[I am not on this list, so please cc me.] On OS X 10.7.2, gcc (GCC) 4.7.0 20120115 from SVN compiles using the /usr/bin/gcc -> llvm-gcc-4.2 that is installed by Xcode 4.2.1.
But if one first compiles GCC 4.6.2 using the same LLVM-GCC, then this GCC 4.7 will not compile; there is a configure error: checking for long long... yes checking size of long long... configure: error: in `/usr/local/src/gcc/gcc/host-x86_64-apple-darwin11.2.0/gcc': configure: error: cannot compute sizeof (long long) See `config.log' for more details. The config.log of this directory just indicates a program doing the check that will fail (now overwritten by new ./configure && make). Hans
