I'm trying to compile a Python package which has some Cython-generated C code, and I'm running into: gcc: error: x86_64: No such file or directory which indicates that the gcc compiler is too recent, so doesn't support -arch anymore. I tried setting CC=/usr/bin/gcc prior to python setup.py install, and this works for the main compile command, but not for the command to make the shared object library: % setenv CC /usr/bin/gcc % python setup.py install running install running build running build_py running build_ext skipping 'hyperion/util/integrate_core.c' Cython extension (up-to-date) building 'hyperion.util.integrate_core' extension /usr/bin/gcc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.5.sdk -DNDEBUG -g -O3 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.5.sdk -I/Library/Frameworks/EPD64.framework/Versions/7.2/lib/python2.7/site-packages/numpy/core/include -I/Library/Frameworks/EPD64.framework/Versions/7.2/include/python2.7 -c hyperion/util/integrate_core.c -o build/temp.macosx-10.5-x86_64-2.7/hyperion/util/integrate_core.o gcc -bundle -undefined dynamic_lookup -g -arch x86_64 -arch x86_64 build/temp.macosx-10.5-x86_64-2.7/hyperion/util/integrate_core.o -o build/lib.macosx-10.5-x86_64-2.7/hyperion/util/integrate_core.so gcc: error: x86_64: No such file or directory gcc: error: x86_64: No such file or directory gcc: error: unrecognized option ‘-arch’ gcc: error: unrecognized option ‘-arch’ error: command 'gcc' failed with exit status 1 Is there a way to specify the absolute path of the compiler to use for linking? Continue reading...