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   Autoconf Macro: ax_cflags_warn_all_ansi
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  <h1>
   ax_cflags_warn_all_ansi
  </h1>
  <h2>
   Synopsis
  </h2>
  <p class="indent" style="white-space:nowrap;">
   <code>AX_CFLAGS_WARN_ALL_ANSI [(shellvar [,default, [A/NA]])]</code>
  </p>
  <h2>
   Description
  </h2>
  <div class="indent">
   <p>
    Try to find a compiler option that enables most reasonable warnings. This
    macro is directly derived from <a href=
    "vl_prog_cc_warnings.html">VL_PROG_CC_WARNINGS</a> which is split up into
    two <a href="ax_cflags_warn_all.html">AX_CFLAGS_WARN_ALL</a> and
    AX_CFLAGS_WARN_ALL_ANSI
   </p>
   <p>
    For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The result
    is added to the shellvar being CFLAGS by default.
   </p>
   <p>
    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.
   </p>
   <pre>
 - $1 shell-variable-to-add-to : CFLAGS
 - $2 add-value-if-not-found : nothing
 - $3 action-if-found : add value to shellvariable
 - $4 action-if-not-found : nothing
</pre>
  </div>
  <h2>
   Author
  </h2>
  <p class="indent">
   Guido U. Draheim &lt;guidod@gmx.de&gt;
  </p>
  <h2>
   Last Modified
  </h2>
  <p class="indent">
   2008-04-12
  </p>
  <h2>
   Cross References
  </h2>
  <p class="indent">
   <img src="group8-xrefs.png" alt="group8-xrefs.png" usemap="#group8"><map id=
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    <area shape="poly" href="ax_cflags_warn_all_ansi.html" title=
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  </p>
  <h2>
   M4 Source Code
  </h2>
  <div class="indent">
   <pre class="m4source">
AC_DEFUN([AX_CFLAGS_WARN_ALL_ANSI],[dnl
AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all_ansi])dnl
AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum ansi warnings],
VAR,[VAR="no, unknown"
 AC_LANG_SAVE
 AC_LANG_C
 ac_save_[]FLAGS="$[]FLAGS"
# IRIX C compiler:
#      -use_readonly_const is the default for IRIX C,
#       puts them into .rodata, but they are copied later.
#       need to be "-G0 -rdatashared" for strictmode but
#       I am not sure what effect that has really.         - guidod
for ac_arg dnl
in "-pedantic  % -Wall -ansi -pedantic"       dnl   GCC
   "-xstrconst % -v -Xc"                      dnl Solaris C
   "-std1      % -verbose -w0 -warnprotos -std1" dnl Digital Unix
   " % -qlanglvl=ansi -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
   " % -ansi -ansiE -fullwarn"                dnl IRIX
   "+ESlit     % +w1 -Aa"                     dnl HP-UX C
   "-Xc        % -pvctl[,]fullmsg -Xc"        dnl NEC SX-5 (Super-UX 10)
   "-h conform % -h msglevel 2 -h conform"    dnl Cray C (Unicos)
   #
do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
   AC_TRY_COMPILE([],[return 0;],
   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
done
 FLAGS="$ac_save_[]FLAGS"
 AC_LANG_RESTORE
])
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&gt;&amp;1 &gt;/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_ANSI],[dnl
AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all_ansi])dnl
AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum ansi warnings],
VAR,[VAR="no, unknown"
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 ac_save_[]FLAGS="$[]FLAGS"
# IRIX C compiler:
#      -use_readonly_const is the default for IRIX C,
#       puts them into .rodata, but they are copied later.
#       need to be "-G0 -rdatashared" for strictmode but
#       I am not sure what effect that has really.         - guidod
for ac_arg dnl
in "-pedantic  % -Wall -ansi -pedantic"       dnl   GCC
   "-xstrconst % -v -Xc"                      dnl Solaris C
   "-std1      % -verbose -w0 -warnprotos -std1" dnl Digital Unix
   " % -qlanglvl=ansi -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
   " % -ansi -ansiE -fullwarn"                dnl IRIX
   "+ESlit     % +w1 -Aa"                     dnl HP-UX C
   "-Xc        % -pvctl[,]fullmsg -Xc"        dnl NEC SX-5 (Super-UX 10)
   "-h conform % -h msglevel 2 -h conform"    dnl Cray C (Unicos)
   #
do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
   AC_TRY_COMPILE([],[return 0;],
   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
done
 FLAGS="$ac_save_[]FLAGS"
 AC_LANG_RESTORE
])
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&gt;&amp;1 &gt;/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
])
</pre>
  </div>
  <h2>
   License
  </h2>
  <div class="indent">
   <span style="white-space:nowrap;">Copyright &copy; 2008 Guido U. Draheim
   &lt;guidod@gmx.de&gt;</span>
   <p>
    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.
   </p>
   <p>
    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.
   </p>
   <p>
    You should have received a copy of the GNU General Public License along
    with this program. If not, see &lt;<a href=
    "http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>&gt;.
   </p>
   <p>
    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
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    use of the material that constitutes the Autoconf Macro.
   </p>
   <p>
    This special exception to the GPL applies to versions of the Autoconf Macro
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