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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
27alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
30
31ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
34
35aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
39
40apiversion (patchlevel.U):
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41 MakeMaker will install add-on modules in a directory with the
42 PERL_APIVERSION version number. The value is set manually in
43 patchlevel.h. Normally, for maintenance releases, this is
44 just something like 5.005 or 5.6 or 5.7. That is, it does not
45 include the subversion number and does not change across
46 maintenance releases. This is so that add-on extensions can
47 be shared across maintenance versions. It is unclear how this
48 ought to work for developer versions. If a release breaks
49 binary compatibility, this number should be increased.
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50
51ar (Loc.U):
5bf26616 52 This variable is used internally by Configure to determine the
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53 full pathname (if any) of the ar program. After Configure runs,
54 the value is reset to a plain "ar" and is not useful.
55
56archlib (archlib.U):
57 This variable holds the name of the directory in which the user wants
58 to put architecture-dependent public library files for $package.
59 It is most often a local directory such as /usr/local/lib.
60 Programs using this variable must be prepared to deal
61 with filename expansion.
62
63archlibexp (archlib.U):
64 This variable is the same as the archlib variable, but is
65 filename expanded at configuration time, for convenient use.
66
67archname64 (use64bits.U):
68 This variable is used for the 64-bitness part of $archname.
69
70archname (archname.U):
71 This variable is a short name to characterize the current
72 architecture. It is used mainly to construct the default archlib.
73
74archobjs (Unix.U):
75 This variable defines any additional objects that must be linked
76 in with the program on this architecture. On unix, it is usually
77 empty. It is typically used to include emulations of unix calls
78 or other facilities. For perl on OS/2, for example, this would
79 include os2/os2.obj.
80
81awk (Loc.U):
5bf26616 82 This variable is used internally by Configure to determine the
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83 full pathname (if any) of the awk program. After Configure runs,
84 the value is reset to a plain "awk" and is not useful.
85
86baserev (baserev.U):
87 The base revision level of this package, from the .package file.
88
89bash (Loc.U):
90 This variable is defined but not used by Configure.
91 The value is a plain '' and is not useful.
92
93bin (bin.U):
94 This variable holds the name of the directory in which the user wants
95 to put publicly executable images for the package in question. It
96 is most often a local directory such as /usr/local/bin. Programs using
97 this variable must be prepared to deal with ~name substitution.
98
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99bincompat5005 (bincompat5005.U):
100 This variable contains y if Perl 5.006 should be binary-compatible
101 with Perl 5.005.
102
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103binexp (bin.U):
104 This is the same as the bin variable, but is filename expanded at
105 configuration time, for use in your makefiles.
106
107bison (Loc.U):
108 This variable is defined but not used by Configure.
109 The value is a plain '' and is not useful.
110
111byacc (Loc.U):
5bf26616 112 This variable is used internally by Configure to determine the
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113 full pathname (if any) of the byacc program. After Configure runs,
114 the value is reset to a plain "byacc" and is not useful.
115
116byteorder (byteorder.U):
117 This variable holds the byte order. In the following, larger digits
118 indicate more significance. The variable byteorder is either 4321
119 on a big-endian machine, or 1234 on a little-endian, or 87654321
120 on a Cray ... or 3412 with weird order !
121
122c (n.U):
123 This variable contains the \c string if that is what causes the echo
124 command to suppress newline. Otherwise it is null. Correct usage is
125 $echo $n "prompt for a question: $c".
126
127castflags (d_castneg.U):
128 This variable contains a flag that precise difficulties the
129 compiler has casting odd floating values to unsigned long:
130 0 = ok
131 1 = couldn't cast < 0
132 2 = couldn't cast >= 0x80000000
133 4 = couldn't cast in argument expression list
134
135cat (Loc.U):
5bf26616 136 This variable is used internally by Configure to determine the
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137 full pathname (if any) of the cat program. After Configure runs,
138 the value is reset to a plain "cat" and is not useful.
139
140cc (cc.U):
141 This variable holds the name of a command to execute a C compiler which
142 can resolve multiple global references that happen to have the same
143 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
144
145cccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed with 'cc -c' to compile modules to be used to create a shared
148 library that will be used for dynamic loading. For hpux, this
149 should be +z. It is up to the makefile to use it.
150
151ccdlflags (dlsrc.U):
152 This variable contains any special flags that might need to be
153 passed to cc to link with a shared library for dynamic loading.
154 It is up to the makefile to use it. For sunos 4.1, it should
155 be empty.
156
157ccflags (ccflags.U):
158 This variable contains any additional C compiler flags desired by
159 the user. It is up to the Makefile to use this.
160
161ccsymbols (Cppsym.U):
162 The variable contains the symbols defined by the C compiler alone.
163 The symbols defined by cpp or by cc when it calls cpp are not in
164 this list, see cppsymbols and cppccsymbols.
165 The list is a space-separated list of symbol=value tokens.
166
167cf_by (cf_who.U):
168 Login name of the person who ran the Configure script and answered the
169 questions. This is used to tag both config.sh and config_h.SH.
170
171cf_email (cf_email.U):
172 Electronic mail address of the person who ran Configure. This can be
173 used by units that require the user's e-mail, like MailList.U.
174
175cf_time (cf_who.U):
176 Holds the output of the "date" command when the configuration file was
177 produced. This is used to tag both config.sh and config_h.SH.
178
179chgrp (Loc.U):
180 This variable is defined but not used by Configure.
181 The value is a plain '' and is not useful.
182
183chmod (Loc.U):
184 This variable is defined but not used by Configure.
185 The value is a plain '' and is not useful.
186
187chown (Loc.U):
188 This variable is defined but not used by Configure.
189 The value is a plain '' and is not useful.
190
191clocktype (d_times.U):
192 This variable holds the type returned by times(). It can be long,
193 or clock_t on BSD sites (in which case <sys/types.h> should be
194 included).
195
196comm (Loc.U):
5bf26616 197 This variable is used internally by Configure to determine the
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198 full pathname (if any) of the comm program. After Configure runs,
199 the value is reset to a plain "comm" and is not useful.
200
201compress (Loc.U):
202 This variable is defined but not used by Configure.
203 The value is a plain '' and is not useful.
204
205contains (contains.U):
206 This variable holds the command to do a grep with a proper return
207 status. On most sane systems it is simply "grep". On insane systems
208 it is a grep followed by a cat followed by a test. This variable
209 is primarily for the use of other Configure units.
210
211cp (Loc.U):
5bf26616 212 This variable is used internally by Configure to determine the
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213 full pathname (if any) of the cp program. After Configure runs,
214 the value is reset to a plain "cp" and is not useful.
215
216cpio (Loc.U):
217 This variable is defined but not used by Configure.
218 The value is a plain '' and is not useful.
219
220cpp (Loc.U):
5bf26616 221 This variable is used internally by Configure to determine the
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222 full pathname (if any) of the cpp program. After Configure runs,
223 the value is reset to a plain "cpp" and is not useful.
224
225cpp_stuff (cpp_stuff.U):
226 This variable contains an identification of the catenation mechanism
227 used by the C preprocessor.
228
229cppccsymbols (Cppsym.U):
230 The variable contains the symbols defined by the C compiler when
231 when it calls cpp. The symbols defined by the cc alone or cpp
232 alone are not in this list, see ccsymbols and cppsymbols.
233 The list is a space-separated list of symbol=value tokens.
234
235cppflags (ccflags.U):
236 This variable holds the flags that will be passed to the C pre-
237 processor. It is up to the Makefile to use it.
238
239cpplast (cppstdin.U):
240 This variable has the same functionality as cppminus, only it applies
241 to cpprun and not cppstdin.
242
243cppminus (cppstdin.U):
244 This variable contains the second part of the string which will invoke
245 the C preprocessor on the standard input and produce to standard
246 output. This variable will have the value "-" if cppstdin needs
247 a minus to specify standard input, otherwise the value is "".
248
249cpprun (cppstdin.U):
250 This variable contains the command which will invoke a C preprocessor
251 on standard input and put the output to stdout. It is guaranteed not
252 to be a wrapper and may be a null string if no preprocessor can be
253 made directly available. This preprocessor might be different from the
254 one used by the C compiler. Don't forget to append cpplast after the
255 preprocessor options.
256
257cppstdin (cppstdin.U):
258 This variable contains the command which will invoke the C
259 preprocessor on standard input and put the output to stdout.
260 It is primarily used by other Configure units that ask about
261 preprocessor symbols.
262
263cppsymbols (Cppsym.U):
264 The variable contains the symbols defined by the C preprocessor
265 alone. The symbols defined by cc or by cc when it calls cpp are
266 not in this list, see ccsymbols and cppccsymbols.
267 The list is a space-separated list of symbol=value tokens.
268
269crosscompile (crosscompile.U):
270 This variable conditionally defines the CROSSCOMPILE symbol
271 which signifies that the build process is be a cross-compilation.
272 This is normally set by hints files or from Configure command line.
273
274cryptlib (d_crypt.U):
275 This variable holds -lcrypt or the path to a libcrypt.a archive if
276 the crypt() function is not defined in the standard C library. It is
277 up to the Makefile to use this.
278
279csh (Loc.U):
5bf26616 280 This variable is used internally by Configure to determine the
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281 full pathname (if any) of the csh program. After Configure runs,
282 the value is reset to a plain "csh" and is not useful.
283
284d_access (d_access.U):
285 This variable conditionally defines HAS_ACCESS if the access() system
286 call is available to check for access permissions using real IDs.
287
288d_accessx (d_accessx.U):
289 This variable conditionally defines the HAS_ACCESSX symbol, which
290 indicates to the C program that the accessx() routine is available.
291
292d_alarm (d_alarm.U):
293 This variable conditionally defines the HAS_ALARM symbol, which
294 indicates to the C program that the alarm() routine is available.
295
296d_archlib (archlib.U):
297 This variable conditionally defines ARCHLIB to hold the pathname
298 of architecture-dependent library files for $package. If
299 $archlib is the same as $privlib, then this is set to undef.
300
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301d_atolf (atolf.U):
302 This variable conditionally defines the HAS_ATOLF symbol, which
303 indicates to the C program that the atolf() routine is available.
304
305d_atoll (atoll.U):
306 This variable conditionally defines the HAS_ATOLL symbol, which
307 indicates to the C program that the atoll() routine is available.
308
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309d_attribut (d_attribut.U):
310 This variable conditionally defines HASATTRIBUTE, which
311 indicates the C compiler can check for function attributes,
312 such as printf formats.
313
314d_bcmp (d_bcmp.U):
315 This variable conditionally defines the HAS_BCMP symbol if
316 the bcmp() routine is available to compare strings.
317
318d_bcopy (d_bcopy.U):
319 This variable conditionally defines the HAS_BCOPY symbol if
320 the bcopy() routine is available to copy strings.
321
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322d_bincompat5005 (bincompat5005.U):
323 This variable conditionally defines BINCOMPAT5005 so that embed.h
324 can take special action if Perl 5.006 should be binary-compatible
325 with Perl 5.005. This is impossible for builds that use features
326 like threads and multiplicity it is always $undef for those versions.
327
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328d_bsd (Guess.U):
329 This symbol conditionally defines the symbol BSD when running on a
330 BSD system.
331
332d_bsdgetpgrp (d_getpgrp.U):
333 This variable conditionally defines USE_BSD_GETPGRP if
334 getpgrp needs one arguments whereas USG one needs none.
335
336d_bsdsetpgrp (d_setpgrp.U):
337 This variable conditionally defines USE_BSD_SETPGRP if
338 setpgrp needs two arguments whereas USG one needs none.
339 See also d_setpgid for a POSIX interface.
340
341d_bzero (d_bzero.U):
342 This variable conditionally defines the HAS_BZERO symbol if
343 the bzero() routine is available to set memory to 0.
344
345d_casti32 (d_casti32.U):
346 This variable conditionally defines CASTI32, which indicates
347 whether the C compiler can cast large floats to 32-bit ints.
348
349d_castneg (d_castneg.U):
350 This variable conditionally defines CASTNEG, which indicates
351 wether the C compiler can cast negative float to unsigned.
352
353d_charvspr (d_vprintf.U):
354 This variable conditionally defines CHARVSPRINTF if this system
355 has vsprintf returning type (char*). The trend seems to be to
356 declare it as "int vsprintf()".
357
358d_chown (d_chown.U):
359 This variable conditionally defines the HAS_CHOWN symbol, which
360 indicates to the C program that the chown() routine is available.
361
362d_chroot (d_chroot.U):
363 This variable conditionally defines the HAS_CHROOT symbol, which
364 indicates to the C program that the chroot() routine is available.
365
366d_chsize (d_chsize.U):
367 This variable conditionally defines the CHSIZE symbol, which
368 indicates to the C program that the chsize() routine is available
369 to truncate files. You might need a -lx to get this routine.
370
371d_closedir (d_closedir.U):
372 This variable conditionally defines HAS_CLOSEDIR if closedir() is
373 available.
374
375d_cmsghdr_s (d_socket.U):
376 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
377 which indicates that the the struct cmsghdr is supported.
378
379d_const (d_const.U):
380 This variable conditionally defines the HASCONST symbol, which
381 indicates to the C program that this C compiler knows about the
382 const type.
383
384d_crypt (d_crypt.U):
385 This variable conditionally defines the CRYPT symbol, which
386 indicates to the C program that the crypt() routine is available
387 to encrypt passwords and the like.
388
389d_csh (d_csh.U):
390 This variable conditionally defines the CSH symbol, which
391 indicates to the C program that the C-shell exists.
392
393d_cuserid (d_cuserid.U):
394 This variable conditionally defines the HAS_CUSERID symbol, which
395 indicates to the C program that the cuserid() routine is available
396 to get character login names.
397
398d_dbl_dig (d_dbl_dig.U):
399 This variable conditionally defines d_dbl_dig if this system's
400 header files provide DBL_DIG, which is the number of significant
401 digits in a double precision number.
402
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403d_difftime (d_difftime.U):
404 This variable conditionally defines the HAS_DIFFTIME symbol, which
405 indicates to the C program that the difftime() routine is available.
406
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407d_dirnamlen (i_dirent.U):
408 This variable conditionally defines DIRNAMLEN, which indicates
409 to the C program that the length of directory entry names is
410 provided by a d_namelen field.
411
412d_dlerror (d_dlerror.U):
413 This variable conditionally defines the HAS_DLERROR symbol, which
414 indicates to the C program that the dlerror() routine is available.
415
416d_dlopen (d_dlopen.U):
417 This variable conditionally defines the HAS_DLOPEN symbol, which
418 indicates to the C program that the dlopen() routine is available.
419
420d_dlsymun (d_dlsymun.U):
421 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
422 indicates that we need to prepend an underscore to the symbol
423 name before calling dlsym().
424
425d_dosuid (d_dosuid.U):
426 This variable conditionally defines the symbol DOSUID, which
427 tells the C program that it should insert setuid emulation code
428 on hosts which have setuid #! scripts disabled.
429
430d_drand48proto (d_drand48proto.U):
431 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
432 which indicates to the C program that the system provides
433 a prototype for the drand48() function. Otherwise, it is
434 up to the program to supply one.
435
436d_dup2 (d_dup2.U):
437 This variable conditionally defines HAS_DUP2 if dup2() is
438 available to duplicate file descriptors.
439
440d_eaccess (d_eaccess.U):
441 This variable conditionally defines the HAS_EACCESS symbol, which
442 indicates to the C program that the eaccess() routine is available.
