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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
ebc74a4b
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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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JH
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):
41 This is a number which identifies the lowest version of perl
42 to have an API (for XS extensions) compatible with the present
43 version. For example, for 5.005_01, the apiversion should be
44 5.005, since 5.005_01 should be binary compatible with 5.005.
45 This should probably be incremented manually somehow, perhaps
46 from patchlevel.h. For now, we'll guess maintenance subversions
47 will retain binary compatibility.
48
49ar (Loc.U):
50 This variable is be used internally by Configure to determine the
51 full pathname (if any) of the ar program. After Configure runs,
52 the value is reset to a plain "ar" and is not useful.
53
54archlib (archlib.U):
55 This variable holds the name of the directory in which the user wants
56 to put architecture-dependent public library files for $package.
57 It is most often a local directory such as /usr/local/lib.
58 Programs using this variable must be prepared to deal
59 with filename expansion.
60
61archlibexp (archlib.U):
62 This variable is the same as the archlib variable, but is
63 filename expanded at configuration time, for convenient use.
64
65archname64 (use64bits.U):
66 This variable is used for the 64-bitness part of $archname.
67
68archname (archname.U):
69 This variable is a short name to characterize the current
70 architecture. It is used mainly to construct the default archlib.
71
72archobjs (Unix.U):
73 This variable defines any additional objects that must be linked
74 in with the program on this architecture. On unix, it is usually
75 empty. It is typically used to include emulations of unix calls
76 or other facilities. For perl on OS/2, for example, this would
77 include os2/os2.obj.
78
79awk (Loc.U):
80 This variable is be used internally by Configure to determine the
81 full pathname (if any) of the awk program. After Configure runs,
82 the value is reset to a plain "awk" and is not useful.
83
84baserev (baserev.U):
85 The base revision level of this package, from the .package file.
86
87bash (Loc.U):
88 This variable is defined but not used by Configure.
89 The value is a plain '' and is not useful.
90
91bin (bin.U):
92 This variable holds the name of the directory in which the user wants
93 to put publicly executable images for the package in question. It
94 is most often a local directory such as /usr/local/bin. Programs using
95 this variable must be prepared to deal with ~name substitution.
96
97binexp (bin.U):
98 This is the same as the bin variable, but is filename expanded at
99 configuration time, for use in your makefiles.
100
101bison (Loc.U):
102 This variable is defined but not used by Configure.
103 The value is a plain '' and is not useful.
104
105byacc (Loc.U):
106 This variable is be used internally by Configure to determine the
107 full pathname (if any) of the byacc program. After Configure runs,
108 the value is reset to a plain "byacc" and is not useful.
109
110byteorder (byteorder.U):
111 This variable holds the byte order. In the following, larger digits
112 indicate more significance. The variable byteorder is either 4321
113 on a big-endian machine, or 1234 on a little-endian, or 87654321
114 on a Cray ... or 3412 with weird order !
115
116c (n.U):
117 This variable contains the \c string if that is what causes the echo
118 command to suppress newline. Otherwise it is null. Correct usage is
119 $echo $n "prompt for a question: $c".
120
121castflags (d_castneg.U):
122 This variable contains a flag that precise difficulties the
123 compiler has casting odd floating values to unsigned long:
124 0 = ok
125 1 = couldn't cast < 0
126 2 = couldn't cast >= 0x80000000
127 4 = couldn't cast in argument expression list
128
129cat (Loc.U):
130 This variable is be used internally by Configure to determine the
131 full pathname (if any) of the cat program. After Configure runs,
132 the value is reset to a plain "cat" and is not useful.
133
134cc (cc.U):
135 This variable holds the name of a command to execute a C compiler which
136 can resolve multiple global references that happen to have the same
137 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
138
139cccdlflags (dlsrc.U):
140 This variable contains any special flags that might need to be
141 passed with 'cc -c' to compile modules to be used to create a shared
142 library that will be used for dynamic loading. For hpux, this
143 should be +z. It is up to the makefile to use it.
144
145ccdlflags (dlsrc.U):
146 This variable contains any special flags that might need to be
147 passed to cc to link with a shared library for dynamic loading.
148 It is up to the makefile to use it. For sunos 4.1, it should
149 be empty.
150
151ccflags (ccflags.U):
152 This variable contains any additional C compiler flags desired by
153 the user. It is up to the Makefile to use this.
154
155ccsymbols (Cppsym.U):
156 The variable contains the symbols defined by the C compiler alone.
157 The symbols defined by cpp or by cc when it calls cpp are not in
158 this list, see cppsymbols and cppccsymbols.
159 The list is a space-separated list of symbol=value tokens.
160
161cf_by (cf_who.U):
162 Login name of the person who ran the Configure script and answered the
163 questions. This is used to tag both config.sh and config_h.SH.
164
165cf_email (cf_email.U):
166 Electronic mail address of the person who ran Configure. This can be
167 used by units that require the user's e-mail, like MailList.U.
168
169cf_time (cf_who.U):
170 Holds the output of the "date" command when the configuration file was
171 produced. This is used to tag both config.sh and config_h.SH.
172
173chgrp (Loc.U):
174 This variable is defined but not used by Configure.
175 The value is a plain '' and is not useful.
176
177chmod (Loc.U):
178 This variable is defined but not used by Configure.
179 The value is a plain '' and is not useful.
180
181chown (Loc.U):
182 This variable is defined but not used by Configure.
183 The value is a plain '' and is not useful.
184
185clocktype (d_times.U):
186 This variable holds the type returned by times(). It can be long,
187 or clock_t on BSD sites (in which case <sys/types.h> should be
188 included).
189
190comm (Loc.U):
191 This variable is be used internally by Configure to determine the
192 full pathname (if any) of the comm program. After Configure runs,
193 the value is reset to a plain "comm" and is not useful.
194
195compress (Loc.U):
196 This variable is defined but not used by Configure.
197 The value is a plain '' and is not useful.
198
199contains (contains.U):
200 This variable holds the command to do a grep with a proper return
201 status. On most sane systems it is simply "grep". On insane systems
202 it is a grep followed by a cat followed by a test. This variable
203 is primarily for the use of other Configure units.
204
205cp (Loc.U):
206 This variable is be used internally by Configure to determine the
207 full pathname (if any) of the cp program. After Configure runs,
208 the value is reset to a plain "cp" and is not useful.
209
210cpio (Loc.U):
211 This variable is defined but not used by Configure.
212 The value is a plain '' and is not useful.
213
214cpp (Loc.U):
215 This variable is be used internally by Configure to determine the
216 full pathname (if any) of the cpp program. After Configure runs,
217 the value is reset to a plain "cpp" and is not useful.
218
219cpp_stuff (cpp_stuff.U):
220 This variable contains an identification of the catenation mechanism
221 used by the C preprocessor.
222
223cppccsymbols (Cppsym.U):
224 The variable contains the symbols defined by the C compiler when
225 when it calls cpp. The symbols defined by the cc alone or cpp
226 alone are not in this list, see ccsymbols and cppsymbols.
227 The list is a space-separated list of symbol=value tokens.
228
229cppflags (ccflags.U):
230 This variable holds the flags that will be passed to the C pre-
231 processor. It is up to the Makefile to use it.
232
233cpplast (cppstdin.U):
234 This variable has the same functionality as cppminus, only it applies
235 to cpprun and not cppstdin.
236
237cppminus (cppstdin.U):
238 This variable contains the second part of the string which will invoke
239 the C preprocessor on the standard input and produce to standard
240 output. This variable will have the value "-" if cppstdin needs
241 a minus to specify standard input, otherwise the value is "".
242
243cpprun (cppstdin.U):
244 This variable contains the command which will invoke a C preprocessor
245 on standard input and put the output to stdout. It is guaranteed not
246 to be a wrapper and may be a null string if no preprocessor can be
247 made directly available. This preprocessor might be different from the
248 one used by the C compiler. Don't forget to append cpplast after the
249 preprocessor options.
250
251cppstdin (cppstdin.U):
252 This variable contains the command which will invoke the C
253 preprocessor on standard input and put the output to stdout.
254 It is primarily used by other Configure units that ask about
255 preprocessor symbols.
256
257cppsymbols (Cppsym.U):
258 The variable contains the symbols defined by the C preprocessor
259 alone. The symbols defined by cc or by cc when it calls cpp are
260 not in this list, see ccsymbols and cppccsymbols.
261 The list is a space-separated list of symbol=value tokens.
262
263crosscompile (crosscompile.U):
264 This variable conditionally defines the CROSSCOMPILE symbol
265 which signifies that the build process is be a cross-compilation.
266 This is normally set by hints files or from Configure command line.
267
268cryptlib (d_crypt.U):
269 This variable holds -lcrypt or the path to a libcrypt.a archive if
270 the crypt() function is not defined in the standard C library. It is
271 up to the Makefile to use this.
272
273csh (Loc.U):
274 This variable is be used internally by Configure to determine the
275 full pathname (if any) of the csh program. After Configure runs,
276 the value is reset to a plain "csh" and is not useful.
277
278d_access (d_access.U):
279 This variable conditionally defines HAS_ACCESS if the access() system
280 call is available to check for access permissions using real IDs.
281
282d_accessx (d_accessx.U):
283 This variable conditionally defines the HAS_ACCESSX symbol, which
284 indicates to the C program that the accessx() routine is available.
285
286d_alarm (d_alarm.U):
287 This variable conditionally defines the HAS_ALARM symbol, which
288 indicates to the C program that the alarm() routine is available.
289
290d_archlib (archlib.U):
291 This variable conditionally defines ARCHLIB to hold the pathname
292 of architecture-dependent library files for $package. If
293 $archlib is the same as $privlib, then this is set to undef.
294
295d_attribut (d_attribut.U):
296 This variable conditionally defines HASATTRIBUTE, which
297 indicates the C compiler can check for function attributes,
298 such as printf formats.
299
300d_bcmp (d_bcmp.U):
301 This variable conditionally defines the HAS_BCMP symbol if
302 the bcmp() routine is available to compare strings.
303
304d_bcopy (d_bcopy.U):
305 This variable conditionally defines the HAS_BCOPY symbol if
306 the bcopy() routine is available to copy strings.
307
308d_bsd (Guess.U):
309 This symbol conditionally defines the symbol BSD when running on a
310 BSD system.
311
312d_bsdgetpgrp (d_getpgrp.U):
313 This variable conditionally defines USE_BSD_GETPGRP if
314 getpgrp needs one arguments whereas USG one needs none.
315
316d_bsdsetpgrp (d_setpgrp.U):
317 This variable conditionally defines USE_BSD_SETPGRP if
318 setpgrp needs two arguments whereas USG one needs none.
319 See also d_setpgid for a POSIX interface.
320
321d_bzero (d_bzero.U):
322 This variable conditionally defines the HAS_BZERO symbol if
323 the bzero() routine is available to set memory to 0.
324
325d_casti32 (d_casti32.U):
326 This variable conditionally defines CASTI32, which indicates
327 whether the C compiler can cast large floats to 32-bit ints.
328
329d_castneg (d_castneg.U):
330 This variable conditionally defines CASTNEG, which indicates
331 wether the C compiler can cast negative float to unsigned.
332
333d_charvspr (d_vprintf.U):
334 This variable conditionally defines CHARVSPRINTF if this system
335 has vsprintf returning type (char*). The trend seems to be to
336 declare it as "int vsprintf()".
337
338d_chown (d_chown.U):
339 This variable conditionally defines the HAS_CHOWN symbol, which
340 indicates to the C program that the chown() routine is available.
341
342d_chroot (d_chroot.U):
343 This variable conditionally defines the HAS_CHROOT symbol, which
344 indicates to the C program that the chroot() routine is available.
345
346d_chsize (d_chsize.U):
347 This variable conditionally defines the CHSIZE symbol, which
348 indicates to the C program that the chsize() routine is available
349 to truncate files. You might need a -lx to get this routine.
350
351d_closedir (d_closedir.U):
352 This variable conditionally defines HAS_CLOSEDIR if closedir() is
353 available.
354
355d_cmsghdr_s (d_socket.U):
356 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
357 which indicates that the the struct cmsghdr is supported.
358
359d_const (d_const.U):
360 This variable conditionally defines the HASCONST symbol, which
361 indicates to the C program that this C compiler knows about the
362 const type.
363
364d_crypt (d_crypt.U):
365 This variable conditionally defines the CRYPT symbol, which
366 indicates to the C program that the crypt() routine is available
367 to encrypt passwords and the like.
368
369d_csh (d_csh.U):
370 This variable conditionally defines the CSH symbol, which
371 indicates to the C program that the C-shell exists.
372
373d_cuserid (d_cuserid.U):
374 This variable conditionally defines the HAS_CUSERID symbol, which
375 indicates to the C program that the cuserid() routine is available
376 to get character login names.
377
378d_dbl_dig (d_dbl_dig.U):
379 This variable conditionally defines d_dbl_dig if this system's
380 header files provide DBL_DIG, which is the number of significant
381 digits in a double precision number.
382
383d_dbmclose64 (dbm64.U):
384 This variable conditionally defines the HAS_DBMCLOSE64 symbol, which
385 indicates to the C program that the dbmclose64() routine is available.
386
387d_dbminit64 (dbm64.U):
388 This variable conditionally defines the HAS_DBMINIT64 symbol, which
389 indicates to the C program that the dbminit64() routine is available.
390
391d_delete64 (dbm64.U):
392 This variable conditionally defines the HAS_DELETE64 symbol, which
393 indicates to the C program that the delete64() routine is available.
394
395d_difftime (d_difftime.U):
396 This variable conditionally defines the HAS_DIFFTIME symbol, which
397 indicates to the C program that the difftime() routine is available.
398
399d_dirent64_s (io64.U):
400 This symbol will be defined if the C compiler supports struct dirent64.
401
402d_dirnamlen (i_dirent.U):
403 This variable conditionally defines DIRNAMLEN, which indicates
404 to the C program that the length of directory entry names is
405 provided by a d_namelen field.
406
407d_dlerror (d_dlerror.U):
408 This variable conditionally defines the HAS_DLERROR symbol, which
409 indicates to the C program that the dlerror() routine is available.
410
411d_dlopen (d_dlopen.U):
412 This variable conditionally defines the HAS_DLOPEN symbol, which
413 indicates to the C program that the dlopen() routine is available.
414
415d_dlsymun (d_dlsymun.U):
416 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
417 indicates that we need to prepend an underscore to the symbol
418 name before calling dlsym().
419
420d_dosuid (d_dosuid.U):
421 This variable conditionally defines the symbol DOSUID, which
422 tells the C program that it should insert setuid emulation code
423 on hosts which have setuid #! scripts disabled.
424
425d_drand48proto (d_drand48proto.U):
426 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
427 which indicates to the C program that the system provides
428 a prototype for the drand48() function. Otherwise, it is
429 up to the program to supply one.
430
431d_dup2 (d_dup2.U):
432 This variable conditionally defines HAS_DUP2 if dup2() is
433 available to duplicate file descriptors.
