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# ===========================================================================
# http://autoconf-archive.cryp.to/ax_gxx_version.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_GXX_VERSION
#
# DESCRIPTION
#
# This macro retrieves the g++ version and returns it in the GXX_VERSION
# variable if available, an empty string otherwise.
#
# LAST MODIFICATION
#
# 2008-04-12
#
# COPYLEFT
#
# Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Macro Archive. When you make and
# distribute a modified version of the Autoconf Macro, you may extend this
# special exception to the GPL to apply to your modified version as well.
AC_DEFUN([AX_GXX_VERSION], [
GXX_VERSION=""
AX_GCC_OPTION([-dumpversion],[],[],[
ax_gcc_version_option=yes
],[
ax_gcc_version_option=no
])
AS_IF([test "x$GXX" = "xyes"],[
AS_IF([test "x$ax_gxx_version_option" != "no"],[
AC_CACHE_CHECK([gxx version],[ax_cv_gxx_version],[
ax_cv_gxx_version="`$CXX -dumpversion`"
AS_IF([test "x$ax_cv_gxx_version" = "x"],[
ax_cv_gxx_version=""
])
])
GXX_VERSION=$ax_cv_gxx_version
])
])
AC_SUBST([GXX_VERSION])
])
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