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[perl5.git] / Porting / Glossary
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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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537d_fs_data_s (d_statfs.U):
538 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
539 which indicates that the struct fs_data is supported.
540
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541d_fseeko (d_fseeko.U):
542 This variable conditionally defines the HAS_FSEEKO symbol, which
543 indicates to the C program that the fseeko() routine is available.
544
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545d_fsetpos (d_fsetpos.U):
546 This variable conditionally defines HAS_FSETPOS if fsetpos() is
547 available to set the file position indicator.
548
0545a864 549d_fstatfs (d_fstatfs.U):
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550 This variable conditionally defines the HAS_FSTATFS symbol, which
551 indicates to the C program that the fstatfs() routine is available.
552
553d_fstatvfs (d_statvfs.U):
554 This variable conditionally defines the HAS_FSTATVFS symbol, which
555 indicates to the C program that the fstatvfs() routine is available.
556
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557d_ftello (d_ftello.U):
558 This variable conditionally defines the HAS_FTELLO symbol, which
559 indicates to the C program that the ftello() routine is available.
560
561d_ftime (d_ftime.U):
562 This variable conditionally defines the HAS_FTIME symbol, which indicates
563 that the ftime() routine exists. The ftime() routine is basically
564 a sub-second accuracy clock.
565
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566d_Gconvert (d_gconvert.U):
567 This variable holds what Gconvert is defined as to convert
568 floating point numbers into strings. It could be 'gconvert'
569 or a more complex macro emulating gconvert with gcvt() or sprintf.
570 Possible values are:
571 d_Gconvert='gconvert((x),(n),(t),(b))'
572 d_Gconvert='gcvt((x),(n),(b))'
573 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
574
575d_getgrent (d_getgrent.U):
576 This variable conditionally defines the HAS_GETGRENT symbol, which
577 indicates to the C program that the getgrent() routine is available
578 for sequential access of the group database.
579
580d_getgrps (d_getgrps.U):
581 This variable conditionally defines the HAS_GETGROUPS symbol, which
582 indicates to the C program that the getgroups() routine is available
583 to get the list of process groups.
584
585d_gethbyaddr (d_gethbyad.U):
586 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
587 indicates to the C program that the gethostbyaddr() routine is available
588 to look up hosts by their IP addresses.
589
590d_gethbyname (d_gethbynm.U):
591 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
592 indicates to the C program that the gethostbyname() routine is available
593 to look up host names in some data base or other.
594
595d_gethent (d_gethent.U):
596 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
597 available to look up host names in some data base or another.
598
599d_gethname (d_gethname.U):
600 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
601 indicates to the C program that the gethostname() routine may be
602 used to derive the host name.
603
604d_gethostprotos (d_gethostprotos.U):
605 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
606 which indicates to the C program that <netdb.h> supplies
607 prototypes for the various gethost*() functions.
608 See also netdbtype.U for probing for various netdb types.
609
610d_getlogin (d_getlogin.U):
611 This variable conditionally defines the HAS_GETLOGIN symbol, which
612 indicates to the C program that the getlogin() routine is available
613 to get the login name.
614
615d_getmntent (d_getmntent.U):
616 This variable conditionally defines the HAS_GETMNTENT symbol, which
617 indicates to the C program that the getmntent() routine is available
0617aed7 618 to iterate through mounted files to get their mount info.
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619
620d_getnbyaddr (d_getnbyad.U):
621 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
622 indicates to the C program that the getnetbyaddr() routine is available
623 to look up networks by their IP addresses.
624
625d_getnbyname (d_getnbynm.U):
626 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
627 indicates to the C program that the getnetbyname() routine is available
628 to look up networks by their names.
629
630d_getnent (d_getnent.U):
631 This variable conditionally defines HAS_GETNETENT if getnetent() is
632 available to look up network names in some data base or another.
633
634d_getnetprotos (d_getnetprotos.U):
635 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
636 which indicates to the C program that <netdb.h> supplies
637 prototypes for the various getnet*() functions.
638 See also netdbtype.U for probing for various netdb types.
639
640d_getpbyname (d_getprotby.U):
641 This variable conditionally defines the HAS_GETPROTOBYNAME
642 symbol, which indicates to the C program that the
643 getprotobyname() routine is available to look up protocols
644 by their name.
645
646d_getpbynumber (d_getprotby.U):
647 This variable conditionally defines the HAS_GETPROTOBYNUMBER
648 symbol, which indicates to the C program that the
649 getprotobynumber() routine is available to look up protocols
650 by their number.
651
652d_getpent (d_getpent.U):
653 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
654 available to look up protocols in some data base or another.
655
656d_getpgid (d_getpgid.U):
657 This variable conditionally defines the HAS_GETPGID symbol, which
658 indicates to the C program that the getpgid(pid) function
659 is available to get the process group id.
660
661d_getpgrp2 (d_getpgrp2.U):
662 This variable conditionally defines the HAS_GETPGRP2 symbol, which
663 indicates to the C program that the getpgrp2() (as in DG/UX) routine
664 is available to get the current process group.
665
666d_getpgrp (d_getpgrp.U):
667 This variable conditionally defines HAS_GETPGRP if getpgrp() is
668 available to get the current process group.
669
670d_getppid (d_getppid.U):
671 This variable conditionally defines the HAS_GETPPID symbol, which
672 indicates to the C program that the getppid() routine is available
673 to get the parent process ID.
674
675d_getprior (d_getprior.U):
676 This variable conditionally defines HAS_GETPRIORITY if getpriority()
677 is available to get a process's priority.
678
679d_getprotoprotos (d_getprotoprotos.U):
680 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
681 which indicates to the C program that <netdb.h> supplies
682 prototypes for the various getproto*() functions.
683 See also netdbtype.U for probing for various netdb types.
684
685d_getpwent (d_getpwent.U):
686 This variable conditionally defines the HAS_GETPWENT symbol, which
687 indicates to the C program that the getpwent() routine is available
688 for sequential access of the passwd database.
689
690d_getsbyname (d_getsrvby.U):
691 This variable conditionally defines the HAS_GETSERVBYNAME
692 symbol, which indicates to the C program that the
693 getservbyname() routine is available to look up services
694 by their name.
695
696d_getsbyport (d_getsrvby.U):
697 This variable conditionally defines the HAS_GETSERVBYPORT
698 symbol, which indicates to the C program that the
699 getservbyport() routine is available to look up services
700 by their port.
701
702d_getsent (d_getsent.U):
703 This variable conditionally defines HAS_GETSERVENT if getservent() is
704 available to look up network services in some data base or another.
705
706d_getservprotos (d_getservprotos.U):
707 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
708 which indicates to the C program that <netdb.h> supplies
709 prototypes for the various getserv*() functions.
710 See also netdbtype.U for probing for various netdb types.
711
712d_getspent (d_getspent.U):
713 This variable conditionally defines HAS_GETSPENT if getspent() is
714 available to retrieve SysV shadow password entries sequentially.
715
716d_getspnam (d_getspnam.U):
717 This variable conditionally defines HAS_GETSPNAM if getspnam() is
718 available to retrieve SysV shadow password entries by name.
719
720d_gettimeod (d_ftime.U):
721 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
722 indicates that the gettimeofday() system call exists (to obtain a
723 sub-second accuracy clock). You should probably include <sys/resource.h>.
724
725d_gnulibc (d_gnulibc.U):
726 Defined if we're dealing with the GNU C Library.
727
728d_grpasswd (i_grp.U):
729 This variable conditionally defines GRPASSWD, which indicates
730 that struct group in <grp.h> contains gr_passwd.
731
732d_hasmntopt (d_hasmntopt.U):
733 This variable conditionally defines the HAS_HASMNTOPT symbol, which
734 indicates to the C program that the hasmntopt() routine is available
735 to query the mount options of file systems.
736
737d_htonl (d_htonl.U):
738 This variable conditionally defines HAS_HTONL if htonl() and its
739 friends are available to do network order byte swapping.
740
741d_index (d_strchr.U):
742 This variable conditionally defines HAS_INDEX if index() and
743 rindex() are available for string searching.
744
745d_inetaton (d_inetaton.U):
746 This variable conditionally defines the HAS_INET_ATON symbol, which
747 indicates to the C program that the inet_aton() function is available
748 to parse IP address "dotted-quad" strings.
749
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750d_int64t (i_inttypes.U):
751 This symbol will be defined if the C compiler supports int64_t.
752
753d_iovec_s (i_sysuio.U):
754 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
755 which indicates that the struct iovec is supported.
756
757d_isascii (d_isascii.U):
758 This variable conditionally defines the HAS_ISASCII constant,
759 which indicates to the C program that isascii() is available.
760
761d_killpg (d_killpg.U):
762 This variable conditionally defines the HAS_KILLPG symbol, which
763 indicates to the C program that the killpg() routine is available
764 to kill process groups.
765
766d_lchown (d_lchown.U):
767 This variable conditionally defines the HAS_LCHOWN symbol, which
768 indicates to the C program that the lchown() routine is available
769 to operate on a symbolic link (instead of following the link).
770
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771d_ldbl_dig (d_ldbl_dig.U):
772 This variable conditionally defines d_ldbl_dig if this system's
773 header files provide LDBL_DIG, which is the number of significant
774 digits in a long double precision number.
775
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776d_link (d_link.U):
777 This variable conditionally defines HAS_LINK if link() is
778 available to create hard links.
779
780d_llseek (io64.U):
781 This variable conditionally defines the HAS_LLSEEK symbol, which
782 indicates to the C program that the llseek() routine is available.
783
784d_locconv (d_locconv.U):
785 This variable conditionally defines HAS_LOCALECONV if localeconv() is
786 available for numeric and monetary formatting conventions.
787
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788d_lockf (d_lockf.U):
789 This variable conditionally defines HAS_LOCKF if lockf() is
790 available to do file locking.
791
792d_longdbl (d_longdbl.U):
793 This variable conditionally defines HAS_LONG_DOUBLE if
794 the long double type is supported.
795
796d_longlong (d_longlong.U):
797 This variable conditionally defines HAS_LONG_LONG if
798 the long long type is supported.
799
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800d_lstat (d_lstat.U):
801 This variable conditionally defines HAS_LSTAT if lstat() is
802 available to do file stats on symbolic links.
803
804d_madvise (d_madvise.U):
805 This variable conditionally defines HAS_MADVISE if madvise() is
806 available to map a file into memory.
807
808d_mblen (d_mblen.U):
809 This variable conditionally defines the HAS_MBLEN symbol, which
810 indicates to the C program that the mblen() routine is available
811 to find the number of bytes in a multibye character.
812
813d_mbstowcs (d_mbstowcs.U):
814 This variable conditionally defines the HAS_MBSTOWCS symbol, which
815 indicates to the C program that the mbstowcs() routine is available
816 to convert a multibyte string into a wide character string.
817
818d_mbtowc (d_mbtowc.U):
819 This variable conditionally defines the HAS_MBTOWC symbol, which
820 indicates to the C program that the mbtowc() routine is available
821 to convert multibyte to a wide character.
822
823d_memchr (d_memchr.U):
824 This variable conditionally defines the HAS_MEMCHR symbol, which
825 indicates to the C program that the memchr() routine is available
826 to locate characters within a C string.
827
828d_memcmp (d_memcmp.U):
829 This variable conditionally defines the HAS_MEMCMP symbol, which
830 indicates to the C program that the memcmp() routine is available
831 to compare blocks of memory.
832
833d_memcpy (d_memcpy.U):
834 This variable conditionally defines the HAS_MEMCPY symbol, which
835 indicates to the C program that the memcpy() routine is available
836 to copy blocks of memory.
837
838d_memmove (d_memmove.U):
839 This variable conditionally defines the HAS_MEMMOVE symbol, which
840 indicates to the C program that the memmove() routine is available
841 to copy potentatially overlapping blocks of memory.
842
843d_memset (d_memset.U):
844 This variable conditionally defines the HAS_MEMSET symbol, which
845 indicates to the C program that the memset() routine is available
846 to set blocks of memory.
847
848d_mkdir (d_mkdir.U):
849 This variable conditionally defines the HAS_MKDIR symbol, which
850 indicates to the C program that the mkdir() routine is available
851 to create directories..
852
853d_mkfifo (d_mkfifo.U):
854 This variable conditionally defines the HAS_MKFIFO symbol, which
855 indicates to the C program that the mkfifo() routine is available.
856
857d_mktime (d_mktime.U):
858 This variable conditionally defines the HAS_MKTIME symbol, which
859 indicates to the C program that the mktime() routine is available.
860
861d_mmap (d_mmap.U):
862 This variable conditionally defines HAS_MMAP if mmap() is
863 available to map a file into memory.
864
865d_mprotect (d_mprotect.U):
866 This variable conditionally defines HAS_MPROTECT if mprotect() is
867 available to modify the access protection of a memory mapped file.
868
869d_msg (d_msg.U):
870 This variable conditionally defines the HAS_MSG symbol, which
871 indicates that the entire msg*(2) library is present.
872
873d_msg_ctrunc (d_socket.U):
874 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
875 which indicates that the MSG_CTRUNC is available. #ifdef is
876 not enough because it may be an enum, glibc has been known to do this.
877
878d_msg_dontroute (d_socket.U):
879 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
880 which indicates that the MSG_DONTROUTE is available. #ifdef is
881 not enough because it may be an enum, glibc has been known to do this.
