a platform-
913 specific function. If this function expects a double, a
914 different value may need to be set by the uselongdouble.cbu
915 call-back unit so that long doubles can be formatted without
916 loss of precision.
917
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918d_gdbm_ndbm_h_uses_prototypes (i_ndbm.U):
919 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
920 which indicates that the gdbm-ndbm.h include file uses real ANSI C
921 prototypes instead of K&R style function declarations. K&R style
922 declarations are unsupported in C++, so the include file requires
923 special handling when using a C++ compiler and this variable is
924 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
925 to get the same information for alternative ndbm.h include files.
926
927d_gdbmndbm_h_uses_prototypes (i_ndbm.U):
928 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
929 which indicates that the gdbm/ndbm.h include file uses real ANSI C
930 prototypes instead of K&R style function declarations. K&R style
931 declarations are unsupported in C++, so the include file requires
932 special handling when using a C++ compiler and this variable is
933 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
934 to get the same information for alternative ndbm.h include files.
935
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936d_getaddrinfo (d_getaddrinfo.U):
937 This variable conditionally defines the HAS_GETADDRINFO symbol,
938 which indicates to the C program that the getaddrinfo() function
939 is available.
940
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941d_getcwd (d_getcwd.U):
942 This variable conditionally defines the HAS_GETCWD symbol, which
943 indicates to the C program that the getcwd() routine is available
944 to get the current working directory.
945
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946d_getespwnam (d_getespwnam.U):
947 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
47e01c32 948 available to retrieve enhanced (shadow) password entries by name.
3813c136 949
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950d_getfsstat (d_getfsstat.U):
951 This variable conditionally defines the HAS_GETFSSTAT symbol, which
952 indicates to the C program that the getfsstat() routine is available.
953
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954d_getgrent (d_getgrent.U):
955 This variable conditionally defines the HAS_GETGRENT symbol, which
956 indicates to the C program that the getgrent() routine is available
957 for sequential access of the group database.
958
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959d_getgrent_r (d_getgrent_r.U):
960 This variable conditionally defines the HAS_GETGRENT_R symbol,
961 which indicates to the C program that the getgrent_r()
962 routine is available.
963
964d_getgrgid_r (d_getgrgid_r.U):
965 This variable conditionally defines the HAS_GETGRGID_R symbol,
966 which indicates to the C program that the getgrgid_r()
967 routine is available.
968
969d_getgrnam_r (d_getgrnam_r.U):
970 This variable conditionally defines the HAS_GETGRNAM_R symbol,
971 which indicates to the C program that the getgrnam_r()
972 routine is available.
973
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974d_getgrps (d_getgrps.U):
975 This variable conditionally defines the HAS_GETGROUPS symbol, which
976 indicates to the C program that the getgroups() routine is available
977 to get the list of process groups.
978
979d_gethbyaddr (d_gethbyad.U):
980 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
981 indicates to the C program that the gethostbyaddr() routine is available
982 to look up hosts by their IP addresses.
983
984d_gethbyname (d_gethbynm.U):
985 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
986 indicates to the C program that the gethostbyname() routine is available
987 to look up host names in some data base or other.
988
989d_gethent (d_gethent.U):
990 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
991 available to look up host names in some data base or another.
992
993d_gethname (d_gethname.U):
994 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
995 indicates to the C program that the gethostname() routine may be
996 used to derive the host name.
997
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998d_gethostbyaddr_r (d_gethostbyaddr_r.U):
999 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
1000 which indicates to the C program that the gethostbyaddr_r()
1001 routine is available.
1002
1003d_gethostbyname_r (d_gethostbyname_r.U):
1004 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
1005 which indicates to the C program that the gethostbyname_r()
1006 routine is available.
1007
1008d_gethostent_r (d_gethostent_r.U):
1009 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
1010 which indicates to the C program that the gethostent_r()
1011 routine is available.
1012
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1013d_gethostprotos (d_gethostprotos.U):
1014 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
1015 which indicates to the C program that <netdb.h> supplies
635aebb7 1016 prototypes for the various gethost*() functions.
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1017 See also netdbtype.U for probing for various netdb types.
1018
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1019d_getitimer (d_getitimer.U):
1020 This variable conditionally defines the HAS_GETITIMER symbol, which
1021 indicates to the C program that the getitimer() routine is available.
1022
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1023d_getlogin (d_getlogin.U):
1024 This variable conditionally defines the HAS_GETLOGIN symbol, which
1025 indicates to the C program that the getlogin() routine is available
1026 to get the login name.
1027
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1028d_getlogin_r (d_getlogin_r.U):
1029 This variable conditionally defines the HAS_GETLOGIN_R symbol,
1030 which indicates to the C program that the getlogin_r()
1031 routine is available.
1032
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1033d_getmnt (d_getmnt.U):
1034 This variable conditionally defines the HAS_GETMNT symbol, which
1035 indicates to the C program that the getmnt() routine is available
1036 to retrieve one or more mount info blocks by filename.
1037
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1038d_getmntent (d_getmntent.U):
1039 This variable conditionally defines the HAS_GETMNTENT symbol, which
1040 indicates to the C program that the getmntent() routine is available
0617aed7 1041 to iterate through mounted files to get their mount info.
781b178c 1042
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1043d_getnameinfo (d_getnameinfo.U):
1044 This variable conditionally defines the HAS_GETNAMEINFO symbol,
1045 which indicates to the C program that the getnameinfo() function
1046 is available.
1047
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1048d_getnbyaddr (d_getnbyad.U):
1049 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
1050 indicates to the C program that the getnetbyaddr() routine is available
1051 to look up networks by their IP addresses.
1052
1053d_getnbyname (d_getnbynm.U):
1054 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
1055 indicates to the C program that the getnetbyname() routine is available
1056 to look up networks by their names.
1057
1058d_getnent (d_getnent.U):
1059 This variable conditionally defines HAS_GETNETENT if getnetent() is
1060 available to look up network names in some data base or another.
1061
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1062d_getnetbyaddr_r (d_getnetbyaddr_r.U):
1063 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
1064 which indicates to the C program that the getnetbyaddr_r()
1065 routine is available.
1066
1067d_getnetbyname_r (d_getnetbyname_r.U):
1068 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
1069 which indicates to the C program that the getnetbyname_r()
1070 routine is available.
1071
1072d_getnetent_r (d_getnetent_r.U):
1073 This variable conditionally defines the HAS_GETNETENT_R symbol,
1074 which indicates to the C program that the getnetent_r()
1075 routine is available.
1076
781b178c
JH
1077d_getnetprotos (d_getnetprotos.U):
1078 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1079 which indicates to the C program that <netdb.h> supplies
635aebb7 1080 prototypes for the various getnet*() functions.
781b178c
JH
1081 See also netdbtype.U for probing for various netdb types.
1082
0c0643d0
JH
1083d_getpagsz (d_getpagsz.U):
1084 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1085 is available to get the system page size.
1086
781b178c 1087d_getpbyname (d_getprotby.U):
635aebb7
AL
1088 This variable conditionally defines the HAS_GETPROTOBYNAME
1089 symbol, which indicates to the C program that the
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JH
1090 getprotobyname() routine is available to look up protocols
1091 by their name.
1092
1093d_getpbynumber (d_getprotby.U):
635aebb7
AL
1094 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1095 symbol, which indicates to the C program that the
781b178c
JH
1096 getprotobynumber() routine is available to look up protocols
1097 by their number.
1098
1099d_getpent (d_getpent.U):
1100 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1101 available to look up protocols in some data base or another.
1102
1103d_getpgid (d_getpgid.U):
1104 This variable conditionally defines the HAS_GETPGID symbol, which
1105 indicates to the C program that the getpgid(pid) function
1106 is available to get the process group id.
1107
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MB
1108d_getpgrp (d_getpgrp.U):
1109 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1110 available to get the current process group.
1111
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JH
1112d_getpgrp2 (d_getpgrp2.U):
1113 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1114 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1115 is available to get the current process group.
1116
781b178c
JH
1117d_getppid (d_getppid.U):
1118 This variable conditionally defines the HAS_GETPPID symbol, which
1119 indicates to the C program that the getppid() routine is available
1120 to get the parent process ID.
1121
1122d_getprior (d_getprior.U):
1123 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1124 is available to get a process's priority.
1125
10bc17b6
JH
1126d_getprotobyname_r (d_getprotobyname_r.U):
1127 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1128 which indicates to the C program that the getprotobyname_r()
1129 routine is available.
1130
1131d_getprotobynumber_r (d_getprotobynumber_r.U):
1132 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1133 which indicates to the C program that the getprotobynumber_r()
1134 routine is available.
1135
1136d_getprotoent_r (d_getprotoent_r.U):
1137 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1138 which indicates to the C program that the getprotoent_r()
1139 routine is available.
1140
781b178c
JH
1141d_getprotoprotos (d_getprotoprotos.U):
1142 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1143 which indicates to the C program that <netdb.h> supplies
635aebb7 1144 prototypes for the various getproto*() functions.
781b178c
JH
1145 See also netdbtype.U for probing for various netdb types.
1146
3813c136
JH
1147d_getprpwnam (d_getprpwnam.U):
1148 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1149 available to retrieve protected (shadow) password entries by name.
1150
781b178c
JH
1151d_getpwent (d_getpwent.U):
1152 This variable conditionally defines the HAS_GETPWENT symbol, which
1153 indicates to the C program that the getpwent() routine is available
1154 for sequential access of the passwd database.
1155
10bc17b6
JH
1156d_getpwent_r (d_getpwent_r.U):
1157 This variable conditionally defines the HAS_GETPWENT_R symbol,
1158 which indicates to the C program that the getpwent_r()
1159 routine is available.
1160
1161d_getpwnam_r (d_getpwnam_r.U):
1162 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1163 which indicates to the C program that the getpwnam_r()
1164 routine is available.
1165
1166d_getpwuid_r (d_getpwuid_r.U):
1167 This variable conditionally defines the HAS_GETPWUID_R symbol,
1168 which indicates to the C program that the getpwuid_r()
1169 routine is available.
1170
781b178c 1171d_getsbyname (d_getsrvby.U):
635aebb7
AL
1172 This variable conditionally defines the HAS_GETSERVBYNAME
1173 symbol, which indicates to the C program that the
781b178c
JH
1174 getservbyname() routine is available to look up services
1175 by their name.
1176
1177d_getsbyport (d_getsrvby.U):
635aebb7
AL
1178 This variable conditionally defines the HAS_GETSERVBYPORT
1179 symbol, which indicates to the C program that the
781b178c
JH
1180 getservbyport() routine is available to look up services
1181 by their port.
1182
1183d_getsent (d_getsent.U):
1184 This variable conditionally defines HAS_GETSERVENT if getservent() is
1185 available to look up network services in some data base or another.
1186
10bc17b6
JH
1187d_getservbyname_r (d_getservbyname_r.U):
1188 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1189 which indicates to the C program that the getservbyname_r()
1190 routine is available.
1191
1192d_getservbyport_r (d_getservbyport_r.U):
1193 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1194 which indicates to the C program that the getservbyport_r()
1195 routine is available.
1196
1197d_getservent_r (d_getservent_r.U):
1198 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1199 which indicates to the C program that the getservent_r()
1200 routine is available.
1201
781b178c
JH
1202d_getservprotos (d_getservprotos.U):
1203 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1204 which indicates to the C program that <netdb.h> supplies
635aebb7 1205 prototypes for the various getserv*() functions.
781b178c
JH
1206 See also netdbtype.U for probing for various netdb types.
1207
781b178c
JH
1208d_getspnam (d_getspnam.U):
1209 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1210 available to retrieve SysV shadow password entries by name.
1211
10bc17b6
JH
1212d_getspnam_r (d_getspnam_r.U):
1213 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1214 which indicates to the C program that the getspnam_r()
1215 routine is available.
1216
781b178c
JH
1217d_gettimeod (d_ftime.U):
1218 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1219 indicates that the gettimeofday() system call exists (to obtain a
1220 sub-second accuracy clock). You should probably include <sys/resource.h>.
1221
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MB
1222d_gmtime64 (d_timefuncs64.U):
1223 This variable conditionally defines the HAS_GMTIME64 symbol, which
1224 indicates to the C program that the gmtime64 () routine is available.
1225
10bc17b6
JH
1226d_gmtime_r (d_gmtime_r.U):
1227 This variable conditionally defines the HAS_GMTIME_R symbol,
1228 which indicates to the C program that the gmtime_r()
1229 routine is available.
1230
781b178c
JH
1231d_gnulibc (d_gnulibc.U):
1232 Defined if we're dealing with the GNU C Library.
1233
1234d_grpasswd (i_grp.U):
1235 This variable conditionally defines GRPASSWD, which indicates
1236 that struct group in <grp.h> contains gr_passwd.
1237
1238d_hasmntopt (d_hasmntopt.U):
1239 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1240 indicates to the C program that the hasmntopt() routine is available
1241 to query the mount options of file systems.
1242
1243d_htonl (d_htonl.U):
1244 This variable conditionally defines HAS_HTONL if htonl() and its
1245 friends are available to do network order byte swapping.
1246
5c567d7d
JH
1247d_ilogbl (d_ilogbl.U):
1248 This variable conditionally defines the HAS_ILOGBL symbol, which
1249 indicates to the C program that the ilogbl() routine is available.
1250 If scalbnl is also present we can emulate frexpl.
1251
c95d0e17
GA
1252d_inc_version_list (inc_version_list.U):
1253 This variable conditionally defines PERL_INC_VERSION_LIST.
1254 It is set to undef when PERL_INC_VERSION_LIST is empty.
1255
781b178c
JH
1256d_index (d_strchr.U):
1257 This variable conditionally defines HAS_INDEX if index() and
1258 rindex() are available for string searching.
1259
1260d_inetaton (d_inetaton.U):
1261 This variable conditionally defines the HAS_INET_ATON symbol, which
1262 indicates to the C program that the inet_aton() function is available
1263 to parse IP address "dotted-quad" strings.
1264
5086dff9
MB
1265d_inetntop (d_inetntop.U):
1266 This variable conditionally defines the HAS_INETNTOP symbol,
1267 which indicates to the C program that the inet_ntop() function
1268 is available.
1269
1270d_inetpton (d_inetpton.U):
1271 This variable conditionally defines the HAS_INETPTON symbol,
1272 which indicates to the C program that the inet_pton() function
1273 is available.
1274
13b3f787 1275d_int64_t (d_int64_t.U):
781b178c
JH
1276 This symbol will be defined if the C compiler supports int64_t.
1277
122b9bf4
MB
1278d_ip_mreq (d_socket.U):
1279 This variable conditionally defines the HAS_IP_MREQ symbol, which
1280 indicates the availability of a struct ip_mreq.
1281
3e06601f
MB
1282d_ip_mreq_source (d_socket.U):
1283 This variable conditionally defines the HAS_IP_MREQ_SOURCE symbol,
1284 which indicates the availability of a struct ip_mreq_source.
1285
18126d98
MB
1286d_ipv6_mreq (d_socket.U):
1287 This variable conditionally defines the HAS_IPV6_MREQ symbol, which
1288 indicates the availability of a struct ipv6_mreq.
1289
3e06601f
MB
1290d_ipv6_mreq_source (d_socket.U):
1291 This variable conditionally defines the HAS_IPV6_MREQ_SOURCE symbol,
1292 which indicates the availability of a struct ipv6_mreq_source.
