update ax_*.m4 files from upstream

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

4 files changed, 157 insertions, 172 deletions

diff --git a/m4/ax_append_flag.m4 b/m4/ax_append_flag.m4
new file mode 100644
index 0000000..1d38b76
--- /dev/null
+++ b/m4/ax_append_flag.m4
@@ -0,0 +1,69 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE])
+#
+# DESCRIPTION
+#
+#   FLAG is appended to the FLAGS-VARIABLE shell variable, with a space
+#   added in between.
+#
+#   If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
+#   CFLAGS) is used.  FLAGS-VARIABLE is not changed if it already contains
+#   FLAG.  If FLAGS-VARIABLE is unset in the shell, it is set to exactly
+#   FLAG.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@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 3 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 2
+
+AC_DEFUN([AX_APPEND_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])dnl
+AS_VAR_SET_IF(FLAGS,
+  [case " AS_VAR_GET(FLAGS) " in
+    *" $1 "*)
+      AC_RUN_LOG([: FLAGS already contains $1])
+      ;;
+    *)
+      AC_RUN_LOG([: FLAGS="$FLAGS $1"])
+      AS_VAR_SET(FLAGS, ["AS_VAR_GET(FLAGS) $1"])
+      ;;
+   esac],
+  [AS_VAR_SET(FLAGS,["$1"])])
+AS_VAR_POPDEF([FLAGS])dnl
+])dnl AX_APPEND_FLAG
diff --git a/m4/ax_cflags_warn_all.m4 b/m4/ax_cflags_warn_all.m4
index 7625580..c22e37f 100644
--- a/m4/ax_cflags_warn_all.m4
+++ b/m4/ax_cflags_warn_all.m4
@@ -25,6 +25,8 @@
 #    - $3 action-if-found : add value to shellvariable
 #    - $4 action-if-not-found : nothing
 #
+#   NOTE: These macros depend on AX_APPEND_FLAG.
+#
 # LICENSE
 #
 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
@@ -56,99 +58,14 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 10
+#serial 13
 
-AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
-AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
-AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all])dnl
+AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl
+AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl
 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
 VAR,[VAR="no, unknown"
- AC_LANG_PUSH([C])
- ac_save_[]FLAGS="$[]FLAGS"
-for ac_arg dnl
-in "-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([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_CXXFLAGS_WARN_ALL],[dnl
-AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
-AS_VAR_PUSHDEF([VAR],[ax_cv_cxxflags_warn_all])dnl
-AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
-VAR,[VAR="no, unknown"
- AC_LANG_PUSH([C++])
- ac_save_[]FLAGS="$[]FLAGS"
-for ac_arg dnl
-in "-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([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"
+ac_save_[]FLAGS="$[]FLAGS"
 for ac_arg dnl
 in "-warn all  % -warn all"   dnl Intel
    "-pedantic  % -Wall"       dnl GCC
@@ -164,25 +81,16 @@ do FLAGS="$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])
+FLAGS="$ac_save_[]FLAGS"
 ])
+AS_VAR_POPDEF([FLAGS])dnl
 case ".$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 ]) ;;
+   .|.no|.no,*) m4_default($4,[m4_ifval($2,[AX_APPEND_FLAG([$2], [$1])])]) ;;
+   *) m4_default($3,[AX_APPEND_FLAG([$VAR], [$1])]) ;;
 esac
 AS_VAR_POPDEF([VAR])dnl
-AS_VAR_POPDEF([FLAGS])dnl
-])
-
+])dnl AX_FLAGS_WARN_ALL
 dnl  implementation tactics:
 dnl   the for-argument contains a list of options. The first part of
 dnl   these does only exist to detect the compiler - usually it is
@@ -193,3 +101,21 @@ 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   delimiter. A non-option comment can be given after "%%" marks
 dnl   which will be shown but not added to the respective C/CXXFLAGS.
+
+AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
+AC_LANG_PUSH([C])
+AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+AC_LANG_POP([C])
+])
+
+AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl
+AC_LANG_PUSH([C++])
+AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+AC_LANG_POP([C++])
+])
+
+AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl
+AC_LANG_PUSH([Fortran])
+AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+AC_LANG_POP([Fortran])
+])
diff --git a/m4/ax_check_compiler_flags.m4 b/m4/ax_check_compile_flag.m4
index 35bfd2a..c3a8d69 100644
--- a/m4/ax_check_compiler_flags.m4
+++ b/m4/ax_check_compile_flag.m4
@@ -1,24 +1,31 @@
 # ===========================================================================
-#  http://www.gnu.org/software/autoconf-archive/ax_check_compiler_flags.html
+#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
-#   AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE])
+#   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
 #
 # DESCRIPTION
 #
-#   Check whether the given compiler FLAGS work with the current language's
-#   compiler, or whether they give an error. (Warnings, however, are
-#   ignored.)
+#   Check whether the given FLAG works with the current language's compiler
+#   or gives an error.  (Warnings, however, are ignored)
 #
 #   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
 #   success/failure.
 #
+#   If EXTRA-FLAGS is defined, it is added to the current language's default
+#   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
+#   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
+#   force the compiler to issue an error when a bad flag is given.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
 # LICENSE
 #
-#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2009 Matteo Frigo
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@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
@@ -46,31 +53,20 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 9
+#serial 2
 