882
883d_msg_oob (d_socket.U):
884 This variable conditionally defines the HAS_MSG_OOB symbol,
885 which indicates that the MSG_OOB is available. #ifdef is
886 not enough because it may be an enum, glibc has been known to do this.
887
888d_msg_peek (d_socket.U):
889 This variable conditionally defines the HAS_MSG_PEEK symbol,
890 which indicates that the MSG_PEEK is available. #ifdef is
891 not enough because it may be an enum, glibc has been known to do this.
892
893d_msg_proxy (d_socket.U):
894 This variable conditionally defines the HAS_MSG_PROXY symbol,
895 which indicates that the MSG_PROXY is available. #ifdef is
896 not enough because it may be an enum, glibc has been known to do this.
897
898d_msgctl (d_msgctl.U):
899 This variable conditionally defines the HAS_MSGCTL symbol, which
900 indicates to the C program that the msgctl() routine is available.
901
902d_msgget (d_msgget.U):
903 This variable conditionally defines the HAS_MSGGET symbol, which
904 indicates to the C program that the msgget() routine is available.
905
906d_msghdr_s (d_socket.U):
907 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
908 which indicates that the struct msghdr is supported.
909
910d_msgrcv (d_msgrcv.U):
911 This variable conditionally defines the HAS_MSGRCV symbol, which
912 indicates to the C program that the msgrcv() routine is available.
913
914d_msgsnd (d_msgsnd.U):
915 This variable conditionally defines the HAS_MSGSND symbol, which
916 indicates to the C program that the msgsnd() routine is available.
917
918d_msync (d_msync.U):
919 This variable conditionally defines HAS_MSYNC if msync() is
920 available to synchronize a mapped file.
921
922d_munmap (d_munmap.U):
923 This variable conditionally defines HAS_MUNMAP if munmap() is
924 available to unmap a region mapped by mmap().
925
926d_mymalloc (mallocsrc.U):
927 This variable conditionally defines MYMALLOC in case other parts
928 of the source want to take special action if MYMALLOC is used.
929 This may include different sorts of profiling or error detection.
930
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931d_nice (d_nice.U):
932 This variable conditionally defines the HAS_NICE symbol, which
933 indicates to the C program that the nice() routine is available.
934
935d_off64_t (io64.U):
936 This symbol will be defined if the C compiler supports off64_t.
937
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938d_old_pthread_create_joinable (d_pthrattrj.U):
939 This variable conditionally defines pthread_create_joinable.
940 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
941
942d_oldpthreads (usethreads.U):
943 This variable conditionally defines the OLD_PTHREADS_API symbol,
944 and indicates that Perl should be built to use the old
8c09e4ca 945 draft POSIX threads API. This is only potentially meaningful if
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946 usethreads is set.
947
948d_oldsock (d_socket.U):
949 This variable conditionally defines the OLDSOCKET symbol, which
950 indicates that the BSD socket interface is based on 4.1c and not 4.2.
951
952d_open3 (d_open3.U):
953 This variable conditionally defines the HAS_OPEN3 manifest constant,
954 which indicates to the C program that the 3 argument version of
955 the open(2) function is available.
956
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957d_pathconf (d_pathconf.U):
958 This variable conditionally defines the HAS_PATHCONF symbol, which
959 indicates to the C program that the pathconf() routine is available
960 to determine file-system related limits and options associated
961 with a given filename.
962
963d_pause (d_pause.U):
964 This variable conditionally defines the HAS_PAUSE symbol, which
965 indicates to the C program that the pause() routine is available
966 to suspend a process until a signal is received.
967
968d_phostname (d_gethname.U):
969 This variable conditionally defines the HAS_PHOSTNAME symbol, which
970 contains the shell command which, when fed to popen(), may be
971 used to derive the host name.
972
973d_pipe (d_pipe.U):
974 This variable conditionally defines the HAS_PIPE symbol, which
975 indicates to the C program that the pipe() routine is available
976 to create an inter-process channel.
977
978d_poll (d_poll.U):
979 This variable conditionally defines the HAS_POLL symbol, which
980 indicates to the C program that the poll() routine is available
981 to poll active file descriptors.
982
983d_portable (d_portable.U):
984 This variable conditionally defines the PORTABLE symbol, which
985 indicates to the C program that it should not assume that it is
986 running on the machine it was compiled on.
987
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988d_PRId64 (quadfio.U):
989 This variable conditionally defines the PERL_PRId64 symbol, which
990 indiciates that stdio has a symbol to print 64-bit decimal numbers.
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_PRIEldbl (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_PRIFldbl (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_PRIGldbl (longdblfio.U):
1013 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1014 indiciates that stdio has a symbol to print long doubles.
1015
1016d_PRIi64 (quadfio.U):
1017 This variable conditionally defines the PERL_PRIi64 symbol, which
1018 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1019
1020d_PRIo64 (quadfio.U):
1021 This variable conditionally defines the PERL_PRIo64 symbol, which
1022 indiciates that stdio has a symbol to print 64-bit octal numbers.
1023
1024d_PRIu64 (quadfio.U):
1025 This variable conditionally defines the PERL_PRIu64 symbol, which
1026 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1027 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
1033d_PRIX64 (quadfio.U):
1034 This variable conditionally defines the PERL_PRIX64 symbol, which
1035 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1036
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1037d_pthread_yield (d_pthread_y.U):
1038 This variable conditionally defines the HAS_PTHREAD_YIELD
1039 symbol if the pthread_yield routine is available to yield
1040 the execution of the current thread.
1041
1042d_pwage (i_pwd.U):
1043 This variable conditionally defines PWAGE, which indicates
1044 that struct passwd contains pw_age.
1045
1046d_pwchange (i_pwd.U):
1047 This variable conditionally defines PWCHANGE, which indicates
1048 that struct passwd contains pw_change.
1049
1050d_pwclass (i_pwd.U):
1051 This variable conditionally defines PWCLASS, which indicates
1052 that struct passwd contains pw_class.
1053
1054d_pwcomment (i_pwd.U):
1055 This variable conditionally defines PWCOMMENT, which indicates
1056 that struct passwd contains pw_comment.
1057
1058d_pwexpire (i_pwd.U):
1059 This variable conditionally defines PWEXPIRE, which indicates
1060 that struct passwd contains pw_expire.
1061
1062d_pwgecos (i_pwd.U):
1063 This variable conditionally defines PWGECOS, which indicates
1064 that struct passwd contains pw_gecos.
1065
1066d_pwpasswd (i_pwd.U):
1067 This variable conditionally defines PWPASSWD, which indicates
1068 that struct passwd contains pw_passwd.
1069
1070d_pwquota (i_pwd.U):
1071 This variable conditionally defines PWQUOTA, which indicates
1072 that struct passwd contains pw_quota.
1073
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1074d_readdir (d_readdir.U):
1075 This variable conditionally defines HAS_READDIR if readdir() is
1076 available to read directory entries.
1077
1078d_readlink (d_readlink.U):
1079 This variable conditionally defines the HAS_READLINK symbol, which
1080 indicates to the C program that the readlink() routine is available
1081 to read the value of a symbolic link.
1082
1083d_readv (d_readv.U):
1084 This variable conditionally defines the HAS_READV symbol, which
1085 indicates to the C program that the readv() routine is available.
1086
1087d_recvmsg (d_socket.U):
1088 This variable conditionally defines the HAS_RECVMSG symbol,
1089 which indicates that the recvmsg is supported.
1090
1091d_rename (d_rename.U):
1092 This variable conditionally defines the HAS_RENAME symbol, which
1093 indicates to the C program that the rename() routine is available
1094 to rename files.
1095
1096d_rewinddir (d_readdir.U):
1097 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1098 available.
1099
1100d_rmdir (d_rmdir.U):
1101 This variable conditionally defines HAS_RMDIR if rmdir() is
1102 available to remove directories.
1103
1104d_safebcpy (d_safebcpy.U):
1105 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1106 the bcopy() routine can do overlapping copies.
1107
1108d_safemcpy (d_safemcpy.U):
1109 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1110 the memcpy() routine can do overlapping copies.
1111
1112d_sanemcmp (d_sanemcmp.U):
1113 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1114 the memcpy() routine is available and can be used to compare relative
1115 magnitudes of chars with their high bits set.
1116
1117d_sched_yield (d_pthread_y.U):
1118 This variable conditionally defines the HAS_SCHED_YIELD
1119 symbol if the sched_yield routine is available to yield
1120 the execution of the current thread.
1121
1122d_scm_rights (d_socket.U):
1123 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1124 which indicates that the SCM_RIGHTS is available. #ifdef is
1125 not enough because it may be an enum, glibc has been known to do this.
1126
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1127d_seekdir (d_readdir.U):
1128 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1129 available.
1130
1131d_select (d_select.U):
1132 This variable conditionally defines HAS_SELECT if select() is
1133 available to select active file descriptors. A <sys/time.h>
1134 inclusion may be necessary for the timeout field.
1135
1136d_sem (d_sem.U):
1137 This variable conditionally defines the HAS_SEM symbol, which
1138 indicates that the entire sem*(2) library is present.
1139
1140d_semctl (d_semctl.U):
1141 This variable conditionally defines the HAS_SEMCTL symbol, which
1142 indicates to the C program that the semctl() routine is available.
1143
1144d_semctl_semid_ds (d_union_semun.U):
1145 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1146 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1147
1148d_semctl_semun (d_union_semun.U):
1149 This variable conditionally defines USE_SEMCTL_SEMUN, which
1150 indicates that union semun is to be used for semctl IPC_STAT.
1151
1152d_semget (d_semget.U):
1153 This variable conditionally defines the HAS_SEMGET symbol, which
1154 indicates to the C program that the semget() routine is available.
1155
1156d_semop (d_semop.U):
1157 This variable conditionally defines the HAS_SEMOP symbol, which
1158 indicates to the C program that the semop() routine is available.
1159
1160d_sendmsg (d_socket.U):
1161 This variable conditionally defines the HAS_SENDMSG symbol,
1162 which indicates that the sendmsg is supported.
1163
1164d_setegid (d_setegid.U):
1165 This variable conditionally defines the HAS_SETEGID symbol, which
1166 indicates to the C program that the setegid() routine is available
1167 to change the effective gid of the current program.
1168
1169d_seteuid (d_seteuid.U):
1170 This variable conditionally defines the HAS_SETEUID symbol, which
1171 indicates to the C program that the seteuid() routine is available
1172 to change the effective uid of the current program.
1173
1174d_setgrent (d_setgrent.U):
1175 This variable conditionally defines the HAS_SETGRENT symbol, which
1176 indicates to the C program that the setgrent() routine is available
1177 for initializing sequential access to the group database.
1178
1179d_setgrps (d_setgrps.U):
1180 This variable conditionally defines the HAS_SETGROUPS symbol, which
1181 indicates to the C program that the setgroups() routine is available
1182 to set the list of process groups.
1183
1184d_sethent (d_sethent.U):
1185 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1186 available.
1187
1188d_setlinebuf (d_setlnbuf.U):
1189 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1190 indicates to the C program that the setlinebuf() routine is available
1191 to change stderr or stdout from block-buffered or unbuffered to a
1192 line-buffered mode.
1193
1194d_setlocale (d_setlocale.U):
1195 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1196 available to handle locale-specific ctype implementations.
1197
1198d_setnent (d_setnent.U):
1199 This variable conditionally defines HAS_SETNETENT if setnetent() is
1200 available.
1201
1202d_setpent (d_setpent.U):
1203 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1204 available.
1205
1206d_setpgid (d_setpgid.U):
1207 This variable conditionally defines the HAS_SETPGID symbol if the
1208 setpgid(pid, gpid) function is available to set process group ID.
1209
1210d_setpgrp2 (d_setpgrp2.U):
1211 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1212 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1213 is available to set the current process group.
1214
1215d_setpgrp (d_setpgrp.U):
1216 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1217 available to set the current process group.
1218
1219d_setprior (d_setprior.U):
1220 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1221 is available to set a process's priority.
1222
1223d_setpwent (d_setpwent.U):
1224 This variable conditionally defines the HAS_SETPWENT symbol, which
1225 indicates to the C program that the setpwent() routine is available
1226 for initializing sequential access to the passwd database.
1227
1228d_setregid (d_setregid.U):
1229 This variable conditionally defines HAS_SETREGID if setregid() is
1230 available to change the real and effective gid of the current
1231 process.
1232
1233d_setresgid (d_setregid.U):
1234 This variable conditionally defines HAS_SETRESGID if setresgid() is
1235 available to change the real, effective and saved gid of the current
1236 process.
1237
1238d_setresuid (d_setreuid.U):
1239 This variable conditionally defines HAS_SETREUID if setresuid() is
1240 available to change the real, effective and saved uid of the current
1241 process.
1242
1243d_setreuid (d_setreuid.U):
1244 This variable conditionally defines HAS_SETREUID if setreuid() is
1245 available to change the real and effective uid of the current
1246 process.
1247
1248d_setrgid (d_setrgid.U):
1249 This variable conditionally defines the HAS_SETRGID symbol, which
1250 indicates to the C program that the setrgid() routine is available
1251 to change the real gid of the current program.
1252
1253d_setruid (d_setruid.U):
1254 This variable conditionally defines the HAS_SETRUID symbol, which
1255 indicates to the C program that the setruid() routine is available
1256 to change the real uid of the current program.
1257
1258d_setsent (d_setsent.U):
1259 This variable conditionally defines HAS_SETSERVENT if setservent() is
1260 available.
