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Add sin6_scope_id probe (LeoNerd)
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1
2!!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3This file is built by metaconfig.
4
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5This file contains a description of all the shell variables whose value is
6determined by the Configure script. Variables intended for use in C
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7programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
8generates pod documentation for Config.pm from this file--please try to keep
24412007 9the formatting regular.]
d7418ba7 10
781b178c 11_a (Unix.U):
9285ede2 12 This variable defines the extension used for ordinary library files.
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13 For unix, it is '.a'. The '.' is included. Other possible
14 values include '.lib'.
15
16_exe (Unix.U):
17 This variable defines the extension used for executable files.
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18 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
19 On operating systems which do not require a specific extension
20 for executable files, this variable is empty.
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21
22_o (Unix.U):
23 This variable defines the extension used for object files.
24 For unix, it is '.o'. The '.' is included. Other possible
25 values include '.obj'.
26
27afs (afs.U):
28 This variable is set to 'true' if AFS (Andrew File System) is used
29 on the system, 'false' otherwise. It is possible to override this
30 with a hint value or command line option, but you'd better know
31 what you are doing.
32
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33afsroot (afs.U):
34 This variable is by default set to '/afs'. In the unlikely case
35 this is not the correct root, it is possible to override this with
36 a hint value or command line option. This will be used in subsequent
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.
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166
167byacc (Loc.U):
5bf26616 168 This variable is used internally by Configure to determine the
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169 full pathname (if any) of the byacc program. After Configure runs,
170 the value is reset to a plain "byacc" and is not useful.
171
172byteorder (byteorder.U):
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173 This variable holds the byte order in a UV. In the following,
174 larger digits indicate more significance. The variable byteorder
175 is either 4321 on a big-endian machine, or 1234 on a little-endian,
176 or 87654321 on a Cray ... or 3412 with weird order !
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177
178c (n.U):
179 This variable contains the \c string if that is what causes the echo
180 command to suppress newline. Otherwise it is null. Correct usage is
181 $echo $n "prompt for a question: $c".
182
183castflags (d_castneg.U):
184 This variable contains a flag that precise difficulties the
185 compiler has casting odd floating values to unsigned long:
186 0 = ok
187 1 = couldn't cast < 0
188 2 = couldn't cast >= 0x80000000
189 4 = couldn't cast in argument expression list
190
191cat (Loc.U):
5bf26616 192 This variable is used internally by Configure to determine the
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193 full pathname (if any) of the cat program. After Configure runs,
194 the value is reset to a plain "cat" and is not useful.
195
196cc (cc.U):
197 This variable holds the name of a command to execute a C compiler which
198 can resolve multiple global references that happen to have the same
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199 name. Usual values are 'cc' and 'gcc'.
200 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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201
202cccdlflags (dlsrc.U):
203 This variable contains any special flags that might need to be
204 passed with 'cc -c' to compile modules to be used to create a shared
205 library that will be used for dynamic loading. For hpux, this
206 should be +z. It is up to the makefile to use it.
207
208ccdlflags (dlsrc.U):
209 This variable contains any special flags that might need to be
210 passed to cc to link with a shared library for dynamic loading.
211 It is up to the makefile to use it. For sunos 4.1, it should
212 be empty.
213
214ccflags (ccflags.U):
215 This variable contains any additional C compiler flags desired by
216 the user. It is up to the Makefile to use this.
217
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218ccflags_uselargefiles (uselfs.U):
219 This variable contains the compiler flags needed by large file builds
220 and added to ccflags by hints files.
221
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222ccname (Checkcc.U):
223 This can set either by hints files or by Configure. If using
224 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
225 Some platforms, however, make good use of this by storing the
226 flavor of the C compiler being used here. For example if using
227 the Sun WorkShop suite, ccname will be 'workshop'.
228
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229ccsymbols (Cppsym.U):
230 The variable contains the symbols defined by the C compiler alone.
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231 The symbols defined by cpp or by cc when it calls cpp are not in
232 this list, see cppsymbols and cppccsymbols.
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233 The list is a space-separated list of symbol=value tokens.
234
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235ccversion (Checkcc.U):
236 This can set either by hints files or by Configure. If using
237 a (non-gcc) vendor cc, this variable may contain a version for
238 the compiler.
239
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240cf_by (cf_who.U):
241 Login name of the person who ran the Configure script and answered the
242 questions. This is used to tag both config.sh and config_h.SH.
243
244cf_email (cf_email.U):
245 Electronic mail address of the person who ran Configure. This can be
246 used by units that require the user's e-mail, like MailList.U.
247
248cf_time (cf_who.U):
249 Holds the output of the "date" command when the configuration file was
250 produced. This is used to tag both config.sh and config_h.SH.
251
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252charbits (charsize.U):
253 This variable contains the value of the CHARBITS symbol, which
254 indicates to the C program how many bits there are in a character.
255
256charsize (charsize.U):
257 This variable contains the value of the CHARSIZE symbol, which
258 indicates to the C program how many bytes there are in a character.
259
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260chgrp (Loc.U):
261 This variable is defined but not used by Configure.
fcdf39cf 262 The value is the empty string and is not useful.
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263
264chmod (Loc.U):
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265 This variable is used internally by Configure to determine the
266 full pathname (if any) of the chmod program. After Configure runs,
267 the value is reset to a plain "chmod" and is not useful.
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268
269chown (Loc.U):
270 This variable is defined but not used by Configure.
fcdf39cf 271 The value is the empty string and is not useful.
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272
273clocktype (d_times.U):
274 This variable holds the type returned by times(). It can be long,
275 or clock_t on BSD sites (in which case <sys/types.h> should be
276 included).
277
278comm (Loc.U):
5bf26616 279 This variable is used internally by Configure to determine the
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280 full pathname (if any) of the comm program. After Configure runs,
281 the value is reset to a plain "comm" and is not useful.
282
283compress (Loc.U):
284 This variable is defined but not used by Configure.
fcdf39cf 285 The value is the empty string and is not useful.
781b178c 286
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287config_arg0 (Options.U):
288 This variable contains the string used to invoke the Configure
289 command, as reported by the shell in the $0 variable.
290
291config_argc (Options.U):
292 This variable countains the number of command-line arguments
293 passed to Configure, as reported by the shell in the $# variable.
294 The individual arguments are stored as variables config_argc1,
295 config_argc2, etc.
296
297config_args (Options.U):
298 This variable contains a single string giving the command-line
299 arguments passed to Configure. Spaces within arguments,
300 quotes, and escaped characters are not correctly preserved.
301 To reconstruct the command line, you must assemble the individual
302 command line pieces, given in config_arg[0-9]*.
303
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304contains (contains.U):
305 This variable holds the command to do a grep with a proper return
306 status. On most sane systems it is simply "grep". On insane systems
307 it is a grep followed by a cat followed by a test. This variable
308 is primarily for the use of other Configure units.
309
310cp (Loc.U):
5bf26616 311 This variable is used internally by Configure to determine the
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312 full pathname (if any) of the cp program. After Configure runs,
313 the value is reset to a plain "cp" and is not useful.
314
315cpio (Loc.U):
316 This variable is defined but not used by Configure.
fcdf39cf 317 The value is the empty string and is not useful.
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318
319cpp (Loc.U):
5bf26616 320 This variable is used internally by Configure to determine the
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321 full pathname (if any) of the cpp program. After Configure runs,
322 the value is reset to a plain "cpp" and is not useful.
323
324cpp_stuff (cpp_stuff.U):
505656d3 325 This variable contains an identification of the concatenation mechanism
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326 used by the C preprocessor.
327
328cppccsymbols (Cppsym.U):
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329 The variable contains the symbols defined by the C compiler
330 when it calls cpp. The symbols defined by the cc alone or cpp
331 alone are not in this list, see ccsymbols and cppsymbols.
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332 The list is a space-separated list of symbol=value tokens.
333
334cppflags (ccflags.U):
335 This variable holds the flags that will be passed to the C pre-
336 processor. It is up to the Makefile to use it.
337
338cpplast (cppstdin.U):
339 This variable has the same functionality as cppminus, only it applies
340 to cpprun and not cppstdin.
341
342cppminus (cppstdin.U):
343 This variable contains the second part of the string which will invoke
344 the C preprocessor on the standard input and produce to standard
345 output. This variable will have the value "-" if cppstdin needs
346 a minus to specify standard input, otherwise the value is "".
347
348cpprun (cppstdin.U):
349 This variable contains the command which will invoke a C preprocessor
350 on standard input and put the output to stdout. It is guaranteed not
351 to be a wrapper and may be a null string if no preprocessor can be
352 made directly available. This preprocessor might be different from the
353 one used by the C compiler. Don't forget to append cpplast after the
354 preprocessor options.
355
356cppstdin (cppstdin.U):
357 This variable contains the command which will invoke the C
358 preprocessor on standard input and put the output to stdout.
359 It is primarily used by other Configure units that ask about
360 preprocessor symbols.
361
362cppsymbols (Cppsym.U):
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363 The variable contains the symbols defined by the C preprocessor
364 alone. The symbols defined by cc or by cc when it calls cpp are
365 not in this list, see ccsymbols and cppccsymbols.
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366 The list is a space-separated list of symbol=value tokens.
367
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368crypt_r_proto (d_crypt_r.U):
369 This variable encodes the prototype of crypt_r.
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370 It is zero if d_crypt_r is undef, and one of the
371 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
372 is defined.
10bc17b6 373
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374cryptlib (d_crypt.U):
375 This variable holds -lcrypt or the path to a libcrypt.a archive if
376 the crypt() function is not defined in the standard C library. It is
377 up to the Makefile to use this.
378
379csh (Loc.U):
5bf26616 380 This variable is used internally by Configure to determine the
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381 full pathname (if any) of the csh program. After Configure runs,
382 the value is reset to a plain "csh" and is not useful.
383
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384ctermid_r_proto (d_ctermid_r.U):
385 This variable encodes the prototype of ctermid_r.
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386 It is zero if d_ctermid_r is undef, and one of the
387 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
388 is defined.
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389
390ctime_r_proto (d_ctime_r.U):
391 This variable encodes the prototype of ctime_r.
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392 It is zero if d_ctime_r is undef, and one of the
393 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
394 is defined.
10bc17b6 395
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396d__fwalk (d__fwalk.U):
397 This variable conditionally defines HAS__FWALK if _fwalk() is
398 available to apply a function to all the file handles.
399
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400d_access (d_access.U):
401 This variable conditionally defines HAS_ACCESS if the access() system
402 call is available to check for access permissions using real IDs.
403
404d_accessx (d_accessx.U):
405 This variable conditionally defines the HAS_ACCESSX symbol, which
406 indicates to the C program that the accessx() routine is available.
407
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408d_aintl (d_aintl.U):
409 This variable conditionally defines the HAS_AINTL symbol, which
410 indicates to the C program that the aintl() routine is available.
411 If copysignl is also present we can emulate modfl.
412
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413d_alarm (d_alarm.U):
414 This variable conditionally defines the HAS_ALARM symbol, which
415 indicates to the C program that the alarm() routine is available.
416
417d_archlib (archlib.U):
418 This variable conditionally defines ARCHLIB to hold the pathname
419 of architecture-dependent library files for $package. If
420 $archlib is the same as $privlib, then this is set to undef.
421
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422d_asctime64 (d_timefuncs64.U):
423 This variable conditionally defines the HAS_ASCTIME64 symbol, which
424 indicates to the C program that the asctime64 () routine is available.
425
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426d_asctime_r (d_asctime_r.U):
427 This variable conditionally defines the HAS_ASCTIME_R symbol,
428 which indicates to the C program that the asctime_r()
429 routine is available.
430
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431d_atolf (atolf.U):
432 This variable conditionally defines the HAS_ATOLF symbol, which
433 indicates to the C program that the atolf() routine is available.
434
435d_atoll (atoll.U):
436 This variable conditionally defines the HAS_ATOLL symbol, which
437 indicates to the C program that the atoll() routine is available.
438
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439d_attribute_deprecated (d_attribut.U):
440 This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
441 indicates that GCC can handle the attribute for marking deprecated
442 APIs
443
df4c34dc 444d_attribute_format (d_attribut.U):
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445 This variable conditionally defines HASATTRIBUTE_FORMAT, which
446 indicates the C compiler can check for printf-like formats.
447
df4c34dc 448d_attribute_malloc (d_attribut.U):
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449 This variable conditionally defines HASATTRIBUTE_MALLOC, which
450 indicates the C compiler can understand functions as having
451 malloc-like semantics.
452
df4c34dc 453d_attribute_nonnull (d_attribut.U):
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454 This variable conditionally defines HASATTRIBUTE_NONNULL, which
455 indicates that the C compiler can know that certain arguments
456 must not be NULL, and will check accordingly at compile time.
457
df4c34dc 458d_attribute_noreturn (d_attribut.U):
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459 This variable conditionally defines HASATTRIBUTE_NORETURN, which
460 indicates that the C compiler can know that certain functions
461 are guaranteed never to return.
462
df4c34dc 463d_attribute_pure (d_attribut.U):
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464 This variable conditionally defines HASATTRIBUTE_PURE, which
465 indicates that the C compiler can know that certain functions
466 are "pure" functions, meaning that they have no side effects, and
467 only rely on function input and/or global data for their results.
468
df4c34dc 469d_attribute_unused (d_attribut.U):
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470 This variable conditionally defines HASATTRIBUTE_UNUSED, which
471 indicates that the C compiler can know that certain variables
472 and arguments may not always be used, and to not throw warnings
473 if they don't get used.
474
df4c34dc 475d_attribute_warn_unused_result (d_attribut.U):
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476 This variable conditionally defines
477 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
478 compiler can know that certain functions have a return values
479 that must not be ignored, such as malloc() or open().
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480
481d_bcmp (d_bcmp.U):
482 This variable conditionally defines the HAS_BCMP symbol if
483 the bcmp() routine is available to compare strings.
484
485d_bcopy (d_bcopy.U):
486 This variable conditionally defines the HAS_BCOPY symbol if
487 the bcopy() routine is available to copy strings.
488
489d_bsd (Guess.U):
490 This symbol conditionally defines the symbol BSD when running on a
491 BSD system.
492
493d_bsdgetpgrp (d_getpgrp.U):
494 This variable conditionally defines USE_BSD_GETPGRP if
495 getpgrp needs one arguments whereas USG one needs none.
496
497d_bsdsetpgrp (d_setpgrp.U):
498 This variable conditionally defines USE_BSD_SETPGRP if
499 setpgrp needs two arguments whereas USG one needs none.
500 See also d_setpgid for a POSIX interface.
501
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502d_builtin_choose_expr (d_builtin.U):
503 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
504 indicates that the compiler supports __builtin_choose_expr(x,y,z).
505 This built-in function is analogous to the "x?y:z" operator in C,
506 except that the expression returned has its type unaltered by
507 promotion rules. Also, the built-in function does not evaluate
508 the expression that was not chosen.
509
510d_builtin_expect (d_builtin.U):
511 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
512 that the compiler supports __builtin_expect(exp,c). You may use
513 __builtin_expect to provide the compiler with branch prediction
514 information.
515
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516d_bzero (d_bzero.U):
517 This variable conditionally defines the HAS_BZERO symbol if
518 the bzero() routine is available to set memory to 0.
519
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520d_c99_variadic_macros (d_c99_variadic.U):
521 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
522 symbol, which indicates to the C program that C99 variadic macros
523 are available.
524
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525d_casti32 (d_casti32.U):
526 This variable conditionally defines CASTI32, which indicates
527 whether the C compiler can cast large floats to 32-bit ints.
528
529d_castneg (d_castneg.U):
530 This variable conditionally defines CASTNEG, which indicates
531 wether the C compiler can cast negative float to unsigned.
532
533d_charvspr (d_vprintf.U):
534 This variable conditionally defines CHARVSPRINTF if this system
535 has vsprintf returning type (char*). The trend seems to be to
536 declare it as "int vsprintf()".
537
538d_chown (d_chown.U):
539 This variable conditionally defines the HAS_CHOWN symbol, which
540 indicates to the C program that the chown() routine is available.
541
542d_chroot (d_chroot.U):
543 This variable conditionally defines the HAS_CHROOT symbol, which
544 indicates to the C program that the chroot() routine is available.
545
546d_chsize (d_chsize.U):
547 This variable conditionally defines the CHSIZE symbol, which
548 indicates to the C program that the chsize() routine is available
549 to truncate files. You might need a -lx to get this routine.
550
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551d_class (d_class.U):
552 This variable conditionally defines the HAS_CLASS symbol, which
553 indicates to the C program that the class() routine is available.
554
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555d_clearenv (d_clearenv.U):
556 This variable conditionally defines the HAS_CLEARENV symbol, which
557 indicates to the C program that the clearenv () routine is available.
558
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559d_closedir (d_closedir.U):
560 This variable conditionally defines HAS_CLOSEDIR if closedir() is
561 available.
562
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563d_cmsghdr_s (d_cmsghdr_s.U):
564 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
565 which indicates that the struct cmsghdr is supported.
566
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567d_const (d_const.U):
568 This variable conditionally defines the HASCONST symbol, which
569 indicates to the C program that this C compiler knows about the
570 const type.
571
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572d_copysignl (d_copysignl.U):
573 This variable conditionally defines the HAS_COPYSIGNL symbol, which
574 indicates to the C program that the copysignl() routine is available.
575 If aintl is also present we can emulate modfl.
576
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577d_cplusplus (d_cplusplus.U):
578 This variable conditionally defines the USE_CPLUSPLUS symbol, which
579 indicates that a C++ compiler was used to compiled Perl and will be
580 used to compile extensions.
581
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582d_crypt (d_crypt.U):
583 This variable conditionally defines the CRYPT symbol, which
584 indicates to the C program that the crypt() routine is available
585 to encrypt passwords and the like.
586
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587d_crypt_r (d_crypt_r.U):
588 This variable conditionally defines the HAS_CRYPT_R symbol,
589 which indicates to the C program that the crypt_r()
590 routine is available.
591
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592d_csh (d_csh.U):
593 This variable conditionally defines the CSH symbol, which
594 indicates to the C program that the C-shell exists.
595
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596d_ctermid (d_ctermid.U):
597 This variable conditionally defines CTERMID if ctermid() is
598 available to generate filename for terminal.
599
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600d_ctermid_r (d_ctermid_r.U):
601 This variable conditionally defines the HAS_CTERMID_R symbol,
602 which indicates to the C program that the ctermid_r()
603 routine is available.
604
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605d_ctime64 (d_timefuncs64.U):
606 This variable conditionally defines the HAS_CTIME64 symbol, which
607 indicates to the C program that the ctime64 () routine is available.
608
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609d_ctime_r (d_ctime_r.U):
610 This variable conditionally defines the HAS_CTIME_R symbol,
611 which indicates to the C program that the ctime_r()
612 routine is available.
613
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614d_cuserid (d_cuserid.U):
615 This variable conditionally defines the HAS_CUSERID symbol, which
616 indicates to the C program that the cuserid() routine is available
617 to get character login names.
618
619d_dbl_dig (d_dbl_dig.U):
620 This variable conditionally defines d_dbl_dig if this system's
621 header files provide DBL_DIG, which is the number of significant
622 digits in a double precision number.
623
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624d_dbminitproto (d_dbminitproto.U):
625 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
626 which indicates to the C program that the system provides
627 a prototype for the dbminit() function. Otherwise, it is
628 up to the program to supply one.
