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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.]
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11Mcc (Loc.U):
12 This variable is used internally by Configure to determine the
13 full pathname (if any) of the Mcc program. After Configure runs,
14 the value is reset to a plain "Mcc" and is not useful.
15
16PERL_REVISION (Oldsyms.U):
17 In a Perl version number such as 5.6.2, this is the 5.
18 This value is manually set in patchlevel.h
19
20PERL_SUBVERSION (Oldsyms.U):
21 In a Perl version number such as 5.6.2, this is the 2.
22 Values greater than 50 represent potentially unstable
23 development subversions.
24 This value is manually set in patchlevel.h
25
26PERL_VERSION (Oldsyms.U):
27 In a Perl version number such as 5.6.2, this is the 6.
28 This value is manually set in patchlevel.h
29
781b178c 30_a (Unix.U):
9285ede2 31 This variable defines the extension used for ordinary library files.
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32 For unix, it is '.a'. The '.' is included. Other possible
33 values include '.lib'.
34
35_exe (Unix.U):
36 This variable defines the extension used for executable files.
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37 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
38 On operating systems which do not require a specific extension
39 for executable files, this variable is empty.
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40
41_o (Unix.U):
42 This variable defines the extension used for object files.
43 For unix, it is '.o'. The '.' is included. Other possible
44 values include '.obj'.
45
46afs (afs.U):
47 This variable is set to 'true' if AFS (Andrew File System) is used
48 on the system, 'false' otherwise. It is possible to override this
49 with a hint value or command line option, but you'd better know
50 what you are doing.
51
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52afsroot (afs.U):
53 This variable is by default set to '/afs'. In the unlikely case
54 this is not the correct root, it is possible to override this with
55 a hint value or command line option. This will be used in subsequent
56 tests for AFSness in the Perl configure and test process.
57
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58alignbytes (alignbytes.U):
59 This variable holds the number of bytes required to align a
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60 double-- or a long double when applicable. Usual values are
61 2, 4 and 8. The default is eight, for safety.
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62
63ansi2knr (ansi2knr.U):
64 This variable is set if the user needs to run ansi2knr.
65 Currently, this is not supported, so we just abort.
66
67aphostname (d_gethname.U):
68 This variable contains the command which can be used to compute the
69 host name. The command is fully qualified by its absolute path, to make
70 it safe when used by a process with super-user privileges.
71
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72api_revision (patchlevel.U):
73 The three variables, api_revision, api_version, and
74 api_subversion, specify the version of the oldest perl binary
75 compatible with the present perl. In a full version string
76 such as '5.6.1', api_revision is the '5'.
77 Prior to 5.5.640, the format was a floating point number,
78 like 5.00563.
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79
80 perl.c:incpush() and lib/lib.pm will automatically search in
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81 $sitelib/.. for older directories back to the limit specified
82 by these api_ variables. This is only useful if you have a
83 perl library directory tree structured like the default one.
84 See INSTALL for how this works. The versioned site_perl
85 directory was introduced in 5.005, so that is the lowest
86 possible value. The version list appropriate for the current
87 system is determined in inc_version_list.U.
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88
89 XXX To do: Since compatibility can depend on compile time
08e5223a 90 options (such as bincompat, longlong, etc.) it should
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91 (perhaps) be set by Configure, but currently it isn't.
92 Currently, we read a hard-wired value from patchlevel.h.
93 Perhaps what we ought to do is take the hard-wired value from
94 patchlevel.h but then modify it if the current Configure
95 options warrant. patchlevel.h then would use an #ifdef guard.
96
97api_subversion (patchlevel.U):
98 The three variables, api_revision, api_version, and
99 api_subversion, specify the version of the oldest perl binary
100 compatible with the present perl. In a full version string
101 such as '5.6.1', api_subversion is the '1'. See api_revision for
102 full details.
103
104api_version (patchlevel.U):
105 The three variables, api_revision, api_version, and
106 api_subversion, specify the version of the oldest perl binary
107 compatible with the present perl. In a full version string
108 such as '5.6.1', api_version is the '6'. See api_revision for
109 full details. As a special case, 5.5.0 is rendered in the
110 old-style as 5.005. (In the 5.005_0x maintenance series,
111 this was the only versioned directory in $sitelib.)
112
113api_versionstring (patchlevel.U):
114 This variable combines api_revision, api_version, and
115 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
116 for use as a directory name. This is filesystem dependent.
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117
118ar (Loc.U):
5bf26616 119 This variable is used internally by Configure to determine the
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120 full pathname (if any) of the ar program. After Configure runs,
121 the value is reset to a plain "ar" and is not useful.
122
123archlib (archlib.U):
124 This variable holds the name of the directory in which the user wants
125 to put architecture-dependent public library files for $package.
126 It is most often a local directory such as /usr/local/lib.
127 Programs using this variable must be prepared to deal
128 with filename expansion.
129
130archlibexp (archlib.U):
131 This variable is the same as the archlib variable, but is
132 filename expanded at configuration time, for convenient use.
133
134archname64 (use64bits.U):
135 This variable is used for the 64-bitness part of $archname.
136
137archname (archname.U):
138 This variable is a short name to characterize the current
139 architecture. It is used mainly to construct the default archlib.
140
141archobjs (Unix.U):
142 This variable defines any additional objects that must be linked
143 in with the program on this architecture. On unix, it is usually
144 empty. It is typically used to include emulations of unix calls
145 or other facilities. For perl on OS/2, for example, this would
146 include os2/os2.obj.
147
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148asctime_r_proto (d_asctime_r.U):
149 This variable encodes the prototype of asctime_r.
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150 It is zero if d_asctime_r is undef, and one of the
151 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
152 is defined.
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781b178c 154awk (Loc.U):
5bf26616 155 This variable is used internally by Configure to determine the
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156 full pathname (if any) of the awk program. After Configure runs,
157 the value is reset to a plain "awk" and is not useful.
158
159baserev (baserev.U):
160 The base revision level of this package, from the .package file.
161
162bash (Loc.U):
163 This variable is defined but not used by Configure.
164 The value is a plain '' and is not useful.
165
166bin (bin.U):
167 This variable holds the name of the directory in which the user wants
168 to put publicly executable images for the package in question. It
169 is most often a local directory such as /usr/local/bin. Programs using
170 this variable must be prepared to deal with ~name substitution.
171
172binexp (bin.U):
173 This is the same as the bin variable, but is filename expanded at
174 configuration time, for use in your makefiles.
175
176bison (Loc.U):
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177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the bison program. After Configure runs,
179 the value is reset to a plain "bison" and is not useful.
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180
181byacc (Loc.U):
5bf26616 182 This variable is used internally by Configure to determine the
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183 full pathname (if any) of the byacc program. After Configure runs,
184 the value is reset to a plain "byacc" and is not useful.
185
186byteorder (byteorder.U):
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187 This variable holds the byte order in a UV. In the following,
188 larger digits indicate more significance. The variable byteorder
189 is either 4321 on a big-endian machine, or 1234 on a little-endian,
190 or 87654321 on a Cray ... or 3412 with weird order !
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191
192c (n.U):
193 This variable contains the \c string if that is what causes the echo
194 command to suppress newline. Otherwise it is null. Correct usage is
195 $echo $n "prompt for a question: $c".
196
197castflags (d_castneg.U):
198 This variable contains a flag that precise difficulties the
199 compiler has casting odd floating values to unsigned long:
200 0 = ok
201 1 = couldn't cast < 0
202 2 = couldn't cast >= 0x80000000
203 4 = couldn't cast in argument expression list
204
205cat (Loc.U):
5bf26616 206 This variable is used internally by Configure to determine the
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207 full pathname (if any) of the cat program. After Configure runs,
208 the value is reset to a plain "cat" and is not useful.
209
210cc (cc.U):
211 This variable holds the name of a command to execute a C compiler which
212 can resolve multiple global references that happen to have the same
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213 name. Usual values are 'cc' and 'gcc'.
214 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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215
216cccdlflags (dlsrc.U):
217 This variable contains any special flags that might need to be
218 passed with 'cc -c' to compile modules to be used to create a shared
219 library that will be used for dynamic loading. For hpux, this
220 should be +z. It is up to the makefile to use it.
221
222ccdlflags (dlsrc.U):
223 This variable contains any special flags that might need to be
224 passed to cc to link with a shared library for dynamic loading.
225 It is up to the makefile to use it. For sunos 4.1, it should
226 be empty.
227
228ccflags (ccflags.U):
229 This variable contains any additional C compiler flags desired by
230 the user. It is up to the Makefile to use this.
231
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232ccflags_uselargefiles (uselfs.U):
233 This variable contains the compiler flags needed by large file builds
234 and added to ccflags by hints files.
235
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236ccname (Checkcc.U):
237 This can set either by hints files or by Configure. If using
238 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
239 Some platforms, however, make good use of this by storing the
240 flavor of the C compiler being used here. For example if using
241 the Sun WorkShop suite, ccname will be 'workshop'.
242
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243ccsymbols (Cppsym.U):
244 The variable contains the symbols defined by the C compiler alone.
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245 The symbols defined by cpp or by cc when it calls cpp are not in
246 this list, see cppsymbols and cppccsymbols.
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247 The list is a space-separated list of symbol=value tokens.
248
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249ccversion (Checkcc.U):
250 This can set either by hints files or by Configure. If using
251 a (non-gcc) vendor cc, this variable may contain a version for
252 the compiler.
253
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254cf_by (cf_who.U):
255 Login name of the person who ran the Configure script and answered the
256 questions. This is used to tag both config.sh and config_h.SH.
257
258cf_email (cf_email.U):
259 Electronic mail address of the person who ran Configure. This can be
260 used by units that require the user's e-mail, like MailList.U.
261
262cf_time (cf_who.U):
263 Holds the output of the "date" command when the configuration file was
264 produced. This is used to tag both config.sh and config_h.SH.
265
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266charsize (charsize.U):
267 This variable contains the value of the CHARSIZE symbol, which
268 indicates to the C program how many bytes there are in a character.
269
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270chgrp (Loc.U):
271 This variable is defined but not used by Configure.
272 The value is a plain '' and is not useful.
273
274chmod (Loc.U):
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275 This variable is used internally by Configure to determine the
276 full pathname (if any) of the chmod program. After Configure runs,
277 the value is reset to a plain "chmod" and is not useful.
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278
279chown (Loc.U):
280 This variable is defined but not used by Configure.
281 The value is a plain '' and is not useful.
282
283clocktype (d_times.U):
284 This variable holds the type returned by times(). It can be long,
285 or clock_t on BSD sites (in which case <sys/types.h> should be
286 included).
287
288comm (Loc.U):
5bf26616 289 This variable is used internally by Configure to determine the
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290 full pathname (if any) of the comm program. After Configure runs,
291 the value is reset to a plain "comm" and is not useful.
292
293compress (Loc.U):
294 This variable is defined but not used by Configure.
295 The value is a plain '' and is not useful.
296
297contains (contains.U):
298 This variable holds the command to do a grep with a proper return
299 status. On most sane systems it is simply "grep". On insane systems
300 it is a grep followed by a cat followed by a test. This variable
301 is primarily for the use of other Configure units.
302
303cp (Loc.U):
5bf26616 304 This variable is used internally by Configure to determine the
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305 full pathname (if any) of the cp program. After Configure runs,
306 the value is reset to a plain "cp" and is not useful.
307
308cpio (Loc.U):
309 This variable is defined but not used by Configure.
310 The value is a plain '' and is not useful.
311
312cpp (Loc.U):
5bf26616 313 This variable is used internally by Configure to determine the
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314 full pathname (if any) of the cpp program. After Configure runs,
315 the value is reset to a plain "cpp" and is not useful.
316
317cpp_stuff (cpp_stuff.U):
318 This variable contains an identification of the catenation mechanism
319 used by the C preprocessor.
320
321cppccsymbols (Cppsym.U):
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322 The variable contains the symbols defined by the C compiler
323 when it calls cpp. The symbols defined by the cc alone or cpp
324 alone are not in this list, see ccsymbols and cppsymbols.
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325 The list is a space-separated list of symbol=value tokens.
326
327cppflags (ccflags.U):
328 This variable holds the flags that will be passed to the C pre-
329 processor. It is up to the Makefile to use it.
330
331cpplast (cppstdin.U):
332 This variable has the same functionality as cppminus, only it applies
333 to cpprun and not cppstdin.
334
335cppminus (cppstdin.U):
336 This variable contains the second part of the string which will invoke
337 the C preprocessor on the standard input and produce to standard
338 output. This variable will have the value "-" if cppstdin needs
339 a minus to specify standard input, otherwise the value is "".
340
341cpprun (cppstdin.U):
342 This variable contains the command which will invoke a C preprocessor
343 on standard input and put the output to stdout. It is guaranteed not
344 to be a wrapper and may be a null string if no preprocessor can be
345 made directly available. This preprocessor might be different from the
346 one used by the C compiler. Don't forget to append cpplast after the
347 preprocessor options.
348
349cppstdin (cppstdin.U):
350 This variable contains the command which will invoke the C
351 preprocessor on standard input and put the output to stdout.
352 It is primarily used by other Configure units that ask about
353 preprocessor symbols.
354
355cppsymbols (Cppsym.U):
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356 The variable contains the symbols defined by the C preprocessor
357 alone. The symbols defined by cc or by cc when it calls cpp are
358 not in this list, see ccsymbols and cppccsymbols.
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359 The list is a space-separated list of symbol=value tokens.
360
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361crypt_r_proto (d_crypt_r.U):
362 This variable encodes the prototype of crypt_r.
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363 It is zero if d_crypt_r is undef, and one of the
364 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
365 is defined.
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367cryptlib (d_crypt.U):
368 This variable holds -lcrypt or the path to a libcrypt.a archive if
369 the crypt() function is not defined in the standard C library. It is
370 up to the Makefile to use this.
371
372csh (Loc.U):
5bf26616 373 This variable is used internally by Configure to determine the
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374 full pathname (if any) of the csh program. After Configure runs,
375 the value is reset to a plain "csh" and is not useful.
376
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377ctermid_r_proto (d_ctermid_r.U):
378 This variable encodes the prototype of ctermid_r.
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379 It is zero if d_ctermid_r is undef, and one of the
380 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
381 is defined.
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382
383ctime_r_proto (d_ctime_r.U):
384 This variable encodes the prototype of ctime_r.
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385 It is zero if d_ctime_r is undef, and one of the
386 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
387 is defined.
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389d_Gconvert (d_gconvert.U):
390 This variable holds what Gconvert is defined as to convert
391 floating point numbers into strings. By default, Configure
392 sets this macro to use the first of gconvert, gcvt, or sprintf
393 that pass sprintf-%g-like behaviour tests. If perl is using
394 long doubles, the macro uses the first of the following
395 functions that pass Configure's tests: qgcvt, sprintf (if
396 Configure knows how to make sprintf format long doubles--see
397 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
398 The gconvert_preference and gconvert_ld_preference variables
399 can be used to alter Configure's preferences, for doubles and
400 long doubles, respectively. If present, they contain a
401 space-separated list of one or more of the above function
402 names in the order they should be tried.
403
404 d_Gconvert may be set to override Configure with a platform-
405 specific function. If this function expects a double, a
406 different value may need to be set by the uselongdouble.cbu
407 call-back unit so that long doubles can be formatted without
408 loss of precision.
409
410d_PRIEUldbl (longdblfio.U):
411 This variable conditionally defines the PERL_PRIfldbl symbol, which
412 indiciates that stdio has a symbol to print long doubles.
413 The 'U' in the name is to separate this from d_PRIeldbl so that even
414 case-blind systems can see the difference.
415
416d_PRIFUldbl (longdblfio.U):
417 This variable conditionally defines the PERL_PRIfldbl symbol, which
418 indiciates that stdio has a symbol to print long doubles.
419 The 'U' in the name is to separate this from d_PRIfldbl so that even
420 case-blind systems can see the difference.
421
422d_PRIGUldbl (longdblfio.U):
423 This variable conditionally defines the PERL_PRIfldbl symbol, which
424 indiciates that stdio has a symbol to print long doubles.
425 The 'U' in the name is to separate this from d_PRIgldbl so that even
426 case-blind systems can see the difference.
427
428d_PRIXU64 (quadfio.U):
429 This variable conditionally defines the PERL_PRIXU64 symbol, which
430 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
431 The 'U' in the name is to separate this from d_PRIx64 so that even
432 case-blind systems can see the difference.
433
434d_PRId64 (quadfio.U):
435 This variable conditionally defines the PERL_PRId64 symbol, which
436 indiciates that stdio has a symbol to print 64-bit decimal numbers.
437
438d_PRIeldbl (longdblfio.U):
439 This variable conditionally defines the PERL_PRIfldbl symbol, which
440 indiciates that stdio has a symbol to print long doubles.
441
442d_PRIfldbl (longdblfio.U):
443 This variable conditionally defines the PERL_PRIfldbl symbol, which
444 indiciates that stdio has a symbol to print long doubles.
445
446d_PRIgldbl (longdblfio.U):
447 This variable conditionally defines the PERL_PRIfldbl symbol, which
448 indiciates that stdio has a symbol to print long doubles.
449
450d_PRIi64 (quadfio.U):
451 This variable conditionally defines the PERL_PRIi64 symbol, which
452 indiciates that stdio has a symbol to print 64-bit decimal numbers.
453
454d_PRIo64 (quadfio.U):
455 This variable conditionally defines the PERL_PRIo64 symbol, which
456 indiciates that stdio has a symbol to print 64-bit octal numbers.
457
458d_PRIu64 (quadfio.U):
459 This variable conditionally defines the PERL_PRIu64 symbol, which
460 indiciates that stdio has a symbol to print 64-bit unsigned decimal
461 numbers.
462
463d_PRIx64 (quadfio.U):
464 This variable conditionally defines the PERL_PRIx64 symbol, which
465 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
466
467d_SCNfldbl (longdblfio.U):
468 This variable conditionally defines the PERL_PRIfldbl symbol, which
469 indiciates that stdio has a symbol to scan long doubles.
470
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471d__fwalk (d__fwalk.U):
472 This variable conditionally defines HAS__FWALK if _fwalk() is
473 available to apply a function to all the file handles.
474
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475d_access (d_access.U):
476 This variable conditionally defines HAS_ACCESS if the access() system
477 call is available to check for access permissions using real IDs.
478
479d_accessx (d_accessx.U):
480 This variable conditionally defines the HAS_ACCESSX symbol, which
481 indicates to the C program that the accessx() routine is available.
482
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483d_aintl (d_aintl.U):
484 This variable conditionally defines the HAS_AINTL symbol, which
485 indicates to the C program that the aintl() routine is available.
486 If copysignl is also present we can emulate modfl.
487
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488d_alarm (d_alarm.U):
489 This variable conditionally defines the HAS_ALARM symbol, which
490 indicates to the C program that the alarm() routine is available.
491
492d_archlib (archlib.U):
493 This variable conditionally defines ARCHLIB to hold the pathname
494 of architecture-dependent library files for $package. If
495 $archlib is the same as $privlib, then this is set to undef.
496
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497d_asctime_r (d_asctime_r.U):
498 This variable conditionally defines the HAS_ASCTIME_R symbol,
499 which indicates to the C program that the asctime_r()
500 routine is available.
501
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502d_atolf (atolf.U):
503 This variable conditionally defines the HAS_ATOLF symbol, which
504 indicates to the C program that the atolf() routine is available.
505
506d_atoll (atoll.U):
507 This variable conditionally defines the HAS_ATOLL symbol, which
508 indicates to the C program that the atoll() routine is available.
509
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510d_attribut (d_attribut.U):
511 This variable conditionally defines HASATTRIBUTE, which
512 indicates the C compiler can check for function attributes,
513 such as printf formats.
514
515d_bcmp (d_bcmp.U):
516 This variable conditionally defines the HAS_BCMP symbol if
517 the bcmp() routine is available to compare strings.
518
519d_bcopy (d_bcopy.U):
520 This variable conditionally defines the HAS_BCOPY symbol if
521 the bcopy() routine is available to copy strings.