1261
1262d_setsid (d_setsid.U):
1263 This variable conditionally defines HAS_SETSID if setsid() is
1264 available to set the process group ID.
1265
1266d_setspent (d_setspent.U):
1267 This variable conditionally defines HAS_SETSPENT if setspent() is
1268 available to initialize the scan of SysV shadow password entries.
1269
1270d_setvbuf (d_setvbuf.U):
1271 This variable conditionally defines the HAS_SETVBUF symbol, which
1272 indicates to the C program that the setvbuf() routine is available
1273 to change buffering on an open stdio stream.
1274
1275d_sfio (d_sfio.U):
1276 This variable conditionally defines the USE_SFIO symbol,
1277 and indicates whether sfio is available (and should be used).
1278
1279d_shm (d_shm.U):
1280 This variable conditionally defines the HAS_SHM symbol, which
1281 indicates that the entire shm*(2) library is present.
1282
1283d_shmat (d_shmat.U):
1284 This variable conditionally defines the HAS_SHMAT symbol, which
1285 indicates to the C program that the shmat() routine is available.
1286
1287d_shmatprototype (d_shmat.U):
1288 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1289 symbol, which indicates that sys/shm.h has a prototype for
1290 shmat.
1291
1292d_shmctl (d_shmctl.U):
1293 This variable conditionally defines the HAS_SHMCTL symbol, which
1294 indicates to the C program that the shmctl() routine is available.
1295
1296d_shmdt (d_shmdt.U):
1297 This variable conditionally defines the HAS_SHMDT symbol, which
1298 indicates to the C program that the shmdt() routine is available.
1299
1300d_shmget (d_shmget.U):
1301 This variable conditionally defines the HAS_SHMGET symbol, which
1302 indicates to the C program that the shmget() routine is available.
1303
1304d_sigaction (d_sigaction.U):
1305 This variable conditionally defines the HAS_SIGACTION symbol, which
1306 indicates that the Vr4 sigaction() routine is available.
1307
1308d_sigsetjmp (d_sigsetjmp.U):
1309 This variable conditionally defines the HAS_SIGSETJMP symbol,
1310 which indicates that the sigsetjmp() routine is available to
1311 call setjmp() and optionally save the process's signal mask.
1312
1313d_socket (d_socket.U):
1314 This variable conditionally defines HAS_SOCKET, which indicates
1315 that the BSD socket interface is supported.
1316
1317d_sockpair (d_socket.U):
1318 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1319 indicates that the BSD socketpair() is supported.
1320
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1321d_sqrtl (d_sqrtl.U):
1322 This variable conditionally defines the HAS_SQRTL symbol, which
1323 indicates to the C program that the sqrtl() routine is available.
1324
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1325d_statblks (d_statblks.U):
1326 This variable conditionally defines USE_STAT_BLOCKS
1327 if this system has a stat structure declaring
1328 st_blksize and st_blocks.
1329
1330d_statfs (d_statfs.U):
1331 This variable conditionally defines the HAS_STATFS symbol, which
1332 indicates to the C program that the statfs() routine is available.
1333
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1334d_statfs_f_flags (d_statfs.U):
1335 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
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1336 symbol, which indicates to struct statfs from has f_flags member.
1337 This kind of struct statfs is coming from sys/mount.h (BSD),
1338 not from sys/statfs.h (SYSV).
1339
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1340d_statfs_s (d_statfs.U):
1341 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1342 which indicates that the struct statfs is supported.
1343
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1344d_statvfs (d_statvfs.U):
1345 This variable conditionally defines the HAS_STATVFS symbol, which
1346 indicates to the C program that the statvfs() routine is available.
1347
1348d_stdio_cnt_lval (d_stdstdio.U):
1349 This variable conditionally defines STDIO_CNT_LVALUE if the
1350 FILE_cnt macro can be used as an lvalue.
1351
1352d_stdio_ptr_lval (d_stdstdio.U):
1353 This variable conditionally defines STDIO_PTR_LVALUE if the
1354 FILE_ptr macro can be used as an lvalue.
1355
1356d_stdio_stream_array (stdio_streams.U):
1357 This variable tells whether there is an array holding
1358 the stdio streams.
1359
1360d_stdiobase (d_stdstdio.U):
1361 This variable conditionally defines USE_STDIO_BASE if this system
1362 has a FILE structure declaring a usable _base field (or equivalent)
1363 in stdio.h.
1364
1365d_stdstdio (d_stdstdio.U):
1366 This variable conditionally defines USE_STDIO_PTR if this system
1367 has a FILE structure declaring usable _ptr and _cnt fields (or
1368 equivalent) in stdio.h.
1369
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1370d_strchr (d_strchr.U):
1371 This variable conditionally defines HAS_STRCHR if strchr() and
1372 strrchr() are available for string searching.
1373
1374d_strcoll (d_strcoll.U):
1375 This variable conditionally defines HAS_STRCOLL if strcoll() is
1376 available to compare strings using collating information.
1377
1378d_strctcpy (d_strctcpy.U):
1379 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1380 indicates to the C program that this C compiler knows how to copy
1381 structures.
1382
1383d_strerrm (d_strerror.U):
1384 This variable holds what Strerrr is defined as to translate an error
1385 code condition into an error message string. It could be 'strerror'
1386 or a more complex macro emulating strrror with sys_errlist[], or the
1387 "unknown" string when both strerror and sys_errlist are missing.
1388
1389d_strerror (d_strerror.U):
1390 This variable conditionally defines HAS_STRERROR if strerror() is
1391 available to translate error numbers to strings.
1392
1393d_strtod (d_strtod.U):
1394 This variable conditionally defines the HAS_STRTOD symbol, which
1395 indicates to the C program that the strtod() routine is available
1396 to provide better numeric string conversion than atof().
1397
1398d_strtol (d_strtol.U):
1399 This variable conditionally defines the HAS_STRTOL symbol, which
1400 indicates to the C program that the strtol() routine is available
1401 to provide better numeric string conversion than atoi() and friends.
1402
1403d_strtoul (d_strtoul.U):
1404 This variable conditionally defines the HAS_STRTOUL symbol, which
1405 indicates to the C program that the strtoul() routine is available
1406 to provide conversion of strings to unsigned long.
1407
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1408d_strtoull (strtoull.U):
1409 This variable conditionally defines the HAS_STRTOULL symbol, which
1410 indicates to the C program that the strtoull() routine is available.
1411
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1412d_strxfrm (d_strxfrm.U):
1413 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1414 available to transform strings.
1415
1416d_suidsafe (d_dosuid.U):
1417 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1418 if setuid scripts can be secure. This test looks in /dev/fd/.
1419
1420d_symlink (d_symlink.U):
1421 This variable conditionally defines the HAS_SYMLINK symbol, which
1422 indicates to the C program that the symlink() routine is available
1423 to create symbolic links.
1424
1425d_syscall (d_syscall.U):
1426 This variable conditionally defines HAS_SYSCALL if syscall() is
1427 available call arbitrary system calls.
1428
1429d_sysconf (d_sysconf.U):
1430 This variable conditionally defines the HAS_SYSCONF symbol, which
1431 indicates to the C program that the sysconf() routine is available
1432 to determine system related limits and options.
1433
1434d_sysernlst (d_strerror.U):
1435 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1436 is available to translate error numbers to the symbolic name.
1437
1438d_syserrlst (d_strerror.U):
1439 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1440 available to translate error numbers to strings.
1441
1442d_system (d_system.U):
1443 This variable conditionally defines HAS_SYSTEM if system() is
1444 available to issue a shell command.
1445
1446d_tcgetpgrp (d_tcgtpgrp.U):
1447 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1448 indicates to the C program that the tcgetpgrp() routine is available.
1449 to get foreground process group ID.
1450
1451d_tcsetpgrp (d_tcstpgrp.U):
1452 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1453 indicates to the C program that the tcsetpgrp() routine is available
1454 to set foreground process group ID.
1455
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1456d_telldir (d_readdir.U):
1457 This variable conditionally defines HAS_TELLDIR if telldir() is
1458 available.
1459
1460d_telldirproto (d_telldirproto.U):
1461 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1462 which indicates to the C program that the system provides
1463 a prototype for the telldir() function. Otherwise, it is
1464 up to the program to supply one.
1465
1466d_time (d_time.U):
1467 This variable conditionally defines the HAS_TIME symbol, which indicates
1468 that the time() routine exists. The time() routine is normaly
1469 provided on UNIX systems.
1470
1471d_times (d_times.U):
1472 This variable conditionally defines the HAS_TIMES symbol, which indicates
1473 that the times() routine exists. The times() routine is normaly
1474 provided on UNIX systems. You may have to include <sys/times.h>.
1475
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1476d_truncate (d_truncate.U):
1477 This variable conditionally defines HAS_TRUNCATE if truncate() is
1478 available to truncate files.
1479
1480d_tzname (d_tzname.U):
1481 This variable conditionally defines HAS_TZNAME if tzname[] is
1482 available to access timezone names.
1483
1484d_umask (d_umask.U):
1485 This variable conditionally defines the HAS_UMASK symbol, which
1486 indicates to the C program that the umask() routine is available.
1487 to set and get the value of the file creation mask.
1488
1489d_uname (d_gethname.U):
1490 This variable conditionally defines the HAS_UNAME symbol, which
1491 indicates to the C program that the uname() routine may be
1492 used to derive the host name.
1493
1494d_union_semun (d_union_semun.U):
1495 This variable conditionally defines HAS_UNION_SEMUN if the
1496 union semun is defined by including <sys/sem.h>.
1497
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1498d_ustat (d_ustat.U):
1499 This variable conditionally defines HAS_USTAT if ustat() is
1500 available to query file system statistics by dev_t.
1501
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1502d_vendorbin (vendorbin.U):
1503 This variable conditionally defines PERL_VENDORBIN.
1504
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1505d_vendorlib (vendorlib.U):
1506 This variable conditionally defines PERL_VENDORLIB.
1507
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1508d_vfork (d_vfork.U):
1509 This variable conditionally defines the HAS_VFORK symbol, which
1510 indicates the vfork() routine is available.
1511
1512d_void_closedir (d_closedir.U):
1513 This variable conditionally defines VOID_CLOSEDIR if closedir()
1514 does not return a value.
1515
1516d_voidsig (d_voidsig.U):
1517 This variable conditionally defines VOIDSIG if this system
1518 declares "void (*signal(...))()" in signal.h. The old way was to
1519 declare it as "int (*signal(...))()".
1520
1521d_voidtty (i_sysioctl.U):
1522 This variable conditionally defines USE_IOCNOTTY to indicate that the
1523 ioctl() call with TIOCNOTTY should be used to void tty association.
1524 Otherwise (on USG probably), it is enough to close the standard file
1525 decriptors and do a setpgrp().
1526
1527d_volatile (d_volatile.U):
1528 This variable conditionally defines the HASVOLATILE symbol, which
1529 indicates to the C program that this C compiler knows about the
1530 volatile declaration.
1531
1532d_vprintf (d_vprintf.U):
1533 This variable conditionally defines the HAS_VPRINTF symbol, which
1534 indicates to the C program that the vprintf() routine is available
1535 to printf with a pointer to an argument list.
1536
1537d_wait4 (d_wait4.U):
1538 This variable conditionally defines the HAS_WAIT4 symbol, which
1539 indicates the wait4() routine is available.
1540
1541d_waitpid (d_waitpid.U):
1542 This variable conditionally defines HAS_WAITPID if waitpid() is
1543 available to wait for child process.
1544
1545d_wcstombs (d_wcstombs.U):
1546 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1547 indicates to the C program that the wcstombs() routine is available
1548 to convert wide character strings to multibyte strings.
1549
1550d_wctomb (d_wctomb.U):
1551 This variable conditionally defines the HAS_WCTOMB symbol, which
1552 indicates to the C program that the wctomb() routine is available
1553 to convert a wide character to a multibyte.
1554
1555d_writev (d_writev.U):
1556 This variable conditionally defines the HAS_WRITEV symbol, which
1557 indicates to the C program that the writev() routine is available.
1558
1559d_xenix (Guess.U):
1560 This variable conditionally defines the symbol XENIX, which alerts
1561 the C program that it runs under Xenix.
1562
1563date (Loc.U):
5bf26616 1564 This variable is used internally by Configure to determine the
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1565 full pathname (if any) of the date program. After Configure runs,
1566 the value is reset to a plain "date" and is not useful.
1567
1568db_hashtype (i_db.U):
1569 This variable contains the type of the hash structure element
1570 in the <db.h> header file. In older versions of DB, it was
1571 int, while in newer ones it is u_int32_t.
1572
1573db_prefixtype (i_db.U):
1574 This variable contains the type of the prefix structure element
1575 in the <db.h> header file. In older versions of DB, it was
1576 int, while in newer ones it is size_t.
1577
1578defvoidused (voidflags.U):
1579 This variable contains the default value of the VOIDUSED symbol (15).
1580
1581direntrytype (i_dirent.U):
1582 This symbol is set to 'struct direct' or 'struct dirent' depending on
1583 whether dirent is available or not. You should use this pseudo type to
1584 portably declare your directory entries.
1585
1586dlext (dlext.U):
1587 This variable contains the extension that is to be used for the
1588 dynamically loaded modules that perl generaties.
1589
1590dlsrc (dlsrc.U):
1591 This variable contains the name of the dynamic loading file that
1592 will be used with the package.
