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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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<title>
Autoconf Macro: ax_subst_with
</title>
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<a href="http://autoconf-archive.cryp.to/ax_subst_with.m4">Download M4
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<hr>
<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 Draheim <guidod@gmx.de>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-01-22
</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" = "." && VAR_WITHVAL="m4_ifval([$2],[$2],no)"
test ".$VAR_WITHVAL" = ".:" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".0" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".no" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".false" && VAR_WITHVAL="no"
if test ".$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" = "." && VAR_WITHVAL="m4_ifval([$2],[$2],no)"
test ".$VAR_WITHVAL" = ".:" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".0" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".no" && VAR_WITHVAL="no"
test ".$VAR_WITHVAL" = ".false" && VAR_WITHVAL="no"
if test ".$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" = "." && 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" = "." && VAR="$2"])dnl
AX_SUBST_WITH_DEFINE([$1],[$2])
popdef([VAR])dnl
])
</pre>
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