This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
(perl #130108) check if dtrace accepts -xnolibs and use it if available
[perl5.git] / Porting / Glossary
CommitLineData
1f822b28
JH
1
2!!!!!!! DO NOT EDIT THIS FILE !!!!!!!
3This file is built by metaconfig.
4
d7418ba7
PP
5This file contains a description of all the shell variables whose value is
6determined by the Configure script. Variables intended for use in C
269a7913 7programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
ebc74a4b 8generates pod documentation for Config.pm from this file--please try to keep
24412007 9the formatting regular.]
d7418ba7 10
781b178c 11_a (Unix.U):
9285ede2 12 This variable defines the extension used for ordinary library files.
781b178c
JH
13 For unix, it is '.a'. The '.' is included. Other possible
14 values include '.lib'.
15
16_exe (Unix.U):
17 This variable defines the extension used for executable files.
24412007
JH
18 DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.
19 On operating systems which do not require a specific extension
20 for executable files, this variable is empty.
781b178c
JH
21
22_o (Unix.U):
23 This variable defines the extension used for object files.
24 For unix, it is '.o'. The '.' is included. Other possible
25 values include '.obj'.
26
27afs (afs.U):
28 This variable is set to 'true' if AFS (Andrew File System) is used
29 on the system, 'false' otherwise. It is possible to override this
30 with a hint value or command line option, but you'd better know
31 what you are doing.
32
a6d26a0d
JH
33afsroot (afs.U):
34 This variable is by default set to '/afs'. In the unlikely case
35 this is not the correct root, it is possible to override this with
36 a hint value or command line option. This will be used in subsequent
776a38e3 37 tests for AFSness in the configure and test process.
a6d26a0d 38
781b178c
JH
39alignbytes (alignbytes.U):
40 This variable holds the number of bytes required to align a
87b71857
JH
41 double-- or a long double when applicable. Usual values are
42 2, 4 and 8. The default is eight, for safety.
781b178c
JH
43
44ansi2knr (ansi2knr.U):
635aebb7 45 This variable is set if the user needs to run ansi2knr.
781b178c
JH
46 Currently, this is not supported, so we just abort.
47
48aphostname (d_gethname.U):
49 This variable contains the command which can be used to compute the
50 host name. The command is fully qualified by its absolute path, to make
51 it safe when used by a process with super-user privileges.
52
ff935051
JH
53api_revision (patchlevel.U):
54 The three variables, api_revision, api_version, and
55 api_subversion, specify the version of the oldest perl binary
56 compatible with the present perl. In a full version string
57 such as '5.6.1', api_revision is the '5'.
58 Prior to 5.5.640, the format was a floating point number,
59 like 5.00563.
9c20e9bc
JH
60
61 perl.c:incpush() and lib/lib.pm will automatically search in
ff935051
JH
62 $sitelib/.. for older directories back to the limit specified
63 by these api_ variables. This is only useful if you have a
64 perl library directory tree structured like the default one.
65 See INSTALL for how this works. The versioned site_perl
66 directory was introduced in 5.005, so that is the lowest
67 possible value. The version list appropriate for the current
68 system is determined in inc_version_list.U.
9c20e9bc
JH
69
70 XXX To do: Since compatibility can depend on compile time
08e5223a 71 options (such as bincompat, longlong, etc.) it should
ff935051
JH
72 (perhaps) be set by Configure, but currently it isn't.
73 Currently, we read a hard-wired value from patchlevel.h.
74 Perhaps what we ought to do is take the hard-wired value from
75 patchlevel.h but then modify it if the current Configure
76 options warrant. patchlevel.h then would use an #ifdef guard.
77
78api_subversion (patchlevel.U):
79 The three variables, api_revision, api_version, and
80 api_subversion, specify the version of the oldest perl binary
81 compatible with the present perl. In a full version string
82 such as '5.6.1', api_subversion is the '1'. See api_revision for
83 full details.
84
85api_version (patchlevel.U):
86 The three variables, api_revision, api_version, and
87 api_subversion, specify the version of the oldest perl binary
88 compatible with the present perl. In a full version string
89 such as '5.6.1', api_version is the '6'. See api_revision for
90 full details. As a special case, 5.5.0 is rendered in the
91 old-style as 5.005. (In the 5.005_0x maintenance series,
92 this was the only versioned directory in $sitelib.)
93
94api_versionstring (patchlevel.U):
95 This variable combines api_revision, api_version, and
96 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
97 for use as a directory name. This is filesystem dependent.
781b178c
JH
98
99ar (Loc.U):
5bf26616 100 This variable is used internally by Configure to determine the
781b178c
JH
101 full pathname (if any) of the ar program. After Configure runs,
102 the value is reset to a plain "ar" and is not useful.
103
104archlib (archlib.U):
105 This variable holds the name of the directory in which the user wants
106 to put architecture-dependent public library files for $package.
107 It is most often a local directory such as /usr/local/lib.
108 Programs using this variable must be prepared to deal
109 with filename expansion.
110
111archlibexp (archlib.U):
112 This variable is the same as the archlib variable, but is
113 filename expanded at configuration time, for convenient use.
114
781b178c
JH
115archname (archname.U):
116 This variable is a short name to characterize the current
117 architecture. It is used mainly to construct the default archlib.
118
df4c34dc
MB
119archname64 (use64bits.U):
120 This variable is used for the 64-bitness part of $archname.
121
781b178c
JH
122archobjs (Unix.U):
123 This variable defines any additional objects that must be linked
124 in with the program on this architecture. On unix, it is usually
125 empty. It is typically used to include emulations of unix calls
126 or other facilities. For perl on OS/2, for example, this would
127 include os2/os2.obj.
128
10bc17b6
JH
129asctime_r_proto (d_asctime_r.U):
130 This variable encodes the prototype of asctime_r.
39183afa
JH
131 It is zero if d_asctime_r is undef, and one of the
132 REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r
133 is defined.
10bc17b6 134
781b178c 135awk (Loc.U):
5bf26616 136 This variable is used internally by Configure to determine the
781b178c
JH
137 full pathname (if any) of the awk program. After Configure runs,
138 the value is reset to a plain "awk" and is not useful.
139
140baserev (baserev.U):
141 The base revision level of this package, from the .package file.
142
143bash (Loc.U):
144 This variable is defined but not used by Configure.
fcdf39cf 145 The value is the empty string and is not useful.
781b178c
JH
146
147bin (bin.U):
148 This variable holds the name of the directory in which the user wants
149 to put publicly executable images for the package in question. It
150 is most often a local directory such as /usr/local/bin. Programs using
151 this variable must be prepared to deal with ~name substitution.
152
f1ce3bf1
MB
153bin_ELF (dlsrc.U):
154 This variable saves the result from configure if generated binaries
155 are in ELF format. Only set to defined when the test has actually
156 been performed, and the result was positive.
157
781b178c
JH
158binexp (bin.U):
159 This is the same as the bin variable, but is filename expanded at
160 configuration time, for use in your makefiles.
161
162bison (Loc.U):
2d967e39
JH
163 This variable is used internally by Configure to determine the
164 full pathname (if any) of the bison program. After Configure runs,
165 the value is reset to a plain "bison" and is not useful.
781b178c
JH
166
167byacc (Loc.U):
5bf26616 168 This variable is used internally by Configure to determine the
781b178c
JH
169 full pathname (if any) of the byacc program. After Configure runs,
170 the value is reset to a plain "byacc" and is not useful.
171
172byteorder (byteorder.U):
24412007
JH
173 This variable holds the byte order in a UV. In the following,
174 larger digits indicate more significance. The variable byteorder
175 is either 4321 on a big-endian machine, or 1234 on a little-endian,
176 or 87654321 on a Cray ... or 3412 with weird order !
781b178c
JH
177
178c (n.U):
179 This variable contains the \c string if that is what causes the echo
180 command to suppress newline. Otherwise it is null. Correct usage is
181 $echo $n "prompt for a question: $c".
182
183castflags (d_castneg.U):
184 This variable contains a flag that precise difficulties the
185 compiler has casting odd floating values to unsigned long:
186 0 = ok
187 1 = couldn't cast < 0
188 2 = couldn't cast >= 0x80000000
189 4 = couldn't cast in argument expression list
190
191cat (Loc.U):
5bf26616 192 This variable is used internally by Configure to determine the
781b178c
JH
193 full pathname (if any) of the cat program. After Configure runs,
194 the value is reset to a plain "cat" and is not useful.
195
196cc (cc.U):
197 This variable holds the name of a command to execute a C compiler which
198 can resolve multiple global references that happen to have the same
5869b1f1
JH
199 name. Usual values are 'cc' and 'gcc'.
200 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
781b178c
JH
201
202cccdlflags (dlsrc.U):
203 This variable contains any special flags that might need to be
204 passed with 'cc -c' to compile modules to be used to create a shared
205 library that will be used for dynamic loading. For hpux, this
206 should be +z. It is up to the makefile to use it.
207
208ccdlflags (dlsrc.U):
209 This variable contains any special flags that might need to be
210 passed to cc to link with a shared library for dynamic loading.
211 It is up to the makefile to use it. For sunos 4.1, it should
212 be empty.
213
214ccflags (ccflags.U):
215 This variable contains any additional C compiler flags desired by
216 the user. It is up to the Makefile to use this.
217
af960fef
JH
218ccflags_uselargefiles (uselfs.U):
219 This variable contains the compiler flags needed by large file builds
220 and added to ccflags by hints files.
221
6b356c8e
JH
222ccname (Checkcc.U):
223 This can set either by hints files or by Configure. If using
224 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
225 Some platforms, however, make good use of this by storing the
226 flavor of the C compiler being used here. For example if using
227 the Sun WorkShop suite, ccname will be 'workshop'.
228
781b178c
JH
229ccsymbols (Cppsym.U):
230 The variable contains the symbols defined by the C compiler alone.
52c7d5b6
JH
231 The symbols defined by cpp or by cc when it calls cpp are not in
232 this list, see cppsymbols and cppccsymbols.
781b178c
JH
233 The list is a space-separated list of symbol=value tokens.
234
6b356c8e
JH
235ccversion (Checkcc.U):
236 This can set either by hints files or by Configure. If using
237 a (non-gcc) vendor cc, this variable may contain a version for
238 the compiler.
239
781b178c
JH
240cf_by (cf_who.U):
241 Login name of the person who ran the Configure script and answered the
242 questions. This is used to tag both config.sh and config_h.SH.
243
244cf_email (cf_email.U):
245 Electronic mail address of the person who ran Configure. This can be
246 used by units that require the user's e-mail, like MailList.U.
247
248cf_time (cf_who.U):
249 Holds the output of the "date" command when the configuration file was
250 produced. This is used to tag both config.sh and config_h.SH.
251
c193ef60
MB
252charbits (charsize.U):
253 This variable contains the value of the CHARBITS symbol, which
254 indicates to the C program how many bits there are in a character.
255
256charsize (charsize.U):
257 This variable contains the value of the CHARSIZE symbol, which
258 indicates to the C program how many bytes there are in a character.
259
781b178c
JH
260chgrp (Loc.U):
261 This variable is defined but not used by Configure.
fcdf39cf 262 The value is the empty string and is not useful.
781b178c
JH
263
264chmod (Loc.U):
2765b840
JH
265 This variable is used internally by Configure to determine the
266 full pathname (if any) of the chmod program. After Configure runs,
267 the value is reset to a plain "chmod" and is not useful.
781b178c
JH
268
269chown (Loc.U):
270 This variable is defined but not used by Configure.
fcdf39cf 271 The value is the empty string and is not useful.
781b178c
JH
272
273clocktype (d_times.U):
274 This variable holds the type returned by times(). It can be long,
275 or clock_t on BSD sites (in which case <sys/types.h> should be
276 included).
277
278comm (Loc.U):
5bf26616 279 This variable is used internally by Configure to determine the
781b178c
JH
280 full pathname (if any) of the comm program. After Configure runs,
281 the value is reset to a plain "comm" and is not useful.
282
283compress (Loc.U):
284 This variable is defined but not used by Configure.
fcdf39cf 285 The value is the empty string and is not useful.
781b178c 286
ecf5c238
AD
287config_arg0 (Options.U):
288 This variable contains the string used to invoke the Configure
289 command, as reported by the shell in the $0 variable.
290
291config_argc (Options.U):
47e01c32 292 This variable contains the number of command-line arguments
ecf5c238 293 passed to Configure, as reported by the shell in the $# variable.
269a7913
MB
294 The individual arguments are stored as variables config_arg1,
295 config_arg2, etc.
ecf5c238
AD
296
297config_args (Options.U):
298 This variable contains a single string giving the command-line
299 arguments passed to Configure. Spaces within arguments,
300 quotes, and escaped characters are not correctly preserved.
301 To reconstruct the command line, you must assemble the individual
302 command line pieces, given in config_arg[0-9]*.
303
781b178c
JH
304contains (contains.U):
305 This variable holds the command to do a grep with a proper return
306 status. On most sane systems it is simply "grep". On insane systems
307 it is a grep followed by a cat followed by a test. This variable
308 is primarily for the use of other Configure units.
309
310cp (Loc.U):
5bf26616 311 This variable is used internally by Configure to determine the
781b178c
JH
312 full pathname (if any) of the cp program. After Configure runs,
313 the value is reset to a plain "cp" and is not useful.
314
315cpio (Loc.U):
316 This variable is defined but not used by Configure.
fcdf39cf 317 The value is the empty string and is not useful.
781b178c
JH
318
319cpp (Loc.U):
5bf26616 320 This variable is used internally by Configure to determine the
781b178c
JH
321 full pathname (if any) of the cpp program. After Configure runs,
322 the value is reset to a plain "cpp" and is not useful.
323
324cpp_stuff (cpp_stuff.U):
505656d3 325 This variable contains an identification of the concatenation mechanism
781b178c
JH
326 used by the C preprocessor.
327
328cppccsymbols (Cppsym.U):
52c7d5b6
JH
329 The variable contains the symbols defined by the C compiler
330 when it calls cpp. The symbols defined by the cc alone or cpp
331 alone are not in this list, see ccsymbols and cppsymbols.
781b178c
JH
332 The list is a space-separated list of symbol=value tokens.
333
334cppflags (ccflags.U):
335 This variable holds the flags that will be passed to the C pre-
336 processor. It is up to the Makefile to use it.
337
338cpplast (cppstdin.U):
339 This variable has the same functionality as cppminus, only it applies
340 to cpprun and not cppstdin.
341
342cppminus (cppstdin.U):
343 This variable contains the second part of the string which will invoke
344 the C preprocessor on the standard input and produce to standard
345 output. This variable will have the value "-" if cppstdin needs
346 a minus to specify standard input, otherwise the value is "".
347
348cpprun (cppstdin.U):
349 This variable contains the command which will invoke a C preprocessor
350 on standard input and put the output to stdout. It is guaranteed not
351 to be a wrapper and may be a null string if no preprocessor can be
352 made directly available. This preprocessor might be different from the
353 one used by the C compiler. Don't forget to append cpplast after the
354 preprocessor options.
355
356cppstdin (cppstdin.U):
357 This variable contains the command which will invoke the C
358 preprocessor on standard input and put the output to stdout.
359 It is primarily used by other Configure units that ask about
360 preprocessor symbols.
361
362cppsymbols (Cppsym.U):
52c7d5b6
JH
363 The variable contains the symbols defined by the C preprocessor
364 alone. The symbols defined by cc or by cc when it calls cpp are
365 not in this list, see ccsymbols and cppccsymbols.
781b178c
JH
366 The list is a space-separated list of symbol=value tokens.
367
10bc17b6
JH
368crypt_r_proto (d_crypt_r.U):
369 This variable encodes the prototype of crypt_r.
39183afa
JH
370 It is zero if d_crypt_r is undef, and one of the
371 REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r
372 is defined.
10bc17b6 373
781b178c
JH
374cryptlib (d_crypt.U):
375 This variable holds -lcrypt or the path to a libcrypt.a archive if
376 the crypt() function is not defined in the standard C library. It is
377 up to the Makefile to use this.
378
379csh (Loc.U):
5bf26616 380 This variable is used internally by Configure to determine the
781b178c
JH
381 full pathname (if any) of the csh program. After Configure runs,
382 the value is reset to a plain "csh" and is not useful.
383
10bc17b6
JH
384ctermid_r_proto (d_ctermid_r.U):
385 This variable encodes the prototype of ctermid_r.
39183afa
JH
386 It is zero if d_ctermid_r is undef, and one of the
387 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r
388 is defined.
10bc17b6
JH
389
390ctime_r_proto (d_ctime_r.U):
391 This variable encodes the prototype of ctime_r.
39183afa
JH
392 It is zero if d_ctime_r is undef, and one of the
393 REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r
394 is defined.
10bc17b6 395
74cac757
JH
396d__fwalk (d__fwalk.U):
397 This variable conditionally defines HAS__FWALK if _fwalk() is
398 available to apply a function to all the file handles.
399
781b178c
JH
400d_access (d_access.U):
401 This variable conditionally defines HAS_ACCESS if the access() system
402 call is available to check for access permissions using real IDs.
403
404d_accessx (d_accessx.U):
405 This variable conditionally defines the HAS_ACCESSX symbol, which
406 indicates to the C program that the accessx() routine is available.
407
40613a90
JH
408d_acosh (d_acosh.U):
409 This variable conditionally defines the HAS_ACOSH symbol, which
410 indicates to the C program that the acosh() routine is available.
411
5c567d7d
JH
412d_aintl (d_aintl.U):
413 This variable conditionally defines the HAS_AINTL symbol, which
414 indicates to the C program that the aintl() routine is available.
415 If copysignl is also present we can emulate modfl.
416
781b178c
JH
417d_alarm (d_alarm.U):
418 This variable conditionally defines the HAS_ALARM symbol, which
419 indicates to the C program that the alarm() routine is available.
420
421d_archlib (archlib.U):
422 This variable conditionally defines ARCHLIB to hold the pathname
423 of architecture-dependent library files for $package. If
424 $archlib is the same as $privlib, then this is set to undef.
425
96938616
MB
426d_asctime64 (d_timefuncs64.U):
427 This variable conditionally defines the HAS_ASCTIME64 symbol, which
428 indicates to the C program that the asctime64 () routine is available.
429
10bc17b6
JH
430d_asctime_r (d_asctime_r.U):
431 This variable conditionally defines the HAS_ASCTIME_R symbol,
432 which indicates to the C program that the asctime_r()
433 routine is available.
434
427d28ce
JH
435d_asinh (d_asinh.U):
436 This variable conditionally defines the HAS_ASINH symbol, which
437 indicates to the C program that the asinh() routine is available.
438
439d_atanh (d_atanh.U):
440 This variable conditionally defines the HAS_ATANH symbol, which
441 indicates to the C program that the atanh() routine is available.
442
11dc3f68
JH
443d_atolf (atolf.U):
444 This variable conditionally defines the HAS_ATOLF symbol, which
445 indicates to the C program that the atolf() routine is available.
446
447d_atoll (atoll.U):
448 This variable conditionally defines the HAS_ATOLL symbol, which
449 indicates to the C program that the atoll() routine is available.
450
fcdf39cf
RGS
451d_attribute_deprecated (d_attribut.U):
452 This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
453 indicates that GCC can handle the attribute for marking deprecated
454 APIs
455
df4c34dc 456d_attribute_format (d_attribut.U):
0dbb1585
AL
457 This variable conditionally defines HASATTRIBUTE_FORMAT, which
458 indicates the C compiler can check for printf-like formats.
459
df4c34dc 460d_attribute_malloc (d_attribut.U):
0dbb1585
AL
461 This variable conditionally defines HASATTRIBUTE_MALLOC, which
462 indicates the C compiler can understand functions as having
463 malloc-like semantics.
464
df4c34dc 465d_attribute_nonnull (d_attribut.U):
0dbb1585
AL
466 This variable conditionally defines HASATTRIBUTE_NONNULL, which
467 indicates that the C compiler can know that certain arguments
468 must not be NULL, and will check accordingly at compile time.
469
df4c34dc 470d_attribute_noreturn (d_attribut.U):
0dbb1585
AL
471 This variable conditionally defines HASATTRIBUTE_NORETURN, which
472 indicates that the C compiler can know that certain functions
473 are guaranteed never to return.
474
df4c34dc 475d_attribute_pure (d_attribut.U):
0dbb1585
AL
476 This variable conditionally defines HASATTRIBUTE_PURE, which
477 indicates that the C compiler can know that certain functions
478 are "pure" functions, meaning that they have no side effects, and
479 only rely on function input and/or global data for their results.
480
df4c34dc 481d_attribute_unused (d_attribut.U):
0dbb1585
AL
482 This variable conditionally defines HASATTRIBUTE_UNUSED, which
483 indicates that the C compiler can know that certain variables
484 and arguments may not always be used, and to not throw warnings
485 if they don't get used.
486
df4c34dc 487d_attribute_warn_unused_result (d_attribut.U):
0dbb1585
AL
488 This variable conditionally defines
489 HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
490 compiler can know that certain functions have a return values
491 that must not be ignored, such as malloc() or open().
781b178c 492
f6a82ade
MB
493d_backtrace (d_backtrace.U):
494 This variable conditionally defines the HAS_BACKTRACE symbol, which
495 indicates to the C program that the backtrace() routine is available
496 to get a stack trace.