443
444d_endgrent (d_endgrent.U):
445 This variable conditionally defines the HAS_ENDGRENT symbol, which
446 indicates to the C program that the endgrent() routine is available
447 for sequential access of the group database.
448
449d_endhent (d_endhent.U):
450 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
451 available to close whatever was being used for host queries.
452
453d_endnent (d_endnent.U):
454 This variable conditionally defines HAS_ENDNETENT if endnetent() is
455 available to close whatever was being used for network queries.
456
457d_endpent (d_endpent.U):
458 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
459 available to close whatever was being used for protocol queries.
460
461d_endpwent (d_endpwent.U):
462 This variable conditionally defines the HAS_ENDPWENT symbol, which
463 indicates to the C program that the endpwent() routine is available
464 for sequential access of the passwd database.
465
466d_endsent (d_endsent.U):
467 This variable conditionally defines HAS_ENDSERVENT if endservent() is
468 available to close whatever was being used for service queries.
469
470d_endspent (d_endspent.U):
471 This variable conditionally defines HAS_ENDSPENT if endspent() is
472 available to finalize the scan of SysV shadow password entries.
473
474d_eofnblk (nblock_io.U):
475 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
476 when reading from a non-blocking I/O source.
477
478d_eunice (Guess.U):
479 This variable conditionally defines the symbols EUNICE and VAX, which
480 alerts the C program that it must deal with ideosyncracies of VMS.
481
482d_fchmod (d_fchmod.U):
483 This variable conditionally defines the HAS_FCHMOD symbol, which
484 indicates to the C program that the fchmod() routine is available
485 to change mode of opened files.
486
487d_fchown (d_fchown.U):
488 This variable conditionally defines the HAS_FCHOWN symbol, which
489 indicates to the C program that the fchown() routine is available
490 to change ownership of opened files.
491
492d_fcntl (d_fcntl.U):
493 This variable conditionally defines the HAS_FCNTL symbol, and indicates
494 whether the fcntl() function exists
495
496d_fd_macros (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_MACROS symbol,
498 which indicates if your C compiler knows about the macros which
499 manipulate an fd_set.
500
501d_fd_set (d_fd_set.U):
502 This variable contains the eventual value of the HAS_FD_SET symbol,
503 which indicates if your C compiler knows about the fd_set typedef.
504
505d_fds_bits (d_fd_set.U):
506 This variable contains the eventual value of the HAS_FDS_BITS symbol,
507 which indicates if your fd_set typedef contains the fds_bits member.
508 If you have an fd_set typedef, but the dweebs who installed it did
509 a half-fast job and neglected to provide the macros to manipulate
510 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
511
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512d_fgetpos (d_fgetpos.U):
513 This variable conditionally defines HAS_FGETPOS if fgetpos() is
514 available to get the file position indicator.
515
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516d_flexfnam (d_flexfnam.U):
517 This variable conditionally defines the FLEXFILENAMES symbol, which
518 indicates that the system supports filenames longer than 14 characters.
519
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520d_flock (d_flock.U):
521 This variable conditionally defines HAS_FLOCK if flock() is
522 available to do file locking.
523
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524d_fork (d_fork.U):
525 This variable conditionally defines the HAS_FORK symbol, which
526 indicates to the C program that the fork() routine is available.
527
528d_fpathconf (d_pathconf.U):
529 This variable conditionally defines the HAS_FPATHCONF symbol, which
530 indicates to the C program that the pathconf() routine is available
531 to determine file-system related limits and options associated
532 with a given open file descriptor.
533
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534d_fpos64_t (io64.U):
535 This symbol will be defined if the C compiler supports fpos64_t.
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536
537d_fseeko (d_fseeko.U):
538 This variable conditionally defines the HAS_FSEEKO symbol, which
539 indicates to the C program that the fseeko() routine is available.
540
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541d_fsetpos (d_fsetpos.U):
542 This variable conditionally defines HAS_FSETPOS if fsetpos() is
543 available to set the file position indicator.
544
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545d_fstatfs (d_statfs.U):
546 This variable conditionally defines the HAS_FSTATFS symbol, which
547 indicates to the C program that the fstatfs() routine is available.
548
549d_fstatvfs (d_statvfs.U):
550 This variable conditionally defines the HAS_FSTATVFS symbol, which
551 indicates to the C program that the fstatvfs() routine is available.
552
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553d_ftello (d_ftello.U):
554 This variable conditionally defines the HAS_FTELLO symbol, which
555 indicates to the C program that the ftello() routine is available.
556
557d_ftime (d_ftime.U):
558 This variable conditionally defines the HAS_FTIME symbol, which indicates
559 that the ftime() routine exists. The ftime() routine is basically
560 a sub-second accuracy clock.
561
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562d_Gconvert (d_gconvert.U):
563 This variable holds what Gconvert is defined as to convert
564 floating point numbers into strings. It could be 'gconvert'
565 or a more complex macro emulating gconvert with gcvt() or sprintf.
566 Possible values are:
567 d_Gconvert='gconvert((x),(n),(t),(b))'
568 d_Gconvert='gcvt((x),(n),(b))'
569 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
570
571d_getgrent (d_getgrent.U):
572 This variable conditionally defines the HAS_GETGRENT symbol, which
573 indicates to the C program that the getgrent() routine is available
574 for sequential access of the group database.
575
576d_getgrps (d_getgrps.U):
577 This variable conditionally defines the HAS_GETGROUPS symbol, which
578 indicates to the C program that the getgroups() routine is available
579 to get the list of process groups.
580
581d_gethbyaddr (d_gethbyad.U):
582 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
583 indicates to the C program that the gethostbyaddr() routine is available
584 to look up hosts by their IP addresses.
585
586d_gethbyname (d_gethbynm.U):
587 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
588 indicates to the C program that the gethostbyname() routine is available
589 to look up host names in some data base or other.
590
591d_gethent (d_gethent.U):
592 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
593 available to look up host names in some data base or another.
594
595d_gethname (d_gethname.U):
596 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
597 indicates to the C program that the gethostname() routine may be
598 used to derive the host name.
599
600d_gethostprotos (d_gethostprotos.U):
601 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
602 which indicates to the C program that <netdb.h> supplies
603 prototypes for the various gethost*() functions.
604 See also netdbtype.U for probing for various netdb types.
605
606d_getlogin (d_getlogin.U):
607 This variable conditionally defines the HAS_GETLOGIN symbol, which
608 indicates to the C program that the getlogin() routine is available
609 to get the login name.
610
611d_getmntent (d_getmntent.U):
612 This variable conditionally defines the HAS_GETMNTENT symbol, which
613 indicates to the C program that the getmntent() routine is available
614 to iterate through mounted files.
615
616d_getnbyaddr (d_getnbyad.U):
617 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
618 indicates to the C program that the getnetbyaddr() routine is available
619 to look up networks by their IP addresses.
620
621d_getnbyname (d_getnbynm.U):
622 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
623 indicates to the C program that the getnetbyname() routine is available
624 to look up networks by their names.
625
626d_getnent (d_getnent.U):
627 This variable conditionally defines HAS_GETNETENT if getnetent() is
628 available to look up network names in some data base or another.
629
630d_getnetprotos (d_getnetprotos.U):
631 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
632 which indicates to the C program that <netdb.h> supplies
633 prototypes for the various getnet*() functions.
634 See also netdbtype.U for probing for various netdb types.
635
636d_getpbyname (d_getprotby.U):
637 This variable conditionally defines the HAS_GETPROTOBYNAME
638 symbol, which indicates to the C program that the
639 getprotobyname() routine is available to look up protocols
640 by their name.
641
642d_getpbynumber (d_getprotby.U):
643 This variable conditionally defines the HAS_GETPROTOBYNUMBER
644 symbol, which indicates to the C program that the
645 getprotobynumber() routine is available to look up protocols
646 by their number.
647
648d_getpent (d_getpent.U):
649 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
650 available to look up protocols in some data base or another.
651
652d_getpgid (d_getpgid.U):
653 This variable conditionally defines the HAS_GETPGID symbol, which
654 indicates to the C program that the getpgid(pid) function
655 is available to get the process group id.
656
657d_getpgrp2 (d_getpgrp2.U):
658 This variable conditionally defines the HAS_GETPGRP2 symbol, which
659 indicates to the C program that the getpgrp2() (as in DG/UX) routine
660 is available to get the current process group.
661
662d_getpgrp (d_getpgrp.U):
663 This variable conditionally defines HAS_GETPGRP if getpgrp() is
664 available to get the current process group.
665
666d_getppid (d_getppid.U):
667 This variable conditionally defines the HAS_GETPPID symbol, which
668 indicates to the C program that the getppid() routine is available
669 to get the parent process ID.
670
671d_getprior (d_getprior.U):
672 This variable conditionally defines HAS_GETPRIORITY if getpriority()
673 is available to get a process's priority.
674
675d_getprotoprotos (d_getprotoprotos.U):
676 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
677 which indicates to the C program that <netdb.h> supplies
678 prototypes for the various getproto*() functions.
679 See also netdbtype.U for probing for various netdb types.
680
681d_getpwent (d_getpwent.U):
682 This variable conditionally defines the HAS_GETPWENT symbol, which
683 indicates to the C program that the getpwent() routine is available
684 for sequential access of the passwd database.
685
686d_getsbyname (d_getsrvby.U):
687 This variable conditionally defines the HAS_GETSERVBYNAME
688 symbol, which indicates to the C program that the
689 getservbyname() routine is available to look up services
690 by their name.
691
692d_getsbyport (d_getsrvby.U):
693 This variable conditionally defines the HAS_GETSERVBYPORT
694 symbol, which indicates to the C program that the
695 getservbyport() routine is available to look up services
696 by their port.
697
698d_getsent (d_getsent.U):
699 This variable conditionally defines HAS_GETSERVENT if getservent() is
700 available to look up network services in some data base or another.
701
702d_getservprotos (d_getservprotos.U):
703 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
704 which indicates to the C program that <netdb.h> supplies
705 prototypes for the various getserv*() functions.
706 See also netdbtype.U for probing for various netdb types.
707
708d_getspent (d_getspent.U):
709 This variable conditionally defines HAS_GETSPENT if getspent() is
710 available to retrieve SysV shadow password entries sequentially.
711
712d_getspnam (d_getspnam.U):
713 This variable conditionally defines HAS_GETSPNAM if getspnam() is
714 available to retrieve SysV shadow password entries by name.
715
716d_gettimeod (d_ftime.U):
717 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
718 indicates that the gettimeofday() system call exists (to obtain a
719 sub-second accuracy clock). You should probably include <sys/resource.h>.
720
721d_gnulibc (d_gnulibc.U):
722 Defined if we're dealing with the GNU C Library.
723
724d_grpasswd (i_grp.U):
725 This variable conditionally defines GRPASSWD, which indicates
726 that struct group in <grp.h> contains gr_passwd.
727
728d_hasmntopt (d_hasmntopt.U):
729 This variable conditionally defines the HAS_HASMNTOPT symbol, which
730 indicates to the C program that the hasmntopt() routine is available
731 to query the mount options of file systems.
732
733d_htonl (d_htonl.U):
734 This variable conditionally defines HAS_HTONL if htonl() and its
735 friends are available to do network order byte swapping.
736
737d_index (d_strchr.U):
738 This variable conditionally defines HAS_INDEX if index() and
739 rindex() are available for string searching.
740
741d_inetaton (d_inetaton.U):
742 This variable conditionally defines the HAS_INET_ATON symbol, which
743 indicates to the C program that the inet_aton() function is available
744 to parse IP address "dotted-quad" strings.
745
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746d_int64t (i_inttypes.U):
747 This symbol will be defined if the C compiler supports int64_t.
748
749d_iovec_s (i_sysuio.U):
750 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
751 which indicates that the struct iovec is supported.
752
753d_isascii (d_isascii.U):
754 This variable conditionally defines the HAS_ISASCII constant,
755 which indicates to the C program that isascii() is available.
756
757d_killpg (d_killpg.U):
758 This variable conditionally defines the HAS_KILLPG symbol, which
759 indicates to the C program that the killpg() routine is available
760 to kill process groups.
761
762d_lchown (d_lchown.U):
763 This variable conditionally defines the HAS_LCHOWN symbol, which
764 indicates to the C program that the lchown() routine is available
765 to operate on a symbolic link (instead of following the link).
766
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767d_ldbl_dig (d_ldbl_dig.U):
768 This variable conditionally defines d_ldbl_dig if this system's
769 header files provide LDBL_DIG, which is the number of significant
770 digits in a long double precision number.
771
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772d_link (d_link.U):
773 This variable conditionally defines HAS_LINK if link() is
774 available to create hard links.
775
776d_llseek (io64.U):
777 This variable conditionally defines the HAS_LLSEEK symbol, which
778 indicates to the C program that the llseek() routine is available.
779
780d_locconv (d_locconv.U):
781 This variable conditionally defines HAS_LOCALECONV if localeconv() is
782 available for numeric and monetary formatting conventions.
783
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784d_lockf (d_lockf.U):
785 This variable conditionally defines HAS_LOCKF if lockf() is
786 available to do file locking.
787
788d_longdbl (d_longdbl.U):
789 This variable conditionally defines HAS_LONG_DOUBLE if
790 the long double type is supported.
791
792d_longlong (d_longlong.U):
793 This variable conditionally defines HAS_LONG_LONG if
794 the long long type is supported.
795
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796d_lstat (d_lstat.U):
797 This variable conditionally defines HAS_LSTAT if lstat() is
798 available to do file stats on symbolic links.
799
800d_madvise (d_madvise.U):
801 This variable conditionally defines HAS_MADVISE if madvise() is
802 available to map a file into memory.
803
804d_mblen (d_mblen.U):
805 This variable conditionally defines the HAS_MBLEN symbol, which
806 indicates to the C program that the mblen() routine is available
807 to find the number of bytes in a multibye character.
808
809d_mbstowcs (d_mbstowcs.U):
810 This variable conditionally defines the HAS_MBSTOWCS symbol, which
811 indicates to the C program that the mbstowcs() routine is available
812 to convert a multibyte string into a wide character string.
813
814d_mbtowc (d_mbtowc.U):
815 This variable conditionally defines the HAS_MBTOWC symbol, which
816 indicates to the C program that the mbtowc() routine is available
817 to convert multibyte to a wide character.
818
819d_memchr (d_memchr.U):
820 This variable conditionally defines the HAS_MEMCHR symbol, which
821 indicates to the C program that the memchr() routine is available
822 to locate characters within a C string.
823
824d_memcmp (d_memcmp.U):
825 This variable conditionally defines the HAS_MEMCMP symbol, which
826 indicates to the C program that the memcmp() routine is available
827 to compare blocks of memory.
828
829d_memcpy (d_memcpy.U):
830 This variable conditionally defines the HAS_MEMCPY symbol, which
831 indicates to the C program that the memcpy() routine is available
832 to copy blocks of memory.
833
834d_memmove (d_memmove.U):
835 This variable conditionally defines the HAS_MEMMOVE symbol, which
836 indicates to the C program that the memmove() routine is available
837 to copy potentatially overlapping blocks of memory.
838
839d_memset (d_memset.U):
840 This variable conditionally defines the HAS_MEMSET symbol, which
841 indicates to the C program that the memset() routine is available
842 to set blocks of memory.
843
844d_mkdir (d_mkdir.U):
845 This variable conditionally defines the HAS_MKDIR symbol, which
846 indicates to the C program that the mkdir() routine is available
847 to create directories..
848
849d_mkfifo (d_mkfifo.U):
850 This variable conditionally defines the HAS_MKFIFO symbol, which
851 indicates to the C program that the mkfifo() routine is available.