434
435d_eaccess (d_eaccess.U):
436 This variable conditionally defines the HAS_EACCESS symbol, which
437 indicates to the C program that the eaccess() routine is available.
438
439d_endgrent (d_endgrent.U):
440 This variable conditionally defines the HAS_ENDGRENT symbol, which
441 indicates to the C program that the endgrent() routine is available
442 for sequential access of the group database.
443
444d_endhent (d_endhent.U):
445 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
446 available to close whatever was being used for host queries.
447
448d_endnent (d_endnent.U):
449 This variable conditionally defines HAS_ENDNETENT if endnetent() is
450 available to close whatever was being used for network queries.
451
452d_endpent (d_endpent.U):
453 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
454 available to close whatever was being used for protocol queries.
455
456d_endpwent (d_endpwent.U):
457 This variable conditionally defines the HAS_ENDPWENT symbol, which
458 indicates to the C program that the endpwent() routine is available
459 for sequential access of the passwd database.
460
461d_endsent (d_endsent.U):
462 This variable conditionally defines HAS_ENDSERVENT if endservent() is
463 available to close whatever was being used for service queries.
464
465d_endspent (d_endspent.U):
466 This variable conditionally defines HAS_ENDSPENT if endspent() is
467 available to finalize the scan of SysV shadow password entries.
468
469d_eofnblk (nblock_io.U):
470 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
471 when reading from a non-blocking I/O source.
472
473d_eunice (Guess.U):
474 This variable conditionally defines the symbols EUNICE and VAX, which
475 alerts the C program that it must deal with ideosyncracies of VMS.
476
477d_fchmod (d_fchmod.U):
478 This variable conditionally defines the HAS_FCHMOD symbol, which
479 indicates to the C program that the fchmod() routine is available
480 to change mode of opened files.
481
482d_fchown (d_fchown.U):
483 This variable conditionally defines the HAS_FCHOWN symbol, which
484 indicates to the C program that the fchown() routine is available
485 to change ownership of opened files.
486
487d_fcntl (d_fcntl.U):
488 This variable conditionally defines the HAS_FCNTL symbol, and indicates
489 whether the fcntl() function exists
490
491d_fd_macros (d_fd_set.U):
492 This variable contains the eventual value of the HAS_FD_MACROS symbol,
493 which indicates if your C compiler knows about the macros which
494 manipulate an fd_set.
495
496d_fd_set (d_fd_set.U):
497 This variable contains the eventual value of the HAS_FD_SET symbol,
498 which indicates if your C compiler knows about the fd_set typedef.
499
500d_fds_bits (d_fd_set.U):
501 This variable contains the eventual value of the HAS_FDS_BITS symbol,
502 which indicates if your fd_set typedef contains the fds_bits member.
503 If you have an fd_set typedef, but the dweebs who installed it did
504 a half-fast job and neglected to provide the macros to manipulate
505 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
506
507d_fetch64 (dbm64.U):
508 This variable conditionally defines the HAS_FETCH64 symbol, which
509 indicates to the C program that the fetch64() routine is available.
510
511d_fgetpos64 (stdio64.U):
512 This variable conditionally defines the HAS_FGETPOS64 symbol, which
513 indicates to the C program that the fgetpos64() routine is available.
514
515d_fgetpos (d_fgetpos.U):
516 This variable conditionally defines HAS_FGETPOS if fgetpos() is
517 available to get the file position indicator.
518
519d_firstkey64 (dbm64.U):
520 This variable conditionally defines the HAS_FIRSTKEY64 symbol, which
521 indicates to the C program that the firstkey64() routine is available.
522
523d_flexfnam (d_flexfnam.U):
524 This variable conditionally defines the FLEXFILENAMES symbol, which
525 indicates that the system supports filenames longer than 14 characters.
526
527d_flock64_s (io64.U):
528 This symbol will be defined if the C compiler supports struct flock64.
529
530d_flock (d_flock.U):
531 This variable conditionally defines HAS_FLOCK if flock() is
532 available to do file locking.
533
534d_fopen64 (stdio64.U):
535 This variable conditionally defines the HAS_FOPEN64 symbol, which
536 indicates to the C program that the fopen64() routine is available.
537
538d_fork (d_fork.U):
539 This variable conditionally defines the HAS_FORK symbol, which
540 indicates to the C program that the fork() routine is available.
541
542d_fpathconf (d_pathconf.U):
543 This variable conditionally defines the HAS_FPATHCONF symbol, which
544 indicates to the C program that the pathconf() routine is available
545 to determine file-system related limits and options associated
546 with a given open file descriptor.
547
548d_freopen64 (stdio64.U):
549 This variable conditionally defines the HAS_FREOPEN64 symbol, which
550 indicates to the C program that the freopen64() routine is available.
551
552d_fseek64 (stdio64.U):
553 This variable conditionally defines the HAS_FSEEK64 symbol, which
554 indicates to the C program that the fseek64() routine is available.
555
556d_fseeko64 (stdio64.U):
557 This variable conditionally defines the HAS_FSEEKO64 symbol, which
558 indicates to the C program that the fseeko64() routine is available.
559
560d_fseeko (d_fseeko.U):
561 This variable conditionally defines the HAS_FSEEKO symbol, which
562 indicates to the C program that the fseeko() routine is available.
563
564d_fsetpos64 (stdio64.U):
565 This variable conditionally defines the HAS_FSETPOS64 symbol, which
566 indicates to the C program that the fsetpos64() routine is available.
567
568d_fsetpos (d_fsetpos.U):
569 This variable conditionally defines HAS_FSETPOS if fsetpos() is
570 available to set the file position indicator.
571
572d_fstat64 (io64.U):
573 This variable conditionally defines the HAS_FSTAT64 symbol, which
574 indicates to the C program that the fstat64() routine is available.
575
576d_fstatfs (d_statfs.U):
577 This variable conditionally defines the HAS_FSTATFS symbol, which
578 indicates to the C program that the fstatfs() routine is available.
579
580d_fstatvfs (d_statvfs.U):
581 This variable conditionally defines the HAS_FSTATVFS symbol, which
582 indicates to the C program that the fstatvfs() routine is available.
583
584d_ftell64 (stdio64.U):
585 This variable conditionally defines the HAS_FTELL64 symbol, which
586 indicates to the C program that the ftell64() routine is available.
587
588d_ftello64 (stdio64.U):
589 This variable conditionally defines the HAS_FTELLO64 symbol, which
590 indicates to the C program that the ftello64() routine is available.
591
592d_ftello (d_ftello.U):
593 This variable conditionally defines the HAS_FTELLO symbol, which
594 indicates to the C program that the ftello() routine is available.
595
596d_ftime (d_ftime.U):
597 This variable conditionally defines the HAS_FTIME symbol, which indicates
598 that the ftime() routine exists. The ftime() routine is basically
599 a sub-second accuracy clock.
600
601d_ftruncate64 (io64.U):
602 This variable conditionally defines the HAS_FTRUNCATE64 symbol, which
603 indicates to the C program that the ftruncate64() routine is available.
604
605d_Gconvert (d_gconvert.U):
606 This variable holds what Gconvert is defined as to convert
607 floating point numbers into strings. It could be 'gconvert'
608 or a more complex macro emulating gconvert with gcvt() or sprintf.
609 Possible values are:
610 d_Gconvert='gconvert((x),(n),(t),(b))'
611 d_Gconvert='gcvt((x),(n),(b))'
612 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
613
614d_getgrent (d_getgrent.U):
615 This variable conditionally defines the HAS_GETGRENT symbol, which
616 indicates to the C program that the getgrent() routine is available
617 for sequential access of the group database.
618
619d_getgrps (d_getgrps.U):
620 This variable conditionally defines the HAS_GETGROUPS symbol, which
621 indicates to the C program that the getgroups() routine is available
622 to get the list of process groups.
623
624d_gethbyaddr (d_gethbyad.U):
625 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
626 indicates to the C program that the gethostbyaddr() routine is available
627 to look up hosts by their IP addresses.
628
629d_gethbyname (d_gethbynm.U):
630 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
631 indicates to the C program that the gethostbyname() routine is available
632 to look up host names in some data base or other.
633
634d_gethent (d_gethent.U):
635 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
636 available to look up host names in some data base or another.
637
638d_gethname (d_gethname.U):
639 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
640 indicates to the C program that the gethostname() routine may be
641 used to derive the host name.
642
643d_gethostprotos (d_gethostprotos.U):
644 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
645 which indicates to the C program that <netdb.h> supplies
646 prototypes for the various gethost*() functions.
647 See also netdbtype.U for probing for various netdb types.
648
649d_getlogin (d_getlogin.U):
650 This variable conditionally defines the HAS_GETLOGIN symbol, which
651 indicates to the C program that the getlogin() routine is available
652 to get the login name.
653
654d_getmntent (d_getmntent.U):
655 This variable conditionally defines the HAS_GETMNTENT symbol, which
656 indicates to the C program that the getmntent() routine is available
657 to iterate through mounted files.
658
659d_getnbyaddr (d_getnbyad.U):
660 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
661 indicates to the C program that the getnetbyaddr() routine is available
662 to look up networks by their IP addresses.
663
664d_getnbyname (d_getnbynm.U):
665 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
666 indicates to the C program that the getnetbyname() routine is available
667 to look up networks by their names.
668
669d_getnent (d_getnent.U):
670 This variable conditionally defines HAS_GETNETENT if getnetent() is
671 available to look up network names in some data base or another.
672
673d_getnetprotos (d_getnetprotos.U):
674 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
675 which indicates to the C program that <netdb.h> supplies
676 prototypes for the various getnet*() functions.
677 See also netdbtype.U for probing for various netdb types.
678
679d_getpbyname (d_getprotby.U):
680 This variable conditionally defines the HAS_GETPROTOBYNAME
681 symbol, which indicates to the C program that the
682 getprotobyname() routine is available to look up protocols
683 by their name.
684
685d_getpbynumber (d_getprotby.U):
686 This variable conditionally defines the HAS_GETPROTOBYNUMBER
687 symbol, which indicates to the C program that the
688 getprotobynumber() routine is available to look up protocols
689 by their number.
690
691d_getpent (d_getpent.U):
692 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
693 available to look up protocols in some data base or another.
694
695d_getpgid (d_getpgid.U):
696 This variable conditionally defines the HAS_GETPGID symbol, which
697 indicates to the C program that the getpgid(pid) function
698 is available to get the process group id.
699
700d_getpgrp2 (d_getpgrp2.U):
701 This variable conditionally defines the HAS_GETPGRP2 symbol, which
702 indicates to the C program that the getpgrp2() (as in DG/UX) routine
703 is available to get the current process group.
704
705d_getpgrp (d_getpgrp.U):
706 This variable conditionally defines HAS_GETPGRP if getpgrp() is
707 available to get the current process group.
708
709d_getppid (d_getppid.U):
710 This variable conditionally defines the HAS_GETPPID symbol, which
711 indicates to the C program that the getppid() routine is available
712 to get the parent process ID.
713
714d_getprior (d_getprior.U):
715 This variable conditionally defines HAS_GETPRIORITY if getpriority()
716 is available to get a process's priority.
717
718d_getprotoprotos (d_getprotoprotos.U):
719 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
720 which indicates to the C program that <netdb.h> supplies
721 prototypes for the various getproto*() functions.
722 See also netdbtype.U for probing for various netdb types.
723
724d_getpwent (d_getpwent.U):
725 This variable conditionally defines the HAS_GETPWENT symbol, which
726 indicates to the C program that the getpwent() routine is available
727 for sequential access of the passwd database.
728
729d_getsbyname (d_getsrvby.U):
730 This variable conditionally defines the HAS_GETSERVBYNAME
731 symbol, which indicates to the C program that the
732 getservbyname() routine is available to look up services
733 by their name.
734
735d_getsbyport (d_getsrvby.U):
736 This variable conditionally defines the HAS_GETSERVBYPORT
737 symbol, which indicates to the C program that the
738 getservbyport() routine is available to look up services
739 by their port.
740
741d_getsent (d_getsent.U):
742 This variable conditionally defines HAS_GETSERVENT if getservent() is
743 available to look up network services in some data base or another.
744
745d_getservprotos (d_getservprotos.U):
746 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
747 which indicates to the C program that <netdb.h> supplies
748 prototypes for the various getserv*() functions.
749 See also netdbtype.U for probing for various netdb types.
750
751d_getspent (d_getspent.U):
752 This variable conditionally defines HAS_GETSPENT if getspent() is
753 available to retrieve SysV shadow password entries sequentially.
754
755d_getspnam (d_getspnam.U):
756 This variable conditionally defines HAS_GETSPNAM if getspnam() is
757 available to retrieve SysV shadow password entries by name.
758
759d_gettimeod (d_ftime.U):
760 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
761 indicates that the gettimeofday() system call exists (to obtain a
762 sub-second accuracy clock). You should probably include <sys/resource.h>.
763
764d_gnulibc (d_gnulibc.U):
765 Defined if we're dealing with the GNU C Library.
766
767d_grpasswd (i_grp.U):
768 This variable conditionally defines GRPASSWD, which indicates
769 that struct group in <grp.h> contains gr_passwd.
770
771d_hasmntopt (d_hasmntopt.U):
772 This variable conditionally defines the HAS_HASMNTOPT symbol, which
773 indicates to the C program that the hasmntopt() routine is available
774 to query the mount options of file systems.
775
776d_htonl (d_htonl.U):
777 This variable conditionally defines HAS_HTONL if htonl() and its
778 friends are available to do network order byte swapping.
779
780d_index (d_strchr.U):
781 This variable conditionally defines HAS_INDEX if index() and
782 rindex() are available for string searching.
783
784d_inetaton (d_inetaton.U):
785 This variable conditionally defines the HAS_INET_ATON symbol, which
786 indicates to the C program that the inet_aton() function is available
787 to parse IP address "dotted-quad" strings.
788
789d_ino64_t (io64.U):
790 This symbol will be defined if the C compiler supports ino64_t.
791
792d_int64t (i_inttypes.U):
793 This symbol will be defined if the C compiler supports int64_t.
794
795d_iovec_s (i_sysuio.U):
796 This variable conditionally defines the HAS_STRUCT_IOVEC symbol,
797 which indicates that the struct iovec is supported.
798
799d_isascii (d_isascii.U):
800 This variable conditionally defines the HAS_ISASCII constant,
801 which indicates to the C program that isascii() is available.
802
803d_killpg (d_killpg.U):
804 This variable conditionally defines the HAS_KILLPG symbol, which
805 indicates to the C program that the killpg() routine is available
806 to kill process groups.
807
808d_lchown (d_lchown.U):
809 This variable conditionally defines the HAS_LCHOWN symbol, which
810 indicates to the C program that the lchown() routine is available
811 to operate on a symbolic link (instead of following the link).
812
813d_link (d_link.U):
814 This variable conditionally defines HAS_LINK if link() is
815 available to create hard links.
816
817d_llseek (io64.U):
818 This variable conditionally defines the HAS_LLSEEK symbol, which
819 indicates to the C program that the llseek() routine is available.
