Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/lcms2/m4/ax_pthread.m4 @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 # ===========================================================================
2 # https://www.gnu.org/software/autoconf-archive/ax_pthread.html
3 # ===========================================================================
4 #
5 # SYNOPSIS
6 #
7 # AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
8 #
9 # DESCRIPTION
10 #
11 # This macro figures out how to build C programs using POSIX threads. It
12 # sets the PTHREAD_LIBS output variable to the threads library and linker
13 # flags, and the PTHREAD_CFLAGS output variable to any special C compiler
14 # flags that are needed. (The user can also force certain compiler
15 # flags/libs to be tested by setting these environment variables.)
16 #
17 # Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
18 # needed for multi-threaded programs (defaults to the value of CC
19 # respectively CXX otherwise). (This is necessary on e.g. AIX to use the
20 # special cc_r/CC_r compiler alias.)
21 #
22 # NOTE: You are assumed to not only compile your program with these flags,
23 # but also to link with them as well. For example, you might link with
24 # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
25 # $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
26 #
27 # If you are only building threaded programs, you may wish to use these
28 # variables in your default LIBS, CFLAGS, and CC:
29 #
30 # LIBS="$PTHREAD_LIBS $LIBS"
31 # CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
32 # CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
33 # CC="$PTHREAD_CC"
34 # CXX="$PTHREAD_CXX"
35 #
36 # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
37 # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
38 # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
39 #
40 # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
41 # PTHREAD_PRIO_INHERIT symbol is defined when compiling with
42 # PTHREAD_CFLAGS.
43 #
44 # ACTION-IF-FOUND is a list of shell commands to run if a threads library
45 # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
46 # is not found. If ACTION-IF-FOUND is not specified, the default action
47 # will define HAVE_PTHREAD.
48 #
49 # Please let the authors know if this macro fails on any platform, or if
50 # you have any other suggestions or comments. This macro was based on work
51 # by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
52 # from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
53 # Alejandro Forero Cuervo to the autoconf macro repository. We are also
54 # grateful for the helpful feedback of numerous users.
55 #
56 # Updated for Autoconf 2.68 by Daniel Richard G.
57 #
58 # LICENSE
59 #
60 # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
61 # Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
62 # Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
63 #
64 # This program is free software: you can redistribute it and/or modify it
65 # under the terms of the GNU General Public License as published by the
66 # Free Software Foundation, either version 3 of the License, or (at your
67 # option) any later version.
68 #
69 # This program is distributed in the hope that it will be useful, but
70 # WITHOUT ANY WARRANTY; without even the implied warranty of
71 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
72 # Public License for more details.
73 #
74 # You should have received a copy of the GNU General Public License along
75 # with this program. If not, see <https://www.gnu.org/licenses/>.
76 #
77 # As a special exception, the respective Autoconf Macro's copyright owner
78 # gives unlimited permission to copy, distribute and modify the configure
79 # scripts that are the output of Autoconf when processing the Macro. You
80 # need not follow the terms of the GNU General Public License when using
81 # or distributing such scripts, even though portions of the text of the
82 # Macro appear in them. The GNU General Public License (GPL) does govern
83 # all other use of the material that constitutes the Autoconf Macro.
84 #
85 # This special exception to the GPL applies to versions of the Autoconf
86 # Macro released by the Autoconf Archive. When you make and distribute a
87 # modified version of the Autoconf Macro, you may extend this special
88 # exception to the GPL to apply to your modified version as well.
89
90 #serial 31
91
92 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
93 AC_DEFUN([AX_PTHREAD], [
94 AC_REQUIRE([AC_CANONICAL_HOST])
95 AC_REQUIRE([AC_PROG_CC])
96 AC_REQUIRE([AC_PROG_SED])
97 AC_LANG_PUSH([C])
98 ax_pthread_ok=no
99
100 # We used to check for pthread.h first, but this fails if pthread.h
101 # requires special compiler flags (e.g. on Tru64 or Sequent).
102 # It gets checked for in the link test anyway.
