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1This file contains a description of all the shell variables whose value is
2determined by the Configure script. Variables intended for use in C
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3programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4generates pod documentation for Config.pm from this file--please try to keep
5the formatting regular.]
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7_a (Unix.U):
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
11
12_exe (Unix.U):
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
15
16_o (Unix.U):
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
20
21afs (afs.U):
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
25 what you are doing.
26
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27afsroot (afs.U):
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
32
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33alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
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35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
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37
38ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
41
42aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
46
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47api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
53 like 5.00563.
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
69
70api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
75 full details.
76
77api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
85
86api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
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90
91ar (Loc.U):
5bf26616 92 This variable is used internally by Configure to determine the
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93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
95
96archlib (archlib.U):
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
102
103archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
106
107archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
109
110archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
113
114archobjs (Unix.U):
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
119 include os2/os2.obj.
120
121awk (Loc.U):
5bf26616 122 This variable is used internally by Configure to determine the
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123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
125
126baserev (baserev.U):
127 The base revision level of this package, from the .package file.
128
129bash (Loc.U):
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
132
133bin (bin.U):
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
138
d71b2b6b 139bincompat5005 (bincompat5005.U):
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140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
d71b2b6b 142
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143binexp (bin.U):
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
146
147bison (Loc.U):
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148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
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151
152byacc (Loc.U):
5bf26616 153 This variable is used internally by Configure to determine the
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154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
156
157byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
162
163c (n.U):
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
167
168castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
171 0 = ok
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
175
176cat (Loc.U):
5bf26616 177 This variable is used internally by Configure to determine the
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178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
180
181cc (cc.U):
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
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184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
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186
187cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
192
193ccdlflags (dlsrc.U):
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
197 be empty.
198
199ccflags (ccflags.U):
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
202
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203ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
206
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207ccname (Checkcc.U):
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
213
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214ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
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216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
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218 The list is a space-separated list of symbol=value tokens.
219
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220ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
223 the compiler.
224
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225cf_by (cf_who.U):
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
228
229cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
232
233cf_time (cf_who.U):
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
236
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237charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
240
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241chgrp (Loc.U):
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
244
245chmod (Loc.U):
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246 This variable is used internally by Configure to determine the
247 full pathname (if any) of the chmod program. After Configure runs,
248 the value is reset to a plain "chmod" and is not useful.
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249
250chown (Loc.U):
251 This variable is defined but not used by Configure.
252 The value is a plain '' and is not useful.
253
254clocktype (d_times.U):
255 This variable holds the type returned by times(). It can be long,
256 or clock_t on BSD sites (in which case <sys/types.h> should be
257 included).
258
259comm (Loc.U):
5bf26616 260 This variable is used internally by Configure to determine the
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261 full pathname (if any) of the comm program. After Configure runs,
262 the value is reset to a plain "comm" and is not useful.
263
264compress (Loc.U):
265 This variable is defined but not used by Configure.
266 The value is a plain '' and is not useful.
267
268contains (contains.U):
269 This variable holds the command to do a grep with a proper return
270 status. On most sane systems it is simply "grep". On insane systems
271 it is a grep followed by a cat followed by a test. This variable
272 is primarily for the use of other Configure units.
273
274cp (Loc.U):
5bf26616 275 This variable is used internally by Configure to determine the
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276 full pathname (if any) of the cp program. After Configure runs,
277 the value is reset to a plain "cp" and is not useful.
278
279cpio (Loc.U):
280 This variable is defined but not used by Configure.
281 The value is a plain '' and is not useful.
282
283cpp (Loc.U):
5bf26616 284 This variable is used internally by Configure to determine the
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285 full pathname (if any) of the cpp program. After Configure runs,
286 the value is reset to a plain "cpp" and is not useful.
287
288cpp_stuff (cpp_stuff.U):
289 This variable contains an identification of the catenation mechanism
290 used by the C preprocessor.
291
292cppccsymbols (Cppsym.U):
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293 The variable contains the symbols defined by the C compiler
294 when it calls cpp. The symbols defined by the cc alone or cpp
295 alone are not in this list, see ccsymbols and cppsymbols.
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296 The list is a space-separated list of symbol=value tokens.
297
298cppflags (ccflags.U):
299 This variable holds the flags that will be passed to the C pre-
300 processor. It is up to the Makefile to use it.
301
302cpplast (cppstdin.U):
303 This variable has the same functionality as cppminus, only it applies
304 to cpprun and not cppstdin.
305
306cppminus (cppstdin.U):
307 This variable contains the second part of the string which will invoke
308 the C preprocessor on the standard input and produce to standard
309 output. This variable will have the value "-" if cppstdin needs
310 a minus to specify standard input, otherwise the value is "".
311
312cpprun (cppstdin.U):
313 This variable contains the command which will invoke a C preprocessor
314 on standard input and put the output to stdout. It is guaranteed not
315 to be a wrapper and may be a null string if no preprocessor can be
316 made directly available. This preprocessor might be different from the
317 one used by the C compiler. Don't forget to append cpplast after the
318 preprocessor options.
319
320cppstdin (cppstdin.U):
321 This variable contains the command which will invoke the C
322 preprocessor on standard input and put the output to stdout.
323 It is primarily used by other Configure units that ask about
324 preprocessor symbols.
325
326cppsymbols (Cppsym.U):
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327 The variable contains the symbols defined by the C preprocessor
328 alone. The symbols defined by cc or by cc when it calls cpp are
329 not in this list, see ccsymbols and cppccsymbols.
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330 The list is a space-separated list of symbol=value tokens.
331
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332cryptlib (d_crypt.U):
333 This variable holds -lcrypt or the path to a libcrypt.a archive if
334 the crypt() function is not defined in the standard C library. It is
335 up to the Makefile to use this.
336
337csh (Loc.U):
5bf26616 338 This variable is used internally by Configure to determine the
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339 full pathname (if any) of the csh program. After Configure runs,
340 the value is reset to a plain "csh" and is not useful.
341
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342d__fwalk (d__fwalk.U):
343 This variable conditionally defines HAS__FWALK if _fwalk() is
344 available to apply a function to all the file handles.
345
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346d_access (d_access.U):
347 This variable conditionally defines HAS_ACCESS if the access() system
348 call is available to check for access permissions using real IDs.
349
350d_accessx (d_accessx.U):
351 This variable conditionally defines the HAS_ACCESSX symbol, which
352 indicates to the C program that the accessx() routine is available.
353
354d_alarm (d_alarm.U):
355 This variable conditionally defines the HAS_ALARM symbol, which
356 indicates to the C program that the alarm() routine is available.
357
358d_archlib (archlib.U):
359 This variable conditionally defines ARCHLIB to hold the pathname
360 of architecture-dependent library files for $package. If
361 $archlib is the same as $privlib, then this is set to undef.
362
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363d_atolf (atolf.U):
364 This variable conditionally defines the HAS_ATOLF symbol, which
365 indicates to the C program that the atolf() routine is available.
366
367d_atoll (atoll.U):
368 This variable conditionally defines the HAS_ATOLL symbol, which
369 indicates to the C program that the atoll() routine is available.
370
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371d_attribut (d_attribut.U):
372 This variable conditionally defines HASATTRIBUTE, which
373 indicates the C compiler can check for function attributes,
374 such as printf formats.
375
376d_bcmp (d_bcmp.U):
377 This variable conditionally defines the HAS_BCMP symbol if
378 the bcmp() routine is available to compare strings.
379
380d_bcopy (d_bcopy.U):
381 This variable conditionally defines the HAS_BCOPY symbol if
382 the bcopy() routine is available to copy strings.
383
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384d_bincompat5005 (bincompat5005.U):
385 This variable conditionally defines BINCOMPAT5005 so that embed.h
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386 can take special action if this version of Perl should be
387 binary-compatible with Perl 5.005. This is impossible for builds
388 that use features like threads and multiplicity it is always $undef
389 for those versions.
d71b2b6b 390
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391d_bsd (Guess.U):
392 This symbol conditionally defines the symbol BSD when running on a
393 BSD system.
394
395d_bsdgetpgrp (d_getpgrp.U):
396 This variable conditionally defines USE_BSD_GETPGRP if
397 getpgrp needs one arguments whereas USG one needs none.
398
399d_bsdsetpgrp (d_setpgrp.U):
400 This variable conditionally defines USE_BSD_SETPGRP if
401 setpgrp needs two arguments whereas USG one needs none.
402 See also d_setpgid for a POSIX interface.
403
404d_bzero (d_bzero.U):
405 This variable conditionally defines the HAS_BZERO symbol if
406 the bzero() routine is available to set memory to 0.
407
408d_casti32 (d_casti32.U):
409 This variable conditionally defines CASTI32, which indicates
410 whether the C compiler can cast large floats to 32-bit ints.
411
412d_castneg (d_castneg.U):
413 This variable conditionally defines CASTNEG, which indicates
414 wether the C compiler can cast negative float to unsigned.
415
416d_charvspr (d_vprintf.U):
417 This variable conditionally defines CHARVSPRINTF if this system
418 has vsprintf returning type (char*). The trend seems to be to
419 declare it as "int vsprintf()".
420
421d_chown (d_chown.U):
422 This variable conditionally defines the HAS_CHOWN symbol, which
423 indicates to the C program that the chown() routine is available.
424
425d_chroot (d_chroot.U):
426 This variable conditionally defines the HAS_CHROOT symbol, which
427 indicates to the C program that the chroot() routine is available.
428
429d_chsize (d_chsize.U):
430 This variable conditionally defines the CHSIZE symbol, which
431 indicates to the C program that the chsize() routine is available
432 to truncate files. You might need a -lx to get this routine.
433
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434d_class (d_class.U):
435 This variable conditionally defines the HAS_CLASS symbol, which
436 indicates to the C program that the class() routine is available.
437
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438d_closedir (d_closedir.U):
439 This variable conditionally defines HAS_CLOSEDIR if closedir() is
440 available.
441
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442d_cmsghdr_s (d_cmsghdr_s.U):
443 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
444 which indicates that the struct cmsghdr is supported.
445
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446d_const (d_const.U):
447 This variable conditionally defines the HASCONST symbol, which
448 indicates to the C program that this C compiler knows about the
449 const type.
450
451d_crypt (d_crypt.U):
452 This variable conditionally defines the CRYPT symbol, which
453 indicates to the C program that the crypt() routine is available
454 to encrypt passwords and the like.
455
456d_csh (d_csh.U):
457 This variable conditionally defines the CSH symbol, which
458 indicates to the C program that the C-shell exists.
459
460d_cuserid (d_cuserid.U):
461 This variable conditionally defines the HAS_CUSERID symbol, which
462 indicates to the C program that the cuserid() routine is available
463 to get character login names.
464
465d_dbl_dig (d_dbl_dig.U):
466 This variable conditionally defines d_dbl_dig if this system's
467 header files provide DBL_DIG, which is the number of significant
468 digits in a double precision number.
469
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470d_dbminitproto (d_dbminitproto.U):
471 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
472 which indicates to the C program that the system provides
473 a prototype for the dbminit() function. Otherwise, it is
474 up to the program to supply one.
475
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476d_difftime (d_difftime.U):
477 This variable conditionally defines the HAS_DIFFTIME symbol, which
478 indicates to the C program that the difftime() routine is available.
479
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480d_dirfd (d_dirfd.U):
481 This variable conditionally defines the HAS_DIRFD constant,
482 which indicates to the C program that dirfd() is available
483 to return the file descriptor of a directory stream.
484
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485d_dirnamlen (i_dirent.U):
486 This variable conditionally defines DIRNAMLEN, which indicates
487 to the C program that the length of directory entry names is
488 provided by a d_namelen field.
489
490d_dlerror (d_dlerror.U):
491 This variable conditionally defines the HAS_DLERROR symbol, which
492 indicates to the C program that the dlerror() routine is available.
493
494d_dlopen (d_dlopen.U):
495 This variable conditionally defines the HAS_DLOPEN symbol, which
496 indicates to the C program that the dlopen() routine is available.
497
498d_dlsymun (d_dlsymun.U):
499 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
500 indicates that we need to prepend an underscore to the symbol
501 name before calling dlsym().
502
503d_dosuid (d_dosuid.U):
504 This variable conditionally defines the symbol DOSUID, which
505 tells the C program that it should insert setuid emulation code
506 on hosts which have setuid #! scripts disabled.
507
508d_drand48proto (d_drand48proto.U):
509 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
510 which indicates to the C program that the system provides
511 a prototype for the drand48() function. Otherwise, it is
512 up to the program to supply one.
513
514d_dup2 (d_dup2.U):
515 This variable conditionally defines HAS_DUP2 if dup2() is
516 available to duplicate file descriptors.
517
518d_eaccess (d_eaccess.U):
519 This variable conditionally defines the HAS_EACCESS symbol, which
520 indicates to the C program that the eaccess() routine is available.
521
522d_endgrent (d_endgrent.U):
523 This variable conditionally defines the HAS_ENDGRENT symbol, which
524 indicates to the C program that the endgrent() routine is available
525 for sequential access of the group database.
526
527d_endhent (d_endhent.U):
528 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
529 available to close whatever was being used for host queries.
530
531d_endnent (d_endnent.U):
532 This variable conditionally defines HAS_ENDNETENT if endnetent() is
533 available to close whatever was being used for network queries.
534
535d_endpent (d_endpent.U):
536 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
537 available to close whatever was being used for protocol queries.
538
539d_endpwent (d_endpwent.U):
540 This variable conditionally defines the HAS_ENDPWENT symbol, which
541 indicates to the C program that the endpwent() routine is available
542 for sequential access of the passwd database.
543
544d_endsent (d_endsent.U):
545 This variable conditionally defines HAS_ENDSERVENT if endservent() is
546 available to close whatever was being used for service queries.
547
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548d_eofnblk (nblock_io.U):
549 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
550 when reading from a non-blocking I/O source.
551
552d_eunice (Guess.U):
553 This variable conditionally defines the symbols EUNICE and VAX, which
554 alerts the C program that it must deal with ideosyncracies of VMS.
555
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556d_fchdir (d_fchdir.U):
557 This variable conditionally defines the HAS_FCHDIR symbol, which
558 indicates to the C program that the fchdir() routine is available.
559
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560d_fchmod (d_fchmod.U):
561 This variable conditionally defines the HAS_FCHMOD symbol, which
562 indicates to the C program that the fchmod() routine is available
563 to change mode of opened files.
564
565d_fchown (d_fchown.U):
566 This variable conditionally defines the HAS_FCHOWN symbol, which
567 indicates to the C program that the fchown() routine is available
568 to change ownership of opened files.
569
570d_fcntl (d_fcntl.U):
571 This variable conditionally defines the HAS_FCNTL symbol, and indicates
572 whether the fcntl() function exists
573
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574d_fcntl_can_lock (d_fcntl_can_lock.U):
575 This variable conditionally defines the FCNTL_CAN_LOCK symbol
576 and indicates whether file locking with fcntl() works.
577
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578d_fd_macros (d_fd_set.U):
579 This variable contains the eventual value of the HAS_FD_MACROS symbol,
580 which indicates if your C compiler knows about the macros which
581 manipulate an fd_set.
582
583d_fd_set (d_fd_set.U):
584 This variable contains the eventual value of the HAS_FD_SET symbol,
585 which indicates if your C compiler knows about the fd_set typedef.
586
587d_fds_bits (d_fd_set.U):
588 This variable contains the eventual value of the HAS_FDS_BITS symbol,
589 which indicates if your fd_set typedef contains the fds_bits member.
590 If you have an fd_set typedef, but the dweebs who installed it did
591 a half-fast job and neglected to provide the macros to manipulate
592 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
593
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594d_fgetpos (d_fgetpos.U):
595 This variable conditionally defines HAS_FGETPOS if fgetpos() is
596 available to get the file position indicator.
597
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598d_finite (d_finite.U):
599 This variable conditionally defines the HAS_FINITE symbol, which
600 indicates to the C program that the finite() routine is available.
601
602d_finitel (d_finitel.U):
603 This variable conditionally defines the HAS_FINITEL symbol, which
604 indicates to the C program that the finitel() routine is available.
605
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606d_flexfnam (d_flexfnam.U):
607 This variable conditionally defines the FLEXFILENAMES symbol, which
608 indicates that the system supports filenames longer than 14 characters.
609
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610d_flock (d_flock.U):
611 This variable conditionally defines HAS_FLOCK if flock() is
612 available to do file locking.
613
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614d_flockproto (d_flockproto.U):
615 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
616 which indicates to the C program that the system provides
617 a prototype for the flock() function. Otherwise, it is
618 up to the program to supply one.
619
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620d_fork (d_fork.U):
621 This variable conditionally defines the HAS_FORK symbol, which
622 indicates to the C program that the fork() routine is available.
623
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624d_fp_class (d_fp_class.U):
625 This variable conditionally defines the HAS_FP_CLASS symbol, which
626 indicates to the C program that the fp_class() routine is available.
627
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628d_fpathconf (d_pathconf.U):
629 This variable conditionally defines the HAS_FPATHCONF symbol, which
630 indicates to the C program that the pathconf() routine is available
631 to determine file-system related limits and options associated
632 with a given open file descriptor.
633
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634d_fpclass (d_fpclass.U):
635 This variable conditionally defines the HAS_FPCLASS symbol, which
636 indicates to the C program that the fpclass() routine is available.
637
638d_fpclassify (d_fpclassify.U):
639 This variable conditionally defines the HAS_FPCLASSIFY symbol, which
640 indicates to the C program that the fpclassify() routine is available.
641
642d_fpclassl (d_fpclassl.U):
643 This variable conditionally defines the HAS_FPCLASSL symbol, which
644 indicates to the C program that the fpclassl() routine is available.
645
c890dc6c 646d_fpos64_t (d_fpos64_t.U):
ca24dfc6 647 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 648
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649d_frexpl (d_frexpl.U):
650 This variable conditionally defines the HAS_FREXPL symbol, which
651 indicates to the C program that the frexpl() routine is available.
652
ad27e871 653d_fs_data_s (d_fs_data_s.U):
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654 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
655 which indicates that the struct fs_data is supported.
656
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657d_fseeko (d_fseeko.U):
658 This variable conditionally defines the HAS_FSEEKO symbol, which
659 indicates to the C program that the fseeko() routine is available.
660
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661d_fsetpos (d_fsetpos.U):
662 This variable conditionally defines HAS_FSETPOS if fsetpos() is
663 available to set the file position indicator.
664
0545a864 665d_fstatfs (d_fstatfs.U):
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666 This variable conditionally defines the HAS_FSTATFS symbol, which
667 indicates to the C program that the fstatfs() routine is available.
668
669d_fstatvfs (d_statvfs.U):
670 This variable conditionally defines the HAS_FSTATVFS symbol, which
671 indicates to the C program that the fstatvfs() routine is available.
672
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673d_fsync (d_fsync.U):
674 This variable conditionally defines the HAS_FSYNC symbol, which
675 indicates to the C program that the fsync() routine is available.
676
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677d_ftello (d_ftello.U):
678 This variable conditionally defines the HAS_FTELLO symbol, which
679 indicates to the C program that the ftello() routine is available.
680
681d_ftime (d_ftime.U):
682 This variable conditionally defines the HAS_FTIME symbol, which indicates
683 that the ftime() routine exists. The ftime() routine is basically
684 a sub-second accuracy clock.