522
523d_bsd (Guess.U):
524 This symbol conditionally defines the symbol BSD when running on a
525 BSD system.
526
527d_bsdgetpgrp (d_getpgrp.U):
528 This variable conditionally defines USE_BSD_GETPGRP if
529 getpgrp needs one arguments whereas USG one needs none.
530
531d_bsdsetpgrp (d_setpgrp.U):
532 This variable conditionally defines USE_BSD_SETPGRP if
533 setpgrp needs two arguments whereas USG one needs none.
534 See also d_setpgid for a POSIX interface.
535
536d_bzero (d_bzero.U):
537 This variable conditionally defines the HAS_BZERO symbol if
538 the bzero() routine is available to set memory to 0.
539
540d_casti32 (d_casti32.U):
541 This variable conditionally defines CASTI32, which indicates
542 whether the C compiler can cast large floats to 32-bit ints.
543
544d_castneg (d_castneg.U):
545 This variable conditionally defines CASTNEG, which indicates
546 wether the C compiler can cast negative float to unsigned.
547
548d_charvspr (d_vprintf.U):
549 This variable conditionally defines CHARVSPRINTF if this system
550 has vsprintf returning type (char*). The trend seems to be to
551 declare it as "int vsprintf()".
552
553d_chown (d_chown.U):
554 This variable conditionally defines the HAS_CHOWN symbol, which
555 indicates to the C program that the chown() routine is available.
556
557d_chroot (d_chroot.U):
558 This variable conditionally defines the HAS_CHROOT symbol, which
559 indicates to the C program that the chroot() routine is available.
560
561d_chsize (d_chsize.U):
562 This variable conditionally defines the CHSIZE symbol, which
563 indicates to the C program that the chsize() routine is available
564 to truncate files. You might need a -lx to get this routine.
565
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566d_class (d_class.U):
567 This variable conditionally defines the HAS_CLASS symbol, which
568 indicates to the C program that the class() routine is available.
569
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570d_closedir (d_closedir.U):
571 This variable conditionally defines HAS_CLOSEDIR if closedir() is
572 available.
573
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574d_cmsghdr_s (d_cmsghdr_s.U):
575 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
576 which indicates that the struct cmsghdr is supported.
577
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578d_const (d_const.U):
579 This variable conditionally defines the HASCONST symbol, which
580 indicates to the C program that this C compiler knows about the
581 const type.
582
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583d_copysignl (d_copysignl.U):
584 This variable conditionally defines the HAS_COPYSIGNL symbol, which
585 indicates to the C program that the copysignl() routine is available.
586 If aintl is also present we can emulate modfl.
587
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588d_crypt (d_crypt.U):
589 This variable conditionally defines the CRYPT symbol, which
590 indicates to the C program that the crypt() routine is available
591 to encrypt passwords and the like.
592
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593d_crypt_r (d_crypt_r.U):
594 This variable conditionally defines the HAS_CRYPT_R symbol,
595 which indicates to the C program that the crypt_r()
596 routine is available.
597
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598d_csh (d_csh.U):
599 This variable conditionally defines the CSH symbol, which
600 indicates to the C program that the C-shell exists.
601
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602d_ctermid_r (d_ctermid_r.U):
603 This variable conditionally defines the HAS_CTERMID_R symbol,
604 which indicates to the C program that the ctermid_r()
605 routine is available.
606
607d_ctime_r (d_ctime_r.U):
608 This variable conditionally defines the HAS_CTIME_R symbol,
609 which indicates to the C program that the ctime_r()
610 routine is available.
611
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612d_cuserid (d_cuserid.U):
613 This variable conditionally defines the HAS_CUSERID symbol, which
614 indicates to the C program that the cuserid() routine is available
615 to get character login names.
616
617d_dbl_dig (d_dbl_dig.U):
618 This variable conditionally defines d_dbl_dig if this system's
619 header files provide DBL_DIG, which is the number of significant
620 digits in a double precision number.
621
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622d_dbminitproto (d_dbminitproto.U):
623 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
624 which indicates to the C program that the system provides
625 a prototype for the dbminit() function. Otherwise, it is
626 up to the program to supply one.
627
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628d_difftime (d_difftime.U):
629 This variable conditionally defines the HAS_DIFFTIME symbol, which
630 indicates to the C program that the difftime() routine is available.
631
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632d_dirfd (d_dirfd.U):
633 This variable conditionally defines the HAS_DIRFD constant,
634 which indicates to the C program that dirfd() is available
635 to return the file descriptor of a directory stream.
636
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637d_dirnamlen (i_dirent.U):
638 This variable conditionally defines DIRNAMLEN, which indicates
639 to the C program that the length of directory entry names is
640 provided by a d_namelen field.
641
642d_dlerror (d_dlerror.U):
643 This variable conditionally defines the HAS_DLERROR symbol, which
644 indicates to the C program that the dlerror() routine is available.
645
646d_dlopen (d_dlopen.U):
647 This variable conditionally defines the HAS_DLOPEN symbol, which
648 indicates to the C program that the dlopen() routine is available.
649
650d_dlsymun (d_dlsymun.U):
651 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
652 indicates that we need to prepend an underscore to the symbol
653 name before calling dlsym().
654
655d_dosuid (d_dosuid.U):
656 This variable conditionally defines the symbol DOSUID, which
657 tells the C program that it should insert setuid emulation code
658 on hosts which have setuid #! scripts disabled.
659
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660d_drand48_r (d_drand48_r.U):
661 This variable conditionally defines the HAS_DRAND48_R symbol,
662 which indicates to the C program that the drand48_r()
663 routine is available.
664
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665d_drand48proto (d_drand48proto.U):
666 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
667 which indicates to the C program that the system provides
668 a prototype for the drand48() function. Otherwise, it is
669 up to the program to supply one.
670
671d_dup2 (d_dup2.U):
672 This variable conditionally defines HAS_DUP2 if dup2() is
673 available to duplicate file descriptors.
674
675d_eaccess (d_eaccess.U):
676 This variable conditionally defines the HAS_EACCESS symbol, which
677 indicates to the C program that the eaccess() routine is available.
678
679d_endgrent (d_endgrent.U):
680 This variable conditionally defines the HAS_ENDGRENT symbol, which
681 indicates to the C program that the endgrent() routine is available
682 for sequential access of the group database.
683
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684d_endgrent_r (d_endgrent_r.U):
685 This variable conditionally defines the HAS_ENDGRENT_R symbol,
686 which indicates to the C program that the endgrent_r()
687 routine is available.
688
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689d_endhent (d_endhent.U):
690 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
691 available to close whatever was being used for host queries.
692
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693d_endhostent_r (d_endhostent_r.U):
694 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
695 which indicates to the C program that the endhostent_r()
696 routine is available.
697
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698d_endnent (d_endnent.U):
699 This variable conditionally defines HAS_ENDNETENT if endnetent() is
700 available to close whatever was being used for network queries.
701
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702d_endnetent_r (d_endnetent_r.U):
703 This variable conditionally defines the HAS_ENDNETENT_R symbol,
704 which indicates to the C program that the endnetent_r()
705 routine is available.
706
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707d_endpent (d_endpent.U):
708 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
709 available to close whatever was being used for protocol queries.
710
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711d_endprotoent_r (d_endprotoent_r.U):
712 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
713 which indicates to the C program that the endprotoent_r()
714 routine is available.
715
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716d_endpwent (d_endpwent.U):
717 This variable conditionally defines the HAS_ENDPWENT symbol, which
718 indicates to the C program that the endpwent() routine is available
719 for sequential access of the passwd database.
720
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721d_endpwent_r (d_endpwent_r.U):
722 This variable conditionally defines the HAS_ENDPWENT_R symbol,
723 which indicates to the C program that the endpwent_r()
724 routine is available.
725
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726d_endsent (d_endsent.U):
727 This variable conditionally defines HAS_ENDSERVENT if endservent() is
728 available to close whatever was being used for service queries.
729
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730d_endservent_r (d_endservent_r.U):
731 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
732 which indicates to the C program that the endservent_r()
733 routine is available.
734
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735d_eofnblk (nblock_io.U):
736 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
737 when reading from a non-blocking I/O source.
738
739d_eunice (Guess.U):
740 This variable conditionally defines the symbols EUNICE and VAX, which
741 alerts the C program that it must deal with ideosyncracies of VMS.
742
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743d_fchdir (d_fchdir.U):
744 This variable conditionally defines the HAS_FCHDIR symbol, which
745 indicates to the C program that the fchdir() routine is available.
746
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747d_fchmod (d_fchmod.U):
748 This variable conditionally defines the HAS_FCHMOD symbol, which
749 indicates to the C program that the fchmod() routine is available
750 to change mode of opened files.
751
752d_fchown (d_fchown.U):
753 This variable conditionally defines the HAS_FCHOWN symbol, which
754 indicates to the C program that the fchown() routine is available
755 to change ownership of opened files.
756
757d_fcntl (d_fcntl.U):
758 This variable conditionally defines the HAS_FCNTL symbol, and indicates
759 whether the fcntl() function exists
760
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761d_fcntl_can_lock (d_fcntl_can_lock.U):
762 This variable conditionally defines the FCNTL_CAN_LOCK symbol
763 and indicates whether file locking with fcntl() works.
764
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765d_fd_macros (d_fd_set.U):
766 This variable contains the eventual value of the HAS_FD_MACROS symbol,
767 which indicates if your C compiler knows about the macros which
768 manipulate an fd_set.
769
770d_fd_set (d_fd_set.U):
771 This variable contains the eventual value of the HAS_FD_SET symbol,
772 which indicates if your C compiler knows about the fd_set typedef.
773
774d_fds_bits (d_fd_set.U):
775 This variable contains the eventual value of the HAS_FDS_BITS symbol,
776 which indicates if your fd_set typedef contains the fds_bits member.
777 If you have an fd_set typedef, but the dweebs who installed it did
778 a half-fast job and neglected to provide the macros to manipulate
779 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
780
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781d_fgetpos (d_fgetpos.U):
782 This variable conditionally defines HAS_FGETPOS if fgetpos() is
783 available to get the file position indicator.
784
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785d_finite (d_finite.U):
786 This variable conditionally defines the HAS_FINITE symbol, which
787 indicates to the C program that the finite() routine is available.
788
789d_finitel (d_finitel.U):
790 This variable conditionally defines the HAS_FINITEL symbol, which
791 indicates to the C program that the finitel() routine is available.
792
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793d_flexfnam (d_flexfnam.U):
794 This variable conditionally defines the FLEXFILENAMES symbol, which
795 indicates that the system supports filenames longer than 14 characters.
796
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797d_flock (d_flock.U):
798 This variable conditionally defines HAS_FLOCK if flock() is
799 available to do file locking.
800
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801d_flockproto (d_flockproto.U):
802 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
803 which indicates to the C program that the system provides
804 a prototype for the flock() function. Otherwise, it is
805 up to the program to supply one.
806
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807d_fork (d_fork.U):
808 This variable conditionally defines the HAS_FORK symbol, which
809 indicates to the C program that the fork() routine is available.
810
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811d_fp_class (d_fp_class.U):
812 This variable conditionally defines the HAS_FP_CLASS symbol, which
813 indicates to the C program that the fp_class() routine is available.
814
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815d_fpathconf (d_pathconf.U):
816 This variable conditionally defines the HAS_FPATHCONF symbol, which
817 indicates to the C program that the pathconf() routine is available
818 to determine file-system related limits and options associated
819 with a given open file descriptor.
820
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821d_fpclass (d_fpclass.U):
822 This variable conditionally defines the HAS_FPCLASS symbol, which
823 indicates to the C program that the fpclass() routine is available.
824
825d_fpclassify (d_fpclassify.U):
826 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
827 indicates to the C program that the fpclassify() routine is available.
828
829d_fpclassl (d_fpclassl.U):
830 This variable conditionally defines the HAS_FPCLASSL symbol, which
831 indicates to the C program that the fpclassl() routine is available.
832
c890dc6c 833d_fpos64_t (d_fpos64_t.U):
ca24dfc6 834 This symbol will be defined if the C compiler supports fpos64_t.
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836d_frexpl (d_frexpl.U):
837 This variable conditionally defines the HAS_FREXPL symbol, which
838 indicates to the C program that the frexpl() routine is available.
839
ad27e871 840d_fs_data_s (d_fs_data_s.U):
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841 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
842 which indicates that the struct fs_data is supported.
843
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844d_fseeko (d_fseeko.U):
845 This variable conditionally defines the HAS_FSEEKO symbol, which
846 indicates to the C program that the fseeko() routine is available.
847
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848d_fsetpos (d_fsetpos.U):
849 This variable conditionally defines HAS_FSETPOS if fsetpos() is
850 available to set the file position indicator.
851
0545a864 852d_fstatfs (d_fstatfs.U):
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853 This variable conditionally defines the HAS_FSTATFS symbol, which
854 indicates to the C program that the fstatfs() routine is available.
855
856d_fstatvfs (d_statvfs.U):
857 This variable conditionally defines the HAS_FSTATVFS symbol, which
858 indicates to the C program that the fstatvfs() routine is available.
859
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860d_fsync (d_fsync.U):
861 This variable conditionally defines the HAS_FSYNC symbol, which
862 indicates to the C program that the fsync() routine is available.
863
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864d_ftello (d_ftello.U):
865 This variable conditionally defines the HAS_FTELLO symbol, which
866 indicates to the C program that the ftello() routine is available.
867
868d_ftime (d_ftime.U):
869 This variable conditionally defines the HAS_FTIME symbol, which indicates
870 that the ftime() routine exists. The ftime() routine is basically
871 a sub-second accuracy clock.
872
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873d_getcwd (d_getcwd.U):
874 This variable conditionally defines the HAS_GETCWD symbol, which
875 indicates to the C program that the getcwd() routine is available
876 to get the current working directory.
877
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878d_getespwnam (d_getespwnam.U):
879 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
880 available to retrieve enchanced (shadow) password entries by name.
881
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882d_getfsstat (d_getfsstat.U):
883 This variable conditionally defines the HAS_GETFSSTAT symbol, which
884 indicates to the C program that the getfsstat() routine is available.
885
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886d_getgrent (d_getgrent.U):
887 This variable conditionally defines the HAS_GETGRENT symbol, which
888 indicates to the C program that the getgrent() routine is available
889 for sequential access of the group database.
890
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891d_getgrent_r (d_getgrent_r.U):
892 This variable conditionally defines the HAS_GETGRENT_R symbol,
893 which indicates to the C program that the getgrent_r()
894 routine is available.
895
896d_getgrgid_r (d_getgrgid_r.U):
897 This variable conditionally defines the HAS_GETGRGID_R symbol,
898 which indicates to the C program that the getgrgid_r()
899 routine is available.
900
901d_getgrnam_r (d_getgrnam_r.U):
902 This variable conditionally defines the HAS_GETGRNAM_R symbol,
903 which indicates to the C program that the getgrnam_r()
904 routine is available.
905
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906d_getgrps (d_getgrps.U):
907 This variable conditionally defines the HAS_GETGROUPS symbol, which
908 indicates to the C program that the getgroups() routine is available
909 to get the list of process groups.
910
911d_gethbyaddr (d_gethbyad.U):
912 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
913 indicates to the C program that the gethostbyaddr() routine is available
914 to look up hosts by their IP addresses.
915
916d_gethbyname (d_gethbynm.U):
917 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
918 indicates to the C program that the gethostbyname() routine is available
919 to look up host names in some data base or other.
920
921d_gethent (d_gethent.U):
922 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
923 available to look up host names in some data base or another.
924
925d_gethname (d_gethname.U):
926 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
927 indicates to the C program that the gethostname() routine may be
928 used to derive the host name.
929
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930d_gethostbyaddr_r (d_gethostbyaddr_r.U):
931 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
932 which indicates to the C program that the gethostbyaddr_r()
933 routine is available.
934
935d_gethostbyname_r (d_gethostbyname_r.U):
936 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
937 which indicates to the C program that the gethostbyname_r()
938 routine is available.
939
940d_gethostent_r (d_gethostent_r.U):
941 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
942 which indicates to the C program that the gethostent_r()
943 routine is available.
944
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945d_gethostprotos (d_gethostprotos.U):
946 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
947 which indicates to the C program that <netdb.h> supplies
948 prototypes for the various gethost*() functions.
949 See also netdbtype.U for probing for various netdb types.
950
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951d_getitimer (d_getitimer.U):
952 This variable conditionally defines the HAS_GETITIMER symbol, which
953 indicates to the C program that the getitimer() routine is available.
954
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955d_getlogin (d_getlogin.U):
956 This variable conditionally defines the HAS_GETLOGIN symbol, which
957 indicates to the C program that the getlogin() routine is available
958 to get the login name.
959
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960d_getlogin_r (d_getlogin_r.U):
961 This variable conditionally defines the HAS_GETLOGIN_R symbol,
962 which indicates to the C program that the getlogin_r()
963 routine is available.
964
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965d_getmnt (d_getmnt.U):
966 This variable conditionally defines the HAS_GETMNT symbol, which
967 indicates to the C program that the getmnt() routine is available
968 to retrieve one or more mount info blocks by filename.
969
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970d_getmntent (d_getmntent.U):
971 This variable conditionally defines the HAS_GETMNTENT symbol, which
972 indicates to the C program that the getmntent() routine is available
0617aed7 973 to iterate through mounted files to get their mount info.
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974
975d_getnbyaddr (d_getnbyad.U):
976 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
977 indicates to the C program that the getnetbyaddr() routine is available
978 to look up networks by their IP addresses.
979
980d_getnbyname (d_getnbynm.U):
981 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
982 indicates to the C program that the getnetbyname() routine is available
983 to look up networks by their names.
984
985d_getnent (d_getnent.U):
986 This variable conditionally defines HAS_GETNETENT if getnetent() is
987 available to look up network names in some data base or another.
988
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989d_getnetbyaddr_r (d_getnetbyaddr_r.U):
990 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
991 which indicates to the C program that the getnetbyaddr_r()
992 routine is available.
993
994d_getnetbyname_r (d_getnetbyname_r.U):
995 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
996 which indicates to the C program that the getnetbyname_r()
997 routine is available.
998
999d_getnetent_r (d_getnetent_r.U):
1000 This variable conditionally defines the HAS_GETNETENT_R symbol,
1001 which indicates to the C program that the getnetent_r()
1002 routine is available.
1003
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1004d_getnetprotos (d_getnetprotos.U):
1005 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1006 which indicates to the C program that <netdb.h> supplies
1007 prototypes for the various getnet*() functions.
1008 See also netdbtype.U for probing for various netdb types.
1009
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1010d_getpagsz (d_getpagsz.U):
1011 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1012 is available to get the system page size.
1013
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1014d_getpbyname (d_getprotby.U):
1015 This variable conditionally defines the HAS_GETPROTOBYNAME
1016 symbol, which indicates to the C program that the
1017 getprotobyname() routine is available to look up protocols
1018 by their name.
1019
1020d_getpbynumber (d_getprotby.U):
1021 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1022 symbol, which indicates to the C program that the
1023 getprotobynumber() routine is available to look up protocols
1024 by their number.
1025
1026d_getpent (d_getpent.U):
1027 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1028 available to look up protocols in some data base or another.
1029
1030d_getpgid (d_getpgid.U):
1031 This variable conditionally defines the HAS_GETPGID symbol, which
1032 indicates to the C program that the getpgid(pid) function
1033 is available to get the process group id.
1034
1035d_getpgrp2 (d_getpgrp2.U):
1036 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1037 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1038 is available to get the current process group.
1039
1040d_getpgrp (d_getpgrp.U):
1041 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1042 available to get the current process group.
1043
1044d_getppid (d_getppid.U):
1045 This variable conditionally defines the HAS_GETPPID symbol, which
1046 indicates to the C program that the getppid() routine is available
1047 to get the parent process ID.
1048
1049d_getprior (d_getprior.U):
1050 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1051 is available to get a process's priority.
1052
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1053d_getprotobyname_r (d_getprotobyname_r.U):
1054 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1055 which indicates to the C program that the getprotobyname_r()
1056 routine is available.
