m4: update ax_c_check_flag.m4

git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@978 211d60ee-9f03-0410-a15a-8952a2c7a4e4

1 files changed, 34 insertions, 40 deletions

diff --git a/m4/ax_c_check_flag.m4 b/m4/ax_c_check_flag.m4
index 68daeb3..d96df54 100644
--- a/m4/ax_c_check_flag.m4
+++ b/m4/ax_c_check_flag.m4
@@ -1,57 +1,52 @@
-##### http://autoconf-archive.cryp.to/ax_c_check_flag.html
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_c_check_flag.html
+# ===========================================================================
 #
 # SYNOPSIS
 #
-#
-AX_C_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
+#   AX_C_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
 #
 # DESCRIPTION
 #
-#   This macro tests if the C compiler supports the flag FLAG-TO-CHECK.
-#   If successfull execute ACTION-IF-SUCCESS otherwise
-#   ACTION-IF-FAILURE. PROLOGUE and BODY are optional and should be
-#   used as in AC_LANG_PROGRAM macro.
+#   This macro tests if the C compiler supports the flag FLAG-TO-CHECK. If
+#   successfull execute ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE.
+#   PROLOGUE and BODY are optional and should be used as in AC_LANG_PROGRAM
+#   macro.
 #
 #   This code is inspired from KDE_CHECK_COMPILER_FLAG macro. Thanks to
 #   Bogdan Drozdowski <bogdandr@op.pl> for testing and bug fixes.
 #
-# LAST MODIFICATION
-#
-#   2007-11-26
-#
-# COPYLEFT
+# LICENSE
 #
-#   Copyright (c) 2007 Francesco Salvestrini <salvestrini@users.sourceforge.net>
+#   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 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.
+#   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, write to the Free Software
-#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-#   02111-1307, USA.
+#   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.
+#   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.
+#   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 6
 
 AC_DEFUN([AX_C_CHECK_FLAG],[
   AC_PREREQ([2.61])
@@ -67,8 +62,7 @@ AC_DEFUN([AX_C_CHECK_FLAG],[
 
     save_CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS $1"
-
-    AC_LINK_IFELSE([
+    AC_COMPILE_IFELSE([
       AC_LANG_PROGRAM([$2],[$3])
     ],[
       eval "ax_cv_c_check_flag_$flag=yes"
@@ -83,10 +77,10 @@ AC_DEFUN([AX_C_CHECK_FLAG],[
   ])
 
   AS_IF([eval "test \"`echo '$ax_cv_c_check_flag_'$flag`\" = yes"],[
-   :
+    :
     $4
   ],[
-   :
+    :
     $5
   ])
 ])