685
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686d_Gconvert (d_gconvert.U):
687 This variable holds what Gconvert is defined as to convert
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688 floating point numbers into strings. By default, Configure
689 sets this macro to use the first of gconvert, gcvt, or sprintf
690 that pass sprintf-%g-like behaviour tests. If perl is using
691 long doubles, the macro uses the first of the following
692 functions that pass Configure's tests: qgcvt, sprintf (if
693 Configure knows how to make sprintf format long doubles--see
694 sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).
695 The gconvert_preference and gconvert_ld_preference variables
696 can be used to alter Configure's preferences, for doubles and
697 long doubles, respectively. If present, they contain a
698 space-separated list of one or more of the above function
699 names in the order they should be tried.
700 d_Gconvert may be set to override Configure with a platform-
701 specific function. If this function expects a double, a
702 different value may need to be set by the uselongdouble.cbu
703 call-back unit so that long doubles can be formatted without
704 loss of precision.
ff935051 705
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706d_getcwd (d_getcwd.U):
707 This variable conditionally defines the HAS_GETCWD symbol, which
708 indicates to the C program that the getcwd() routine is available
709 to get the current working directory.
710
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711d_getespwnam (d_getespwnam.U):
712 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
713 available to retrieve enchanced (shadow) password entries by name.
714
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715d_getfsstat (d_getfsstat.U):
716 This variable conditionally defines the HAS_GETFSSTAT symbol, which
717 indicates to the C program that the getfsstat() routine is available.
718
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719d_getgrent (d_getgrent.U):
720 This variable conditionally defines the HAS_GETGRENT symbol, which
721 indicates to the C program that the getgrent() routine is available
722 for sequential access of the group database.
723
724d_getgrps (d_getgrps.U):
725 This variable conditionally defines the HAS_GETGROUPS symbol, which
726 indicates to the C program that the getgroups() routine is available
727 to get the list of process groups.
728
729d_gethbyaddr (d_gethbyad.U):
730 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
731 indicates to the C program that the gethostbyaddr() routine is available
732 to look up hosts by their IP addresses.
733
734d_gethbyname (d_gethbynm.U):
735 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
736 indicates to the C program that the gethostbyname() routine is available
737 to look up host names in some data base or other.
738
739d_gethent (d_gethent.U):
740 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
741 available to look up host names in some data base or another.
742
743d_gethname (d_gethname.U):
744 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
745 indicates to the C program that the gethostname() routine may be
746 used to derive the host name.
747
748d_gethostprotos (d_gethostprotos.U):
749 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
750 which indicates to the C program that <netdb.h> supplies
751 prototypes for the various gethost*() functions.
752 See also netdbtype.U for probing for various netdb types.
753
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754d_getitimer (d_getitimer.U):
755 This variable conditionally defines the HAS_GETITIMER symbol, which
756 indicates to the C program that the getitimer() routine is available.
757
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758d_getlogin (d_getlogin.U):
759 This variable conditionally defines the HAS_GETLOGIN symbol, which
760 indicates to the C program that the getlogin() routine is available
761 to get the login name.
762
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763d_getmnt (d_getmnt.U):
764 This variable conditionally defines the HAS_GETMNT symbol, which
765 indicates to the C program that the getmnt() routine is available
766 to retrieve one or more mount info blocks by filename.
767
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768d_getmntent (d_getmntent.U):
769 This variable conditionally defines the HAS_GETMNTENT symbol, which
770 indicates to the C program that the getmntent() routine is available
0617aed7 771 to iterate through mounted files to get their mount info.
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772
773d_getnbyaddr (d_getnbyad.U):
774 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
775 indicates to the C program that the getnetbyaddr() routine is available
776 to look up networks by their IP addresses.
777
778d_getnbyname (d_getnbynm.U):
779 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
780 indicates to the C program that the getnetbyname() routine is available
781 to look up networks by their names.
782
783d_getnent (d_getnent.U):
784 This variable conditionally defines HAS_GETNETENT if getnetent() is
785 available to look up network names in some data base or another.
786
787d_getnetprotos (d_getnetprotos.U):
788 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
789 which indicates to the C program that <netdb.h> supplies
790 prototypes for the various getnet*() functions.
791 See also netdbtype.U for probing for various netdb types.
792
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793d_getpagsz (d_getpagsz.U):
794 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
795 is available to get the system page size.
796
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797d_getpbyname (d_getprotby.U):
798 This variable conditionally defines the HAS_GETPROTOBYNAME
799 symbol, which indicates to the C program that the
800 getprotobyname() routine is available to look up protocols
801 by their name.
802
803d_getpbynumber (d_getprotby.U):
804 This variable conditionally defines the HAS_GETPROTOBYNUMBER
805 symbol, which indicates to the C program that the
806 getprotobynumber() routine is available to look up protocols
807 by their number.
808
809d_getpent (d_getpent.U):
810 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
811 available to look up protocols in some data base or another.
812
813d_getpgid (d_getpgid.U):
814 This variable conditionally defines the HAS_GETPGID symbol, which
815 indicates to the C program that the getpgid(pid) function
816 is available to get the process group id.
817
818d_getpgrp2 (d_getpgrp2.U):
819 This variable conditionally defines the HAS_GETPGRP2 symbol, which
820 indicates to the C program that the getpgrp2() (as in DG/UX) routine
821 is available to get the current process group.
822
823d_getpgrp (d_getpgrp.U):
824 This variable conditionally defines HAS_GETPGRP if getpgrp() is
825 available to get the current process group.
826
827d_getppid (d_getppid.U):
828 This variable conditionally defines the HAS_GETPPID symbol, which
829 indicates to the C program that the getppid() routine is available
830 to get the parent process ID.
831
832d_getprior (d_getprior.U):
833 This variable conditionally defines HAS_GETPRIORITY if getpriority()
834 is available to get a process's priority.
835
836d_getprotoprotos (d_getprotoprotos.U):
837 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
838 which indicates to the C program that <netdb.h> supplies
839 prototypes for the various getproto*() functions.
840 See also netdbtype.U for probing for various netdb types.
841
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842d_getprpwnam (d_getprpwnam.U):
843 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
844 available to retrieve protected (shadow) password entries by name.
845
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846d_getpwent (d_getpwent.U):
847 This variable conditionally defines the HAS_GETPWENT symbol, which
848 indicates to the C program that the getpwent() routine is available
849 for sequential access of the passwd database.
850
851d_getsbyname (d_getsrvby.U):
852 This variable conditionally defines the HAS_GETSERVBYNAME
853 symbol, which indicates to the C program that the
854 getservbyname() routine is available to look up services
855 by their name.
856
857d_getsbyport (d_getsrvby.U):
858 This variable conditionally defines the HAS_GETSERVBYPORT
859 symbol, which indicates to the C program that the
860 getservbyport() routine is available to look up services
861 by their port.
862
863d_getsent (d_getsent.U):
864 This variable conditionally defines HAS_GETSERVENT if getservent() is
865 available to look up network services in some data base or another.
866
867d_getservprotos (d_getservprotos.U):
868 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
869 which indicates to the C program that <netdb.h> supplies
870 prototypes for the various getserv*() functions.
871 See also netdbtype.U for probing for various netdb types.
872
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873d_getspnam (d_getspnam.U):
874 This variable conditionally defines HAS_GETSPNAM if getspnam() is
875 available to retrieve SysV shadow password entries by name.
876
877d_gettimeod (d_ftime.U):
878 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
879 indicates that the gettimeofday() system call exists (to obtain a
880 sub-second accuracy clock). You should probably include <sys/resource.h>.
881
882d_gnulibc (d_gnulibc.U):
883 Defined if we're dealing with the GNU C Library.
884
885d_grpasswd (i_grp.U):
886 This variable conditionally defines GRPASSWD, which indicates
887 that struct group in <grp.h> contains gr_passwd.
888
889d_hasmntopt (d_hasmntopt.U):
890 This variable conditionally defines the HAS_HASMNTOPT symbol, which
891 indicates to the C program that the hasmntopt() routine is available
892 to query the mount options of file systems.
893
894d_htonl (d_htonl.U):
895 This variable conditionally defines HAS_HTONL if htonl() and its
896 friends are available to do network order byte swapping.
897
898d_index (d_strchr.U):
899 This variable conditionally defines HAS_INDEX if index() and
900 rindex() are available for string searching.
901
902d_inetaton (d_inetaton.U):
903 This variable conditionally defines the HAS_INET_ATON symbol, which
904 indicates to the C program that the inet_aton() function is available
905 to parse IP address "dotted-quad" strings.
906
13b3f787 907d_int64_t (d_int64_t.U):
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908 This symbol will be defined if the C compiler supports int64_t.
909
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910d_isascii (d_isascii.U):
911 This variable conditionally defines the HAS_ISASCII constant,
912 which indicates to the C program that isascii() is available.
913
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914d_isfinite (d_isfinite.U):
915 This variable conditionally defines the HAS_ISFINITE symbol, which
916 indicates to the C program that the isfinite() routine is available.
917
918d_isinf (d_isinf.U):
919 This variable conditionally defines the HAS_ISINF symbol, which
920 indicates to the C program that the isinf() routine is available.
921
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922d_isnan (d_isnan.U):
923 This variable conditionally defines the HAS_ISNAN symbol, which
924 indicates to the C program that the isnan() routine is available.
925
926d_isnanl (d_isnanl.U):
927 This variable conditionally defines the HAS_ISNANL symbol, which
928 indicates to the C program that the isnanl() routine is available.
929
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930d_killpg (d_killpg.U):
931 This variable conditionally defines the HAS_KILLPG symbol, which
932 indicates to the C program that the killpg() routine is available
933 to kill process groups.
934
935d_lchown (d_lchown.U):
936 This variable conditionally defines the HAS_LCHOWN symbol, which
937 indicates to the C program that the lchown() routine is available
938 to operate on a symbolic link (instead of following the link).
939
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940d_ldbl_dig (d_ldbl_dig.U):
941 This variable conditionally defines d_ldbl_dig if this system's
942 header files provide LDBL_DIG, which is the number of significant
943 digits in a long double precision number.
944
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945d_link (d_link.U):
946 This variable conditionally defines HAS_LINK if link() is
947 available to create hard links.
948
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949d_locconv (d_locconv.U):
950 This variable conditionally defines HAS_LOCALECONV if localeconv() is
951 available for numeric and monetary formatting conventions.
952
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953d_lockf (d_lockf.U):
954 This variable conditionally defines HAS_LOCKF if lockf() is
955 available to do file locking.
956
957d_longdbl (d_longdbl.U):
958 This variable conditionally defines HAS_LONG_DOUBLE if
959 the long double type is supported.
960
961d_longlong (d_longlong.U):
962 This variable conditionally defines HAS_LONG_LONG if
963 the long long type is supported.
964
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965d_lseekproto (d_lseekproto.U):
966 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
967 which indicates to the C program that the system provides
968 a prototype for the lseek() function. Otherwise, it is
969 up to the program to supply one.
970
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971d_lstat (d_lstat.U):
972 This variable conditionally defines HAS_LSTAT if lstat() is
973 available to do file stats on symbolic links.
974
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975d_madvise (d_madvise.U):
976 This variable conditionally defines HAS_MADVISE if madvise() is
977 available to map a file into memory.
978
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979d_mblen (d_mblen.U):
980 This variable conditionally defines the HAS_MBLEN symbol, which
981 indicates to the C program that the mblen() routine is available
982 to find the number of bytes in a multibye character.
983
984d_mbstowcs (d_mbstowcs.U):
985 This variable conditionally defines the HAS_MBSTOWCS symbol, which
986 indicates to the C program that the mbstowcs() routine is available
987 to convert a multibyte string into a wide character string.
988
989d_mbtowc (d_mbtowc.U):
990 This variable conditionally defines the HAS_MBTOWC symbol, which
991 indicates to the C program that the mbtowc() routine is available
992 to convert multibyte to a wide character.
993
994d_memchr (d_memchr.U):
995 This variable conditionally defines the HAS_MEMCHR symbol, which
996 indicates to the C program that the memchr() routine is available
997 to locate characters within a C string.
998
999d_memcmp (d_memcmp.U):
1000 This variable conditionally defines the HAS_MEMCMP symbol, which
1001 indicates to the C program that the memcmp() routine is available
1002 to compare blocks of memory.
1003
1004d_memcpy (d_memcpy.U):
1005 This variable conditionally defines the HAS_MEMCPY symbol, which
1006 indicates to the C program that the memcpy() routine is available
1007 to copy blocks of memory.
1008
1009d_memmove (d_memmove.U):
1010 This variable conditionally defines the HAS_MEMMOVE symbol, which
1011 indicates to the C program that the memmove() routine is available
1012 to copy potentatially overlapping blocks of memory.
1013
1014d_memset (d_memset.U):
1015 This variable conditionally defines the HAS_MEMSET symbol, which
1016 indicates to the C program that the memset() routine is available
1017 to set blocks of memory.
1018
1019d_mkdir (d_mkdir.U):
1020 This variable conditionally defines the HAS_MKDIR symbol, which
1021 indicates to the C program that the mkdir() routine is available
209e5c0a 1022 to create directories..
781b178c 1023
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1024d_mkdtemp (d_mkdtemp.U):
1025 This variable conditionally defines the HAS_MKDTEMP symbol, which
1026 indicates to the C program that the mkdtemp() routine is available
1027 to exclusively create a uniquely named temporary directory.
1028
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1029d_mkfifo (d_mkfifo.U):
1030 This variable conditionally defines the HAS_MKFIFO symbol, which
1031 indicates to the C program that the mkfifo() routine is available.
1032
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1033d_mkstemp (d_mkstemp.U):
1034 This variable conditionally defines the HAS_MKSTEMP symbol, which
1035 indicates to the C program that the mkstemp() routine is available
1036 to exclusively create and open a uniquely named temporary file.
1037
1038d_mkstemps (d_mkstemps.U):
1039 This variable conditionally defines the HAS_MKSTEMPS symbol, which
1040 indicates to the C program that the mkstemps() routine is available
1041 to exclusively create and open a uniquely named (with a suffix)
1042 temporary file.
1043
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1044d_mktime (d_mktime.U):
1045 This variable conditionally defines the HAS_MKTIME symbol, which
1046 indicates to the C program that the mktime() routine is available.
1047
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1048d_mmap (d_mmap.U):
1049 This variable conditionally defines HAS_MMAP if mmap() is
1050 available to map a file into memory.
1051
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1052d_modfl (d_modfl.U):
1053 This variable conditionally defines the HAS_MODFL symbol, which
1054 indicates to the C program that the modfl() routine is available.
1055
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1056d_modfl_pow32_bug (d_modfl.U):
1057 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1058 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1059 For example from 4294967303.150000 one would get 4294967302.000000
1060 and 1.150000. The bug has been seen in certain versions of glibc,
1061 release 2.2.2 is known to be okay.
1062
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1063d_mprotect (d_mprotect.U):
1064 This variable conditionally defines HAS_MPROTECT if mprotect() is
1065 available to modify the access protection of a memory mapped file.
1066
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1067d_msg (d_msg.U):
1068 This variable conditionally defines the HAS_MSG symbol, which
1069 indicates that the entire msg*(2) library is present.
1070
1071d_msg_ctrunc (d_socket.U):
1072 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1073 which indicates that the MSG_CTRUNC is available. #ifdef is
1074 not enough because it may be an enum, glibc has been known to do this.
1075
1076d_msg_dontroute (d_socket.U):
1077 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1078 which indicates that the MSG_DONTROUTE is available. #ifdef is
1079 not enough because it may be an enum, glibc has been known to do this.
1080
1081d_msg_oob (d_socket.U):
1082 This variable conditionally defines the HAS_MSG_OOB symbol,
1083 which indicates that the MSG_OOB is available. #ifdef is
1084 not enough because it may be an enum, glibc has been known to do this.
1085
1086d_msg_peek (d_socket.U):
1087 This variable conditionally defines the HAS_MSG_PEEK symbol,
1088 which indicates that the MSG_PEEK is available. #ifdef is
1089 not enough because it may be an enum, glibc has been known to do this.
1090
1091d_msg_proxy (d_socket.U):
1092 This variable conditionally defines the HAS_MSG_PROXY symbol,
1093 which indicates that the MSG_PROXY is available. #ifdef is
1094 not enough because it may be an enum, glibc has been known to do this.
1095
1096d_msgctl (d_msgctl.U):
1097 This variable conditionally defines the HAS_MSGCTL symbol, which
1098 indicates to the C program that the msgctl() routine is available.
1099
1100d_msgget (d_msgget.U):
1101 This variable conditionally defines the HAS_MSGGET symbol, which
1102 indicates to the C program that the msgget() routine is available.
1103
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1104d_msghdr_s (d_msghdr_s.U):
1105 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1106 which indicates that the struct msghdr is supported.
1107
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1108d_msgrcv (d_msgrcv.U):
1109 This variable conditionally defines the HAS_MSGRCV symbol, which
1110 indicates to the C program that the msgrcv() routine is available.
1111
1112d_msgsnd (d_msgsnd.U):
1113 This variable conditionally defines the HAS_MSGSND symbol, which
1114 indicates to the C program that the msgsnd() routine is available.
1115
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1116d_msync (d_msync.U):
1117 This variable conditionally defines HAS_MSYNC if msync() is
1118 available to synchronize a mapped file.
1119
1120d_munmap (d_munmap.U):
1121 This variable conditionally defines HAS_MUNMAP if munmap() is
1122 available to unmap a region mapped by mmap().
1123
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1124d_mymalloc (mallocsrc.U):
1125 This variable conditionally defines MYMALLOC in case other parts
1126 of the source want to take special action if MYMALLOC is used.
1127 This may include different sorts of profiling or error detection.
1128
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1129d_nice (d_nice.U):
1130 This variable conditionally defines the HAS_NICE symbol, which
1131 indicates to the C program that the nice() routine is available.
1132
2765b840
JH
1133d_nl_langinfo (d_nl_langinfo.U):
1134 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1135 indicates to the C program that the nl_langinfo() routine is available.
1136
78691af5 1137d_nv_preserves_uv (perlxv.U):
cce08f5b
JH
1138 This variable indicates whether a variable of type nvtype
1139 can preserve all the bits a variable of type uvtype.
1140
d6c14000
JH
1141d_nv_preserves_uv_bits (perlxv.U):
1142 This variable indicates how many of bits type uvtype
1143 a variable nvtype can preserve.
1144
c890dc6c 1145d_off64_t (d_off64_t.U):
781b178c
JH
1146 This symbol will be defined if the C compiler supports off64_t.
1147
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1148d_old_pthread_create_joinable (d_pthrattrj.U):
1149 This variable conditionally defines pthread_create_joinable.
1150 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1151
1152d_oldpthreads (usethreads.U):
1153 This variable conditionally defines the OLD_PTHREADS_API symbol,
1154 and indicates that Perl should be built to use the old
8c09e4ca 1155 draft POSIX threads API. This is only potentially meaningful if
781b178c
JH
1156 usethreads is set.
1157
1158d_oldsock (d_socket.U):
1159 This variable conditionally defines the OLDSOCKET symbol, which
1160 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1161
1162d_open3 (d_open3.U):
1163 This variable conditionally defines the HAS_OPEN3 manifest constant,
1164 which indicates to the C program that the 3 argument version of
1165 the open(2) function is available.
1166
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1167d_pathconf (d_pathconf.U):
1168 This variable conditionally defines the HAS_PATHCONF symbol, which
1169 indicates to the C program that the pathconf() routine is available
1170 to determine file-system related limits and options associated
1171 with a given filename.
1172
1173d_pause (d_pause.U):
1174 This variable conditionally defines the HAS_PAUSE symbol, which
1175 indicates to the C program that the pause() routine is available
1176 to suspend a process until a signal is received.
