AX_ENABLE_BUILDDIR [(dirstring-or-command [,Makefile.mk [,-all]])]
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.
$1 = $host (overridden with $HOST) $2 = Makefile.mk $3 = -all
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
which can of course set at configure time as well using
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
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.
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.
Download the latest version of ax_enable_builddir.m4 or browse the macro’s revision history.
Copyright © 2009 Guido U. Draheim firstname.lastname@example.org
Copyright © 2009 Alan Jenkins email@example.com
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