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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
434d_closedir (d_closedir.U):
435 This variable conditionally defines HAS_CLOSEDIR if closedir() is
436 available.
437
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438d_cmsghdr_s (d_cmsghdr_s.U):
439 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
440 which indicates that the struct cmsghdr is supported.
441
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442d_const (d_const.U):
443 This variable conditionally defines the HASCONST symbol, which
444 indicates to the C program that this C compiler knows about the
445 const type.
446
447d_crypt (d_crypt.U):
448 This variable conditionally defines the CRYPT symbol, which
449 indicates to the C program that the crypt() routine is available
450 to encrypt passwords and the like.
451
452d_csh (d_csh.U):
453 This variable conditionally defines the CSH symbol, which
454 indicates to the C program that the C-shell exists.
455
456d_cuserid (d_cuserid.U):
457 This variable conditionally defines the HAS_CUSERID symbol, which
458 indicates to the C program that the cuserid() routine is available
459 to get character login names.
460
461d_dbl_dig (d_dbl_dig.U):
462 This variable conditionally defines d_dbl_dig if this system's
463 header files provide DBL_DIG, which is the number of significant
464 digits in a double precision number.
465
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466d_dbminitproto (d_dbminitproto.U):
467 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
468 which indicates to the C program that the system provides
469 a prototype for the dbminit() function. Otherwise, it is
470 up to the program to supply one.
471
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472d_difftime (d_difftime.U):
473 This variable conditionally defines the HAS_DIFFTIME symbol, which
474 indicates to the C program that the difftime() routine is available.
475
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476d_dirnamlen (i_dirent.U):
477 This variable conditionally defines DIRNAMLEN, which indicates
478 to the C program that the length of directory entry names is
479 provided by a d_namelen field.
480
481d_dlerror (d_dlerror.U):
482 This variable conditionally defines the HAS_DLERROR symbol, which
483 indicates to the C program that the dlerror() routine is available.
484
485d_dlopen (d_dlopen.U):
486 This variable conditionally defines the HAS_DLOPEN symbol, which
487 indicates to the C program that the dlopen() routine is available.
488
489d_dlsymun (d_dlsymun.U):
490 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
491 indicates that we need to prepend an underscore to the symbol
492 name before calling dlsym().
493
494d_dosuid (d_dosuid.U):
495 This variable conditionally defines the symbol DOSUID, which
496 tells the C program that it should insert setuid emulation code
497 on hosts which have setuid #! scripts disabled.
498
499d_drand48proto (d_drand48proto.U):
500 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
501 which indicates to the C program that the system provides
502 a prototype for the drand48() function. Otherwise, it is
503 up to the program to supply one.
504
505d_dup2 (d_dup2.U):
506 This variable conditionally defines HAS_DUP2 if dup2() is
507 available to duplicate file descriptors.
508
509d_eaccess (d_eaccess.U):
510 This variable conditionally defines the HAS_EACCESS symbol, which
511 indicates to the C program that the eaccess() routine is available.
512
513d_endgrent (d_endgrent.U):
514 This variable conditionally defines the HAS_ENDGRENT symbol, which
515 indicates to the C program that the endgrent() routine is available
516 for sequential access of the group database.
517
518d_endhent (d_endhent.U):
519 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
520 available to close whatever was being used for host queries.
521
522d_endnent (d_endnent.U):
523 This variable conditionally defines HAS_ENDNETENT if endnetent() is
524 available to close whatever was being used for network queries.
525
526d_endpent (d_endpent.U):
527 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
528 available to close whatever was being used for protocol queries.
529
530d_endpwent (d_endpwent.U):
531 This variable conditionally defines the HAS_ENDPWENT symbol, which
532 indicates to the C program that the endpwent() routine is available
533 for sequential access of the passwd database.
534
535d_endsent (d_endsent.U):
536 This variable conditionally defines HAS_ENDSERVENT if endservent() is
537 available to close whatever was being used for service queries.
538
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539d_eofnblk (nblock_io.U):
540 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
541 when reading from a non-blocking I/O source.
542
543d_eunice (Guess.U):
544 This variable conditionally defines the symbols EUNICE and VAX, which
545 alerts the C program that it must deal with ideosyncracies of VMS.
546
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547d_fchdir (d_fchdir.U):
548 This variable conditionally defines the HAS_FCHDIR symbol, which
549 indicates to the C program that the fchdir() routine is available.
550
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551d_fchmod (d_fchmod.U):
552 This variable conditionally defines the HAS_FCHMOD symbol, which
553 indicates to the C program that the fchmod() routine is available
554 to change mode of opened files.
555
556d_fchown (d_fchown.U):
557 This variable conditionally defines the HAS_FCHOWN symbol, which
558 indicates to the C program that the fchown() routine is available
559 to change ownership of opened files.
560
561d_fcntl (d_fcntl.U):
562 This variable conditionally defines the HAS_FCNTL symbol, and indicates
563 whether the fcntl() function exists
564
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565d_fcntl_can_lock (d_fcntl_can_lock.U):
566 This variable conditionally defines the FCNTL_CAN_LOCK symbol
567 and indicates whether file locking with fcntl() works.
568
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569d_fd_macros (d_fd_set.U):
570 This variable contains the eventual value of the HAS_FD_MACROS symbol,
571 which indicates if your C compiler knows about the macros which
572 manipulate an fd_set.
573
574d_fd_set (d_fd_set.U):
575 This variable contains the eventual value of the HAS_FD_SET symbol,
576 which indicates if your C compiler knows about the fd_set typedef.
577
578d_fds_bits (d_fd_set.U):
579 This variable contains the eventual value of the HAS_FDS_BITS symbol,
580 which indicates if your fd_set typedef contains the fds_bits member.
581 If you have an fd_set typedef, but the dweebs who installed it did
582 a half-fast job and neglected to provide the macros to manipulate
583 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
584
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585d_fgetpos (d_fgetpos.U):
586 This variable conditionally defines HAS_FGETPOS if fgetpos() is
587 available to get the file position indicator.
588
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589d_flexfnam (d_flexfnam.U):
590 This variable conditionally defines the FLEXFILENAMES symbol, which
591 indicates that the system supports filenames longer than 14 characters.
592
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593d_flock (d_flock.U):
594 This variable conditionally defines HAS_FLOCK if flock() is
595 available to do file locking.
596
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597d_flockproto (d_flockproto.U):
598 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
599 which indicates to the C program that the system provides
600 a prototype for the flock() function. Otherwise, it is
601 up to the program to supply one.
602
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603d_fork (d_fork.U):
604 This variable conditionally defines the HAS_FORK symbol, which
605 indicates to the C program that the fork() routine is available.
606
607d_fpathconf (d_pathconf.U):
608 This variable conditionally defines the HAS_FPATHCONF symbol, which
609 indicates to the C program that the pathconf() routine is available
610 to determine file-system related limits and options associated
611 with a given open file descriptor.
612
c890dc6c 613d_fpos64_t (d_fpos64_t.U):
ca24dfc6 614 This symbol will be defined if the C compiler supports fpos64_t.
781b178c 615
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616d_frexpl (d_frexpl.U):
617 This variable conditionally defines the HAS_FREXPL symbol, which
618 indicates to the C program that the frexpl() routine is available.
619
ad27e871 620d_fs_data_s (d_fs_data_s.U):
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621 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
622 which indicates that the struct fs_data is supported.
623
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624d_fseeko (d_fseeko.U):
625 This variable conditionally defines the HAS_FSEEKO symbol, which
626 indicates to the C program that the fseeko() routine is available.
627
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628d_fsetpos (d_fsetpos.U):
629 This variable conditionally defines HAS_FSETPOS if fsetpos() is
630 available to set the file position indicator.
631
0545a864 632d_fstatfs (d_fstatfs.U):
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633 This variable conditionally defines the HAS_FSTATFS symbol, which
634 indicates to the C program that the fstatfs() routine is available.
635
636d_fstatvfs (d_statvfs.U):
637 This variable conditionally defines the HAS_FSTATVFS symbol, which
638 indicates to the C program that the fstatvfs() routine is available.
639
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640d_fsync (d_fsync.U):
641 This variable conditionally defines the HAS_FSYNC symbol, which
642 indicates to the C program that the fsync() routine is available.
643
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644d_ftello (d_ftello.U):
645 This variable conditionally defines the HAS_FTELLO symbol, which
646 indicates to the C program that the ftello() routine is available.
647
648d_ftime (d_ftime.U):
649 This variable conditionally defines the HAS_FTIME symbol, which indicates
650 that the ftime() routine exists. The ftime() routine is basically
651 a sub-second accuracy clock.
652
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653d_Gconvert (d_gconvert.U):
654 This variable holds what Gconvert is defined as to convert
655 floating point numbers into strings. It could be 'gconvert'
656 or a more complex macro emulating gconvert with gcvt() or sprintf.
657 Possible values are:
658 d_Gconvert='gconvert((x),(n),(t),(b))'
659 d_Gconvert='gcvt((x),(n),(b))'
660 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
661
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662d_getcwd (d_getcwd.U):
663 This variable conditionally defines the HAS_GETCWD symbol, which
664 indicates to the C program that the getcwd() routine is available
665 to get the current working directory.
666
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667d_getespwnam (d_getespwnam.U):
668 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
669 available to retrieve enchanced (shadow) password entries by name.
670
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671d_getfsstat (d_getfsstat.U):
672 This variable conditionally defines the HAS_GETFSSTAT symbol, which
673 indicates to the C program that the getfsstat() routine is available.
674
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675d_getgrent (d_getgrent.U):
676 This variable conditionally defines the HAS_GETGRENT symbol, which
677 indicates to the C program that the getgrent() routine is available
678 for sequential access of the group database.
679
680d_getgrps (d_getgrps.U):
681 This variable conditionally defines the HAS_GETGROUPS symbol, which
682 indicates to the C program that the getgroups() routine is available
683 to get the list of process groups.
684
685d_gethbyaddr (d_gethbyad.U):
686 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
687 indicates to the C program that the gethostbyaddr() routine is available
688 to look up hosts by their IP addresses.
689
690d_gethbyname (d_gethbynm.U):
691 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
692 indicates to the C program that the gethostbyname() routine is available
693 to look up host names in some data base or other.
694
695d_gethent (d_gethent.U):
696 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
697 available to look up host names in some data base or another.
698
699d_gethname (d_gethname.U):
700 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
701 indicates to the C program that the gethostname() routine may be
702 used to derive the host name.
703
704d_gethostprotos (d_gethostprotos.U):
705 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
706 which indicates to the C program that <netdb.h> supplies
707 prototypes for the various gethost*() functions.
708 See also netdbtype.U for probing for various netdb types.
709
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710d_getitimer (d_getitimer.U):
711 This variable conditionally defines the HAS_GETITIMER symbol, which
712 indicates to the C program that the getitimer() routine is available.
713
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714d_getlogin (d_getlogin.U):
715 This variable conditionally defines the HAS_GETLOGIN symbol, which
716 indicates to the C program that the getlogin() routine is available
717 to get the login name.
718
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719d_getmnt (d_getmnt.U):
720 This variable conditionally defines the HAS_GETMNT symbol, which
721 indicates to the C program that the getmnt() routine is available
722 to retrieve one or more mount info blocks by filename.
723
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724d_getmntent (d_getmntent.U):
725 This variable conditionally defines the HAS_GETMNTENT symbol, which
726 indicates to the C program that the getmntent() routine is available
0617aed7 727 to iterate through mounted files to get their mount info.
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728
729d_getnbyaddr (d_getnbyad.U):
730 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
731 indicates to the C program that the getnetbyaddr() routine is available
732 to look up networks by their IP addresses.
733
734d_getnbyname (d_getnbynm.U):
735 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
736 indicates to the C program that the getnetbyname() routine is available
737 to look up networks by their names.
738
739d_getnent (d_getnent.U):
740 This variable conditionally defines HAS_GETNETENT if getnetent() is
741 available to look up network names in some data base or another.
742
743d_getnetprotos (d_getnetprotos.U):
744 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
745 which indicates to the C program that <netdb.h> supplies
746 prototypes for the various getnet*() functions.
747 See also netdbtype.U for probing for various netdb types.
748
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749d_getpagsz (d_getpagsz.U):
750 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
751 is available to get the system page size.
752
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753d_getpbyname (d_getprotby.U):
754 This variable conditionally defines the HAS_GETPROTOBYNAME
755 symbol, which indicates to the C program that the
756 getprotobyname() routine is available to look up protocols
757 by their name.
758
759d_getpbynumber (d_getprotby.U):
760 This variable conditionally defines the HAS_GETPROTOBYNUMBER
761 symbol, which indicates to the C program that the
762 getprotobynumber() routine is available to look up protocols
763 by their number.
764
765d_getpent (d_getpent.U):
766 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
767 available to look up protocols in some data base or another.
768
769d_getpgid (d_getpgid.U):
770 This variable conditionally defines the HAS_GETPGID symbol, which
771 indicates to the C program that the getpgid(pid) function
772 is available to get the process group id.
773
774d_getpgrp2 (d_getpgrp2.U):
775 This variable conditionally defines the HAS_GETPGRP2 symbol, which
776 indicates to the C program that the getpgrp2() (as in DG/UX) routine
777 is available to get the current process group.
778
779d_getpgrp (d_getpgrp.U):
780 This variable conditionally defines HAS_GETPGRP if getpgrp() is
781 available to get the current process group.
782
783d_getppid (d_getppid.U):
784 This variable conditionally defines the HAS_GETPPID symbol, which
785 indicates to the C program that the getppid() routine is available
786 to get the parent process ID.
787
788d_getprior (d_getprior.U):
789 This variable conditionally defines HAS_GETPRIORITY if getpriority()
790 is available to get a process's priority.
791
792d_getprotoprotos (d_getprotoprotos.U):
793 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
794 which indicates to the C program that <netdb.h> supplies
795 prototypes for the various getproto*() functions.
796 See also netdbtype.U for probing for various netdb types.
797
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798d_getprpwnam (d_getprpwnam.U):
799 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
800 available to retrieve protected (shadow) password entries by name.
801
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802d_getpwent (d_getpwent.U):
803 This variable conditionally defines the HAS_GETPWENT symbol, which
804 indicates to the C program that the getpwent() routine is available
805 for sequential access of the passwd database.
806
807d_getsbyname (d_getsrvby.U):
808 This variable conditionally defines the HAS_GETSERVBYNAME
809 symbol, which indicates to the C program that the
810 getservbyname() routine is available to look up services
811 by their name.
812
813d_getsbyport (d_getsrvby.U):
814 This variable conditionally defines the HAS_GETSERVBYPORT
815 symbol, which indicates to the C program that the
816 getservbyport() routine is available to look up services
817 by their port.
818
819d_getsent (d_getsent.U):
820 This variable conditionally defines HAS_GETSERVENT if getservent() is
821 available to look up network services in some data base or another.
822
823d_getservprotos (d_getservprotos.U):
824 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
825 which indicates to the C program that <netdb.h> supplies
826 prototypes for the various getserv*() functions.
827 See also netdbtype.U for probing for various netdb types.
828
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829d_getspnam (d_getspnam.U):
830 This variable conditionally defines HAS_GETSPNAM if getspnam() is
831 available to retrieve SysV shadow password entries by name.
832
833d_gettimeod (d_ftime.U):
834 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
835 indicates that the gettimeofday() system call exists (to obtain a
836 sub-second accuracy clock). You should probably include <sys/resource.h>.
837
838d_gnulibc (d_gnulibc.U):
839 Defined if we're dealing with the GNU C Library.
840
841d_grpasswd (i_grp.U):
842 This variable conditionally defines GRPASSWD, which indicates
843 that struct group in <grp.h> contains gr_passwd.
844
845d_hasmntopt (d_hasmntopt.U):
846 This variable conditionally defines the HAS_HASMNTOPT symbol, which
847 indicates to the C program that the hasmntopt() routine is available
848 to query the mount options of file systems.
849
850d_htonl (d_htonl.U):
851 This variable conditionally defines HAS_HTONL if htonl() and its
852 friends are available to do network order byte swapping.
853
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854d_iconv (d_iconv.U):
855 This variable conditionally defines the HAS_ICONV symbol, which
856 indicates to the C program that the iconv() routine is available.
857
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858d_index (d_strchr.U):
859 This variable conditionally defines HAS_INDEX if index() and
860 rindex() are available for string searching.
861
862d_inetaton (d_inetaton.U):
863 This variable conditionally defines the HAS_INET_ATON symbol, which
864 indicates to the C program that the inet_aton() function is available
865 to parse IP address "dotted-quad" strings.
866
13b3f787 867d_int64_t (d_int64_t.U):
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868 This symbol will be defined if the C compiler supports int64_t.
869
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870d_isascii (d_isascii.U):
871 This variable conditionally defines the HAS_ISASCII constant,
872 which indicates to the C program that isascii() is available.
873
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874d_isnan (d_isnan.U):
875 This variable conditionally defines the HAS_ISNAN symbol, which
876 indicates to the C program that the isnan() routine is available.
877
878d_isnanl (d_isnanl.U):
879 This variable conditionally defines the HAS_ISNANL symbol, which
880 indicates to the C program that the isnanl() routine is available.
881
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882d_killpg (d_killpg.U):
883 This variable conditionally defines the HAS_KILLPG symbol, which
884 indicates to the C program that the killpg() routine is available
885 to kill process groups.
886
887d_lchown (d_lchown.U):
888 This variable conditionally defines the HAS_LCHOWN symbol, which
889 indicates to the C program that the lchown() routine is available
890 to operate on a symbolic link (instead of following the link).
891
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892d_ldbl_dig (d_ldbl_dig.U):
893 This variable conditionally defines d_ldbl_dig if this system's
894 header files provide LDBL_DIG, which is the number of significant
895 digits in a long double precision number.
896
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897d_link (d_link.U):
898 This variable conditionally defines HAS_LINK if link() is
899 available to create hard links.
900
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901d_locconv (d_locconv.U):
902 This variable conditionally defines HAS_LOCALECONV if localeconv() is
903 available for numeric and monetary formatting conventions.