1293
781b178c
JH
1294d_isascii (d_isascii.U):
1295 This variable conditionally defines the HAS_ISASCII constant,
1296 which indicates to the C program that isascii() is available.
1297
269a7913
MB
1298d_isblank (d_isblank.U):
1299 This variable conditionally defines the HAS_ISBLANK constant,
1300 which indicates to the C program that isblank() is available.
1301
758a5d79
JH
1302d_isfinite (d_isfinite.U):
1303 This variable conditionally defines the HAS_ISFINITE symbol, which
1304 indicates to the C program that the isfinite() routine is available.
1305
1306d_isinf (d_isinf.U):
1307 This variable conditionally defines the HAS_ISINF symbol, which
1308 indicates to the C program that the isinf() routine is available.
1309
a3540c92
JH
1310d_isnan (d_isnan.U):
1311 This variable conditionally defines the HAS_ISNAN symbol, which
1312 indicates to the C program that the isnan() routine is available.
1313
1314d_isnanl (d_isnanl.U):
1315 This variable conditionally defines the HAS_ISNANL symbol, which
1316 indicates to the C program that the isnanl() routine is available.
1317
781b178c
JH
1318d_killpg (d_killpg.U):
1319 This variable conditionally defines the HAS_KILLPG symbol, which
1320 indicates to the C program that the killpg() routine is available
1321 to kill process groups.
1322
1323d_lchown (d_lchown.U):
1324 This variable conditionally defines the HAS_LCHOWN symbol, which
1325 indicates to the C program that the lchown() routine is available
1326 to operate on a symbolic link (instead of following the link).
1327
ca24dfc6
LV
1328d_ldbl_dig (d_ldbl_dig.U):
1329 This variable conditionally defines d_ldbl_dig if this system's
1330 header files provide LDBL_DIG, which is the number of significant
1331 digits in a long double precision number.
1332
df4c34dc
MB
1333d_libm_lib_version (d_libm_lib_version.U):
1334 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1335 which indicates to the C program that math.h defines _LIB_VERSION
1336 being available in libm
1337
781b178c
JH
1338d_link (d_link.U):
1339 This variable conditionally defines HAS_LINK if link() is
1340 available to create hard links.
1341
96938616
MB
1342d_localtime64 (d_timefuncs64.U):
1343 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1344 indicates to the C program that the localtime64 () routine is available.
1345
10bc17b6
JH
1346d_localtime_r (d_localtime_r.U):
1347 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1348 which indicates to the C program that the localtime_r()
1349 routine is available.
1350
f025e94b
MB
1351d_localtime_r_needs_tzset (d_localtime_r.U):
1352 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1353 symbol, which makes us call tzset before localtime_r()
1354
781b178c
JH
1355d_locconv (d_locconv.U):
1356 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1357 available for numeric and monetary formatting conventions.
1358
781b178c
JH
1359d_lockf (d_lockf.U):
1360 This variable conditionally defines HAS_LOCKF if lockf() is
1361 available to do file locking.
1362
1363d_longdbl (d_longdbl.U):
635aebb7 1364 This variable conditionally defines HAS_LONG_DOUBLE if
781b178c
JH
1365 the long double type is supported.
1366
1367d_longlong (d_longlong.U):
635aebb7 1368 This variable conditionally defines HAS_LONG_LONG if
781b178c
JH
1369 the long long type is supported.
1370
c890dc6c
JH
1371d_lseekproto (d_lseekproto.U):
1372 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1373 which indicates to the C program that the system provides
1374 a prototype for the lseek() function. Otherwise, it is
1375 up to the program to supply one.
1376
781b178c
JH
1377d_lstat (d_lstat.U):
1378 This variable conditionally defines HAS_LSTAT if lstat() is
1379 available to do file stats on symbolic links.
1380
792d8dab
JH
1381d_madvise (d_madvise.U):
1382 This variable conditionally defines HAS_MADVISE if madvise() is
1383 available to map a file into memory.
1384
df4c34dc
MB
1385d_malloc_good_size (d_malloc_size.U):
1386 This symbol, if defined, indicates that the malloc_good_size
7dd121ae
MB
1387 routine is available for use.
1388
df4c34dc
MB
1389d_malloc_size (d_malloc_size.U):
1390 This symbol, if defined, indicates that the malloc_size
7dd121ae
MB
1391 routine is available for use.
1392
781b178c
JH
1393d_mblen (d_mblen.U):
1394 This variable conditionally defines the HAS_MBLEN symbol, which
1395 indicates to the C program that the mblen() routine is available
1396 to find the number of bytes in a multibye character.
1397
1398d_mbstowcs (d_mbstowcs.U):
1399 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1400 indicates to the C program that the mbstowcs() routine is available
1401 to convert a multibyte string into a wide character string.
1402
1403d_mbtowc (d_mbtowc.U):
1404 This variable conditionally defines the HAS_MBTOWC symbol, which
1405 indicates to the C program that the mbtowc() routine is available
1406 to convert multibyte to a wide character.
1407
1408d_memchr (d_memchr.U):
1409 This variable conditionally defines the HAS_MEMCHR symbol, which
1410 indicates to the C program that the memchr() routine is available
1411 to locate characters within a C string.
1412
1413d_memcmp (d_memcmp.U):
1414 This variable conditionally defines the HAS_MEMCMP symbol, which
1415 indicates to the C program that the memcmp() routine is available
1416 to compare blocks of memory.
1417
1418d_memcpy (d_memcpy.U):
1419 This variable conditionally defines the HAS_MEMCPY symbol, which
1420 indicates to the C program that the memcpy() routine is available
1421 to copy blocks of memory.
1422
1423d_memmove (d_memmove.U):
1424 This variable conditionally defines the HAS_MEMMOVE symbol, which
1425 indicates to the C program that the memmove() routine is available
47e01c32 1426 to copy potentially overlapping blocks of memory.
781b178c
JH
1427
1428d_memset (d_memset.U):
1429 This variable conditionally defines the HAS_MEMSET symbol, which
1430 indicates to the C program that the memset() routine is available
1431 to set blocks of memory.
1432
1433d_mkdir (d_mkdir.U):
1434 This variable conditionally defines the HAS_MKDIR symbol, which
1435 indicates to the C program that the mkdir() routine is available
209e5c0a 1436 to create directories..
781b178c 1437
fe749a9f
JH
1438d_mkdtemp (d_mkdtemp.U):
1439 This variable conditionally defines the HAS_MKDTEMP symbol, which
1440 indicates to the C program that the mkdtemp() routine is available
1441 to exclusively create a uniquely named temporary directory.
1442
781b178c
JH
1443d_mkfifo (d_mkfifo.U):
1444 This variable conditionally defines the HAS_MKFIFO symbol, which
1445 indicates to the C program that the mkfifo() routine is available.
1446
fe749a9f
JH
1447d_mkstemp (d_mkstemp.U):
1448 This variable conditionally defines the HAS_MKSTEMP symbol, which
1449 indicates to the C program that the mkstemp() routine is available
1450 to exclusively create and open a uniquely named temporary file.
1451
1452d_mkstemps (d_mkstemps.U):
1453 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1454 indicates to the C program that the mkstemps() routine is available
1455 to exclusively create and open a uniquely named (with a suffix)
1456 temporary file.
1457
781b178c
JH
1458d_mktime (d_mktime.U):
1459 This variable conditionally defines the HAS_MKTIME symbol, which
1460 indicates to the C program that the mktime() routine is available.
1461
96938616
MB
1462d_mktime64 (d_timefuncs64.U):
1463 This variable conditionally defines the HAS_MKTIME64 symbol, which
1464 indicates to the C program that the mktime64 () routine is available.
1465
fe749a9f
JH
1466d_mmap (d_mmap.U):
1467 This variable conditionally defines HAS_MMAP if mmap() is
1468 available to map a file into memory.
1469
a3540c92
JH
1470d_modfl (d_modfl.U):
1471 This variable conditionally defines the HAS_MODFL symbol, which
1472 indicates to the C program that the modfl() routine is available.
1473
e67aeab1
JH
1474d_modfl_pow32_bug (d_modfl.U):
1475 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1476 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1477 For example from 4294967303.150000 one would get 4294967302.000000
1478 and 1.150000. The bug has been seen in certain versions of glibc,
1479 release 2.2.2 is known to be okay.
1480
44b94491
MB
1481d_modflproto (d_modfl.U):
1482 This symbol, if defined, indicates that the system provides
1483 a prototype for the modfl() function. Otherwise, it is up
1484 to the program to supply one. C99 says it should be
1485 long double modfl(long double, long double *);
1486
fe749a9f
JH
1487d_mprotect (d_mprotect.U):
1488 This variable conditionally defines HAS_MPROTECT if mprotect() is
1489 available to modify the access protection of a memory mapped file.
1490
781b178c
JH
1491d_msg (d_msg.U):
1492 This variable conditionally defines the HAS_MSG symbol, which
1493 indicates that the entire msg*(2) library is present.
1494
1495d_msg_ctrunc (d_socket.U):
1496 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1497 which indicates that the MSG_CTRUNC is available. #ifdef is
1498 not enough because it may be an enum, glibc has been known to do this.
1499
1500d_msg_dontroute (d_socket.U):
1501 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1502 which indicates that the MSG_DONTROUTE is available. #ifdef is
1503 not enough because it may be an enum, glibc has been known to do this.
1504
1505d_msg_oob (d_socket.U):
1506 This variable conditionally defines the HAS_MSG_OOB symbol,
1507 which indicates that the MSG_OOB is available. #ifdef is
1508 not enough because it may be an enum, glibc has been known to do this.
1509
1510d_msg_peek (d_socket.U):
1511 This variable conditionally defines the HAS_MSG_PEEK symbol,
1512 which indicates that the MSG_PEEK is available. #ifdef is
1513 not enough because it may be an enum, glibc has been known to do this.
1514
1515d_msg_proxy (d_socket.U):
1516 This variable conditionally defines the HAS_MSG_PROXY symbol,
1517 which indicates that the MSG_PROXY is available. #ifdef is
1518 not enough because it may be an enum, glibc has been known to do this.
1519
1520d_msgctl (d_msgctl.U):
1521 This variable conditionally defines the HAS_MSGCTL symbol, which
1522 indicates to the C program that the msgctl() routine is available.
1523
1524d_msgget (d_msgget.U):
1525 This variable conditionally defines the HAS_MSGGET symbol, which
1526 indicates to the C program that the msgget() routine is available.
1527
4e0554ec
JH
1528d_msghdr_s (d_msghdr_s.U):
1529 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1530 which indicates that the struct msghdr is supported.
1531
781b178c
JH
1532d_msgrcv (d_msgrcv.U):
1533 This variable conditionally defines the HAS_MSGRCV symbol, which
1534 indicates to the C program that the msgrcv() routine is available.
1535
1536d_msgsnd (d_msgsnd.U):
1537 This variable conditionally defines the HAS_MSGSND symbol, which
1538 indicates to the C program that the msgsnd() routine is available.
1539
fe749a9f
JH
1540d_msync (d_msync.U):
1541 This variable conditionally defines HAS_MSYNC if msync() is
1542 available to synchronize a mapped file.
1543
1544d_munmap (d_munmap.U):
1545 This variable conditionally defines HAS_MUNMAP if munmap() is
1546 available to unmap a region mapped by mmap().
1547
781b178c
JH
1548d_mymalloc (mallocsrc.U):
1549 This variable conditionally defines MYMALLOC in case other parts
1550 of the source want to take special action if MYMALLOC is used.
1551 This may include different sorts of profiling or error detection.
1552
a33f2d9f
AD
1553d_ndbm (i_ndbm.U):
1554 This variable conditionally defines the HAS_NDBM symbol, which
1555 indicates that both the ndbm.h include file and an appropriate ndbm
1556 library exist. Consult the different i_*ndbm variables
1557 to find out the actual include location. Sometimes, a system has the
1558 header file but not the library. This variable will only be set if
1559 the system has both.
1560
e74475c7
MHM
1561d_ndbm_h_uses_prototypes (i_ndbm.U):
1562 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1563 which indicates that the ndbm.h include file uses real ANSI C
1564 prototypes instead of K&R style function declarations. K&R style
1565 declarations are unsupported in C++, so the include file requires
1566 special handling when using a C++ compiler and this variable is
1567 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1568 to get the same information for alternative ndbm.h include files.
1569
781b178c
JH
1570d_nice (d_nice.U):
1571 This variable conditionally defines the HAS_NICE symbol, which
1572 indicates to the C program that the nice() routine is available.
1573
2765b840
JH
1574d_nl_langinfo (d_nl_langinfo.U):
1575 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1576 indicates to the C program that the nl_langinfo() routine is available.
1577
78691af5 1578d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1579 This variable indicates whether a variable of type nvtype
1580 can preserve all the bits a variable of type uvtype.
1581
f607920a
CB
1582d_nv_zero_is_allbits_zero (perlxv.U):
1583 This variable indicates whether a variable of type nvtype
1584 stores 0.0 in memory as all bits zero.
1585
c890dc6c 1586d_off64_t (d_off64_t.U):
781b178c
JH
1587 This symbol will be defined if the C compiler supports off64_t.
1588
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JH
1589d_old_pthread_create_joinable (d_pthrattrj.U):
1590 This variable conditionally defines pthread_create_joinable.
1591 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1592
1593d_oldpthreads (usethreads.U):
1594 This variable conditionally defines the OLD_PTHREADS_API symbol,
1595 and indicates that Perl should be built to use the old
8c09e4ca 1596 draft POSIX threads API. This is only potentially meaningful if
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JH
1597 usethreads is set.
1598
1599d_oldsock (d_socket.U):
1600 This variable conditionally defines the OLDSOCKET symbol, which
1601 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1602
1603d_open3 (d_open3.U):
1604 This variable conditionally defines the HAS_OPEN3 manifest constant,
1605 which indicates to the C program that the 3 argument version of
1606 the open(2) function is available.
1607
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1608d_pathconf (d_pathconf.U):
1609 This variable conditionally defines the HAS_PATHCONF symbol, which
1610 indicates to the C program that the pathconf() routine is available
1611 to determine file-system related limits and options associated
1612 with a given filename.
1613
1614d_pause (d_pause.U):
1615 This variable conditionally defines the HAS_PAUSE symbol, which
1616 indicates to the C program that the pause() routine is available
1617 to suspend a process until a signal is received.
1618
3b777bb4
GS
1619d_perl_otherlibdirs (otherlibdirs.U):
1620 This variable conditionally defines PERL_OTHERLIBDIRS, which
1621 contains a colon-separated set of paths for the perl binary to
1622 include in @INC. See also otherlibdirs.
1623
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1624d_phostname (d_gethname.U):
1625 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1626 contains the shell command which, when fed to popen(), may be
1627 used to derive the host name.
1628
1629d_pipe (d_pipe.U):
1630 This variable conditionally defines the HAS_PIPE symbol, which
1631 indicates to the C program that the pipe() routine is available
1632 to create an inter-process channel.
1633
1634d_poll (d_poll.U):
1635 This variable conditionally defines the HAS_POLL symbol, which
1636 indicates to the C program that the poll() routine is available
1637 to poll active file descriptors.
1638
1639d_portable (d_portable.U):
1640 This variable conditionally defines the PORTABLE symbol, which
1641 indicates to the C program that it should not assume that it is
1642 running on the machine it was compiled on.