820
821d_locconv (d_locconv.U):
822 This variable conditionally defines HAS_LOCALECONV if localeconv() is
823 available for numeric and monetary formatting conventions.
824
825d_lockf64 (io64.U):
826 This variable conditionally defines the HAS_LOCKF64 symbol, which
827 indicates to the C program that the lockf64() routine is available.
828
829d_lockf (d_lockf.U):
830 This variable conditionally defines HAS_LOCKF if lockf() is
831 available to do file locking.
832
833d_longdbl (d_longdbl.U):
834 This variable conditionally defines HAS_LONG_DOUBLE if
835 the long double type is supported.
836
837d_longlong (d_longlong.U):
838 This variable conditionally defines HAS_LONG_LONG if
839 the long long type is supported.
840
841d_lseek64 (io64.U):
842 This variable conditionally defines the HAS_LSEEK64 symbol, which
843 indicates to the C program that the lseek64() routine is available.
844
845d_lstat64 (io64.U):
846 This variable conditionally defines the HAS_LSTAT64 symbol, which
847 indicates to the C program that the lstat64() routine is available.
848
849d_lstat (d_lstat.U):
850 This variable conditionally defines HAS_LSTAT if lstat() is
851 available to do file stats on symbolic links.
852
853d_madvise (d_madvise.U):
854 This variable conditionally defines HAS_MADVISE if madvise() is
855 available to map a file into memory.
856
857d_mblen (d_mblen.U):
858 This variable conditionally defines the HAS_MBLEN symbol, which
859 indicates to the C program that the mblen() routine is available
860 to find the number of bytes in a multibye character.
861
862d_mbstowcs (d_mbstowcs.U):
863 This variable conditionally defines the HAS_MBSTOWCS symbol, which
864 indicates to the C program that the mbstowcs() routine is available
865 to convert a multibyte string into a wide character string.
866
867d_mbtowc (d_mbtowc.U):
868 This variable conditionally defines the HAS_MBTOWC symbol, which
869 indicates to the C program that the mbtowc() routine is available
870 to convert multibyte to a wide character.
871
872d_memchr (d_memchr.U):
873 This variable conditionally defines the HAS_MEMCHR symbol, which
874 indicates to the C program that the memchr() routine is available
875 to locate characters within a C string.
876
877d_memcmp (d_memcmp.U):
878 This variable conditionally defines the HAS_MEMCMP symbol, which
879 indicates to the C program that the memcmp() routine is available
880 to compare blocks of memory.
881
882d_memcpy (d_memcpy.U):
883 This variable conditionally defines the HAS_MEMCPY symbol, which
884 indicates to the C program that the memcpy() routine is available
885 to copy blocks of memory.
886
887d_memmove (d_memmove.U):
888 This variable conditionally defines the HAS_MEMMOVE symbol, which
889 indicates to the C program that the memmove() routine is available
890 to copy potentatially overlapping blocks of memory.
891
892d_memset (d_memset.U):
893 This variable conditionally defines the HAS_MEMSET symbol, which
894 indicates to the C program that the memset() routine is available
895 to set blocks of memory.
896
897d_mkdir (d_mkdir.U):
898 This variable conditionally defines the HAS_MKDIR symbol, which
899 indicates to the C program that the mkdir() routine is available
900 to create directories..
901
902d_mkfifo (d_mkfifo.U):
903 This variable conditionally defines the HAS_MKFIFO symbol, which
904 indicates to the C program that the mkfifo() routine is available.
905
906d_mktime (d_mktime.U):
907 This variable conditionally defines the HAS_MKTIME symbol, which
908 indicates to the C program that the mktime() routine is available.
909
910d_mmap (d_mmap.U):
911 This variable conditionally defines HAS_MMAP if mmap() is
912 available to map a file into memory.
913
914d_mprotect (d_mprotect.U):
915 This variable conditionally defines HAS_MPROTECT if mprotect() is
916 available to modify the access protection of a memory mapped file.
917
918d_msg (d_msg.U):
919 This variable conditionally defines the HAS_MSG symbol, which
920 indicates that the entire msg*(2) library is present.
921
922d_msg_ctrunc (d_socket.U):
923 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
924 which indicates that the MSG_CTRUNC is available. #ifdef is
925 not enough because it may be an enum, glibc has been known to do this.
926
927d_msg_dontroute (d_socket.U):
928 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
929 which indicates that the MSG_DONTROUTE is available. #ifdef is
930 not enough because it may be an enum, glibc has been known to do this.
931
932d_msg_oob (d_socket.U):
933 This variable conditionally defines the HAS_MSG_OOB symbol,
934 which indicates that the MSG_OOB is available. #ifdef is
935 not enough because it may be an enum, glibc has been known to do this.
936
937d_msg_peek (d_socket.U):
938 This variable conditionally defines the HAS_MSG_PEEK symbol,
939 which indicates that the MSG_PEEK is available. #ifdef is
940 not enough because it may be an enum, glibc has been known to do this.
941
942d_msg_proxy (d_socket.U):
943 This variable conditionally defines the HAS_MSG_PROXY symbol,
944 which indicates that the MSG_PROXY is available. #ifdef is
945 not enough because it may be an enum, glibc has been known to do this.
946
947d_msgctl (d_msgctl.U):
948 This variable conditionally defines the HAS_MSGCTL symbol, which
949 indicates to the C program that the msgctl() routine is available.
950
951d_msgget (d_msgget.U):
952 This variable conditionally defines the HAS_MSGGET symbol, which
953 indicates to the C program that the msgget() routine is available.
954
955d_msghdr_s (d_socket.U):
956 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
957 which indicates that the struct msghdr is supported.
958
959d_msgrcv (d_msgrcv.U):
960 This variable conditionally defines the HAS_MSGRCV symbol, which
961 indicates to the C program that the msgrcv() routine is available.
962
963d_msgsnd (d_msgsnd.U):
964 This variable conditionally defines the HAS_MSGSND symbol, which
965 indicates to the C program that the msgsnd() routine is available.
966
967d_msync (d_msync.U):
968 This variable conditionally defines HAS_MSYNC if msync() is
969 available to synchronize a mapped file.
970
971d_munmap (d_munmap.U):
972 This variable conditionally defines HAS_MUNMAP if munmap() is
973 available to unmap a region mapped by mmap().
974
975d_mymalloc (mallocsrc.U):
976 This variable conditionally defines MYMALLOC in case other parts
977 of the source want to take special action if MYMALLOC is used.
978 This may include different sorts of profiling or error detection.
979
980d_nextkey64 (dbm64.U):
981 This variable conditionally defines the HAS_NEXTKEY64 symbol, which
982 indicates to the C program that the nextkey64() routine is available.
983
984d_nice (d_nice.U):
985 This variable conditionally defines the HAS_NICE symbol, which
986 indicates to the C program that the nice() routine is available.
987
988d_off64_t (io64.U):
989 This symbol will be defined if the C compiler supports off64_t.
990
991d_offset_t (io64.U):
992 This symbol will be defined if the C compiler supports offset_t.
993
994d_old_pthread_create_joinable (d_pthrattrj.U):
995 This variable conditionally defines pthread_create_joinable.
996 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
997
998d_oldpthreads (usethreads.U):
999 This variable conditionally defines the OLD_PTHREADS_API symbol,
1000 and indicates that Perl should be built to use the old
1001 draft POSIX threads API. This is only potneially meaningful if
1002 usethreads is set.
1003
1004d_oldsock (d_socket.U):
1005 This variable conditionally defines the OLDSOCKET symbol, which
1006 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1007
1008d_open3 (d_open3.U):
1009 This variable conditionally defines the HAS_OPEN3 manifest constant,
1010 which indicates to the C program that the 3 argument version of
1011 the open(2) function is available.
1012
1013d_open64 (io64.U):
1014 This variable conditionally defines the HAS_OPEN64 symbol, which
1015 indicates to the C program that the open64() routine is available.
1016
1017d_opendir64 (io64.U):
1018 This variable conditionally defines the HAS_OPENDIR64 symbol, which
1019 indicates to the C program that the opendir64() routine is available.
1020
1021d_pathconf (d_pathconf.U):
1022 This variable conditionally defines the HAS_PATHCONF symbol, which
1023 indicates to the C program that the pathconf() routine is available
1024 to determine file-system related limits and options associated
1025 with a given filename.
1026
1027d_pause (d_pause.U):
1028 This variable conditionally defines the HAS_PAUSE symbol, which
1029 indicates to the C program that the pause() routine is available
1030 to suspend a process until a signal is received.
1031
1032d_phostname (d_gethname.U):
1033 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1034 contains the shell command which, when fed to popen(), may be
1035 used to derive the host name.
1036
1037d_pipe (d_pipe.U):
1038 This variable conditionally defines the HAS_PIPE symbol, which
1039 indicates to the C program that the pipe() routine is available
1040 to create an inter-process channel.
1041
1042d_poll (d_poll.U):
1043 This variable conditionally defines the HAS_POLL symbol, which
1044 indicates to the C program that the poll() routine is available
1045 to poll active file descriptors.
1046
1047d_portable (d_portable.U):
1048 This variable conditionally defines the PORTABLE symbol, which
1049 indicates to the C program that it should not assume that it is
1050 running on the machine it was compiled on.
1051
1052d_pthread_yield (d_pthread_y.U):
1053 This variable conditionally defines the HAS_PTHREAD_YIELD
1054 symbol if the pthread_yield routine is available to yield
1055 the execution of the current thread.
1056
1057d_pwage (i_pwd.U):
1058 This variable conditionally defines PWAGE, which indicates
1059 that struct passwd contains pw_age.
1060
1061d_pwchange (i_pwd.U):
1062 This variable conditionally defines PWCHANGE, which indicates
1063 that struct passwd contains pw_change.
1064
1065d_pwclass (i_pwd.U):
1066 This variable conditionally defines PWCLASS, which indicates
1067 that struct passwd contains pw_class.
1068
1069d_pwcomment (i_pwd.U):
1070 This variable conditionally defines PWCOMMENT, which indicates
1071 that struct passwd contains pw_comment.
1072
1073d_pwexpire (i_pwd.U):
1074 This variable conditionally defines PWEXPIRE, which indicates
1075 that struct passwd contains pw_expire.
1076
1077d_pwgecos (i_pwd.U):
1078 This variable conditionally defines PWGECOS, which indicates
1079 that struct passwd contains pw_gecos.
1080
1081d_pwpasswd (i_pwd.U):
1082 This variable conditionally defines PWPASSWD, which indicates
1083 that struct passwd contains pw_passwd.
1084
1085d_pwquota (i_pwd.U):
1086 This variable conditionally defines PWQUOTA, which indicates
1087 that struct passwd contains pw_quota.
1088
1089d_readdir64 (io64.U):
1090 This variable conditionally defines the HAS_READDIR64 symbol, which
1091 indicates to the C program that the readdir64() routine is available.
1092
1093d_readdir (d_readdir.U):
1094 This variable conditionally defines HAS_READDIR if readdir() is
1095 available to read directory entries.
1096
1097d_readlink (d_readlink.U):
1098 This variable conditionally defines the HAS_READLINK symbol, which
1099 indicates to the C program that the readlink() routine is available
1100 to read the value of a symbolic link.
1101
1102d_readv (d_readv.U):
1103 This variable conditionally defines the HAS_READV symbol, which
1104 indicates to the C program that the readv() routine is available.
1105
1106d_recvmsg (d_socket.U):
1107 This variable conditionally defines the HAS_RECVMSG symbol,
1108 which indicates that the recvmsg is supported.
1109
1110d_rename (d_rename.U):
1111 This variable conditionally defines the HAS_RENAME symbol, which
1112 indicates to the C program that the rename() routine is available
1113 to rename files.
1114
1115d_rewinddir (d_readdir.U):
1116 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1117 available.
1118
1119d_rmdir (d_rmdir.U):
1120 This variable conditionally defines HAS_RMDIR if rmdir() is
1121 available to remove directories.
1122
1123d_safebcpy (d_safebcpy.U):
1124 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1125 the bcopy() routine can do overlapping copies.
1126
1127d_safemcpy (d_safemcpy.U):
1128 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1129 the memcpy() routine can do overlapping copies.
1130
1131d_sanemcmp (d_sanemcmp.U):
1132 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1133 the memcpy() routine is available and can be used to compare relative
1134 magnitudes of chars with their high bits set.
1135
1136d_sched_yield (d_pthread_y.U):
1137 This variable conditionally defines the HAS_SCHED_YIELD
1138 symbol if the sched_yield routine is available to yield
1139 the execution of the current thread.
1140
1141d_scm_rights (d_socket.U):
1142 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1143 which indicates that the SCM_RIGHTS is available. #ifdef is
1144 not enough because it may be an enum, glibc has been known to do this.
1145
1146d_seekdir64 (io64.U):
1147 This variable conditionally defines the HAS_SEEKDIR64 symbol, which
1148 indicates to the C program that the seekdir64() routine is available.
1149
1150d_seekdir (d_readdir.U):
1151 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1152 available.
1153
1154d_select (d_select.U):
1155 This variable conditionally defines HAS_SELECT if select() is
1156 available to select active file descriptors. A <sys/time.h>
1157 inclusion may be necessary for the timeout field.
1158
1159d_sem (d_sem.U):
1160 This variable conditionally defines the HAS_SEM symbol, which
1161 indicates that the entire sem*(2) library is present.
1162
1163d_semctl (d_semctl.U):
1164 This variable conditionally defines the HAS_SEMCTL symbol, which
1165 indicates to the C program that the semctl() routine is available.
1166
1167d_semctl_semid_ds (d_union_semun.U):
1168 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1169 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1170
1171d_semctl_semun (d_union_semun.U):
1172 This variable conditionally defines USE_SEMCTL_SEMUN, which
1173 indicates that union semun is to be used for semctl IPC_STAT.
1174
1175d_semget (d_semget.U):
1176 This variable conditionally defines the HAS_SEMGET symbol, which
1177 indicates to the C program that the semget() routine is available.
1178
1179d_semop (d_semop.U):
1180 This variable conditionally defines the HAS_SEMOP symbol, which
1181 indicates to the C program that the semop() routine is available.
1182
1183d_sendmsg (d_socket.U):
1184 This variable conditionally defines the HAS_SENDMSG symbol,
1185 which indicates that the sendmsg is supported.
1186
1187d_setegid (d_setegid.U):
1188 This variable conditionally defines the HAS_SETEGID symbol, which
1189 indicates to the C program that the setegid() routine is available
1190 to change the effective gid of the current program.
1191
1192d_seteuid (d_seteuid.U):
1193 This variable conditionally defines the HAS_SETEUID symbol, which
1194 indicates to the C program that the seteuid() routine is available
1195 to change the effective uid of the current program.
1196
1197d_setgrent (d_setgrent.U):
1198 This variable conditionally defines the HAS_SETGRENT symbol, which
1199 indicates to the C program that the setgrent() routine is available
1200 for initializing sequential access to the group database.
1201
1202d_setgrps (d_setgrps.U):
1203 This variable conditionally defines the HAS_SETGROUPS symbol, which
1204 indicates to the C program that the setgroups() routine is available
1205 to set the list of process groups.
