building object from .cc or .c based on conditional [PATCH]

[Richard Boulton]

Currently, if you attempt to build an object, say foo.$(OBJEXT), from one
of two separate source files, foo.cc and foo.c, based on a conditional,
automake fails with:
Makefile.am: object `foo.$(OBJEXT)' created by `foo.c' and `foo.cc'

I don't see any reason why this should be prohibited, since I think it
could be implemented fairly easily.  I am therefore proposing the following
patch, which adds a test case to check this behaviour to XFAIL_TESTS.

It seems low priority, but worth keeping track of in this way.

-- 
Richard

patch4
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