1057
1058d_getprotobynumber_r (d_getprotobynumber_r.U):
1059 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1060 which indicates to the C program that the getprotobynumber_r()
1061 routine is available.
1062
1063d_getprotoent_r (d_getprotoent_r.U):
1064 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1065 which indicates to the C program that the getprotoent_r()
1066 routine is available.
1067
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1068d_getprotoprotos (d_getprotoprotos.U):
1069 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1070 which indicates to the C program that <netdb.h> supplies
1071 prototypes for the various getproto*() functions.
1072 See also netdbtype.U for probing for various netdb types.
1073
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1074d_getprpwnam (d_getprpwnam.U):
1075 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1076 available to retrieve protected (shadow) password entries by name.
1077
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1078d_getpwent (d_getpwent.U):
1079 This variable conditionally defines the HAS_GETPWENT symbol, which
1080 indicates to the C program that the getpwent() routine is available
1081 for sequential access of the passwd database.
1082
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1083d_getpwent_r (d_getpwent_r.U):
1084 This variable conditionally defines the HAS_GETPWENT_R symbol,
1085 which indicates to the C program that the getpwent_r()
1086 routine is available.
1087
1088d_getpwnam_r (d_getpwnam_r.U):
1089 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1090 which indicates to the C program that the getpwnam_r()
1091 routine is available.
1092
1093d_getpwuid_r (d_getpwuid_r.U):
1094 This variable conditionally defines the HAS_GETPWUID_R symbol,
1095 which indicates to the C program that the getpwuid_r()
1096 routine is available.
1097
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1098d_getsbyname (d_getsrvby.U):
1099 This variable conditionally defines the HAS_GETSERVBYNAME
1100 symbol, which indicates to the C program that the
1101 getservbyname() routine is available to look up services
1102 by their name.
1103
1104d_getsbyport (d_getsrvby.U):
1105 This variable conditionally defines the HAS_GETSERVBYPORT
1106 symbol, which indicates to the C program that the
1107 getservbyport() routine is available to look up services
1108 by their port.
1109
1110d_getsent (d_getsent.U):
1111 This variable conditionally defines HAS_GETSERVENT if getservent() is
1112 available to look up network services in some data base or another.
1113
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1114d_getservbyname_r (d_getservbyname_r.U):
1115 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1116 which indicates to the C program that the getservbyname_r()
1117 routine is available.
1118
1119d_getservbyport_r (d_getservbyport_r.U):
1120 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1121 which indicates to the C program that the getservbyport_r()
1122 routine is available.
1123
1124d_getservent_r (d_getservent_r.U):
1125 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1126 which indicates to the C program that the getservent_r()
1127 routine is available.
1128
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1129d_getservprotos (d_getservprotos.U):
1130 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1131 which indicates to the C program that <netdb.h> supplies
1132 prototypes for the various getserv*() functions.
1133 See also netdbtype.U for probing for various netdb types.
1134
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JH
1135d_getspnam (d_getspnam.U):
1136 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1137 available to retrieve SysV shadow password entries by name.
1138
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JH
1139d_getspnam_r (d_getspnam_r.U):
1140 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1141 which indicates to the C program that the getspnam_r()
1142 routine is available.
1143
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JH
1144d_gettimeod (d_ftime.U):
1145 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1146 indicates that the gettimeofday() system call exists (to obtain a
1147 sub-second accuracy clock). You should probably include <sys/resource.h>.
1148
10bc17b6
JH
1149d_gmtime_r (d_gmtime_r.U):
1150 This variable conditionally defines the HAS_GMTIME_R symbol,
1151 which indicates to the C program that the gmtime_r()
1152 routine is available.
1153
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1154d_gnulibc (d_gnulibc.U):
1155 Defined if we're dealing with the GNU C Library.
1156
1157d_grpasswd (i_grp.U):
1158 This variable conditionally defines GRPASSWD, which indicates
1159 that struct group in <grp.h> contains gr_passwd.
1160
1161d_hasmntopt (d_hasmntopt.U):
1162 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1163 indicates to the C program that the hasmntopt() routine is available
1164 to query the mount options of file systems.
1165
1166d_htonl (d_htonl.U):
1167 This variable conditionally defines HAS_HTONL if htonl() and its
1168 friends are available to do network order byte swapping.
1169
5c567d7d
JH
1170d_ilogbl (d_ilogbl.U):
1171 This variable conditionally defines the HAS_ILOGBL symbol, which
1172 indicates to the C program that the ilogbl() routine is available.
1173 If scalbnl is also present we can emulate frexpl.
1174
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1175d_index (d_strchr.U):
1176 This variable conditionally defines HAS_INDEX if index() and
1177 rindex() are available for string searching.
1178
1179d_inetaton (d_inetaton.U):
1180 This variable conditionally defines the HAS_INET_ATON symbol, which
1181 indicates to the C program that the inet_aton() function is available
1182 to parse IP address "dotted-quad" strings.
1183
13b3f787 1184d_int64_t (d_int64_t.U):
781b178c
JH
1185 This symbol will be defined if the C compiler supports int64_t.
1186
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1187d_isascii (d_isascii.U):
1188 This variable conditionally defines the HAS_ISASCII constant,
1189 which indicates to the C program that isascii() is available.
1190
758a5d79
JH
1191d_isfinite (d_isfinite.U):
1192 This variable conditionally defines the HAS_ISFINITE symbol, which
1193 indicates to the C program that the isfinite() routine is available.
1194
1195d_isinf (d_isinf.U):
1196 This variable conditionally defines the HAS_ISINF symbol, which
1197 indicates to the C program that the isinf() routine is available.
1198
a3540c92
JH
1199d_isnan (d_isnan.U):
1200 This variable conditionally defines the HAS_ISNAN symbol, which
1201 indicates to the C program that the isnan() routine is available.
1202
1203d_isnanl (d_isnanl.U):
1204 This variable conditionally defines the HAS_ISNANL symbol, which
1205 indicates to the C program that the isnanl() routine is available.
1206
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1207d_killpg (d_killpg.U):
1208 This variable conditionally defines the HAS_KILLPG symbol, which
1209 indicates to the C program that the killpg() routine is available
1210 to kill process groups.
1211
1212d_lchown (d_lchown.U):
1213 This variable conditionally defines the HAS_LCHOWN symbol, which
1214 indicates to the C program that the lchown() routine is available
1215 to operate on a symbolic link (instead of following the link).
1216
ca24dfc6
LV
1217d_ldbl_dig (d_ldbl_dig.U):
1218 This variable conditionally defines d_ldbl_dig if this system's
1219 header files provide LDBL_DIG, which is the number of significant
1220 digits in a long double precision number.
1221
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1222d_link (d_link.U):
1223 This variable conditionally defines HAS_LINK if link() is
1224 available to create hard links.
1225
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1226d_localtime_r (d_localtime_r.U):
1227 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1228 which indicates to the C program that the localtime_r()
1229 routine is available.
1230
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JH
1231d_locconv (d_locconv.U):
1232 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1233 available for numeric and monetary formatting conventions.
1234
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1235d_lockf (d_lockf.U):
1236 This variable conditionally defines HAS_LOCKF if lockf() is
1237 available to do file locking.
1238
1239d_longdbl (d_longdbl.U):
1240 This variable conditionally defines HAS_LONG_DOUBLE if
1241 the long double type is supported.
1242
1243d_longlong (d_longlong.U):
1244 This variable conditionally defines HAS_LONG_LONG if
1245 the long long type is supported.
1246
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JH
1247d_lseekproto (d_lseekproto.U):
1248 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1249 which indicates to the C program that the system provides
1250 a prototype for the lseek() function. Otherwise, it is
1251 up to the program to supply one.
1252
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JH
1253d_lstat (d_lstat.U):
1254 This variable conditionally defines HAS_LSTAT if lstat() is
1255 available to do file stats on symbolic links.
1256
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JH
1257d_madvise (d_madvise.U):
1258 This variable conditionally defines HAS_MADVISE if madvise() is
1259 available to map a file into memory.
1260
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1261d_mblen (d_mblen.U):
1262 This variable conditionally defines the HAS_MBLEN symbol, which
1263 indicates to the C program that the mblen() routine is available
1264 to find the number of bytes in a multibye character.
1265
1266d_mbstowcs (d_mbstowcs.U):
1267 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1268 indicates to the C program that the mbstowcs() routine is available
1269 to convert a multibyte string into a wide character string.
1270
1271d_mbtowc (d_mbtowc.U):
1272 This variable conditionally defines the HAS_MBTOWC symbol, which
1273 indicates to the C program that the mbtowc() routine is available
1274 to convert multibyte to a wide character.
1275
1276d_memchr (d_memchr.U):
1277 This variable conditionally defines the HAS_MEMCHR symbol, which
1278 indicates to the C program that the memchr() routine is available
1279 to locate characters within a C string.
1280
1281d_memcmp (d_memcmp.U):
1282 This variable conditionally defines the HAS_MEMCMP symbol, which
1283 indicates to the C program that the memcmp() routine is available
1284 to compare blocks of memory.
1285
1286d_memcpy (d_memcpy.U):
1287 This variable conditionally defines the HAS_MEMCPY symbol, which
1288 indicates to the C program that the memcpy() routine is available
1289 to copy blocks of memory.
1290
1291d_memmove (d_memmove.U):
1292 This variable conditionally defines the HAS_MEMMOVE symbol, which
1293 indicates to the C program that the memmove() routine is available
1294 to copy potentatially overlapping blocks of memory.
1295
1296d_memset (d_memset.U):
1297 This variable conditionally defines the HAS_MEMSET symbol, which
1298 indicates to the C program that the memset() routine is available
1299 to set blocks of memory.
1300
1301d_mkdir (d_mkdir.U):
1302 This variable conditionally defines the HAS_MKDIR symbol, which
1303 indicates to the C program that the mkdir() routine is available
209e5c0a 1304 to create directories..
781b178c 1305
fe749a9f
JH
1306d_mkdtemp (d_mkdtemp.U):
1307 This variable conditionally defines the HAS_MKDTEMP symbol, which
1308 indicates to the C program that the mkdtemp() routine is available
1309 to exclusively create a uniquely named temporary directory.
1310
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JH
1311d_mkfifo (d_mkfifo.U):
1312 This variable conditionally defines the HAS_MKFIFO symbol, which
1313 indicates to the C program that the mkfifo() routine is available.
1314
fe749a9f
JH
1315d_mkstemp (d_mkstemp.U):
1316 This variable conditionally defines the HAS_MKSTEMP symbol, which
1317 indicates to the C program that the mkstemp() routine is available
1318 to exclusively create and open a uniquely named temporary file.
1319
1320d_mkstemps (d_mkstemps.U):
1321 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1322 indicates to the C program that the mkstemps() routine is available
1323 to exclusively create and open a uniquely named (with a suffix)
1324 temporary file.
1325
781b178c
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1326d_mktime (d_mktime.U):
1327 This variable conditionally defines the HAS_MKTIME symbol, which
1328 indicates to the C program that the mktime() routine is available.
1329
fe749a9f
JH
1330d_mmap (d_mmap.U):
1331 This variable conditionally defines HAS_MMAP if mmap() is
1332 available to map a file into memory.
1333
a3540c92
JH
1334d_modfl (d_modfl.U):
1335 This variable conditionally defines the HAS_MODFL symbol, which
1336 indicates to the C program that the modfl() routine is available.
1337
e67aeab1
JH
1338d_modfl_pow32_bug (d_modfl.U):
1339 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1340 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1341 For example from 4294967303.150000 one would get 4294967302.000000
1342 and 1.150000. The bug has been seen in certain versions of glibc,
1343 release 2.2.2 is known to be okay.
1344
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MB
1345d_modflproto (d_modfl.U):
1346 This symbol, if defined, indicates that the system provides
1347 a prototype for the modfl() function. Otherwise, it is up
1348 to the program to supply one. C99 says it should be
1349 long double modfl(long double, long double *);
1350
fe749a9f
JH
1351d_mprotect (d_mprotect.U):
1352 This variable conditionally defines HAS_MPROTECT if mprotect() is
1353 available to modify the access protection of a memory mapped file.
1354
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JH
1355d_msg (d_msg.U):
1356 This variable conditionally defines the HAS_MSG symbol, which
1357 indicates that the entire msg*(2) library is present.
1358
1359d_msg_ctrunc (d_socket.U):
1360 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1361 which indicates that the MSG_CTRUNC is available. #ifdef is
1362 not enough because it may be an enum, glibc has been known to do this.
1363
1364d_msg_dontroute (d_socket.U):
1365 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1366 which indicates that the MSG_DONTROUTE is available. #ifdef is
1367 not enough because it may be an enum, glibc has been known to do this.
1368
1369d_msg_oob (d_socket.U):
1370 This variable conditionally defines the HAS_MSG_OOB symbol,
1371 which indicates that the MSG_OOB is available. #ifdef is
1372 not enough because it may be an enum, glibc has been known to do this.
1373
1374d_msg_peek (d_socket.U):
1375 This variable conditionally defines the HAS_MSG_PEEK symbol,
1376 which indicates that the MSG_PEEK is available. #ifdef is
1377 not enough because it may be an enum, glibc has been known to do this.
1378
1379d_msg_proxy (d_socket.U):
1380 This variable conditionally defines the HAS_MSG_PROXY symbol,
1381 which indicates that the MSG_PROXY is available. #ifdef is
1382 not enough because it may be an enum, glibc has been known to do this.
1383
1384d_msgctl (d_msgctl.U):
1385 This variable conditionally defines the HAS_MSGCTL symbol, which
1386 indicates to the C program that the msgctl() routine is available.
1387
1388d_msgget (d_msgget.U):
1389 This variable conditionally defines the HAS_MSGGET symbol, which
1390 indicates to the C program that the msgget() routine is available.
1391
4e0554ec
JH
1392d_msghdr_s (d_msghdr_s.U):
1393 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1394 which indicates that the struct msghdr is supported.
1395
781b178c
JH
1396d_msgrcv (d_msgrcv.U):
1397 This variable conditionally defines the HAS_MSGRCV symbol, which
1398 indicates to the C program that the msgrcv() routine is available.
1399
1400d_msgsnd (d_msgsnd.U):
1401 This variable conditionally defines the HAS_MSGSND symbol, which
1402 indicates to the C program that the msgsnd() routine is available.
1403
fe749a9f
JH
1404d_msync (d_msync.U):
1405 This variable conditionally defines HAS_MSYNC if msync() is
1406 available to synchronize a mapped file.
1407
1408d_munmap (d_munmap.U):
1409 This variable conditionally defines HAS_MUNMAP if munmap() is
1410 available to unmap a region mapped by mmap().
1411
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JH
1412d_mymalloc (mallocsrc.U):
1413 This variable conditionally defines MYMALLOC in case other parts
1414 of the source want to take special action if MYMALLOC is used.
1415 This may include different sorts of profiling or error detection.
1416
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MB
1417d_nanosleep (d_nanosleep.U):
1418 This variable conditionally defines HAS_NANOSLEEP
1419 if nanosleep() is available to sleep with 1E-9 sec accuracy.
1420
781b178c
JH
1421d_nice (d_nice.U):
1422 This variable conditionally defines the HAS_NICE symbol, which
1423 indicates to the C program that the nice() routine is available.
1424
2765b840
JH
1425d_nl_langinfo (d_nl_langinfo.U):
1426 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1427 indicates to the C program that the nl_langinfo() routine is available.
1428
78691af5 1429d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1430 This variable indicates whether a variable of type nvtype
1431 can preserve all the bits a variable of type uvtype.
1432
c890dc6c 1433d_off64_t (d_off64_t.U):
781b178c
JH
1434 This symbol will be defined if the C compiler supports off64_t.
1435
781b178c
JH
1436d_old_pthread_create_joinable (d_pthrattrj.U):
1437 This variable conditionally defines pthread_create_joinable.
1438 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1439
1440d_oldpthreads (usethreads.U):
1441 This variable conditionally defines the OLD_PTHREADS_API symbol,
1442 and indicates that Perl should be built to use the old
8c09e4ca 1443 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1444 usethreads is set.
1445
1446d_oldsock (d_socket.U):
1447 This variable conditionally defines the OLDSOCKET symbol, which
1448 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1449
1450d_open3 (d_open3.U):
1451 This variable conditionally defines the HAS_OPEN3 manifest constant,
1452 which indicates to the C program that the 3 argument version of
1453 the open(2) function is available.
1454
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JH
1455d_pathconf (d_pathconf.U):
1456 This variable conditionally defines the HAS_PATHCONF symbol, which
1457 indicates to the C program that the pathconf() routine is available
1458 to determine file-system related limits and options associated
1459 with a given filename.
1460
1461d_pause (d_pause.U):
1462 This variable conditionally defines the HAS_PAUSE symbol, which
1463 indicates to the C program that the pause() routine is available
1464 to suspend a process until a signal is received.
1465
3b777bb4
GS
1466d_perl_otherlibdirs (otherlibdirs.U):
1467 This variable conditionally defines PERL_OTHERLIBDIRS, which
1468 contains a colon-separated set of paths for the perl binary to
1469 include in @INC. See also otherlibdirs.
1470
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JH
1471d_phostname (d_gethname.U):
1472 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1473 contains the shell command which, when fed to popen(), may be
1474 used to derive the host name.
1475
1476d_pipe (d_pipe.U):
1477 This variable conditionally defines the HAS_PIPE symbol, which
1478 indicates to the C program that the pipe() routine is available
1479 to create an inter-process channel.
1480
1481d_poll (d_poll.U):
1482 This variable conditionally defines the HAS_POLL symbol, which
1483 indicates to the C program that the poll() routine is available
1484 to poll active file descriptors.
1485
1486d_portable (d_portable.U):
1487 This variable conditionally defines the PORTABLE symbol, which
1488 indicates to the C program that it should not assume that it is
1489 running on the machine it was compiled on.
1490
428dc699
JH
1491d_procselfexe (d_procselfexe.U):
1492 Defined if $procselfexe is symlink to the absolute
1493 pathname of the executing program.
1494
d6483fcc
JH
1495d_pthread_atfork (d_pthread_atfork.U):
1496 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1497 which indicates to the C program that the pthread_atfork()
1498 routine is available.
1499
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1500d_pthread_yield (d_pthread_y.U):
1501 This variable conditionally defines the HAS_PTHREAD_YIELD
1502 symbol if the pthread_yield routine is available to yield
1503 the execution of the current thread.
1504
1505d_pwage (i_pwd.U):
1506 This variable conditionally defines PWAGE, which indicates
1507 that struct passwd contains pw_age.
1508
1509d_pwchange (i_pwd.U):
1510 This variable conditionally defines PWCHANGE, which indicates
1511 that struct passwd contains pw_change.
1512
1513d_pwclass (i_pwd.U):
1514 This variable conditionally defines PWCLASS, which indicates
1515 that struct passwd contains pw_class.
1516
1517d_pwcomment (i_pwd.U):
1518 This variable conditionally defines PWCOMMENT, which indicates
1519 that struct passwd contains pw_comment.
1520
1521d_pwexpire (i_pwd.U):
1522 This variable conditionally defines PWEXPIRE, which indicates
1523 that struct passwd contains pw_expire.
1524
1525d_pwgecos (i_pwd.U):
1526 This variable conditionally defines PWGECOS, which indicates
1527 that struct passwd contains pw_gecos.
1528
1529d_pwpasswd (i_pwd.U):
1530 This variable conditionally defines PWPASSWD, which indicates
1531 that struct passwd contains pw_passwd.
1532
1533d_pwquota (i_pwd.U):
1534 This variable conditionally defines PWQUOTA, which indicates
1535 that struct passwd contains pw_quota.
1536
792d8dab
JH
1537d_qgcvt (d_qgcvt.U):
1538 This variable conditionally defines the HAS_QGCVT symbol, which
1539 indicates to the C program that the qgcvt() routine is available.
1540
de1c2614
JH
1541d_quad (quadtype.U):
1542 This variable, if defined, tells that there's a 64-bit integer type,
1543 quadtype.
1544
10bc17b6
JH
1545d_random_r (d_random_r.U):
1546 This variable conditionally defines the HAS_RANDOM_R symbol,
1547 which indicates to the C program that the random_r()
1548 routine is available.