1206
1207d_sethent (d_sethent.U):
1208 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1209 available.
1210
1211d_setlinebuf (d_setlnbuf.U):
1212 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1213 indicates to the C program that the setlinebuf() routine is available
1214 to change stderr or stdout from block-buffered or unbuffered to a
1215 line-buffered mode.
1216
1217d_setlocale (d_setlocale.U):
1218 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1219 available to handle locale-specific ctype implementations.
1220
1221d_setnent (d_setnent.U):
1222 This variable conditionally defines HAS_SETNETENT if setnetent() is
1223 available.
1224
1225d_setpent (d_setpent.U):
1226 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1227 available.
1228
1229d_setpgid (d_setpgid.U):
1230 This variable conditionally defines the HAS_SETPGID symbol if the
1231 setpgid(pid, gpid) function is available to set process group ID.
1232
1233d_setpgrp2 (d_setpgrp2.U):
1234 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1235 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1236 is available to set the current process group.
1237
1238d_setpgrp (d_setpgrp.U):
1239 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1240 available to set the current process group.
1241
1242d_setprior (d_setprior.U):
1243 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1244 is available to set a process's priority.
1245
1246d_setpwent (d_setpwent.U):
1247 This variable conditionally defines the HAS_SETPWENT symbol, which
1248 indicates to the C program that the setpwent() routine is available
1249 for initializing sequential access to the passwd database.
1250
1251d_setregid (d_setregid.U):
1252 This variable conditionally defines HAS_SETREGID if setregid() is
1253 available to change the real and effective gid of the current
1254 process.
1255
1256d_setresgid (d_setregid.U):
1257 This variable conditionally defines HAS_SETRESGID if setresgid() is
1258 available to change the real, effective and saved gid of the current
1259 process.
1260
1261d_setresuid (d_setreuid.U):
1262 This variable conditionally defines HAS_SETREUID if setresuid() is
1263 available to change the real, effective and saved uid of the current
1264 process.
1265
1266d_setreuid (d_setreuid.U):
1267 This variable conditionally defines HAS_SETREUID if setreuid() is
1268 available to change the real and effective uid of the current
1269 process.
1270
1271d_setrgid (d_setrgid.U):
1272 This variable conditionally defines the HAS_SETRGID symbol, which
1273 indicates to the C program that the setrgid() routine is available
1274 to change the real gid of the current program.
1275
1276d_setruid (d_setruid.U):
1277 This variable conditionally defines the HAS_SETRUID symbol, which
1278 indicates to the C program that the setruid() routine is available
1279 to change the real uid of the current program.
1280
1281d_setsent (d_setsent.U):
1282 This variable conditionally defines HAS_SETSERVENT if setservent() is
1283 available.
1284
1285d_setsid (d_setsid.U):
1286 This variable conditionally defines HAS_SETSID if setsid() is
1287 available to set the process group ID.
1288
1289d_setspent (d_setspent.U):
1290 This variable conditionally defines HAS_SETSPENT if setspent() is
1291 available to initialize the scan of SysV shadow password entries.
1292
1293d_setvbuf (d_setvbuf.U):
1294 This variable conditionally defines the HAS_SETVBUF symbol, which
1295 indicates to the C program that the setvbuf() routine is available
1296 to change buffering on an open stdio stream.
1297
1298d_sfio (d_sfio.U):
1299 This variable conditionally defines the USE_SFIO symbol,
1300 and indicates whether sfio is available (and should be used).
1301
1302d_shm (d_shm.U):
1303 This variable conditionally defines the HAS_SHM symbol, which
1304 indicates that the entire shm*(2) library is present.
1305
1306d_shmat (d_shmat.U):
1307 This variable conditionally defines the HAS_SHMAT symbol, which
1308 indicates to the C program that the shmat() routine is available.
1309
1310d_shmatprototype (d_shmat.U):
1311 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1312 symbol, which indicates that sys/shm.h has a prototype for
1313 shmat.
1314
1315d_shmctl (d_shmctl.U):
1316 This variable conditionally defines the HAS_SHMCTL symbol, which
1317 indicates to the C program that the shmctl() routine is available.
1318
1319d_shmdt (d_shmdt.U):
1320 This variable conditionally defines the HAS_SHMDT symbol, which
1321 indicates to the C program that the shmdt() routine is available.
1322
1323d_shmget (d_shmget.U):
1324 This variable conditionally defines the HAS_SHMGET symbol, which
1325 indicates to the C program that the shmget() routine is available.
1326
1327d_sigaction (d_sigaction.U):
1328 This variable conditionally defines the HAS_SIGACTION symbol, which
1329 indicates that the Vr4 sigaction() routine is available.
1330
1331d_sigsetjmp (d_sigsetjmp.U):
1332 This variable conditionally defines the HAS_SIGSETJMP symbol,
1333 which indicates that the sigsetjmp() routine is available to
1334 call setjmp() and optionally save the process's signal mask.
1335
1336d_socket (d_socket.U):
1337 This variable conditionally defines HAS_SOCKET, which indicates
1338 that the BSD socket interface is supported.
1339
1340d_sockpair (d_socket.U):
1341 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1342 indicates that the BSD socketpair() is supported.
1343
1344d_stat64 (io64.U):
1345 This variable conditionally defines the HAS_STAT64 symbol, which
1346 indicates to the C program that the stat64() routine is available.
1347
1348d_statblks (d_statblks.U):
1349 This variable conditionally defines USE_STAT_BLOCKS
1350 if this system has a stat structure declaring
1351 st_blksize and st_blocks.
1352
1353d_statfs (d_statfs.U):
1354 This variable conditionally defines the HAS_STATFS symbol, which
1355 indicates to the C program that the statfs() routine is available.
1356
1357d_statfsflags (d_statfs.U):
1358 This variable conditionally defines the HAS_STRUCT_STATFS_FLAGS
1359 symbol, which indicates to struct statfs from has f_flags member.
1360 This kind of struct statfs is coming from sys/mount.h (BSD),
1361 not from sys/statfs.h (SYSV).
1362
1363d_statvfs (d_statvfs.U):
1364 This variable conditionally defines the HAS_STATVFS symbol, which
1365 indicates to the C program that the statvfs() routine is available.
1366
1367d_stdio_cnt_lval (d_stdstdio.U):
1368 This variable conditionally defines STDIO_CNT_LVALUE if the
1369 FILE_cnt macro can be used as an lvalue.
1370
1371d_stdio_ptr_lval (d_stdstdio.U):
1372 This variable conditionally defines STDIO_PTR_LVALUE if the
1373 FILE_ptr macro can be used as an lvalue.
1374
1375d_stdio_stream_array (stdio_streams.U):
1376 This variable tells whether there is an array holding
1377 the stdio streams.
1378
1379d_stdiobase (d_stdstdio.U):
1380 This variable conditionally defines USE_STDIO_BASE if this system
1381 has a FILE structure declaring a usable _base field (or equivalent)
1382 in stdio.h.
1383
1384d_stdstdio (d_stdstdio.U):
1385 This variable conditionally defines USE_STDIO_PTR if this system
1386 has a FILE structure declaring usable _ptr and _cnt fields (or
1387 equivalent) in stdio.h.
1388
1389d_store64 (dbm64.U):
1390 This variable conditionally defines the HAS_STORE64 symbol, which
1391 indicates to the C program that the store64() routine is available.
1392
1393d_strchr (d_strchr.U):
1394 This variable conditionally defines HAS_STRCHR if strchr() and
1395 strrchr() are available for string searching.
1396
1397d_strcoll (d_strcoll.U):
1398 This variable conditionally defines HAS_STRCOLL if strcoll() is
1399 available to compare strings using collating information.
1400
1401d_strctcpy (d_strctcpy.U):
1402 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1403 indicates to the C program that this C compiler knows how to copy
1404 structures.
1405
1406d_strerrm (d_strerror.U):
1407 This variable holds what Strerrr is defined as to translate an error
1408 code condition into an error message string. It could be 'strerror'
1409 or a more complex macro emulating strrror with sys_errlist[], or the
1410 "unknown" string when both strerror and sys_errlist are missing.
1411
1412d_strerror (d_strerror.U):
1413 This variable conditionally defines HAS_STRERROR if strerror() is
1414 available to translate error numbers to strings.
1415
1416d_strtod (d_strtod.U):
1417 This variable conditionally defines the HAS_STRTOD symbol, which
1418 indicates to the C program that the strtod() routine is available
1419 to provide better numeric string conversion than atof().
1420
1421d_strtol (d_strtol.U):
1422 This variable conditionally defines the HAS_STRTOL symbol, which
1423 indicates to the C program that the strtol() routine is available
1424 to provide better numeric string conversion than atoi() and friends.
1425
1426d_strtoul (d_strtoul.U):
1427 This variable conditionally defines the HAS_STRTOUL symbol, which
1428 indicates to the C program that the strtoul() routine is available
1429 to provide conversion of strings to unsigned long.
1430
1431d_strxfrm (d_strxfrm.U):
1432 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1433 available to transform strings.
1434
1435d_suidsafe (d_dosuid.U):
1436 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1437 if setuid scripts can be secure. This test looks in /dev/fd/.
1438
1439d_symlink (d_symlink.U):
1440 This variable conditionally defines the HAS_SYMLINK symbol, which
1441 indicates to the C program that the symlink() routine is available
1442 to create symbolic links.
1443
1444d_syscall (d_syscall.U):
1445 This variable conditionally defines HAS_SYSCALL if syscall() is
1446 available call arbitrary system calls.
1447
1448d_sysconf (d_sysconf.U):
1449 This variable conditionally defines the HAS_SYSCONF symbol, which
1450 indicates to the C program that the sysconf() routine is available
1451 to determine system related limits and options.
1452
1453d_sysernlst (d_strerror.U):
1454 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1455 is available to translate error numbers to the symbolic name.
1456
1457d_syserrlst (d_strerror.U):
1458 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1459 available to translate error numbers to strings.
1460
1461d_system (d_system.U):
1462 This variable conditionally defines HAS_SYSTEM if system() is
1463 available to issue a shell command.
1464
1465d_tcgetpgrp (d_tcgtpgrp.U):
1466 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1467 indicates to the C program that the tcgetpgrp() routine is available.
1468 to get foreground process group ID.
1469
1470d_tcsetpgrp (d_tcstpgrp.U):
1471 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1472 indicates to the C program that the tcsetpgrp() routine is available
1473 to set foreground process group ID.
1474
1475d_telldir64 (io64.U):
1476 This variable conditionally defines the HAS_TELLDIR64 symbol, which
1477 indicates to the C program that the telldir64() routine is available.
1478
1479d_telldir (d_readdir.U):
1480 This variable conditionally defines HAS_TELLDIR if telldir() is
1481 available.
1482
1483d_telldirproto (d_telldirproto.U):
1484 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1485 which indicates to the C program that the system provides
1486 a prototype for the telldir() function. Otherwise, it is
1487 up to the program to supply one.
1488
1489d_time (d_time.U):
1490 This variable conditionally defines the HAS_TIME symbol, which indicates
1491 that the time() routine exists. The time() routine is normaly
1492 provided on UNIX systems.
1493
1494d_times (d_times.U):
1495 This variable conditionally defines the HAS_TIMES symbol, which indicates
1496 that the times() routine exists. The times() routine is normaly
1497 provided on UNIX systems. You may have to include <sys/times.h>.
1498
1499d_tmpfile64 (stdio64.U):
1500 This variable conditionally defines the HAS_TMPFILE64 symbol, which
1501 indicates to the C program that the tmpfile64() routine is available.
1502
1503d_truncate64 (io64.U):
1504 This variable conditionally defines the HAS_TRUNCATE64 symbol, which
1505 indicates to the C program that the truncate64() routine is available.
1506
1507d_truncate (d_truncate.U):
1508 This variable conditionally defines HAS_TRUNCATE if truncate() is
1509 available to truncate files.
1510
1511d_tzname (d_tzname.U):
1512 This variable conditionally defines HAS_TZNAME if tzname[] is
1513 available to access timezone names.
1514
1515d_umask (d_umask.U):
1516 This variable conditionally defines the HAS_UMASK symbol, which
1517 indicates to the C program that the umask() routine is available.
1518 to set and get the value of the file creation mask.
1519
1520d_uname (d_gethname.U):
1521 This variable conditionally defines the HAS_UNAME symbol, which
1522 indicates to the C program that the uname() routine may be
1523 used to derive the host name.
1524
1525d_union_semun (d_union_semun.U):
1526 This variable conditionally defines HAS_UNION_SEMUN if the
1527 union semun is defined by including <sys/sem.h>.
1528
1529d_vfork (d_vfork.U):
1530 This variable conditionally defines the HAS_VFORK symbol, which
1531 indicates the vfork() routine is available.
1532
1533d_void_closedir (d_closedir.U):
1534 This variable conditionally defines VOID_CLOSEDIR if closedir()
1535 does not return a value.
1536
1537d_voidsig (d_voidsig.U):
1538 This variable conditionally defines VOIDSIG if this system
1539 declares "void (*signal(...))()" in signal.h. The old way was to
1540 declare it as "int (*signal(...))()".
1541
1542d_voidtty (i_sysioctl.U):
1543 This variable conditionally defines USE_IOCNOTTY to indicate that the
1544 ioctl() call with TIOCNOTTY should be used to void tty association.
1545 Otherwise (on USG probably), it is enough to close the standard file
1546 decriptors and do a setpgrp().
1547
1548d_volatile (d_volatile.U):
1549 This variable conditionally defines the HASVOLATILE symbol, which
1550 indicates to the C program that this C compiler knows about the
1551 volatile declaration.
1552
1553d_vprintf (d_vprintf.U):
1554 This variable conditionally defines the HAS_VPRINTF symbol, which
1555 indicates to the C program that the vprintf() routine is available
1556 to printf with a pointer to an argument list.
1557
1558d_wait4 (d_wait4.U):
1559 This variable conditionally defines the HAS_WAIT4 symbol, which
1560 indicates the wait4() routine is available.
1561
1562d_waitpid (d_waitpid.U):
1563 This variable conditionally defines HAS_WAITPID if waitpid() is
1564 available to wait for child process.
1565
1566d_wcstombs (d_wcstombs.U):
1567 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1568 indicates to the C program that the wcstombs() routine is available
1569 to convert wide character strings to multibyte strings.
1570
1571d_wctomb (d_wctomb.U):
1572 This variable conditionally defines the HAS_WCTOMB symbol, which
1573 indicates to the C program that the wctomb() routine is available
1574 to convert a wide character to a multibyte.
1575
1576d_writev (d_writev.U):
1577 This variable conditionally defines the HAS_WRITEV symbol, which
1578 indicates to the C program that the writev() routine is available.
1579
1580d_xenix (Guess.U):
1581 This variable conditionally defines the symbol XENIX, which alerts
1582 the C program that it runs under Xenix.
1583
1584date (Loc.U):
1585 This variable is be used internally by Configure to determine the
1586 full pathname (if any) of the date program. After Configure runs,
1587 the value is reset to a plain "date" and is not useful.
