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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_statblks (d_statblks.U):
1318 This variable conditionally defines USE_STAT_BLOCKS
1319 if this system has a stat structure declaring
1320 st_blksize and st_blocks.
1321
1322d_statfs (d_statfs.U):
1323 This variable conditionally defines the HAS_STATFS symbol, which
1324 indicates to the C program that the statfs() routine is available.
1325
1326d_statfsflags (d_statfs.U):
1327 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1328 symbol, which indicates to struct statfs from has f_flags member.
1329 This kind of struct statfs is coming from sys/mount.h (BSD),
1330 not from sys/statfs.h (SYSV).
1331
1332d_statvfs (d_statvfs.U):
1333 This variable conditionally defines the HAS_STATVFS symbol, which
1334 indicates to the C program that the statvfs() routine is available.
1335
1336d_stdio_cnt_lval (d_stdstdio.U):
1337 This variable conditionally defines STDIO_CNT_LVALUE if the
1338 FILE_cnt macro can be used as an lvalue.
1339
1340d_stdio_ptr_lval (d_stdstdio.U):
1341 This variable conditionally defines STDIO_PTR_LVALUE if the
1342 FILE_ptr macro can be used as an lvalue.
1343
1344d_stdio_stream_array (stdio_streams.U):
1345 This variable tells whether there is an array holding
1346 the stdio streams.
1347
1348d_stdiobase (d_stdstdio.U):
1349 This variable conditionally defines USE_STDIO_BASE if this system
1350 has a FILE structure declaring a usable _base field (or equivalent)
1351 in stdio.h.
1352
1353d_stdstdio (d_stdstdio.U):
1354 This variable conditionally defines USE_STDIO_PTR if this system
1355 has a FILE structure declaring usable _ptr and _cnt fields (or
1356 equivalent) in stdio.h.
1357
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1358d_strchr (d_strchr.U):
1359 This variable conditionally defines HAS_STRCHR if strchr() and
1360 strrchr() are available for string searching.
1361
1362d_strcoll (d_strcoll.U):
1363 This variable conditionally defines HAS_STRCOLL if strcoll() is
1364 available to compare strings using collating information.
1365
1366d_strctcpy (d_strctcpy.U):
1367 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1368 indicates to the C program that this C compiler knows how to copy
1369 structures.
1370
1371d_strerrm (d_strerror.U):
1372 This variable holds what Strerrr is defined as to translate an error
1373 code condition into an error message string. It could be 'strerror'
1374 or a more complex macro emulating strrror with sys_errlist[], or the
1375 "unknown" string when both strerror and sys_errlist are missing.
1376
1377d_strerror (d_strerror.U):
1378 This variable conditionally defines HAS_STRERROR if strerror() is
1379 available to translate error numbers to strings.
1380
1381d_strtod (d_strtod.U):
1382 This variable conditionally defines the HAS_STRTOD symbol, which
1383 indicates to the C program that the strtod() routine is available
1384 to provide better numeric string conversion than atof().
1385
1386d_strtol (d_strtol.U):
1387 This variable conditionally defines the HAS_STRTOL symbol, which
1388 indicates to the C program that the strtol() routine is available
1389 to provide better numeric string conversion than atoi() and friends.
1390
1391d_strtoul (d_strtoul.U):
1392 This variable conditionally defines the HAS_STRTOUL symbol, which
1393 indicates to the C program that the strtoul() routine is available
1394 to provide conversion of strings to unsigned long.
1395
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1396d_strtoull (strtoull.U):
1397 This variable conditionally defines the HAS_STRTOULL symbol, which
1398 indicates to the C program that the strtoull() routine is available.
1399
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1400d_strxfrm (d_strxfrm.U):
1401 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1402 available to transform strings.
1403
1404d_suidsafe (d_dosuid.U):
1405 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1406 if setuid scripts can be secure. This test looks in /dev/fd/.
1407
1408d_symlink (d_symlink.U):
1409 This variable conditionally defines the HAS_SYMLINK symbol, which
1410 indicates to the C program that the symlink() routine is available
1411 to create symbolic links.
1412
1413d_syscall (d_syscall.U):
1414 This variable conditionally defines HAS_SYSCALL if syscall() is
1415 available call arbitrary system calls.
1416
1417d_sysconf (d_sysconf.U):
1418 This variable conditionally defines the HAS_SYSCONF symbol, which
1419 indicates to the C program that the sysconf() routine is available
1420 to determine system related limits and options.
1421
1422d_sysernlst (d_strerror.U):
1423 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1424 is available to translate error numbers to the symbolic name.
1425
1426d_syserrlst (d_strerror.U):
1427 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1428 available to translate error numbers to strings.
1429
1430d_system (d_system.U):
1431 This variable conditionally defines HAS_SYSTEM if system() is
1432 available to issue a shell command.
1433
1434d_tcgetpgrp (d_tcgtpgrp.U):
1435 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1436 indicates to the C program that the tcgetpgrp() routine is available.
1437 to get foreground process group ID.
1438
1439d_tcsetpgrp (d_tcstpgrp.U):
1440 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1441 indicates to the C program that the tcsetpgrp() routine is available
1442 to set foreground process group ID.
1443
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1444d_telldir (d_readdir.U):
1445 This variable conditionally defines HAS_TELLDIR if telldir() is
1446 available.
1447
1448d_telldirproto (d_telldirproto.U):
1449 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1450 which indicates to the C program that the system provides
1451 a prototype for the telldir() function. Otherwise, it is
1452 up to the program to supply one.
1453
1454d_time (d_time.U):
1455 This variable conditionally defines the HAS_TIME symbol, which indicates
1456 that the time() routine exists. The time() routine is normaly
1457 provided on UNIX systems.
1458
1459d_times (d_times.U):
1460 This variable conditionally defines the HAS_TIMES symbol, which indicates
1461 that the times() routine exists. The times() routine is normaly
1462 provided on UNIX systems. You may have to include <sys/times.h>.
1463
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1464d_truncate (d_truncate.U):
1465 This variable conditionally defines HAS_TRUNCATE if truncate() is
1466 available to truncate files.
1467
1468d_tzname (d_tzname.U):
1469 This variable conditionally defines HAS_TZNAME if tzname[] is
1470 available to access timezone names.
1471
1472d_umask (d_umask.U):
1473 This variable conditionally defines the HAS_UMASK symbol, which
1474 indicates to the C program that the umask() routine is available.
1475 to set and get the value of the file creation mask.
1476
1477d_uname (d_gethname.U):
1478 This variable conditionally defines the HAS_UNAME symbol, which
1479 indicates to the C program that the uname() routine may be
1480 used to derive the host name.
1481
1482d_union_semun (d_union_semun.U):
1483 This variable conditionally defines HAS_UNION_SEMUN if the
1484 union semun is defined by including <sys/sem.h>.
1485
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1486d_vendorlib (vendorlib.U):
1487 This variable conditionally defines PERL_VENDORLIB.
1488
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1489d_vfork (d_vfork.U):
1490 This variable conditionally defines the HAS_VFORK symbol, which
1491 indicates the vfork() routine is available.
1492
1493d_void_closedir (d_closedir.U):
1494 This variable conditionally defines VOID_CLOSEDIR if closedir()
1495 does not return a value.
1496
1497d_voidsig (d_voidsig.U):
1498 This variable conditionally defines VOIDSIG if this system
1499 declares "void (*signal(...))()" in signal.h. The old way was to
1500 declare it as "int (*signal(...))()".
1501
1502d_voidtty (i_sysioctl.U):
1503 This variable conditionally defines USE_IOCNOTTY to indicate that the
1504 ioctl() call with TIOCNOTTY should be used to void tty association.
1505 Otherwise (on USG probably), it is enough to close the standard file
1506 decriptors and do a setpgrp().
1507
1508d_volatile (d_volatile.U):
1509 This variable conditionally defines the HASVOLATILE symbol, which
1510 indicates to the C program that this C compiler knows about the
1511 volatile declaration.
1512
1513d_vprintf (d_vprintf.U):
1514 This variable conditionally defines the HAS_VPRINTF symbol, which
1515 indicates to the C program that the vprintf() routine is available
1516 to printf with a pointer to an argument list.
1517
1518d_wait4 (d_wait4.U):
1519 This variable conditionally defines the HAS_WAIT4 symbol, which
1520 indicates the wait4() routine is available.
1521
1522d_waitpid (d_waitpid.U):
1523 This variable conditionally defines HAS_WAITPID if waitpid() is
1524 available to wait for child process.
1525
1526d_wcstombs (d_wcstombs.U):
1527 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1528 indicates to the C program that the wcstombs() routine is available
1529 to convert wide character strings to multibyte strings.
1530
1531d_wctomb (d_wctomb.U):
1532 This variable conditionally defines the HAS_WCTOMB symbol, which
1533 indicates to the C program that the wctomb() routine is available
1534 to convert a wide character to a multibyte.
1535
1536d_writev (d_writev.U):
1537 This variable conditionally defines the HAS_WRITEV symbol, which
1538 indicates to the C program that the writev() routine is available.
1539
1540d_xenix (Guess.U):
1541 This variable conditionally defines the symbol XENIX, which alerts
1542 the C program that it runs under Xenix.
1543
1544date (Loc.U):
5bf26616 1545 This variable is used internally by Configure to determine the
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1546 full pathname (if any) of the date program. After Configure runs,
1547 the value is reset to a plain "date" and is not useful.