852
853d_mktime (d_mktime.U):
854 This variable conditionally defines the HAS_MKTIME symbol, which
855 indicates to the C program that the mktime() routine is available.
856
857d_mmap (d_mmap.U):
858 This variable conditionally defines HAS_MMAP if mmap() is
859 available to map a file into memory.
860
861d_mprotect (d_mprotect.U):
862 This variable conditionally defines HAS_MPROTECT if mprotect() is
863 available to modify the access protection of a memory mapped file.
864
865d_msg (d_msg.U):
866 This variable conditionally defines the HAS_MSG symbol, which
867 indicates that the entire msg*(2) library is present.
868
869d_msg_ctrunc (d_socket.U):
870 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
871 which indicates that the MSG_CTRUNC is available. #ifdef is
872 not enough because it may be an enum, glibc has been known to do this.
873
874d_msg_dontroute (d_socket.U):
875 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
876 which indicates that the MSG_DONTROUTE is available. #ifdef is
877 not enough because it may be an enum, glibc has been known to do this.
878
879d_msg_oob (d_socket.U):
880 This variable conditionally defines the HAS_MSG_OOB symbol,
881 which indicates that the MSG_OOB is available. #ifdef is
882 not enough because it may be an enum, glibc has been known to do this.
883
884d_msg_peek (d_socket.U):
885 This variable conditionally defines the HAS_MSG_PEEK symbol,
886 which indicates that the MSG_PEEK is available. #ifdef is
887 not enough because it may be an enum, glibc has been known to do this.
888
889d_msg_proxy (d_socket.U):
890 This variable conditionally defines the HAS_MSG_PROXY symbol,
891 which indicates that the MSG_PROXY is available. #ifdef is
892 not enough because it may be an enum, glibc has been known to do this.
893
894d_msgctl (d_msgctl.U):
895 This variable conditionally defines the HAS_MSGCTL symbol, which
896 indicates to the C program that the msgctl() routine is available.
897
898d_msgget (d_msgget.U):
899 This variable conditionally defines the HAS_MSGGET symbol, which
900 indicates to the C program that the msgget() routine is available.
901
902d_msghdr_s (d_socket.U):
903 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
904 which indicates that the struct msghdr is supported.
905
906d_msgrcv (d_msgrcv.U):
907 This variable conditionally defines the HAS_MSGRCV symbol, which
908 indicates to the C program that the msgrcv() routine is available.
909
910d_msgsnd (d_msgsnd.U):
911 This variable conditionally defines the HAS_MSGSND symbol, which
912 indicates to the C program that the msgsnd() routine is available.
913
914d_msync (d_msync.U):
915 This variable conditionally defines HAS_MSYNC if msync() is
916 available to synchronize a mapped file.
917
918d_munmap (d_munmap.U):
919 This variable conditionally defines HAS_MUNMAP if munmap() is
920 available to unmap a region mapped by mmap().
921
922d_mymalloc (mallocsrc.U):
923 This variable conditionally defines MYMALLOC in case other parts
924 of the source want to take special action if MYMALLOC is used.
925 This may include different sorts of profiling or error detection.
926
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927d_nice (d_nice.U):
928 This variable conditionally defines the HAS_NICE symbol, which
929 indicates to the C program that the nice() routine is available.
930
931d_off64_t (io64.U):
932 This symbol will be defined if the C compiler supports off64_t.
933
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934d_old_pthread_create_joinable (d_pthrattrj.U):
935 This variable conditionally defines pthread_create_joinable.
936 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
937
938d_oldpthreads (usethreads.U):
939 This variable conditionally defines the OLD_PTHREADS_API symbol,
940 and indicates that Perl should be built to use the old
8c09e4ca 941 draft POSIX threads API. This is only potentially meaningful if
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942 usethreads is set.
943
944d_oldsock (d_socket.U):
945 This variable conditionally defines the OLDSOCKET symbol, which
946 indicates that the BSD socket interface is based on 4.1c and not 4.2.
947
948d_open3 (d_open3.U):
949 This variable conditionally defines the HAS_OPEN3 manifest constant,
950 which indicates to the C program that the 3 argument version of
951 the open(2) function is available.
952
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953d_pathconf (d_pathconf.U):
954 This variable conditionally defines the HAS_PATHCONF symbol, which
955 indicates to the C program that the pathconf() routine is available
956 to determine file-system related limits and options associated
957 with a given filename.
958
959d_pause (d_pause.U):
960 This variable conditionally defines the HAS_PAUSE symbol, which
961 indicates to the C program that the pause() routine is available
962 to suspend a process until a signal is received.
963
964d_phostname (d_gethname.U):
965 This variable conditionally defines the HAS_PHOSTNAME symbol, which
966 contains the shell command which, when fed to popen(), may be
967 used to derive the host name.
968
969d_pipe (d_pipe.U):
970 This variable conditionally defines the HAS_PIPE symbol, which
971 indicates to the C program that the pipe() routine is available
972 to create an inter-process channel.
973
974d_poll (d_poll.U):
975 This variable conditionally defines the HAS_POLL symbol, which
976 indicates to the C program that the poll() routine is available
977 to poll active file descriptors.
978
979d_portable (d_portable.U):
980 This variable conditionally defines the PORTABLE symbol, which
981 indicates to the C program that it should not assume that it is
982 running on the machine it was compiled on.
983
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984d_PRId64 (quadfio.U):
985 This variable conditionally defines the PERL_PRId64 symbol, which
986 indiciates that stdio has a symbol to print 64-bit decimal numbers.
987
988d_PRIeldbl (longdblfio.U):
989 This variable conditionally defines the PERL_PRIfldlbl symbol, which
990 indiciates that stdio has a symbol to print long doubles.
991
992d_PRIEldbl (longdblfio.U):
993 This variable conditionally defines the PERL_PRIfldlbl symbol, which
994 indiciates that stdio has a symbol to print long doubles.
995
996d_PRIfldbl (longdblfio.U):
997 This variable conditionally defines the PERL_PRIfldlbl symbol, which
998 indiciates that stdio has a symbol to print long doubles.
999
1000d_PRIFldbl (longdblfio.U):
1001 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1002 indiciates that stdio has a symbol to print long doubles.
1003
1004d_PRIgldbl (longdblfio.U):
1005 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1006 indiciates that stdio has a symbol to print long doubles.
1007
1008d_PRIGldbl (longdblfio.U):
1009 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1010 indiciates that stdio has a symbol to print long doubles.
1011
1012d_PRIi64 (quadfio.U):
1013 This variable conditionally defines the PERL_PRIi64 symbol, which
1014 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1015
1016d_PRIo64 (quadfio.U):
1017 This variable conditionally defines the PERL_PRIo64 symbol, which
1018 indiciates that stdio has a symbol to print 64-bit octal numbers.
1019
1020d_PRIu64 (quadfio.U):
1021 This variable conditionally defines the PERL_PRIu64 symbol, which
1022 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1023 numbers.
1024
1025d_PRIx64 (quadfio.U):
1026 This variable conditionally defines the PERL_PRIx64 symbol, which
1027 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1028
1029d_PRIX64 (quadfio.U):
1030 This variable conditionally defines the PERL_PRIX64 symbol, which
1031 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1032
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1033d_pthread_yield (d_pthread_y.U):
1034 This variable conditionally defines the HAS_PTHREAD_YIELD
1035 symbol if the pthread_yield routine is available to yield
1036 the execution of the current thread.
1037
1038d_pwage (i_pwd.U):
1039 This variable conditionally defines PWAGE, which indicates
1040 that struct passwd contains pw_age.
1041
1042d_pwchange (i_pwd.U):
1043 This variable conditionally defines PWCHANGE, which indicates
1044 that struct passwd contains pw_change.
1045
1046d_pwclass (i_pwd.U):
1047 This variable conditionally defines PWCLASS, which indicates
1048 that struct passwd contains pw_class.
1049
1050d_pwcomment (i_pwd.U):
1051 This variable conditionally defines PWCOMMENT, which indicates
1052 that struct passwd contains pw_comment.
1053
1054d_pwexpire (i_pwd.U):
1055 This variable conditionally defines PWEXPIRE, which indicates
1056 that struct passwd contains pw_expire.
1057
1058d_pwgecos (i_pwd.U):
1059 This variable conditionally defines PWGECOS, which indicates
1060 that struct passwd contains pw_gecos.
1061
1062d_pwpasswd (i_pwd.U):
1063 This variable conditionally defines PWPASSWD, which indicates
1064 that struct passwd contains pw_passwd.
1065
1066d_pwquota (i_pwd.U):
1067 This variable conditionally defines PWQUOTA, which indicates
1068 that struct passwd contains pw_quota.
1069
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1070d_readdir (d_readdir.U):
1071 This variable conditionally defines HAS_READDIR if readdir() is
1072 available to read directory entries.
1073
1074d_readlink (d_readlink.U):
1075 This variable conditionally defines the HAS_READLINK symbol, which
1076 indicates to the C program that the readlink() routine is available
1077 to read the value of a symbolic link.
1078
1079d_readv (d_readv.U):
1080 This variable conditionally defines the HAS_READV symbol, which
1081 indicates to the C program that the readv() routine is available.
1082
1083d_recvmsg (d_socket.U):
1084 This variable conditionally defines the HAS_RECVMSG symbol,
1085 which indicates that the recvmsg is supported.
1086
1087d_rename (d_rename.U):
1088 This variable conditionally defines the HAS_RENAME symbol, which
1089 indicates to the C program that the rename() routine is available
1090 to rename files.
1091
1092d_rewinddir (d_readdir.U):
1093 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1094 available.
1095
1096d_rmdir (d_rmdir.U):
1097 This variable conditionally defines HAS_RMDIR if rmdir() is
1098 available to remove directories.
1099
1100d_safebcpy (d_safebcpy.U):
1101 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1102 the bcopy() routine can do overlapping copies.
1103
1104d_safemcpy (d_safemcpy.U):
1105 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1106 the memcpy() routine can do overlapping copies.
1107
1108d_sanemcmp (d_sanemcmp.U):
1109 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1110 the memcpy() routine is available and can be used to compare relative
1111 magnitudes of chars with their high bits set.
1112
1113d_sched_yield (d_pthread_y.U):
1114 This variable conditionally defines the HAS_SCHED_YIELD
1115 symbol if the sched_yield routine is available to yield
1116 the execution of the current thread.
1117
1118d_scm_rights (d_socket.U):
1119 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1120 which indicates that the SCM_RIGHTS is available. #ifdef is
1121 not enough because it may be an enum, glibc has been known to do this.
1122
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1123d_seekdir (d_readdir.U):
1124 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1125 available.
1126
1127d_select (d_select.U):
1128 This variable conditionally defines HAS_SELECT if select() is
1129 available to select active file descriptors. A <sys/time.h>
1130 inclusion may be necessary for the timeout field.
1131
1132d_sem (d_sem.U):
1133 This variable conditionally defines the HAS_SEM symbol, which
1134 indicates that the entire sem*(2) library is present.
1135
1136d_semctl (d_semctl.U):
1137 This variable conditionally defines the HAS_SEMCTL symbol, which
1138 indicates to the C program that the semctl() routine is available.
1139
1140d_semctl_semid_ds (d_union_semun.U):
1141 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1142 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1143
1144d_semctl_semun (d_union_semun.U):
1145 This variable conditionally defines USE_SEMCTL_SEMUN, which
1146 indicates that union semun is to be used for semctl IPC_STAT.
1147
1148d_semget (d_semget.U):
1149 This variable conditionally defines the HAS_SEMGET symbol, which
1150 indicates to the C program that the semget() routine is available.
1151
1152d_semop (d_semop.U):
1153 This variable conditionally defines the HAS_SEMOP symbol, which
1154 indicates to the C program that the semop() routine is available.
1155
1156d_sendmsg (d_socket.U):
1157 This variable conditionally defines the HAS_SENDMSG symbol,
1158 which indicates that the sendmsg is supported.
1159
1160d_setegid (d_setegid.U):
1161 This variable conditionally defines the HAS_SETEGID symbol, which
1162 indicates to the C program that the setegid() routine is available
1163 to change the effective gid of the current program.
1164
1165d_seteuid (d_seteuid.U):
1166 This variable conditionally defines the HAS_SETEUID symbol, which
1167 indicates to the C program that the seteuid() routine is available
1168 to change the effective uid of the current program.
1169
1170d_setgrent (d_setgrent.U):
1171 This variable conditionally defines the HAS_SETGRENT symbol, which
1172 indicates to the C program that the setgrent() routine is available
1173 for initializing sequential access to the group database.
1174
1175d_setgrps (d_setgrps.U):
1176 This variable conditionally defines the HAS_SETGROUPS symbol, which
1177 indicates to the C program that the setgroups() routine is available
1178 to set the list of process groups.
1179
1180d_sethent (d_sethent.U):
1181 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1182 available.
1183
1184d_setlinebuf (d_setlnbuf.U):
1185 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1186 indicates to the C program that the setlinebuf() routine is available
1187 to change stderr or stdout from block-buffered or unbuffered to a
1188 line-buffered mode.
1189
1190d_setlocale (d_setlocale.U):
1191 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1192 available to handle locale-specific ctype implementations.
1193
1194d_setnent (d_setnent.U):
1195 This variable conditionally defines HAS_SETNETENT if setnetent() is
1196 available.
1197
1198d_setpent (d_setpent.U):
1199 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1200 available.
1201
1202d_setpgid (d_setpgid.U):
1203 This variable conditionally defines the HAS_SETPGID symbol if the
1204 setpgid(pid, gpid) function is available to set process group ID.
1205
1206d_setpgrp2 (d_setpgrp2.U):
1207 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1208 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1209 is available to set the current process group.
1210
1211d_setpgrp (d_setpgrp.U):
1212 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1213 available to set the current process group.
1214
1215d_setprior (d_setprior.U):
1216 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1217 is available to set a process's priority.
1218
1219d_setpwent (d_setpwent.U):
1220 This variable conditionally defines the HAS_SETPWENT symbol, which
1221 indicates to the C program that the setpwent() routine is available
1222 for initializing sequential access to the passwd database.
1223
1224d_setregid (d_setregid.U):
1225 This variable conditionally defines HAS_SETREGID if setregid() is
1226 available to change the real and effective gid of the current
1227 process.
1228
1229d_setresgid (d_setregid.U):
1230 This variable conditionally defines HAS_SETRESGID if setresgid() is
1231 available to change the real, effective and saved gid of the current
1232 process.
1233
1234d_setresuid (d_setreuid.U):
1235 This variable conditionally defines HAS_SETREUID if setresuid() is
1236 available to change the real, effective and saved uid of the current
1237 process.
1238
1239d_setreuid (d_setreuid.U):
1240 This variable conditionally defines HAS_SETREUID if setreuid() is
1241 available to change the real and effective uid of the current
1242 process.
1243
1244d_setrgid (d_setrgid.U):
1245 This variable conditionally defines the HAS_SETRGID symbol, which
1246 indicates to the C program that the setrgid() routine is available
1247 to change the real gid of the current program.
1248
1249d_setruid (d_setruid.U):
1250 This variable conditionally defines the HAS_SETRUID symbol, which
1251 indicates to the C program that the setruid() routine is available
1252 to change the real uid of the current program.
1253
1254d_setsent (d_setsent.U):
1255 This variable conditionally defines HAS_SETSERVENT if setservent() is
1256 available.
1257
1258d_setsid (d_setsid.U):
1259 This variable conditionally defines HAS_SETSID if setsid() is
1260 available to set the process group ID.
