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AX_ENABLE_BUILDDIR [(dirstring-or-command [, [,-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 =
  $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-detection through ‘config.guess‘ and build-time of course, as in

  make HOST=i386-mingw-cross

which can of course set at configure time as well using

  configure --host=i386-mingw-cross

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 = 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 overridden 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.

Source Code

Download the latest version of ax_enable_builddir.m4 or browse the macro’s revision history.


Copyright © 2009 Guido U. Draheim
Copyright © 2009 Alan Jenkins

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 3 of the License, or (at your option) any later version.

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