497
781b178c
JH
498d_bcmp (d_bcmp.U):
499 This variable conditionally defines the HAS_BCMP symbol if
500 the bcmp() routine is available to compare strings.
501
502d_bcopy (d_bcopy.U):
503 This variable conditionally defines the HAS_BCOPY symbol if
504 the bcopy() routine is available to copy strings.
505
506d_bsd (Guess.U):
507 This symbol conditionally defines the symbol BSD when running on a
508 BSD system.
509
510d_bsdgetpgrp (d_getpgrp.U):
511 This variable conditionally defines USE_BSD_GETPGRP if
512 getpgrp needs one arguments whereas USG one needs none.
513
514d_bsdsetpgrp (d_setpgrp.U):
515 This variable conditionally defines USE_BSD_SETPGRP if
516 setpgrp needs two arguments whereas USG one needs none.
517 See also d_setpgid for a POSIX interface.
518
635aebb7
AL
519d_builtin_choose_expr (d_builtin.U):
520 This conditionally defines HAS_BUILTIN_CHOOSE_EXPR, which
521 indicates that the compiler supports __builtin_choose_expr(x,y,z).
522 This built-in function is analogous to the "x?y:z" operator in C,
523 except that the expression returned has its type unaltered by
524 promotion rules. Also, the built-in function does not evaluate
525 the expression that was not chosen.
526
527d_builtin_expect (d_builtin.U):
528 This conditionally defines HAS_BUILTIN_EXPECT, which indicates
529 that the compiler supports __builtin_expect(exp,c). You may use
530 __builtin_expect to provide the compiler with branch prediction
531 information.
532
781b178c
JH
533d_bzero (d_bzero.U):
534 This variable conditionally defines the HAS_BZERO symbol if
535 the bzero() routine is available to set memory to 0.
536
a2d23ec2
MB
537d_c99_variadic_macros (d_c99_variadic.U):
538 This variable conditionally defines the HAS_C99_VARIADIC_MACROS
539 symbol, which indicates to the C program that C99 variadic macros
540 are available.
541
781b178c
JH
542d_casti32 (d_casti32.U):
543 This variable conditionally defines CASTI32, which indicates
544 whether the C compiler can cast large floats to 32-bit ints.
545
546d_castneg (d_castneg.U):
547 This variable conditionally defines CASTNEG, which indicates
47e01c32 548 whether the C compiler can cast negative float to unsigned.
781b178c 549
427d28ce
JH
550d_cbrt (d_cbrt.U):
551 This variable conditionally defines the HAS_CBRT symbol, which
f40bbcbf
MB
552 indicates to the C program that the cbrt() (cube root) function
553 is available.
427d28ce 554
781b178c
JH
555d_charvspr (d_vprintf.U):
556 This variable conditionally defines CHARVSPRINTF if this system
557 has vsprintf returning type (char*). The trend seems to be to
558 declare it as "int vsprintf()".
559
560d_chown (d_chown.U):
561 This variable conditionally defines the HAS_CHOWN symbol, which
562 indicates to the C program that the chown() routine is available.
563
564d_chroot (d_chroot.U):
565 This variable conditionally defines the HAS_CHROOT symbol, which
566 indicates to the C program that the chroot() routine is available.
567
568d_chsize (d_chsize.U):
569 This variable conditionally defines the CHSIZE symbol, which
570 indicates to the C program that the chsize() routine is available
571 to truncate files. You might need a -lx to get this routine.
572
758a5d79
JH
573d_class (d_class.U):
574 This variable conditionally defines the HAS_CLASS symbol, which
575 indicates to the C program that the class() routine is available.
576
b0a2e8e6
MB
577d_clearenv (d_clearenv.U):
578 This variable conditionally defines the HAS_CLEARENV symbol, which
579 indicates to the C program that the clearenv () routine is available.
580
781b178c
JH
581d_closedir (d_closedir.U):
582 This variable conditionally defines HAS_CLOSEDIR if closedir() is
583 available.
584
4e0554ec
JH
585d_cmsghdr_s (d_cmsghdr_s.U):
586 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
587 which indicates that the struct cmsghdr is supported.
588
781b178c
JH
589d_const (d_const.U):
590 This variable conditionally defines the HASCONST symbol, which
591 indicates to the C program that this C compiler knows about the
592 const type.
593
f40bbcbf
MB
594d_copysign (d_copysign.U):
595 This variable conditionally defines the HAS_COPYSIGN symbol, which
596 indicates to the C program that the copysign() routine is available.
597
5c567d7d
JH
598d_copysignl (d_copysignl.U):
599 This variable conditionally defines the HAS_COPYSIGNL symbol, which
600 indicates to the C program that the copysignl() routine is available.
601 If aintl is also present we can emulate modfl.
602
f244a502
JH
603d_cplusplus (d_cplusplus.U):
604 This variable conditionally defines the USE_CPLUSPLUS symbol, which
605 indicates that a C++ compiler was used to compiled Perl and will be
606 used to compile extensions.
607
781b178c
JH
608d_crypt (d_crypt.U):
609 This variable conditionally defines the CRYPT symbol, which
610 indicates to the C program that the crypt() routine is available
611 to encrypt passwords and the like.
612
10bc17b6
JH
613d_crypt_r (d_crypt_r.U):
614 This variable conditionally defines the HAS_CRYPT_R symbol,
615 which indicates to the C program that the crypt_r()
616 routine is available.
617
781b178c
JH
618d_csh (d_csh.U):
619 This variable conditionally defines the CSH symbol, which
620 indicates to the C program that the C-shell exists.
621
066e7355
MB
622d_ctermid (d_ctermid.U):
623 This variable conditionally defines CTERMID if ctermid() is
624 available to generate filename for terminal.
625
10bc17b6
JH
626d_ctermid_r (d_ctermid_r.U):
627 This variable conditionally defines the HAS_CTERMID_R symbol,
628 which indicates to the C program that the ctermid_r()
629 routine is available.
630
96938616
MB
631d_ctime64 (d_timefuncs64.U):
632 This variable conditionally defines the HAS_CTIME64 symbol, which
633 indicates to the C program that the ctime64 () routine is available.
634
10bc17b6
JH
635d_ctime_r (d_ctime_r.U):
636 This variable conditionally defines the HAS_CTIME_R symbol,
637 which indicates to the C program that the ctime_r()
638 routine is available.
639
781b178c
JH
640d_cuserid (d_cuserid.U):
641 This variable conditionally defines the HAS_CUSERID symbol, which
642 indicates to the C program that the cuserid() routine is available
643 to get character login names.
644
645d_dbl_dig (d_dbl_dig.U):
646 This variable conditionally defines d_dbl_dig if this system's
647 header files provide DBL_DIG, which is the number of significant
648 digits in a double precision number.
649
5af95cda
JH
650d_dbminitproto (d_dbminitproto.U):
651 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
652 which indicates to the C program that the system provides
653 a prototype for the dbminit() function. Otherwise, it is
654 up to the program to supply one.
655
781b178c
JH
656d_difftime (d_difftime.U):
657 This variable conditionally defines the HAS_DIFFTIME symbol, which
658 indicates to the C program that the difftime() routine is available.
659
96938616
MB
660d_difftime64 (d_timefuncs64.U):
661 This variable conditionally defines the HAS_DIFFTIME64 symbol, which
662 indicates to the C program that the difftime64 () routine is available.
663
066e7355 664d_dir_dd_fd (d_dir_dd_fd.U):
de52168c
SP
665 This variable conditionally defines the HAS_DIR_DD_FD symbol, which
666 indicates that the DIR directory stream type contains a member
667 variable called dd_fd.
668
428dc699
JH
669d_dirfd (d_dirfd.U):
670 This variable conditionally defines the HAS_DIRFD constant,
671 which indicates to the C program that dirfd() is available
672 to return the file descriptor of a directory stream.
673
781b178c
JH
674d_dirnamlen (i_dirent.U):
675 This variable conditionally defines DIRNAMLEN, which indicates
676 to the C program that the length of directory entry names is
677 provided by a d_namelen field.
678
f6a82ade
MB
679d_dladdr (d_dladdr.U):
680 This variable conditionally defines the HAS_DLADDR symbol, which
681 indicates to the C program that the dladdr() routine is available
682 to get a stack trace.
683
781b178c
JH
684d_dlerror (d_dlerror.U):
685 This variable conditionally defines the HAS_DLERROR symbol, which
686 indicates to the C program that the dlerror() routine is available.
687
688d_dlopen (d_dlopen.U):
689 This variable conditionally defines the HAS_DLOPEN symbol, which
690 indicates to the C program that the dlopen() routine is available.
691
692d_dlsymun (d_dlsymun.U):
693 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
694 indicates that we need to prepend an underscore to the symbol
695 name before calling dlsym().
696
4cb05021
JH
697d_double_has_inf (infnan.U):
698 This variable conditionally defines the symbol DOUBLE_HAS_INF
699 which indicates that the double type has an infinity.
700
701d_double_has_nan (infnan.U):
702 This variable conditionally defines the symbol DOUBLE_HAS_INF
703 which indicates that the double type has a not-a-number.
704
705d_double_has_negative_zero (infnan.U):
706 This variable conditionally defines the symbol DOUBLE_HAS_NEGATIVE_ZERO
707 which indicates that the double type has a negative zero.
708
709d_double_has_subnormals (infnan.U):
710 This variable conditionally defines the symbol DOUBLE_HAS_SUBNORMALS
711 which indicates that the double type has subnormals (denormals).
712
713d_double_style_cray (longdblfio.U):
714 This variable conditionally defines the symbol DOUBLE_STYLE_CRAY
715 which indicates that the double is the 64-bit CRAY mainframe format.
716
717d_double_style_ibm (longdblfio.U):
718 This variable conditionally defines the symbol DOUBLE_STYLE_IBM,
719 which indicates that the double is the 64-bit IBM mainframe format.
720
721d_double_style_ieee (longdblfio.U):
722 This variable conditionally defines the symbol DOUBLE_STYLE_IEEE,
723 which indicates that the double is the 64-bit IEEE 754.
724
725d_double_style_vax (longdblfio.U):
726 This variable conditionally defines the symbol DOUBLE_STYLE_VAX,
727 which indicates that the double is the 64-bit VAX format D or G.
728
781b178c
JH
729d_dosuid (d_dosuid.U):
730 This variable conditionally defines the symbol DOSUID, which
731 tells the C program that it should insert setuid emulation code
732 on hosts which have setuid #! scripts disabled.
733
10bc17b6
JH
734d_drand48_r (d_drand48_r.U):
735 This variable conditionally defines the HAS_DRAND48_R symbol,
736 which indicates to the C program that the drand48_r()
737 routine is available.
738
781b178c
JH
739d_drand48proto (d_drand48proto.U):
740 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
741 which indicates to the C program that the system provides
742 a prototype for the drand48() function. Otherwise, it is
743 up to the program to supply one.
744
745d_dup2 (d_dup2.U):
746 This variable conditionally defines HAS_DUP2 if dup2() is
747 available to duplicate file descriptors.
748
7e69463d
AC
749d_duplocale (d_newlocale.U):
750 This variable conditionally defines the HAS_DUPLOCALE symbol, which
751 indicates to the C program that the duplocale() routine is available
752 to duplicate a locale object.
753
781b178c
JH
754d_eaccess (d_eaccess.U):
755 This variable conditionally defines the HAS_EACCESS symbol, which
756 indicates to the C program that the eaccess() routine is available.
757
758d_endgrent (d_endgrent.U):
759 This variable conditionally defines the HAS_ENDGRENT symbol, which
760 indicates to the C program that the endgrent() routine is available
761 for sequential access of the group database.
762
10bc17b6
JH
763d_endgrent_r (d_endgrent_r.U):
764 This variable conditionally defines the HAS_ENDGRENT_R symbol,
765 which indicates to the C program that the endgrent_r()
766 routine is available.
767
781b178c
JH
768d_endhent (d_endhent.U):
769 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
770 available to close whatever was being used for host queries.
771
10bc17b6
JH
772d_endhostent_r (d_endhostent_r.U):
773 This variable conditionally defines the HAS_ENDHOSTENT_R symbol,
774 which indicates to the C program that the endhostent_r()
775 routine is available.
776
781b178c
JH
777d_endnent (d_endnent.U):
778 This variable conditionally defines HAS_ENDNETENT if endnetent() is
779 available to close whatever was being used for network queries.
780
10bc17b6
JH
781d_endnetent_r (d_endnetent_r.U):
782 This variable conditionally defines the HAS_ENDNETENT_R symbol,
783 which indicates to the C program that the endnetent_r()
784 routine is available.
785
781b178c
JH
786d_endpent (d_endpent.U):
787 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
788 available to close whatever was being used for protocol queries.
789
10bc17b6
JH
790d_endprotoent_r (d_endprotoent_r.U):
791 This variable conditionally defines the HAS_ENDPROTOENT_R symbol,
792 which indicates to the C program that the endprotoent_r()
793 routine is available.
794
781b178c
JH
795d_endpwent (d_endpwent.U):
796 This variable conditionally defines the HAS_ENDPWENT symbol, which
797 indicates to the C program that the endpwent() routine is available
798 for sequential access of the passwd database.
799
10bc17b6
JH
800d_endpwent_r (d_endpwent_r.U):
801 This variable conditionally defines the HAS_ENDPWENT_R symbol,
802 which indicates to the C program that the endpwent_r()
803 routine is available.
804
781b178c
JH
805d_endsent (d_endsent.U):
806 This variable conditionally defines HAS_ENDSERVENT if endservent() is
807 available to close whatever was being used for service queries.
808
10bc17b6
JH
809d_endservent_r (d_endservent_r.U):
810 This variable conditionally defines the HAS_ENDSERVENT_R symbol,
811 which indicates to the C program that the endservent_r()
812 routine is available.
813
781b178c
JH
814d_eofnblk (nblock_io.U):
815 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
816 when reading from a non-blocking I/O source.
817
427d28ce
JH
818d_erf (d_erf.U):
819 This variable conditionally defines the HAS_ERF symbol, which
820 indicates to the C program that the erf() routine is available.
821
822d_erfc (d_erfc.U):
823 This variable conditionally defines the HAS_ERFC symbol, which
824 indicates to the C program that the erfc() routine is available.
825
781b178c
JH
826d_eunice (Guess.U):
827 This variable conditionally defines the symbols EUNICE and VAX, which
47e01c32 828 alerts the C program that it must deal with idiosyncrasies of VMS.
781b178c 829
427d28ce
JH
830d_exp2 (d_exp2.U):
831 This variable conditionally defines the HAS_EXP2 symbol, which
832 indicates to the C program that the exp2() routine is available.
833
834d_expm1 (d_expm1.U):
835 This variable conditionally defines the HAS_EXPM1 symbol, which
836 indicates to the C program that the expm1() routine is available.
837
4d54317a
JH
838d_faststdio (d_faststdio.U):
839 This variable conditionally defines the HAS_FAST_STDIO symbol,
840 which indicates to the C program that the "fast stdio" is available
841 to manipulate the stdio buffers directly.
842
b363b713
JH
843d_fchdir (d_fchdir.U):
844 This variable conditionally defines the HAS_FCHDIR symbol, which
845 indicates to the C program that the fchdir() routine is available.
846
781b178c
JH
847d_fchmod (d_fchmod.U):
848 This variable conditionally defines the HAS_FCHMOD symbol, which
849 indicates to the C program that the fchmod() routine is available
850 to change mode of opened files.
851
852d_fchown (d_fchown.U):
853 This variable conditionally defines the HAS_FCHOWN symbol, which
854 indicates to the C program that the fchown() routine is available
855 to change ownership of opened files.
856
857d_fcntl (d_fcntl.U):
858 This variable conditionally defines the HAS_FCNTL symbol, and indicates
859 whether the fcntl() function exists
860
9d9004a9
AD
861d_fcntl_can_lock (d_fcntl_can_lock.U):
862 This variable conditionally defines the FCNTL_CAN_LOCK symbol
863 and indicates whether file locking with fcntl() works.
864
781b178c
JH
865d_fd_macros (d_fd_set.U):
866 This variable contains the eventual value of the HAS_FD_MACROS symbol,
867 which indicates if your C compiler knows about the macros which
868 manipulate an fd_set.
869
870d_fd_set (d_fd_set.U):
871 This variable contains the eventual value of the HAS_FD_SET symbol,
872 which indicates if your C compiler knows about the fd_set typedef.
873
2640dfa8
MB
874d_fdclose (d_fdclose.U):
875 This variable conditionally defines the HAS_FDCLOSE symbol, which
876 indicates to the C program that the fdclose() routine is available.
877
f40bbcbf
MB
878d_fdim (d_fdim.U):
879 This variable conditionally defines the HAS_FDIM symbol, which
880 indicates to the C program that the fdim() routine is available.
881
781b178c
JH
882d_fds_bits (d_fd_set.U):
883 This variable contains the eventual value of the HAS_FDS_BITS symbol,
884 which indicates if your fd_set typedef contains the fds_bits member.
885 If you have an fd_set typedef, but the dweebs who installed it did
886 a half-fast job and neglected to provide the macros to manipulate
887 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
888
2f6b96eb
JH
889d_fegetround (d_fegetround.U):
890 This variable conditionally defines HAS_FEGETROUND if fegetround() is
891 available to get the floating point rounding mode.
892
781b178c
JH
893d_fgetpos (d_fgetpos.U):
894 This variable conditionally defines HAS_FGETPOS if fgetpos() is
895 available to get the file position indicator.
896
758a5d79
JH
897d_finite (d_finite.U):
898 This variable conditionally defines the HAS_FINITE symbol, which
899 indicates to the C program that the finite() routine is available.
900
901d_finitel (d_finitel.U):
902 This variable conditionally defines the HAS_FINITEL symbol, which
903 indicates to the C program that the finitel() routine is available.
904
781b178c
JH
905d_flexfnam (d_flexfnam.U):
906 This variable conditionally defines the FLEXFILENAMES symbol, which
907 indicates that the system supports filenames longer than 14 characters.
908
781b178c
JH
909d_flock (d_flock.U):
910 This variable conditionally defines HAS_FLOCK if flock() is
911 available to do file locking.
912
5af95cda
JH
913d_flockproto (d_flockproto.U):
914 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
915 which indicates to the C program that the system provides
916 a prototype for the flock() function. Otherwise, it is
917 up to the program to supply one.
918
427d28ce
JH
919d_fma (d_fma.U):
920 This variable conditionally defines the HAS_FMA symbol, which
921 indicates to the C program that the fma() routine is available.
922
923d_fmax (d_fmax.U):
924 This variable conditionally defines the HAS_FMAX symbol, which
925 indicates to the C program that the fmax() routine is available.
926
927d_fmin (d_fmin.U):
928 This variable conditionally defines the HAS_FMIN symbol, which
929 indicates to the C program that the fmin() routine is available.
930
781b178c
JH
931d_fork (d_fork.U):
932 This variable conditionally defines the HAS_FORK symbol, which
933 indicates to the C program that the fork() routine is available.
934
758a5d79
JH
935d_fp_class (d_fp_class.U):
936 This variable conditionally defines the HAS_FP_CLASS symbol, which
937 indicates to the C program that the fp_class() routine is available.
938
d0166596 939d_fp_classify (d_fpclassify.U):
add06237
JH
940 This variable conditionally defines the HAS_FP_CLASSIFY symbol, which
941 indicates to the C program that the fp_classify() routine is available.
942
d0166596
MB
943d_fp_classl (d_fp_classl.U):
944 This variable conditionally defines the HAS_FP_CLASSL symbol, which
945 indicates to the C program that the fp_classl() routine is available.
946
781b178c
JH
947d_fpathconf (d_pathconf.U):
948 This variable conditionally defines the HAS_FPATHCONF symbol, which
949 indicates to the C program that the pathconf() routine is available
950 to determine file-system related limits and options associated
951 with a given open file descriptor.
952
758a5d79
JH
953d_fpclass (d_fpclass.U):
954 This variable conditionally defines the HAS_FPCLASS symbol, which
955 indicates to the C program that the fpclass() routine is available.
956
957d_fpclassify (d_fpclassify.U):
958 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
959 indicates to the C program that the fpclassify() routine is available.
960
961d_fpclassl (d_fpclassl.U):
962 This variable conditionally defines the HAS_FPCLASSL symbol, which
963 indicates to the C program that the fpclassl() routine is available.
964
4c1a9b0c 965d_fpgetround (d_fpgetround.U):
d0166596
MB
966 This variable conditionally defines HAS_FPGETROUND if fpgetround()
967 is available to get the floating point rounding mode.
4c1a9b0c 968
c890dc6c 969d_fpos64_t (d_fpos64_t.U):
ca24dfc6 970 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 971
ecb44b8e
MB
972d_freelocale (d_newlocale.U):
973 This variable conditionally defines the HAS_FREELOCALE symbol, which
974 indicates to the C program that the freelocale() routine is available
975 to deallocates the resources associated with a locale object.
976
a3540c92
JH
977d_frexpl (d_frexpl.U):
978 This variable conditionally defines the HAS_FREXPL symbol, which
979 indicates to the C program that the frexpl() routine is available.
980
ea442100
JH
981d_fs_data_s (d_fs_data_s.U):
982 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
983 which indicates that the struct fs_data is supported.