904
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905d_lockf (d_lockf.U):
906 This variable conditionally defines HAS_LOCKF if lockf() is
907 available to do file locking.
908
909d_longdbl (d_longdbl.U):
910 This variable conditionally defines HAS_LONG_DOUBLE if
911 the long double type is supported.
912
913d_longlong (d_longlong.U):
914 This variable conditionally defines HAS_LONG_LONG if
915 the long long type is supported.
916
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917d_lseekproto (d_lseekproto.U):
918 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
919 which indicates to the C program that the system provides
920 a prototype for the lseek() function. Otherwise, it is
921 up to the program to supply one.
922
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923d_lstat (d_lstat.U):
924 This variable conditionally defines HAS_LSTAT if lstat() is
925 available to do file stats on symbolic links.
926
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927d_madvise (d_madvise.U):
928 This variable conditionally defines HAS_MADVISE if madvise() is
929 available to map a file into memory.
930
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931d_mblen (d_mblen.U):
932 This variable conditionally defines the HAS_MBLEN symbol, which
933 indicates to the C program that the mblen() routine is available
934 to find the number of bytes in a multibye character.
935
936d_mbstowcs (d_mbstowcs.U):
937 This variable conditionally defines the HAS_MBSTOWCS symbol, which
938 indicates to the C program that the mbstowcs() routine is available
939 to convert a multibyte string into a wide character string.
940
941d_mbtowc (d_mbtowc.U):
942 This variable conditionally defines the HAS_MBTOWC symbol, which
943 indicates to the C program that the mbtowc() routine is available
944 to convert multibyte to a wide character.
945
946d_memchr (d_memchr.U):
947 This variable conditionally defines the HAS_MEMCHR symbol, which
948 indicates to the C program that the memchr() routine is available
949 to locate characters within a C string.
950
951d_memcmp (d_memcmp.U):
952 This variable conditionally defines the HAS_MEMCMP symbol, which
953 indicates to the C program that the memcmp() routine is available
954 to compare blocks of memory.
955
956d_memcpy (d_memcpy.U):
957 This variable conditionally defines the HAS_MEMCPY symbol, which
958 indicates to the C program that the memcpy() routine is available
959 to copy blocks of memory.
960
961d_memmove (d_memmove.U):
962 This variable conditionally defines the HAS_MEMMOVE symbol, which
963 indicates to the C program that the memmove() routine is available
964 to copy potentatially overlapping blocks of memory.
965
966d_memset (d_memset.U):
967 This variable conditionally defines the HAS_MEMSET symbol, which
968 indicates to the C program that the memset() routine is available
969 to set blocks of memory.
970
971d_mkdir (d_mkdir.U):
972 This variable conditionally defines the HAS_MKDIR symbol, which
973 indicates to the C program that the mkdir() routine is available
974 to create directories..
975
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976d_mkdtemp (d_mkdtemp.U):
977 This variable conditionally defines the HAS_MKDTEMP symbol, which
978 indicates to the C program that the mkdtemp() routine is available
979 to exclusively create a uniquely named temporary directory.
980
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981d_mkfifo (d_mkfifo.U):
982 This variable conditionally defines the HAS_MKFIFO symbol, which
983 indicates to the C program that the mkfifo() routine is available.
984
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985d_mkstemp (d_mkstemp.U):
986 This variable conditionally defines the HAS_MKSTEMP symbol, which
987 indicates to the C program that the mkstemp() routine is available
988 to exclusively create and open a uniquely named temporary file.
989
990d_mkstemps (d_mkstemps.U):
991 This variable conditionally defines the HAS_MKSTEMPS symbol, which
992 indicates to the C program that the mkstemps() routine is available
993 to exclusively create and open a uniquely named (with a suffix)
994 temporary file.
995
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996d_mktime (d_mktime.U):
997 This variable conditionally defines the HAS_MKTIME symbol, which
998 indicates to the C program that the mktime() routine is available.
999
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1000d_mmap (d_mmap.U):
1001 This variable conditionally defines HAS_MMAP if mmap() is
1002 available to map a file into memory.
1003
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1004d_modfl (d_modfl.U):
1005 This variable conditionally defines the HAS_MODFL symbol, which
1006 indicates to the C program that the modfl() routine is available.
1007
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1008d_modfl_pow32_bug (d_modfl.U):
1009 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1010 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1011 For example from 4294967303.150000 one would get 4294967302.000000
1012 and 1.150000. The bug has been seen in certain versions of glibc,
1013 release 2.2.2 is known to be okay.
1014
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1015d_mprotect (d_mprotect.U):
1016 This variable conditionally defines HAS_MPROTECT if mprotect() is
1017 available to modify the access protection of a memory mapped file.
1018
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1019d_msg (d_msg.U):
1020 This variable conditionally defines the HAS_MSG symbol, which
1021 indicates that the entire msg*(2) library is present.
1022
1023d_msg_ctrunc (d_socket.U):
1024 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1025 which indicates that the MSG_CTRUNC is available. #ifdef is
1026 not enough because it may be an enum, glibc has been known to do this.
1027
1028d_msg_dontroute (d_socket.U):
1029 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1030 which indicates that the MSG_DONTROUTE is available. #ifdef is
1031 not enough because it may be an enum, glibc has been known to do this.
1032
1033d_msg_oob (d_socket.U):
1034 This variable conditionally defines the HAS_MSG_OOB symbol,
1035 which indicates that the MSG_OOB is available. #ifdef is
1036 not enough because it may be an enum, glibc has been known to do this.
1037
1038d_msg_peek (d_socket.U):
1039 This variable conditionally defines the HAS_MSG_PEEK symbol,
1040 which indicates that the MSG_PEEK is available. #ifdef is
1041 not enough because it may be an enum, glibc has been known to do this.
1042
1043d_msg_proxy (d_socket.U):
1044 This variable conditionally defines the HAS_MSG_PROXY symbol,
1045 which indicates that the MSG_PROXY is available. #ifdef is
1046 not enough because it may be an enum, glibc has been known to do this.
1047
1048d_msgctl (d_msgctl.U):
1049 This variable conditionally defines the HAS_MSGCTL symbol, which
1050 indicates to the C program that the msgctl() routine is available.
1051
1052d_msgget (d_msgget.U):
1053 This variable conditionally defines the HAS_MSGGET symbol, which
1054 indicates to the C program that the msgget() routine is available.
1055
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1056d_msghdr_s (d_msghdr_s.U):
1057 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1058 which indicates that the struct msghdr is supported.
1059
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1060d_msgrcv (d_msgrcv.U):
1061 This variable conditionally defines the HAS_MSGRCV symbol, which
1062 indicates to the C program that the msgrcv() routine is available.
1063
1064d_msgsnd (d_msgsnd.U):
1065 This variable conditionally defines the HAS_MSGSND symbol, which
1066 indicates to the C program that the msgsnd() routine is available.
1067
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1068d_msync (d_msync.U):
1069 This variable conditionally defines HAS_MSYNC if msync() is
1070 available to synchronize a mapped file.
1071
1072d_munmap (d_munmap.U):
1073 This variable conditionally defines HAS_MUNMAP if munmap() is
1074 available to unmap a region mapped by mmap().
1075
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1076d_mymalloc (mallocsrc.U):
1077 This variable conditionally defines MYMALLOC in case other parts
1078 of the source want to take special action if MYMALLOC is used.
1079 This may include different sorts of profiling or error detection.
1080
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1081d_nice (d_nice.U):
1082 This variable conditionally defines the HAS_NICE symbol, which
1083 indicates to the C program that the nice() routine is available.
1084
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1085d_nl_langinfo (d_nl_langinfo.U):
1086 This variable conditionally defines the HAS_NL_LANGINFO symbol, which
1087 indicates to the C program that the nl_langinfo() routine is available.
1088
78691af5 1089d_nv_preserves_uv (perlxv.U):
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1090 This variable indicates whether a variable of type nvtype
1091 can preserve all the bits a variable of type uvtype.
1092
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1093d_nv_preserves_uv_bits (perlxv.U):
1094 This variable indicates how many of bits type uvtype
1095 a variable nvtype can preserve.
1096
c890dc6c 1097d_off64_t (d_off64_t.U):
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1098 This symbol will be defined if the C compiler supports off64_t.
1099
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1100d_old_pthread_create_joinable (d_pthrattrj.U):
1101 This variable conditionally defines pthread_create_joinable.
1102 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1103
1104d_oldpthreads (usethreads.U):
1105 This variable conditionally defines the OLD_PTHREADS_API symbol,
1106 and indicates that Perl should be built to use the old
8c09e4ca 1107 draft POSIX threads API. This is only potentially meaningful if
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1108 usethreads is set.
1109
1110d_oldsock (d_socket.U):
1111 This variable conditionally defines the OLDSOCKET symbol, which
1112 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1113
1114d_open3 (d_open3.U):
1115 This variable conditionally defines the HAS_OPEN3 manifest constant,
1116 which indicates to the C program that the 3 argument version of
1117 the open(2) function is available.
1118
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1119d_pathconf (d_pathconf.U):
1120 This variable conditionally defines the HAS_PATHCONF symbol, which
1121 indicates to the C program that the pathconf() routine is available
1122 to determine file-system related limits and options associated
1123 with a given filename.
1124
1125d_pause (d_pause.U):
1126 This variable conditionally defines the HAS_PAUSE symbol, which
1127 indicates to the C program that the pause() routine is available
1128 to suspend a process until a signal is received.
1129
3b777bb4
GS
1130d_perl_otherlibdirs (otherlibdirs.U):
1131 This variable conditionally defines PERL_OTHERLIBDIRS, which
1132 contains a colon-separated set of paths for the perl binary to
1133 include in @INC. See also otherlibdirs.
1134
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1135d_phostname (d_gethname.U):
1136 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1137 contains the shell command which, when fed to popen(), may be
1138 used to derive the host name.
1139
1140d_pipe (d_pipe.U):
1141 This variable conditionally defines the HAS_PIPE symbol, which
1142 indicates to the C program that the pipe() routine is available
1143 to create an inter-process channel.
1144
1145d_poll (d_poll.U):
1146 This variable conditionally defines the HAS_POLL symbol, which
1147 indicates to the C program that the poll() routine is available
1148 to poll active file descriptors.
1149
1150d_portable (d_portable.U):
1151 This variable conditionally defines the PORTABLE symbol, which
1152 indicates to the C program that it should not assume that it is
1153 running on the machine it was compiled on.
1154
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1155d_PRId64 (quadfio.U):
1156 This variable conditionally defines the PERL_PRId64 symbol, which
1157 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1158
1159d_PRIeldbl (longdblfio.U):
6b356c8e 1160 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1161 indiciates that stdio has a symbol to print long doubles.
1162
6b356c8e
JH
1163d_PRIEUldbl (longdblfio.U):
1164 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1165 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1166 The 'U' in the name is to separate this from d_PRIeldbl so that even
1167 case-blind systems can see the difference.
ff935051
JH
1168
1169d_PRIfldbl (longdblfio.U):
6b356c8e 1170 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1171 indiciates that stdio has a symbol to print long doubles.
1172
6b356c8e
JH
1173d_PRIFUldbl (longdblfio.U):
1174 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1175 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1176 The 'U' in the name is to separate this from d_PRIfldbl so that even
1177 case-blind systems can see the difference.
ff935051
JH
1178
1179d_PRIgldbl (longdblfio.U):
6b356c8e 1180 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051
JH
1181 indiciates that stdio has a symbol to print long doubles.
1182
6b356c8e
JH
1183d_PRIGUldbl (longdblfio.U):
1184 This variable conditionally defines the PERL_PRIfldbl symbol, which
ff935051 1185 indiciates that stdio has a symbol to print long doubles.
6b356c8e
JH
1186 The 'U' in the name is to separate this from d_PRIgldbl so that even
1187 case-blind systems can see the difference.
ff935051
JH
1188
1189d_PRIi64 (quadfio.U):
1190 This variable conditionally defines the PERL_PRIi64 symbol, which
1191 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1192
1193d_PRIo64 (quadfio.U):
1194 This variable conditionally defines the PERL_PRIo64 symbol, which
1195 indiciates that stdio has a symbol to print 64-bit octal numbers.
1196
1197d_PRIu64 (quadfio.U):
1198 This variable conditionally defines the PERL_PRIu64 symbol, which
1199 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1200 numbers.
1201
1202d_PRIx64 (quadfio.U):
1203 This variable conditionally defines the PERL_PRIx64 symbol, which
1204 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1205
6b356c8e
JH
1206d_PRIXU64 (quadfio.U):
1207 This variable conditionally defines the PERL_PRIXU64 symbol, which
ff935051 1208 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
6b356c8e
JH
1209 The 'U' in the name is to separate this from d_PRIx64 so that even
1210 case-blind systems can see the difference.
ff935051 1211
d6483fcc
JH
1212d_pthread_atfork (d_pthread_atfork.U):
1213 This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
1214 which indicates to the C program that the pthread_atfork()
1215 routine is available.
1216
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1217d_pthread_yield (d_pthread_y.U):
1218 This variable conditionally defines the HAS_PTHREAD_YIELD
1219 symbol if the pthread_yield routine is available to yield
1220 the execution of the current thread.
1221
1222d_pwage (i_pwd.U):
1223 This variable conditionally defines PWAGE, which indicates
1224 that struct passwd contains pw_age.
1225
1226d_pwchange (i_pwd.U):
1227 This variable conditionally defines PWCHANGE, which indicates
1228 that struct passwd contains pw_change.
1229
1230d_pwclass (i_pwd.U):
1231 This variable conditionally defines PWCLASS, which indicates
1232 that struct passwd contains pw_class.
1233
1234d_pwcomment (i_pwd.U):
1235 This variable conditionally defines PWCOMMENT, which indicates
1236 that struct passwd contains pw_comment.
1237
1238d_pwexpire (i_pwd.U):
1239 This variable conditionally defines PWEXPIRE, which indicates
1240 that struct passwd contains pw_expire.
1241
1242d_pwgecos (i_pwd.U):
1243 This variable conditionally defines PWGECOS, which indicates
1244 that struct passwd contains pw_gecos.
1245
1246d_pwpasswd (i_pwd.U):
1247 This variable conditionally defines PWPASSWD, which indicates
1248 that struct passwd contains pw_passwd.
1249
1250d_pwquota (i_pwd.U):
1251 This variable conditionally defines PWQUOTA, which indicates
1252 that struct passwd contains pw_quota.
1253
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JH
1254d_qgcvt (d_qgcvt.U):
1255 This variable conditionally defines the HAS_QGCVT symbol, which
1256 indicates to the C program that the qgcvt() routine is available.
1257
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1258d_quad (quadtype.U):
1259 This variable, if defined, tells that there's a 64-bit integer type,
1260 quadtype.
1261
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1262d_readdir (d_readdir.U):
1263 This variable conditionally defines HAS_READDIR if readdir() is
1264 available to read directory entries.
1265
1266d_readlink (d_readlink.U):
1267 This variable conditionally defines the HAS_READLINK symbol, which
1268 indicates to the C program that the readlink() routine is available
1269 to read the value of a symbolic link.
1270
4e0554ec
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1271d_readv (d_readv.U):
1272 This variable conditionally defines the HAS_READV symbol, which
1273 indicates to the C program that the readv() routine is available.
1274
1275d_recvmsg (d_recvmsg.U):
1276 This variable conditionally defines the HAS_RECVMSG symbol, which
1277 indicates to the C program that the recvmsg() routine is available.
1278
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1279d_rename (d_rename.U):
1280 This variable conditionally defines the HAS_RENAME symbol, which
1281 indicates to the C program that the rename() routine is available
1282 to rename files.
1283
1284d_rewinddir (d_readdir.U):
1285 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1286 available.
1287
1288d_rmdir (d_rmdir.U):
1289 This variable conditionally defines HAS_RMDIR if rmdir() is
1290 available to remove directories.
1291
1292d_safebcpy (d_safebcpy.U):
1293 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
b6cc3bc4
AD
1294 the bcopy() routine can do overlapping copies. Normally, you
1295 should probably use memmove().
781b178c
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1296
1297d_safemcpy (d_safemcpy.U):
1298 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1299 the memcpy() routine can do overlapping copies.
b6cc3bc4 1300 For overlapping copies, memmove() should be used, if available.
781b178c
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1301
1302d_sanemcmp (d_sanemcmp.U):
1303 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1304 the memcpy() routine is available and can be used to compare relative
1305 magnitudes of chars with their high bits set.
1306
ef9f17be
JH
1307d_sbrkproto (d_sbrkproto.U):
1308 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1309 which indicates to the C program that the system provides
1310 a prototype for the sbrk() function. Otherwise, it is
1311 up to the program to supply one.
1312
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1313d_sched_yield (d_pthread_y.U):
1314 This variable conditionally defines the HAS_SCHED_YIELD
1315 symbol if the sched_yield routine is available to yield
1316 the execution of the current thread.
1317
1318d_scm_rights (d_socket.U):
1319 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1320 which indicates that the SCM_RIGHTS is available. #ifdef is
1321 not enough because it may be an enum, glibc has been known to do this.
1322
6b356c8e
JH
1323d_SCNfldbl (longdblfio.U):
1324 This variable conditionally defines the PERL_PRIfldbl symbol, which
1325 indiciates that stdio has a symbol to scan long doubles.
1326
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1327d_seekdir (d_readdir.U):
1328 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1329 available.
1330
1331d_select (d_select.U):
1332 This variable conditionally defines HAS_SELECT if select() is
1333 available to select active file descriptors. A <sys/time.h>
1334 inclusion may be necessary for the timeout field.
1335
1336d_sem (d_sem.U):
1337 This variable conditionally defines the HAS_SEM symbol, which
1338 indicates that the entire sem*(2) library is present.
1339
1340d_semctl (d_semctl.U):
1341 This variable conditionally defines the HAS_SEMCTL symbol, which
1342 indicates to the C program that the semctl() routine is available.
1343
1344d_semctl_semid_ds (d_union_semun.U):
1345 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1346 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1347
1348d_semctl_semun (d_union_semun.U):
1349 This variable conditionally defines USE_SEMCTL_SEMUN, which
1350 indicates that union semun is to be used for semctl IPC_STAT.
