* Dave Hart wrote on Tue, Jan 18, 2011 at 10:13:21PM CET:
> When invoked by autoreconf of a project with nested configure.ac
> files, automake does not respect the disabling of AC_CONFIG_FILES by
> the top-level configure.ac using AM_COND_IF, resulting in an incorrect
> Makefile. Re-running autoreconf from within the nested project
> produces correct output.
I think the underlying issue is the following:
AM_COND_IF([COND], [... AC_CONFIG_FILES([M]) ...])
can only help to conditionalize the regeneration rules for M that are
produced by automake; that is a decision that can be done at configure
run time. What you need is something that is decided at automake run
time, more precisely at autoconf --trace'ing time. AM_COND_IF cannot be
that, because COND is by definition only decided at configure time.
You'd need something like
m4_if([my_m4_variable], [value],
[AC_CONFIG_FILES([M])])
with a condition that is evaluated at m4 run time.
I don't think you need AM_COND_IF then at all.
Hope that helps.
Cheers,
Ralf