629
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630d_difftime (d_difftime.U):
631 This variable conditionally defines the HAS_DIFFTIME symbol, which
632 indicates to the C program that the difftime() routine is available.
633
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634d_difftime64 (d_timefuncs64.U):
635 This variable conditionally defines the HAS_DIFFTIME64 symbol, which
636 indicates to the C program that the difftime64 () routine is available.
637
066e7355 638d_dir_dd_fd (d_dir_dd_fd.U):
de52168c
SP
639 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
640 indicates that the DIR directory stream type contains a member
641 variable called dd_fd.
642
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643d_dirfd (d_dirfd.U):
644 This variable conditionally defines the HAS_DIRFD constant,
645 which indicates to the C program that dirfd() is available
646 to return the file descriptor of a directory stream.
647
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648d_dirnamlen (i_dirent.U):
649 This variable conditionally defines DIRNAMLEN, which indicates
650 to the C program that the length of directory entry names is
651 provided by a d_namelen field.
652
653d_dlerror (d_dlerror.U):
654 This variable conditionally defines the HAS_DLERROR symbol, which
655 indicates to the C program that the dlerror() routine is available.
656
657d_dlopen (d_dlopen.U):
658 This variable conditionally defines the HAS_DLOPEN symbol, which
659 indicates to the C program that the dlopen() routine is available.
660
661d_dlsymun (d_dlsymun.U):
662 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
663 indicates that we need to prepend an underscore to the symbol
664 name before calling dlsym().
665
666d_dosuid (d_dosuid.U):
667 This variable conditionally defines the symbol DOSUID, which
668 tells the C program that it should insert setuid emulation code
669 on hosts which have setuid #! scripts disabled.
670
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671d_drand48_r (d_drand48_r.U):
672 This variable conditionally defines the HAS_DRAND48_R symbol,
673 which indicates to the C program that the drand48_r()
674 routine is available.
675
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676d_drand48proto (d_drand48proto.U):
677 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
678 which indicates to the C program that the system provides
679 a prototype for the drand48() function. Otherwise, it is
680 up to the program to supply one.
681
682d_dup2 (d_dup2.U):
683 This variable conditionally defines HAS_DUP2 if dup2() is
684 available to duplicate file descriptors.
685
686d_eaccess (d_eaccess.U):
687 This variable conditionally defines the HAS_EACCESS symbol, which
688 indicates to the C program that the eaccess() routine is available.
689
690d_endgrent (d_endgrent.U):
691 This variable conditionally defines the HAS_ENDGRENT symbol, which
692 indicates to the C program that the endgrent() routine is available
693 for sequential access of the group database.
694
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695d_endgrent_r (d_endgrent_r.U):
696 This variable conditionally defines the HAS_ENDGRENT_R symbol,
697 which indicates to the C program that the endgrent_r()
698 routine is available.
699
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700d_endhent (d_endhent.U):
701 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
702 available to close whatever was being used for host queries.
703
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704d_endhostent_r (d_endhostent_r.U):
705 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
706 which indicates to the C program that the endhostent_r()
707 routine is available.
708
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709d_endnent (d_endnent.U):
710 This variable conditionally defines HAS_ENDNETENT if endnetent() is
711 available to close whatever was being used for network queries.
712
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713d_endnetent_r (d_endnetent_r.U):
714 This variable conditionally defines the HAS_ENDNETENT_R symbol,
715 which indicates to the C program that the endnetent_r()
716 routine is available.
717
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718d_endpent (d_endpent.U):
719 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
720 available to close whatever was being used for protocol queries.
721
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722d_endprotoent_r (d_endprotoent_r.U):
723 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
724 which indicates to the C program that the endprotoent_r()
725 routine is available.
726
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727d_endpwent (d_endpwent.U):
728 This variable conditionally defines the HAS_ENDPWENT symbol, which
729 indicates to the C program that the endpwent() routine is available
730 for sequential access of the passwd database.
731
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732d_endpwent_r (d_endpwent_r.U):
733 This variable conditionally defines the HAS_ENDPWENT_R symbol,
734 which indicates to the C program that the endpwent_r()
735 routine is available.
736
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737d_endsent (d_endsent.U):
738 This variable conditionally defines HAS_ENDSERVENT if endservent() is
739 available to close whatever was being used for service queries.
740
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741d_endservent_r (d_endservent_r.U):
742 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
743 which indicates to the C program that the endservent_r()
744 routine is available.
745
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746d_eofnblk (nblock_io.U):
747 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
748 when reading from a non-blocking I/O source.
749
750d_eunice (Guess.U):
751 This variable conditionally defines the symbols EUNICE and VAX, which
752 alerts the C program that it must deal with ideosyncracies of VMS.
753
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754d_faststdio (d_faststdio.U):
755 This variable conditionally defines the HAS_FAST_STDIO symbol,
756 which indicates to the C program that the "fast stdio" is available
757 to manipulate the stdio buffers directly.
758
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759d_fchdir (d_fchdir.U):
760 This variable conditionally defines the HAS_FCHDIR symbol, which
761 indicates to the C program that the fchdir() routine is available.
762
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763d_fchmod (d_fchmod.U):
764 This variable conditionally defines the HAS_FCHMOD symbol, which
765 indicates to the C program that the fchmod() routine is available
766 to change mode of opened files.
767
768d_fchown (d_fchown.U):
769 This variable conditionally defines the HAS_FCHOWN symbol, which
770 indicates to the C program that the fchown() routine is available
771 to change ownership of opened files.
772
773d_fcntl (d_fcntl.U):
774 This variable conditionally defines the HAS_FCNTL symbol, and indicates
775 whether the fcntl() function exists
776
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777d_fcntl_can_lock (d_fcntl_can_lock.U):
778 This variable conditionally defines the FCNTL_CAN_LOCK symbol
779 and indicates whether file locking with fcntl() works.
780
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781d_fd_macros (d_fd_set.U):
782 This variable contains the eventual value of the HAS_FD_MACROS symbol,
783 which indicates if your C compiler knows about the macros which
784 manipulate an fd_set.
785
786d_fd_set (d_fd_set.U):
787 This variable contains the eventual value of the HAS_FD_SET symbol,
788 which indicates if your C compiler knows about the fd_set typedef.
789
790d_fds_bits (d_fd_set.U):
791 This variable contains the eventual value of the HAS_FDS_BITS symbol,
792 which indicates if your fd_set typedef contains the fds_bits member.
793 If you have an fd_set typedef, but the dweebs who installed it did
794 a half-fast job and neglected to provide the macros to manipulate
795 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
796
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797d_fgetpos (d_fgetpos.U):
798 This variable conditionally defines HAS_FGETPOS if fgetpos() is
799 available to get the file position indicator.
800
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801d_finite (d_finite.U):
802 This variable conditionally defines the HAS_FINITE symbol, which
803 indicates to the C program that the finite() routine is available.
804
805d_finitel (d_finitel.U):
806 This variable conditionally defines the HAS_FINITEL symbol, which
807 indicates to the C program that the finitel() routine is available.
808
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809d_flexfnam (d_flexfnam.U):
810 This variable conditionally defines the FLEXFILENAMES symbol, which
811 indicates that the system supports filenames longer than 14 characters.
812
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813d_flock (d_flock.U):
814 This variable conditionally defines HAS_FLOCK if flock() is
815 available to do file locking.
816
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817d_flockproto (d_flockproto.U):
818 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
819 which indicates to the C program that the system provides
820 a prototype for the flock() function. Otherwise, it is
821 up to the program to supply one.
822
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823d_fork (d_fork.U):
824 This variable conditionally defines the HAS_FORK symbol, which
825 indicates to the C program that the fork() routine is available.
826
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827d_fp_class (d_fp_class.U):
828 This variable conditionally defines the HAS_FP_CLASS symbol, which
829 indicates to the C program that the fp_class() routine is available.
830
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831d_fpathconf (d_pathconf.U):
832 This variable conditionally defines the HAS_FPATHCONF symbol, which
833 indicates to the C program that the pathconf() routine is available
834 to determine file-system related limits and options associated
835 with a given open file descriptor.
836
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837d_fpclass (d_fpclass.U):
838 This variable conditionally defines the HAS_FPCLASS symbol, which
839 indicates to the C program that the fpclass() routine is available.
840
841d_fpclassify (d_fpclassify.U):
842 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
843 indicates to the C program that the fpclassify() routine is available.
844
845d_fpclassl (d_fpclassl.U):
846 This variable conditionally defines the HAS_FPCLASSL symbol, which
847 indicates to the C program that the fpclassl() routine is available.
848
c890dc6c 849d_fpos64_t (d_fpos64_t.U):
ca24dfc6 850 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 851
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852d_frexpl (d_frexpl.U):
853 This variable conditionally defines the HAS_FREXPL symbol, which
854 indicates to the C program that the frexpl() routine is available.
855
ad27e871 856d_fs_data_s (d_fs_data_s.U):
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JH
857 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
858 which indicates that the struct fs_data is supported.
859
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860d_fseeko (d_fseeko.U):
861 This variable conditionally defines the HAS_FSEEKO symbol, which
862 indicates to the C program that the fseeko() routine is available.
863
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864d_fsetpos (d_fsetpos.U):
865 This variable conditionally defines HAS_FSETPOS if fsetpos() is
866 available to set the file position indicator.
867
0545a864 868d_fstatfs (d_fstatfs.U):
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869 This variable conditionally defines the HAS_FSTATFS symbol, which
870 indicates to the C program that the fstatfs() routine is available.
871
872d_fstatvfs (d_statvfs.U):
873 This variable conditionally defines the HAS_FSTATVFS symbol, which
874 indicates to the C program that the fstatvfs() routine is available.
875
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876d_fsync (d_fsync.U):
877 This variable conditionally defines the HAS_FSYNC symbol, which
878 indicates to the C program that the fsync() routine is available.
879
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880d_ftello (d_ftello.U):
881 This variable conditionally defines the HAS_FTELLO symbol, which
882 indicates to the C program that the ftello() routine is available.
883
884d_ftime (d_ftime.U):
885 This variable conditionally defines the HAS_FTIME symbol, which indicates
886 that the ftime() routine exists. The ftime() routine is basically
887 a sub-second accuracy clock.
888
df4c34dc 889d_futimes (d_futimes.U):
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890 This variable conditionally defines the HAS_FUTIMES symbol, which
891 indicates to the C program that the futimes() routine is available.
892
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893d_Gconvert (d_gconvert.U):
894 This variable holds what Gconvert is defined as to convert
895 floating point numbers into strings. By default, Configure
896 sets this macro to use the first of gconvert, gcvt, or sprintf
897 that pass sprintf-%g-like behaviour tests. If perl is using
898 long doubles, the macro uses the first of the following
899 functions that pass Configure's tests: qgcvt, sprintf (if
900 Configure knows how to make sprintf format long doubles--see
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901 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
902 The gconvert_preference and gconvert_ld_preference variables
4d54317a 903 can be used to alter Configure's preferences, for doubles and
635aebb7
AL
904 long doubles, respectively. If present, they contain a
905 space-separated list of one or more of the above function
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JH
906 names in the order they should be tried.
907
908 d_Gconvert may be set to override Configure with a platform-
909 specific function. If this function expects a double, a
910 different value may need to be set by the uselongdouble.cbu
911 call-back unit so that long doubles can be formatted without
912 loss of precision.
913
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914d_gdbm_ndbm_h_uses_prototypes (i_ndbm.U):
915 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
916 which indicates that the gdbm-ndbm.h include file uses real ANSI C
917 prototypes instead of K&R style function declarations. K&R style
918 declarations are unsupported in C++, so the include file requires
919 special handling when using a C++ compiler and this variable is
920 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
921 to get the same information for alternative ndbm.h include files.
922
923d_gdbmndbm_h_uses_prototypes (i_ndbm.U):
924 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
925 which indicates that the gdbm/ndbm.h include file uses real ANSI C
926 prototypes instead of K&R style function declarations. K&R style
927 declarations are unsupported in C++, so the include file requires
928 special handling when using a C++ compiler and this variable is
929 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
930 to get the same information for alternative ndbm.h include files.
931
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932d_getaddrinfo (d_getaddrinfo.U):
933 This variable conditionally defines the HAS_GETADDRINFO symbol,
934 which indicates to the C program that the getaddrinfo() function
935 is available.
936
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937d_getcwd (d_getcwd.U):
938 This variable conditionally defines the HAS_GETCWD symbol, which
939 indicates to the C program that the getcwd() routine is available
940 to get the current working directory.
941
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942d_getespwnam (d_getespwnam.U):
943 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
944 available to retrieve enchanced (shadow) password entries by name.
945
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946d_getfsstat (d_getfsstat.U):
947 This variable conditionally defines the HAS_GETFSSTAT symbol, which
948 indicates to the C program that the getfsstat() routine is available.
949
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950d_getgrent (d_getgrent.U):
951 This variable conditionally defines the HAS_GETGRENT symbol, which
952 indicates to the C program that the getgrent() routine is available
953 for sequential access of the group database.
954
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955d_getgrent_r (d_getgrent_r.U):
956 This variable conditionally defines the HAS_GETGRENT_R symbol,
957 which indicates to the C program that the getgrent_r()
958 routine is available.
959
960d_getgrgid_r (d_getgrgid_r.U):
961 This variable conditionally defines the HAS_GETGRGID_R symbol,
962 which indicates to the C program that the getgrgid_r()
963 routine is available.
964
965d_getgrnam_r (d_getgrnam_r.U):
966 This variable conditionally defines the HAS_GETGRNAM_R symbol,
967 which indicates to the C program that the getgrnam_r()
968 routine is available.
969
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970d_getgrps (d_getgrps.U):
971 This variable conditionally defines the HAS_GETGROUPS symbol, which
972 indicates to the C program that the getgroups() routine is available
973 to get the list of process groups.
974
975d_gethbyaddr (d_gethbyad.U):
976 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
977 indicates to the C program that the gethostbyaddr() routine is available
978 to look up hosts by their IP addresses.
979
980d_gethbyname (d_gethbynm.U):
981 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
982 indicates to the C program that the gethostbyname() routine is available
983 to look up host names in some data base or other.
984
985d_gethent (d_gethent.U):
986 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
987 available to look up host names in some data base or another.
988
989d_gethname (d_gethname.U):
990 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
991 indicates to the C program that the gethostname() routine may be
992 used to derive the host name.
993
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994d_gethostbyaddr_r (d_gethostbyaddr_r.U):
995 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
996 which indicates to the C program that the gethostbyaddr_r()
997 routine is available.
998
999d_gethostbyname_r (d_gethostbyname_r.U):
1000 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
1001 which indicates to the C program that the gethostbyname_r()
1002 routine is available.
1003
1004d_gethostent_r (d_gethostent_r.U):
1005 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
1006 which indicates to the C program that the gethostent_r()
1007 routine is available.
1008
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1009d_gethostprotos (d_gethostprotos.U):
1010 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
1011 which indicates to the C program that <netdb.h> supplies
635aebb7 1012 prototypes for the various gethost*() functions.
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1013 See also netdbtype.U for probing for various netdb types.
1014
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1015d_getitimer (d_getitimer.U):
1016 This variable conditionally defines the HAS_GETITIMER symbol, which
1017 indicates to the C program that the getitimer() routine is available.
1018
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1019d_getlogin (d_getlogin.U):
1020 This variable conditionally defines the HAS_GETLOGIN symbol, which
1021 indicates to the C program that the getlogin() routine is available
1022 to get the login name.
1023
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1024d_getlogin_r (d_getlogin_r.U):
1025 This variable conditionally defines the HAS_GETLOGIN_R symbol,
1026 which indicates to the C program that the getlogin_r()
1027 routine is available.
1028
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1029d_getmnt (d_getmnt.U):
1030 This variable conditionally defines the HAS_GETMNT symbol, which
1031 indicates to the C program that the getmnt() routine is available
1032 to retrieve one or more mount info blocks by filename.
1033
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1034d_getmntent (d_getmntent.U):
1035 This variable conditionally defines the HAS_GETMNTENT symbol, which
1036 indicates to the C program that the getmntent() routine is available
0617aed7 1037 to iterate through mounted files to get their mount info.
781b178c 1038
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1039d_getnameinfo (d_getnameinfo.U):
1040 This variable conditionally defines the HAS_GETNAMEINFO symbol,
1041 which indicates to the C program that the getnameinfo() function
1042 is available.
1043
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1044d_getnbyaddr (d_getnbyad.U):
1045 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
1046 indicates to the C program that the getnetbyaddr() routine is available
1047 to look up networks by their IP addresses.
1048
1049d_getnbyname (d_getnbynm.U):
1050 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
1051 indicates to the C program that the getnetbyname() routine is available
1052 to look up networks by their names.
1053
1054d_getnent (d_getnent.U):
1055 This variable conditionally defines HAS_GETNETENT if getnetent() is
1056 available to look up network names in some data base or another.
1057
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1058d_getnetbyaddr_r (d_getnetbyaddr_r.U):
1059 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
1060 which indicates to the C program that the getnetbyaddr_r()
1061 routine is available.
1062
1063d_getnetbyname_r (d_getnetbyname_r.U):
1064 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
1065 which indicates to the C program that the getnetbyname_r()
1066 routine is available.
1067
1068d_getnetent_r (d_getnetent_r.U):
1069 This variable conditionally defines the HAS_GETNETENT_R symbol,
1070 which indicates to the C program that the getnetent_r()
1071 routine is available.
1072
781b178c
JH
1073d_getnetprotos (d_getnetprotos.U):
1074 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1075 which indicates to the C program that <netdb.h> supplies
635aebb7 1076 prototypes for the various getnet*() functions.
781b178c
JH
1077 See also netdbtype.U for probing for various netdb types.
1078
0c0643d0
JH
1079d_getpagsz (d_getpagsz.U):
1080 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1081 is available to get the system page size.
1082
781b178c 1083d_getpbyname (d_getprotby.U):
635aebb7
AL
1084 This variable conditionally defines the HAS_GETPROTOBYNAME
1085 symbol, which indicates to the C program that the
781b178c
JH
1086 getprotobyname() routine is available to look up protocols
1087 by their name.
1088
1089d_getpbynumber (d_getprotby.U):
635aebb7
AL
1090 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1091 symbol, which indicates to the C program that the
781b178c
JH
1092 getprotobynumber() routine is available to look up protocols
1093 by their number.
1094
1095d_getpent (d_getpent.U):
1096 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1097 available to look up protocols in some data base or another.
1098
1099d_getpgid (d_getpgid.U):
1100 This variable conditionally defines the HAS_GETPGID symbol, which
1101 indicates to the C program that the getpgid(pid) function
1102 is available to get the process group id.
1103
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MB
1104d_getpgrp (d_getpgrp.U):
1105 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1106 available to get the current process group.
1107
781b178c
JH
1108d_getpgrp2 (d_getpgrp2.U):
1109 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1110 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1111 is available to get the current process group.
1112
781b178c
JH
1113d_getppid (d_getppid.U):
1114 This variable conditionally defines the HAS_GETPPID symbol, which
1115 indicates to the C program that the getppid() routine is available
1116 to get the parent process ID.
1117
1118d_getprior (d_getprior.U):
1119 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1120 is available to get a process's priority.