1351
1352d_semget (d_semget.U):
1353 This variable conditionally defines the HAS_SEMGET symbol, which
1354 indicates to the C program that the semget() routine is available.
1355
1356d_semop (d_semop.U):
1357 This variable conditionally defines the HAS_SEMOP symbol, which
1358 indicates to the C program that the semop() routine is available.
1359
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JH
1360d_sendmsg (d_sendmsg.U):
1361 This variable conditionally defines the HAS_SENDMSG symbol, which
1362 indicates to the C program that the sendmsg() routine is available.
1363
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1364d_setegid (d_setegid.U):
1365 This variable conditionally defines the HAS_SETEGID symbol, which
1366 indicates to the C program that the setegid() routine is available
1367 to change the effective gid of the current program.
1368
1369d_seteuid (d_seteuid.U):
1370 This variable conditionally defines the HAS_SETEUID symbol, which
1371 indicates to the C program that the seteuid() routine is available
1372 to change the effective uid of the current program.
1373
1374d_setgrent (d_setgrent.U):
1375 This variable conditionally defines the HAS_SETGRENT symbol, which
1376 indicates to the C program that the setgrent() routine is available
1377 for initializing sequential access to the group database.
1378
1379d_setgrps (d_setgrps.U):
1380 This variable conditionally defines the HAS_SETGROUPS symbol, which
1381 indicates to the C program that the setgroups() routine is available
1382 to set the list of process groups.
1383
1384d_sethent (d_sethent.U):
1385 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1386 available.
1387
4e0554ec
JH
1388d_setitimer (d_setitimer.U):
1389 This variable conditionally defines the HAS_SETITIMER symbol, which
1390 indicates to the C program that the setitimer() routine is available.
1391
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JH
1392d_setlinebuf (d_setlnbuf.U):
1393 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1394 indicates to the C program that the setlinebuf() routine is available
1395 to change stderr or stdout from block-buffered or unbuffered to a
1396 line-buffered mode.
1397
1398d_setlocale (d_setlocale.U):
1399 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1400 available to handle locale-specific ctype implementations.
1401
1402d_setnent (d_setnent.U):
1403 This variable conditionally defines HAS_SETNETENT if setnetent() is
1404 available.
1405
1406d_setpent (d_setpent.U):
1407 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1408 available.
1409
1410d_setpgid (d_setpgid.U):
1411 This variable conditionally defines the HAS_SETPGID symbol if the
1412 setpgid(pid, gpid) function is available to set process group ID.
1413
1414d_setpgrp2 (d_setpgrp2.U):
1415 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1416 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1417 is available to set the current process group.
1418
1419d_setpgrp (d_setpgrp.U):
1420 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1421 available to set the current process group.
1422
1423d_setprior (d_setprior.U):
1424 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1425 is available to set a process's priority.
1426
af960fef
JH
1427d_setproctitle (d_setproctitle.U):
1428 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1429 which indicates to the C program that the setproctitle() routine
1430 is available.
1431
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1432d_setpwent (d_setpwent.U):
1433 This variable conditionally defines the HAS_SETPWENT symbol, which
1434 indicates to the C program that the setpwent() routine is available
1435 for initializing sequential access to the passwd database.
1436
1437d_setregid (d_setregid.U):
1438 This variable conditionally defines HAS_SETREGID if setregid() is
1439 available to change the real and effective gid of the current
1440 process.
1441
1442d_setresgid (d_setregid.U):
1443 This variable conditionally defines HAS_SETRESGID if setresgid() is
1444 available to change the real, effective and saved gid of the current
1445 process.
1446
1447d_setresuid (d_setreuid.U):
1448 This variable conditionally defines HAS_SETREUID if setresuid() is
1449 available to change the real, effective and saved uid of the current
1450 process.
1451
1452d_setreuid (d_setreuid.U):
1453 This variable conditionally defines HAS_SETREUID if setreuid() is
1454 available to change the real and effective uid of the current
1455 process.
1456
1457d_setrgid (d_setrgid.U):
1458 This variable conditionally defines the HAS_SETRGID symbol, which
1459 indicates to the C program that the setrgid() routine is available
1460 to change the real gid of the current program.
1461
1462d_setruid (d_setruid.U):
1463 This variable conditionally defines the HAS_SETRUID symbol, which
1464 indicates to the C program that the setruid() routine is available
1465 to change the real uid of the current program.
1466
1467d_setsent (d_setsent.U):
1468 This variable conditionally defines HAS_SETSERVENT if setservent() is
1469 available.
1470
1471d_setsid (d_setsid.U):
1472 This variable conditionally defines HAS_SETSID if setsid() is
1473 available to set the process group ID.
1474
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1475d_setvbuf (d_setvbuf.U):
1476 This variable conditionally defines the HAS_SETVBUF symbol, which
1477 indicates to the C program that the setvbuf() routine is available
1478 to change buffering on an open stdio stream.
1479
1480d_sfio (d_sfio.U):
1481 This variable conditionally defines the USE_SFIO symbol,
1482 and indicates whether sfio is available (and should be used).
1483
1484d_shm (d_shm.U):
1485 This variable conditionally defines the HAS_SHM symbol, which
1486 indicates that the entire shm*(2) library is present.
1487
1488d_shmat (d_shmat.U):
1489 This variable conditionally defines the HAS_SHMAT symbol, which
1490 indicates to the C program that the shmat() routine is available.
1491
1492d_shmatprototype (d_shmat.U):
1493 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1494 symbol, which indicates that sys/shm.h has a prototype for
1495 shmat.
1496
1497d_shmctl (d_shmctl.U):
1498 This variable conditionally defines the HAS_SHMCTL symbol, which
1499 indicates to the C program that the shmctl() routine is available.
1500
1501d_shmdt (d_shmdt.U):
1502 This variable conditionally defines the HAS_SHMDT symbol, which
1503 indicates to the C program that the shmdt() routine is available.
1504
1505d_shmget (d_shmget.U):
1506 This variable conditionally defines the HAS_SHMGET symbol, which
1507 indicates to the C program that the shmget() routine is available.
1508
1509d_sigaction (d_sigaction.U):
1510 This variable conditionally defines the HAS_SIGACTION symbol, which
1511 indicates that the Vr4 sigaction() routine is available.
1512
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JH
1513d_sigprocmask (d_sigprocmask.U):
1514 This variable conditionally defines HAS_SIGPROCMASK
1515 if sigprocmask() is available to examine or change the signal mask
1516 of the calling process.
1517
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1518d_sigsetjmp (d_sigsetjmp.U):
1519 This variable conditionally defines the HAS_SIGSETJMP symbol,
1520 which indicates that the sigsetjmp() routine is available to
1521 call setjmp() and optionally save the process's signal mask.
1522
49a78c82
JH
1523d_sockatmark (d_sockatmark.U):
1524 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1525 indicates to the C program that the sockatmark() routine is available.
1526
5af95cda
JH
1527d_sockatmarkproto (d_sockatmarkproto.U):
1528 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1529 which indicates to the C program that the system provides
1530 a prototype for the sockatmark() function. Otherwise, it is
1531 up to the program to supply one.
1532
781b178c
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1533d_socket (d_socket.U):
1534 This variable conditionally defines HAS_SOCKET, which indicates
1535 that the BSD socket interface is supported.
1536
13b3f787
JH
1537d_socklen_t (d_socklen_t.U):
1538 This symbol will be defined if the C compiler supports socklen_t.
1539
781b178c
JH
1540d_sockpair (d_socket.U):
1541 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1542 indicates that the BSD socketpair() is supported.
1543
6b356c8e
JH
1544d_socks5_init (d_socks5_init.U):
1545 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1546 indicates to the C program that the socks5_init() routine is available.
1547
68d4903c
JH
1548d_sqrtl (d_sqrtl.U):
1549 This variable conditionally defines the HAS_SQRTL symbol, which
1550 indicates to the C program that the sqrtl() routine is available.
1551
eef837ea
JH
1552d_sresgproto (d_sresgproto.U):
1553 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1554 which indicates to the C program that the system provides
1555 a prototype for the setresgid() function. Otherwise, it is
1556 up to the program to supply one.
1557
640374d0
JH
1558d_sresuproto (d_sresuproto.U):
1559 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1560 which indicates to the C program that the system provides
1561 a prototype for the setresuid() function. Otherwise, it is
1562 up to the program to supply one.
1563
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1564d_statblks (d_statblks.U):
1565 This variable conditionally defines USE_STAT_BLOCKS
1566 if this system has a stat structure declaring
1567 st_blksize and st_blocks.
1568
ad27e871 1569d_statfs_f_flags (d_statfs_f_flags.U):
0545a864 1570 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
781b178c
JH
1571 symbol, which indicates to struct statfs from has f_flags member.
1572 This kind of struct statfs is coming from sys/mount.h (BSD),
1573 not from sys/statfs.h (SYSV).
1574
ad27e871 1575d_statfs_s (d_statfs_s.U):
0545a864
JH
1576 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1577 which indicates that the struct statfs is supported.
1578
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1579d_statvfs (d_statvfs.U):
1580 This variable conditionally defines the HAS_STATVFS symbol, which
1581 indicates to the C program that the statvfs() routine is available.
1582
1583d_stdio_cnt_lval (d_stdstdio.U):
1584 This variable conditionally defines STDIO_CNT_LVALUE if the
1585 FILE_cnt macro can be used as an lvalue.
1586
1587d_stdio_ptr_lval (d_stdstdio.U):
1588 This variable conditionally defines STDIO_PTR_LVALUE if the
1589 FILE_ptr macro can be used as an lvalue.
1590
a7ffa9b9
NC
1591d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1592 This symbol is defined if using the FILE_ptr macro as an lvalue
1593 to increase the pointer by n leaves File_cnt(fp) unchanged.
1594
1595d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1596 This symbol is defined if using the FILE_ptr macro as an lvalue
1597 to increase the pointer by n has the side effect of decreasing the
1598 value of File_cnt(fp) by n.
1599
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1600d_stdio_stream_array (stdio_streams.U):
1601 This variable tells whether there is an array holding
1602 the stdio streams.
1603
1604d_stdiobase (d_stdstdio.U):
1605 This variable conditionally defines USE_STDIO_BASE if this system
1606 has a FILE structure declaring a usable _base field (or equivalent)
1607 in stdio.h.
1608
1609d_stdstdio (d_stdstdio.U):
1610 This variable conditionally defines USE_STDIO_PTR if this system
1611 has a FILE structure declaring usable _ptr and _cnt fields (or
1612 equivalent) in stdio.h.
1613
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JH
1614d_strchr (d_strchr.U):
1615 This variable conditionally defines HAS_STRCHR if strchr() and
1616 strrchr() are available for string searching.
1617
1618d_strcoll (d_strcoll.U):
1619 This variable conditionally defines HAS_STRCOLL if strcoll() is
1620 available to compare strings using collating information.
1621
1622d_strctcpy (d_strctcpy.U):
1623 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1624 indicates to the C program that this C compiler knows how to copy
1625 structures.
1626
1627d_strerrm (d_strerror.U):
1628 This variable holds what Strerrr is defined as to translate an error
1629 code condition into an error message string. It could be 'strerror'
1630 or a more complex macro emulating strrror with sys_errlist[], or the
1631 "unknown" string when both strerror and sys_errlist are missing.
1632
1633d_strerror (d_strerror.U):
1634 This variable conditionally defines HAS_STRERROR if strerror() is
1635 available to translate error numbers to strings.
1636
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JH
1637d_strftime (d_strftime.U):
1638 This variable conditionally defines the HAS_STRFTIME symbol, which
1639 indicates to the C program that the strftime() routine is available.
1640
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1641d_strtod (d_strtod.U):
1642 This variable conditionally defines the HAS_STRTOD symbol, which
1643 indicates to the C program that the strtod() routine is available
1644 to provide better numeric string conversion than atof().
1645
1646d_strtol (d_strtol.U):
1647 This variable conditionally defines the HAS_STRTOL symbol, which
1648 indicates to the C program that the strtol() routine is available
1649 to provide better numeric string conversion than atoi() and friends.
1650
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1651d_strtold (d_strtold.U):
1652 This variable conditionally defines the HAS_STRTOLD symbol, which
1653 indicates to the C program that the strtold() routine is available.
1654
76d49b1c
JH
1655d_strtoll (d_strtoll.U):
1656 This variable conditionally defines the HAS_STRTOLL symbol, which
1657 indicates to the C program that the strtoll() routine is available.
1658
d0e6d399
NC
1659d_strtoq (d_strtoq.U):
1660 This variable conditionally defines the HAS_STRTOQ symbol, which
1661 indicates to the C program that the strtoq() routine is available.
1662
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1663d_strtoul (d_strtoul.U):
1664 This variable conditionally defines the HAS_STRTOUL symbol, which
1665 indicates to the C program that the strtoul() routine is available
1666 to provide conversion of strings to unsigned long.
1667
ff935051 1668d_strtoull (d_strtoull.U):
11dc3f68
JH
1669 This variable conditionally defines the HAS_STRTOULL symbol, which
1670 indicates to the C program that the strtoull() routine is available.
1671
ff935051
JH
1672d_strtouq (d_strtouq.U):
1673 This variable conditionally defines the HAS_STRTOUQ symbol, which
1674 indicates to the C program that the strtouq() routine is available.
1675
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1676d_strxfrm (d_strxfrm.U):
1677 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1678 available to transform strings.
1679
1680d_suidsafe (d_dosuid.U):
1681 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1682 if setuid scripts can be secure. This test looks in /dev/fd/.
1683
1684d_symlink (d_symlink.U):
1685 This variable conditionally defines the HAS_SYMLINK symbol, which
1686 indicates to the C program that the symlink() routine is available
1687 to create symbolic links.
1688
1689d_syscall (d_syscall.U):
1690 This variable conditionally defines HAS_SYSCALL if syscall() is
1691 available call arbitrary system calls.
1692
5af95cda
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1693d_syscallproto (d_syscallproto.U):
1694 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1695 which indicates to the C program that the system provides
1696 a prototype for the syscall() function. Otherwise, it is
1697 up to the program to supply one.
1698
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1699d_sysconf (d_sysconf.U):
1700 This variable conditionally defines the HAS_SYSCONF symbol, which
1701 indicates to the C program that the sysconf() routine is available
1702 to determine system related limits and options.
1703
1704d_sysernlst (d_strerror.U):
1705 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1706 is available to translate error numbers to the symbolic name.
1707
1708d_syserrlst (d_strerror.U):
1709 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1710 available to translate error numbers to strings.
1711
1712d_system (d_system.U):
1713 This variable conditionally defines HAS_SYSTEM if system() is
1714 available to issue a shell command.
1715
1716d_tcgetpgrp (d_tcgtpgrp.U):
1717 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1718 indicates to the C program that the tcgetpgrp() routine is available.
1719 to get foreground process group ID.
1720
1721d_tcsetpgrp (d_tcstpgrp.U):
1722 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1723 indicates to the C program that the tcsetpgrp() routine is available
1724 to set foreground process group ID.
1725
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1726d_telldir (d_readdir.U):
1727 This variable conditionally defines HAS_TELLDIR if telldir() is
1728 available.
1729
1730d_telldirproto (d_telldirproto.U):
1731 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1732 which indicates to the C program that the system provides
1733 a prototype for the telldir() function. Otherwise, it is
1734 up to the program to supply one.
1735
1736d_time (d_time.U):
1737 This variable conditionally defines the HAS_TIME symbol, which indicates
1738 that the time() routine exists. The time() routine is normaly
1739 provided on UNIX systems.
1740
1741d_times (d_times.U):
1742 This variable conditionally defines the HAS_TIMES symbol, which indicates
1743 that the times() routine exists. The times() routine is normaly
1744 provided on UNIX systems. You may have to include <sys/times.h>.
1745
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1746d_truncate (d_truncate.U):
1747 This variable conditionally defines HAS_TRUNCATE if truncate() is
1748 available to truncate files.
1749
1750d_tzname (d_tzname.U):
1751 This variable conditionally defines HAS_TZNAME if tzname[] is
1752 available to access timezone names.
1753
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1754d_u32align (d_u32align.U):
1755 This variable tells whether you must access character data
1756 through U32-aligned pointers.
1757
1758d_ualarm (d_ualarm.U):
1759 This variable conditionally defines the HAS_UALARM symbol, which
1760 indicates to the C program that the ualarm() routine is available.
1761
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1762d_umask (d_umask.U):
1763 This variable conditionally defines the HAS_UMASK symbol, which
1764 indicates to the C program that the umask() routine is available.
1765 to set and get the value of the file creation mask.
1766
1767d_uname (d_gethname.U):
1768 This variable conditionally defines the HAS_UNAME symbol, which
1769 indicates to the C program that the uname() routine may be
1770 used to derive the host name.
1771
1772d_union_semun (d_union_semun.U):
1773 This variable conditionally defines HAS_UNION_SEMUN if the
1774 union semun is defined by including <sys/sem.h>.
1775
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1776d_usleep (d_usleep.U):
1777 This variable conditionally defines HAS_USLEEP if usleep() is
1778 available to do high granularity sleeps.
1779
5af95cda
JH
1780d_usleepproto (d_usleepproto.U):
1781 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1782 which indicates to the C program that the system provides
1783 a prototype for the usleep() function. Otherwise, it is
1784 up to the program to supply one.
1785
0545a864
JH
1786d_ustat (d_ustat.U):
1787 This variable conditionally defines HAS_USTAT if ustat() is
1788 available to query file system statistics by dev_t.
1789
526fdc24
MS
1790d_vendorarch (vendorarch.U):
1791 This variable conditionally defined PERL_VENDORARCH.
1792
0617aed7
JH
1793d_vendorbin (vendorbin.U):
1794 This variable conditionally defines PERL_VENDORBIN.
1795
a3635516
JH
1796d_vendorlib (vendorlib.U):
1797 This variable conditionally defines PERL_VENDORLIB.
1798
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1799d_vfork (d_vfork.U):
1800 This variable conditionally defines the HAS_VFORK symbol, which
1801 indicates the vfork() routine is available.
