Preprocessing oddity breaks binutils

[mark@codesourcery.com]

>>>>> "Andreas" == Andreas Schwab <schwab@issan.cs.uni-dortmund.de> writes:

    Andreas> Thus the current behaviour of cpp is more in the spirit
    Andreas> of the standard, and IMHO cpplib is wrong.

I disagree, but clearly the standard does not really specify behavior
here.

My original example indicates how hard it is to forsee what might
happen, given the current behavior.  In particular, in a package that
has srcdir/objdir builds, if you have built once in the srcdir (or if
the package distributes generated files in the srcdir), and you then
build in an objdir, all yacc-generated files get the wrong header.
What you have yacc to to work around this problem?  Generate #line's
that refer to the objdir, rather than the srcdir?  But, that's not
where the source actually *is*, so then debugging wouldn't work.  I
suppose you could insert a #line for the objdir right before
#include'ing the header, but why should you have to?

There's really no way to resolve this debate, so I don't intend to
argue the point any further.  I'm happy to leave it in Dave and
Zack's capable hands!

--
Mark Mitchell                   mark@codesourcery.com
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