984
781b178c
JH
985d_fseeko (d_fseeko.U):
986 This variable conditionally defines the HAS_FSEEKO symbol, which
987 indicates to the C program that the fseeko() routine is available.
988
781b178c
JH
989d_fsetpos (d_fsetpos.U):
990 This variable conditionally defines HAS_FSETPOS if fsetpos() is
991 available to set the file position indicator.
992
ea442100
JH
993d_fstatfs (d_fstatfs.U):
994 This variable conditionally defines the HAS_FSTATFS symbol, which
995 indicates to the C program that the fstatfs() routine is available.
996
997d_fstatvfs (d_statvfs.U):
998 This variable conditionally defines the HAS_FSTATVFS symbol, which
999 indicates to the C program that the fstatvfs() routine is available.
1000
411ab01c
JH
1001d_fsync (d_fsync.U):
1002 This variable conditionally defines the HAS_FSYNC symbol, which
1003 indicates to the C program that the fsync() routine is available.
1004
781b178c
JH
1005d_ftello (d_ftello.U):
1006 This variable conditionally defines the HAS_FTELLO symbol, which
1007 indicates to the C program that the ftello() routine is available.
1008
1009d_ftime (d_ftime.U):
1010 This variable conditionally defines the HAS_FTIME symbol, which indicates
1011 that the ftime() routine exists. The ftime() routine is basically
1012 a sub-second accuracy clock.
1013
df4c34dc 1014d_futimes (d_futimes.U):
dc814df1
MB
1015 This variable conditionally defines the HAS_FUTIMES symbol, which
1016 indicates to the C program that the futimes() routine is available.
1017
0cc74f39
MB
1018d_gai_strerror (d_gai_strerror.U):
1019 This variable conditionally defines the HAS_GAI_STRERROR symbol
1020 if the gai_strerror() routine is available and can be used to
1021 translate error codes returned by getaddrinfo() into human
1022 readable strings.
1023
4d54317a
JH
1024d_Gconvert (d_gconvert.U):
1025 This variable holds what Gconvert is defined as to convert
1026 floating point numbers into strings. By default, Configure
1027 sets this macro to use the first of gconvert, gcvt, or sprintf
1332606d 1028 that pass sprintf-%g-like behavior tests. If perl is using
4d54317a
JH
1029 long doubles, the macro uses the first of the following
1030 functions that pass Configure's tests: qgcvt, sprintf (if
1031 Configure knows how to make sprintf format long doubles--see
635aebb7
AL
1032 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
1033 The gconvert_preference and gconvert_ld_preference variables
4d54317a 1034 can be used to alter Configure's preferences, for doubles and
635aebb7
AL
1035 long doubles, respectively. If present, they contain a
1036 space-separated list of one or more of the above function
4d54317a
JH
1037 names in the order they should be tried.
1038
1039 d_Gconvert may be set to override Configure with a platform-
1040 specific function. If this function expects a double, a
1041 different value may need to be set by the uselongdouble.cbu
1042 call-back unit so that long doubles can be formatted without
1043 loss of precision.
1044
e74475c7
MHM
1045d_gdbm_ndbm_h_uses_prototypes (i_ndbm.U):
1046 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1047 which indicates that the gdbm-ndbm.h include file uses real ANSI C
1048 prototypes instead of K&R style function declarations. K&R style
1049 declarations are unsupported in C++, so the include file requires
1050 special handling when using a C++ compiler and this variable is
1051 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1052 to get the same information for alternative ndbm.h include files.
1053
1054d_gdbmndbm_h_uses_prototypes (i_ndbm.U):
1055 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1056 which indicates that the gdbm/ndbm.h include file uses real ANSI C
1057 prototypes instead of K&R style function declarations. K&R style
1058 declarations are unsupported in C++, so the include file requires
1059 special handling when using a C++ compiler and this variable is
1060 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1061 to get the same information for alternative ndbm.h include files.
1062
5086dff9
MB
1063d_getaddrinfo (d_getaddrinfo.U):
1064 This variable conditionally defines the HAS_GETADDRINFO symbol,
1065 which indicates to the C program that the getaddrinfo() function
1066 is available.
1067
49dabb45
JH
1068d_getcwd (d_getcwd.U):
1069 This variable conditionally defines the HAS_GETCWD symbol, which
1070 indicates to the C program that the getcwd() routine is available
1071 to get the current working directory.
1072
3813c136
JH
1073d_getespwnam (d_getespwnam.U):
1074 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
47e01c32 1075 available to retrieve enhanced (shadow) password entries by name.
3813c136 1076
ea442100
JH
1077d_getfsstat (d_getfsstat.U):
1078 This variable conditionally defines the HAS_GETFSSTAT symbol, which
1079 indicates to the C program that the getfsstat() routine is available.
1080
781b178c
JH
1081d_getgrent (d_getgrent.U):
1082 This variable conditionally defines the HAS_GETGRENT symbol, which
1083 indicates to the C program that the getgrent() routine is available
1084 for sequential access of the group database.
1085
10bc17b6
JH
1086d_getgrent_r (d_getgrent_r.U):
1087 This variable conditionally defines the HAS_GETGRENT_R symbol,
1088 which indicates to the C program that the getgrent_r()
1089 routine is available.
1090
1091d_getgrgid_r (d_getgrgid_r.U):
1092 This variable conditionally defines the HAS_GETGRGID_R symbol,
1093 which indicates to the C program that the getgrgid_r()
1094 routine is available.
1095
1096d_getgrnam_r (d_getgrnam_r.U):
1097 This variable conditionally defines the HAS_GETGRNAM_R symbol,
1098 which indicates to the C program that the getgrnam_r()
1099 routine is available.
1100
781b178c
JH
1101d_getgrps (d_getgrps.U):
1102 This variable conditionally defines the HAS_GETGROUPS symbol, which
1103 indicates to the C program that the getgroups() routine is available
1104 to get the list of process groups.
1105
1106d_gethbyaddr (d_gethbyad.U):
1107 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
1108 indicates to the C program that the gethostbyaddr() routine is available
1109 to look up hosts by their IP addresses.
1110
1111d_gethbyname (d_gethbynm.U):
1112 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
1113 indicates to the C program that the gethostbyname() routine is available
1114 to look up host names in some data base or other.
1115
1116d_gethent (d_gethent.U):
1117 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
1118 available to look up host names in some data base or another.
1119
1120d_gethname (d_gethname.U):
1121 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
1122 indicates to the C program that the gethostname() routine may be
1123 used to derive the host name.
1124
10bc17b6
JH
1125d_gethostbyaddr_r (d_gethostbyaddr_r.U):
1126 This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,
1127 which indicates to the C program that the gethostbyaddr_r()
1128 routine is available.
1129
1130d_gethostbyname_r (d_gethostbyname_r.U):
1131 This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,
1132 which indicates to the C program that the gethostbyname_r()
1133 routine is available.
1134
1135d_gethostent_r (d_gethostent_r.U):
1136 This variable conditionally defines the HAS_GETHOSTENT_R symbol,
1137 which indicates to the C program that the gethostent_r()
1138 routine is available.
1139
781b178c
JH
1140d_gethostprotos (d_gethostprotos.U):
1141 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
1142 which indicates to the C program that <netdb.h> supplies
635aebb7 1143 prototypes for the various gethost*() functions.
781b178c
JH
1144 See also netdbtype.U for probing for various netdb types.
1145
4e0554ec
JH
1146d_getitimer (d_getitimer.U):
1147 This variable conditionally defines the HAS_GETITIMER symbol, which
1148 indicates to the C program that the getitimer() routine is available.
1149
781b178c
JH
1150d_getlogin (d_getlogin.U):
1151 This variable conditionally defines the HAS_GETLOGIN symbol, which
1152 indicates to the C program that the getlogin() routine is available
1153 to get the login name.
1154
10bc17b6
JH
1155d_getlogin_r (d_getlogin_r.U):
1156 This variable conditionally defines the HAS_GETLOGIN_R symbol,
1157 which indicates to the C program that the getlogin_r()
1158 routine is available.
1159
ea442100
JH
1160d_getmnt (d_getmnt.U):
1161 This variable conditionally defines the HAS_GETMNT symbol, which
1162 indicates to the C program that the getmnt() routine is available
1163 to retrieve one or more mount info blocks by filename.
1164
1165d_getmntent (d_getmntent.U):
1166 This variable conditionally defines the HAS_GETMNTENT symbol, which
1167 indicates to the C program that the getmntent() routine is available
1168 to iterate through mounted files to get their mount info.
1169
5086dff9
MB
1170d_getnameinfo (d_getnameinfo.U):
1171 This variable conditionally defines the HAS_GETNAMEINFO symbol,
1172 which indicates to the C program that the getnameinfo() function
1173 is available.
1174
781b178c
JH
1175d_getnbyaddr (d_getnbyad.U):
1176 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
1177 indicates to the C program that the getnetbyaddr() routine is available
1178 to look up networks by their IP addresses.
1179
1180d_getnbyname (d_getnbynm.U):
1181 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
1182 indicates to the C program that the getnetbyname() routine is available
1183 to look up networks by their names.
1184
1185d_getnent (d_getnent.U):
1186 This variable conditionally defines HAS_GETNETENT if getnetent() is
1187 available to look up network names in some data base or another.
1188
10bc17b6
JH
1189d_getnetbyaddr_r (d_getnetbyaddr_r.U):
1190 This variable conditionally defines the HAS_GETNETBYADDR_R symbol,
1191 which indicates to the C program that the getnetbyaddr_r()
1192 routine is available.
1193
1194d_getnetbyname_r (d_getnetbyname_r.U):
1195 This variable conditionally defines the HAS_GETNETBYNAME_R symbol,
1196 which indicates to the C program that the getnetbyname_r()
1197 routine is available.
1198
1199d_getnetent_r (d_getnetent_r.U):
1200 This variable conditionally defines the HAS_GETNETENT_R symbol,
1201 which indicates to the C program that the getnetent_r()
1202 routine is available.
1203
781b178c
JH
1204d_getnetprotos (d_getnetprotos.U):
1205 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
1206 which indicates to the C program that <netdb.h> supplies
635aebb7 1207 prototypes for the various getnet*() functions.
781b178c
JH
1208 See also netdbtype.U for probing for various netdb types.
1209
0c0643d0
JH
1210d_getpagsz (d_getpagsz.U):
1211 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
1212 is available to get the system page size.
1213
781b178c 1214d_getpbyname (d_getprotby.U):
635aebb7
AL
1215 This variable conditionally defines the HAS_GETPROTOBYNAME
1216 symbol, which indicates to the C program that the
781b178c
JH
1217 getprotobyname() routine is available to look up protocols
1218 by their name.
1219
1220d_getpbynumber (d_getprotby.U):
635aebb7
AL
1221 This variable conditionally defines the HAS_GETPROTOBYNUMBER
1222 symbol, which indicates to the C program that the
781b178c
JH
1223 getprotobynumber() routine is available to look up protocols
1224 by their number.
1225
1226d_getpent (d_getpent.U):
1227 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
1228 available to look up protocols in some data base or another.
1229
1230d_getpgid (d_getpgid.U):
1231 This variable conditionally defines the HAS_GETPGID symbol, which
1232 indicates to the C program that the getpgid(pid) function
1233 is available to get the process group id.
1234
df4c34dc
MB
1235d_getpgrp (d_getpgrp.U):
1236 This variable conditionally defines HAS_GETPGRP if getpgrp() is
1237 available to get the current process group.
1238
781b178c
JH
1239d_getpgrp2 (d_getpgrp2.U):
1240 This variable conditionally defines the HAS_GETPGRP2 symbol, which
1241 indicates to the C program that the getpgrp2() (as in DG/UX) routine
1242 is available to get the current process group.
1243
781b178c
JH
1244d_getppid (d_getppid.U):
1245 This variable conditionally defines the HAS_GETPPID symbol, which
1246 indicates to the C program that the getppid() routine is available
1247 to get the parent process ID.
1248
1249d_getprior (d_getprior.U):
1250 This variable conditionally defines HAS_GETPRIORITY if getpriority()
1251 is available to get a process's priority.
1252
10bc17b6
JH
1253d_getprotobyname_r (d_getprotobyname_r.U):
1254 This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,
1255 which indicates to the C program that the getprotobyname_r()
1256 routine is available.
1257
1258d_getprotobynumber_r (d_getprotobynumber_r.U):
1259 This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,
1260 which indicates to the C program that the getprotobynumber_r()
1261 routine is available.
1262
1263d_getprotoent_r (d_getprotoent_r.U):
1264 This variable conditionally defines the HAS_GETPROTOENT_R symbol,
1265 which indicates to the C program that the getprotoent_r()
1266 routine is available.
1267
781b178c
JH
1268d_getprotoprotos (d_getprotoprotos.U):
1269 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
1270 which indicates to the C program that <netdb.h> supplies
635aebb7 1271 prototypes for the various getproto*() functions.
781b178c
JH
1272 See also netdbtype.U for probing for various netdb types.
1273
3813c136
JH
1274d_getprpwnam (d_getprpwnam.U):
1275 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
1276 available to retrieve protected (shadow) password entries by name.
1277
781b178c
JH
1278d_getpwent (d_getpwent.U):
1279 This variable conditionally defines the HAS_GETPWENT symbol, which
1280 indicates to the C program that the getpwent() routine is available
1281 for sequential access of the passwd database.
1282
10bc17b6
JH
1283d_getpwent_r (d_getpwent_r.U):
1284 This variable conditionally defines the HAS_GETPWENT_R symbol,
1285 which indicates to the C program that the getpwent_r()
1286 routine is available.
1287
1288d_getpwnam_r (d_getpwnam_r.U):
1289 This variable conditionally defines the HAS_GETPWNAM_R symbol,
1290 which indicates to the C program that the getpwnam_r()
1291 routine is available.
1292
1293d_getpwuid_r (d_getpwuid_r.U):
1294 This variable conditionally defines the HAS_GETPWUID_R symbol,
1295 which indicates to the C program that the getpwuid_r()
1296 routine is available.
1297
781b178c 1298d_getsbyname (d_getsrvby.U):
635aebb7
AL
1299 This variable conditionally defines the HAS_GETSERVBYNAME
1300 symbol, which indicates to the C program that the
781b178c
JH
1301 getservbyname() routine is available to look up services
1302 by their name.
1303
1304d_getsbyport (d_getsrvby.U):
635aebb7
AL
1305 This variable conditionally defines the HAS_GETSERVBYPORT
1306 symbol, which indicates to the C program that the
781b178c
JH
1307 getservbyport() routine is available to look up services
1308 by their port.
1309
1310d_getsent (d_getsent.U):
1311 This variable conditionally defines HAS_GETSERVENT if getservent() is
1312 available to look up network services in some data base or another.
1313
10bc17b6
JH
1314d_getservbyname_r (d_getservbyname_r.U):
1315 This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,
1316 which indicates to the C program that the getservbyname_r()
1317 routine is available.
1318
1319d_getservbyport_r (d_getservbyport_r.U):
1320 This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,
1321 which indicates to the C program that the getservbyport_r()
1322 routine is available.
1323
1324d_getservent_r (d_getservent_r.U):
1325 This variable conditionally defines the HAS_GETSERVENT_R symbol,
1326 which indicates to the C program that the getservent_r()
1327 routine is available.
1328
781b178c
JH
1329d_getservprotos (d_getservprotos.U):
1330 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
1331 which indicates to the C program that <netdb.h> supplies
635aebb7 1332 prototypes for the various getserv*() functions.
781b178c
JH
1333 See also netdbtype.U for probing for various netdb types.
1334
781b178c
JH
1335d_getspnam (d_getspnam.U):
1336 This variable conditionally defines HAS_GETSPNAM if getspnam() is
1337 available to retrieve SysV shadow password entries by name.
1338
10bc17b6
JH
1339d_getspnam_r (d_getspnam_r.U):
1340 This variable conditionally defines the HAS_GETSPNAM_R symbol,
1341 which indicates to the C program that the getspnam_r()
1342 routine is available.
1343
781b178c
JH
1344d_gettimeod (d_ftime.U):
1345 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
1346 indicates that the gettimeofday() system call exists (to obtain a
1347 sub-second accuracy clock). You should probably include <sys/resource.h>.
1348
96938616
MB
1349d_gmtime64 (d_timefuncs64.U):
1350 This variable conditionally defines the HAS_GMTIME64 symbol, which
1351 indicates to the C program that the gmtime64 () routine is available.
1352
10bc17b6
JH
1353d_gmtime_r (d_gmtime_r.U):
1354 This variable conditionally defines the HAS_GMTIME_R symbol,
1355 which indicates to the C program that the gmtime_r()
1356 routine is available.
1357
781b178c
JH
1358d_gnulibc (d_gnulibc.U):
1359 Defined if we're dealing with the GNU C Library.
1360
1361d_grpasswd (i_grp.U):
1362 This variable conditionally defines GRPASSWD, which indicates
1363 that struct group in <grp.h> contains gr_passwd.
1364
ea442100
JH
1365d_hasmntopt (d_hasmntopt.U):
1366 This variable conditionally defines the HAS_HASMNTOPT symbol, which
1367 indicates to the C program that the hasmntopt() routine is available
1368 to query the mount options of file systems.
1369
781b178c
JH
1370d_htonl (d_htonl.U):
1371 This variable conditionally defines HAS_HTONL if htonl() and its
1372 friends are available to do network order byte swapping.
1373
427d28ce
JH
1374d_hypot (d_hypot.U):
1375 This variable conditionally defines HAS_HYPOT if hypot is available
1376 for numerically stable hypotenuse function.
1377
1378d_ilogb (d_ilogb.U):
1379 This variable conditionally defines the HAS_ILOGB symbol, which
1380 indicates to the C program that the ilogb() routine is available
1381 for extracting the exponent of double x as a signed integer.
1382
5c567d7d
JH
1383d_ilogbl (d_ilogbl.U):
1384 This variable conditionally defines the HAS_ILOGBL symbol, which
427d28ce
JH
1385 indicates to the C program that the ilogbl() routine is available
1386 for extracting the exponent of long double x as a signed integer.
5c567d7d
JH
1387 If scalbnl is also present we can emulate frexpl.
1388
c95d0e17
GA
1389d_inc_version_list (inc_version_list.U):
1390 This variable conditionally defines PERL_INC_VERSION_LIST.
1391 It is set to undef when PERL_INC_VERSION_LIST is empty.
1392
781b178c
JH
1393d_index (d_strchr.U):
1394 This variable conditionally defines HAS_INDEX if index() and
1395 rindex() are available for string searching.
1396
1397d_inetaton (d_inetaton.U):
1398 This variable conditionally defines the HAS_INET_ATON symbol, which
1399 indicates to the C program that the inet_aton() function is available
1400 to parse IP address "dotted-quad" strings.
1401
5086dff9
MB
1402d_inetntop (d_inetntop.U):
1403 This variable conditionally defines the HAS_INETNTOP symbol,
1404 which indicates to the C program that the inet_ntop() function
1405 is available.
1406
1407d_inetpton (d_inetpton.U):
1408 This variable conditionally defines the HAS_INETPTON symbol,
1409 which indicates to the C program that the inet_pton() function
1410 is available.
1411
13b3f787 1412d_int64_t (d_int64_t.U):
781b178c
JH
1413 This symbol will be defined if the C compiler supports int64_t.
1414
122b9bf4
MB
1415d_ip_mreq (d_socket.U):
1416 This variable conditionally defines the HAS_IP_MREQ symbol, which
1417 indicates the availability of a struct ip_mreq.
1418
3e06601f
MB
1419d_ip_mreq_source (d_socket.U):
1420 This variable conditionally defines the HAS_IP_MREQ_SOURCE symbol,
1421 which indicates the availability of a struct ip_mreq_source.
1422
18126d98
MB
1423d_ipv6_mreq (d_socket.U):
1424 This variable conditionally defines the HAS_IPV6_MREQ symbol, which
1425 indicates the availability of a struct ipv6_mreq.
1426
3e06601f
MB
1427d_ipv6_mreq_source (d_socket.U):
1428 This variable conditionally defines the HAS_IPV6_MREQ_SOURCE symbol,
1429 which indicates the availability of a struct ipv6_mreq_source.
1430
781b178c
JH
1431d_isascii (d_isascii.U):
1432 This variable conditionally defines the HAS_ISASCII constant,
1433 which indicates to the C program that isascii() is available.
1434
269a7913
MB
1435d_isblank (d_isblank.U):
1436 This variable conditionally defines the HAS_ISBLANK constant,
1437 which indicates to the C program that isblank() is available.
1438
758a5d79
JH
1439d_isfinite (d_isfinite.U):
1440 This variable conditionally defines the HAS_ISFINITE symbol, which
1441 indicates to the C program that the isfinite() routine is available.
1442
fa484e60
JH
1443d_isfinitel (d_isfinitel.U):
1444 This variable conditionally defines the HAS_ISFINITEL symbol, which
1445 indicates to the C program that the isfinitel() routine is available.
1446
758a5d79
JH
1447d_isinf (d_isinf.U):
1448 This variable conditionally defines the HAS_ISINF symbol, which
1449 indicates to the C program that the isinf() routine is available.
1450
fa484e60
JH
1451d_isinfl (d_isinfl.U):
1452 This variable conditionally defines the HAS_ISINFL symbol, which
1453 indicates to the C program that the isinfl() routine is available.
