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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_boost_filesystem.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_BOOST_FILESYSTEM
#
# DESCRIPTION
#
# Test for Filesystem 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_FILESYSTEM_LIB)
#
# And sets:
#
# HAVE_BOOST_FILESYSTEM
#
# LICENSE
#
# Copyright (c) 2009 Thomas Porschberg <thomas@randspringer.de>
# Copyright (c) 2009 Michael Tindal
# Copyright (c) 2009 Roman Rybalko <libtorrent@romanr.info>
#
# 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 24

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

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

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

LIBS_SAVED=$LIBS
LIBS="$LIBS $BOOST_SYSTEM_LIB"
export LIBS

        AC_CACHE_CHECK(whether the Boost::Filesystem library is available,
ax_cv_boost_filesystem,
        [AC_LANG_PUSH([C++])
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/filesystem/path.hpp>]],
                                   [[using namespace boost::filesystem;
                                   path my_path( "foo/bar/data.txt" );
                                   return 0;]])],
ax_cv_boost_filesystem=yes, ax_cv_boost_filesystem=no)
         AC_LANG_POP([C++])
])
if test "x$ax_cv_boost_filesystem" = "xyes"; then
AC_DEFINE(HAVE_BOOST_FILESYSTEM,,[define if the Boost::Filesystem library is available])
            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
            if test "x$ax_boost_user_filesystem_lib" = "x"; then
                for libextension in `ls $BOOSTLIBDIR/libboost_filesystem*.so* $BOOSTLIBDIR/libboost_filesystem*.dylib* $BOOSTLIBDIR/libboost_filesystem*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_filesystem.*\)\.\(dylib\|a\|so\).*$;\1;' | tac` ; do
                     ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
                                 [BOOST_FILESYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_FILESYSTEM_LIB) link_filesystem="yes"; break],
                                 [link_filesystem="no"])
done
                if test "x$link_filesystem" != "xyes"; then
                for libextension in `ls $BOOSTLIBDIR/boost_filesystem*.dll* $BOOSTLIBDIR/boost_filesystem*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_filesystem.*\)\.\(dll\|a\).*$;\1;' | tac` ; do
                     ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
                                 [BOOST_FILESYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_FILESYSTEM_LIB) link_filesystem="yes"; break],
                                 [link_filesystem="no"])
done
fi
            else
               for ax_lib in $ax_boost_user_filesystem_lib boost_filesystem-$ax_boost_user_filesystem_lib; do
AC_CHECK_LIB($ax_lib, exit,
                                   [BOOST_FILESYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_FILESYSTEM_LIB) link_filesystem="yes"; break],
                                   [link_filesystem="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_filesystem" != "xyes"; then
AC_MSG_ERROR(Could not link against $ax_lib !)
fi
fi

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