Re: autoheader failing with multiple source AC_CONFIG_HEADERS

[Ross Burton]

On Fri, 2007-06-15 at 16:24 -0700, Noah Misch wrote:
> > 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])

How about looking at the input headers for a filename that is the output
header with ".in" appended, just like it does when there is no set of
input headers.  When there is no such file, it should not generate
anything.

> 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.

Cunning.  I worked around my problem another way, but this is a good
idea.

Ross
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Ross Burton                                 mail: address@hidden
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