1549
1550d_readdir64_r (d_readdir64_r.U):
1551 This variable conditionally defines the HAS_READDIR64_R symbol,
1552 which indicates to the C program that the readdir64_r()
1553 routine is available.
1554
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JH
1555d_readdir (d_readdir.U):
1556 This variable conditionally defines HAS_READDIR if readdir() is
1557 available to read directory entries.
1558
10bc17b6
JH
1559d_readdir_r (d_readdir_r.U):
1560 This variable conditionally defines the HAS_READDIR_R symbol,
1561 which indicates to the C program that the readdir_r()
1562 routine is available.
1563
781b178c
JH
1564d_readlink (d_readlink.U):
1565 This variable conditionally defines the HAS_READLINK symbol, which
1566 indicates to the C program that the readlink() routine is available
1567 to read the value of a symbolic link.
1568
4e0554ec
JH
1569d_readv (d_readv.U):
1570 This variable conditionally defines the HAS_READV symbol, which
1571 indicates to the C program that the readv() routine is available.
1572
1573d_recvmsg (d_recvmsg.U):
1574 This variable conditionally defines the HAS_RECVMSG symbol, which
1575 indicates to the C program that the recvmsg() routine is available.
1576
781b178c
JH
1577d_rename (d_rename.U):
1578 This variable conditionally defines the HAS_RENAME symbol, which
1579 indicates to the C program that the rename() routine is available
1580 to rename files.
1581
1582d_rewinddir (d_readdir.U):
1583 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1584 available.
1585
1586d_rmdir (d_rmdir.U):
1587 This variable conditionally defines HAS_RMDIR if rmdir() is
1588 available to remove directories.
1589
1590d_safebcpy (d_safebcpy.U):
1591 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1592 the bcopy() routine can do overlapping copies. Normally, you
1593 should probably use memmove().
781b178c
JH
1594
1595d_safemcpy (d_safemcpy.U):
1596 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1597 the memcpy() routine can do overlapping copies.
b6cc3bc4 1598 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1599
1600d_sanemcmp (d_sanemcmp.U):
1601 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1602 the memcpy() routine is available and can be used to compare relative
1603 magnitudes of chars with their high bits set.
1604
ef9f17be
JH
1605d_sbrkproto (d_sbrkproto.U):
1606 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1607 which indicates to the C program that the system provides
1608 a prototype for the sbrk() function. Otherwise, it is
1609 up to the program to supply one.
1610
5c567d7d
JH
1611d_scalbnl (d_scalbnl.U):
1612 This variable conditionally defines the HAS_SCALBNL symbol, which
1613 indicates to the C program that the scalbnl() routine is available.
1614 If ilogbl is also present we can emulate frexpl.
1615
781b178c
JH
1616d_sched_yield (d_pthread_y.U):
1617 This variable conditionally defines the HAS_SCHED_YIELD
1618 symbol if the sched_yield routine is available to yield
1619 the execution of the current thread.
1620
1621d_scm_rights (d_socket.U):
1622 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1623 which indicates that the SCM_RIGHTS is available. #ifdef is
1624 not enough because it may be an enum, glibc has been known to do this.
1625
781b178c
JH
1626d_seekdir (d_readdir.U):
1627 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1628 available.
1629
1630d_select (d_select.U):
1631 This variable conditionally defines HAS_SELECT if select() is
1632 available to select active file descriptors. A <sys/time.h>
1633 inclusion may be necessary for the timeout field.
1634
1635d_sem (d_sem.U):
1636 This variable conditionally defines the HAS_SEM symbol, which
1637 indicates that the entire sem*(2) library is present.
1638
1639d_semctl (d_semctl.U):
1640 This variable conditionally defines the HAS_SEMCTL symbol, which
1641 indicates to the C program that the semctl() routine is available.
1642
1643d_semctl_semid_ds (d_union_semun.U):
1644 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1645 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1646
1647d_semctl_semun (d_union_semun.U):
1648 This variable conditionally defines USE_SEMCTL_SEMUN, which
1649 indicates that union semun is to be used for semctl IPC_STAT.
1650
1651d_semget (d_semget.U):
1652 This variable conditionally defines the HAS_SEMGET symbol, which
1653 indicates to the C program that the semget() routine is available.
1654
1655d_semop (d_semop.U):
1656 This variable conditionally defines the HAS_SEMOP symbol, which
1657 indicates to the C program that the semop() routine is available.
1658
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1659d_sendmsg (d_sendmsg.U):
1660 This variable conditionally defines the HAS_SENDMSG symbol, which
1661 indicates to the C program that the sendmsg() routine is available.
1662
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1663d_setegid (d_setegid.U):
1664 This variable conditionally defines the HAS_SETEGID symbol, which
1665 indicates to the C program that the setegid() routine is available
1666 to change the effective gid of the current program.
1667
1668d_seteuid (d_seteuid.U):
1669 This variable conditionally defines the HAS_SETEUID symbol, which
1670 indicates to the C program that the seteuid() routine is available
1671 to change the effective uid of the current program.
1672
1673d_setgrent (d_setgrent.U):
1674 This variable conditionally defines the HAS_SETGRENT symbol, which
1675 indicates to the C program that the setgrent() routine is available
1676 for initializing sequential access to the group database.
1677
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1678d_setgrent_r (d_setgrent_r.U):
1679 This variable conditionally defines the HAS_SETGRENT_R symbol,
1680 which indicates to the C program that the setgrent_r()
1681 routine is available.
1682
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1683d_setgrps (d_setgrps.U):
1684 This variable conditionally defines the HAS_SETGROUPS symbol, which
1685 indicates to the C program that the setgroups() routine is available
1686 to set the list of process groups.
1687
1688d_sethent (d_sethent.U):
1689 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1690 available.
1691
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1692d_sethostent_r (d_sethostent_r.U):
1693 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
1694 which indicates to the C program that the sethostent_r()
1695 routine is available.
1696
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1697d_setitimer (d_setitimer.U):
1698 This variable conditionally defines the HAS_SETITIMER symbol, which
1699 indicates to the C program that the setitimer() routine is available.
1700
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1701d_setlinebuf (d_setlnbuf.U):
1702 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1703 indicates to the C program that the setlinebuf() routine is available
1704 to change stderr or stdout from block-buffered or unbuffered to a
1705 line-buffered mode.
1706
1707d_setlocale (d_setlocale.U):
1708 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1709 available to handle locale-specific ctype implementations.
1710
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1711d_setlocale_r (d_setlocale_r.U):
1712 This variable conditionally defines the HAS_SETLOCALE_R symbol,
1713 which indicates to the C program that the setlocale_r()
1714 routine is available.
1715
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1716d_setnent (d_setnent.U):
1717 This variable conditionally defines HAS_SETNETENT if setnetent() is
1718 available.
1719
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1720d_setnetent_r (d_setnetent_r.U):
1721 This variable conditionally defines the HAS_SETNETENT_R symbol,
1722 which indicates to the C program that the setnetent_r()
1723 routine is available.
1724
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1725d_setpent (d_setpent.U):
1726 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1727 available.
1728
1729d_setpgid (d_setpgid.U):
1730 This variable conditionally defines the HAS_SETPGID symbol if the
1731 setpgid(pid, gpid) function is available to set process group ID.
1732
1733d_setpgrp2 (d_setpgrp2.U):
1734 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1735 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1736 is available to set the current process group.
1737
1738d_setpgrp (d_setpgrp.U):
1739 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1740 available to set the current process group.
1741
1742d_setprior (d_setprior.U):
1743 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1744 is available to set a process's priority.
1745
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1746d_setproctitle (d_setproctitle.U):
1747 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1748 which indicates to the C program that the setproctitle() routine
1749 is available.
1750
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1751d_setprotoent_r (d_setprotoent_r.U):
1752 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
1753 which indicates to the C program that the setprotoent_r()
1754 routine is available.
1755
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1756d_setpwent (d_setpwent.U):
1757 This variable conditionally defines the HAS_SETPWENT symbol, which
1758 indicates to the C program that the setpwent() routine is available
1759 for initializing sequential access to the passwd database.
1760
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1761d_setpwent_r (d_setpwent_r.U):
1762 This variable conditionally defines the HAS_SETPWENT_R symbol,
1763 which indicates to the C program that the setpwent_r()
1764 routine is available.
1765
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1766d_setregid (d_setregid.U):
1767 This variable conditionally defines HAS_SETREGID if setregid() is
1768 available to change the real and effective gid of the current
1769 process.
1770
1771d_setresgid (d_setregid.U):
1772 This variable conditionally defines HAS_SETRESGID if setresgid() is
1773 available to change the real, effective and saved gid of the current
1774 process.
1775
1776d_setresuid (d_setreuid.U):
1777 This variable conditionally defines HAS_SETREUID if setresuid() is
1778 available to change the real, effective and saved uid of the current
1779 process.
1780
1781d_setreuid (d_setreuid.U):
1782 This variable conditionally defines HAS_SETREUID if setreuid() is
1783 available to change the real and effective uid of the current
1784 process.
1785
1786d_setrgid (d_setrgid.U):
1787 This variable conditionally defines the HAS_SETRGID symbol, which
1788 indicates to the C program that the setrgid() routine is available
1789 to change the real gid of the current program.
1790
1791d_setruid (d_setruid.U):
1792 This variable conditionally defines the HAS_SETRUID symbol, which
1793 indicates to the C program that the setruid() routine is available
1794 to change the real uid of the current program.
1795
1796d_setsent (d_setsent.U):
1797 This variable conditionally defines HAS_SETSERVENT if setservent() is
1798 available.
1799
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1800d_setservent_r (d_setservent_r.U):
1801 This variable conditionally defines the HAS_SETSERVENT_R symbol,
1802 which indicates to the C program that the setservent_r()
1803 routine is available.
1804
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1805d_setsid (d_setsid.U):
1806 This variable conditionally defines HAS_SETSID if setsid() is
1807 available to set the process group ID.
1808
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1809d_setvbuf (d_setvbuf.U):
1810 This variable conditionally defines the HAS_SETVBUF symbol, which
1811 indicates to the C program that the setvbuf() routine is available
1812 to change buffering on an open stdio stream.
1813
1814d_sfio (d_sfio.U):
1815 This variable conditionally defines the USE_SFIO symbol,
1816 and indicates whether sfio is available (and should be used).
1817
1818d_shm (d_shm.U):
1819 This variable conditionally defines the HAS_SHM symbol, which
1820 indicates that the entire shm*(2) library is present.
1821
1822d_shmat (d_shmat.U):
1823 This variable conditionally defines the HAS_SHMAT symbol, which
1824 indicates to the C program that the shmat() routine is available.
1825
1826d_shmatprototype (d_shmat.U):
1827 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1828 symbol, which indicates that sys/shm.h has a prototype for
1829 shmat.
1830
1831d_shmctl (d_shmctl.U):
1832 This variable conditionally defines the HAS_SHMCTL symbol, which
1833 indicates to the C program that the shmctl() routine is available.
1834
1835d_shmdt (d_shmdt.U):
1836 This variable conditionally defines the HAS_SHMDT symbol, which
1837 indicates to the C program that the shmdt() routine is available.
1838
1839d_shmget (d_shmget.U):
1840 This variable conditionally defines the HAS_SHMGET symbol, which
1841 indicates to the C program that the shmget() routine is available.
1842
1843d_sigaction (d_sigaction.U):
1844 This variable conditionally defines the HAS_SIGACTION symbol, which
1845 indicates that the Vr4 sigaction() routine is available.
1846
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1847d_sigprocmask (d_sigprocmask.U):
1848 This variable conditionally defines HAS_SIGPROCMASK
1849 if sigprocmask() is available to examine or change the signal mask
1850 of the calling process.
1851
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1852d_sigsetjmp (d_sigsetjmp.U):
1853 This variable conditionally defines the HAS_SIGSETJMP symbol,
1854 which indicates that the sigsetjmp() routine is available to
1855 call setjmp() and optionally save the process's signal mask.
1856
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1857d_sockatmark (d_sockatmark.U):
1858 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1859 indicates to the C program that the sockatmark() routine is available.
1860
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1861d_sockatmarkproto (d_sockatmarkproto.U):
1862 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1863 which indicates to the C program that the system provides
1864 a prototype for the sockatmark() function. Otherwise, it is
1865 up to the program to supply one.
1866
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1867d_socket (d_socket.U):
1868 This variable conditionally defines HAS_SOCKET, which indicates
1869 that the BSD socket interface is supported.
1870
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JH
1871d_socklen_t (d_socklen_t.U):
1872 This symbol will be defined if the C compiler supports socklen_t.
1873
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1874d_sockpair (d_socket.U):
1875 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1876 indicates that the BSD socketpair() is supported.
1877
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1878d_socks5_init (d_socks5_init.U):
1879 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1880 indicates to the C program that the socks5_init() routine is available.
1881
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1882d_sqrtl (d_sqrtl.U):
1883 This variable conditionally defines the HAS_SQRTL symbol, which
1884 indicates to the C program that the sqrtl() routine is available.
1885
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1886d_srand48_r (d_srand48_r.U):
1887 This variable conditionally defines the HAS_SRAND48_R symbol,
1888 which indicates to the C program that the srand48_r()
1889 routine is available.
1890
1891d_srandom_r (d_srandom_r.U):
1892 This variable conditionally defines the HAS_SRANDOM_R symbol,
1893 which indicates to the C program that the srandom_r()
1894 routine is available.
1895
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1896d_sresgproto (d_sresgproto.U):
1897 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1898 which indicates to the C program that the system provides
1899 a prototype for the setresgid() function. Otherwise, it is
1900 up to the program to supply one.
1901
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1902d_sresuproto (d_sresuproto.U):
1903 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1904 which indicates to the C program that the system provides
1905 a prototype for the setresuid() function. Otherwise, it is
1906 up to the program to supply one.
1907
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1908d_statblks (d_statblks.U):
1909 This variable conditionally defines USE_STAT_BLOCKS
1910 if this system has a stat structure declaring
1911 st_blksize and st_blocks.
1912
ad27e871 1913d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1914 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
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1915 symbol, which indicates to struct statfs from has f_flags member.
1916 This kind of struct statfs is coming from sys/mount.h (BSD),
1917 not from sys/statfs.h (SYSV).
1918
ad27e871 1919d_statfs_s (d_statfs_s.U):
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1920 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1921 which indicates that the struct statfs is supported.
1922
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1923d_statvfs (d_statvfs.U):
1924 This variable conditionally defines the HAS_STATVFS symbol, which
1925 indicates to the C program that the statvfs() routine is available.
1926
1927d_stdio_cnt_lval (d_stdstdio.U):
1928 This variable conditionally defines STDIO_CNT_LVALUE if the
1929 FILE_cnt macro can be used as an lvalue.
1930
1931d_stdio_ptr_lval (d_stdstdio.U):
1932 This variable conditionally defines STDIO_PTR_LVALUE if the
1933 FILE_ptr macro can be used as an lvalue.
1934
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NC
1935d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1936 This symbol is defined if using the FILE_ptr macro as an lvalue
1937 to increase the pointer by n leaves File_cnt(fp) unchanged.
1938
1939d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1940 This symbol is defined if using the FILE_ptr macro as an lvalue
1941 to increase the pointer by n has the side effect of decreasing the
1942 value of File_cnt(fp) by n.
1943
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1944d_stdio_stream_array (stdio_streams.U):
1945 This variable tells whether there is an array holding
1946 the stdio streams.
1947
1948d_stdiobase (d_stdstdio.U):
1949 This variable conditionally defines USE_STDIO_BASE if this system
1950 has a FILE structure declaring a usable _base field (or equivalent)
1951 in stdio.h.
1952
1953d_stdstdio (d_stdstdio.U):
1954 This variable conditionally defines USE_STDIO_PTR if this system
1955 has a FILE structure declaring usable _ptr and _cnt fields (or
1956 equivalent) in stdio.h.
1957
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1958d_strchr (d_strchr.U):
1959 This variable conditionally defines HAS_STRCHR if strchr() and
1960 strrchr() are available for string searching.
1961
1962d_strcoll (d_strcoll.U):
1963 This variable conditionally defines HAS_STRCOLL if strcoll() is
1964 available to compare strings using collating information.
1965
1966d_strctcpy (d_strctcpy.U):
1967 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1968 indicates to the C program that this C compiler knows how to copy
1969 structures.
1970
1971d_strerrm (d_strerror.U):
1972 This variable holds what Strerrr is defined as to translate an error
1973 code condition into an error message string. It could be 'strerror'
1974 or a more complex macro emulating strrror with sys_errlist[], or the
1975 "unknown" string when both strerror and sys_errlist are missing.
1976
1977d_strerror (d_strerror.U):
1978 This variable conditionally defines HAS_STRERROR if strerror() is
1979 available to translate error numbers to strings.
1980
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1981d_strerror_r (d_strerror_r.U):
1982 This variable conditionally defines the HAS_STRERROR_R symbol,
1983 which indicates to the C program that the strerror_r()
1984 routine is available.
1985
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1986d_strftime (d_strftime.U):
1987 This variable conditionally defines the HAS_STRFTIME symbol, which
1988 indicates to the C program that the strftime() routine is available.
1989
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1990d_strtod (d_strtod.U):
1991 This variable conditionally defines the HAS_STRTOD symbol, which
1992 indicates to the C program that the strtod() routine is available
1993 to provide better numeric string conversion than atof().
1994
1995d_strtol (d_strtol.U):
1996 This variable conditionally defines the HAS_STRTOL symbol, which
1997 indicates to the C program that the strtol() routine is available
1998 to provide better numeric string conversion than atoi() and friends.
1999
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2000d_strtold (d_strtold.U):
2001 This variable conditionally defines the HAS_STRTOLD symbol, which
2002 indicates to the C program that the strtold() routine is available.
2003
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2004d_strtoll (d_strtoll.U):
2005 This variable conditionally defines the HAS_STRTOLL symbol, which
2006 indicates to the C program that the strtoll() routine is available.
2007
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NC
2008d_strtoq (d_strtoq.U):
2009 This variable conditionally defines the HAS_STRTOQ symbol, which
2010 indicates to the C program that the strtoq() routine is available.
2011
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2012d_strtoul (d_strtoul.U):
2013 This variable conditionally defines the HAS_STRTOUL symbol, which
2014 indicates to the C program that the strtoul() routine is available
2015 to provide conversion of strings to unsigned long.
2016
ff935051 2017d_strtoull (d_strtoull.U):
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2018 This variable conditionally defines the HAS_STRTOULL symbol, which
2019 indicates to the C program that the strtoull() routine is available.
2020
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2021d_strtouq (d_strtouq.U):
2022 This variable conditionally defines the HAS_STRTOUQ symbol, which
2023 indicates to the C program that the strtouq() routine is available.
2024
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2025d_strxfrm (d_strxfrm.U):
2026 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2027 available to transform strings.
2028
2029d_suidsafe (d_dosuid.U):
2030 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2031 if setuid scripts can be secure. This test looks in /dev/fd/.
2032
2033d_symlink (d_symlink.U):
2034 This variable conditionally defines the HAS_SYMLINK symbol, which
2035 indicates to the C program that the symlink() routine is available
2036 to create symbolic links.
2037
2038d_syscall (d_syscall.U):
2039 This variable conditionally defines HAS_SYSCALL if syscall() is
2040 available call arbitrary system calls.
2041
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2042d_syscallproto (d_syscallproto.U):
2043 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2044 which indicates to the C program that the system provides
2045 a prototype for the syscall() function. Otherwise, it is
2046 up to the program to supply one.
2047
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2048d_sysconf (d_sysconf.U):
2049 This variable conditionally defines the HAS_SYSCONF symbol, which
2050 indicates to the C program that the sysconf() routine is available
2051 to determine system related limits and options.
2052
2053d_sysernlst (d_strerror.U):
2054 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2055 is available to translate error numbers to the symbolic name.
2056
2057d_syserrlst (d_strerror.U):
2058 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2059 available to translate error numbers to strings.