1548
1549db_hashtype (i_db.U):
1550 This variable contains the type of the hash structure element
1551 in the <db.h> header file. In older versions of DB, it was
1552 int, while in newer ones it is u_int32_t.
1553
1554db_prefixtype (i_db.U):
1555 This variable contains the type of the prefix structure element
1556 in the <db.h> header file. In older versions of DB, it was
1557 int, while in newer ones it is size_t.
1558
1559defvoidused (voidflags.U):
1560 This variable contains the default value of the VOIDUSED symbol (15).
1561
1562direntrytype (i_dirent.U):
1563 This symbol is set to 'struct direct' or 'struct dirent' depending on
1564 whether dirent is available or not. You should use this pseudo type to
1565 portably declare your directory entries.
1566
1567dlext (dlext.U):
1568 This variable contains the extension that is to be used for the
1569 dynamically loaded modules that perl generaties.
1570
1571dlsrc (dlsrc.U):
1572 This variable contains the name of the dynamic loading file that
1573 will be used with the package.
1574
1575doublesize (doublesize.U):
1576 This variable contains the value of the DOUBLESIZE symbol, which
1577 indicates to the C program how many bytes there are in a double.
1578
1579drand01 (randfunc.U):
1580 Indicates the macro to be used to generate normalized
1581 random numbers. Uses randfunc, often divided by
1582 (double) (((unsigned long) 1 << randbits)) in order to
1583 normalize the result.
1584 In C programs, the macro 'Drand01' is mapped to drand01.
1585
1586dynamic_ext (Extensions.U):
1587 This variable holds a list of XS extension files we want to
1588 link dynamically into the package. It is used by Makefile.
1589
1590eagain (nblock_io.U):
1591 This variable bears the symbolic errno code set by read() when no
1592 data is present on the file and non-blocking I/O was enabled (otherwise,
1593 read() blocks naturally).
1594
1595ebcdic (ebcdic.U):
1596 This variable conditionally defines EBCDIC if this
1597 system uses EBCDIC encoding. Among other things, this
1598 means that the character ranges are not contiguous.
1599 See trnl.U
1600
1601echo (Loc.U):
5bf26616 1602 This variable is used internally by Configure to determine the
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1603 full pathname (if any) of the echo program. After Configure runs,
1604 the value is reset to a plain "echo" and is not useful.
1605
1606egrep (Loc.U):
5bf26616 1607 This variable is used internally by Configure to determine the
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1608 full pathname (if any) of the egrep program. After Configure runs,
1609 the value is reset to a plain "egrep" and is not useful.
1610
1611emacs (Loc.U):
1612 This variable is defined but not used by Configure.
1613 The value is a plain '' and is not useful.
1614
1615eunicefix (Init.U):
1616 When running under Eunice this variable contains a command which will
1617 convert a shell script to the proper form of text file for it to be
1618 executable by the shell. On other systems it is a no-op.
1619
1620exe_ext (Unix.U):
1621 This is an old synonym for _exe.
1622
1623expr (Loc.U):
5bf26616 1624 This variable is used internally by Configure to determine the
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1625 full pathname (if any) of the expr program. After Configure runs,
1626 the value is reset to a plain "expr" and is not useful.
1627
1628extensions (Extensions.U):
1629 This variable holds a list of all extension files (both XS and
1630 non-xs linked into the package. It is propagated to Config.pm
1631 and is typically used to test whether a particular extesion
1632 is available.
1633
1634fflushall (fflushall.U):
1635 This symbol, if defined, tells that to flush
1636 all pending stdio output one must loop through all
1637 the stdio file handles stored in an array and fflush them.
1638 Note that if fflushNULL is defined, fflushall will not
1639 even be probed for and will be left undefined.
1640
1641fflushNULL (fflushall.U):
1642 This symbol, if defined, tells that fflush(NULL) does flush
1643 all pending stdio output.
1644
1645find (Loc.U):
1646 This variable is defined but not used by Configure.
1647 The value is a plain '' and is not useful.
1648
1649firstmakefile (Unix.U):
1650 This variable defines the first file searched by make. On unix,
1651 it is makefile (then Makefile). On case-insensitive systems,
1652 it might be something else. This is only used to deal with
1653 convoluted make depend tricks.
1654
1655flex (Loc.U):
1656 This variable is defined but not used by Configure.
1657 The value is a plain '' and is not useful.
1658
1659fpostype (fpostype.U):
1660 This variable defines Fpos_t to be something like fpost_t, long,
1661 uint, or whatever type is used to declare file positions in libc.
1662
1663freetype (mallocsrc.U):
1664 This variable contains the return type of free(). It is usually
1665 void, but occasionally int.
1666
1667full_ar (Loc_ar.U):
1668 This variable contains the full pathname to 'ar', whether or
1669 not the user has specified 'portability'. This is only used
1670 in the Makefile.SH.
1671
1672full_csh (d_csh.U):
1673 This variable contains the full pathname to 'csh', whether or
1674 not the user has specified 'portability'. This is only used
1675 in the compiled C program, and we assume that all systems which
1676 can share this executable will have the same full pathname to
1677 'csh.'
1678
1679full_sed (Loc_sed.U):
1680 This variable contains the full pathname to 'sed', whether or
1681 not the user has specified 'portability'. This is only used
1682 in the compiled C program, and we assume that all systems which
1683 can share this executable will have the same full pathname to
1684 'sed.'
1685
1686gccversion (cc.U):
1687 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1688 indicate whether the compiler is version 1 or 2. This is used in
1689 setting some of the default cflags. It is set to '' if not gcc.
1690
1691gidtype (gidtype.U):
1692 This variable defines Gid_t to be something like gid_t, int,
1693 ushort, or whatever type is used to declare the return type
1694 of getgid(). Typically, it is the type of group ids in the kernel.
1695
1696glibpth (libpth.U):
1697 This variable holds the general path (space-separated) used to
1698 find libraries. It may contain directories that do not exist on
1699 this platform, libpth is the cleaned-up version.
1700
1701grep (Loc.U):
5bf26616 1702 This variable is used internally by Configure to determine the
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1703 full pathname (if any) of the grep program. After Configure runs,
1704 the value is reset to a plain "grep" and is not useful.
1705
1706groupcat (nis.U):
1707 This variable contains a command that produces the text of the
1708 /etc/group file. This is normally "cat /etc/group", but can be
1709 "ypcat group" when NIS is used.
1710
1711groupstype (groupstype.U):
1712 This variable defines Groups_t to be something like gid_t, int,
1713 ushort, or whatever type is used for the second argument to
1714 getgroups() and setgroups(). Usually, this is the same as
1715 gidtype (gid_t), but sometimes it isn't.
1716
1717gzip (Loc.U):
5bf26616 1718 This variable is used internally by Configure to determine the
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1719 full pathname (if any) of the gzip program. After Configure runs,
1720 the value is reset to a plain "gzip" and is not useful.
1721
1722h_fcntl (h_fcntl.U):
1723 This is variable gets set in various places to tell i_fcntl that
1724 <fcntl.h> should be included.
1725
1726h_sysfile (h_sysfile.U):
1727 This is variable gets set in various places to tell i_sys_file that
1728 <sys/file.h> should be included.
1729
1730hint (Oldconfig.U):
1731 Gives the type of hints used for previous answers. May be one of
1732 "default", "recommended" or "previous".
1733
1734hostcat (nis.U):
1735 This variable contains a command that produces the text of the
1736 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1737 "ypcat hosts" when NIS is used.
1738
1739huge (models.U):
1740 This variable contains a flag which will tell the C compiler and loader
1741 to produce a program running with a huge memory model. If the
1742 huge model is not supported, contains the flag to produce large
1743 model programs. It is up to the Makefile to use this.
1744
1745i_arpainet (i_arpainet.U):
1746 This variable conditionally defines the I_ARPA_INET symbol,
1747 and indicates whether a C program should include <arpa/inet.h>.
1748
1749i_bsdioctl (i_sysioctl.U):
1750 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1751 indicates to the C program that <sys/bsdioctl.h> exists and should
1752 be included.
1753
1754i_db (i_db.U):
1755 This variable conditionally defines the I_DB symbol, and indicates
1756 whether a C program may include Berkeley's DB include file <db.h>.
1757
1758i_dbm (i_dbm.U):
1759 This variable conditionally defines the I_DBM symbol, which
1760 indicates to the C program that <dbm.h> exists and should
1761 be included.
1762
1763i_dirent (i_dirent.U):
1764 This variable conditionally defines I_DIRENT, which indicates
1765 to the C program that it should include <dirent.h>.
1766
1767i_dld (i_dld.U):
1768 This variable conditionally defines the I_DLD symbol, which
1769 indicates to the C program that <dld.h> (GNU dynamic loading)
1770 exists and should be included.
1771
1772i_dlfcn (i_dlfcn.U):
1773 This variable conditionally defines the I_DLFCN symbol, which
1774 indicates to the C program that <dlfcn.h> exists and should
1775 be included.
1776
1777i_fcntl (i_fcntl.U):
1778 This variable controls the value of I_FCNTL (which tells
1779 the C program to include <fcntl.h>).
1780
1781i_float (i_float.U):
1782 This variable conditionally defines the I_FLOAT symbol, and indicates
1783 whether a C program may include <float.h> to get symbols like DBL_MAX
1784 or DBL_MIN, i.e. machine dependent floating point values.