1643
c796e3db
MB
1644d_prctl (d_prctl.U):
1645 This variable conditionally defines the HAS_PRCTL symbol, which
1646 indicates to the C program that the prctl() routine is available.
1647
f918391d
MB
1648d_prctl_set_name (d_prctl.U):
1649 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
2245bcb6
CB
1650 which indicates to the C program that the prctl() routine supports
1651 the PR_SET_NAME option.
c796e3db 1652
4d54317a
JH
1653d_PRId64 (quadfio.U):
1654 This variable conditionally defines the PERL_PRId64 symbol, which
47e01c32 1655 indicates that stdio has a symbol to print 64-bit decimal numbers.
4d54317a
JH
1656
1657d_PRIeldbl (longdblfio.U):
1658 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1659 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1660
1661d_PRIEUldbl (longdblfio.U):
1662 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1663 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1664 The 'U' in the name is to separate this from d_PRIeldbl so that even
1665 case-blind systems can see the difference.
1666
1667d_PRIfldbl (longdblfio.U):
1668 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1669 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1670
1671d_PRIFUldbl (longdblfio.U):
1672 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1673 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1674 The 'U' in the name is to separate this from d_PRIfldbl so that even
1675 case-blind systems can see the difference.
1676
1677d_PRIgldbl (longdblfio.U):
1678 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1679 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1680
1681d_PRIGUldbl (longdblfio.U):
1682 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1683 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1684 The 'U' in the name is to separate this from d_PRIgldbl so that even
1685 case-blind systems can see the difference.
1686
1687d_PRIi64 (quadfio.U):
1688 This variable conditionally defines the PERL_PRIi64 symbol, which
47e01c32 1689 indicates that stdio has a symbol to print 64-bit decimal numbers.
4d54317a 1690
066e7355 1691d_printf_format_null (d_attribut.U):
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MB
1692 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1693 indicates the C compiler allows printf-like formats to be null.
1694
4d54317a
JH
1695d_PRIo64 (quadfio.U):
1696 This variable conditionally defines the PERL_PRIo64 symbol, which
47e01c32 1697 indicates that stdio has a symbol to print 64-bit octal numbers.
4d54317a
JH
1698
1699d_PRIu64 (quadfio.U):
1700 This variable conditionally defines the PERL_PRIu64 symbol, which
47e01c32 1701 indicates that stdio has a symbol to print 64-bit unsigned decimal
4d54317a
JH
1702 numbers.
1703
1704d_PRIx64 (quadfio.U):
1705 This variable conditionally defines the PERL_PRIx64 symbol, which
47e01c32 1706 indicates that stdio has a symbol to print 64-bit hexadecimal numbers.
4d54317a
JH
1707
1708d_PRIXU64 (quadfio.U):
1709 This variable conditionally defines the PERL_PRIXU64 symbol, which
47e01c32 1710 indicates that stdio has a symbol to print 64-bit hExADECimAl numbers.
4d54317a
JH
1711 The 'U' in the name is to separate this from d_PRIx64 so that even
1712 case-blind systems can see the difference.
1713
428dc699
JH
1714d_procselfexe (d_procselfexe.U):
1715 Defined if $procselfexe is symlink to the absolute
1716 pathname of the executing program.
1717
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MB
1718d_pseudofork (d_vfork.U):
1719 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1720 which indicates that an emulation of the fork routine is available.
1721
d6483fcc
JH
1722d_pthread_atfork (d_pthread_atfork.U):
1723 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1724 which indicates to the C program that the pthread_atfork()
1725 routine is available.
1726
505656d3
JH
1727d_pthread_attr_setscope (d_pthread_attr_ss.U):
1728 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1729 pthread_attr_setscope() is available to set the contention scope
1730 attribute of a thread attribute object.
1731
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JH
1732d_pthread_yield (d_pthread_y.U):
1733 This variable conditionally defines the HAS_PTHREAD_YIELD
1734 symbol if the pthread_yield routine is available to yield
1735 the execution of the current thread.
1736
1737d_pwage (i_pwd.U):
1738 This variable conditionally defines PWAGE, which indicates
1739 that struct passwd contains pw_age.
1740
1741d_pwchange (i_pwd.U):
1742 This variable conditionally defines PWCHANGE, which indicates
1743 that struct passwd contains pw_change.
1744
1745d_pwclass (i_pwd.U):
1746 This variable conditionally defines PWCLASS, which indicates
1747 that struct passwd contains pw_class.
1748
1749d_pwcomment (i_pwd.U):
1750 This variable conditionally defines PWCOMMENT, which indicates
1751 that struct passwd contains pw_comment.
1752
1753d_pwexpire (i_pwd.U):
1754 This variable conditionally defines PWEXPIRE, which indicates
1755 that struct passwd contains pw_expire.
1756
1757d_pwgecos (i_pwd.U):
1758 This variable conditionally defines PWGECOS, which indicates
1759 that struct passwd contains pw_gecos.
1760
1761d_pwpasswd (i_pwd.U):
1762 This variable conditionally defines PWPASSWD, which indicates
1763 that struct passwd contains pw_passwd.
1764
1765d_pwquota (i_pwd.U):
1766 This variable conditionally defines PWQUOTA, which indicates
1767 that struct passwd contains pw_quota.
1768
792d8dab
JH
1769d_qgcvt (d_qgcvt.U):
1770 This variable conditionally defines the HAS_QGCVT symbol, which
1771 indicates to the C program that the qgcvt() routine is available.
1772
de1c2614
JH
1773d_quad (quadtype.U):
1774 This variable, if defined, tells that there's a 64-bit integer type,
1775 quadtype.
1776
10bc17b6
JH
1777d_random_r (d_random_r.U):
1778 This variable conditionally defines the HAS_RANDOM_R symbol,
1779 which indicates to the C program that the random_r()
1780 routine is available.
1781
df4c34dc
MB
1782d_readdir (d_readdir.U):
1783 This variable conditionally defines HAS_READDIR if readdir() is
1784 available to read directory entries.
1785
10bc17b6
JH
1786d_readdir64_r (d_readdir64_r.U):
1787 This variable conditionally defines the HAS_READDIR64_R symbol,
1788 which indicates to the C program that the readdir64_r()
1789 routine is available.
1790
10bc17b6
JH
1791d_readdir_r (d_readdir_r.U):
1792 This variable conditionally defines the HAS_READDIR_R symbol,
1793 which indicates to the C program that the readdir_r()
1794 routine is available.
1795
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JH
1796d_readlink (d_readlink.U):
1797 This variable conditionally defines the HAS_READLINK symbol, which
1798 indicates to the C program that the readlink() routine is available
1799 to read the value of a symbolic link.
1800
4e0554ec
JH
1801d_readv (d_readv.U):
1802 This variable conditionally defines the HAS_READV symbol, which
1803 indicates to the C program that the readv() routine is available.
1804
1805d_recvmsg (d_recvmsg.U):
1806 This variable conditionally defines the HAS_RECVMSG symbol, which
1807 indicates to the C program that the recvmsg() routine is available.
1808
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1809d_rename (d_rename.U):
1810 This variable conditionally defines the HAS_RENAME symbol, which
1811 indicates to the C program that the rename() routine is available
1812 to rename files.
1813
1814d_rewinddir (d_readdir.U):
1815 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1816 available.
1817
1818d_rmdir (d_rmdir.U):
1819 This variable conditionally defines HAS_RMDIR if rmdir() is
1820 available to remove directories.
1821
1822d_safebcpy (d_safebcpy.U):
1823 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1824 the bcopy() routine can do overlapping copies. Normally, you
1825 should probably use memmove().
781b178c
JH
1826
1827d_safemcpy (d_safemcpy.U):
1828 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1829 the memcpy() routine can do overlapping copies.
b6cc3bc4 1830 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1831
1832d_sanemcmp (d_sanemcmp.U):
1833 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1834 the memcpy() routine is available and can be used to compare relative
1835 magnitudes of chars with their high bits set.
1836
ef9f17be
JH
1837d_sbrkproto (d_sbrkproto.U):
1838 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1839 which indicates to the C program that the system provides
1840 a prototype for the sbrk() function. Otherwise, it is
1841 up to the program to supply one.
1842
5c567d7d
JH
1843d_scalbnl (d_scalbnl.U):
1844 This variable conditionally defines the HAS_SCALBNL symbol, which
1845 indicates to the C program that the scalbnl() routine is available.
1846 If ilogbl is also present we can emulate frexpl.
1847
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JH
1848d_sched_yield (d_pthread_y.U):
1849 This variable conditionally defines the HAS_SCHED_YIELD
1850 symbol if the sched_yield routine is available to yield
1851 the execution of the current thread.
1852
1853d_scm_rights (d_socket.U):
1854 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1855 which indicates that the SCM_RIGHTS is available. #ifdef is
1856 not enough because it may be an enum, glibc has been known to do this.
1857
4d54317a
JH
1858d_SCNfldbl (longdblfio.U):
1859 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1860 indicates that stdio has a symbol to scan long doubles.
4d54317a 1861
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JH
1862d_seekdir (d_readdir.U):
1863 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1864 available.
1865
1866d_select (d_select.U):
1867 This variable conditionally defines HAS_SELECT if select() is
1868 available to select active file descriptors. A <sys/time.h>
1869 inclusion may be necessary for the timeout field.
1870
1871d_sem (d_sem.U):
1872 This variable conditionally defines the HAS_SEM symbol, which
1873 indicates that the entire sem*(2) library is present.
1874
1875d_semctl (d_semctl.U):
1876 This variable conditionally defines the HAS_SEMCTL symbol, which
1877 indicates to the C program that the semctl() routine is available.
1878
1879d_semctl_semid_ds (d_union_semun.U):
1880 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1881 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1882
1883d_semctl_semun (d_union_semun.U):
1884 This variable conditionally defines USE_SEMCTL_SEMUN, which
1885 indicates that union semun is to be used for semctl IPC_STAT.
1886
1887d_semget (d_semget.U):
1888 This variable conditionally defines the HAS_SEMGET symbol, which
1889 indicates to the C program that the semget() routine is available.
1890
1891d_semop (d_semop.U):
1892 This variable conditionally defines the HAS_SEMOP symbol, which
1893 indicates to the C program that the semop() routine is available.
1894
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JH
1895d_sendmsg (d_sendmsg.U):
1896 This variable conditionally defines the HAS_SENDMSG symbol, which
1897 indicates to the C program that the sendmsg() routine is available.
1898
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1899d_setegid (d_setegid.U):
1900 This variable conditionally defines the HAS_SETEGID symbol, which
1901 indicates to the C program that the setegid() routine is available
1902 to change the effective gid of the current program.
1903
1904d_seteuid (d_seteuid.U):
1905 This variable conditionally defines the HAS_SETEUID symbol, which
1906 indicates to the C program that the seteuid() routine is available
1907 to change the effective uid of the current program.
1908
1909d_setgrent (d_setgrent.U):
1910 This variable conditionally defines the HAS_SETGRENT symbol, which
1911 indicates to the C program that the setgrent() routine is available
1912 for initializing sequential access to the group database.
1913
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JH
1914d_setgrent_r (d_setgrent_r.U):
1915 This variable conditionally defines the HAS_SETGRENT_R symbol,
1916 which indicates to the C program that the setgrent_r()
1917 routine is available.
1918
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JH
1919d_setgrps (d_setgrps.U):
1920 This variable conditionally defines the HAS_SETGROUPS symbol, which
1921 indicates to the C program that the setgroups() routine is available
1922 to set the list of process groups.
1923
1924d_sethent (d_sethent.U):
1925 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1926 available.
1927
10bc17b6
JH
1928d_sethostent_r (d_sethostent_r.U):
1929 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1930 which indicates to the C program that the sethostent_r()
1931 routine is available.
1932
4e0554ec
JH
1933d_setitimer (d_setitimer.U):
1934 This variable conditionally defines the HAS_SETITIMER symbol, which
1935 indicates to the C program that the setitimer() routine is available.
1936
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1937d_setlinebuf (d_setlnbuf.U):
1938 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1939 indicates to the C program that the setlinebuf() routine is available
1940 to change stderr or stdout from block-buffered or unbuffered to a
1941 line-buffered mode.
1942
1943d_setlocale (d_setlocale.U):
1944 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1945 available to handle locale-specific ctype implementations.
1946
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JH
1947d_setlocale_r (d_setlocale_r.U):
1948 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1949 which indicates to the C program that the setlocale_r()
1950 routine is available.
1951
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JH
1952d_setnent (d_setnent.U):
1953 This variable conditionally defines HAS_SETNETENT if setnetent() is
1954 available.
1955
10bc17b6
JH
1956d_setnetent_r (d_setnetent_r.U):
1957 This variable conditionally defines the HAS_SETNETENT_R symbol,
1958 which indicates to the C program that the setnetent_r()
1959 routine is available.
1960
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JH
1961d_setpent (d_setpent.U):
1962 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1963 available.
1964
1965d_setpgid (d_setpgid.U):
1966 This variable conditionally defines the HAS_SETPGID symbol if the
1967 setpgid(pid, gpid) function is available to set process group ID.
1968
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1969d_setpgrp (d_setpgrp.U):
1970 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1971 available to set the current process group.
1972
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JH
1973d_setpgrp2 (d_setpgrp2.U):
1974 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1975 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1976 is available to set the current process group.
1977
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1978d_setprior (d_setprior.U):
1979 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1980 is available to set a process's priority.
1981
af960fef
JH
1982d_setproctitle (d_setproctitle.U):
1983 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1984 which indicates to the C program that the setproctitle() routine
1985 is available.
1986
10bc17b6
JH
1987d_setprotoent_r (d_setprotoent_r.U):
1988 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1989 which indicates to the C program that the setprotoent_r()
1990 routine is available.
1991
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1992d_setpwent (d_setpwent.U):
1993 This variable conditionally defines the HAS_SETPWENT symbol, which
1994 indicates to the C program that the setpwent() routine is available
1995 for initializing sequential access to the passwd database.
1996
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JH
1997d_setpwent_r (d_setpwent_r.U):
1998 This variable conditionally defines the HAS_SETPWENT_R symbol,
1999 which indicates to the C program that the setpwent_r()
2000 routine is available.
2001
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2002d_setregid (d_setregid.U):
2003 This variable conditionally defines HAS_SETREGID if setregid() is
2004 available to change the real and effective gid of the current
2005 process.
2006
2007d_setresgid (d_setregid.U):
2008 This variable conditionally defines HAS_SETRESGID if setresgid() is
2009 available to change the real, effective and saved gid of the current
2010 process.
2011
2012d_setresuid (d_setreuid.U):
2013 This variable conditionally defines HAS_SETREUID if setresuid() is
2014 available to change the real, effective and saved uid of the current
2015 process.
2016
2017d_setreuid (d_setreuid.U):
2018 This variable conditionally defines HAS_SETREUID if setreuid() is
2019 available to change the real and effective uid of the current
2020 process.
2021
2022d_setrgid (d_setrgid.U):
2023 This variable conditionally defines the HAS_SETRGID symbol, which
2024 indicates to the C program that the setrgid() routine is available
2025 to change the real gid of the current program.
2026
2027d_setruid (d_setruid.U):
2028 This variable conditionally defines the HAS_SETRUID symbol, which
2029 indicates to the C program that the setruid() routine is available
2030 to change the real uid of the current program.
2031
2032d_setsent (d_setsent.U):
2033 This variable conditionally defines HAS_SETSERVENT if setservent() is
2034 available.