2060
2061d_system (d_system.U):
2062 This variable conditionally defines HAS_SYSTEM if system() is
2063 available to issue a shell command.
2064
2065d_tcgetpgrp (d_tcgtpgrp.U):
2066 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2067 indicates to the C program that the tcgetpgrp() routine is available.
2068 to get foreground process group ID.
2069
2070d_tcsetpgrp (d_tcstpgrp.U):
2071 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2072 indicates to the C program that the tcsetpgrp() routine is available
2073 to set foreground process group ID.
2074
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2075d_telldir (d_readdir.U):
2076 This variable conditionally defines HAS_TELLDIR if telldir() is
2077 available.
2078
2079d_telldirproto (d_telldirproto.U):
2080 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2081 which indicates to the C program that the system provides
2082 a prototype for the telldir() function. Otherwise, it is
2083 up to the program to supply one.
2084
2085d_time (d_time.U):
2086 This variable conditionally defines the HAS_TIME symbol, which indicates
2087 that the time() routine exists. The time() routine is normaly
2088 provided on UNIX systems.
2089
2090d_times (d_times.U):
2091 This variable conditionally defines the HAS_TIMES symbol, which indicates
2092 that the times() routine exists. The times() routine is normaly
2093 provided on UNIX systems. You may have to include <sys/times.h>.
2094
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2095d_tm_tm_gmtoff (i_time.U):
2096 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2097 indicates to the C program that the struct tm has the tm_gmtoff field.
2098
2099d_tm_tm_zone (i_time.U):
2100 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2101 indicates to the C program that the struct tm has the tm_zone field.
2102
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2103d_tmpnam_r (d_tmpnam_r.U):
2104 This variable conditionally defines the HAS_TMPNAM_R symbol,
2105 which indicates to the C program that the tmpnam_r()
2106 routine is available.
2107
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2108d_truncate (d_truncate.U):
2109 This variable conditionally defines HAS_TRUNCATE if truncate() is
2110 available to truncate files.
2111
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2112d_ttyname_r (d_ttyname_r.U):
2113 This variable conditionally defines the HAS_TTYNAME_R symbol,
2114 which indicates to the C program that the ttyname_r()
2115 routine is available.
2116
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2117d_tzname (d_tzname.U):
2118 This variable conditionally defines HAS_TZNAME if tzname[] is
2119 available to access timezone names.
2120
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2121d_u32align (d_u32align.U):
2122 This variable tells whether you must access character data
2123 through U32-aligned pointers.
2124
2125d_ualarm (d_ualarm.U):
2126 This variable conditionally defines the HAS_UALARM symbol, which
2127 indicates to the C program that the ualarm() routine is available.
2128
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2129d_umask (d_umask.U):
2130 This variable conditionally defines the HAS_UMASK symbol, which
2131 indicates to the C program that the umask() routine is available.
2132 to set and get the value of the file creation mask.
2133
2134d_uname (d_gethname.U):
2135 This variable conditionally defines the HAS_UNAME symbol, which
2136 indicates to the C program that the uname() routine may be
2137 used to derive the host name.
2138
2139d_union_semun (d_union_semun.U):
2140 This variable conditionally defines HAS_UNION_SEMUN if the
2141 union semun is defined by including <sys/sem.h>.
2142
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2143d_unordered (d_unordered.U):
2144 This variable conditionally defines the HAS_UNORDERED symbol, which
2145 indicates to the C program that the unordered() routine is available.
2146
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2147d_usleep (d_usleep.U):
2148 This variable conditionally defines HAS_USLEEP if usleep() is
2149 available to do high granularity sleeps.
2150
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2151d_usleepproto (d_usleepproto.U):
2152 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2153 which indicates to the C program that the system provides
2154 a prototype for the usleep() function. Otherwise, it is
2155 up to the program to supply one.
2156
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2157d_ustat (d_ustat.U):
2158 This variable conditionally defines HAS_USTAT if ustat() is
2159 available to query file system statistics by dev_t.
2160
526fdc24
MS
2161d_vendorarch (vendorarch.U):
2162 This variable conditionally defined PERL_VENDORARCH.
2163
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2164d_vendorbin (vendorbin.U):
2165 This variable conditionally defines PERL_VENDORBIN.
2166
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2167d_vendorlib (vendorlib.U):
2168 This variable conditionally defines PERL_VENDORLIB.
2169
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2170d_vendorscript (vendorscript.U):
2171 This variable conditionally defines PERL_VENDORSCRIPT.
2172
781b178c
JH
2173d_vfork (d_vfork.U):
2174 This variable conditionally defines the HAS_VFORK symbol, which
2175 indicates the vfork() routine is available.
2176
2177d_void_closedir (d_closedir.U):
2178 This variable conditionally defines VOID_CLOSEDIR if closedir()
2179 does not return a value.
2180
2181d_voidsig (d_voidsig.U):
2182 This variable conditionally defines VOIDSIG if this system
2183 declares "void (*signal(...))()" in signal.h. The old way was to
2184 declare it as "int (*signal(...))()".
2185
2186d_voidtty (i_sysioctl.U):
2187 This variable conditionally defines USE_IOCNOTTY to indicate that the
2188 ioctl() call with TIOCNOTTY should be used to void tty association.
2189 Otherwise (on USG probably), it is enough to close the standard file
2190 decriptors and do a setpgrp().
2191
2192d_volatile (d_volatile.U):
2193 This variable conditionally defines the HASVOLATILE symbol, which
2194 indicates to the C program that this C compiler knows about the
2195 volatile declaration.
2196
2197d_vprintf (d_vprintf.U):
2198 This variable conditionally defines the HAS_VPRINTF symbol, which
2199 indicates to the C program that the vprintf() routine is available
2200 to printf with a pointer to an argument list.
2201
2202d_wait4 (d_wait4.U):
2203 This variable conditionally defines the HAS_WAIT4 symbol, which
2204 indicates the wait4() routine is available.
2205
2206d_waitpid (d_waitpid.U):
2207 This variable conditionally defines HAS_WAITPID if waitpid() is
2208 available to wait for child process.
2209
2210d_wcstombs (d_wcstombs.U):
2211 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2212 indicates to the C program that the wcstombs() routine is available
2213 to convert wide character strings to multibyte strings.
2214
2215d_wctomb (d_wctomb.U):
2216 This variable conditionally defines the HAS_WCTOMB symbol, which
2217 indicates to the C program that the wctomb() routine is available
2218 to convert a wide character to a multibyte.
2219
4e0554ec
JH
2220d_writev (d_writev.U):
2221 This variable conditionally defines the HAS_WRITEV symbol, which
2222 indicates to the C program that the writev() routine is available.
2223
781b178c
JH
2224d_xenix (Guess.U):
2225 This variable conditionally defines the symbol XENIX, which alerts
2226 the C program that it runs under Xenix.
2227
2228date (Loc.U):
5bf26616 2229 This variable is used internally by Configure to determine the
781b178c
JH
2230 full pathname (if any) of the date program. After Configure runs,
2231 the value is reset to a plain "date" and is not useful.
2232
2233db_hashtype (i_db.U):
2234 This variable contains the type of the hash structure element
2235 in the <db.h> header file. In older versions of DB, it was
2236 int, while in newer ones it is u_int32_t.
2237
2238db_prefixtype (i_db.U):
2239 This variable contains the type of the prefix structure element
2240 in the <db.h> header file. In older versions of DB, it was
2241 int, while in newer ones it is size_t.
2242
640374d0
JH
2243db_version_major (i_db.U):
2244 This variable contains the major version number of
2245 Berkeley DB found in the <db.h> header file.
2246
2247db_version_minor (i_db.U):
2248 This variable contains the minor version number of
2249 Berkeley DB found in the <db.h> header file.
2250 For DB version 1 this is always 0.
2251
2252db_version_patch (i_db.U):
2253 This variable contains the patch version number of
2254 Berkeley DB found in the <db.h> header file.
2255 For DB version 1 this is always 0.
2256
781b178c
JH
2257defvoidused (voidflags.U):
2258 This variable contains the default value of the VOIDUSED symbol (15).
2259
2260direntrytype (i_dirent.U):
2261 This symbol is set to 'struct direct' or 'struct dirent' depending on
2262 whether dirent is available or not. You should use this pseudo type to
2263 portably declare your directory entries.
2264
2265dlext (dlext.U):
2266 This variable contains the extension that is to be used for the
2267 dynamically loaded modules that perl generaties.
2268
2269dlsrc (dlsrc.U):
2270 This variable contains the name of the dynamic loading file that
2271 will be used with the package.
2272
2273doublesize (doublesize.U):
2274 This variable contains the value of the DOUBLESIZE symbol, which
2275 indicates to the C program how many bytes there are in a double.
2276
2277drand01 (randfunc.U):
2278 Indicates the macro to be used to generate normalized
2279 random numbers. Uses randfunc, often divided by
2280 (double) (((unsigned long) 1 << randbits)) in order to
2281 normalize the result.
2282 In C programs, the macro 'Drand01' is mapped to drand01.
2283
10bc17b6
JH
2284drand48_r_proto (d_drand48_r.U):
2285 This variable encodes the prototype of drand48_r.
39183afa
JH
2286 It is zero if d_drand48_r is undef, and one of the
2287 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
2288 is defined.
10bc17b6 2289
781b178c
JH
2290dynamic_ext (Extensions.U):
2291 This variable holds a list of XS extension files we want to
2292 link dynamically into the package. It is used by Makefile.
2293
2294eagain (nblock_io.U):
2295 This variable bears the symbolic errno code set by read() when no
2296 data is present on the file and non-blocking I/O was enabled (otherwise,
2297 read() blocks naturally).
2298
2299ebcdic (ebcdic.U):
2300 This variable conditionally defines EBCDIC if this
2301 system uses EBCDIC encoding. Among other things, this
2302 means that the character ranges are not contiguous.
2303 See trnl.U
2304
2305echo (Loc.U):
5bf26616 2306 This variable is used internally by Configure to determine the
781b178c
JH
2307 full pathname (if any) of the echo program. After Configure runs,
2308 the value is reset to a plain "echo" and is not useful.
2309
2310egrep (Loc.U):
5bf26616 2311 This variable is used internally by Configure to determine the
781b178c
JH
2312 full pathname (if any) of the egrep program. After Configure runs,
2313 the value is reset to a plain "egrep" and is not useful.
2314
2315emacs (Loc.U):
2316 This variable is defined but not used by Configure.
2317 The value is a plain '' and is not useful.
2318
10bc17b6
JH
2319endgrent_r_proto (d_endgrent_r.U):
2320 This variable encodes the prototype of endgrent_r.
39183afa
JH
2321 It is zero if d_endgrent_r is undef, and one of the
2322 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
2323 is defined.
10bc17b6
JH
2324
2325endhostent_r_proto (d_endhostent_r.U):
2326 This variable encodes the prototype of endhostent_r.
39183afa
JH
2327 It is zero if d_endhostent_r is undef, and one of the
2328 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
2329 is defined.
10bc17b6
JH
2330
2331endnetent_r_proto (d_endnetent_r.U):
2332 This variable encodes the prototype of endnetent_r.
39183afa
JH
2333 It is zero if d_endnetent_r is undef, and one of the
2334 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
2335 is defined.
10bc17b6
JH
2336
2337endprotoent_r_proto (d_endprotoent_r.U):
2338 This variable encodes the prototype of endprotoent_r.
39183afa
JH
2339 It is zero if d_endprotoent_r is undef, and one of the
2340 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
2341 is defined.
10bc17b6
JH
2342
2343endpwent_r_proto (d_endpwent_r.U):
2344 This variable encodes the prototype of endpwent_r.
39183afa
JH
2345 It is zero if d_endpwent_r is undef, and one of the
2346 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
2347 is defined.
10bc17b6
JH
2348
2349endservent_r_proto (d_endservent_r.U):
2350 This variable encodes the prototype of endservent_r.
39183afa
JH
2351 It is zero if d_endservent_r is undef, and one of the
2352 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
2353 is defined.
10bc17b6 2354
781b178c
JH
2355eunicefix (Init.U):
2356 When running under Eunice this variable contains a command which will
2357 convert a shell script to the proper form of text file for it to be
2358 executable by the shell. On other systems it is a no-op.
2359
2360exe_ext (Unix.U):
2361 This is an old synonym for _exe.
2362
2363expr (Loc.U):
5bf26616 2364 This variable is used internally by Configure to determine the
781b178c
JH
2365 full pathname (if any) of the expr program. After Configure runs,
2366 the value is reset to a plain "expr" and is not useful.
2367
2368extensions (Extensions.U):
2369 This variable holds a list of all extension files (both XS and
2370 non-xs linked into the package. It is propagated to Config.pm
2371 and is typically used to test whether a particular extesion
2372 is available.
2373
cb7ddd31
JH
2374extras (Extras.U):
2375 This variable holds a list of extra modules to install.
2376
44b94491
MB
2377fflushNULL (fflushall.U):
2378 This symbol, if defined, tells that fflush(NULL) does flush
2379 all pending stdio output.
2380
781b178c
JH
2381fflushall (fflushall.U):
2382 This symbol, if defined, tells that to flush
2383 all pending stdio output one must loop through all
2384 the stdio file handles stored in an array and fflush them.
2385 Note that if fflushNULL is defined, fflushall will not
2386 even be probed for and will be left undefined.
2387
781b178c 2388find (Loc.U):
ff935051
JH
2389 This variable is defined but not used by Configure.
2390 The value is a plain '' and is not useful.
781b178c
JH
2391
2392firstmakefile (Unix.U):
2393 This variable defines the first file searched by make. On unix,
2394 it is makefile (then Makefile). On case-insensitive systems,
2395 it might be something else. This is only used to deal with
2396 convoluted make depend tricks.
2397
2398flex (Loc.U):
2399 This variable is defined but not used by Configure.
2400 The value is a plain '' and is not useful.
2401
a22e52b9
JH
2402fpossize (fpossize.U):
2403 This variable contains the size of a fpostype in bytes.
2404
781b178c 2405fpostype (fpostype.U):
a22e52b9 2406 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2407 uint, or whatever type is used to declare file positions in libc.
2408
2409freetype (mallocsrc.U):
2410 This variable contains the return type of free(). It is usually
2411 void, but occasionally int.
2412
5440bc8e
JH
2413from (Cross.U):
2414 This variable contains the command used by Configure
2415 to copy files from the target host. Useful and available
2416 only during Perl build.
2417 The string ':' if not cross-compiling.
2418
781b178c
JH
2419full_ar (Loc_ar.U):
2420 This variable contains the full pathname to 'ar', whether or
2421 not the user has specified 'portability'. This is only used
2422 in the Makefile.SH.
2423
2424full_csh (d_csh.U):
2425 This variable contains the full pathname to 'csh', whether or
2426 not the user has specified 'portability'. This is only used
2427 in the compiled C program, and we assume that all systems which
2428 can share this executable will have the same full pathname to
2429 'csh.'
2430
2431full_sed (Loc_sed.U):
2432 This variable contains the full pathname to 'sed', whether or
2433 not the user has specified 'portability'. This is only used
2434 in the compiled C program, and we assume that all systems which
2435 can share this executable will have the same full pathname to
2436 'sed.'
2437
123f32c0
MB
2438gccansipedantic (gccvers.U):
2439 If GNU cc (gcc) is used, this variable will enable (if set) the
2440 -ansi and -pedantic ccflags for building core files (through
2441 cflags script). (See Porting/pumpkin.pod for full description).
2442
af960fef 2443gccosandvers (gccvers.U):
123f32c0
MB
2444 If GNU cc (gcc) is used, this variable holds the operating system
2445 and version used to compile gcc. It is set to '' if not gcc,
af960fef
JH
2446 or if nothing useful can be parsed as the os version.
2447
2448gccversion (gccvers.U):
123f32c0 2449 If GNU cc (gcc) is used, this variable holds '1' or '2' to
781b178c
JH
2450 indicate whether the compiler is version 1 or 2. This is used in
2451 setting some of the default cflags. It is set to '' if not gcc.
2452
10bc17b6
JH
2453getgrent_r_proto (d_getgrent_r.U):
2454 This variable encodes the prototype of getgrent_r.
39183afa
JH
2455 It is zero if d_getgrent_r is undef, and one of the
2456 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
2457 is defined.
10bc17b6
JH
2458
2459getgrgid_r_proto (d_getgrgid_r.U):
2460 This variable encodes the prototype of getgrgid_r.
39183afa
JH
2461 It is zero if d_getgrgid_r is undef, and one of the
2462 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
2463 is defined.
10bc17b6
JH
2464
2465getgrnam_r_proto (d_getgrnam_r.U):
2466 This variable encodes the prototype of getgrnam_r.
39183afa
JH
2467 It is zero if d_getgrnam_r is undef, and one of the
2468 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
2469 is defined.
10bc17b6
JH
2470
2471gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
2472 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
2473 It is zero if d_gethostbyaddr_r is undef, and one of the
2474 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
2475 is defined.
10bc17b6
JH
2476
2477gethostbyname_r_proto (d_gethostbyname_r.U):
2478 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
2479 It is zero if d_gethostbyname_r is undef, and one of the
2480 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
2481 is defined.
10bc17b6
JH
2482
2483gethostent_r_proto (d_gethostent_r.U):
2484 This variable encodes the prototype of gethostent_r.
39183afa
JH
2485 It is zero if d_gethostent_r is undef, and one of the
2486 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
2487 is defined.
10bc17b6
JH
2488
2489getlogin_r_proto (d_getlogin_r.U):
2490 This variable encodes the prototype of getlogin_r.
39183afa
JH
2491 It is zero if d_getlogin_r is undef, and one of the
2492 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
2493 is defined.
10bc17b6
JH
2494
2495getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
2496 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
2497 It is zero if d_getnetbyaddr_r is undef, and one of the
2498 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
2499 is defined.
10bc17b6
JH
2500
2501getnetbyname_r_proto (d_getnetbyname_r.U):
2502 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
2503 It is zero if d_getnetbyname_r is undef, and one of the
2504 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
2505 is defined.
10bc17b6
JH
2506
2507getnetent_r_proto (d_getnetent_r.U):
2508 This variable encodes the prototype of getnetent_r.
39183afa
JH
2509 It is zero if d_getnetent_r is undef, and one of the
2510 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
2511 is defined.
10bc17b6
JH
2512
2513getprotobyname_r_proto (d_getprotobyname_r.U):
2514 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
2515 It is zero if d_getprotobyname_r is undef, and one of the
2516 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
2517 is defined.
10bc17b6
JH
2518
2519getprotobynumber_r_proto (d_getprotobynumber_r.U):
2520 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
2521 It is zero if d_getprotobynumber_r is undef, and one of the
2522 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
2523 is defined.
10bc17b6
JH
2524
2525getprotoent_r_proto (d_getprotoent_r.U):
2526 This variable encodes the prototype of getprotoent_r.
39183afa
JH
2527 It is zero if d_getprotoent_r is undef, and one of the
2528 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
2529 is defined.
10bc17b6
JH
2530
2531getpwent_r_proto (d_getpwent_r.U):
2532 This variable encodes the prototype of getpwent_r.
39183afa
JH
2533 It is zero if d_getpwent_r is undef, and one of the
2534 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
2535 is defined.
10bc17b6
JH
2536
2537getpwnam_r_proto (d_getpwnam_r.U):
2538 This variable encodes the prototype of getpwnam_r.
39183afa
JH
2539 It is zero if d_getpwnam_r is undef, and one of the
2540 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
2541 is defined.
10bc17b6
JH
2542
2543getpwuid_r_proto (d_getpwuid_r.U):
2544 This variable encodes the prototype of getpwuid_r.
39183afa
JH
2545 It is zero if d_getpwuid_r is undef, and one of the
2546 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
2547 is defined.
10bc17b6
JH
2548
2549getservbyname_r_proto (d_getservbyname_r.U):
2550 This variable encodes the prototype of getservbyname_r.
39183afa
JH
2551 It is zero if d_getservbyname_r is undef, and one of the
2552 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
2553 is defined.
10bc17b6
JH
2554
2555getservbyport_r_proto (d_getservbyport_r.U):
2556 This variable encodes the prototype of getservbyport_r.
39183afa
JH
2557 It is zero if d_getservbyport_r is undef, and one of the
2558 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
2559 is defined.
