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generated...
2007-08-05

(C) 2007 guidod
Download the M4 Source.

ax_subst_with

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Synopsis
AX_SUBST_WITH([varname])
, 
Version

2006-10-13

Author

Guido U. Draheim <guidod@gmx.de>

License

GPLWithACException
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. 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

Category

cryp.to ac-archive's C Support (released)

Documentation

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.

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

WITH_ENABLE_CALL="" ; WITHOUT_ENABLE_CALL="#"

which you can use in your Makefile quite easily as if using an AM_CONDITIONAL but which can be also parsed by normal make

USE = @WITH_ENABLE_CALL@ -Denabled USE = @WITHOUT_ENABLE_CALL@ -Dnot_enabled

M4 Source Code
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
])