2035
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JH
2036d_setservent_r (d_setservent_r.U):
2037 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2038 which indicates to the C program that the setservent_r()
2039 routine is available.
2040
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JH
2041d_setsid (d_setsid.U):
2042 This variable conditionally defines HAS_SETSID if setsid() is
2043 available to set the process group ID.
2044
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JH
2045d_setvbuf (d_setvbuf.U):
2046 This variable conditionally defines the HAS_SETVBUF symbol, which
2047 indicates to the C program that the setvbuf() routine is available
2048 to change buffering on an open stdio stream.
2049
2050d_sfio (d_sfio.U):
2051 This variable conditionally defines the USE_SFIO symbol,
2052 and indicates whether sfio is available (and should be used).
2053
2054d_shm (d_shm.U):
2055 This variable conditionally defines the HAS_SHM symbol, which
2056 indicates that the entire shm*(2) library is present.
2057
2058d_shmat (d_shmat.U):
2059 This variable conditionally defines the HAS_SHMAT symbol, which
2060 indicates to the C program that the shmat() routine is available.
2061
2062d_shmatprototype (d_shmat.U):
635aebb7 2063 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
781b178c
JH
2064 symbol, which indicates that sys/shm.h has a prototype for
2065 shmat.
2066
2067d_shmctl (d_shmctl.U):
2068 This variable conditionally defines the HAS_SHMCTL symbol, which
2069 indicates to the C program that the shmctl() routine is available.
2070
2071d_shmdt (d_shmdt.U):
2072 This variable conditionally defines the HAS_SHMDT symbol, which
2073 indicates to the C program that the shmdt() routine is available.
2074
2075d_shmget (d_shmget.U):
2076 This variable conditionally defines the HAS_SHMGET symbol, which
2077 indicates to the C program that the shmget() routine is available.
2078
2079d_sigaction (d_sigaction.U):
2080 This variable conditionally defines the HAS_SIGACTION symbol, which
2081 indicates that the Vr4 sigaction() routine is available.
2082
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AD
2083d_signbit (d_signbit.U):
2084 This variable conditionally defines the HAS_SIGNBIT symbol, which
2085 indicates to the C program that the signbit() routine is available
2086 and safe to use with perl's intern NV type.
2087
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JH
2088d_sigprocmask (d_sigprocmask.U):
2089 This variable conditionally defines HAS_SIGPROCMASK
2090 if sigprocmask() is available to examine or change the signal mask
2091 of the calling process.
2092
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2093d_sigsetjmp (d_sigsetjmp.U):
2094 This variable conditionally defines the HAS_SIGSETJMP symbol,
2095 which indicates that the sigsetjmp() routine is available to
2096 call setjmp() and optionally save the process's signal mask.
2097
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2098d_sin6_scope_id (d_socket.U):
2099 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2100 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2101 member.
2102
c95d0e17
GA
2103d_sitearch (sitearch.U):
2104 This variable conditionally defines SITEARCH to hold the pathname
2105 of architecture-dependent library files for $package. If
2106 $sitearch is the same as $archlib, then this is set to undef.
2107
df4c34dc
MB
2108d_snprintf (d_snprintf.U):
2109 This variable conditionally defines the HAS_SNPRINTF symbol, which
2110 indicates to the C program that the snprintf () library function
2111 is available.
2112
18126d98
MB
2113d_sockaddr_in6 (d_socket.U):
2114 This variable conditionally defines the HAS_SOCKADDR_IN6 symbol, which
2115 indicates the availability of a struct sockaddr_in6.
2116
b8677e3b
MB
2117d_sockaddr_sa_len (d_socket.U):
2118 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2119 which indicates that a struct sockaddr structure has the sa_len
2120 member.
2121
49a78c82
JH
2122d_sockatmark (d_sockatmark.U):
2123 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2124 indicates to the C program that the sockatmark() routine is available.
2125
5af95cda
JH
2126d_sockatmarkproto (d_sockatmarkproto.U):
2127 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2128 which indicates to the C program that the system provides
2129 a prototype for the sockatmark() function. Otherwise, it is
2130 up to the program to supply one.
2131
781b178c
JH
2132d_socket (d_socket.U):
2133 This variable conditionally defines HAS_SOCKET, which indicates
2134 that the BSD socket interface is supported.
2135
13b3f787
JH
2136d_socklen_t (d_socklen_t.U):
2137 This symbol will be defined if the C compiler supports socklen_t.
2138
781b178c
JH
2139d_sockpair (d_socket.U):
2140 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2141 indicates that the BSD socketpair() is supported.
2142
6b356c8e
JH
2143d_socks5_init (d_socks5_init.U):
2144 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2145 indicates to the C program that the socks5_init() routine is available.
2146
df4c34dc 2147d_sprintf_returns_strlen (d_sprintf_len.U):
78821a22
NC
2148 This variable defines whether sprintf returns the length of the string
2149 (as per the ANSI spec). Some C libraries retain compatibility with
2150 pre-ANSI C and return a pointer to the passed in buffer; for these
2151 this variable will be undef.
2152
68d4903c
JH
2153d_sqrtl (d_sqrtl.U):
2154 This variable conditionally defines the HAS_SQRTL symbol, which
2155 indicates to the C program that the sqrtl() routine is available.
2156
10bc17b6
JH
2157d_srand48_r (d_srand48_r.U):
2158 This variable conditionally defines the HAS_SRAND48_R symbol,
2159 which indicates to the C program that the srand48_r()
2160 routine is available.
2161
2162d_srandom_r (d_srandom_r.U):
2163 This variable conditionally defines the HAS_SRANDOM_R symbol,
2164 which indicates to the C program that the srandom_r()
2165 routine is available.
2166
eef837ea
JH
2167d_sresgproto (d_sresgproto.U):
2168 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2169 which indicates to the C program that the system provides
2170 a prototype for the setresgid() function. Otherwise, it is
2171 up to the program to supply one.
2172
640374d0
JH
2173d_sresuproto (d_sresuproto.U):
2174 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2175 which indicates to the C program that the system provides
2176 a prototype for the setresuid() function. Otherwise, it is
2177 up to the program to supply one.
2178
781b178c
JH
2179d_statblks (d_statblks.U):
2180 This variable conditionally defines USE_STAT_BLOCKS
2181 if this system has a stat structure declaring
2182 st_blksize and st_blocks.
2183
ad27e871 2184d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 2185 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
2186 symbol, which indicates to struct statfs from has f_flags member.
2187 This kind of struct statfs is coming from sys/mount.h (BSD),
2188 not from sys/statfs.h (SYSV).
2189
ad27e871 2190d_statfs_s (d_statfs_s.U):
0545a864
JH
2191 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2192 which indicates that the struct statfs is supported.
2193
9e08e8f0
MB
2194d_static_inline (d_static_inline.U):
2195 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2196 which indicates that the C compiler supports C99-style static
2197 inline. That is, the function can't be called from another
2198 translation unit.
2199
781b178c
JH
2200d_statvfs (d_statvfs.U):
2201 This variable conditionally defines the HAS_STATVFS symbol, which
2202 indicates to the C program that the statvfs() routine is available.
2203
2204d_stdio_cnt_lval (d_stdstdio.U):
2205 This variable conditionally defines STDIO_CNT_LVALUE if the
2206 FILE_cnt macro can be used as an lvalue.
2207
2208d_stdio_ptr_lval (d_stdstdio.U):
2209 This variable conditionally defines STDIO_PTR_LVALUE if the
2210 FILE_ptr macro can be used as an lvalue.
2211
a7ffa9b9
NC
2212d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2213 This symbol is defined if using the FILE_ptr macro as an lvalue
2214 to increase the pointer by n leaves File_cnt(fp) unchanged.
2215
2216d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2217 This symbol is defined if using the FILE_ptr macro as an lvalue
2218 to increase the pointer by n has the side effect of decreasing the
2219 value of File_cnt(fp) by n.
2220
781b178c
JH
2221d_stdio_stream_array (stdio_streams.U):
2222 This variable tells whether there is an array holding
2223 the stdio streams.
2224
2225d_stdiobase (d_stdstdio.U):
2226 This variable conditionally defines USE_STDIO_BASE if this system
2227 has a FILE structure declaring a usable _base field (or equivalent)
2228 in stdio.h.
2229
2230d_stdstdio (d_stdstdio.U):
2231 This variable conditionally defines USE_STDIO_PTR if this system
2232 has a FILE structure declaring usable _ptr and _cnt fields (or
2233 equivalent) in stdio.h.
2234
781b178c
JH
2235d_strchr (d_strchr.U):
2236 This variable conditionally defines HAS_STRCHR if strchr() and
2237 strrchr() are available for string searching.
2238
2239d_strcoll (d_strcoll.U):
2240 This variable conditionally defines HAS_STRCOLL if strcoll() is
2241 available to compare strings using collating information.
2242
2243d_strctcpy (d_strctcpy.U):
2244 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2245 indicates to the C program that this C compiler knows how to copy
2246 structures.
2247
2248d_strerrm (d_strerror.U):
1332606d 2249 This variable holds what Strerror is defined as to translate an error
781b178c 2250 code condition into an error message string. It could be 'strerror'
1332606d 2251 or a more complex macro emulating strerror with sys_errlist[], or the
781b178c
JH
2252 "unknown" string when both strerror and sys_errlist are missing.
2253
2254d_strerror (d_strerror.U):
2255 This variable conditionally defines HAS_STRERROR if strerror() is
2256 available to translate error numbers to strings.
2257
10bc17b6
JH
2258d_strerror_r (d_strerror_r.U):
2259 This variable conditionally defines the HAS_STRERROR_R symbol,
2260 which indicates to the C program that the strerror_r()
2261 routine is available.
2262
b3c85772
JH
2263d_strftime (d_strftime.U):
2264 This variable conditionally defines the HAS_STRFTIME symbol, which
2265 indicates to the C program that the strftime() routine is available.
2266
fd550ca5
MB
2267d_strlcat (d_strlcat.U):
2268 This variable conditionally defines the HAS_STRLCAT symbol, which
2269 indicates to the C program that the strlcat () routine is available.
2270
2271d_strlcpy (d_strlcpy.U):
2272 This variable conditionally defines the HAS_STRLCPY symbol, which
2273 indicates to the C program that the strlcpy () routine is available.
2274
781b178c
JH
2275d_strtod (d_strtod.U):
2276 This variable conditionally defines the HAS_STRTOD symbol, which
2277 indicates to the C program that the strtod() routine is available
2278 to provide better numeric string conversion than atof().
2279
2280d_strtol (d_strtol.U):
2281 This variable conditionally defines the HAS_STRTOL symbol, which
2282 indicates to the C program that the strtol() routine is available
2283 to provide better numeric string conversion than atoi() and friends.
2284
ff935051
JH
2285d_strtold (d_strtold.U):
2286 This variable conditionally defines the HAS_STRTOLD symbol, which
2287 indicates to the C program that the strtold() routine is available.
2288
76d49b1c
JH
2289d_strtoll (d_strtoll.U):
2290 This variable conditionally defines the HAS_STRTOLL symbol, which
2291 indicates to the C program that the strtoll() routine is available.
2292
d0e6d399
NC
2293d_strtoq (d_strtoq.U):
2294 This variable conditionally defines the HAS_STRTOQ symbol, which
2295 indicates to the C program that the strtoq() routine is available.
2296
781b178c
JH
2297d_strtoul (d_strtoul.U):
2298 This variable conditionally defines the HAS_STRTOUL symbol, which
2299 indicates to the C program that the strtoul() routine is available
2300 to provide conversion of strings to unsigned long.
2301
ff935051 2302d_strtoull (d_strtoull.U):
11dc3f68
JH
2303 This variable conditionally defines the HAS_STRTOULL symbol, which
2304 indicates to the C program that the strtoull() routine is available.
2305
ff935051
JH
2306d_strtouq (d_strtouq.U):
2307 This variable conditionally defines the HAS_STRTOUQ symbol, which
2308 indicates to the C program that the strtouq() routine is available.
2309
781b178c
JH
2310d_strxfrm (d_strxfrm.U):
2311 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2312 available to transform strings.
2313
2314d_suidsafe (d_dosuid.U):
2315 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2316 if setuid scripts can be secure. This test looks in /dev/fd/.
2317
2318d_symlink (d_symlink.U):
2319 This variable conditionally defines the HAS_SYMLINK symbol, which
2320 indicates to the C program that the symlink() routine is available
2321 to create symbolic links.
2322
2323d_syscall (d_syscall.U):
2324 This variable conditionally defines HAS_SYSCALL if syscall() is
2325 available call arbitrary system calls.
2326
5af95cda
JH
2327d_syscallproto (d_syscallproto.U):
2328 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2329 which indicates to the C program that the system provides
2330 a prototype for the syscall() function. Otherwise, it is
2331 up to the program to supply one.
2332
781b178c
JH
2333d_sysconf (d_sysconf.U):
2334 This variable conditionally defines the HAS_SYSCONF symbol, which
2335 indicates to the C program that the sysconf() routine is available
2336 to determine system related limits and options.
2337
2338d_sysernlst (d_strerror.U):
2339 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2340 is available to translate error numbers to the symbolic name.
2341
2342d_syserrlst (d_strerror.U):
2343 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2344 available to translate error numbers to strings.
2345
2346d_system (d_system.U):
2347 This variable conditionally defines HAS_SYSTEM if system() is
2348 available to issue a shell command.
2349
2350d_tcgetpgrp (d_tcgtpgrp.U):
2351 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2352 indicates to the C program that the tcgetpgrp() routine is available.
2353 to get foreground process group ID.
2354
2355d_tcsetpgrp (d_tcstpgrp.U):
2356 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2357 indicates to the C program that the tcsetpgrp() routine is available
2358 to set foreground process group ID.
2359
781b178c
JH
2360d_telldir (d_readdir.U):
2361 This variable conditionally defines HAS_TELLDIR if telldir() is
2362 available.
2363
2364d_telldirproto (d_telldirproto.U):
2365 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2366 which indicates to the C program that the system provides
2367 a prototype for the telldir() function. Otherwise, it is
2368 up to the program to supply one.
2369
2370d_time (d_time.U):
2371 This variable conditionally defines the HAS_TIME symbol, which indicates
47e01c32 2372 that the time() routine exists. The time() routine is normally
781b178c
JH
2373 provided on UNIX systems.
2374
cbb9e8a7
MB
2375d_timegm (d_timegm.U):
2376 This variable conditionally defines the HAS_TIMEGM symbol, which
2377 indicates to the C program that the timegm () routine is available.
2378
781b178c
JH
2379d_times (d_times.U):
2380 This variable conditionally defines the HAS_TIMES symbol, which indicates
47e01c32 2381 that the times() routine exists. The times() routine is normally
781b178c
JH
2382 provided on UNIX systems. You may have to include <sys/times.h>.
2383
511116db
JH
2384d_tm_tm_gmtoff (i_time.U):
2385 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2386 indicates to the C program that the struct tm has the tm_gmtoff field.
2387
2388d_tm_tm_zone (i_time.U):
2389 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2390 indicates to the C program that the struct tm has the tm_zone field.
2391
10bc17b6
JH
2392d_tmpnam_r (d_tmpnam_r.U):
2393 This variable conditionally defines the HAS_TMPNAM_R symbol,
2394 which indicates to the C program that the tmpnam_r()
2395 routine is available.
