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# ===========================================================================
# http://autoconf-archive.cryp.to/ax_boost_thread.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_BOOST_THREAD
#
# DESCRIPTION
#
# Test for Thread library from the Boost C++ libraries. The macro requires
# a preceding call to AX_BOOST_BASE. Further documentation is available at
# <http://randspringer.de/boost/index.html>.
#
# This macro calls:
#
# AC_SUBST(BOOST_THREAD_LIB)
#
# And sets:
#
# HAVE_BOOST_THREAD
#
# LAST MODIFICATION
#
# 2008-04-12
#
# COPYLEFT
#
# Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
# Copyright (c) 2008 Michael Tindal
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved.

AC_DEFUN([AX_BOOST_THREAD],
[
AC_ARG_WITH([boost-thread],
AS_HELP_STRING([--with-boost-thread@<:@=special-lib@:>@],
                   [use the Thread library from boost - it is possible to specify a certain library for the linker
                        e.g. --with-boost-thread=boost_thread-gcc-mt ]),
        [
        if test "$withval" = "no"; then
want_boost="no"
        elif test "$withval" = "yes"; then
            want_boost="yes"
            ax_boost_user_thread_lib=""
        else
want_boost="yes"
         ax_boost_user_thread_lib="$withval"
fi
        ],
        [want_boost="yes"]
)

if test "x$want_boost" = "xyes"; then
        AC_REQUIRE([AC_PROG_CXX])
        AC_REQUIRE([AC_CANONICAL_BUILD])
CPPFLAGS_SAVED="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
export CPPFLAGS

LDFLAGS_SAVED="$LDFLAGS"
LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
export LDFLAGS

        AC_CACHE_CHECK(whether the Boost::Thread library is available,
ax_cv_boost_thread,
        [AC_LANG_PUSH([C++])
CXXFLAGS_SAVE=$CXXFLAGS

if test "x$build_os" = "xsolaris" ; then
   CXXFLAGS="-pthreads $CXXFLAGS"
elif test "x$build_os" = "xming32" ; then
CXXFLAGS="-mthreads $CXXFLAGS"
else
CXXFLAGS="-pthread $CXXFLAGS"
fi
AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[@%:@include <boost/thread/thread.hpp>]],
                                   [[boost::thread_group thrds;
                                   return 0;]]),
                   ax_cv_boost_thread=yes, ax_cv_boost_thread=no)
CXXFLAGS=$CXXFLAGS_SAVE
             AC_LANG_POP([C++])
])
if test "x$ax_cv_boost_thread" = "xyes"; then
           if test "x$build_os" = "xsolaris" ; then
BOOST_CPPFLAGS="-pthreads $BOOST_CPPFLAGS"
elif test "x$build_os" = "xming32" ; then
BOOST_CPPFLAGS="-mthreads $BOOST_CPPFLAGS"
else
BOOST_CPPFLAGS="-pthread $BOOST_CPPFLAGS"
fi

AC_SUBST(BOOST_CPPFLAGS)

AC_DEFINE(HAVE_BOOST_THREAD,,[define if the Boost::Thread library is available])
            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`

LDFLAGS_SAVE=$LDFLAGS
                        case "x$build_os" in
                          *bsd* )
                               LDFLAGS="-pthread $LDFLAGS"
                          break;
                          ;;
                        esac
            if test "x$ax_boost_user_thread_lib" = "x"; then
                for libextension in `ls $BOOSTLIBDIR/libboost_thread*.{so,a}* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_thread.*\)\.so.*$;\1;' -e 's;^lib\(boost_thread.*\)\.a*$;\1;'` ; do
                     ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
                                 [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
                                 [link_thread="no"])
   done
                if test "x$link_thread" != "xyes"; then
                for libextension in `ls $BOOSTLIBDIR/boost_thread*.{dll,a}* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_thread.*\)\.dll.*$;\1;' -e 's;^\(boost_thread.*\)\.a*$;\1;'` ; do
                     ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
                                 [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
                                 [link_thread="no"])
   done
                fi

            else
               for ax_lib in $ax_boost_user_thread_lib boost_thread-$ax_boost_user_thread_lib; do
AC_CHECK_LIB($ax_lib, exit,
                                   [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
                                   [link_thread="no"])
                  done

            fi
if test "x$link_thread" = "xno"; then
AC_MSG_ERROR(Could not link against $ax_lib !)
                        else
                           case "x$build_os" in
                              *bsd* )
BOOST_LDFLAGS="-pthread $BOOST_LDFLAGS"
                              break;
                              ;;
                           esac

fi
fi

CPPFLAGS="$CPPFLAGS_SAVED"
     LDFLAGS="$LDFLAGS_SAVED"
fi
])
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