1121
10bc17b6
JH
1122d_getprotobyname_r (d_getprotobyname_r.U):
1123 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1124 which indicates to the C program that the getprotobyname_r()
1125 routine is available.
1126
1127d_getprotobynumber_r (d_getprotobynumber_r.U):
1128 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1129 which indicates to the C program that the getprotobynumber_r()
1130 routine is available.
1131
1132d_getprotoent_r (d_getprotoent_r.U):
1133 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1134 which indicates to the C program that the getprotoent_r()
1135 routine is available.
1136
781b178c
JH
1137d_getprotoprotos (d_getprotoprotos.U):
1138 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1139 which indicates to the C program that <netdb.h> supplies
635aebb7 1140 prototypes for the various getproto*() functions.
781b178c
JH
1141 See also netdbtype.U for probing for various netdb types.
1142
3813c136
JH
1143d_getprpwnam (d_getprpwnam.U):
1144 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1145 available to retrieve protected (shadow) password entries by name.
1146
781b178c
JH
1147d_getpwent (d_getpwent.U):
1148 This variable conditionally defines the HAS_GETPWENT symbol, which
1149 indicates to the C program that the getpwent() routine is available
1150 for sequential access of the passwd database.
1151
10bc17b6
JH
1152d_getpwent_r (d_getpwent_r.U):
1153 This variable conditionally defines the HAS_GETPWENT_R symbol,
1154 which indicates to the C program that the getpwent_r()
1155 routine is available.
1156
1157d_getpwnam_r (d_getpwnam_r.U):
1158 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1159 which indicates to the C program that the getpwnam_r()
1160 routine is available.
1161
1162d_getpwuid_r (d_getpwuid_r.U):
1163 This variable conditionally defines the HAS_GETPWUID_R symbol,
1164 which indicates to the C program that the getpwuid_r()
1165 routine is available.
1166
781b178c 1167d_getsbyname (d_getsrvby.U):
635aebb7
AL
1168 This variable conditionally defines the HAS_GETSERVBYNAME
1169 symbol, which indicates to the C program that the
781b178c
JH
1170 getservbyname() routine is available to look up services
1171 by their name.
1172
1173d_getsbyport (d_getsrvby.U):
635aebb7
AL
1174 This variable conditionally defines the HAS_GETSERVBYPORT
1175 symbol, which indicates to the C program that the
781b178c
JH
1176 getservbyport() routine is available to look up services
1177 by their port.
1178
1179d_getsent (d_getsent.U):
1180 This variable conditionally defines HAS_GETSERVENT if getservent() is
1181 available to look up network services in some data base or another.
1182
10bc17b6
JH
1183d_getservbyname_r (d_getservbyname_r.U):
1184 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1185 which indicates to the C program that the getservbyname_r()
1186 routine is available.
1187
1188d_getservbyport_r (d_getservbyport_r.U):
1189 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1190 which indicates to the C program that the getservbyport_r()
1191 routine is available.
1192
1193d_getservent_r (d_getservent_r.U):
1194 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1195 which indicates to the C program that the getservent_r()
1196 routine is available.
1197
781b178c
JH
1198d_getservprotos (d_getservprotos.U):
1199 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1200 which indicates to the C program that <netdb.h> supplies
635aebb7 1201 prototypes for the various getserv*() functions.
781b178c
JH
1202 See also netdbtype.U for probing for various netdb types.
1203
781b178c
JH
1204d_getspnam (d_getspnam.U):
1205 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1206 available to retrieve SysV shadow password entries by name.
1207
10bc17b6
JH
1208d_getspnam_r (d_getspnam_r.U):
1209 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1210 which indicates to the C program that the getspnam_r()
1211 routine is available.
1212
781b178c
JH
1213d_gettimeod (d_ftime.U):
1214 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1215 indicates that the gettimeofday() system call exists (to obtain a
1216 sub-second accuracy clock). You should probably include <sys/resource.h>.
1217
96938616
MB
1218d_gmtime64 (d_timefuncs64.U):
1219 This variable conditionally defines the HAS_GMTIME64 symbol, which
1220 indicates to the C program that the gmtime64 () routine is available.
1221
10bc17b6
JH
1222d_gmtime_r (d_gmtime_r.U):
1223 This variable conditionally defines the HAS_GMTIME_R symbol,
1224 which indicates to the C program that the gmtime_r()
1225 routine is available.
1226
781b178c
JH
1227d_gnulibc (d_gnulibc.U):
1228 Defined if we're dealing with the GNU C Library.
1229
1230d_grpasswd (i_grp.U):
1231 This variable conditionally defines GRPASSWD, which indicates
1232 that struct group in <grp.h> contains gr_passwd.
1233
1234d_hasmntopt (d_hasmntopt.U):
1235 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1236 indicates to the C program that the hasmntopt() routine is available
1237 to query the mount options of file systems.
1238
1239d_htonl (d_htonl.U):
1240 This variable conditionally defines HAS_HTONL if htonl() and its
1241 friends are available to do network order byte swapping.
1242
5c567d7d
JH
1243d_ilogbl (d_ilogbl.U):
1244 This variable conditionally defines the HAS_ILOGBL symbol, which
1245 indicates to the C program that the ilogbl() routine is available.
1246 If scalbnl is also present we can emulate frexpl.
1247
c95d0e17
GA
1248d_inc_version_list (inc_version_list.U):
1249 This variable conditionally defines PERL_INC_VERSION_LIST.
1250 It is set to undef when PERL_INC_VERSION_LIST is empty.
1251
781b178c
JH
1252d_index (d_strchr.U):
1253 This variable conditionally defines HAS_INDEX if index() and
1254 rindex() are available for string searching.
1255
1256d_inetaton (d_inetaton.U):
1257 This variable conditionally defines the HAS_INET_ATON symbol, which
1258 indicates to the C program that the inet_aton() function is available
1259 to parse IP address "dotted-quad" strings.
1260
5086dff9
MB
1261d_inetntop (d_inetntop.U):
1262 This variable conditionally defines the HAS_INETNTOP symbol,
1263 which indicates to the C program that the inet_ntop() function
1264 is available.
1265
1266d_inetpton (d_inetpton.U):
1267 This variable conditionally defines the HAS_INETPTON symbol,
1268 which indicates to the C program that the inet_pton() function
1269 is available.
1270
13b3f787 1271d_int64_t (d_int64_t.U):
781b178c
JH
1272 This symbol will be defined if the C compiler supports int64_t.
1273
781b178c
JH
1274d_isascii (d_isascii.U):
1275 This variable conditionally defines the HAS_ISASCII constant,
1276 which indicates to the C program that isascii() is available.
1277
758a5d79
JH
1278d_isfinite (d_isfinite.U):
1279 This variable conditionally defines the HAS_ISFINITE symbol, which
1280 indicates to the C program that the isfinite() routine is available.
1281
1282d_isinf (d_isinf.U):
1283 This variable conditionally defines the HAS_ISINF symbol, which
1284 indicates to the C program that the isinf() routine is available.
1285
a3540c92
JH
1286d_isnan (d_isnan.U):
1287 This variable conditionally defines the HAS_ISNAN symbol, which
1288 indicates to the C program that the isnan() routine is available.
1289
1290d_isnanl (d_isnanl.U):
1291 This variable conditionally defines the HAS_ISNANL symbol, which
1292 indicates to the C program that the isnanl() routine is available.
1293
781b178c
JH
1294d_killpg (d_killpg.U):
1295 This variable conditionally defines the HAS_KILLPG symbol, which
1296 indicates to the C program that the killpg() routine is available
1297 to kill process groups.
1298
1299d_lchown (d_lchown.U):
1300 This variable conditionally defines the HAS_LCHOWN symbol, which
1301 indicates to the C program that the lchown() routine is available
1302 to operate on a symbolic link (instead of following the link).
1303
ca24dfc6
LV
1304d_ldbl_dig (d_ldbl_dig.U):
1305 This variable conditionally defines d_ldbl_dig if this system's
1306 header files provide LDBL_DIG, which is the number of significant
1307 digits in a long double precision number.
1308
df4c34dc
MB
1309d_libm_lib_version (d_libm_lib_version.U):
1310 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1311 which indicates to the C program that math.h defines _LIB_VERSION
1312 being available in libm
1313
781b178c
JH
1314d_link (d_link.U):
1315 This variable conditionally defines HAS_LINK if link() is
1316 available to create hard links.
1317
96938616
MB
1318d_localtime64 (d_timefuncs64.U):
1319 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1320 indicates to the C program that the localtime64 () routine is available.
1321
10bc17b6
JH
1322d_localtime_r (d_localtime_r.U):
1323 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1324 which indicates to the C program that the localtime_r()
1325 routine is available.
1326
f025e94b
MB
1327d_localtime_r_needs_tzset (d_localtime_r.U):
1328 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1329 symbol, which makes us call tzset before localtime_r()
1330
781b178c
JH
1331d_locconv (d_locconv.U):
1332 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1333 available for numeric and monetary formatting conventions.
1334
781b178c
JH
1335d_lockf (d_lockf.U):
1336 This variable conditionally defines HAS_LOCKF if lockf() is
1337 available to do file locking.
1338
1339d_longdbl (d_longdbl.U):
635aebb7 1340 This variable conditionally defines HAS_LONG_DOUBLE if
781b178c
JH
1341 the long double type is supported.
1342
1343d_longlong (d_longlong.U):
635aebb7 1344 This variable conditionally defines HAS_LONG_LONG if
781b178c
JH
1345 the long long type is supported.
1346
c890dc6c
JH
1347d_lseekproto (d_lseekproto.U):
1348 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1349 which indicates to the C program that the system provides
1350 a prototype for the lseek() function. Otherwise, it is
1351 up to the program to supply one.
1352
781b178c
JH
1353d_lstat (d_lstat.U):
1354 This variable conditionally defines HAS_LSTAT if lstat() is
1355 available to do file stats on symbolic links.
1356
792d8dab
JH
1357d_madvise (d_madvise.U):
1358 This variable conditionally defines HAS_MADVISE if madvise() is
1359 available to map a file into memory.
1360
df4c34dc
MB
1361d_malloc_good_size (d_malloc_size.U):
1362 This symbol, if defined, indicates that the malloc_good_size
7dd121ae
MB
1363 routine is available for use.
1364
df4c34dc
MB
1365d_malloc_size (d_malloc_size.U):
1366 This symbol, if defined, indicates that the malloc_size
7dd121ae
MB
1367 routine is available for use.
1368
781b178c
JH
1369d_mblen (d_mblen.U):
1370 This variable conditionally defines the HAS_MBLEN symbol, which
1371 indicates to the C program that the mblen() routine is available
1372 to find the number of bytes in a multibye character.
1373
1374d_mbstowcs (d_mbstowcs.U):
1375 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1376 indicates to the C program that the mbstowcs() routine is available
1377 to convert a multibyte string into a wide character string.
1378
1379d_mbtowc (d_mbtowc.U):
1380 This variable conditionally defines the HAS_MBTOWC symbol, which
1381 indicates to the C program that the mbtowc() routine is available
1382 to convert multibyte to a wide character.
1383
1384d_memchr (d_memchr.U):
1385 This variable conditionally defines the HAS_MEMCHR symbol, which
1386 indicates to the C program that the memchr() routine is available
1387 to locate characters within a C string.
1388
1389d_memcmp (d_memcmp.U):
1390 This variable conditionally defines the HAS_MEMCMP symbol, which
1391 indicates to the C program that the memcmp() routine is available
1392 to compare blocks of memory.
1393
1394d_memcpy (d_memcpy.U):
1395 This variable conditionally defines the HAS_MEMCPY symbol, which
1396 indicates to the C program that the memcpy() routine is available
1397 to copy blocks of memory.
1398
1399d_memmove (d_memmove.U):
1400 This variable conditionally defines the HAS_MEMMOVE symbol, which
1401 indicates to the C program that the memmove() routine is available
1402 to copy potentatially overlapping blocks of memory.
1403
1404d_memset (d_memset.U):
1405 This variable conditionally defines the HAS_MEMSET symbol, which
1406 indicates to the C program that the memset() routine is available
1407 to set blocks of memory.
1408
1409d_mkdir (d_mkdir.U):
1410 This variable conditionally defines the HAS_MKDIR symbol, which
1411 indicates to the C program that the mkdir() routine is available
209e5c0a 1412 to create directories..
781b178c 1413
fe749a9f
JH
1414d_mkdtemp (d_mkdtemp.U):
1415 This variable conditionally defines the HAS_MKDTEMP symbol, which
1416 indicates to the C program that the mkdtemp() routine is available
1417 to exclusively create a uniquely named temporary directory.
1418
781b178c
JH
1419d_mkfifo (d_mkfifo.U):
1420 This variable conditionally defines the HAS_MKFIFO symbol, which
1421 indicates to the C program that the mkfifo() routine is available.
1422
fe749a9f
JH
1423d_mkstemp (d_mkstemp.U):
1424 This variable conditionally defines the HAS_MKSTEMP symbol, which
1425 indicates to the C program that the mkstemp() routine is available
1426 to exclusively create and open a uniquely named temporary file.
1427
1428d_mkstemps (d_mkstemps.U):
1429 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1430 indicates to the C program that the mkstemps() routine is available
1431 to exclusively create and open a uniquely named (with a suffix)
1432 temporary file.
1433
781b178c
JH
1434d_mktime (d_mktime.U):
1435 This variable conditionally defines the HAS_MKTIME symbol, which
1436 indicates to the C program that the mktime() routine is available.
1437
96938616
MB
1438d_mktime64 (d_timefuncs64.U):
1439 This variable conditionally defines the HAS_MKTIME64 symbol, which
1440 indicates to the C program that the mktime64 () routine is available.
1441
fe749a9f
JH
1442d_mmap (d_mmap.U):
1443 This variable conditionally defines HAS_MMAP if mmap() is
1444 available to map a file into memory.
1445
a3540c92
JH
1446d_modfl (d_modfl.U):
1447 This variable conditionally defines the HAS_MODFL symbol, which
1448 indicates to the C program that the modfl() routine is available.
1449
e67aeab1
JH
1450d_modfl_pow32_bug (d_modfl.U):
1451 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1452 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1453 For example from 4294967303.150000 one would get 4294967302.000000
1454 and 1.150000. The bug has been seen in certain versions of glibc,
1455 release 2.2.2 is known to be okay.
1456
44b94491
MB
1457d_modflproto (d_modfl.U):
1458 This symbol, if defined, indicates that the system provides
1459 a prototype for the modfl() function. Otherwise, it is up
1460 to the program to supply one. C99 says it should be
1461 long double modfl(long double, long double *);
1462
fe749a9f
JH
1463d_mprotect (d_mprotect.U):
1464 This variable conditionally defines HAS_MPROTECT if mprotect() is
1465 available to modify the access protection of a memory mapped file.
1466
781b178c
JH
1467d_msg (d_msg.U):
1468 This variable conditionally defines the HAS_MSG symbol, which
1469 indicates that the entire msg*(2) library is present.
1470
1471d_msg_ctrunc (d_socket.U):
1472 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1473 which indicates that the MSG_CTRUNC is available. #ifdef is
1474 not enough because it may be an enum, glibc has been known to do this.
1475
1476d_msg_dontroute (d_socket.U):
1477 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1478 which indicates that the MSG_DONTROUTE is available. #ifdef is
1479 not enough because it may be an enum, glibc has been known to do this.
1480
1481d_msg_oob (d_socket.U):
1482 This variable conditionally defines the HAS_MSG_OOB symbol,
1483 which indicates that the MSG_OOB is available. #ifdef is
1484 not enough because it may be an enum, glibc has been known to do this.
1485
1486d_msg_peek (d_socket.U):
1487 This variable conditionally defines the HAS_MSG_PEEK symbol,
1488 which indicates that the MSG_PEEK is available. #ifdef is
1489 not enough because it may be an enum, glibc has been known to do this.
1490
1491d_msg_proxy (d_socket.U):
1492 This variable conditionally defines the HAS_MSG_PROXY symbol,
1493 which indicates that the MSG_PROXY is available. #ifdef is
1494 not enough because it may be an enum, glibc has been known to do this.
1495
1496d_msgctl (d_msgctl.U):
1497 This variable conditionally defines the HAS_MSGCTL symbol, which
1498 indicates to the C program that the msgctl() routine is available.
1499
1500d_msgget (d_msgget.U):
1501 This variable conditionally defines the HAS_MSGGET symbol, which
1502 indicates to the C program that the msgget() routine is available.
1503
4e0554ec
JH
1504d_msghdr_s (d_msghdr_s.U):
1505 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1506 which indicates that the struct msghdr is supported.
1507
781b178c
JH
1508d_msgrcv (d_msgrcv.U):
1509 This variable conditionally defines the HAS_MSGRCV symbol, which
1510 indicates to the C program that the msgrcv() routine is available.
1511
1512d_msgsnd (d_msgsnd.U):
1513 This variable conditionally defines the HAS_MSGSND symbol, which
1514 indicates to the C program that the msgsnd() routine is available.
1515
fe749a9f
JH
1516d_msync (d_msync.U):
1517 This variable conditionally defines HAS_MSYNC if msync() is
1518 available to synchronize a mapped file.
1519
1520d_munmap (d_munmap.U):
1521 This variable conditionally defines HAS_MUNMAP if munmap() is
1522 available to unmap a region mapped by mmap().
1523
781b178c
JH
1524d_mymalloc (mallocsrc.U):
1525 This variable conditionally defines MYMALLOC in case other parts
1526 of the source want to take special action if MYMALLOC is used.
1527 This may include different sorts of profiling or error detection.
1528
a33f2d9f
AD
1529d_ndbm (i_ndbm.U):
1530 This variable conditionally defines the HAS_NDBM symbol, which
1531 indicates that both the ndbm.h include file and an appropriate ndbm
1532 library exist. Consult the different i_*ndbm variables
1533 to find out the actual include location. Sometimes, a system has the
1534 header file but not the library. This variable will only be set if
1535 the system has both.
1536
e74475c7
MHM
1537d_ndbm_h_uses_prototypes (i_ndbm.U):
1538 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1539 which indicates that the ndbm.h include file uses real ANSI C
1540 prototypes instead of K&R style function declarations. K&R style
1541 declarations are unsupported in C++, so the include file requires
1542 special handling when using a C++ compiler and this variable is
1543 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1544 to get the same information for alternative ndbm.h include files.
1545
781b178c
JH
1546d_nice (d_nice.U):
1547 This variable conditionally defines the HAS_NICE symbol, which
1548 indicates to the C program that the nice() routine is available.
1549
2765b840
JH
1550d_nl_langinfo (d_nl_langinfo.U):
1551 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1552 indicates to the C program that the nl_langinfo() routine is available.
1553
78691af5 1554d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1555 This variable indicates whether a variable of type nvtype
1556 can preserve all the bits a variable of type uvtype.
1557
f607920a
CB
1558d_nv_zero_is_allbits_zero (perlxv.U):
1559 This variable indicates whether a variable of type nvtype
1560 stores 0.0 in memory as all bits zero.
1561
c890dc6c 1562d_off64_t (d_off64_t.U):
781b178c
JH
1563 This symbol will be defined if the C compiler supports off64_t.
1564
781b178c
JH
1565d_old_pthread_create_joinable (d_pthrattrj.U):
1566 This variable conditionally defines pthread_create_joinable.
1567 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1568
1569d_oldpthreads (usethreads.U):
1570 This variable conditionally defines the OLD_PTHREADS_API symbol,
1571 and indicates that Perl should be built to use the old
8c09e4ca 1572 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1573 usethreads is set.