1588
1589db_hashtype (i_db.U):
1590 This variable contains the type of the hash structure element
1591 in the <db.h> header file. In older versions of DB, it was
1592 int, while in newer ones it is u_int32_t.
1593
1594db_prefixtype (i_db.U):
1595 This variable contains the type of the prefix structure element
1596 in the <db.h> header file. In older versions of DB, it was
1597 int, while in newer ones it is size_t.
1598
1599defvoidused (voidflags.U):
1600 This variable contains the default value of the VOIDUSED symbol (15).
1601
1602direntrytype (i_dirent.U):
1603 This symbol is set to 'struct direct' or 'struct dirent' depending on
1604 whether dirent is available or not. You should use this pseudo type to
1605 portably declare your directory entries.
1606
1607dlext (dlext.U):
1608 This variable contains the extension that is to be used for the
1609 dynamically loaded modules that perl generaties.
1610
1611dlsrc (dlsrc.U):
1612 This variable contains the name of the dynamic loading file that
1613 will be used with the package.
1614
1615doublesize (doublesize.U):
1616 This variable contains the value of the DOUBLESIZE symbol, which
1617 indicates to the C program how many bytes there are in a double.
1618
1619drand01 (randfunc.U):
1620 Indicates the macro to be used to generate normalized
1621 random numbers. Uses randfunc, often divided by
1622 (double) (((unsigned long) 1 << randbits)) in order to
1623 normalize the result.
1624 In C programs, the macro 'Drand01' is mapped to drand01.
1625
1626dynamic_ext (Extensions.U):
1627 This variable holds a list of XS extension files we want to
1628 link dynamically into the package. It is used by Makefile.
1629
1630eagain (nblock_io.U):
1631 This variable bears the symbolic errno code set by read() when no
1632 data is present on the file and non-blocking I/O was enabled (otherwise,
1633 read() blocks naturally).
1634
1635ebcdic (ebcdic.U):
1636 This variable conditionally defines EBCDIC if this
1637 system uses EBCDIC encoding. Among other things, this
1638 means that the character ranges are not contiguous.
1639 See trnl.U
1640
1641echo (Loc.U):
1642 This variable is be used internally by Configure to determine the
1643 full pathname (if any) of the echo program. After Configure runs,
1644 the value is reset to a plain "echo" and is not useful.
1645
1646egrep (Loc.U):
1647 This variable is be used internally by Configure to determine the
1648 full pathname (if any) of the egrep program. After Configure runs,
1649 the value is reset to a plain "egrep" and is not useful.
1650
1651emacs (Loc.U):
1652 This variable is defined but not used by Configure.
1653 The value is a plain '' and is not useful.
1654
1655eunicefix (Init.U):
1656 When running under Eunice this variable contains a command which will
1657 convert a shell script to the proper form of text file for it to be
1658 executable by the shell. On other systems it is a no-op.
1659
1660exe_ext (Unix.U):
1661 This is an old synonym for _exe.
1662
1663expr (Loc.U):
1664 This variable is be used internally by Configure to determine the
1665 full pathname (if any) of the expr program. After Configure runs,
1666 the value is reset to a plain "expr" and is not useful.
1667
1668extensions (Extensions.U):
1669 This variable holds a list of all extension files (both XS and
1670 non-xs linked into the package. It is propagated to Config.pm
1671 and is typically used to test whether a particular extesion
1672 is available.
1673
1674fflushall (fflushall.U):
1675 This symbol, if defined, tells that to flush
1676 all pending stdio output one must loop through all
1677 the stdio file handles stored in an array and fflush them.
1678 Note that if fflushNULL is defined, fflushall will not
1679 even be probed for and will be left undefined.
1680
1681fflushNULL (fflushall.U):
1682 This symbol, if defined, tells that fflush(NULL) does flush
1683 all pending stdio output.
1684
1685find (Loc.U):
1686 This variable is defined but not used by Configure.
1687 The value is a plain '' and is not useful.
1688
1689firstmakefile (Unix.U):
1690 This variable defines the first file searched by make. On unix,
1691 it is makefile (then Makefile). On case-insensitive systems,
1692 it might be something else. This is only used to deal with
1693 convoluted make depend tricks.
1694
1695flex (Loc.U):
1696 This variable is defined but not used by Configure.
1697 The value is a plain '' and is not useful.
1698
1699fpostype (fpostype.U):
1700 This variable defines Fpos_t to be something like fpost_t, long,
1701 uint, or whatever type is used to declare file positions in libc.
1702
1703freetype (mallocsrc.U):
1704 This variable contains the return type of free(). It is usually
1705 void, but occasionally int.
1706
1707full_ar (Loc_ar.U):
1708 This variable contains the full pathname to 'ar', whether or
1709 not the user has specified 'portability'. This is only used
1710 in the Makefile.SH.
1711
1712full_csh (d_csh.U):
1713 This variable contains the full pathname to 'csh', whether or
1714 not the user has specified 'portability'. This is only used
1715 in the compiled C program, and we assume that all systems which
1716 can share this executable will have the same full pathname to
1717 'csh.'
1718
1719full_sed (Loc_sed.U):
1720 This variable contains the full pathname to 'sed', whether or
1721 not the user has specified 'portability'. This is only used
1722 in the compiled C program, and we assume that all systems which
1723 can share this executable will have the same full pathname to
1724 'sed.'
1725
1726gccversion (cc.U):
1727 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1728 indicate whether the compiler is version 1 or 2. This is used in
1729 setting some of the default cflags. It is set to '' if not gcc.
1730
1731gidtype (gidtype.U):
1732 This variable defines Gid_t to be something like gid_t, int,
1733 ushort, or whatever type is used to declare the return type
1734 of getgid(). Typically, it is the type of group ids in the kernel.
1735
1736glibpth (libpth.U):
1737 This variable holds the general path (space-separated) used to
1738 find libraries. It may contain directories that do not exist on
1739 this platform, libpth is the cleaned-up version.
1740
1741grep (Loc.U):
1742 This variable is be used internally by Configure to determine the
1743 full pathname (if any) of the grep program. After Configure runs,
1744 the value is reset to a plain "grep" and is not useful.
1745
1746groupcat (nis.U):
1747 This variable contains a command that produces the text of the
1748 /etc/group file. This is normally "cat /etc/group", but can be
1749 "ypcat group" when NIS is used.
1750
1751groupstype (groupstype.U):
1752 This variable defines Groups_t to be something like gid_t, int,
1753 ushort, or whatever type is used for the second argument to
1754 getgroups() and setgroups(). Usually, this is the same as
1755 gidtype (gid_t), but sometimes it isn't.
1756
1757gzip (Loc.U):
1758 This variable is be used internally by Configure to determine the
1759 full pathname (if any) of the gzip program. After Configure runs,
1760 the value is reset to a plain "gzip" and is not useful.
1761
1762h_fcntl (h_fcntl.U):
1763 This is variable gets set in various places to tell i_fcntl that
1764 <fcntl.h> should be included.
1765
1766h_sysfile (h_sysfile.U):
1767 This is variable gets set in various places to tell i_sys_file that
1768 <sys/file.h> should be included.
1769
1770hint (Oldconfig.U):
1771 Gives the type of hints used for previous answers. May be one of
1772 "default", "recommended" or "previous".
1773
1774hostcat (nis.U):
1775 This variable contains a command that produces the text of the
1776 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1777 "ypcat hosts" when NIS is used.
1778
1779huge (models.U):
1780 This variable contains a flag which will tell the C compiler and loader
1781 to produce a program running with a huge memory model. If the
1782 huge model is not supported, contains the flag to produce large
1783 model programs. It is up to the Makefile to use this.
1784
1785i_arpainet (i_arpainet.U):
1786 This variable conditionally defines the I_ARPA_INET symbol,
1787 and indicates whether a C program should include <arpa/inet.h>.
1788
1789i_bsdioctl (i_sysioctl.U):
1790 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1791 indicates to the C program that <sys/bsdioctl.h> exists and should
1792 be included.
1793
1794i_db (i_db.U):
1795 This variable conditionally defines the I_DB symbol, and indicates
1796 whether a C program may include Berkeley's DB include file <db.h>.
1797
1798i_dbm (i_dbm.U):
1799 This variable conditionally defines the I_DBM symbol, which
1800 indicates to the C program that <dbm.h> exists and should
1801 be included.
1802
1803i_dirent (i_dirent.U):
1804 This variable conditionally defines I_DIRENT, which indicates
1805 to the C program that it should include <dirent.h>.
1806
1807i_dld (i_dld.U):
1808 This variable conditionally defines the I_DLD symbol, which
1809 indicates to the C program that <dld.h> (GNU dynamic loading)
1810 exists and should be included.
1811
1812i_dlfcn (i_dlfcn.U):
1813 This variable conditionally defines the I_DLFCN symbol, which
1814 indicates to the C program that <dlfcn.h> exists and should
1815 be included.
1816
1817i_fcntl (i_fcntl.U):
1818 This variable controls the value of I_FCNTL (which tells
1819 the C program to include <fcntl.h>).
1820
1821i_float (i_float.U):
1822 This variable conditionally defines the I_FLOAT symbol, and indicates
1823 whether a C program may include <float.h> to get symbols like DBL_MAX
1824 or DBL_MIN, i.e. machine dependent floating point values.
1825
1826i_gdbm (i_gdbm.U):
1827 This variable conditionally defines the I_GDBM symbol, which
1828 indicates to the C program that <gdbm.h> exists and should
1829 be included.
1830
1831i_grp (i_grp.U):
1832 This variable conditionally defines the I_GRP symbol, and indicates
1833 whether a C program should include <grp.h>.
1834
1835i_inttypes (i_inttypes.U):
1836 This variable conditionally defines the I_INTTYPES symbol,
1837 and indicates whether a C program should include <inttypes.h>.
1838
1839i_limits (i_limits.U):
1840 This variable conditionally defines the I_LIMITS symbol, and indicates
1841 whether a C program may include <limits.h> to get symbols like WORD_BIT
1842 and friends.
1843
1844i_locale (i_locale.U):
1845 This variable conditionally defines the I_LOCALE symbol,
1846 and indicates whether a C program should include <locale.h>.
1847
1848i_machcthr (i_machcthr.U):
1849 This variable conditionally defines the I_MACH_CTHREADS symbol,
1850 and indicates whether a C program should include <mach/cthreads.h>.
1851
1852i_malloc (i_malloc.U):
1853 This variable conditionally defines the I_MALLOC symbol, and indicates
1854 whether a C program should include <malloc.h>.
1855
1856i_math (i_math.U):
1857 This variable conditionally defines the I_MATH symbol, and indicates
1858 whether a C program may include <math.h>.
1859
1860i_memory (i_memory.U):
1861 This variable conditionally defines the I_MEMORY symbol, and indicates
1862 whether a C program should include <memory.h>.
1863
1864i_mntent (i_mntent.U):
1865 This variable conditionally defines the I_MNTENT symbol, and indicates
1866 whether a C program should include <mntent.h>.
1867
1868i_ndbm (i_ndbm.U):
1869 This variable conditionally defines the I_NDBM symbol, which
1870 indicates to the C program that <ndbm.h> exists and should
1871 be included.
1872
1873i_netdb (i_netdb.U):
1874 This variable conditionally defines the I_NETDB symbol, and indicates
1875 whether a C program should include <netdb.h>.
1876
1877i_neterrno (i_neterrno.U):
1878 This variable conditionally defines the I_NET_ERRNO symbol, which
1879 indicates to the C program that <net/errno.h> exists and should
1880 be included.
1881
1882i_netinettcp (i_netinettcp.U):
1883 This variable conditionally defines the I_NETINET_TCP symbol,
1884 and indicates whether a C program should include <netinet/tcp.h>.
1885
1886i_niin (i_niin.U):
1887 This variable conditionally defines I_NETINET_IN, which indicates
1888 to the C program that it should include <netinet/in.h>. Otherwise,
1889 you may try <sys/in.h>.
1890
1891i_poll (i_poll.U):
1892 This variable conditionally defines the I_POLL symbol, and indicates
1893 whether a C program should include <poll.h>.
1894
1895i_pthread (i_pthread.U):
1896 This variable conditionally defines the I_PTHREADEAD symbol,
1897 and indicates whether a C program should include <pthread.h>.
1898
1899i_pwd (i_pwd.U):
1900 This variable conditionally defines I_PWD, which indicates
1901 to the C program that it should include <pwd.h>.
1902
1903i_rpcsvcdbm (i_dbm.U):
1904 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1905 indicates to the C program that <rpcsvc/dbm.h> exists and should
1906 be included. Some System V systems might need this instead of <dbm.h>.
1907
1908i_sfio (i_sfio.U):
1909 This variable conditionally defines the I_SFIO symbol,
1910 and indicates whether a C program should include <sfio.h>.
1911
1912i_sgtty (i_termio.U):
1913 This variable conditionally defines the I_SGTTY symbol, which
1914 indicates to the C program that it should include <sgtty.h> rather
1915 than <termio.h>.
1916
1917i_shadow (i_shadow.U):
1918 This variable conditionally defines the I_SHADOW symbol, and indicates
1919 whether a C program should include <shadow.h>.
1920
1921i_socks (i_socks.U):
1922 This variable conditionally defines the I_SOCKS symbol, and indicates
1923 whether a C program should include <socks.h>.
1924
1925i_stdarg (i_varhdr.U):
1926 This variable conditionally defines the I_STDARG symbol, which
1927 indicates to the C program that <stdarg.h> exists and should
1928 be included.
1929
1930i_stddef (i_stddef.U):
1931 This variable conditionally defines the I_STDDEF symbol, which
1932 indicates to the C program that <stddef.h> exists and should
1933 be included.
1934
1935i_stdlib (i_stdlib.U):
1936 This variable conditionally defines the I_STDLIB symbol, which
1937 indicates to the C program that <stdlib.h> exists and should
1938 be included.
1939
1940i_string (i_string.U):
1941 This variable conditionally defines the I_STRING symbol, which
1942 indicates that <string.h> should be included rather than <strings.h>.
1943
1944i_sysaccess (i_sysaccess.U):
1945 This variable conditionally defines the I_SYS_ACCESS symbol,
1946 and indicates whether a C program should include <sys/access.h>.
1947
1948i_sysdir (i_sysdir.U):
1949 This variable conditionally defines the I_SYS_DIR symbol, and indicates
1950 whether a C program should include <sys/dir.h>.
1951
1952i_sysfile (i_sysfile.U):
1953 This variable conditionally defines the I_SYS_FILE symbol, and indicates
1954 whether a C program should include <sys/file.h> to get R_OK and friends.
1955
1956i_sysfilio (i_sysioctl.U):
1957 This variable conditionally defines the I_SYS_FILIO symbol, which
1958 indicates to the C program that <sys/filio.h> exists and should
1959 be included in preference to <sys/ioctl.h>.
1960
1961i_sysin (i_niin.U):
1962 This variable conditionally defines I_SYS_IN, which indicates
1963 to the C program that it should include <sys/in.h> instead of
1964 <netinet/in.h>.
