Re: gnulib:test-stdalign failing on powerpc-darwin8, gcc-4.0

[David Fang]

Paul and all,

        PEBKAC.

	So I finally dug deeper into these compilation issues and with 
-save-temps, discovered that I had patched the wrong stdalign.in.h. 
Apparently, GNUTLS-3.3.9 ships two copies of it, and I patched the one 
that was NOT used by test-stdalign.  After applying your patch to both 
copies in gnutls, test-stdalign passes, as does everything else.
        Thanks for your gnulib patch!

Fang

> David Fang wrote:
> >  Hi Paul,
> >       I tried applying the patch (just the stdalign.in.h bit) to the
> >  powerpc-darwin8 build, but I still see (when changing the assert to
> >  printf):
>
> Can you deduce why the fix didn't work?  It should have inserted this:
>
> >  +#elif (defined __APPLE__ && defined __MACH__                  \
> >  +         ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__)                 \
> >  +         : __GNUC__)
>
> and that should be false on your platform because __APPLE__ and __MACH__ 
> should be defined, __GNUC__ should be 4, and __GNUC_MINOR__ should be zero. 
> Why is it true?  What are the values of __APPLE__, etc.?  That is, what is 
> the output of running 'gcc -E foo.c | tail' when foo.c contains the 
> following?
>
> #include <stdio.h>
> "__GNUC__" __GNUC__
> "__GNUC_MINOR__" __GNUC_MINOR__
> "__APPLE__" __APPLE__
> "__MACH__" __MACH__

--
David Fang
http://www.csl.cornell.edu/~fang/