1 dnl Copyright (C) 2007-2008 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
22 dnl Paul RASCLE: modification for Linux: -pthread required by boost...
23 dnl Available from the GNU Autoconf Macro Archive at:
25 AC_DEFUN([ACX_PTHREAD], [
26 AC_REQUIRE([AC_CANONICAL_HOST])
31 # We used to check for pthread.h first, but this fails if pthread.h
32 # requires special compiler flags (e.g. on True64 or Sequent).
33 # It gets checked for in the link test anyway.
35 # First of all, check if the user has set any of the PTHREAD_LIBS,
36 # etcetera environment variables, and if threads linking works using
38 if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
40 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
42 LIBS="$PTHREAD_LIBS $LIBS"
43 AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
44 AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
45 AC_MSG_RESULT($acx_pthread_ok)
46 if test x"$acx_pthread_ok" = xno; then
54 # We must check for the threads library under a number of different
55 # names; the ordering is very important because some systems
56 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
57 # libraries is broken (non-POSIX).
59 # Create a list of thread flags to try. Items starting with a "-" are
60 # C compiler flags, and other items are library names, except for "none"
61 # which indicates that we try without any flags at all, and "pthread-config"
62 # which is a program returning the flags for the Pth emulation library.
64 acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
66 # The ordering *is* (sometimes) important. Some notes on the
67 # individual items follow:
69 # pthreads: AIX (must check this before -lpthread)
70 # none: in case threads are in libc; should be tried before -Kthread and
71 # other compiler flags to prevent continual compiler warnings
72 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
73 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
74 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
75 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
76 # -pthreads: Solaris/gcc
77 # -mthreads: Mingw32/gcc, Lynx/gcc
78 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
79 # doesn't hurt to check since this sometimes defines pthreads too;
80 # also defines -D_REENTRANT)
81 # pthread: Linux, etcetera
82 # --thread-safe: KAI C++
83 # pthread-config: use pthread-config program (for GNU Pth library)
85 case "${host_cpu}-${host_os}" in
88 # On linux "none" works, but boost requires -pthread, so, try first "-pthread"
89 acx_pthread_flags="-pthread pthreads none -Kthread -kthread lthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
94 # On Solaris (at least, for some versions), libc contains stubbed
95 # (non-functional) versions of the pthreads routines, so link-based
96 # tests will erroneously succeed. (We need to link with -pthread or
97 # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
98 # a function called by this macro, so we could check for that, but
99 # who knows whether they'll stub that too in a future libc.) So,
100 # we'll just look for -pthreads and -lpthread first:
102 acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
106 if test x"$acx_pthread_ok" = xno; then
107 for flag in $acx_pthread_flags; do
111 AC_MSG_CHECKING([whether pthreads work without any flags])
115 AC_MSG_CHECKING([whether pthreads work with $flag])
116 PTHREAD_CFLAGS="$flag"
120 AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
121 if test x"$acx_pthread_config" = xno; then continue; fi
122 PTHREAD_CFLAGS="`pthread-config --cflags`"
123 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
127 AC_MSG_CHECKING([for the pthreads library -l$flag])
128 PTHREAD_LIBS="-l$flag"
133 save_CFLAGS="$CFLAGS"
134 LIBS="$PTHREAD_LIBS $LIBS"
135 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
137 # Check for various functions. We must include pthread.h,
138 # since some functions may be macros. (On the Sequent, we
139 # need a special flag -Kthread to make this header compile.)
140 # We check for pthread_join because it is in -lpthread on IRIX
141 # while pthread_create is in libc. We check for pthread_attr_init
142 # due to DEC craziness with -lpthreads. We check for
143 # pthread_cleanup_push because it is one of the few pthread
144 # functions on Solaris that doesn't have a non-functional libc stub.
145 # We try pthread_create on general principles.
146 AC_TRY_LINK([#include <pthread.h>],
147 [pthread_t th; pthread_join(th, 0);
148 pthread_attr_init(0); pthread_cleanup_push(0, 0);
149 pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
150 [acx_pthread_ok=yes])
153 CFLAGS="$save_CFLAGS"
155 AC_MSG_RESULT($acx_pthread_ok)
156 if test "x$acx_pthread_ok" = xyes; then
165 # Various other checks:
166 if test "x$acx_pthread_ok" = xyes; then
168 LIBS="$PTHREAD_LIBS $LIBS"
169 save_CFLAGS="$CFLAGS"
170 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
172 # Detect AIX lossage: threads are created detached by default
173 # and the JOINABLE attribute has a nonstandard name (UNDETACHED).
174 AC_MSG_CHECKING([for joinable pthread attribute])
175 AC_TRY_LINK([#include <pthread.h>],
176 [int attr=PTHREAD_CREATE_JOINABLE;],
177 ok=PTHREAD_CREATE_JOINABLE, ok=unknown)
178 if test x"$ok" = xunknown; then
179 AC_TRY_LINK([#include <pthread.h>],
180 [int attr=PTHREAD_CREATE_UNDETACHED;],
181 ok=PTHREAD_CREATE_UNDETACHED, ok=unknown)
183 if test x"$ok" != xPTHREAD_CREATE_JOINABLE; then
184 AC_DEFINE(PTHREAD_CREATE_JOINABLE, $ok,
185 [Define to the necessary symbol if this constant
186 uses a non-standard name on your system.])
189 if test x"$ok" = xunknown; then
190 AC_MSG_WARN([we do not know how to create joinable pthreads])
193 AC_MSG_CHECKING([if more special flags are required for pthreads])
195 case "${host_cpu}-${host_os}" in
196 *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
197 *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
199 AC_MSG_RESULT(${flag})
200 if test "x$flag" != xno; then
201 PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
205 CFLAGS="$save_CFLAGS"
207 # More AIX lossage: must compile with cc_r
208 AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
213 AC_SUBST(PTHREAD_LIBS)
214 AC_SUBST(PTHREAD_CFLAGS)
217 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
218 if test x"$acx_pthread_ok" = xyes; then
219 ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])