1785
1786i_gdbm (i_gdbm.U):
1787 This variable conditionally defines the I_GDBM symbol, which
1788 indicates to the C program that <gdbm.h> exists and should
1789 be included.
1790
1791i_grp (i_grp.U):
1792 This variable conditionally defines the I_GRP symbol, and indicates
1793 whether a C program should include <grp.h>.
1794
1795i_inttypes (i_inttypes.U):
1796 This variable conditionally defines the I_INTTYPES symbol,
1797 and indicates whether a C program should include <inttypes.h>.
1798
1799i_limits (i_limits.U):
1800 This variable conditionally defines the I_LIMITS symbol, and indicates
1801 whether a C program may include <limits.h> to get symbols like WORD_BIT
1802 and friends.
1803
1804i_locale (i_locale.U):
1805 This variable conditionally defines the I_LOCALE symbol,
1806 and indicates whether a C program should include <locale.h>.
1807
1808i_machcthr (i_machcthr.U):
1809 This variable conditionally defines the I_MACH_CTHREADS symbol,
1810 and indicates whether a C program should include <mach/cthreads.h>.
1811
1812i_malloc (i_malloc.U):
1813 This variable conditionally defines the I_MALLOC symbol, and indicates
1814 whether a C program should include <malloc.h>.
1815
1816i_math (i_math.U):
1817 This variable conditionally defines the I_MATH symbol, and indicates
1818 whether a C program may include <math.h>.
1819
1820i_memory (i_memory.U):
1821 This variable conditionally defines the I_MEMORY symbol, and indicates
1822 whether a C program should include <memory.h>.
1823
1824i_mntent (i_mntent.U):
1825 This variable conditionally defines the I_MNTENT symbol, and indicates
1826 whether a C program should include <mntent.h>.
1827
1828i_ndbm (i_ndbm.U):
1829 This variable conditionally defines the I_NDBM symbol, which
1830 indicates to the C program that <ndbm.h> exists and should
1831 be included.
1832
1833i_netdb (i_netdb.U):
1834 This variable conditionally defines the I_NETDB symbol, and indicates
1835 whether a C program should include <netdb.h>.
1836
1837i_neterrno (i_neterrno.U):
1838 This variable conditionally defines the I_NET_ERRNO symbol, which
1839 indicates to the C program that <net/errno.h> exists and should
1840 be included.
1841
1842i_netinettcp (i_netinettcp.U):
1843 This variable conditionally defines the I_NETINET_TCP symbol,
1844 and indicates whether a C program should include <netinet/tcp.h>.
1845
1846i_niin (i_niin.U):
1847 This variable conditionally defines I_NETINET_IN, which indicates
1848 to the C program that it should include <netinet/in.h>. Otherwise,
1849 you may try <sys/in.h>.
1850
1851i_poll (i_poll.U):
1852 This variable conditionally defines the I_POLL symbol, and indicates
1853 whether a C program should include <poll.h>.
1854
1855i_pthread (i_pthread.U):
190b66db 1856 This variable conditionally defines the I_PTHREAD symbol,
781b178c
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1857 and indicates whether a C program should include <pthread.h>.
1858
1859i_pwd (i_pwd.U):
1860 This variable conditionally defines I_PWD, which indicates
1861 to the C program that it should include <pwd.h>.
1862
1863i_rpcsvcdbm (i_dbm.U):
1864 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1865 indicates to the C program that <rpcsvc/dbm.h> exists and should
1866 be included. Some System V systems might need this instead of <dbm.h>.
1867
1868i_sfio (i_sfio.U):
1869 This variable conditionally defines the I_SFIO symbol,
1870 and indicates whether a C program should include <sfio.h>.
1871
1872i_sgtty (i_termio.U):
1873 This variable conditionally defines the I_SGTTY symbol, which
1874 indicates to the C program that it should include <sgtty.h> rather
1875 than <termio.h>.
1876
1877i_shadow (i_shadow.U):
1878 This variable conditionally defines the I_SHADOW symbol, and indicates
1879 whether a C program should include <shadow.h>.
1880
1881i_socks (i_socks.U):
1882 This variable conditionally defines the I_SOCKS symbol, and indicates
1883 whether a C program should include <socks.h>.
1884
1885i_stdarg (i_varhdr.U):
1886 This variable conditionally defines the I_STDARG symbol, which
1887 indicates to the C program that <stdarg.h> exists and should
1888 be included.
1889
1890i_stddef (i_stddef.U):
1891 This variable conditionally defines the I_STDDEF symbol, which
1892 indicates to the C program that <stddef.h> exists and should
1893 be included.
1894
1895i_stdlib (i_stdlib.U):
1896 This variable conditionally defines the I_STDLIB symbol, which
1897 indicates to the C program that <stdlib.h> exists and should
1898 be included.
1899
1900i_string (i_string.U):
1901 This variable conditionally defines the I_STRING symbol, which
1902 indicates that <string.h> should be included rather than <strings.h>.
1903
1904i_sysaccess (i_sysaccess.U):
1905 This variable conditionally defines the I_SYS_ACCESS symbol,
1906 and indicates whether a C program should include <sys/access.h>.
1907
1908i_sysdir (i_sysdir.U):
1909 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1910 whether a C program should include <sys/dir.h>.
1911
1912i_sysfile (i_sysfile.U):
1913 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1914 whether a C program should include <sys/file.h> to get R_OK and friends.
1915
1916i_sysfilio (i_sysioctl.U):
1917 This variable conditionally defines the I_SYS_FILIO symbol, which
1918 indicates to the C program that <sys/filio.h> exists and should
1919 be included in preference to <sys/ioctl.h>.
1920
1921i_sysin (i_niin.U):
1922 This variable conditionally defines I_SYS_IN, which indicates
1923 to the C program that it should include <sys/in.h> instead of
1924 <netinet/in.h>.
1925
1926i_sysioctl (i_sysioctl.U):
1927 This variable conditionally defines the I_SYS_IOCTL symbol, which
1928 indicates to the C program that <sys/ioctl.h> exists and should
1929 be included.
1930
1931i_sysmman (i_sysmman.U):
1932 This variable conditionally defines the I_SYS_MMAN symbol, and
1933 indicates whether a C program should include <sys/mman.h>.
1934
1935i_sysmount (i_sysmount.U):
1936 This variable conditionally defines the I_SYSMOUNT symbol,
1937 and indicates whether a C program should include <sys/mount.h>.
1938
1939i_sysndir (i_sysndir.U):
1940 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1941 whether a C program should include <sys/ndir.h>.
1942
1943i_sysparam (i_sysparam.U):
1944 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1945 whether a C program should include <sys/param.h>.
1946
1947i_sysresrc (i_sysresrc.U):
1948 This variable conditionally defines the I_SYS_RESOURCE symbol,
1949 and indicates whether a C program should include <sys/resource.h>.
1950
1951i_syssecrt (i_syssecrt.U):
1952 This variable conditionally defines the I_SYS_SECURITY symbol,
1953 and indicates whether a C program should include <sys/security.h>.
1954
1955i_sysselct (i_sysselct.U):
1956 This variable conditionally defines I_SYS_SELECT, which indicates
1957 to the C program that it should include <sys/select.h> in order to
1958 get the definition of struct timeval.
1959
1960i_syssockio (i_sysioctl.U):
1961 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1962 C program that socket ioctl codes may be found in <sys/sockio.h>
1963 instead of <sys/ioctl.h>.
1964
1965i_sysstat (i_sysstat.U):
1966 This variable conditionally defines the I_SYS_STAT symbol,
1967 and indicates whether a C program should include <sys/stat.h>.
1968
1969i_sysstatvfs (i_sysstatvfs.U):
1970 This variable conditionally defines the I_SYSSTATVFS symbol,
1971 and indicates whether a C program should include <sys/statvfs.h>.
1972
1973i_systime (i_time.U):
1974 This variable conditionally defines I_SYS_TIME, which indicates
1975 to the C program that it should include <sys/time.h>.
1976
1977i_systimek (i_time.U):
1978 This variable conditionally defines I_SYS_TIME_KERNEL, which
1979 indicates to the C program that it should include <sys/time.h>
1980 with KERNEL defined.
1981
1982i_systimes (i_systimes.U):
1983 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
1984 whether a C program should include <sys/times.h>.
1985
1986i_systypes (i_systypes.U):
1987 This variable conditionally defines the I_SYS_TYPES symbol,
1988 and indicates whether a C program should include <sys/types.h>.
1989
1990i_sysuio (i_sysuio.U):
1991 This variable conditionally defines the I_SYSUIO symbol, and indicates
1992 whether a C program should include <sys/uio.h>.
1993
1994i_sysun (i_sysun.U):
1995 This variable conditionally defines I_SYS_UN, which indicates
1996 to the C program that it should include <sys/un.h> to get UNIX
1997 domain socket definitions.
1998
1999i_syswait (i_syswait.U):
2000 This variable conditionally defines I_SYS_WAIT, which indicates
2001 to the C program that it should include <sys/wait.h>.
2002
2003i_termio (i_termio.U):
2004 This variable conditionally defines the I_TERMIO symbol, which
2005 indicates to the C program that it should include <termio.h> rather
2006 than <sgtty.h>.
2007
2008i_termios (i_termio.U):
2009 This variable conditionally defines the I_TERMIOS symbol, which
2010 indicates to the C program that the POSIX <termios.h> file is
2011 to be included.