2396
781b178c
JH
2397d_truncate (d_truncate.U):
2398 This variable conditionally defines HAS_TRUNCATE if truncate() is
2399 available to truncate files.
2400
10bc17b6
JH
2401d_ttyname_r (d_ttyname_r.U):
2402 This variable conditionally defines the HAS_TTYNAME_R symbol,
2403 which indicates to the C program that the ttyname_r()
2404 routine is available.
2405
781b178c
JH
2406d_tzname (d_tzname.U):
2407 This variable conditionally defines HAS_TZNAME if tzname[] is
2408 available to access timezone names.
2409
4e0554ec
JH
2410d_u32align (d_u32align.U):
2411 This variable tells whether you must access character data
2412 through U32-aligned pointers.
2413
2414d_ualarm (d_ualarm.U):
2415 This variable conditionally defines the HAS_UALARM symbol, which
2416 indicates to the C program that the ualarm() routine is available.
2417
781b178c
JH
2418d_umask (d_umask.U):
2419 This variable conditionally defines the HAS_UMASK symbol, which
2420 indicates to the C program that the umask() routine is available.
2421 to set and get the value of the file creation mask.
2422
2423d_uname (d_gethname.U):
2424 This variable conditionally defines the HAS_UNAME symbol, which
2425 indicates to the C program that the uname() routine may be
2426 used to derive the host name.
2427
2428d_union_semun (d_union_semun.U):
2429 This variable conditionally defines HAS_UNION_SEMUN if the
2430 union semun is defined by including <sys/sem.h>.
2431
758a5d79
JH
2432d_unordered (d_unordered.U):
2433 This variable conditionally defines the HAS_UNORDERED symbol, which
2434 indicates to the C program that the unordered() routine is available.
2435
bdf33aa7
SP
2436d_unsetenv (d_unsetenv.U):
2437 This variable conditionally defines the HAS_UNSETENV symbol, which
2438 indicates to the C program that the unsetenv () routine is available.
2439
4e0554ec
JH
2440d_usleep (d_usleep.U):
2441 This variable conditionally defines HAS_USLEEP if usleep() is
2442 available to do high granularity sleeps.
2443
5af95cda
JH
2444d_usleepproto (d_usleepproto.U):
2445 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2446 which indicates to the C program that the system provides
2447 a prototype for the usleep() function. Otherwise, it is
2448 up to the program to supply one.
2449
0545a864
JH
2450d_ustat (d_ustat.U):
2451 This variable conditionally defines HAS_USTAT if ustat() is
2452 available to query file system statistics by dev_t.
2453
526fdc24
MS
2454d_vendorarch (vendorarch.U):
2455 This variable conditionally defined PERL_VENDORARCH.
2456
0617aed7
JH
2457d_vendorbin (vendorbin.U):
2458 This variable conditionally defines PERL_VENDORBIN.
2459
a3635516
JH
2460d_vendorlib (vendorlib.U):
2461 This variable conditionally defines PERL_VENDORLIB.
2462
10305dfa
JH
2463d_vendorscript (vendorscript.U):
2464 This variable conditionally defines PERL_VENDORSCRIPT.
2465
781b178c
JH
2466d_vfork (d_vfork.U):
2467 This variable conditionally defines the HAS_VFORK symbol, which
2468 indicates the vfork() routine is available.
2469
2470d_void_closedir (d_closedir.U):
2471 This variable conditionally defines VOID_CLOSEDIR if closedir()
2472 does not return a value.
2473
2474d_voidsig (d_voidsig.U):
2475 This variable conditionally defines VOIDSIG if this system
2476 declares "void (*signal(...))()" in signal.h. The old way was to
2477 declare it as "int (*signal(...))()".
2478
2479d_voidtty (i_sysioctl.U):
2480 This variable conditionally defines USE_IOCNOTTY to indicate that the
2481 ioctl() call with TIOCNOTTY should be used to void tty association.
2482 Otherwise (on USG probably), it is enough to close the standard file
47e01c32 2483 descriptors and do a setpgrp().
781b178c
JH
2484
2485d_volatile (d_volatile.U):
2486 This variable conditionally defines the HASVOLATILE symbol, which
2487 indicates to the C program that this C compiler knows about the
2488 volatile declaration.
2489
2490d_vprintf (d_vprintf.U):
2491 This variable conditionally defines the HAS_VPRINTF symbol, which
2492 indicates to the C program that the vprintf() routine is available
2493 to printf with a pointer to an argument list.
2494
df4c34dc
MB
2495d_vsnprintf (d_snprintf.U):
2496 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2497 indicates to the C program that the vsnprintf () library function
2498 is available.
2499
781b178c
JH
2500d_wait4 (d_wait4.U):
2501 This variable conditionally defines the HAS_WAIT4 symbol, which
2502 indicates the wait4() routine is available.
2503
2504d_waitpid (d_waitpid.U):
2505 This variable conditionally defines HAS_WAITPID if waitpid() is
2506 available to wait for child process.
2507
2508d_wcstombs (d_wcstombs.U):
2509 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2510 indicates to the C program that the wcstombs() routine is available
2511 to convert wide character strings to multibyte strings.
2512
2513d_wctomb (d_wctomb.U):
2514 This variable conditionally defines the HAS_WCTOMB symbol, which
2515 indicates to the C program that the wctomb() routine is available
2516 to convert a wide character to a multibyte.
2517
4e0554ec
JH
2518d_writev (d_writev.U):
2519 This variable conditionally defines the HAS_WRITEV symbol, which
2520 indicates to the C program that the writev() routine is available.
2521
781b178c
JH
2522d_xenix (Guess.U):
2523 This variable conditionally defines the symbol XENIX, which alerts
2524 the C program that it runs under Xenix.
2525
2526date (Loc.U):
5bf26616 2527 This variable is used internally by Configure to determine the
781b178c
JH
2528 full pathname (if any) of the date program. After Configure runs,
2529 the value is reset to a plain "date" and is not useful.
2530
2531db_hashtype (i_db.U):
2532 This variable contains the type of the hash structure element
2533 in the <db.h> header file. In older versions of DB, it was
2534 int, while in newer ones it is u_int32_t.
2535
2536db_prefixtype (i_db.U):
2537 This variable contains the type of the prefix structure element
2538 in the <db.h> header file. In older versions of DB, it was
2539 int, while in newer ones it is size_t.
2540
640374d0
JH
2541db_version_major (i_db.U):
2542 This variable contains the major version number of
2543 Berkeley DB found in the <db.h> header file.
2544
2545db_version_minor (i_db.U):
2546 This variable contains the minor version number of
2547 Berkeley DB found in the <db.h> header file.
2548 For DB version 1 this is always 0.
2549
2550db_version_patch (i_db.U):
2551 This variable contains the patch version number of
2552 Berkeley DB found in the <db.h> header file.
2553 For DB version 1 this is always 0.
2554
781b178c
JH
2555defvoidused (voidflags.U):
2556 This variable contains the default value of the VOIDUSED symbol (15).
2557
2558direntrytype (i_dirent.U):
2559 This symbol is set to 'struct direct' or 'struct dirent' depending on
2560 whether dirent is available or not. You should use this pseudo type to
2561 portably declare your directory entries.
2562
2563dlext (dlext.U):
2564 This variable contains the extension that is to be used for the
1332606d 2565 dynamically loaded modules that perl generates.
781b178c
JH
2566
2567dlsrc (dlsrc.U):
2568 This variable contains the name of the dynamic loading file that
2569 will be used with the package.
2570
2571doublesize (doublesize.U):
2572 This variable contains the value of the DOUBLESIZE symbol, which
2573 indicates to the C program how many bytes there are in a double.
2574
2575drand01 (randfunc.U):
2576 Indicates the macro to be used to generate normalized
2577 random numbers. Uses randfunc, often divided by
2578 (double) (((unsigned long) 1 << randbits)) in order to
2579 normalize the result.
2580 In C programs, the macro 'Drand01' is mapped to drand01.
2581
10bc17b6
JH
2582drand48_r_proto (d_drand48_r.U):
2583 This variable encodes the prototype of drand48_r.
39183afa
JH
2584 It is zero if d_drand48_r is undef, and one of the
2585 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2586 is defined.
10bc17b6 2587
34f1896b
MB
2588dtrace (usedtrace.U):
2589 This variable holds the location of the dtrace executable.
2590
781b178c
JH
2591dynamic_ext (Extensions.U):
2592 This variable holds a list of XS extension files we want to
2593 link dynamically into the package. It is used by Makefile.
2594
2595eagain (nblock_io.U):
2596 This variable bears the symbolic errno code set by read() when no
2597 data is present on the file and non-blocking I/O was enabled (otherwise,
2598 read() blocks naturally).
2599
2600ebcdic (ebcdic.U):
2601 This variable conditionally defines EBCDIC if this
1332606d 2602 system uses EBCDIC encoding.
781b178c
JH
2603
2604echo (Loc.U):
5bf26616 2605 This variable is used internally by Configure to determine the
781b178c
JH
2606 full pathname (if any) of the echo program. After Configure runs,
2607 the value is reset to a plain "echo" and is not useful.
2608
2609egrep (Loc.U):
5bf26616 2610 This variable is used internally by Configure to determine the
781b178c
JH
2611 full pathname (if any) of the egrep program. After Configure runs,
2612 the value is reset to a plain "egrep" and is not useful.
2613
2614emacs (Loc.U):
2615 This variable is defined but not used by Configure.
fcdf39cf 2616 The value is the empty string and is not useful.
781b178c 2617
10bc17b6
JH
2618endgrent_r_proto (d_endgrent_r.U):
2619 This variable encodes the prototype of endgrent_r.
39183afa
JH
2620 It is zero if d_endgrent_r is undef, and one of the
2621 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2622 is defined.
10bc17b6
JH
2623
2624endhostent_r_proto (d_endhostent_r.U):
2625 This variable encodes the prototype of endhostent_r.
39183afa
JH
2626 It is zero if d_endhostent_r is undef, and one of the
2627 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2628 is defined.
10bc17b6
JH
2629
2630endnetent_r_proto (d_endnetent_r.U):
2631 This variable encodes the prototype of endnetent_r.
39183afa
JH
2632 It is zero if d_endnetent_r is undef, and one of the
2633 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2634 is defined.
10bc17b6
JH
2635
2636endprotoent_r_proto (d_endprotoent_r.U):
2637 This variable encodes the prototype of endprotoent_r.
39183afa
JH
2638 It is zero if d_endprotoent_r is undef, and one of the
2639 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2640 is defined.
10bc17b6
JH
2641
2642endpwent_r_proto (d_endpwent_r.U):
2643 This variable encodes the prototype of endpwent_r.
39183afa
JH
2644 It is zero if d_endpwent_r is undef, and one of the
2645 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2646 is defined.
10bc17b6
JH
2647
2648endservent_r_proto (d_endservent_r.U):
2649 This variable encodes the prototype of endservent_r.
39183afa
JH
2650 It is zero if d_endservent_r is undef, and one of the
2651 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2652 is defined.
10bc17b6 2653
781b178c
JH
2654eunicefix (Init.U):
2655 When running under Eunice this variable contains a command which will
2656 convert a shell script to the proper form of text file for it to be
2657 executable by the shell. On other systems it is a no-op.
2658
2659exe_ext (Unix.U):
2660 This is an old synonym for _exe.
2661
2662expr (Loc.U):
5bf26616 2663 This variable is used internally by Configure to determine the
781b178c
JH
2664 full pathname (if any) of the expr program. After Configure runs,
2665 the value is reset to a plain "expr" and is not useful.
2666
2667extensions (Extensions.U):
2668 This variable holds a list of all extension files (both XS and
f7b3892b 2669 non-xs) installed with the package. It is propagated to Config.pm
47e01c32 2670 and is typically used to test whether a particular extension
781b178c
JH
2671 is available.
2672
61c26d18
MHM
2673extern_C (Csym.U):
2674 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
2675 variable can be used in Configure to do the right thing.
2676
cb7ddd31
JH
2677extras (Extras.U):
2678 This variable holds a list of extra modules to install.
2679
781b178c
JH
2680fflushall (fflushall.U):
2681 This symbol, if defined, tells that to flush
2682 all pending stdio output one must loop through all
2683 the stdio file handles stored in an array and fflush them.
2684 Note that if fflushNULL is defined, fflushall will not
2685 even be probed for and will be left undefined.
2686
4d54317a
JH
2687fflushNULL (fflushall.U):
2688 This symbol, if defined, tells that fflush(NULL) does flush
2689 all pending stdio output.
2690
781b178c 2691find (Loc.U):
ff935051 2692 This variable is defined but not used by Configure.
fcdf39cf 2693 The value is the empty string and is not useful.
781b178c
JH
2694
2695firstmakefile (Unix.U):
2696 This variable defines the first file searched by make. On unix,
2697 it is makefile (then Makefile). On case-insensitive systems,
2698 it might be something else. This is only used to deal with
2699 convoluted make depend tricks.
2700
2701flex (Loc.U):
2702 This variable is defined but not used by Configure.
fcdf39cf 2703 The value is the empty string and is not useful.
781b178c 2704
a22e52b9
JH
2705fpossize (fpossize.U):
2706 This variable contains the size of a fpostype in bytes.
2707
781b178c 2708fpostype (fpostype.U):
635aebb7 2709 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2710 uint, or whatever type is used to declare file positions in libc.
2711
2712freetype (mallocsrc.U):
2713 This variable contains the return type of free(). It is usually
2714 void, but occasionally int.
2715
5440bc8e
JH
2716from (Cross.U):
2717 This variable contains the command used by Configure
2718 to copy files from the target host. Useful and available
2719 only during Perl build.
2720 The string ':' if not cross-compiling.
2721
781b178c
JH
2722full_ar (Loc_ar.U):
2723 This variable contains the full pathname to 'ar', whether or
2724 not the user has specified 'portability'. This is only used
2725 in the Makefile.SH.
2726
2727full_csh (d_csh.U):
2728 This variable contains the full pathname to 'csh', whether or
2729 not the user has specified 'portability'. This is only used
2730 in the compiled C program, and we assume that all systems which
2731 can share this executable will have the same full pathname to
2732 'csh.'
2733
2734full_sed (Loc_sed.U):
2735 This variable contains the full pathname to 'sed', whether or
2736 not the user has specified 'portability'. This is only used
2737 in the compiled C program, and we assume that all systems which
2738 can share this executable will have the same full pathname to
2739 'sed.'
2740
123f32c0
MB
2741gccansipedantic (gccvers.U):
2742 If GNU cc (gcc) is used, this variable will enable (if set) the
2743 -ansi and -pedantic ccflags for building core files (through
2744 cflags script). (See Porting/pumpkin.pod for full description).
2745
af960fef 2746gccosandvers (gccvers.U):
123f32c0
MB
2747 If GNU cc (gcc) is used, this variable holds the operating system
2748 and version used to compile gcc. It is set to '' if not gcc,
af960fef
JH
2749 or if nothing useful can be parsed as the os version.
2750
2751gccversion (gccvers.U):
123f32c0 2752 If GNU cc (gcc) is used, this variable holds '1' or '2' to
781b178c
JH
2753 indicate whether the compiler is version 1 or 2. This is used in
2754 setting some of the default cflags. It is set to '' if not gcc.
2755
10bc17b6
JH
2756getgrent_r_proto (d_getgrent_r.U):
2757 This variable encodes the prototype of getgrent_r.
39183afa
JH
2758 It is zero if d_getgrent_r is undef, and one of the
2759 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2760 is defined.