1261
1262d_setspent (d_setspent.U):
1263 This variable conditionally defines HAS_SETSPENT if setspent() is
1264 available to initialize the scan of SysV shadow password entries.
1265
1266d_setvbuf (d_setvbuf.U):
1267 This variable conditionally defines the HAS_SETVBUF symbol, which
1268 indicates to the C program that the setvbuf() routine is available
1269 to change buffering on an open stdio stream.
1270
1271d_sfio (d_sfio.U):
1272 This variable conditionally defines the USE_SFIO symbol,
1273 and indicates whether sfio is available (and should be used).
1274
1275d_shm (d_shm.U):
1276 This variable conditionally defines the HAS_SHM symbol, which
1277 indicates that the entire shm*(2) library is present.
1278
1279d_shmat (d_shmat.U):
1280 This variable conditionally defines the HAS_SHMAT symbol, which
1281 indicates to the C program that the shmat() routine is available.
1282
1283d_shmatprototype (d_shmat.U):
1284 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1285 symbol, which indicates that sys/shm.h has a prototype for
1286 shmat.
1287
1288d_shmctl (d_shmctl.U):
1289 This variable conditionally defines the HAS_SHMCTL symbol, which
1290 indicates to the C program that the shmctl() routine is available.
1291
1292d_shmdt (d_shmdt.U):
1293 This variable conditionally defines the HAS_SHMDT symbol, which
1294 indicates to the C program that the shmdt() routine is available.
1295
1296d_shmget (d_shmget.U):
1297 This variable conditionally defines the HAS_SHMGET symbol, which
1298 indicates to the C program that the shmget() routine is available.
1299
1300d_sigaction (d_sigaction.U):
1301 This variable conditionally defines the HAS_SIGACTION symbol, which
1302 indicates that the Vr4 sigaction() routine is available.
1303
1304d_sigsetjmp (d_sigsetjmp.U):
1305 This variable conditionally defines the HAS_SIGSETJMP symbol,
1306 which indicates that the sigsetjmp() routine is available to
1307 call setjmp() and optionally save the process's signal mask.
1308
1309d_socket (d_socket.U):
1310 This variable conditionally defines HAS_SOCKET, which indicates
1311 that the BSD socket interface is supported.
1312
1313d_sockpair (d_socket.U):
1314 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1315 indicates that the BSD socketpair() is supported.
1316
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1317d_sqrtl (d_sqrtl.U):
1318 This variable conditionally defines the HAS_SQRTL symbol, which
1319 indicates to the C program that the sqrtl() routine is available.
1320
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1321d_statblks (d_statblks.U):
1322 This variable conditionally defines USE_STAT_BLOCKS
1323 if this system has a stat structure declaring
1324 st_blksize and st_blocks.
1325
1326d_statfs (d_statfs.U):
1327 This variable conditionally defines the HAS_STATFS symbol, which
1328 indicates to the C program that the statfs() routine is available.
1329
1330d_statfsflags (d_statfs.U):
1331 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1332 symbol, which indicates to struct statfs from has f_flags member.
1333 This kind of struct statfs is coming from sys/mount.h (BSD),
1334 not from sys/statfs.h (SYSV).
1335
1336d_statvfs (d_statvfs.U):
1337 This variable conditionally defines the HAS_STATVFS symbol, which
1338 indicates to the C program that the statvfs() routine is available.
1339
1340d_stdio_cnt_lval (d_stdstdio.U):
1341 This variable conditionally defines STDIO_CNT_LVALUE if the
1342 FILE_cnt macro can be used as an lvalue.
1343
1344d_stdio_ptr_lval (d_stdstdio.U):
1345 This variable conditionally defines STDIO_PTR_LVALUE if the
1346 FILE_ptr macro can be used as an lvalue.
1347
1348d_stdio_stream_array (stdio_streams.U):
1349 This variable tells whether there is an array holding
1350 the stdio streams.
1351
1352d_stdiobase (d_stdstdio.U):
1353 This variable conditionally defines USE_STDIO_BASE if this system
1354 has a FILE structure declaring a usable _base field (or equivalent)
1355 in stdio.h.
1356
1357d_stdstdio (d_stdstdio.U):
1358 This variable conditionally defines USE_STDIO_PTR if this system
1359 has a FILE structure declaring usable _ptr and _cnt fields (or
1360 equivalent) in stdio.h.
1361
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1362d_strchr (d_strchr.U):
1363 This variable conditionally defines HAS_STRCHR if strchr() and
1364 strrchr() are available for string searching.
1365
1366d_strcoll (d_strcoll.U):
1367 This variable conditionally defines HAS_STRCOLL if strcoll() is
1368 available to compare strings using collating information.
1369
1370d_strctcpy (d_strctcpy.U):
1371 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1372 indicates to the C program that this C compiler knows how to copy
1373 structures.
1374
1375d_strerrm (d_strerror.U):
1376 This variable holds what Strerrr is defined as to translate an error
1377 code condition into an error message string. It could be 'strerror'
1378 or a more complex macro emulating strrror with sys_errlist[], or the
1379 "unknown" string when both strerror and sys_errlist are missing.
1380
1381d_strerror (d_strerror.U):
1382 This variable conditionally defines HAS_STRERROR if strerror() is
1383 available to translate error numbers to strings.
1384
1385d_strtod (d_strtod.U):
1386 This variable conditionally defines the HAS_STRTOD symbol, which
1387 indicates to the C program that the strtod() routine is available
1388 to provide better numeric string conversion than atof().
1389
1390d_strtol (d_strtol.U):
1391 This variable conditionally defines the HAS_STRTOL symbol, which
1392 indicates to the C program that the strtol() routine is available
1393 to provide better numeric string conversion than atoi() and friends.
1394
1395d_strtoul (d_strtoul.U):
1396 This variable conditionally defines the HAS_STRTOUL symbol, which
1397 indicates to the C program that the strtoul() routine is available
1398 to provide conversion of strings to unsigned long.
1399
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1400d_strtoull (strtoull.U):
1401 This variable conditionally defines the HAS_STRTOULL symbol, which
1402 indicates to the C program that the strtoull() routine is available.
1403
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1404d_strxfrm (d_strxfrm.U):
1405 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1406 available to transform strings.
1407
1408d_suidsafe (d_dosuid.U):
1409 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1410 if setuid scripts can be secure. This test looks in /dev/fd/.
1411
1412d_symlink (d_symlink.U):
1413 This variable conditionally defines the HAS_SYMLINK symbol, which
1414 indicates to the C program that the symlink() routine is available
1415 to create symbolic links.
1416
1417d_syscall (d_syscall.U):
1418 This variable conditionally defines HAS_SYSCALL if syscall() is
1419 available call arbitrary system calls.
1420
1421d_sysconf (d_sysconf.U):
1422 This variable conditionally defines the HAS_SYSCONF symbol, which
1423 indicates to the C program that the sysconf() routine is available
1424 to determine system related limits and options.
1425
1426d_sysernlst (d_strerror.U):
1427 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1428 is available to translate error numbers to the symbolic name.
1429
1430d_syserrlst (d_strerror.U):
1431 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1432 available to translate error numbers to strings.
1433
1434d_system (d_system.U):
1435 This variable conditionally defines HAS_SYSTEM if system() is
1436 available to issue a shell command.
1437
1438d_tcgetpgrp (d_tcgtpgrp.U):
1439 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1440 indicates to the C program that the tcgetpgrp() routine is available.
1441 to get foreground process group ID.
1442
1443d_tcsetpgrp (d_tcstpgrp.U):
1444 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1445 indicates to the C program that the tcsetpgrp() routine is available
1446 to set foreground process group ID.
1447
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1448d_telldir (d_readdir.U):
1449 This variable conditionally defines HAS_TELLDIR if telldir() is
1450 available.
1451
1452d_telldirproto (d_telldirproto.U):
1453 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1454 which indicates to the C program that the system provides
1455 a prototype for the telldir() function. Otherwise, it is
1456 up to the program to supply one.
1457
1458d_time (d_time.U):
1459 This variable conditionally defines the HAS_TIME symbol, which indicates
1460 that the time() routine exists. The time() routine is normaly
1461 provided on UNIX systems.
1462
1463d_times (d_times.U):
1464 This variable conditionally defines the HAS_TIMES symbol, which indicates
1465 that the times() routine exists. The times() routine is normaly
1466 provided on UNIX systems. You may have to include <sys/times.h>.
1467
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1468d_truncate (d_truncate.U):
1469 This variable conditionally defines HAS_TRUNCATE if truncate() is
1470 available to truncate files.
1471
1472d_tzname (d_tzname.U):
1473 This variable conditionally defines HAS_TZNAME if tzname[] is
1474 available to access timezone names.
1475
1476d_umask (d_umask.U):
1477 This variable conditionally defines the HAS_UMASK symbol, which
1478 indicates to the C program that the umask() routine is available.
1479 to set and get the value of the file creation mask.
1480
1481d_uname (d_gethname.U):
1482 This variable conditionally defines the HAS_UNAME symbol, which
1483 indicates to the C program that the uname() routine may be
1484 used to derive the host name.
1485
1486d_union_semun (d_union_semun.U):
1487 This variable conditionally defines HAS_UNION_SEMUN if the
1488 union semun is defined by including <sys/sem.h>.
1489
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1490d_vendorlib (vendorlib.U):
1491 This variable conditionally defines PERL_VENDORLIB.
1492
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1493d_vfork (d_vfork.U):
1494 This variable conditionally defines the HAS_VFORK symbol, which
1495 indicates the vfork() routine is available.
1496
1497d_void_closedir (d_closedir.U):
1498 This variable conditionally defines VOID_CLOSEDIR if closedir()
1499 does not return a value.
1500
1501d_voidsig (d_voidsig.U):
1502 This variable conditionally defines VOIDSIG if this system
1503 declares "void (*signal(...))()" in signal.h. The old way was to
1504 declare it as "int (*signal(...))()".
1505
1506d_voidtty (i_sysioctl.U):
1507 This variable conditionally defines USE_IOCNOTTY to indicate that the
1508 ioctl() call with TIOCNOTTY should be used to void tty association.
1509 Otherwise (on USG probably), it is enough to close the standard file
1510 decriptors and do a setpgrp().
1511
1512d_volatile (d_volatile.U):
1513 This variable conditionally defines the HASVOLATILE symbol, which
1514 indicates to the C program that this C compiler knows about the
1515 volatile declaration.
1516
1517d_vprintf (d_vprintf.U):
1518 This variable conditionally defines the HAS_VPRINTF symbol, which
1519 indicates to the C program that the vprintf() routine is available
1520 to printf with a pointer to an argument list.
1521
1522d_wait4 (d_wait4.U):
1523 This variable conditionally defines the HAS_WAIT4 symbol, which
1524 indicates the wait4() routine is available.
1525
1526d_waitpid (d_waitpid.U):
1527 This variable conditionally defines HAS_WAITPID if waitpid() is
1528 available to wait for child process.
1529
1530d_wcstombs (d_wcstombs.U):
1531 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1532 indicates to the C program that the wcstombs() routine is available
1533 to convert wide character strings to multibyte strings.
1534
1535d_wctomb (d_wctomb.U):
1536 This variable conditionally defines the HAS_WCTOMB symbol, which
1537 indicates to the C program that the wctomb() routine is available
1538 to convert a wide character to a multibyte.
1539
1540d_writev (d_writev.U):
1541 This variable conditionally defines the HAS_WRITEV symbol, which
1542 indicates to the C program that the writev() routine is available.
1543
1544d_xenix (Guess.U):
1545 This variable conditionally defines the symbol XENIX, which alerts
1546 the C program that it runs under Xenix.
1547
1548date (Loc.U):
5bf26616 1549 This variable is used internally by Configure to determine the
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1550 full pathname (if any) of the date program. After Configure runs,
1551 the value is reset to a plain "date" and is not useful.
1552
1553db_hashtype (i_db.U):
1554 This variable contains the type of the hash structure element
1555 in the <db.h> header file. In older versions of DB, it was
1556 int, while in newer ones it is u_int32_t.
1557
1558db_prefixtype (i_db.U):
1559 This variable contains the type of the prefix structure element
1560 in the <db.h> header file. In older versions of DB, it was
1561 int, while in newer ones it is size_t.
1562
1563defvoidused (voidflags.U):
1564 This variable contains the default value of the VOIDUSED symbol (15).
1565
1566direntrytype (i_dirent.U):
1567 This symbol is set to 'struct direct' or 'struct dirent' depending on
1568 whether dirent is available or not. You should use this pseudo type to
1569 portably declare your directory entries.
1570
1571dlext (dlext.U):
1572 This variable contains the extension that is to be used for the
1573 dynamically loaded modules that perl generaties.
1574
1575dlsrc (dlsrc.U):
1576 This variable contains the name of the dynamic loading file that
1577 will be used with the package.
1578
1579doublesize (doublesize.U):
1580 This variable contains the value of the DOUBLESIZE symbol, which
1581 indicates to the C program how many bytes there are in a double.
1582
1583drand01 (randfunc.U):
1584 Indicates the macro to be used to generate normalized
1585 random numbers. Uses randfunc, often divided by
1586 (double) (((unsigned long) 1 << randbits)) in order to
1587 normalize the result.
1588 In C programs, the macro 'Drand01' is mapped to drand01.
1589
1590dynamic_ext (Extensions.U):
1591 This variable holds a list of XS extension files we want to
1592 link dynamically into the package. It is used by Makefile.
1593
1594eagain (nblock_io.U):
1595 This variable bears the symbolic errno code set by read() when no
1596 data is present on the file and non-blocking I/O was enabled (otherwise,
1597 read() blocks naturally).
1598
1599ebcdic (ebcdic.U):
1600 This variable conditionally defines EBCDIC if this
1601 system uses EBCDIC encoding. Among other things, this
1602 means that the character ranges are not contiguous.
1603 See trnl.U
1604
1605echo (Loc.U):
5bf26616 1606 This variable is used internally by Configure to determine the
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1607 full pathname (if any) of the echo program. After Configure runs,
1608 the value is reset to a plain "echo" and is not useful.
1609
1610egrep (Loc.U):
5bf26616 1611 This variable is used internally by Configure to determine the
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1612 full pathname (if any) of the egrep program. After Configure runs,
1613 the value is reset to a plain "egrep" and is not useful.
1614
1615emacs (Loc.U):
1616 This variable is defined but not used by Configure.
1617 The value is a plain '' and is not useful.
1618
1619eunicefix (Init.U):
1620 When running under Eunice this variable contains a command which will
1621 convert a shell script to the proper form of text file for it to be
1622 executable by the shell. On other systems it is a no-op.
1623
1624exe_ext (Unix.U):
1625 This is an old synonym for _exe.
1626
1627expr (Loc.U):
5bf26616 1628 This variable is used internally by Configure to determine the
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1629 full pathname (if any) of the expr program. After Configure runs,
1630 the value is reset to a plain "expr" and is not useful.
1631
1632extensions (Extensions.U):
1633 This variable holds a list of all extension files (both XS and
1634 non-xs linked into the package. It is propagated to Config.pm
1635 and is typically used to test whether a particular extesion
1636 is available.
1637
1638fflushall (fflushall.U):
1639 This symbol, if defined, tells that to flush
1640 all pending stdio output one must loop through all
1641 the stdio file handles stored in an array and fflush them.
1642 Note that if fflushNULL is defined, fflushall will not
1643 even be probed for and will be left undefined.
1644
1645fflushNULL (fflushall.U):
1646 This symbol, if defined, tells that fflush(NULL) does flush
1647 all pending stdio output.