1802
1803d_void_closedir (d_closedir.U):
1804 This variable conditionally defines VOID_CLOSEDIR if closedir()
1805 does not return a value.
1806
1807d_voidsig (d_voidsig.U):
1808 This variable conditionally defines VOIDSIG if this system
1809 declares "void (*signal(...))()" in signal.h. The old way was to
1810 declare it as "int (*signal(...))()".
1811
1812d_voidtty (i_sysioctl.U):
1813 This variable conditionally defines USE_IOCNOTTY to indicate that the
1814 ioctl() call with TIOCNOTTY should be used to void tty association.
1815 Otherwise (on USG probably), it is enough to close the standard file
1816 decriptors and do a setpgrp().
1817
1818d_volatile (d_volatile.U):
1819 This variable conditionally defines the HASVOLATILE symbol, which
1820 indicates to the C program that this C compiler knows about the
1821 volatile declaration.
1822
1823d_vprintf (d_vprintf.U):
1824 This variable conditionally defines the HAS_VPRINTF symbol, which
1825 indicates to the C program that the vprintf() routine is available
1826 to printf with a pointer to an argument list.
1827
1828d_wait4 (d_wait4.U):
1829 This variable conditionally defines the HAS_WAIT4 symbol, which
1830 indicates the wait4() routine is available.
1831
1832d_waitpid (d_waitpid.U):
1833 This variable conditionally defines HAS_WAITPID if waitpid() is
1834 available to wait for child process.
1835
1836d_wcstombs (d_wcstombs.U):
1837 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1838 indicates to the C program that the wcstombs() routine is available
1839 to convert wide character strings to multibyte strings.
1840
1841d_wctomb (d_wctomb.U):
1842 This variable conditionally defines the HAS_WCTOMB symbol, which
1843 indicates to the C program that the wctomb() routine is available
1844 to convert a wide character to a multibyte.
1845
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1846d_writev (d_writev.U):
1847 This variable conditionally defines the HAS_WRITEV symbol, which
1848 indicates to the C program that the writev() routine is available.
1849
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1850d_xenix (Guess.U):
1851 This variable conditionally defines the symbol XENIX, which alerts
1852 the C program that it runs under Xenix.
1853
1854date (Loc.U):
5bf26616 1855 This variable is used internally by Configure to determine the
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1856 full pathname (if any) of the date program. After Configure runs,
1857 the value is reset to a plain "date" and is not useful.
1858
1859db_hashtype (i_db.U):
1860 This variable contains the type of the hash structure element
1861 in the <db.h> header file. In older versions of DB, it was
1862 int, while in newer ones it is u_int32_t.
1863
1864db_prefixtype (i_db.U):
1865 This variable contains the type of the prefix structure element
1866 in the <db.h> header file. In older versions of DB, it was
1867 int, while in newer ones it is size_t.
1868
640374d0
JH
1869db_version_major (i_db.U):
1870 This variable contains the major version number of
1871 Berkeley DB found in the <db.h> header file.
1872
1873db_version_minor (i_db.U):
1874 This variable contains the minor version number of
1875 Berkeley DB found in the <db.h> header file.
1876 For DB version 1 this is always 0.
1877
1878db_version_patch (i_db.U):
1879 This variable contains the patch version number of
1880 Berkeley DB found in the <db.h> header file.
1881 For DB version 1 this is always 0.
1882
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1883defvoidused (voidflags.U):
1884 This variable contains the default value of the VOIDUSED symbol (15).
1885
1886direntrytype (i_dirent.U):
1887 This symbol is set to 'struct direct' or 'struct dirent' depending on
1888 whether dirent is available or not. You should use this pseudo type to
1889 portably declare your directory entries.
1890
1891dlext (dlext.U):
1892 This variable contains the extension that is to be used for the
1893 dynamically loaded modules that perl generaties.
1894
1895dlsrc (dlsrc.U):
1896 This variable contains the name of the dynamic loading file that
1897 will be used with the package.
1898
1899doublesize (doublesize.U):
1900 This variable contains the value of the DOUBLESIZE symbol, which
1901 indicates to the C program how many bytes there are in a double.
1902
1903drand01 (randfunc.U):
1904 Indicates the macro to be used to generate normalized
1905 random numbers. Uses randfunc, often divided by
1906 (double) (((unsigned long) 1 << randbits)) in order to
1907 normalize the result.
1908 In C programs, the macro 'Drand01' is mapped to drand01.
1909
1910dynamic_ext (Extensions.U):
1911 This variable holds a list of XS extension files we want to
1912 link dynamically into the package. It is used by Makefile.
1913
1914eagain (nblock_io.U):
1915 This variable bears the symbolic errno code set by read() when no
1916 data is present on the file and non-blocking I/O was enabled (otherwise,
1917 read() blocks naturally).
1918
1919ebcdic (ebcdic.U):
1920 This variable conditionally defines EBCDIC if this
1921 system uses EBCDIC encoding. Among other things, this
1922 means that the character ranges are not contiguous.
1923 See trnl.U
1924
1925echo (Loc.U):
5bf26616 1926 This variable is used internally by Configure to determine the
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1927 full pathname (if any) of the echo program. After Configure runs,
1928 the value is reset to a plain "echo" and is not useful.
1929
1930egrep (Loc.U):
5bf26616 1931 This variable is used internally by Configure to determine the
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1932 full pathname (if any) of the egrep program. After Configure runs,
1933 the value is reset to a plain "egrep" and is not useful.
1934
1935emacs (Loc.U):
1936 This variable is defined but not used by Configure.
1937 The value is a plain '' and is not useful.
1938
1939eunicefix (Init.U):
1940 When running under Eunice this variable contains a command which will
1941 convert a shell script to the proper form of text file for it to be
1942 executable by the shell. On other systems it is a no-op.
1943
1944exe_ext (Unix.U):
1945 This is an old synonym for _exe.
1946
1947expr (Loc.U):
5bf26616 1948 This variable is used internally by Configure to determine the
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1949 full pathname (if any) of the expr program. After Configure runs,
1950 the value is reset to a plain "expr" and is not useful.
1951
1952extensions (Extensions.U):
1953 This variable holds a list of all extension files (both XS and
1954 non-xs linked into the package. It is propagated to Config.pm
1955 and is typically used to test whether a particular extesion
1956 is available.
1957
cb7ddd31
JH
1958extras (Extras.U):
1959 This variable holds a list of extra modules to install.
1960
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1961fflushall (fflushall.U):
1962 This symbol, if defined, tells that to flush
1963 all pending stdio output one must loop through all
1964 the stdio file handles stored in an array and fflush them.
1965 Note that if fflushNULL is defined, fflushall will not
1966 even be probed for and will be left undefined.
1967
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JH
1968fflushNULL (fflushall.U):
1969 This symbol, if defined, tells that fflush(NULL) does flush
1970 all pending stdio output.
1971
781b178c 1972find (Loc.U):
ff935051
JH
1973 This variable is defined but not used by Configure.
1974 The value is a plain '' and is not useful.
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JH
1975
1976firstmakefile (Unix.U):
1977 This variable defines the first file searched by make. On unix,
1978 it is makefile (then Makefile). On case-insensitive systems,
1979 it might be something else. This is only used to deal with
1980 convoluted make depend tricks.
1981
1982flex (Loc.U):
1983 This variable is defined but not used by Configure.
1984 The value is a plain '' and is not useful.
1985
a22e52b9
JH
1986fpossize (fpossize.U):
1987 This variable contains the size of a fpostype in bytes.
1988
781b178c 1989fpostype (fpostype.U):
a22e52b9 1990 This variable defines Fpos_t to be something like fpos_t, long,
781b178c
JH
1991 uint, or whatever type is used to declare file positions in libc.
1992
1993freetype (mallocsrc.U):
1994 This variable contains the return type of free(). It is usually
1995 void, but occasionally int.
1996
5440bc8e
JH
1997from (Cross.U):
1998 This variable contains the command used by Configure
1999 to copy files from the target host. Useful and available
2000 only during Perl build.
2001 The string ':' if not cross-compiling.
2002
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2003full_ar (Loc_ar.U):
2004 This variable contains the full pathname to 'ar', whether or
2005 not the user has specified 'portability'. This is only used
2006 in the Makefile.SH.
2007
2008full_csh (d_csh.U):
2009 This variable contains the full pathname to 'csh', whether or
2010 not the user has specified 'portability'. This is only used
2011 in the compiled C program, and we assume that all systems which
2012 can share this executable will have the same full pathname to
2013 'csh.'
2014
2015full_sed (Loc_sed.U):
2016 This variable contains the full pathname to 'sed', whether or
2017 not the user has specified 'portability'. This is only used
2018 in the compiled C program, and we assume that all systems which
2019 can share this executable will have the same full pathname to
2020 'sed.'
2021
af960fef
JH
2022gccosandvers (gccvers.U):
2023 If GNU cc (gcc) is used, this variable the operating system and
2024 version used to compile the gcc. It is set to '' if not gcc,
2025 or if nothing useful can be parsed as the os version.
2026
2027gccversion (gccvers.U):
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JH
2028 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2029 indicate whether the compiler is version 1 or 2. This is used in
2030 setting some of the default cflags. It is set to '' if not gcc.
2031
a22e52b9
JH
2032gidformat (gidf.U):
2033 This variable contains the format string used for printing a Gid_t.
2034
785fb66b
JH
2035gidsign (gidsign.U):
2036 This variable contains the signedness of a gidtype.
2037 1 for unsigned, -1 for signed.
2038
2039gidsize (gidsize.U):
2040 This variable contains the size of a gidtype in bytes.
2041
781b178c
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2042gidtype (gidtype.U):
2043 This variable defines Gid_t to be something like gid_t, int,
2044 ushort, or whatever type is used to declare the return type
2045 of getgid(). Typically, it is the type of group ids in the kernel.
2046
2047glibpth (libpth.U):
2048 This variable holds the general path (space-separated) used to
2049 find libraries. It may contain directories that do not exist on
2050 this platform, libpth is the cleaned-up version.
2051
2052grep (Loc.U):
5bf26616 2053 This variable is used internally by Configure to determine the
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JH
2054 full pathname (if any) of the grep program. After Configure runs,
2055 the value is reset to a plain "grep" and is not useful.
2056
2057groupcat (nis.U):
2058 This variable contains a command that produces the text of the
2059 /etc/group file. This is normally "cat /etc/group", but can be
2060 "ypcat group" when NIS is used.
aaacdc8b
GS
2061 On some systems, such as os390, there may be no equivalent
2062 command, in which case this variable is unset.
781b178c
JH
2063
2064groupstype (groupstype.U):
2065 This variable defines Groups_t to be something like gid_t, int,
2066 ushort, or whatever type is used for the second argument to
2067 getgroups() and setgroups(). Usually, this is the same as
2068 gidtype (gid_t), but sometimes it isn't.
2069
2070gzip (Loc.U):
5bf26616 2071 This variable is used internally by Configure to determine the
781b178c
JH
2072 full pathname (if any) of the gzip program. After Configure runs,
2073 the value is reset to a plain "gzip" and is not useful.
2074
2075h_fcntl (h_fcntl.U):
2076 This is variable gets set in various places to tell i_fcntl that
2077 <fcntl.h> should be included.
2078
2079h_sysfile (h_sysfile.U):
2080 This is variable gets set in various places to tell i_sys_file that
2081 <sys/file.h> should be included.
2082
2083hint (Oldconfig.U):
2084 Gives the type of hints used for previous answers. May be one of
2085 "default", "recommended" or "previous".
2086
2087hostcat (nis.U):
2088 This variable contains a command that produces the text of the
2089 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2090 "ypcat hosts" when NIS is used.
aaacdc8b
GS
2091 On some systems, such as os390, there may be no equivalent
2092 command, in which case this variable is unset.
781b178c 2093
a22e52b9
JH
2094i16size (perlxv.U):
2095 This variable is the size of an I16 in bytes.
2096
2097i16type (perlxv.U):
2098 This variable contains the C type used for Perl's I16.
2099
2100i32size (perlxv.U):
2101 This variable is the size of an I32 in bytes.
2102
2103i32type (perlxv.U):
2104 This variable contains the C type used for Perl's I32.
2105
2106i64size (perlxv.U):
2107 This variable is the size of an I64 in bytes.
2108
2109i64type (perlxv.U):
2110 This variable contains the C type used for Perl's I64.
2111
2112i8size (perlxv.U):
2113 This variable is the size of an I8 in bytes.
2114
2115i8type (perlxv.U):
2116 This variable contains the C type used for Perl's I8.
2117
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2118i_arpainet (i_arpainet.U):
2119 This variable conditionally defines the I_ARPA_INET symbol,
2120 and indicates whether a C program should include <arpa/inet.h>.
2121
2122i_bsdioctl (i_sysioctl.U):
2123 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2124 indicates to the C program that <sys/bsdioctl.h> exists and should
2125 be included.
2126
2127i_db (i_db.U):
2128 This variable conditionally defines the I_DB symbol, and indicates
2129 whether a C program may include Berkeley's DB include file <db.h>.
2130
2131i_dbm (i_dbm.U):
2132 This variable conditionally defines the I_DBM symbol, which
2133 indicates to the C program that <dbm.h> exists and should
2134 be included.
2135
2136i_dirent (i_dirent.U):
2137 This variable conditionally defines I_DIRENT, which indicates
2138 to the C program that it should include <dirent.h>.
2139
2140i_dld (i_dld.U):
2141 This variable conditionally defines the I_DLD symbol, which
2142 indicates to the C program that <dld.h> (GNU dynamic loading)
2143 exists and should be included.
2144
2145i_dlfcn (i_dlfcn.U):
2146 This variable conditionally defines the I_DLFCN symbol, which
2147 indicates to the C program that <dlfcn.h> exists and should
2148 be included.
2149
2150i_fcntl (i_fcntl.U):
2151 This variable controls the value of I_FCNTL (which tells
2152 the C program to include <fcntl.h>).
2153
2154i_float (i_float.U):
2155 This variable conditionally defines the I_FLOAT symbol, and indicates
2156 whether a C program may include <float.h> to get symbols like DBL_MAX
2157 or DBL_MIN, i.e. machine dependent floating point values.
2158
2159i_gdbm (i_gdbm.U):
2160 This variable conditionally defines the I_GDBM symbol, which
2161 indicates to the C program that <gdbm.h> exists and should
2162 be included.
2163
2164i_grp (i_grp.U):
2165 This variable conditionally defines the I_GRP symbol, and indicates
2166 whether a C program should include <grp.h>.
2167
fe749a9f
JH
2168i_iconv (i_iconv.U):
2169 This variable conditionally defines the I_ICONV symbol, and indicates
2170 whether a C program should include <iconv.h>.
2171
792d8dab
JH
2172i_ieeefp (i_ieeefp.U):
2173 This variable conditionally defines the I_IEEEFP symbol, and indicates
2174 whether a C program should include <ieeefp.h>.
2175
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2176i_inttypes (i_inttypes.U):
2177 This variable conditionally defines the I_INTTYPES symbol,
2178 and indicates whether a C program should include <inttypes.h>.
2179
2765b840
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2180i_langinfo (i_langinfo.U):
2181 This variable conditionally defines the I_LANGINFO symbol,
2182 and indicates whether a C program should include <langinfo.h>.
2183
af960fef
JH
2184i_libutil (i_libutil.U):
2185 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2186 whether a C program should include <libutil.h>.
2187
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2188i_limits (i_limits.U):
2189 This variable conditionally defines the I_LIMITS symbol, and indicates
2190 whether a C program may include <limits.h> to get symbols like WORD_BIT
2191 and friends.
2192
2193i_locale (i_locale.U):
2194 This variable conditionally defines the I_LOCALE symbol,
2195 and indicates whether a C program should include <locale.h>.
2196
2197i_machcthr (i_machcthr.U):
2198 This variable conditionally defines the I_MACH_CTHREADS symbol,
2199 and indicates whether a C program should include <mach/cthreads.h>.
2200
2201i_malloc (i_malloc.U):
2202 This variable conditionally defines the I_MALLOC symbol, and indicates
2203 whether a C program should include <malloc.h>.
2204
2205i_math (i_math.U):
2206 This variable conditionally defines the I_MATH symbol, and indicates
2207 whether a C program may include <math.h>.
2208
2209i_memory (i_memory.U):
2210 This variable conditionally defines the I_MEMORY symbol, and indicates
2211 whether a C program should include <memory.h>.
2212
2213i_mntent (i_mntent.U):
2214 This variable conditionally defines the I_MNTENT symbol, and indicates
2215 whether a C program should include <mntent.h>.
2216
2217i_ndbm (i_ndbm.U):
2218 This variable conditionally defines the I_NDBM symbol, which
2219 indicates to the C program that <ndbm.h> exists and should
2220 be included.
2221
2222i_netdb (i_netdb.U):
2223 This variable conditionally defines the I_NETDB symbol, and indicates
2224 whether a C program should include <netdb.h>.
2225
2226i_neterrno (i_neterrno.U):
2227 This variable conditionally defines the I_NET_ERRNO symbol, which
2228 indicates to the C program that <net/errno.h> exists and should
2229 be included.
2230
2231i_netinettcp (i_netinettcp.U):
2232 This variable conditionally defines the I_NETINET_TCP symbol,
2233 and indicates whether a C program should include <netinet/tcp.h>.
2234
2235i_niin (i_niin.U):
2236 This variable conditionally defines I_NETINET_IN, which indicates
2237 to the C program that it should include <netinet/in.h>. Otherwise,
2238 you may try <sys/in.h>.
2239
2240i_poll (i_poll.U):
2241 This variable conditionally defines the I_POLL symbol, and indicates
2242 whether a C program should include <poll.h>.
2243
3813c136
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2244i_prot (i_prot.U):
2245 This variable conditionally defines the I_PROT symbol, and indicates
2246 whether a C program should include <prot.h>.
2247
781b178c 2248i_pthread (i_pthread.U):
190b66db 2249 This variable conditionally defines the I_PTHREAD symbol,
781b178c
JH
2250 and indicates whether a C program should include <pthread.h>.
