Hello, I'm trying to do a simple test with f2py, using the Hermite polynomial example here: http://www.scipy.org/Cookbook/F2Py I cannot figure out how to configure the compile/build commands to work with my system. I'm a novice at this stuff, so please bear with me... I'm running on Mac OS X, and since the Xcode compiler does not include fortran, I have the version 4.4 of gcc installed from MacPorts. So my compilers should be /opt/local/bin/gcc-mp-4.4 and gfortran-mp-4.4, and the associated lib/include directories are also under /opt. I've used this to compile other fortran programs so I am confident it is installed correctly. Now, I downloaded that hermite polynomial code, and the first command (f2py -m hermite -h hermite.pyf hermite.f) runs fine. I'm stuck on the second command that is supposed to compile the code and create the .so file. The keyword arguments to f2py (-f90exec, -compiler) don't seem to help but it appears to read shell variables, so the farthest I could get was to do the following: CC=/opt/local/bin/gcc-mp-4.4 F90=/opt/local/bin/gfortran-mp-4.4 f2py --verbose -c hermite.pyf hermite.f In verbose mode it prints out the contents of the distutils objects, and it looks like it is getting the correct compiler paths, but things are still garbled because certain things appear to still reference the Xcode compiler - here is a piece of the distutils content printed by f2py: ******************************************************************************** distutils.unixccompiler.UnixCCompiler linker_exe = ['/opt/local/bin/gcc-mp-4.4'] compiler_so = ['/opt/local/bin/gcc-mp-4.4', '-fno-strict-aliasing', '-fno-common', '-dynamic', '-arch', 'i386', '-isysroot', '/Developer/SDKs/MacOSX10.5.sdk', '-DNDEBUG', '-g', '-O3', '-arch', 'i386', '-isysroot', '/Developer/SDKs/MacOSX10.5.sdk'] So it has the correct path to the MacPorts gcc but then the flags are not correct since those refer to Xcode; it causes a stop error because gcc-mp-4.4 has no -arch flag. My guess is that I have to figure out how to change those flags - which probably means modifying the distutils calls somehow. Has anyone dealt this issue before, and maybe has some pointers on where to look? It is not clear to me how any of the f2py command line flags will modify these things, and I don't see how to setup my own 'UnixCCompiler' object that has the correct flags. Thanks, Aronne