1177
3b777bb4
GS
1178d_perl_otherlibdirs (otherlibdirs.U):
1179 This variable conditionally defines PERL_OTHERLIBDIRS, which
1180 contains a colon-separated set of paths for the perl binary to
1181 include in @INC. See also otherlibdirs.
1182
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JH
1183d_phostname (d_gethname.U):
1184 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1185 contains the shell command which, when fed to popen(), may be
1186 used to derive the host name.
1187
1188d_pipe (d_pipe.U):
1189 This variable conditionally defines the HAS_PIPE symbol, which
1190 indicates to the C program that the pipe() routine is available
1191 to create an inter-process channel.
1192
1193d_poll (d_poll.U):
1194 This variable conditionally defines the HAS_POLL symbol, which
1195 indicates to the C program that the poll() routine is available
1196 to poll active file descriptors.
1197
1198d_portable (d_portable.U):
1199 This variable conditionally defines the PORTABLE symbol, which
1200 indicates to the C program that it should not assume that it is
1201 running on the machine it was compiled on.
1202
ff935051
JH
1203d_PRId64 (quadfio.U):
1204 This variable conditionally defines the PERL_PRId64 symbol, which
1205 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1206
1207d_PRIeldbl (longdblfio.U):
6b356c8e 1208 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1209 indiciates that stdio has a symbol to print long doubles.
1210
6b356c8e
JH
1211d_PRIEUldbl (longdblfio.U):
1212 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1213 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1214 The 'U' in the name is to separate this from d_PRIeldbl so that even
1215 case-blind systems can see the difference.
ff935051
JH
1216
1217d_PRIfldbl (longdblfio.U):
6b356c8e 1218 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1219 indiciates that stdio has a symbol to print long doubles.
1220
6b356c8e
JH
1221d_PRIFUldbl (longdblfio.U):
1222 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1223 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1224 The 'U' in the name is to separate this from d_PRIfldbl so that even
1225 case-blind systems can see the difference.
ff935051
JH
1226
1227d_PRIgldbl (longdblfio.U):
6b356c8e 1228 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1229 indiciates that stdio has a symbol to print long doubles.
1230
6b356c8e
JH
1231d_PRIGUldbl (longdblfio.U):
1232 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1233 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1234 The 'U' in the name is to separate this from d_PRIgldbl so that even
1235 case-blind systems can see the difference.
ff935051
JH
1236
1237d_PRIi64 (quadfio.U):
1238 This variable conditionally defines the PERL_PRIi64 symbol, which
1239 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1240
1241d_PRIo64 (quadfio.U):
1242 This variable conditionally defines the PERL_PRIo64 symbol, which
1243 indiciates that stdio has a symbol to print 64-bit octal numbers.
1244
1245d_PRIu64 (quadfio.U):
1246 This variable conditionally defines the PERL_PRIu64 symbol, which
1247 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1248 numbers.
1249
1250d_PRIx64 (quadfio.U):
1251 This variable conditionally defines the PERL_PRIx64 symbol, which
1252 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1253
6b356c8e
JH
1254d_PRIXU64 (quadfio.U):
1255 This variable conditionally defines the PERL_PRIXU64 symbol, which
ff935051 1256 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
6b356c8e
JH
1257 The 'U' in the name is to separate this from d_PRIx64 so that even
1258 case-blind systems can see the difference.
ff935051 1259
428dc699
JH
1260d_procselfexe (d_procselfexe.U):
1261 Defined if $procselfexe is symlink to the absolute
1262 pathname of the executing program.
1263
d6483fcc
JH
1264d_pthread_atfork (d_pthread_atfork.U):
1265 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1266 which indicates to the C program that the pthread_atfork()
1267 routine is available.
1268
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1269d_pthread_yield (d_pthread_y.U):
1270 This variable conditionally defines the HAS_PTHREAD_YIELD
1271 symbol if the pthread_yield routine is available to yield
1272 the execution of the current thread.
1273
1274d_pwage (i_pwd.U):
1275 This variable conditionally defines PWAGE, which indicates
1276 that struct passwd contains pw_age.
1277
1278d_pwchange (i_pwd.U):
1279 This variable conditionally defines PWCHANGE, which indicates
1280 that struct passwd contains pw_change.
1281
1282d_pwclass (i_pwd.U):
1283 This variable conditionally defines PWCLASS, which indicates
1284 that struct passwd contains pw_class.
1285
1286d_pwcomment (i_pwd.U):
1287 This variable conditionally defines PWCOMMENT, which indicates
1288 that struct passwd contains pw_comment.
1289
1290d_pwexpire (i_pwd.U):
1291 This variable conditionally defines PWEXPIRE, which indicates
1292 that struct passwd contains pw_expire.
1293
1294d_pwgecos (i_pwd.U):
1295 This variable conditionally defines PWGECOS, which indicates
1296 that struct passwd contains pw_gecos.
1297
1298d_pwpasswd (i_pwd.U):
1299 This variable conditionally defines PWPASSWD, which indicates
1300 that struct passwd contains pw_passwd.
1301
1302d_pwquota (i_pwd.U):
1303 This variable conditionally defines PWQUOTA, which indicates
1304 that struct passwd contains pw_quota.
1305
792d8dab
JH
1306d_qgcvt (d_qgcvt.U):
1307 This variable conditionally defines the HAS_QGCVT symbol, which
1308 indicates to the C program that the qgcvt() routine is available.
1309
de1c2614
JH
1310d_quad (quadtype.U):
1311 This variable, if defined, tells that there's a 64-bit integer type,
1312 quadtype.
1313
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1314d_readdir (d_readdir.U):
1315 This variable conditionally defines HAS_READDIR if readdir() is
1316 available to read directory entries.
1317
1318d_readlink (d_readlink.U):
1319 This variable conditionally defines the HAS_READLINK symbol, which
1320 indicates to the C program that the readlink() routine is available
1321 to read the value of a symbolic link.
1322
4e0554ec
JH
1323d_readv (d_readv.U):
1324 This variable conditionally defines the HAS_READV symbol, which
1325 indicates to the C program that the readv() routine is available.
1326
1327d_recvmsg (d_recvmsg.U):
1328 This variable conditionally defines the HAS_RECVMSG symbol, which
1329 indicates to the C program that the recvmsg() routine is available.
1330
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1331d_rename (d_rename.U):
1332 This variable conditionally defines the HAS_RENAME symbol, which
1333 indicates to the C program that the rename() routine is available
1334 to rename files.
1335
1336d_rewinddir (d_readdir.U):
1337 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1338 available.
1339
1340d_rmdir (d_rmdir.U):
1341 This variable conditionally defines HAS_RMDIR if rmdir() is
1342 available to remove directories.
1343
1344d_safebcpy (d_safebcpy.U):
1345 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1346 the bcopy() routine can do overlapping copies. Normally, you
1347 should probably use memmove().
781b178c
JH
1348
1349d_safemcpy (d_safemcpy.U):
1350 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1351 the memcpy() routine can do overlapping copies.
b6cc3bc4 1352 For overlapping copies, memmove() should be used, if available.
781b178c
JH
1353
1354d_sanemcmp (d_sanemcmp.U):
1355 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1356 the memcpy() routine is available and can be used to compare relative
1357 magnitudes of chars with their high bits set.
1358
ef9f17be
JH
1359d_sbrkproto (d_sbrkproto.U):
1360 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1361 which indicates to the C program that the system provides
1362 a prototype for the sbrk() function. Otherwise, it is
1363 up to the program to supply one.
1364
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1365d_sched_yield (d_pthread_y.U):
1366 This variable conditionally defines the HAS_SCHED_YIELD
1367 symbol if the sched_yield routine is available to yield
1368 the execution of the current thread.
1369
1370d_scm_rights (d_socket.U):
1371 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1372 which indicates that the SCM_RIGHTS is available. #ifdef is
1373 not enough because it may be an enum, glibc has been known to do this.
1374
6b356c8e
JH
1375d_SCNfldbl (longdblfio.U):
1376 This variable conditionally defines the PERL_PRIfldbl symbol, which
1377 indiciates that stdio has a symbol to scan long doubles.
1378
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1379d_seekdir (d_readdir.U):
1380 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1381 available.
1382
1383d_select (d_select.U):
1384 This variable conditionally defines HAS_SELECT if select() is
1385 available to select active file descriptors. A <sys/time.h>
1386 inclusion may be necessary for the timeout field.
1387
1388d_sem (d_sem.U):
1389 This variable conditionally defines the HAS_SEM symbol, which
1390 indicates that the entire sem*(2) library is present.
1391
1392d_semctl (d_semctl.U):
1393 This variable conditionally defines the HAS_SEMCTL symbol, which
1394 indicates to the C program that the semctl() routine is available.
1395
1396d_semctl_semid_ds (d_union_semun.U):
1397 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1398 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1399
1400d_semctl_semun (d_union_semun.U):
1401 This variable conditionally defines USE_SEMCTL_SEMUN, which
1402 indicates that union semun is to be used for semctl IPC_STAT.
1403
1404d_semget (d_semget.U):
1405 This variable conditionally defines the HAS_SEMGET symbol, which
1406 indicates to the C program that the semget() routine is available.
1407
1408d_semop (d_semop.U):
1409 This variable conditionally defines the HAS_SEMOP symbol, which
1410 indicates to the C program that the semop() routine is available.
1411
4e0554ec
JH
1412d_sendmsg (d_sendmsg.U):
1413 This variable conditionally defines the HAS_SENDMSG symbol, which
1414 indicates to the C program that the sendmsg() routine is available.
1415
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1416d_setegid (d_setegid.U):
1417 This variable conditionally defines the HAS_SETEGID symbol, which
1418 indicates to the C program that the setegid() routine is available
1419 to change the effective gid of the current program.
1420
1421d_seteuid (d_seteuid.U):
1422 This variable conditionally defines the HAS_SETEUID symbol, which
1423 indicates to the C program that the seteuid() routine is available
1424 to change the effective uid of the current program.
1425
1426d_setgrent (d_setgrent.U):
1427 This variable conditionally defines the HAS_SETGRENT symbol, which
1428 indicates to the C program that the setgrent() routine is available
1429 for initializing sequential access to the group database.
1430
1431d_setgrps (d_setgrps.U):
1432 This variable conditionally defines the HAS_SETGROUPS symbol, which
1433 indicates to the C program that the setgroups() routine is available
1434 to set the list of process groups.
1435
1436d_sethent (d_sethent.U):
1437 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1438 available.
1439
4e0554ec
JH
1440d_setitimer (d_setitimer.U):
1441 This variable conditionally defines the HAS_SETITIMER symbol, which
1442 indicates to the C program that the setitimer() routine is available.
1443
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1444d_setlinebuf (d_setlnbuf.U):
1445 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1446 indicates to the C program that the setlinebuf() routine is available
1447 to change stderr or stdout from block-buffered or unbuffered to a
1448 line-buffered mode.
1449
1450d_setlocale (d_setlocale.U):
1451 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1452 available to handle locale-specific ctype implementations.
1453
1454d_setnent (d_setnent.U):
1455 This variable conditionally defines HAS_SETNETENT if setnetent() is
1456 available.
1457
1458d_setpent (d_setpent.U):
1459 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1460 available.
1461
1462d_setpgid (d_setpgid.U):
1463 This variable conditionally defines the HAS_SETPGID symbol if the
1464 setpgid(pid, gpid) function is available to set process group ID.
1465
1466d_setpgrp2 (d_setpgrp2.U):
1467 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1468 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1469 is available to set the current process group.
1470
1471d_setpgrp (d_setpgrp.U):
1472 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1473 available to set the current process group.
1474
1475d_setprior (d_setprior.U):
1476 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1477 is available to set a process's priority.
1478
af960fef
JH
1479d_setproctitle (d_setproctitle.U):
1480 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1481 which indicates to the C program that the setproctitle() routine
1482 is available.
1483
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1484d_setpwent (d_setpwent.U):
1485 This variable conditionally defines the HAS_SETPWENT symbol, which
1486 indicates to the C program that the setpwent() routine is available
1487 for initializing sequential access to the passwd database.
1488
1489d_setregid (d_setregid.U):
1490 This variable conditionally defines HAS_SETREGID if setregid() is
1491 available to change the real and effective gid of the current
1492 process.
1493
1494d_setresgid (d_setregid.U):
1495 This variable conditionally defines HAS_SETRESGID if setresgid() is
1496 available to change the real, effective and saved gid of the current
1497 process.
1498
1499d_setresuid (d_setreuid.U):
1500 This variable conditionally defines HAS_SETREUID if setresuid() is
1501 available to change the real, effective and saved uid of the current
1502 process.
1503
1504d_setreuid (d_setreuid.U):
1505 This variable conditionally defines HAS_SETREUID if setreuid() is
1506 available to change the real and effective uid of the current
1507 process.
1508
1509d_setrgid (d_setrgid.U):
1510 This variable conditionally defines the HAS_SETRGID symbol, which
1511 indicates to the C program that the setrgid() routine is available
1512 to change the real gid of the current program.
1513
1514d_setruid (d_setruid.U):
1515 This variable conditionally defines the HAS_SETRUID symbol, which
1516 indicates to the C program that the setruid() routine is available
1517 to change the real uid of the current program.
1518
1519d_setsent (d_setsent.U):
1520 This variable conditionally defines HAS_SETSERVENT if setservent() is
1521 available.
1522
1523d_setsid (d_setsid.U):
1524 This variable conditionally defines HAS_SETSID if setsid() is
1525 available to set the process group ID.
1526
781b178c
JH
1527d_setvbuf (d_setvbuf.U):
1528 This variable conditionally defines the HAS_SETVBUF symbol, which
1529 indicates to the C program that the setvbuf() routine is available
1530 to change buffering on an open stdio stream.
1531
1532d_sfio (d_sfio.U):
1533 This variable conditionally defines the USE_SFIO symbol,
1534 and indicates whether sfio is available (and should be used).
1535
1536d_shm (d_shm.U):
1537 This variable conditionally defines the HAS_SHM symbol, which
1538 indicates that the entire shm*(2) library is present.
1539
1540d_shmat (d_shmat.U):
1541 This variable conditionally defines the HAS_SHMAT symbol, which
1542 indicates to the C program that the shmat() routine is available.
1543
1544d_shmatprototype (d_shmat.U):
1545 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1546 symbol, which indicates that sys/shm.h has a prototype for
1547 shmat.
1548
1549d_shmctl (d_shmctl.U):
1550 This variable conditionally defines the HAS_SHMCTL symbol, which
1551 indicates to the C program that the shmctl() routine is available.
1552
1553d_shmdt (d_shmdt.U):
1554 This variable conditionally defines the HAS_SHMDT symbol, which
1555 indicates to the C program that the shmdt() routine is available.
1556
1557d_shmget (d_shmget.U):
1558 This variable conditionally defines the HAS_SHMGET symbol, which
1559 indicates to the C program that the shmget() routine is available.
1560
1561d_sigaction (d_sigaction.U):
1562 This variable conditionally defines the HAS_SIGACTION symbol, which
1563 indicates that the Vr4 sigaction() routine is available.
1564
983dbef6
JH
1565d_sigprocmask (d_sigprocmask.U):
1566 This variable conditionally defines HAS_SIGPROCMASK
1567 if sigprocmask() is available to examine or change the signal mask
1568 of the calling process.
1569
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JH
1570d_sigsetjmp (d_sigsetjmp.U):
1571 This variable conditionally defines the HAS_SIGSETJMP symbol,
1572 which indicates that the sigsetjmp() routine is available to
1573 call setjmp() and optionally save the process's signal mask.
1574
49a78c82
JH
1575d_sockatmark (d_sockatmark.U):
1576 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1577 indicates to the C program that the sockatmark() routine is available.
1578
5af95cda
JH
1579d_sockatmarkproto (d_sockatmarkproto.U):
1580 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1581 which indicates to the C program that the system provides
1582 a prototype for the sockatmark() function. Otherwise, it is
1583 up to the program to supply one.
1584
781b178c
JH
1585d_socket (d_socket.U):
1586 This variable conditionally defines HAS_SOCKET, which indicates
1587 that the BSD socket interface is supported.
1588
13b3f787
JH
1589d_socklen_t (d_socklen_t.U):
1590 This symbol will be defined if the C compiler supports socklen_t.
1591
781b178c
JH
1592d_sockpair (d_socket.U):
1593 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1594 indicates that the BSD socketpair() is supported.
1595
6b356c8e
JH
1596d_socks5_init (d_socks5_init.U):
1597 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1598 indicates to the C program that the socks5_init() routine is available.
1599
68d4903c
JH
1600d_sqrtl (d_sqrtl.U):
1601 This variable conditionally defines the HAS_SQRTL symbol, which
1602 indicates to the C program that the sqrtl() routine is available.
1603
eef837ea
JH
1604d_sresgproto (d_sresgproto.U):
1605 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1606 which indicates to the C program that the system provides
1607 a prototype for the setresgid() function. Otherwise, it is
1608 up to the program to supply one.
1609
640374d0
JH
1610d_sresuproto (d_sresuproto.U):
1611 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1612 which indicates to the C program that the system provides
1613 a prototype for the setresuid() function. Otherwise, it is
1614 up to the program to supply one.
1615
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1616d_statblks (d_statblks.U):
1617 This variable conditionally defines USE_STAT_BLOCKS
1618 if this system has a stat structure declaring
1619 st_blksize and st_blocks.
1620
ad27e871 1621d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1622 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
1623 symbol, which indicates to struct statfs from has f_flags member.
1624 This kind of struct statfs is coming from sys/mount.h (BSD),
1625 not from sys/statfs.h (SYSV).
1626
ad27e871 1627d_statfs_s (d_statfs_s.U):
0545a864
JH
1628 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1629 which indicates that the struct statfs is supported.
1630
781b178c
JH
1631d_statvfs (d_statvfs.U):
1632 This variable conditionally defines the HAS_STATVFS symbol, which
1633 indicates to the C program that the statvfs() routine is available.
1634
1635d_stdio_cnt_lval (d_stdstdio.U):
1636 This variable conditionally defines STDIO_CNT_LVALUE if the
1637 FILE_cnt macro can be used as an lvalue.
1638
1639d_stdio_ptr_lval (d_stdstdio.U):
1640 This variable conditionally defines STDIO_PTR_LVALUE if the
1641 FILE_ptr macro can be used as an lvalue.
1642
a7ffa9b9
NC
1643d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1644 This symbol is defined if using the FILE_ptr macro as an lvalue
1645 to increase the pointer by n leaves File_cnt(fp) unchanged.
1646
1647d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1648 This symbol is defined if using the FILE_ptr macro as an lvalue
1649 to increase the pointer by n has the side effect of decreasing the
1650 value of File_cnt(fp) by n.
1651
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1652d_stdio_stream_array (stdio_streams.U):
1653 This variable tells whether there is an array holding
1654 the stdio streams.
1655
1656d_stdiobase (d_stdstdio.U):
1657 This variable conditionally defines USE_STDIO_BASE if this system
1658 has a FILE structure declaring a usable _base field (or equivalent)
1659 in stdio.h.
1660
1661d_stdstdio (d_stdstdio.U):
1662 This variable conditionally defines USE_STDIO_PTR if this system
1663 has a FILE structure declaring usable _ptr and _cnt fields (or
1664 equivalent) in stdio.h.
1665
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1666d_strchr (d_strchr.U):
1667 This variable conditionally defines HAS_STRCHR if strchr() and
1668 strrchr() are available for string searching.
1669
1670d_strcoll (d_strcoll.U):
1671 This variable conditionally defines HAS_STRCOLL if strcoll() is
1672 available to compare strings using collating information.
