@node ax_configure_args
@unnumberedsec ax_configure_args

@majorheading Synopsis

@smallexample
AX_CONFIGURE_ARGS
@end smallexample

@majorheading Description

Helper macro for AX_ENABLE_BUILDDIR.

The traditional way of starting a subdir-configure is running the script
with $@{1+"$@@"@} but since autoconf 2.60 this is broken. Instead we have
to rely on eval'ing $ac_configure_args however some old autoconf
versions do not provide that. To ensure maximum portability of autoconf
extension macros this helper can be AC_REQUIRE'd so that
$ac_configure_args will always be present.

Sadly, the traditional "exec $SHELL" of the enable_builddir macros is
spoiled now and must be replaced by "eval + exit $?".

Example:

@smallexample
  AC_DEFUN([AX_ENABLE_SUBDIR],[dnl
    AC_REQUIRE([AX_CONFIGURE_ARGS])dnl
    eval $SHELL $ac_configure_args || exit $?
    ...])
@end smallexample

@majorheading Source Code

Download the
@uref{http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_configure_args.m4,latest
version of @file{ax_configure_args.m4}} or browse
@uref{http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=history;f=m4/ax_configure_args.m4,the
macro's revision history}.

@majorheading License

@w{Copyright @copyright{} 2008 Guido U. Draheim @email{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.