1648
1649find (Loc.U):
1650 This variable is defined but not used by Configure.
1651 The value is a plain '' and is not useful.
1652
1653firstmakefile (Unix.U):
1654 This variable defines the first file searched by make. On unix,
1655 it is makefile (then Makefile). On case-insensitive systems,
1656 it might be something else. This is only used to deal with
1657 convoluted make depend tricks.
1658
1659flex (Loc.U):
1660 This variable is defined but not used by Configure.
1661 The value is a plain '' and is not useful.
1662
1663fpostype (fpostype.U):
1664 This variable defines Fpos_t to be something like fpost_t, long,
1665 uint, or whatever type is used to declare file positions in libc.
1666
1667freetype (mallocsrc.U):
1668 This variable contains the return type of free(). It is usually
1669 void, but occasionally int.
1670
1671full_ar (Loc_ar.U):
1672 This variable contains the full pathname to 'ar', whether or
1673 not the user has specified 'portability'. This is only used
1674 in the Makefile.SH.
1675
1676full_csh (d_csh.U):
1677 This variable contains the full pathname to 'csh', whether or
1678 not the user has specified 'portability'. This is only used
1679 in the compiled C program, and we assume that all systems which
1680 can share this executable will have the same full pathname to
1681 'csh.'
1682
1683full_sed (Loc_sed.U):
1684 This variable contains the full pathname to 'sed', whether or
1685 not the user has specified 'portability'. This is only used
1686 in the compiled C program, and we assume that all systems which
1687 can share this executable will have the same full pathname to
1688 'sed.'
1689
1690gccversion (cc.U):
1691 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1692 indicate whether the compiler is version 1 or 2. This is used in
1693 setting some of the default cflags. It is set to '' if not gcc.
1694
1695gidtype (gidtype.U):
1696 This variable defines Gid_t to be something like gid_t, int,
1697 ushort, or whatever type is used to declare the return type
1698 of getgid(). Typically, it is the type of group ids in the kernel.
1699
1700glibpth (libpth.U):
1701 This variable holds the general path (space-separated) used to
1702 find libraries. It may contain directories that do not exist on
1703 this platform, libpth is the cleaned-up version.
1704
1705grep (Loc.U):
5bf26616 1706 This variable is used internally by Configure to determine the
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1707 full pathname (if any) of the grep program. After Configure runs,
1708 the value is reset to a plain "grep" and is not useful.
1709
1710groupcat (nis.U):
1711 This variable contains a command that produces the text of the
1712 /etc/group file. This is normally "cat /etc/group", but can be
1713 "ypcat group" when NIS is used.
1714
1715groupstype (groupstype.U):
1716 This variable defines Groups_t to be something like gid_t, int,
1717 ushort, or whatever type is used for the second argument to
1718 getgroups() and setgroups(). Usually, this is the same as
1719 gidtype (gid_t), but sometimes it isn't.
1720
1721gzip (Loc.U):
5bf26616 1722 This variable is used internally by Configure to determine the
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1723 full pathname (if any) of the gzip program. After Configure runs,
1724 the value is reset to a plain "gzip" and is not useful.
1725
1726h_fcntl (h_fcntl.U):
1727 This is variable gets set in various places to tell i_fcntl that
1728 <fcntl.h> should be included.
1729
1730h_sysfile (h_sysfile.U):
1731 This is variable gets set in various places to tell i_sys_file that
1732 <sys/file.h> should be included.
1733
1734hint (Oldconfig.U):
1735 Gives the type of hints used for previous answers. May be one of
1736 "default", "recommended" or "previous".
1737
1738hostcat (nis.U):
1739 This variable contains a command that produces the text of the
1740 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1741 "ypcat hosts" when NIS is used.
1742
1743huge (models.U):
1744 This variable contains a flag which will tell the C compiler and loader
1745 to produce a program running with a huge memory model. If the
1746 huge model is not supported, contains the flag to produce large
1747 model programs. It is up to the Makefile to use this.
1748
1749i_arpainet (i_arpainet.U):
1750 This variable conditionally defines the I_ARPA_INET symbol,
1751 and indicates whether a C program should include <arpa/inet.h>.
1752
1753i_bsdioctl (i_sysioctl.U):
1754 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1755 indicates to the C program that <sys/bsdioctl.h> exists and should
1756 be included.
1757
1758i_db (i_db.U):
1759 This variable conditionally defines the I_DB symbol, and indicates
1760 whether a C program may include Berkeley's DB include file <db.h>.
1761
1762i_dbm (i_dbm.U):
1763 This variable conditionally defines the I_DBM symbol, which
1764 indicates to the C program that <dbm.h> exists and should
1765 be included.
1766
1767i_dirent (i_dirent.U):
1768 This variable conditionally defines I_DIRENT, which indicates
1769 to the C program that it should include <dirent.h>.
1770
1771i_dld (i_dld.U):
1772 This variable conditionally defines the I_DLD symbol, which
1773 indicates to the C program that <dld.h> (GNU dynamic loading)
1774 exists and should be included.
1775
1776i_dlfcn (i_dlfcn.U):
1777 This variable conditionally defines the I_DLFCN symbol, which
1778 indicates to the C program that <dlfcn.h> exists and should
1779 be included.
1780
1781i_fcntl (i_fcntl.U):
1782 This variable controls the value of I_FCNTL (which tells
1783 the C program to include <fcntl.h>).
1784
1785i_float (i_float.U):
1786 This variable conditionally defines the I_FLOAT symbol, and indicates
1787 whether a C program may include <float.h> to get symbols like DBL_MAX
1788 or DBL_MIN, i.e. machine dependent floating point values.
1789
1790i_gdbm (i_gdbm.U):
1791 This variable conditionally defines the I_GDBM symbol, which
1792 indicates to the C program that <gdbm.h> exists and should
1793 be included.
1794
1795i_grp (i_grp.U):
1796 This variable conditionally defines the I_GRP symbol, and indicates
1797 whether a C program should include <grp.h>.
1798
1799i_inttypes (i_inttypes.U):
1800 This variable conditionally defines the I_INTTYPES symbol,
1801 and indicates whether a C program should include <inttypes.h>.
1802
1803i_limits (i_limits.U):
1804 This variable conditionally defines the I_LIMITS symbol, and indicates
1805 whether a C program may include <limits.h> to get symbols like WORD_BIT
1806 and friends.
1807
1808i_locale (i_locale.U):
1809 This variable conditionally defines the I_LOCALE symbol,
1810 and indicates whether a C program should include <locale.h>.
1811
1812i_machcthr (i_machcthr.U):
1813 This variable conditionally defines the I_MACH_CTHREADS symbol,
1814 and indicates whether a C program should include <mach/cthreads.h>.
1815
1816i_malloc (i_malloc.U):
1817 This variable conditionally defines the I_MALLOC symbol, and indicates
1818 whether a C program should include <malloc.h>.
1819
1820i_math (i_math.U):
1821 This variable conditionally defines the I_MATH symbol, and indicates
1822 whether a C program may include <math.h>.
1823
1824i_memory (i_memory.U):
1825 This variable conditionally defines the I_MEMORY symbol, and indicates
1826 whether a C program should include <memory.h>.
1827
1828i_mntent (i_mntent.U):
1829 This variable conditionally defines the I_MNTENT symbol, and indicates
1830 whether a C program should include <mntent.h>.
1831
1832i_ndbm (i_ndbm.U):
1833 This variable conditionally defines the I_NDBM symbol, which
1834 indicates to the C program that <ndbm.h> exists and should
1835 be included.
1836
1837i_netdb (i_netdb.U):
1838 This variable conditionally defines the I_NETDB symbol, and indicates
1839 whether a C program should include <netdb.h>.
1840
1841i_neterrno (i_neterrno.U):
1842 This variable conditionally defines the I_NET_ERRNO symbol, which
1843 indicates to the C program that <net/errno.h> exists and should
1844 be included.
1845
1846i_netinettcp (i_netinettcp.U):
1847 This variable conditionally defines the I_NETINET_TCP symbol,
1848 and indicates whether a C program should include <netinet/tcp.h>.
1849
1850i_niin (i_niin.U):
1851 This variable conditionally defines I_NETINET_IN, which indicates
1852 to the C program that it should include <netinet/in.h>. Otherwise,
1853 you may try <sys/in.h>.
1854
1855i_poll (i_poll.U):
1856 This variable conditionally defines the I_POLL symbol, and indicates
1857 whether a C program should include <poll.h>.
1858
1859i_pthread (i_pthread.U):
190b66db 1860 This variable conditionally defines the I_PTHREAD symbol,
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1861 and indicates whether a C program should include <pthread.h>.
1862
1863i_pwd (i_pwd.U):
1864 This variable conditionally defines I_PWD, which indicates
1865 to the C program that it should include <pwd.h>.
1866
1867i_rpcsvcdbm (i_dbm.U):
1868 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1869 indicates to the C program that <rpcsvc/dbm.h> exists and should
1870 be included. Some System V systems might need this instead of <dbm.h>.
1871
1872i_sfio (i_sfio.U):
1873 This variable conditionally defines the I_SFIO symbol,
1874 and indicates whether a C program should include <sfio.h>.
1875
1876i_sgtty (i_termio.U):
1877 This variable conditionally defines the I_SGTTY symbol, which
1878 indicates to the C program that it should include <sgtty.h> rather
1879 than <termio.h>.
1880
1881i_shadow (i_shadow.U):
1882 This variable conditionally defines the I_SHADOW symbol, and indicates
1883 whether a C program should include <shadow.h>.
1884
1885i_socks (i_socks.U):
1886 This variable conditionally defines the I_SOCKS symbol, and indicates
1887 whether a C program should include <socks.h>.
1888
1889i_stdarg (i_varhdr.U):
1890 This variable conditionally defines the I_STDARG symbol, which
1891 indicates to the C program that <stdarg.h> exists and should
1892 be included.
1893
1894i_stddef (i_stddef.U):
1895 This variable conditionally defines the I_STDDEF symbol, which
1896 indicates to the C program that <stddef.h> exists and should
1897 be included.
1898
1899i_stdlib (i_stdlib.U):
1900 This variable conditionally defines the I_STDLIB symbol, which
1901 indicates to the C program that <stdlib.h> exists and should
1902 be included.
1903
1904i_string (i_string.U):
1905 This variable conditionally defines the I_STRING symbol, which
1906 indicates that <string.h> should be included rather than <strings.h>.
1907
1908i_sysaccess (i_sysaccess.U):
1909 This variable conditionally defines the I_SYS_ACCESS symbol,
1910 and indicates whether a C program should include <sys/access.h>.
1911
1912i_sysdir (i_sysdir.U):
1913 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1914 whether a C program should include <sys/dir.h>.
1915
1916i_sysfile (i_sysfile.U):
1917 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1918 whether a C program should include <sys/file.h> to get R_OK and friends.
1919
1920i_sysfilio (i_sysioctl.U):
1921 This variable conditionally defines the I_SYS_FILIO symbol, which
1922 indicates to the C program that <sys/filio.h> exists and should
1923 be included in preference to <sys/ioctl.h>.
1924
1925i_sysin (i_niin.U):
1926 This variable conditionally defines I_SYS_IN, which indicates
1927 to the C program that it should include <sys/in.h> instead of
1928 <netinet/in.h>.
1929
1930i_sysioctl (i_sysioctl.U):
1931 This variable conditionally defines the I_SYS_IOCTL symbol, which
1932 indicates to the C program that <sys/ioctl.h> exists and should
1933 be included.
1934
1935i_sysmman (i_sysmman.U):
1936 This variable conditionally defines the I_SYS_MMAN symbol, and
1937 indicates whether a C program should include <sys/mman.h>.
1938
1939i_sysmount (i_sysmount.U):
1940 This variable conditionally defines the I_SYSMOUNT symbol,
1941 and indicates whether a C program should include <sys/mount.h>.
1942
1943i_sysndir (i_sysndir.U):
1944 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1945 whether a C program should include <sys/ndir.h>.
1946
1947i_sysparam (i_sysparam.U):
1948 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1949 whether a C program should include <sys/param.h>.
1950
1951i_sysresrc (i_sysresrc.U):
1952 This variable conditionally defines the I_SYS_RESOURCE symbol,
1953 and indicates whether a C program should include <sys/resource.h>.
1954
1955i_syssecrt (i_syssecrt.U):
1956 This variable conditionally defines the I_SYS_SECURITY symbol,
1957 and indicates whether a C program should include <sys/security.h>.
1958
1959i_sysselct (i_sysselct.U):
1960 This variable conditionally defines I_SYS_SELECT, which indicates
1961 to the C program that it should include <sys/select.h> in order to
1962 get the definition of struct timeval.
1963
1964i_syssockio (i_sysioctl.U):
1965 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1966 C program that socket ioctl codes may be found in <sys/sockio.h>
1967 instead of <sys/ioctl.h>.
1968
1969i_sysstat (i_sysstat.U):
1970 This variable conditionally defines the I_SYS_STAT symbol,
1971 and indicates whether a C program should include <sys/stat.h>.
1972
1973i_sysstatvfs (i_sysstatvfs.U):
1974 This variable conditionally defines the I_SYSSTATVFS symbol,
1975 and indicates whether a C program should include <sys/statvfs.h>.
1976
1977i_systime (i_time.U):
1978 This variable conditionally defines I_SYS_TIME, which indicates
1979 to the C program that it should include <sys/time.h>.
1980
1981i_systimek (i_time.U):
1982 This variable conditionally defines I_SYS_TIME_KERNEL, which
1983 indicates to the C program that it should include <sys/time.h>
1984 with KERNEL defined.
1985
1986i_systimes (i_systimes.U):
1987 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1988 whether a C program should include <sys/times.h>.
1989
1990i_systypes (i_systypes.U):
1991 This variable conditionally defines the I_SYS_TYPES symbol,
1992 and indicates whether a C program should include <sys/types.h>.
1993
1994i_sysuio (i_sysuio.U):
1995 This variable conditionally defines the I_SYSUIO symbol, and indicates
1996 whether a C program should include <sys/uio.h>.
1997
1998i_sysun (i_sysun.U):
1999 This variable conditionally defines I_SYS_UN, which indicates
2000 to the C program that it should include <sys/un.h> to get UNIX
2001 domain socket definitions.
2002
2003i_syswait (i_syswait.U):
2004 This variable conditionally defines I_SYS_WAIT, which indicates
2005 to the C program that it should include <sys/wait.h>.
2006
2007i_termio (i_termio.U):
2008 This variable conditionally defines the I_TERMIO symbol, which
2009 indicates to the C program that it should include <termio.h> rather
2010 than <sgtty.h>.
2011
2012i_termios (i_termio.U):
2013 This variable conditionally defines the I_TERMIOS symbol, which
2014 indicates to the C program that the POSIX <termios.h> file is
2015 to be included.
2016
2017i_time (i_time.U):
2018 This variable conditionally defines I_TIME, which indicates
2019 to the C program that it should include <time.h>.
2020
2021i_unistd (i_unistd.U):
2022 This variable conditionally defines the I_UNISTD symbol, and indicates
2023 whether a C program should include <unistd.h>.
2024
2025i_utime (i_utime.U):
2026 This variable conditionally defines the I_UTIME symbol, and indicates
2027 whether a C program should include <utime.h>.
2028
2029i_values (i_values.U):
2030 This variable conditionally defines the I_VALUES symbol, and indicates
2031 whether a C program may include <values.h> to get symbols like MAXLONG
2032 and friends.