2012
2013i_time (i_time.U):
2014 This variable conditionally defines I_TIME, which indicates
2015 to the C program that it should include <time.h>.
2016
2017i_unistd (i_unistd.U):
2018 This variable conditionally defines the I_UNISTD symbol, and indicates
2019 whether a C program should include <unistd.h>.
2020
2021i_utime (i_utime.U):
2022 This variable conditionally defines the I_UTIME symbol, and indicates
2023 whether a C program should include <utime.h>.
2024
2025i_values (i_values.U):
2026 This variable conditionally defines the I_VALUES symbol, and indicates
2027 whether a C program may include <values.h> to get symbols like MAXLONG
2028 and friends.
2029
2030i_varargs (i_varhdr.U):
2031 This variable conditionally defines I_VARARGS, which indicates
2032 to the C program that it should include <varargs.h>.
2033
2034i_varhdr (i_varhdr.U):
2035 Contains the name of the header to be included to get va_dcl definition.
2036 Typically one of varargs.h or stdarg.h.
2037
2038i_vfork (i_vfork.U):
2039 This variable conditionally defines the I_VFORK symbol, and indicates
2040 whether a C program should include vfork.h.
2041
2042ignore_versioned_solibs (libs.U):
2043 This variable should be non-empty if non-versioned shared
2044 libraries (libfoo.so.x.y) are to be ignored (because they
2045 cannot be linked against).
2046
2047incpath (usrinc.U):
2048 This variable must preceed the normal include path to get hte
2049 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2050 Value can be "" or "/bsd43" on mips.
2051
2052inews (Loc.U):
2053 This variable is defined but not used by Configure.
2054 The value is a plain '' and is not useful.
2055
2056installarchlib (archlib.U):
2057 This variable is really the same as archlibexp but may differ on
2058 those systems using AFS. For extra portability, only this variable
2059 should be used in makefiles.
2060
2061installbin (bin.U):
2062 This variable is the same as binexp unless AFS is running in which case
2063 the user is explicitely prompted for it. This variable should always
2064 be used in your makefiles for maximum portability.
2065
2066installman1dir (man1dir.U):
2067 This variable is really the same as man1direxp, unless you are using
2068 AFS in which case it points to the read/write location whereas
2069 man1direxp only points to the read-only access location. For extra
2070 portability, you should only use this variable within your makefiles.
2071
2072installman3dir (man3dir.U):
2073 This variable is really the same as man3direxp, unless you are using
2074 AFS in which case it points to the read/write location whereas
2075 man3direxp only points to the read-only access location. For extra
2076 portability, you should only use this variable within your makefiles.
2077
2078installprefix (installprefix.U):
2079 This variable holds the name of the directory below which
2080 "make install" will install the package. For most users, this
2081 is the same as prefix. However, it is useful for
2082 installing the software into a different (usually temporary)
2083 location after which it can be bundled up and moved somehow
2084 to the final location specified by prefix.
2085
2086installprefixexp (installprefix.U):
2087 This variable holds the full absolute path of installprefix
2088 with all ~-expansion done.
2089
2090installprivlib (privlib.U):
2091 This variable is really the same as privlibexp but may differ on
2092 those systems using AFS. For extra portability, only this variable
2093 should be used in makefiles.
2094
2095installscript (scriptdir.U):
2096 This variable is usually the same as scriptdirexp, unless you are on
2097 a system running AFS, in which case they may differ slightly. You
2098 should always use this variable within your makefiles for portability.
2099
2100installsitearch (sitearch.U):
2101 This variable is really the same as sitearchexp but may differ on
2102 those systems using AFS. For extra portability, only this variable
2103 should be used in makefiles.
2104
2105installsitelib (sitelib.U):
2106 This variable is really the same as sitelibexp but may differ on
2107 those systems using AFS. For extra portability, only this variable
2108 should be used in makefiles.
2109
2110installstyle (installstyle.U):
2111 This variable describes the "style" of the perl installation.
2112 This is intended to be useful for tools that need to
2113 manipulate entire perl distributions. Perl itself doesn't use
2114 this to find its libraries -- the library directories are
2115 stored directly in Config.pm. Currently, there are only two
2116 styles: "lib" and "lib/perl5". The default library locations
2117 (e.g. privlib, sitelib) are either $prefix/lib or
2118 $prefix/lib/perl5. The former is useful if $prefix is a
2119 directory dedicated to perl (e.g. /opt/perl), while the latter
2120 is useful if $prefix is shared by many packages, e.g. if
2121 $prefix=/usr/local.
2122 This may later be extended to include other information, so
2123 be careful with pattern-matching on the results.
2124 For compatibility with perl5.005 and earlier, the default
2125 setting is based on whether or not $prefix contains the string
2126 "perl".
2127
2128installusrbinperl (instubperl.U):
2129 This variable tells whether Perl should be installed also as
2130 /usr/bin/perl in addition to
2131 $installbin/perl
2132
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2133installvendorlib (vendorlib.U):
2134 This variable is really the same as vendorlibexp but may differ on
2135 those systems using AFS. For extra portability, only this variable
2136 should be used in makefiles.
2137
781b178c
JH
2138intsize (intsize.U):
2139 This variable contains the value of the INTSIZE symbol, which
2140 indicates to the C program how many bytes there are in an int.
2141
2142known_extensions (Extensions.U):
2143 This variable holds a list of all XS extensions included in
2144 the package.
2145
2146ksh (Loc.U):
2147 This variable is defined but not used by Configure.
2148 The value is a plain '' and is not useful.
2149
2150large (models.U):
2151 This variable contains a flag which will tell the C compiler and loader
2152 to produce a program running with a large memory model. It is up to
2153 the Makefile to use this.
2154
2155ld (dlsrc.U):
2156 This variable indicates the program to be used to link
2157 libraries for dynamic loading. On some systems, it is 'ld'.
2158 On ELF systems, it should be $cc. Mostly, we'll try to respect
2159 the hint file setting.
2160
2161lddlflags (dlsrc.U):
2162 This variable contains any special flags that might need to be
2163 passed to $ld to create a shared library suitable for dynamic
2164 loading. It is up to the makefile to use it. For hpux, it
2165 should be '-b'. For sunos 4.1, it is empty.
2166
2167ldflags (ccflags.U):
2168 This variable contains any additional C loader flags desired by
2169 the user. It is up to the Makefile to use this.
2170
2171ldlibpthname (libperl.U):
2172 This variable holds the name of the shared library
2173 search path, often LD_LIBRARY_PATH. To get an empty
2174 string, the hints file must set this to 'none'.
2175
2176less (Loc.U):
5bf26616 2177 This variable is used internally by Configure to determine the
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2178 full pathname (if any) of the less program. After Configure runs,
2179 the value is reset to a plain "less" and is not useful.
2180
2181lib_ext (Unix.U):
2182 This is an old synonym for _a.
2183
2184libc (libc.U):
2185 This variable contains the location of the C library.
2186
2187libperl (libperl.U):
2188 The perl executable is obtained by linking perlmain.c with
2189 libperl, any static extensions (usually just DynaLoader),
2190 and any other libraries needed on this system. libperl
2191 is usually libperl.a, but can also be libperl.so.xxx if
2192 the user wishes to build a perl executable with a shared
2193 library.
2194
2195libpth (libpth.U):
2196 This variable holds the general path (space-separated) used to find
2197 libraries. It is intended to be used by other units.
2198
2199libs (libs.U):
2200 This variable holds the additional libraries we want to use.
2201 It is up to the Makefile to deal with it.
2202
2203libswanted (Myinit.U):
2204 This variable holds a list of all the libraries we want to
2205 search. The order is chosen to pick up the c library
2206 ahead of ucb or bsd libraries for SVR4.
2207
2208line (Loc.U):
2209 This variable is defined but not used by Configure.
2210 The value is a plain '' and is not useful.
2211
2212lint (Loc.U):
2213 This variable is defined but not used by Configure.
2214 The value is a plain '' and is not useful.
2215
2216lkflags (ccflags.U):
2217 This variable contains any additional C partial linker flags desired by
2218 the user. It is up to the Makefile to use this.
2219
2220ln (Loc.U):
5bf26616 2221 This variable is used internally by Configure to determine the
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2222 full pathname (if any) of the ln program. After Configure runs,
2223 the value is reset to a plain "ln" and is not useful.
2224
2225lns (lns.U):
2226 This variable holds the name of the command to make
2227 symbolic links (if they are supported). It can be used
2228 in the Makefile. It is either 'ln -s' or 'ln'
2229
2230locincpth (ccflags.U):
2231 This variable contains a list of additional directories to be
2232 searched by the compiler. The appropriate '-I' directives will
2233 be added to ccflags. This is intended to simplify setting
2234 local directories from the Configure command line.
2235 It's not much, but it parallels the loclibpth stuff in libpth.U.
2236
2237loclibpth (libpth.U):
2238 This variable holds the paths (space-separated) used to find local
2239 libraries. It is prepended to libpth, and is intended to be easily
2240 set from the command line.
2241
2242longdblsize (d_longdbl.U):
2243 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2244 indicates to the C program how many bytes there are in a long double,
2245 if this system supports long doubles.
2246
2247longlongsize (d_longlong.U):
2248 This variable contains the value of the LONGLONGSIZE symbol, which
2249 indicates to the C program how many bytes there are in a long long,
2250 if this system supports long long.
2251
2252longsize (intsize.U):
2253 This variable contains the value of the LONGSIZE symbol, which
2254 indicates to the C program how many bytes there are in a long.