1673
1674d_strctcpy (d_strctcpy.U):
1675 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1676 indicates to the C program that this C compiler knows how to copy
1677 structures.
1678
1679d_strerrm (d_strerror.U):
1680 This variable holds what Strerrr is defined as to translate an error
1681 code condition into an error message string. It could be 'strerror'
1682 or a more complex macro emulating strrror with sys_errlist[], or the
1683 "unknown" string when both strerror and sys_errlist are missing.
1684
1685d_strerror (d_strerror.U):
1686 This variable conditionally defines HAS_STRERROR if strerror() is
1687 available to translate error numbers to strings.
1688
b3c85772
JH
1689d_strftime (d_strftime.U):
1690 This variable conditionally defines the HAS_STRFTIME symbol, which
1691 indicates to the C program that the strftime() routine is available.
1692
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1693d_strtod (d_strtod.U):
1694 This variable conditionally defines the HAS_STRTOD symbol, which
1695 indicates to the C program that the strtod() routine is available
1696 to provide better numeric string conversion than atof().
1697
1698d_strtol (d_strtol.U):
1699 This variable conditionally defines the HAS_STRTOL symbol, which
1700 indicates to the C program that the strtol() routine is available
1701 to provide better numeric string conversion than atoi() and friends.
1702
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1703d_strtold (d_strtold.U):
1704 This variable conditionally defines the HAS_STRTOLD symbol, which
1705 indicates to the C program that the strtold() routine is available.
1706
76d49b1c
JH
1707d_strtoll (d_strtoll.U):
1708 This variable conditionally defines the HAS_STRTOLL symbol, which
1709 indicates to the C program that the strtoll() routine is available.
1710
d0e6d399
NC
1711d_strtoq (d_strtoq.U):
1712 This variable conditionally defines the HAS_STRTOQ symbol, which
1713 indicates to the C program that the strtoq() routine is available.
1714
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1715d_strtoul (d_strtoul.U):
1716 This variable conditionally defines the HAS_STRTOUL symbol, which
1717 indicates to the C program that the strtoul() routine is available
1718 to provide conversion of strings to unsigned long.
1719
ff935051 1720d_strtoull (d_strtoull.U):
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JH
1721 This variable conditionally defines the HAS_STRTOULL symbol, which
1722 indicates to the C program that the strtoull() routine is available.
1723
ff935051
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1724d_strtouq (d_strtouq.U):
1725 This variable conditionally defines the HAS_STRTOUQ symbol, which
1726 indicates to the C program that the strtouq() routine is available.
1727
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1728d_strxfrm (d_strxfrm.U):
1729 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1730 available to transform strings.
1731
1732d_suidsafe (d_dosuid.U):
1733 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1734 if setuid scripts can be secure. This test looks in /dev/fd/.
1735
1736d_symlink (d_symlink.U):
1737 This variable conditionally defines the HAS_SYMLINK symbol, which
1738 indicates to the C program that the symlink() routine is available
1739 to create symbolic links.
1740
1741d_syscall (d_syscall.U):
1742 This variable conditionally defines HAS_SYSCALL if syscall() is
1743 available call arbitrary system calls.
1744
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1745d_syscallproto (d_syscallproto.U):
1746 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1747 which indicates to the C program that the system provides
1748 a prototype for the syscall() function. Otherwise, it is
1749 up to the program to supply one.
1750
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1751d_sysconf (d_sysconf.U):
1752 This variable conditionally defines the HAS_SYSCONF symbol, which
1753 indicates to the C program that the sysconf() routine is available
1754 to determine system related limits and options.
1755
1756d_sysernlst (d_strerror.U):
1757 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1758 is available to translate error numbers to the symbolic name.
1759
1760d_syserrlst (d_strerror.U):
1761 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1762 available to translate error numbers to strings.
1763
1764d_system (d_system.U):
1765 This variable conditionally defines HAS_SYSTEM if system() is
1766 available to issue a shell command.
1767
1768d_tcgetpgrp (d_tcgtpgrp.U):
1769 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1770 indicates to the C program that the tcgetpgrp() routine is available.
1771 to get foreground process group ID.
1772
1773d_tcsetpgrp (d_tcstpgrp.U):
1774 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1775 indicates to the C program that the tcsetpgrp() routine is available
1776 to set foreground process group ID.
1777
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1778d_telldir (d_readdir.U):
1779 This variable conditionally defines HAS_TELLDIR if telldir() is
1780 available.
1781
1782d_telldirproto (d_telldirproto.U):
1783 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1784 which indicates to the C program that the system provides
1785 a prototype for the telldir() function. Otherwise, it is
1786 up to the program to supply one.
1787
1788d_time (d_time.U):
1789 This variable conditionally defines the HAS_TIME symbol, which indicates
1790 that the time() routine exists. The time() routine is normaly
1791 provided on UNIX systems.
1792
1793d_times (d_times.U):
1794 This variable conditionally defines the HAS_TIMES symbol, which indicates
1795 that the times() routine exists. The times() routine is normaly
1796 provided on UNIX systems. You may have to include <sys/times.h>.
1797
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1798d_tm_tm_gmtoff (i_time.U):
1799 This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates
1800 indicates to the C program that the struct tm has the tm_gmtoff field.
1801
1802d_tm_tm_zone (i_time.U):
1803 This variable conditionally defines HAS_TM_TM_ZONE, which indicates
1804 indicates to the C program that the struct tm has the tm_zone field.
1805
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1806d_truncate (d_truncate.U):
1807 This variable conditionally defines HAS_TRUNCATE if truncate() is
1808 available to truncate files.
1809
1810d_tzname (d_tzname.U):
1811 This variable conditionally defines HAS_TZNAME if tzname[] is
1812 available to access timezone names.
1813
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1814d_u32align (d_u32align.U):
1815 This variable tells whether you must access character data
1816 through U32-aligned pointers.
1817
1818d_ualarm (d_ualarm.U):
1819 This variable conditionally defines the HAS_UALARM symbol, which
1820 indicates to the C program that the ualarm() routine is available.
1821
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1822d_umask (d_umask.U):
1823 This variable conditionally defines the HAS_UMASK symbol, which
1824 indicates to the C program that the umask() routine is available.
1825 to set and get the value of the file creation mask.
1826
1827d_uname (d_gethname.U):
1828 This variable conditionally defines the HAS_UNAME symbol, which
1829 indicates to the C program that the uname() routine may be
1830 used to derive the host name.
1831
1832d_union_semun (d_union_semun.U):
1833 This variable conditionally defines HAS_UNION_SEMUN if the
1834 union semun is defined by including <sys/sem.h>.
1835
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JH
1836d_unordered (d_unordered.U):
1837 This variable conditionally defines the HAS_UNORDERED symbol, which
1838 indicates to the C program that the unordered() routine is available.
1839
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1840d_usleep (d_usleep.U):
1841 This variable conditionally defines HAS_USLEEP if usleep() is
1842 available to do high granularity sleeps.
1843
5af95cda
JH
1844d_usleepproto (d_usleepproto.U):
1845 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1846 which indicates to the C program that the system provides
1847 a prototype for the usleep() function. Otherwise, it is
1848 up to the program to supply one.
1849
0545a864
JH
1850d_ustat (d_ustat.U):
1851 This variable conditionally defines HAS_USTAT if ustat() is
1852 available to query file system statistics by dev_t.
1853
526fdc24
MS
1854d_vendorarch (vendorarch.U):
1855 This variable conditionally defined PERL_VENDORARCH.
1856
0617aed7
JH
1857d_vendorbin (vendorbin.U):
1858 This variable conditionally defines PERL_VENDORBIN.
1859
a3635516
JH
1860d_vendorlib (vendorlib.U):
1861 This variable conditionally defines PERL_VENDORLIB.
1862
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1863d_vfork (d_vfork.U):
1864 This variable conditionally defines the HAS_VFORK symbol, which
1865 indicates the vfork() routine is available.
1866
1867d_void_closedir (d_closedir.U):
1868 This variable conditionally defines VOID_CLOSEDIR if closedir()
1869 does not return a value.
1870
1871d_voidsig (d_voidsig.U):
1872 This variable conditionally defines VOIDSIG if this system
1873 declares "void (*signal(...))()" in signal.h. The old way was to
1874 declare it as "int (*signal(...))()".
1875
1876d_voidtty (i_sysioctl.U):
1877 This variable conditionally defines USE_IOCNOTTY to indicate that the
1878 ioctl() call with TIOCNOTTY should be used to void tty association.
1879 Otherwise (on USG probably), it is enough to close the standard file
1880 decriptors and do a setpgrp().
1881
1882d_volatile (d_volatile.U):
1883 This variable conditionally defines the HASVOLATILE symbol, which
1884 indicates to the C program that this C compiler knows about the
1885 volatile declaration.
1886
1887d_vprintf (d_vprintf.U):
1888 This variable conditionally defines the HAS_VPRINTF symbol, which
1889 indicates to the C program that the vprintf() routine is available
1890 to printf with a pointer to an argument list.
1891
1892d_wait4 (d_wait4.U):
1893 This variable conditionally defines the HAS_WAIT4 symbol, which
1894 indicates the wait4() routine is available.
1895
1896d_waitpid (d_waitpid.U):
1897 This variable conditionally defines HAS_WAITPID if waitpid() is
1898 available to wait for child process.
1899
1900d_wcstombs (d_wcstombs.U):
1901 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1902 indicates to the C program that the wcstombs() routine is available
1903 to convert wide character strings to multibyte strings.
1904
1905d_wctomb (d_wctomb.U):
1906 This variable conditionally defines the HAS_WCTOMB symbol, which
1907 indicates to the C program that the wctomb() routine is available
1908 to convert a wide character to a multibyte.
1909
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JH
1910d_writev (d_writev.U):
1911 This variable conditionally defines the HAS_WRITEV symbol, which
1912 indicates to the C program that the writev() routine is available.
1913
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1914d_xenix (Guess.U):
1915 This variable conditionally defines the symbol XENIX, which alerts
1916 the C program that it runs under Xenix.
1917
1918date (Loc.U):
5bf26616 1919 This variable is used internally by Configure to determine the
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1920 full pathname (if any) of the date program. After Configure runs,
1921 the value is reset to a plain "date" and is not useful.
1922
1923db_hashtype (i_db.U):
1924 This variable contains the type of the hash structure element
1925 in the <db.h> header file. In older versions of DB, it was
1926 int, while in newer ones it is u_int32_t.
1927
1928db_prefixtype (i_db.U):
1929 This variable contains the type of the prefix structure element
1930 in the <db.h> header file. In older versions of DB, it was
1931 int, while in newer ones it is size_t.
1932
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JH
1933db_version_major (i_db.U):
1934 This variable contains the major version number of
1935 Berkeley DB found in the <db.h> header file.
1936
1937db_version_minor (i_db.U):
1938 This variable contains the minor version number of
1939 Berkeley DB found in the <db.h> header file.
1940 For DB version 1 this is always 0.
1941
1942db_version_patch (i_db.U):
1943 This variable contains the patch version number of
1944 Berkeley DB found in the <db.h> header file.
1945 For DB version 1 this is always 0.
1946
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1947defvoidused (voidflags.U):
1948 This variable contains the default value of the VOIDUSED symbol (15).
1949
1950direntrytype (i_dirent.U):
1951 This symbol is set to 'struct direct' or 'struct dirent' depending on
1952 whether dirent is available or not. You should use this pseudo type to
1953 portably declare your directory entries.
1954
1955dlext (dlext.U):
1956 This variable contains the extension that is to be used for the
1957 dynamically loaded modules that perl generaties.
1958
1959dlsrc (dlsrc.U):
1960 This variable contains the name of the dynamic loading file that
1961 will be used with the package.
1962
1963doublesize (doublesize.U):
1964 This variable contains the value of the DOUBLESIZE symbol, which
1965 indicates to the C program how many bytes there are in a double.
1966
1967drand01 (randfunc.U):
1968 Indicates the macro to be used to generate normalized
1969 random numbers. Uses randfunc, often divided by
1970 (double) (((unsigned long) 1 << randbits)) in order to
1971 normalize the result.
1972 In C programs, the macro 'Drand01' is mapped to drand01.
1973
1974dynamic_ext (Extensions.U):
1975 This variable holds a list of XS extension files we want to
1976 link dynamically into the package. It is used by Makefile.
1977
1978eagain (nblock_io.U):
1979 This variable bears the symbolic errno code set by read() when no
1980 data is present on the file and non-blocking I/O was enabled (otherwise,
1981 read() blocks naturally).
1982
1983ebcdic (ebcdic.U):
1984 This variable conditionally defines EBCDIC if this
1985 system uses EBCDIC encoding. Among other things, this
1986 means that the character ranges are not contiguous.
1987 See trnl.U
1988
1989echo (Loc.U):
5bf26616 1990 This variable is used internally by Configure to determine the
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1991 full pathname (if any) of the echo program. After Configure runs,
1992 the value is reset to a plain "echo" and is not useful.
1993
1994egrep (Loc.U):
5bf26616 1995 This variable is used internally by Configure to determine the
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1996 full pathname (if any) of the egrep program. After Configure runs,
1997 the value is reset to a plain "egrep" and is not useful.
1998
1999emacs (Loc.U):
2000 This variable is defined but not used by Configure.
2001 The value is a plain '' and is not useful.
2002
2003eunicefix (Init.U):
2004 When running under Eunice this variable contains a command which will
2005 convert a shell script to the proper form of text file for it to be
2006 executable by the shell. On other systems it is a no-op.
2007
2008exe_ext (Unix.U):
2009 This is an old synonym for _exe.
2010
2011expr (Loc.U):
5bf26616 2012 This variable is used internally by Configure to determine the
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2013 full pathname (if any) of the expr program. After Configure runs,
2014 the value is reset to a plain "expr" and is not useful.
2015
2016extensions (Extensions.U):
2017 This variable holds a list of all extension files (both XS and
2018 non-xs linked into the package. It is propagated to Config.pm
2019 and is typically used to test whether a particular extesion
2020 is available.
2021
cb7ddd31
JH
2022extras (Extras.U):
2023 This variable holds a list of extra modules to install.
2024
781b178c
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2025fflushall (fflushall.U):
2026 This symbol, if defined, tells that to flush
2027 all pending stdio output one must loop through all
2028 the stdio file handles stored in an array and fflush them.
2029 Note that if fflushNULL is defined, fflushall will not
2030 even be probed for and will be left undefined.
2031
ff935051
JH
2032fflushNULL (fflushall.U):
2033 This symbol, if defined, tells that fflush(NULL) does flush
2034 all pending stdio output.
2035
781b178c 2036find (Loc.U):
ff935051
JH
2037 This variable is defined but not used by Configure.
2038 The value is a plain '' and is not useful.
781b178c
JH
2039
2040firstmakefile (Unix.U):
2041 This variable defines the first file searched by make. On unix,
2042 it is makefile (then Makefile). On case-insensitive systems,
2043 it might be something else. This is only used to deal with
2044 convoluted make depend tricks.
2045
2046flex (Loc.U):
2047 This variable is defined but not used by Configure.
2048 The value is a plain '' and is not useful.
2049
a22e52b9
JH
2050fpossize (fpossize.U):
2051 This variable contains the size of a fpostype in bytes.
2052
781b178c 2053fpostype (fpostype.U):
a22e52b9 2054 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
2055 uint, or whatever type is used to declare file positions in libc.
2056
2057freetype (mallocsrc.U):
2058 This variable contains the return type of free(). It is usually
2059 void, but occasionally int.
2060
5440bc8e
JH
2061from (Cross.U):
2062 This variable contains the command used by Configure
2063 to copy files from the target host. Useful and available
2064 only during Perl build.
2065 The string ':' if not cross-compiling.
2066
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JH
2067full_ar (Loc_ar.U):
2068 This variable contains the full pathname to 'ar', whether or
2069 not the user has specified 'portability'. This is only used
2070 in the Makefile.SH.
2071
2072full_csh (d_csh.U):
2073 This variable contains the full pathname to 'csh', whether or
2074 not the user has specified 'portability'. This is only used
2075 in the compiled C program, and we assume that all systems which
2076 can share this executable will have the same full pathname to
2077 'csh.'
2078
2079full_sed (Loc_sed.U):
2080 This variable contains the full pathname to 'sed', whether or
2081 not the user has specified 'portability'. This is only used
2082 in the compiled C program, and we assume that all systems which
2083 can share this executable will have the same full pathname to
2084 'sed.'
2085
af960fef
JH
2086gccosandvers (gccvers.U):
2087 If GNU cc (gcc) is used, this variable the operating system and
2088 version used to compile the gcc. It is set to '' if not gcc,
2089 or if nothing useful can be parsed as the os version.
2090
2091gccversion (gccvers.U):
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2092 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2093 indicate whether the compiler is version 1 or 2. This is used in
2094 setting some of the default cflags. It is set to '' if not gcc.
2095
a22e52b9
JH
2096gidformat (gidf.U):
2097 This variable contains the format string used for printing a Gid_t.
2098
785fb66b
JH
2099gidsign (gidsign.U):
2100 This variable contains the signedness of a gidtype.
2101 1 for unsigned, -1 for signed.
2102
2103gidsize (gidsize.U):
2104 This variable contains the size of a gidtype in bytes.
2105
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2106gidtype (gidtype.U):
2107 This variable defines Gid_t to be something like gid_t, int,
2108 ushort, or whatever type is used to declare the return type
2109 of getgid(). Typically, it is the type of group ids in the kernel.
2110
2111glibpth (libpth.U):
2112 This variable holds the general path (space-separated) used to
2113 find libraries. It may contain directories that do not exist on
2114 this platform, libpth is the cleaned-up version.
2115
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JH
2116gmake (Loc.U):
2117 This variable is used internally by Configure to determine the
2118 full pathname (if any) of the gmake program. After Configure runs,
2119 the value is reset to a plain "gmake" and is not useful.
2120
781b178c 2121grep (Loc.U):
5bf26616 2122 This variable is used internally by Configure to determine the
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2123 full pathname (if any) of the grep program. After Configure runs,
2124 the value is reset to a plain "grep" and is not useful.
2125
2126groupcat (nis.U):
2127 This variable contains a command that produces the text of the
2128 /etc/group file. This is normally "cat /etc/group", but can be
2129 "ypcat group" when NIS is used.
aaacdc8b
GS
2130 On some systems, such as os390, there may be no equivalent
2131 command, in which case this variable is unset.
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2132
2133groupstype (groupstype.U):
2134 This variable defines Groups_t to be something like gid_t, int,
2135 ushort, or whatever type is used for the second argument to
2136 getgroups() and setgroups(). Usually, this is the same as
2137 gidtype (gid_t), but sometimes it isn't.
2138
2139gzip (Loc.U):
5bf26616 2140 This variable is used internally by Configure to determine the
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2141 full pathname (if any) of the gzip program. After Configure runs,
2142 the value is reset to a plain "gzip" and is not useful.
2143
2144h_fcntl (h_fcntl.U):
2145 This is variable gets set in various places to tell i_fcntl that
2146 <fcntl.h> should be included.
2147
2148h_sysfile (h_sysfile.U):
2149 This is variable gets set in various places to tell i_sys_file that
2150 <sys/file.h> should be included.
2151
2152hint (Oldconfig.U):
2153 Gives the type of hints used for previous answers. May be one of
2154 "default", "recommended" or "previous".
2155
2156hostcat (nis.U):
2157 This variable contains a command that produces the text of the
2158 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2159 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2160 On some systems, such as os390, there may be no equivalent
2161 command, in which case this variable is unset.