2251
2252i_pwd (i_pwd.U):
2253 This variable conditionally defines I_PWD, which indicates
2254 to the C program that it should include <pwd.h>.
2255
2256i_rpcsvcdbm (i_dbm.U):
2257 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2258 indicates to the C program that <rpcsvc/dbm.h> exists and should
2259 be included. Some System V systems might need this instead of <dbm.h>.
2260
2261i_sfio (i_sfio.U):
2262 This variable conditionally defines the I_SFIO symbol,
2263 and indicates whether a C program should include <sfio.h>.
2264
2265i_sgtty (i_termio.U):
2266 This variable conditionally defines the I_SGTTY symbol, which
2267 indicates to the C program that it should include <sgtty.h> rather
2268 than <termio.h>.
2269
2270i_shadow (i_shadow.U):
2271 This variable conditionally defines the I_SHADOW symbol, and indicates
2272 whether a C program should include <shadow.h>.
2273
2274i_socks (i_socks.U):
2275 This variable conditionally defines the I_SOCKS symbol, and indicates
2276 whether a C program should include <socks.h>.
2277
2278i_stdarg (i_varhdr.U):
2279 This variable conditionally defines the I_STDARG symbol, which
2280 indicates to the C program that <stdarg.h> exists and should
2281 be included.
2282
2283i_stddef (i_stddef.U):
2284 This variable conditionally defines the I_STDDEF symbol, which
2285 indicates to the C program that <stddef.h> exists and should
2286 be included.
2287
2288i_stdlib (i_stdlib.U):
2289 This variable conditionally defines the I_STDLIB symbol, which
2290 indicates to the C program that <stdlib.h> exists and should
2291 be included.
2292
2293i_string (i_string.U):
2294 This variable conditionally defines the I_STRING symbol, which
2295 indicates that <string.h> should be included rather than <strings.h>.
2296
792d8dab
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2297i_sunmath (i_sunmath.U):
2298 This variable conditionally defines the I_SUNMATH symbol, and indicates
2299 whether a C program should include <sunmath.h>.
2300
781b178c
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2301i_sysaccess (i_sysaccess.U):
2302 This variable conditionally defines the I_SYS_ACCESS symbol,
2303 and indicates whether a C program should include <sys/access.h>.
2304
2305i_sysdir (i_sysdir.U):
2306 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2307 whether a C program should include <sys/dir.h>.
2308
2309i_sysfile (i_sysfile.U):
2310 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2311 whether a C program should include <sys/file.h> to get R_OK and friends.
2312
2313i_sysfilio (i_sysioctl.U):
2314 This variable conditionally defines the I_SYS_FILIO symbol, which
2315 indicates to the C program that <sys/filio.h> exists and should
2316 be included in preference to <sys/ioctl.h>.
2317
2318i_sysin (i_niin.U):
2319 This variable conditionally defines I_SYS_IN, which indicates
2320 to the C program that it should include <sys/in.h> instead of
2321 <netinet/in.h>.
2322
2323i_sysioctl (i_sysioctl.U):
2324 This variable conditionally defines the I_SYS_IOCTL symbol, which
2325 indicates to the C program that <sys/ioctl.h> exists and should
2326 be included.
2327
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2328i_syslog (i_syslog.U):
2329 This variable conditionally defines the I_SYSLOG symbol,
2330 and indicates whether a C program should include <syslog.h>.
2331
fe749a9f
JH
2332i_sysmman (i_sysmman.U):
2333 This variable conditionally defines the I_SYS_MMAN symbol, and
2334 indicates whether a C program should include <sys/mman.h>.
2335
87b71857
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2336i_sysmode (i_sysmode.U):
2337 This variable conditionally defines the I_SYSMODE symbol,
2338 and indicates whether a C program should include <sys/mode.h>.
2339
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2340i_sysmount (i_sysmount.U):
2341 This variable conditionally defines the I_SYSMOUNT symbol,
2342 and indicates whether a C program should include <sys/mount.h>.
2343
2344i_sysndir (i_sysndir.U):
2345 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2346 whether a C program should include <sys/ndir.h>.
2347
2348i_sysparam (i_sysparam.U):
2349 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2350 whether a C program should include <sys/param.h>.
2351
2352i_sysresrc (i_sysresrc.U):
2353 This variable conditionally defines the I_SYS_RESOURCE symbol,
2354 and indicates whether a C program should include <sys/resource.h>.
2355
2356i_syssecrt (i_syssecrt.U):
2357 This variable conditionally defines the I_SYS_SECURITY symbol,
2358 and indicates whether a C program should include <sys/security.h>.
2359
2360i_sysselct (i_sysselct.U):
2361 This variable conditionally defines I_SYS_SELECT, which indicates
2362 to the C program that it should include <sys/select.h> in order to
2363 get the definition of struct timeval.
2364
2365i_syssockio (i_sysioctl.U):
2366 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2367 C program that socket ioctl codes may be found in <sys/sockio.h>
2368 instead of <sys/ioctl.h>.
2369
2370i_sysstat (i_sysstat.U):
2371 This variable conditionally defines the I_SYS_STAT symbol,
2372 and indicates whether a C program should include <sys/stat.h>.
2373
0545a864
JH
2374i_sysstatfs (i_sysstatfs.U):
2375 This variable conditionally defines the I_SYSSTATFS symbol,
2376 and indicates whether a C program should include <sys/statfs.h>.
2377
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2378i_sysstatvfs (i_sysstatvfs.U):
2379 This variable conditionally defines the I_SYSSTATVFS symbol,
2380 and indicates whether a C program should include <sys/statvfs.h>.
2381
2382i_systime (i_time.U):
2383 This variable conditionally defines I_SYS_TIME, which indicates
2384 to the C program that it should include <sys/time.h>.
2385
2386i_systimek (i_time.U):
2387 This variable conditionally defines I_SYS_TIME_KERNEL, which
2388 indicates to the C program that it should include <sys/time.h>
2389 with KERNEL defined.
2390
2391i_systimes (i_systimes.U):
2392 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2393 whether a C program should include <sys/times.h>.
2394
2395i_systypes (i_systypes.U):
2396 This variable conditionally defines the I_SYS_TYPES symbol,
2397 and indicates whether a C program should include <sys/types.h>.
2398
2399i_sysuio (i_sysuio.U):
2400 This variable conditionally defines the I_SYSUIO symbol, and indicates
2401 whether a C program should include <sys/uio.h>.
2402
2403i_sysun (i_sysun.U):
2404 This variable conditionally defines I_SYS_UN, which indicates
2405 to the C program that it should include <sys/un.h> to get UNIX
2406 domain socket definitions.
2407
d4935d7f
JH
2408i_sysutsname (i_sysutsname.U):
2409 This variable conditionally defines the I_SYSUTSNAME symbol,
2410 and indicates whether a C program should include <sys/utsname.h>.
2411
0545a864
JH
2412i_sysvfs (i_sysvfs.U):
2413 This variable conditionally defines the I_SYSVFS symbol,
2414 and indicates whether a C program should include <sys/vfs.h>.
2415
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2416i_syswait (i_syswait.U):
2417 This variable conditionally defines I_SYS_WAIT, which indicates
2418 to the C program that it should include <sys/wait.h>.
2419
2420i_termio (i_termio.U):
2421 This variable conditionally defines the I_TERMIO symbol, which
2422 indicates to the C program that it should include <termio.h> rather
2423 than <sgtty.h>.
2424
2425i_termios (i_termio.U):
2426 This variable conditionally defines the I_TERMIOS symbol, which
2427 indicates to the C program that the POSIX <termios.h> file is
2428 to be included.
2429
2430i_time (i_time.U):
2431 This variable conditionally defines I_TIME, which indicates
2432 to the C program that it should include <time.h>.
2433
2434i_unistd (i_unistd.U):
2435 This variable conditionally defines the I_UNISTD symbol, and indicates
2436 whether a C program should include <unistd.h>.
2437
0545a864
JH
2438i_ustat (i_ustat.U):
2439 This variable conditionally defines the I_USTAT symbol, and indicates
2440 whether a C program should include <ustat.h>.
2441
781b178c
JH
2442i_utime (i_utime.U):
2443 This variable conditionally defines the I_UTIME symbol, and indicates
2444 whether a C program should include <utime.h>.
2445
2446i_values (i_values.U):
2447 This variable conditionally defines the I_VALUES symbol, and indicates
2448 whether a C program may include <values.h> to get symbols like MAXLONG
2449 and friends.
2450
2451i_varargs (i_varhdr.U):
2452 This variable conditionally defines I_VARARGS, which indicates
2453 to the C program that it should include <varargs.h>.
2454
2455i_varhdr (i_varhdr.U):
2456 Contains the name of the header to be included to get va_dcl definition.
2457 Typically one of varargs.h or stdarg.h.
2458
2459i_vfork (i_vfork.U):
2460 This variable conditionally defines the I_VFORK symbol, and indicates
2461 whether a C program should include vfork.h.
2462
2463ignore_versioned_solibs (libs.U):
2464 This variable should be non-empty if non-versioned shared
2465 libraries (libfoo.so.x.y) are to be ignored (because they
2466 cannot be linked against).
2467
ff935051
JH
2468inc_version_list (inc_version_list.U):
2469 This variable specifies the list of subdirectories in over
2470 which perl.c:incpush() and lib/lib.pm will automatically
3a096bf3
JH
2471 search when adding directories to @INC. The elements in
2472 the list are separated by spaces. This is only useful
ff935051
JH
2473 if you have a perl library directory tree structured like the
2474 default one. See INSTALL for how this works. The versioned
2475 site_perl directory was introduced in 5.005, so that is the
2476 lowest possible value.
2477
3a096bf3
JH
2478inc_version_list_init (inc_version_list.U):
2479 This variable holds the same list as inc_version_list, but
2480 each item is enclosed in double quotes and separated by commas,
2481 suitable for use in the PERL_INC_VERSION_LIST initialization.
2482
781b178c
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2483incpath (usrinc.U):
2484 This variable must preceed the normal include path to get hte
2485 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2486 Value can be "" or "/bsd43" on mips.
2487
2488inews (Loc.U):
2489 This variable is defined but not used by Configure.
2490 The value is a plain '' and is not useful.
2491
2492installarchlib (archlib.U):
2493 This variable is really the same as archlibexp but may differ on
2494 those systems using AFS. For extra portability, only this variable
2495 should be used in makefiles.
2496
2497installbin (bin.U):
2498 This variable is the same as binexp unless AFS is running in which case
2499 the user is explicitely prompted for it. This variable should always
2500 be used in your makefiles for maximum portability.
2501
2502installman1dir (man1dir.U):
2503 This variable is really the same as man1direxp, unless you are using
2504 AFS in which case it points to the read/write location whereas
2505 man1direxp only points to the read-only access location. For extra
2506 portability, you should only use this variable within your makefiles.
2507
2508installman3dir (man3dir.U):
2509 This variable is really the same as man3direxp, unless you are using
2510 AFS in which case it points to the read/write location whereas
2511 man3direxp only points to the read-only access location. For extra
2512 portability, you should only use this variable within your makefiles.
2513
2514installprefix (installprefix.U):
2515 This variable holds the name of the directory below which
2516 "make install" will install the package. For most users, this
2517 is the same as prefix. However, it is useful for
2518 installing the software into a different (usually temporary)
2519 location after which it can be bundled up and moved somehow
2520 to the final location specified by prefix.
2521
2522installprefixexp (installprefix.U):
2523 This variable holds the full absolute path of installprefix
2524 with all ~-expansion done.
2525
2526installprivlib (privlib.U):
2527 This variable is really the same as privlibexp but may differ on
2528 those systems using AFS. For extra portability, only this variable
2529 should be used in makefiles.
2530
2531installscript (scriptdir.U):
2532 This variable is usually the same as scriptdirexp, unless you are on
2533 a system running AFS, in which case they may differ slightly. You
2534 should always use this variable within your makefiles for portability.
2535
2536installsitearch (sitearch.U):
2537 This variable is really the same as sitearchexp but may differ on
2538 those systems using AFS. For extra portability, only this variable
2539 should be used in makefiles.
2540
0617aed7
JH
2541installsitebin (sitebin.U):
2542 This variable is usually the same as sitebinexp, unless you are on
2543 a system running AFS, in which case they may differ slightly. You
2544 should always use this variable within your makefiles for portability.
2545
781b178c
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2546installsitelib (sitelib.U):
2547 This variable is really the same as sitelibexp but may differ on
2548 those systems using AFS. For extra portability, only this variable
2549 should be used in makefiles.
2550
2551installstyle (installstyle.U):
2552 This variable describes the "style" of the perl installation.
2553 This is intended to be useful for tools that need to
2554 manipulate entire perl distributions. Perl itself doesn't use
2555 this to find its libraries -- the library directories are
2556 stored directly in Config.pm. Currently, there are only two
2557 styles: "lib" and "lib/perl5". The default library locations
2558 (e.g. privlib, sitelib) are either $prefix/lib or
2559 $prefix/lib/perl5. The former is useful if $prefix is a
2560 directory dedicated to perl (e.g. /opt/perl), while the latter
2561 is useful if $prefix is shared by many packages, e.g. if
2562 $prefix=/usr/local.
2563 This may later be extended to include other information, so
2564 be careful with pattern-matching on the results.
2565 For compatibility with perl5.005 and earlier, the default
2566 setting is based on whether or not $prefix contains the string
2567 "perl".
2568
2569installusrbinperl (instubperl.U):
2570 This variable tells whether Perl should be installed also as
2571 /usr/bin/perl in addition to
2572 $installbin/perl
2573
526fdc24
MS
2574installvendorarch (vendorarch.U):
2575 This variable is really the same as vendorarchexp but may differ on
2576 those systems using AFS. For extra portability, only this variable
2577 should be used in makefiles.
2578
0617aed7
JH
2579installvendorbin (vendorbin.U):
2580 This variable is really the same as vendorbinexp but may differ on
2581 those systems using AFS. For extra portability, only this variable
2582 should be used in makefiles.
2583
a3635516
JH
2584installvendorlib (vendorlib.U):
2585 This variable is really the same as vendorlibexp but may differ on
2586 those systems using AFS. For extra portability, only this variable
2587 should be used in makefiles.
2588
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2589intsize (intsize.U):
2590 This variable contains the value of the INTSIZE symbol, which
2591 indicates to the C program how many bytes there are in an int.
2592
4b661809 2593issymlink (issymlink.U):
983dbef6
JH
2594 This variable holds the test command to test for a symbolic link
2595 (if they are supported). Typical values include 'test -h' and
2596 'test -L'.
4b661809 2597
a22e52b9
JH
2598ivdformat (perlxvf.U):
2599 This variable contains the format string used for printing
2600 a Perl IV as a signed decimal integer.
2601
2602ivsize (perlxv.U):
2603 This variable is the size of an IV in bytes.
2604
2605ivtype (perlxv.U):
2606 This variable contains the C type used for Perl's IV.
2607
781b178c
JH
2608known_extensions (Extensions.U):
2609 This variable holds a list of all XS extensions included in
2610 the package.
2611
2612ksh (Loc.U):
2613 This variable is defined but not used by Configure.
2614 The value is a plain '' and is not useful.
2615
781b178c
JH
2616ld (dlsrc.U):
2617 This variable indicates the program to be used to link
2618 libraries for dynamic loading. On some systems, it is 'ld'.
2619 On ELF systems, it should be $cc. Mostly, we'll try to respect
2620 the hint file setting.
2621
2622lddlflags (dlsrc.U):
2623 This variable contains any special flags that might need to be
2624 passed to $ld to create a shared library suitable for dynamic
2625 loading. It is up to the makefile to use it. For hpux, it
2626 should be '-b'. For sunos 4.1, it is empty.
2627
2628ldflags (ccflags.U):
2629 This variable contains any additional C loader flags desired by
2630 the user. It is up to the Makefile to use this.
2631
af960fef
JH
2632ldflags_uselargefiles (uselfs.U):
2633 This variable contains the loader flags needed by large file builds
2634 and added to ldflags by hints files.
2635
781b178c
JH
2636ldlibpthname (libperl.U):
2637 This variable holds the name of the shared library
2638 search path, often LD_LIBRARY_PATH. To get an empty
2639 string, the hints file must set this to 'none'.
2640
2641less (Loc.U):
5bf26616 2642 This variable is used internally by Configure to determine the
781b178c
JH
2643 full pathname (if any) of the less program. After Configure runs,
2644 the value is reset to a plain "less" and is not useful.
2645
2646lib_ext (Unix.U):
2647 This is an old synonym for _a.
2648
2649libc (libc.U):
2650 This variable contains the location of the C library.
2651
2652libperl (libperl.U):
2653 The perl executable is obtained by linking perlmain.c with
2654 libperl, any static extensions (usually just DynaLoader),
2655 and any other libraries needed on this system. libperl
2656 is usually libperl.a, but can also be libperl.so.xxx if
2657 the user wishes to build a perl executable with a shared
2658 library.
2659
2660libpth (libpth.U):
2661 This variable holds the general path (space-separated) used to find
2662 libraries. It is intended to be used by other units.
2663
2664libs (libs.U):
2665 This variable holds the additional libraries we want to use.
2666 It is up to the Makefile to deal with it.
2667
fe749a9f
JH
2668libsdirs (libs.U):
2669 This variable holds the directory names aka dirnames of the libraries
2670 we found and accepted, duplicates are removed.
2671
2672libsfiles (libs.U):
2673 This variable holds the filenames aka basenames of the libraries
2674 we found and accepted.
2675
2676libsfound (libs.U):
2677 This variable holds the full pathnames of the libraries
2678 we found and accepted.
2679
13b3f787
JH
2680libspath (libs.U):
2681 This variable holds the directory names probed for libraries.
2682
781b178c
JH
2683libswanted (Myinit.U):
2684 This variable holds a list of all the libraries we want to
2685 search. The order is chosen to pick up the c library
2686 ahead of ucb or bsd libraries for SVR4.
2687
af960fef
JH
2688libswanted_uselargefiles (uselfs.U):
2689 This variable contains the libraries needed by large file builds
2690 and added to ldflags by hints files. It is a space separated list
2691 of the library names without the "lib" prefix or any suffix, just
2692 like libswanted..
