Index: m4/ax_cflags_warn_all.m4
===================================================================
--- m4/ax_cflags_warn_all.m4	(revision 807385298d5e0a6a503e30ddb46f8b3a5a9b1534)
+++ m4/ax_cflags_warn_all.m4	(revision 378ede7fe64a6d7900e76c997f9ba925c91639fc)
@@ -1,25 +1,25 @@
 # ===========================================================================
-#           http://autoconf-archive.cryp.to/ax_cflags_warn_all.html
+#    http://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
-#   AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])]
+#   AX_CFLAGS_WARN_ALL   [(shellvar [,default, [A/NA]])]
+#   AX_CXXFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])]
+#   AX_FCFLAGS_WARN_ALL  [(shellvar [,default, [A/NA]])]
 #
 # DESCRIPTION
 #
 #   Try to find a compiler option that enables most reasonable warnings.
-#   This macro is directly derived from VL_PROG_CC_WARNINGS which is split
-#   up into two AX_CFLAGS_WARN_ALL and AX_CFLAGS_WARN_ALL_ANSI
 #
-#   For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The
-#   result is added to the shellvar being CFLAGS by default.
+#   For the GNU compiler it will be -Wall (and -ansi -pedantic) The result
+#   is added to the shellvar being CFLAGS, CXXFLAGS, or FCFLAGS by default.
 #
-#   Currently this macro knows about GCC, Solaris C compiler, Digital Unix C
-#   compiler, C for AIX Compiler, HP-UX C compiler, IRIX C compiler, NEC
-#   SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos 10.0.0.8) C
-#   compiler.
+#   Currently this macro knows about the GCC, Solaris, Digital Unix, AIX,
+#   HP-UX, IRIX, NEC SX-5 (Super-UX 10), Cray J90 (Unicos 10.0.0.8), and
+#   Intel compilers.  For a given compiler, the Fortran flags are much more
+#   experimental than their C equivalents.
 #
-#    - $1 shell-variable-to-add-to : CFLAGS
+#    - $1 shell-variable-to-add-to : CFLAGS, CXXFLAGS, or FCFLAGS
 #    - $2 add-value-if-not-found : nothing
 #    - $3 action-if-found : add value to shellvariable
@@ -29,8 +29,9 @@
 #
 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2010 Rhys Ulerich <rhys.ulerich@gmail.com>
 #
 #   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
+#   Free Software Foundation; either version 3 of the License, or (at your
 #   option) any later version.
 #
@@ -56,4 +57,6 @@
 #   exception to the GPL to apply to your modified version as well.
 
+#serial 10
+
 AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
 AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
@@ -61,6 +64,5 @@
 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
 VAR,[VAR="no, unknown"
- AC_LANG_SAVE
- AC_LANG_C
+ AC_LANG_PUSH([C])
  ac_save_[]FLAGS="$[]FLAGS"
 for ac_arg dnl
@@ -75,9 +77,9 @@
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
-   AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
+                     [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
- AC_LANG_RESTORE
+ AC_LANG_POP([C])
 ])
 case ".$VAR" in
@@ -101,9 +103,8 @@
 AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl
 AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
-AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all])dnl
+AS_VAR_PUSHDEF([VAR],[ax_cv_cxxflags_warn_all])dnl
 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
 VAR,[VAR="no, unknown"
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
+ AC_LANG_PUSH([C++])
  ac_save_[]FLAGS="$[]FLAGS"
 for ac_arg dnl
@@ -118,9 +119,52 @@
    #
 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
-   AC_TRY_COMPILE([],[return 0;],
-   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+   AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
+                     [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
 done
  FLAGS="$ac_save_[]FLAGS"
- AC_LANG_RESTORE
+ AC_LANG_POP([C++])
+])
+case ".$VAR" in
+     .ok|.ok,*) m4_ifvaln($3,$3) ;;
+   .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
+        AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
+   *) m4_ifvaln($3,$3,[
+   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
+   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
+   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
+                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
+   fi ]) ;;
+esac
+AS_VAR_POPDEF([VAR])dnl
+AS_VAR_POPDEF([FLAGS])dnl
+])
+
+dnl the only difference - the LANG selection... and the default FLAGS
+
+AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl
+AS_VAR_PUSHDEF([FLAGS],[FCFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ax_cv_fcflags_warn_all])dnl
+AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
+VAR,[VAR="no, unknown"
+ AC_LANG_PUSH([Fortran])
+ ac_save_[]FLAGS="$[]FLAGS"
+for ac_arg dnl
+in "-warn all  % -warn all"   dnl Intel
+   "-pedantic  % -Wall"       dnl GCC
+   "-xstrconst % -v"          dnl Solaris C
+   "-std1      % -verbose -w0 -warnprotos" dnl Digital Unix
+   "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
+   "-ansi -ansiE % -fullwarn" dnl IRIX
+   "+ESlit     % +w1"         dnl HP-UX C
+   "-Xc        % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
+   "-h conform % -h msglevel 2" dnl Cray C (Unicos)
+   #
+do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
+   AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
+                     [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
+done
+ FLAGS="$ac_save_[]FLAGS"
+ AC_LANG_POP([Fortran])
 ])
 case ".$VAR" in
@@ -148,4 +192,4 @@
 dnl   like -Woption or -Xoption as they think of it is a pass-through
 dnl   to later compile stages or something. The "%" is used as a
-dnl   delimimiter. A non-option comment can be given after "%%" marks
+dnl   delimiter. A non-option comment can be given after "%%" marks
 dnl   which will be shown but not added to the respective C/CXXFLAGS.