1454
2640dfa8
MB
1455d_isless (d_isless.U):
1456 This variable conditionally defines the HAS_ISLESS symbol, which
1457 indicates to the C program that the isless() routine is available.
1458
a3540c92
JH
1459d_isnan (d_isnan.U):
1460 This variable conditionally defines the HAS_ISNAN symbol, which
1461 indicates to the C program that the isnan() routine is available.
1462
1463d_isnanl (d_isnanl.U):
1464 This variable conditionally defines the HAS_ISNANL symbol, which
1465 indicates to the C program that the isnanl() routine is available.
1466
f40bbcbf
MB
1467d_isnormal (d_isnormal.U):
1468 This variable conditionally defines the HAS_ISNORMAL symbol, which
1469 indicates to the C program that the isnormal() routine is available.
1470
4671125a 1471d_j0 (d_j0.U):
4671125a
JH
1472 This variable conditionally defines the HAS_J0 symbol, which
1473 indicates to the C program that the j0() routine is available.
1474
d0166596 1475d_j0l (d_j0.U):
4671125a
JH
1476 This variable conditionally defines the HAS_J0L symbol, which
1477 indicates to the C program that the j0l() routine is available.
1478
781b178c
JH
1479d_killpg (d_killpg.U):
1480 This variable conditionally defines the HAS_KILLPG symbol, which
1481 indicates to the C program that the killpg() routine is available
1482 to kill process groups.
1483
b15c1b56
AF
1484d_lc_monetary_2008 (d_lc_monetary_2008.U):
1485 This variable conditionally defines HAS_LC_MONETARY_2008 if libc
1486 has the international currency locale rules from POSIX
1487 1003.1-2008.
1488
781b178c
JH
1489d_lchown (d_lchown.U):
1490 This variable conditionally defines the HAS_LCHOWN symbol, which
1491 indicates to the C program that the lchown() routine is available
1492 to operate on a symbolic link (instead of following the link).
1493
ca24dfc6
LV
1494d_ldbl_dig (d_ldbl_dig.U):
1495 This variable conditionally defines d_ldbl_dig if this system's
1496 header files provide LDBL_DIG, which is the number of significant
1497 digits in a long double precision number.
1498
db8b8c75 1499d_ldexpl (d_longdbl.U):
688e39e5
JH
1500 This variable conditionally defines the HAS_LDEXPL symbol, which
1501 indicates to the C program that the ldexpl() routine is available.
1502
427d28ce
JH
1503d_lgamma (d_lgamma.U):
1504 This variable conditionally defines the HAS_LGAMMA symbol, which
1505 indicates to the C program that the lgamma() routine is available
f40bbcbf 1506 for the log gamma function. See also d_tgamma and d_lgamma_r.
427d28ce
JH
1507
1508d_lgamma_r (d_lgamma_r.U):
1509 This variable conditionally defines the HAS_LGAMMA_R symbol, which
f40bbcbf
MB
1510 indicates to the C program that the lgamma_r() routine is available
1511 for the log gamma function, without using the global signgam variable.
427d28ce 1512
df4c34dc
MB
1513d_libm_lib_version (d_libm_lib_version.U):
1514 This variable conditionally defines the LIBM_LIB_VERSION symbol,
1515 which indicates to the C program that math.h defines _LIB_VERSION
1516 being available in libm
1517
56b575b9
MB
1518d_libname_unique (so.U):
1519 This variable is defined if the target system insists on unique
1520 basenames for shared library files. This is currently true on Android,
1521 false everywhere else we know of.
1522 Defaults to 'undef'.
1523
781b178c
JH
1524d_link (d_link.U):
1525 This variable conditionally defines HAS_LINK if link() is
1526 available to create hard links.
1527
427d28ce
JH
1528d_llrint (d_llrint.U):
1529 This variable conditionally defines the HAS_LLRINT symbol, which
1530 indicates to the C program that the llrint() routine is available
2640dfa8
MB
1531 to return the long long value closest to a double (according
1532 to the current rounding mode).
427d28ce 1533
bc580dd3
JH
1534d_llrintl (d_llrintl.U):
1535 This variable conditionally defines the HAS_LLRINTL symbol, which
1536 indicates to the C program that the llrintl() routine is available
2640dfa8
MB
1537 to return the long long value closest to a long double (according
1538 to the current rounding mode).
bc580dd3 1539
427d28ce
JH
1540d_llround (d_llround.U):
1541 This variable conditionally defines the HAS_LLROUND symbol, which
1542 indicates to the C program that the llround() routine is available
f40bbcbf 1543 to return the long long value nearest to x.
427d28ce 1544
bc580dd3
JH
1545d_llroundl (d_llroundl.U):
1546 This variable conditionally defines the HAS_LLROUNDL symbol, which
1547 indicates to the C program that the llroundl() routine is available
2640dfa8 1548 to return the long long value nearest to x away from zero.
bc580dd3 1549
96938616
MB
1550d_localtime64 (d_timefuncs64.U):
1551 This variable conditionally defines the HAS_LOCALTIME64 symbol, which
1552 indicates to the C program that the localtime64 () routine is available.
1553
10bc17b6
JH
1554d_localtime_r (d_localtime_r.U):
1555 This variable conditionally defines the HAS_LOCALTIME_R symbol,
1556 which indicates to the C program that the localtime_r()
1557 routine is available.
1558
f025e94b
MB
1559d_localtime_r_needs_tzset (d_localtime_r.U):
1560 This variable conditionally defines the LOCALTIME_R_NEEDS_TZSET
1561 symbol, which makes us call tzset before localtime_r()
1562
781b178c
JH
1563d_locconv (d_locconv.U):
1564 This variable conditionally defines HAS_LOCALECONV if localeconv() is
1565 available for numeric and monetary formatting conventions.
1566
781b178c
JH
1567d_lockf (d_lockf.U):
1568 This variable conditionally defines HAS_LOCKF if lockf() is
1569 available to do file locking.
1570
427d28ce
JH
1571d_log1p (d_log1p.U):
1572 This variable conditionally defines the HAS_LOG1P symbol, which
1573 indicates to the C program that the logp1() routine is available
f40bbcbf 1574 to compute log(1 + x) for values of x close to zero.
427d28ce
JH
1575
1576d_log2 (d_log2.U):
1577 This variable conditionally defines the HAS_LOG2 symbol, which
1578 indicates to the C program that the log2() routine is available
f40bbcbf 1579 to compute log base two.
427d28ce
JH
1580
1581d_logb (d_logb.U):
1582 This variable conditionally defines the HAS_LOGB symbol, which
1583 indicates to the C program that the logb() routine is available
f40bbcbf 1584 to extract the exponent of x.
427d28ce 1585
781b178c 1586d_longdbl (d_longdbl.U):
635aebb7 1587 This variable conditionally defines HAS_LONG_DOUBLE if
781b178c
JH
1588 the long double type is supported.
1589
4cb05021
JH
1590d_long_double_style_ieee (d_longdbl.U):
1591 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE
1592 if the long double is any of the IEEE 754 style long doubles:
1593 LONG_DOUBLE_STYLE_IEEE_STD, LONG_DOUBLE_STYLE_IEEE_EXTENDED,
1594 LONG_DOUBLE_STYLE_IEEE_DOUBLEDOUBLE.
1595
1596d_long_double_style_ieee_doubledouble (d_longdbl.U):
1597 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_DOUBLEDOUBLE
1598 if the long double is the 128-bit IEEE 754 double-double.
1599
1600d_long_double_style_ieee_extended (d_longdbl.U):
1601 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_EXTENDED
1602 if the long double is the 80-bit IEEE 754 extended precision.
1603 Note that despite the 'extended' this is less than the 'std',
1604 since thisis an extension of the double precision.
1605
1606d_long_double_style_ieee_std (d_longdbl.U):
1607 This variable conditionally defines LONG_DOUBLE_STYLE_IEEE_STD
1608 if the long double is the 128-bit IEEE 754.
1609
1610d_long_double_style_vax (d_longdbl.U):
1611 This variable conditionally defines LONG_DOUBLE_STYLE_VAX
1612 if the long double is the 128-bit VAX format H.
1613
781b178c 1614d_longlong (d_longlong.U):
635aebb7 1615 This variable conditionally defines HAS_LONG_LONG if
781b178c
JH
1616 the long long type is supported.
1617
427d28ce
JH
1618d_lrint (d_lrint.U):
1619 This variable conditionally defines the HAS_LRINT symbol, which
1620 indicates to the C program that the lrint() routine is available
2640dfa8
MB
1621 to return the integral value closest to a double (according
1622 to the current rounding mode).
427d28ce 1623
bc580dd3
JH
1624d_lrintl (d_lrintl.U):
1625 This variable conditionally defines the HAS_LRINTL symbol, which
1626 indicates to the C program that the lrintl() routine is available
2640dfa8
MB
1627 to return the integral value closest to a long double (according
1628 to the current rounding mode).
bc580dd3 1629
427d28ce
JH
1630d_lround (d_lround.U):
1631 This variable conditionally defines the HAS_LROUND symbol, which
1632 indicates to the C program that the lround() routine is available
f40bbcbf 1633 to return the integral value nearest to x.
427d28ce 1634
bc580dd3
JH
1635d_lroundl (d_lroundl.U):
1636 This variable conditionally defines the HAS_LROUNDL symbol, which
1637 indicates to the C program that the lroundl() routine is available
2640dfa8 1638 to return the integral value nearest to x away from zero.
bc580dd3 1639
c890dc6c
JH
1640d_lseekproto (d_lseekproto.U):
1641 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
1642 which indicates to the C program that the system provides
1643 a prototype for the lseek() function. Otherwise, it is
1644 up to the program to supply one.
1645
781b178c
JH
1646d_lstat (d_lstat.U):
1647 This variable conditionally defines HAS_LSTAT if lstat() is
1648 available to do file stats on symbolic links.
1649
792d8dab
JH
1650d_madvise (d_madvise.U):
1651 This variable conditionally defines HAS_MADVISE if madvise() is
1652 available to map a file into memory.
1653
df4c34dc
MB
1654d_malloc_good_size (d_malloc_size.U):
1655 This symbol, if defined, indicates that the malloc_good_size
7dd121ae
MB
1656 routine is available for use.
1657
df4c34dc
MB
1658d_malloc_size (d_malloc_size.U):
1659 This symbol, if defined, indicates that the malloc_size
7dd121ae
MB
1660 routine is available for use.
1661
781b178c
JH
1662d_mblen (d_mblen.U):
1663 This variable conditionally defines the HAS_MBLEN symbol, which
1664 indicates to the C program that the mblen() routine is available
1665 to find the number of bytes in a multibye character.
1666
1667d_mbstowcs (d_mbstowcs.U):
1668 This variable conditionally defines the HAS_MBSTOWCS symbol, which
1669 indicates to the C program that the mbstowcs() routine is available
1670 to convert a multibyte string into a wide character string.
1671
1672d_mbtowc (d_mbtowc.U):
1673 This variable conditionally defines the HAS_MBTOWC symbol, which
1674 indicates to the C program that the mbtowc() routine is available
1675 to convert multibyte to a wide character.
1676
1677d_memchr (d_memchr.U):
1678 This variable conditionally defines the HAS_MEMCHR symbol, which
1679 indicates to the C program that the memchr() routine is available
1680 to locate characters within a C string.
1681
1682d_memcmp (d_memcmp.U):
1683 This variable conditionally defines the HAS_MEMCMP symbol, which
1684 indicates to the C program that the memcmp() routine is available
1685 to compare blocks of memory.
1686
1687d_memcpy (d_memcpy.U):
1688 This variable conditionally defines the HAS_MEMCPY symbol, which
1689 indicates to the C program that the memcpy() routine is available
1690 to copy blocks of memory.
1691
3879c54d
MB
1692d_memmem (d_memmem.U):
1693 This variable conditionally defines the HAS_MEMMEM symbol, which
1694 indicates to the C program that the memmem() routine is available
1695 to return a pointer to the start of the first occurance of a
1696 substring in a memory area (or NULL if not found).
1697
781b178c
JH
1698d_memmove (d_memmove.U):
1699 This variable conditionally defines the HAS_MEMMOVE symbol, which
1700 indicates to the C program that the memmove() routine is available
47e01c32 1701 to copy potentially overlapping blocks of memory.
781b178c
JH
1702
1703d_memset (d_memset.U):
1704 This variable conditionally defines the HAS_MEMSET symbol, which
1705 indicates to the C program that the memset() routine is available
1706 to set blocks of memory.
1707
1708d_mkdir (d_mkdir.U):
1709 This variable conditionally defines the HAS_MKDIR symbol, which
1710 indicates to the C program that the mkdir() routine is available
209e5c0a 1711 to create directories..
781b178c 1712
fe749a9f
JH
1713d_mkdtemp (d_mkdtemp.U):
1714 This variable conditionally defines the HAS_MKDTEMP symbol, which
1715 indicates to the C program that the mkdtemp() routine is available
1716 to exclusively create a uniquely named temporary directory.
1717
781b178c
JH
1718d_mkfifo (d_mkfifo.U):
1719 This variable conditionally defines the HAS_MKFIFO symbol, which
1720 indicates to the C program that the mkfifo() routine is available.
1721
fe749a9f
JH
1722d_mkstemp (d_mkstemp.U):
1723 This variable conditionally defines the HAS_MKSTEMP symbol, which
1724 indicates to the C program that the mkstemp() routine is available
1725 to exclusively create and open a uniquely named temporary file.
1726
1727d_mkstemps (d_mkstemps.U):
1728 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1729 indicates to the C program that the mkstemps() routine is available
1730 to exclusively create and open a uniquely named (with a suffix)
1731 temporary file.
1732
781b178c
JH
1733d_mktime (d_mktime.U):
1734 This variable conditionally defines the HAS_MKTIME symbol, which
1735 indicates to the C program that the mktime() routine is available.
1736
96938616
MB
1737d_mktime64 (d_timefuncs64.U):
1738 This variable conditionally defines the HAS_MKTIME64 symbol, which
1739 indicates to the C program that the mktime64 () routine is available.
1740
fe749a9f
JH
1741d_mmap (d_mmap.U):
1742 This variable conditionally defines HAS_MMAP if mmap() is
1743 available to map a file into memory.
1744
a3540c92
JH
1745d_modfl (d_modfl.U):
1746 This variable conditionally defines the HAS_MODFL symbol, which
1747 indicates to the C program that the modfl() routine is available.
1748
44b94491
MB
1749d_modflproto (d_modfl.U):
1750 This symbol, if defined, indicates that the system provides
1751 a prototype for the modfl() function. Otherwise, it is up
1752 to the program to supply one. C99 says it should be
1753 long double modfl(long double, long double *);
1754
fe749a9f
JH
1755d_mprotect (d_mprotect.U):
1756 This variable conditionally defines HAS_MPROTECT if mprotect() is
1757 available to modify the access protection of a memory mapped file.
1758
781b178c
JH
1759d_msg (d_msg.U):
1760 This variable conditionally defines the HAS_MSG symbol, which
1761 indicates that the entire msg*(2) library is present.
1762
2640dfa8
MB
1763d_msg_ctrunc (d_socket.U):
1764 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1765 which indicates that the MSG_CTRUNC is available. #ifdef is
1766 not enough because it may be an enum, glibc has been known to do this.
1767
1768d_msg_dontroute (d_socket.U):
1769 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1770 which indicates that the MSG_DONTROUTE is available. #ifdef is
1771 not enough because it may be an enum, glibc has been known to do this.
1772
1773d_msg_oob (d_socket.U):
1774 This variable conditionally defines the HAS_MSG_OOB symbol,
1775 which indicates that the MSG_OOB is available. #ifdef is
1776 not enough because it may be an enum, glibc has been known to do this.
1777
1778d_msg_peek (d_socket.U):
1779 This variable conditionally defines the HAS_MSG_PEEK symbol,
1780 which indicates that the MSG_PEEK is available. #ifdef is
1781 not enough because it may be an enum, glibc has been known to do this.
1782
1783d_msg_proxy (d_socket.U):
1784 This variable conditionally defines the HAS_MSG_PROXY symbol,
1785 which indicates that the MSG_PROXY is available. #ifdef is
1786 not enough because it may be an enum, glibc has been known to do this.
1787
781b178c
JH
1788d_msgctl (d_msgctl.U):
1789 This variable conditionally defines the HAS_MSGCTL symbol, which
1790 indicates to the C program that the msgctl() routine is available.
1791
1792d_msgget (d_msgget.U):
1793 This variable conditionally defines the HAS_MSGGET symbol, which
1794 indicates to the C program that the msgget() routine is available.
1795
4e0554ec
JH
1796d_msghdr_s (d_msghdr_s.U):
1797 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1798 which indicates that the struct msghdr is supported.
1799
781b178c
JH
1800d_msgrcv (d_msgrcv.U):
1801 This variable conditionally defines the HAS_MSGRCV symbol, which
1802 indicates to the C program that the msgrcv() routine is available.
1803
1804d_msgsnd (d_msgsnd.U):
1805 This variable conditionally defines the HAS_MSGSND symbol, which
1806 indicates to the C program that the msgsnd() routine is available.
1807
fe749a9f
JH
1808d_msync (d_msync.U):
1809 This variable conditionally defines HAS_MSYNC if msync() is
1810 available to synchronize a mapped file.
1811
1812d_munmap (d_munmap.U):
1813 This variable conditionally defines HAS_MUNMAP if munmap() is
1814 available to unmap a region mapped by mmap().
1815
781b178c
JH
1816d_mymalloc (mallocsrc.U):
1817 This variable conditionally defines MYMALLOC in case other parts
1818 of the source want to take special action if MYMALLOC is used.
1819 This may include different sorts of profiling or error detection.
1820
427d28ce
JH
1821d_nan (d_nan.U):
1822 This variable conditionally defines HAS_NAN if nan() is
1823 available to generate NaN.
1824
a33f2d9f
AD
1825d_ndbm (i_ndbm.U):
1826 This variable conditionally defines the HAS_NDBM symbol, which
1827 indicates that both the ndbm.h include file and an appropriate ndbm
1828 library exist. Consult the different i_*ndbm variables
1829 to find out the actual include location. Sometimes, a system has the
1830 header file but not the library. This variable will only be set if
1831 the system has both.
1832
e74475c7
MHM
1833d_ndbm_h_uses_prototypes (i_ndbm.U):
1834 This variable conditionally defines the NDBM_H_USES_PROTOTYPES symbol,
1835 which indicates that the ndbm.h include file uses real ANSI C
1836 prototypes instead of K&R style function declarations. K&R style
1837 declarations are unsupported in C++, so the include file requires
1838 special handling when using a C++ compiler and this variable is
1839 undefined. Consult the different d_*ndbm_h_uses_prototypes variables
1840 to get the same information for alternative ndbm.h include files.
1841
427d28ce
JH
1842d_nearbyint (d_nearbyint.U):
1843 This variable conditionally defines HAS_NEARBYINT if nearbyint()
1844 is available to return the integral value closest to (according to
1845 the current rounding mode) to x.
1846
ecb44b8e
MB
1847d_newlocale (d_newlocale.U):
1848 This variable conditionally defines the HAS_NEWLOCALE symbol, which
1849 indicates to the C program that the newlocale() routine is available
1850 to return a new locale object or modify an existing locale object.
1851
427d28ce
JH
1852d_nextafter (d_nextafter.U):
1853 This variable conditionally defines HAS_NEXTAFTER if nextafter()
1854 is available to return the next machine representable double from
1855 x in direction y.
1856
1857d_nexttoward (d_nexttoward.U):
1858 This variable conditionally defines HAS_NEXTTOWARD if nexttoward()
1859 is available to return the next machine representable long double from
1860 x in direction y.
1861
781b178c
JH
1862d_nice (d_nice.U):
1863 This variable conditionally defines the HAS_NICE symbol, which
1864 indicates to the C program that the nice() routine is available.
1865
2765b840
JH
1866d_nl_langinfo (d_nl_langinfo.U):
1867 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1868 indicates to the C program that the nl_langinfo() routine is available.
1869
78691af5 1870d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1871 This variable indicates whether a variable of type nvtype
1872 can preserve all the bits a variable of type uvtype.
1873
f607920a
CB
1874d_nv_zero_is_allbits_zero (perlxv.U):
1875 This variable indicates whether a variable of type nvtype
1876 stores 0.0 in memory as all bits zero.
1877
c890dc6c 1878d_off64_t (d_off64_t.U):
781b178c
JH
1879 This symbol will be defined if the C compiler supports off64_t.
1880
781b178c
JH
1881d_old_pthread_create_joinable (d_pthrattrj.U):
1882 This variable conditionally defines pthread_create_joinable.
1883 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1884
1885d_oldpthreads (usethreads.U):
1886 This variable conditionally defines the OLD_PTHREADS_API symbol,
1887 and indicates that Perl should be built to use the old
8c09e4ca 1888 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1889 usethreads is set.
1890
1891d_oldsock (d_socket.U):
1892 This variable conditionally defines the OLDSOCKET symbol, which
1893 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1894
1895d_open3 (d_open3.U):
1896 This variable conditionally defines the HAS_OPEN3 manifest constant,
1897 which indicates to the C program that the 3 argument version of
1898 the open(2) function is available.
