I'm trying to build gcc 4.7.1 on a Sandybridge system, running RHEL6.2 Doesn't seem to matter what I do, I always get this error... mkdir -p -- x86_64-unknown-linux-gnu/libgcc Checking multilib configuration for libgcc... Configuring stage 1 in x86_64-unknown-linux-gnu/libgcc configure: creating cache ./config.cache checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking for --enable-version-specific-runtime-libs... no checking for a BSD-compatible install... /usr/bin/install -c checking for gawk... gawk checking for x86_64-unknown-linux-gnu-ar... ar checking for x86_64-unknown-linux-gnu-lipo... lipo checking for x86_64-unknown-linux-gnu-nm... /mops/linux/gcc/gcc-4.7.1/buildobjs/./gcc/nm checking for x86_64-unknown-linux-gnu-ranlib... ranlib checking for x86_64-unknown-linux-gnu-strip... strip checking whether ln -s works... yes checking for x86_64-unknown-linux-gnu-gcc... /mops/linux/gcc/gcc-4.7.1/buildobjs/./gcc/xgcc -B/mops/linux/gcc/gcc-4.7.1/buildobjs/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include checking for suffix of object files... configure: error: in `/mops/linux/gcc/gcc-4.7.1/buildobjs/x86_64-unknown-linux-gnu/libgcc': configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[2]: *** [configure-stage1-target-libgcc] Error 1 My configure command looks like (taken from: http://gcc.gnu.org/ml/gcc-testresults/2012-06/msg01675.html ) # ../configure --host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu --enable-__cxa_atexit --enable-stage1-languages=c --enable-libssp --enable-targets=x86_64-unknown-linux-gnu --with-gc=page --disable-multilib --enable-nls --enable-threads=posix --prefix=/usr/local --enable-shared --libdir=/usr/local/lib --with-system-zlib --with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib --with-mpfr-include=/usr/local/include --with-mpfr-lib=/usr/local/lib --with-mpc-include=/usr/local/include --with-mpc-lib=/usr/local/lib --libexecdir=/usr/local/libexec --with-local-prefix=/usr/local/include --with-gxx-include-dir=/usr/local/include --enable-languages=c,c++,objc,fortran,go --enable-bootstrap Thanks for any help! Mark