1593
1594doublesize (doublesize.U):
1595 This variable contains the value of the DOUBLESIZE symbol, which
1596 indicates to the C program how many bytes there are in a double.
1597
1598drand01 (randfunc.U):
1599 Indicates the macro to be used to generate normalized
1600 random numbers. Uses randfunc, often divided by
1601 (double) (((unsigned long) 1 << randbits)) in order to
1602 normalize the result.
1603 In C programs, the macro 'Drand01' is mapped to drand01.
1604
1605dynamic_ext (Extensions.U):
1606 This variable holds a list of XS extension files we want to
1607 link dynamically into the package. It is used by Makefile.
1608
1609eagain (nblock_io.U):
1610 This variable bears the symbolic errno code set by read() when no
1611 data is present on the file and non-blocking I/O was enabled (otherwise,
1612 read() blocks naturally).
1613
1614ebcdic (ebcdic.U):
1615 This variable conditionally defines EBCDIC if this
1616 system uses EBCDIC encoding. Among other things, this
1617 means that the character ranges are not contiguous.
1618 See trnl.U
1619
1620echo (Loc.U):
5bf26616 1621 This variable is used internally by Configure to determine the
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1622 full pathname (if any) of the echo program. After Configure runs,
1623 the value is reset to a plain "echo" and is not useful.
1624
1625egrep (Loc.U):
5bf26616 1626 This variable is used internally by Configure to determine the
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1627 full pathname (if any) of the egrep program. After Configure runs,
1628 the value is reset to a plain "egrep" and is not useful.
1629
1630emacs (Loc.U):
1631 This variable is defined but not used by Configure.
1632 The value is a plain '' and is not useful.
1633
1634eunicefix (Init.U):
1635 When running under Eunice this variable contains a command which will
1636 convert a shell script to the proper form of text file for it to be
1637 executable by the shell. On other systems it is a no-op.
1638
1639exe_ext (Unix.U):
1640 This is an old synonym for _exe.
1641
1642expr (Loc.U):
5bf26616 1643 This variable is used internally by Configure to determine the
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1644 full pathname (if any) of the expr program. After Configure runs,
1645 the value is reset to a plain "expr" and is not useful.
1646
1647extensions (Extensions.U):
1648 This variable holds a list of all extension files (both XS and
1649 non-xs linked into the package. It is propagated to Config.pm
1650 and is typically used to test whether a particular extesion
1651 is available.
1652
1653fflushall (fflushall.U):
1654 This symbol, if defined, tells that to flush
1655 all pending stdio output one must loop through all
1656 the stdio file handles stored in an array and fflush them.
1657 Note that if fflushNULL is defined, fflushall will not
1658 even be probed for and will be left undefined.
1659
1660fflushNULL (fflushall.U):
1661 This symbol, if defined, tells that fflush(NULL) does flush
1662 all pending stdio output.
1663
1664find (Loc.U):
1665 This variable is defined but not used by Configure.
1666 The value is a plain '' and is not useful.
1667
1668firstmakefile (Unix.U):
1669 This variable defines the first file searched by make. On unix,
1670 it is makefile (then Makefile). On case-insensitive systems,
1671 it might be something else. This is only used to deal with
1672 convoluted make depend tricks.
1673
1674flex (Loc.U):
1675 This variable is defined but not used by Configure.
1676 The value is a plain '' and is not useful.
1677
1678fpostype (fpostype.U):
1679 This variable defines Fpos_t to be something like fpost_t, long,
1680 uint, or whatever type is used to declare file positions in libc.
1681
1682freetype (mallocsrc.U):
1683 This variable contains the return type of free(). It is usually
1684 void, but occasionally int.
1685
1686full_ar (Loc_ar.U):
1687 This variable contains the full pathname to 'ar', whether or
1688 not the user has specified 'portability'. This is only used
1689 in the Makefile.SH.
1690
1691full_csh (d_csh.U):
1692 This variable contains the full pathname to 'csh', whether or
1693 not the user has specified 'portability'. This is only used
1694 in the compiled C program, and we assume that all systems which
1695 can share this executable will have the same full pathname to
1696 'csh.'
1697
1698full_sed (Loc_sed.U):
1699 This variable contains the full pathname to 'sed', whether or
1700 not the user has specified 'portability'. This is only used
1701 in the compiled C program, and we assume that all systems which
1702 can share this executable will have the same full pathname to
1703 'sed.'
1704
1705gccversion (cc.U):
1706 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1707 indicate whether the compiler is version 1 or 2. This is used in
1708 setting some of the default cflags. It is set to '' if not gcc.
1709
1710gidtype (gidtype.U):
1711 This variable defines Gid_t to be something like gid_t, int,
1712 ushort, or whatever type is used to declare the return type
1713 of getgid(). Typically, it is the type of group ids in the kernel.
1714
1715glibpth (libpth.U):
1716 This variable holds the general path (space-separated) used to
1717 find libraries. It may contain directories that do not exist on
1718 this platform, libpth is the cleaned-up version.
1719
1720grep (Loc.U):
5bf26616 1721 This variable is used internally by Configure to determine the
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1722 full pathname (if any) of the grep program. After Configure runs,
1723 the value is reset to a plain "grep" and is not useful.
1724
1725groupcat (nis.U):
1726 This variable contains a command that produces the text of the
1727 /etc/group file. This is normally "cat /etc/group", but can be
1728 "ypcat group" when NIS is used.
1729
1730groupstype (groupstype.U):
1731 This variable defines Groups_t to be something like gid_t, int,
1732 ushort, or whatever type is used for the second argument to
1733 getgroups() and setgroups(). Usually, this is the same as
1734 gidtype (gid_t), but sometimes it isn't.
1735
1736gzip (Loc.U):
5bf26616 1737 This variable is used internally by Configure to determine the
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1738 full pathname (if any) of the gzip program. After Configure runs,
1739 the value is reset to a plain "gzip" and is not useful.
1740
1741h_fcntl (h_fcntl.U):
1742 This is variable gets set in various places to tell i_fcntl that
1743 <fcntl.h> should be included.
1744
1745h_sysfile (h_sysfile.U):
1746 This is variable gets set in various places to tell i_sys_file that
1747 <sys/file.h> should be included.
1748
1749hint (Oldconfig.U):
1750 Gives the type of hints used for previous answers. May be one of
1751 "default", "recommended" or "previous".
1752
1753hostcat (nis.U):
1754 This variable contains a command that produces the text of the
1755 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1756 "ypcat hosts" when NIS is used.
1757
1758huge (models.U):
1759 This variable contains a flag which will tell the C compiler and loader
1760 to produce a program running with a huge memory model. If the
1761 huge model is not supported, contains the flag to produce large
1762 model programs. It is up to the Makefile to use this.
1763
1764i_arpainet (i_arpainet.U):
1765 This variable conditionally defines the I_ARPA_INET symbol,
1766 and indicates whether a C program should include <arpa/inet.h>.
1767
1768i_bsdioctl (i_sysioctl.U):
1769 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1770 indicates to the C program that <sys/bsdioctl.h> exists and should
1771 be included.
1772
1773i_db (i_db.U):
1774 This variable conditionally defines the I_DB symbol, and indicates
1775 whether a C program may include Berkeley's DB include file <db.h>.
1776
1777i_dbm (i_dbm.U):
1778 This variable conditionally defines the I_DBM symbol, which
1779 indicates to the C program that <dbm.h> exists and should
1780 be included.
1781
1782i_dirent (i_dirent.U):
1783 This variable conditionally defines I_DIRENT, which indicates
1784 to the C program that it should include <dirent.h>.
1785
1786i_dld (i_dld.U):
1787 This variable conditionally defines the I_DLD symbol, which
1788 indicates to the C program that <dld.h> (GNU dynamic loading)
1789 exists and should be included.
1790
1791i_dlfcn (i_dlfcn.U):
1792 This variable conditionally defines the I_DLFCN symbol, which
1793 indicates to the C program that <dlfcn.h> exists and should
1794 be included.
1795
1796i_fcntl (i_fcntl.U):
1797 This variable controls the value of I_FCNTL (which tells
1798 the C program to include <fcntl.h>).
1799
1800i_float (i_float.U):
1801 This variable conditionally defines the I_FLOAT symbol, and indicates
1802 whether a C program may include <float.h> to get symbols like DBL_MAX
1803 or DBL_MIN, i.e. machine dependent floating point values.
1804
1805i_gdbm (i_gdbm.U):
1806 This variable conditionally defines the I_GDBM symbol, which
1807 indicates to the C program that <gdbm.h> exists and should
1808 be included.
1809
1810i_grp (i_grp.U):
1811 This variable conditionally defines the I_GRP symbol, and indicates
1812 whether a C program should include <grp.h>.
1813
1814i_inttypes (i_inttypes.U):
1815 This variable conditionally defines the I_INTTYPES symbol,
1816 and indicates whether a C program should include <inttypes.h>.
1817
1818i_limits (i_limits.U):
1819 This variable conditionally defines the I_LIMITS symbol, and indicates
1820 whether a C program may include <limits.h> to get symbols like WORD_BIT
1821 and friends.
1822
1823i_locale (i_locale.U):
1824 This variable conditionally defines the I_LOCALE symbol,
1825 and indicates whether a C program should include <locale.h>.
1826
1827i_machcthr (i_machcthr.U):
1828 This variable conditionally defines the I_MACH_CTHREADS symbol,
1829 and indicates whether a C program should include <mach/cthreads.h>.
1830
1831i_malloc (i_malloc.U):
1832 This variable conditionally defines the I_MALLOC symbol, and indicates
1833 whether a C program should include <malloc.h>.
1834
1835i_math (i_math.U):
1836 This variable conditionally defines the I_MATH symbol, and indicates
1837 whether a C program may include <math.h>.
1838
1839i_memory (i_memory.U):
1840 This variable conditionally defines the I_MEMORY symbol, and indicates
1841 whether a C program should include <memory.h>.
1842
1843i_mntent (i_mntent.U):
1844 This variable conditionally defines the I_MNTENT symbol, and indicates
1845 whether a C program should include <mntent.h>.
1846
1847i_ndbm (i_ndbm.U):
1848 This variable conditionally defines the I_NDBM symbol, which
1849 indicates to the C program that <ndbm.h> exists and should
1850 be included.
1851
1852i_netdb (i_netdb.U):
1853 This variable conditionally defines the I_NETDB symbol, and indicates
1854 whether a C program should include <netdb.h>.
1855
1856i_neterrno (i_neterrno.U):
1857 This variable conditionally defines the I_NET_ERRNO symbol, which
1858 indicates to the C program that <net/errno.h> exists and should
1859 be included.
1860
1861i_netinettcp (i_netinettcp.U):
1862 This variable conditionally defines the I_NETINET_TCP symbol,
1863 and indicates whether a C program should include <netinet/tcp.h>.
1864
1865i_niin (i_niin.U):
1866 This variable conditionally defines I_NETINET_IN, which indicates
1867 to the C program that it should include <netinet/in.h>. Otherwise,
1868 you may try <sys/in.h>.
1869
1870i_poll (i_poll.U):
1871 This variable conditionally defines the I_POLL symbol, and indicates
1872 whether a C program should include <poll.h>.
1873
1874i_pthread (i_pthread.U):
190b66db 1875 This variable conditionally defines the I_PTHREAD symbol,
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1876 and indicates whether a C program should include <pthread.h>.
1877
1878i_pwd (i_pwd.U):
1879 This variable conditionally defines I_PWD, which indicates
1880 to the C program that it should include <pwd.h>.
1881
1882i_rpcsvcdbm (i_dbm.U):
1883 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1884 indicates to the C program that <rpcsvc/dbm.h> exists and should
1885 be included. Some System V systems might need this instead of <dbm.h>.
1886
1887i_sfio (i_sfio.U):
1888 This variable conditionally defines the I_SFIO symbol,
1889 and indicates whether a C program should include <sfio.h>.
1890
1891i_sgtty (i_termio.U):
1892 This variable conditionally defines the I_SGTTY symbol, which
1893 indicates to the C program that it should include <sgtty.h> rather
1894 than <termio.h>.
1895
1896i_shadow (i_shadow.U):
1897 This variable conditionally defines the I_SHADOW symbol, and indicates
1898 whether a C program should include <shadow.h>.
1899
1900i_socks (i_socks.U):
1901 This variable conditionally defines the I_SOCKS symbol, and indicates
1902 whether a C program should include <socks.h>.
1903
1904i_stdarg (i_varhdr.U):
1905 This variable conditionally defines the I_STDARG symbol, which
1906 indicates to the C program that <stdarg.h> exists and should
1907 be included.
1908
1909i_stddef (i_stddef.U):
1910 This variable conditionally defines the I_STDDEF symbol, which
1911 indicates to the C program that <stddef.h> exists and should
1912 be included.
1913
1914i_stdlib (i_stdlib.U):
1915 This variable conditionally defines the I_STDLIB symbol, which
1916 indicates to the C program that <stdlib.h> exists and should
1917 be included.
1918
1919i_string (i_string.U):
1920 This variable conditionally defines the I_STRING symbol, which
1921 indicates that <string.h> should be included rather than <strings.h>.
1922
1923i_sysaccess (i_sysaccess.U):
1924 This variable conditionally defines the I_SYS_ACCESS symbol,
1925 and indicates whether a C program should include <sys/access.h>.
1926
1927i_sysdir (i_sysdir.U):
1928 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1929 whether a C program should include <sys/dir.h>.