103
104 # First of all, check if the user has set any of the PTHREAD_LIBS,
105 # etcetera environment variables, and if threads linking works using
106 # them:
107 if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
108 ax_pthread_save_CC="$CC"
109 ax_pthread_save_CFLAGS="$CFLAGS"
110 ax_pthread_save_LIBS="$LIBS"
111 AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
112 AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
113 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
114 LIBS="$PTHREAD_LIBS $LIBS"
115 AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
116 AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
117 AC_MSG_RESULT([$ax_pthread_ok])
118 if test "x$ax_pthread_ok" = "xno"; then
119 PTHREAD_LIBS=""
120 PTHREAD_CFLAGS=""
121 fi
122 CC="$ax_pthread_save_CC"
123 CFLAGS="$ax_pthread_save_CFLAGS"
124 LIBS="$ax_pthread_save_LIBS"
125 fi
126
127 # We must check for the threads library under a number of different
128 # names; the ordering is very important because some systems
129 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
130 # libraries is broken (non-POSIX).
131
132 # Create a list of thread flags to try. Items with a "," contain both
133 # C compiler flags (before ",") and linker flags (after ","). Other items
134 # starting with a "-" are C compiler flags, and remaining items are
135 # library names, except for "none" which indicates that we try without
136 # any flags at all, and "pthread-config" which is a program returning
137 # the flags for the Pth emulation library.
138
139 ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
140
141 # The ordering *is* (sometimes) important. Some notes on the
142 # individual items follow:
143
144 # pthreads: AIX (must check this before -lpthread)
145 # none: in case threads are in libc; should be tried before -Kthread and
146 # other compiler flags to prevent continual compiler warnings
147 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
148 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
149 # (Note: HP C rejects this with "bad form for `-t' option")
150 # -pthreads: Solaris/gcc (Note: HP C also rejects)
151 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
152 # doesn't hurt to check since this sometimes defines pthreads and
153 # -D_REENTRANT too), HP C (must be checked before -lpthread, which
154 # is present but should not be used directly; and before -mthreads,
155 # because the compiler interprets this as "-mt" + "-hreads")
156 # -mthreads: Mingw32/gcc, Lynx/gcc
157 # pthread: Linux, etcetera
158 # --thread-safe: KAI C++
159 # pthread-config: use pthread-config program (for GNU Pth library)
160
161 case $host_os in
162
163 freebsd*)
164
165 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
166 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
167
168 ax_pthread_flags="-kthread lthread $ax_pthread_flags"
169 ;;
170
171 hpux*)
172
173 # From the cc(1) man page: "[-mt] Sets various -D flags to enable
174 # multi-threading and also sets -lpthread."
175
176 ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
177 ;;
178
179 openedition*)
180
181 # IBM z/OS requires a feature-test macro to be defined in order to
182 # enable POSIX threads at all, so give the user a hint if this is
183 # not set. (We don't define these ourselves, as they can affect
184 # other portions of the system API in unpredictable ways.)
185
186 AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
187 [
188 # if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
189 AX_PTHREAD_ZOS_MISSING
190 # endif
191 ],
192 [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
193 ;;
194
195 solaris*)
196
197 # On Solaris (at least, for some versions), libc contains stubbed
198 # (non-functional) versions of the pthreads routines, so link-based
199 # tests will erroneously succeed. (N.B.: The stubs are missing
200 # pthread_cleanup_push, or rather a function called by this macro,
201 # so we could check for that, but who knows whether they'll stub
202 # that too in a future libc.) So we'll check first for the
203 # standard Solaris way of linking pthreads (-mt -lpthread).
204
205 ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
206 ;;
207 esac
208
209 # Are we compiling with Clang?
210
211 AC_CACHE_CHECK([whether $CC is Clang],
212 [ax_cv_PTHREAD_CLANG],
213 [ax_cv_PTHREAD_CLANG=no
214 # Note that Autoconf sets GCC=yes for Clang as well as GCC
215 if test "x$GCC" = "xyes"; then
216 AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
217 [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
218 # if defined(__clang__) && defined(__llvm__)
219 AX_PTHREAD_CC_IS_CLANG
220 # endif
221 ],
222 [ax_cv_PTHREAD_CLANG=yes])
223 fi
224 ])
225 ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
226
227
228 # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
229
230 # Note that for GCC and Clang -pthread generally implies -lpthread,
231 # except when -nostdlib is passed.
