1 dnl Copyright (C) 2007-2010 CEA/DEN, EDF R&D, OPEN CASCADE
3 dnl Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 dnl CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 dnl This library is free software; you can redistribute it and/or
7 dnl modify it under the terms of the GNU Lesser General Public
8 dnl License as published by the Free Software Foundation; either
9 dnl version 2.1 of the License.
11 dnl This library is distributed in the hope that it will be useful,
12 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
13 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 dnl Lesser General Public License for more details.
16 dnl You should have received a copy of the GNU Lesser General Public
17 dnl License along with this library; if not, write to the Free Software
18 dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 dnl See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 dnl Paul RASCLE: modification for Linux: -pthread required by boost...
24 dnl Available from the GNU Autoconf Macro Archive at:
26 AC_DEFUN([ACX_PTHREAD], [
27 AC_REQUIRE([AC_CANONICAL_HOST])
32 # We used to check for pthread.h first, but this fails if pthread.h
33 # requires special compiler flags (e.g. on True64 or Sequent).
34 # It gets checked for in the link test anyway.
36 # First of all, check if the user has set any of the PTHREAD_LIBS,
37 # etcetera environment variables, and if threads linking works using
39 if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
41 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
43 LIBS="$PTHREAD_LIBS $LIBS"
44 AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
45 AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
46 AC_MSG_RESULT($acx_pthread_ok)
47 if test x"$acx_pthread_ok" = xno; then
55 # We must check for the threads library under a number of different
56 # names; the ordering is very important because some systems
57 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
58 # libraries is broken (non-POSIX).
60 # Create a list of thread flags to try. Items starting with a "-" are
61 # C compiler flags, and other items are library names, except for "none"
62 # which indicates that we try without any flags at all, and "pthread-config"
63 # which is a program returning the flags for the Pth emulation library.
65 acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
67 # The ordering *is* (sometimes) important. Some notes on the
68 # individual items follow:
70 # pthreads: AIX (must check this before -lpthread)
71 # none: in case threads are in libc; should be tried before -Kthread and
72 # other compiler flags to prevent continual compiler warnings
73 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
74 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
75 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
76 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
77 # -pthreads: Solaris/gcc
78 # -mthreads: Mingw32/gcc, Lynx/gcc
79 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
80 # doesn't hurt to check since this sometimes defines pthreads too;
81 # also defines -D_REENTRANT)
82 # pthread: Linux, etcetera
83 # --thread-safe: KAI C++
84 # pthread-config: use pthread-config program (for GNU Pth library)
86 case "${host_cpu}-${host_os}" in
89 # On linux "none" works, but boost requires -pthread, so, try first "-pthread"
90 acx_pthread_flags="-pthread pthreads none -Kthread -kthread lthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
95 # On Solaris (at least, for some versions), libc contains stubbed
96 # (non-functional) versions of the pthreads routines, so link-based
97 # tests will erroneously succeed. (We need to link with -pthread or
98 # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
99 # a function called by this macro, so we could check for that, but
100 # who knows whether they'll stub that too in a future libc.) So,
101 # we'll just look for -pthreads and -lpthread first:
103 acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
107 if test x"$acx_pthread_ok" = xno; then
108 for flag in $acx_pthread_flags; do
112 AC_MSG_CHECKING([whether pthreads work without any flags])
116 AC_MSG_CHECKING([whether pthreads work with $flag])
117 PTHREAD_CFLAGS="$flag"
121 AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
122 if test x"$acx_pthread_config" = xno; then continue; fi
123 PTHREAD_CFLAGS="`pthread-config --cflags`"
124 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
128 AC_MSG_CHECKING([for the pthreads library -l$flag])
129 PTHREAD_LIBS="-l$flag"
134 save_CFLAGS="$CFLAGS"
135 LIBS="$PTHREAD_LIBS $LIBS"
136 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
138 # Check for various functions. We must include pthread.h,
139 # since some functions may be macros. (On the Sequent, we
140 # need a special flag -Kthread to make this header compile.)
141 # We check for pthread_join because it is in -lpthread on IRIX
142 # while pthread_create is in libc. We check for pthread_attr_init
143 # due to DEC craziness with -lpthreads. We check for
144 # pthread_cleanup_push because it is one of the few pthread
145 # functions on Solaris that doesn't have a non-functional libc stub.
146 # We try pthread_create on general principles.
147 AC_TRY_LINK([#include <pthread.h>],
148 [pthread_t th; pthread_join(th, 0);
149 pthread_attr_init(0); pthread_cleanup_push(0, 0);
150 pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
151 [acx_pthread_ok=yes])
154 CFLAGS="$save_CFLAGS"
156 AC_MSG_RESULT($acx_pthread_ok)
157 if test "x$acx_pthread_ok" = xyes; then
166 # Various other checks:
167 if test "x$acx_pthread_ok" = xyes; then
169 LIBS="$PTHREAD_LIBS $LIBS"
170 save_CFLAGS="$CFLAGS"
171 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
173 # Detect AIX lossage: threads are created detached by default
174 # and the JOINABLE attribute has a nonstandard name (UNDETACHED).
175 AC_MSG_CHECKING([for joinable pthread attribute])
176 AC_TRY_LINK([#include <pthread.h>],
177 [int attr=PTHREAD_CREATE_JOINABLE;],
178 ok=PTHREAD_CREATE_JOINABLE, ok=unknown)
179 if test x"$ok" = xunknown; then
180 AC_TRY_LINK([#include <pthread.h>],
181 [int attr=PTHREAD_CREATE_UNDETACHED;],
182 ok=PTHREAD_CREATE_UNDETACHED, ok=unknown)
184 if test x"$ok" != xPTHREAD_CREATE_JOINABLE; then
185 AC_DEFINE(PTHREAD_CREATE_JOINABLE, $ok,
186 [Define to the necessary symbol if this constant
187 uses a non-standard name on your system.])
190 if test x"$ok" = xunknown; then
191 AC_MSG_WARN([we do not know how to create joinable pthreads])
194 AC_MSG_CHECKING([if more special flags are required for pthreads])
196 case "${host_cpu}-${host_os}" in
197 *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
198 *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
200 AC_MSG_RESULT(${flag})
201 if test "x$flag" != xno; then
202 PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
206 CFLAGS="$save_CFLAGS"
208 # More AIX lossage: must compile with cc_r
209 AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
214 AC_SUBST(PTHREAD_LIBS)
215 AC_SUBST(PTHREAD_CFLAGS)
218 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
219 if test x"$acx_pthread_ok" = xyes; then
220 ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])