an interesting idea, but...

[Andreas Schwab]

Zack Weinberg <zack@rabi.columbia.edu> writes:

|> Durning a build, cpp is invoked (number of active suffixes)+1 times
|> for each source file in the library.  Profiling suggests there would
|> be upwards of 25% improvement in build time from invoking it only
|> once.  This is easy to put into the makefiles, but there's a problem:
|> a lot of code cares about whether it's going into the static, shared,
|> or profiled library.  It finds out with #ifdefs.  If I run cpp once,
|> all this code is miscompiled.
|> 
|> Any thoughts on how to work around the problem?

Speeding up cpp would probably be easier.  Perhaps cpplib can help here.

Andreas.