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   Autoconf Macro: ax_subst_with
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  <h1>
   ax_subst_with
  </h1>
  <h2>
   Synopsis
  </h2>
  <p class="indent" style="white-space:nowrap;">
   <code>AX_SUBST_WITH([varname])</code>
  </p>
  <h2>
   Description
  </h2>
  <div class="indent">
   <p>
    a very simple macro but also very helpful - the varname is usually the one
    from an AC_ARG_ENABLE or AC_ARG_WITH option. it is transliterated into
    uppercase and a prefix WITH_ and WITHOUT_ that are both _SUBSTed.
   </p>
   <p>
    Only one of these is set to "#" while the other is empty. In other words a
    call like AC_WITHNONE(enable-call) will create two SUBST-symbols as
    WITH_ENABLE_CALL and WITHOUT_ENABLE_CALL. When the varname had been set to
    something not "no" or "0" or ":" or "false" then it results in
   </p>
   <pre>
 WITH_ENABLE_CALL="" ; WITHOUT_ENABLE_CALL="#"
</pre>
   <p>
    which you can use in your Makefile quite easily as if using an
    AM_CONDITIONAL but which can be also parsed by normal make
   </p>
   <p>
    USE = @WITH_ENABLE_CALL@ -Denabled USE = @WITHOUT_ENABLE_CALL@
    -Dnot_enabled
   </p>
  </div>
  <h2>
   Author
  </h2>
  <p class="indent">
   Guido U. Draheim &lt;guidod@gmx.de&gt;
  </p>
  <h2>
   Last Modified
  </h2>
  <p class="indent">
   2006-10-13
  </p>
  <h2>
   M4 Source Code
  </h2>
  <div class="indent">
   <pre class="m4source">
dnl AX_SUBST_WITH_IF(flag,cond) - not unlike AM_CONDITIONAL
AC_DEFUN([AX_SUBST_WITH_IF],[dnl
pushdef([VAR_WITH],    patsubst(translit([with_$1], [a-z], [A-Z]), -, _))dnl
pushdef([VAR_WITHOUT], patsubst(translit([without_$1], [a-z], [A-Z]), -, _))dnl
AC_SUBST(VAR_WITH)
AC_SUBST(VAR_WITHOUT)
if $2; then
    VAR_WITH=""
    VAR_WITHOUT="#"
else
    VAR_WITH="#"
    VAR_WITHOUT=""
fi
popdef([VAR_WITHOUT])dnl
popdef([VAR_WITH])dnl
])

dnl AX_SUBST_WITH(varname [,default]) - not unlike AM_CONDITIONAL
AC_DEFUN([AX_SUBST_WITH],[dnl
pushdef([VAR],         patsubst(translit([with_$1], [A-Z], [a-z]), -, _))dnl
pushdef([VAR_WITH],    patsubst(translit([with_$1], [a-z], [A-Z]), -, _))dnl
pushdef([VAR_WITHOUT], patsubst(translit([without_$1], [a-z], [A-Z]), -, _))dnl
pushdef([VAR_WITHVAL], patsubst(translit([withval_$1], [a-z], [A-Z]), -, _))dnl
AC_SUBST(VAR_WITH)
AC_SUBST(VAR_WITHOUT)
VAR_WITHVAL=`echo "$VAR"`
test ".$VAR_WITHVAL" = "."      &amp;&amp; VAR_WITHVAL="m4_ifval([$2],[$2],no)"
test ".$VAR_WITHVAL" = ".:"     &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".0"     &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".no"    &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".false" &amp;&amp; VAR_WITHVAL="no"
if test ".$VAR_WITHVAL" != ".no" ; then
    VAR_WITH=""
    VAR_WITHOUT="#"
else
    VAR_WITH="#"
    VAR_WITHOUT=""
fi
popdef([VAR_WITHVAL])dnl
popdef([VAR_WITHOUT])dnl
popdef([VAR_WITH])dnl
popdef([VAR])dnl
])

dnl AX_SUBST_WITH_DEFINE(varname [,default]) - not unlike AM_CONDITIONAL
AC_DEFUN([AX_SUBST_WITH_DEFINE],[dnl
pushdef([VAR],         patsubst(translit([with_$1], [A-Z], [a-z]), -, _))dnl
pushdef([VAR_WITH],    patsubst(translit([with_$1], [a-z], [A-Z]), -, _))dnl
pushdef([VAR_WITHOUT], patsubst(translit([without_$1], [a-z], [A-Z]), -, _))dnl
pushdef([VAR_WITHVAL], patsubst(translit([withval_$1], [a-z], [A-Z]), -, _))dnl
AC_SUBST(VAR_WITH)
AC_SUBST(VAR_WITHOUT)
VAR_WITHVAL=`echo "$VAR"`
test ".$VAR_WITHVAL" = "."      &amp;&amp; VAR_WITHVAL="m4_ifval([$2],[$2],no)"
test ".$VAR_WITHVAL" = ".:"     &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".0"     &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".no"    &amp;&amp; VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".false" &amp;&amp; VAR_WITHVAL="no"
if test ".$VAR_WITHVAL" != ".no" ; then
    VAR_WITH=""
    VAR_WITHOUT="#"
    case "$VAR_WITHVAL" in
    [[0123456789]]*)  ;;
    [yes)] VAR_WITHVAL="1" ;;
    [*)]   VAR_WITHVAL=`echo "\"$VAR_WITHVAL\"" | sed -e  's,"",",g'` ;;
  esac
else
    VAR_WITH="#"
    VAR_WITHOUT=""
fi
if test ".$VAR_WITHVAL" != ".no" ; then
      AC_DEFINE_UNQUOTED(VAR_WITH, $VAR_WITHVAL,
        [whether $1 feature is enabled])
fi dnl
popdef([VAR_WITHVAL])dnl
popdef([VAR_WITHOUT])dnl
popdef([VAR_WITH])dnl
popdef([VAR])dnl
])

dnl backward compatibility helpers
AC_DEFUN([AX_SUBST_WITH_ARG],[dnl
pushdef([VAR],    patsubst(translit([with_$1], [A-Z], [a-z]), -, _))dnl
m4_ifvaln([$2],[test ".$VAR" = "." &amp;&amp; VAR="$2"])dnl
AX_SUBST_WITH([$1],[$2])
popdef([VAR])dnl
])

AC_DEFUN([AX_SUBST_WITH_DEFINE_ARG],[dnl
pushdef([VAR],    patsubst(translit([with_$1], [A-Z], [a-z]), -, _))dnl
m4_ifvaln([$2],[test ".$VAR" = "." &amp;&amp; VAR="$2"])dnl
AX_SUBST_WITH_DEFINE([$1],[$2])
popdef([VAR])dnl
])
</pre>
  </div>
  <h2>
   License
  </h2>
  <div class="indent">
   <span style="white-space:nowrap;">Copyright &copy; 2006 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, write to the Free Software Foundation, Inc., 59
    Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   </p>
   <p>
    As a special exception, the respective Autoconf Macro's copyright owner
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