2693
781b178c 2694line (Loc.U):
ff935051
JH
2695 This variable is defined but not used by Configure.
2696 The value is a plain '' and is not useful.
781b178c
JH
2697
2698lint (Loc.U):
2699 This variable is defined but not used by Configure.
2700 The value is a plain '' and is not useful.
2701
2702lkflags (ccflags.U):
2703 This variable contains any additional C partial linker flags desired by
2704 the user. It is up to the Makefile to use this.
2705
2706ln (Loc.U):
5bf26616 2707 This variable is used internally by Configure to determine the
781b178c
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2708 full pathname (if any) of the ln program. After Configure runs,
2709 the value is reset to a plain "ln" and is not useful.
2710
2711lns (lns.U):
2712 This variable holds the name of the command to make
2713 symbolic links (if they are supported). It can be used
2714 in the Makefile. It is either 'ln -s' or 'ln'
2715
2716locincpth (ccflags.U):
2717 This variable contains a list of additional directories to be
2718 searched by the compiler. The appropriate '-I' directives will
2719 be added to ccflags. This is intended to simplify setting
2720 local directories from the Configure command line.
2721 It's not much, but it parallels the loclibpth stuff in libpth.U.
2722
2723loclibpth (libpth.U):
2724 This variable holds the paths (space-separated) used to find local
2725 libraries. It is prepended to libpth, and is intended to be easily
2726 set from the command line.
2727
2728longdblsize (d_longdbl.U):
2729 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2730 indicates to the C program how many bytes there are in a long double,
2731 if this system supports long doubles.
2732
2733longlongsize (d_longlong.U):
2734 This variable contains the value of the LONGLONGSIZE symbol, which
2735 indicates to the C program how many bytes there are in a long long,
2736 if this system supports long long.
2737
2738longsize (intsize.U):
2739 This variable contains the value of the LONGSIZE symbol, which
2740 indicates to the C program how many bytes there are in a long.
2741
2742lp (Loc.U):
2743 This variable is defined but not used by Configure.
2744 The value is a plain '' and is not useful.
2745
2746lpr (Loc.U):
2747 This variable is defined but not used by Configure.
2748 The value is a plain '' and is not useful.
2749
2750ls (Loc.U):
5bf26616 2751 This variable is used internally by Configure to determine the
781b178c
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2752 full pathname (if any) of the ls program. After Configure runs,
2753 the value is reset to a plain "ls" and is not useful.
2754
2755lseeksize (lseektype.U):
2756 This variable defines lseektype to be something like off_t, long,
2757 or whatever type is used to declare lseek offset's type in the
2758 kernel (which also appears to be lseek's return type).
2759
2760lseektype (lseektype.U):
2761 This variable defines lseektype to be something like off_t, long,
2762 or whatever type is used to declare lseek offset's type in the
2763 kernel (which also appears to be lseek's return type).
2764
2765mail (Loc.U):
2766 This variable is defined but not used by Configure.
2767 The value is a plain '' and is not useful.
2768
2769mailx (Loc.U):
2770 This variable is defined but not used by Configure.
2771 The value is a plain '' and is not useful.
2772
2773make (Loc.U):
5bf26616 2774 This variable is used internally by Configure to determine the
781b178c
JH
2775 full pathname (if any) of the make program. After Configure runs,
2776 the value is reset to a plain "make" and is not useful.
2777
2778make_set_make (make.U):
2779 Some versions of 'make' set the variable MAKE. Others do not.
2780 This variable contains the string to be included in Makefile.SH
2781 so that MAKE is set if needed, and not if not needed.
2782 Possible values are:
2783 make_set_make='#' # If your make program handles this for you,
2784 make_set_make="MAKE=$make" # if it doesn't.
2785 I used a comment character so that we can distinguish a
2786 'set' value (from a previous config.sh or Configure '-D' option)
2787 from an uncomputed value.
2788
2789mallocobj (mallocsrc.U):
2790 This variable contains the name of the malloc.o that this package
2791 generates, if that malloc.o is preferred over the system malloc.
2792 Otherwise the value is null. This variable is intended for generating
2793 Makefiles. See mallocsrc.
2794
2795mallocsrc (mallocsrc.U):
2796 This variable contains the name of the malloc.c that comes with
2797 the package, if that malloc.c is preferred over the system malloc.
2798 Otherwise the value is null. This variable is intended for generating
2799 Makefiles.
2800
2801malloctype (mallocsrc.U):
2802 This variable contains the kind of ptr returned by malloc and realloc.
2803
2804man1dir (man1dir.U):
2805 This variable contains the name of the directory in which manual
2806 source pages are to be put. It is the responsibility of the
2807 Makefile.SH to get the value of this into the proper command.
2808 You must be prepared to do the ~name expansion yourself.
2809
2810man1direxp (man1dir.U):
2811 This variable is the same as the man1dir variable, but is filename
2812 expanded at configuration time, for convenient use in makefiles.
2813
2814man1ext (man1dir.U):
2815 This variable contains the extension that the manual page should
2816 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2817 See man1dir.
2818
2819man3dir (man3dir.U):
2820 This variable contains the name of the directory in which manual
2821 source pages are to be put. It is the responsibility of the
2822 Makefile.SH to get the value of this into the proper command.
2823 You must be prepared to do the ~name expansion yourself.
2824
2825man3direxp (man3dir.U):
2826 This variable is the same as the man3dir variable, but is filename
2827 expanded at configuration time, for convenient use in makefiles.
2828
2829man3ext (man3dir.U):
2830 This variable contains the extension that the manual page should
2831 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2832 See man3dir.
2833
ff935051
JH
2834Mcc (Loc.U):
2835 This variable is used internally by Configure to determine the
2836 full pathname (if any) of the Mcc program. After Configure runs,
2837 the value is reset to a plain "Mcc" and is not useful.
2838
781b178c
JH
2839mips_type (usrinc.U):
2840 This variable holds the environment type for the mips system.
2841 Possible values are "BSD 4.3" and "System V".
2842
2843mkdir (Loc.U):
5bf26616 2844 This variable is used internally by Configure to determine the
781b178c
JH
2845 full pathname (if any) of the mkdir program. After Configure runs,
2846 the value is reset to a plain "mkdir" and is not useful.
2847
fe749a9f
JH
2848mmaptype (d_mmap.U):
2849 This symbol contains the type of pointer returned by mmap()
2850 (and simultaneously the type of the first argument).
2851 It can be 'void *' or 'caddr_t'.
2852
781b178c
JH
2853modetype (modetype.U):
2854 This variable defines modetype to be something like mode_t,
2855 int, unsigned short, or whatever type is used to declare file
2856 modes for system calls.
2857
2858more (Loc.U):
5bf26616 2859 This variable is used internally by Configure to determine the
781b178c
JH
2860 full pathname (if any) of the more program. After Configure runs,
2861 the value is reset to a plain "more" and is not useful.
2862
2863multiarch (multiarch.U):
2864 This variable conditionally defines the MULTIARCH symbol
2865 which signifies the presence of multiplatform files.
2866 This is normally set by hints files.
2867
2868mv (Loc.U):
2869 This variable is defined but not used by Configure.
2870 The value is a plain '' and is not useful.
2871
2872myarchname (archname.U):
2873 This variable holds the architecture name computed by Configure in
2874 a previous run. It is not intended to be perused by any user and
2875 should never be set in a hint file.
2876
2877mydomain (myhostname.U):
2878 This variable contains the eventual value of the MYDOMAIN symbol,
2879 which is the domain of the host the program is going to run on.
2880 The domain must be appended to myhostname to form a complete host name.
2881 The dot comes with mydomain, and need not be supplied by the program.
2882
2883myhostname (myhostname.U):
2884 This variable contains the eventual value of the MYHOSTNAME symbol,
2885 which is the name of the host the program is going to run on.
2886 The domain is not kept with hostname, but must be gotten from mydomain.
2887 The dot comes with mydomain, and need not be supplied by the program.
2888
2889myuname (Oldconfig.U):
2890 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2891 pseudo variables assignments in the output are stripped, thank you. The
2892 whole thing is then lower-cased.
2893
2894n (n.U):
2895 This variable contains the '-n' flag if that is what causes the echo
2896 command to suppress newline. Otherwise it is null. Correct usage is
2897 $echo $n "prompt for a question: $c".
2898
2cc61e15
DD
2899need_va_copy (need_va_copy.U):
2900 This symbol, if defined, indicates that the system stores
2901 the variable argument list datatype, va_list, in a format
2902 that cannot be copied by simple assignment, so that some
2903 other means must be used when copying is required.
2904 As such systems vary in their provision (or non-provision)
2905 of copying mechanisms, handy.h defines a platform-
2906 independent macro, Perl_va_copy(src, dst), to do the job.
2907
781b178c
JH
2908netdb_hlen_type (netdbtype.U):
2909 This variable holds the type used for the 2nd argument to
2910 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2911 This is only useful if you have gethostbyaddr(), naturally.
2912
2913netdb_host_type (netdbtype.U):
2914 This variable holds the type used for the 1st argument to
2915 gethostbyaddr(). Usually, this is char * or void *, possibly
2916 with or without a const prefix.
2917 This is only useful if you have gethostbyaddr(), naturally.
2918
2919netdb_name_type (netdbtype.U):
2920 This variable holds the type used for the argument to
2921 gethostbyname(). Usually, this is char * or const char *.
2922 This is only useful if you have gethostbyname(), naturally.
2923
2924netdb_net_type (netdbtype.U):
2925 This variable holds the type used for the 1st argument to
2926 getnetbyaddr(). Usually, this is int or long.
2927 This is only useful if you have getnetbyaddr(), naturally.
2928
2929nm (Loc.U):
5bf26616 2930 This variable is used internally by Configure to determine the
781b178c
JH
2931 full pathname (if any) of the nm program. After Configure runs,
2932 the value is reset to a plain "nm" and is not useful.
2933
2934nm_opt (usenm.U):
2935 This variable holds the options that may be necessary for nm.
2936
2937nm_so_opt (usenm.U):
2938 This variable holds the options that may be necessary for nm
2939 to work on a shared library but that can not be used on an
2940 archive library. Currently, this is only used by Linux, where
2941 nm --dynamic is *required* to get symbols from an ELF library which
2942 has been stripped, but nm --dynamic is *fatal* on an archive library.
2943 Maybe Linux should just always set usenm=false.
2944
2945nonxs_ext (Extensions.U):
2946 This variable holds a list of all non-xs extensions included
2947 in the package. All of them will be built.
2948
2949nroff (Loc.U):
5bf26616 2950 This variable is used internally by Configure to determine the
781b178c
JH
2951 full pathname (if any) of the nroff program. After Configure runs,
2952 the value is reset to a plain "nroff" and is not useful.
2953
6b4667fc
A
2954nveformat (perlxvf.U):
2955 This variable contains the format string used for printing
2956 a Perl NV using %e-ish floating point format.
2957
6b356c8e 2958nvEUformat (perlxvf.U):
6b4667fc
A
2959 This variable contains the format string used for printing
2960 a Perl NV using %E-ish floating point format.
2961
2962nvfformat (perlxvf.U):
2963 This variable confains the format string used for printing
2964 a Perl NV using %f-ish floating point format.
2965
6b356c8e 2966nvFUformat (perlxvf.U):
6b4667fc
A
2967 This variable confains the format string used for printing
2968 a Perl NV using %F-ish floating point format.
2969
2970nvgformat (perlxvf.U):
2971 This variable contains the format string used for printing
2972 a Perl NV using %g-ish floating point format.
2973
6b356c8e 2974nvGUformat (perlxvf.U):
6b4667fc
A
2975 This variable contains the format string used for printing
2976 a Perl NV using %G-ish floating point format.
2977
a22e52b9
JH
2978nvsize (perlxv.U):
2979 This variable is the size of an NV in bytes.
2980
2981nvtype (perlxv.U):
2982 This variable contains the C type used for Perl's NV.
2983
781b178c
JH
2984o_nonblock (nblock_io.U):
2985 This variable bears the symbol value to be used during open() or fcntl()
2986 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2987 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2988 but that is only supported by some devices.
2989
2990obj_ext (Unix.U):
2991 This is an old synonym for _o.
2992
2993old_pthread_create_joinable (d_pthrattrj.U):
2994 This variable defines the constant to use for creating joinable
2995 (aka undetached) pthreads. Unused if pthread.h defines
2996 PTHREAD_CREATE_JOINABLE. If used, possible values are
2997 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2998
2999optimize (ccflags.U):
3000 This variable contains any optimizer/debugger flag that should be used.
3001 It is up to the Makefile to use it.
3002
3003orderlib (orderlib.U):
3004 This variable is "true" if the components of libraries must be ordered
3005 (with `lorder $* | tsort`) before placing them in an archive. Set to
3006 "false" if ranlib or ar can generate random libraries.
3007
3008osname (Oldconfig.U):
3009 This variable contains the operating system name (e.g. sunos,
3010 solaris, hpux, etc.). It can be useful later on for setting
3011 defaults. Any spaces are replaced with underscores. It is set
3012 to a null string if we can't figure it out.
3013
3014osvers (Oldconfig.U):
3015 This variable contains the operating system version (e.g.
3016 4.1.3, 5.2, etc.). It is primarily used for helping select
3017 an appropriate hints file, but might be useful elsewhere for
3018 setting defaults. It is set to '' if we can't figure it out.
3019 We try to be flexible about how much of the version number
3020 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3021 same for this package, hints files might just be os_4.0 or
3022 os_4.1, etc., not keeping separate files for each little release.
3023
3b777bb4
GS
3024otherlibdirs (otherlibdirs.U):
3025 This variable contains a colon-separated set of paths for the perl
3026 binary to search for additional library files or modules.
3027 These directories will be tacked to the end of @INC.
3028 Perl will automatically search below each path for version-
3029 and architecture-specific directories. See inc_version_list
3030 for more details.
3031 A value of ' ' means 'none' and is used to preserve this value
3032 for the next run through Configure.
3033
781b178c
JH
3034package (package.U):
3035 This variable contains the name of the package being constructed.
3036 It is primarily intended for the use of later Configure units.
3037
3038pager (pager.U):
3039 This variable contains the name of the preferred pager on the system.
3040 Usual values are (the full pathnames of) more, less, pg, or cat.
3041
3042passcat (nis.U):
3043 This variable contains a command that produces the text of the
3044 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3045 "ypcat passwd" when NIS is used.
aaacdc8b
GS
3046 On some systems, such as os390, there may be no equivalent
3047 command, in which case this variable is unset.
781b178c
JH
3048
3049patchlevel (patchlevel.U):
3050 The patchlevel level of this package.
3051 The value of patchlevel comes from the patchlevel.h file.
ff935051 3052 In a version number such as 5.6.1, this is the "6".
c890dc6c 3053 In patchlevel.h, this is referred to as "PERL_VERSION".
781b178c
JH
3054
3055path_sep (Unix.U):
3056 This is an old synonym for p_ in Head.U, the character
3057 used to separate elements in the command shell search PATH.
3058
c890dc6c
JH
3059perl5 (perl5.U):
3060 This variable contains the full path (if any) to a previously
3061 installed perl5.005 or later suitable for running the script
3062 to determine inc_version_list.
3063
781b178c 3064perl (Loc.U):
c890dc6c
JH
3065 This variable is defined but not used by Configure.
3066 The value is a plain '' and is not useful.
781b178c 3067
a6d26a0d
JH
3068perl_patchlevel (patchlevel.U):
3069 This is the Perl patch level, a numeric change identifier,
3070 as defined by whichever source code maintenance system
3071 is used to maintain the patches; currently Perforce.
3072 It does not correlate with the Perl version numbers or
3073 the maintenance versus development dichotomy except
3074 by also being increasing.
3075
ff935051
JH
3076PERL_REVISION (Oldsyms.U):
3077 In a Perl version number such as 5.6.2, this is the 5.
3078 This value is manually set in patchlevel.h
3079
3080PERL_SUBVERSION (Oldsyms.U):
3081 In a Perl version number such as 5.6.2, this is the 2.
3082 Values greater than 50 represent potentially unstable
3083 development subversions.
3084 This value is manually set in patchlevel.h
3085
3086PERL_VERSION (Oldsyms.U):
3087 In a Perl version number such as 5.6.2, this is the 6.
3088 This value is manually set in patchlevel.h
3089
781b178c
JH
3090perladmin (perladmin.U):
3091 Electronic mail address of the perl5 administrator.
3092
b7a73309
JH
3093perllibs (End.U):
3094 The list of libraries needed by Perl only (any libraries needed
3095 by extensions only will by dropped, if using dynamic loading).
3096
781b178c
JH
3097perlpath (perlpath.U):
3098 This variable contains the eventual value of the PERLPATH symbol,
3099 which contains the name of the perl interpreter to be used in
3100 shell scripts and in the "eval 'exec'" idiom.
3101
3102pg (Loc.U):
5bf26616 3103 This variable is used internally by Configure to determine the
781b178c
JH
3104 full pathname (if any) of the pg program. After Configure runs,
3105 the value is reset to a plain "pg" and is not useful.
3106
3107phostname (myhostname.U):
3108 This variable contains the eventual value of the PHOSTNAME symbol,
3109 which is a command that can be fed to popen() to get the host name.
3110 The program should probably not presume that the domain is or isn't
3111 there already.
3112
3113pidtype (pidtype.U):
3114 This variable defines PIDTYPE to be something like pid_t, int,
3115 ushort, or whatever type is used to declare process ids in the kernel.
3116
3117plibpth (libpth.U):
3118 Holds the private path used by Configure to find out the libraries.
3119 Its value is prepend to libpth. This variable takes care of special
3120 machines, like the mips. Usually, it should be empty.
3121
fe749a9f
JH
3122pm_apiversion (xs_apiversion.U):
3123 This variable contains the version of the oldest perl
3124 compatible with the present perl. (That is, pure perl modules
3125 written for $pm_apiversion will still work for the current
3126 version). perl.c:incpush() and lib/lib.pm will automatically
3127 search in $sitelib for older directories across major versions
3128 back to pm_apiversion. This is only useful if you have a perl
3129 library directory tree structured like the default one. The
3130 versioned site_perl library was introduced in 5.005, so that's
3131 the default setting for this variable. It's hard to imagine
3132 it changing before Perl6. It is included here for symmetry
3133 with xs_apiveprsion -- the searching algorithms will
3134 (presumably) be similar.