1574
1575d_oldsock (d_socket.U):
1576 This variable conditionally defines the OLDSOCKET symbol, which
1577 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1578
1579d_open3 (d_open3.U):
1580 This variable conditionally defines the HAS_OPEN3 manifest constant,
1581 which indicates to the C program that the 3 argument version of
1582 the open(2) function is available.
1583
781b178c
JH
1584d_pathconf (d_pathconf.U):
1585 This variable conditionally defines the HAS_PATHCONF symbol, which
1586 indicates to the C program that the pathconf() routine is available
1587 to determine file-system related limits and options associated
1588 with a given filename.
1589
1590d_pause (d_pause.U):
1591 This variable conditionally defines the HAS_PAUSE symbol, which
1592 indicates to the C program that the pause() routine is available
1593 to suspend a process until a signal is received.
1594
3b777bb4
GS
1595d_perl_otherlibdirs (otherlibdirs.U):
1596 This variable conditionally defines PERL_OTHERLIBDIRS, which
1597 contains a colon-separated set of paths for the perl binary to
1598 include in @INC. See also otherlibdirs.
1599
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1600d_phostname (d_gethname.U):
1601 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1602 contains the shell command which, when fed to popen(), may be
1603 used to derive the host name.
1604
1605d_pipe (d_pipe.U):
1606 This variable conditionally defines the HAS_PIPE symbol, which
1607 indicates to the C program that the pipe() routine is available
1608 to create an inter-process channel.
1609
1610d_poll (d_poll.U):
1611 This variable conditionally defines the HAS_POLL symbol, which
1612 indicates to the C program that the poll() routine is available
1613 to poll active file descriptors.
1614
1615d_portable (d_portable.U):
1616 This variable conditionally defines the PORTABLE symbol, which
1617 indicates to the C program that it should not assume that it is
1618 running on the machine it was compiled on.
1619
c796e3db
MB
1620d_prctl (d_prctl.U):
1621 This variable conditionally defines the HAS_PRCTL symbol, which
1622 indicates to the C program that the prctl() routine is available.
1623
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MB
1624d_prctl_set_name (d_prctl.U):
1625 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
2245bcb6
CB
1626 which indicates to the C program that the prctl() routine supports
1627 the PR_SET_NAME option.
c796e3db 1628
4d54317a
JH
1629d_PRId64 (quadfio.U):
1630 This variable conditionally defines the PERL_PRId64 symbol, which
1631 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1632
1633d_PRIeldbl (longdblfio.U):
1634 This variable conditionally defines the PERL_PRIfldbl symbol, which
1635 indiciates that stdio has a symbol to print long doubles.
1636
1637d_PRIEUldbl (longdblfio.U):
1638 This variable conditionally defines the PERL_PRIfldbl symbol, which
1639 indiciates that stdio has a symbol to print long doubles.
1640 The 'U' in the name is to separate this from d_PRIeldbl so that even
1641 case-blind systems can see the difference.
1642
1643d_PRIfldbl (longdblfio.U):
1644 This variable conditionally defines the PERL_PRIfldbl symbol, which
1645 indiciates that stdio has a symbol to print long doubles.
1646
1647d_PRIFUldbl (longdblfio.U):
1648 This variable conditionally defines the PERL_PRIfldbl symbol, which
1649 indiciates that stdio has a symbol to print long doubles.
1650 The 'U' in the name is to separate this from d_PRIfldbl so that even
1651 case-blind systems can see the difference.
1652
1653d_PRIgldbl (longdblfio.U):
1654 This variable conditionally defines the PERL_PRIfldbl symbol, which
1655 indiciates that stdio has a symbol to print long doubles.
1656
1657d_PRIGUldbl (longdblfio.U):
1658 This variable conditionally defines the PERL_PRIfldbl symbol, which
1659 indiciates that stdio has a symbol to print long doubles.
1660 The 'U' in the name is to separate this from d_PRIgldbl so that even
1661 case-blind systems can see the difference.
1662
1663d_PRIi64 (quadfio.U):
1664 This variable conditionally defines the PERL_PRIi64 symbol, which
1665 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1666
066e7355 1667d_printf_format_null (d_attribut.U):
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MB
1668 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1669 indicates the C compiler allows printf-like formats to be null.
1670
4d54317a
JH
1671d_PRIo64 (quadfio.U):
1672 This variable conditionally defines the PERL_PRIo64 symbol, which
1673 indiciates that stdio has a symbol to print 64-bit octal numbers.
1674
1675d_PRIu64 (quadfio.U):
1676 This variable conditionally defines the PERL_PRIu64 symbol, which
1677 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1678 numbers.
1679
1680d_PRIx64 (quadfio.U):
1681 This variable conditionally defines the PERL_PRIx64 symbol, which
1682 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1683
1684d_PRIXU64 (quadfio.U):
1685 This variable conditionally defines the PERL_PRIXU64 symbol, which
1686 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1687 The 'U' in the name is to separate this from d_PRIx64 so that even
1688 case-blind systems can see the difference.
1689
428dc699
JH
1690d_procselfexe (d_procselfexe.U):
1691 Defined if $procselfexe is symlink to the absolute
1692 pathname of the executing program.
1693
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MB
1694d_pseudofork (d_vfork.U):
1695 This variable conditionally defines the HAS_PSEUDOFORK symbol,
1696 which indicates that an emulation of the fork routine is available.
1697
d6483fcc
JH
1698d_pthread_atfork (d_pthread_atfork.U):
1699 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1700 which indicates to the C program that the pthread_atfork()
1701 routine is available.
1702
505656d3
JH
1703d_pthread_attr_setscope (d_pthread_attr_ss.U):
1704 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
1705 pthread_attr_setscope() is available to set the contention scope
1706 attribute of a thread attribute object.
1707
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1708d_pthread_yield (d_pthread_y.U):
1709 This variable conditionally defines the HAS_PTHREAD_YIELD
1710 symbol if the pthread_yield routine is available to yield
1711 the execution of the current thread.
1712
1713d_pwage (i_pwd.U):
1714 This variable conditionally defines PWAGE, which indicates
1715 that struct passwd contains pw_age.
1716
1717d_pwchange (i_pwd.U):
1718 This variable conditionally defines PWCHANGE, which indicates
1719 that struct passwd contains pw_change.
1720
1721d_pwclass (i_pwd.U):
1722 This variable conditionally defines PWCLASS, which indicates
1723 that struct passwd contains pw_class.
1724
1725d_pwcomment (i_pwd.U):
1726 This variable conditionally defines PWCOMMENT, which indicates
1727 that struct passwd contains pw_comment.
1728
1729d_pwexpire (i_pwd.U):
1730 This variable conditionally defines PWEXPIRE, which indicates
1731 that struct passwd contains pw_expire.
1732
1733d_pwgecos (i_pwd.U):
1734 This variable conditionally defines PWGECOS, which indicates
1735 that struct passwd contains pw_gecos.
1736
1737d_pwpasswd (i_pwd.U):
1738 This variable conditionally defines PWPASSWD, which indicates
1739 that struct passwd contains pw_passwd.
1740
1741d_pwquota (i_pwd.U):
1742 This variable conditionally defines PWQUOTA, which indicates
1743 that struct passwd contains pw_quota.
1744
792d8dab
JH
1745d_qgcvt (d_qgcvt.U):
1746 This variable conditionally defines the HAS_QGCVT symbol, which
1747 indicates to the C program that the qgcvt() routine is available.
1748
de1c2614
JH
1749d_quad (quadtype.U):
1750 This variable, if defined, tells that there's a 64-bit integer type,
1751 quadtype.
1752
10bc17b6
JH
1753d_random_r (d_random_r.U):
1754 This variable conditionally defines the HAS_RANDOM_R symbol,
1755 which indicates to the C program that the random_r()
1756 routine is available.
1757
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MB
1758d_readdir (d_readdir.U):
1759 This variable conditionally defines HAS_READDIR if readdir() is
1760 available to read directory entries.
1761
10bc17b6
JH
1762d_readdir64_r (d_readdir64_r.U):
1763 This variable conditionally defines the HAS_READDIR64_R symbol,
1764 which indicates to the C program that the readdir64_r()
1765 routine is available.
1766
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JH
1767d_readdir_r (d_readdir_r.U):
1768 This variable conditionally defines the HAS_READDIR_R symbol,
1769 which indicates to the C program that the readdir_r()
1770 routine is available.
1771
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JH
1772d_readlink (d_readlink.U):
1773 This variable conditionally defines the HAS_READLINK symbol, which
1774 indicates to the C program that the readlink() routine is available
1775 to read the value of a symbolic link.
1776
4e0554ec
JH
1777d_readv (d_readv.U):
1778 This variable conditionally defines the HAS_READV symbol, which
1779 indicates to the C program that the readv() routine is available.
1780
1781d_recvmsg (d_recvmsg.U):
1782 This variable conditionally defines the HAS_RECVMSG symbol, which
1783 indicates to the C program that the recvmsg() routine is available.
1784
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1785d_rename (d_rename.U):
1786 This variable conditionally defines the HAS_RENAME symbol, which
1787 indicates to the C program that the rename() routine is available
1788 to rename files.
1789
1790d_rewinddir (d_readdir.U):
1791 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1792 available.
1793
1794d_rmdir (d_rmdir.U):
1795 This variable conditionally defines HAS_RMDIR if rmdir() is
1796 available to remove directories.
1797
1798d_safebcpy (d_safebcpy.U):
1799 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1800 the bcopy() routine can do overlapping copies. Normally, you
1801 should probably use memmove().
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1802
1803d_safemcpy (d_safemcpy.U):
1804 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1805 the memcpy() routine can do overlapping copies.
b6cc3bc4 1806 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1807
1808d_sanemcmp (d_sanemcmp.U):
1809 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1810 the memcpy() routine is available and can be used to compare relative
1811 magnitudes of chars with their high bits set.
1812
ef9f17be
JH
1813d_sbrkproto (d_sbrkproto.U):
1814 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1815 which indicates to the C program that the system provides
1816 a prototype for the sbrk() function. Otherwise, it is
1817 up to the program to supply one.
1818
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JH
1819d_scalbnl (d_scalbnl.U):
1820 This variable conditionally defines the HAS_SCALBNL symbol, which
1821 indicates to the C program that the scalbnl() routine is available.
1822 If ilogbl is also present we can emulate frexpl.
1823
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JH
1824d_sched_yield (d_pthread_y.U):
1825 This variable conditionally defines the HAS_SCHED_YIELD
1826 symbol if the sched_yield routine is available to yield
1827 the execution of the current thread.
1828
1829d_scm_rights (d_socket.U):
1830 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1831 which indicates that the SCM_RIGHTS is available. #ifdef is
1832 not enough because it may be an enum, glibc has been known to do this.
1833
4d54317a
JH
1834d_SCNfldbl (longdblfio.U):
1835 This variable conditionally defines the PERL_PRIfldbl symbol, which
1836 indiciates that stdio has a symbol to scan long doubles.
1837
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JH
1838d_seekdir (d_readdir.U):
1839 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1840 available.
1841
1842d_select (d_select.U):
1843 This variable conditionally defines HAS_SELECT if select() is
1844 available to select active file descriptors. A <sys/time.h>
1845 inclusion may be necessary for the timeout field.
1846
1847d_sem (d_sem.U):
1848 This variable conditionally defines the HAS_SEM symbol, which
1849 indicates that the entire sem*(2) library is present.
1850
1851d_semctl (d_semctl.U):
1852 This variable conditionally defines the HAS_SEMCTL symbol, which
1853 indicates to the C program that the semctl() routine is available.
1854
1855d_semctl_semid_ds (d_union_semun.U):
1856 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1857 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1858
1859d_semctl_semun (d_union_semun.U):
1860 This variable conditionally defines USE_SEMCTL_SEMUN, which
1861 indicates that union semun is to be used for semctl IPC_STAT.
1862
1863d_semget (d_semget.U):
1864 This variable conditionally defines the HAS_SEMGET symbol, which
1865 indicates to the C program that the semget() routine is available.
1866
1867d_semop (d_semop.U):
1868 This variable conditionally defines the HAS_SEMOP symbol, which
1869 indicates to the C program that the semop() routine is available.
1870
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JH
1871d_sendmsg (d_sendmsg.U):
1872 This variable conditionally defines the HAS_SENDMSG symbol, which
1873 indicates to the C program that the sendmsg() routine is available.
1874
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1875d_setegid (d_setegid.U):
1876 This variable conditionally defines the HAS_SETEGID symbol, which
1877 indicates to the C program that the setegid() routine is available
1878 to change the effective gid of the current program.
1879
1880d_seteuid (d_seteuid.U):
1881 This variable conditionally defines the HAS_SETEUID symbol, which
1882 indicates to the C program that the seteuid() routine is available
1883 to change the effective uid of the current program.
1884
1885d_setgrent (d_setgrent.U):
1886 This variable conditionally defines the HAS_SETGRENT symbol, which
1887 indicates to the C program that the setgrent() routine is available
1888 for initializing sequential access to the group database.
1889
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JH
1890d_setgrent_r (d_setgrent_r.U):
1891 This variable conditionally defines the HAS_SETGRENT_R symbol,
1892 which indicates to the C program that the setgrent_r()
1893 routine is available.
1894
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JH
1895d_setgrps (d_setgrps.U):
1896 This variable conditionally defines the HAS_SETGROUPS symbol, which
1897 indicates to the C program that the setgroups() routine is available
1898 to set the list of process groups.
1899
1900d_sethent (d_sethent.U):
1901 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1902 available.
1903
10bc17b6
JH
1904d_sethostent_r (d_sethostent_r.U):
1905 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1906 which indicates to the C program that the sethostent_r()
1907 routine is available.
1908
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JH
1909d_setitimer (d_setitimer.U):
1910 This variable conditionally defines the HAS_SETITIMER symbol, which
1911 indicates to the C program that the setitimer() routine is available.
1912
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JH
1913d_setlinebuf (d_setlnbuf.U):
1914 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1915 indicates to the C program that the setlinebuf() routine is available
1916 to change stderr or stdout from block-buffered or unbuffered to a
1917 line-buffered mode.
1918
1919d_setlocale (d_setlocale.U):
1920 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1921 available to handle locale-specific ctype implementations.
1922
10bc17b6
JH
1923d_setlocale_r (d_setlocale_r.U):
1924 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1925 which indicates to the C program that the setlocale_r()
1926 routine is available.
1927
781b178c
JH
1928d_setnent (d_setnent.U):
1929 This variable conditionally defines HAS_SETNETENT if setnetent() is
1930 available.
1931
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JH
1932d_setnetent_r (d_setnetent_r.U):
1933 This variable conditionally defines the HAS_SETNETENT_R symbol,
1934 which indicates to the C program that the setnetent_r()
1935 routine is available.
1936
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JH
1937d_setpent (d_setpent.U):
1938 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1939 available.
1940
1941d_setpgid (d_setpgid.U):
1942 This variable conditionally defines the HAS_SETPGID symbol if the
1943 setpgid(pid, gpid) function is available to set process group ID.
1944
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1945d_setpgrp (d_setpgrp.U):
1946 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1947 available to set the current process group.
1948
781b178c
JH
1949d_setpgrp2 (d_setpgrp2.U):
1950 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1951 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1952 is available to set the current process group.
1953
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JH
1954d_setprior (d_setprior.U):
1955 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1956 is available to set a process's priority.
1957
af960fef
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1958d_setproctitle (d_setproctitle.U):
1959 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1960 which indicates to the C program that the setproctitle() routine
1961 is available.
1962
10bc17b6
JH
1963d_setprotoent_r (d_setprotoent_r.U):
1964 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1965 which indicates to the C program that the setprotoent_r()
1966 routine is available.
1967
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1968d_setpwent (d_setpwent.U):
1969 This variable conditionally defines the HAS_SETPWENT symbol, which
1970 indicates to the C program that the setpwent() routine is available
1971 for initializing sequential access to the passwd database.
1972
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JH
1973d_setpwent_r (d_setpwent_r.U):
1974 This variable conditionally defines the HAS_SETPWENT_R symbol,
1975 which indicates to the C program that the setpwent_r()
1976 routine is available.
1977
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1978d_setregid (d_setregid.U):
1979 This variable conditionally defines HAS_SETREGID if setregid() is
1980 available to change the real and effective gid of the current
1981 process.
1982
1983d_setresgid (d_setregid.U):
1984 This variable conditionally defines HAS_SETRESGID if setresgid() is
1985 available to change the real, effective and saved gid of the current
1986 process.
1987
1988d_setresuid (d_setreuid.U):
1989 This variable conditionally defines HAS_SETREUID if setresuid() is
1990 available to change the real, effective and saved uid of the current
1991 process.
1992
1993d_setreuid (d_setreuid.U):
1994 This variable conditionally defines HAS_SETREUID if setreuid() is
1995 available to change the real and effective uid of the current
1996 process.
1997
1998d_setrgid (d_setrgid.U):
1999 This variable conditionally defines the HAS_SETRGID symbol, which
2000 indicates to the C program that the setrgid() routine is available
2001 to change the real gid of the current program.
2002
2003d_setruid (d_setruid.U):
2004 This variable conditionally defines the HAS_SETRUID symbol, which
2005 indicates to the C program that the setruid() routine is available
2006 to change the real uid of the current program.
2007
2008d_setsent (d_setsent.U):
2009 This variable conditionally defines HAS_SETSERVENT if setservent() is
2010 available.
2011
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2012d_setservent_r (d_setservent_r.U):
2013 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2014 which indicates to the C program that the setservent_r()
2015 routine is available.
2016
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JH
2017d_setsid (d_setsid.U):
2018 This variable conditionally defines HAS_SETSID if setsid() is
2019 available to set the process group ID.
2020
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2021d_setvbuf (d_setvbuf.U):
2022 This variable conditionally defines the HAS_SETVBUF symbol, which
2023 indicates to the C program that the setvbuf() routine is available
2024 to change buffering on an open stdio stream.
2025
2026d_sfio (d_sfio.U):
2027 This variable conditionally defines the USE_SFIO symbol,
2028 and indicates whether sfio is available (and should be used).
2029
2030d_shm (d_shm.U):
2031 This variable conditionally defines the HAS_SHM symbol, which
2032 indicates that the entire shm*(2) library is present.
2033
2034d_shmat (d_shmat.U):
2035 This variable conditionally defines the HAS_SHMAT symbol, which
2036 indicates to the C program that the shmat() routine is available.
2037
2038d_shmatprototype (d_shmat.U):
635aebb7 2039 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
781b178c
JH
2040 symbol, which indicates that sys/shm.h has a prototype for
2041 shmat.
2042
2043d_shmctl (d_shmctl.U):
2044 This variable conditionally defines the HAS_SHMCTL symbol, which
2045 indicates to the C program that the shmctl() routine is available.
2046
2047d_shmdt (d_shmdt.U):
2048 This variable conditionally defines the HAS_SHMDT symbol, which
2049 indicates to the C program that the shmdt() routine is available.
2050
2051d_shmget (d_shmget.U):
2052 This variable conditionally defines the HAS_SHMGET symbol, which
2053 indicates to the C program that the shmget() routine is available.