2255
2256lp (Loc.U):
2257 This variable is defined but not used by Configure.
2258 The value is a plain '' and is not useful.
2259
2260lpr (Loc.U):
2261 This variable is defined but not used by Configure.
2262 The value is a plain '' and is not useful.
2263
2264ls (Loc.U):
5bf26616 2265 This variable is used internally by Configure to determine the
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2266 full pathname (if any) of the ls program. After Configure runs,
2267 the value is reset to a plain "ls" and is not useful.
2268
2269lseeksize (lseektype.U):
2270 This variable defines lseektype to be something like off_t, long,
2271 or whatever type is used to declare lseek offset's type in the
2272 kernel (which also appears to be lseek's return type).
2273
2274lseektype (lseektype.U):
2275 This variable defines lseektype to be something like off_t, long,
2276 or whatever type is used to declare lseek offset's type in the
2277 kernel (which also appears to be lseek's return type).
2278
2279mail (Loc.U):
2280 This variable is defined but not used by Configure.
2281 The value is a plain '' and is not useful.
2282
2283mailx (Loc.U):
2284 This variable is defined but not used by Configure.
2285 The value is a plain '' and is not useful.
2286
2287make (Loc.U):
5bf26616 2288 This variable is used internally by Configure to determine the
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2289 full pathname (if any) of the make program. After Configure runs,
2290 the value is reset to a plain "make" and is not useful.
2291
2292make_set_make (make.U):
2293 Some versions of 'make' set the variable MAKE. Others do not.
2294 This variable contains the string to be included in Makefile.SH
2295 so that MAKE is set if needed, and not if not needed.
2296 Possible values are:
2297 make_set_make='#' # If your make program handles this for you,
2298 make_set_make="MAKE=$make" # if it doesn't.
2299 I used a comment character so that we can distinguish a
2300 'set' value (from a previous config.sh or Configure '-D' option)
2301 from an uncomputed value.
2302
2303mallocobj (mallocsrc.U):
2304 This variable contains the name of the malloc.o that this package
2305 generates, if that malloc.o is preferred over the system malloc.
2306 Otherwise the value is null. This variable is intended for generating
2307 Makefiles. See mallocsrc.
2308
2309mallocsrc (mallocsrc.U):
2310 This variable contains the name of the malloc.c that comes with
2311 the package, if that malloc.c is preferred over the system malloc.
2312 Otherwise the value is null. This variable is intended for generating
2313 Makefiles.
2314
2315malloctype (mallocsrc.U):
2316 This variable contains the kind of ptr returned by malloc and realloc.
2317
2318man1dir (man1dir.U):
2319 This variable contains the name of the directory in which manual
2320 source pages are to be put. It is the responsibility of the
2321 Makefile.SH to get the value of this into the proper command.
2322 You must be prepared to do the ~name expansion yourself.
2323
2324man1direxp (man1dir.U):
2325 This variable is the same as the man1dir variable, but is filename
2326 expanded at configuration time, for convenient use in makefiles.
2327
2328man1ext (man1dir.U):
2329 This variable contains the extension that the manual page should
2330 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2331 See man1dir.
2332
2333man3dir (man3dir.U):
2334 This variable contains the name of the directory in which manual
2335 source pages are to be put. It is the responsibility of the
2336 Makefile.SH to get the value of this into the proper command.
2337 You must be prepared to do the ~name expansion yourself.
2338
2339man3direxp (man3dir.U):
2340 This variable is the same as the man3dir variable, but is filename
2341 expanded at configuration time, for convenient use in makefiles.
2342
2343man3ext (man3dir.U):
2344 This variable contains the extension that the manual page should
2345 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2346 See man3dir.
2347
2348Mcc (Loc.U):
5bf26616 2349 This variable is used internally by Configure to determine the
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2350 full pathname (if any) of the Mcc program. After Configure runs,
2351 the value is reset to a plain "Mcc" and is not useful.
2352
2353medium (models.U):
2354 This variable contains a flag which will tell the C compiler and loader
2355 to produce a program running with a medium memory model. If the
2356 medium model is not supported, contains the flag to produce large
2357 model programs. It is up to the Makefile to use this.
2358
2359mips_type (usrinc.U):
2360 This variable holds the environment type for the mips system.
2361 Possible values are "BSD 4.3" and "System V".
2362
2363mkdir (Loc.U):
5bf26616 2364 This variable is used internally by Configure to determine the
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2365 full pathname (if any) of the mkdir program. After Configure runs,
2366 the value is reset to a plain "mkdir" and is not useful.
2367
2368mmaptype (d_mmap.U):
2369 This symbol contains the type of pointer returned by mmap()
2370 (and simultaneously the type of the first argument).
2371 It can be 'void *' or 'caddr_t'.
2372
2373models (models.U):
2374 This variable contains the list of memory models supported by this
2375 system. Possible component values are none, split, unsplit, small,
2376 medium, large, and huge. The component values are space separated.
2377
2378modetype (modetype.U):
2379 This variable defines modetype to be something like mode_t,
2380 int, unsigned short, or whatever type is used to declare file
2381 modes for system calls.
2382
2383more (Loc.U):
5bf26616 2384 This variable is used internally by Configure to determine the
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2385 full pathname (if any) of the more program. After Configure runs,
2386 the value is reset to a plain "more" and is not useful.
2387
2388multiarch (multiarch.U):
2389 This variable conditionally defines the MULTIARCH symbol
2390 which signifies the presence of multiplatform files.
2391 This is normally set by hints files.
2392
2393mv (Loc.U):
2394 This variable is defined but not used by Configure.
2395 The value is a plain '' and is not useful.
2396
2397myarchname (archname.U):
2398 This variable holds the architecture name computed by Configure in
2399 a previous run. It is not intended to be perused by any user and
2400 should never be set in a hint file.
2401
2402mydomain (myhostname.U):
2403 This variable contains the eventual value of the MYDOMAIN symbol,
2404 which is the domain of the host the program is going to run on.
2405 The domain must be appended to myhostname to form a complete host name.
2406 The dot comes with mydomain, and need not be supplied by the program.
2407
2408myhostname (myhostname.U):
2409 This variable contains the eventual value of the MYHOSTNAME symbol,
2410 which is the name of the host the program is going to run on.
2411 The domain is not kept with hostname, but must be gotten from mydomain.
2412 The dot comes with mydomain, and need not be supplied by the program.
2413
2414myuname (Oldconfig.U):
2415 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2416 pseudo variables assignments in the output are stripped, thank you. The
2417 whole thing is then lower-cased.
2418
2419n (n.U):
2420 This variable contains the '-n' flag if that is what causes the echo
2421 command to suppress newline. Otherwise it is null. Correct usage is
2422 $echo $n "prompt for a question: $c".
2423
2424netdb_hlen_type (netdbtype.U):
2425 This variable holds the type used for the 2nd argument to
2426 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2427 This is only useful if you have gethostbyaddr(), naturally.
2428
2429netdb_host_type (netdbtype.U):
2430 This variable holds the type used for the 1st argument to
2431 gethostbyaddr(). Usually, this is char * or void *, possibly
2432 with or without a const prefix.
2433 This is only useful if you have gethostbyaddr(), naturally.
2434
2435netdb_name_type (netdbtype.U):
2436 This variable holds the type used for the argument to
2437 gethostbyname(). Usually, this is char * or const char *.
2438 This is only useful if you have gethostbyname(), naturally.
2439
2440netdb_net_type (netdbtype.U):
2441 This variable holds the type used for the 1st argument to
2442 getnetbyaddr(). Usually, this is int or long.
2443 This is only useful if you have getnetbyaddr(), naturally.
2444
2445nm (Loc.U):
5bf26616 2446 This variable is used internally by Configure to determine the
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2447 full pathname (if any) of the nm program. After Configure runs,
2448 the value is reset to a plain "nm" and is not useful.
2449
2450nm_opt (usenm.U):
2451 This variable holds the options that may be necessary for nm.
2452
2453nm_so_opt (usenm.U):
2454 This variable holds the options that may be necessary for nm
2455 to work on a shared library but that can not be used on an
2456 archive library. Currently, this is only used by Linux, where
2457 nm --dynamic is *required* to get symbols from an ELF library which
2458 has been stripped, but nm --dynamic is *fatal* on an archive library.
2459 Maybe Linux should just always set usenm=false.
2460
2461nonxs_ext (Extensions.U):
2462 This variable holds a list of all non-xs extensions included
2463 in the package. All of them will be built.
2464
2465nroff (Loc.U):
5bf26616 2466 This variable is used internally by Configure to determine the
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2467 full pathname (if any) of the nroff program. After Configure runs,
2468 the value is reset to a plain "nroff" and is not useful.
2469
2470o_nonblock (nblock_io.U):
2471 This variable bears the symbol value to be used during open() or fcntl()
2472 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2473 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2474 but that is only supported by some devices.
2475
2476obj_ext (Unix.U):
2477 This is an old synonym for _o.
2478
2479old_pthread_create_joinable (d_pthrattrj.U):
2480 This variable defines the constant to use for creating joinable
2481 (aka undetached) pthreads. Unused if pthread.h defines
2482 PTHREAD_CREATE_JOINABLE. If used, possible values are
2483 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2484
2485optimize (ccflags.U):
2486 This variable contains any optimizer/debugger flag that should be used.
2487 It is up to the Makefile to use it.
2488
2489orderlib (orderlib.U):
2490 This variable is "true" if the components of libraries must be ordered
2491 (with `lorder $* | tsort`) before placing them in an archive. Set to
2492 "false" if ranlib or ar can generate random libraries.