3135 See the INSTALL file for how this works.
3136
781b178c
JH
3137pmake (Loc.U):
3138 This variable is defined but not used by Configure.
3139 The value is a plain '' and is not useful.
3140
3141pr (Loc.U):
3142 This variable is defined but not used by Configure.
3143 The value is a plain '' and is not useful.
3144
3145prefix (prefix.U):
3146 This variable holds the name of the directory below which the
3147 user will install the package. Usually, this is /usr/local, and
3148 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3149 man pages in /usr/local/man, etc. It is only used to set defaults
3150 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3151
3152prefixexp (prefix.U):
3153 This variable holds the full absolute path of the directory below
3154 which the user will install the package. Derived from prefix.
3155
3156privlib (privlib.U):
3157 This variable contains the eventual value of the PRIVLIB symbol,
3158 which is the name of the private library for this package. It may
3159 have a ~ on the front. It is up to the makefile to eventually create
3160 this directory while performing installation (with ~ substitution).
3161
3162privlibexp (privlib.U):
3163 This variable is the ~name expanded version of privlib, so that you
3164 may use it directly in Makefiles or shell scripts.
3165
3166prototype (prototype.U):
3167 This variable holds the eventual value of CAN_PROTOTYPE, which
3168 indicates the C compiler can handle funciton prototypes.
3169
3170ptrsize (ptrsize.U):
3171 This variable contains the value of the PTRSIZE symbol, which
3172 indicates to the C program how many bytes there are in a pointer.
3173
e0a10278 3174quadkind (quadtype.U):
0befd8de
JH
3175 This variable, if defined, encodes the type of a quad:
3176 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3177
3178quadtype (quadtype.U):
3179 This variable defines Quad_t to be something like long, int,
3180 long long, int64_t, or whatever type is used for 64-bit integers.
3181
781b178c
JH
3182randbits (randfunc.U):
3183 Indicates how many bits are produced by the function used to
3184 generate normalized random numbers.
3185
3186randfunc (randfunc.U):
3187 Indicates the name of the random number function to use.
3188 Values include drand48, random, and rand. In C programs,
3189 the 'Drand01' macro is defined to generate uniformly distributed
3190 random numbers over the range [0., 1.[ (see drand01 and nrand).
3191
3192randseedtype (randfunc.U):
3193 Indicates the type of the argument of the seedfunc.
3194
3195ranlib (orderlib.U):
3196 This variable is set to the pathname of the ranlib program, if it is
3197 needed to generate random libraries. Set to ":" if ar can generate
3198 random libraries or if random libraries are not supported
3199
3200rd_nodata (nblock_io.U):
3201 This variable holds the return code from read() when no data is
3202 present. It should be -1, but some systems return 0 when O_NDELAY is
3203 used, which is a shame because you cannot make the difference between
3204 no data and an EOF.. Sigh!
3205
c890dc6c
JH
3206revision (patchlevel.U):
3207 The value of revision comes from the patchlevel.h file.
3208 In a version number such as 5.6.1, this is the "5".
3209 In patchlevel.h, this is referred to as "PERL_REVISION".
3210
781b178c 3211rm (Loc.U):
5bf26616 3212 This variable is used internally by Configure to determine the
781b178c
JH
3213 full pathname (if any) of the rm program. After Configure runs,
3214 the value is reset to a plain "rm" and is not useful.
3215
3216rmail (Loc.U):
3217 This variable is defined but not used by Configure.
3218 The value is a plain '' and is not useful.
3219
5440bc8e
JH
3220run (Cross.U):
3221 This variable contains the command used by Configure
3222 to copy and execute a cross-compiled executable in the
3223 target host. Useful and available only during Perl build.
3224 Empty string '' if not cross-compiling.
3225
781b178c
JH
3226runnm (usenm.U):
3227 This variable contains 'true' or 'false' depending whether the
3228 nm extraction should be performed or not, according to the value
3229 of usenm and the flags on the Configure command line.
3230
3231sched_yield (d_pthread_y.U):
3232 This variable defines the way to yield the execution
3233 of the current thread.
3234
3235scriptdir (scriptdir.U):
3236 This variable holds the name of the directory in which the user wants
3237 to put publicly scripts for the package in question. It is either
3238 the same directory as for binaries, or a special one that can be
3239 mounted across different architectures, like /usr/share. Programs
3240 must be prepared to deal with ~name expansion.
3241
3242scriptdirexp (scriptdir.U):
3243 This variable is the same as scriptdir, but is filename expanded
3244 at configuration time, for programs not wanting to bother with it.
3245
3246sed (Loc.U):
5bf26616 3247 This variable is used internally by Configure to determine the
781b178c
JH
3248 full pathname (if any) of the sed program. After Configure runs,
3249 the value is reset to a plain "sed" and is not useful.
3250
3251seedfunc (randfunc.U):
3252 Indicates the random number generating seed function.
3253 Values include srand48, srandom, and srand.
3254
3255selectminbits (selectminbits.U):
3256 This variable holds the minimum number of bits operated by select.
3257 That is, if you do select(n, ...), how many bits at least will be
3258 cleared in the masks if some activity is detected. Usually this
3259 is either n or 32*ceil(n/32), especially many little-endians do
3260 the latter. This is only useful if you have select(), naturally.
3261
3262selecttype (selecttype.U):
3263 This variable holds the type used for the 2nd, 3rd, and 4th
3264 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3265 is defined, and 'int *' otherwise. This is only useful if you
3266 have select(), naturally.
3267
3268sendmail (Loc.U):
ff935051
JH
3269 This variable is defined but not used by Configure.
3270 The value is a plain '' and is not useful.
781b178c
JH
3271
3272sh (sh.U):
3273 This variable contains the full pathname of the shell used
3274 on this system to execute Bourne shell scripts. Usually, this will be
3275 /bin/sh, though it's possible that some systems will have /bin/ksh,
3276 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3277 D:/bin/sh.exe.
3278 This unit comes before Options.U, so you can't set sh with a '-D'
3279 option, though you can override this (and startsh)
3280 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3281
3282shar (Loc.U):
3283 This variable is defined but not used by Configure.
3284 The value is a plain '' and is not useful.
3285
3286sharpbang (spitshell.U):
3287 This variable contains the string #! if this system supports that
3288 construct.
3289
3290shmattype (d_shmat.U):
3291 This symbol contains the type of pointer returned by shmat().
3292 It can be 'void *' or 'char *'.
3293
3294shortsize (intsize.U):
3295 This variable contains the value of the SHORTSIZE symbol which
3296 indicates to the C program how many bytes there are in a short.
3297
3298shrpenv (libperl.U):
3299 If the user builds a shared libperl.so, then we need to tell the
3300 'perl' executable where it will be able to find the installed libperl.so.
3301 One way to do this on some systems is to set the environment variable
3302 LD_RUN_PATH to the directory that will be the final location of the
3303 shared libperl.so. The makefile can use this with something like
3304 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3305 Typical values are
3306 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3307 or
3308 shrpenv=''
3309 See the main perl Makefile.SH for actual working usage.
3310 Alternatively, we might be able to use a command line option such
3311 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3312 $archlibexp/CORE (Linux).
3313
3314shsharp (spitshell.U):
3315 This variable tells further Configure units whether your sh can
3316 handle # comments.
3317
3318sig_count (sig_name.U):
3319 This variable holds a number larger than the largest valid
3320 signal number. This is usually the same as the NSIG macro.
3321
3322sig_name (sig_name.U):
3323 This variable holds the signal names, space separated. The leading
3324 SIG in signal name is removed. A ZERO is prepended to the
3325 list. This is currently not used.
3326
3327sig_name_init (sig_name.U):
3328 This variable holds the signal names, enclosed in double quotes and
3329 separated by commas, suitable for use in the SIG_NAME definition
3330 below. A "ZERO" is prepended to the list, and the list is
3331 terminated with a plain 0. The leading SIG in signal names
3332 is removed. See sig_num.
3333
3334sig_num (sig_name.U):
3335 This variable holds the signal numbers, space separated. A ZERO is
3336 prepended to the list (corresponding to the fake SIGZERO), and
3337 the list is terminated with a 0. Those numbers correspond to
3338 the value of the signal listed in the same place within the
3339 sig_name list.
3340
3341sig_num_init (sig_name.U):
3342 This variable holds the signal numbers, enclosed in double quotes and
3343 separated by commas, suitable for use in the SIG_NUM definition
3344 below. A "ZERO" is prepended to the list, and the list is
3345 terminated with a plain 0.
3346
76d3c696
JH
3347sig_size (sig_name.U):
3348 This variable contains the number of elements of the sig_name
8966e0c4 3349 and sig_num arrays, excluding the final NULL entry.
76d3c696 3350
781b178c
JH
3351signal_t (d_voidsig.U):
3352 This variable holds the type of the signal handler (void or int).
3353
3354sitearch (sitearch.U):
3355 This variable contains the eventual value of the SITEARCH symbol,
3356 which is the name of the private library for this package. It may
3357 have a ~ on the front. It is up to the makefile to eventually create
3358 this directory while performing installation (with ~ substitution).
f868067f
JH
3359 The standard distribution will put nothing in this directory.
3360 After perl has been installed, users may install their own local
3361 architecture-dependent modules in this directory with
3362 MakeMaker Makefile.PL
3363 or equivalent. See INSTALL for details.
781b178c
JH
3364
3365sitearchexp (sitearch.U):
3366 This variable is the ~name expanded version of sitearch, so that you
3367 may use it directly in Makefiles or shell scripts.
3368
0617aed7
JH
3369sitebin (sitebin.U):
3370 This variable holds the name of the directory in which the user wants
3371 to put add-on publicly executable files for the package in question. It
3372 is most often a local directory such as /usr/local/bin. Programs using
3373 this variable must be prepared to deal with ~name substitution.
f868067f
JH
3374 The standard distribution will put nothing in this directory.
3375 After perl has been installed, users may install their own local
3376 executables in this directory with
3377 MakeMaker Makefile.PL
3378 or equivalent. See INSTALL for details.
0617aed7
JH
3379
3380sitebinexp (sitebin.U):
3381 This is the same as the sitebin variable, but is filename expanded at
3382 configuration time, for use in your makefiles.
3383
781b178c
JH
3384sitelib (sitelib.U):
3385 This variable contains the eventual value of the SITELIB symbol,
3386 which is the name of the private library for this package. It may
3387 have a ~ on the front. It is up to the makefile to eventually create
3388 this directory while performing installation (with ~ substitution).
f868067f
JH
3389 The standard distribution will put nothing in this directory.
3390 After perl has been installed, users may install their own local
3391 architecture-independent modules in this directory with
3392 MakeMaker Makefile.PL
3393 or equivalent. See INSTALL for details.
781b178c 3394
526fdc24
MS
3395sitelib_stem (sitelib.U):
3396 This variable is $sitelibexp with any trailing version-specific component
3397 removed. The elements in inc_version_list (inc_version_list.U) can
3398 be tacked onto this variable to generate a list of directories to search.
3399
781b178c
JH
3400sitelibexp (sitelib.U):
3401 This variable is the ~name expanded version of sitelib, so that you
3402 may use it directly in Makefiles or shell scripts.
3403
3404siteprefix (siteprefix.U):
3405 This variable holds the full absolute path of the directory below
3406 which the user will install add-on packages.
f868067f 3407 See INSTALL for usage and examples.
781b178c
JH
3408
3409siteprefixexp (siteprefix.U):
3410 This variable holds the full absolute path of the directory below
3411 which the user will install add-on packages. Derived from siteprefix.
3412
a13ea748
JH
3413sizesize (sizesize.U):
3414 This variable contains the size of a sizetype in bytes.
3415
781b178c
JH
3416sizetype (sizetype.U):
3417 This variable defines sizetype to be something like size_t,
3418 unsigned long, or whatever type is used to declare length
3419 parameters for string functions.
3420
3421sleep (Loc.U):
3422 This variable is defined but not used by Configure.
3423 The value is a plain '' and is not useful.
3424
3425smail (Loc.U):
3426 This variable is defined but not used by Configure.
3427 The value is a plain '' and is not useful.
3428
781b178c
JH
3429so (so.U):
3430 This variable holds the extension used to identify shared libraries
3431 (also known as shared objects) on the system. Usually set to 'so'.
3432
3433sockethdr (d_socket.U):
3434 This variable has any cpp '-I' flags needed for socket support.
3435
3436socketlib (d_socket.U):
3437 This variable has the names of any libraries needed for socket support.
3438
c890dc6c
JH
3439socksizetype (socksizetype.U):
3440 This variable holds the type used for the size argument
3441 for various socket calls like accept. Usual values include
3442 socklen_t, size_t, and int.
3443
781b178c 3444sort (Loc.U):
5bf26616 3445 This variable is used internally by Configure to determine the
781b178c
JH
3446 full pathname (if any) of the sort program. After Configure runs,
3447 the value is reset to a plain "sort" and is not useful.
3448
3449spackage (package.U):
3450 This variable contains the name of the package being constructed,
3451 with the first letter uppercased, i.e. suitable for starting
3452 sentences.
3453
3454spitshell (spitshell.U):
3455 This variable contains the command necessary to spit out a runnable
3456 shell on this system. It is either cat or a grep '-v' for # comments.
3457
ff935051
JH
3458sPRId64 (quadfio.U):
3459 This variable, if defined, contains the string used by stdio to
3460 format 64-bit decimal numbers (format 'd') for output.
3461
3462sPRIeldbl (longdblfio.U):
3463 This variable, if defined, contains the string used by stdio to
3464 format long doubles (format 'e') for output.
3465
6b356c8e 3466sPRIEUldbl (longdblfio.U):
ff935051
JH
3467 This variable, if defined, contains the string used by stdio to
3468 format long doubles (format 'E') for output.
6b356c8e
JH
3469 The 'U' in the name is to separate this from sPRIeldbl so that even
3470 case-blind systems can see the difference.
ff935051
JH
3471
3472sPRIfldbl (longdblfio.U):
3473 This variable, if defined, contains the string used by stdio to
3474 format long doubles (format 'f') for output.
3475
6b356c8e 3476sPRIFUldbl (longdblfio.U):
ff935051
JH
3477 This variable, if defined, contains the string used by stdio to
3478 format long doubles (format 'F') for output.
6b356c8e
JH
3479 The 'U' in the name is to separate this from sPRIfldbl so that even
3480 case-blind systems can see the difference.
ff935051
JH
3481
3482sPRIgldbl (longdblfio.U):
3483 This variable, if defined, contains the string used by stdio to
3484 format long doubles (format 'g') for output.
3485
6b356c8e 3486sPRIGUldbl (longdblfio.U):
ff935051
JH
3487 This variable, if defined, contains the string used by stdio to
3488 format long doubles (format 'G') for output.
6b356c8e
JH
3489 The 'U' in the name is to separate this from sPRIgldbl so that even
3490 case-blind systems can see the difference.
ff935051
JH
3491
3492sPRIi64 (quadfio.U):
3493 This variable, if defined, contains the string used by stdio to
3494 format 64-bit decimal numbers (format 'i') for output.
3495
3496sPRIo64 (quadfio.U):
3497 This variable, if defined, contains the string used by stdio to
3498 format 64-bit octal numbers (format 'o') for output.
3499
3500sPRIu64 (quadfio.U):
3501 This variable, if defined, contains the string used by stdio to
3502 format 64-bit unsigned decimal numbers (format 'u') for output.
3503
3504sPRIx64 (quadfio.U):
3505 This variable, if defined, contains the string used by stdio to
3506 format 64-bit hexadecimal numbers (format 'x') for output.
3507
6b356c8e 3508sPRIXU64 (quadfio.U):
ff935051
JH
3509 This variable, if defined, contains the string used by stdio to
3510 format 64-bit hExADECimAl numbers (format 'X') for output.
6b356c8e
JH
3511 The 'U' in the name is to separate this from sPRIx64 so that even
3512 case-blind systems can see the difference.
ff935051 3513
781b178c
JH
3514src (src.U):
3515 This variable holds the path to the package source. It is up to
3516 the Makefile to use this variable and set VPATH accordingly to
3517 find the sources remotely.
3518
6b356c8e
JH
3519sSCNfldbl (longdblfio.U):
3520 This variable, if defined, contains the string used by stdio to
3521 format long doubles (format 'f') for input.
3522
781b178c
JH
3523ssizetype (ssizetype.U):
3524 This variable defines ssizetype to be something like ssize_t,
3525 long or int. It is used by functions that return a count
3526 of bytes or an error condition. It must be a signed type.
3527 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3528
3529startperl (startperl.U):
3530 This variable contains the string to put on the front of a perl
3531 script to make sure (hopefully) that it runs with perl and not some
3532 shell. Of course, that leading line must be followed by the classical
3533 perl idiom:
3534 eval 'exec perl -S $0 ${1+"$@"}'
3535 if $running_under_some_shell;
3536 to guarantee perl startup should the shell execute the script. Note
3537 that this magic incatation is not understood by csh.
3538
3539startsh (startsh.U):
3540 This variable contains the string to put on the front of a shell
3541 script to make sure (hopefully) that it runs with sh and not some
3542 other shell.
3543
3544static_ext (Extensions.U):
3545 This variable holds a list of XS extension files we want to
3546 link statically into the package. It is used by Makefile.
3547
3548stdchar (stdchar.U):
3549 This variable conditionally defines STDCHAR to be the type of char
3550 used in stdio.h. It has the values "unsigned char" or "char".
3551
3552stdio_base (d_stdstdio.U):
3553 This variable defines how, given a FILE pointer, fp, to access the
3554 _base field (or equivalent) of stdio.h's FILE structure. This will
3555 be used to define the macro FILE_base(fp).
