# ===========================================================================

#      http://www.gnu.org/software/autoconf-archive/ax_boost_system.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_BOOST_SYSTEM

#

# DESCRIPTION

#

#   Test for System library from the Boost C++ libraries. The macro requires

#   a preceding call to AX_BOOST_BASE. Further documentation is available at

#   <http: boost="" index.html="" randspringer.de="">.</http:>

#

#   This macro calls:

#

#     AC_SUBST(BOOST_SYSTEM_LIB)

#

#   And sets:

#

#     HAVE_BOOST_SYSTEM

#

# LICENSE

#

#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de></thomas@randspringer.de>

#   Copyright (c) 2008 Michael Tindal

#   Copyright (c) 2008 Daniel Casimiro <dan.casimiro@gmail.com></dan.casimiro@gmail.com>

#

#   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. This file is offered as-is, without any

#   warranty.

#serial 17

AC_DEFUN([AX_BOOST_SYSTEM],

[

	AC_ARG_WITH([boost-system],

	AS_HELP_STRING([--with-boost-system@<:@=special-lib@:>@],

                   [use the System library from boost - it is possible to specify a certain library for the linker

                        e.g. --with-boost-system=boost_system-gcc-mt ]),

        [

        if test "$withval" = "no"; then

			want_boost="no"

        elif test "$withval" = "yes"; then

            want_boost="yes"

            ax_boost_user_system_lib=""

        else

		    want_boost="yes"

		ax_boost_user_system_lib="$withval"

		fi

        ],

        [want_boost="yes"]

	)

	if test "x$want_boost" = "xyes"; then

        AC_REQUIRE([AC_PROG_CC])

        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::System library is available,

					   ax_cv_boost_system,

        [AC_LANG_PUSH([C++])

			 CXXFLAGS_SAVE=$CXXFLAGS

			 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost error_code.hpp="" system="">]],</boost>

                                   [[boost::system::system_category]])],

                   ax_cv_boost_system=yes, ax_cv_boost_system=no)

			 CXXFLAGS=$CXXFLAGS_SAVE

             AC_LANG_POP([C++])

		])

		if test "x$ax_cv_boost_system" = "xyes"; then

			AC_SUBST(BOOST_CPPFLAGS)

			AC_DEFINE(HAVE_BOOST_SYSTEM,,[define if the Boost::System library is available])

            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`

			LDFLAGS_SAVE=$LDFLAGS

            if test "x$ax_boost_user_system_lib" = "x"; then

                for libextension in `ls -r $BOOSTLIBDIR/libboost_system* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do

                     ax_lib=${libextension}

				    AC_CHECK_LIB($ax_lib, exit,

                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],

                                 [link_system="no"])

				done

                if test "x$link_system" != "xyes"; then

                for libextension in `ls -r $BOOSTLIBDIR/boost_system* 2>/dev/null | sed 's,.*/,,' | sed -e 's,\..*,,'` ; do

                     ax_lib=${libextension}

				    AC_CHECK_LIB($ax_lib, exit,

                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],

                                 [link_system="no"])

				done

                fi

            else

               for ax_lib in $ax_boost_user_system_lib boost_system-$ax_boost_user_system_lib; do

				      AC_CHECK_LIB($ax_lib, exit,

                                   [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],

                                   [link_system="no"])

                  done

            fi

            if test "x$ax_lib" = "x"; then

                AC_MSG_ERROR(Could not find a version of the library!)

            fi

			if test "x$link_system" = "xno"; then

				AC_MSG_ERROR(Could not link against $ax_lib !)

			fi

		fi

		CPPFLAGS="$CPPFLAGS_SAVED"

	LDFLAGS="$LDFLAGS_SAVED"

	fi

])