On 19 Sep 2007 09:17:13 -0700, Ian Lance Taylor <iant@google.com> wrote: > "Lu Fan" <carboy.lu@gmail.com> writes: > > > where is the Macro __GNUC__ defined ? > > > > I search it in the whole gcc source code ,but I can't find out. > > It's defined in gcc/c-cppbuiltin.c, in the function define__GNUC__. > > Ian > Got it. Thanks a lot :)