781b178c 2162
a22e52b9
JH
2163i16size (perlxv.U):
2164 This variable is the size of an I16 in bytes.
2165
2166i16type (perlxv.U):
2167 This variable contains the C type used for Perl's I16.
2168
2169i32size (perlxv.U):
2170 This variable is the size of an I32 in bytes.
2171
2172i32type (perlxv.U):
2173 This variable contains the C type used for Perl's I32.
2174
2175i64size (perlxv.U):
2176 This variable is the size of an I64 in bytes.
2177
2178i64type (perlxv.U):
2179 This variable contains the C type used for Perl's I64.
2180
2181i8size (perlxv.U):
2182 This variable is the size of an I8 in bytes.
2183
2184i8type (perlxv.U):
2185 This variable contains the C type used for Perl's I8.
2186
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2187i_arpainet (i_arpainet.U):
2188 This variable conditionally defines the I_ARPA_INET symbol,
2189 and indicates whether a C program should include <arpa/inet.h>.
2190
2191i_bsdioctl (i_sysioctl.U):
2192 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2193 indicates to the C program that <sys/bsdioctl.h> exists and should
2194 be included.
2195
2196i_db (i_db.U):
2197 This variable conditionally defines the I_DB symbol, and indicates
2198 whether a C program may include Berkeley's DB include file <db.h>.
2199
2200i_dbm (i_dbm.U):
2201 This variable conditionally defines the I_DBM symbol, which
2202 indicates to the C program that <dbm.h> exists and should
2203 be included.
2204
2205i_dirent (i_dirent.U):
2206 This variable conditionally defines I_DIRENT, which indicates
2207 to the C program that it should include <dirent.h>.
2208
2209i_dld (i_dld.U):
2210 This variable conditionally defines the I_DLD symbol, which
2211 indicates to the C program that <dld.h> (GNU dynamic loading)
2212 exists and should be included.
2213
2214i_dlfcn (i_dlfcn.U):
2215 This variable conditionally defines the I_DLFCN symbol, which
2216 indicates to the C program that <dlfcn.h> exists and should
2217 be included.
2218
2219i_fcntl (i_fcntl.U):
2220 This variable controls the value of I_FCNTL (which tells
2221 the C program to include <fcntl.h>).
2222
2223i_float (i_float.U):
2224 This variable conditionally defines the I_FLOAT symbol, and indicates
2225 whether a C program may include <float.h> to get symbols like DBL_MAX
2226 or DBL_MIN, i.e. machine dependent floating point values.
2227
758a5d79
JH
2228i_fp (i_fp.U):
2229 This variable conditionally defines the I_FP symbol, and indicates
2230 whether a C program should include <fp.h>.
2231
2232i_fp_class (i_fp_class.U):
2233 This variable conditionally defines the I_FP_CLASS symbol, and indicates
2234 whether a C program should include <fp_class.h>.
2235
781b178c
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2236i_gdbm (i_gdbm.U):
2237 This variable conditionally defines the I_GDBM symbol, which
2238 indicates to the C program that <gdbm.h> exists and should
2239 be included.
2240
2241i_grp (i_grp.U):
2242 This variable conditionally defines the I_GRP symbol, and indicates
2243 whether a C program should include <grp.h>.
2244
792d8dab
JH
2245i_ieeefp (i_ieeefp.U):
2246 This variable conditionally defines the I_IEEEFP symbol, and indicates
2247 whether a C program should include <ieeefp.h>.
2248
781b178c
JH
2249i_inttypes (i_inttypes.U):
2250 This variable conditionally defines the I_INTTYPES symbol,
2251 and indicates whether a C program should include <inttypes.h>.
2252
2765b840
JH
2253i_langinfo (i_langinfo.U):
2254 This variable conditionally defines the I_LANGINFO symbol,
2255 and indicates whether a C program should include <langinfo.h>.
2256
af960fef
JH
2257i_libutil (i_libutil.U):
2258 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2259 whether a C program should include <libutil.h>.
2260
781b178c
JH
2261i_limits (i_limits.U):
2262 This variable conditionally defines the I_LIMITS symbol, and indicates
2263 whether a C program may include <limits.h> to get symbols like WORD_BIT
2264 and friends.
2265
2266i_locale (i_locale.U):
2267 This variable conditionally defines the I_LOCALE symbol,
2268 and indicates whether a C program should include <locale.h>.
2269
2270i_machcthr (i_machcthr.U):
2271 This variable conditionally defines the I_MACH_CTHREADS symbol,
2272 and indicates whether a C program should include <mach/cthreads.h>.
2273
2274i_malloc (i_malloc.U):
2275 This variable conditionally defines the I_MALLOC symbol, and indicates
2276 whether a C program should include <malloc.h>.
2277
2278i_math (i_math.U):
2279 This variable conditionally defines the I_MATH symbol, and indicates
2280 whether a C program may include <math.h>.
2281
2282i_memory (i_memory.U):
2283 This variable conditionally defines the I_MEMORY symbol, and indicates
2284 whether a C program should include <memory.h>.
2285
2286i_mntent (i_mntent.U):
2287 This variable conditionally defines the I_MNTENT symbol, and indicates
2288 whether a C program should include <mntent.h>.
2289
2290i_ndbm (i_ndbm.U):
2291 This variable conditionally defines the I_NDBM symbol, which
2292 indicates to the C program that <ndbm.h> exists and should
2293 be included.
2294
2295i_netdb (i_netdb.U):
2296 This variable conditionally defines the I_NETDB symbol, and indicates
2297 whether a C program should include <netdb.h>.
2298
2299i_neterrno (i_neterrno.U):
2300 This variable conditionally defines the I_NET_ERRNO symbol, which
2301 indicates to the C program that <net/errno.h> exists and should
2302 be included.
2303
2304i_netinettcp (i_netinettcp.U):
2305 This variable conditionally defines the I_NETINET_TCP symbol,
2306 and indicates whether a C program should include <netinet/tcp.h>.
2307
2308i_niin (i_niin.U):
2309 This variable conditionally defines I_NETINET_IN, which indicates
2310 to the C program that it should include <netinet/in.h>. Otherwise,
2311 you may try <sys/in.h>.
2312
2313i_poll (i_poll.U):
2314 This variable conditionally defines the I_POLL symbol, and indicates
2315 whether a C program should include <poll.h>.
2316
3813c136
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2317i_prot (i_prot.U):
2318 This variable conditionally defines the I_PROT symbol, and indicates
2319 whether a C program should include <prot.h>.
2320
781b178c 2321i_pthread (i_pthread.U):
190b66db 2322 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2323 and indicates whether a C program should include <pthread.h>.
2324
2325i_pwd (i_pwd.U):
2326 This variable conditionally defines I_PWD, which indicates
2327 to the C program that it should include <pwd.h>.
2328
2329i_rpcsvcdbm (i_dbm.U):
2330 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2331 indicates to the C program that <rpcsvc/dbm.h> exists and should
2332 be included. Some System V systems might need this instead of <dbm.h>.
2333
2334i_sfio (i_sfio.U):
2335 This variable conditionally defines the I_SFIO symbol,
2336 and indicates whether a C program should include <sfio.h>.
2337
2338i_sgtty (i_termio.U):
2339 This variable conditionally defines the I_SGTTY symbol, which
2340 indicates to the C program that it should include <sgtty.h> rather
2341 than <termio.h>.
2342
2343i_shadow (i_shadow.U):
2344 This variable conditionally defines the I_SHADOW symbol, and indicates
2345 whether a C program should include <shadow.h>.
2346
2347i_socks (i_socks.U):
2348 This variable conditionally defines the I_SOCKS symbol, and indicates
2349 whether a C program should include <socks.h>.
2350
2351i_stdarg (i_varhdr.U):
2352 This variable conditionally defines the I_STDARG symbol, which
2353 indicates to the C program that <stdarg.h> exists and should
2354 be included.
2355
2356i_stddef (i_stddef.U):
2357 This variable conditionally defines the I_STDDEF symbol, which
2358 indicates to the C program that <stddef.h> exists and should
2359 be included.
2360
2361i_stdlib (i_stdlib.U):
2362 This variable conditionally defines the I_STDLIB symbol, which
2363 indicates to the C program that <stdlib.h> exists and should
2364 be included.
2365
2366i_string (i_string.U):
2367 This variable conditionally defines the I_STRING symbol, which
2368 indicates that <string.h> should be included rather than <strings.h>.
2369
792d8dab
JH
2370i_sunmath (i_sunmath.U):
2371 This variable conditionally defines the I_SUNMATH symbol, and indicates
2372 whether a C program should include <sunmath.h>.
2373
781b178c
JH
2374i_sysaccess (i_sysaccess.U):
2375 This variable conditionally defines the I_SYS_ACCESS symbol,
2376 and indicates whether a C program should include <sys/access.h>.
2377
2378i_sysdir (i_sysdir.U):
2379 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2380 whether a C program should include <sys/dir.h>.
2381
2382i_sysfile (i_sysfile.U):
2383 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2384 whether a C program should include <sys/file.h> to get R_OK and friends.
2385
2386i_sysfilio (i_sysioctl.U):
2387 This variable conditionally defines the I_SYS_FILIO symbol, which
2388 indicates to the C program that <sys/filio.h> exists and should
2389 be included in preference to <sys/ioctl.h>.
2390
2391i_sysin (i_niin.U):
2392 This variable conditionally defines I_SYS_IN, which indicates
2393 to the C program that it should include <sys/in.h> instead of
2394 <netinet/in.h>.
2395
2396i_sysioctl (i_sysioctl.U):
2397 This variable conditionally defines the I_SYS_IOCTL symbol, which
2398 indicates to the C program that <sys/ioctl.h> exists and should
2399 be included.
2400
ca52efda
JH
2401i_syslog (i_syslog.U):
2402 This variable conditionally defines the I_SYSLOG symbol,
2403 and indicates whether a C program should include <syslog.h>.
2404
fe749a9f
JH
2405i_sysmman (i_sysmman.U):
2406 This variable conditionally defines the I_SYS_MMAN symbol, and
2407 indicates whether a C program should include <sys/mman.h>.
2408
87b71857
JH
2409i_sysmode (i_sysmode.U):
2410 This variable conditionally defines the I_SYSMODE symbol,
2411 and indicates whether a C program should include <sys/mode.h>.
2412
781b178c
JH
2413i_sysmount (i_sysmount.U):
2414 This variable conditionally defines the I_SYSMOUNT symbol,
2415 and indicates whether a C program should include <sys/mount.h>.
2416
2417i_sysndir (i_sysndir.U):
2418 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2419 whether a C program should include <sys/ndir.h>.
2420
2421i_sysparam (i_sysparam.U):
2422 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2423 whether a C program should include <sys/param.h>.
2424
2425i_sysresrc (i_sysresrc.U):
2426 This variable conditionally defines the I_SYS_RESOURCE symbol,
2427 and indicates whether a C program should include <sys/resource.h>.
2428
2429i_syssecrt (i_syssecrt.U):
2430 This variable conditionally defines the I_SYS_SECURITY symbol,
2431 and indicates whether a C program should include <sys/security.h>.
2432
2433i_sysselct (i_sysselct.U):
2434 This variable conditionally defines I_SYS_SELECT, which indicates
2435 to the C program that it should include <sys/select.h> in order to
2436 get the definition of struct timeval.
2437
2438i_syssockio (i_sysioctl.U):
2439 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2440 C program that socket ioctl codes may be found in <sys/sockio.h>
2441 instead of <sys/ioctl.h>.
2442
2443i_sysstat (i_sysstat.U):
2444 This variable conditionally defines the I_SYS_STAT symbol,
2445 and indicates whether a C program should include <sys/stat.h>.
2446
0545a864
JH
2447i_sysstatfs (i_sysstatfs.U):
2448 This variable conditionally defines the I_SYSSTATFS symbol,
2449 and indicates whether a C program should include <sys/statfs.h>.
2450
781b178c
JH
2451i_sysstatvfs (i_sysstatvfs.U):
2452 This variable conditionally defines the I_SYSSTATVFS symbol,
2453 and indicates whether a C program should include <sys/statvfs.h>.
2454
2455i_systime (i_time.U):
2456 This variable conditionally defines I_SYS_TIME, which indicates
2457 to the C program that it should include <sys/time.h>.
2458
2459i_systimek (i_time.U):
2460 This variable conditionally defines I_SYS_TIME_KERNEL, which
2461 indicates to the C program that it should include <sys/time.h>
2462 with KERNEL defined.
2463
2464i_systimes (i_systimes.U):
2465 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2466 whether a C program should include <sys/times.h>.
2467
2468i_systypes (i_systypes.U):
2469 This variable conditionally defines the I_SYS_TYPES symbol,
2470 and indicates whether a C program should include <sys/types.h>.
2471
2472i_sysuio (i_sysuio.U):
2473 This variable conditionally defines the I_SYSUIO symbol, and indicates
2474 whether a C program should include <sys/uio.h>.
2475
2476i_sysun (i_sysun.U):
2477 This variable conditionally defines I_SYS_UN, which indicates
2478 to the C program that it should include <sys/un.h> to get UNIX
2479 domain socket definitions.
2480
d4935d7f
JH
2481i_sysutsname (i_sysutsname.U):
2482 This variable conditionally defines the I_SYSUTSNAME symbol,
2483 and indicates whether a C program should include <sys/utsname.h>.
2484
0545a864
JH
2485i_sysvfs (i_sysvfs.U):
2486 This variable conditionally defines the I_SYSVFS symbol,
2487 and indicates whether a C program should include <sys/vfs.h>.
2488
781b178c
JH
2489i_syswait (i_syswait.U):
2490 This variable conditionally defines I_SYS_WAIT, which indicates
2491 to the C program that it should include <sys/wait.h>.
2492
2493i_termio (i_termio.U):
2494 This variable conditionally defines the I_TERMIO symbol, which
2495 indicates to the C program that it should include <termio.h> rather
2496 than <sgtty.h>.
2497
2498i_termios (i_termio.U):
2499 This variable conditionally defines the I_TERMIOS symbol, which
2500 indicates to the C program that the POSIX <termios.h> file is
2501 to be included.
2502
2503i_time (i_time.U):
2504 This variable conditionally defines I_TIME, which indicates
2505 to the C program that it should include <time.h>.
2506
2507i_unistd (i_unistd.U):
2508 This variable conditionally defines the I_UNISTD symbol, and indicates
2509 whether a C program should include <unistd.h>.
2510
0545a864
JH
2511i_ustat (i_ustat.U):
2512 This variable conditionally defines the I_USTAT symbol, and indicates
2513 whether a C program should include <ustat.h>.
2514
781b178c
JH
2515i_utime (i_utime.U):
2516 This variable conditionally defines the I_UTIME symbol, and indicates
2517 whether a C program should include <utime.h>.
2518
2519i_values (i_values.U):
2520 This variable conditionally defines the I_VALUES symbol, and indicates
2521 whether a C program may include <values.h> to get symbols like MAXLONG
2522 and friends.
2523
2524i_varargs (i_varhdr.U):
2525 This variable conditionally defines I_VARARGS, which indicates
2526 to the C program that it should include <varargs.h>.
2527
2528i_varhdr (i_varhdr.U):
2529 Contains the name of the header to be included to get va_dcl definition.
2530 Typically one of varargs.h or stdarg.h.
2531
2532i_vfork (i_vfork.U):
2533 This variable conditionally defines the I_VFORK symbol, and indicates
2534 whether a C program should include vfork.h.
2535
2536ignore_versioned_solibs (libs.U):
2537 This variable should be non-empty if non-versioned shared
2538 libraries (libfoo.so.x.y) are to be ignored (because they
2539 cannot be linked against).
2540
ff935051
JH
2541inc_version_list (inc_version_list.U):
2542 This variable specifies the list of subdirectories in over
2543 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
2544 search when adding directories to @INC. The elements in
2545 the list are separated by spaces. This is only useful
ff935051
JH
2546 if you have a perl library directory tree structured like the
2547 default one. See INSTALL for how this works. The versioned
2548 site_perl directory was introduced in 5.005, so that is the
2549 lowest possible value.
2550
3a096bf3
JH
2551inc_version_list_init (inc_version_list.U):
2552 This variable holds the same list as inc_version_list, but
2553 each item is enclosed in double quotes and separated by commas,
2554 suitable for use in the PERL_INC_VERSION_LIST initialization.
2555
781b178c 2556incpath (usrinc.U):
209e5c0a
JH
2557 This variable must preceed the normal include path to get hte
2558 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
781b178c
JH
2559 Value can be "" or "/bsd43" on mips.
2560
2561inews (Loc.U):
2562 This variable is defined but not used by Configure.
2563 The value is a plain '' and is not useful.
2564
2565installarchlib (archlib.U):
2566 This variable is really the same as archlibexp but may differ on
2567 those systems using AFS. For extra portability, only this variable
2568 should be used in makefiles.
2569
2570installbin (bin.U):
2571 This variable is the same as binexp unless AFS is running in which case
2572 the user is explicitely prompted for it. This variable should always
2573 be used in your makefiles for maximum portability.
2574
2575installman1dir (man1dir.U):
2576 This variable is really the same as man1direxp, unless you are using
2577 AFS in which case it points to the read/write location whereas
2578 man1direxp only points to the read-only access location. For extra
2579 portability, you should only use this variable within your makefiles.
2580
2581installman3dir (man3dir.U):
2582 This variable is really the same as man3direxp, unless you are using
2583 AFS in which case it points to the read/write location whereas
2584 man3direxp only points to the read-only access location. For extra
2585 portability, you should only use this variable within your makefiles.
2586
2587installprefix (installprefix.U):
2588 This variable holds the name of the directory below which
2589 "make install" will install the package. For most users, this
2590 is the same as prefix. However, it is useful for
2591 installing the software into a different (usually temporary)
2592 location after which it can be bundled up and moved somehow
2593 to the final location specified by prefix.
2594
2595installprefixexp (installprefix.U):
2596 This variable holds the full absolute path of installprefix
2597 with all ~-expansion done.
2598
2599installprivlib (privlib.U):
2600 This variable is really the same as privlibexp but may differ on
2601 those systems using AFS. For extra portability, only this variable
2602 should be used in makefiles.
2603
2604installscript (scriptdir.U):
2605 This variable is usually the same as scriptdirexp, unless you are on
2606 a system running AFS, in which case they may differ slightly. You
2607 should always use this variable within your makefiles for portability.
2608
2609installsitearch (sitearch.U):
2610 This variable is really the same as sitearchexp but may differ on
2611 those systems using AFS. For extra portability, only this variable
2612 should be used in makefiles.
2613
0617aed7
JH
2614installsitebin (sitebin.U):
2615 This variable is usually the same as sitebinexp, unless you are on
2616 a system running AFS, in which case they may differ slightly. You
2617 should always use this variable within your makefiles for portability.
2618
781b178c
JH
2619installsitelib (sitelib.U):
2620 This variable is really the same as sitelibexp but may differ on
2621 those systems using AFS. For extra portability, only this variable
2622 should be used in makefiles.
2623
2624installstyle (installstyle.U):
2625 This variable describes the "style" of the perl installation.
2626 This is intended to be useful for tools that need to
2627 manipulate entire perl distributions. Perl itself doesn't use
2628 this to find its libraries -- the library directories are
2629 stored directly in Config.pm. Currently, there are only two
2630 styles: "lib" and "lib/perl5". The default library locations
2631 (e.g. privlib, sitelib) are either $prefix/lib or
2632 $prefix/lib/perl5. The former is useful if $prefix is a
2633 directory dedicated to perl (e.g. /opt/perl), while the latter
2634 is useful if $prefix is shared by many packages, e.g. if
2635 $prefix=/usr/local.