10bc17b6
JH
2761
2762getgrgid_r_proto (d_getgrgid_r.U):
2763 This variable encodes the prototype of getgrgid_r.
39183afa
JH
2764 It is zero if d_getgrgid_r is undef, and one of the
2765 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2766 is defined.
10bc17b6
JH
2767
2768getgrnam_r_proto (d_getgrnam_r.U):
2769 This variable encodes the prototype of getgrnam_r.
39183afa
JH
2770 It is zero if d_getgrnam_r is undef, and one of the
2771 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2772 is defined.
10bc17b6
JH
2773
2774gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2775 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
2776 It is zero if d_gethostbyaddr_r is undef, and one of the
2777 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2778 is defined.
10bc17b6
JH
2779
2780gethostbyname_r_proto (d_gethostbyname_r.U):
2781 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
2782 It is zero if d_gethostbyname_r is undef, and one of the
2783 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2784 is defined.
10bc17b6
JH
2785
2786gethostent_r_proto (d_gethostent_r.U):
2787 This variable encodes the prototype of gethostent_r.
39183afa
JH
2788 It is zero if d_gethostent_r is undef, and one of the
2789 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2790 is defined.
10bc17b6
JH
2791
2792getlogin_r_proto (d_getlogin_r.U):
2793 This variable encodes the prototype of getlogin_r.
39183afa
JH
2794 It is zero if d_getlogin_r is undef, and one of the
2795 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2796 is defined.
10bc17b6
JH
2797
2798getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2799 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
2800 It is zero if d_getnetbyaddr_r is undef, and one of the
2801 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2802 is defined.
10bc17b6
JH
2803
2804getnetbyname_r_proto (d_getnetbyname_r.U):
2805 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
2806 It is zero if d_getnetbyname_r is undef, and one of the
2807 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2808 is defined.
10bc17b6
JH
2809
2810getnetent_r_proto (d_getnetent_r.U):
2811 This variable encodes the prototype of getnetent_r.
39183afa
JH
2812 It is zero if d_getnetent_r is undef, and one of the
2813 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2814 is defined.
10bc17b6
JH
2815
2816getprotobyname_r_proto (d_getprotobyname_r.U):
2817 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
2818 It is zero if d_getprotobyname_r is undef, and one of the
2819 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2820 is defined.
10bc17b6
JH
2821
2822getprotobynumber_r_proto (d_getprotobynumber_r.U):
2823 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
2824 It is zero if d_getprotobynumber_r is undef, and one of the
2825 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2826 is defined.
10bc17b6
JH
2827
2828getprotoent_r_proto (d_getprotoent_r.U):
2829 This variable encodes the prototype of getprotoent_r.
39183afa
JH
2830 It is zero if d_getprotoent_r is undef, and one of the
2831 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2832 is defined.
10bc17b6
JH
2833
2834getpwent_r_proto (d_getpwent_r.U):
2835 This variable encodes the prototype of getpwent_r.
39183afa
JH
2836 It is zero if d_getpwent_r is undef, and one of the
2837 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2838 is defined.
10bc17b6
JH
2839
2840getpwnam_r_proto (d_getpwnam_r.U):
2841 This variable encodes the prototype of getpwnam_r.
39183afa
JH
2842 It is zero if d_getpwnam_r is undef, and one of the
2843 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2844 is defined.
10bc17b6
JH
2845
2846getpwuid_r_proto (d_getpwuid_r.U):
2847 This variable encodes the prototype of getpwuid_r.
39183afa
JH
2848 It is zero if d_getpwuid_r is undef, and one of the
2849 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2850 is defined.
10bc17b6
JH
2851
2852getservbyname_r_proto (d_getservbyname_r.U):
2853 This variable encodes the prototype of getservbyname_r.
39183afa
JH
2854 It is zero if d_getservbyname_r is undef, and one of the
2855 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2856 is defined.
10bc17b6
JH
2857
2858getservbyport_r_proto (d_getservbyport_r.U):
2859 This variable encodes the prototype of getservbyport_r.
39183afa
JH
2860 It is zero if d_getservbyport_r is undef, and one of the
2861 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2862 is defined.
10bc17b6
JH
2863
2864getservent_r_proto (d_getservent_r.U):
2865 This variable encodes the prototype of getservent_r.
39183afa
JH
2866 It is zero if d_getservent_r is undef, and one of the
2867 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2868 is defined.
10bc17b6
JH
2869
2870getspnam_r_proto (d_getspnam_r.U):
2871 This variable encodes the prototype of getspnam_r.
39183afa
JH
2872 It is zero if d_getspnam_r is undef, and one of the
2873 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2874 is defined.
10bc17b6 2875
a22e52b9
JH
2876gidformat (gidf.U):
2877 This variable contains the format string used for printing a Gid_t.
2878
785fb66b
JH
2879gidsign (gidsign.U):
2880 This variable contains the signedness of a gidtype.
2881 1 for unsigned, -1 for signed.
2882
2883gidsize (gidsize.U):
2884 This variable contains the size of a gidtype in bytes.
2885
781b178c
JH
2886gidtype (gidtype.U):
2887 This variable defines Gid_t to be something like gid_t, int,
2888 ushort, or whatever type is used to declare the return type
2889 of getgid(). Typically, it is the type of group ids in the kernel.
2890
2891glibpth (libpth.U):
2892 This variable holds the general path (space-separated) used to
2893 find libraries. It may contain directories that do not exist on
2894 this platform, libpth is the cleaned-up version.
2895
c68a00c0
JH
2896gmake (Loc.U):
2897 This variable is used internally by Configure to determine the
2898 full pathname (if any) of the gmake program. After Configure runs,
2899 the value is reset to a plain "gmake" and is not useful.
2900
10bc17b6
JH
2901gmtime_r_proto (d_gmtime_r.U):
2902 This variable encodes the prototype of gmtime_r.
39183afa
JH
2903 It is zero if d_gmtime_r is undef, and one of the
2904 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2905 is defined.
10bc17b6 2906
00fac743
JH
2907gnulibc_version (d_gnulibc.U):
2908 This variable contains the version number of the GNU C library.
2909 It is usually something like '2.2.5'. It is a plain '' if this
2910 is not the GNU C library, or if the version is unknown.
2911
781b178c 2912grep (Loc.U):
5bf26616 2913 This variable is used internally by Configure to determine the
781b178c
JH
2914 full pathname (if any) of the grep program. After Configure runs,
2915 the value is reset to a plain "grep" and is not useful.
2916
2917groupcat (nis.U):
2918 This variable contains a command that produces the text of the
2919 /etc/group file. This is normally "cat /etc/group", but can be
2920 "ypcat group" when NIS is used.
aaacdc8b
GS
2921 On some systems, such as os390, there may be no equivalent
2922 command, in which case this variable is unset.
781b178c
JH
2923
2924groupstype (groupstype.U):
635aebb7 2925 This variable defines Groups_t to be something like gid_t, int,
781b178c
JH
2926 ushort, or whatever type is used for the second argument to
2927 getgroups() and setgroups(). Usually, this is the same as
2928 gidtype (gid_t), but sometimes it isn't.
2929
2930gzip (Loc.U):
5bf26616 2931 This variable is used internally by Configure to determine the
781b178c
JH
2932 full pathname (if any) of the gzip program. After Configure runs,
2933 the value is reset to a plain "gzip" and is not useful.
2934
2935h_fcntl (h_fcntl.U):
2936 This is variable gets set in various places to tell i_fcntl that
2937 <fcntl.h> should be included.
2938
2939h_sysfile (h_sysfile.U):
2940 This is variable gets set in various places to tell i_sys_file that
2941 <sys/file.h> should be included.
2942
2943hint (Oldconfig.U):
2944 Gives the type of hints used for previous answers. May be one of
2945 "default", "recommended" or "previous".
2946
2947hostcat (nis.U):
2948 This variable contains a command that produces the text of the
2949 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2950 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2951 On some systems, such as os390, there may be no equivalent
2952 command, in which case this variable is unset.
781b178c 2953
10305dfa
JH
2954html1dir (html1dir.U):
2955 This variable contains the name of the directory in which html
2956 source pages are to be put. This directory is for pages
2957 that describe whole programs, not libraries or modules. It
2958 is intended to correspond roughly to section 1 of the Unix
2959 manuals.
2960
2961html1direxp (html1dir.U):
2962 This variable is the same as the html1dir variable, but is filename
2963 expanded at configuration time, for convenient use in makefiles.
2964
2965html3dir (html3dir.U):
2966 This variable contains the name of the directory in which html
2967 source pages are to be put. This directory is for pages
2968 that describe libraries or modules. It is intended to
2969 correspond roughly to section 3 of the Unix manuals.
2970
2971html3direxp (html3dir.U):
2972 This variable is the same as the html3dir variable, but is filename
2973 expanded at configuration time, for convenient use in makefiles.
2974
a22e52b9
JH
2975i16size (perlxv.U):
2976 This variable is the size of an I16 in bytes.
2977
2978i16type (perlxv.U):
2979 This variable contains the C type used for Perl's I16.
2980
2981i32size (perlxv.U):
2982 This variable is the size of an I32 in bytes.
2983
2984i32type (perlxv.U):
2985 This variable contains the C type used for Perl's I32.
2986
2987i64size (perlxv.U):
2988 This variable is the size of an I64 in bytes.
2989
2990i64type (perlxv.U):
2991 This variable contains the C type used for Perl's I64.
2992
2993i8size (perlxv.U):
2994 This variable is the size of an I8 in bytes.
2995
2996i8type (perlxv.U):
2997 This variable contains the C type used for Perl's I8.
2998
781b178c
JH
2999i_arpainet (i_arpainet.U):
3000 This variable conditionally defines the I_ARPA_INET symbol,
3001 and indicates whether a C program should include <arpa/inet.h>.
3002
2a0de2c5
NC
3003i_assert (i_assert.U):
3004 This variable conditionally defines the I_ASSERT symbol, which
c0bacbef
MB
3005 indicates to the C program that <assert.h> exists and could be
3006 included.
2a0de2c5 3007
781b178c
JH
3008i_bsdioctl (i_sysioctl.U):
3009 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
3010 indicates to the C program that <sys/bsdioctl.h> exists and should
3011 be included.
3012
10bc17b6
JH
3013i_crypt (i_crypt.U):
3014 This variable conditionally defines the I_CRYPT symbol, and indicates
3015 whether a C program should include <crypt.h>.
3016
781b178c
JH
3017i_db (i_db.U):
3018 This variable conditionally defines the I_DB symbol, and indicates
3019 whether a C program may include Berkeley's DB include file <db.h>.
3020
3021i_dbm (i_dbm.U):
3022 This variable conditionally defines the I_DBM symbol, which
3023 indicates to the C program that <dbm.h> exists and should
3024 be included.
3025
3026i_dirent (i_dirent.U):
3027 This variable conditionally defines I_DIRENT, which indicates
3028 to the C program that it should include <dirent.h>.
3029
3030i_dld (i_dld.U):
3031 This variable conditionally defines the I_DLD symbol, which
3032 indicates to the C program that <dld.h> (GNU dynamic loading)
3033 exists and should be included.
3034
3035i_dlfcn (i_dlfcn.U):
3036 This variable conditionally defines the I_DLFCN symbol, which
3037 indicates to the C program that <dlfcn.h> exists and should
3038 be included.
3039
3040i_fcntl (i_fcntl.U):
3041 This variable controls the value of I_FCNTL (which tells
3042 the C program to include <fcntl.h>).
3043
3044i_float (i_float.U):
3045 This variable conditionally defines the I_FLOAT symbol, and indicates
3046 whether a C program may include <float.h> to get symbols like DBL_MAX
3047 or DBL_MIN, i.e. machine dependent floating point values.
3048
758a5d79
JH
3049i_fp (i_fp.U):
3050 This variable conditionally defines the I_FP symbol, and indicates
3051 whether a C program should include <fp.h>.
3052
3053i_fp_class (i_fp_class.U):
3054 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3055 whether a C program should include <fp_class.h>.
3056
781b178c
JH
3057i_gdbm (i_gdbm.U):
3058 This variable conditionally defines the I_GDBM symbol, which
3059 indicates to the C program that <gdbm.h> exists and should
3060 be included.
3061
a33f2d9f
AD
3062i_gdbm_ndbm (i_ndbm.U):
3063 This variable conditionally defines the I_GDBM_NDBM symbol, which
3064 indicates to the C program that <gdbm-ndbm.h> exists and should
3065 be included. This is the location of the ndbm.h compatibility file
3066 in Debian 4.0.
3067
3068i_gdbmndbm (i_ndbm.U):
3069 This variable conditionally defines the I_GDBMNDBM symbol, which
3070 indicates to the C program that <gdbm/ndbm.h> exists and should
3071 be included. This was the location of the ndbm.h compatibility file
3072 in RedHat 7.1.
3073
781b178c
JH
3074i_grp (i_grp.U):
3075 This variable conditionally defines the I_GRP symbol, and indicates
3076 whether a C program should include <grp.h>.
3077
792d8dab
JH
3078i_ieeefp (i_ieeefp.U):
3079 This variable conditionally defines the I_IEEEFP symbol, and indicates
3080 whether a C program should include <ieeefp.h>.
3081
781b178c
JH
3082i_inttypes (i_inttypes.U):
3083 This variable conditionally defines the I_INTTYPES symbol,
3084 and indicates whether a C program should include <inttypes.h>.
3085
2765b840
JH
3086i_langinfo (i_langinfo.U):
3087 This variable conditionally defines the I_LANGINFO symbol,
3088 and indicates whether a C program should include <langinfo.h>.
3089
af960fef
JH
3090i_libutil (i_libutil.U):
3091 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3092 whether a C program should include <libutil.h>.
3093
781b178c
JH
3094i_limits (i_limits.U):
3095 This variable conditionally defines the I_LIMITS symbol, and indicates
3096 whether a C program may include <limits.h> to get symbols like WORD_BIT
3097 and friends.
3098
3099i_locale (i_locale.U):
3100 This variable conditionally defines the I_LOCALE symbol,
3101 and indicates whether a C program should include <locale.h>.
3102
3103i_machcthr (i_machcthr.U):
3104 This variable conditionally defines the I_MACH_CTHREADS symbol,
3105 and indicates whether a C program should include <mach/cthreads.h>.
3106
3107i_malloc (i_malloc.U):
3108 This variable conditionally defines the I_MALLOC symbol, and indicates
3109 whether a C program should include <malloc.h>.
3110
1cd66f7c
DD
3111i_mallocmalloc (i_mallocmalloc.U):
3112 This variable conditionally defines the I_MALLOCMALLOC symbol,
3113 and indicates whether a C program should include <malloc/malloc.h>.
3114
781b178c
JH
3115i_math (i_math.U):
3116 This variable conditionally defines the I_MATH symbol, and indicates
3117 whether a C program may include <math.h>.
3118
3119i_memory (i_memory.U):
3120 This variable conditionally defines the I_MEMORY symbol, and indicates
3121 whether a C program should include <memory.h>.
3122
3123i_mntent (i_mntent.U):
3124 This variable conditionally defines the I_MNTENT symbol, and indicates
3125 whether a C program should include <mntent.h>.
3126
3127i_ndbm (i_ndbm.U):
3128 This variable conditionally defines the I_NDBM symbol, which
3129 indicates to the C program that <ndbm.h> exists and should
3130 be included.