1965
1966i_sysioctl (i_sysioctl.U):
1967 This variable conditionally defines the I_SYS_IOCTL symbol, which
1968 indicates to the C program that <sys/ioctl.h> exists and should
1969 be included.
1970
1971i_sysmman (i_sysmman.U):
1972 This variable conditionally defines the I_SYS_MMAN symbol, and
1973 indicates whether a C program should include <sys/mman.h>.
1974
1975i_sysmount (i_sysmount.U):
1976 This variable conditionally defines the I_SYSMOUNT symbol,
1977 and indicates whether a C program should include <sys/mount.h>.
1978
1979i_sysndir (i_sysndir.U):
1980 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
1981 whether a C program should include <sys/ndir.h>.
1982
1983i_sysparam (i_sysparam.U):
1984 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
1985 whether a C program should include <sys/param.h>.
1986
1987i_sysresrc (i_sysresrc.U):
1988 This variable conditionally defines the I_SYS_RESOURCE symbol,
1989 and indicates whether a C program should include <sys/resource.h>.
1990
1991i_syssecrt (i_syssecrt.U):
1992 This variable conditionally defines the I_SYS_SECURITY symbol,
1993 and indicates whether a C program should include <sys/security.h>.
1994
1995i_sysselct (i_sysselct.U):
1996 This variable conditionally defines I_SYS_SELECT, which indicates
1997 to the C program that it should include <sys/select.h> in order to
1998 get the definition of struct timeval.
1999
2000i_syssockio (i_sysioctl.U):
2001 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2002 C program that socket ioctl codes may be found in <sys/sockio.h>
2003 instead of <sys/ioctl.h>.
2004
2005i_sysstat (i_sysstat.U):
2006 This variable conditionally defines the I_SYS_STAT symbol,
2007 and indicates whether a C program should include <sys/stat.h>.
2008
2009i_sysstatvfs (i_sysstatvfs.U):
2010 This variable conditionally defines the I_SYSSTATVFS symbol,
2011 and indicates whether a C program should include <sys/statvfs.h>.
2012
2013i_systime (i_time.U):
2014 This variable conditionally defines I_SYS_TIME, which indicates
2015 to the C program that it should include <sys/time.h>.
2016
2017i_systimek (i_time.U):
2018 This variable conditionally defines I_SYS_TIME_KERNEL, which
2019 indicates to the C program that it should include <sys/time.h>
2020 with KERNEL defined.
2021
2022i_systimes (i_systimes.U):
2023 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2024 whether a C program should include <sys/times.h>.
2025
2026i_systypes (i_systypes.U):
2027 This variable conditionally defines the I_SYS_TYPES symbol,
2028 and indicates whether a C program should include <sys/types.h>.
2029
2030i_sysuio (i_sysuio.U):
2031 This variable conditionally defines the I_SYSUIO symbol, and indicates
2032 whether a C program should include <sys/uio.h>.
2033
2034i_sysun (i_sysun.U):
2035 This variable conditionally defines I_SYS_UN, which indicates
2036 to the C program that it should include <sys/un.h> to get UNIX
2037 domain socket definitions.
2038
2039i_syswait (i_syswait.U):
2040 This variable conditionally defines I_SYS_WAIT, which indicates
2041 to the C program that it should include <sys/wait.h>.
2042
2043i_termio (i_termio.U):
2044 This variable conditionally defines the I_TERMIO symbol, which
2045 indicates to the C program that it should include <termio.h> rather
2046 than <sgtty.h>.
2047
2048i_termios (i_termio.U):
2049 This variable conditionally defines the I_TERMIOS symbol, which
2050 indicates to the C program that the POSIX <termios.h> file is
2051 to be included.
2052
2053i_time (i_time.U):
2054 This variable conditionally defines I_TIME, which indicates
2055 to the C program that it should include <time.h>.
2056
2057i_unistd (i_unistd.U):
2058 This variable conditionally defines the I_UNISTD symbol, and indicates
2059 whether a C program should include <unistd.h>.
2060
2061i_utime (i_utime.U):
2062 This variable conditionally defines the I_UTIME symbol, and indicates
2063 whether a C program should include <utime.h>.
2064
2065i_values (i_values.U):
2066 This variable conditionally defines the I_VALUES symbol, and indicates
2067 whether a C program may include <values.h> to get symbols like MAXLONG
2068 and friends.
2069
2070i_varargs (i_varhdr.U):
2071 This variable conditionally defines I_VARARGS, which indicates
2072 to the C program that it should include <varargs.h>.
2073
2074i_varhdr (i_varhdr.U):
2075 Contains the name of the header to be included to get va_dcl definition.
2076 Typically one of varargs.h or stdarg.h.
2077
2078i_vfork (i_vfork.U):
2079 This variable conditionally defines the I_VFORK symbol, and indicates
2080 whether a C program should include vfork.h.
2081
2082ignore_versioned_solibs (libs.U):
2083 This variable should be non-empty if non-versioned shared
2084 libraries (libfoo.so.x.y) are to be ignored (because they
2085 cannot be linked against).
2086
2087incpath (usrinc.U):
2088 This variable must preceed the normal include path to get hte
2089 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2090 Value can be "" or "/bsd43" on mips.
2091
2092inews (Loc.U):
2093 This variable is defined but not used by Configure.
2094 The value is a plain '' and is not useful.
2095
2096installarchlib (archlib.U):
2097 This variable is really the same as archlibexp but may differ on
2098 those systems using AFS. For extra portability, only this variable
2099 should be used in makefiles.
2100
2101installbin (bin.U):
2102 This variable is the same as binexp unless AFS is running in which case
2103 the user is explicitely prompted for it. This variable should always
2104 be used in your makefiles for maximum portability.
2105
2106installman1dir (man1dir.U):
2107 This variable is really the same as man1direxp, unless you are using
2108 AFS in which case it points to the read/write location whereas
2109 man1direxp only points to the read-only access location. For extra
2110 portability, you should only use this variable within your makefiles.
2111
2112installman3dir (man3dir.U):
2113 This variable is really the same as man3direxp, unless you are using
2114 AFS in which case it points to the read/write location whereas
2115 man3direxp only points to the read-only access location. For extra
2116 portability, you should only use this variable within your makefiles.
2117
2118installprefix (installprefix.U):
2119 This variable holds the name of the directory below which
2120 "make install" will install the package. For most users, this
2121 is the same as prefix. However, it is useful for
2122 installing the software into a different (usually temporary)
2123 location after which it can be bundled up and moved somehow
2124 to the final location specified by prefix.
2125
2126installprefixexp (installprefix.U):
2127 This variable holds the full absolute path of installprefix
2128 with all ~-expansion done.
2129
2130installprivlib (privlib.U):
2131 This variable is really the same as privlibexp but may differ on
2132 those systems using AFS. For extra portability, only this variable
2133 should be used in makefiles.
2134
2135installscript (scriptdir.U):
2136 This variable is usually the same as scriptdirexp, unless you are on
2137 a system running AFS, in which case they may differ slightly. You
2138 should always use this variable within your makefiles for portability.
2139
2140installsitearch (sitearch.U):
2141 This variable is really the same as sitearchexp but may differ on
2142 those systems using AFS. For extra portability, only this variable
2143 should be used in makefiles.
2144
2145installsitelib (sitelib.U):
2146 This variable is really the same as sitelibexp but may differ on
2147 those systems using AFS. For extra portability, only this variable
2148 should be used in makefiles.
2149
2150installstyle (installstyle.U):
2151 This variable describes the "style" of the perl installation.
2152 This is intended to be useful for tools that need to
2153 manipulate entire perl distributions. Perl itself doesn't use
2154 this to find its libraries -- the library directories are
2155 stored directly in Config.pm. Currently, there are only two
2156 styles: "lib" and "lib/perl5". The default library locations
2157 (e.g. privlib, sitelib) are either $prefix/lib or
2158 $prefix/lib/perl5. The former is useful if $prefix is a
2159 directory dedicated to perl (e.g. /opt/perl), while the latter
2160 is useful if $prefix is shared by many packages, e.g. if
2161 $prefix=/usr/local.
2162 This may later be extended to include other information, so
2163 be careful with pattern-matching on the results.
2164 For compatibility with perl5.005 and earlier, the default
2165 setting is based on whether or not $prefix contains the string
2166 "perl".
2167
2168installusrbinperl (instubperl.U):
2169 This variable tells whether Perl should be installed also as
2170 /usr/bin/perl in addition to
2171 $installbin/perl
2172
2173intsize (intsize.U):
2174 This variable contains the value of the INTSIZE symbol, which
2175 indicates to the C program how many bytes there are in an int.
2176
2177known_extensions (Extensions.U):
2178 This variable holds a list of all XS extensions included in
2179 the package.
2180
2181ksh (Loc.U):
2182 This variable is defined but not used by Configure.
2183 The value is a plain '' and is not useful.
2184
2185large (models.U):
2186 This variable contains a flag which will tell the C compiler and loader
2187 to produce a program running with a large memory model. It is up to
2188 the Makefile to use this.
2189
2190ld (dlsrc.U):
2191 This variable indicates the program to be used to link
2192 libraries for dynamic loading. On some systems, it is 'ld'.
2193 On ELF systems, it should be $cc. Mostly, we'll try to respect
2194 the hint file setting.
2195
2196lddlflags (dlsrc.U):
2197 This variable contains any special flags that might need to be
2198 passed to $ld to create a shared library suitable for dynamic
2199 loading. It is up to the makefile to use it. For hpux, it
2200 should be '-b'. For sunos 4.1, it is empty.
2201
2202ldflags (ccflags.U):
2203 This variable contains any additional C loader flags desired by
2204 the user. It is up to the Makefile to use this.
2205
2206ldlibpthname (libperl.U):
2207 This variable holds the name of the shared library
2208 search path, often LD_LIBRARY_PATH. To get an empty
2209 string, the hints file must set this to 'none'.
2210
2211less (Loc.U):
2212 This variable is be used internally by Configure to determine the
2213 full pathname (if any) of the less program. After Configure runs,
2214 the value is reset to a plain "less" and is not useful.
2215
2216lib_ext (Unix.U):
2217 This is an old synonym for _a.
2218
2219libc (libc.U):
2220 This variable contains the location of the C library.
2221
2222libperl (libperl.U):
2223 The perl executable is obtained by linking perlmain.c with
2224 libperl, any static extensions (usually just DynaLoader),
2225 and any other libraries needed on this system. libperl
2226 is usually libperl.a, but can also be libperl.so.xxx if
2227 the user wishes to build a perl executable with a shared
2228 library.
2229
2230libpth (libpth.U):
2231 This variable holds the general path (space-separated) used to find
2232 libraries. It is intended to be used by other units.
2233
2234libs (libs.U):
2235 This variable holds the additional libraries we want to use.
2236 It is up to the Makefile to deal with it.
2237
2238libswanted (Myinit.U):
2239 This variable holds a list of all the libraries we want to
2240 search. The order is chosen to pick up the c library
2241 ahead of ucb or bsd libraries for SVR4.
2242
2243line (Loc.U):
2244 This variable is defined but not used by Configure.
2245 The value is a plain '' and is not useful.
2246
2247lint (Loc.U):
2248 This variable is defined but not used by Configure.
2249 The value is a plain '' and is not useful.
2250
2251lkflags (ccflags.U):
2252 This variable contains any additional C partial linker flags desired by
2253 the user. It is up to the Makefile to use this.
2254
2255ln (Loc.U):
2256 This variable is be used internally by Configure to determine the
2257 full pathname (if any) of the ln program. After Configure runs,
2258 the value is reset to a plain "ln" and is not useful.
2259
2260lns (lns.U):
2261 This variable holds the name of the command to make
2262 symbolic links (if they are supported). It can be used
2263 in the Makefile. It is either 'ln -s' or 'ln'
2264
2265locincpth (ccflags.U):
2266 This variable contains a list of additional directories to be
2267 searched by the compiler. The appropriate '-I' directives will
2268 be added to ccflags. This is intended to simplify setting
2269 local directories from the Configure command line.
2270 It's not much, but it parallels the loclibpth stuff in libpth.U.
2271
2272loclibpth (libpth.U):
2273 This variable holds the paths (space-separated) used to find local
2274 libraries. It is prepended to libpth, and is intended to be easily
2275 set from the command line.
2276
2277longdblsize (d_longdbl.U):
2278 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2279 indicates to the C program how many bytes there are in a long double,
2280 if this system supports long doubles.
2281
2282longlongsize (d_longlong.U):
2283 This variable contains the value of the LONGLONGSIZE symbol, which
2284 indicates to the C program how many bytes there are in a long long,
2285 if this system supports long long.
2286
2287longsize (intsize.U):
2288 This variable contains the value of the LONGSIZE symbol, which
2289 indicates to the C program how many bytes there are in a long.
2290
2291lp (Loc.U):
2292 This variable is defined but not used by Configure.
2293 The value is a plain '' and is not useful.
2294
2295lpr (Loc.U):
2296 This variable is defined but not used by Configure.
2297 The value is a plain '' and is not useful.
2298
2299ls (Loc.U):
2300 This variable is be used internally by Configure to determine the
2301 full pathname (if any) of the ls program. After Configure runs,
2302 the value is reset to a plain "ls" and is not useful.
2303
2304lseeksize (lseektype.U):
2305 This variable defines lseektype to be something like off_t, long,
2306 or whatever type is used to declare lseek offset's type in the
2307 kernel (which also appears to be lseek's return type).
2308
2309lseektype (lseektype.U):
2310 This variable defines lseektype to be something like off_t, long,
2311 or whatever type is used to declare lseek offset's type in the
2312 kernel (which also appears to be lseek's return type).
2313
2314mail (Loc.U):
2315 This variable is defined but not used by Configure.
2316 The value is a plain '' and is not useful.
2317
2318mailx (Loc.U):
2319 This variable is defined but not used by Configure.
2320 The value is a plain '' and is not useful.
2321
2322make (Loc.U):
2323 This variable is be used internally by Configure to determine the
2324 full pathname (if any) of the make program. After Configure runs,
2325 the value is reset to a plain "make" and is not useful.
2326
2327make_set_make (make.U):
2328 Some versions of 'make' set the variable MAKE. Others do not.
2329 This variable contains the string to be included in Makefile.SH
2330 so that MAKE is set if needed, and not if not needed.
2331 Possible values are:
2332 make_set_make='#' # If your make program handles this for you,
2333 make_set_make="MAKE=$make" # if it doesn't.
2334 I used a comment character so that we can distinguish a
2335 'set' value (from a previous config.sh or Configure '-D' option)
2336 from an uncomputed value.
2337
2338mallocobj (mallocsrc.U):
2339 This variable contains the name of the malloc.o that this package
2340 generates, if that malloc.o is preferred over the system malloc.
2341 Otherwise the value is null. This variable is intended for generating
2342 Makefiles. See mallocsrc.
2343
2344mallocsrc (mallocsrc.U):
2345 This variable contains the name of the malloc.c that comes with
2346 the package, if that malloc.c is preferred over the system malloc.
