ax_subst_with
=============

Synopsis
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     AX_SUBST_WITH([varname])

Description
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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

Source Code
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Download the latest version of ax_subst_with.m4 (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_subst_with.m4) or browse the macro's revision history (http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=history;f=m4/ax_subst_with.m4).

License
*******

Copyright © 2008 Guido U. Draheim guidod@gmx.de

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.  This file is offered as-is, without any warranty.