dnl  Copyright (C) 2007-2008  CEA/DEN, EDF R&D, OPEN CASCADE
dnl
dnl  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
dnl  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
dnl
dnl  This library is free software; you can redistribute it and/or
dnl  modify it under the terms of the GNU Lesser General Public
dnl  License as published by the Free Software Foundation; either
dnl  version 2.1 of the License.
dnl
dnl  This library is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl  Lesser General Public License for more details.
dnl
dnl  You should have received a copy of the GNU Lesser General Public
dnl  License along with this library; if not, write to the Free Software
dnl  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
dnl
dnl  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
dnl
#@synonpsis CHECK_PTHREADS
dnl  check for pthreads system interfaces.
dnl  set CFLAGS_PTHREADS,  CXXFLAGS_PTHREADS and LIBS_PTHREADS to
dnl  flags to compiler flags for multithread program compilation (if exists),
dnl  and library, if one required.
dnl
dnl@author   (C) Ruslan Shevchenko <Ruslan@Shevchenko.Kiev.UA>, 1998
dnl@id $Id$
dnl ----------------------------------------------------------------
dnl CHECK_PTHREADS
AC_DEFUN([CHECK_PTHREADS],[
AC_CXX_OPTION(-pthread,CPPFLAGS,flag=yes,flag=no)

if test $flag = no; then
  AC_REQUIRE([AC_CANONICAL_SYSTEM])dnl
  AC_CHECK_HEADER(pthread.h,AC_DEFINE(HAVE_PTHREAD_H))
  AC_CHECK_LIB(posix4,nanosleep, LIBS_PTHREADS="-lposix4",LIBS_PTHREADS="")
  AC_CHECK_LIB(pthread,pthread_mutex_lock, 
               LIBS_PTHREADS="-lpthread $LIBS_PTHREADS",LIBS_PTHREADS="")
else
    case $host_os in
      osf*)
        LIBS_PTHREADS="-lpthread $LIBS_PTHREADS"
        ;;
    esac
fi

if test $flag = no && test x$LIBS_PTHREADS = x; then
  threads_ok=no
else
  threads_ok=yes
fi
])dnl
dnl
dnl