3556
3557stdio_bufsiz (d_stdstdio.U):
3558 This variable defines how, given a FILE pointer, fp, to determine
3559 the number of bytes store in the I/O buffer pointer to by the
3560 _base field (or equivalent) of stdio.h's FILE structure. This will
3561 be used to define the macro FILE_bufsiz(fp).
3562
3563stdio_cnt (d_stdstdio.U):
3564 This variable defines how, given a FILE pointer, fp, to access the
3565 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3566 be used to define the macro FILE_cnt(fp).
3567
3568stdio_filbuf (d_stdstdio.U):
3569 This variable defines how, given a FILE pointer, fp, to tell
022735b4 3570 stdio to refill its internal buffers (?). This will
781b178c
JH
3571 be used to define the macro FILE_filbuf(fp).
3572
3573stdio_ptr (d_stdstdio.U):
3574 This variable defines how, given a FILE pointer, fp, to access the
3575 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3576 be used to define the macro FILE_ptr(fp).
3577
3578stdio_stream_array (stdio_streams.U):
3579 This variable tells the name of the array holding the stdio streams.
3580 Usual values include _iob, __iob, and __sF.
3581
3582strings (i_string.U):
3583 This variable holds the full path of the string header that will be
3584 used. Typically /usr/include/string.h or /usr/include/strings.h.
3585
3586submit (Loc.U):
3587 This variable is defined but not used by Configure.
3588 The value is a plain '' and is not useful.
3589
3590subversion (patchlevel.U):
3591 The subversion level of this package.
3592 The value of subversion comes from the patchlevel.h file.
ff935051 3593 In a version number such as 5.6.1, this is the "1".
c890dc6c 3594 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
781b178c
JH
3595 This is unique to perl.
3596
3597sysman (sysman.U):
3598 This variable holds the place where the manual is located on this
3599 system. It is not the place where the user wants to put his manual
3600 pages. Rather it is the place where Configure may look to find manual
3601 for unix commands (section 1 of the manual usually). See mansrc.
3602
3603tail (Loc.U):
3604 This variable is defined but not used by Configure.
3605 The value is a plain '' and is not useful.
3606
3607tar (Loc.U):
3608 This variable is defined but not used by Configure.
3609 The value is a plain '' and is not useful.
3610
5440bc8e
JH
3611targetarch (Cross.U):
3612 If cross-compiling, this variable contains the target architecture.
3613 If not, this will be empty.
3614
781b178c
JH
3615tbl (Loc.U):
3616 This variable is defined but not used by Configure.
3617 The value is a plain '' and is not useful.
3618
3619tee (Loc.U):
3620 This variable is defined but not used by Configure.
3621 The value is a plain '' and is not useful.
3622
3623test (Loc.U):
5bf26616 3624 This variable is used internally by Configure to determine the
781b178c
JH
3625 full pathname (if any) of the test program. After Configure runs,
3626 the value is reset to a plain "test" and is not useful.
3627
3628timeincl (i_time.U):
3629 This variable holds the full path of the included time header(s).
3630
3631timetype (d_time.U):
3632 This variable holds the type returned by time(). It can be long,
3633 or time_t on BSD sites (in which case <sys/types.h> should be
3634 included). Anyway, the type Time_t should be used.
3635
5440bc8e
JH
3636to (Cross.U):
3637 This variable contains the command used by Configure
3638 to copy to from the target host. Useful and available
3639 only during Perl build.
3640 The string ':' if not cross-compiling.
3641
781b178c 3642touch (Loc.U):
5bf26616 3643 This variable is used internally by Configure to determine the
781b178c
JH
3644 full pathname (if any) of the touch program. After Configure runs,
3645 the value is reset to a plain "touch" and is not useful.
3646
3647tr (Loc.U):
5bf26616 3648 This variable is used internally by Configure to determine the
781b178c
JH
3649 full pathname (if any) of the tr program. After Configure runs,
3650 the value is reset to a plain "tr" and is not useful.
3651
3652trnl (trnl.U):
3653 This variable contains the value to be passed to the tr(1)
3654 command to transliterate a newline. Typical values are
3655 '\012' and '\n'. This is needed for EBCDIC systems where
3656 newline is not necessarily '\012'.
3657
3658troff (Loc.U):
3659 This variable is defined but not used by Configure.
3660 The value is a plain '' and is not useful.
3661
a22e52b9
JH
3662u16size (perlxv.U):
3663 This variable is the size of an U16 in bytes.
3664
3665u16type (perlxv.U):
3666 This variable contains the C type used for Perl's U16.
3667
3668u32size (perlxv.U):
3669 This variable is the size of an U32 in bytes.
3670
3671u32type (perlxv.U):
3672 This variable contains the C type used for Perl's U32.
3673
3674u64size (perlxv.U):
3675 This variable is the size of an U64 in bytes.
3676
3677u64type (perlxv.U):
3678 This variable contains the C type used for Perl's U64.
3679
3680u8size (perlxv.U):
3681 This variable is the size of an U8 in bytes.
3682
3683u8type (perlxv.U):
3684 This variable contains the C type used for Perl's U8.
3685
3686uidformat (uidf.U):
3687 This variable contains the format string used for printing a Uid_t.
3688
2d228ff3
JH
3689uidsign (uidsign.U):
3690 This variable contains the signedness of a uidtype.
3691 1 for unsigned, -1 for signed.
3692
785fb66b
JH
3693uidsize (uidsize.U):
3694 This variable contains the size of a uidtype in bytes.
3695
781b178c
JH
3696uidtype (uidtype.U):
3697 This variable defines Uid_t to be something like uid_t, int,
3698 ushort, or whatever type is used to declare user ids in the kernel.
3699
3700uname (Loc.U):
5bf26616 3701 This variable is used internally by Configure to determine the
781b178c
JH
3702 full pathname (if any) of the uname program. After Configure runs,
3703 the value is reset to a plain "uname" and is not useful.
3704
3705uniq (Loc.U):
5bf26616 3706 This variable is used internally by Configure to determine the
781b178c
JH
3707 full pathname (if any) of the uniq program. After Configure runs,
3708 the value is reset to a plain "uniq" and is not useful.
3709
0befd8de
JH
3710uquadtype (quadtype.U):
3711 This variable defines Uquad_t to be something like unsigned long,
3712 unsigned int, unsigned long long, uint64_t, or whatever type is
3713 used for 64-bit integers.
3714
aaacdc8b
GS
3715use5005threads (usethreads.U):
3716 This variable conditionally defines the USE_5005THREADS symbol,
3717 and indicates that Perl should be built to use the 5.005-based
3718 threading implementation.
3719
10cc9d2a
JH
3720use64bitall (use64bits.U):
3721 This variable conditionally defines the USE_64_BIT_ALL symbol,
3722 and indicates that 64-bit integer types should be used
3723 when available. The maximal possible
3724 64-bitness is employed: LP64 or ILP64, meaning that you will
3725 be able to use more than 2 gigabytes of memory. This mode is
3726 even more binary incompatible than USE_64_BIT_INT. You may not
3727 be able to run the resulting executable in a 32-bit CPU at all or
3728 you may need at least to reboot your OS to 64-bit mode.
3729
3730use64bitint (use64bits.U):
3731 This variable conditionally defines the USE_64_BIT_INT symbol,
aaacdc8b 3732 and indicates that 64-bit integer types should be used
c890dc6c
JH
3733 when available. The minimal possible 64-bitness
3734 is employed, just enough to get 64-bit integers into Perl.
3735 This may mean using for example "long longs", while your memory
3736 may still be limited to 2 gigabytes.
781b178c 3737
5440bc8e
JH
3738usecrosscompile (Cross.U):
3739 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3740 and indicates that Perl has been cross-compiled.
3741
781b178c 3742usedl (dlsrc.U):
ff935051 3743 This variable indicates if the system supports dynamic
781b178c
JH
3744 loading of some sort. See also dlsrc and dlobj.
3745
aaacdc8b
GS
3746useithreads (usethreads.U):
3747 This variable conditionally defines the USE_ITHREADS symbol,
3748 and indicates that Perl should be built to use the interpreter-based
3749 threading implementation.
3750
5bf26616 3751uselargefiles (uselfs.U):
1baac590
JH
3752 This variable conditionally defines the USE_LARGE_FILES symbol,
3753 and indicates that large file interfaces should be used when
c890dc6c 3754 available.
1baac590 3755
ca24dfc6
LV
3756uselongdouble (uselongdbl.U):
3757 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3758 and indicates that long doubles should be used when available.
3759
1baac590
JH
3760usemorebits (usemorebits.U):
3761 This variable conditionally defines the USE_MORE_BITS symbol,
3762 and indicates that explicit 64-bit interfaces and long doubles
3763 should be used when available.
3764
781b178c
JH
3765usemultiplicity (usemultiplicity.U):
3766 This variable conditionally defines the MULTIPLICITY symbol,
3767 and indicates that Perl should be built to use multiplicity.
3768
3769usemymalloc (mallocsrc.U):
3770 This variable contains y if the malloc that comes with this package
3771 is desired over the system's version of malloc. People often include
3772 special versions of malloc for effiency, but such versions are often
3773 less portable. See also mallocsrc and mallocobj.
3774 If this is 'y', then -lmalloc is removed from $libs.
3775
3776usenm (usenm.U):
3777 This variable contains 'true' or 'false' depending whether the
3778 nm extraction is wanted or not.
3779
3780useopcode (Extensions.U):
3781 This variable holds either 'true' or 'false' to indicate
3782 whether the Opcode extension should be used. The sole
3783 use for this currently is to allow an easy mechanism
3784 for users to skip the Opcode extension from the Configure
3785 command line.
3786
3787useperlio (useperlio.U):
3788 This variable conditionally defines the USE_PERLIO symbol,
3789 and indicates that the PerlIO abstraction should be
3790 used throughout.
3791
3792useposix (Extensions.U):
3793 This variable holds either 'true' or 'false' to indicate
3794 whether the POSIX extension should be used. The sole
3795 use for this currently is to allow an easy mechanism
3796 for hints files to indicate that POSIX will not compile
3797 on a particular system.
3798
9514c62b
JH
3799usereentrant (usethreads.U):
3800 This variable conditionally defines the USE_REENTRANT_API symbol,
3801 which indicates that the thread code may try to use the various
3802 _r versions of library functions. This is only potentially
3803 meaningful if usethreads is set and is very experimental, it is
3804 not even prompted for.
3805
781b178c
JH
3806usesfio (d_sfio.U):
3807 This variable is set to true when the user agrees to use sfio.
3808 It is set to false when sfio is not available or when the user
3809 explicitely requests not to use sfio. It is here primarily so
3810 that command-line settings can override the auto-detection of
3811 d_sfio without running into a "WHOA THERE".
3812
3813useshrplib (libperl.U):
3814 This variable is set to 'yes' if the user wishes
3815 to build a shared libperl, and 'no' otherwise.
3816
3817usesocks (usesocks.U):
3818 This variable conditionally defines the USE_SOCKS symbol,
3819 and indicates that Perl should be built to use SOCKS.
3820
3821usethreads (usethreads.U):
3822 This variable conditionally defines the USE_THREADS symbol,
3823 and indicates that Perl should be built to use threads.
3824
9f50e519
NA
3825usevendorprefix (vendorprefix.U):
3826 This variable tells whether the vendorprefix
3827 and consequently other vendor* paths are in use.
3828
781b178c
JH
3829usevfork (d_vfork.U):
3830 This variable is set to true when the user accepts to use vfork.
3831 It is set to false when no vfork is available or when the user
3832 explicitely requests not to use vfork.
3833
3834usrinc (usrinc.U):
3835 This variable holds the path of the include files, which is
3836 usually /usr/include. It is mainly used by other Configure units.
3837
3838uuname (Loc.U):
3839 This variable is defined but not used by Configure.
3840 The value is a plain '' and is not useful.
3841
a22e52b9
JH
3842uvoformat (perlxvf.U):
3843 This variable contains the format string used for printing
3844 a Perl UV as an unsigned octal integer.
3845
3846uvsize (perlxv.U):
3847 This variable is the size of a UV in bytes.
3848
3849uvtype (perlxv.U):
3850 This variable contains the C type used for Perl's UV.
3851
3852uvuformat (perlxvf.U):
3853 This variable contains the format string used for printing
3854 a Perl UV as an unsigned decimal integer.
3855
3856uvxformat (perlxvf.U):
3857 This variable contains the format string used for printing
6b4667fc
A
3858 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3859
6b356c8e 3860uvXUformat (perlxvf.U):
6b4667fc
A
3861 This variable contains the format string used for printing
3862 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
a22e52b9 3863
526fdc24
MS
3864vendorarch (vendorarch.U):
3865 This variable contains the value of the PERL_VENDORARCH symbol.
3866 It may have a ~ on the front.
3867 The standard distribution will put nothing in this directory.
3868 Vendors who distribute perl may wish to place their own
3869 architecture-dependent modules and extensions in this directory with
3870 MakeMaker Makefile.PL INSTALLDIRS=vendor
3871 or equivalent. See INSTALL for details.
3872
3873vendorarchexp (vendorarch.U):
3874 This variable is the ~name expanded version of vendorarch, so that you
3875 may use it directly in Makefiles or shell scripts.
3876
0617aed7 3877vendorbin (vendorbin.U):
f868067f
JH
3878 This variable contains the eventual value of the VENDORBIN symbol.
3879 It may have a ~ on the front.
3880 The standard distribution will put nothing in this directory.
3881 Vendors who distribute perl may wish to place additional
3882 binaries in this directory with
3883 MakeMaker Makefile.PL INSTALLDIRS=vendor
3884 or equivalent. See INSTALL for details.
0617aed7
JH
3885
3886vendorbinexp (vendorbin.U):
3887 This variable is the ~name expanded version of vendorbin, so that you
3888 may use it directly in Makefiles or shell scripts.
3889
a3635516
JH
3890vendorlib (vendorlib.U):
3891 This variable contains the eventual value of the VENDORLIB symbol,
f868067f
JH
3892 which is the name of the private library for this package.
3893 The standard distribution will put nothing in this directory.
3894 Vendors who distribute perl may wish to place their own
3895 modules in this directory with
3896 MakeMaker Makefile.PL INSTALLDIRS=vendor
3897 or equivalent. See INSTALL for details.
a3635516 3898
526fdc24
MS
3899vendorlib_stem (vendorlib.U):
3900 This variable is $vendorlibexp with any trailing version-specific component
3901 removed. The elements in inc_version_list (inc_version_list.U) can
3902 be tacked onto this variable to generate a list of directories to search.
3903
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3904vendorlibexp (vendorlib.U):
3905 This variable is the ~name expanded version of vendorlib, so that you
3906 may use it directly in Makefiles or shell scripts.
3907
3908vendorprefix (vendorprefix.U):
3909 This variable holds the full absolute path of the directory below
3910 which the vendor will install add-on packages.
f868067f 3911 See INSTALL for usage and examples.
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3912
3913vendorprefixexp (vendorprefix.U):
3914 This variable holds the full absolute path of the directory below
3915 which the vendor will install add-on packages. Derived from vendorprefix.
3916
781b178c 3917version (patchlevel.U):
ff935051 3918 The full version number of this package, such as 5.6.1 (or 5_6_1).
c890dc6c 3919 This combines revision, patchlevel, and subversion to get the
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3920 full version number, including any possible subversions.
3921 This is suitable for use as a directory name, and hence is
3922 filesystem dependent.
781b178c 3923
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JH
3924version_patchlevel_string (patchlevel.U):
3925 This is a string combining version, subversion and
3926 perl_patchlevel (if perl_patchlevel is non-zero).
3927 It is typically something like
3928 'version 7 subversion 1' or
3929 'version 7 subversion 1 patchlevel 11224'
3930 It is computed here to avoid duplication of code in myconfig.SH
3931 and lib/Config.pm.
3932
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3933versiononly (versiononly.U):
3934 If set, this symbol indicates that only the version-specific
3935 components of a perl installation should be installed.
3936 This may be useful for making a test installation of a new
3937 version without disturbing the existing installation.
3938 Setting versiononly is equivalent to setting installperl's -v option.
3939 In particular, the non-versioned scripts and programs such as
3940 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3941 (see INSTALL for a more complete list). Nor are the man
3942 pages installed.
3943 Usually, this is undef.
3944
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3945vi (Loc.U):
3946 This variable is defined but not used by Configure.
3947 The value is a plain '' and is not useful.
3948
3949voidflags (voidflags.U):
3950 This variable contains the eventual value of the VOIDFLAGS symbol,
3951 which indicates how much support of the void type is given by this
3952 compiler. See VOIDFLAGS for more info.
3953
3954xlibpth (libpth.U):
3955 This variable holds extra path (space-separated) used to find
3956 libraries on this platform, for example CPU-specific libraries
3957 (on multi-CPU platforms) may be listed here.
3958
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3959xs_apiversion (xs_apiversion.U):
3960 This variable contains the version of the oldest perl binary
3961 compatible with the present perl. perl.c:incpush() and
3962 lib/lib.pm will automatically search in $sitearch for older
3963 directories across major versions back to xs_apiversion.
3964 This is only useful if you have a perl library directory tree
3965 structured like the default one.
3966 See INSTALL for how this works.
3967 The versioned site_perl directory was introduced in 5.005,
3968 so that is the lowest possible value.
3969 Since this can depend on compile time options (such as
3970 bincompat) it is set by Configure. Other non-default sources
3971 of potential incompatibility, such as multiplicity, threads,
3972 debugging, 64bits, sfio, etc., are not checked for currently,
3973 though in principle we could go snooping around in old
3974 Config.pm files.
3975
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3976yacc (yacc.U):
3977 This variable holds the name of the compiler compiler we
3978 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3979
3980yaccflags (yacc.U):
3981 This variable contains any additional yacc flags desired by the
3982 user. It is up to the Makefile to use this.
3983
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3984zcat (Loc.U):
3985 This variable is defined but not used by Configure.
3986 The value is a plain '' and is not useful.
3987
3988zip (Loc.U):
5bf26616 3989 This variable is used internally by Configure to determine the
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3990 full pathname (if any) of the zip program. After Configure runs,
3991 the value is reset to a plain "zip" and is not useful.
3992