1899
781b178c
JH
1900d_pathconf (d_pathconf.U):
1901 This variable conditionally defines the HAS_PATHCONF symbol, which
1902 indicates to the C program that the pathconf() routine is available
1903 to determine file-system related limits and options associated
1904 with a given filename.
1905
1906d_pause (d_pause.U):
1907 This variable conditionally defines the HAS_PAUSE symbol, which
1908 indicates to the C program that the pause() routine is available
1909 to suspend a process until a signal is received.
1910
3b777bb4
GS
1911d_perl_otherlibdirs (otherlibdirs.U):
1912 This variable conditionally defines PERL_OTHERLIBDIRS, which
1913 contains a colon-separated set of paths for the perl binary to
1914 include in @INC. See also otherlibdirs.
1915
781b178c
JH
1916d_phostname (d_gethname.U):
1917 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1918 contains the shell command which, when fed to popen(), may be
1919 used to derive the host name.
1920
1921d_pipe (d_pipe.U):
1922 This variable conditionally defines the HAS_PIPE symbol, which
1923 indicates to the C program that the pipe() routine is available
1924 to create an inter-process channel.
1925
1926d_poll (d_poll.U):
1927 This variable conditionally defines the HAS_POLL symbol, which
1928 indicates to the C program that the poll() routine is available
1929 to poll active file descriptors.
1930
1931d_portable (d_portable.U):
1932 This variable conditionally defines the PORTABLE symbol, which
1933 indicates to the C program that it should not assume that it is
1934 running on the machine it was compiled on.
1935
c796e3db
MB
1936d_prctl (d_prctl.U):
1937 This variable conditionally defines the HAS_PRCTL symbol, which
1938 indicates to the C program that the prctl() routine is available.
b75ee85b
JH
1939 Note that there are at least two prctl variants: Linux and Irix.
1940 While they are somewhat similar, they are incompatible.
c796e3db 1941
f918391d
MB
1942d_prctl_set_name (d_prctl.U):
1943 This variable conditionally defines the HAS_PRCTL_SET_NAME symbol,
2245bcb6
CB
1944 which indicates to the C program that the prctl() routine supports
1945 the PR_SET_NAME option.
c796e3db 1946
4d54317a
JH
1947d_PRId64 (quadfio.U):
1948 This variable conditionally defines the PERL_PRId64 symbol, which
47e01c32 1949 indicates that stdio has a symbol to print 64-bit decimal numbers.
4d54317a
JH
1950
1951d_PRIeldbl (longdblfio.U):
1952 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1953 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1954
1955d_PRIEUldbl (longdblfio.U):
1956 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1957 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1958 The 'U' in the name is to separate this from d_PRIeldbl so that even
1959 case-blind systems can see the difference.
1960
1961d_PRIfldbl (longdblfio.U):
1962 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1963 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1964
1965d_PRIFUldbl (longdblfio.U):
1966 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1967 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1968 The 'U' in the name is to separate this from d_PRIfldbl so that even
1969 case-blind systems can see the difference.
1970
1971d_PRIgldbl (longdblfio.U):
1972 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1973 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1974
1975d_PRIGUldbl (longdblfio.U):
1976 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 1977 indicates that stdio has a symbol to print long doubles.
4d54317a
JH
1978 The 'U' in the name is to separate this from d_PRIgldbl so that even
1979 case-blind systems can see the difference.
1980
1981d_PRIi64 (quadfio.U):
1982 This variable conditionally defines the PERL_PRIi64 symbol, which
47e01c32 1983 indicates that stdio has a symbol to print 64-bit decimal numbers.
4d54317a 1984
066e7355 1985d_printf_format_null (d_attribut.U):
dcb594bc
MB
1986 This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
1987 indicates the C compiler allows printf-like formats to be null.
1988
4d54317a
JH
1989d_PRIo64 (quadfio.U):
1990 This variable conditionally defines the PERL_PRIo64 symbol, which
47e01c32 1991 indicates that stdio has a symbol to print 64-bit octal numbers.
4d54317a
JH
1992
1993d_PRIu64 (quadfio.U):
1994 This variable conditionally defines the PERL_PRIu64 symbol, which
47e01c32 1995 indicates that stdio has a symbol to print 64-bit unsigned decimal
4d54317a
JH
1996 numbers.
1997
1998d_PRIx64 (quadfio.U):
1999 This variable conditionally defines the PERL_PRIx64 symbol, which
47e01c32 2000 indicates that stdio has a symbol to print 64-bit hexadecimal numbers.
4d54317a
JH
2001
2002d_PRIXU64 (quadfio.U):
2003 This variable conditionally defines the PERL_PRIXU64 symbol, which
47e01c32 2004 indicates that stdio has a symbol to print 64-bit hExADECimAl numbers.
4d54317a
JH
2005 The 'U' in the name is to separate this from d_PRIx64 so that even
2006 case-blind systems can see the difference.
2007
428dc699
JH
2008d_procselfexe (d_procselfexe.U):
2009 Defined if $procselfexe is symlink to the absolute
2010 pathname of the executing program.
2011
233e16ce
MB
2012d_pseudofork (d_vfork.U):
2013 This variable conditionally defines the HAS_PSEUDOFORK symbol,
2014 which indicates that an emulation of the fork routine is available.
2015
d6483fcc
JH
2016d_pthread_atfork (d_pthread_atfork.U):
2017 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
2018 which indicates to the C program that the pthread_atfork()
2019 routine is available.
2020
505656d3
JH
2021d_pthread_attr_setscope (d_pthread_attr_ss.U):
2022 This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if
2023 pthread_attr_setscope() is available to set the contention scope
2024 attribute of a thread attribute object.
2025
781b178c
JH
2026d_pthread_yield (d_pthread_y.U):
2027 This variable conditionally defines the HAS_PTHREAD_YIELD
2028 symbol if the pthread_yield routine is available to yield
2029 the execution of the current thread.
2030
0e0c5f82 2031d_ptrdiff_t (d_ptrdiff_t.U):
35ab5b73
BF
2032 This symbol will be defined if the C compiler supports ptrdiff_t.
2033
781b178c
JH
2034d_pwage (i_pwd.U):
2035 This variable conditionally defines PWAGE, which indicates
2036 that struct passwd contains pw_age.
2037
2038d_pwchange (i_pwd.U):
2039 This variable conditionally defines PWCHANGE, which indicates
2040 that struct passwd contains pw_change.
2041
2042d_pwclass (i_pwd.U):
2043 This variable conditionally defines PWCLASS, which indicates
2044 that struct passwd contains pw_class.
2045
2046d_pwcomment (i_pwd.U):
2047 This variable conditionally defines PWCOMMENT, which indicates
2048 that struct passwd contains pw_comment.
2049
2050d_pwexpire (i_pwd.U):
2051 This variable conditionally defines PWEXPIRE, which indicates
2052 that struct passwd contains pw_expire.
2053
2054d_pwgecos (i_pwd.U):
2055 This variable conditionally defines PWGECOS, which indicates
2056 that struct passwd contains pw_gecos.
2057
2058d_pwpasswd (i_pwd.U):
2059 This variable conditionally defines PWPASSWD, which indicates
2060 that struct passwd contains pw_passwd.
2061
2062d_pwquota (i_pwd.U):
2063 This variable conditionally defines PWQUOTA, which indicates
2064 that struct passwd contains pw_quota.
2065
792d8dab
JH
2066d_qgcvt (d_qgcvt.U):
2067 This variable conditionally defines the HAS_QGCVT symbol, which
2068 indicates to the C program that the qgcvt() routine is available.
2069
de1c2614
JH
2070d_quad (quadtype.U):
2071 This variable, if defined, tells that there's a 64-bit integer type,
2072 quadtype.
2073
884c85de
MB
2074d_querylocale (d_newlocale.U):
2075 This variable conditionally defines the HAS_QUERYLOCALE symbol, which
2076 indicates to the C program that the querylocale() routine is available
2077 to return the name of the locale for a category mask.
2078
10bc17b6
JH
2079d_random_r (d_random_r.U):
2080 This variable conditionally defines the HAS_RANDOM_R symbol,
2081 which indicates to the C program that the random_r()
2082 routine is available.
2083
f40bbcbf
MB
2084d_re_comp (d_regcmp.U):
2085 This variable conditionally defines the HAS_RECOMP symbol, which
2086 indicates to the C program that the re_comp() routine is available
2087 for regular patern matching (usally on BSD). If so, it is likely that
2088 re_exec() exists.
2089
df4c34dc
MB
2090d_readdir (d_readdir.U):
2091 This variable conditionally defines HAS_READDIR if readdir() is
2092 available to read directory entries.
2093
10bc17b6
JH
2094d_readdir64_r (d_readdir64_r.U):
2095 This variable conditionally defines the HAS_READDIR64_R symbol,
2096 which indicates to the C program that the readdir64_r()
2097 routine is available.
2098
10bc17b6
JH
2099d_readdir_r (d_readdir_r.U):
2100 This variable conditionally defines the HAS_READDIR_R symbol,
2101 which indicates to the C program that the readdir_r()
2102 routine is available.
2103
781b178c
JH
2104d_readlink (d_readlink.U):
2105 This variable conditionally defines the HAS_READLINK symbol, which
2106 indicates to the C program that the readlink() routine is available
2107 to read the value of a symbolic link.
2108
4e0554ec
JH
2109d_readv (d_readv.U):
2110 This variable conditionally defines the HAS_READV symbol, which
2111 indicates to the C program that the readv() routine is available.
2112
2113d_recvmsg (d_recvmsg.U):
2114 This variable conditionally defines the HAS_RECVMSG symbol, which
2115 indicates to the C program that the recvmsg() routine is available.
2116
f40bbcbf
MB
2117d_regcmp (d_regcmp.U):
2118 This variable conditionally defines the HAS_REGCMP symbol, which
2119 indicates to the C program that the regcmp() routine is available
2120 for regular patern matching (usally on System V).
2121
2122d_regcomp (d_regcmp.U):
2123 This variable conditionally defines the HAS_REGCOMP symbol, which
2124 indicates to the C program that the regcomp() routine is available
2125 for regular patern matching (usally on POSIX.2 conforming systems).
2126
427d28ce
JH
2127d_remainder (d_remainder.U):
2128 This variable conditionally defines the HAS_REMAINDER symbol, which
2129 indicates to the C program that the remainder() routine is available.
2130
2131d_remquo (d_remquo.U):
2132 This variable conditionally defines the HAS_REMQUO symbol, which
2133 indicates to the C program that the remquo() routine is available.
2134
781b178c
JH
2135d_rename (d_rename.U):
2136 This variable conditionally defines the HAS_RENAME symbol, which
2137 indicates to the C program that the rename() routine is available
2138 to rename files.
2139
2140d_rewinddir (d_readdir.U):
2141 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
2142 available.
2143
427d28ce
JH
2144d_rint (d_rint.U):
2145 This variable conditionally defines the HAS_RINT symbol, which
2146 indicates to the C program that the rint() routine is available.
2147
781b178c
JH
2148d_rmdir (d_rmdir.U):
2149 This variable conditionally defines HAS_RMDIR if rmdir() is
2150 available to remove directories.
2151
427d28ce
JH
2152d_round (d_round.U):
2153 This variable conditionally defines the HAS_ROUND symbol, which
2154 indicates to the C program that the round() routine is available.
2155
781b178c
JH
2156d_safebcpy (d_safebcpy.U):
2157 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
2158 the bcopy() routine can do overlapping copies. Normally, you
2159 should probably use memmove().
781b178c
JH
2160
2161d_safemcpy (d_safemcpy.U):
2162 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
2163 the memcpy() routine can do overlapping copies.
b6cc3bc4 2164 For overlapping copies, memmove() should be used, if available.
781b178c
JH
2165
2166d_sanemcmp (d_sanemcmp.U):
2167 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
2168 the memcpy() routine is available and can be used to compare relative
2169 magnitudes of chars with their high bits set.
2170
ef9f17be
JH
2171d_sbrkproto (d_sbrkproto.U):
2172 This variable conditionally defines the HAS_SBRK_PROTO symbol,
2173 which indicates to the C program that the system provides
2174 a prototype for the sbrk() function. Otherwise, it is
2175 up to the program to supply one.
2176
427d28ce
JH
2177d_scalbn (d_scalbn.U):
2178 This variable conditionally defines the HAS_SCALBN symbol, which
2179 indicates to the C program that the scalbn() routine is available.
2180
5c567d7d
JH
2181d_scalbnl (d_scalbnl.U):
2182 This variable conditionally defines the HAS_SCALBNL symbol, which
2183 indicates to the C program that the scalbnl() routine is available.
2184 If ilogbl is also present we can emulate frexpl.
2185
781b178c
JH
2186d_sched_yield (d_pthread_y.U):
2187 This variable conditionally defines the HAS_SCHED_YIELD
2188 symbol if the sched_yield routine is available to yield
2189 the execution of the current thread.
2190
2640dfa8
MB
2191d_scm_rights (d_socket.U):
2192 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
2193 which indicates that the SCM_RIGHTS is available. #ifdef is
2194 not enough because it may be an enum, glibc has been known to do this.
2195
4d54317a
JH
2196d_SCNfldbl (longdblfio.U):
2197 This variable conditionally defines the PERL_PRIfldbl symbol, which
47e01c32 2198 indicates that stdio has a symbol to scan long doubles.
4d54317a 2199
781b178c
JH
2200d_seekdir (d_readdir.U):
2201 This variable conditionally defines HAS_SEEKDIR if seekdir() is
2202 available.
2203
2204d_select (d_select.U):
2205 This variable conditionally defines HAS_SELECT if select() is
2206 available to select active file descriptors. A <sys/time.h>
2207 inclusion may be necessary for the timeout field.
2208
2209d_sem (d_sem.U):
2210 This variable conditionally defines the HAS_SEM symbol, which
2211 indicates that the entire sem*(2) library is present.
2212
2213d_semctl (d_semctl.U):
2214 This variable conditionally defines the HAS_SEMCTL symbol, which
2215 indicates to the C program that the semctl() routine is available.
2216
2217d_semctl_semid_ds (d_union_semun.U):
2218 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
2219 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
2220
2221d_semctl_semun (d_union_semun.U):
2222 This variable conditionally defines USE_SEMCTL_SEMUN, which
2223 indicates that union semun is to be used for semctl IPC_STAT.
2224
2225d_semget (d_semget.U):
2226 This variable conditionally defines the HAS_SEMGET symbol, which
2227 indicates to the C program that the semget() routine is available.
2228
2229d_semop (d_semop.U):
2230 This variable conditionally defines the HAS_SEMOP symbol, which
2231 indicates to the C program that the semop() routine is available.
2232
4e0554ec
JH
2233d_sendmsg (d_sendmsg.U):
2234 This variable conditionally defines the HAS_SENDMSG symbol, which
2235 indicates to the C program that the sendmsg() routine is available.
2236
781b178c
JH
2237d_setegid (d_setegid.U):
2238 This variable conditionally defines the HAS_SETEGID symbol, which
2239 indicates to the C program that the setegid() routine is available
2240 to change the effective gid of the current program.
2241
2242d_seteuid (d_seteuid.U):
2243 This variable conditionally defines the HAS_SETEUID symbol, which
2244 indicates to the C program that the seteuid() routine is available
2245 to change the effective uid of the current program.
2246
2247d_setgrent (d_setgrent.U):
2248 This variable conditionally defines the HAS_SETGRENT symbol, which
2249 indicates to the C program that the setgrent() routine is available
2250 for initializing sequential access to the group database.
2251
10bc17b6
JH
2252d_setgrent_r (d_setgrent_r.U):
2253 This variable conditionally defines the HAS_SETGRENT_R symbol,
2254 which indicates to the C program that the setgrent_r()
2255 routine is available.
2256
781b178c
JH
2257d_setgrps (d_setgrps.U):
2258 This variable conditionally defines the HAS_SETGROUPS symbol, which
2259 indicates to the C program that the setgroups() routine is available
2260 to set the list of process groups.
2261
2262d_sethent (d_sethent.U):
2263 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
2264 available.
2265
10bc17b6
JH
2266d_sethostent_r (d_sethostent_r.U):
2267 This variable conditionally defines the HAS_SETHOSTENT_R symbol,
2268 which indicates to the C program that the sethostent_r()
2269 routine is available.
2270
4e0554ec
JH
2271d_setitimer (d_setitimer.U):
2272 This variable conditionally defines the HAS_SETITIMER symbol, which
2273 indicates to the C program that the setitimer() routine is available.
2274
781b178c
JH
2275d_setlinebuf (d_setlnbuf.U):
2276 This variable conditionally defines the HAS_SETLINEBUF symbol, which
2277 indicates to the C program that the setlinebuf() routine is available
2278 to change stderr or stdout from block-buffered or unbuffered to a
2279 line-buffered mode.
2280
2281d_setlocale (d_setlocale.U):
2282 This variable conditionally defines HAS_SETLOCALE if setlocale() is
2283 available to handle locale-specific ctype implementations.
2284
10bc17b6
JH
2285d_setlocale_r (d_setlocale_r.U):
2286 This variable conditionally defines the HAS_SETLOCALE_R symbol,
2287 which indicates to the C program that the setlocale_r()
2288 routine is available.
2289
781b178c
JH
2290d_setnent (d_setnent.U):
2291 This variable conditionally defines HAS_SETNETENT if setnetent() is
2292 available.
2293
10bc17b6
JH
2294d_setnetent_r (d_setnetent_r.U):
2295 This variable conditionally defines the HAS_SETNETENT_R symbol,
2296 which indicates to the C program that the setnetent_r()
2297 routine is available.
2298
781b178c
JH
2299d_setpent (d_setpent.U):
2300 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
2301 available.
2302
2303d_setpgid (d_setpgid.U):
2304 This variable conditionally defines the HAS_SETPGID symbol if the
2305 setpgid(pid, gpid) function is available to set process group ID.
2306
df4c34dc
MB
2307d_setpgrp (d_setpgrp.U):
2308 This variable conditionally defines HAS_SETPGRP if setpgrp() is
2309 available to set the current process group.
2310
781b178c
JH
2311d_setpgrp2 (d_setpgrp2.U):
2312 This variable conditionally defines the HAS_SETPGRP2 symbol, which
2313 indicates to the C program that the setpgrp2() (as in DG/UX) routine
2314 is available to set the current process group.
2315
781b178c
JH
2316d_setprior (d_setprior.U):
2317 This variable conditionally defines HAS_SETPRIORITY if setpriority()
2318 is available to set a process's priority.
2319
af960fef
JH
2320d_setproctitle (d_setproctitle.U):
2321 This variable conditionally defines the HAS_SETPROCTITLE symbol,
2322 which indicates to the C program that the setproctitle() routine
2323 is available.
2324
10bc17b6
JH
2325d_setprotoent_r (d_setprotoent_r.U):
2326 This variable conditionally defines the HAS_SETPROTOENT_R symbol,
2327 which indicates to the C program that the setprotoent_r()
2328 routine is available.
2329
781b178c
JH
2330d_setpwent (d_setpwent.U):
2331 This variable conditionally defines the HAS_SETPWENT symbol, which
2332 indicates to the C program that the setpwent() routine is available
2333 for initializing sequential access to the passwd database.
2334
10bc17b6
JH
2335d_setpwent_r (d_setpwent_r.U):
2336 This variable conditionally defines the HAS_SETPWENT_R symbol,
2337 which indicates to the C program that the setpwent_r()
2338 routine is available.
2339
781b178c
JH
2340d_setregid (d_setregid.U):
2341 This variable conditionally defines HAS_SETREGID if setregid() is
2342 available to change the real and effective gid of the current
2343 process.
2344
2345d_setresgid (d_setregid.U):
2346 This variable conditionally defines HAS_SETRESGID if setresgid() is
2347 available to change the real, effective and saved gid of the current
2348 process.
2349
2350d_setresuid (d_setreuid.U):
2351 This variable conditionally defines HAS_SETREUID if setresuid() is
2352 available to change the real, effective and saved uid of the current
2353 process.
2354
2355d_setreuid (d_setreuid.U):
2356 This variable conditionally defines HAS_SETREUID if setreuid() is
2357 available to change the real and effective uid of the current
2358 process.
2359
2360d_setrgid (d_setrgid.U):
2361 This variable conditionally defines the HAS_SETRGID symbol, which
2362 indicates to the C program that the setrgid() routine is available
2363 to change the real gid of the current program.
2364
2365d_setruid (d_setruid.U):
2366 This variable conditionally defines the HAS_SETRUID symbol, which
2367 indicates to the C program that the setruid() routine is available
2368 to change the real uid of the current program.
2369
2370d_setsent (d_setsent.U):
2371 This variable conditionally defines HAS_SETSERVENT if setservent() is
2372 available.
2373
10bc17b6
JH
2374d_setservent_r (d_setservent_r.U):
2375 This variable conditionally defines the HAS_SETSERVENT_R symbol,
2376 which indicates to the C program that the setservent_r()
2377 routine is available.
2378
781b178c
JH
2379d_setsid (d_setsid.U):
2380 This variable conditionally defines HAS_SETSID if setsid() is
2381 available to set the process group ID.
2382
781b178c
JH
2383d_setvbuf (d_setvbuf.U):
2384 This variable conditionally defines the HAS_SETVBUF symbol, which
2385 indicates to the C program that the setvbuf() routine is available
2386 to change buffering on an open stdio stream.