2493
2494osname (Oldconfig.U):
2495 This variable contains the operating system name (e.g. sunos,
2496 solaris, hpux, etc.). It can be useful later on for setting
2497 defaults. Any spaces are replaced with underscores. It is set
2498 to a null string if we can't figure it out.
2499
2500osvers (Oldconfig.U):
2501 This variable contains the operating system version (e.g.
2502 4.1.3, 5.2, etc.). It is primarily used for helping select
2503 an appropriate hints file, but might be useful elsewhere for
2504 setting defaults. It is set to '' if we can't figure it out.
2505 We try to be flexible about how much of the version number
2506 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2507 same for this package, hints files might just be os_4.0 or
2508 os_4.1, etc., not keeping separate files for each little release.
2509
2510package (package.U):
2511 This variable contains the name of the package being constructed.
2512 It is primarily intended for the use of later Configure units.
2513
2514pager (pager.U):
2515 This variable contains the name of the preferred pager on the system.
2516 Usual values are (the full pathnames of) more, less, pg, or cat.
2517
2518passcat (nis.U):
2519 This variable contains a command that produces the text of the
2520 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2521 "ypcat passwd" when NIS is used.
2522
2523patchlevel (patchlevel.U):
2524 The patchlevel level of this package.
2525 The value of patchlevel comes from the patchlevel.h file.
2526
2527path_sep (Unix.U):
2528 This is an old synonym for p_ in Head.U, the character
2529 used to separate elements in the command shell search PATH.
2530
2531perl (Loc.U):
2532 This variable is defined but not used by Configure.
2533 The value is a plain '' and is not useful.
2534
2535perladmin (perladmin.U):
2536 Electronic mail address of the perl5 administrator.
2537
2538perlpath (perlpath.U):
2539 This variable contains the eventual value of the PERLPATH symbol,
2540 which contains the name of the perl interpreter to be used in
2541 shell scripts and in the "eval 'exec'" idiom.
2542
2543pg (Loc.U):
5bf26616 2544 This variable is used internally by Configure to determine the
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2545 full pathname (if any) of the pg program. After Configure runs,
2546 the value is reset to a plain "pg" and is not useful.
2547
2548phostname (myhostname.U):
2549 This variable contains the eventual value of the PHOSTNAME symbol,
2550 which is a command that can be fed to popen() to get the host name.
2551 The program should probably not presume that the domain is or isn't
2552 there already.
2553
2554pidtype (pidtype.U):
2555 This variable defines PIDTYPE to be something like pid_t, int,
2556 ushort, or whatever type is used to declare process ids in the kernel.
2557
2558plibpth (libpth.U):
2559 Holds the private path used by Configure to find out the libraries.
2560 Its value is prepend to libpth. This variable takes care of special
2561 machines, like the mips. Usually, it should be empty.
2562
75347591
JH
2563pm_apiversion (xs_apiversion.U):
2564 This variable contains the version of the oldest perl
2565 compatible with the present perl. (That is, pure perl modules
2566 written for $pm_apiversion will still work for the current
2567 version). perl.c:incpush() and lib/lib.pm will automatically
2568 search in $sitelib for older directories across major versions
2569 back to pm_apiversion. This is only useful if you have a perl
2570 library directory tree structured like the default one. The
2571 versioned site_perl library was introduced in 5.005, so that's
2572 the default setting for this variable. It's hard to imagine
2573 it changing before Perl6. It is included here for symmetry
2574 with xs_apiveprsion -- the searching algorithms will
2575 (presumably) be similar.
2576 See the INSTALL file for how this works.
2577
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2578pmake (Loc.U):
2579 This variable is defined but not used by Configure.
2580 The value is a plain '' and is not useful.
2581
2582pr (Loc.U):
2583 This variable is defined but not used by Configure.
2584 The value is a plain '' and is not useful.
2585
2586prefix (prefix.U):
2587 This variable holds the name of the directory below which the
2588 user will install the package. Usually, this is /usr/local, and
2589 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2590 man pages in /usr/local/man, etc. It is only used to set defaults
2591 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2592
2593prefixexp (prefix.U):
2594 This variable holds the full absolute path of the directory below
2595 which the user will install the package. Derived from prefix.
2596
2597privlib (privlib.U):
2598 This variable contains the eventual value of the PRIVLIB symbol,
2599 which is the name of the private library for this package. It may
2600 have a ~ on the front. It is up to the makefile to eventually create
2601 this directory while performing installation (with ~ substitution).
2602
2603privlibexp (privlib.U):
2604 This variable is the ~name expanded version of privlib, so that you
2605 may use it directly in Makefiles or shell scripts.
2606
2607prototype (prototype.U):
2608 This variable holds the eventual value of CAN_PROTOTYPE, which
2609 indicates the C compiler can handle funciton prototypes.
2610
2611ptrsize (ptrsize.U):
2612 This variable contains the value of the PTRSIZE symbol, which
2613 indicates to the C program how many bytes there are in a pointer.
2614
2615randbits (randfunc.U):
2616 Indicates how many bits are produced by the function used to
2617 generate normalized random numbers.
2618
2619randfunc (randfunc.U):
2620 Indicates the name of the random number function to use.
2621 Values include drand48, random, and rand. In C programs,
2622 the 'Drand01' macro is defined to generate uniformly distributed
2623 random numbers over the range [0., 1.[ (see drand01 and nrand).
2624
2625randseedtype (randfunc.U):
2626 Indicates the type of the argument of the seedfunc.
2627
2628ranlib (orderlib.U):
2629 This variable is set to the pathname of the ranlib program, if it is
2630 needed to generate random libraries. Set to ":" if ar can generate
2631 random libraries or if random libraries are not supported
2632
2633rd_nodata (nblock_io.U):
2634 This variable holds the return code from read() when no data is
2635 present. It should be -1, but some systems return 0 when O_NDELAY is
2636 used, which is a shame because you cannot make the difference between
2637 no data and an EOF.. Sigh!
2638
2639rm (Loc.U):
5bf26616 2640 This variable is used internally by Configure to determine the
781b178c
JH
2641 full pathname (if any) of the rm program. After Configure runs,
2642 the value is reset to a plain "rm" and is not useful.
2643
2644rmail (Loc.U):
2645 This variable is defined but not used by Configure.
2646 The value is a plain '' and is not useful.
2647
2648runnm (usenm.U):
2649 This variable contains 'true' or 'false' depending whether the
2650 nm extraction should be performed or not, according to the value
2651 of usenm and the flags on the Configure command line.
2652
2653sched_yield (d_pthread_y.U):
2654 This variable defines the way to yield the execution
2655 of the current thread.
2656
2657scriptdir (scriptdir.U):
2658 This variable holds the name of the directory in which the user wants
2659 to put publicly scripts for the package in question. It is either
2660 the same directory as for binaries, or a special one that can be
2661 mounted across different architectures, like /usr/share. Programs
2662 must be prepared to deal with ~name expansion.
2663
2664scriptdirexp (scriptdir.U):
2665 This variable is the same as scriptdir, but is filename expanded
2666 at configuration time, for programs not wanting to bother with it.
2667
2668sed (Loc.U):
5bf26616 2669 This variable is used internally by Configure to determine the
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JH
2670 full pathname (if any) of the sed program. After Configure runs,
2671 the value is reset to a plain "sed" and is not useful.
2672
2673seedfunc (randfunc.U):
2674 Indicates the random number generating seed function.
2675 Values include srand48, srandom, and srand.
2676
2677selectminbits (selectminbits.U):
2678 This variable holds the minimum number of bits operated by select.
2679 That is, if you do select(n, ...), how many bits at least will be
2680 cleared in the masks if some activity is detected. Usually this
2681 is either n or 32*ceil(n/32), especially many little-endians do
2682 the latter. This is only useful if you have select(), naturally.
2683
2684selecttype (selecttype.U):
2685 This variable holds the type used for the 2nd, 3rd, and 4th
2686 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2687 is defined, and 'int *' otherwise. This is only useful if you
2688 have select(), naturally.
2689
2690sendmail (Loc.U):
2691 This variable is defined but not used by Configure.
2692 The value is a plain '' and is not useful.
2693
2694sh (sh.U):
2695 This variable contains the full pathname of the shell used
2696 on this system to execute Bourne shell scripts. Usually, this will be
2697 /bin/sh, though it's possible that some systems will have /bin/ksh,
2698 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2699 D:/bin/sh.exe.
2700 This unit comes before Options.U, so you can't set sh with a '-D'
2701 option, though you can override this (and startsh)
2702 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2703
2704shar (Loc.U):
2705 This variable is defined but not used by Configure.
2706 The value is a plain '' and is not useful.
2707
2708sharpbang (spitshell.U):
2709 This variable contains the string #! if this system supports that
2710 construct.
2711
2712shmattype (d_shmat.U):
2713 This symbol contains the type of pointer returned by shmat().
2714 It can be 'void *' or 'char *'.
2715
2716shortsize (intsize.U):
2717 This variable contains the value of the SHORTSIZE symbol which
2718 indicates to the C program how many bytes there are in a short.
2719
2720shrpenv (libperl.U):
2721 If the user builds a shared libperl.so, then we need to tell the
2722 'perl' executable where it will be able to find the installed libperl.so.
