The current implementation of the configuration system "compiles" the
configuration parameters to macros defined on the command line. This
works, but has a few limitations:
- it can bring back the maximum command line length issues in Windows.
- depending on the type of the configuration parameter, it might require
special quoting of its value in the command line.
- various 3rd party IDE/tools seem to have some limitations regarding
the total length of the macros that can be defined.
This commit is the first step in replacing the current mechanism with
one that generates configuration in header files that will be
automatically included, instead of command line macro definitions. The
commit only adds the method for generating the header file, it doesn't
actually change the way config is used yet (that will happen in step 2),
thus it is backwards compatible. The logic of the configuration system
itself is unchanged (in fact, the whole change (not only this commit) is
supposed to be completely transparent for the users of the configuration
system).
The commit also fixes an issue in tools/get_config.py that appeared as a
result of a recent PR: the signature of "get_config" in
tools/build_api.py changed, but tools/get_config.py was not updated.
Anna Bridge
Jimmy Brisson
Brian Daniels
Sam Grove
Bogdan Marinescu
Mihail Stoyanov