Hi, I am trying to compile gcc-4.6-2010408, and I get the following error: checking whether the C compiler works... configure: error: in `/Users/anna/Documents/programs/GCC/GCC/build/i386-apple-darwin10.7.0/x86_64 /libgcc': configure: error: cannot run C compiled programs. I am on Mac OS X 10.6.7, Intel Core Duo (NOT core 2 duo), and I have successfully built gmp-5.0.1, mpc-0.8.2 and mpfr-3.0.1. I used the following configure command: export GCC_LIBS_DIR=/Users/anna/Documents/programs/GCC/GCC/libs/install ../gcc-4.6-20110408/configure --prefix=$(cd ../install/ && pwd) --with-gmp=$GCC_LIBS_DIR --with-mpfr=$GCC_LIBS_DIR --with-mpc=$GCC_LIBS_DIR --disable-checking --enable-werror --enable-languages=c --disable-libquadmath If you need further details please let me know. Thanks & regards, Anna.