Re: building directly from $(top_builddir)

[Bruno Haible]

Eric Blake wrote:
> gnulib-tool could make this part easier by automating it somehow (a new
> command line option to state whether the gnulib.mk fragment will be used
> in the current directory [default], or included from some other directory
> where all relative paths need an extra prefix [as in bison's case]).

Such a feature would require changes (to insert $prefix here and there) in
many places, i.e. in many module descriptions. That's hardly maintainable
(and rarely tested, since most gnulib users would not use this feature).

The alternative quite easy: Just include a tiny Makefile.am in the
subdirectory, that does

   include gnulib.mk

and invoke that Makefile from the top-level directory, by use of
AC_CONFIG_SUBDIRS.

Does bison have any specific problems following this approach that
everyone else has used so far?

Bruno