232 # This is problematic using libtool to build C++ shared libraries with pthread:
233 # [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
234 # [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
235 # [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
236 # To solve this, first try -pthread together with -lpthread for GCC
237
238 AS_IF([test "x$GCC" = "xyes"],
239 [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
240
241 # Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
242
243 AS_IF([test "x$ax_pthread_clang" = "xyes"],
244 [ax_pthread_flags="-pthread,-lpthread -pthread"])
245
246
247 # The presence of a feature test macro requesting re-entrant function
248 # definitions is, on some systems, a strong hint that pthreads support is
249 # correctly enabled
250
251 case $host_os in
252 darwin* | hpux* | linux* | osf* | solaris*)
253 ax_pthread_check_macro="_REENTRANT"
254 ;;
255
256 aix*)
257 ax_pthread_check_macro="_THREAD_SAFE"
258 ;;
259
260 *)
261 ax_pthread_check_macro="--"
262 ;;
263 esac
264 AS_IF([test "x$ax_pthread_check_macro" = "x--"],
265 [ax_pthread_check_cond=0],
266 [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
267
268
269 if test "x$ax_pthread_ok" = "xno"; then
270 for ax_pthread_try_flag in $ax_pthread_flags; do
271
272 case $ax_pthread_try_flag in
273 none)
274 AC_MSG_CHECKING([whether pthreads work without any flags])
275 ;;
276
277 *,*)
278 PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
279 PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
280 AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
281 ;;
282
283 -*)
284 AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
285 PTHREAD_CFLAGS="$ax_pthread_try_flag"
286 ;;
287
288 pthread-config)
289 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
290 AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
291 PTHREAD_CFLAGS="`pthread-config --cflags`"
292 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
293 ;;
294
295 *)
296 AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
297 PTHREAD_LIBS="-l$ax_pthread_try_flag"
298 ;;
299 esac
300
301 ax_pthread_save_CFLAGS="$CFLAGS"
302 ax_pthread_save_LIBS="$LIBS"
303 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
304 LIBS="$PTHREAD_LIBS $LIBS"
305
306 # Check for various functions. We must include pthread.h,
307 # since some functions may be macros. (On the Sequent, we
308 # need a special flag -Kthread to make this header compile.)
309 # We check for pthread_join because it is in -lpthread on IRIX
310 # while pthread_create is in libc. We check for pthread_attr_init
311 # due to DEC craziness with -lpthreads. We check for
312 # pthread_cleanup_push because it is one of the few pthread
313 # functions on Solaris that doesn't have a non-functional libc stub.
314 # We try pthread_create on general principles.
315
316 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
317 # if $ax_pthread_check_cond
318 # error "$ax_pthread_check_macro must be defined"
319 # endif
320 static void *some_global = NULL;
321 static void routine(void *a)
322 {
323 /* To avoid any unused-parameter or
324 unused-but-set-parameter warning. */
325 some_global = a;
326 }
327 static void *start_routine(void *a) { return a; }],
328 [pthread_t th; pthread_attr_t attr;
329 pthread_create(&th, 0, start_routine, 0);
330 pthread_join(th, 0);
331 pthread_attr_init(&attr);
332 pthread_cleanup_push(routine, 0);
333 pthread_cleanup_pop(0) /* ; */])],
334 [ax_pthread_ok=yes],
335 [])
336
337 CFLAGS="$ax_pthread_save_CFLAGS"
338 LIBS="$ax_pthread_save_LIBS"
339
340 AC_MSG_RESULT([$ax_pthread_ok])
341 AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
342
343 PTHREAD_LIBS=""
344 PTHREAD_CFLAGS=""
345 done
346 fi
347
348
349 # Clang needs special handling, because older versions handle the -pthread
350 # option in a rather... idiosyncratic way
351
352 if test "x$ax_pthread_clang" = "xyes"; then
353
354 # Clang takes -pthread; it has never supported any other flag
355
356 # (Note 1: This will need to be revisited if a system that Clang
357 # supports has POSIX threads in a separate library. This tends not
358 # to be the way of modern systems, but it's conceivable.)
359
360 # (Note 2: On some systems, notably Darwin, -pthread is not needed
361 # to get POSIX threads support; the API is always present and
362 # active. We could reasonably leave PTHREAD_CFLAGS empty. But
363 # -pthread does define _REENTRANT, and while the Darwin headers
364 # ignore this macro, third-party headers might not.)
365
366 # However, older versions of Clang make a point of warning the user
367 # that, in an invocation where only linking and no compilation is
368 # taking place, the -pthread option has no effect ("argument unused
369 # during compilation"). They expect -pthread to be passed in only
370 # when source code is being compiled.
371 #
372 # Problem is, this is at odds with the way Automake and most other
373 # C build frameworks function, which is that the same flags used in
374 # compilation (CFLAGS) are also used in linking. Many systems
375 # supported by AX_PTHREAD require exactly this for POSIX threads
376 # support, and in fact it is often not straightforward to specify a
377 # flag that is used only in the compilation phase and not in
378 # linking. Such a scenario is extremely rare in practice.