2387
781b178c
JH
2388d_shm (d_shm.U):
2389 This variable conditionally defines the HAS_SHM symbol, which
2390 indicates that the entire shm*(2) library is present.
2391
2392d_shmat (d_shmat.U):
2393 This variable conditionally defines the HAS_SHMAT symbol, which
2394 indicates to the C program that the shmat() routine is available.
2395
2396d_shmatprototype (d_shmat.U):
635aebb7 2397 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
781b178c
JH
2398 symbol, which indicates that sys/shm.h has a prototype for
2399 shmat.
2400
2401d_shmctl (d_shmctl.U):
2402 This variable conditionally defines the HAS_SHMCTL symbol, which
2403 indicates to the C program that the shmctl() routine is available.
2404
2405d_shmdt (d_shmdt.U):
2406 This variable conditionally defines the HAS_SHMDT symbol, which
2407 indicates to the C program that the shmdt() routine is available.
2408
2409d_shmget (d_shmget.U):
2410 This variable conditionally defines the HAS_SHMGET symbol, which
2411 indicates to the C program that the shmget() routine is available.
2412
2413d_sigaction (d_sigaction.U):
2414 This variable conditionally defines the HAS_SIGACTION symbol, which
2415 indicates that the Vr4 sigaction() routine is available.
2416
2640dfa8
MB
2417d_siginfo_si_addr (d_siginfo_si.U):
2418 This variable conditionally defines the HAS_SIGINFO_SI_ADDR symbol,
2419 which indicates that the siginfo_t struct has the si_addr member.
2420
2421d_siginfo_si_band (d_siginfo_si.U):
2422 This variable conditionally defines the HAS_SIGINFO_SI_BAND symbol,
2423 which indicates that the siginfo_t struct has the si_band member.
2424
2425d_siginfo_si_errno (d_siginfo_si.U):
2426 This variable conditionally defines the HAS_SIGINFO_SI_ERRNO symbol,
2427 which indicates that the siginfo_t struct has the si_errno member.
2428
7e69463d
AC
2429d_siginfo_si_fd (d_siginfo_si.U):
2430 This variable conditionally defines the HAS_SIGINFO_SI_FD symbol,
2431 which indicates that the siginfo_t struct has the si_fd member.
2432
2640dfa8
MB
2433d_siginfo_si_pid (d_siginfo_si.U):
2434 This variable conditionally defines the HAS_SIGINFO_SI_PID symbol,
2435 which indicates that the siginfo_t struct has the si_pid member.
2436
2437d_siginfo_si_status (d_siginfo_si.U):
2438 This variable conditionally defines the HAS_SIGINFO_SI_STATUS symbol,
2439 which indicates that the siginfo_t struct has the si_status member.
2440
2441d_siginfo_si_uid (d_siginfo_si.U):
2442 This variable conditionally defines the HAS_SIGINFO_SI_UID symbol,
2443 which indicates that the siginfo_t struct has the si_uid member.
2444
2445d_siginfo_si_value (d_siginfo_si.U):
2446 This variable conditionally defines the HAS_SIGINFO_SI_VALUE symbol,
2447 which indicates that the siginfo_t struct has the si_value member.
2448
ed140128
AD
2449d_signbit (d_signbit.U):
2450 This variable conditionally defines the HAS_SIGNBIT symbol, which
2451 indicates to the C program that the signbit() routine is available
2452 and safe to use with perl's intern NV type.
2453
983dbef6
JH
2454d_sigprocmask (d_sigprocmask.U):
2455 This variable conditionally defines HAS_SIGPROCMASK
2456 if sigprocmask() is available to examine or change the signal mask
2457 of the calling process.
2458
781b178c
JH
2459d_sigsetjmp (d_sigsetjmp.U):
2460 This variable conditionally defines the HAS_SIGSETJMP symbol,
2461 which indicates that the sigsetjmp() routine is available to
2462 call setjmp() and optionally save the process's signal mask.
2463
f53580fe
MB
2464d_sin6_scope_id (d_socket.U):
2465 This variable conditionally defines the HAS_SIN6_SCOPE_ID symbol, which
2466 indicates that a struct sockaddr_in6 structure has the sin6_scope_id
2467 member.
2468
c95d0e17
GA
2469d_sitearch (sitearch.U):
2470 This variable conditionally defines SITEARCH to hold the pathname
2471 of architecture-dependent library files for $package. If
2472 $sitearch is the same as $archlib, then this is set to undef.
2473
df4c34dc
MB
2474d_snprintf (d_snprintf.U):
2475 This variable conditionally defines the HAS_SNPRINTF symbol, which
2476 indicates to the C program that the snprintf () library function
2477 is available.
2478
18126d98
MB
2479d_sockaddr_in6 (d_socket.U):
2480 This variable conditionally defines the HAS_SOCKADDR_IN6 symbol, which
2481 indicates the availability of a struct sockaddr_in6.
2482
b8677e3b
MB
2483d_sockaddr_sa_len (d_socket.U):
2484 This variable conditionally defines the HAS_SOCKADDR_SA_LEN symbol,
2485 which indicates that a struct sockaddr structure has the sa_len
2486 member.
2487
49a78c82
JH
2488d_sockatmark (d_sockatmark.U):
2489 This variable conditionally defines the HAS_SOCKATMARK symbol, which
2490 indicates to the C program that the sockatmark() routine is available.
2491
5af95cda
JH
2492d_sockatmarkproto (d_sockatmarkproto.U):
2493 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
2494 which indicates to the C program that the system provides
2495 a prototype for the sockatmark() function. Otherwise, it is
2496 up to the program to supply one.
2497
781b178c
JH
2498d_socket (d_socket.U):
2499 This variable conditionally defines HAS_SOCKET, which indicates
2500 that the BSD socket interface is supported.
2501
13b3f787
JH
2502d_socklen_t (d_socklen_t.U):
2503 This symbol will be defined if the C compiler supports socklen_t.
2504
781b178c
JH
2505d_sockpair (d_socket.U):
2506 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
2507 indicates that the BSD socketpair() is supported.
2508
6b356c8e
JH
2509d_socks5_init (d_socks5_init.U):
2510 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
2511 indicates to the C program that the socks5_init() routine is available.
2512
df4c34dc 2513d_sprintf_returns_strlen (d_sprintf_len.U):
78821a22
NC
2514 This variable defines whether sprintf returns the length of the string
2515 (as per the ANSI spec). Some C libraries retain compatibility with
2516 pre-ANSI C and return a pointer to the passed in buffer; for these
2517 this variable will be undef.
2518
68d4903c
JH
2519d_sqrtl (d_sqrtl.U):
2520 This variable conditionally defines the HAS_SQRTL symbol, which
2521 indicates to the C program that the sqrtl() routine is available.
2522
10bc17b6
JH
2523d_srand48_r (d_srand48_r.U):
2524 This variable conditionally defines the HAS_SRAND48_R symbol,
2525 which indicates to the C program that the srand48_r()
2526 routine is available.
2527
2528d_srandom_r (d_srandom_r.U):
2529 This variable conditionally defines the HAS_SRANDOM_R symbol,
2530 which indicates to the C program that the srandom_r()
2531 routine is available.
2532
eef837ea
JH
2533d_sresgproto (d_sresgproto.U):
2534 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
2535 which indicates to the C program that the system provides
2536 a prototype for the setresgid() function. Otherwise, it is
2537 up to the program to supply one.
2538
640374d0
JH
2539d_sresuproto (d_sresuproto.U):
2540 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
2541 which indicates to the C program that the system provides
2542 a prototype for the setresuid() function. Otherwise, it is
2543 up to the program to supply one.
2544
f40bbcbf
MB
2545d_stat (d_stat.U):
2546 This variable conditionally defines HAS_STAT if stat() is
2547 available to get file status.
2548
781b178c
JH
2549d_statblks (d_statblks.U):
2550 This variable conditionally defines USE_STAT_BLOCKS
2551 if this system has a stat structure declaring
2552 st_blksize and st_blocks.
2553
ea442100
JH
2554d_statfs_f_flags (d_statfs_f_flags.U):
2555 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
2556 symbol, which indicates to struct statfs from has f_flags member.
2557 This kind of struct statfs is coming from sys/mount.h (BSD),
2558 not from sys/statfs.h (SYSV).
2559
2560d_statfs_s (d_statfs_s.U):
2561 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
2562 which indicates that the struct statfs is supported.
2563
9e08e8f0
MB
2564d_static_inline (d_static_inline.U):
2565 This variable conditionally defines the HAS_STATIC_INLINE symbol,
2566 which indicates that the C compiler supports C99-style static
2567 inline. That is, the function can't be called from another
2568 translation unit.
2569
ea442100
JH
2570d_statvfs (d_statvfs.U):
2571 This variable conditionally defines the HAS_STATVFS symbol, which
2572 indicates to the C program that the statvfs() routine is available.
2573
781b178c
JH
2574d_stdio_cnt_lval (d_stdstdio.U):
2575 This variable conditionally defines STDIO_CNT_LVALUE if the
2576 FILE_cnt macro can be used as an lvalue.
2577
2578d_stdio_ptr_lval (d_stdstdio.U):
2579 This variable conditionally defines STDIO_PTR_LVALUE if the
2580 FILE_ptr macro can be used as an lvalue.
2581
a7ffa9b9
NC
2582d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
2583 This symbol is defined if using the FILE_ptr macro as an lvalue
2584 to increase the pointer by n leaves File_cnt(fp) unchanged.
2585
2586d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
2587 This symbol is defined if using the FILE_ptr macro as an lvalue
2588 to increase the pointer by n has the side effect of decreasing the
2589 value of File_cnt(fp) by n.
2590
781b178c
JH
2591d_stdio_stream_array (stdio_streams.U):
2592 This variable tells whether there is an array holding
2593 the stdio streams.
2594
2595d_stdiobase (d_stdstdio.U):
2596 This variable conditionally defines USE_STDIO_BASE if this system
2597 has a FILE structure declaring a usable _base field (or equivalent)
2598 in stdio.h.
2599
2600d_stdstdio (d_stdstdio.U):
2601 This variable conditionally defines USE_STDIO_PTR if this system
2602 has a FILE structure declaring usable _ptr and _cnt fields (or
2603 equivalent) in stdio.h.
2604
781b178c
JH
2605d_strchr (d_strchr.U):
2606 This variable conditionally defines HAS_STRCHR if strchr() and
2607 strrchr() are available for string searching.
2608
2609d_strcoll (d_strcoll.U):
2610 This variable conditionally defines HAS_STRCOLL if strcoll() is
2611 available to compare strings using collating information.
2612
2613d_strctcpy (d_strctcpy.U):
2614 This variable conditionally defines the USE_STRUCT_COPY symbol, which
2615 indicates to the C program that this C compiler knows how to copy
2616 structures.
2617
2618d_strerrm (d_strerror.U):
1332606d 2619 This variable holds what Strerror is defined as to translate an error
781b178c 2620 code condition into an error message string. It could be 'strerror'
1332606d 2621 or a more complex macro emulating strerror with sys_errlist[], or the
781b178c
JH
2622 "unknown" string when both strerror and sys_errlist are missing.
2623
2624d_strerror (d_strerror.U):
2625 This variable conditionally defines HAS_STRERROR if strerror() is
2626 available to translate error numbers to strings.
2627
884c85de
MB
2628d_strerror_l (d_strerror_l.U):
2629 This variable conditionally defines the HAS_STRERROR_L symbol, which
2630 indicates to the C program that the strerror_l() routine is available
2631 to return the error message for a given errno value in a particular
2632 locale (identified by a locale_t object).
2633
10bc17b6
JH
2634d_strerror_r (d_strerror_r.U):
2635 This variable conditionally defines the HAS_STRERROR_R symbol,
2636 which indicates to the C program that the strerror_r()
2637 routine is available.
2638
b3c85772
JH
2639d_strftime (d_strftime.U):
2640 This variable conditionally defines the HAS_STRFTIME symbol, which
2641 indicates to the C program that the strftime() routine is available.
2642
fd550ca5
MB
2643d_strlcat (d_strlcat.U):
2644 This variable conditionally defines the HAS_STRLCAT symbol, which
2645 indicates to the C program that the strlcat () routine is available.
2646
2647d_strlcpy (d_strlcpy.U):
2648 This variable conditionally defines the HAS_STRLCPY symbol, which
2649 indicates to the C program that the strlcpy () routine is available.
2650
781b178c
JH
2651d_strtod (d_strtod.U):
2652 This variable conditionally defines the HAS_STRTOD symbol, which
2653 indicates to the C program that the strtod() routine is available
2654 to provide better numeric string conversion than atof().
2655
2656d_strtol (d_strtol.U):
2657 This variable conditionally defines the HAS_STRTOL symbol, which
2658 indicates to the C program that the strtol() routine is available
2659 to provide better numeric string conversion than atoi() and friends.
2660
ff935051
JH
2661d_strtold (d_strtold.U):
2662 This variable conditionally defines the HAS_STRTOLD symbol, which
2663 indicates to the C program that the strtold() routine is available.
2664
76d49b1c
JH
2665d_strtoll (d_strtoll.U):
2666 This variable conditionally defines the HAS_STRTOLL symbol, which
2667 indicates to the C program that the strtoll() routine is available.
2668
d0e6d399
NC
2669d_strtoq (d_strtoq.U):
2670 This variable conditionally defines the HAS_STRTOQ symbol, which
2671 indicates to the C program that the strtoq() routine is available.
2672
781b178c
JH
2673d_strtoul (d_strtoul.U):
2674 This variable conditionally defines the HAS_STRTOUL symbol, which
2675 indicates to the C program that the strtoul() routine is available
2676 to provide conversion of strings to unsigned long.
2677
ff935051 2678d_strtoull (d_strtoull.U):
11dc3f68
JH
2679 This variable conditionally defines the HAS_STRTOULL symbol, which
2680 indicates to the C program that the strtoull() routine is available.
2681
ff935051
JH
2682d_strtouq (d_strtouq.U):
2683 This variable conditionally defines the HAS_STRTOUQ symbol, which
2684 indicates to the C program that the strtouq() routine is available.
2685
781b178c
JH
2686d_strxfrm (d_strxfrm.U):
2687 This variable conditionally defines HAS_STRXFRM if strxfrm() is
2688 available to transform strings.
2689
2690d_suidsafe (d_dosuid.U):
2691 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
2692 if setuid scripts can be secure. This test looks in /dev/fd/.
2693
2694d_symlink (d_symlink.U):
2695 This variable conditionally defines the HAS_SYMLINK symbol, which
2696 indicates to the C program that the symlink() routine is available
2697 to create symbolic links.
2698
2699d_syscall (d_syscall.U):
2700 This variable conditionally defines HAS_SYSCALL if syscall() is
2701 available call arbitrary system calls.
2702
5af95cda
JH
2703d_syscallproto (d_syscallproto.U):
2704 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
2705 which indicates to the C program that the system provides
2706 a prototype for the syscall() function. Otherwise, it is
2707 up to the program to supply one.
2708
781b178c
JH
2709d_sysconf (d_sysconf.U):
2710 This variable conditionally defines the HAS_SYSCONF symbol, which
2711 indicates to the C program that the sysconf() routine is available
2712 to determine system related limits and options.
2713
2714d_sysernlst (d_strerror.U):
2715 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
2716 is available to translate error numbers to the symbolic name.
2717
2718d_syserrlst (d_strerror.U):
2719 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
2720 available to translate error numbers to strings.
2721
2722d_system (d_system.U):
2723 This variable conditionally defines HAS_SYSTEM if system() is
2724 available to issue a shell command.
2725
2726d_tcgetpgrp (d_tcgtpgrp.U):
2727 This variable conditionally defines the HAS_TCGETPGRP symbol, which
2728 indicates to the C program that the tcgetpgrp() routine is available.
2729 to get foreground process group ID.
2730
2731d_tcsetpgrp (d_tcstpgrp.U):
2732 This variable conditionally defines the HAS_TCSETPGRP symbol, which
2733 indicates to the C program that the tcsetpgrp() routine is available
2734 to set foreground process group ID.
2735
781b178c
JH
2736d_telldir (d_readdir.U):
2737 This variable conditionally defines HAS_TELLDIR if telldir() is
2738 available.
2739
2740d_telldirproto (d_telldirproto.U):
2741 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
2742 which indicates to the C program that the system provides
2743 a prototype for the telldir() function. Otherwise, it is
2744 up to the program to supply one.
2745
427d28ce
JH
2746d_tgamma (d_tgamma.U):
2747 This variable conditionally defines the HAS_TGAMMA symbol, which
2748 indicates to the C program that the tgamma() routine is available
f40bbcbf 2749 for the gamma function. See also d_lgamma.
427d28ce 2750
781b178c
JH
2751d_time (d_time.U):
2752 This variable conditionally defines the HAS_TIME symbol, which indicates
47e01c32 2753 that the time() routine exists. The time() routine is normally
781b178c
JH
2754 provided on UNIX systems.
2755
cbb9e8a7
MB
2756d_timegm (d_timegm.U):
2757 This variable conditionally defines the HAS_TIMEGM symbol, which
2758 indicates to the C program that the timegm () routine is available.
2759
781b178c
JH
2760d_times (d_times.U):
2761 This variable conditionally defines the HAS_TIMES symbol, which indicates
47e01c32 2762 that the times() routine exists. The times() routine is normally
781b178c
JH
2763 provided on UNIX systems. You may have to include <sys/times.h>.
2764
511116db
JH
2765d_tm_tm_gmtoff (i_time.U):
2766 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
2767 indicates to the C program that the struct tm has the tm_gmtoff field.
2768
2769d_tm_tm_zone (i_time.U):
2770 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
2771 indicates to the C program that the struct tm has the tm_zone field.
2772
10bc17b6
JH
2773d_tmpnam_r (d_tmpnam_r.U):
2774 This variable conditionally defines the HAS_TMPNAM_R symbol,
2775 which indicates to the C program that the tmpnam_r()
2776 routine is available.
2777
427d28ce 2778d_trunc (d_trunc.U):
f40bbcbf 2779 This variable conditionally defines the HAS_TRUNC symbol, which
427d28ce
JH
2780 indicates to the C program that the trunc() routine is available
2781 to round doubles towards zero.
2782
f40bbcbf
MB
2783d_truncate (d_truncate.U):
2784 This variable conditionally defines HAS_TRUNCATE if truncate() is
2785 available to truncate files.
2786
4842dad7
JH
2787d_truncl (d_truncl.U):
2788 This variable conditionally defines the HAS_TRUNCL symbol, which
d6f85a58
MB
2789 indicates to the C program that the truncl() routine is available
2790 to round long doubles towards zero. If copysignl is also present,
2791 we can emulate modfl.
4842dad7 2792
10bc17b6
JH
2793d_ttyname_r (d_ttyname_r.U):
2794 This variable conditionally defines the HAS_TTYNAME_R symbol,
2795 which indicates to the C program that the ttyname_r()
2796 routine is available.
2797
781b178c
JH
2798d_tzname (d_tzname.U):
2799 This variable conditionally defines HAS_TZNAME if tzname[] is
2800 available to access timezone names.
2801
4e0554ec
JH
2802d_u32align (d_u32align.U):
2803 This variable tells whether you must access character data
2804 through U32-aligned pointers.
2805
2806d_ualarm (d_ualarm.U):
2807 This variable conditionally defines the HAS_UALARM symbol, which
2808 indicates to the C program that the ualarm() routine is available.
2809
781b178c
JH
2810d_umask (d_umask.U):
2811 This variable conditionally defines the HAS_UMASK symbol, which
2812 indicates to the C program that the umask() routine is available.
2813 to set and get the value of the file creation mask.
2814
2815d_uname (d_gethname.U):
2816 This variable conditionally defines the HAS_UNAME symbol, which
2817 indicates to the C program that the uname() routine may be
2818 used to derive the host name.
2819
2820d_union_semun (d_union_semun.U):
2821 This variable conditionally defines HAS_UNION_SEMUN if the
2822 union semun is defined by including <sys/sem.h>.
2823
758a5d79
JH
2824d_unordered (d_unordered.U):
2825 This variable conditionally defines the HAS_UNORDERED symbol, which
2826 indicates to the C program that the unordered() routine is available.
2827
bdf33aa7
SP
2828d_unsetenv (d_unsetenv.U):
2829 This variable conditionally defines the HAS_UNSETENV symbol, which
2830 indicates to the C program that the unsetenv () routine is available.
2831
ecb44b8e
MB
2832d_uselocale (d_newlocale.U):
2833 This variable conditionally defines the HAS_USELOCALE symbol, which
2834 indicates to the C program that the uselocale() routine is available
2835 to set the current locale for the calling thread.
2836
4e0554ec
JH
2837d_usleep (d_usleep.U):
2838 This variable conditionally defines HAS_USLEEP if usleep() is
2839 available to do high granularity sleeps.
2840
5af95cda
JH
2841d_usleepproto (d_usleepproto.U):
2842 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
2843 which indicates to the C program that the system provides
2844 a prototype for the usleep() function. Otherwise, it is
2845 up to the program to supply one.
2846
ea442100
JH
2847d_ustat (d_ustat.U):
2848 This variable conditionally defines HAS_USTAT if ustat() is
2849 available to query file system statistics by dev_t.