2723 One way to do this on some systems is to set the environment variable
2724 LD_RUN_PATH to the directory that will be the final location of the
2725 shared libperl.so. The makefile can use this with something like
2726 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2727 Typical values are
2728 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2729 or
2730 shrpenv=''
2731 See the main perl Makefile.SH for actual working usage.
2732 Alternatively, we might be able to use a command line option such
2733 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2734 $archlibexp/CORE (Linux).
2735
2736shsharp (spitshell.U):
2737 This variable tells further Configure units whether your sh can
2738 handle # comments.
2739
2740sig_count (sig_name.U):
2741 This variable holds a number larger than the largest valid
2742 signal number. This is usually the same as the NSIG macro.
2743
2744sig_name (sig_name.U):
2745 This variable holds the signal names, space separated. The leading
2746 SIG in signal name is removed. A ZERO is prepended to the
2747 list. This is currently not used.
2748
2749sig_name_init (sig_name.U):
2750 This variable holds the signal names, enclosed in double quotes and
2751 separated by commas, suitable for use in the SIG_NAME definition
2752 below. A "ZERO" is prepended to the list, and the list is
2753 terminated with a plain 0. The leading SIG in signal names
2754 is removed. See sig_num.
2755
2756sig_num (sig_name.U):
2757 This variable holds the signal numbers, space separated. A ZERO is
2758 prepended to the list (corresponding to the fake SIGZERO), and
2759 the list is terminated with a 0. Those numbers correspond to
2760 the value of the signal listed in the same place within the
2761 sig_name list.
2762
2763sig_num_init (sig_name.U):
2764 This variable holds the signal numbers, enclosed in double quotes and
2765 separated by commas, suitable for use in the SIG_NUM definition
2766 below. A "ZERO" is prepended to the list, and the list is
2767 terminated with a plain 0.
2768
2769signal_t (d_voidsig.U):
2770 This variable holds the type of the signal handler (void or int).
2771
2772sitearch (sitearch.U):
2773 This variable contains the eventual value of the SITEARCH symbol,
2774 which is the name of the private library for this package. It may
2775 have a ~ on the front. It is up to the makefile to eventually create
2776 this directory while performing installation (with ~ substitution).
2777
2778sitearchexp (sitearch.U):
2779 This variable is the ~name expanded version of sitearch, so that you
2780 may use it directly in Makefiles or shell scripts.
2781
2782sitelib (sitelib.U):
2783 This variable contains the eventual value of the SITELIB symbol,
2784 which is the name of the private library for this package. It may
2785 have a ~ on the front. It is up to the makefile to eventually create
2786 this directory while performing installation (with ~ substitution).
2787
2788sitelibexp (sitelib.U):
2789 This variable is the ~name expanded version of sitelib, so that you
2790 may use it directly in Makefiles or shell scripts.
2791
2792siteprefix (siteprefix.U):
2793 This variable holds the full absolute path of the directory below
2794 which the user will install add-on packages.
2795
2796siteprefixexp (siteprefix.U):
2797 This variable holds the full absolute path of the directory below
2798 which the user will install add-on packages. Derived from siteprefix.
2799
2800sizetype (sizetype.U):
2801 This variable defines sizetype to be something like size_t,
2802 unsigned long, or whatever type is used to declare length
2803 parameters for string functions.
2804
2805sleep (Loc.U):
2806 This variable is defined but not used by Configure.
2807 The value is a plain '' and is not useful.
2808
2809smail (Loc.U):
2810 This variable is defined but not used by Configure.
2811 The value is a plain '' and is not useful.
2812
2813small (models.U):
2814 This variable contains a flag which will tell the C compiler and loader
2815 to produce a program running with a small memory model. It is up to
2816 the Makefile to use this.
2817
2818so (so.U):
2819 This variable holds the extension used to identify shared libraries
2820 (also known as shared objects) on the system. Usually set to 'so'.
2821
2822sockethdr (d_socket.U):
2823 This variable has any cpp '-I' flags needed for socket support.
2824
2825socketlib (d_socket.U):
2826 This variable has the names of any libraries needed for socket support.
2827
2828sort (Loc.U):
5bf26616 2829 This variable is used internally by Configure to determine the
781b178c
JH
2830 full pathname (if any) of the sort program. After Configure runs,
2831 the value is reset to a plain "sort" and is not useful.
2832
2833spackage (package.U):
2834 This variable contains the name of the package being constructed,
2835 with the first letter uppercased, i.e. suitable for starting
2836 sentences.
2837
2838spitshell (spitshell.U):
2839 This variable contains the command necessary to spit out a runnable
2840 shell on this system. It is either cat or a grep '-v' for # comments.
2841
2842split (models.U):
2843 This variable contains a flag which will tell the C compiler and loader
2844 to produce a program that will run in separate I and D space, for those
2845 machines that support separation of instruction and data space. It is
2846 up to the Makefile to use this.
2847
11dc3f68
JH
2848sPRId64 (quadfio.U):
2849 This variable, if defined, contains the string used by stdio to
2850 format 64-bit decimal numbers (format 'd') for output.
2851
2852sPRIeldbl (longdblfio.U):
2853 This variable, if defined, contains the string used by stdio to
2854 format long doubles (format 'e') 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
2860sPRIfldbl (longdblfio.U):
2861 This variable, if defined, contains the string used by stdio to
2862 format long doubles (format 'f') 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
2868sPRIgldbl (longdblfio.U):
2869 This variable, if defined, contains the string used by stdio to
2870 format long doubles (format 'g') 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
2876sPRIi64 (quadfio.U):
2877 This variable, if defined, contains the string used by stdio to
2878 format 64-bit decimal numbers (format 'i') for output.
2879
2880sPRIo64 (quadfio.U):
2881 This variable, if defined, contains the string used by stdio to
2882 format 64-bit octal numbers (format 'o') for output.
2883
2884sPRIu64 (quadfio.U):
2885 This variable, if defined, contains the string used by stdio to
2886 format 64-bit unsigned decimal numbers (format 'u') for output.
2887
2888sPRIx64 (quadfio.U):
2889 This variable, if defined, contains the string used by stdio to
2890 format 64-bit hexadecimal numbers (format 'x') 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
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JH
2896src (src.U):
2897 This variable holds the path to the package source. It is up to
2898 the Makefile to use this variable and set VPATH accordingly to
2899 find the sources remotely.
2900
2901ssizetype (ssizetype.U):
2902 This variable defines ssizetype to be something like ssize_t,
2903 long or int. It is used by functions that return a count
2904 of bytes or an error condition. It must be a signed type.
2905 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2906
2907startperl (startperl.U):
2908 This variable contains the string to put on the front of a perl
2909 script to make sure (hopefully) that it runs with perl and not some
2910 shell. Of course, that leading line must be followed by the classical
2911 perl idiom:
2912 eval 'exec perl -S $0 ${1+"$@"}'
2913 if $running_under_some_shell;
2914 to guarantee perl startup should the shell execute the script. Note
2915 that this magic incatation is not understood by csh.
2916
2917startsh (startsh.U):
2918 This variable contains the string to put on the front of a shell
2919 script to make sure (hopefully) that it runs with sh and not some
2920 other shell.
2921
2922static_ext (Extensions.U):
2923 This variable holds a list of XS extension files we want to
2924 link statically into the package. It is used by Makefile.
2925
2926stdchar (stdchar.U):
2927 This variable conditionally defines STDCHAR to be the type of char
2928 used in stdio.h. It has the values "unsigned char" or "char".
2929
2930stdio_base (d_stdstdio.U):
2931 This variable defines how, given a FILE pointer, fp, to access the
2932 _base field (or equivalent) of stdio.h's FILE structure. This will
2933 be used to define the macro FILE_base(fp).
2934
2935stdio_bufsiz (d_stdstdio.U):
2936 This variable defines how, given a FILE pointer, fp, to determine
2937 the number of bytes store in the I/O buffer pointer to by the
2938 _base field (or equivalent) of stdio.h's FILE structure. This will
2939 be used to define the macro FILE_bufsiz(fp).
2940
2941stdio_cnt (d_stdstdio.U):
2942 This variable defines how, given a FILE pointer, fp, to access the
2943 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2944 be used to define the macro FILE_cnt(fp).
2945
2946stdio_filbuf (d_stdstdio.U):
2947 This variable defines how, given a FILE pointer, fp, to tell
2948 stdio to refill it's internal buffers (?). This will
2949 be used to define the macro FILE_filbuf(fp).
2950
2951stdio_ptr (d_stdstdio.U):
2952 This variable defines how, given a FILE pointer, fp, to access the
2953 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2954 be used to define the macro FILE_ptr(fp).
2955
2956stdio_stream_array (stdio_streams.U):
2957 This variable tells the name of the array holding the stdio streams.
2958 Usual values include _iob, __iob, and __sF.
2959
2960strings (i_string.U):
2961 This variable holds the full path of the string header that will be
2962 used. Typically /usr/include/string.h or /usr/include/strings.h.
2963
2964submit (Loc.U):
2965 This variable is defined but not used by Configure.
2966 The value is a plain '' and is not useful.
2967
2968subversion (patchlevel.U):
2969 The subversion level of this package.
2970 The value of subversion comes from the patchlevel.h file.
2971 This is unique to perl.
2972
2973sysman (sysman.U):
2974 This variable holds the place where the manual is located on this
2975 system. It is not the place where the user wants to put his manual
2976 pages. Rather it is the place where Configure may look to find manual
2977 for unix commands (section 1 of the manual usually). See mansrc.