10bc17b6
JH
2560
2561getservent_r_proto (d_getservent_r.U):
2562 This variable encodes the prototype of getservent_r.
39183afa
JH
2563 It is zero if d_getservent_r is undef, and one of the
2564 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
2565 is defined.
10bc17b6
JH
2566
2567getspnam_r_proto (d_getspnam_r.U):
2568 This variable encodes the prototype of getspnam_r.
39183afa
JH
2569 It is zero if d_getspnam_r is undef, and one of the
2570 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
2571 is defined.
10bc17b6 2572
a22e52b9
JH
2573gidformat (gidf.U):
2574 This variable contains the format string used for printing a Gid_t.
2575
785fb66b
JH
2576gidsign (gidsign.U):
2577 This variable contains the signedness of a gidtype.
2578 1 for unsigned, -1 for signed.
2579
2580gidsize (gidsize.U):
2581 This variable contains the size of a gidtype in bytes.
2582
781b178c
JH
2583gidtype (gidtype.U):
2584 This variable defines Gid_t to be something like gid_t, int,
2585 ushort, or whatever type is used to declare the return type
2586 of getgid(). Typically, it is the type of group ids in the kernel.
2587
2588glibpth (libpth.U):
2589 This variable holds the general path (space-separated) used to
2590 find libraries. It may contain directories that do not exist on
2591 this platform, libpth is the cleaned-up version.
2592
c68a00c0
JH
2593gmake (Loc.U):
2594 This variable is used internally by Configure to determine the
2595 full pathname (if any) of the gmake program. After Configure runs,
2596 the value is reset to a plain "gmake" and is not useful.
2597
10bc17b6
JH
2598gmtime_r_proto (d_gmtime_r.U):
2599 This variable encodes the prototype of gmtime_r.
39183afa
JH
2600 It is zero if d_gmtime_r is undef, and one of the
2601 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
2602 is defined.
10bc17b6 2603
00fac743
JH
2604gnulibc_version (d_gnulibc.U):
2605 This variable contains the version number of the GNU C library.
2606 It is usually something like '2.2.5'. It is a plain '' if this
2607 is not the GNU C library, or if the version is unknown.
2608
781b178c 2609grep (Loc.U):
5bf26616 2610 This variable is used internally by Configure to determine the
781b178c
JH
2611 full pathname (if any) of the grep program. After Configure runs,
2612 the value is reset to a plain "grep" and is not useful.
2613
2614groupcat (nis.U):
2615 This variable contains a command that produces the text of the
2616 /etc/group file. This is normally "cat /etc/group", but can be
2617 "ypcat group" when NIS is used.
aaacdc8b
GS
2618 On some systems, such as os390, there may be no equivalent
2619 command, in which case this variable is unset.
781b178c
JH
2620
2621groupstype (groupstype.U):
2622 This variable defines Groups_t to be something like gid_t, int,
2623 ushort, or whatever type is used for the second argument to
2624 getgroups() and setgroups(). Usually, this is the same as
2625 gidtype (gid_t), but sometimes it isn't.
2626
2627gzip (Loc.U):
5bf26616 2628 This variable is used internally by Configure to determine the
781b178c
JH
2629 full pathname (if any) of the gzip program. After Configure runs,
2630 the value is reset to a plain "gzip" and is not useful.
2631
2632h_fcntl (h_fcntl.U):
2633 This is variable gets set in various places to tell i_fcntl that
2634 <fcntl.h> should be included.
2635
2636h_sysfile (h_sysfile.U):
2637 This is variable gets set in various places to tell i_sys_file that
2638 <sys/file.h> should be included.
2639
2640hint (Oldconfig.U):
2641 Gives the type of hints used for previous answers. May be one of
2642 "default", "recommended" or "previous".
2643
2644hostcat (nis.U):
2645 This variable contains a command that produces the text of the
2646 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2647 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2648 On some systems, such as os390, there may be no equivalent
2649 command, in which case this variable is unset.
781b178c 2650
10305dfa
JH
2651html1dir (html1dir.U):
2652 This variable contains the name of the directory in which html
2653 source pages are to be put. This directory is for pages
2654 that describe whole programs, not libraries or modules. It
2655 is intended to correspond roughly to section 1 of the Unix
2656 manuals.
2657
2658html1direxp (html1dir.U):
2659 This variable is the same as the html1dir variable, but is filename
2660 expanded at configuration time, for convenient use in makefiles.
2661
2662html3dir (html3dir.U):
2663 This variable contains the name of the directory in which html
2664 source pages are to be put. This directory is for pages
2665 that describe libraries or modules. It is intended to
2666 correspond roughly to section 3 of the Unix manuals.
2667
2668html3direxp (html3dir.U):
2669 This variable is the same as the html3dir variable, but is filename
2670 expanded at configuration time, for convenient use in makefiles.
2671
a22e52b9
JH
2672i16size (perlxv.U):
2673 This variable is the size of an I16 in bytes.
2674
2675i16type (perlxv.U):
2676 This variable contains the C type used for Perl's I16.
2677
2678i32size (perlxv.U):
2679 This variable is the size of an I32 in bytes.
2680
2681i32type (perlxv.U):
2682 This variable contains the C type used for Perl's I32.
2683
2684i64size (perlxv.U):
2685 This variable is the size of an I64 in bytes.
2686
2687i64type (perlxv.U):
2688 This variable contains the C type used for Perl's I64.
2689
2690i8size (perlxv.U):
2691 This variable is the size of an I8 in bytes.
2692
2693i8type (perlxv.U):
2694 This variable contains the C type used for Perl's I8.
2695
781b178c
JH
2696i_arpainet (i_arpainet.U):
2697 This variable conditionally defines the I_ARPA_INET symbol,
2698 and indicates whether a C program should include <arpa/inet.h>.
2699
2700i_bsdioctl (i_sysioctl.U):
2701 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2702 indicates to the C program that <sys/bsdioctl.h> exists and should
2703 be included.
2704
10bc17b6
JH
2705i_crypt (i_crypt.U):
2706 This variable conditionally defines the I_CRYPT symbol, and indicates
2707 whether a C program should include <crypt.h>.
2708
781b178c
JH
2709i_db (i_db.U):
2710 This variable conditionally defines the I_DB symbol, and indicates
2711 whether a C program may include Berkeley's DB include file <db.h>.
2712
2713i_dbm (i_dbm.U):
2714 This variable conditionally defines the I_DBM symbol, which
2715 indicates to the C program that <dbm.h> exists and should
2716 be included.
2717
2718i_dirent (i_dirent.U):
2719 This variable conditionally defines I_DIRENT, which indicates
2720 to the C program that it should include <dirent.h>.
2721
2722i_dld (i_dld.U):
2723 This variable conditionally defines the I_DLD symbol, which
2724 indicates to the C program that <dld.h> (GNU dynamic loading)
2725 exists and should be included.
2726
2727i_dlfcn (i_dlfcn.U):
2728 This variable conditionally defines the I_DLFCN symbol, which
2729 indicates to the C program that <dlfcn.h> exists and should
2730 be included.
2731
2732i_fcntl (i_fcntl.U):
2733 This variable controls the value of I_FCNTL (which tells
2734 the C program to include <fcntl.h>).
2735
2736i_float (i_float.U):
2737 This variable conditionally defines the I_FLOAT symbol, and indicates
2738 whether a C program may include <float.h> to get symbols like DBL_MAX
2739 or DBL_MIN, i.e. machine dependent floating point values.
2740
758a5d79
JH
2741i_fp (i_fp.U):
2742 This variable conditionally defines the I_FP symbol, and indicates
2743 whether a C program should include <fp.h>.
2744
2745i_fp_class (i_fp_class.U):
2746 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2747 whether a C program should include <fp_class.h>.
2748
781b178c
JH
2749i_gdbm (i_gdbm.U):
2750 This variable conditionally defines the I_GDBM symbol, which
2751 indicates to the C program that <gdbm.h> exists and should
2752 be included.
2753
2754i_grp (i_grp.U):
2755 This variable conditionally defines the I_GRP symbol, and indicates
2756 whether a C program should include <grp.h>.
2757
792d8dab
JH
2758i_ieeefp (i_ieeefp.U):
2759 This variable conditionally defines the I_IEEEFP symbol, and indicates
2760 whether a C program should include <ieeefp.h>.
2761
781b178c
JH
2762i_inttypes (i_inttypes.U):
2763 This variable conditionally defines the I_INTTYPES symbol,
2764 and indicates whether a C program should include <inttypes.h>.
2765
2765b840
JH
2766i_langinfo (i_langinfo.U):
2767 This variable conditionally defines the I_LANGINFO symbol,
2768 and indicates whether a C program should include <langinfo.h>.
2769
af960fef
JH
2770i_libutil (i_libutil.U):
2771 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2772 whether a C program should include <libutil.h>.
2773
781b178c
JH
2774i_limits (i_limits.U):
2775 This variable conditionally defines the I_LIMITS symbol, and indicates
2776 whether a C program may include <limits.h> to get symbols like WORD_BIT
2777 and friends.
2778
2779i_locale (i_locale.U):
2780 This variable conditionally defines the I_LOCALE symbol,
2781 and indicates whether a C program should include <locale.h>.
2782
2783i_machcthr (i_machcthr.U):
2784 This variable conditionally defines the I_MACH_CTHREADS symbol,
2785 and indicates whether a C program should include <mach/cthreads.h>.
2786
2787i_malloc (i_malloc.U):
2788 This variable conditionally defines the I_MALLOC symbol, and indicates
2789 whether a C program should include <malloc.h>.
2790
2791i_math (i_math.U):
2792 This variable conditionally defines the I_MATH symbol, and indicates
2793 whether a C program may include <math.h>.
2794
2795i_memory (i_memory.U):
2796 This variable conditionally defines the I_MEMORY symbol, and indicates
2797 whether a C program should include <memory.h>.
2798
2799i_mntent (i_mntent.U):
2800 This variable conditionally defines the I_MNTENT symbol, and indicates
2801 whether a C program should include <mntent.h>.
2802
2803i_ndbm (i_ndbm.U):
2804 This variable conditionally defines the I_NDBM symbol, which
2805 indicates to the C program that <ndbm.h> exists and should
2806 be included.
2807
2808i_netdb (i_netdb.U):
2809 This variable conditionally defines the I_NETDB symbol, and indicates
2810 whether a C program should include <netdb.h>.
2811
2812i_neterrno (i_neterrno.U):
2813 This variable conditionally defines the I_NET_ERRNO symbol, which
2814 indicates to the C program that <net/errno.h> exists and should
2815 be included.
2816
2817i_netinettcp (i_netinettcp.U):
2818 This variable conditionally defines the I_NETINET_TCP symbol,
2819 and indicates whether a C program should include <netinet/tcp.h>.
2820
2821i_niin (i_niin.U):
2822 This variable conditionally defines I_NETINET_IN, which indicates
2823 to the C program that it should include <netinet/in.h>. Otherwise,
2824 you may try <sys/in.h>.
2825
2826i_poll (i_poll.U):
2827 This variable conditionally defines the I_POLL symbol, and indicates
2828 whether a C program should include <poll.h>.
2829
3813c136
JH
2830i_prot (i_prot.U):
2831 This variable conditionally defines the I_PROT symbol, and indicates
2832 whether a C program should include <prot.h>.
2833
781b178c 2834i_pthread (i_pthread.U):
190b66db 2835 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2836 and indicates whether a C program should include <pthread.h>.
2837
2838i_pwd (i_pwd.U):
2839 This variable conditionally defines I_PWD, which indicates
2840 to the C program that it should include <pwd.h>.
2841
2842i_rpcsvcdbm (i_dbm.U):
2843 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2844 indicates to the C program that <rpcsvc/dbm.h> exists and should
2845 be included. Some System V systems might need this instead of <dbm.h>.
2846
2847i_sfio (i_sfio.U):
2848 This variable conditionally defines the I_SFIO symbol,
2849 and indicates whether a C program should include <sfio.h>.
2850
2851i_sgtty (i_termio.U):
2852 This variable conditionally defines the I_SGTTY symbol, which
2853 indicates to the C program that it should include <sgtty.h> rather
2854 than <termio.h>.
2855
2856i_shadow (i_shadow.U):
2857 This variable conditionally defines the I_SHADOW symbol, and indicates
2858 whether a C program should include <shadow.h>.
2859
2860i_socks (i_socks.U):
2861 This variable conditionally defines the I_SOCKS symbol, and indicates
2862 whether a C program should include <socks.h>.
2863
2864i_stdarg (i_varhdr.U):
2865 This variable conditionally defines the I_STDARG symbol, which
2866 indicates to the C program that <stdarg.h> exists and should
2867 be included.
2868
2869i_stddef (i_stddef.U):
2870 This variable conditionally defines the I_STDDEF symbol, which
2871 indicates to the C program that <stddef.h> exists and should
2872 be included.
2873
2874i_stdlib (i_stdlib.U):
2875 This variable conditionally defines the I_STDLIB symbol, which
2876 indicates to the C program that <stdlib.h> exists and should
2877 be included.
2878
2879i_string (i_string.U):
2880 This variable conditionally defines the I_STRING symbol, which
2881 indicates that <string.h> should be included rather than <strings.h>.
2882
792d8dab
JH
2883i_sunmath (i_sunmath.U):
2884 This variable conditionally defines the I_SUNMATH symbol, and indicates
2885 whether a C program should include <sunmath.h>.
2886
781b178c
JH
2887i_sysaccess (i_sysaccess.U):
2888 This variable conditionally defines the I_SYS_ACCESS symbol,
2889 and indicates whether a C program should include <sys/access.h>.
2890
2891i_sysdir (i_sysdir.U):
2892 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2893 whether a C program should include <sys/dir.h>.
2894
2895i_sysfile (i_sysfile.U):
2896 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2897 whether a C program should include <sys/file.h> to get R_OK and friends.
2898
2899i_sysfilio (i_sysioctl.U):
2900 This variable conditionally defines the I_SYS_FILIO symbol, which
2901 indicates to the C program that <sys/filio.h> exists and should
2902 be included in preference to <sys/ioctl.h>.
2903
2904i_sysin (i_niin.U):
2905 This variable conditionally defines I_SYS_IN, which indicates
2906 to the C program that it should include <sys/in.h> instead of
2907 <netinet/in.h>.
2908
2909i_sysioctl (i_sysioctl.U):
2910 This variable conditionally defines the I_SYS_IOCTL symbol, which
2911 indicates to the C program that <sys/ioctl.h> exists and should
2912 be included.
2913
ca52efda
JH
2914i_syslog (i_syslog.U):
2915 This variable conditionally defines the I_SYSLOG symbol,
2916 and indicates whether a C program should include <syslog.h>.
2917
fe749a9f
JH
2918i_sysmman (i_sysmman.U):
2919 This variable conditionally defines the I_SYS_MMAN symbol, and
2920 indicates whether a C program should include <sys/mman.h>.
2921
87b71857
JH
2922i_sysmode (i_sysmode.U):
2923 This variable conditionally defines the I_SYSMODE symbol,
2924 and indicates whether a C program should include <sys/mode.h>.
2925
781b178c
JH
2926i_sysmount (i_sysmount.U):
2927 This variable conditionally defines the I_SYSMOUNT symbol,
2928 and indicates whether a C program should include <sys/mount.h>.
2929
2930i_sysndir (i_sysndir.U):
2931 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2932 whether a C program should include <sys/ndir.h>.
2933
2934i_sysparam (i_sysparam.U):
2935 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2936 whether a C program should include <sys/param.h>.
2937
2938i_sysresrc (i_sysresrc.U):
2939 This variable conditionally defines the I_SYS_RESOURCE symbol,
2940 and indicates whether a C program should include <sys/resource.h>.
2941
2942i_syssecrt (i_syssecrt.U):
2943 This variable conditionally defines the I_SYS_SECURITY symbol,
2944 and indicates whether a C program should include <sys/security.h>.
2945
2946i_sysselct (i_sysselct.U):
2947 This variable conditionally defines I_SYS_SELECT, which indicates
2948 to the C program that it should include <sys/select.h> in order to
2949 get the definition of struct timeval.
2950
2951i_syssockio (i_sysioctl.U):
2952 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2953 C program that socket ioctl codes may be found in <sys/sockio.h>
2954 instead of <sys/ioctl.h>.
2955
2956i_sysstat (i_sysstat.U):
2957 This variable conditionally defines the I_SYS_STAT symbol,
2958 and indicates whether a C program should include <sys/stat.h>.
2959
0545a864
JH
2960i_sysstatfs (i_sysstatfs.U):
2961 This variable conditionally defines the I_SYSSTATFS symbol,
2962 and indicates whether a C program should include <sys/statfs.h>.
2963
781b178c
JH
2964i_sysstatvfs (i_sysstatvfs.U):
2965 This variable conditionally defines the I_SYSSTATVFS symbol,
2966 and indicates whether a C program should include <sys/statvfs.h>.
2967
2968i_systime (i_time.U):
2969 This variable conditionally defines I_SYS_TIME, which indicates
2970 to the C program that it should include <sys/time.h>.
2971
2972i_systimek (i_time.U):
2973 This variable conditionally defines I_SYS_TIME_KERNEL, which
2974 indicates to the C program that it should include <sys/time.h>
2975 with KERNEL defined.
2976
2977i_systimes (i_systimes.U):
2978 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2979 whether a C program should include <sys/times.h>.
2980
2981i_systypes (i_systypes.U):
2982 This variable conditionally defines the I_SYS_TYPES symbol,
2983 and indicates whether a C program should include <sys/types.h>.
2984
2985i_sysuio (i_sysuio.U):
2986 This variable conditionally defines the I_SYSUIO symbol, and indicates
2987 whether a C program should include <sys/uio.h>.
2988
2989i_sysun (i_sysun.U):
2990 This variable conditionally defines I_SYS_UN, which indicates
2991 to the C program that it should include <sys/un.h> to get UNIX
2992 domain socket definitions.
2993
d4935d7f
JH
2994i_sysutsname (i_sysutsname.U):
2995 This variable conditionally defines the I_SYSUTSNAME symbol,
2996 and indicates whether a C program should include <sys/utsname.h>.
2997
0545a864
JH
2998i_sysvfs (i_sysvfs.U):
2999 This variable conditionally defines the I_SYSVFS symbol,
3000 and indicates whether a C program should include <sys/vfs.h>.
3001
781b178c
JH
3002i_syswait (i_syswait.U):
3003 This variable conditionally defines I_SYS_WAIT, which indicates
3004 to the C program that it should include <sys/wait.h>.
3005
3006i_termio (i_termio.U):
3007 This variable conditionally defines the I_TERMIO symbol, which
3008 indicates to the C program that it should include <termio.h> rather
3009 than <sgtty.h>.
3010
3011i_termios (i_termio.U):
3012 This variable conditionally defines the I_TERMIOS symbol, which
3013 indicates to the C program that the POSIX <termios.h> file is
3014 to be included.
3015
3016i_time (i_time.U):
3017 This variable conditionally defines I_TIME, which indicates
3018 to the C program that it should include <time.h>.
3019
3020i_unistd (i_unistd.U):
3021 This variable conditionally defines the I_UNISTD symbol, and indicates
3022 whether a C program should include <unistd.h>.
3023
0545a864
JH
3024i_ustat (i_ustat.U):
3025 This variable conditionally defines the I_USTAT symbol, and indicates
3026 whether a C program should include <ustat.h>.
3027
781b178c
JH
3028i_utime (i_utime.U):
3029 This variable conditionally defines the I_UTIME symbol, and indicates
3030 whether a C program should include <utime.h>.
3031
3032i_values (i_values.U):
3033 This variable conditionally defines the I_VALUES symbol, and indicates
3034 whether a C program may include <values.h> to get symbols like MAXLONG
3035 and friends.
3036
3037i_varargs (i_varhdr.U):
3038 This variable conditionally defines I_VARARGS, which indicates
3039 to the C program that it should include <varargs.h>.