-AC_DEFUN([AX_CHECK_COMPILER_FLAGS],
-[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
-AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1])
-dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
-AS_LITERAL_IF([$1],
-  [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]), [
-      ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
-      _AC_LANG_PREFIX[]FLAGS="$1"
-      AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
-        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes,
-        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no)
-      _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])],
-  [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
-   _AC_LANG_PREFIX[]FLAGS="$1"
-   AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
-     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes,
-     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no)
-   _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])
-eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])
-AC_MSG_RESULT($ax_check_compiler_flags)
-if test "x$ax_check_compiler_flags" = xyes; then
-	m4_default([$2], :)
-else
-	m4_default([$3], :)
-fi
-])dnl AX_CHECK_COMPILER_FLAGS
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+  ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+  _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS
diff --git a/m4/ax_check_linker_flags.m4 b/m4/ax_check_link_flag.m4
index 894713c..e2d0d36 100644
--- a/m4/ax_check_linker_flags.m4
+++ b/m4/ax_check_link_flag.m4
@@ -1,26 +1,31 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_linker_flags.html
+#    http://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
-#   AX_CHECK_LINKER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE])
+#   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
 #
 # DESCRIPTION
 #
-#   Check whether the given linker FLAGS work with the current language's
-#   linker, or whether they give an error.
+#   Check whether the given FLAG works with the linker or gives an error.
+#   (Warnings, however, are ignored)
 #
 #   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
 #   success/failure.
 #
-#   NOTE: Based on AX_CHECK_COMPILER_FLAGS.
+#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
+#   when the check is done.  The check is thus made with the flags: "LDFLAGS
+#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
+#   issue an error when a bad flag is given.
+#
+#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+#   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
 #
 # LICENSE
 #
-#   Copyright (c) 2009 Mike Frysinger <vapier@gentoo.org>
-#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2009 Matteo Frigo
+#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@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
@@ -48,30 +53,19 @@
 #   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
+#serial 2
 
-AC_DEFUN([AX_CHECK_LINKER_FLAGS],
-[AC_MSG_CHECKING([whether the linker accepts $1])
-dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
-AS_LITERAL_IF([$1],
-  [AC_CACHE_VAL(AS_TR_SH(ax_cv_linker_flags_[$1]), [
-      ax_save_FLAGS=$LDFLAGS
-      LDFLAGS="$1"
-      AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-        AS_TR_SH(ax_cv_linker_flags_[$1])=yes,
-        AS_TR_SH(ax_cv_linker_flags_[$1])=no)
-      LDFLAGS=$ax_save_FLAGS])],
-  [ax_save_FLAGS=$LDFLAGS
-   LDFLAGS="$1"
-   AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-     eval AS_TR_SH(ax_cv_linker_flags_[$1])=yes,
-     eval AS_TR_SH(ax_cv_linker_flags_[$1])=no)
-   LDFLAGS=$ax_save_FLAGS])
-eval ax_check_linker_flags=$AS_TR_SH(ax_cv_linker_flags_[$1])
-AC_MSG_RESULT($ax_check_linker_flags)
-if test "x$ax_check_linker_flags" = xyes; then
-	m4_default([$2], :)
-else
-	m4_default([$3], :)
-fi
-])dnl AX_CHECK_LINKER_FLAGS
+AC_DEFUN([AX_CHECK_LINK_FLAG],
+[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
+AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
+  ax_check_save_flags=$LDFLAGS
+  LDFLAGS="$LDFLAGS $4 $1"
+  AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+    [AS_VAR_SET(CACHEVAR,[yes])],
+    [AS_VAR_SET(CACHEVAR,[no])])
+  LDFLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+  [m4_default([$2], :)],
+  [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_LINK_FLAGS