2978
2979tail (Loc.U):
2980 This variable is defined but not used by Configure.
2981 The value is a plain '' and is not useful.
2982
2983tar (Loc.U):
2984 This variable is defined but not used by Configure.
2985 The value is a plain '' and is not useful.
2986
2987tbl (Loc.U):
2988 This variable is defined but not used by Configure.
2989 The value is a plain '' and is not useful.
2990
2991tee (Loc.U):
2992 This variable is defined but not used by Configure.
2993 The value is a plain '' and is not useful.
2994
2995test (Loc.U):
5bf26616 2996 This variable is used internally by Configure to determine the
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2997 full pathname (if any) of the test program. After Configure runs,
2998 the value is reset to a plain "test" and is not useful.
2999
3000timeincl (i_time.U):
3001 This variable holds the full path of the included time header(s).
3002
3003timetype (d_time.U):
3004 This variable holds the type returned by time(). It can be long,
3005 or time_t on BSD sites (in which case <sys/types.h> should be
3006 included). Anyway, the type Time_t should be used.
3007
3008touch (Loc.U):
5bf26616 3009 This variable is used internally by Configure to determine the
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3010 full pathname (if any) of the touch program. After Configure runs,
3011 the value is reset to a plain "touch" and is not useful.
3012
3013tr (Loc.U):
5bf26616 3014 This variable is used internally by Configure to determine the
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3015 full pathname (if any) of the tr program. After Configure runs,
3016 the value is reset to a plain "tr" and is not useful.
3017
3018trnl (trnl.U):
3019 This variable contains the value to be passed to the tr(1)
3020 command to transliterate a newline. Typical values are
3021 '\012' and '\n'. This is needed for EBCDIC systems where
3022 newline is not necessarily '\012'.
3023
3024troff (Loc.U):
3025 This variable is defined but not used by Configure.
3026 The value is a plain '' and is not useful.
3027
2d228ff3
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3028uidsign (uidsign.U):
3029 This variable contains the signedness of a uidtype.
3030 1 for unsigned, -1 for signed.
3031
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3032uidtype (uidtype.U):
3033 This variable defines Uid_t to be something like uid_t, int,
3034 ushort, or whatever type is used to declare user ids in the kernel.
3035
3036uname (Loc.U):
5bf26616 3037 This variable is used internally by Configure to determine the
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3038 full pathname (if any) of the uname program. After Configure runs,
3039 the value is reset to a plain "uname" and is not useful.
3040
3041uniq (Loc.U):
5bf26616 3042 This variable is used internally by Configure to determine the
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3043 full pathname (if any) of the uniq program. After Configure runs,
3044 the value is reset to a plain "uniq" and is not useful.
3045
3046use64bits (use64bits.U):
3047 This variable conditionally defines the USE_64_BITS symbol,
3048 and indicates that explicit 64-bit interfaces should be used
3049 when available.
3050
3051usedl (dlsrc.U):
3052 This variable indicates if the the system supports dynamic
3053 loading of some sort. See also dlsrc and dlobj.
3054
5bf26616 3055uselargefiles (uselfs.U):
1baac590
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3056 This variable conditionally defines the USE_LARGE_FILES symbol,
3057 and indicates that large file interfaces should be used when
3058 available. The use64bits symbol will also be turned on if necessary.
3059
ca24dfc6
LV
3060uselongdouble (uselongdbl.U):
3061 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3062 and indicates that long doubles should be used when available.
3063
1baac590
JH
3064usemorebits (usemorebits.U):
3065 This variable conditionally defines the USE_MORE_BITS symbol,
3066 and indicates that explicit 64-bit interfaces and long doubles
3067 should be used when available.
3068
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3069usemultiplicity (usemultiplicity.U):
3070 This variable conditionally defines the MULTIPLICITY symbol,
3071 and indicates that Perl should be built to use multiplicity.
3072
3073usemymalloc (mallocsrc.U):
3074 This variable contains y if the malloc that comes with this package
3075 is desired over the system's version of malloc. People often include
3076 special versions of malloc for effiency, but such versions are often
3077 less portable. See also mallocsrc and mallocobj.
3078 If this is 'y', then -lmalloc is removed from $libs.
3079
3080usenm (usenm.U):
3081 This variable contains 'true' or 'false' depending whether the
3082 nm extraction is wanted or not.
3083
3084useopcode (Extensions.U):
3085 This variable holds either 'true' or 'false' to indicate
3086 whether the Opcode extension should be used. The sole
3087 use for this currently is to allow an easy mechanism
3088 for users to skip the Opcode extension from the Configure
3089 command line.
3090
3091useperlio (useperlio.U):
3092 This variable conditionally defines the USE_PERLIO symbol,
3093 and indicates that the PerlIO abstraction should be
3094 used throughout.
3095
3096useposix (Extensions.U):
3097 This variable holds either 'true' or 'false' to indicate
3098 whether the POSIX extension should be used. The sole
3099 use for this currently is to allow an easy mechanism
3100 for hints files to indicate that POSIX will not compile
3101 on a particular system.
3102
3103usesfio (d_sfio.U):
3104 This variable is set to true when the user agrees to use sfio.
3105 It is set to false when sfio is not available or when the user
3106 explicitely requests not to use sfio. It is here primarily so
3107 that command-line settings can override the auto-detection of
3108 d_sfio without running into a "WHOA THERE".
3109
3110useshrplib (libperl.U):
3111 This variable is set to 'yes' if the user wishes
3112 to build a shared libperl, and 'no' otherwise.
3113
3114usesocks (usesocks.U):
3115 This variable conditionally defines the USE_SOCKS symbol,
3116 and indicates that Perl should be built to use SOCKS.
3117
3118usethreads (usethreads.U):
3119 This variable conditionally defines the USE_THREADS symbol,
3120 and indicates that Perl should be built to use threads.
3121
9f50e519
NA
3122usevendorprefix (vendorprefix.U):
3123 This variable tells whether the vendorprefix
3124 and consequently other vendor* paths are in use.
3125
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3126usevfork (d_vfork.U):
3127 This variable is set to true when the user accepts to use vfork.
3128 It is set to false when no vfork is available or when the user
3129 explicitely requests not to use vfork.
3130
3131usrinc (usrinc.U):
3132 This variable holds the path of the include files, which is
3133 usually /usr/include. It is mainly used by other Configure units.
3134
3135uuname (Loc.U):
3136 This variable is defined but not used by Configure.
3137 The value is a plain '' and is not useful.
3138
a3635516
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3139vendorlib (vendorlib.U):
3140 This variable contains the eventual value of the VENDORLIB symbol,
3141 which is the name of the private library for this package. It may
3142 have a ~ on the front. It is up to the makefile to eventually create
3143 this directory while performing installation (with ~ substitution).
3144 Vendors who distribute perl binaries may place their own
3145 extensions and modules in this directory.
3146
3147vendorlibexp (vendorlib.U):
3148 This variable is the ~name expanded version of vendorlib, so that you
3149 may use it directly in Makefiles or shell scripts.
3150
3151vendorprefix (vendorprefix.U):
3152 This variable holds the full absolute path of the directory below
3153 which the vendor will install add-on packages.
3154
3155vendorprefixexp (vendorprefix.U):
3156 This variable holds the full absolute path of the directory below
3157 which the vendor will install add-on packages. Derived from vendorprefix.
3158
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3159version (patchlevel.U):
3160 The full version number of this package. This combines
3161 baserev, patchlevel, and subversion to get the full
3162 version number, including any possible subversions. Care
3163 is taken to use the C locale in order to get something
3164 like 5.004 instead of 5,004. This is unique to perl.
3165
3166vi (Loc.U):
3167 This variable is defined but not used by Configure.
3168 The value is a plain '' and is not useful.
3169
3170voidflags (voidflags.U):
3171 This variable contains the eventual value of the VOIDFLAGS symbol,
3172 which indicates how much support of the void type is given by this
3173 compiler. See VOIDFLAGS for more info.
3174
3175xlibpth (libpth.U):
3176 This variable holds extra path (space-separated) used to find
3177 libraries on this platform, for example CPU-specific libraries
3178 (on multi-CPU platforms) may be listed here.
3179
75347591
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3180xs_apiversion (xs_apiversion.U):
3181 This variable contains the version of the oldest perl binary
3182 compatible with the present perl. perl.c:incpush() and
3183 lib/lib.pm will automatically search in $sitearch for older
3184 directories across major versions back to xs_apiversion.
3185 This is only useful if you have a perl library directory tree
3186 structured like the default one.
3187 See INSTALL for how this works.
3188 The versioned site_perl directory was introduced in 5.005,
3189 so that is the lowest possible value.
3190 Since this can depend on compile time options (such as
3191 bincompat) it is set by Configure. Other non-default sources
3192 of potential incompatibility, such as multiplicity, threads,
3193 debugging, 64bits, sfio, etc., are not checked for currently,
3194 though in principle we could go snooping around in old
3195 Config.pm files.
3196
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3197zcat (Loc.U):
3198 This variable is defined but not used by Configure.
3199 The value is a plain '' and is not useful.
3200
3201zip (Loc.U):
5bf26616 3202 This variable is used internally by Configure to determine the
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3203 full pathname (if any) of the zip program. After Configure runs,
3204 the value is reset to a plain "zip" and is not useful.
3205