379 #
380 # Even though use of the -pthread flag in linking would only print
381 # a warning, this can be a nuisance for well-run software projects
382 # that build with -Werror. So if the active version of Clang has
383 # this misfeature, we search for an option to squash it.
384
385 AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
386 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
387 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
388 # Create an alternate version of $ac_link that compiles and
389 # links in two steps (.c -> .o, .o -> exe) instead of one
390 # (.c -> exe), because the warning occurs only in the second
391 # step
392 ax_pthread_save_ac_link="$ac_link"
393 ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
394 ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
395 ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
396 ax_pthread_save_CFLAGS="$CFLAGS"
397 for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
398 AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
399 CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
400 ac_link="$ax_pthread_save_ac_link"
401 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
402 [ac_link="$ax_pthread_2step_ac_link"
403 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
404 [break])
405 ])
406 done
407 ac_link="$ax_pthread_save_ac_link"
408 CFLAGS="$ax_pthread_save_CFLAGS"
409 AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
410 ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
411 ])
412
413 case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
414 no | unknown) ;;
415 *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
416 esac
417
418 fi # $ax_pthread_clang = yes
419
420
421
422 # Various other checks:
423 if test "x$ax_pthread_ok" = "xyes"; then
424 ax_pthread_save_CFLAGS="$CFLAGS"
425 ax_pthread_save_LIBS="$LIBS"
426 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
427 LIBS="$PTHREAD_LIBS $LIBS"
428
429 # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
430 AC_CACHE_CHECK([for joinable pthread attribute],
431 [ax_cv_PTHREAD_JOINABLE_ATTR],
432 [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
433 for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
434 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
435 [int attr = $ax_pthread_attr; return attr /* ; */])],
436 [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
437 [])
438 done
439 ])
440 AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
441 test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
442 test "x$ax_pthread_joinable_attr_defined" != "xyes"],
443 [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
444 [$ax_cv_PTHREAD_JOINABLE_ATTR],
445 [Define to necessary symbol if this constant
446 uses a non-standard name on your system.])
447 ax_pthread_joinable_attr_defined=yes
448 ])
449
450 AC_CACHE_CHECK([whether more special flags are required for pthreads],
451 [ax_cv_PTHREAD_SPECIAL_FLAGS],
452 [ax_cv_PTHREAD_SPECIAL_FLAGS=no
453 case $host_os in
454 solaris*)
455 ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
456 ;;
457 esac
458 ])
459 AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
460 test "x$ax_pthread_special_flags_added" != "xyes"],
461 [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
462 ax_pthread_special_flags_added=yes])
463
464 AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
465 [ax_cv_PTHREAD_PRIO_INHERIT],
466 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
467 [[int i = PTHREAD_PRIO_INHERIT;
468 return i;]])],
469 [ax_cv_PTHREAD_PRIO_INHERIT=yes],
470 [ax_cv_PTHREAD_PRIO_INHERIT=no])
471 ])
472 AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
473 test "x$ax_pthread_prio_inherit_defined" != "xyes"],
474 [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
475 ax_pthread_prio_inherit_defined=yes
476 ])
477
478 CFLAGS="$ax_pthread_save_CFLAGS"
479 LIBS="$ax_pthread_save_LIBS"
480
481 # More AIX lossage: compile with *_r variant
482 if test "x$GCC" != "xyes"; then
483 case $host_os in
484 aix*)
485 AS_CASE(["x/$CC"],
486 [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
487 [#handle absolute path differently from PATH based program lookup
488 AS_CASE(["x$CC"],
489 [x/*],
490 [
491 AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
492 AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
493 ],
494 [
495 AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
496 AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
497 ]
498 )
499 ])
500 ;;
501 esac
502 fi
503 fi
504
505 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
506 test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
507
508 AC_SUBST([PTHREAD_LIBS])
509 AC_SUBST([PTHREAD_CFLAGS])
510 AC_SUBST([PTHREAD_CC])
511 AC_SUBST([PTHREAD_CXX])
512
513 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
514 if test "x$ax_pthread_ok" = "xyes"; then
515 ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
516 :
517 else
518 ax_pthread_ok=no
519 $2
520 fi
521 AC_LANG_POP
522 ])dnl AX_PTHREAD