Re: bug#13495: Compilation fails on Mac OS X 10.8.0

[Karl Berry]

    > 1. This code isn't used - due to the combination of #if's.

Sorry if I'm missing the point here, but FWIW, my suggestion for
cpp-related debugging is to take the line from make for compiling the
file and change it to:
gcc -E -dD -o foobar  ...copy rest of cmdline from make output...

Then foobar will have the #define statements, in the context of the
regular preprocessed output, so you can see what is #defining what and
why. 
http://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html
(at -dCHARS, toward the end.)

(Or similar, for other compilers.  Sorry, I don't recall if you're using
gcc.)

Best,
karl