2347 Otherwise the value is null. This variable is intended for generating
2348 Makefiles.
2349
2350malloctype (mallocsrc.U):
2351 This variable contains the kind of ptr returned by malloc and realloc.
2352
2353man1dir (man1dir.U):
2354 This variable contains the name of the directory in which manual
2355 source pages are to be put. It is the responsibility of the
2356 Makefile.SH to get the value of this into the proper command.
2357 You must be prepared to do the ~name expansion yourself.
2358
2359man1direxp (man1dir.U):
2360 This variable is the same as the man1dir variable, but is filename
2361 expanded at configuration time, for convenient use in makefiles.
2362
2363man1ext (man1dir.U):
2364 This variable contains the extension that the manual page should
2365 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2366 See man1dir.
2367
2368man3dir (man3dir.U):
2369 This variable contains the name of the directory in which manual
2370 source pages are to be put. It is the responsibility of the
2371 Makefile.SH to get the value of this into the proper command.
2372 You must be prepared to do the ~name expansion yourself.
2373
2374man3direxp (man3dir.U):
2375 This variable is the same as the man3dir variable, but is filename
2376 expanded at configuration time, for convenient use in makefiles.
2377
2378man3ext (man3dir.U):
2379 This variable contains the extension that the manual page should
2380 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2381 See man3dir.
2382
2383Mcc (Loc.U):
2384 This variable is be used internally by Configure to determine the
2385 full pathname (if any) of the Mcc program. After Configure runs,
2386 the value is reset to a plain "Mcc" and is not useful.
2387
2388medium (models.U):
2389 This variable contains a flag which will tell the C compiler and loader
2390 to produce a program running with a medium memory model. If the
2391 medium model is not supported, contains the flag to produce large
2392 model programs. It is up to the Makefile to use this.
2393
2394mips_type (usrinc.U):
2395 This variable holds the environment type for the mips system.
2396 Possible values are "BSD 4.3" and "System V".
2397
2398mkdir (Loc.U):
2399 This variable is be used internally by Configure to determine the
2400 full pathname (if any) of the mkdir program. After Configure runs,
2401 the value is reset to a plain "mkdir" and is not useful.
2402
2403mmaptype (d_mmap.U):
2404 This symbol contains the type of pointer returned by mmap()
2405 (and simultaneously the type of the first argument).
2406 It can be 'void *' or 'caddr_t'.
2407
2408models (models.U):
2409 This variable contains the list of memory models supported by this
2410 system. Possible component values are none, split, unsplit, small,
2411 medium, large, and huge. The component values are space separated.
2412
2413modetype (modetype.U):
2414 This variable defines modetype to be something like mode_t,
2415 int, unsigned short, or whatever type is used to declare file
2416 modes for system calls.
2417
2418more (Loc.U):
2419 This variable is be used internally by Configure to determine the
2420 full pathname (if any) of the more program. After Configure runs,
2421 the value is reset to a plain "more" and is not useful.
2422
2423multiarch (multiarch.U):
2424 This variable conditionally defines the MULTIARCH symbol
2425 which signifies the presence of multiplatform files.
2426 This is normally set by hints files.
2427
2428mv (Loc.U):
2429 This variable is defined but not used by Configure.
2430 The value is a plain '' and is not useful.
2431
2432myarchname (archname.U):
2433 This variable holds the architecture name computed by Configure in
2434 a previous run. It is not intended to be perused by any user and
2435 should never be set in a hint file.
2436
2437mydomain (myhostname.U):
2438 This variable contains the eventual value of the MYDOMAIN symbol,
2439 which is the domain of the host the program is going to run on.
2440 The domain must be appended to myhostname to form a complete host name.
2441 The dot comes with mydomain, and need not be supplied by the program.
2442
2443myhostname (myhostname.U):
2444 This variable contains the eventual value of the MYHOSTNAME symbol,
2445 which is the name of the host the program is going to run on.
2446 The domain is not kept with hostname, but must be gotten from mydomain.
2447 The dot comes with mydomain, and need not be supplied by the program.
2448
2449myuname (Oldconfig.U):
2450 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2451 pseudo variables assignments in the output are stripped, thank you. The
2452 whole thing is then lower-cased.
2453
2454n (n.U):
2455 This variable contains the '-n' flag if that is what causes the echo
2456 command to suppress newline. Otherwise it is null. Correct usage is
2457 $echo $n "prompt for a question: $c".
2458
2459netdb_hlen_type (netdbtype.U):
2460 This variable holds the type used for the 2nd argument to
2461 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2462 This is only useful if you have gethostbyaddr(), naturally.
2463
2464netdb_host_type (netdbtype.U):
2465 This variable holds the type used for the 1st argument to
2466 gethostbyaddr(). Usually, this is char * or void *, possibly
2467 with or without a const prefix.
2468 This is only useful if you have gethostbyaddr(), naturally.
2469
2470netdb_name_type (netdbtype.U):
2471 This variable holds the type used for the argument to
2472 gethostbyname(). Usually, this is char * or const char *.
2473 This is only useful if you have gethostbyname(), naturally.
2474
2475netdb_net_type (netdbtype.U):
2476 This variable holds the type used for the 1st argument to
2477 getnetbyaddr(). Usually, this is int or long.
2478 This is only useful if you have getnetbyaddr(), naturally.
2479
2480nm (Loc.U):
2481 This variable is be used internally by Configure to determine the
2482 full pathname (if any) of the nm program. After Configure runs,
2483 the value is reset to a plain "nm" and is not useful.
2484
2485nm_opt (usenm.U):
2486 This variable holds the options that may be necessary for nm.
2487
2488nm_so_opt (usenm.U):
2489 This variable holds the options that may be necessary for nm
2490 to work on a shared library but that can not be used on an
2491 archive library. Currently, this is only used by Linux, where
2492 nm --dynamic is *required* to get symbols from an ELF library which
2493 has been stripped, but nm --dynamic is *fatal* on an archive library.
2494 Maybe Linux should just always set usenm=false.
2495
2496nonxs_ext (Extensions.U):
2497 This variable holds a list of all non-xs extensions included
2498 in the package. All of them will be built.
2499
2500nroff (Loc.U):
2501 This variable is be used internally by Configure to determine the
2502 full pathname (if any) of the nroff program. After Configure runs,
2503 the value is reset to a plain "nroff" and is not useful.
2504
2505o_nonblock (nblock_io.U):
2506 This variable bears the symbol value to be used during open() or fcntl()
2507 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2508 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2509 but that is only supported by some devices.
2510
2511obj_ext (Unix.U):
2512 This is an old synonym for _o.
2513
2514old_pthread_create_joinable (d_pthrattrj.U):
2515 This variable defines the constant to use for creating joinable
2516 (aka undetached) pthreads. Unused if pthread.h defines
2517 PTHREAD_CREATE_JOINABLE. If used, possible values are
2518 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2519
2520optimize (ccflags.U):
2521 This variable contains any optimizer/debugger flag that should be used.
2522 It is up to the Makefile to use it.
2523
2524orderlib (orderlib.U):
2525 This variable is "true" if the components of libraries must be ordered
2526 (with `lorder $* | tsort`) before placing them in an archive. Set to
2527 "false" if ranlib or ar can generate random libraries.
2528
2529osname (Oldconfig.U):
2530 This variable contains the operating system name (e.g. sunos,
2531 solaris, hpux, etc.). It can be useful later on for setting
2532 defaults. Any spaces are replaced with underscores. It is set
2533 to a null string if we can't figure it out.
2534
2535osvers (Oldconfig.U):
2536 This variable contains the operating system version (e.g.
2537 4.1.3, 5.2, etc.). It is primarily used for helping select
2538 an appropriate hints file, but might be useful elsewhere for
2539 setting defaults. It is set to '' if we can't figure it out.
2540 We try to be flexible about how much of the version number
2541 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2542 same for this package, hints files might just be os_4.0 or
2543 os_4.1, etc., not keeping separate files for each little release.
2544
2545package (package.U):
2546 This variable contains the name of the package being constructed.
2547 It is primarily intended for the use of later Configure units.
2548
2549pager (pager.U):
2550 This variable contains the name of the preferred pager on the system.
2551 Usual values are (the full pathnames of) more, less, pg, or cat.
2552
2553passcat (nis.U):
2554 This variable contains a command that produces the text of the
2555 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2556 "ypcat passwd" when NIS is used.
2557
2558patchlevel (patchlevel.U):
2559 The patchlevel level of this package.
2560 The value of patchlevel comes from the patchlevel.h file.
2561
2562path_sep (Unix.U):
2563 This is an old synonym for p_ in Head.U, the character
2564 used to separate elements in the command shell search PATH.
2565
2566perl (Loc.U):
2567 This variable is defined but not used by Configure.
2568 The value is a plain '' and is not useful.
2569
2570perladmin (perladmin.U):
2571 Electronic mail address of the perl5 administrator.
2572
2573perlpath (perlpath.U):
2574 This variable contains the eventual value of the PERLPATH symbol,
2575 which contains the name of the perl interpreter to be used in
2576 shell scripts and in the "eval 'exec'" idiom.
2577
2578pg (Loc.U):
2579 This variable is be used internally by Configure to determine the
2580 full pathname (if any) of the pg program. After Configure runs,
2581 the value is reset to a plain "pg" and is not useful.
2582
2583phostname (myhostname.U):
2584 This variable contains the eventual value of the PHOSTNAME symbol,
2585 which is a command that can be fed to popen() to get the host name.
2586 The program should probably not presume that the domain is or isn't
2587 there already.
2588
2589pidtype (pidtype.U):
2590 This variable defines PIDTYPE to be something like pid_t, int,
2591 ushort, or whatever type is used to declare process ids in the kernel.
2592
2593plibpth (libpth.U):
2594 Holds the private path used by Configure to find out the libraries.
2595 Its value is prepend to libpth. This variable takes care of special
2596 machines, like the mips. Usually, it should be empty.
2597
2598pmake (Loc.U):
2599 This variable is defined but not used by Configure.
2600 The value is a plain '' and is not useful.
2601
2602pr (Loc.U):
2603 This variable is defined but not used by Configure.
2604 The value is a plain '' and is not useful.
2605
2606prefix (prefix.U):
2607 This variable holds the name of the directory below which the
2608 user will install the package. Usually, this is /usr/local, and
2609 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2610 man pages in /usr/local/man, etc. It is only used to set defaults
2611 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2612
2613prefixexp (prefix.U):
2614 This variable holds the full absolute path of the directory below
2615 which the user will install the package. Derived from prefix.
2616
2617privlib (privlib.U):
2618 This variable contains the eventual value of the PRIVLIB symbol,
2619 which is the name of the private library for this package. It may
2620 have a ~ on the front. It is up to the makefile to eventually create
2621 this directory while performing installation (with ~ substitution).
2622
2623privlibexp (privlib.U):
2624 This variable is the ~name expanded version of privlib, so that you
2625 may use it directly in Makefiles or shell scripts.
2626
2627prototype (prototype.U):
2628 This variable holds the eventual value of CAN_PROTOTYPE, which
2629 indicates the C compiler can handle funciton prototypes.
2630
2631ptrsize (ptrsize.U):
2632 This variable contains the value of the PTRSIZE symbol, which
2633 indicates to the C program how many bytes there are in a pointer.
2634
2635randbits (randfunc.U):
2636 Indicates how many bits are produced by the function used to
2637 generate normalized random numbers.
2638
2639randfunc (randfunc.U):
2640 Indicates the name of the random number function to use.
2641 Values include drand48, random, and rand. In C programs,
2642 the 'Drand01' macro is defined to generate uniformly distributed
2643 random numbers over the range [0., 1.[ (see drand01 and nrand).
2644
2645randseedtype (randfunc.U):
2646 Indicates the type of the argument of the seedfunc.
2647
2648ranlib (orderlib.U):
2649 This variable is set to the pathname of the ranlib program, if it is
2650 needed to generate random libraries. Set to ":" if ar can generate
2651 random libraries or if random libraries are not supported
2652
2653rd_nodata (nblock_io.U):
2654 This variable holds the return code from read() when no data is
2655 present. It should be -1, but some systems return 0 when O_NDELAY is
2656 used, which is a shame because you cannot make the difference between
2657 no data and an EOF.. Sigh!
2658
2659rm (Loc.U):
2660 This variable is be used internally by Configure to determine the
2661 full pathname (if any) of the rm program. After Configure runs,
2662 the value is reset to a plain "rm" and is not useful.
2663
2664rmail (Loc.U):
2665 This variable is defined but not used by Configure.
2666 The value is a plain '' and is not useful.
2667
2668runnm (usenm.U):
2669 This variable contains 'true' or 'false' depending whether the
2670 nm extraction should be performed or not, according to the value
2671 of usenm and the flags on the Configure command line.
2672
2673sched_yield (d_pthread_y.U):
2674 This variable defines the way to yield the execution
2675 of the current thread.
2676
2677scriptdir (scriptdir.U):
2678 This variable holds the name of the directory in which the user wants
2679 to put publicly scripts for the package in question. It is either
2680 the same directory as for binaries, or a special one that can be
2681 mounted across different architectures, like /usr/share. Programs
2682 must be prepared to deal with ~name expansion.
2683
2684scriptdirexp (scriptdir.U):
2685 This variable is the same as scriptdir, but is filename expanded
2686 at configuration time, for programs not wanting to bother with it.
2687
2688sed (Loc.U):
2689 This variable is be used internally by Configure to determine the
2690 full pathname (if any) of the sed program. After Configure runs,
2691 the value is reset to a plain "sed" and is not useful.
2692
2693seedfunc (randfunc.U):
2694 Indicates the random number generating seed function.
2695 Values include srand48, srandom, and srand.
2696
2697selectminbits (selectminbits.U):
2698 This variable holds the minimum number of bits operated by select.
2699 That is, if you do select(n, ...), how many bits at least will be
2700 cleared in the masks if some activity is detected. Usually this
2701 is either n or 32*ceil(n/32), especially many little-endians do
2702 the latter. This is only useful if you have select(), naturally.
2703
2704selecttype (selecttype.U):
2705 This variable holds the type used for the 2nd, 3rd, and 4th
2706 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2707 is defined, and 'int *' otherwise. This is only useful if you
2708 have select(), naturally.
2709
2710sendmail (Loc.U):
2711 This variable is defined but not used by Configure.
2712 The value is a plain '' and is not useful.
2713
2714sh (sh.U):
2715 This variable contains the full pathname of the shell used
2716 on this system to execute Bourne shell scripts. Usually, this will be
2717 /bin/sh, though it's possible that some systems will have /bin/ksh,
2718 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2719 D:/bin/sh.exe.
2720 This unit comes before Options.U, so you can't set sh with a '-D'
2721 option, though you can override this (and startsh)
2722 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2723
2724shar (Loc.U):
2725 This variable is defined but not used by Configure.
2726 The value is a plain '' and is not useful.
2727
2728sharpbang (spitshell.U):
2729 This variable contains the string #! if this system supports that
2730 construct.