1930
1931i_sysfile (i_sysfile.U):
1932 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1933 whether a C program should include <sys/file.h> to get R_OK and friends.
1934
1935i_sysfilio (i_sysioctl.U):
1936 This variable conditionally defines the I_SYS_FILIO symbol, which
1937 indicates to the C program that <sys/filio.h> exists and should
1938 be included in preference to <sys/ioctl.h>.
1939
1940i_sysin (i_niin.U):
1941 This variable conditionally defines I_SYS_IN, which indicates
1942 to the C program that it should include <sys/in.h> instead of
1943 <netinet/in.h>.
1944
1945i_sysioctl (i_sysioctl.U):
1946 This variable conditionally defines the I_SYS_IOCTL symbol, which
1947 indicates to the C program that <sys/ioctl.h> exists and should
1948 be included.
1949
1950i_sysmman (i_sysmman.U):
1951 This variable conditionally defines the I_SYS_MMAN symbol, and
1952 indicates whether a C program should include <sys/mman.h>.
1953
1954i_sysmount (i_sysmount.U):
1955 This variable conditionally defines the I_SYSMOUNT symbol,
1956 and indicates whether a C program should include <sys/mount.h>.
1957
1958i_sysndir (i_sysndir.U):
1959 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1960 whether a C program should include <sys/ndir.h>.
1961
1962i_sysparam (i_sysparam.U):
1963 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1964 whether a C program should include <sys/param.h>.
1965
1966i_sysresrc (i_sysresrc.U):
1967 This variable conditionally defines the I_SYS_RESOURCE symbol,
1968 and indicates whether a C program should include <sys/resource.h>.
1969
1970i_syssecrt (i_syssecrt.U):
1971 This variable conditionally defines the I_SYS_SECURITY symbol,
1972 and indicates whether a C program should include <sys/security.h>.
1973
1974i_sysselct (i_sysselct.U):
1975 This variable conditionally defines I_SYS_SELECT, which indicates
1976 to the C program that it should include <sys/select.h> in order to
1977 get the definition of struct timeval.
1978
1979i_syssockio (i_sysioctl.U):
1980 This variable conditionally defines I_SYS_SOCKIO to indicate to the
1981 C program that socket ioctl codes may be found in <sys/sockio.h>
1982 instead of <sys/ioctl.h>.
1983
1984i_sysstat (i_sysstat.U):
1985 This variable conditionally defines the I_SYS_STAT symbol,
1986 and indicates whether a C program should include <sys/stat.h>.
1987
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1988i_sysstatfs (i_sysstatfs.U):
1989 This variable conditionally defines the I_SYSSTATFS symbol,
1990 and indicates whether a C program should include <sys/statfs.h>.
1991
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1992i_sysstatvfs (i_sysstatvfs.U):
1993 This variable conditionally defines the I_SYSSTATVFS symbol,
1994 and indicates whether a C program should include <sys/statvfs.h>.
1995
1996i_systime (i_time.U):
1997 This variable conditionally defines I_SYS_TIME, which indicates
1998 to the C program that it should include <sys/time.h>.
1999
2000i_systimek (i_time.U):
2001 This variable conditionally defines I_SYS_TIME_KERNEL, which
2002 indicates to the C program that it should include <sys/time.h>
2003 with KERNEL defined.
2004
2005i_systimes (i_systimes.U):
2006 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2007 whether a C program should include <sys/times.h>.
2008
2009i_systypes (i_systypes.U):
2010 This variable conditionally defines the I_SYS_TYPES symbol,
2011 and indicates whether a C program should include <sys/types.h>.
2012
2013i_sysuio (i_sysuio.U):
2014 This variable conditionally defines the I_SYSUIO symbol, and indicates
2015 whether a C program should include <sys/uio.h>.
2016
2017i_sysun (i_sysun.U):
2018 This variable conditionally defines I_SYS_UN, which indicates
2019 to the C program that it should include <sys/un.h> to get UNIX
2020 domain socket definitions.
2021
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2022i_sysvfs (i_sysvfs.U):
2023 This variable conditionally defines the I_SYSVFS symbol,
2024 and indicates whether a C program should include <sys/vfs.h>.
2025
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2026i_syswait (i_syswait.U):
2027 This variable conditionally defines I_SYS_WAIT, which indicates
2028 to the C program that it should include <sys/wait.h>.
2029
2030i_termio (i_termio.U):
2031 This variable conditionally defines the I_TERMIO symbol, which
2032 indicates to the C program that it should include <termio.h> rather
2033 than <sgtty.h>.
2034
2035i_termios (i_termio.U):
2036 This variable conditionally defines the I_TERMIOS symbol, which
2037 indicates to the C program that the POSIX <termios.h> file is
2038 to be included.
2039
2040i_time (i_time.U):
2041 This variable conditionally defines I_TIME, which indicates
2042 to the C program that it should include <time.h>.
2043
2044i_unistd (i_unistd.U):
2045 This variable conditionally defines the I_UNISTD symbol, and indicates
2046 whether a C program should include <unistd.h>.
2047
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2048i_ustat (i_ustat.U):
2049 This variable conditionally defines the I_USTAT symbol, and indicates
2050 whether a C program should include <ustat.h>.
2051
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2052i_utime (i_utime.U):
2053 This variable conditionally defines the I_UTIME symbol, and indicates
2054 whether a C program should include <utime.h>.
2055
2056i_values (i_values.U):
2057 This variable conditionally defines the I_VALUES symbol, and indicates
2058 whether a C program may include <values.h> to get symbols like MAXLONG
2059 and friends.
2060
2061i_varargs (i_varhdr.U):
2062 This variable conditionally defines I_VARARGS, which indicates
2063 to the C program that it should include <varargs.h>.
2064
2065i_varhdr (i_varhdr.U):
2066 Contains the name of the header to be included to get va_dcl definition.
2067 Typically one of varargs.h or stdarg.h.
2068
2069i_vfork (i_vfork.U):
2070 This variable conditionally defines the I_VFORK symbol, and indicates
2071 whether a C program should include vfork.h.
2072
2073ignore_versioned_solibs (libs.U):
2074 This variable should be non-empty if non-versioned shared
2075 libraries (libfoo.so.x.y) are to be ignored (because they
2076 cannot be linked against).
2077
2078incpath (usrinc.U):
2079 This variable must preceed the normal include path to get hte
2080 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2081 Value can be "" or "/bsd43" on mips.
2082
2083inews (Loc.U):
2084 This variable is defined but not used by Configure.
2085 The value is a plain '' and is not useful.
2086
2087installarchlib (archlib.U):
2088 This variable is really the same as archlibexp but may differ on
2089 those systems using AFS. For extra portability, only this variable
2090 should be used in makefiles.
2091
2092installbin (bin.U):
2093 This variable is the same as binexp unless AFS is running in which case
2094 the user is explicitely prompted for it. This variable should always
2095 be used in your makefiles for maximum portability.
2096
2097installman1dir (man1dir.U):
2098 This variable is really the same as man1direxp, unless you are using
2099 AFS in which case it points to the read/write location whereas
2100 man1direxp only points to the read-only access location. For extra
2101 portability, you should only use this variable within your makefiles.
2102
2103installman3dir (man3dir.U):
2104 This variable is really the same as man3direxp, unless you are using
2105 AFS in which case it points to the read/write location whereas
2106 man3direxp only points to the read-only access location. For extra
2107 portability, you should only use this variable within your makefiles.
2108
2109installprefix (installprefix.U):
2110 This variable holds the name of the directory below which
2111 "make install" will install the package. For most users, this
2112 is the same as prefix. However, it is useful for
2113 installing the software into a different (usually temporary)
2114 location after which it can be bundled up and moved somehow
2115 to the final location specified by prefix.
2116
2117installprefixexp (installprefix.U):
2118 This variable holds the full absolute path of installprefix
2119 with all ~-expansion done.
2120
2121installprivlib (privlib.U):
2122 This variable is really the same as privlibexp but may differ on
2123 those systems using AFS. For extra portability, only this variable
2124 should be used in makefiles.
2125
2126installscript (scriptdir.U):
2127 This variable is usually the same as scriptdirexp, unless you are on
2128 a system running AFS, in which case they may differ slightly. You
2129 should always use this variable within your makefiles for portability.
2130
2131installsitearch (sitearch.U):
2132 This variable is really the same as sitearchexp but may differ on
2133 those systems using AFS. For extra portability, only this variable
2134 should be used in makefiles.
2135
0617aed7
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2136installsitebin (sitebin.U):
2137 This variable is usually the same as sitebinexp, unless you are on
2138 a system running AFS, in which case they may differ slightly. You
2139 should always use this variable within your makefiles for portability.
2140
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2141installsitelib (sitelib.U):
2142 This variable is really the same as sitelibexp but may differ on
2143 those systems using AFS. For extra portability, only this variable
2144 should be used in makefiles.
2145
2146installstyle (installstyle.U):
2147 This variable describes the "style" of the perl installation.
2148 This is intended to be useful for tools that need to
2149 manipulate entire perl distributions. Perl itself doesn't use
2150 this to find its libraries -- the library directories are
2151 stored directly in Config.pm. Currently, there are only two
2152 styles: "lib" and "lib/perl5". The default library locations
2153 (e.g. privlib, sitelib) are either $prefix/lib or
2154 $prefix/lib/perl5. The former is useful if $prefix is a
2155 directory dedicated to perl (e.g. /opt/perl), while the latter
2156 is useful if $prefix is shared by many packages, e.g. if
2157 $prefix=/usr/local.
2158 This may later be extended to include other information, so
2159 be careful with pattern-matching on the results.
2160 For compatibility with perl5.005 and earlier, the default
2161 setting is based on whether or not $prefix contains the string
2162 "perl".
2163
2164installusrbinperl (instubperl.U):
2165 This variable tells whether Perl should be installed also as
2166 /usr/bin/perl in addition to
2167 $installbin/perl
2168
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2169installvendorbin (vendorbin.U):
2170 This variable is really the same as vendorbinexp but may differ on
2171 those systems using AFS. For extra portability, only this variable
2172 should be used in makefiles.
2173
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2174installvendorlib (vendorlib.U):
2175 This variable is really the same as vendorlibexp but may differ on
2176 those systems using AFS. For extra portability, only this variable
2177 should be used in makefiles.
2178
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2179intsize (intsize.U):
2180 This variable contains the value of the INTSIZE symbol, which
2181 indicates to the C program how many bytes there are in an int.
2182
2183known_extensions (Extensions.U):
2184 This variable holds a list of all XS extensions included in
2185 the package.
2186
2187ksh (Loc.U):
2188 This variable is defined but not used by Configure.
2189 The value is a plain '' and is not useful.
2190
2191large (models.U):
2192 This variable contains a flag which will tell the C compiler and loader
2193 to produce a program running with a large memory model. It is up to
2194 the Makefile to use this.
2195
2196ld (dlsrc.U):
2197 This variable indicates the program to be used to link
2198 libraries for dynamic loading. On some systems, it is 'ld'.
2199 On ELF systems, it should be $cc. Mostly, we'll try to respect
2200 the hint file setting.
2201
2202lddlflags (dlsrc.U):
2203 This variable contains any special flags that might need to be
2204 passed to $ld to create a shared library suitable for dynamic
2205 loading. It is up to the makefile to use it. For hpux, it
2206 should be '-b'. For sunos 4.1, it is empty.
2207
2208ldflags (ccflags.U):
2209 This variable contains any additional C loader flags desired by
2210 the user. It is up to the Makefile to use this.
2211
2212ldlibpthname (libperl.U):
2213 This variable holds the name of the shared library
2214 search path, often LD_LIBRARY_PATH. To get an empty
2215 string, the hints file must set this to 'none'.
2216
2217less (Loc.U):
5bf26616 2218 This variable is used internally by Configure to determine the
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2219 full pathname (if any) of the less program. After Configure runs,
2220 the value is reset to a plain "less" and is not useful.
2221
2222lib_ext (Unix.U):
2223 This is an old synonym for _a.
2224
2225libc (libc.U):
2226 This variable contains the location of the C library.
2227
2228libperl (libperl.U):
2229 The perl executable is obtained by linking perlmain.c with
2230 libperl, any static extensions (usually just DynaLoader),
2231 and any other libraries needed on this system. libperl
2232 is usually libperl.a, but can also be libperl.so.xxx if
2233 the user wishes to build a perl executable with a shared
2234 library.
2235
2236libpth (libpth.U):
2237 This variable holds the general path (space-separated) used to find
2238 libraries. It is intended to be used by other units.
2239
2240libs (libs.U):
2241 This variable holds the additional libraries we want to use.
2242 It is up to the Makefile to deal with it.
2243
2244libswanted (Myinit.U):
2245 This variable holds a list of all the libraries we want to
2246 search. The order is chosen to pick up the c library
2247 ahead of ucb or bsd libraries for SVR4.
2248
2249line (Loc.U):
2250 This variable is defined but not used by Configure.
2251 The value is a plain '' and is not useful.
2252
2253lint (Loc.U):
2254 This variable is defined but not used by Configure.
2255 The value is a plain '' and is not useful.
2256
2257lkflags (ccflags.U):
2258 This variable contains any additional C partial linker flags desired by
2259 the user. It is up to the Makefile to use this.
2260
2261ln (Loc.U):
5bf26616 2262 This variable is used internally by Configure to determine the
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2263 full pathname (if any) of the ln program. After Configure runs,
2264 the value is reset to a plain "ln" and is not useful.
