Question on Tuning and Preprocessor Definitions

[Jeffrey Walton]

Hi All,

I just noticed __tune_core2__ from `cpp -dM < /dev/null` on a Mac.

Can we presume an mtune options [1] (ie, -mtune=XXX) have a
corresponding __tune_XXX__ preprocessor definition which GCC
recognizes?

Google is only showing a handful of hits (mostly patches) on GNU's site [2].

Jeff

[1] http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html
[2] http://www.google.com/#sclient=psy&source=hp&q=%22__tune_core2__%22+site:gcc.gnu.org