/usr/share/aclocal/ax_gxx_version.m4 is in autoconf-archive 20110917-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | # ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_gxx_version.html
# ===========================================================================
#
# OBSOLETE MACRO
#
# This macro is non-functional, because it depends on the obsolete macro
# AX_GCC_OPTION, which has been removed from the archive.
#
# 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.
#
# LICENSE
#
# 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 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_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])
])
|