Re: autoheader failing with multiple source AC_CONFIG_HEADERS

[Noah Misch]

On Thu, Jun 14, 2007 at 12:09:16PM +0100, Ross Burton wrote:
> I want to add some custom tests to config.h, so I do this:
> 
> AC_CONFIG_HEADERS([config.h:config.h.in:config.h.post])
> 
> Which I interpret from the documentation as generate config.h from
> config.h.in and config.h.post.

Correct.

> I have created config.h.post, and want
> autoheader to generate config.h.in.  However, when autoheader runs it
> creates a file called "config.h.in:config.h.post".

This is certainly the wrong behavior.  I'm not so sure of how to improve on it,
besides refusing to generate any header for this.  In your example, a human can
easily guess that `config.h.in' is the header to be generated.  Other cases will
be unclear; which header should `autoheader' generate of these?

AC_CONFIG_HEADERS([config.h:config.1:config.2:config.3:config.4])


For now, you can work around the problem like this:

1) Change configure.ac to use `AC_CONFIG_HEADERS([autoconfig.h])'.
2) Move `config.h.post' to `config.h' and add `#include <autoconfig.h>' up top.

If you need defines substituted into the current content of config.h.post,
you'll need to shuffle things a bit more.