3131
3132i_netdb (i_netdb.U):
3133 This variable conditionally defines the I_NETDB symbol, and indicates
3134 whether a C program should include <netdb.h>.
3135
3136i_neterrno (i_neterrno.U):
3137 This variable conditionally defines the I_NET_ERRNO symbol, which
3138 indicates to the C program that <net/errno.h> exists and should
3139 be included.
3140
3141i_netinettcp (i_netinettcp.U):
3142 This variable conditionally defines the I_NETINET_TCP symbol,
3143 and indicates whether a C program should include <netinet/tcp.h>.
3144
3145i_niin (i_niin.U):
3146 This variable conditionally defines I_NETINET_IN, which indicates
3147 to the C program that it should include <netinet/in.h>. Otherwise,
3148 you may try <sys/in.h>.
3149
3150i_poll (i_poll.U):
3151 This variable conditionally defines the I_POLL symbol, and indicates
3152 whether a C program should include <poll.h>.
3153
3813c136
JH
3154i_prot (i_prot.U):
3155 This variable conditionally defines the I_PROT symbol, and indicates
3156 whether a C program should include <prot.h>.
3157
781b178c 3158i_pthread (i_pthread.U):
190b66db 3159 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
3160 and indicates whether a C program should include <pthread.h>.
3161
3162i_pwd (i_pwd.U):
3163 This variable conditionally defines I_PWD, which indicates
3164 to the C program that it should include <pwd.h>.
3165
3166i_rpcsvcdbm (i_dbm.U):
3167 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3168 indicates to the C program that <rpcsvc/dbm.h> exists and should
3169 be included. Some System V systems might need this instead of <dbm.h>.
3170
3171i_sfio (i_sfio.U):
3172 This variable conditionally defines the I_SFIO symbol,
3173 and indicates whether a C program should include <sfio.h>.
3174
3175i_sgtty (i_termio.U):
3176 This variable conditionally defines the I_SGTTY symbol, which
3177 indicates to the C program that it should include <sgtty.h> rather
3178 than <termio.h>.
3179
3180i_shadow (i_shadow.U):
3181 This variable conditionally defines the I_SHADOW symbol, and indicates
3182 whether a C program should include <shadow.h>.
3183
3184i_socks (i_socks.U):
3185 This variable conditionally defines the I_SOCKS symbol, and indicates
3186 whether a C program should include <socks.h>.
3187
3188i_stdarg (i_varhdr.U):
3189 This variable conditionally defines the I_STDARG symbol, which
3190 indicates to the C program that <stdarg.h> exists and should
3191 be included.
3192
bd31be4b
NC
3193i_stdbool (i_stdbool.U):
3194 This variable conditionally defines the I_STDBOOL symbol, which
3195 indicates to the C program that <stdbool.h> exists and should
3196 be included.
3197
781b178c
JH
3198i_stddef (i_stddef.U):
3199 This variable conditionally defines the I_STDDEF symbol, which
3200 indicates to the C program that <stddef.h> exists and should
3201 be included.
3202
3203i_stdlib (i_stdlib.U):
3204 This variable conditionally defines the I_STDLIB symbol, which
3205 indicates to the C program that <stdlib.h> exists and should
3206 be included.
3207
3208i_string (i_string.U):
3209 This variable conditionally defines the I_STRING symbol, which
3210 indicates that <string.h> should be included rather than <strings.h>.
3211
792d8dab
JH
3212i_sunmath (i_sunmath.U):
3213 This variable conditionally defines the I_SUNMATH symbol, and indicates
3214 whether a C program should include <sunmath.h>.
3215
781b178c
JH
3216i_sysaccess (i_sysaccess.U):
3217 This variable conditionally defines the I_SYS_ACCESS symbol,
3218 and indicates whether a C program should include <sys/access.h>.
3219
3220i_sysdir (i_sysdir.U):
3221 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3222 whether a C program should include <sys/dir.h>.
3223
3224i_sysfile (i_sysfile.U):
3225 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3226 whether a C program should include <sys/file.h> to get R_OK and friends.
3227
3228i_sysfilio (i_sysioctl.U):
3229 This variable conditionally defines the I_SYS_FILIO symbol, which
3230 indicates to the C program that <sys/filio.h> exists and should
3231 be included in preference to <sys/ioctl.h>.
3232
3233i_sysin (i_niin.U):
3234 This variable conditionally defines I_SYS_IN, which indicates
3235 to the C program that it should include <sys/in.h> instead of
3236 <netinet/in.h>.
3237
3238i_sysioctl (i_sysioctl.U):
3239 This variable conditionally defines the I_SYS_IOCTL symbol, which
3240 indicates to the C program that <sys/ioctl.h> exists and should
3241 be included.
3242
ca52efda
JH
3243i_syslog (i_syslog.U):
3244 This variable conditionally defines the I_SYSLOG symbol,
3245 and indicates whether a C program should include <syslog.h>.
3246
fe749a9f
JH
3247i_sysmman (i_sysmman.U):
3248 This variable conditionally defines the I_SYS_MMAN symbol, and
3249 indicates whether a C program should include <sys/mman.h>.
3250
87b71857
JH
3251i_sysmode (i_sysmode.U):
3252 This variable conditionally defines the I_SYSMODE symbol,
3253 and indicates whether a C program should include <sys/mode.h>.
3254
781b178c
JH
3255i_sysmount (i_sysmount.U):
3256 This variable conditionally defines the I_SYSMOUNT symbol,
3257 and indicates whether a C program should include <sys/mount.h>.
3258
3259i_sysndir (i_sysndir.U):
3260 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3261 whether a C program should include <sys/ndir.h>.
3262
3263i_sysparam (i_sysparam.U):
3264 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3265 whether a C program should include <sys/param.h>.
3266
216dac04
MB
3267i_syspoll (i_syspoll.U):
3268 This variable conditionally defines the I_SYS_POLL symbol, which
3269 indicates to the C program that it should include <sys/poll.h>.
3270
781b178c
JH
3271i_sysresrc (i_sysresrc.U):
3272 This variable conditionally defines the I_SYS_RESOURCE symbol,
3273 and indicates whether a C program should include <sys/resource.h>.
3274
3275i_syssecrt (i_syssecrt.U):
3276 This variable conditionally defines the I_SYS_SECURITY symbol,
3277 and indicates whether a C program should include <sys/security.h>.
3278
3279i_sysselct (i_sysselct.U):
3280 This variable conditionally defines I_SYS_SELECT, which indicates
3281 to the C program that it should include <sys/select.h> in order to
3282 get the definition of struct timeval.
3283
3284i_syssockio (i_sysioctl.U):
3285 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3286 C program that socket ioctl codes may be found in <sys/sockio.h>
3287 instead of <sys/ioctl.h>.
3288
3289i_sysstat (i_sysstat.U):
3290 This variable conditionally defines the I_SYS_STAT symbol,
3291 and indicates whether a C program should include <sys/stat.h>.
3292
0545a864
JH
3293i_sysstatfs (i_sysstatfs.U):
3294 This variable conditionally defines the I_SYSSTATFS symbol,
3295 and indicates whether a C program should include <sys/statfs.h>.
3296
781b178c
JH
3297i_sysstatvfs (i_sysstatvfs.U):
3298 This variable conditionally defines the I_SYSSTATVFS symbol,
3299 and indicates whether a C program should include <sys/statvfs.h>.
3300
3301i_systime (i_time.U):
3302 This variable conditionally defines I_SYS_TIME, which indicates
3303 to the C program that it should include <sys/time.h>.
3304
3305i_systimek (i_time.U):
3306 This variable conditionally defines I_SYS_TIME_KERNEL, which
3307 indicates to the C program that it should include <sys/time.h>
3308 with KERNEL defined.
3309
3310i_systimes (i_systimes.U):
3311 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3312 whether a C program should include <sys/times.h>.
3313
3314i_systypes (i_systypes.U):
3315 This variable conditionally defines the I_SYS_TYPES symbol,
3316 and indicates whether a C program should include <sys/types.h>.
3317
3318i_sysuio (i_sysuio.U):
3319 This variable conditionally defines the I_SYSUIO symbol, and indicates
3320 whether a C program should include <sys/uio.h>.
3321
3322i_sysun (i_sysun.U):
3323 This variable conditionally defines I_SYS_UN, which indicates
3324 to the C program that it should include <sys/un.h> to get UNIX
3325 domain socket definitions.
3326
d4935d7f
JH
3327i_sysutsname (i_sysutsname.U):
3328 This variable conditionally defines the I_SYSUTSNAME symbol,
3329 and indicates whether a C program should include <sys/utsname.h>.
3330
0545a864
JH
3331i_sysvfs (i_sysvfs.U):
3332 This variable conditionally defines the I_SYSVFS symbol,
3333 and indicates whether a C program should include <sys/vfs.h>.
3334
781b178c
JH
3335i_syswait (i_syswait.U):
3336 This variable conditionally defines I_SYS_WAIT, which indicates
3337 to the C program that it should include <sys/wait.h>.
3338
3339i_termio (i_termio.U):
3340 This variable conditionally defines the I_TERMIO symbol, which
3341 indicates to the C program that it should include <termio.h> rather
3342 than <sgtty.h>.
3343
3344i_termios (i_termio.U):
3345 This variable conditionally defines the I_TERMIOS symbol, which
3346 indicates to the C program that the POSIX <termios.h> file is
3347 to be included.
3348
3349i_time (i_time.U):
3350 This variable conditionally defines I_TIME, which indicates
3351 to the C program that it should include <time.h>.
3352
3353i_unistd (i_unistd.U):
3354 This variable conditionally defines the I_UNISTD symbol, and indicates
3355 whether a C program should include <unistd.h>.
3356
0545a864
JH
3357i_ustat (i_ustat.U):
3358 This variable conditionally defines the I_USTAT symbol, and indicates
3359 whether a C program should include <ustat.h>.
3360
781b178c
JH
3361i_utime (i_utime.U):
3362 This variable conditionally defines the I_UTIME symbol, and indicates
3363 whether a C program should include <utime.h>.
3364
3365i_values (i_values.U):
3366 This variable conditionally defines the I_VALUES symbol, and indicates
3367 whether a C program may include <values.h> to get symbols like MAXLONG
3368 and friends.
3369
3370i_varargs (i_varhdr.U):
3371 This variable conditionally defines I_VARARGS, which indicates
3372 to the C program that it should include <varargs.h>.
3373
3374i_varhdr (i_varhdr.U):
3375 Contains the name of the header to be included to get va_dcl definition.
3376 Typically one of varargs.h or stdarg.h.
3377
3378i_vfork (i_vfork.U):
3379 This variable conditionally defines the I_VFORK symbol, and indicates
3380 whether a C program should include vfork.h.
3381
3382ignore_versioned_solibs (libs.U):
3383 This variable should be non-empty if non-versioned shared
3384 libraries (libfoo.so.x.y) are to be ignored (because they
3385 cannot be linked against).
3386
ff935051
JH
3387inc_version_list (inc_version_list.U):
3388 This variable specifies the list of subdirectories in over
3389 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
3390 search when adding directories to @INC. The elements in
3391 the list are separated by spaces. This is only useful
ff935051
JH
3392 if you have a perl library directory tree structured like the
3393 default one. See INSTALL for how this works. The versioned
3394 site_perl directory was introduced in 5.005, so that is the
3395 lowest possible value.
3396
df4c34dc
MB
3397 This list includes architecture-dependent directories back to
3398 version $api_versionstring (e.g. 5.5.640) and
3399 architecture-independent directories all the way back to
3400 5.005.
3401
3a096bf3
JH
3402inc_version_list_init (inc_version_list.U):
3403 This variable holds the same list as inc_version_list, but
635aebb7 3404 each item is enclosed in double quotes and separated by commas,
3a096bf3
JH
3405 suitable for use in the PERL_INC_VERSION_LIST initialization.
3406
781b178c 3407incpath (usrinc.U):
bce0fc72 3408 This variable must precede the normal include path to get the
209e5c0a 3409 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
3410 Value can be "" or "/bsd43" on mips.
3411
3412inews (Loc.U):
3413 This variable is defined but not used by Configure.
fcdf39cf 3414 The value is the empty string and is not useful.
781b178c 3415
df4c34dc
MB
3416initialinstalllocation (bin.U):
3417 When userelocatableinc is true, this variable holds the location
3418 that make install should copy the perl binary to, with all the
3419 run-time relocatable paths calculated from this at install time.
1332606d 3420 When used, it is initialized to the original value of binexp, and
df4c34dc
MB
3421 then binexp is set to '.../', as the other binaries are found
3422 relative to the perl binary.
3423
781b178c
JH
3424installarchlib (archlib.U):
3425 This variable is really the same as archlibexp but may differ on
3426 those systems using AFS. For extra portability, only this variable
3427 should be used in makefiles.
3428
3429installbin (bin.U):
3430 This variable is the same as binexp unless AFS is running in which case
47e01c32 3431 the user is explicitly prompted for it. This variable should always
781b178c
JH
3432 be used in your makefiles for maximum portability.
3433
10305dfa 3434installhtml1dir (html1dir.U):
635aebb7
AL
3435 This variable is really the same as html1direxp, unless you are
3436 using a different installprefix. For extra portability, you
10305dfa
JH
3437 should only use this variable within your makefiles.
3438
3439installhtml3dir (html3dir.U):
635aebb7
AL
3440 This variable is really the same as html3direxp, unless you are
3441 using a different installprefix. For extra portability, you
10305dfa
JH
3442 should only use this variable within your makefiles.
3443
781b178c
JH
3444installman1dir (man1dir.U):
3445 This variable is really the same as man1direxp, unless you are using
3446 AFS in which case it points to the read/write location whereas
3447 man1direxp only points to the read-only access location. For extra
3448 portability, you should only use this variable within your makefiles.
3449
3450installman3dir (man3dir.U):
3451 This variable is really the same as man3direxp, unless you are using
3452 AFS in which case it points to the read/write location whereas
3453 man3direxp only points to the read-only access location. For extra
3454 portability, you should only use this variable within your makefiles.
3455
3456installprefix (installprefix.U):
635aebb7 3457 This variable holds the name of the directory below which
781b178c
JH
3458 "make install" will install the package. For most users, this
3459 is the same as prefix. However, it is useful for
3460 installing the software into a different (usually temporary)
3461 location after which it can be bundled up and moved somehow
3462 to the final location specified by prefix.
3463
3464installprefixexp (installprefix.U):
3465 This variable holds the full absolute path of installprefix
3466 with all ~-expansion done.
3467
3468installprivlib (privlib.U):
3469 This variable is really the same as privlibexp but may differ on
3470 those systems using AFS. For extra portability, only this variable
3471 should be used in makefiles.
3472
3473installscript (scriptdir.U):
3474 This variable is usually the same as scriptdirexp, unless you are on
3475 a system running AFS, in which case they may differ slightly. You
3476 should always use this variable within your makefiles for portability.
3477
3478installsitearch (sitearch.U):
3479 This variable is really the same as sitearchexp but may differ on
3480 those systems using AFS. For extra portability, only this variable
3481 should be used in makefiles.
3482
0617aed7
JH
3483installsitebin (sitebin.U):
3484 This variable is usually the same as sitebinexp, unless you are on
3485 a system running AFS, in which case they may differ slightly. You
3486 should always use this variable within your makefiles for portability.
