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Generic mechanism for dependencies of CPP processed files

From: Thomas Schwinge
Subject: Generic mechanism for dependencies of CPP processed files
Date: Fri, 13 Oct 2006 17:08:48 +0200
User-agent: Mutt/1.5.6+20040907i


Please comment on the following:

There are .defs files, which are meant to be preprocessed using the gcc
preprocessor and are afterwards fed to a tool that generates .c and
accompanying .h files from the interface descriptions in the .defs files.
As --- during preprocessing --- other .defs files and .h files
(containing #defines) are #included, dependency tracking is desirable
(read: required) for those files (and is implemented in the current
pre-Automake Makefile arrangement, by the way :-).

As far as I know there is currently no generic mechanism in Automake to
universally support dependency tracking of files that are processed using
the gcc preprocessor.  Have people already made thoughts about such a
mechanism or how is the above scenario commonly handled?


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