2636 This may later be extended to include other information, so
2637 be careful with pattern-matching on the results.
2638 For compatibility with perl5.005 and earlier, the default
2639 setting is based on whether or not $prefix contains the string
2640 "perl".
2641
2642installusrbinperl (instubperl.U):
2643 This variable tells whether Perl should be installed also as
2644 /usr/bin/perl in addition to
2645 $installbin/perl
2646
526fdc24
MS
2647installvendorarch (vendorarch.U):
2648 This variable is really the same as vendorarchexp but may differ on
2649 those systems using AFS. For extra portability, only this variable
2650 should be used in makefiles.
2651
0617aed7
JH
2652installvendorbin (vendorbin.U):
2653 This variable is really the same as vendorbinexp but may differ on
2654 those systems using AFS. For extra portability, only this variable
2655 should be used in makefiles.
2656
a3635516
JH
2657installvendorlib (vendorlib.U):
2658 This variable is really the same as vendorlibexp but may differ on
2659 those systems using AFS. For extra portability, only this variable
2660 should be used in makefiles.
2661
781b178c
JH
2662intsize (intsize.U):
2663 This variable contains the value of the INTSIZE symbol, which
2664 indicates to the C program how many bytes there are in an int.
2665
4b661809 2666issymlink (issymlink.U):
983dbef6
JH
2667 This variable holds the test command to test for a symbolic link
2668 (if they are supported). Typical values include 'test -h' and
2669 'test -L'.
4b661809 2670
a22e52b9
JH
2671ivdformat (perlxvf.U):
2672 This variable contains the format string used for printing
2673 a Perl IV as a signed decimal integer.
2674
2675ivsize (perlxv.U):
2676 This variable is the size of an IV in bytes.
2677
2678ivtype (perlxv.U):
2679 This variable contains the C type used for Perl's IV.
2680
781b178c
JH
2681known_extensions (Extensions.U):
2682 This variable holds a list of all XS extensions included in
2683 the package.
2684
2685ksh (Loc.U):
2686 This variable is defined but not used by Configure.
2687 The value is a plain '' and is not useful.
2688
781b178c
JH
2689ld (dlsrc.U):
2690 This variable indicates the program to be used to link
2691 libraries for dynamic loading. On some systems, it is 'ld'.
2692 On ELF systems, it should be $cc. Mostly, we'll try to respect
2693 the hint file setting.
2694
2695lddlflags (dlsrc.U):
2696 This variable contains any special flags that might need to be
2697 passed to $ld to create a shared library suitable for dynamic
2698 loading. It is up to the makefile to use it. For hpux, it
2699 should be '-b'. For sunos 4.1, it is empty.
2700
2701ldflags (ccflags.U):
2702 This variable contains any additional C loader flags desired by
2703 the user. It is up to the Makefile to use this.
2704
af960fef
JH
2705ldflags_uselargefiles (uselfs.U):
2706 This variable contains the loader flags needed by large file builds
2707 and added to ldflags by hints files.
2708
781b178c
JH
2709ldlibpthname (libperl.U):
2710 This variable holds the name of the shared library
2711 search path, often LD_LIBRARY_PATH. To get an empty
2712 string, the hints file must set this to 'none'.
2713
2714less (Loc.U):
5bf26616 2715 This variable is used internally by Configure to determine the
781b178c
JH
2716 full pathname (if any) of the less program. After Configure runs,
2717 the value is reset to a plain "less" and is not useful.
2718
2719lib_ext (Unix.U):
2720 This is an old synonym for _a.
2721
2722libc (libc.U):
2723 This variable contains the location of the C library.
2724
2725libperl (libperl.U):
2726 The perl executable is obtained by linking perlmain.c with
2727 libperl, any static extensions (usually just DynaLoader),
2728 and any other libraries needed on this system. libperl
2729 is usually libperl.a, but can also be libperl.so.xxx if
2730 the user wishes to build a perl executable with a shared
2731 library.
2732
2733libpth (libpth.U):
2734 This variable holds the general path (space-separated) used to find
2735 libraries. It is intended to be used by other units.
2736
2737libs (libs.U):
2738 This variable holds the additional libraries we want to use.
2739 It is up to the Makefile to deal with it.
2740
fe749a9f
JH
2741libsdirs (libs.U):
2742 This variable holds the directory names aka dirnames of the libraries
2743 we found and accepted, duplicates are removed.
2744
2745libsfiles (libs.U):
2746 This variable holds the filenames aka basenames of the libraries
2747 we found and accepted.
2748
2749libsfound (libs.U):
2750 This variable holds the full pathnames of the libraries
2751 we found and accepted.
2752
13b3f787
JH
2753libspath (libs.U):
2754 This variable holds the directory names probed for libraries.
2755
781b178c
JH
2756libswanted (Myinit.U):
2757 This variable holds a list of all the libraries we want to
2758 search. The order is chosen to pick up the c library
2759 ahead of ucb or bsd libraries for SVR4.
2760
af960fef
JH
2761libswanted_uselargefiles (uselfs.U):
2762 This variable contains the libraries needed by large file builds
2763 and added to ldflags by hints files. It is a space separated list
2764 of the library names without the "lib" prefix or any suffix, just
209e5c0a 2765 like libswanted..
af960fef 2766
781b178c 2767line (Loc.U):
ff935051
JH
2768 This variable is defined but not used by Configure.
2769 The value is a plain '' and is not useful.
781b178c
JH
2770
2771lint (Loc.U):
2772 This variable is defined but not used by Configure.
2773 The value is a plain '' and is not useful.
2774
2775lkflags (ccflags.U):
2776 This variable contains any additional C partial linker flags desired by
2777 the user. It is up to the Makefile to use this.
2778
2779ln (Loc.U):
5bf26616 2780 This variable is used internally by Configure to determine the
781b178c
JH
2781 full pathname (if any) of the ln program. After Configure runs,
2782 the value is reset to a plain "ln" and is not useful.
2783
2784lns (lns.U):
2785 This variable holds the name of the command to make
2786 symbolic links (if they are supported). It can be used
2787 in the Makefile. It is either 'ln -s' or 'ln'
2788
2789locincpth (ccflags.U):
2790 This variable contains a list of additional directories to be
2791 searched by the compiler. The appropriate '-I' directives will
2792 be added to ccflags. This is intended to simplify setting
2793 local directories from the Configure command line.
2794 It's not much, but it parallels the loclibpth stuff in libpth.U.
2795
2796loclibpth (libpth.U):
2797 This variable holds the paths (space-separated) used to find local
2798 libraries. It is prepended to libpth, and is intended to be easily
2799 set from the command line.
2800
2801longdblsize (d_longdbl.U):
2802 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2803 indicates to the C program how many bytes there are in a long double,
2804 if this system supports long doubles.
2805
2806longlongsize (d_longlong.U):
2807 This variable contains the value of the LONGLONGSIZE symbol, which
2808 indicates to the C program how many bytes there are in a long long,
2809 if this system supports long long.
2810
2811longsize (intsize.U):
2812 This variable contains the value of the LONGSIZE symbol, which
2813 indicates to the C program how many bytes there are in a long.
2814
2815lp (Loc.U):
2816 This variable is defined but not used by Configure.
2817 The value is a plain '' and is not useful.
2818
2819lpr (Loc.U):
2820 This variable is defined but not used by Configure.
2821 The value is a plain '' and is not useful.
2822
2823ls (Loc.U):
5bf26616 2824 This variable is used internally by Configure to determine the
781b178c
JH
2825 full pathname (if any) of the ls program. After Configure runs,
2826 the value is reset to a plain "ls" and is not useful.
2827
2828lseeksize (lseektype.U):
2829 This variable defines lseektype to be something like off_t, long,
2830 or whatever type is used to declare lseek offset's type in the
2831 kernel (which also appears to be lseek's return type).
2832
2833lseektype (lseektype.U):
2834 This variable defines lseektype to be something like off_t, long,
2835 or whatever type is used to declare lseek offset's type in the
2836 kernel (which also appears to be lseek's return type).
2837
2838mail (Loc.U):
2839 This variable is defined but not used by Configure.
2840 The value is a plain '' and is not useful.
2841
2842mailx (Loc.U):
2843 This variable is defined but not used by Configure.
2844 The value is a plain '' and is not useful.
2845
2846make (Loc.U):
5bf26616 2847 This variable is used internally by Configure to determine the
781b178c
JH
2848 full pathname (if any) of the make program. After Configure runs,
2849 the value is reset to a plain "make" and is not useful.
2850
2851make_set_make (make.U):
2852 Some versions of 'make' set the variable MAKE. Others do not.
2853 This variable contains the string to be included in Makefile.SH
2854 so that MAKE is set if needed, and not if not needed.
2855 Possible values are:
2856 make_set_make='#' # If your make program handles this for you,
2857 make_set_make="MAKE=$make" # if it doesn't.
2858 I used a comment character so that we can distinguish a
2859 'set' value (from a previous config.sh or Configure '-D' option)
2860 from an uncomputed value.
2861
2862mallocobj (mallocsrc.U):
2863 This variable contains the name of the malloc.o that this package
2864 generates, if that malloc.o is preferred over the system malloc.
2865 Otherwise the value is null. This variable is intended for generating
2866 Makefiles. See mallocsrc.
2867
2868mallocsrc (mallocsrc.U):
2869 This variable contains the name of the malloc.c that comes with
2870 the package, if that malloc.c is preferred over the system malloc.
2871 Otherwise the value is null. This variable is intended for generating
2872 Makefiles.
2873
2874malloctype (mallocsrc.U):
2875 This variable contains the kind of ptr returned by malloc and realloc.
2876
2877man1dir (man1dir.U):
2878 This variable contains the name of the directory in which manual
2879 source pages are to be put. It is the responsibility of the
2880 Makefile.SH to get the value of this into the proper command.
2881 You must be prepared to do the ~name expansion yourself.
2882
2883man1direxp (man1dir.U):
2884 This variable is the same as the man1dir variable, but is filename
2885 expanded at configuration time, for convenient use in makefiles.
2886
2887man1ext (man1dir.U):
2888 This variable contains the extension that the manual page should
2889 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2890 See man1dir.
2891
2892man3dir (man3dir.U):
2893 This variable contains the name of the directory in which manual
2894 source pages are to be put. It is the responsibility of the
2895 Makefile.SH to get the value of this into the proper command.
2896 You must be prepared to do the ~name expansion yourself.
2897
2898man3direxp (man3dir.U):
2899 This variable is the same as the man3dir variable, but is filename
2900 expanded at configuration time, for convenient use in makefiles.
2901
2902man3ext (man3dir.U):
2903 This variable contains the extension that the manual page should
2904 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2905 See man3dir.
2906
ff935051
JH
2907Mcc (Loc.U):
2908 This variable is used internally by Configure to determine the
2909 full pathname (if any) of the Mcc program. After Configure runs,
2910 the value is reset to a plain "Mcc" and is not useful.
2911
781b178c
JH
2912mips_type (usrinc.U):
2913 This variable holds the environment type for the mips system.
2914 Possible values are "BSD 4.3" and "System V".
2915
2916mkdir (Loc.U):
5bf26616 2917 This variable is used internally by Configure to determine the
781b178c
JH
2918 full pathname (if any) of the mkdir program. After Configure runs,
2919 the value is reset to a plain "mkdir" and is not useful.
2920
fe749a9f
JH
2921mmaptype (d_mmap.U):
2922 This symbol contains the type of pointer returned by mmap()
2923 (and simultaneously the type of the first argument).
2924 It can be 'void *' or 'caddr_t'.
2925
781b178c
JH
2926modetype (modetype.U):
2927 This variable defines modetype to be something like mode_t,
2928 int, unsigned short, or whatever type is used to declare file
2929 modes for system calls.
2930
2931more (Loc.U):
5bf26616 2932 This variable is used internally by Configure to determine the
781b178c
JH
2933 full pathname (if any) of the more program. After Configure runs,
2934 the value is reset to a plain "more" and is not useful.
2935
2936multiarch (multiarch.U):
2937 This variable conditionally defines the MULTIARCH symbol
2938 which signifies the presence of multiplatform files.
2939 This is normally set by hints files.
2940
2941mv (Loc.U):
2942 This variable is defined but not used by Configure.
2943 The value is a plain '' and is not useful.
2944
2945myarchname (archname.U):
2946 This variable holds the architecture name computed by Configure in
2947 a previous run. It is not intended to be perused by any user and
2948 should never be set in a hint file.
2949
2950mydomain (myhostname.U):
2951 This variable contains the eventual value of the MYDOMAIN symbol,
2952 which is the domain of the host the program is going to run on.
2953 The domain must be appended to myhostname to form a complete host name.
2954 The dot comes with mydomain, and need not be supplied by the program.
2955
2956myhostname (myhostname.U):
2957 This variable contains the eventual value of the MYHOSTNAME symbol,
2958 which is the name of the host the program is going to run on.
2959 The domain is not kept with hostname, but must be gotten from mydomain.
2960 The dot comes with mydomain, and need not be supplied by the program.
2961
2962myuname (Oldconfig.U):
2963 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2964 pseudo variables assignments in the output are stripped, thank you. The
2965 whole thing is then lower-cased.
2966
2967n (n.U):
2968 This variable contains the '-n' flag if that is what causes the echo
2969 command to suppress newline. Otherwise it is null. Correct usage is
2970 $echo $n "prompt for a question: $c".
2971
2cc61e15
DD
2972need_va_copy (need_va_copy.U):
2973 This symbol, if defined, indicates that the system stores
2974 the variable argument list datatype, va_list, in a format
2975 that cannot be copied by simple assignment, so that some
2976 other means must be used when copying is required.
2977 As such systems vary in their provision (or non-provision)
2978 of copying mechanisms, handy.h defines a platform-
2979 independent macro, Perl_va_copy(src, dst), to do the job.
2980
781b178c
JH
2981netdb_hlen_type (netdbtype.U):
2982 This variable holds the type used for the 2nd argument to
2983 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2984 This is only useful if you have gethostbyaddr(), naturally.
2985
2986netdb_host_type (netdbtype.U):
2987 This variable holds the type used for the 1st argument to
2988 gethostbyaddr(). Usually, this is char * or void *, possibly
2989 with or without a const prefix.
2990 This is only useful if you have gethostbyaddr(), naturally.
2991
2992netdb_name_type (netdbtype.U):
2993 This variable holds the type used for the argument to
2994 gethostbyname(). Usually, this is char * or const char *.
2995 This is only useful if you have gethostbyname(), naturally.
2996
2997netdb_net_type (netdbtype.U):
2998 This variable holds the type used for the 1st argument to
2999 getnetbyaddr(). Usually, this is int or long.
3000 This is only useful if you have getnetbyaddr(), naturally.
3001
3002nm (Loc.U):
5bf26616 3003 This variable is used internally by Configure to determine the
781b178c
JH
3004 full pathname (if any) of the nm program. After Configure runs,
3005 the value is reset to a plain "nm" and is not useful.
3006
3007nm_opt (usenm.U):
3008 This variable holds the options that may be necessary for nm.
3009
3010nm_so_opt (usenm.U):
3011 This variable holds the options that may be necessary for nm
3012 to work on a shared library but that can not be used on an
3013 archive library. Currently, this is only used by Linux, where
3014 nm --dynamic is *required* to get symbols from an ELF library which
3015 has been stripped, but nm --dynamic is *fatal* on an archive library.
3016 Maybe Linux should just always set usenm=false.
3017
3018nonxs_ext (Extensions.U):
3019 This variable holds a list of all non-xs extensions included
3020 in the package. All of them will be built.
3021
3022nroff (Loc.U):
5bf26616 3023 This variable is used internally by Configure to determine the
781b178c
JH
3024 full pathname (if any) of the nroff program. After Configure runs,
3025 the value is reset to a plain "nroff" and is not useful.
3026
6b4667fc
A
3027nveformat (perlxvf.U):
3028 This variable contains the format string used for printing
3029 a Perl NV using %e-ish floating point format.
3030
6b356c8e 3031nvEUformat (perlxvf.U):
6b4667fc
A
3032 This variable contains the format string used for printing
3033 a Perl NV using %E-ish floating point format.
3034
3035nvfformat (perlxvf.U):
3036 This variable confains the format string used for printing
3037 a Perl NV using %f-ish floating point format.
3038
6b356c8e 3039nvFUformat (perlxvf.U):
6b4667fc
A
3040 This variable confains the format string used for printing
3041 a Perl NV using %F-ish floating point format.
3042
3043nvgformat (perlxvf.U):
3044 This variable contains the format string used for printing
3045 a Perl NV using %g-ish floating point format.
3046
6b356c8e 3047nvGUformat (perlxvf.U):
6b4667fc
A
3048 This variable contains the format string used for printing
3049 a Perl NV using %G-ish floating point format.
3050
a22e52b9
JH
3051nvsize (perlxv.U):
3052 This variable is the size of an NV in bytes.
3053
3054nvtype (perlxv.U):
3055 This variable contains the C type used for Perl's NV.
3056
781b178c
JH
3057o_nonblock (nblock_io.U):
3058 This variable bears the symbol value to be used during open() or fcntl()
3059 to turn on non-blocking I/O for a file descriptor. If you wish to switch
3060 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
3061 but that is only supported by some devices.
3062
3063obj_ext (Unix.U):
3064 This is an old synonym for _o.
3065
3066old_pthread_create_joinable (d_pthrattrj.U):
3067 This variable defines the constant to use for creating joinable
3068 (aka undetached) pthreads. Unused if pthread.h defines
3069 PTHREAD_CREATE_JOINABLE. If used, possible values are
3070 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
3071
3072optimize (ccflags.U):
3073 This variable contains any optimizer/debugger flag that should be used.
3074 It is up to the Makefile to use it.
3075
3076orderlib (orderlib.U):
3077 This variable is "true" if the components of libraries must be ordered
3078 (with `lorder $* | tsort`) before placing them in an archive. Set to
3079 "false" if ranlib or ar can generate random libraries.
3080
3081osname (Oldconfig.U):
3082 This variable contains the operating system name (e.g. sunos,
3083 solaris, hpux, etc.). It can be useful later on for setting
3084 defaults. Any spaces are replaced with underscores. It is set
3085 to a null string if we can't figure it out.
3086
3087osvers (Oldconfig.U):
3088 This variable contains the operating system version (e.g.
3089 4.1.3, 5.2, etc.). It is primarily used for helping select
3090 an appropriate hints file, but might be useful elsewhere for
3091 setting defaults. It is set to '' if we can't figure it out.
3092 We try to be flexible about how much of the version number
3093 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3094 same for this package, hints files might just be os_4.0 or
3095 os_4.1, etc., not keeping separate files for each little release.
3096
3b777bb4
GS
3097otherlibdirs (otherlibdirs.U):
3098 This variable contains a colon-separated set of paths for the perl
3099 binary to search for additional library files or modules.
3100 These directories will be tacked to the end of @INC.
3101 Perl will automatically search below each path for version-
3102 and architecture-specific directories. See inc_version_list
3103 for more details.
3104 A value of ' ' means 'none' and is used to preserve this value
3105 for the next run through Configure.
3106
781b178c
JH
3107package (package.U):
3108 This variable contains the name of the package being constructed.
3109 It is primarily intended for the use of later Configure units.
3110
3111pager (pager.U):
3112 This variable contains the name of the preferred pager on the system.
3113 Usual values are (the full pathnames of) more, less, pg, or cat.
3114
3115passcat (nis.U):
3116 This variable contains a command that produces the text of the
3117 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3118 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3119 On some systems, such as os390, there may be no equivalent
3120 command, in which case this variable is unset.