2054
2055d_sigaction (d_sigaction.U):
2056 This variable conditionally defines the HAS_SIGACTION symbol, which
2057 indicates that the Vr4 sigaction() routine is available.
2058
ed140128
AD
2059d_signbit (d_signbit.U):
2060 This variable conditionally defines the HAS_SIGNBIT symbol, which
2061 indicates to the C program that the signbit() routine is available
2062 and safe to use with perl's intern NV type.
2063
983dbef6
JH
2064d_sigprocmask (d_sigprocmask.U):
2065 This variable conditionally defines HAS_SIGPROCMASK
2066 if sigprocmask() is available to examine or change the signal mask
2067 of the calling process.
2068
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2069d_sigsetjmp (d_sigsetjmp.U):
2070 This variable conditionally defines the HAS_SIGSETJMP symbol,
2071 which indicates that the sigsetjmp() routine is available to
2072 call setjmp() and optionally save the process's signal mask.
2073
f53580fe
MB
2074d_sin6_scope_id (d_socket.U):
2075 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2076 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2077 member.
2078
c95d0e17
GA
2079d_sitearch (sitearch.U):
2080 This variable conditionally defines SITEARCH to hold the pathname
2081 of architecture-dependent library files for $package. If
2082 $sitearch is the same as $archlib, then this is set to undef.
2083
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2084d_snprintf (d_snprintf.U):
2085 This variable conditionally defines the HAS_SNPRINTF symbol, which
2086 indicates to the C program that the snprintf () library function
2087 is available.
2088
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MB
2089d_sockaddr_sa_len (d_socket.U):
2090 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2091 which indicates that a struct sockaddr structure has the sa_len
2092 member.
2093
49a78c82
JH
2094d_sockatmark (d_sockatmark.U):
2095 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2096 indicates to the C program that the sockatmark() routine is available.
2097
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JH
2098d_sockatmarkproto (d_sockatmarkproto.U):
2099 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2100 which indicates to the C program that the system provides
2101 a prototype for the sockatmark() function. Otherwise, it is
2102 up to the program to supply one.
2103
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2104d_socket (d_socket.U):
2105 This variable conditionally defines HAS_SOCKET, which indicates
2106 that the BSD socket interface is supported.
2107
13b3f787
JH
2108d_socklen_t (d_socklen_t.U):
2109 This symbol will be defined if the C compiler supports socklen_t.
2110
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2111d_sockpair (d_socket.U):
2112 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2113 indicates that the BSD socketpair() is supported.
2114
6b356c8e
JH
2115d_socks5_init (d_socks5_init.U):
2116 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2117 indicates to the C program that the socks5_init() routine is available.
2118
df4c34dc 2119d_sprintf_returns_strlen (d_sprintf_len.U):
78821a22
NC
2120 This variable defines whether sprintf returns the length of the string
2121 (as per the ANSI spec). Some C libraries retain compatibility with
2122 pre-ANSI C and return a pointer to the passed in buffer; for these
2123 this variable will be undef.
2124
68d4903c
JH
2125d_sqrtl (d_sqrtl.U):
2126 This variable conditionally defines the HAS_SQRTL symbol, which
2127 indicates to the C program that the sqrtl() routine is available.
2128
10bc17b6
JH
2129d_srand48_r (d_srand48_r.U):
2130 This variable conditionally defines the HAS_SRAND48_R symbol,
2131 which indicates to the C program that the srand48_r()
2132 routine is available.
2133
2134d_srandom_r (d_srandom_r.U):
2135 This variable conditionally defines the HAS_SRANDOM_R symbol,
2136 which indicates to the C program that the srandom_r()
2137 routine is available.
2138
eef837ea
JH
2139d_sresgproto (d_sresgproto.U):
2140 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2141 which indicates to the C program that the system provides
2142 a prototype for the setresgid() function. Otherwise, it is
2143 up to the program to supply one.
2144
640374d0
JH
2145d_sresuproto (d_sresuproto.U):
2146 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2147 which indicates to the C program that the system provides
2148 a prototype for the setresuid() function. Otherwise, it is
2149 up to the program to supply one.
2150
781b178c
JH
2151d_statblks (d_statblks.U):
2152 This variable conditionally defines USE_STAT_BLOCKS
2153 if this system has a stat structure declaring
2154 st_blksize and st_blocks.
2155
ad27e871 2156d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 2157 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
2158 symbol, which indicates to struct statfs from has f_flags member.
2159 This kind of struct statfs is coming from sys/mount.h (BSD),
2160 not from sys/statfs.h (SYSV).
2161
ad27e871 2162d_statfs_s (d_statfs_s.U):
0545a864
JH
2163 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2164 which indicates that the struct statfs is supported.
2165
9e08e8f0
MB
2166d_static_inline (d_static_inline.U):
2167 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2168 which indicates that the C compiler supports C99-style static
2169 inline. That is, the function can't be called from another
2170 translation unit.
2171
781b178c
JH
2172d_statvfs (d_statvfs.U):
2173 This variable conditionally defines the HAS_STATVFS symbol, which
2174 indicates to the C program that the statvfs() routine is available.
2175
2176d_stdio_cnt_lval (d_stdstdio.U):
2177 This variable conditionally defines STDIO_CNT_LVALUE if the
2178 FILE_cnt macro can be used as an lvalue.
2179
2180d_stdio_ptr_lval (d_stdstdio.U):
2181 This variable conditionally defines STDIO_PTR_LVALUE if the
2182 FILE_ptr macro can be used as an lvalue.
2183
a7ffa9b9
NC
2184d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2185 This symbol is defined if using the FILE_ptr macro as an lvalue
2186 to increase the pointer by n leaves File_cnt(fp) unchanged.
2187
2188d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2189 This symbol is defined if using the FILE_ptr macro as an lvalue
2190 to increase the pointer by n has the side effect of decreasing the
2191 value of File_cnt(fp) by n.
2192
781b178c
JH
2193d_stdio_stream_array (stdio_streams.U):
2194 This variable tells whether there is an array holding
2195 the stdio streams.
2196
2197d_stdiobase (d_stdstdio.U):
2198 This variable conditionally defines USE_STDIO_BASE if this system
2199 has a FILE structure declaring a usable _base field (or equivalent)
2200 in stdio.h.
2201
2202d_stdstdio (d_stdstdio.U):
2203 This variable conditionally defines USE_STDIO_PTR if this system
2204 has a FILE structure declaring usable _ptr and _cnt fields (or
2205 equivalent) in stdio.h.
2206
781b178c
JH
2207d_strchr (d_strchr.U):
2208 This variable conditionally defines HAS_STRCHR if strchr() and
2209 strrchr() are available for string searching.
2210
2211d_strcoll (d_strcoll.U):
2212 This variable conditionally defines HAS_STRCOLL if strcoll() is
2213 available to compare strings using collating information.
2214
2215d_strctcpy (d_strctcpy.U):
2216 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2217 indicates to the C program that this C compiler knows how to copy
2218 structures.
2219
2220d_strerrm (d_strerror.U):
2221 This variable holds what Strerrr is defined as to translate an error
2222 code condition into an error message string. It could be 'strerror'
2223 or a more complex macro emulating strrror with sys_errlist[], or the
2224 "unknown" string when both strerror and sys_errlist are missing.
2225
2226d_strerror (d_strerror.U):
2227 This variable conditionally defines HAS_STRERROR if strerror() is
2228 available to translate error numbers to strings.
2229
10bc17b6
JH
2230d_strerror_r (d_strerror_r.U):
2231 This variable conditionally defines the HAS_STRERROR_R symbol,
2232 which indicates to the C program that the strerror_r()
2233 routine is available.
2234
b3c85772
JH
2235d_strftime (d_strftime.U):
2236 This variable conditionally defines the HAS_STRFTIME symbol, which
2237 indicates to the C program that the strftime() routine is available.
2238
fd550ca5
MB
2239d_strlcat (d_strlcat.U):
2240 This variable conditionally defines the HAS_STRLCAT symbol, which
2241 indicates to the C program that the strlcat () routine is available.
2242
2243d_strlcpy (d_strlcpy.U):
2244 This variable conditionally defines the HAS_STRLCPY symbol, which
2245 indicates to the C program that the strlcpy () routine is available.
2246
781b178c
JH
2247d_strtod (d_strtod.U):
2248 This variable conditionally defines the HAS_STRTOD symbol, which
2249 indicates to the C program that the strtod() routine is available
2250 to provide better numeric string conversion than atof().
2251
2252d_strtol (d_strtol.U):
2253 This variable conditionally defines the HAS_STRTOL symbol, which
2254 indicates to the C program that the strtol() routine is available
2255 to provide better numeric string conversion than atoi() and friends.
2256
ff935051
JH
2257d_strtold (d_strtold.U):
2258 This variable conditionally defines the HAS_STRTOLD symbol, which
2259 indicates to the C program that the strtold() routine is available.
2260
76d49b1c
JH
2261d_strtoll (d_strtoll.U):
2262 This variable conditionally defines the HAS_STRTOLL symbol, which
2263 indicates to the C program that the strtoll() routine is available.
2264
d0e6d399
NC
2265d_strtoq (d_strtoq.U):
2266 This variable conditionally defines the HAS_STRTOQ symbol, which
2267 indicates to the C program that the strtoq() routine is available.
2268
781b178c
JH
2269d_strtoul (d_strtoul.U):
2270 This variable conditionally defines the HAS_STRTOUL symbol, which
2271 indicates to the C program that the strtoul() routine is available
2272 to provide conversion of strings to unsigned long.
2273
ff935051 2274d_strtoull (d_strtoull.U):
11dc3f68
JH
2275 This variable conditionally defines the HAS_STRTOULL symbol, which
2276 indicates to the C program that the strtoull() routine is available.
2277
ff935051
JH
2278d_strtouq (d_strtouq.U):
2279 This variable conditionally defines the HAS_STRTOUQ symbol, which
2280 indicates to the C program that the strtouq() routine is available.
2281
781b178c
JH
2282d_strxfrm (d_strxfrm.U):
2283 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2284 available to transform strings.
2285
2286d_suidsafe (d_dosuid.U):
2287 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2288 if setuid scripts can be secure. This test looks in /dev/fd/.
2289
2290d_symlink (d_symlink.U):
2291 This variable conditionally defines the HAS_SYMLINK symbol, which
2292 indicates to the C program that the symlink() routine is available
2293 to create symbolic links.
2294
2295d_syscall (d_syscall.U):
2296 This variable conditionally defines HAS_SYSCALL if syscall() is
2297 available call arbitrary system calls.
2298
5af95cda
JH
2299d_syscallproto (d_syscallproto.U):
2300 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2301 which indicates to the C program that the system provides
2302 a prototype for the syscall() function. Otherwise, it is
2303 up to the program to supply one.
2304
781b178c
JH
2305d_sysconf (d_sysconf.U):
2306 This variable conditionally defines the HAS_SYSCONF symbol, which
2307 indicates to the C program that the sysconf() routine is available
2308 to determine system related limits and options.
2309
2310d_sysernlst (d_strerror.U):
2311 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2312 is available to translate error numbers to the symbolic name.
2313
2314d_syserrlst (d_strerror.U):
2315 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2316 available to translate error numbers to strings.
2317
2318d_system (d_system.U):
2319 This variable conditionally defines HAS_SYSTEM if system() is
2320 available to issue a shell command.
2321
2322d_tcgetpgrp (d_tcgtpgrp.U):
2323 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2324 indicates to the C program that the tcgetpgrp() routine is available.
2325 to get foreground process group ID.
2326
2327d_tcsetpgrp (d_tcstpgrp.U):
2328 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2329 indicates to the C program that the tcsetpgrp() routine is available
2330 to set foreground process group ID.
2331
781b178c
JH
2332d_telldir (d_readdir.U):
2333 This variable conditionally defines HAS_TELLDIR if telldir() is
2334 available.
2335
2336d_telldirproto (d_telldirproto.U):
2337 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2338 which indicates to the C program that the system provides
2339 a prototype for the telldir() function. Otherwise, it is
2340 up to the program to supply one.
2341
2342d_time (d_time.U):
2343 This variable conditionally defines the HAS_TIME symbol, which indicates
2344 that the time() routine exists. The time() routine is normaly
2345 provided on UNIX systems.
2346
cbb9e8a7
MB
2347d_timegm (d_timegm.U):
2348 This variable conditionally defines the HAS_TIMEGM symbol, which
2349 indicates to the C program that the timegm () routine is available.
2350
781b178c
JH
2351d_times (d_times.U):
2352 This variable conditionally defines the HAS_TIMES symbol, which indicates
2353 that the times() routine exists. The times() routine is normaly
2354 provided on UNIX systems. You may have to include <sys/times.h>.
2355
511116db
JH
2356d_tm_tm_gmtoff (i_time.U):
2357 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2358 indicates to the C program that the struct tm has the tm_gmtoff field.
2359
2360d_tm_tm_zone (i_time.U):
2361 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2362 indicates to the C program that the struct tm has the tm_zone field.
2363
10bc17b6
JH
2364d_tmpnam_r (d_tmpnam_r.U):
2365 This variable conditionally defines the HAS_TMPNAM_R symbol,
2366 which indicates to the C program that the tmpnam_r()
2367 routine is available.
2368
781b178c
JH
2369d_truncate (d_truncate.U):
2370 This variable conditionally defines HAS_TRUNCATE if truncate() is
2371 available to truncate files.
2372
10bc17b6
JH
2373d_ttyname_r (d_ttyname_r.U):
2374 This variable conditionally defines the HAS_TTYNAME_R symbol,
2375 which indicates to the C program that the ttyname_r()
2376 routine is available.
2377
781b178c
JH
2378d_tzname (d_tzname.U):
2379 This variable conditionally defines HAS_TZNAME if tzname[] is
2380 available to access timezone names.
2381
4e0554ec
JH
2382d_u32align (d_u32align.U):
2383 This variable tells whether you must access character data
2384 through U32-aligned pointers.
2385
2386d_ualarm (d_ualarm.U):
2387 This variable conditionally defines the HAS_UALARM symbol, which
2388 indicates to the C program that the ualarm() routine is available.
2389
781b178c
JH
2390d_umask (d_umask.U):
2391 This variable conditionally defines the HAS_UMASK symbol, which
2392 indicates to the C program that the umask() routine is available.
2393 to set and get the value of the file creation mask.
2394
2395d_uname (d_gethname.U):
2396 This variable conditionally defines the HAS_UNAME symbol, which
2397 indicates to the C program that the uname() routine may be
2398 used to derive the host name.
2399
2400d_union_semun (d_union_semun.U):
2401 This variable conditionally defines HAS_UNION_SEMUN if the
2402 union semun is defined by including <sys/sem.h>.
2403
758a5d79
JH
2404d_unordered (d_unordered.U):
2405 This variable conditionally defines the HAS_UNORDERED symbol, which
2406 indicates to the C program that the unordered() routine is available.
2407
bdf33aa7
SP
2408d_unsetenv (d_unsetenv.U):
2409 This variable conditionally defines the HAS_UNSETENV symbol, which
2410 indicates to the C program that the unsetenv () routine is available.
2411
4e0554ec
JH
2412d_usleep (d_usleep.U):
2413 This variable conditionally defines HAS_USLEEP if usleep() is
2414 available to do high granularity sleeps.
2415
5af95cda
JH
2416d_usleepproto (d_usleepproto.U):
2417 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2418 which indicates to the C program that the system provides
2419 a prototype for the usleep() function. Otherwise, it is
2420 up to the program to supply one.
2421
0545a864
JH
2422d_ustat (d_ustat.U):
2423 This variable conditionally defines HAS_USTAT if ustat() is
2424 available to query file system statistics by dev_t.
2425
526fdc24
MS
2426d_vendorarch (vendorarch.U):
2427 This variable conditionally defined PERL_VENDORARCH.
2428
0617aed7
JH
2429d_vendorbin (vendorbin.U):
2430 This variable conditionally defines PERL_VENDORBIN.
2431
a3635516
JH
2432d_vendorlib (vendorlib.U):
2433 This variable conditionally defines PERL_VENDORLIB.
2434
10305dfa
JH
2435d_vendorscript (vendorscript.U):
2436 This variable conditionally defines PERL_VENDORSCRIPT.
2437
781b178c
JH
2438d_vfork (d_vfork.U):
2439 This variable conditionally defines the HAS_VFORK symbol, which
2440 indicates the vfork() routine is available.
2441
2442d_void_closedir (d_closedir.U):
2443 This variable conditionally defines VOID_CLOSEDIR if closedir()
2444 does not return a value.
2445
2446d_voidsig (d_voidsig.U):
2447 This variable conditionally defines VOIDSIG if this system
2448 declares "void (*signal(...))()" in signal.h. The old way was to
2449 declare it as "int (*signal(...))()".
2450
2451d_voidtty (i_sysioctl.U):
2452 This variable conditionally defines USE_IOCNOTTY to indicate that the
2453 ioctl() call with TIOCNOTTY should be used to void tty association.
2454 Otherwise (on USG probably), it is enough to close the standard file
2455 decriptors and do a setpgrp().
2456
2457d_volatile (d_volatile.U):
2458 This variable conditionally defines the HASVOLATILE symbol, which
2459 indicates to the C program that this C compiler knows about the
2460 volatile declaration.
2461
2462d_vprintf (d_vprintf.U):
2463 This variable conditionally defines the HAS_VPRINTF symbol, which
2464 indicates to the C program that the vprintf() routine is available
2465 to printf with a pointer to an argument list.
2466
df4c34dc
MB
2467d_vsnprintf (d_snprintf.U):
2468 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2469 indicates to the C program that the vsnprintf () library function
2470 is available.
2471
781b178c
JH
2472d_wait4 (d_wait4.U):
2473 This variable conditionally defines the HAS_WAIT4 symbol, which
2474 indicates the wait4() routine is available.
2475
2476d_waitpid (d_waitpid.U):
2477 This variable conditionally defines HAS_WAITPID if waitpid() is
2478 available to wait for child process.
2479
2480d_wcstombs (d_wcstombs.U):
2481 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2482 indicates to the C program that the wcstombs() routine is available
2483 to convert wide character strings to multibyte strings.
2484
2485d_wctomb (d_wctomb.U):
2486 This variable conditionally defines the HAS_WCTOMB symbol, which
2487 indicates to the C program that the wctomb() routine is available
2488 to convert a wide character to a multibyte.
2489
4e0554ec
JH
2490d_writev (d_writev.U):
2491 This variable conditionally defines the HAS_WRITEV symbol, which
2492 indicates to the C program that the writev() routine is available.
2493
781b178c
JH
2494d_xenix (Guess.U):
2495 This variable conditionally defines the symbol XENIX, which alerts
2496 the C program that it runs under Xenix.
2497
2498date (Loc.U):
5bf26616 2499 This variable is used internally by Configure to determine the
781b178c
JH
2500 full pathname (if any) of the date program. After Configure runs,
2501 the value is reset to a plain "date" and is not useful.
2502
2503db_hashtype (i_db.U):
2504 This variable contains the type of the hash structure element
2505 in the <db.h> header file. In older versions of DB, it was
2506 int, while in newer ones it is u_int32_t.
2507
2508db_prefixtype (i_db.U):
2509 This variable contains the type of the prefix structure element
2510 in the <db.h> header file. In older versions of DB, it was
2511 int, while in newer ones it is size_t.