2033
2034i_varargs (i_varhdr.U):
2035 This variable conditionally defines I_VARARGS, which indicates
2036 to the C program that it should include <varargs.h>.
2037
2038i_varhdr (i_varhdr.U):
2039 Contains the name of the header to be included to get va_dcl definition.
2040 Typically one of varargs.h or stdarg.h.
2041
2042i_vfork (i_vfork.U):
2043 This variable conditionally defines the I_VFORK symbol, and indicates
2044 whether a C program should include vfork.h.
2045
2046ignore_versioned_solibs (libs.U):
2047 This variable should be non-empty if non-versioned shared
2048 libraries (libfoo.so.x.y) are to be ignored (because they
2049 cannot be linked against).
2050
2051incpath (usrinc.U):
2052 This variable must preceed the normal include path to get hte
2053 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2054 Value can be "" or "/bsd43" on mips.
2055
2056inews (Loc.U):
2057 This variable is defined but not used by Configure.
2058 The value is a plain '' and is not useful.
2059
2060installarchlib (archlib.U):
2061 This variable is really the same as archlibexp but may differ on
2062 those systems using AFS. For extra portability, only this variable
2063 should be used in makefiles.
2064
2065installbin (bin.U):
2066 This variable is the same as binexp unless AFS is running in which case
2067 the user is explicitely prompted for it. This variable should always
2068 be used in your makefiles for maximum portability.
2069
2070installman1dir (man1dir.U):
2071 This variable is really the same as man1direxp, unless you are using
2072 AFS in which case it points to the read/write location whereas
2073 man1direxp only points to the read-only access location. For extra
2074 portability, you should only use this variable within your makefiles.
2075
2076installman3dir (man3dir.U):
2077 This variable is really the same as man3direxp, unless you are using
2078 AFS in which case it points to the read/write location whereas
2079 man3direxp only points to the read-only access location. For extra
2080 portability, you should only use this variable within your makefiles.
2081
2082installprefix (installprefix.U):
2083 This variable holds the name of the directory below which
2084 "make install" will install the package. For most users, this
2085 is the same as prefix. However, it is useful for
2086 installing the software into a different (usually temporary)
2087 location after which it can be bundled up and moved somehow
2088 to the final location specified by prefix.
2089
2090installprefixexp (installprefix.U):
2091 This variable holds the full absolute path of installprefix
2092 with all ~-expansion done.
2093
2094installprivlib (privlib.U):
2095 This variable is really the same as privlibexp but may differ on
2096 those systems using AFS. For extra portability, only this variable
2097 should be used in makefiles.
2098
2099installscript (scriptdir.U):
2100 This variable is usually the same as scriptdirexp, unless you are on
2101 a system running AFS, in which case they may differ slightly. You
2102 should always use this variable within your makefiles for portability.
2103
2104installsitearch (sitearch.U):
2105 This variable is really the same as sitearchexp but may differ on
2106 those systems using AFS. For extra portability, only this variable
2107 should be used in makefiles.
2108
2109installsitelib (sitelib.U):
2110 This variable is really the same as sitelibexp but may differ on
2111 those systems using AFS. For extra portability, only this variable
2112 should be used in makefiles.
2113
2114installstyle (installstyle.U):
2115 This variable describes the "style" of the perl installation.
2116 This is intended to be useful for tools that need to
2117 manipulate entire perl distributions. Perl itself doesn't use
2118 this to find its libraries -- the library directories are
2119 stored directly in Config.pm. Currently, there are only two
2120 styles: "lib" and "lib/perl5". The default library locations
2121 (e.g. privlib, sitelib) are either $prefix/lib or
2122 $prefix/lib/perl5. The former is useful if $prefix is a
2123 directory dedicated to perl (e.g. /opt/perl), while the latter
2124 is useful if $prefix is shared by many packages, e.g. if
2125 $prefix=/usr/local.
2126 This may later be extended to include other information, so
2127 be careful with pattern-matching on the results.
2128 For compatibility with perl5.005 and earlier, the default
2129 setting is based on whether or not $prefix contains the string
2130 "perl".
2131
2132installusrbinperl (instubperl.U):
2133 This variable tells whether Perl should be installed also as
2134 /usr/bin/perl in addition to
2135 $installbin/perl
2136
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2137installvendorlib (vendorlib.U):
2138 This variable is really the same as vendorlibexp but may differ on
2139 those systems using AFS. For extra portability, only this variable
2140 should be used in makefiles.
2141
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2142intsize (intsize.U):
2143 This variable contains the value of the INTSIZE symbol, which
2144 indicates to the C program how many bytes there are in an int.
2145
2146known_extensions (Extensions.U):
2147 This variable holds a list of all XS extensions included in
2148 the package.
2149
2150ksh (Loc.U):
2151 This variable is defined but not used by Configure.
2152 The value is a plain '' and is not useful.
2153
2154large (models.U):
2155 This variable contains a flag which will tell the C compiler and loader
2156 to produce a program running with a large memory model. It is up to
2157 the Makefile to use this.
2158
2159ld (dlsrc.U):
2160 This variable indicates the program to be used to link
2161 libraries for dynamic loading. On some systems, it is 'ld'.
2162 On ELF systems, it should be $cc. Mostly, we'll try to respect
2163 the hint file setting.
2164
2165lddlflags (dlsrc.U):
2166 This variable contains any special flags that might need to be
2167 passed to $ld to create a shared library suitable for dynamic
2168 loading. It is up to the makefile to use it. For hpux, it
2169 should be '-b'. For sunos 4.1, it is empty.
2170
2171ldflags (ccflags.U):
2172 This variable contains any additional C loader flags desired by
2173 the user. It is up to the Makefile to use this.
2174
2175ldlibpthname (libperl.U):
2176 This variable holds the name of the shared library
2177 search path, often LD_LIBRARY_PATH. To get an empty
2178 string, the hints file must set this to 'none'.
2179
2180less (Loc.U):
5bf26616 2181 This variable is used internally by Configure to determine the
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2182 full pathname (if any) of the less program. After Configure runs,
2183 the value is reset to a plain "less" and is not useful.
2184
2185lib_ext (Unix.U):
2186 This is an old synonym for _a.
2187
2188libc (libc.U):
2189 This variable contains the location of the C library.
2190
2191libperl (libperl.U):
2192 The perl executable is obtained by linking perlmain.c with
2193 libperl, any static extensions (usually just DynaLoader),
2194 and any other libraries needed on this system. libperl
2195 is usually libperl.a, but can also be libperl.so.xxx if
2196 the user wishes to build a perl executable with a shared
2197 library.
2198
2199libpth (libpth.U):
2200 This variable holds the general path (space-separated) used to find
2201 libraries. It is intended to be used by other units.
2202
2203libs (libs.U):
2204 This variable holds the additional libraries we want to use.
2205 It is up to the Makefile to deal with it.
2206
2207libswanted (Myinit.U):
2208 This variable holds a list of all the libraries we want to
2209 search. The order is chosen to pick up the c library
2210 ahead of ucb or bsd libraries for SVR4.
2211
2212line (Loc.U):
2213 This variable is defined but not used by Configure.
2214 The value is a plain '' and is not useful.
2215
2216lint (Loc.U):
2217 This variable is defined but not used by Configure.
2218 The value is a plain '' and is not useful.
2219
2220lkflags (ccflags.U):
2221 This variable contains any additional C partial linker flags desired by
2222 the user. It is up to the Makefile to use this.
2223
2224ln (Loc.U):
5bf26616 2225 This variable is used internally by Configure to determine the
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2226 full pathname (if any) of the ln program. After Configure runs,
2227 the value is reset to a plain "ln" and is not useful.
2228
2229lns (lns.U):
2230 This variable holds the name of the command to make
2231 symbolic links (if they are supported). It can be used
2232 in the Makefile. It is either 'ln -s' or 'ln'
2233
2234locincpth (ccflags.U):
2235 This variable contains a list of additional directories to be
2236 searched by the compiler. The appropriate '-I' directives will
2237 be added to ccflags. This is intended to simplify setting
2238 local directories from the Configure command line.
2239 It's not much, but it parallels the loclibpth stuff in libpth.U.
2240
2241loclibpth (libpth.U):
2242 This variable holds the paths (space-separated) used to find local
2243 libraries. It is prepended to libpth, and is intended to be easily
2244 set from the command line.
2245
2246longdblsize (d_longdbl.U):
2247 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2248 indicates to the C program how many bytes there are in a long double,
2249 if this system supports long doubles.
2250
2251longlongsize (d_longlong.U):
2252 This variable contains the value of the LONGLONGSIZE symbol, which
2253 indicates to the C program how many bytes there are in a long long,
2254 if this system supports long long.
2255
2256longsize (intsize.U):
2257 This variable contains the value of the LONGSIZE symbol, which
2258 indicates to the C program how many bytes there are in a long.
2259
2260lp (Loc.U):
2261 This variable is defined but not used by Configure.
2262 The value is a plain '' and is not useful.
2263
2264lpr (Loc.U):
2265 This variable is defined but not used by Configure.
2266 The value is a plain '' and is not useful.
2267
2268ls (Loc.U):
5bf26616 2269 This variable is used internally by Configure to determine the
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2270 full pathname (if any) of the ls program. After Configure runs,
2271 the value is reset to a plain "ls" and is not useful.
2272
2273lseeksize (lseektype.U):
2274 This variable defines lseektype to be something like off_t, long,
2275 or whatever type is used to declare lseek offset's type in the
2276 kernel (which also appears to be lseek's return type).
2277
2278lseektype (lseektype.U):
2279 This variable defines lseektype to be something like off_t, long,
2280 or whatever type is used to declare lseek offset's type in the
2281 kernel (which also appears to be lseek's return type).
2282
2283mail (Loc.U):
2284 This variable is defined but not used by Configure.
2285 The value is a plain '' and is not useful.
2286
2287mailx (Loc.U):
2288 This variable is defined but not used by Configure.
2289 The value is a plain '' and is not useful.
2290
2291make (Loc.U):
5bf26616 2292 This variable is used internally by Configure to determine the
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2293 full pathname (if any) of the make program. After Configure runs,
2294 the value is reset to a plain "make" and is not useful.
2295
2296make_set_make (make.U):
2297 Some versions of 'make' set the variable MAKE. Others do not.
2298 This variable contains the string to be included in Makefile.SH
2299 so that MAKE is set if needed, and not if not needed.
2300 Possible values are:
2301 make_set_make='#' # If your make program handles this for you,
2302 make_set_make="MAKE=$make" # if it doesn't.
2303 I used a comment character so that we can distinguish a
2304 'set' value (from a previous config.sh or Configure '-D' option)
2305 from an uncomputed value.
2306
2307mallocobj (mallocsrc.U):
2308 This variable contains the name of the malloc.o that this package
2309 generates, if that malloc.o is preferred over the system malloc.
2310 Otherwise the value is null. This variable is intended for generating
2311 Makefiles. See mallocsrc.
2312
2313mallocsrc (mallocsrc.U):
2314 This variable contains the name of the malloc.c that comes with
2315 the package, if that malloc.c is preferred over the system malloc.
2316 Otherwise the value is null. This variable is intended for generating
2317 Makefiles.
2318
2319malloctype (mallocsrc.U):
2320 This variable contains the kind of ptr returned by malloc and realloc.
2321
2322man1dir (man1dir.U):
2323 This variable contains the name of the directory in which manual
2324 source pages are to be put. It is the responsibility of the
2325 Makefile.SH to get the value of this into the proper command.
2326 You must be prepared to do the ~name expansion yourself.
2327
2328man1direxp (man1dir.U):
2329 This variable is the same as the man1dir variable, but is filename
2330 expanded at configuration time, for convenient use in makefiles.
2331
2332man1ext (man1dir.U):
2333 This variable contains the extension that the manual page should
2334 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2335 See man1dir.
2336
2337man3dir (man3dir.U):
2338 This variable contains the name of the directory in which manual
2339 source pages are to be put. It is the responsibility of the
2340 Makefile.SH to get the value of this into the proper command.
2341 You must be prepared to do the ~name expansion yourself.
2342
2343man3direxp (man3dir.U):
2344 This variable is the same as the man3dir variable, but is filename
2345 expanded at configuration time, for convenient use in makefiles.
2346
2347man3ext (man3dir.U):
2348 This variable contains the extension that the manual page should
2349 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2350 See man3dir.
2351
2352Mcc (Loc.U):
5bf26616 2353 This variable is used internally by Configure to determine the
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2354 full pathname (if any) of the Mcc program. After Configure runs,
2355 the value is reset to a plain "Mcc" and is not useful.
2356
2357medium (models.U):
2358 This variable contains a flag which will tell the C compiler and loader
2359 to produce a program running with a medium memory model. If the
2360 medium model is not supported, contains the flag to produce large
2361 model programs. It is up to the Makefile to use this.
2362
2363mips_type (usrinc.U):
2364 This variable holds the environment type for the mips system.
2365 Possible values are "BSD 4.3" and "System V".
2366
2367mkdir (Loc.U):
5bf26616 2368 This variable is used internally by Configure to determine the
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2369 full pathname (if any) of the mkdir program. After Configure runs,
2370 the value is reset to a plain "mkdir" and is not useful.
2371
2372mmaptype (d_mmap.U):
2373 This symbol contains the type of pointer returned by mmap()
2374 (and simultaneously the type of the first argument).
2375 It can be 'void *' or 'caddr_t'.
2376
2377models (models.U):
2378 This variable contains the list of memory models supported by this
2379 system. Possible component values are none, split, unsplit, small,
2380 medium, large, and huge. The component values are space separated.
2381
2382modetype (modetype.U):
2383 This variable defines modetype to be something like mode_t,
2384 int, unsigned short, or whatever type is used to declare file
2385 modes for system calls.
2386
2387more (Loc.U):
5bf26616 2388 This variable is used internally by Configure to determine the
781b178c
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2389 full pathname (if any) of the more program. After Configure runs,
2390 the value is reset to a plain "more" and is not useful.
2391
2392multiarch (multiarch.U):
2393 This variable conditionally defines the MULTIARCH symbol
2394 which signifies the presence of multiplatform files.
2395 This is normally set by hints files.
2396
2397mv (Loc.U):
2398 This variable is defined but not used by Configure.
2399 The value is a plain '' and is not useful.
2400
2401myarchname (archname.U):
2402 This variable holds the architecture name computed by Configure in
2403 a previous run. It is not intended to be perused by any user and
2404 should never be set in a hint file.
2405
2406mydomain (myhostname.U):
2407 This variable contains the eventual value of the MYDOMAIN symbol,
2408 which is the domain of the host the program is going to run on.
2409 The domain must be appended to myhostname to form a complete host name.
2410 The dot comes with mydomain, and need not be supplied by the program.
2411
2412myhostname (myhostname.U):
2413 This variable contains the eventual value of the MYHOSTNAME symbol,
2414 which is the name of the host the program is going to run on.
2415 The domain is not kept with hostname, but must be gotten from mydomain.
2416 The dot comes with mydomain, and need not be supplied by the program.
2417
2418myuname (Oldconfig.U):
2419 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2420 pseudo variables assignments in the output are stripped, thank you. The
2421 whole thing is then lower-cased.
2422
2423n (n.U):
2424 This variable contains the '-n' flag if that is what causes the echo
2425 command to suppress newline. Otherwise it is null. Correct usage is
2426 $echo $n "prompt for a question: $c".
2427
2428netdb_hlen_type (netdbtype.U):
2429 This variable holds the type used for the 2nd argument to
2430 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2431 This is only useful if you have gethostbyaddr(), naturally.