781b178c
JH
3121
3122patchlevel (patchlevel.U):
3123 The patchlevel level of this package.
3124 The value of patchlevel comes from the patchlevel.h file.
ff935051 3125 In a version number such as 5.6.1, this is the "6".
c890dc6c 3126 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3127
3128path_sep (Unix.U):
3129 This is an old synonym for p_ in Head.U, the character
3130 used to separate elements in the command shell search PATH.
3131
c890dc6c
JH
3132perl5 (perl5.U):
3133 This variable contains the full path (if any) to a previously
3134 installed perl5.005 or later suitable for running the script
3135 to determine inc_version_list.
3136
781b178c 3137perl (Loc.U):
c890dc6c
JH
3138 This variable is defined but not used by Configure.
3139 The value is a plain '' and is not useful.
781b178c 3140
a6d26a0d
JH
3141perl_patchlevel (patchlevel.U):
3142 This is the Perl patch level, a numeric change identifier,
3143 as defined by whichever source code maintenance system
3144 is used to maintain the patches; currently Perforce.
3145 It does not correlate with the Perl version numbers or
3146 the maintenance versus development dichotomy except
3147 by also being increasing.
3148
ff935051
JH
3149PERL_REVISION (Oldsyms.U):
3150 In a Perl version number such as 5.6.2, this is the 5.
3151 This value is manually set in patchlevel.h
3152
3153PERL_SUBVERSION (Oldsyms.U):
3154 In a Perl version number such as 5.6.2, this is the 2.
3155 Values greater than 50 represent potentially unstable
3156 development subversions.
3157 This value is manually set in patchlevel.h
3158
3159PERL_VERSION (Oldsyms.U):
3160 In a Perl version number such as 5.6.2, this is the 6.
3161 This value is manually set in patchlevel.h
3162
781b178c
JH
3163perladmin (perladmin.U):
3164 Electronic mail address of the perl5 administrator.
3165
b7a73309
JH
3166perllibs (End.U):
3167 The list of libraries needed by Perl only (any libraries needed
3168 by extensions only will by dropped, if using dynamic loading).
3169
781b178c
JH
3170perlpath (perlpath.U):
3171 This variable contains the eventual value of the PERLPATH symbol,
3172 which contains the name of the perl interpreter to be used in
3173 shell scripts and in the "eval 'exec'" idiom.
3174
3175pg (Loc.U):
5bf26616 3176 This variable is used internally by Configure to determine the
781b178c
JH
3177 full pathname (if any) of the pg program. After Configure runs,
3178 the value is reset to a plain "pg" and is not useful.
3179
3180phostname (myhostname.U):
3181 This variable contains the eventual value of the PHOSTNAME symbol,
3182 which is a command that can be fed to popen() to get the host name.
3183 The program should probably not presume that the domain is or isn't
3184 there already.
3185
3186pidtype (pidtype.U):
3187 This variable defines PIDTYPE to be something like pid_t, int,
3188 ushort, or whatever type is used to declare process ids in the kernel.
3189
3190plibpth (libpth.U):
3191 Holds the private path used by Configure to find out the libraries.
3192 Its value is prepend to libpth. This variable takes care of special
3193 machines, like the mips. Usually, it should be empty.
3194
fe749a9f
JH
3195pm_apiversion (xs_apiversion.U):
3196 This variable contains the version of the oldest perl
3197 compatible with the present perl. (That is, pure perl modules
3198 written for $pm_apiversion will still work for the current
3199 version). perl.c:incpush() and lib/lib.pm will automatically
3200 search in $sitelib for older directories across major versions
3201 back to pm_apiversion. This is only useful if you have a perl
3202 library directory tree structured like the default one. The
3203 versioned site_perl library was introduced in 5.005, so that's
3204 the default setting for this variable. It's hard to imagine
3205 it changing before Perl6. It is included here for symmetry
3206 with xs_apiveprsion -- the searching algorithms will
3207 (presumably) be similar.
3208 See the INSTALL file for how this works.
3209
781b178c
JH
3210pmake (Loc.U):
3211 This variable is defined but not used by Configure.
3212 The value is a plain '' and is not useful.
3213
3214pr (Loc.U):
3215 This variable is defined but not used by Configure.
3216 The value is a plain '' and is not useful.
3217
3218prefix (prefix.U):
3219 This variable holds the name of the directory below which the
3220 user will install the package. Usually, this is /usr/local, and
3221 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3222 man pages in /usr/local/man, etc. It is only used to set defaults
3223 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3224
3225prefixexp (prefix.U):
3226 This variable holds the full absolute path of the directory below
3227 which the user will install the package. Derived from prefix.
3228
3229privlib (privlib.U):
3230 This variable contains the eventual value of the PRIVLIB symbol,
3231 which is the name of the private library for this package. It may
3232 have a ~ on the front. It is up to the makefile to eventually create
3233 this directory while performing installation (with ~ substitution).
3234
3235privlibexp (privlib.U):
3236 This variable is the ~name expanded version of privlib, so that you
3237 may use it directly in Makefiles or shell scripts.
3238
428dc699
JH
3239procselfexe (d_procselfexe.U):
3240 If d_procselfexe is defined, $procselfexe is the filename
3241 of the symbolic link pointing to the absolute pathname of
3242 the executing program.
3243
781b178c
JH
3244prototype (prototype.U):
3245 This variable holds the eventual value of CAN_PROTOTYPE, which
3246 indicates the C compiler can handle funciton prototypes.
3247
3248ptrsize (ptrsize.U):
3249 This variable contains the value of the PTRSIZE symbol, which
3250 indicates to the C program how many bytes there are in a pointer.
3251
e0a10278 3252quadkind (quadtype.U):
0befd8de
JH
3253 This variable, if defined, encodes the type of a quad:
3254 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3255
3256quadtype (quadtype.U):
3257 This variable defines Quad_t to be something like long, int,
3258 long long, int64_t, or whatever type is used for 64-bit integers.
3259
781b178c
JH
3260randbits (randfunc.U):
3261 Indicates how many bits are produced by the function used to
3262 generate normalized random numbers.
3263
3264randfunc (randfunc.U):
3265 Indicates the name of the random number function to use.
3266 Values include drand48, random, and rand. In C programs,
3267 the 'Drand01' macro is defined to generate uniformly distributed
3268 random numbers over the range [0., 1.[ (see drand01 and nrand).
3269
3270randseedtype (randfunc.U):
3271 Indicates the type of the argument of the seedfunc.
3272
3273ranlib (orderlib.U):
3274 This variable is set to the pathname of the ranlib program, if it is
3275 needed to generate random libraries. Set to ":" if ar can generate
3276 random libraries or if random libraries are not supported
3277
3278rd_nodata (nblock_io.U):
3279 This variable holds the return code from read() when no data is
3280 present. It should be -1, but some systems return 0 when O_NDELAY is
3281 used, which is a shame because you cannot make the difference between
209e5c0a 3282 no data and an EOF.. Sigh!
781b178c 3283
c890dc6c
JH
3284revision (patchlevel.U):
3285 The value of revision comes from the patchlevel.h file.
3286 In a version number such as 5.6.1, this is the "5".
3287 In patchlevel.h, this is referred to as "PERL_REVISION".
3288
781b178c 3289rm (Loc.U):
5bf26616 3290 This variable is used internally by Configure to determine the
781b178c
JH
3291 full pathname (if any) of the rm program. After Configure runs,
3292 the value is reset to a plain "rm" and is not useful.
3293
3294rmail (Loc.U):
3295 This variable is defined but not used by Configure.
3296 The value is a plain '' and is not useful.
3297
5440bc8e
JH
3298run (Cross.U):
3299 This variable contains the command used by Configure
3300 to copy and execute a cross-compiled executable in the
3301 target host. Useful and available only during Perl build.
3302 Empty string '' if not cross-compiling.
3303
781b178c
JH
3304runnm (usenm.U):
3305 This variable contains 'true' or 'false' depending whether the
3306 nm extraction should be performed or not, according to the value
3307 of usenm and the flags on the Configure command line.
3308
3309sched_yield (d_pthread_y.U):
3310 This variable defines the way to yield the execution
3311 of the current thread.
3312
3313scriptdir (scriptdir.U):
3314 This variable holds the name of the directory in which the user wants
3315 to put publicly scripts for the package in question. It is either
3316 the same directory as for binaries, or a special one that can be
3317 mounted across different architectures, like /usr/share. Programs
3318 must be prepared to deal with ~name expansion.
3319
3320scriptdirexp (scriptdir.U):
3321 This variable is the same as scriptdir, but is filename expanded
3322 at configuration time, for programs not wanting to bother with it.
3323
3324sed (Loc.U):
5bf26616 3325 This variable is used internally by Configure to determine the
781b178c
JH
3326 full pathname (if any) of the sed program. After Configure runs,
3327 the value is reset to a plain "sed" and is not useful.
3328
3329seedfunc (randfunc.U):
3330 Indicates the random number generating seed function.
3331 Values include srand48, srandom, and srand.
3332
3333selectminbits (selectminbits.U):
3334 This variable holds the minimum number of bits operated by select.
3335 That is, if you do select(n, ...), how many bits at least will be
3336 cleared in the masks if some activity is detected. Usually this
3337 is either n or 32*ceil(n/32), especially many little-endians do
3338 the latter. This is only useful if you have select(), naturally.
3339
3340selecttype (selecttype.U):
3341 This variable holds the type used for the 2nd, 3rd, and 4th
3342 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3343 is defined, and 'int *' otherwise. This is only useful if you
3344 have select(), naturally.
3345
3346sendmail (Loc.U):
ff935051
JH
3347 This variable is defined but not used by Configure.
3348 The value is a plain '' and is not useful.
781b178c
JH
3349
3350sh (sh.U):
3351 This variable contains the full pathname of the shell used
3352 on this system to execute Bourne shell scripts. Usually, this will be
3353 /bin/sh, though it's possible that some systems will have /bin/ksh,
3354 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3355 D:/bin/sh.exe.
3356 This unit comes before Options.U, so you can't set sh with a '-D'
3357 option, though you can override this (and startsh)
3358 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3359
3360shar (Loc.U):
3361 This variable is defined but not used by Configure.
3362 The value is a plain '' and is not useful.
3363
3364sharpbang (spitshell.U):
3365 This variable contains the string #! if this system supports that
3366 construct.
3367
3368shmattype (d_shmat.U):
3369 This symbol contains the type of pointer returned by shmat().
3370 It can be 'void *' or 'char *'.
3371
3372shortsize (intsize.U):
3373 This variable contains the value of the SHORTSIZE symbol which
3374 indicates to the C program how many bytes there are in a short.
3375
3376shrpenv (libperl.U):
3377 If the user builds a shared libperl.so, then we need to tell the
3378 'perl' executable where it will be able to find the installed libperl.so.
3379 One way to do this on some systems is to set the environment variable
3380 LD_RUN_PATH to the directory that will be the final location of the
3381 shared libperl.so. The makefile can use this with something like
3382 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3383 Typical values are
3384 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3385 or
3386 shrpenv=''
3387 See the main perl Makefile.SH for actual working usage.
3388 Alternatively, we might be able to use a command line option such
c68a00c0 3389 as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
781b178c
JH
3390 $archlibexp/CORE (Linux).
3391
3392shsharp (spitshell.U):
3393 This variable tells further Configure units whether your sh can
3394 handle # comments.
3395
3396sig_count (sig_name.U):
3397 This variable holds a number larger than the largest valid
3398 signal number. This is usually the same as the NSIG macro.
3399
3400sig_name (sig_name.U):
3401 This variable holds the signal names, space separated. The leading
3402 SIG in signal name is removed. A ZERO is prepended to the
3403 list. This is currently not used.
3404
3405sig_name_init (sig_name.U):
3406 This variable holds the signal names, enclosed in double quotes and
3407 separated by commas, suitable for use in the SIG_NAME definition
3408 below. A "ZERO" is prepended to the list, and the list is
3409 terminated with a plain 0. The leading SIG in signal names
3410 is removed. See sig_num.
3411
3412sig_num (sig_name.U):
3413 This variable holds the signal numbers, space separated. A ZERO is
3414 prepended to the list (corresponding to the fake SIGZERO), and
3415 the list is terminated with a 0. Those numbers correspond to
3416 the value of the signal listed in the same place within the
3417 sig_name list.
3418
3419sig_num_init (sig_name.U):
3420 This variable holds the signal numbers, enclosed in double quotes and
3421 separated by commas, suitable for use in the SIG_NUM definition
3422 below. A "ZERO" is prepended to the list, and the list is
3423 terminated with a plain 0.
3424
76d3c696
JH
3425sig_size (sig_name.U):
3426 This variable contains the number of elements of the sig_name
8966e0c4 3427 and sig_num arrays, excluding the final NULL entry.
76d3c696 3428
781b178c
JH
3429signal_t (d_voidsig.U):
3430 This variable holds the type of the signal handler (void or int).
3431
3432sitearch (sitearch.U):
3433 This variable contains the eventual value of the SITEARCH symbol,
3434 which is the name of the private library for this package. It may
3435 have a ~ on the front. It is up to the makefile to eventually create
3436 this directory while performing installation (with ~ substitution).
f868067f
JH
3437 The standard distribution will put nothing in this directory.
3438 After perl has been installed, users may install their own local
3439 architecture-dependent modules in this directory with
3440 MakeMaker Makefile.PL
3441 or equivalent. See INSTALL for details.
781b178c
JH
3442
3443sitearchexp (sitearch.U):
3444 This variable is the ~name expanded version of sitearch, so that you
3445 may use it directly in Makefiles or shell scripts.
3446
0617aed7
JH
3447sitebin (sitebin.U):
3448 This variable holds the name of the directory in which the user wants
3449 to put add-on publicly executable files for the package in question. It
3450 is most often a local directory such as /usr/local/bin. Programs using
3451 this variable must be prepared to deal with ~name substitution.
f868067f
JH
3452 The standard distribution will put nothing in this directory.
3453 After perl has been installed, users may install their own local
3454 executables in this directory with
3455 MakeMaker Makefile.PL
3456 or equivalent. See INSTALL for details.
0617aed7
JH
3457
3458sitebinexp (sitebin.U):
3459 This is the same as the sitebin variable, but is filename expanded at
3460 configuration time, for use in your makefiles.
3461
781b178c
JH
3462sitelib (sitelib.U):
3463 This variable contains the eventual value of the SITELIB symbol,
3464 which is the name of the private library for this package. It may
3465 have a ~ on the front. It is up to the makefile to eventually create
3466 this directory while performing installation (with ~ substitution).
f868067f
JH
3467 The standard distribution will put nothing in this directory.
3468 After perl has been installed, users may install their own local
3469 architecture-independent modules in this directory with
3470 MakeMaker Makefile.PL
3471 or equivalent. See INSTALL for details.
781b178c 3472
526fdc24
MS
3473sitelib_stem (sitelib.U):
3474 This variable is $sitelibexp with any trailing version-specific component
3475 removed. The elements in inc_version_list (inc_version_list.U) can
3476 be tacked onto this variable to generate a list of directories to search.
3477
781b178c
JH
3478sitelibexp (sitelib.U):
3479 This variable is the ~name expanded version of sitelib, so that you
3480 may use it directly in Makefiles or shell scripts.
3481
3482siteprefix (siteprefix.U):
3483 This variable holds the full absolute path of the directory below
3484 which the user will install add-on packages.
f868067f 3485 See INSTALL for usage and examples.
781b178c
JH
3486
3487siteprefixexp (siteprefix.U):
3488 This variable holds the full absolute path of the directory below
3489 which the user will install add-on packages. Derived from siteprefix.
3490
a13ea748
JH
3491sizesize (sizesize.U):
3492 This variable contains the size of a sizetype in bytes.
3493
781b178c
JH
3494sizetype (sizetype.U):
3495 This variable defines sizetype to be something like size_t,
3496 unsigned long, or whatever type is used to declare length
3497 parameters for string functions.
3498
3499sleep (Loc.U):
3500 This variable is defined but not used by Configure.
3501 The value is a plain '' and is not useful.
3502
3503smail (Loc.U):
3504 This variable is defined but not used by Configure.
3505 The value is a plain '' and is not useful.
3506
781b178c
JH
3507so (so.U):
3508 This variable holds the extension used to identify shared libraries
3509 (also known as shared objects) on the system. Usually set to 'so'.
3510
3511sockethdr (d_socket.U):
3512 This variable has any cpp '-I' flags needed for socket support.
3513
3514socketlib (d_socket.U):
3515 This variable has the names of any libraries needed for socket support.
3516
c890dc6c
JH
3517socksizetype (socksizetype.U):
3518 This variable holds the type used for the size argument
3519 for various socket calls like accept. Usual values include
3520 socklen_t, size_t, and int.
3521
781b178c 3522sort (Loc.U):
5bf26616 3523 This variable is used internally by Configure to determine the
781b178c
JH
3524 full pathname (if any) of the sort program. After Configure runs,
3525 the value is reset to a plain "sort" and is not useful.
3526
3527spackage (package.U):
3528 This variable contains the name of the package being constructed,
3529 with the first letter uppercased, i.e. suitable for starting
3530 sentences.
3531
3532spitshell (spitshell.U):
3533 This variable contains the command necessary to spit out a runnable
3534 shell on this system. It is either cat or a grep '-v' for # comments.
3535
ff935051
JH
3536sPRId64 (quadfio.U):
3537 This variable, if defined, contains the string used by stdio to
3538 format 64-bit decimal numbers (format 'd') for output.
3539
3540sPRIeldbl (longdblfio.U):
3541 This variable, if defined, contains the string used by stdio to
3542 format long doubles (format 'e') for output.
3543
6b356c8e 3544sPRIEUldbl (longdblfio.U):
ff935051
JH
3545 This variable, if defined, contains the string used by stdio to
3546 format long doubles (format 'E') for output.
6b356c8e
JH
3547 The 'U' in the name is to separate this from sPRIeldbl so that even
3548 case-blind systems can see the difference.
ff935051
JH
3549
3550sPRIfldbl (longdblfio.U):
3551 This variable, if defined, contains the string used by stdio to
3552 format long doubles (format 'f') for output.
3553
6b356c8e 3554sPRIFUldbl (longdblfio.U):
ff935051
JH
3555 This variable, if defined, contains the string used by stdio to
3556 format long doubles (format 'F') for output.
6b356c8e
JH
3557 The 'U' in the name is to separate this from sPRIfldbl so that even
3558 case-blind systems can see the difference.
ff935051
JH
3559
3560sPRIgldbl (longdblfio.U):
3561 This variable, if defined, contains the string used by stdio to
3562 format long doubles (format 'g') for output.
3563
6b356c8e 3564sPRIGUldbl (longdblfio.U):
ff935051
JH
3565 This variable, if defined, contains the string used by stdio to
3566 format long doubles (format 'G') for output.
6b356c8e
JH
3567 The 'U' in the name is to separate this from sPRIgldbl so that even
3568 case-blind systems can see the difference.
ff935051
JH
3569
3570sPRIi64 (quadfio.U):
3571 This variable, if defined, contains the string used by stdio to
3572 format 64-bit decimal numbers (format 'i') for output.
3573
3574sPRIo64 (quadfio.U):
3575 This variable, if defined, contains the string used by stdio to
3576 format 64-bit octal numbers (format 'o') for output.
3577
3578sPRIu64 (quadfio.U):
3579 This variable, if defined, contains the string used by stdio to
3580 format 64-bit unsigned decimal numbers (format 'u') for output.