2731
2732shmattype (d_shmat.U):
2733 This symbol contains the type of pointer returned by shmat().
2734 It can be 'void *' or 'char *'.
2735
2736shortsize (intsize.U):
2737 This variable contains the value of the SHORTSIZE symbol which
2738 indicates to the C program how many bytes there are in a short.
2739
2740shrpenv (libperl.U):
2741 If the user builds a shared libperl.so, then we need to tell the
2742 'perl' executable where it will be able to find the installed libperl.so.
2743 One way to do this on some systems is to set the environment variable
2744 LD_RUN_PATH to the directory that will be the final location of the
2745 shared libperl.so. The makefile can use this with something like
2746 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2747 Typical values are
2748 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2749 or
2750 shrpenv=''
2751 See the main perl Makefile.SH for actual working usage.
2752 Alternatively, we might be able to use a command line option such
2753 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2754 $archlibexp/CORE (Linux).
2755
2756shsharp (spitshell.U):
2757 This variable tells further Configure units whether your sh can
2758 handle # comments.
2759
2760sig_count (sig_name.U):
2761 This variable holds a number larger than the largest valid
2762 signal number. This is usually the same as the NSIG macro.
2763
2764sig_name (sig_name.U):
2765 This variable holds the signal names, space separated. The leading
2766 SIG in signal name is removed. A ZERO is prepended to the
2767 list. This is currently not used.
2768
2769sig_name_init (sig_name.U):
2770 This variable holds the signal names, enclosed in double quotes and
2771 separated by commas, suitable for use in the SIG_NAME definition
2772 below. A "ZERO" is prepended to the list, and the list is
2773 terminated with a plain 0. The leading SIG in signal names
2774 is removed. See sig_num.
2775
2776sig_num (sig_name.U):
2777 This variable holds the signal numbers, space separated. A ZERO is
2778 prepended to the list (corresponding to the fake SIGZERO), and
2779 the list is terminated with a 0. Those numbers correspond to
2780 the value of the signal listed in the same place within the
2781 sig_name list.
2782
2783sig_num_init (sig_name.U):
2784 This variable holds the signal numbers, enclosed in double quotes and
2785 separated by commas, suitable for use in the SIG_NUM definition
2786 below. A "ZERO" is prepended to the list, and the list is
2787 terminated with a plain 0.
2788
2789signal_t (d_voidsig.U):
2790 This variable holds the type of the signal handler (void or int).
2791
2792sitearch (sitearch.U):
2793 This variable contains the eventual value of the SITEARCH symbol,
2794 which is the name of the private library for this package. It may
2795 have a ~ on the front. It is up to the makefile to eventually create
2796 this directory while performing installation (with ~ substitution).
2797
2798sitearchexp (sitearch.U):
2799 This variable is the ~name expanded version of sitearch, so that you
2800 may use it directly in Makefiles or shell scripts.
2801
2802sitelib (sitelib.U):
2803 This variable contains the eventual value of the SITELIB symbol,
2804 which is the name of the private library for this package. It may
2805 have a ~ on the front. It is up to the makefile to eventually create
2806 this directory while performing installation (with ~ substitution).
2807
2808sitelibexp (sitelib.U):
2809 This variable is the ~name expanded version of sitelib, so that you
2810 may use it directly in Makefiles or shell scripts.
2811
2812siteprefix (siteprefix.U):
2813 This variable holds the full absolute path of the directory below
2814 which the user will install add-on packages.
2815
2816siteprefixexp (siteprefix.U):
2817 This variable holds the full absolute path of the directory below
2818 which the user will install add-on packages. Derived from siteprefix.
2819
2820sizetype (sizetype.U):
2821 This variable defines sizetype to be something like size_t,
2822 unsigned long, or whatever type is used to declare length
2823 parameters for string functions.
2824
2825sleep (Loc.U):
2826 This variable is defined but not used by Configure.
2827 The value is a plain '' and is not useful.
2828
2829smail (Loc.U):
2830 This variable is defined but not used by Configure.
2831 The value is a plain '' and is not useful.
2832
2833small (models.U):
2834 This variable contains a flag which will tell the C compiler and loader
2835 to produce a program running with a small memory model. It is up to
2836 the Makefile to use this.
2837
2838so (so.U):
2839 This variable holds the extension used to identify shared libraries
2840 (also known as shared objects) on the system. Usually set to 'so'.
2841
2842sockethdr (d_socket.U):
2843 This variable has any cpp '-I' flags needed for socket support.
2844
2845socketlib (d_socket.U):
2846 This variable has the names of any libraries needed for socket support.
2847
2848sort (Loc.U):
2849 This variable is be used internally by Configure to determine the
2850 full pathname (if any) of the sort program. After Configure runs,
2851 the value is reset to a plain "sort" and is not useful.
2852
2853spackage (package.U):
2854 This variable contains the name of the package being constructed,
2855 with the first letter uppercased, i.e. suitable for starting
2856 sentences.
2857
2858spitshell (spitshell.U):
2859 This variable contains the command necessary to spit out a runnable
2860 shell on this system. It is either cat or a grep '-v' for # comments.
2861
2862split (models.U):
2863 This variable contains a flag which will tell the C compiler and loader
2864 to produce a program that will run in separate I and D space, for those
2865 machines that support separation of instruction and data space. It is
2866 up to the Makefile to use this.
2867
2868src (src.U):
2869 This variable holds the path to the package source. It is up to
2870 the Makefile to use this variable and set VPATH accordingly to
2871 find the sources remotely.
2872
2873ssizetype (ssizetype.U):
2874 This variable defines ssizetype to be something like ssize_t,
2875 long or int. It is used by functions that return a count
2876 of bytes or an error condition. It must be a signed type.
2877 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
2878
2879startperl (startperl.U):
2880 This variable contains the string to put on the front of a perl
2881 script to make sure (hopefully) that it runs with perl and not some
2882 shell. Of course, that leading line must be followed by the classical
2883 perl idiom:
2884 eval 'exec perl -S $0 ${1+"$@"}'
2885 if $running_under_some_shell;
2886 to guarantee perl startup should the shell execute the script. Note
2887 that this magic incatation is not understood by csh.
2888
2889startsh (startsh.U):
2890 This variable contains the string to put on the front of a shell
2891 script to make sure (hopefully) that it runs with sh and not some
2892 other shell.
2893
2894static_ext (Extensions.U):
2895 This variable holds a list of XS extension files we want to
2896 link statically into the package. It is used by Makefile.
2897
2898stdchar (stdchar.U):
2899 This variable conditionally defines STDCHAR to be the type of char
2900 used in stdio.h. It has the values "unsigned char" or "char".
2901
2902stdio_base (d_stdstdio.U):
2903 This variable defines how, given a FILE pointer, fp, to access the
2904 _base field (or equivalent) of stdio.h's FILE structure. This will
2905 be used to define the macro FILE_base(fp).
2906
2907stdio_bufsiz (d_stdstdio.U):
2908 This variable defines how, given a FILE pointer, fp, to determine
2909 the number of bytes store in the I/O buffer pointer to by the
2910 _base field (or equivalent) of stdio.h's FILE structure. This will
2911 be used to define the macro FILE_bufsiz(fp).
2912
2913stdio_cnt (d_stdstdio.U):
2914 This variable defines how, given a FILE pointer, fp, to access the
2915 _cnt field (or equivalent) of stdio.h's FILE structure. This will
2916 be used to define the macro FILE_cnt(fp).
2917
2918stdio_filbuf (d_stdstdio.U):
2919 This variable defines how, given a FILE pointer, fp, to tell
2920 stdio to refill it's internal buffers (?). This will
2921 be used to define the macro FILE_filbuf(fp).
2922
2923stdio_ptr (d_stdstdio.U):
2924 This variable defines how, given a FILE pointer, fp, to access the
2925 _ptr field (or equivalent) of stdio.h's FILE structure. This will
2926 be used to define the macro FILE_ptr(fp).
2927
2928stdio_stream_array (stdio_streams.U):
2929 This variable tells the name of the array holding the stdio streams.
2930 Usual values include _iob, __iob, and __sF.
2931
2932strings (i_string.U):
2933 This variable holds the full path of the string header that will be
2934 used. Typically /usr/include/string.h or /usr/include/strings.h.
2935
2936submit (Loc.U):
2937 This variable is defined but not used by Configure.
2938 The value is a plain '' and is not useful.
2939
2940subversion (patchlevel.U):
2941 The subversion level of this package.
2942 The value of subversion comes from the patchlevel.h file.
2943 This is unique to perl.
2944
2945sysman (sysman.U):
2946 This variable holds the place where the manual is located on this
2947 system. It is not the place where the user wants to put his manual
2948 pages. Rather it is the place where Configure may look to find manual
2949 for unix commands (section 1 of the manual usually). See mansrc.
2950
2951tail (Loc.U):
2952 This variable is defined but not used by Configure.
2953 The value is a plain '' and is not useful.
2954
2955tar (Loc.U):
2956 This variable is defined but not used by Configure.
2957 The value is a plain '' and is not useful.
2958
2959tbl (Loc.U):
2960 This variable is defined but not used by Configure.
2961 The value is a plain '' and is not useful.
2962
2963tee (Loc.U):
2964 This variable is defined but not used by Configure.
2965 The value is a plain '' and is not useful.
2966
2967test (Loc.U):
2968 This variable is be used internally by Configure to determine the
2969 full pathname (if any) of the test program. After Configure runs,
2970 the value is reset to a plain "test" and is not useful.
2971
2972timeincl (i_time.U):
2973 This variable holds the full path of the included time header(s).
2974
2975timetype (d_time.U):
2976 This variable holds the type returned by time(). It can be long,
2977 or time_t on BSD sites (in which case <sys/types.h> should be
2978 included). Anyway, the type Time_t should be used.
2979
2980touch (Loc.U):
2981 This variable is be used internally by Configure to determine the
2982 full pathname (if any) of the touch program. After Configure runs,
2983 the value is reset to a plain "touch" and is not useful.
2984
2985tr (Loc.U):
2986 This variable is be used internally by Configure to determine the
2987 full pathname (if any) of the tr program. After Configure runs,
2988 the value is reset to a plain "tr" and is not useful.
2989
2990trnl (trnl.U):
2991 This variable contains the value to be passed to the tr(1)
2992 command to transliterate a newline. Typical values are
2993 '\012' and '\n'. This is needed for EBCDIC systems where
2994 newline is not necessarily '\012'.
2995
2996troff (Loc.U):
2997 This variable is defined but not used by Configure.
2998 The value is a plain '' and is not useful.
2999
3000uidtype (uidtype.U):
3001 This variable defines Uid_t to be something like uid_t, int,
3002 ushort, or whatever type is used to declare user ids in the kernel.
3003
3004uname (Loc.U):
3005 This variable is be used internally by Configure to determine the
3006 full pathname (if any) of the uname program. After Configure runs,
3007 the value is reset to a plain "uname" and is not useful.
3008
3009uniq (Loc.U):
3010 This variable is be used internally by Configure to determine the
3011 full pathname (if any) of the uniq program. After Configure runs,
3012 the value is reset to a plain "uniq" and is not useful.
3013
3014use64bits (use64bits.U):
3015 This variable conditionally defines the USE_64_BITS symbol,
3016 and indicates that explicit 64-bit interfaces should be used
3017 when available.
3018
3019usedl (dlsrc.U):
3020 This variable indicates if the the system supports dynamic
3021 loading of some sort. See also dlsrc and dlobj.
3022
3023usemultiplicity (usemultiplicity.U):
3024 This variable conditionally defines the MULTIPLICITY symbol,
3025 and indicates that Perl should be built to use multiplicity.
3026
3027usemymalloc (mallocsrc.U):
3028 This variable contains y if the malloc that comes with this package
3029 is desired over the system's version of malloc. People often include
3030 special versions of malloc for effiency, but such versions are often
3031 less portable. See also mallocsrc and mallocobj.
3032 If this is 'y', then -lmalloc is removed from $libs.
3033
3034usenm (usenm.U):
3035 This variable contains 'true' or 'false' depending whether the
3036 nm extraction is wanted or not.
3037
3038useopcode (Extensions.U):
3039 This variable holds either 'true' or 'false' to indicate
3040 whether the Opcode extension should be used. The sole
3041 use for this currently is to allow an easy mechanism
3042 for users to skip the Opcode extension from the Configure
3043 command line.
3044
3045useperlio (useperlio.U):
3046 This variable conditionally defines the USE_PERLIO symbol,
3047 and indicates that the PerlIO abstraction should be
3048 used throughout.
3049
3050useposix (Extensions.U):
3051 This variable holds either 'true' or 'false' to indicate
3052 whether the POSIX extension should be used. The sole
3053 use for this currently is to allow an easy mechanism
3054 for hints files to indicate that POSIX will not compile
3055 on a particular system.
3056
3057usesfio (d_sfio.U):
3058 This variable is set to true when the user agrees to use sfio.
3059 It is set to false when sfio is not available or when the user
3060 explicitely requests not to use sfio. It is here primarily so
3061 that command-line settings can override the auto-detection of
3062 d_sfio without running into a "WHOA THERE".
3063
3064useshrplib (libperl.U):
3065 This variable is set to 'yes' if the user wishes
3066 to build a shared libperl, and 'no' otherwise.
3067
3068usesocks (usesocks.U):
3069 This variable conditionally defines the USE_SOCKS symbol,
3070 and indicates that Perl should be built to use SOCKS.
3071
3072usethreads (usethreads.U):
3073 This variable conditionally defines the USE_THREADS symbol,
3074 and indicates that Perl should be built to use threads.
3075
3076usevfork (d_vfork.U):
3077 This variable is set to true when the user accepts to use vfork.
3078 It is set to false when no vfork is available or when the user
3079 explicitely requests not to use vfork.
3080
3081usrinc (usrinc.U):
3082 This variable holds the path of the include files, which is
3083 usually /usr/include. It is mainly used by other Configure units.
3084
3085uuname (Loc.U):
3086 This variable is defined but not used by Configure.
3087 The value is a plain '' and is not useful.
3088
3089version (patchlevel.U):
3090 The full version number of this package. This combines
3091 baserev, patchlevel, and subversion to get the full
3092 version number, including any possible subversions. Care
3093 is taken to use the C locale in order to get something
3094 like 5.004 instead of 5,004. This is unique to perl.
3095
3096vi (Loc.U):
3097 This variable is defined but not used by Configure.
3098 The value is a plain '' and is not useful.
3099
3100voidflags (voidflags.U):
3101 This variable contains the eventual value of the VOIDFLAGS symbol,
3102 which indicates how much support of the void type is given by this
3103 compiler. See VOIDFLAGS for more info.
3104
3105xlibpth (libpth.U):
3106 This variable holds extra path (space-separated) used to find
3107 libraries on this platform, for example CPU-specific libraries
3108 (on multi-CPU platforms) may be listed here.
3109
3110zcat (Loc.U):
3111 This variable is defined but not used by Configure.
3112 The value is a plain '' and is not useful.
3113
3114zip (Loc.U):
3115 This variable is be used internally by Configure to determine the
3116 full pathname (if any) of the zip program. After Configure runs,
3117 the value is reset to a plain "zip" and is not useful.
3118