2432
2433netdb_host_type (netdbtype.U):
2434 This variable holds the type used for the 1st argument to
2435 gethostbyaddr(). Usually, this is char * or void *, possibly
2436 with or without a const prefix.
2437 This is only useful if you have gethostbyaddr(), naturally.
2438
2439netdb_name_type (netdbtype.U):
2440 This variable holds the type used for the argument to
2441 gethostbyname(). Usually, this is char * or const char *.
2442 This is only useful if you have gethostbyname(), naturally.
2443
2444netdb_net_type (netdbtype.U):
2445 This variable holds the type used for the 1st argument to
2446 getnetbyaddr(). Usually, this is int or long.
2447 This is only useful if you have getnetbyaddr(), naturally.
2448
2449nm (Loc.U):
5bf26616 2450 This variable is used internally by Configure to determine the
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2451 full pathname (if any) of the nm program. After Configure runs,
2452 the value is reset to a plain "nm" and is not useful.
2453
2454nm_opt (usenm.U):
2455 This variable holds the options that may be necessary for nm.
2456
2457nm_so_opt (usenm.U):
2458 This variable holds the options that may be necessary for nm
2459 to work on a shared library but that can not be used on an
2460 archive library. Currently, this is only used by Linux, where
2461 nm --dynamic is *required* to get symbols from an ELF library which
2462 has been stripped, but nm --dynamic is *fatal* on an archive library.
2463 Maybe Linux should just always set usenm=false.
2464
2465nonxs_ext (Extensions.U):
2466 This variable holds a list of all non-xs extensions included
2467 in the package. All of them will be built.
2468
2469nroff (Loc.U):
5bf26616 2470 This variable is used internally by Configure to determine the
781b178c
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2471 full pathname (if any) of the nroff program. After Configure runs,
2472 the value is reset to a plain "nroff" and is not useful.
2473
2474o_nonblock (nblock_io.U):
2475 This variable bears the symbol value to be used during open() or fcntl()
2476 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2477 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2478 but that is only supported by some devices.
2479
2480obj_ext (Unix.U):
2481 This is an old synonym for _o.
2482
2483old_pthread_create_joinable (d_pthrattrj.U):
2484 This variable defines the constant to use for creating joinable
2485 (aka undetached) pthreads. Unused if pthread.h defines
2486 PTHREAD_CREATE_JOINABLE. If used, possible values are
2487 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2488
2489optimize (ccflags.U):
2490 This variable contains any optimizer/debugger flag that should be used.
2491 It is up to the Makefile to use it.
2492
2493orderlib (orderlib.U):
2494 This variable is "true" if the components of libraries must be ordered
2495 (with `lorder $* | tsort`) before placing them in an archive. Set to
2496 "false" if ranlib or ar can generate random libraries.
2497
2498osname (Oldconfig.U):
2499 This variable contains the operating system name (e.g. sunos,
2500 solaris, hpux, etc.). It can be useful later on for setting
2501 defaults. Any spaces are replaced with underscores. It is set
2502 to a null string if we can't figure it out.
2503
2504osvers (Oldconfig.U):
2505 This variable contains the operating system version (e.g.
2506 4.1.3, 5.2, etc.). It is primarily used for helping select
2507 an appropriate hints file, but might be useful elsewhere for
2508 setting defaults. It is set to '' if we can't figure it out.
2509 We try to be flexible about how much of the version number
2510 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2511 same for this package, hints files might just be os_4.0 or
2512 os_4.1, etc., not keeping separate files for each little release.
2513
2514package (package.U):
2515 This variable contains the name of the package being constructed.
2516 It is primarily intended for the use of later Configure units.
2517
2518pager (pager.U):
2519 This variable contains the name of the preferred pager on the system.
2520 Usual values are (the full pathnames of) more, less, pg, or cat.
2521
2522passcat (nis.U):
2523 This variable contains a command that produces the text of the
2524 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2525 "ypcat passwd" when NIS is used.
2526
2527patchlevel (patchlevel.U):
2528 The patchlevel level of this package.
2529 The value of patchlevel comes from the patchlevel.h file.
2530
2531path_sep (Unix.U):
2532 This is an old synonym for p_ in Head.U, the character
2533 used to separate elements in the command shell search PATH.
2534
2535perl (Loc.U):
2536 This variable is defined but not used by Configure.
2537 The value is a plain '' and is not useful.
2538
2539perladmin (perladmin.U):
2540 Electronic mail address of the perl5 administrator.
2541
2542perlpath (perlpath.U):
2543 This variable contains the eventual value of the PERLPATH symbol,
2544 which contains the name of the perl interpreter to be used in
2545 shell scripts and in the "eval 'exec'" idiom.
2546
2547pg (Loc.U):
5bf26616 2548 This variable is used internally by Configure to determine the
781b178c
JH
2549 full pathname (if any) of the pg program. After Configure runs,
2550 the value is reset to a plain "pg" and is not useful.
2551
2552phostname (myhostname.U):
2553 This variable contains the eventual value of the PHOSTNAME symbol,
2554 which is a command that can be fed to popen() to get the host name.
2555 The program should probably not presume that the domain is or isn't
2556 there already.
2557
2558pidtype (pidtype.U):
2559 This variable defines PIDTYPE to be something like pid_t, int,
2560 ushort, or whatever type is used to declare process ids in the kernel.
2561
2562plibpth (libpth.U):
2563 Holds the private path used by Configure to find out the libraries.
2564 Its value is prepend to libpth. This variable takes care of special
2565 machines, like the mips. Usually, it should be empty.
2566
75347591
JH
2567pm_apiversion (xs_apiversion.U):
2568 This variable contains the version of the oldest perl
2569 compatible with the present perl. (That is, pure perl modules
2570 written for $pm_apiversion will still work for the current
2571 version). perl.c:incpush() and lib/lib.pm will automatically
2572 search in $sitelib for older directories across major versions
2573 back to pm_apiversion. This is only useful if you have a perl
2574 library directory tree structured like the default one. The
2575 versioned site_perl library was introduced in 5.005, so that's
2576 the default setting for this variable. It's hard to imagine
2577 it changing before Perl6. It is included here for symmetry
2578 with xs_apiveprsion -- the searching algorithms will
2579 (presumably) be similar.
2580 See the INSTALL file for how this works.
2581
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2582pmake (Loc.U):
2583 This variable is defined but not used by Configure.
2584 The value is a plain '' and is not useful.
2585
2586pr (Loc.U):
2587 This variable is defined but not used by Configure.
2588 The value is a plain '' and is not useful.
2589
2590prefix (prefix.U):
2591 This variable holds the name of the directory below which the
2592 user will install the package. Usually, this is /usr/local, and
2593 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2594 man pages in /usr/local/man, etc. It is only used to set defaults
2595 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2596
2597prefixexp (prefix.U):
2598 This variable holds the full absolute path of the directory below
2599 which the user will install the package. Derived from prefix.
2600
2601privlib (privlib.U):
2602 This variable contains the eventual value of the PRIVLIB symbol,
2603 which is the name of the private library for this package. It may
2604 have a ~ on the front. It is up to the makefile to eventually create
2605 this directory while performing installation (with ~ substitution).
2606
2607privlibexp (privlib.U):
2608 This variable is the ~name expanded version of privlib, so that you
2609 may use it directly in Makefiles or shell scripts.
2610
2611prototype (prototype.U):
2612 This variable holds the eventual value of CAN_PROTOTYPE, which
2613 indicates the C compiler can handle funciton prototypes.
2614
2615ptrsize (ptrsize.U):
2616 This variable contains the value of the PTRSIZE symbol, which
2617 indicates to the C program how many bytes there are in a pointer.
2618
2619randbits (randfunc.U):
2620 Indicates how many bits are produced by the function used to
2621 generate normalized random numbers.
2622
2623randfunc (randfunc.U):
2624 Indicates the name of the random number function to use.
2625 Values include drand48, random, and rand. In C programs,
2626 the 'Drand01' macro is defined to generate uniformly distributed
2627 random numbers over the range [0., 1.[ (see drand01 and nrand).
2628
2629randseedtype (randfunc.U):
2630 Indicates the type of the argument of the seedfunc.
2631
2632ranlib (orderlib.U):
2633 This variable is set to the pathname of the ranlib program, if it is
2634 needed to generate random libraries. Set to ":" if ar can generate
2635 random libraries or if random libraries are not supported
2636
2637rd_nodata (nblock_io.U):
2638 This variable holds the return code from read() when no data is
2639 present. It should be -1, but some systems return 0 when O_NDELAY is
2640 used, which is a shame because you cannot make the difference between
2641 no data and an EOF.. Sigh!
2642
2643rm (Loc.U):
5bf26616 2644 This variable is used internally by Configure to determine the
781b178c
JH
2645 full pathname (if any) of the rm program. After Configure runs,
2646 the value is reset to a plain "rm" and is not useful.
2647
2648rmail (Loc.U):
2649 This variable is defined but not used by Configure.
2650 The value is a plain '' and is not useful.
2651
2652runnm (usenm.U):
2653 This variable contains 'true' or 'false' depending whether the
2654 nm extraction should be performed or not, according to the value
2655 of usenm and the flags on the Configure command line.
2656
2657sched_yield (d_pthread_y.U):
2658 This variable defines the way to yield the execution
2659 of the current thread.
2660
2661scriptdir (scriptdir.U):
2662 This variable holds the name of the directory in which the user wants
2663 to put publicly scripts for the package in question. It is either
2664 the same directory as for binaries, or a special one that can be
2665 mounted across different architectures, like /usr/share. Programs
2666 must be prepared to deal with ~name expansion.
2667
2668scriptdirexp (scriptdir.U):
2669 This variable is the same as scriptdir, but is filename expanded
2670 at configuration time, for programs not wanting to bother with it.
2671
2672sed (Loc.U):
5bf26616 2673 This variable is used internally by Configure to determine the
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JH
2674 full pathname (if any) of the sed program. After Configure runs,
2675 the value is reset to a plain "sed" and is not useful.
2676
2677seedfunc (randfunc.U):
2678 Indicates the random number generating seed function.
2679 Values include srand48, srandom, and srand.
2680
2681selectminbits (selectminbits.U):
2682 This variable holds the minimum number of bits operated by select.
2683 That is, if you do select(n, ...), how many bits at least will be
2684 cleared in the masks if some activity is detected. Usually this
2685 is either n or 32*ceil(n/32), especially many little-endians do
2686 the latter. This is only useful if you have select(), naturally.
2687
2688selecttype (selecttype.U):
2689 This variable holds the type used for the 2nd, 3rd, and 4th
2690 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2691 is defined, and 'int *' otherwise. This is only useful if you
2692 have select(), naturally.
2693
2694sendmail (Loc.U):
2695 This variable is defined but not used by Configure.
2696 The value is a plain '' and is not useful.
2697
2698sh (sh.U):
2699 This variable contains the full pathname of the shell used
2700 on this system to execute Bourne shell scripts. Usually, this will be
2701 /bin/sh, though it's possible that some systems will have /bin/ksh,
2702 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2703 D:/bin/sh.exe.
2704 This unit comes before Options.U, so you can't set sh with a '-D'
2705 option, though you can override this (and startsh)
2706 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2707
2708shar (Loc.U):
2709 This variable is defined but not used by Configure.
2710 The value is a plain '' and is not useful.
2711
2712sharpbang (spitshell.U):
2713 This variable contains the string #! if this system supports that
2714 construct.
2715
2716shmattype (d_shmat.U):
2717 This symbol contains the type of pointer returned by shmat().
2718 It can be 'void *' or 'char *'.
2719
2720shortsize (intsize.U):
2721 This variable contains the value of the SHORTSIZE symbol which
2722 indicates to the C program how many bytes there are in a short.
2723
2724shrpenv (libperl.U):
2725 If the user builds a shared libperl.so, then we need to tell the
2726 'perl' executable where it will be able to find the installed libperl.so.
2727 One way to do this on some systems is to set the environment variable
2728 LD_RUN_PATH to the directory that will be the final location of the
2729 shared libperl.so. The makefile can use this with something like
2730 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2731 Typical values are
2732 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2733 or
2734 shrpenv=''
2735 See the main perl Makefile.SH for actual working usage.
2736 Alternatively, we might be able to use a command line option such
2737 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2738 $archlibexp/CORE (Linux).
2739
2740shsharp (spitshell.U):
2741 This variable tells further Configure units whether your sh can
2742 handle # comments.
2743
2744sig_count (sig_name.U):
2745 This variable holds a number larger than the largest valid
2746 signal number. This is usually the same as the NSIG macro.
2747
2748sig_name (sig_name.U):
2749 This variable holds the signal names, space separated. The leading
2750 SIG in signal name is removed. A ZERO is prepended to the
2751 list. This is currently not used.
2752
2753sig_name_init (sig_name.U):
2754 This variable holds the signal names, enclosed in double quotes and
2755 separated by commas, suitable for use in the SIG_NAME definition
2756 below. A "ZERO" is prepended to the list, and the list is
2757 terminated with a plain 0. The leading SIG in signal names
2758 is removed. See sig_num.
2759
2760sig_num (sig_name.U):
2761 This variable holds the signal numbers, space separated. A ZERO is
2762 prepended to the list (corresponding to the fake SIGZERO), and
2763 the list is terminated with a 0. Those numbers correspond to
2764 the value of the signal listed in the same place within the
2765 sig_name list.
2766
2767sig_num_init (sig_name.U):
2768 This variable holds the signal numbers, enclosed in double quotes and
2769 separated by commas, suitable for use in the SIG_NUM definition
2770 below. A "ZERO" is prepended to the list, and the list is
2771 terminated with a plain 0.
2772
2773signal_t (d_voidsig.U):
2774 This variable holds the type of the signal handler (void or int).
2775
2776sitearch (sitearch.U):
2777 This variable contains the eventual value of the SITEARCH symbol,
2778 which is the name of the private library for this package. It may
2779 have a ~ on the front. It is up to the makefile to eventually create
2780 this directory while performing installation (with ~ substitution).
2781
2782sitearchexp (sitearch.U):
2783 This variable is the ~name expanded version of sitearch, so that you
2784 may use it directly in Makefiles or shell scripts.
2785
2786sitelib (sitelib.U):
2787 This variable contains the eventual value of the SITELIB symbol,
2788 which is the name of the private library for this package. It may
2789 have a ~ on the front. It is up to the makefile to eventually create
2790 this directory while performing installation (with ~ substitution).
2791
2792sitelibexp (sitelib.U):
2793 This variable is the ~name expanded version of sitelib, so that you
2794 may use it directly in Makefiles or shell scripts.
2795
2796siteprefix (siteprefix.U):
2797 This variable holds the full absolute path of the directory below
2798 which the user will install add-on packages.
2799
2800siteprefixexp (siteprefix.U):
2801 This variable holds the full absolute path of the directory below
2802 which the user will install add-on packages. Derived from siteprefix.
2803
2804sizetype (sizetype.U):
2805 This variable defines sizetype to be something like size_t,
2806 unsigned long, or whatever type is used to declare length
2807 parameters for string functions.
2808
2809sleep (Loc.U):
2810 This variable is defined but not used by Configure.
2811 The value is a plain '' and is not useful.
2812
2813smail (Loc.U):
2814 This variable is defined but not used by Configure.
2815 The value is a plain '' and is not useful.
2816
2817small (models.U):
2818 This variable contains a flag which will tell the C compiler and loader
2819 to produce a program running with a small memory model. It is up to
2820 the Makefile to use this.
2821
2822so (so.U):
2823 This variable holds the extension used to identify shared libraries
2824 (also known as shared objects) on the system. Usually set to 'so'.