2265
2266lns (lns.U):
2267 This variable holds the name of the command to make
2268 symbolic links (if they are supported). It can be used
2269 in the Makefile. It is either 'ln -s' or 'ln'
2270
2271locincpth (ccflags.U):
2272 This variable contains a list of additional directories to be
2273 searched by the compiler. The appropriate '-I' directives will
2274 be added to ccflags. This is intended to simplify setting
2275 local directories from the Configure command line.
2276 It's not much, but it parallels the loclibpth stuff in libpth.U.
2277
2278loclibpth (libpth.U):
2279 This variable holds the paths (space-separated) used to find local
2280 libraries. It is prepended to libpth, and is intended to be easily
2281 set from the command line.
2282
2283longdblsize (d_longdbl.U):
2284 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2285 indicates to the C program how many bytes there are in a long double,
2286 if this system supports long doubles.
2287
2288longlongsize (d_longlong.U):
2289 This variable contains the value of the LONGLONGSIZE symbol, which
2290 indicates to the C program how many bytes there are in a long long,
2291 if this system supports long long.
2292
2293longsize (intsize.U):
2294 This variable contains the value of the LONGSIZE symbol, which
2295 indicates to the C program how many bytes there are in a long.
2296
2297lp (Loc.U):
2298 This variable is defined but not used by Configure.
2299 The value is a plain '' and is not useful.
2300
2301lpr (Loc.U):
2302 This variable is defined but not used by Configure.
2303 The value is a plain '' and is not useful.
2304
2305ls (Loc.U):
5bf26616 2306 This variable is used internally by Configure to determine the
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2307 full pathname (if any) of the ls program. After Configure runs,
2308 the value is reset to a plain "ls" and is not useful.
2309
2310lseeksize (lseektype.U):
2311 This variable defines lseektype to be something like off_t, long,
2312 or whatever type is used to declare lseek offset's type in the
2313 kernel (which also appears to be lseek's return type).
2314
2315lseektype (lseektype.U):
2316 This variable defines lseektype to be something like off_t, long,
2317 or whatever type is used to declare lseek offset's type in the
2318 kernel (which also appears to be lseek's return type).
2319
2320mail (Loc.U):
2321 This variable is defined but not used by Configure.
2322 The value is a plain '' and is not useful.
2323
2324mailx (Loc.U):
2325 This variable is defined but not used by Configure.
2326 The value is a plain '' and is not useful.
2327
2328make (Loc.U):
5bf26616 2329 This variable is used internally by Configure to determine the
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2330 full pathname (if any) of the make program. After Configure runs,
2331 the value is reset to a plain "make" and is not useful.
2332
2333make_set_make (make.U):
2334 Some versions of 'make' set the variable MAKE. Others do not.
2335 This variable contains the string to be included in Makefile.SH
2336 so that MAKE is set if needed, and not if not needed.
2337 Possible values are:
2338 make_set_make='#' # If your make program handles this for you,
2339 make_set_make="MAKE=$make" # if it doesn't.
2340 I used a comment character so that we can distinguish a
2341 'set' value (from a previous config.sh or Configure '-D' option)
2342 from an uncomputed value.
2343
2344mallocobj (mallocsrc.U):
2345 This variable contains the name of the malloc.o that this package
2346 generates, if that malloc.o is preferred over the system malloc.
2347 Otherwise the value is null. This variable is intended for generating
2348 Makefiles. See mallocsrc.
2349
2350mallocsrc (mallocsrc.U):
2351 This variable contains the name of the malloc.c that comes with
2352 the package, if that malloc.c is preferred over the system malloc.
2353 Otherwise the value is null. This variable is intended for generating
2354 Makefiles.
2355
2356malloctype (mallocsrc.U):
2357 This variable contains the kind of ptr returned by malloc and realloc.
2358
2359man1dir (man1dir.U):
2360 This variable contains the name of the directory in which manual
2361 source pages are to be put. It is the responsibility of the
2362 Makefile.SH to get the value of this into the proper command.
2363 You must be prepared to do the ~name expansion yourself.
2364
2365man1direxp (man1dir.U):
2366 This variable is the same as the man1dir variable, but is filename
2367 expanded at configuration time, for convenient use in makefiles.
2368
2369man1ext (man1dir.U):
2370 This variable contains the extension that the manual page should
2371 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2372 See man1dir.
2373
2374man3dir (man3dir.U):
2375 This variable contains the name of the directory in which manual
2376 source pages are to be put. It is the responsibility of the
2377 Makefile.SH to get the value of this into the proper command.
2378 You must be prepared to do the ~name expansion yourself.
2379
2380man3direxp (man3dir.U):
2381 This variable is the same as the man3dir variable, but is filename
2382 expanded at configuration time, for convenient use in makefiles.
2383
2384man3ext (man3dir.U):
2385 This variable contains the extension that the manual page should
2386 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2387 See man3dir.
2388
2389Mcc (Loc.U):
5bf26616 2390 This variable is used internally by Configure to determine the
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2391 full pathname (if any) of the Mcc program. After Configure runs,
2392 the value is reset to a plain "Mcc" and is not useful.
2393
2394medium (models.U):
2395 This variable contains a flag which will tell the C compiler and loader
2396 to produce a program running with a medium memory model. If the
2397 medium model is not supported, contains the flag to produce large
2398 model programs. It is up to the Makefile to use this.
2399
2400mips_type (usrinc.U):
2401 This variable holds the environment type for the mips system.
2402 Possible values are "BSD 4.3" and "System V".
2403
2404mkdir (Loc.U):
5bf26616 2405 This variable is used internally by Configure to determine the
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2406 full pathname (if any) of the mkdir program. After Configure runs,
2407 the value is reset to a plain "mkdir" and is not useful.
2408
2409mmaptype (d_mmap.U):
2410 This symbol contains the type of pointer returned by mmap()
2411 (and simultaneously the type of the first argument).
2412 It can be 'void *' or 'caddr_t'.
2413
2414models (models.U):
2415 This variable contains the list of memory models supported by this
2416 system. Possible component values are none, split, unsplit, small,
2417 medium, large, and huge. The component values are space separated.
2418
2419modetype (modetype.U):
2420 This variable defines modetype to be something like mode_t,
2421 int, unsigned short, or whatever type is used to declare file
2422 modes for system calls.
2423
2424more (Loc.U):
5bf26616 2425 This variable is used internally by Configure to determine the
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2426 full pathname (if any) of the more program. After Configure runs,
2427 the value is reset to a plain "more" and is not useful.
2428
2429multiarch (multiarch.U):
2430 This variable conditionally defines the MULTIARCH symbol
2431 which signifies the presence of multiplatform files.
2432 This is normally set by hints files.
2433
2434mv (Loc.U):
2435 This variable is defined but not used by Configure.
2436 The value is a plain '' and is not useful.
2437
2438myarchname (archname.U):
2439 This variable holds the architecture name computed by Configure in
2440 a previous run. It is not intended to be perused by any user and
2441 should never be set in a hint file.
2442
2443mydomain (myhostname.U):
2444 This variable contains the eventual value of the MYDOMAIN symbol,
2445 which is the domain of the host the program is going to run on.
2446 The domain must be appended to myhostname to form a complete host name.
2447 The dot comes with mydomain, and need not be supplied by the program.
2448
2449myhostname (myhostname.U):
2450 This variable contains the eventual value of the MYHOSTNAME symbol,
2451 which is the name of the host the program is going to run on.
2452 The domain is not kept with hostname, but must be gotten from mydomain.
2453 The dot comes with mydomain, and need not be supplied by the program.
2454
2455myuname (Oldconfig.U):
2456 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2457 pseudo variables assignments in the output are stripped, thank you. The
2458 whole thing is then lower-cased.
2459
2460n (n.U):
2461 This variable contains the '-n' flag if that is what causes the echo
2462 command to suppress newline. Otherwise it is null. Correct usage is
2463 $echo $n "prompt for a question: $c".
2464
2465netdb_hlen_type (netdbtype.U):
2466 This variable holds the type used for the 2nd argument to
2467 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2468 This is only useful if you have gethostbyaddr(), naturally.
2469
2470netdb_host_type (netdbtype.U):
2471 This variable holds the type used for the 1st argument to
2472 gethostbyaddr(). Usually, this is char * or void *, possibly
2473 with or without a const prefix.
2474 This is only useful if you have gethostbyaddr(), naturally.
2475
2476netdb_name_type (netdbtype.U):
2477 This variable holds the type used for the argument to
2478 gethostbyname(). Usually, this is char * or const char *.
2479 This is only useful if you have gethostbyname(), naturally.
2480
2481netdb_net_type (netdbtype.U):
2482 This variable holds the type used for the 1st argument to
2483 getnetbyaddr(). Usually, this is int or long.
2484 This is only useful if you have getnetbyaddr(), naturally.
2485
2486nm (Loc.U):
5bf26616 2487 This variable is used internally by Configure to determine the
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2488 full pathname (if any) of the nm program. After Configure runs,
2489 the value is reset to a plain "nm" and is not useful.
2490
2491nm_opt (usenm.U):
2492 This variable holds the options that may be necessary for nm.
2493
2494nm_so_opt (usenm.U):
2495 This variable holds the options that may be necessary for nm
2496 to work on a shared library but that can not be used on an
2497 archive library. Currently, this is only used by Linux, where
2498 nm --dynamic is *required* to get symbols from an ELF library which
2499 has been stripped, but nm --dynamic is *fatal* on an archive library.
2500 Maybe Linux should just always set usenm=false.
2501
2502nonxs_ext (Extensions.U):
2503 This variable holds a list of all non-xs extensions included
2504 in the package. All of them will be built.
2505
2506nroff (Loc.U):
5bf26616 2507 This variable is used internally by Configure to determine the
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2508 full pathname (if any) of the nroff program. After Configure runs,
2509 the value is reset to a plain "nroff" and is not useful.
2510
2511o_nonblock (nblock_io.U):
2512 This variable bears the symbol value to be used during open() or fcntl()
2513 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2514 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2515 but that is only supported by some devices.
2516
2517obj_ext (Unix.U):
2518 This is an old synonym for _o.
2519
2520old_pthread_create_joinable (d_pthrattrj.U):
2521 This variable defines the constant to use for creating joinable
2522 (aka undetached) pthreads. Unused if pthread.h defines
2523 PTHREAD_CREATE_JOINABLE. If used, possible values are
2524 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2525
2526optimize (ccflags.U):
2527 This variable contains any optimizer/debugger flag that should be used.
2528 It is up to the Makefile to use it.
2529
2530orderlib (orderlib.U):
2531 This variable is "true" if the components of libraries must be ordered
2532 (with `lorder $* | tsort`) before placing them in an archive. Set to
2533 "false" if ranlib or ar can generate random libraries.
2534
2535osname (Oldconfig.U):
2536 This variable contains the operating system name (e.g. sunos,
2537 solaris, hpux, etc.). It can be useful later on for setting
2538 defaults. Any spaces are replaced with underscores. It is set
2539 to a null string if we can't figure it out.
2540
2541osvers (Oldconfig.U):
2542 This variable contains the operating system version (e.g.
2543 4.1.3, 5.2, etc.). It is primarily used for helping select
2544 an appropriate hints file, but might be useful elsewhere for
2545 setting defaults. It is set to '' if we can't figure it out.
2546 We try to be flexible about how much of the version number
2547 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2548 same for this package, hints files might just be os_4.0 or
2549 os_4.1, etc., not keeping separate files for each little release.
2550
2551package (package.U):
2552 This variable contains the name of the package being constructed.
2553 It is primarily intended for the use of later Configure units.
2554
2555pager (pager.U):
2556 This variable contains the name of the preferred pager on the system.
2557 Usual values are (the full pathnames of) more, less, pg, or cat.
2558
2559passcat (nis.U):
2560 This variable contains a command that produces the text of the
2561 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2562 "ypcat passwd" when NIS is used.
2563
2564patchlevel (patchlevel.U):
2565 The patchlevel level of this package.
2566 The value of patchlevel comes from the patchlevel.h file.
2567
2568path_sep (Unix.U):
2569 This is an old synonym for p_ in Head.U, the character
2570 used to separate elements in the command shell search PATH.
2571
2572perl (Loc.U):
2573 This variable is defined but not used by Configure.
2574 The value is a plain '' and is not useful.
2575
2576perladmin (perladmin.U):
2577 Electronic mail address of the perl5 administrator.
2578
2579perlpath (perlpath.U):
2580 This variable contains the eventual value of the PERLPATH symbol,
2581 which contains the name of the perl interpreter to be used in
2582 shell scripts and in the "eval 'exec'" idiom.
2583
2584pg (Loc.U):
5bf26616 2585 This variable is used internally by Configure to determine the
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2586 full pathname (if any) of the pg program. After Configure runs,
2587 the value is reset to a plain "pg" and is not useful.
2588
2589phostname (myhostname.U):
2590 This variable contains the eventual value of the PHOSTNAME symbol,
2591 which is a command that can be fed to popen() to get the host name.
2592 The program should probably not presume that the domain is or isn't
2593 there already.
2594
2595pidtype (pidtype.U):
2596 This variable defines PIDTYPE to be something like pid_t, int,
2597 ushort, or whatever type is used to declare process ids in the kernel.
2598
2599plibpth (libpth.U):
2600 Holds the private path used by Configure to find out the libraries.
2601 Its value is prepend to libpth. This variable takes care of special
2602 machines, like the mips. Usually, it should be empty.
