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Autoconf Macro: ax_enable_builddir
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<h1>
ax_enable_builddir
</h1>
<h2>
SYNOPSIS
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_ENABLE_BUILDDIR [(dirstring-or-command [,Makefile.mk
[,-all]])]</code>
</p>
<h2>
DESCRIPTION
</h2>
<div class="indent">
<p>
If the current configure was run within the srcdir then we move all
configure-files into a subdir and let the configure steps continue there.
We provide an option --disable-builddir to suppress the move into a
separate builddir.
</p>
<p>
Defaults:
</p>
<pre>
$1 = $host (overridden with $HOST)
$2 = Makefile.mk
$3 = -all
</pre>
<p>
This macro must be called before AM_INIT_AUTOMAKE. It creates a default
toplevel srcdir Makefile from the information found in the created toplevel
builddir Makefile. It just copies the variables and rule-targets, each
extended with a default rule-execution that recurses into the build
directory of the current "HOST". You can override the auto-dection through
`config.guess` and build-time of course, as in
</p>
<pre>
make HOST=i386-mingw-cross
</pre>
<p>
which can of course set at configure time as well using
</p>
<pre>
configure --host=i386-mingw-cross
</pre>
<p>
After the default has been created, additional rules can be appended that
will not just recurse into the subdirectories and only ever exist in the
srcdir toplevel makefile - these parts are read from the $2 = Makefile.mk
file
</p>
<p>
The automatic rules are usually scanning the toplevel Makefile for lines
like '#### $host |$builddir' to recognize the place where to recurse into.
Usually, the last one is the only one used. However, almost all targets
have an additional "*-all" rule which makes the script to recurse into
_all_ variants of the current HOST (!!) setting. The "-all" suffix can be
overriden for the macro as well.
</p>
<p>
a special rule is only given for things like "dist" that will copy the
tarball from the builddir to the sourcedir (or $(PUB)) for reason of
convenience.
</p>
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<h2>
SOURCE CODE
</h2>
<p class="indent">
<a href=
"http://autoconf-archive.cryp.to/ax_enable_builddir.m4">http://autoconf-archive.cryp.to/ax_enable_builddir.m4</a>
</p>
<h2>
LICENSE
</h2>
<div class="indent">
<p style="white-space:nowrap;">
Copyright © 2009 Guido U. Draheim <guidod@gmx.de><br>
Copyright © 2009 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
</p>
<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 <<a href=
"http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>>.
</p>
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As a special exception, the respective Autoconf Macro's copyright owner
gives unlimited permission to copy, distribute and modify the configure
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distributing such scripts, even though portions of the text of the Macro
appear in them. The GNU General Public License (GPL) does govern all other
use of the material that constitutes the Autoconf Macro.
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