3040
3041i_varhdr (i_varhdr.U):
3042 Contains the name of the header to be included to get va_dcl definition.
3043 Typically one of varargs.h or stdarg.h.
3044
3045i_vfork (i_vfork.U):
3046 This variable conditionally defines the I_VFORK symbol, and indicates
3047 whether a C program should include vfork.h.
3048
3049ignore_versioned_solibs (libs.U):
3050 This variable should be non-empty if non-versioned shared
3051 libraries (libfoo.so.x.y) are to be ignored (because they
3052 cannot be linked against).
3053
ff935051
JH
3054inc_version_list (inc_version_list.U):
3055 This variable specifies the list of subdirectories in over
3056 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
3057 search when adding directories to @INC. The elements in
3058 the list are separated by spaces. This is only useful
ff935051
JH
3059 if you have a perl library directory tree structured like the
3060 default one. See INSTALL for how this works. The versioned
3061 site_perl directory was introduced in 5.005, so that is the
3062 lowest possible value.
3063
3a096bf3
JH
3064inc_version_list_init (inc_version_list.U):
3065 This variable holds the same list as inc_version_list, but
3066 each item is enclosed in double quotes and separated by commas,
3067 suitable for use in the PERL_INC_VERSION_LIST initialization.
3068
781b178c 3069incpath (usrinc.U):
209e5c0a
JH
3070 This variable must preceed the normal include path to get hte
3071 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
3072 Value can be "" or "/bsd43" on mips.
3073
3074inews (Loc.U):
3075 This variable is defined but not used by Configure.
3076 The value is a plain '' and is not useful.
3077
3078installarchlib (archlib.U):
3079 This variable is really the same as archlibexp but may differ on
3080 those systems using AFS. For extra portability, only this variable
3081 should be used in makefiles.
3082
3083installbin (bin.U):
3084 This variable is the same as binexp unless AFS is running in which case
3085 the user is explicitely prompted for it. This variable should always
3086 be used in your makefiles for maximum portability.
3087
10305dfa
JH
3088installhtml1dir (html1dir.U):
3089 This variable is really the same as html1direxp, unless you are
3090 using a different installprefix. For extra portability, you
3091 should only use this variable within your makefiles.
3092
3093installhtml3dir (html3dir.U):
3094 This variable is really the same as html3direxp, unless you are
3095 using a different installprefix. For extra portability, you
3096 should only use this variable within your makefiles.
3097
781b178c
JH
3098installman1dir (man1dir.U):
3099 This variable is really the same as man1direxp, unless you are using
3100 AFS in which case it points to the read/write location whereas
3101 man1direxp only points to the read-only access location. For extra
3102 portability, you should only use this variable within your makefiles.
3103
3104installman3dir (man3dir.U):
3105 This variable is really the same as man3direxp, unless you are using
3106 AFS in which case it points to the read/write location whereas
3107 man3direxp only points to the read-only access location. For extra
3108 portability, you should only use this variable within your makefiles.
3109
3110installprefix (installprefix.U):
3111 This variable holds the name of the directory below which
3112 "make install" will install the package. For most users, this
3113 is the same as prefix. However, it is useful for
3114 installing the software into a different (usually temporary)
3115 location after which it can be bundled up and moved somehow
3116 to the final location specified by prefix.
3117
3118installprefixexp (installprefix.U):
3119 This variable holds the full absolute path of installprefix
3120 with all ~-expansion done.
3121
3122installprivlib (privlib.U):
3123 This variable is really the same as privlibexp but may differ on
3124 those systems using AFS. For extra portability, only this variable
3125 should be used in makefiles.
3126
3127installscript (scriptdir.U):
3128 This variable is usually the same as scriptdirexp, unless you are on
3129 a system running AFS, in which case they may differ slightly. You
3130 should always use this variable within your makefiles for portability.
3131
3132installsitearch (sitearch.U):
3133 This variable is really the same as sitearchexp but may differ on
3134 those systems using AFS. For extra portability, only this variable
3135 should be used in makefiles.
3136
0617aed7
JH
3137installsitebin (sitebin.U):
3138 This variable is usually the same as sitebinexp, unless you are on
3139 a system running AFS, in which case they may differ slightly. You
3140 should always use this variable within your makefiles for portability.
3141
10305dfa
JH
3142installsitehtml1 (sitehtml1.U):
3143 This variable is really the same as sitehtml1exp, unless you are using
3144 AFS in which case it points to the read/write location whereas
3145 html1direxp only points to the read-only access location. For extra
3146 portability, you should only use this variable within your makefiles.
3147
3148installsitehtml3 (sitehtml3.U):
3149 This variable is really the same as sitehtml3exp, unless you are using
3150 AFS in which case it points to the read/write location whereas
3151 html3direxp only points to the read-only access location. For extra
3152 portability, you should only use this variable within your makefiles.
3153
781b178c
JH
3154installsitelib (sitelib.U):
3155 This variable is really the same as sitelibexp but may differ on
3156 those systems using AFS. For extra portability, only this variable
3157 should be used in makefiles.
3158
10305dfa
JH
3159installsiteman1 (siteman1.U):
3160 This variable is really the same as siteman1exp, unless you are using
3161 AFS in which case it points to the read/write location whereas
3162 man1direxp only points to the read-only access location. For extra
3163 portability, you should only use this variable within your makefiles.
3164
3165installsiteman3 (siteman3.U):
3166 This variable is really the same as siteman3exp, unless you are using
3167 AFS in which case it points to the read/write location whereas
3168 man3direxp only points to the read-only access location. For extra
3169 portability, you should only use this variable within your makefiles.
3170
3171installsitescript (sitescript.U):
3172 This variable is usually the same as sitescriptexp, unless you are on
3173 a system running AFS, in which case they may differ slightly. You
3174 should always use this variable within your makefiles for portability.
3175
781b178c
JH
3176installstyle (installstyle.U):
3177 This variable describes the "style" of the perl installation.
3178 This is intended to be useful for tools that need to
3179 manipulate entire perl distributions. Perl itself doesn't use
3180 this to find its libraries -- the library directories are
3181 stored directly in Config.pm. Currently, there are only two
3182 styles: "lib" and "lib/perl5". The default library locations
3183 (e.g. privlib, sitelib) are either $prefix/lib or
3184 $prefix/lib/perl5. The former is useful if $prefix is a
3185 directory dedicated to perl (e.g. /opt/perl), while the latter
3186 is useful if $prefix is shared by many packages, e.g. if
3187 $prefix=/usr/local.
9c20e9bc 3188
123f32c0
MB
3189 Unfortunately, while this "style" variable is used to set
3190 defaults for all three directory hierarchies (core, vendor, and
3191 site), there is no guarantee that the same style is actually
3192 appropriate for all those directories. For example, $prefix
3193 might be /opt/perl, but $siteprefix might be /usr/local.
3194 (Perhaps, in retrospect, the "lib" style should never have been
3195 supported, but it did seem like a nice idea at the time.)
3196
3197 The situation is even less clear for tools such as MakeMaker
3198 that can be used to install additional modules into
3199 non-standard places. For example, if a user intends to install
3200 a module into a private directory (perhaps by setting PREFIX on
3201 the Makefile.PL command line), then there is no reason to
3202 assume that the Configure-time $installstyle setting will be
3203 relevant for that PREFIX.
3204
9c20e9bc 3205 This may later be extended to include other information, so
781b178c 3206 be careful with pattern-matching on the results.
9c20e9bc
JH
3207
3208 For compatibility with perl5.005 and earlier, the default
781b178c
JH
3209 setting is based on whether or not $prefix contains the string
3210 "perl".
3211
3212installusrbinperl (instubperl.U):
3213 This variable tells whether Perl should be installed also as
3214 /usr/bin/perl in addition to
3215 $installbin/perl
3216
526fdc24
MS
3217installvendorarch (vendorarch.U):
3218 This variable is really the same as vendorarchexp but may differ on
3219 those systems using AFS. For extra portability, only this variable
3220 should be used in makefiles.
3221
0617aed7
JH
3222installvendorbin (vendorbin.U):
3223 This variable is really the same as vendorbinexp but may differ on
3224 those systems using AFS. For extra portability, only this variable
3225 should be used in makefiles.
3226
10305dfa
JH
3227installvendorhtml1 (vendorhtml1.U):
3228 This variable is really the same as vendorhtml1exp but may differ on
3229 those systems using AFS. For extra portability, only this variable
3230 should be used in makefiles.
3231
3232installvendorhtml3 (vendorhtml3.U):
3233 This variable is really the same as vendorhtml3exp but may differ on
3234 those systems using AFS. For extra portability, only this variable
3235 should be used in makefiles.
3236
a3635516
JH
3237installvendorlib (vendorlib.U):
3238 This variable is really the same as vendorlibexp but may differ on
3239 those systems using AFS. For extra portability, only this variable
3240 should be used in makefiles.
3241
10305dfa
JH
3242installvendorman1 (vendorman1.U):
3243 This variable is really the same as vendorman1exp but may differ on
3244 those systems using AFS. For extra portability, only this variable
3245 should be used in makefiles.
3246
3247installvendorman3 (vendorman3.U):
3248 This variable is really the same as vendorman3exp but may differ on
3249 those systems using AFS. For extra portability, only this variable
3250 should be used in makefiles.
3251
3252installvendorscript (vendorscript.U):
3253 This variable is really the same as vendorscriptexp but may differ on
3254 those systems using AFS. For extra portability, only this variable
3255 should be used in makefiles.
3256
781b178c
JH
3257intsize (intsize.U):
3258 This variable contains the value of the INTSIZE symbol, which
3259 indicates to the C program how many bytes there are in an int.
3260
4b661809 3261issymlink (issymlink.U):
983dbef6
JH
3262 This variable holds the test command to test for a symbolic link
3263 (if they are supported). Typical values include 'test -h' and
3264 'test -L'.
4b661809 3265
a22e52b9
JH
3266ivdformat (perlxvf.U):
3267 This variable contains the format string used for printing
3268 a Perl IV as a signed decimal integer.
3269
3270ivsize (perlxv.U):
3271 This variable is the size of an IV in bytes.
3272
3273ivtype (perlxv.U):
3274 This variable contains the C type used for Perl's IV.
3275
781b178c
JH
3276known_extensions (Extensions.U):
3277 This variable holds a list of all XS extensions included in
3278 the package.
3279
3280ksh (Loc.U):
3281 This variable is defined but not used by Configure.
3282 The value is a plain '' and is not useful.
3283
781b178c
JH
3284ld (dlsrc.U):
3285 This variable indicates the program to be used to link
3286 libraries for dynamic loading. On some systems, it is 'ld'.
3287 On ELF systems, it should be $cc. Mostly, we'll try to respect
3288 the hint file setting.
3289
3290lddlflags (dlsrc.U):
3291 This variable contains any special flags that might need to be
3292 passed to $ld to create a shared library suitable for dynamic
3293 loading. It is up to the makefile to use it. For hpux, it
3294 should be '-b'. For sunos 4.1, it is empty.
3295
3296ldflags (ccflags.U):
3297 This variable contains any additional C loader flags desired by
3298 the user. It is up to the Makefile to use this.
3299
af960fef
JH
3300ldflags_uselargefiles (uselfs.U):
3301 This variable contains the loader flags needed by large file builds
3302 and added to ldflags by hints files.
3303
781b178c
JH
3304ldlibpthname (libperl.U):
3305 This variable holds the name of the shared library
3306 search path, often LD_LIBRARY_PATH. To get an empty
3307 string, the hints file must set this to 'none'.
3308
3309less (Loc.U):
5bf26616 3310 This variable is used internally by Configure to determine the
781b178c
JH
3311 full pathname (if any) of the less program. After Configure runs,
3312 the value is reset to a plain "less" and is not useful.
3313
3314lib_ext (Unix.U):
3315 This is an old synonym for _a.
3316
3317libc (libc.U):
3318 This variable contains the location of the C library.
3319
3320libperl (libperl.U):
3321 The perl executable is obtained by linking perlmain.c with
3322 libperl, any static extensions (usually just DynaLoader),
3323 and any other libraries needed on this system. libperl
3324 is usually libperl.a, but can also be libperl.so.xxx if
3325 the user wishes to build a perl executable with a shared
3326 library.
3327
3328libpth (libpth.U):
3329 This variable holds the general path (space-separated) used to find
3330 libraries. It is intended to be used by other units.
3331
3332libs (libs.U):
3333 This variable holds the additional libraries we want to use.
9285ede2 3334 It is up to the Makefile to deal with it. The list can be empty.
781b178c 3335
fe749a9f
JH
3336libsdirs (libs.U):
3337 This variable holds the directory names aka dirnames of the libraries
3338 we found and accepted, duplicates are removed.
3339
3340libsfiles (libs.U):
3341 This variable holds the filenames aka basenames of the libraries
3342 we found and accepted.
3343
3344libsfound (libs.U):
3345 This variable holds the full pathnames of the libraries
3346 we found and accepted.
3347
13b3f787
JH
3348libspath (libs.U):
3349 This variable holds the directory names probed for libraries.
3350
781b178c
JH
3351libswanted (Myinit.U):
3352 This variable holds a list of all the libraries we want to
3353 search. The order is chosen to pick up the c library
3354 ahead of ucb or bsd libraries for SVR4.
3355
af960fef
JH
3356libswanted_uselargefiles (uselfs.U):
3357 This variable contains the libraries needed by large file builds
3358 and added to ldflags by hints files. It is a space separated list
3359 of the library names without the "lib" prefix or any suffix, just
209e5c0a 3360 like libswanted..
af960fef 3361
781b178c 3362line (Loc.U):
ff935051
JH
3363 This variable is defined but not used by Configure.
3364 The value is a plain '' and is not useful.
781b178c
JH
3365
3366lint (Loc.U):
3367 This variable is defined but not used by Configure.
3368 The value is a plain '' and is not useful.
3369
3370lkflags (ccflags.U):
3371 This variable contains any additional C partial linker flags desired by
3372 the user. It is up to the Makefile to use this.
3373
3374ln (Loc.U):
5bf26616 3375 This variable is used internally by Configure to determine the
781b178c
JH
3376 full pathname (if any) of the ln program. After Configure runs,
3377 the value is reset to a plain "ln" and is not useful.
3378
3379lns (lns.U):
3380 This variable holds the name of the command to make
3381 symbolic links (if they are supported). It can be used
3382 in the Makefile. It is either 'ln -s' or 'ln'
3383
10bc17b6
JH
3384localtime_r_proto (d_localtime_r.U):
3385 This variable encodes the prototype of localtime_r.
39183afa
JH
3386 It is zero if d_localtime_r is undef, and one of the
3387 REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r
3388 is defined.
10bc17b6 3389
781b178c
JH
3390locincpth (ccflags.U):
3391 This variable contains a list of additional directories to be
3392 searched by the compiler. The appropriate '-I' directives will
3393 be added to ccflags. This is intended to simplify setting
3394 local directories from the Configure command line.
3395 It's not much, but it parallels the loclibpth stuff in libpth.U.
3396
3397loclibpth (libpth.U):
3398 This variable holds the paths (space-separated) used to find local
3399 libraries. It is prepended to libpth, and is intended to be easily
3400 set from the command line.
3401
3402longdblsize (d_longdbl.U):
3403 This variable contains the value of the LONG_DOUBLESIZE symbol, which
3404 indicates to the C program how many bytes there are in a long double,
3405 if this system supports long doubles.
3406
3407longlongsize (d_longlong.U):
3408 This variable contains the value of the LONGLONGSIZE symbol, which
3409 indicates to the C program how many bytes there are in a long long,
3410 if this system supports long long.
3411
3412longsize (intsize.U):
3413 This variable contains the value of the LONGSIZE symbol, which
3414 indicates to the C program how many bytes there are in a long.
3415
3416lp (Loc.U):
3417 This variable is defined but not used by Configure.
3418 The value is a plain '' and is not useful.
3419
3420lpr (Loc.U):
3421 This variable is defined but not used by Configure.
3422 The value is a plain '' and is not useful.
3423
3424ls (Loc.U):
5bf26616 3425 This variable is used internally by Configure to determine the
781b178c
JH
3426 full pathname (if any) of the ls program. After Configure runs,
3427 the value is reset to a plain "ls" and is not useful.
3428
3429lseeksize (lseektype.U):
3430 This variable defines lseektype to be something like off_t, long,
3431 or whatever type is used to declare lseek offset's type in the
3432 kernel (which also appears to be lseek's return type).
3433
3434lseektype (lseektype.U):
3435 This variable defines lseektype to be something like off_t, long,
3436 or whatever type is used to declare lseek offset's type in the
3437 kernel (which also appears to be lseek's return type).
3438
3439mail (Loc.U):
3440 This variable is defined but not used by Configure.
3441 The value is a plain '' and is not useful.
3442
3443mailx (Loc.U):
3444 This variable is defined but not used by Configure.
3445 The value is a plain '' and is not useful.
3446
3447make (Loc.U):
5bf26616 3448 This variable is used internally by Configure to determine the
c532c9d1
JH
3449 full pathname (if any) of the make program. After Configure runs,
3450 the value is reset to a plain "make" and is not useful.
3451
781b178c
JH
3452make_set_make (make.U):
3453 Some versions of 'make' set the variable MAKE. Others do not.
3454 This variable contains the string to be included in Makefile.SH
3455 so that MAKE is set if needed, and not if not needed.
3456 Possible values are:
44b94491 3457
781b178c 3458 make_set_make='#' # If your make program handles this for you,
44b94491 3459
781b178c 3460 make_set_make="MAKE=$make" # if it doesn't.
44b94491
MB
3461
3462 This uses a comment character to distinguish a
781b178c
JH
3463 'set' value (from a previous config.sh or Configure '-D' option)
3464 from an uncomputed value.
3465
3466mallocobj (mallocsrc.U):
3467 This variable contains the name of the malloc.o that this package
3468 generates, if that malloc.o is preferred over the system malloc.
3469 Otherwise the value is null. This variable is intended for generating
3470 Makefiles. See mallocsrc.
3471
3472mallocsrc (mallocsrc.U):
3473 This variable contains the name of the malloc.c that comes with
3474 the package, if that malloc.c is preferred over the system malloc.
3475 Otherwise the value is null. This variable is intended for generating
3476 Makefiles.
3477
3478malloctype (mallocsrc.U):
3479 This variable contains the kind of ptr returned by malloc and realloc.
3480
3481man1dir (man1dir.U):
3482 This variable contains the name of the directory in which manual
3483 source pages are to be put. It is the responsibility of the
3484 Makefile.SH to get the value of this into the proper command.
3485 You must be prepared to do the ~name expansion yourself.
3486
3487man1direxp (man1dir.U):
3488 This variable is the same as the man1dir variable, but is filename
3489 expanded at configuration time, for convenient use in makefiles.
3490
3491man1ext (man1dir.U):
3492 This variable contains the extension that the manual page should
3493 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
3494 See man1dir.
3495
3496man3dir (man3dir.U):
3497 This variable contains the name of the directory in which manual
3498 source pages are to be put. It is the responsibility of the
3499 Makefile.SH to get the value of this into the proper command.
3500 You must be prepared to do the ~name expansion yourself.
3501
3502man3direxp (man3dir.U):
3503 This variable is the same as the man3dir variable, but is filename
3504 expanded at configuration time, for convenient use in makefiles.
3505
3506man3ext (man3dir.U):
3507 This variable contains the extension that the manual page should
3508 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
3509 See man3dir.
3510
781b178c
JH
3511mips_type (usrinc.U):
3512 This variable holds the environment type for the mips system.
3513 Possible values are "BSD 4.3" and "System V".
3514
3515mkdir (Loc.U):
5bf26616 3516 This variable is used internally by Configure to determine the
781b178c
JH
3517 full pathname (if any) of the mkdir program. After Configure runs,
3518 the value is reset to a plain "mkdir" and is not useful.
3519
fe749a9f
JH
3520mmaptype (d_mmap.U):
3521 This symbol contains the type of pointer returned by mmap()
3522 (and simultaneously the type of the first argument).