2825
2826sockethdr (d_socket.U):
2827 This variable has any cpp '-I' flags needed for socket support.
2828
2829socketlib (d_socket.U):
2830 This variable has the names of any libraries needed for socket support.
2831
2832sort (Loc.U):
5bf26616 2833 This variable is used internally by Configure to determine the
781b178c
JH
2834 full pathname (if any) of the sort program. After Configure runs,
2835 the value is reset to a plain "sort" and is not useful.
2836
2837spackage (package.U):
2838 This variable contains the name of the package being constructed,
2839 with the first letter uppercased, i.e. suitable for starting
2840 sentences.
2841
2842spitshell (spitshell.U):
2843 This variable contains the command necessary to spit out a runnable
2844 shell on this system. It is either cat or a grep '-v' for # comments.
2845
2846split (models.U):
2847 This variable contains a flag which will tell the C compiler and loader
2848 to produce a program that will run in separate I and D space, for those
2849 machines that support separation of instruction and data space. It is
2850 up to the Makefile to use this.
2851
11dc3f68
JH
2852sPRId64 (quadfio.U):
2853 This variable, if defined, contains the string used by stdio to
2854 format 64-bit decimal numbers (format 'd') for output.
2855
2856sPRIeldbl (longdblfio.U):
2857 This variable, if defined, contains the string used by stdio to
2858 format long doubles (format 'e') for output.
2859
2860sPRIEldbl (longdblfio.U):
2861 This variable, if defined, contains the string used by stdio to
2862 format long doubles (format 'E') for output.
2863
2864sPRIfldbl (longdblfio.U):
2865 This variable, if defined, contains the string used by stdio to
2866 format long doubles (format 'f') for output.
2867
2868sPRIFldbl (longdblfio.U):
2869 This variable, if defined, contains the string used by stdio to
2870 format long doubles (format 'F') for output.
2871
2872sPRIgldbl (longdblfio.U):
2873 This variable, if defined, contains the string used by stdio to
2874 format long doubles (format 'g') for output.
2875
2876sPRIGldbl (longdblfio.U):
2877 This variable, if defined, contains the string used by stdio to
2878 format long doubles (format 'G') for output.
2879
2880sPRIi64 (quadfio.U):
2881 This variable, if defined, contains the string used by stdio to
2882 format 64-bit decimal numbers (format 'i') for output.
2883
2884sPRIo64 (quadfio.U):
2885 This variable, if defined, contains the string used by stdio to
2886 format 64-bit octal numbers (format 'o') for output.
2887
2888sPRIu64 (quadfio.U):
2889 This variable, if defined, contains the string used by stdio to
2890 format 64-bit unsigned decimal numbers (format 'u') for output.
2891
2892sPRIx64 (quadfio.U):
2893 This variable, if defined, contains the string used by stdio to
2894 format 64-bit hexadecimal numbers (format 'x') for output.
2895
2896sPRIX64 (quadfio.U):
2897 This variable, if defined, contains the string used by stdio to
2898 format 64-bit hExADECimAl numbers (format 'X') for output.
2899
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JH
2900src (src.U):
2901 This variable holds the path to the package source. It is up to
2902 the Makefile to use this variable and set VPATH accordingly to
2903 find the sources remotely.
2904
2905ssizetype (ssizetype.U):
2906 This variable defines ssizetype to be something like ssize_t,
2907 long or int. It is used by functions that return a count
2908 of bytes or an error condition. It must be a signed type.
2909 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2910
2911startperl (startperl.U):
2912 This variable contains the string to put on the front of a perl
2913 script to make sure (hopefully) that it runs with perl and not some
2914 shell. Of course, that leading line must be followed by the classical
2915 perl idiom:
2916 eval 'exec perl -S $0 ${1+"$@"}'
2917 if $running_under_some_shell;
2918 to guarantee perl startup should the shell execute the script. Note
2919 that this magic incatation is not understood by csh.
2920
2921startsh (startsh.U):
2922 This variable contains the string to put on the front of a shell
2923 script to make sure (hopefully) that it runs with sh and not some
2924 other shell.
2925
2926static_ext (Extensions.U):
2927 This variable holds a list of XS extension files we want to
2928 link statically into the package. It is used by Makefile.
2929
2930stdchar (stdchar.U):
2931 This variable conditionally defines STDCHAR to be the type of char
2932 used in stdio.h. It has the values "unsigned char" or "char".
2933
2934stdio_base (d_stdstdio.U):
2935 This variable defines how, given a FILE pointer, fp, to access the
2936 _base field (or equivalent) of stdio.h's FILE structure. This will
2937 be used to define the macro FILE_base(fp).
2938
2939stdio_bufsiz (d_stdstdio.U):
2940 This variable defines how, given a FILE pointer, fp, to determine
2941 the number of bytes store in the I/O buffer pointer to by the
2942 _base field (or equivalent) of stdio.h's FILE structure. This will
2943 be used to define the macro FILE_bufsiz(fp).
2944
2945stdio_cnt (d_stdstdio.U):
2946 This variable defines how, given a FILE pointer, fp, to access the
2947 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2948 be used to define the macro FILE_cnt(fp).
2949
2950stdio_filbuf (d_stdstdio.U):
2951 This variable defines how, given a FILE pointer, fp, to tell
2952 stdio to refill it's internal buffers (?). This will
2953 be used to define the macro FILE_filbuf(fp).
2954
2955stdio_ptr (d_stdstdio.U):
2956 This variable defines how, given a FILE pointer, fp, to access the
2957 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2958 be used to define the macro FILE_ptr(fp).
2959
2960stdio_stream_array (stdio_streams.U):
2961 This variable tells the name of the array holding the stdio streams.
2962 Usual values include _iob, __iob, and __sF.
2963
2964strings (i_string.U):
2965 This variable holds the full path of the string header that will be
2966 used. Typically /usr/include/string.h or /usr/include/strings.h.
2967
2968submit (Loc.U):
2969 This variable is defined but not used by Configure.
2970 The value is a plain '' and is not useful.
2971
2972subversion (patchlevel.U):
2973 The subversion level of this package.
2974 The value of subversion comes from the patchlevel.h file.
2975 This is unique to perl.
2976
2977sysman (sysman.U):
2978 This variable holds the place where the manual is located on this
2979 system. It is not the place where the user wants to put his manual
2980 pages. Rather it is the place where Configure may look to find manual
2981 for unix commands (section 1 of the manual usually). See mansrc.
2982
2983tail (Loc.U):
2984 This variable is defined but not used by Configure.
2985 The value is a plain '' and is not useful.
2986
2987tar (Loc.U):
2988 This variable is defined but not used by Configure.
2989 The value is a plain '' and is not useful.
2990
2991tbl (Loc.U):
2992 This variable is defined but not used by Configure.
2993 The value is a plain '' and is not useful.
2994
2995tee (Loc.U):
2996 This variable is defined but not used by Configure.
2997 The value is a plain '' and is not useful.
2998
2999test (Loc.U):
5bf26616 3000 This variable is used internally by Configure to determine the
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3001 full pathname (if any) of the test program. After Configure runs,
3002 the value is reset to a plain "test" and is not useful.
3003
3004timeincl (i_time.U):
3005 This variable holds the full path of the included time header(s).
3006
3007timetype (d_time.U):
3008 This variable holds the type returned by time(). It can be long,
3009 or time_t on BSD sites (in which case <sys/types.h> should be
3010 included). Anyway, the type Time_t should be used.
3011
3012touch (Loc.U):
5bf26616 3013 This variable is used internally by Configure to determine the
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3014 full pathname (if any) of the touch program. After Configure runs,
3015 the value is reset to a plain "touch" and is not useful.
3016
3017tr (Loc.U):
5bf26616 3018 This variable is used internally by Configure to determine the
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3019 full pathname (if any) of the tr program. After Configure runs,
3020 the value is reset to a plain "tr" and is not useful.
3021
3022trnl (trnl.U):
3023 This variable contains the value to be passed to the tr(1)
3024 command to transliterate a newline. Typical values are
3025 '\012' and '\n'. This is needed for EBCDIC systems where
3026 newline is not necessarily '\012'.
3027
3028troff (Loc.U):
3029 This variable is defined but not used by Configure.
3030 The value is a plain '' and is not useful.
3031
2d228ff3
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3032uidsign (uidsign.U):
3033 This variable contains the signedness of a uidtype.
3034 1 for unsigned, -1 for signed.
3035
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3036uidtype (uidtype.U):
3037 This variable defines Uid_t to be something like uid_t, int,
3038 ushort, or whatever type is used to declare user ids in the kernel.
3039
3040uname (Loc.U):
5bf26616 3041 This variable is used internally by Configure to determine the
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3042 full pathname (if any) of the uname program. After Configure runs,
3043 the value is reset to a plain "uname" and is not useful.
3044
3045uniq (Loc.U):
5bf26616 3046 This variable is used internally by Configure to determine the
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3047 full pathname (if any) of the uniq program. After Configure runs,
3048 the value is reset to a plain "uniq" and is not useful.
3049
3050use64bits (use64bits.U):
3051 This variable conditionally defines the USE_64_BITS symbol,
3052 and indicates that explicit 64-bit interfaces should be used
3053 when available.
3054
3055usedl (dlsrc.U):
3056 This variable indicates if the the system supports dynamic
3057 loading of some sort. See also dlsrc and dlobj.
3058
5bf26616 3059uselargefiles (uselfs.U):
1baac590
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3060 This variable conditionally defines the USE_LARGE_FILES symbol,
3061 and indicates that large file interfaces should be used when
3062 available. The use64bits symbol will also be turned on if necessary.
3063
ca24dfc6
LV
3064uselongdouble (uselongdbl.U):
3065 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3066 and indicates that long doubles should be used when available.
3067
1baac590
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3068usemorebits (usemorebits.U):
3069 This variable conditionally defines the USE_MORE_BITS symbol,
3070 and indicates that explicit 64-bit interfaces and long doubles
3071 should be used when available.
3072
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3073usemultiplicity (usemultiplicity.U):
3074 This variable conditionally defines the MULTIPLICITY symbol,
3075 and indicates that Perl should be built to use multiplicity.
3076
3077usemymalloc (mallocsrc.U):
3078 This variable contains y if the malloc that comes with this package
3079 is desired over the system's version of malloc. People often include
3080 special versions of malloc for effiency, but such versions are often
3081 less portable. See also mallocsrc and mallocobj.
3082 If this is 'y', then -lmalloc is removed from $libs.
3083
3084usenm (usenm.U):
3085 This variable contains 'true' or 'false' depending whether the
3086 nm extraction is wanted or not.
3087
3088useopcode (Extensions.U):
3089 This variable holds either 'true' or 'false' to indicate
3090 whether the Opcode extension should be used. The sole
3091 use for this currently is to allow an easy mechanism
3092 for users to skip the Opcode extension from the Configure
3093 command line.
3094
3095useperlio (useperlio.U):
3096 This variable conditionally defines the USE_PERLIO symbol,
3097 and indicates that the PerlIO abstraction should be
3098 used throughout.
3099
3100useposix (Extensions.U):
3101 This variable holds either 'true' or 'false' to indicate
3102 whether the POSIX extension should be used. The sole
3103 use for this currently is to allow an easy mechanism
3104 for hints files to indicate that POSIX will not compile
3105 on a particular system.
3106
3107usesfio (d_sfio.U):
3108 This variable is set to true when the user agrees to use sfio.
3109 It is set to false when sfio is not available or when the user
3110 explicitely requests not to use sfio. It is here primarily so
3111 that command-line settings can override the auto-detection of
3112 d_sfio without running into a "WHOA THERE".
3113
3114useshrplib (libperl.U):
3115 This variable is set to 'yes' if the user wishes
3116 to build a shared libperl, and 'no' otherwise.
3117
3118usesocks (usesocks.U):
3119 This variable conditionally defines the USE_SOCKS symbol,
3120 and indicates that Perl should be built to use SOCKS.
3121
3122usethreads (usethreads.U):
3123 This variable conditionally defines the USE_THREADS symbol,
3124 and indicates that Perl should be built to use threads.
3125
9f50e519
NA
3126usevendorprefix (vendorprefix.U):
3127 This variable tells whether the vendorprefix
3128 and consequently other vendor* paths are in use.
3129
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3130usevfork (d_vfork.U):
3131 This variable is set to true when the user accepts to use vfork.
3132 It is set to false when no vfork is available or when the user
3133 explicitely requests not to use vfork.
3134
3135usrinc (usrinc.U):
3136 This variable holds the path of the include files, which is
3137 usually /usr/include. It is mainly used by other Configure units.
3138
3139uuname (Loc.U):
3140 This variable is defined but not used by Configure.
3141 The value is a plain '' and is not useful.
3142
a3635516
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3143vendorlib (vendorlib.U):
3144 This variable contains the eventual value of the VENDORLIB symbol,
3145 which is the name of the private library for this package. It may
3146 have a ~ on the front. It is up to the makefile to eventually create
3147 this directory while performing installation (with ~ substitution).
3148 Vendors who distribute perl binaries may place their own
3149 extensions and modules in this directory.
3150
3151vendorlibexp (vendorlib.U):
3152 This variable is the ~name expanded version of vendorlib, so that you
3153 may use it directly in Makefiles or shell scripts.
3154
3155vendorprefix (vendorprefix.U):
3156 This variable holds the full absolute path of the directory below
3157 which the vendor will install add-on packages.
3158
3159vendorprefixexp (vendorprefix.U):
3160 This variable holds the full absolute path of the directory below
3161 which the vendor will install add-on packages. Derived from vendorprefix.
3162
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3163version (patchlevel.U):
3164 The full version number of this package. This combines
3165 baserev, patchlevel, and subversion to get the full
3166 version number, including any possible subversions. Care
3167 is taken to use the C locale in order to get something
3168 like 5.004 instead of 5,004. This is unique to perl.
3169
3170vi (Loc.U):
3171 This variable is defined but not used by Configure.
3172 The value is a plain '' and is not useful.
3173
3174voidflags (voidflags.U):
3175 This variable contains the eventual value of the VOIDFLAGS symbol,
3176 which indicates how much support of the void type is given by this
3177 compiler. See VOIDFLAGS for more info.
3178
3179xlibpth (libpth.U):
3180 This variable holds extra path (space-separated) used to find
3181 libraries on this platform, for example CPU-specific libraries
3182 (on multi-CPU platforms) may be listed here.
3183
75347591
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3184xs_apiversion (xs_apiversion.U):
3185 This variable contains the version of the oldest perl binary
3186 compatible with the present perl. perl.c:incpush() and
3187 lib/lib.pm will automatically search in $sitearch for older
3188 directories across major versions back to xs_apiversion.
3189 This is only useful if you have a perl library directory tree
3190 structured like the default one.
3191 See INSTALL for how this works.
3192 The versioned site_perl directory was introduced in 5.005,
3193 so that is the lowest possible value.
3194 Since this can depend on compile time options (such as
3195 bincompat) it is set by Configure. Other non-default sources
3196 of potential incompatibility, such as multiplicity, threads,
3197 debugging, 64bits, sfio, etc., are not checked for currently,
3198 though in principle we could go snooping around in old
3199 Config.pm files.
3200
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3201zcat (Loc.U):
3202 This variable is defined but not used by Configure.
3203 The value is a plain '' and is not useful.
3204
3205zip (Loc.U):
5bf26616 3206 This variable is used internally by Configure to determine the
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3207 full pathname (if any) of the zip program. After Configure runs,
3208 the value is reset to a plain "zip" and is not useful.
3209