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

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

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

#

# SYNOPSIS

#

#   AX_GCC_VERSION

#

# DESCRIPTION

#

#   This macro retrieves the gcc version and returns it in the GCC_VERSION

#   variable if available, an empty string otherwise.

#

# LICENSE

#

#   Copyright (c) 2009 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 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.

#serial 7

AC_DEFUN([AX_GCC_VERSION], [

  GCC_VERSION=""

  AX_GCC_OPTION([-dumpversion],[],[],[

    ax_gcc_version_option=yes

  ],[

    ax_gcc_version_option=no

  ])

  AS_IF([test "x$GCC" = "xyes"],[

    AS_IF([test "x$ax_gcc_version_option" != "xno"],[

      AC_CACHE_CHECK([gcc version],[ax_cv_gcc_version],[

        ax_cv_gcc_version="`$CC -dumpversion`"

        AS_IF([test "x$ax_cv_gcc_version" = "x"],[

          ax_cv_gcc_version=""

        ])

      ])

      GCC_VERSION=$ax_cv_gcc_version

    ])

  ])

  AC_SUBST([GCC_VERSION])

])