2512
640374d0
JH
2513db_version_major (i_db.U):
2514 This variable contains the major version number of
2515 Berkeley DB found in the <db.h> header file.
2516
2517db_version_minor (i_db.U):
2518 This variable contains the minor version number of
2519 Berkeley DB found in the <db.h> header file.
2520 For DB version 1 this is always 0.
2521
2522db_version_patch (i_db.U):
2523 This variable contains the patch version number of
2524 Berkeley DB found in the <db.h> header file.
2525 For DB version 1 this is always 0.
2526
781b178c
JH
2527defvoidused (voidflags.U):
2528 This variable contains the default value of the VOIDUSED symbol (15).
2529
2530direntrytype (i_dirent.U):
2531 This symbol is set to 'struct direct' or 'struct dirent' depending on
2532 whether dirent is available or not. You should use this pseudo type to
2533 portably declare your directory entries.
2534
2535dlext (dlext.U):
2536 This variable contains the extension that is to be used for the
2537 dynamically loaded modules that perl generaties.
2538
2539dlsrc (dlsrc.U):
2540 This variable contains the name of the dynamic loading file that
2541 will be used with the package.
2542
2543doublesize (doublesize.U):
2544 This variable contains the value of the DOUBLESIZE symbol, which
2545 indicates to the C program how many bytes there are in a double.
2546
2547drand01 (randfunc.U):
2548 Indicates the macro to be used to generate normalized
2549 random numbers. Uses randfunc, often divided by
2550 (double) (((unsigned long) 1 << randbits)) in order to
2551 normalize the result.
2552 In C programs, the macro 'Drand01' is mapped to drand01.
2553
10bc17b6
JH
2554drand48_r_proto (d_drand48_r.U):
2555 This variable encodes the prototype of drand48_r.
39183afa
JH
2556 It is zero if d_drand48_r is undef, and one of the
2557 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2558 is defined.
10bc17b6 2559
34f1896b
MB
2560dtrace (usedtrace.U):
2561 This variable holds the location of the dtrace executable.
2562
781b178c
JH
2563dynamic_ext (Extensions.U):
2564 This variable holds a list of XS extension files we want to
2565 link dynamically into the package. It is used by Makefile.
2566
2567eagain (nblock_io.U):
2568 This variable bears the symbolic errno code set by read() when no
2569 data is present on the file and non-blocking I/O was enabled (otherwise,
2570 read() blocks naturally).
2571
2572ebcdic (ebcdic.U):
2573 This variable conditionally defines EBCDIC if this
2574 system uses EBCDIC encoding. Among other things, this
2575 means that the character ranges are not contiguous.
2576 See trnl.U
2577
2578echo (Loc.U):
5bf26616 2579 This variable is used internally by Configure to determine the
781b178c
JH
2580 full pathname (if any) of the echo program. After Configure runs,
2581 the value is reset to a plain "echo" and is not useful.
2582
2583egrep (Loc.U):
5bf26616 2584 This variable is used internally by Configure to determine the
781b178c
JH
2585 full pathname (if any) of the egrep program. After Configure runs,
2586 the value is reset to a plain "egrep" and is not useful.
2587
2588emacs (Loc.U):
2589 This variable is defined but not used by Configure.
fcdf39cf 2590 The value is the empty string and is not useful.
781b178c 2591
10bc17b6
JH
2592endgrent_r_proto (d_endgrent_r.U):
2593 This variable encodes the prototype of endgrent_r.
39183afa
JH
2594 It is zero if d_endgrent_r is undef, and one of the
2595 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2596 is defined.
10bc17b6
JH
2597
2598endhostent_r_proto (d_endhostent_r.U):
2599 This variable encodes the prototype of endhostent_r.
39183afa
JH
2600 It is zero if d_endhostent_r is undef, and one of the
2601 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2602 is defined.
10bc17b6
JH
2603
2604endnetent_r_proto (d_endnetent_r.U):
2605 This variable encodes the prototype of endnetent_r.
39183afa
JH
2606 It is zero if d_endnetent_r is undef, and one of the
2607 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2608 is defined.
10bc17b6
JH
2609
2610endprotoent_r_proto (d_endprotoent_r.U):
2611 This variable encodes the prototype of endprotoent_r.
39183afa
JH
2612 It is zero if d_endprotoent_r is undef, and one of the
2613 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2614 is defined.
10bc17b6
JH
2615
2616endpwent_r_proto (d_endpwent_r.U):
2617 This variable encodes the prototype of endpwent_r.
39183afa
JH
2618 It is zero if d_endpwent_r is undef, and one of the
2619 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2620 is defined.
10bc17b6
JH
2621
2622endservent_r_proto (d_endservent_r.U):
2623 This variable encodes the prototype of endservent_r.
39183afa
JH
2624 It is zero if d_endservent_r is undef, and one of the
2625 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2626 is defined.
10bc17b6 2627
781b178c
JH
2628eunicefix (Init.U):
2629 When running under Eunice this variable contains a command which will
2630 convert a shell script to the proper form of text file for it to be
2631 executable by the shell. On other systems it is a no-op.
2632
2633exe_ext (Unix.U):
2634 This is an old synonym for _exe.
2635
2636expr (Loc.U):
5bf26616 2637 This variable is used internally by Configure to determine the
781b178c
JH
2638 full pathname (if any) of the expr program. After Configure runs,
2639 the value is reset to a plain "expr" and is not useful.
2640
2641extensions (Extensions.U):
2642 This variable holds a list of all extension files (both XS and
2643 non-xs linked into the package. It is propagated to Config.pm
635aebb7 2644 and is typically used to test whether a particular extesion
781b178c
JH
2645 is available.
2646
61c26d18
MHM
2647extern_C (Csym.U):
2648 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
2649 variable can be used in Configure to do the right thing.
2650
cb7ddd31
JH
2651extras (Extras.U):
2652 This variable holds a list of extra modules to install.
2653
781b178c
JH
2654fflushall (fflushall.U):
2655 This symbol, if defined, tells that to flush
2656 all pending stdio output one must loop through all
2657 the stdio file handles stored in an array and fflush them.
2658 Note that if fflushNULL is defined, fflushall will not
2659 even be probed for and will be left undefined.
2660
4d54317a
JH
2661fflushNULL (fflushall.U):
2662 This symbol, if defined, tells that fflush(NULL) does flush
2663 all pending stdio output.
2664
781b178c 2665find (Loc.U):
ff935051 2666 This variable is defined but not used by Configure.
fcdf39cf 2667 The value is the empty string and is not useful.
781b178c
JH
2668
2669firstmakefile (Unix.U):
2670 This variable defines the first file searched by make. On unix,
2671 it is makefile (then Makefile). On case-insensitive systems,
2672 it might be something else. This is only used to deal with
2673 convoluted make depend tricks.
2674
2675flex (Loc.U):
2676 This variable is defined but not used by Configure.
fcdf39cf 2677 The value is the empty string and is not useful.
781b178c 2678
a22e52b9
JH
2679fpossize (fpossize.U):
2680 This variable contains the size of a fpostype in bytes.
2681
781b178c 2682fpostype (fpostype.U):
635aebb7 2683 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2684 uint, or whatever type is used to declare file positions in libc.
2685
2686freetype (mallocsrc.U):
2687 This variable contains the return type of free(). It is usually
2688 void, but occasionally int.
2689
5440bc8e
JH
2690from (Cross.U):
2691 This variable contains the command used by Configure
2692 to copy files from the target host. Useful and available
2693 only during Perl build.
2694 The string ':' if not cross-compiling.
2695
781b178c
JH
2696full_ar (Loc_ar.U):
2697 This variable contains the full pathname to 'ar', whether or
2698 not the user has specified 'portability'. This is only used
2699 in the Makefile.SH.
2700
2701full_csh (d_csh.U):
2702 This variable contains the full pathname to 'csh', whether or
2703 not the user has specified 'portability'. This is only used
2704 in the compiled C program, and we assume that all systems which
2705 can share this executable will have the same full pathname to
2706 'csh.'
2707
2708full_sed (Loc_sed.U):
2709 This variable contains the full pathname to 'sed', whether or
2710 not the user has specified 'portability'. This is only used
2711 in the compiled C program, and we assume that all systems which
2712 can share this executable will have the same full pathname to
2713 'sed.'
2714
123f32c0
MB
2715gccansipedantic (gccvers.U):
2716 If GNU cc (gcc) is used, this variable will enable (if set) the
2717 -ansi and -pedantic ccflags for building core files (through
2718 cflags script). (See Porting/pumpkin.pod for full description).
2719
af960fef 2720gccosandvers (gccvers.U):
123f32c0
MB
2721 If GNU cc (gcc) is used, this variable holds the operating system
2722 and version used to compile gcc. It is set to '' if not gcc,
af960fef
JH
2723 or if nothing useful can be parsed as the os version.
2724
2725gccversion (gccvers.U):
123f32c0 2726 If GNU cc (gcc) is used, this variable holds '1' or '2' to
781b178c
JH
2727 indicate whether the compiler is version 1 or 2. This is used in
2728 setting some of the default cflags. It is set to '' if not gcc.
2729
10bc17b6
JH
2730getgrent_r_proto (d_getgrent_r.U):
2731 This variable encodes the prototype of getgrent_r.
39183afa
JH
2732 It is zero if d_getgrent_r is undef, and one of the
2733 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2734 is defined.
10bc17b6
JH
2735
2736getgrgid_r_proto (d_getgrgid_r.U):
2737 This variable encodes the prototype of getgrgid_r.
39183afa
JH
2738 It is zero if d_getgrgid_r is undef, and one of the
2739 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2740 is defined.
10bc17b6
JH
2741
2742getgrnam_r_proto (d_getgrnam_r.U):
2743 This variable encodes the prototype of getgrnam_r.
39183afa
JH
2744 It is zero if d_getgrnam_r is undef, and one of the
2745 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2746 is defined.
10bc17b6
JH
2747
2748gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2749 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
2750 It is zero if d_gethostbyaddr_r is undef, and one of the
2751 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2752 is defined.
10bc17b6
JH
2753
2754gethostbyname_r_proto (d_gethostbyname_r.U):
2755 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
2756 It is zero if d_gethostbyname_r is undef, and one of the
2757 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2758 is defined.
10bc17b6
JH
2759
2760gethostent_r_proto (d_gethostent_r.U):
2761 This variable encodes the prototype of gethostent_r.
39183afa
JH
2762 It is zero if d_gethostent_r is undef, and one of the
2763 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2764 is defined.
10bc17b6
JH
2765
2766getlogin_r_proto (d_getlogin_r.U):
2767 This variable encodes the prototype of getlogin_r.
39183afa
JH
2768 It is zero if d_getlogin_r is undef, and one of the
2769 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2770 is defined.
10bc17b6
JH
2771
2772getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2773 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
2774 It is zero if d_getnetbyaddr_r is undef, and one of the
2775 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2776 is defined.
10bc17b6
JH
2777
2778getnetbyname_r_proto (d_getnetbyname_r.U):
2779 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
2780 It is zero if d_getnetbyname_r is undef, and one of the
2781 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2782 is defined.
10bc17b6
JH
2783
2784getnetent_r_proto (d_getnetent_r.U):
2785 This variable encodes the prototype of getnetent_r.
39183afa
JH
2786 It is zero if d_getnetent_r is undef, and one of the
2787 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2788 is defined.
10bc17b6
JH
2789
2790getprotobyname_r_proto (d_getprotobyname_r.U):
2791 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
2792 It is zero if d_getprotobyname_r is undef, and one of the
2793 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2794 is defined.
10bc17b6
JH
2795
2796getprotobynumber_r_proto (d_getprotobynumber_r.U):
2797 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
2798 It is zero if d_getprotobynumber_r is undef, and one of the
2799 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2800 is defined.
10bc17b6
JH
2801
2802getprotoent_r_proto (d_getprotoent_r.U):
2803 This variable encodes the prototype of getprotoent_r.
39183afa
JH
2804 It is zero if d_getprotoent_r is undef, and one of the
2805 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2806 is defined.
10bc17b6
JH
2807
2808getpwent_r_proto (d_getpwent_r.U):
2809 This variable encodes the prototype of getpwent_r.
39183afa
JH
2810 It is zero if d_getpwent_r is undef, and one of the
2811 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2812 is defined.
10bc17b6
JH
2813
2814getpwnam_r_proto (d_getpwnam_r.U):
2815 This variable encodes the prototype of getpwnam_r.
39183afa
JH
2816 It is zero if d_getpwnam_r is undef, and one of the
2817 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2818 is defined.
10bc17b6
JH
2819
2820getpwuid_r_proto (d_getpwuid_r.U):
2821 This variable encodes the prototype of getpwuid_r.
39183afa
JH
2822 It is zero if d_getpwuid_r is undef, and one of the
2823 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2824 is defined.
10bc17b6
JH
2825
2826getservbyname_r_proto (d_getservbyname_r.U):
2827 This variable encodes the prototype of getservbyname_r.
39183afa
JH
2828 It is zero if d_getservbyname_r is undef, and one of the
2829 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2830 is defined.
10bc17b6
JH
2831
2832getservbyport_r_proto (d_getservbyport_r.U):
2833 This variable encodes the prototype of getservbyport_r.
39183afa
JH
2834 It is zero if d_getservbyport_r is undef, and one of the
2835 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2836 is defined.
10bc17b6
JH
2837
2838getservent_r_proto (d_getservent_r.U):
2839 This variable encodes the prototype of getservent_r.
39183afa
JH
2840 It is zero if d_getservent_r is undef, and one of the
2841 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2842 is defined.
10bc17b6
JH
2843
2844getspnam_r_proto (d_getspnam_r.U):
2845 This variable encodes the prototype of getspnam_r.
39183afa
JH
2846 It is zero if d_getspnam_r is undef, and one of the
2847 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2848 is defined.
10bc17b6 2849
a22e52b9
JH
2850gidformat (gidf.U):
2851 This variable contains the format string used for printing a Gid_t.
2852
785fb66b
JH
2853gidsign (gidsign.U):
2854 This variable contains the signedness of a gidtype.
2855 1 for unsigned, -1 for signed.
2856
2857gidsize (gidsize.U):
2858 This variable contains the size of a gidtype in bytes.
2859
781b178c
JH
2860gidtype (gidtype.U):
2861 This variable defines Gid_t to be something like gid_t, int,
2862 ushort, or whatever type is used to declare the return type
2863 of getgid(). Typically, it is the type of group ids in the kernel.
2864
2865glibpth (libpth.U):
2866 This variable holds the general path (space-separated) used to
2867 find libraries. It may contain directories that do not exist on
2868 this platform, libpth is the cleaned-up version.
2869
c68a00c0
JH
2870gmake (Loc.U):
2871 This variable is used internally by Configure to determine the
2872 full pathname (if any) of the gmake program. After Configure runs,
2873 the value is reset to a plain "gmake" and is not useful.
2874
10bc17b6
JH
2875gmtime_r_proto (d_gmtime_r.U):
2876 This variable encodes the prototype of gmtime_r.
39183afa
JH
2877 It is zero if d_gmtime_r is undef, and one of the
2878 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2879 is defined.
10bc17b6 2880
00fac743
JH
2881gnulibc_version (d_gnulibc.U):
2882 This variable contains the version number of the GNU C library.
2883 It is usually something like '2.2.5'. It is a plain '' if this
2884 is not the GNU C library, or if the version is unknown.
2885
781b178c 2886grep (Loc.U):
5bf26616 2887 This variable is used internally by Configure to determine the
781b178c
JH
2888 full pathname (if any) of the grep program. After Configure runs,
2889 the value is reset to a plain "grep" and is not useful.
2890
2891groupcat (nis.U):
2892 This variable contains a command that produces the text of the
2893 /etc/group file. This is normally "cat /etc/group", but can be
2894 "ypcat group" when NIS is used.
aaacdc8b
GS
2895 On some systems, such as os390, there may be no equivalent
2896 command, in which case this variable is unset.
781b178c
JH
2897
2898groupstype (groupstype.U):
635aebb7 2899 This variable defines Groups_t to be something like gid_t, int,
781b178c
JH
2900 ushort, or whatever type is used for the second argument to
2901 getgroups() and setgroups(). Usually, this is the same as
2902 gidtype (gid_t), but sometimes it isn't.
2903
2904gzip (Loc.U):
5bf26616 2905 This variable is used internally by Configure to determine the
781b178c
JH
2906 full pathname (if any) of the gzip program. After Configure runs,
2907 the value is reset to a plain "gzip" and is not useful.
2908
2909h_fcntl (h_fcntl.U):
2910 This is variable gets set in various places to tell i_fcntl that
2911 <fcntl.h> should be included.
2912
2913h_sysfile (h_sysfile.U):
2914 This is variable gets set in various places to tell i_sys_file that
2915 <sys/file.h> should be included.
2916
2917hint (Oldconfig.U):
2918 Gives the type of hints used for previous answers. May be one of
2919 "default", "recommended" or "previous".
2920
2921hostcat (nis.U):
2922 This variable contains a command that produces the text of the
2923 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2924 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2925 On some systems, such as os390, there may be no equivalent
2926 command, in which case this variable is unset.
781b178c 2927
10305dfa
JH
2928html1dir (html1dir.U):
2929 This variable contains the name of the directory in which html
2930 source pages are to be put. This directory is for pages
2931 that describe whole programs, not libraries or modules. It
2932 is intended to correspond roughly to section 1 of the Unix
2933 manuals.
2934
2935html1direxp (html1dir.U):
2936 This variable is the same as the html1dir variable, but is filename
2937 expanded at configuration time, for convenient use in makefiles.
2938
2939html3dir (html3dir.U):
2940 This variable contains the name of the directory in which html
2941 source pages are to be put. This directory is for pages
2942 that describe libraries or modules. It is intended to
2943 correspond roughly to section 3 of the Unix manuals.
2944
2945html3direxp (html3dir.U):
2946 This variable is the same as the html3dir variable, but is filename
2947 expanded at configuration time, for convenient use in makefiles.
2948
a22e52b9
JH
2949i16size (perlxv.U):
2950 This variable is the size of an I16 in bytes.
2951
2952i16type (perlxv.U):
2953 This variable contains the C type used for Perl's I16.
2954
2955i32size (perlxv.U):
2956 This variable is the size of an I32 in bytes.
2957
2958i32type (perlxv.U):
2959 This variable contains the C type used for Perl's I32.
2960
2961i64size (perlxv.U):
2962 This variable is the size of an I64 in bytes.
2963
2964i64type (perlxv.U):
2965 This variable contains the C type used for Perl's I64.
2966
2967i8size (perlxv.U):
2968 This variable is the size of an I8 in bytes.
2969
2970i8type (perlxv.U):
2971 This variable contains the C type used for Perl's I8.
2972
781b178c
JH
2973i_arpainet (i_arpainet.U):
2974 This variable conditionally defines the I_ARPA_INET symbol,
2975 and indicates whether a C program should include <arpa/inet.h>.
2976
2a0de2c5
NC
2977i_assert (i_assert.U):
2978 This variable conditionally defines the I_ASSERT symbol, which
c0bacbef
MB
2979 indicates to the C program that <assert.h> exists and could be
2980 included.
2a0de2c5 2981
781b178c
JH
2982i_bsdioctl (i_sysioctl.U):
2983 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2984 indicates to the C program that <sys/bsdioctl.h> exists and should
2985 be included.