3581
3582sPRIx64 (quadfio.U):
3583 This variable, if defined, contains the string used by stdio to
3584 format 64-bit hexadecimal numbers (format 'x') for output.
3585
6b356c8e 3586sPRIXU64 (quadfio.U):
ff935051
JH
3587 This variable, if defined, contains the string used by stdio to
3588 format 64-bit hExADECimAl numbers (format 'X') for output.
6b356c8e
JH
3589 The 'U' in the name is to separate this from sPRIx64 so that even
3590 case-blind systems can see the difference.
ff935051 3591
781b178c
JH
3592src (src.U):
3593 This variable holds the path to the package source. It is up to
3594 the Makefile to use this variable and set VPATH accordingly to
3595 find the sources remotely.
3596
6b356c8e
JH
3597sSCNfldbl (longdblfio.U):
3598 This variable, if defined, contains the string used by stdio to
3599 format long doubles (format 'f') for input.
3600
781b178c
JH
3601ssizetype (ssizetype.U):
3602 This variable defines ssizetype to be something like ssize_t,
3603 long or int. It is used by functions that return a count
3604 of bytes or an error condition. It must be a signed type.
3605 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3606
3607startperl (startperl.U):
3608 This variable contains the string to put on the front of a perl
3609 script to make sure (hopefully) that it runs with perl and not some
3610 shell. Of course, that leading line must be followed by the classical
3611 perl idiom:
3612 eval 'exec perl -S $0 ${1+"$@"}'
3613 if $running_under_some_shell;
3614 to guarantee perl startup should the shell execute the script. Note
3615 that this magic incatation is not understood by csh.
3616
3617startsh (startsh.U):
3618 This variable contains the string to put on the front of a shell
3619 script to make sure (hopefully) that it runs with sh and not some
3620 other shell.
3621
3622static_ext (Extensions.U):
3623 This variable holds a list of XS extension files we want to
3624 link statically into the package. It is used by Makefile.
3625
3626stdchar (stdchar.U):
3627 This variable conditionally defines STDCHAR to be the type of char
3628 used in stdio.h. It has the values "unsigned char" or "char".
3629
3630stdio_base (d_stdstdio.U):
3631 This variable defines how, given a FILE pointer, fp, to access the
3632 _base field (or equivalent) of stdio.h's FILE structure. This will
3633 be used to define the macro FILE_base(fp).
3634
3635stdio_bufsiz (d_stdstdio.U):
3636 This variable defines how, given a FILE pointer, fp, to determine
3637 the number of bytes store in the I/O buffer pointer to by the
3638 _base field (or equivalent) of stdio.h's FILE structure. This will
3639 be used to define the macro FILE_bufsiz(fp).
3640
3641stdio_cnt (d_stdstdio.U):
3642 This variable defines how, given a FILE pointer, fp, to access the
3643 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3644 be used to define the macro FILE_cnt(fp).
3645
3646stdio_filbuf (d_stdstdio.U):
3647 This variable defines how, given a FILE pointer, fp, to tell
022735b4 3648 stdio to refill its internal buffers (?). This will
781b178c
JH
3649 be used to define the macro FILE_filbuf(fp).
3650
3651stdio_ptr (d_stdstdio.U):
3652 This variable defines how, given a FILE pointer, fp, to access the
3653 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3654 be used to define the macro FILE_ptr(fp).
3655
3656stdio_stream_array (stdio_streams.U):
3657 This variable tells the name of the array holding the stdio streams.
3658 Usual values include _iob, __iob, and __sF.
3659
3660strings (i_string.U):
3661 This variable holds the full path of the string header that will be
3662 used. Typically /usr/include/string.h or /usr/include/strings.h.
3663
3664submit (Loc.U):
3665 This variable is defined but not used by Configure.
3666 The value is a plain '' and is not useful.
3667
3668subversion (patchlevel.U):
3669 The subversion level of this package.
3670 The value of subversion comes from the patchlevel.h file.
ff935051 3671 In a version number such as 5.6.1, this is the "1".
c890dc6c 3672 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
781b178c
JH
3673 This is unique to perl.
3674
3675sysman (sysman.U):
3676 This variable holds the place where the manual is located on this
3677 system. It is not the place where the user wants to put his manual
3678 pages. Rather it is the place where Configure may look to find manual
3679 for unix commands (section 1 of the manual usually). See mansrc.
3680
3681tail (Loc.U):
3682 This variable is defined but not used by Configure.
3683 The value is a plain '' and is not useful.
3684
3685tar (Loc.U):
3686 This variable is defined but not used by Configure.
3687 The value is a plain '' and is not useful.
3688
5440bc8e
JH
3689targetarch (Cross.U):
3690 If cross-compiling, this variable contains the target architecture.
3691 If not, this will be empty.
3692
781b178c
JH
3693tbl (Loc.U):
3694 This variable is defined but not used by Configure.
3695 The value is a plain '' and is not useful.
3696
3697tee (Loc.U):
3698 This variable is defined but not used by Configure.
3699 The value is a plain '' and is not useful.
3700
3701test (Loc.U):
5bf26616 3702 This variable is used internally by Configure to determine the
781b178c
JH
3703 full pathname (if any) of the test program. After Configure runs,
3704 the value is reset to a plain "test" and is not useful.
3705
3706timeincl (i_time.U):
3707 This variable holds the full path of the included time header(s).
3708
3709timetype (d_time.U):
3710 This variable holds the type returned by time(). It can be long,
3711 or time_t on BSD sites (in which case <sys/types.h> should be
3712 included). Anyway, the type Time_t should be used.
3713
5440bc8e
JH
3714to (Cross.U):
3715 This variable contains the command used by Configure
3716 to copy to from the target host. Useful and available
3717 only during Perl build.
3718 The string ':' if not cross-compiling.
3719
781b178c 3720touch (Loc.U):
5bf26616 3721 This variable is used internally by Configure to determine the
781b178c
JH
3722 full pathname (if any) of the touch program. After Configure runs,
3723 the value is reset to a plain "touch" and is not useful.
3724
3725tr (Loc.U):
5bf26616 3726 This variable is used internally by Configure to determine the
781b178c
JH
3727 full pathname (if any) of the tr program. After Configure runs,
3728 the value is reset to a plain "tr" and is not useful.
3729
3730trnl (trnl.U):
3731 This variable contains the value to be passed to the tr(1)
3732 command to transliterate a newline. Typical values are
3733 '\012' and '\n'. This is needed for EBCDIC systems where
3734 newline is not necessarily '\012'.
3735
3736troff (Loc.U):
3737 This variable is defined but not used by Configure.
3738 The value is a plain '' and is not useful.
3739
a22e52b9
JH
3740u16size (perlxv.U):
3741 This variable is the size of an U16 in bytes.
3742
3743u16type (perlxv.U):
3744 This variable contains the C type used for Perl's U16.
3745
3746u32size (perlxv.U):
3747 This variable is the size of an U32 in bytes.
3748
3749u32type (perlxv.U):
3750 This variable contains the C type used for Perl's U32.
3751
3752u64size (perlxv.U):
3753 This variable is the size of an U64 in bytes.
3754
3755u64type (perlxv.U):
3756 This variable contains the C type used for Perl's U64.
3757
3758u8size (perlxv.U):
3759 This variable is the size of an U8 in bytes.
3760
3761u8type (perlxv.U):
3762 This variable contains the C type used for Perl's U8.
3763
3764uidformat (uidf.U):
3765 This variable contains the format string used for printing a Uid_t.
3766
2d228ff3
JH
3767uidsign (uidsign.U):
3768 This variable contains the signedness of a uidtype.
3769 1 for unsigned, -1 for signed.
3770
785fb66b
JH
3771uidsize (uidsize.U):
3772 This variable contains the size of a uidtype in bytes.
3773
781b178c
JH
3774uidtype (uidtype.U):
3775 This variable defines Uid_t to be something like uid_t, int,
3776 ushort, or whatever type is used to declare user ids in the kernel.
3777
3778uname (Loc.U):
5bf26616 3779 This variable is used internally by Configure to determine the
781b178c
JH
3780 full pathname (if any) of the uname program. After Configure runs,
3781 the value is reset to a plain "uname" and is not useful.
3782
3783uniq (Loc.U):
5bf26616 3784 This variable is used internally by Configure to determine the
781b178c
JH
3785 full pathname (if any) of the uniq program. After Configure runs,
3786 the value is reset to a plain "uniq" and is not useful.
3787
0befd8de
JH
3788uquadtype (quadtype.U):
3789 This variable defines Uquad_t to be something like unsigned long,
3790 unsigned int, unsigned long long, uint64_t, or whatever type is
3791 used for 64-bit integers.
3792
aaacdc8b
GS
3793use5005threads (usethreads.U):
3794 This variable conditionally defines the USE_5005THREADS symbol,
3795 and indicates that Perl should be built to use the 5.005-based
3796 threading implementation.
3797
10cc9d2a
JH
3798use64bitall (use64bits.U):
3799 This variable conditionally defines the USE_64_BIT_ALL symbol,
3800 and indicates that 64-bit integer types should be used
3801 when available. The maximal possible
3802 64-bitness is employed: LP64 or ILP64, meaning that you will
3803 be able to use more than 2 gigabytes of memory. This mode is
3804 even more binary incompatible than USE_64_BIT_INT. You may not
3805 be able to run the resulting executable in a 32-bit CPU at all or
3806 you may need at least to reboot your OS to 64-bit mode.
3807
3808use64bitint (use64bits.U):
3809 This variable conditionally defines the USE_64_BIT_INT symbol,
aaacdc8b 3810 and indicates that 64-bit integer types should be used
c890dc6c
JH
3811 when available. The minimal possible 64-bitness
3812 is employed, just enough to get 64-bit integers into Perl.
3813 This may mean using for example "long longs", while your memory
3814 may still be limited to 2 gigabytes.
781b178c 3815
5440bc8e
JH
3816usecrosscompile (Cross.U):
3817 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3818 and indicates that Perl has been cross-compiled.
3819
781b178c 3820usedl (dlsrc.U):
ff935051 3821 This variable indicates if the system supports dynamic
781b178c
JH
3822 loading of some sort. See also dlsrc and dlobj.
3823
aaacdc8b
GS
3824useithreads (usethreads.U):
3825 This variable conditionally defines the USE_ITHREADS symbol,
3826 and indicates that Perl should be built to use the interpreter-based
3827 threading implementation.
3828
5bf26616 3829uselargefiles (uselfs.U):
1baac590
JH
3830 This variable conditionally defines the USE_LARGE_FILES symbol,
3831 and indicates that large file interfaces should be used when
c890dc6c 3832 available.
1baac590 3833
ca24dfc6
LV
3834uselongdouble (uselongdbl.U):
3835 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3836 and indicates that long doubles should be used when available.
3837
1baac590
JH
3838usemorebits (usemorebits.U):
3839 This variable conditionally defines the USE_MORE_BITS symbol,
3840 and indicates that explicit 64-bit interfaces and long doubles
3841 should be used when available.
3842
781b178c
JH
3843usemultiplicity (usemultiplicity.U):
3844 This variable conditionally defines the MULTIPLICITY symbol,
3845 and indicates that Perl should be built to use multiplicity.
3846
3847usemymalloc (mallocsrc.U):
3848 This variable contains y if the malloc that comes with this package
3849 is desired over the system's version of malloc. People often include
3850 special versions of malloc for effiency, but such versions are often
3851 less portable. See also mallocsrc and mallocobj.
3852 If this is 'y', then -lmalloc is removed from $libs.
3853
3854usenm (usenm.U):
3855 This variable contains 'true' or 'false' depending whether the
3856 nm extraction is wanted or not.
3857
3858useopcode (Extensions.U):
3859 This variable holds either 'true' or 'false' to indicate
3860 whether the Opcode extension should be used. The sole
3861 use for this currently is to allow an easy mechanism
3862 for users to skip the Opcode extension from the Configure
3863 command line.
3864
3865useperlio (useperlio.U):
3866 This variable conditionally defines the USE_PERLIO symbol,
3867 and indicates that the PerlIO abstraction should be
3868 used throughout.
3869
3870useposix (Extensions.U):
3871 This variable holds either 'true' or 'false' to indicate
3872 whether the POSIX extension should be used. The sole
3873 use for this currently is to allow an easy mechanism
3874 for hints files to indicate that POSIX will not compile
3875 on a particular system.
3876
9514c62b
JH
3877usereentrant (usethreads.U):
3878 This variable conditionally defines the USE_REENTRANT_API symbol,
3879 which indicates that the thread code may try to use the various
3880 _r versions of library functions. This is only potentially
3881 meaningful if usethreads is set and is very experimental, it is
3882 not even prompted for.
3883
781b178c
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3884usesfio (d_sfio.U):
3885 This variable is set to true when the user agrees to use sfio.
3886 It is set to false when sfio is not available or when the user
3887 explicitely requests not to use sfio. It is here primarily so
3888 that command-line settings can override the auto-detection of
3889 d_sfio without running into a "WHOA THERE".
3890
3891useshrplib (libperl.U):
3892 This variable is set to 'yes' if the user wishes
3893 to build a shared libperl, and 'no' otherwise.
3894
3895usesocks (usesocks.U):
3896 This variable conditionally defines the USE_SOCKS symbol,
3897 and indicates that Perl should be built to use SOCKS.
3898
3899usethreads (usethreads.U):
b99a9337 3900 This variable conditionally defines the USE_THREADS symbol,
781b178c
JH
3901 and indicates that Perl should be built to use threads.
3902
9f50e519
NA
3903usevendorprefix (vendorprefix.U):
3904 This variable tells whether the vendorprefix
3905 and consequently other vendor* paths are in use.
3906
781b178c
JH
3907usevfork (d_vfork.U):
3908 This variable is set to true when the user accepts to use vfork.
3909 It is set to false when no vfork is available or when the user
3910 explicitely requests not to use vfork.
3911
3912usrinc (usrinc.U):
3913 This variable holds the path of the include files, which is
3914 usually /usr/include. It is mainly used by other Configure units.
3915
3916uuname (Loc.U):
3917 This variable is defined but not used by Configure.
3918 The value is a plain '' and is not useful.
3919
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JH
3920uvoformat (perlxvf.U):
3921 This variable contains the format string used for printing
3922 a Perl UV as an unsigned octal integer.
3923
3924uvsize (perlxv.U):
3925 This variable is the size of a UV in bytes.
3926
3927uvtype (perlxv.U):
3928 This variable contains the C type used for Perl's UV.
3929
3930uvuformat (perlxvf.U):
3931 This variable contains the format string used for printing
3932 a Perl UV as an unsigned decimal integer.
3933
3934uvxformat (perlxvf.U):
3935 This variable contains the format string used for printing
6b4667fc
A
3936 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3937
6b356c8e 3938uvXUformat (perlxvf.U):
6b4667fc
A
3939 This variable contains the format string used for printing
3940 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
a22e52b9 3941
526fdc24
MS
3942vendorarch (vendorarch.U):
3943 This variable contains the value of the PERL_VENDORARCH symbol.
3944 It may have a ~ on the front.
3945 The standard distribution will put nothing in this directory.
3946 Vendors who distribute perl may wish to place their own
3947 architecture-dependent modules and extensions in this directory with
3948 MakeMaker Makefile.PL INSTALLDIRS=vendor
3949 or equivalent. See INSTALL for details.
3950
3951vendorarchexp (vendorarch.U):
3952 This variable is the ~name expanded version of vendorarch, so that you
3953 may use it directly in Makefiles or shell scripts.
3954
0617aed7 3955vendorbin (vendorbin.U):
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JH
3956 This variable contains the eventual value of the VENDORBIN symbol.
3957 It may have a ~ on the front.
3958 The standard distribution will put nothing in this directory.
3959 Vendors who distribute perl may wish to place additional
3960 binaries in this directory with
3961 MakeMaker Makefile.PL INSTALLDIRS=vendor
3962 or equivalent. See INSTALL for details.
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JH
3963
3964vendorbinexp (vendorbin.U):
3965 This variable is the ~name expanded version of vendorbin, so that you
3966 may use it directly in Makefiles or shell scripts.
3967
a3635516
JH
3968vendorlib (vendorlib.U):
3969 This variable contains the eventual value of the VENDORLIB symbol,
f868067f
JH
3970 which is the name of the private library for this package.
3971 The standard distribution will put nothing in this directory.
3972 Vendors who distribute perl may wish to place their own
3973 modules in this directory with
3974 MakeMaker Makefile.PL INSTALLDIRS=vendor
3975 or equivalent. See INSTALL for details.
a3635516 3976
526fdc24
MS
3977vendorlib_stem (vendorlib.U):
3978 This variable is $vendorlibexp with any trailing version-specific component
3979 removed. The elements in inc_version_list (inc_version_list.U) can
3980 be tacked onto this variable to generate a list of directories to search.
3981
a3635516
JH
3982vendorlibexp (vendorlib.U):
3983 This variable is the ~name expanded version of vendorlib, so that you
3984 may use it directly in Makefiles or shell scripts.
3985
3986vendorprefix (vendorprefix.U):
3987 This variable holds the full absolute path of the directory below
3988 which the vendor will install add-on packages.
f868067f 3989 See INSTALL for usage and examples.
a3635516
JH
3990
3991vendorprefixexp (vendorprefix.U):
3992 This variable holds the full absolute path of the directory below
3993 which the vendor will install add-on packages. Derived from vendorprefix.
3994
781b178c 3995version (patchlevel.U):
ff935051 3996 The full version number of this package, such as 5.6.1 (or 5_6_1).
c890dc6c 3997 This combines revision, patchlevel, and subversion to get the
ff935051
JH
3998 full version number, including any possible subversions.
3999 This is suitable for use as a directory name, and hence is
4000 filesystem dependent.
781b178c 4001
27713a04
JH
4002version_patchlevel_string (patchlevel.U):
4003 This is a string combining version, subversion and
4004 perl_patchlevel (if perl_patchlevel is non-zero).
4005 It is typically something like
4006 'version 7 subversion 1' or
4007 'version 7 subversion 1 patchlevel 11224'
4008 It is computed here to avoid duplication of code in myconfig.SH
4009 and lib/Config.pm.
4010
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4011versiononly (versiononly.U):
4012 If set, this symbol indicates that only the version-specific
4013 components of a perl installation should be installed.
4014 This may be useful for making a test installation of a new
4015 version without disturbing the existing installation.
4016 Setting versiononly is equivalent to setting installperl's -v option.
4017 In particular, the non-versioned scripts and programs such as
4018 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
4019 (see INSTALL for a more complete list). Nor are the man
4020 pages installed.
4021 Usually, this is undef.
4022
781b178c
JH
4023vi (Loc.U):
4024 This variable is defined but not used by Configure.
4025 The value is a plain '' and is not useful.
4026
4027voidflags (voidflags.U):
4028 This variable contains the eventual value of the VOIDFLAGS symbol,
4029 which indicates how much support of the void type is given by this
4030 compiler. See VOIDFLAGS for more info.
4031
4032xlibpth (libpth.U):
4033 This variable holds extra path (space-separated) used to find
4034 libraries on this platform, for example CPU-specific libraries
4035 (on multi-CPU platforms) may be listed here.
4036
fe749a9f
JH
4037xs_apiversion (xs_apiversion.U):
4038 This variable contains the version of the oldest perl binary
4039 compatible with the present perl. perl.c:incpush() and
4040 lib/lib.pm will automatically search in $sitearch for older
4041 directories across major versions back to xs_apiversion.
4042 This is only useful if you have a