2603
75347591
JH
2604pm_apiversion (xs_apiversion.U):
2605 This variable contains the version of the oldest perl
2606 compatible with the present perl. (That is, pure perl modules
2607 written for $pm_apiversion will still work for the current
2608 version). perl.c:incpush() and lib/lib.pm will automatically
2609 search in $sitelib for older directories across major versions
2610 back to pm_apiversion. This is only useful if you have a perl
2611 library directory tree structured like the default one. The
2612 versioned site_perl library was introduced in 5.005, so that's
2613 the default setting for this variable. It's hard to imagine
2614 it changing before Perl6. It is included here for symmetry
2615 with xs_apiveprsion -- the searching algorithms will
2616 (presumably) be similar.
2617 See the INSTALL file for how this works.
2618
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2619pmake (Loc.U):
2620 This variable is defined but not used by Configure.
2621 The value is a plain '' and is not useful.
2622
2623pr (Loc.U):
2624 This variable is defined but not used by Configure.
2625 The value is a plain '' and is not useful.
2626
2627prefix (prefix.U):
2628 This variable holds the name of the directory below which the
2629 user will install the package. Usually, this is /usr/local, and
2630 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2631 man pages in /usr/local/man, etc. It is only used to set defaults
2632 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2633
2634prefixexp (prefix.U):
2635 This variable holds the full absolute path of the directory below
2636 which the user will install the package. Derived from prefix.
2637
2638privlib (privlib.U):
2639 This variable contains the eventual value of the PRIVLIB symbol,
2640 which is the name of the private library for this package. It may
2641 have a ~ on the front. It is up to the makefile to eventually create
2642 this directory while performing installation (with ~ substitution).
2643
2644privlibexp (privlib.U):
2645 This variable is the ~name expanded version of privlib, so that you
2646 may use it directly in Makefiles or shell scripts.
2647
2648prototype (prototype.U):
2649 This variable holds the eventual value of CAN_PROTOTYPE, which
2650 indicates the C compiler can handle funciton prototypes.
2651
2652ptrsize (ptrsize.U):
2653 This variable contains the value of the PTRSIZE symbol, which
2654 indicates to the C program how many bytes there are in a pointer.
2655
2656randbits (randfunc.U):
2657 Indicates how many bits are produced by the function used to
2658 generate normalized random numbers.
2659
2660randfunc (randfunc.U):
2661 Indicates the name of the random number function to use.
2662 Values include drand48, random, and rand. In C programs,
2663 the 'Drand01' macro is defined to generate uniformly distributed
2664 random numbers over the range [0., 1.[ (see drand01 and nrand).
2665
2666randseedtype (randfunc.U):
2667 Indicates the type of the argument of the seedfunc.
2668
2669ranlib (orderlib.U):
2670 This variable is set to the pathname of the ranlib program, if it is
2671 needed to generate random libraries. Set to ":" if ar can generate
2672 random libraries or if random libraries are not supported
2673
2674rd_nodata (nblock_io.U):
2675 This variable holds the return code from read() when no data is
2676 present. It should be -1, but some systems return 0 when O_NDELAY is
2677 used, which is a shame because you cannot make the difference between
2678 no data and an EOF.. Sigh!
2679
2680rm (Loc.U):
5bf26616 2681 This variable is used internally by Configure to determine the
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JH
2682 full pathname (if any) of the rm program. After Configure runs,
2683 the value is reset to a plain "rm" and is not useful.
2684
2685rmail (Loc.U):
2686 This variable is defined but not used by Configure.
2687 The value is a plain '' and is not useful.
2688
2689runnm (usenm.U):
2690 This variable contains 'true' or 'false' depending whether the
2691 nm extraction should be performed or not, according to the value
2692 of usenm and the flags on the Configure command line.
2693
2694sched_yield (d_pthread_y.U):
2695 This variable defines the way to yield the execution
2696 of the current thread.
2697
2698scriptdir (scriptdir.U):
2699 This variable holds the name of the directory in which the user wants
2700 to put publicly scripts for the package in question. It is either
2701 the same directory as for binaries, or a special one that can be
2702 mounted across different architectures, like /usr/share. Programs
2703 must be prepared to deal with ~name expansion.
2704
2705scriptdirexp (scriptdir.U):
2706 This variable is the same as scriptdir, but is filename expanded
2707 at configuration time, for programs not wanting to bother with it.
2708
2709sed (Loc.U):
5bf26616 2710 This variable is used internally by Configure to determine the
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JH
2711 full pathname (if any) of the sed program. After Configure runs,
2712 the value is reset to a plain "sed" and is not useful.
2713
2714seedfunc (randfunc.U):
2715 Indicates the random number generating seed function.
2716 Values include srand48, srandom, and srand.
2717
2718selectminbits (selectminbits.U):
2719 This variable holds the minimum number of bits operated by select.
2720 That is, if you do select(n, ...), how many bits at least will be
2721 cleared in the masks if some activity is detected. Usually this
2722 is either n or 32*ceil(n/32), especially many little-endians do
2723 the latter. This is only useful if you have select(), naturally.
2724
2725selecttype (selecttype.U):
2726 This variable holds the type used for the 2nd, 3rd, and 4th
2727 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2728 is defined, and 'int *' otherwise. This is only useful if you
2729 have select(), naturally.
2730
2731sendmail (Loc.U):
2732 This variable is defined but not used by Configure.
2733 The value is a plain '' and is not useful.
2734
2735sh (sh.U):
2736 This variable contains the full pathname of the shell used
2737 on this system to execute Bourne shell scripts. Usually, this will be
2738 /bin/sh, though it's possible that some systems will have /bin/ksh,
2739 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2740 D:/bin/sh.exe.
2741 This unit comes before Options.U, so you can't set sh with a '-D'
2742 option, though you can override this (and startsh)
2743 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2744
2745shar (Loc.U):
2746 This variable is defined but not used by Configure.
2747 The value is a plain '' and is not useful.
2748
2749sharpbang (spitshell.U):
2750 This variable contains the string #! if this system supports that
2751 construct.
2752
2753shmattype (d_shmat.U):
2754 This symbol contains the type of pointer returned by shmat().
2755 It can be 'void *' or 'char *'.
2756
2757shortsize (intsize.U):
2758 This variable contains the value of the SHORTSIZE symbol which
2759 indicates to the C program how many bytes there are in a short.
2760
2761shrpenv (libperl.U):
2762 If the user builds a shared libperl.so, then we need to tell the
2763 'perl' executable where it will be able to find the installed libperl.so.
2764 One way to do this on some systems is to set the environment variable
2765 LD_RUN_PATH to the directory that will be the final location of the
2766 shared libperl.so. The makefile can use this with something like
2767 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2768 Typical values are
2769 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2770 or
2771 shrpenv=''
2772 See the main perl Makefile.SH for actual working usage.
2773 Alternatively, we might be able to use a command line option such
2774 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2775 $archlibexp/CORE (Linux).
2776
2777shsharp (spitshell.U):
2778 This variable tells further Configure units whether your sh can
2779 handle # comments.
2780
2781sig_count (sig_name.U):
2782 This variable holds a number larger than the largest valid
2783 signal number. This is usually the same as the NSIG macro.
2784
2785sig_name (sig_name.U):
2786 This variable holds the signal names, space separated. The leading
2787 SIG in signal name is removed. A ZERO is prepended to the
2788 list. This is currently not used.
2789
2790sig_name_init (sig_name.U):
2791 This variable holds the signal names, enclosed in double quotes and
2792 separated by commas, suitable for use in the SIG_NAME definition
2793 below. A "ZERO" is prepended to the list, and the list is
2794 terminated with a plain 0. The leading SIG in signal names
2795 is removed. See sig_num.
2796
2797sig_num (sig_name.U):
2798 This variable holds the signal numbers, space separated. A ZERO is
2799 prepended to the list (corresponding to the fake SIGZERO), and
2800 the list is terminated with a 0. Those numbers correspond to
2801 the value of the signal listed in the same place within the
2802 sig_name list.
2803
2804sig_num_init (sig_name.U):
2805 This variable holds the signal numbers, enclosed in double quotes and
2806 separated by commas, suitable for use in the SIG_NUM definition
2807 below. A "ZERO" is prepended to the list, and the list is
2808 terminated with a plain 0.
2809
2810signal_t (d_voidsig.U):
2811 This variable holds the type of the signal handler (void or int).
2812
2813sitearch (sitearch.U):
2814 This variable contains the eventual value of the SITEARCH symbol,
2815 which is the name of the private library for this package. It may
2816 have a ~ on the front. It is up to the makefile to eventually create
2817 this directory while performing installation (with ~ substitution).
2818
2819sitearchexp (sitearch.U):
2820 This variable is the ~name expanded version of sitearch, so that you
2821 may use it directly in Makefiles or shell scripts.
2822
0617aed7
JH
2823sitebin (sitebin.U):
2824 This variable holds the name of the directory in which the user wants
2825 to put add-on publicly executable files for the package in question. It
2826 is most often a local directory such as /usr/local/bin. Programs using
2827 this variable must be prepared to deal with ~name substitution.
2828
2829sitebinexp (sitebin.U):
2830 This is the same as the sitebin variable, but is filename expanded at
2831 configuration time, for use in your makefiles.
2832
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2833sitelib (sitelib.U):
2834 This variable contains the eventual value of the SITELIB symbol,
2835 which is the name of the private library for this package. It may
2836 have a ~ on the front. It is up to the makefile to eventually create
2837 this directory while performing installation (with ~ substitution).
2838
2839sitelibexp (sitelib.U):
2840 This variable is the ~name expanded version of sitelib, so that you
2841 may use it directly in Makefiles or shell scripts.
2842
2843siteprefix (siteprefix.U):
2844 This variable holds the full absolute path of the directory below
2845 which the user will install add-on packages.
2846
2847siteprefixexp (siteprefix.U):
2848 This variable holds the full absolute path of the directory below
2849 which the user will install add-on packages. Derived from siteprefix.
2850
2851sizetype (sizetype.U):
2852 This variable defines sizetype to be something like size_t,
2853 unsigned long, or whatever type is used to declare length
2854 parameters for string functions.
2855
2856sleep (Loc.U):
2857 This variable is defined but not used by Configure.
2858 The value is a plain '' and is not useful.
2859
2860smail (Loc.U):
2861 This variable is defined but not used by Configure.
2862 The value is a plain '' and is not useful.
2863
2864small (models.U):
2865 This variable contains a flag which will tell the C compiler and loader
2866 to produce a program running with a small memory model. It is up to
2867 the Makefile to use this.
2868
2869so (so.U):
2870 This variable holds the extension used to identify shared libraries
2871 (also known as shared objects) on the system. Usually set to 'so'.
2872
2873sockethdr (d_socket.U):
2874 This variable has any cpp '-I' flags needed for socket support.
2875
2876socketlib (d_socket.U):
2877 This variable has the names of any libraries needed for socket support.
2878
2879sort (Loc.U):
5bf26616 2880 This variable is used internally by Configure to determine the
781b178c
JH
2881 full pathname (if any) of the sort program. After Configure runs,
2882 the value is reset to a plain "sort" and is not useful.
2883
2884spackage (package.U):
2885 This variable contains the name of the package being constructed,
2886 with the first letter uppercased, i.e. suitable for starting
2887 sentences.
2888
2889spitshell (spitshell.U):
2890 This variable contains the command necessary to spit out a runnable
2891 shell on this system. It is either cat or a grep '-v' for # comments.
2892
2893split (models.U):
2894 This variable contains a flag which will tell the C compiler and loader
2895 to produce a program that will run in separate I and D space, for those
2896 machines that support separation of instruction and data space. It is
2897 up to the Makefile to use this.
2898
11dc3f68
JH
2899sPRId64 (quadfio.U):
2900 This variable, if defined, contains the string used by stdio to
2901 format 64-bit decimal numbers (format 'd') for output.
2902
2903sPRIeldbl (longdblfio.U):
2904 This variable, if defined, contains the string used by stdio to
2905 format long doubles (format 'e') for output.
2906
2907sPRIEldbl (longdblfio.U):
2908 This variable, if defined, contains the string used by stdio to
2909 format long doubles (format 'E') for output.
2910
2911sPRIfldbl (longdblfio.U):
2912 This variable, if defined, contains the string used by stdio to
2913 format long doubles (format 'f') for output.
2914
2915sPRIFldbl (longdblfio.U):
2916 This variable, if defined, contains the string used by stdio to
2917 format long doubles (format 'F') for output.
2918
2919sPRIgldbl (longdblfio.U):
2920 This variable, if defined, contains the string used by stdio to
2921 format long doubles (format 'g') for output.
2922
2923sPRIGldbl (longdblfio.U):
2924 This variable, if defined, contains the string used by stdio to
2925 format long doubles (format 'G') for output.
2926
2927sPRIi64 (quadfio.U):
2928 This variable, if defined, contains the string used by stdio to
2929 format 64-bit decimal numbers (format 'i') for output.
2930
2931sPRIo64 (quadfio.U):
2932 This variable, if defined, contains the string used by stdio to
2933 format 64-bit octal numbers (format 'o') for output.
2934
2935sPRIu64 (quadfio.U):
2936 This variable, if defined, contains the string used by stdio to
2937 format 64-bit unsigned decimal numbers (format 'u') for output.
2938
2939sPRIx64 (quadfio.U):
2940 This variable, if defined, contains the string used by stdio to
2941 format 64-bit hexadecimal numbers (format 'x') for output.