2986
10bc17b6
JH
2987i_crypt (i_crypt.U):
2988 This variable conditionally defines the I_CRYPT symbol, and indicates
2989 whether a C program should include <crypt.h>.
2990
781b178c
JH
2991i_db (i_db.U):
2992 This variable conditionally defines the I_DB symbol, and indicates
2993 whether a C program may include Berkeley's DB include file <db.h>.
2994
2995i_dbm (i_dbm.U):
2996 This variable conditionally defines the I_DBM symbol, which
2997 indicates to the C program that <dbm.h> exists and should
2998 be included.
2999
3000i_dirent (i_dirent.U):
3001 This variable conditionally defines I_DIRENT, which indicates
3002 to the C program that it should include <dirent.h>.
3003
3004i_dld (i_dld.U):
3005 This variable conditionally defines the I_DLD symbol, which
3006 indicates to the C program that <dld.h> (GNU dynamic loading)
3007 exists and should be included.
3008
3009i_dlfcn (i_dlfcn.U):
3010 This variable conditionally defines the I_DLFCN symbol, which
3011 indicates to the C program that <dlfcn.h> exists and should
3012 be included.
3013
3014i_fcntl (i_fcntl.U):
3015 This variable controls the value of I_FCNTL (which tells
3016 the C program to include <fcntl.h>).
3017
3018i_float (i_float.U):
3019 This variable conditionally defines the I_FLOAT symbol, and indicates
3020 whether a C program may include <float.h> to get symbols like DBL_MAX
3021 or DBL_MIN, i.e. machine dependent floating point values.
3022
758a5d79
JH
3023i_fp (i_fp.U):
3024 This variable conditionally defines the I_FP symbol, and indicates
3025 whether a C program should include <fp.h>.
3026
3027i_fp_class (i_fp_class.U):
3028 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3029 whether a C program should include <fp_class.h>.
3030
781b178c
JH
3031i_gdbm (i_gdbm.U):
3032 This variable conditionally defines the I_GDBM symbol, which
3033 indicates to the C program that <gdbm.h> exists and should
3034 be included.
3035
a33f2d9f
AD
3036i_gdbm_ndbm (i_ndbm.U):
3037 This variable conditionally defines the I_GDBM_NDBM symbol, which
3038 indicates to the C program that <gdbm-ndbm.h> exists and should
3039 be included. This is the location of the ndbm.h compatibility file
3040 in Debian 4.0.
3041
3042i_gdbmndbm (i_ndbm.U):
3043 This variable conditionally defines the I_GDBMNDBM symbol, which
3044 indicates to the C program that <gdbm/ndbm.h> exists and should
3045 be included. This was the location of the ndbm.h compatibility file
3046 in RedHat 7.1.
3047
781b178c
JH
3048i_grp (i_grp.U):
3049 This variable conditionally defines the I_GRP symbol, and indicates
3050 whether a C program should include <grp.h>.
3051
792d8dab
JH
3052i_ieeefp (i_ieeefp.U):
3053 This variable conditionally defines the I_IEEEFP symbol, and indicates
3054 whether a C program should include <ieeefp.h>.
3055
781b178c
JH
3056i_inttypes (i_inttypes.U):
3057 This variable conditionally defines the I_INTTYPES symbol,
3058 and indicates whether a C program should include <inttypes.h>.
3059
2765b840
JH
3060i_langinfo (i_langinfo.U):
3061 This variable conditionally defines the I_LANGINFO symbol,
3062 and indicates whether a C program should include <langinfo.h>.
3063
af960fef
JH
3064i_libutil (i_libutil.U):
3065 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3066 whether a C program should include <libutil.h>.
3067
781b178c
JH
3068i_limits (i_limits.U):
3069 This variable conditionally defines the I_LIMITS symbol, and indicates
3070 whether a C program may include <limits.h> to get symbols like WORD_BIT
3071 and friends.
3072
3073i_locale (i_locale.U):
3074 This variable conditionally defines the I_LOCALE symbol,
3075 and indicates whether a C program should include <locale.h>.
3076
3077i_machcthr (i_machcthr.U):
3078 This variable conditionally defines the I_MACH_CTHREADS symbol,
3079 and indicates whether a C program should include <mach/cthreads.h>.
3080
3081i_malloc (i_malloc.U):
3082 This variable conditionally defines the I_MALLOC symbol, and indicates
3083 whether a C program should include <malloc.h>.
3084
1cd66f7c
DD
3085i_mallocmalloc (i_mallocmalloc.U):
3086 This variable conditionally defines the I_MALLOCMALLOC symbol,
3087 and indicates whether a C program should include <malloc/malloc.h>.
3088
781b178c
JH
3089i_math (i_math.U):
3090 This variable conditionally defines the I_MATH symbol, and indicates
3091 whether a C program may include <math.h>.
3092
3093i_memory (i_memory.U):
3094 This variable conditionally defines the I_MEMORY symbol, and indicates
3095 whether a C program should include <memory.h>.
3096
3097i_mntent (i_mntent.U):
3098 This variable conditionally defines the I_MNTENT symbol, and indicates
3099 whether a C program should include <mntent.h>.
3100
3101i_ndbm (i_ndbm.U):
3102 This variable conditionally defines the I_NDBM symbol, which
3103 indicates to the C program that <ndbm.h> exists and should
3104 be included.
3105
3106i_netdb (i_netdb.U):
3107 This variable conditionally defines the I_NETDB symbol, and indicates
3108 whether a C program should include <netdb.h>.
3109
3110i_neterrno (i_neterrno.U):
3111 This variable conditionally defines the I_NET_ERRNO symbol, which
3112 indicates to the C program that <net/errno.h> exists and should
3113 be included.
3114
3115i_netinettcp (i_netinettcp.U):
3116 This variable conditionally defines the I_NETINET_TCP symbol,
3117 and indicates whether a C program should include <netinet/tcp.h>.
3118
3119i_niin (i_niin.U):
3120 This variable conditionally defines I_NETINET_IN, which indicates
3121 to the C program that it should include <netinet/in.h>. Otherwise,
3122 you may try <sys/in.h>.
3123
3124i_poll (i_poll.U):
3125 This variable conditionally defines the I_POLL symbol, and indicates
3126 whether a C program should include <poll.h>.
3127
3813c136
JH
3128i_prot (i_prot.U):
3129 This variable conditionally defines the I_PROT symbol, and indicates
3130 whether a C program should include <prot.h>.
3131
781b178c 3132i_pthread (i_pthread.U):
190b66db 3133 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
3134 and indicates whether a C program should include <pthread.h>.
3135
3136i_pwd (i_pwd.U):
3137 This variable conditionally defines I_PWD, which indicates
3138 to the C program that it should include <pwd.h>.
3139
3140i_rpcsvcdbm (i_dbm.U):
3141 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3142 indicates to the C program that <rpcsvc/dbm.h> exists and should
3143 be included. Some System V systems might need this instead of <dbm.h>.
3144
3145i_sfio (i_sfio.U):
3146 This variable conditionally defines the I_SFIO symbol,
3147 and indicates whether a C program should include <sfio.h>.
3148
3149i_sgtty (i_termio.U):
3150 This variable conditionally defines the I_SGTTY symbol, which
3151 indicates to the C program that it should include <sgtty.h> rather
3152 than <termio.h>.
3153
3154i_shadow (i_shadow.U):
3155 This variable conditionally defines the I_SHADOW symbol, and indicates
3156 whether a C program should include <shadow.h>.
3157
3158i_socks (i_socks.U):
3159 This variable conditionally defines the I_SOCKS symbol, and indicates
3160 whether a C program should include <socks.h>.
3161
3162i_stdarg (i_varhdr.U):
3163 This variable conditionally defines the I_STDARG symbol, which
3164 indicates to the C program that <stdarg.h> exists and should
3165 be included.
3166
3167i_stddef (i_stddef.U):
3168 This variable conditionally defines the I_STDDEF symbol, which
3169 indicates to the C program that <stddef.h> exists and should
3170 be included.
3171
3172i_stdlib (i_stdlib.U):
3173 This variable conditionally defines the I_STDLIB symbol, which
3174 indicates to the C program that <stdlib.h> exists and should
3175 be included.
3176
3177i_string (i_string.U):
3178 This variable conditionally defines the I_STRING symbol, which
3179 indicates that <string.h> should be included rather than <strings.h>.
3180
792d8dab
JH
3181i_sunmath (i_sunmath.U):
3182 This variable conditionally defines the I_SUNMATH symbol, and indicates
3183 whether a C program should include <sunmath.h>.
3184
781b178c
JH
3185i_sysaccess (i_sysaccess.U):
3186 This variable conditionally defines the I_SYS_ACCESS symbol,
3187 and indicates whether a C program should include <sys/access.h>.
3188
3189i_sysdir (i_sysdir.U):
3190 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3191 whether a C program should include <sys/dir.h>.
3192
3193i_sysfile (i_sysfile.U):
3194 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3195 whether a C program should include <sys/file.h> to get R_OK and friends.
3196
3197i_sysfilio (i_sysioctl.U):
3198 This variable conditionally defines the I_SYS_FILIO symbol, which
3199 indicates to the C program that <sys/filio.h> exists and should
3200 be included in preference to <sys/ioctl.h>.
3201
3202i_sysin (i_niin.U):
3203 This variable conditionally defines I_SYS_IN, which indicates
3204 to the C program that it should include <sys/in.h> instead of
3205 <netinet/in.h>.
3206
3207i_sysioctl (i_sysioctl.U):
3208 This variable conditionally defines the I_SYS_IOCTL symbol, which
3209 indicates to the C program that <sys/ioctl.h> exists and should
3210 be included.
3211
ca52efda
JH
3212i_syslog (i_syslog.U):
3213 This variable conditionally defines the I_SYSLOG symbol,
3214 and indicates whether a C program should include <syslog.h>.
3215
fe749a9f
JH
3216i_sysmman (i_sysmman.U):
3217 This variable conditionally defines the I_SYS_MMAN symbol, and
3218 indicates whether a C program should include <sys/mman.h>.
3219
87b71857
JH
3220i_sysmode (i_sysmode.U):
3221 This variable conditionally defines the I_SYSMODE symbol,
3222 and indicates whether a C program should include <sys/mode.h>.
3223
781b178c
JH
3224i_sysmount (i_sysmount.U):
3225 This variable conditionally defines the I_SYSMOUNT symbol,
3226 and indicates whether a C program should include <sys/mount.h>.
3227
3228i_sysndir (i_sysndir.U):
3229 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3230 whether a C program should include <sys/ndir.h>.
3231
3232i_sysparam (i_sysparam.U):
3233 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3234 whether a C program should include <sys/param.h>.
3235
216dac04
MB
3236i_syspoll (i_syspoll.U):
3237 This variable conditionally defines the I_SYS_POLL symbol, which
3238 indicates to the C program that it should include <sys/poll.h>.
3239
781b178c
JH
3240i_sysresrc (i_sysresrc.U):
3241 This variable conditionally defines the I_SYS_RESOURCE symbol,
3242 and indicates whether a C program should include <sys/resource.h>.
3243
3244i_syssecrt (i_syssecrt.U):
3245 This variable conditionally defines the I_SYS_SECURITY symbol,
3246 and indicates whether a C program should include <sys/security.h>.
3247
3248i_sysselct (i_sysselct.U):
3249 This variable conditionally defines I_SYS_SELECT, which indicates
3250 to the C program that it should include <sys/select.h> in order to
3251 get the definition of struct timeval.
3252
3253i_syssockio (i_sysioctl.U):
3254 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3255 C program that socket ioctl codes may be found in <sys/sockio.h>
3256 instead of <sys/ioctl.h>.
3257
3258i_sysstat (i_sysstat.U):
3259 This variable conditionally defines the I_SYS_STAT symbol,
3260 and indicates whether a C program should include <sys/stat.h>.
3261
0545a864
JH
3262i_sysstatfs (i_sysstatfs.U):
3263 This variable conditionally defines the I_SYSSTATFS symbol,
3264 and indicates whether a C program should include <sys/statfs.h>.
3265
781b178c
JH
3266i_sysstatvfs (i_sysstatvfs.U):
3267 This variable conditionally defines the I_SYSSTATVFS symbol,
3268 and indicates whether a C program should include <sys/statvfs.h>.
3269
3270i_systime (i_time.U):
3271 This variable conditionally defines I_SYS_TIME, which indicates
3272 to the C program that it should include <sys/time.h>.
3273
3274i_systimek (i_time.U):
3275 This variable conditionally defines I_SYS_TIME_KERNEL, which
3276 indicates to the C program that it should include <sys/time.h>
3277 with KERNEL defined.
3278
3279i_systimes (i_systimes.U):
3280 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3281 whether a C program should include <sys/times.h>.
3282
3283i_systypes (i_systypes.U):
3284 This variable conditionally defines the I_SYS_TYPES symbol,
3285 and indicates whether a C program should include <sys/types.h>.
3286
3287i_sysuio (i_sysuio.U):
3288 This variable conditionally defines the I_SYSUIO symbol, and indicates
3289 whether a C program should include <sys/uio.h>.
3290
3291i_sysun (i_sysun.U):
3292 This variable conditionally defines I_SYS_UN, which indicates
3293 to the C program that it should include <sys/un.h> to get UNIX
3294 domain socket definitions.
3295
d4935d7f
JH
3296i_sysutsname (i_sysutsname.U):
3297 This variable conditionally defines the I_SYSUTSNAME symbol,
3298 and indicates whether a C program should include <sys/utsname.h>.
3299
0545a864
JH
3300i_sysvfs (i_sysvfs.U):
3301 This variable conditionally defines the I_SYSVFS symbol,
3302 and indicates whether a C program should include <sys/vfs.h>.
3303
781b178c
JH
3304i_syswait (i_syswait.U):
3305 This variable conditionally defines I_SYS_WAIT, which indicates
3306 to the C program that it should include <sys/wait.h>.
3307
3308i_termio (i_termio.U):
3309 This variable conditionally defines the I_TERMIO symbol, which
3310 indicates to the C program that it should include <termio.h> rather
3311 than <sgtty.h>.
3312
3313i_termios (i_termio.U):
3314 This variable conditionally defines the I_TERMIOS symbol, which
3315 indicates to the C program that the POSIX <termios.h> file is
3316 to be included.
3317
3318i_time (i_time.U):
3319 This variable conditionally defines I_TIME, which indicates
3320 to the C program that it should include <time.h>.
3321
3322i_unistd (i_unistd.U):
3323 This variable conditionally defines the I_UNISTD symbol, and indicates
3324 whether a C program should include <unistd.h>.
3325
0545a864
JH
3326i_ustat (i_ustat.U):
3327 This variable conditionally defines the I_USTAT symbol, and indicates
3328 whether a C program should include <ustat.h>.
3329
781b178c
JH
3330i_utime (i_utime.U):
3331 This variable conditionally defines the I_UTIME symbol, and indicates
3332 whether a C program should include <utime.h>.
3333
3334i_values (i_values.U):
3335 This variable conditionally defines the I_VALUES symbol, and indicates
3336 whether a C program may include <values.h> to get symbols like MAXLONG
3337 and friends.
3338
3339i_varargs (i_varhdr.U):
3340 This variable conditionally defines I_VARARGS, which indicates
3341 to the C program that it should include <varargs.h>.
3342
3343i_varhdr (i_varhdr.U):
3344 Contains the name of the header to be included to get va_dcl definition.
3345 Typically one of varargs.h or stdarg.h.
3346
3347i_vfork (i_vfork.U):
3348 This variable conditionally defines the I_VFORK symbol, and indicates
3349 whether a C program should include vfork.h.
3350
3351ignore_versioned_solibs (libs.U):
3352 This variable should be non-empty if non-versioned shared
3353 libraries (libfoo.so.x.y) are to be ignored (because they
3354 cannot be linked against).
3355
ff935051
JH
3356inc_version_list (inc_version_list.U):
3357 This variable specifies the list of subdirectories in over
3358 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
3359 search when adding directories to @INC. The elements in
3360 the list are separated by spaces. This is only useful
ff935051
JH
3361 if you have a perl library directory tree structured like the
3362 default one. See INSTALL for how this works. The versioned
3363 site_perl directory was introduced in 5.005, so that is the
3364 lowest possible value.
3365
df4c34dc
MB
3366 This list includes architecture-dependent directories back to
3367 version $api_versionstring (e.g. 5.5.640) and
3368 architecture-independent directories all the way back to
3369 5.005.
3370
3a096bf3
JH
3371inc_version_list_init (inc_version_list.U):
3372 This variable holds the same list as inc_version_list, but
635aebb7 3373 each item is enclosed in double quotes and separated by commas,
3a096bf3
JH
3374 suitable for use in the PERL_INC_VERSION_LIST initialization.
3375
781b178c 3376incpath (usrinc.U):
209e5c0a
JH
3377 This variable must preceed the normal include path to get hte
3378 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
3379 Value can be "" or "/bsd43" on mips.
3380
3381inews (Loc.U):
3382 This variable is defined but not used by Configure.
fcdf39cf 3383 The value is the empty string and is not useful.
781b178c 3384
df4c34dc
MB
3385initialinstalllocation (bin.U):
3386 When userelocatableinc is true, this variable holds the location
3387 that make install should copy the perl binary to, with all the
3388 run-time relocatable paths calculated from this at install time.
3389 When used, it is initialised to the original value of binexp, and
3390 then binexp is set to '.../', as the other binaries are found
3391 relative to the perl binary.
3392
781b178c
JH
3393installarchlib (archlib.U):
3394 This variable is really the same as archlibexp but may differ on
3395 those systems using AFS. For extra portability, only this variable
3396 should be used in makefiles.
3397
3398installbin (bin.U):
3399 This variable is the same as binexp unless AFS is running in which case
3400 the user is explicitely prompted for it. This variable should always
3401 be used in your makefiles for maximum portability.
3402
10305dfa 3403installhtml1dir (html1dir.U):
635aebb7
AL
3404 This variable is really the same as html1direxp, unless you are
3405 using a different installprefix. For extra portability, you
10305dfa
JH
3406 should only use this variable within your makefiles.
3407
3408installhtml3dir (html3dir.U):
635aebb7
AL
3409 This variable is really the same as html3direxp, unless you are
3410 using a different installprefix. For extra portability, you
10305dfa
JH
3411 should only use this variable within your makefiles.
3412
781b178c
JH
3413installman1dir (man1dir.U):
3414 This variable is really the same as man1direxp, unless you are using
3415 AFS in which case it points to the read/write location whereas
3416 man1direxp only points to the read-only access location. For extra
3417 portability, you should only use this variable within your makefiles.
3418
3419installman3dir (man3dir.U):
3420 This variable is really the same as man3direxp, unless you are using
3421 AFS in which case it points to the read/write location whereas
3422 man3direxp only points to the read-only access location. For extra
3423 portability, you should only use this variable within your makefiles.
3424
3425installprefix (installprefix.U):
635aebb7 3426 This variable holds the name of the directory below which
781b178c
JH
3427 "make install" will install the package. For most users, this
3428 is the same as prefix. However, it is useful for
3429 installing the software into a different (usually temporary)
3430 location after which it can be bundled up and moved somehow
3431 to the final location specified by prefix.
3432
3433installprefixexp (installprefix.U):
3434 This variable holds the full absolute path of installprefix
3435 with all ~-expansion done.
