better error messages for erroneous local C headers Addresses the issue in tickets #532, #648. When the all-together test of C libraries and headers fails, use only the preprocessor to probe the headers individually.  If they all check out, give a more equivocal error message and suggest -v3.
better error messages for erroneous local C headers
Addresses the issue in tickets #532, #648.
When the all-together test of C libraries and headers fails, use only the
preprocessor to probe the headers individually.  If they all check out,
give a more equivocal error message and suggest -v3.



IreneKnapp/Faction,IreneKnapp/Faction