2942
2943sPRIX64 (quadfio.U):
2944 This variable, if defined, contains the string used by stdio to
2945 format 64-bit hExADECimAl numbers (format 'X') for output.
2946
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JH
2947src (src.U):
2948 This variable holds the path to the package source. It is up to
2949 the Makefile to use this variable and set VPATH accordingly to
2950 find the sources remotely.
2951
2952ssizetype (ssizetype.U):
2953 This variable defines ssizetype to be something like ssize_t,
2954 long or int. It is used by functions that return a count
2955 of bytes or an error condition. It must be a signed type.
2956 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2957
2958startperl (startperl.U):
2959 This variable contains the string to put on the front of a perl
2960 script to make sure (hopefully) that it runs with perl and not some
2961 shell. Of course, that leading line must be followed by the classical
2962 perl idiom:
2963 eval 'exec perl -S $0 ${1+"$@"}'
2964 if $running_under_some_shell;
2965 to guarantee perl startup should the shell execute the script. Note
2966 that this magic incatation is not understood by csh.
2967
2968startsh (startsh.U):
2969 This variable contains the string to put on the front of a shell
2970 script to make sure (hopefully) that it runs with sh and not some
2971 other shell.
2972
2973static_ext (Extensions.U):
2974 This variable holds a list of XS extension files we want to
2975 link statically into the package. It is used by Makefile.
2976
2977stdchar (stdchar.U):
2978 This variable conditionally defines STDCHAR to be the type of char
2979 used in stdio.h. It has the values "unsigned char" or "char".
2980
2981stdio_base (d_stdstdio.U):
2982 This variable defines how, given a FILE pointer, fp, to access the
2983 _base field (or equivalent) of stdio.h's FILE structure. This will
2984 be used to define the macro FILE_base(fp).
2985
2986stdio_bufsiz (d_stdstdio.U):
2987 This variable defines how, given a FILE pointer, fp, to determine
2988 the number of bytes store in the I/O buffer pointer to by the
2989 _base field (or equivalent) of stdio.h's FILE structure. This will
2990 be used to define the macro FILE_bufsiz(fp).
2991
2992stdio_cnt (d_stdstdio.U):
2993 This variable defines how, given a FILE pointer, fp, to access the
2994 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2995 be used to define the macro FILE_cnt(fp).
2996
2997stdio_filbuf (d_stdstdio.U):
2998 This variable defines how, given a FILE pointer, fp, to tell
2999 stdio to refill it's internal buffers (?). This will
3000 be used to define the macro FILE_filbuf(fp).
3001
3002stdio_ptr (d_stdstdio.U):
3003 This variable defines how, given a FILE pointer, fp, to access the
3004 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3005 be used to define the macro FILE_ptr(fp).
3006
3007stdio_stream_array (stdio_streams.U):
3008 This variable tells the name of the array holding the stdio streams.
3009 Usual values include _iob, __iob, and __sF.
3010
3011strings (i_string.U):
3012 This variable holds the full path of the string header that will be
3013 used. Typically /usr/include/string.h or /usr/include/strings.h.
3014
3015submit (Loc.U):
3016 This variable is defined but not used by Configure.
3017 The value is a plain '' and is not useful.
3018
3019subversion (patchlevel.U):
3020 The subversion level of this package.
3021 The value of subversion comes from the patchlevel.h file.
3022 This is unique to perl.
3023
3024sysman (sysman.U):
3025 This variable holds the place where the manual is located on this
3026 system. It is not the place where the user wants to put his manual
3027 pages. Rather it is the place where Configure may look to find manual
3028 for unix commands (section 1 of the manual usually). See mansrc.
3029
3030tail (Loc.U):
3031 This variable is defined but not used by Configure.
3032 The value is a plain '' and is not useful.
3033
3034tar (Loc.U):
3035 This variable is defined but not used by Configure.
3036 The value is a plain '' and is not useful.
3037
3038tbl (Loc.U):
3039 This variable is defined but not used by Configure.
3040 The value is a plain '' and is not useful.
3041
3042tee (Loc.U):
3043 This variable is defined but not used by Configure.
3044 The value is a plain '' and is not useful.
3045
3046test (Loc.U):
5bf26616 3047 This variable is used internally by Configure to determine the
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JH
3048 full pathname (if any) of the test program. After Configure runs,
3049 the value is reset to a plain "test" and is not useful.
3050
3051timeincl (i_time.U):
3052 This variable holds the full path of the included time header(s).
3053
3054timetype (d_time.U):
3055 This variable holds the type returned by time(). It can be long,
3056 or time_t on BSD sites (in which case <sys/types.h> should be
3057 included). Anyway, the type Time_t should be used.
3058
3059touch (Loc.U):
5bf26616 3060 This variable is used internally by Configure to determine the
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3061 full pathname (if any) of the touch program. After Configure runs,
3062 the value is reset to a plain "touch" and is not useful.
3063
3064tr (Loc.U):
5bf26616 3065 This variable is used internally by Configure to determine the
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3066 full pathname (if any) of the tr program. After Configure runs,
3067 the value is reset to a plain "tr" and is not useful.
3068
3069trnl (trnl.U):
3070 This variable contains the value to be passed to the tr(1)
3071 command to transliterate a newline. Typical values are
3072 '\012' and '\n'. This is needed for EBCDIC systems where
3073 newline is not necessarily '\012'.
3074
3075troff (Loc.U):
3076 This variable is defined but not used by Configure.
3077 The value is a plain '' and is not useful.
3078
2d228ff3
JH
3079uidsign (uidsign.U):
3080 This variable contains the signedness of a uidtype.
3081 1 for unsigned, -1 for signed.
3082
781b178c
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3083uidtype (uidtype.U):
3084 This variable defines Uid_t to be something like uid_t, int,
3085 ushort, or whatever type is used to declare user ids in the kernel.
3086
3087uname (Loc.U):
5bf26616 3088 This variable is used internally by Configure to determine the
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3089 full pathname (if any) of the uname program. After Configure runs,
3090 the value is reset to a plain "uname" and is not useful.
3091
3092uniq (Loc.U):
5bf26616 3093 This variable is used internally by Configure to determine the
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3094 full pathname (if any) of the uniq program. After Configure runs,
3095 the value is reset to a plain "uniq" and is not useful.
3096
3097use64bits (use64bits.U):
3098 This variable conditionally defines the USE_64_BITS symbol,
3099 and indicates that explicit 64-bit interfaces should be used
3100 when available.
3101
3102usedl (dlsrc.U):
3103 This variable indicates if the the system supports dynamic
3104 loading of some sort. See also dlsrc and dlobj.
3105
5bf26616 3106uselargefiles (uselfs.U):
1baac590
JH
3107 This variable conditionally defines the USE_LARGE_FILES symbol,
3108 and indicates that large file interfaces should be used when
3109 available. The use64bits symbol will also be turned on if necessary.
3110
ca24dfc6
LV
3111uselongdouble (uselongdbl.U):
3112 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3113 and indicates that long doubles should be used when available.
3114
1baac590
JH
3115usemorebits (usemorebits.U):
3116 This variable conditionally defines the USE_MORE_BITS symbol,
3117 and indicates that explicit 64-bit interfaces and long doubles
3118 should be used when available.
3119
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3120usemultiplicity (usemultiplicity.U):
3121 This variable conditionally defines the MULTIPLICITY symbol,
3122 and indicates that Perl should be built to use multiplicity.
3123
3124usemymalloc (mallocsrc.U):
3125 This variable contains y if the malloc that comes with this package
3126 is desired over the system's version of malloc. People often include
3127 special versions of malloc for effiency, but such versions are often
3128 less portable. See also mallocsrc and mallocobj.
3129 If this is 'y', then -lmalloc is removed from $libs.
3130
3131usenm (usenm.U):
3132 This variable contains 'true' or 'false' depending whether the
3133 nm extraction is wanted or not.
3134
3135useopcode (Extensions.U):
3136 This variable holds either 'true' or 'false' to indicate
3137 whether the Opcode extension should be used. The sole
3138 use for this currently is to allow an easy mechanism
3139 for users to skip the Opcode extension from the Configure
3140 command line.
3141
3142useperlio (useperlio.U):
3143 This variable conditionally defines the USE_PERLIO symbol,
3144 and indicates that the PerlIO abstraction should be
3145 used throughout.
3146
3147useposix (Extensions.U):
3148 This variable holds either 'true' or 'false' to indicate
3149 whether the POSIX extension should be used. The sole
3150 use for this currently is to allow an easy mechanism
3151 for hints files to indicate that POSIX will not compile
3152 on a particular system.
3153
3154usesfio (d_sfio.U):
3155 This variable is set to true when the user agrees to use sfio.
3156 It is set to false when sfio is not available or when the user
3157 explicitely requests not to use sfio. It is here primarily so
3158 that command-line settings can override the auto-detection of
3159 d_sfio without running into a "WHOA THERE".
3160
3161useshrplib (libperl.U):
3162 This variable is set to 'yes' if the user wishes
3163 to build a shared libperl, and 'no' otherwise.
3164
3165usesocks (usesocks.U):
3166 This variable conditionally defines the USE_SOCKS symbol,
3167 and indicates that Perl should be built to use SOCKS.
3168
3169usethreads (usethreads.U):
3170 This variable conditionally defines the USE_THREADS symbol,
3171 and indicates that Perl should be built to use threads.
3172
9f50e519
NA
3173usevendorprefix (vendorprefix.U):
3174 This variable tells whether the vendorprefix
3175 and consequently other vendor* paths are in use.
3176
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3177usevfork (d_vfork.U):
3178 This variable is set to true when the user accepts to use vfork.
3179 It is set to false when no vfork is available or when the user
3180 explicitely requests not to use vfork.
3181
3182usrinc (usrinc.U):
3183 This variable holds the path of the include files, which is
3184 usually /usr/include. It is mainly used by other Configure units.
3185
3186uuname (Loc.U):
3187 This variable is defined but not used by Configure.
3188 The value is a plain '' and is not useful.
3189
0617aed7
JH
3190vendorbin (vendorbin.U):
3191 This variable contains the eventual value of the VENDORBIN symbol,
3192 which is the name of the private directory for exuctables for this package.
3193 It may have a ~ on the front. It is up to the makefile to eventually create
3194 this directory while performing installation (with ~ substitution).
3195 Vendors who distribute perl binaries may place their own
3196 extensions and modules in this directory.
3197
3198vendorbinexp (vendorbin.U):
3199 This variable is the ~name expanded version of vendorbin, so that you
3200 may use it directly in Makefiles or shell scripts.
3201
a3635516
JH
3202vendorlib (vendorlib.U):
3203 This variable contains the eventual value of the VENDORLIB symbol,
3204 which is the name of the private library for this package. It may
3205 have a ~ on the front. It is up to the makefile to eventually create
3206 this directory while performing installation (with ~ substitution).
3207 Vendors who distribute perl binaries may place their own
3208 extensions and modules in this directory.
3209
3210vendorlibexp (vendorlib.U):
3211 This variable is the ~name expanded version of vendorlib, so that you
3212 may use it directly in Makefiles or shell scripts.
3213
3214vendorprefix (vendorprefix.U):
3215 This variable holds the full absolute path of the directory below
3216 which the vendor will install add-on packages.
3217
3218vendorprefixexp (vendorprefix.U):
3219 This variable holds the full absolute path of the directory below
3220 which the vendor will install add-on packages. Derived from vendorprefix.
3221
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3222version (patchlevel.U):
3223 The full version number of this package. This combines
3224 baserev, patchlevel, and subversion to get the full
3225 version number, including any possible subversions. Care
3226 is taken to use the C locale in order to get something
3227 like 5.004 instead of 5,004. This is unique to perl.
3228
3229vi (Loc.U):
3230 This variable is defined but not used by Configure.
3231 The value is a plain '' and is not useful.
3232
3233voidflags (voidflags.U):
3234 This variable contains the eventual value of the VOIDFLAGS symbol,
3235 which indicates how much support of the void type is given by this
3236 compiler. See VOIDFLAGS for more info.
3237
3238xlibpth (libpth.U):
3239 This variable holds extra path (space-separated) used to find
3240 libraries on this platform, for example CPU-specific libraries
3241 (on multi-CPU platforms) may be listed here.
3242
75347591
JH
3243xs_apiversion (xs_apiversion.U):
3244 This variable contains the version of the oldest perl binary
3245 compatible with the present perl. perl.c:incpush() and
3246 lib/lib.pm will automatically search in $sitearch for older
3247 directories across major versions back to xs_apiversion.
3248 This is only useful if you have a perl library directory tree
3249 structured like the default one.
3250 See INSTALL for how this works.
3251 The versioned site_perl directory was introduced in 5.005,
3252 so that is the lowest possible value.
3253 Since this can depend on compile time options (such as
3254 bincompat) it is set by Configure. Other non-default sources
3255 of potential incompatibility, such as multiplicity, threads,
3256 debugging, 64bits, sfio, etc., are not checked for currently,
3257 though in principle we could go snooping around in old
3258 Config.pm files.
3259
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3260zcat (Loc.U):
3261 This variable is defined but not used by Configure.
3262 The value is a plain '' and is not useful.
3263
3264zip (Loc.U):
5bf26616 3265 This variable is used internally by Configure to determine the
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JH
3266 full pathname (if any) of the zip program. After Configure runs,
3267 the value is reset to a plain "zip" and is not useful.
3268