config.h symbols redefinition

[Massimo Manghi <ma...@unipr.it>]

as those who compiled Rivet for Apache2 might have noticed, there
are many conflicting definitions between rivet's autotools generated
config.h and apache's same file.

I'm experimenting with the macro AX_PREFIX_CONFIG_H
taken from the autotools macro archive
(a GPLed project visible at http://git.cryp.to/autoconf-archive)
that is able to rename config.h into whatever you tell it to do.
This macro renames the preprocessor symbols in <whatever_config.h>
by prefixing them with a predefined string that defaults to the project name
as defined in AC_INIT. The people working on this project were very helpful
and I will look into their site more closely for other stuff which we
might benefit from.

The implications are quite simple: the macro should be added to the 
repository
(I put it in a m4 directory for possible inclusions of other macros) and
various things  have to be changed in the code.  I'm in the process of  
doing  it
and it looks like a straightforward task. I just wonder  what is  your  
opinion
and if ther's some general objection raised against this before
proceeding with a commit of these changes.

ciao

 -- Massimo


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