3487
e755722e
JH
3488installsitehtml1dir (sitehtml1dir.U):
3489 This variable is really the same as sitehtml1direxp, unless you are using
10305dfa
JH
3490 AFS in which case it points to the read/write location whereas
3491 html1direxp only points to the read-only access location. For extra
3492 portability, you should only use this variable within your makefiles.
3493
e755722e
JH
3494installsitehtml3dir (sitehtml3dir.U):
3495 This variable is really the same as sitehtml3direxp, unless you are using
10305dfa
JH
3496 AFS in which case it points to the read/write location whereas
3497 html3direxp only points to the read-only access location. For extra
3498 portability, you should only use this variable within your makefiles.
3499
781b178c
JH
3500installsitelib (sitelib.U):
3501 This variable is really the same as sitelibexp but may differ on
3502 those systems using AFS. For extra portability, only this variable
3503 should be used in makefiles.
3504
e755722e
JH
3505installsiteman1dir (siteman1dir.U):
3506 This variable is really the same as siteman1direxp, unless you are using
10305dfa
JH
3507 AFS in which case it points to the read/write location whereas
3508 man1direxp only points to the read-only access location. For extra
3509 portability, you should only use this variable within your makefiles.
3510
e755722e
JH
3511installsiteman3dir (siteman3dir.U):
3512 This variable is really the same as siteman3direxp, unless you are using
10305dfa
JH
3513 AFS in which case it points to the read/write location whereas
3514 man3direxp only points to the read-only access location. For extra
3515 portability, you should only use this variable within your makefiles.
3516
3517installsitescript (sitescript.U):
3518 This variable is usually the same as sitescriptexp, unless you are on
3519 a system running AFS, in which case they may differ slightly. You
3520 should always use this variable within your makefiles for portability.
3521
781b178c
JH
3522installstyle (installstyle.U):
3523 This variable describes the "style" of the perl installation.
3524 This is intended to be useful for tools that need to
3525 manipulate entire perl distributions. Perl itself doesn't use
3526 this to find its libraries -- the library directories are
3527 stored directly in Config.pm. Currently, there are only two
3528 styles: "lib" and "lib/perl5". The default library locations
3529 (e.g. privlib, sitelib) are either $prefix/lib or
3530 $prefix/lib/perl5. The former is useful if $prefix is a
3531 directory dedicated to perl (e.g. /opt/perl), while the latter
3532 is useful if $prefix is shared by many packages, e.g. if
3533 $prefix=/usr/local.
9c20e9bc 3534
123f32c0
MB
3535 Unfortunately, while this "style" variable is used to set
3536 defaults for all three directory hierarchies (core, vendor, and
3537 site), there is no guarantee that the same style is actually
3538 appropriate for all those directories. For example, $prefix
3539 might be /opt/perl, but $siteprefix might be /usr/local.
3540 (Perhaps, in retrospect, the "lib" style should never have been
3541 supported, but it did seem like a nice idea at the time.)
3542
3543 The situation is even less clear for tools such as MakeMaker
3544 that can be used to install additional modules into
3545 non-standard places. For example, if a user intends to install
3546 a module into a private directory (perhaps by setting PREFIX on
3547 the Makefile.PL command line), then there is no reason to
3548 assume that the Configure-time $installstyle setting will be
3549 relevant for that PREFIX.
3550
9c20e9bc 3551 This may later be extended to include other information, so
781b178c 3552 be careful with pattern-matching on the results.
9c20e9bc
JH
3553
3554 For compatibility with perl5.005 and earlier, the default
781b178c
JH
3555 setting is based on whether or not $prefix contains the string
3556 "perl".
3557
3558installusrbinperl (instubperl.U):
3559 This variable tells whether Perl should be installed also as
3560 /usr/bin/perl in addition to
3561 $installbin/perl
3562
526fdc24
MS
3563installvendorarch (vendorarch.U):
3564 This variable is really the same as vendorarchexp but may differ on
3565 those systems using AFS. For extra portability, only this variable
3566 should be used in makefiles.
3567
0617aed7
JH
3568installvendorbin (vendorbin.U):
3569 This variable is really the same as vendorbinexp but may differ on
3570 those systems using AFS. For extra portability, only this variable
3571 should be used in makefiles.
3572
e755722e
JH
3573installvendorhtml1dir (vendorhtml1dir.U):
3574 This variable is really the same as vendorhtml1direxp but may differ on
10305dfa
JH
3575 those systems using AFS. For extra portability, only this variable
3576 should be used in makefiles.
3577
e755722e
JH
3578installvendorhtml3dir (vendorhtml3dir.U):
3579 This variable is really the same as vendorhtml3direxp but may differ on
10305dfa
JH
3580 those systems using AFS. For extra portability, only this variable
3581 should be used in makefiles.
3582
a3635516
JH
3583installvendorlib (vendorlib.U):
3584 This variable is really the same as vendorlibexp but may differ on
3585 those systems using AFS. For extra portability, only this variable
3586 should be used in makefiles.
3587
e755722e
JH
3588installvendorman1dir (vendorman1dir.U):
3589 This variable is really the same as vendorman1direxp but may differ on
10305dfa
JH
3590 those systems using AFS. For extra portability, only this variable
3591 should be used in makefiles.
3592
e755722e
JH
3593installvendorman3dir (vendorman3dir.U):
3594 This variable is really the same as vendorman3direxp but may differ on
10305dfa
JH
3595 those systems using AFS. For extra portability, only this variable
3596 should be used in makefiles.
3597
3598installvendorscript (vendorscript.U):
3599 This variable is really the same as vendorscriptexp but may differ on
3600 those systems using AFS. For extra portability, only this variable
3601 should be used in makefiles.
3602
781b178c
JH
3603intsize (intsize.U):
3604 This variable contains the value of the INTSIZE symbol, which
3605 indicates to the C program how many bytes there are in an int.
3606
4b661809 3607issymlink (issymlink.U):
983dbef6
JH
3608 This variable holds the test command to test for a symbolic link
3609 (if they are supported). Typical values include 'test -h' and
3610 'test -L'.
4b661809 3611
a22e52b9
JH
3612ivdformat (perlxvf.U):
3613 This variable contains the format string used for printing
635aebb7 3614 a Perl IV as a signed decimal integer.
a22e52b9
JH
3615
3616ivsize (perlxv.U):
3617 This variable is the size of an IV in bytes.
3618
3619ivtype (perlxv.U):
3620 This variable contains the C type used for Perl's IV.
3621
781b178c 3622known_extensions (Extensions.U):
f7b3892b
NC
3623 This variable holds a list of all extensions (both XS and non-xs)
3624 included in the package source distribution. This information is
3625 only really of use during the Perl build, as the list makes no
3626 distinction between extensions which were build and installed, and
3627 those which where not. See "extensions" for the list of extensions
3628 actually built and available.
781b178c
JH
3629
3630ksh (Loc.U):
3631 This variable is defined but not used by Configure.
fcdf39cf 3632 The value is the empty string and is not useful.
781b178c 3633
781b178c
JH
3634ld (dlsrc.U):
3635 This variable indicates the program to be used to link
3636 libraries for dynamic loading. On some systems, it is 'ld'.
3637 On ELF systems, it should be $cc. Mostly, we'll try to respect
3638 the hint file setting.
3639
9ec4dadf
MB
3640ld_can_script (dlsrc.U):
3641 This variable shows if the loader accepts scripts in the form of
3642 -Wl,--version-script=ld.script. This is currently only supported
3643 for GNU ld on ELF in dynamic loading builds.
3644
781b178c
JH
3645lddlflags (dlsrc.U):
3646 This variable contains any special flags that might need to be
3647 passed to $ld to create a shared library suitable for dynamic
3648 loading. It is up to the makefile to use it. For hpux, it
3649 should be '-b'. For sunos 4.1, it is empty.
3650
3651ldflags (ccflags.U):
3652 This variable contains any additional C loader flags desired by
3653 the user. It is up to the Makefile to use this.
3654
af960fef
JH
3655ldflags_uselargefiles (uselfs.U):
3656 This variable contains the loader flags needed by large file builds
3657 and added to ldflags by hints files.
3658
781b178c
JH
3659ldlibpthname (libperl.U):
3660 This variable holds the name of the shared library
3661 search path, often LD_LIBRARY_PATH. To get an empty
3662 string, the hints file must set this to 'none'.
3663
3664less (Loc.U):
5bf26616 3665 This variable is used internally by Configure to determine the
781b178c
JH
3666 full pathname (if any) of the less program. After Configure runs,
3667 the value is reset to a plain "less" and is not useful.
3668
3669lib_ext (Unix.U):
3670 This is an old synonym for _a.
3671
3672libc (libc.U):
3673 This variable contains the location of the C library.
3674
3675libperl (libperl.U):
3676 The perl executable is obtained by linking perlmain.c with
3677 libperl, any static extensions (usually just DynaLoader),
3678 and any other libraries needed on this system. libperl
3679 is usually libperl.a, but can also be libperl.so.xxx if
3680 the user wishes to build a perl executable with a shared
3681 library.
3682
3683libpth (libpth.U):
3684 This variable holds the general path (space-separated) used to find
3685 libraries. It is intended to be used by other units.
3686
3687libs (libs.U):
3688 This variable holds the additional libraries we want to use.
9285ede2 3689 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3690
fe749a9f
JH
3691libsdirs (libs.U):
3692 This variable holds the directory names aka dirnames of the libraries
3693 we found and accepted, duplicates are removed.
3694
3695libsfiles (libs.U):
3696 This variable holds the filenames aka basenames of the libraries
3697 we found and accepted.
3698
3699libsfound (libs.U):
3700 This variable holds the full pathnames of the libraries
3701 we found and accepted.
3702
13b3f787
JH
3703libspath (libs.U):
3704 This variable holds the directory names probed for libraries.
3705
781b178c
JH
3706libswanted (Myinit.U):
3707 This variable holds a list of all the libraries we want to
3708 search. The order is chosen to pick up the c library
3709 ahead of ucb or bsd libraries for SVR4.
3710
af960fef
JH
3711libswanted_uselargefiles (uselfs.U):
3712 This variable contains the libraries needed by large file builds
3713 and added to ldflags by hints files. It is a space separated list
3714 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3715 like libswanted..
af960fef 3716
781b178c 3717line (Loc.U):
ff935051 3718 This variable is defined but not used by Configure.
fcdf39cf 3719 The value is the empty string and is not useful.
781b178c
JH
3720
3721lint (Loc.U):
3722 This variable is defined but not used by Configure.
fcdf39cf 3723 The value is the empty string and is not useful.
781b178c
JH
3724
3725lkflags (ccflags.U):
3726 This variable contains any additional C partial linker flags desired by
3727 the user. It is up to the Makefile to use this.
3728
3729ln (Loc.U):
5bf26616 3730 This variable is used internally by Configure to determine the
781b178c
JH
3731 full pathname (if any) of the ln program. After Configure runs,
3732 the value is reset to a plain "ln" and is not useful.
3733
3734lns (lns.U):
635aebb7 3735 This variable holds the name of the command to make
781b178c
JH
3736 symbolic links (if they are supported). It can be used
3737 in the Makefile. It is either 'ln -s' or 'ln'
3738
10bc17b6
JH
3739localtime_r_proto (d_localtime_r.U):
3740 This variable encodes the prototype of localtime_r.
39183afa
JH
3741 It is zero if d_localtime_r is undef, and one of the
3742 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3743 is defined.
10bc17b6 3744
781b178c
JH
3745locincpth (ccflags.U):
3746 This variable contains a list of additional directories to be
3747 searched by the compiler. The appropriate '-I' directives will
3748 be added to ccflags. This is intended to simplify setting
3749 local directories from the Configure command line.
3750 It's not much, but it parallels the loclibpth stuff in libpth.U.
3751
3752loclibpth (libpth.U):
3753 This variable holds the paths (space-separated) used to find local
3754 libraries. It is prepended to libpth, and is intended to be easily
3755 set from the command line.
3756
3757longdblsize (d_longdbl.U):
3758 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3759 indicates to the C program how many bytes there are in a long double,
3760 if this system supports long doubles.
3761
3762longlongsize (d_longlong.U):
3763 This variable contains the value of the LONGLONGSIZE symbol, which
3764 indicates to the C program how many bytes there are in a long long,
3765 if this system supports long long.
3766
3767longsize (intsize.U):
3768 This variable contains the value of the LONGSIZE symbol, which
3769 indicates to the C program how many bytes there are in a long.
3770
3771lp (Loc.U):
3772 This variable is defined but not used by Configure.
fcdf39cf 3773 The value is the empty string and is not useful.
781b178c
JH
3774
3775lpr (Loc.U):
3776 This variable is defined but not used by Configure.
fcdf39cf 3777 The value is the empty string and is not useful.
781b178c
JH
3778
3779ls (Loc.U):
5bf26616 3780 This variable is used internally by Configure to determine the
781b178c
JH
3781 full pathname (if any) of the ls program. After Configure runs,
3782 the value is reset to a plain "ls" and is not useful.
3783
3784lseeksize (lseektype.U):
635aebb7 3785 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3786 or whatever type is used to declare lseek offset's type in the
3787 kernel (which also appears to be lseek's return type).
3788
3789lseektype (lseektype.U):
635aebb7 3790 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3791 or whatever type is used to declare lseek offset's type in the
3792 kernel (which also appears to be lseek's return type).
3793
d620c7b3 3794mad (mad.U):
a724edfe
NC
3795 This variable indicates that the Misc Attribute Definition code is to
3796 be compiled.
3797
52ca670a
MB
3798madlyh (mad.U):
3799 If the Misc Attribute Decoration is to be compiled, this variable is
3800 set to the name of the extra header files to be used, else it is ''
3801
3802madlyobj (mad.U):
3803 If the Misc Attribute Decoration is to be compiled, this variable is
3804 set to the name of the extra object files to be used, else it is ''
3805
3806madlysrc (mad.U):
3807 If the Misc Attribute Decoration is to be compiled, this variable is
3808 set to the name of the extra C source files to be used, else it is ''
3809
781b178c
JH
3810mail (Loc.U):
3811 This variable is defined but not used by Configure.
fcdf39cf 3812 The value is the empty string and is not useful.
781b178c
JH
3813
3814mailx (Loc.U):
3815 This variable is defined but not used by Configure.
fcdf39cf 3816 The value is the empty string and is not useful.
781b178c
JH
3817
3818make (Loc.U):
5bf26616 3819 This variable is used internally by Configure to determine the
c532c9d1
JH
3820 full pathname (if any) of the make program. After Configure runs,
3821 the value is reset to a plain "make" and is not useful.
3822
781b178c
JH
3823make_set_make (make.U):
3824 Some versions of 'make' set the variable MAKE. Others do not.
3825 This variable contains the string to be included in Makefile.SH
3826 so that MAKE is set if needed, and not if not needed.
3827 Possible values are:
44b94491 3828
781b178c 3829 make_set_make='#' # If your make program handles this for you,
44b94491 3830
781b178c 3831 make_set_make="MAKE=$make" # if it doesn't.
44b94491 3832
5bcaa86b 3833 This uses a comment character so that we can distinguish a
1d896104 3834 'set' value (from a previous config.sh or Configure '-D' option)
781b178c
JH
3835 from an uncomputed value.
3836
3837mallocobj (mallocsrc.U):
3838 This variable contains the name of the malloc.o that this package
3839 generates, if that malloc.o is preferred over the system malloc.