3523 It can be 'void *' or 'caddr_t'.
3524
781b178c
JH
3525modetype (modetype.U):
3526 This variable defines modetype to be something like mode_t,
3527 int, unsigned short, or whatever type is used to declare file
3528 modes for system calls.
3529
3530more (Loc.U):
5bf26616 3531 This variable is used internally by Configure to determine the
781b178c
JH
3532 full pathname (if any) of the more program. After Configure runs,
3533 the value is reset to a plain "more" and is not useful.
3534
3535multiarch (multiarch.U):
3536 This variable conditionally defines the MULTIARCH symbol
3537 which signifies the presence of multiplatform files.
3538 This is normally set by hints files.
3539
3540mv (Loc.U):
3541 This variable is defined but not used by Configure.
3542 The value is a plain '' and is not useful.
3543
3544myarchname (archname.U):
3545 This variable holds the architecture name computed by Configure in
3546 a previous run. It is not intended to be perused by any user and
3547 should never be set in a hint file.
3548
3549mydomain (myhostname.U):
3550 This variable contains the eventual value of the MYDOMAIN symbol,
3551 which is the domain of the host the program is going to run on.
3552 The domain must be appended to myhostname to form a complete host name.
3553 The dot comes with mydomain, and need not be supplied by the program.
3554
3555myhostname (myhostname.U):
3556 This variable contains the eventual value of the MYHOSTNAME symbol,
3557 which is the name of the host the program is going to run on.
3558 The domain is not kept with hostname, but must be gotten from mydomain.
3559 The dot comes with mydomain, and need not be supplied by the program.
3560
3561myuname (Oldconfig.U):
3562 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
3563 pseudo variables assignments in the output are stripped, thank you. The
3564 whole thing is then lower-cased.
3565
3566n (n.U):
3567 This variable contains the '-n' flag if that is what causes the echo
3568 command to suppress newline. Otherwise it is null. Correct usage is
3569 $echo $n "prompt for a question: $c".
3570
2cc61e15
DD
3571need_va_copy (need_va_copy.U):
3572 This symbol, if defined, indicates that the system stores
3573 the variable argument list datatype, va_list, in a format
3574 that cannot be copied by simple assignment, so that some
3575 other means must be used when copying is required.
3576 As such systems vary in their provision (or non-provision)
3577 of copying mechanisms, handy.h defines a platform-
3578 independent macro, Perl_va_copy(src, dst), to do the job.
3579
781b178c
JH
3580netdb_hlen_type (netdbtype.U):
3581 This variable holds the type used for the 2nd argument to
3582 gethostbyaddr(). Usually, this is int or size_t or unsigned.
3583 This is only useful if you have gethostbyaddr(), naturally.
3584
3585netdb_host_type (netdbtype.U):
3586 This variable holds the type used for the 1st argument to
3587 gethostbyaddr(). Usually, this is char * or void *, possibly
3588 with or without a const prefix.
3589 This is only useful if you have gethostbyaddr(), naturally.
3590
3591netdb_name_type (netdbtype.U):
3592 This variable holds the type used for the argument to
3593 gethostbyname(). Usually, this is char * or const char *.
3594 This is only useful if you have gethostbyname(), naturally.
3595
3596netdb_net_type (netdbtype.U):
3597 This variable holds the type used for the 1st argument to
3598 getnetbyaddr(). Usually, this is int or long.
3599 This is only useful if you have getnetbyaddr(), naturally.
3600
3601nm (Loc.U):
5bf26616 3602 This variable is used internally by Configure to determine the
781b178c
JH
3603 full pathname (if any) of the nm program. After Configure runs,
3604 the value is reset to a plain "nm" and is not useful.
3605
3606nm_opt (usenm.U):
3607 This variable holds the options that may be necessary for nm.
3608
3609nm_so_opt (usenm.U):
3610 This variable holds the options that may be necessary for nm
3611 to work on a shared library but that can not be used on an
3612 archive library. Currently, this is only used by Linux, where
3613 nm --dynamic is *required* to get symbols from an ELF library which
3614 has been stripped, but nm --dynamic is *fatal* on an archive library.
3615 Maybe Linux should just always set usenm=false.
3616
3617nonxs_ext (Extensions.U):
3618 This variable holds a list of all non-xs extensions included
3619 in the package. All of them will be built.
3620
3621nroff (Loc.U):
5bf26616 3622 This variable is used internally by Configure to determine the
781b178c
JH
3623 full pathname (if any) of the nroff program. After Configure runs,
3624 the value is reset to a plain "nroff" and is not useful.
3625
44b94491
MB
3626nvEUformat (perlxvf.U):
3627 This variable contains the format string used for printing
3628 a Perl NV using %E-ish floating point format.
3629
3630nvFUformat (perlxvf.U):
3631 This variable confains the format string used for printing
3632 a Perl NV using %F-ish floating point format.
3633
3634nvGUformat (perlxvf.U):
3635 This variable contains the format string used for printing
3636 a Perl NV using %G-ish floating point format.
3637
2f12987e
JH
3638nv_preserves_uv_bits (perlxv.U):
3639 This variable indicates how many of bits type uvtype
3640 a variable nvtype can preserve.
3641
6b4667fc
A
3642nveformat (perlxvf.U):
3643 This variable contains the format string used for printing
3644 a Perl NV using %e-ish floating point format.
3645
6b4667fc
A
3646nvfformat (perlxvf.U):
3647 This variable confains the format string used for printing
3648 a Perl NV using %f-ish floating point format.
3649
6b4667fc
A
3650nvgformat (perlxvf.U):
3651 This variable contains the format string used for printing
3652 a Perl NV using %g-ish floating point format.
3653
a22e52b9
JH
3654nvsize (perlxv.U):
3655 This variable is the size of an NV in bytes.
3656
3657nvtype (perlxv.U):
3658 This variable contains the C type used for Perl's NV.
3659
781b178c
JH
3660o_nonblock (nblock_io.U):
3661 This variable bears the symbol value to be used during open() or fcntl()
3662 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3663 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3664 but that is only supported by some devices.
3665
3666obj_ext (Unix.U):
3667 This is an old synonym for _o.
3668
3669old_pthread_create_joinable (d_pthrattrj.U):
3670 This variable defines the constant to use for creating joinable
3671 (aka undetached) pthreads. Unused if pthread.h defines
3672 PTHREAD_CREATE_JOINABLE. If used, possible values are
3673 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3674
3675optimize (ccflags.U):
3676 This variable contains any optimizer/debugger flag that should be used.
3677 It is up to the Makefile to use it.
3678
3679orderlib (orderlib.U):
3680 This variable is "true" if the components of libraries must be ordered
3681 (with `lorder $* | tsort`) before placing them in an archive. Set to
3682 "false" if ranlib or ar can generate random libraries.
3683
3684osname (Oldconfig.U):
3685 This variable contains the operating system name (e.g. sunos,
3686 solaris, hpux, etc.). It can be useful later on for setting
3687 defaults. Any spaces are replaced with underscores. It is set
3688 to a null string if we can't figure it out.
3689
3690osvers (Oldconfig.U):
3691 This variable contains the operating system version (e.g.
3692 4.1.3, 5.2, etc.). It is primarily used for helping select
3693 an appropriate hints file, but might be useful elsewhere for
3694 setting defaults. It is set to '' if we can't figure it out.
3695 We try to be flexible about how much of the version number
3696 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3697 same for this package, hints files might just be os_4.0 or
3698 os_4.1, etc., not keeping separate files for each little release.
3699
3b777bb4
GS
3700otherlibdirs (otherlibdirs.U):
3701 This variable contains a colon-separated set of paths for the perl
3702 binary to search for additional library files or modules.
3703 These directories will be tacked to the end of @INC.
3704 Perl will automatically search below each path for version-
3705 and architecture-specific directories. See inc_version_list
3706 for more details.
3707 A value of ' ' means 'none' and is used to preserve this value
3708 for the next run through Configure.
3709
781b178c
JH
3710package (package.U):
3711 This variable contains the name of the package being constructed.
3712 It is primarily intended for the use of later Configure units.
3713
3714pager (pager.U):
3715 This variable contains the name of the preferred pager on the system.
3716 Usual values are (the full pathnames of) more, less, pg, or cat.
3717
3718passcat (nis.U):
3719 This variable contains a command that produces the text of the
3720 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3721 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3722 On some systems, such as os390, there may be no equivalent
3723 command, in which case this variable is unset.
781b178c
JH
3724
3725patchlevel (patchlevel.U):
3726 The patchlevel level of this package.
3727 The value of patchlevel comes from the patchlevel.h file.
ff935051 3728 In a version number such as 5.6.1, this is the "6".
c890dc6c 3729 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3730
3731path_sep (Unix.U):
3732 This is an old synonym for p_ in Head.U, the character
3733 used to separate elements in the command shell search PATH.
3734
c890dc6c
JH
3735perl5 (perl5.U):
3736 This variable contains the full path (if any) to a previously
3737 installed perl5.005 or later suitable for running the script
3738 to determine inc_version_list.
3739
781b178c 3740perl (Loc.U):
c890dc6c
JH
3741 This variable is defined but not used by Configure.
3742 The value is a plain '' and is not useful.
781b178c 3743
a6d26a0d
JH
3744perl_patchlevel (patchlevel.U):
3745 This is the Perl patch level, a numeric change identifier,
3746 as defined by whichever source code maintenance system
3747 is used to maintain the patches; currently Perforce.
3748 It does not correlate with the Perl version numbers or
3749 the maintenance versus development dichotomy except
3750 by also being increasing.
3751
781b178c
JH
3752perladmin (perladmin.U):
3753 Electronic mail address of the perl5 administrator.
3754
b7a73309
JH
3755perllibs (End.U):
3756 The list of libraries needed by Perl only (any libraries needed
3757 by extensions only will by dropped, if using dynamic loading).
3758
781b178c
JH
3759perlpath (perlpath.U):
3760 This variable contains the eventual value of the PERLPATH symbol,
3761 which contains the name of the perl interpreter to be used in
a10d74f3
PG
3762 shell scripts and in the "eval 'exec'" idiom. This variable is
3763 not necessarily the pathname of the file containing the perl
3764 interpreter; you must append the executable extension (_exe) if
3765 it is not already present. Note that Perl code that runs during
3766 the Perl build process cannot reference this variable, as Perl
3767 may not have been installed, or even if installed, may be a
3768 different version of Perl.
781b178c
JH
3769
3770pg (Loc.U):
5bf26616 3771 This variable is used internally by Configure to determine the
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3772 full pathname (if any) of the pg program. After Configure runs,
3773 the value is reset to a plain "pg" and is not useful.
3774
3775phostname (myhostname.U):
3776 This variable contains the eventual value of the PHOSTNAME symbol,
3777 which is a command that can be fed to popen() to get the host name.
3778 The program should probably not presume that the domain is or isn't
3779 there already.
3780
3781pidtype (pidtype.U):
3782 This variable defines PIDTYPE to be something like pid_t, int,
3783 ushort, or whatever type is used to declare process ids in the kernel.
3784
3785plibpth (libpth.U):
3786 Holds the private path used by Configure to find out the libraries.
3787 Its value is prepend to libpth. This variable takes care of special
3788 machines, like the mips. Usually, it should be empty.
3789
fe749a9f
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3790pm_apiversion (xs_apiversion.U):
3791 This variable contains the version of the oldest perl
3792 compatible with the present perl. (That is, pure perl modules
3793 written for $pm_apiversion will still work for the current
3794 version). perl.c:incpush() and lib/lib.pm will automatically
3795 search in $sitelib for older directories across major versions
3796 back to pm_apiversion. This is only useful if you have a perl
3797 library directory tree structured like the default one. The
3798 versioned site_perl library was introduced in 5.005, so that's
3799 the default setting for this variable. It's hard to imagine
3800 it changing before Perl6. It is included here for symmetry
3801 with xs_apiveprsion -- the searching algorithms will
3802 (presumably) be similar.
3803 See the INSTALL file for how this works.
3804
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3805pmake (Loc.U):
3806 This variable is defined but not used by Configure.
3807 The value is a plain '' and is not useful.
3808
3809pr (Loc.U):
3810 This variable is defined but not used by Configure.
3811 The value is a plain '' and is not useful.
3812
3813prefix (prefix.U):
3814 This variable holds the name of the directory below which the
3815 user will install the package. Usually, this is /usr/local, and
3816 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3817 man pages in /usr/local/man, etc. It is only used to set defaults
3818 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3819
3820prefixexp (prefix.U):
3821 This variable holds the full absolute path of the directory below
3822 which the user will install the package. Derived from prefix.
3823
3824privlib (privlib.U):
3825 This variable contains the eventual value of the PRIVLIB symbol,
3826 which is the name of the private library for this package. It may
3827 have a ~ on the front. It is up to the makefile to eventually create
3828 this directory while performing installation (with ~ substitution).
3829
3830privlibexp (privlib.U):
3831 This variable is the ~name expanded version of privlib, so that you
3832 may use it directly in Makefiles or shell scripts.
3833
428dc699
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3834procselfexe (d_procselfexe.U):
3835 If d_procselfexe is defined, $procselfexe is the filename
3836 of the symbolic link pointing to the absolute pathname of
3837 the executing program.
3838
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3839prototype (prototype.U):
3840 This variable holds the eventual value of CAN_PROTOTYPE, which
3841 indicates the C compiler can handle funciton prototypes.
3842
3843ptrsize (ptrsize.U):
3844 This variable contains the value of the PTRSIZE symbol, which
3845 indicates to the C program how many bytes there are in a pointer.
3846
e0a10278 3847quadkind (quadtype.U):
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JH
3848 This variable, if defined, encodes the type of a quad:
3849 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3850
3851quadtype (quadtype.U):
3852 This variable defines Quad_t to be something like long, int,
3853 long long, int64_t, or whatever type is used for 64-bit integers.
3854
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3855randbits (randfunc.U):
3856 Indicates how many bits are produced by the function used to
3857 generate normalized random numbers.
3858
3859randfunc (randfunc.U):
3860 Indicates the name of the random number function to use.
3861 Values include drand48, random, and rand. In C programs,
3862 the 'Drand01' macro is defined to generate uniformly distributed
3863 random numbers over the range [0., 1.[ (see drand01 and nrand).
3864
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3865random_r_proto (d_random_r.U):
3866 This variable encodes the prototype of random_r.
39183afa
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3867 It is zero if d_random_r is undef, and one of the
3868 REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r
3869 is defined.
10bc17b6 3870
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3871randseedtype (randfunc.U):
3872 Indicates the type of the argument of the seedfunc.
3873
3874ranlib (orderlib.U):
3875 This variable is set to the pathname of the ranlib program, if it is
3876 needed to generate random libraries. Set to ":" if ar can generate
3877 random libraries or if random libraries are not supported
3878
3879rd_nodata (nblock_io.U):
3880 This variable holds the return code from read() when no data is
3881 present. It should be -1, but some systems return 0 when O_NDELAY is
3882 used, which is a shame because you cannot make the difference between
209e5c0a 3883 no data and an EOF.. Sigh!
781b178c 3884
10bc17b6
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3885readdir64_r_proto (d_readdir64_r.U):
3886 This variable encodes the prototype of readdir64_r.
39183afa
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3887 It is zero if d_readdir64_r is undef, and one of the
3888 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r
3889 is defined.
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3890
3891readdir_r_proto (d_readdir_r.U):
3892 This variable encodes the prototype of readdir_r.
39183afa
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3893 It is zero if d_readdir_r is undef, and one of the
3894 REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r
3895 is defined.
10bc17b6 3896
c890dc6c
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3897revision (patchlevel.U):
3898 The value of revision comes from the patchlevel.h file.
3899 In a version number such as 5.6.1, this is the "5".
3900 In patchlevel.h, this is referred to as "PERL_REVISION".
3901
781b178c 3902rm (Loc.U):
5bf26616 3903 This variable is used internally by Configure to determine the
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3904 full pathname (if any) of the rm program. After Configure runs,
3905 the value is reset to a plain "rm" and is not useful.
3906
3907rmail (Loc.U):
3908 This variable is defined but not used by Configure.
3909 The value is a plain '' and is not useful.
3910
5440bc8e
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3911run (Cross.U):
3912 This variable contains the command used by Configure
3913 to copy and execute a cross-compiled executable in the
3914 target host. Useful and available only during Perl build.
3915 Empty string '' if not cross-compiling.
3916
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3917runnm (usenm.U):
3918 This variable contains 'true' or 'false' depending whether the
3919 nm extraction should be performed or not, according to the value
3920 of usenm and the flags on the Configure command line.
3921
44b94491
MB
3922sPRIEUldbl (longdblfio.U):
3923 This variable, if defined, contains the string used by stdio to
3924 format long doubles (format 'E') for output.
3925 The 'U' in the name is to separate this from sPRIeldbl so that even
3926 case-blind systems can see the difference.
3927
3928sPRIFUldbl (longdblfio.U):
3929 This variable, if defined, contains the string used by stdio to
3930 format long doubles (format 'F') for output.
3931 The 'U' in the name is to separate this from sPRIfldbl so that even
3932 case-blind systems can see the difference.
3933
3934sPRIGUldbl (longdblfio.U):
3935 This variable, if defined, contains the string used by stdio to
3936 format long doubles (format 'G') for output.
3937 The 'U' in the name is to separate this from sPRIgldbl so that even
3938 case-blind systems can see the difference.
3939
3940sPRIXU64 (quadfio.U):
3941 This variable, if defined, contains the string used by stdio to
3942 format 64-bit hExADECimAl numbers (format 'X') for output.
3943 The 'U' in the name is to separate this from sPRIx64 so that even
3944 case-blind systems can see the difference.
3945
3946sPRId64 (quadfio.U):
3947 This variable, if defined, contains the string used by stdio to
3948 format 64-bit decimal numbers (format 'd') for output.
3949
3950sPRIeldbl (longdblfio.U):
3951 This variable, if defined, contains the string used by stdio to
3952 format long doubles (format 'e') for output.
3953
3954sPRIfldbl (longdblfio.U):
3955 This variable, if defined, contains the string used by stdio to
3956 format long doubles (format 'f') for output.
3957
3958sPRIgldbl (longdblfio.U):
3959 This variable, if defined, contains the string used by stdio to
3960 format long doubles (format 'g') for output.
3961
3962sPRIi64 (quadfio.U):
3963 This variable, if defined, contains the string used by stdio to
3964 format 64-bit decimal numbers (format 'i') for output.
3965
3966sPRIo64 (quadfio.U):
3967 This variable, if defined, contains the string used by stdio to
3968 format 64-bit octal numbers (format 'o') for output.
3969
3970sPRIu64 (quadfio.U):
3971 This variable, if defined, contains the string used by stdio to
3972 format 64-bit unsigned decimal numbers (format 'u') for output.
3973
3974sPRIx64 (quadfio.U):
3975 This variable, if defined, contains the string used by stdio to
3976 format 64-bit hexadecimal numbers (format 'x') for output.
3977
3978sSCNfldbl (longdblfio.U):
3979 This variable, if defined, contains the string used by stdio to
3980 format long doubles (format 'f') for input.
3981
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3982sched_yield (d_pthread_y.U):
3983 This variable defines the way to yield the execution
3984 of the current thread.
3985
3986scriptdir (scriptdir.U):
3987 This variable holds the name of the directory in which the user wants
3988 to put publicly scripts for the package in question. It is either
3989 the same directory as for binaries, or a special one that can be
3990 mounted across different architectures, like /usr/share. Programs
3991 must be prepared to deal with ~name expansion.
3992
3993scriptdirexp (scriptdir.U):
3994 This variable is the same as scriptdir, but is filename expanded
3995 at configuration time, for programs not wanting to bother with it.
3996
3997sed (Loc.U):
5bf26616 3998 This variable is used internally by Configure to determine the
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3999 full pathname (if any) of the sed program. After Configure runs,
4000 the value is reset to a plain "sed" and is not useful.
4001
4002seedfunc (randfunc.U):
4003 Indicates the random number generating seed function.
4004 Values include srand48, srandom, and srand.
4005
4006selectminbits (selectminbits.U):
4007 This variable holds the minimum number of bits operated by select.
4008 That is, if you do select(n, ...), how many