once we have cpplib...

[Ulrich Drepper]

Jeffrey A Law <law@cygnus.com> writes:

> Well, I find -V a nice thing to have, but I don't mind breaking it
> for something this significant.  Or just make cpp a trivial program
> that calls gcc with the right arguments to put it into "cpp" mode :-)

I think there is an easy way to keep compatibility.  When the
integrated cpp is supposed to be used give cc1 (cc1plus, ...) an extra
argument.  This is of course in the specs file.  Without the extra
argument preprocessed input is assumed.  With the argument use the
builtin cpplib.  This piece of information shouldn't be part of the
regular options but in a new category which is simply ignored by old
drivers.  Say, add

*cpplib:
-use-cpplib

to the specs file and make gcc/g77/... use this field whenever
preprocessing is necessary.

-- Uli
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Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
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