3436
3437installprivlib (privlib.U):
3438 This variable is really the same as privlibexp but may differ on
3439 those systems using AFS. For extra portability, only this variable
3440 should be used in makefiles.
3441
3442installscript (scriptdir.U):
3443 This variable is usually the same as scriptdirexp, unless you are on
3444 a system running AFS, in which case they may differ slightly. You
3445 should always use this variable within your makefiles for portability.
3446
3447installsitearch (sitearch.U):
3448 This variable is really the same as sitearchexp but may differ on
3449 those systems using AFS. For extra portability, only this variable
3450 should be used in makefiles.
3451
0617aed7
JH
3452installsitebin (sitebin.U):
3453 This variable is usually the same as sitebinexp, unless you are on
3454 a system running AFS, in which case they may differ slightly. You
3455 should always use this variable within your makefiles for portability.
3456
e755722e
JH
3457installsitehtml1dir (sitehtml1dir.U):
3458 This variable is really the same as sitehtml1direxp, unless you are using
10305dfa
JH
3459 AFS in which case it points to the read/write location whereas
3460 html1direxp only points to the read-only access location. For extra
3461 portability, you should only use this variable within your makefiles.
3462
e755722e
JH
3463installsitehtml3dir (sitehtml3dir.U):
3464 This variable is really the same as sitehtml3direxp, unless you are using
10305dfa
JH
3465 AFS in which case it points to the read/write location whereas
3466 html3direxp only points to the read-only access location. For extra
3467 portability, you should only use this variable within your makefiles.
3468
781b178c
JH
3469installsitelib (sitelib.U):
3470 This variable is really the same as sitelibexp but may differ on
3471 those systems using AFS. For extra portability, only this variable
3472 should be used in makefiles.
3473
e755722e
JH
3474installsiteman1dir (siteman1dir.U):
3475 This variable is really the same as siteman1direxp, unless you are using
10305dfa
JH
3476 AFS in which case it points to the read/write location whereas
3477 man1direxp only points to the read-only access location. For extra
3478 portability, you should only use this variable within your makefiles.
3479
e755722e
JH
3480installsiteman3dir (siteman3dir.U):
3481 This variable is really the same as siteman3direxp, unless you are using
10305dfa
JH
3482 AFS in which case it points to the read/write location whereas
3483 man3direxp only points to the read-only access location. For extra
3484 portability, you should only use this variable within your makefiles.
3485
3486installsitescript (sitescript.U):
3487 This variable is usually the same as sitescriptexp, unless you are on
3488 a system running AFS, in which case they may differ slightly. You
3489 should always use this variable within your makefiles for portability.
3490
781b178c
JH
3491installstyle (installstyle.U):
3492 This variable describes the "style" of the perl installation.
3493 This is intended to be useful for tools that need to
3494 manipulate entire perl distributions. Perl itself doesn't use
3495 this to find its libraries -- the library directories are
3496 stored directly in Config.pm. Currently, there are only two
3497 styles: "lib" and "lib/perl5". The default library locations
3498 (e.g. privlib, sitelib) are either $prefix/lib or
3499 $prefix/lib/perl5. The former is useful if $prefix is a
3500 directory dedicated to perl (e.g. /opt/perl), while the latter
3501 is useful if $prefix is shared by many packages, e.g. if
3502 $prefix=/usr/local.
9c20e9bc 3503
123f32c0
MB
3504 Unfortunately, while this "style" variable is used to set
3505 defaults for all three directory hierarchies (core, vendor, and
3506 site), there is no guarantee that the same style is actually
3507 appropriate for all those directories. For example, $prefix
3508 might be /opt/perl, but $siteprefix might be /usr/local.
3509 (Perhaps, in retrospect, the "lib" style should never have been
3510 supported, but it did seem like a nice idea at the time.)
3511
3512 The situation is even less clear for tools such as MakeMaker
3513 that can be used to install additional modules into
3514 non-standard places. For example, if a user intends to install
3515 a module into a private directory (perhaps by setting PREFIX on
3516 the Makefile.PL command line), then there is no reason to
3517 assume that the Configure-time $installstyle setting will be
3518 relevant for that PREFIX.
3519
9c20e9bc 3520 This may later be extended to include other information, so
781b178c 3521 be careful with pattern-matching on the results.
9c20e9bc
JH
3522
3523 For compatibility with perl5.005 and earlier, the default
781b178c
JH
3524 setting is based on whether or not $prefix contains the string
3525 "perl".
3526
3527installusrbinperl (instubperl.U):
3528 This variable tells whether Perl should be installed also as
3529 /usr/bin/perl in addition to
3530 $installbin/perl
3531
526fdc24
MS
3532installvendorarch (vendorarch.U):
3533 This variable is really the same as vendorarchexp but may differ on
3534 those systems using AFS. For extra portability, only this variable
3535 should be used in makefiles.
3536
0617aed7
JH
3537installvendorbin (vendorbin.U):
3538 This variable is really the same as vendorbinexp but may differ on
3539 those systems using AFS. For extra portability, only this variable
3540 should be used in makefiles.
3541
e755722e
JH
3542installvendorhtml1dir (vendorhtml1dir.U):
3543 This variable is really the same as vendorhtml1direxp but may differ on
10305dfa
JH
3544 those systems using AFS. For extra portability, only this variable
3545 should be used in makefiles.
3546
e755722e
JH
3547installvendorhtml3dir (vendorhtml3dir.U):
3548 This variable is really the same as vendorhtml3direxp but may differ on
10305dfa
JH
3549 those systems using AFS. For extra portability, only this variable
3550 should be used in makefiles.
3551
a3635516
JH
3552installvendorlib (vendorlib.U):
3553 This variable is really the same as vendorlibexp but may differ on
3554 those systems using AFS. For extra portability, only this variable
3555 should be used in makefiles.
3556
e755722e
JH
3557installvendorman1dir (vendorman1dir.U):
3558 This variable is really the same as vendorman1direxp but may differ on
10305dfa
JH
3559 those systems using AFS. For extra portability, only this variable
3560 should be used in makefiles.
3561
e755722e
JH
3562installvendorman3dir (vendorman3dir.U):
3563 This variable is really the same as vendorman3direxp but may differ on
10305dfa
JH
3564 those systems using AFS. For extra portability, only this variable
3565 should be used in makefiles.
3566
3567installvendorscript (vendorscript.U):
3568 This variable is really the same as vendorscriptexp but may differ on
3569 those systems using AFS. For extra portability, only this variable
3570 should be used in makefiles.
3571
781b178c
JH
3572intsize (intsize.U):
3573 This variable contains the value of the INTSIZE symbol, which
3574 indicates to the C program how many bytes there are in an int.
3575
4b661809 3576issymlink (issymlink.U):
983dbef6
JH
3577 This variable holds the test command to test for a symbolic link
3578 (if they are supported). Typical values include 'test -h' and
3579 'test -L'.
4b661809 3580
a22e52b9
JH
3581ivdformat (perlxvf.U):
3582 This variable contains the format string used for printing
635aebb7 3583 a Perl IV as a signed decimal integer.
a22e52b9
JH
3584
3585ivsize (perlxv.U):
3586 This variable is the size of an IV in bytes.
3587
3588ivtype (perlxv.U):
3589 This variable contains the C type used for Perl's IV.
3590
781b178c 3591known_extensions (Extensions.U):
635aebb7 3592 This variable holds a list of all XS extensions included in
781b178c
JH
3593 the package.
3594
3595ksh (Loc.U):
3596 This variable is defined but not used by Configure.
fcdf39cf 3597 The value is the empty string and is not useful.
781b178c 3598
781b178c
JH
3599ld (dlsrc.U):
3600 This variable indicates the program to be used to link
3601 libraries for dynamic loading. On some systems, it is 'ld'.
3602 On ELF systems, it should be $cc. Mostly, we'll try to respect
3603 the hint file setting.
3604
3605lddlflags (dlsrc.U):
3606 This variable contains any special flags that might need to be
3607 passed to $ld to create a shared library suitable for dynamic
3608 loading. It is up to the makefile to use it. For hpux, it
3609 should be '-b'. For sunos 4.1, it is empty.
3610
3611ldflags (ccflags.U):
3612 This variable contains any additional C loader flags desired by
3613 the user. It is up to the Makefile to use this.
3614
af960fef
JH
3615ldflags_uselargefiles (uselfs.U):
3616 This variable contains the loader flags needed by large file builds
3617 and added to ldflags by hints files.
3618
781b178c
JH
3619ldlibpthname (libperl.U):
3620 This variable holds the name of the shared library
3621 search path, often LD_LIBRARY_PATH. To get an empty
3622 string, the hints file must set this to 'none'.
3623
3624less (Loc.U):
5bf26616 3625 This variable is used internally by Configure to determine the
781b178c
JH
3626 full pathname (if any) of the less program. After Configure runs,
3627 the value is reset to a plain "less" and is not useful.
3628
3629lib_ext (Unix.U):
3630 This is an old synonym for _a.
3631
3632libc (libc.U):
3633 This variable contains the location of the C library.
3634
3635libperl (libperl.U):
3636 The perl executable is obtained by linking perlmain.c with
3637 libperl, any static extensions (usually just DynaLoader),
3638 and any other libraries needed on this system. libperl
3639 is usually libperl.a, but can also be libperl.so.xxx if
3640 the user wishes to build a perl executable with a shared
3641 library.
3642
3643libpth (libpth.U):
3644 This variable holds the general path (space-separated) used to find
3645 libraries. It is intended to be used by other units.
3646
3647libs (libs.U):
3648 This variable holds the additional libraries we want to use.
9285ede2 3649 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3650
fe749a9f
JH
3651libsdirs (libs.U):
3652 This variable holds the directory names aka dirnames of the libraries
3653 we found and accepted, duplicates are removed.
3654
3655libsfiles (libs.U):
3656 This variable holds the filenames aka basenames of the libraries
3657 we found and accepted.
3658
3659libsfound (libs.U):
3660 This variable holds the full pathnames of the libraries
3661 we found and accepted.
3662
13b3f787
JH
3663libspath (libs.U):
3664 This variable holds the directory names probed for libraries.
3665
781b178c
JH
3666libswanted (Myinit.U):
3667 This variable holds a list of all the libraries we want to
3668 search. The order is chosen to pick up the c library
3669 ahead of ucb or bsd libraries for SVR4.
3670
af960fef
JH
3671libswanted_uselargefiles (uselfs.U):
3672 This variable contains the libraries needed by large file builds
3673 and added to ldflags by hints files. It is a space separated list
3674 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3675 like libswanted..
af960fef 3676
781b178c 3677line (Loc.U):
ff935051 3678 This variable is defined but not used by Configure.
fcdf39cf 3679 The value is the empty string and is not useful.
781b178c
JH
3680
3681lint (Loc.U):
3682 This variable is defined but not used by Configure.
fcdf39cf 3683 The value is the empty string and is not useful.
781b178c
JH
3684
3685lkflags (ccflags.U):
3686 This variable contains any additional C partial linker flags desired by
3687 the user. It is up to the Makefile to use this.
3688
3689ln (Loc.U):
5bf26616 3690 This variable is used internally by Configure to determine the
781b178c
JH
3691 full pathname (if any) of the ln program. After Configure runs,
3692 the value is reset to a plain "ln" and is not useful.
3693
3694lns (lns.U):
635aebb7 3695 This variable holds the name of the command to make
781b178c
JH
3696 symbolic links (if they are supported). It can be used
3697 in the Makefile. It is either 'ln -s' or 'ln'
3698
10bc17b6
JH
3699localtime_r_proto (d_localtime_r.U):
3700 This variable encodes the prototype of localtime_r.
39183afa
JH
3701 It is zero if d_localtime_r is undef, and one of the
3702 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3703 is defined.
10bc17b6 3704
781b178c
JH
3705locincpth (ccflags.U):
3706 This variable contains a list of additional directories to be
3707 searched by the compiler. The appropriate '-I' directives will
3708 be added to ccflags. This is intended to simplify setting
3709 local directories from the Configure command line.
3710 It's not much, but it parallels the loclibpth stuff in libpth.U.
3711
3712loclibpth (libpth.U):
3713 This variable holds the paths (space-separated) used to find local
3714 libraries. It is prepended to libpth, and is intended to be easily
3715 set from the command line.
3716
3717longdblsize (d_longdbl.U):
3718 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3719 indicates to the C program how many bytes there are in a long double,
3720 if this system supports long doubles.
3721
3722longlongsize (d_longlong.U):
3723 This variable contains the value of the LONGLONGSIZE symbol, which
3724 indicates to the C program how many bytes there are in a long long,
3725 if this system supports long long.
3726
3727longsize (intsize.U):
3728 This variable contains the value of the LONGSIZE symbol, which
3729 indicates to the C program how many bytes there are in a long.
3730
3731lp (Loc.U):
3732 This variable is defined but not used by Configure.
fcdf39cf 3733 The value is the empty string and is not useful.
781b178c
JH
3734
3735lpr (Loc.U):
3736 This variable is defined but not used by Configure.
fcdf39cf 3737 The value is the empty string and is not useful.
781b178c
JH
3738
3739ls (Loc.U):
5bf26616 3740 This variable is used internally by Configure to determine the
781b178c
JH
3741 full pathname (if any) of the ls program. After Configure runs,
3742 the value is reset to a plain "ls" and is not useful.
3743
3744lseeksize (lseektype.U):
635aebb7 3745 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3746 or whatever type is used to declare lseek offset's type in the
3747 kernel (which also appears to be lseek's return type).
3748
3749lseektype (lseektype.U):
635aebb7 3750 This variable defines lseektype to be something like off_t, long,
781b178c
JH
3751 or whatever type is used to declare lseek offset's type in the
3752 kernel (which also appears to be lseek's return type).
3753
d620c7b3 3754mad (mad.U):
a724edfe
NC
3755 This variable indicates that the Misc Attribute Definition code is to
3756 be compiled.
3757
52ca670a
MB
3758madlyh (mad.U):
3759 If the Misc Attribute Decoration is to be compiled, this variable is
3760 set to the name of the extra header files to be used, else it is ''
3761
3762madlyobj (mad.U):
3763 If the Misc Attribute Decoration is to be compiled, this variable is
3764 set to the name of the extra object files to be used, else it is ''
3765
3766madlysrc (mad.U):
3767 If the Misc Attribute Decoration is to be compiled, this variable is
3768 set to the name of the extra C source files to be used, else it is ''
3769
781b178c
JH
3770mail (Loc.U):
3771 This variable is defined but not used by Configure.
fcdf39cf 3772 The value is the empty string and is not useful.
781b178c
JH
3773
3774mailx (Loc.U):
3775 This variable is defined but not used by Configure.
fcdf39cf 3776 The value is the empty string and is not useful.
781b178c
JH
3777
3778make (Loc.U):
5bf26616 3779 This variable is used internally by Configure to determine the
c532c9d1
JH
3780 full pathname (if any) of the make program. After Configure runs,
3781 the value is reset to a plain "make" and is not useful.
3782
781b178c
JH
3783make_set_make (make.U):
3784 Some versions of 'make' set the variable MAKE. Others do not.
3785 This variable contains the string to be included in Makefile.SH
3786 so that MAKE is set if needed, and not if not needed.
3787 Possible values are:
44b94491 3788
781b178c 3789 make_set_make='#' # If your make program handles this for you,
44b94491 3790
781b178c 3791 make_set_make="MAKE=$make" # if it doesn't.
44b94491 3792
5bcaa86b 3793 This uses a comment character so that we can distinguish a
1d896104 3794 'set' value (from a previous config.sh or Configure '-D' option)
781b178c
JH
3795 from an uncomputed value.
3796
3797mallocobj (mallocsrc.U):
3798 This variable contains the name of the malloc.o that this package
3799 generates, if that malloc.o is preferred over the system malloc.
3800 Otherwise the value is null. This variable is intended for generating
3801 Makefiles. See mallocsrc.
3802
3803mallocsrc (mallocsrc.U):
3804 This variable contains the name of the malloc.c that comes with
3805 the package, if that malloc.c is preferred over the system malloc.
3806 Otherwise the value is null. This variable is intended for generating
3807 Makefiles.
3808
3809malloctype (mallocsrc.U):
3810 This variable contains the kind of ptr returned by malloc and realloc.
3811
3812man1dir (man1dir.U):
3813 This variable contains the name of the directory in which manual
3814 source pages are to be put. It is the responsibility of the
3815 Makefile.SH to get the value of this into the proper command.
3816 You must be prepared to do the ~name expansion yourself.
3817
3818man1direxp (man1dir.U):
3819 This variable is the same as the man1dir variable, but is filename
3820 expanded at configuration time, for convenient use in makefiles.
3821
3822man1ext (man1dir.U):
3823 This variable contains the extension that the manual page should
3824 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3825 See man1dir.
3826
3827man3dir (man3dir.U):
3828 This variable contains the name of the directory in which manual
3829 source pages are to be put. It is the responsibility of the
3830 Makefile.SH to get the value of this into the proper command.
3831 You must be prepared to do the ~name expansion yourself.
3832
3833man3direxp (man3dir.U):
3834 This variable is the same as the man3dir variable, but is filename
3835 expanded at configuration time, for convenient use in makefiles.
3836
3837man3ext (man3dir.U):
3838 This variable contains the extension that the manual page should
3839 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3840 See man3dir.
3841
781b178c
JH
3842mips_type (usrinc.U):
3843 This variable holds the environment type for the mips system.
3844 Possible values are "BSD 4.3" and "System V".
3845
65d1576c 3846mistrustnm (Csym.U):
5129fff4
JH
3847 This variable can be used to establish a fallthrough for the cases
3848 where nm fails to find a symbol. If usenm is false or usenm is true
3849 and mistrustnm is false, this variable has no effect. If usenm is true
3850 and mistrustnm is "compile", a test program will be compiled to try to
3851 find any symbol that can't be located via nm lookup. If mistrustnm is
3852 "run", the test program will be run as well as being compiled.
3853
781b178c 3854mkdir (Loc.U):
5bf26616 3855 This variable is used internally by Configure to determine the
781b178c
JH
3856 full pathname (if any) of the mkdir program. After Configure runs,
3857 the value is reset to a plain "mkdir" and is not useful.
3858
fe749a9f
JH
3859mmaptype (d_mmap.U):
3860 This symbol contains the type of pointer returned by mmap()
3861 (and simultaneously the type of the first argument).
3862 It can be 'void *' or 'caddr_t'.
3863
781b178c 3864modetype (modetype.U):
635aebb7
AL
3865 This variable defines modetype to be something like mode_t,
3866 int, unsigned short, or whatever type is used to declare file
781b178c
JH
3867 modes for system calls.
3868
3869more (Loc.U):
5bf26616 3870 This variable is used internally by Configure to determine the
781b178c
JH
3871 full pathname (if any) of the more program. After Configure runs,
3872 the value is reset to a plain "more" and is not useful.
3873
3874multiarch (multiarch.U):
3875 This variable conditionally defines the MULTIARCH symbol
3876 which signifies the presence of multiplatform files.
3877 This is normally set by hints files.
3878
3879mv (Loc.U):
3880 This variable is defined but not used by Configure.
fcdf39cf 3881 The value is the empty string and is not useful.
781b178c
JH
3882
3883myarchname (archname.U):
3884 This variable holds the architecture name computed by Configure in
3885 a previous run. It is not intended to be perused by any user and