2850
526fdc24
MS
2851d_vendorarch (vendorarch.U):
2852 This variable conditionally defined PERL_VENDORARCH.
2853
0617aed7
JH
2854d_vendorbin (vendorbin.U):
2855 This variable conditionally defines PERL_VENDORBIN.
2856
a3635516
JH
2857d_vendorlib (vendorlib.U):
2858 This variable conditionally defines PERL_VENDORLIB.
2859
10305dfa
JH
2860d_vendorscript (vendorscript.U):
2861 This variable conditionally defines PERL_VENDORSCRIPT.
2862
781b178c
JH
2863d_vfork (d_vfork.U):
2864 This variable conditionally defines the HAS_VFORK symbol, which
2865 indicates the vfork() routine is available.
2866
2867d_void_closedir (d_closedir.U):
2868 This variable conditionally defines VOID_CLOSEDIR if closedir()
2869 does not return a value.
2870
2871d_voidsig (d_voidsig.U):
2872 This variable conditionally defines VOIDSIG if this system
2873 declares "void (*signal(...))()" in signal.h. The old way was to
2874 declare it as "int (*signal(...))()".
2875
2876d_voidtty (i_sysioctl.U):
2877 This variable conditionally defines USE_IOCNOTTY to indicate that the
2878 ioctl() call with TIOCNOTTY should be used to void tty association.
2879 Otherwise (on USG probably), it is enough to close the standard file
47e01c32 2880 descriptors and do a setpgrp().
781b178c
JH
2881
2882d_volatile (d_volatile.U):
2883 This variable conditionally defines the HASVOLATILE symbol, which
2884 indicates to the C program that this C compiler knows about the
2885 volatile declaration.
2886
2887d_vprintf (d_vprintf.U):
2888 This variable conditionally defines the HAS_VPRINTF symbol, which
2889 indicates to the C program that the vprintf() routine is available
2890 to printf with a pointer to an argument list.
2891
df4c34dc
MB
2892d_vsnprintf (d_snprintf.U):
2893 This variable conditionally defines the HAS_VSNPRINTF symbol, which
2894 indicates to the C program that the vsnprintf () library function
2895 is available.
2896
781b178c
JH
2897d_wait4 (d_wait4.U):
2898 This variable conditionally defines the HAS_WAIT4 symbol, which
2899 indicates the wait4() routine is available.
2900
2901d_waitpid (d_waitpid.U):
2902 This variable conditionally defines HAS_WAITPID if waitpid() is
2903 available to wait for child process.
2904
9cdcdad1
MB
2905d_wcscmp (d_wcscmp.U):
2906 This variable conditionally defines the HAS_WCSCMP symbol if the
2907 wcscmp() routine is available and can be used to compare wide
2908 character strings.
2909
781b178c
JH
2910d_wcstombs (d_wcstombs.U):
2911 This variable conditionally defines the HAS_WCSTOMBS symbol, which
2912 indicates to the C program that the wcstombs() routine is available
2913 to convert wide character strings to multibyte strings.
2914
9cdcdad1
MB
2915d_wcsxfrm (d_wcsxfrm.U):
2916 This variable conditionally defines the HAS_WCSXFRM symbol if the
2917 wcsxfrm() routine is available and can be used to compare wide
2918 character strings.
2919
781b178c
JH
2920d_wctomb (d_wctomb.U):
2921 This variable conditionally defines the HAS_WCTOMB symbol, which
2922 indicates to the C program that the wctomb() routine is available
2923 to convert a wide character to a multibyte.
2924
4e0554ec
JH
2925d_writev (d_writev.U):
2926 This variable conditionally defines the HAS_WRITEV symbol, which
2927 indicates to the C program that the writev() routine is available.
2928
781b178c
JH
2929d_xenix (Guess.U):
2930 This variable conditionally defines the symbol XENIX, which alerts
2931 the C program that it runs under Xenix.
2932
2933date (Loc.U):
5bf26616 2934 This variable is used internally by Configure to determine the
781b178c
JH
2935 full pathname (if any) of the date program. After Configure runs,
2936 the value is reset to a plain "date" and is not useful.
2937
2938db_hashtype (i_db.U):
2939 This variable contains the type of the hash structure element
2940 in the <db.h> header file. In older versions of DB, it was
2941 int, while in newer ones it is u_int32_t.
2942
2943db_prefixtype (i_db.U):
2944 This variable contains the type of the prefix structure element
2945 in the <db.h> header file. In older versions of DB, it was
2946 int, while in newer ones it is size_t.
2947
640374d0
JH
2948db_version_major (i_db.U):
2949 This variable contains the major version number of
2950 Berkeley DB found in the <db.h> header file.
2951
2952db_version_minor (i_db.U):
2953 This variable contains the minor version number of
2954 Berkeley DB found in the <db.h> header file.
2955 For DB version 1 this is always 0.
2956
2957db_version_patch (i_db.U):
2958 This variable contains the patch version number of
2959 Berkeley DB found in the <db.h> header file.
2960 For DB version 1 this is always 0.
2961
32db2dd3
MB
2962default_inc_excludes_dot (defaultincdot.U):
2963 When defined, remove the legacy '.' from @INC
2964
781b178c
JH
2965direntrytype (i_dirent.U):
2966 This symbol is set to 'struct direct' or 'struct dirent' depending on
2967 whether dirent is available or not. You should use this pseudo type to
2968 portably declare your directory entries.
2969
2970dlext (dlext.U):
2971 This variable contains the extension that is to be used for the
1332606d 2972 dynamically loaded modules that perl generates.
781b178c
JH
2973
2974dlsrc (dlsrc.U):
2975 This variable contains the name of the dynamic loading file that
2976 will be used with the package.
2977
44521f3a
JH
2978doubleinfbytes (infnan.U):
2979 This variable contains comma-separated list of hexadecimal bytes
2980 for the double precision infinity.
2981
f40bbcbf 2982doublekind (longdblfio.U):
bade9271 2983 This variable, if defined, encodes the type of a double:
aaca660c
AC
2984 1 = IEEE 754 32-bit little endian,
2985 2 = IEEE 754 32-bit big endian,
2986 3 = IEEE 754 64-bit little endian,
2987 4 = IEEE 754 64-bit big endian,
2988 5 = IEEE 754 128-bit little endian,
2989 6 = IEEE 754 128-bit big endian,
2990 7 = IEEE 754 64-bit mixed endian le-be,
2991 8 = IEEE 754 64-bit mixed endian be-le,
884c85de
MB
2992 9 = VAX 32bit little endian F float format
2993 10 = VAX 64bit little endian D float format
2994 11 = VAX 64bit little endian G float format
6e6b38ae
JH
2995 12 = IBM 32bit format
2996 13 = IBM 64bit format
2997 14 = Cray 64bit format
bade9271
JH
2998 -1 = unknown format.
2999
ed3917fd
JH
3000doublemantbits (mantbits.U):
3001 This symbol, if defined, tells how many mantissa bits
3002 there are in double precision floating point format.
3003 Note that this is usually DBL_MANT_DIG minus one, since
3004 with the standard IEEE 754 formats DBL_MANT_DIG includes
3005 the implicit bit which doesn't really exist.
3006
44521f3a
JH
3007doublenanbytes (infnan.U):
3008 This variable contains comma-separated list of hexadecimal bytes
3009 for the double precision not-a-number.
3010
781b178c
JH
3011doublesize (doublesize.U):
3012 This variable contains the value of the DOUBLESIZE symbol, which
3013 indicates to the C program how many bytes there are in a double.
3014
3015drand01 (randfunc.U):
3016 Indicates the macro to be used to generate normalized
3017 random numbers. Uses randfunc, often divided by
3018 (double) (((unsigned long) 1 << randbits)) in order to
3019 normalize the result.
3020 In C programs, the macro 'Drand01' is mapped to drand01.
3021
10bc17b6
JH
3022drand48_r_proto (d_drand48_r.U):
3023 This variable encodes the prototype of drand48_r.
39183afa
JH
3024 It is zero if d_drand48_r is undef, and one of the
3025 REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r
3026 is defined.
10bc17b6 3027
34f1896b
MB
3028dtrace (usedtrace.U):
3029 This variable holds the location of the dtrace executable.
3030
2640dfa8 3031dtraceobject (dtraceobject.U):
c2538af7
TC
3032 Whether we need to build an object file with the dtrace tool.
3033
f2a60c1f
TC
3034dtracexnolibs (dtraceobject.U):
3035 Whether dtrace accepts -xnolibs. If available we call dtrace -h
3036 and dtrace -G with -xnolibs to allow dtrace to run in a jail on
3037 FreeBSD.
3038
781b178c
JH
3039dynamic_ext (Extensions.U):
3040 This variable holds a list of XS extension files we want to
3041 link dynamically into the package. It is used by Makefile.
3042
3043eagain (nblock_io.U):
3044 This variable bears the symbolic errno code set by read() when no
3045 data is present on the file and non-blocking I/O was enabled (otherwise,
3046 read() blocks naturally).
3047
3048ebcdic (ebcdic.U):
3049 This variable conditionally defines EBCDIC if this
1332606d 3050 system uses EBCDIC encoding.
781b178c
JH
3051
3052echo (Loc.U):
5bf26616 3053 This variable is used internally by Configure to determine the
781b178c
JH
3054 full pathname (if any) of the echo program. After Configure runs,
3055 the value is reset to a plain "echo" and is not useful.
3056
3057egrep (Loc.U):
5bf26616 3058 This variable is used internally by Configure to determine the
781b178c
JH
3059 full pathname (if any) of the egrep program. After Configure runs,
3060 the value is reset to a plain "egrep" and is not useful.
3061
3062emacs (Loc.U):
3063 This variable is defined but not used by Configure.
fcdf39cf 3064 The value is the empty string and is not useful.
781b178c 3065
f40bbcbf 3066endgrent_r_proto (d_endgrent_r.U):
10bc17b6 3067 This variable encodes the prototype of endgrent_r.
39183afa
JH
3068 It is zero if d_endgrent_r is undef, and one of the
3069 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r
3070 is defined.
10bc17b6
JH
3071
3072endhostent_r_proto (d_endhostent_r.U):
3073 This variable encodes the prototype of endhostent_r.
39183afa
JH
3074 It is zero if d_endhostent_r is undef, and one of the
3075 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r
3076 is defined.
10bc17b6
JH
3077
3078endnetent_r_proto (d_endnetent_r.U):
3079 This variable encodes the prototype of endnetent_r.
39183afa
JH
3080 It is zero if d_endnetent_r is undef, and one of the
3081 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r
3082 is defined.
10bc17b6
JH
3083
3084endprotoent_r_proto (d_endprotoent_r.U):
3085 This variable encodes the prototype of endprotoent_r.
39183afa
JH
3086 It is zero if d_endprotoent_r is undef, and one of the
3087 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r
3088 is defined.
10bc17b6
JH
3089
3090endpwent_r_proto (d_endpwent_r.U):
3091 This variable encodes the prototype of endpwent_r.
39183afa
JH
3092 It is zero if d_endpwent_r is undef, and one of the
3093 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r
3094 is defined.
10bc17b6
JH
3095
3096endservent_r_proto (d_endservent_r.U):
3097 This variable encodes the prototype of endservent_r.
39183afa
JH
3098 It is zero if d_endservent_r is undef, and one of the
3099 REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r
3100 is defined.
10bc17b6 3101
781b178c
JH
3102eunicefix (Init.U):
3103 When running under Eunice this variable contains a command which will
3104 convert a shell script to the proper form of text file for it to be
3105 executable by the shell. On other systems it is a no-op.
3106
3107exe_ext (Unix.U):
3108 This is an old synonym for _exe.
3109
3110expr (Loc.U):
5bf26616 3111 This variable is used internally by Configure to determine the
781b178c
JH
3112 full pathname (if any) of the expr program. After Configure runs,
3113 the value is reset to a plain "expr" and is not useful.
3114
3115extensions (Extensions.U):
3116 This variable holds a list of all extension files (both XS and
f7b3892b 3117 non-xs) installed with the package. It is propagated to Config.pm
47e01c32 3118 and is typically used to test whether a particular extension
781b178c
JH
3119 is available.
3120
61c26d18
MHM
3121extern_C (Csym.U):
3122 ANSI C requires 'extern' where C++ requires 'extern "C"'. This
3123 variable can be used in Configure to do the right thing.
3124
cb7ddd31
JH
3125extras (Extras.U):
3126 This variable holds a list of extra modules to install.
3127
781b178c
JH
3128fflushall (fflushall.U):
3129 This symbol, if defined, tells that to flush
3130 all pending stdio output one must loop through all
3131 the stdio file handles stored in an array and fflush them.
3132 Note that if fflushNULL is defined, fflushall will not
3133 even be probed for and will be left undefined.
3134
4d54317a 3135fflushNULL (fflushall.U):
a05353bf
MB
3136 This symbol, if defined, tells that fflush(NULL) correctly
3137 flushes all pending stdio output without side effects. In
3138 particular, on some platforms calling fflush(NULL) *still*
3139 corrupts STDIN if it is a pipe.
4d54317a 3140
781b178c 3141find (Loc.U):
ff935051 3142 This variable is defined but not used by Configure.
fcdf39cf 3143 The value is the empty string and is not useful.
781b178c
JH
3144
3145firstmakefile (Unix.U):
3146 This variable defines the first file searched by make. On unix,
3147 it is makefile (then Makefile). On case-insensitive systems,
3148 it might be something else. This is only used to deal with
3149 convoluted make depend tricks.
3150
3151flex (Loc.U):
3152 This variable is defined but not used by Configure.
fcdf39cf 3153 The value is the empty string and is not useful.
781b178c 3154
a22e52b9
JH
3155fpossize (fpossize.U):
3156 This variable contains the size of a fpostype in bytes.
3157
781b178c 3158fpostype (fpostype.U):
635aebb7 3159 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
3160 uint, or whatever type is used to declare file positions in libc.
3161
3162freetype (mallocsrc.U):
3163 This variable contains the return type of free(). It is usually
3164 void, but occasionally int.
3165
5440bc8e
JH
3166from (Cross.U):
3167 This variable contains the command used by Configure
3168 to copy files from the target host. Useful and available
3169 only during Perl build.
3170 The string ':' if not cross-compiling.
3171
781b178c
JH
3172full_ar (Loc_ar.U):
3173 This variable contains the full pathname to 'ar', whether or
3174 not the user has specified 'portability'. This is only used
3175 in the Makefile.SH.
3176
3177full_csh (d_csh.U):
3178 This variable contains the full pathname to 'csh', whether or
3179 not the user has specified 'portability'. This is only used
3180 in the compiled C program, and we assume that all systems which
3181 can share this executable will have the same full pathname to
3182 'csh.'
3183
3184full_sed (Loc_sed.U):
3185 This variable contains the full pathname to 'sed', whether or
3186 not the user has specified 'portability'. This is only used
3187 in the compiled C program, and we assume that all systems which
3188 can share this executable will have the same full pathname to
3189 'sed.'
3190
123f32c0
MB
3191gccansipedantic (gccvers.U):
3192 If GNU cc (gcc) is used, this variable will enable (if set) the
3193 -ansi and -pedantic ccflags for building core files (through
3194 cflags script). (See Porting/pumpkin.pod for full description).
3195
af960fef 3196gccosandvers (gccvers.U):
123f32c0
MB
3197 If GNU cc (gcc) is used, this variable holds the operating system
3198 and version used to compile gcc. It is set to '' if not gcc,
af960fef
JH
3199 or if nothing useful can be parsed as the os version.
3200
3201gccversion (gccvers.U):
123f32c0 3202 If GNU cc (gcc) is used, this variable holds '1' or '2' to
781b178c
JH
3203 indicate whether the compiler is version 1 or 2. This is used in
3204 setting some of the default cflags. It is set to '' if not gcc.
3205
10bc17b6
JH
3206getgrent_r_proto (d_getgrent_r.U):
3207 This variable encodes the prototype of getgrent_r.
39183afa
JH
3208 It is zero if d_getgrent_r is undef, and one of the
3209 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r
3210 is defined.
10bc17b6
JH
3211
3212getgrgid_r_proto (d_getgrgid_r.U):
3213 This variable encodes the prototype of getgrgid_r.
39183afa
JH
3214 It is zero if d_getgrgid_r is undef, and one of the
3215 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r
3216 is defined.
10bc17b6
JH
3217
3218getgrnam_r_proto (d_getgrnam_r.U):
3219 This variable encodes the prototype of getgrnam_r.
39183afa
JH
3220 It is zero if d_getgrnam_r is undef, and one of the
3221 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r
3222 is defined.
10bc17b6
JH
3223
3224gethostbyaddr_r_proto (d_gethostbyaddr_r.U):
3225 This variable encodes the prototype of gethostbyaddr_r.
39183afa
JH
3226 It is zero if d_gethostbyaddr_r is undef, and one of the
3227 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r
3228 is defined.
10bc17b6
JH
3229
3230gethostbyname_r_proto (d_gethostbyname_r.U):
3231 This variable encodes the prototype of gethostbyname_r.
39183afa
JH
3232 It is zero if d_gethostbyname_r is undef, and one of the
3233 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r
3234 is defined.
10bc17b6
JH
3235
3236gethostent_r_proto (d_gethostent_r.U):
3237 This variable encodes the prototype of gethostent_r.
39183afa
JH
3238 It is zero if d_gethostent_r is undef, and one of the
3239 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r
3240 is defined.
10bc17b6
JH
3241
3242getlogin_r_proto (d_getlogin_r.U):
3243 This variable encodes the prototype of getlogin_r.
39183afa
JH
3244 It is zero if d_getlogin_r is undef, and one of the
3245 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r
3246 is defined.
10bc17b6
JH
3247
3248getnetbyaddr_r_proto (d_getnetbyaddr_r.U):
3249 This variable encodes the prototype of getnetbyaddr_r.
39183afa
JH
3250 It is zero if d_getnetbyaddr_r is undef, and one of the
3251 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r
3252 is defined.
10bc17b6
JH
3253
3254getnetbyname_r_proto (d_getnetbyname_r.U):
3255 This variable encodes the prototype of getnetbyname_r.
39183afa
JH
3256 It is zero if d_getnetbyname_r is undef, and one of the
3257 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r
3258 is defined.
10bc17b6
JH
3259
3260getnetent_r_proto (d_getnetent_r.U):
3261 This variable encodes the prototype of getnetent_r.
39183afa
JH
3262 It is zero if d_getnetent_r is undef, and one of the
3263 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r
3264 is defined.
10bc17b6
JH
3265
3266getprotobyname_r_proto (d_getprotobyname_r.U):
3267 This variable encodes the prototype of getprotobyname_r.
39183afa
JH
3268 It is zero if d_getprotobyname_r is undef, and one of the
3269 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r
3270 is defined.
10bc17b6
JH
3271
3272getprotobynumber_r_proto (d_getprotobynumber_r.U):
3273 This variable encodes the prototype of getprotobynumber_r.
39183afa
JH
3274 It is zero if d_getprotobynumber_r is undef, and one of the
3275 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r
3276 is defined.
10bc17b6
JH
3277
3278getprotoent_r_proto (d_getprotoent_r.U):
3279 This variable encodes the prototype of getprotoent_r.
39183afa
JH
3280 It is zero if d_getprotoent_r is undef, and one of the
3281 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r
3282 is defined.
10bc17b6
JH
3283
3284getpwent_r_proto (d_getpwent_r.U):
3285 This variable encodes the prototype of getpwent_r.
39183afa
JH
3286 It is zero if d_getpwent_r is undef, and one of the
3287 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r
3288 is defined.
10bc17b6
JH
3289
3290getpwnam_r_proto (d_getpwnam_r.U):
3291 This variable encodes the prototype of getpwnam_r.
39183afa
JH
3292 It is zero if d_getpwnam_r is undef, and one of the
3293 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r
3294 is defined.
10bc17b6
JH
3295
3296getpwuid_r_proto (d_getpwuid_r.U):
3297 This variable encodes the prototype of getpwuid_r.
39183afa
JH
3298 It is zero if d_getpwuid_r is undef, and one of the
3299 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r
3300 is defined.
10bc17b6
JH
3301
3302getservbyname_r_proto (d_getservbyname_r.U):
3303 This variable encodes the prototype of getservbyname_r.
39183afa
JH
3304 It is zero if d_getservbyname_r is undef, and one of the
3305 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r
3306 is defined.
10bc17b6
JH
3307
3308getservbyport_r_proto (d_getservbyport_r.U):
3309 This variable encodes the prototype of getservbyport_r.
39183afa
JH
3310 It is zero if d_getservbyport_r is undef, and one of the
3311 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r
3312 is defined.
10bc17b6
JH
3313
3314getservent_r_proto (d_getservent_r.U):
3315 This variable encodes the prototype of getservent_r.
39183afa
JH
3316 It is zero if d_getservent_r is undef, and one of the
3317 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r
3318 is defined.
10bc17b6
JH
3319
3320getspnam_r_proto (d_getspnam_r.U):
3321 This variable encodes the prototype of getspnam_r.
39183afa
JH
3322 It is zero if d_getspnam_r is undef, and one of the
3323 REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r
3324 is defined.
10bc17b6 3325
a22e52b9
JH
3326gidformat (gidf.U):
3327 This variable contains the format string used for printing a Gid_t.
3328
785fb66b
JH
3329gidsign (gidsign.U):
3330 This variable contains the signedness of a gidtype.
3331 1 for unsigned, -1 for signed.
3332
3333gidsize (gidsize.U):
3334 This variable contains the size of a gidtype in bytes.
3335
781b178c
JH
3336gidtype (gidtype.U):
3337 This variable defines Gid_t to be something like gid_t, int,
3338 ushort, or whatever type is used to declare the return type
3339 of getgid(). Typically, it is the type of group ids in the kernel.
3340
3341glibpth (libpth.U):
3342 This variable holds the general path (space-separated) used to
3343 find libraries. It may contain directories that do not exist on
3344 this platform, libpth is the cleaned-up version.
3345
c68a00c0
JH
3346gmake (Loc.U):
3347 This variable is used internally by Configure to determine the
3348 full pathname (if any) of the gmake program. After Configure runs,
3349 the value is reset to a plain "gmake" and is not useful.
3350
10bc17b6
JH
3351gmtime_r_proto (d_gmtime_r.U):
3352 This variable encodes the prototype of gmtime_r.
39183afa
JH
3353 It is zero if d_gmtime_r is undef, and one of the
3354 REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r
3355 is defined.
10bc17b6 3356
00fac743
JH
3357gnulibc_version (d_gnulibc.U):
3358 This variable contains the version number of the GNU C library.
3359 It is usually something like '2.2.5'. It is a plain '' if this
3360 is not the GNU C library, or if the version is unknown.
3361
781b178c 3362grep (Loc.U):
5bf26616 3363 This variable is used internally by Configure to determine the
781b178c
JH
3364 full pathname (if any) of the grep program. After Configure runs,
3365 the value is reset to a plain "grep" and is not useful.
3366
3367groupcat (nis.U):
3368 This variable contains a command that produces the text of the
3369 /etc/group file. This is normally "cat /etc/group", but can be
3370 "ypcat group" when NIS is used.
aaacdc8b
GS
3371 On some systems, such as os390, there may be no equivalent
3372 command, in which case this variable is unset.
781b178c
JH
3373
3374groupstype (groupstype.U):
635aebb7 3375 This variable defines Groups_t to be something like gid_t, int,
781b178c
JH
3376 ushort, or whatever type is used for the second argument to
3377 getgroups() and setgroups(). Usually, this is the same as
3378 gidtype (gid_t), but sometimes it isn't.
3379
3380gzip (Loc.U):
5bf26616 3381 This variable is used internally by Configure to determine the
781b178c
JH
3382 full pathname (if any) of the gzip program. After Configure runs,
3383 the value is reset to a plain "gzip" and is not useful.
3384
3385h_fcntl (h_fcntl.U):
3386 This is variable gets set in various places to tell i_fcntl that
3387 <fcntl.h> should be included.
3388
3389h_sysfile (h_sysfile.U):
3390 This is variable gets set in various places to tell i_sys_file that
3391 <sys/file.h> should be included.
3392
3393hint (Oldconfig.U):
3394 Gives the type of hints used for previous answers. May be one of
3395 "default", "recommended" or "previous".
3396
1d38f63f
MB
3397hostcat (nis.U):
3398 This variable contains a command that produces the text of the
3399 /etc/hosts file. This is normally "cat /etc/hosts", but can be
3400 "ypcat hosts" when NIS is used.
3401 On some systems, such as os390, there may be no equivalent
3402 command, in which case this variable is unset.
8b6a017c 3403
a6d9d244 3404hostgenerate (Cross.U):
8b6a017c
BF
3405 This variable contains the path to a generate_uudmap binary that
3406 can be run on the host OS when cross-compiling. Useful and
3407 available only during Perl build.
3408 Empty string '' if not cross-compiling.
3409
a6d9d244 3410hostosname (Cross.U):
8b6a017c
BF
3411 This variable contains the original value of '$^O' for hostperl
3412 when cross-compiling. This is useful to pick the proper tools
3413 when running build code in the host.
3414 Empty string '' if not cross-compiling.
3415
1d38f63f
MB
3416hostperl (Cross.U):
3417 This variable contains the path to a miniperl binary that can be
3418 run on the host OS when cross-compiling. Useful and available only
3419 during Perl build.
3420 Empty string '' if not cross-compiling.
781b178c 3421
10305dfa
JH
3422html1dir (html1dir.U):
3423 This variable contains the name of the directory in which html
3424 source pages are to be put. This directory is for pages
3425 that describe whole programs, not libraries or modules. It
3426 is intended to correspond roughly to section 1 of the Unix
3427 manuals.
3428
3429html1direxp (html1dir.U):
3430 This variable is the same as the html1dir variable, but is filename
3431 expanded at configuration time, for convenient use in makefiles.
3432
3433html3dir (html3dir.U):
3434 This variable contains the name of the directory in which html
3435 source pages are to be put. This directory is for pages
3436 that describe libraries or modules. It is intended to
3437 correspond roughly to section 3 of the Unix manuals.
3438
3439html3direxp (html3dir.U):
3440 This variable is the same as the html3dir variable, but is filename
3441 expanded at configuration time, for convenient use in makefiles.
3442
a22e52b9
JH
3443i16size (perlxv.U):
3444 This variable is the size of an I16 in bytes.
3445
3446i16type (perlxv.U):
3447 This variable contains the C type used for Perl's I16.
3448
3449i32size (perlxv.U):
3450 This variable is the size of an I32 in bytes.
3451
3452i32type (perlxv.U):
3453 This variable contains the C type used for Perl's I32.
3454
3455i64size (perlxv.U):
3456 This variable is the size of an I64 in bytes.
3457
3458i64type (perlxv.U):
3459 This variable contains the C type used for Perl's I64.
3460
3461i8size (perlxv.U):
3462 This variable is the size of an I8 in bytes.
3463
3464i8type (perlxv.U):
3465 This variable contains the C type used for Perl's I8.
3466
781b178c
JH
3467i_arpainet (i_arpainet.U):
3468 This variable conditionally defines the I_ARPA_INET symbol,
3469 and indicates whether a C program should include <arpa/inet.h>.
3470
2a0de2c5
NC
3471i_assert (i_assert.U):
3472 This variable conditionally defines the I_ASSERT symbol, which
c0bacbef
MB
3473 indicates to the C program that <assert.h> exists and could be
3474 included.
2a0de2c5 3475
f6a82ade
MB
3476i_bfd (i_bfd.U):
3477 This variable conditionally defines the I_BFD symbol, and
3478 indicates whether a C program can include <bfd.h>.
3479
781b178c
JH
3480i_bsdioctl (i_sysioctl.U):
3481 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
3482 indicates to the C program that <sys/bsdioctl.h> exists and should
3483 be included.
3484
10bc17b6
JH
3485i_crypt (i_crypt.U):
3486 This variable conditionally defines the I_CRYPT symbol, and indicates
3487 whether a C program should include <crypt.h>.
3488
781b178c
JH
3489i_db (i_db.U):
3490 This variable conditionally defines the I_DB symbol, and indicates
3491 whether a C program may include Berkeley's DB include file <db.h>.
3492
3493i_dbm (i_dbm.U):
3494 This variable conditionally defines the I_DBM symbol, which
3495 indicates to the C program that <dbm.h> exists and should
3496 be included.
3497
3498i_dirent (i_dirent.U):
3499 This variable conditionally defines I_DIRENT, which indicates
3500 to the C program that it should include <dirent.h>.
3501
781b178c
JH
3502i_dlfcn (i_dlfcn.U):
3503 This variable conditionally defines the I_DLFCN symbol, which
3504 indicates to the C program that <dlfcn.h> exists and should
3505 be included.
3506
f6a82ade
MB
3507i_execinfo (i_execinfo.U):
3508 This variable conditionally defines the I_EXECINFO symbol, and indicates
3509 whether a C program may include <execinfo.h>, for backtrace() support.
3510
781b178c
JH
3511i_fcntl (i_fcntl.U):
3512 This variable controls the value of I_FCNTL (which tells
3513 the C program to include <fcntl.h>).
3514
d0166596
MB
3515i_fenv (i_fenv.U):
3516 This variable conditionally defines the I_FENV symbol, which
3517 indicates to the C program that <fenv.h> exists and should
3518 be included.
3519
781b178c
JH
3520i_float (i_float.U):
3521 This variable conditionally defines the I_FLOAT symbol, and indicates
3522 whether a C program may include <float.h> to get symbols like DBL_MAX
3523 or DBL_MIN, i.e. machine dependent floating point values.
3524
758a5d79
JH
3525i_fp (i_fp.U):
3526 This variable conditionally defines the I_FP symbol, and indicates
3527 whether a C program should include <fp.h>.
3528
3529i_fp_class (i_fp_class.U):
3530 This variable conditionally defines the I_FP_CLASS symbol, and indicates
3531 whether a C program should include <fp_class.h>.
3532
781b178c
JH
3533i_gdbm (i_gdbm.U):
3534 This variable conditionally defines the I_GDBM symbol, which
3535 indicates to the C program that <gdbm.h> exists and should
3536 be included.
3537
a33f2d9f
AD
3538i_gdbm_ndbm (i_ndbm.U):
3539 This variable conditionally defines the I_GDBM_NDBM symbol, which
3540 indicates to the C program that <gdbm-ndbm.h> exists and should
3541 be included. This is the location of the ndbm.h compatibility file
3542 in Debian 4.0.
3543
3544i_gdbmndbm (i_ndbm.U):
3545 This variable conditionally defines the I_GDBMNDBM symbol, which
3546 indicates to the C program that <gdbm/ndbm.h> exists and should
3547 be included. This was the location of the ndbm.h compatibility file
3548 in RedHat 7.1.
3549
781b178c
JH
3550i_grp (i_grp.U):
3551 This variable conditionally defines the I_GRP symbol, and indicates
3552 whether a C program should include <grp.h>.
3553
792d8dab
JH
3554i_ieeefp (i_ieeefp.U):
3555 This variable conditionally defines the I_IEEEFP symbol, and indicates
3556 whether a C program should include <ieeefp.h>.
3557
781b178c
JH
3558i_inttypes (i_inttypes.U):
3559 This variable conditionally defines the I_INTTYPES symbol,
3560 and indicates whether a C program should include <inttypes.h>.
3561
2765b840
JH
3562i_langinfo (i_langinfo.U):
3563 This variable conditionally defines the I_LANGINFO symbol,
3564 and indicates whether a C program should include <langinfo.h>.
3565
af960fef
JH
3566i_libutil (i_libutil.U):
3567 This variable conditionally defines the I_LIBUTIL symbol, and indicates
3568 whether a C program should include <libutil.h>.
3569
781b178c
JH
3570i_limits (i_limits.U):
3571 This variable conditionally defines the I_LIMITS symbol, and indicates
3572 whether a C program may include <limits.h> to get symbols like WORD_BIT
3573 and friends.
3574
3575i_locale (i_locale.U):
3576 This variable conditionally defines the I_LOCALE symbol,
3577 and indicates whether a C program should include <locale.h>.
3578
3579i_machcthr (i_machcthr.U):
3580 This variable conditionally defines the I_MACH_CTHREADS symbol,
3581 and indicates whether a C program should include <mach/cthreads.h>.
3582
3583i_malloc (i_malloc.U):
3584 This variable conditionally defines the I_MALLOC symbol, and indicates
3585 whether a C program should include <malloc.h>.
3586
1cd66f7c
DD
3587i_mallocmalloc (i_mallocmalloc.U):
3588 This variable conditionally defines the I_MALLOCMALLOC symbol,
3589 and indicates whether a C program should include <malloc/malloc.h>.
3590
781b178c
JH
3591i_math (i_math.U):
3592 This variable conditionally defines the I_MATH symbol, and indicates
3593 whether a C program may include <math.h>.
3594
3595i_memory (i_memory.U):
3596 This variable conditionally defines the I_MEMORY symbol, and indicates
3597 whether a C program should include <memory.h>.
3598
ea442100
JH
3599i_mntent (i_mntent.U):
3600 This variable conditionally defines the I_MNTENT symbol, and indicates
3601 whether a C program should include <mntent.h>.
3602
781b178c
JH
3603i_ndbm (i_ndbm.U):
3604 This variable conditionally defines the I_NDBM symbol, which
3605 indicates to the C program that <ndbm.h> exists and should
3606 be included.
3607
3608i_netdb (i_netdb.U):
3609 This variable conditionally defines the I_NETDB symbol, and indicates
3610 whether a C program should include <netdb.h>.
3611
3612i_neterrno (i_neterrno.U):
3613 This variable conditionally defines the I_NET_ERRNO symbol, which
3614 indicates to the C program that <net/errno.h> exists and should
3615 be included.
3616
3617i_netinettcp (i_netinettcp.U):
3618 This variable conditionally defines the I_NETINET_TCP symbol,
3619 and indicates whether a C program should include <netinet/tcp.h>.
3620
3621i_niin (i_niin.U):
3622 This variable conditionally defines I_NETINET_IN, which indicates
3623 to the C program that it should include <netinet/in.h>. Otherwise,
3624 you may try <sys/in.h>.
3625
3626i_poll (i_poll.U):
3627 This variable conditionally defines the I_POLL symbol, and indicates
3628 whether a C program should include <poll.h>.
3629
3813c136
JH
3630i_prot (i_prot.U):
3631 This variable conditionally defines the I_PROT symbol, and indicates
3632 whether a C program should include <prot.h>.
3633
781b178c 3634i_pthread (i_pthread.U):
190b66db 3635 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
3636 and indicates whether a C program should include <pthread.h>.
3637
3638i_pwd (i_pwd.U):
3639 This variable conditionally defines I_PWD, which indicates
3640 to the C program that it should include <pwd.h>.
3641
4e5044f0
JH
3642i_quadmath (i_quadmath.U):
3643 This variable conditionally defines I_QUADMATH, which indicates
3644 to the C program that it should include <quadmath.h>.
3645
781b178c
JH
3646i_rpcsvcdbm (i_dbm.U):
3647 This variable conditionally defines the I_RPCSVC_DBM symbol, which
3648 indicates to the C program that <rpcsvc/dbm.h> exists and should
3649 be included. Some System V systems might need this instead of <dbm.h>.
3650
781b178c
JH
3651i_sgtty (i_termio.U):
3652 This variable conditionally defines the I_SGTTY symbol, which
3653 indicates to the C program that it should include <sgtty.h> rather
3654 than <termio.h>.
3655
3656i_shadow (i_shadow.U):
3657 This variable conditionally defines the I_SHADOW symbol, and indicates
3658 whether a C program should include <shadow.h>.
3659
3660i_socks (i_socks.U):
3661 This variable conditionally defines the I_SOCKS symbol, and indicates
3662 whether a C program should include <socks.h>.
3663
3664i_stdarg (i_varhdr.U):
3665 This variable conditionally defines the I_STDARG symbol, which
3666 indicates to the C program that <stdarg.h> exists and should
3667 be included.
3668
bd31be4b
NC
3669i_stdbool (i_stdbool.U):
3670 This variable conditionally defines the I_STDBOOL symbol, which
3671 indicates to the C program that <stdbool.h> exists and should
3672 be included.
3673
781b178c
JH
3674i_stddef (i_stddef.U):
3675 This variable conditionally defines the I_STDDEF symbol, which
3676 indicates to the C program that <stddef.h> exists and should
3677 be included.
3678
83f6d82b
JH
3679i_stdint (i_stdint.U):
3680 This variable conditionally defines the I_STDINT symbol, which
3681 indicates to the C program that <stdint.h> exists and should
3682 be included.
3683
781b178c
JH
3684i_stdlib (i_stdlib.U):
3685 This variable conditionally defines the I_STDLIB symbol, which
3686 indicates to the C program that <stdlib.h> exists and should
3687 be included.
3688
3689i_string (i_string.U):
3690 This variable conditionally defines the I_STRING symbol, which
3691 indicates that <string.h> should be included rather than <strings.h>.
3692
792d8dab
JH
3693i_sunmath (i_sunmath.U):
3694 This variable conditionally defines the I_SUNMATH symbol, and indicates
3695 whether a C program should include <sunmath.h>.
3696
781b178c
JH
3697i_sysaccess (i_sysaccess.U):
3698 This variable conditionally defines the I_SYS_ACCESS symbol,
3699 and indicates whether a C program should include <sys/access.h>.
3700
3701i_sysdir (i_sysdir.U):
3702 This variable conditionally defines the I_SYS_DIR symbol, and indicates
3703 whether a C program should include <sys/dir.h>.
3704
3705i_sysfile (i_sysfile.U):
3706 This variable conditionally defines the I_SYS_FILE symbol, and indicates
3707 whether a C program should include <sys/file.h> to get R_OK and friends.
3708
3709i_sysfilio (i_sysioctl.U):
3710 This variable conditionally defines the I_SYS_FILIO symbol, which
3711 indicates to the C program that <sys/filio.h> exists and should
3712 be included in preference to <sys/ioctl.h>.
3713
3714i_sysin (i_niin.U):
3715 This variable conditionally defines I_SYS_IN, which indicates
3716 to the C program that it should include <sys/in.h> instead of
3717 <netinet/in.h>.
3718
3719i_sysioctl (i_sysioctl.U):
3720 This variable conditionally defines the I_SYS_IOCTL symbol, which
3721 indicates to the C program that <sys/ioctl.h> exists and should
3722 be included.
3723
ca52efda
JH
3724i_syslog (i_syslog.U):
3725 This variable conditionally defines the I_SYSLOG symbol,
3726 and indicates whether a C program should include <syslog.h>.
3727
fe749a9f
JH
3728i_sysmman (i_sysmman.U):
3729 This variable conditionally defines the I_SYS_MMAN symbol, and
3730 indicates whether a C program should include <sys/mman.h>.
3731
87b71857
JH
3732i_sysmode (i_sysmode.U):
3733 This variable conditionally defines the I_SYSMODE symbol,
3734 and indicates whether a C program should include <sys/mode.h>.
3735
ea442100
JH
3736i_sysmount (i_sysmount.U):
3737 This variable conditionally defines the I_SYSMOUNT symbol,
3738 and indicates whether a C program should include <sys/mount.h>.
3739
781b178c
JH
3740i_sysndir (i_sysndir.U):
3741 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
3742 whether a C program should include <sys/ndir.h>.
3743
3744i_sysparam (i_sysparam.U):
3745 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
3746 whether a C program should include <sys/param.h>.
3747
216dac04
MB
3748i_syspoll (i_syspoll.U):
3749 This variable conditionally defines the I_SYS_POLL symbol, which
3750 indicates to the C program that it should include <sys/poll.h>.
3751
781b178c
JH
3752i_sysresrc (i_sysresrc.U):
3753 This variable conditionally defines the I_SYS_RESOURCE symbol,
3754 and indicates whether a C program should include <sys/resource.h>.
3755
3756i_syssecrt (i_syssecrt.U):
3757 This variable conditionally defines the I_SYS_SECURITY symbol,
3758 and indicates whether a C program should include <sys/security.h>.
3759
3760i_sysselct (i_sysselct.U):
3761 This variable conditionally defines I_SYS_SELECT, which indicates
3762 to the C program that it should include <sys/select.h> in order to
3763 get the definition of struct timeval.
3764
3765i_syssockio (i_sysioctl.U):
3766 This variable conditionally defines I_SYS_SOCKIO to indicate to the
3767 C program that socket ioctl codes may be found in <sys/sockio.h>
3768 instead of <sys/ioctl.h>.
3769
3770i_sysstat (i_sysstat.U):
3771 This variable conditionally defines the I_SYS_STAT symbol,
3772 and indicates whether a C program should include <sys/stat.h>.
3773
ea442100
JH
3774i_sysstatfs (i_sysstatfs.U):
3775 This variable conditionally defines the I_SYSSTATFS symbol,
3776 and indicates whether a C program should include <sys/statfs.h>.
3777
3778i_sysstatvfs (i_sysstatvfs.U):
3779 This variable conditionally defines the I_SYSSTATVFS symbol,
3780 and indicates whether a C program should include <sys/statvfs.h>.
3781
781b178c
JH
3782i_systime (i_time.U):
3783 This variable conditionally defines I_SYS_TIME, which indicates
3784 to the C program that it should include <sys/time.h>.
3785
3786i_systimek (i_time.U):
3787 This variable conditionally defines I_SYS_TIME_KERNEL, which
3788 indicates to the C program that it should include <sys/time.h>
3789 with KERNEL defined.
3790
3791i_systimes (i_systimes.U):
3792 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
3793 whether a C program should include <sys/times.h>.
3794
3795i_systypes (i_systypes.U):
3796 This variable conditionally defines the I_SYS_TYPES symbol,
3797 and indicates whether a C program should include <sys/types.h>.
3798
3799i_sysuio (i_sysuio.U):
3800 This variable conditionally defines the I_SYSUIO symbol, and indicates
3801 whether a C program should include <sys/uio.h>.
3802
3803i_sysun (i_sysun.U):
3804 This variable conditionally defines I_SYS_UN, which indicates
3805 to the C program that it should include <sys/un.h> to get UNIX
3806 domain socket definitions.
3807
d4935d7f
JH
3808i_sysutsname (i_sysutsname.U):
3809 This variable conditionally defines the I_SYSUTSNAME symbol,
3810 and indicates whether a C program should include <sys/utsname.h>.
3811
ea442100
JH
3812i_sysvfs (i_sysvfs.U):
3813 This variable conditionally defines the I_SYSVFS symbol,
3814 and indicates whether