latest snapshot won't find C++ header files

[Alexandre Oliva]

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

>   In message < orzpb8rrxw.fsf@araguaia.dcc.unicamp.br >you write:

>> I see, but the assumption that exec_prefix must be prefix or a
>> subdirectory thereof may break existing behavior; isn't it too strong?

>> Anyway, here's a patch that should simplify things...  Ok to install?

> Let's slow down a little.  I don't see that anything got simpler,
> particularly when we also deal with Manfred's problem.

I'm just trying to make the Makefile consistent and homogeneous.  The
current Makefile produces inconsistent behavior (i.e., different
search dirs) depending on whether you enable cpplib or not, it breaks
support for --with-gxx-include-dir and --with-local-prefix, and it
causes cppp to search for C++ header-files in the wrong directory.

The patch I have submitted is supposed to fix the gxx-include-dir
problem, but not the local-includes one.  It might be incomplete, in
the sense that it doesn't handle the case in which exec_prefix is
unrelated with prefix, but then, neither does the current code.
Furthermore, if one is going to fix it in the future, it will be
easier to fix it if the fix is the same everywhere, which is why I say
my patch makes it simpler.

Please look again at my patch and notice that I'm only factoring the
changes introduced by the unlibsubdir patch into gxx_include_dir,
includedir and tooldir, and propagating them into other targets (such
as cpplib) that were not updated to the unlibsubdir patch.

-- 
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:oliva@gnu.org mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil