I've tried asking this on the numpy list (a few times), but unfortunately no response. Since the error *appears* to be inside distutils, I thought maybe someone here would recognize it. Anyway, I'm trying to build the lastest numpy RC with Python 2.5 on OS X 10.3.9, and this is the fun that occurrs: jayparlar$ python setup.py build Running from numpy source directory. F2PY Version 2_3296 blas_opt_info: FOUND: extra_link_args = ['-Wl,-framework', '-Wl,Accelerate'] define_macros = [('NO_ATLAS_INFO', 3)] extra_compile_args = ['-faltivec', '-I/System/Library/Frameworks/vecLib.framework/Headers'] lapack_opt_info: FOUND: extra_link_args = ['-Wl,-framework', '-Wl,Accelerate'] define_macros = [('NO_ATLAS_INFO', 3)] extra_compile_args = ['-faltivec'] running build running config_fc running build_src building py_modules sources creating build creating build/src.macosx-10.3-fat-2.5 creating build/src.macosx-10.3-fat-2.5/numpy creating build/src.macosx-10.3-fat-2.5/numpy/distutils building extension "numpy.core.multiarray" sources creating build/src.macosx-10.3-fat-2.5/numpy/core Generating build/src.macosx-10.3-fat-2.5/numpy/core/config.h customize NAGFCompiler customize AbsoftFCompiler customize IbmFCompiler Could not locate executable g77 Could not locate executable f77 Could not locate executable gfortran Could not locate executable f95 customize GnuFCompiler customize Gnu95FCompiler customize G95FCompiler customize GnuFCompiler customize Gnu95FCompiler customize NAGFCompiler customize NAGFCompiler using config C compiler: gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd -fno-common -dynamic -DNDEBUG -g -O3 compile options: '-I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -Inumpy/core/src -Inumpy/core/include -I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -c' gcc: _configtest.c gcc: cannot specify -o with -c or -S and multiple compilations gcc: cannot specify -o with -c or -S and multiple compilations failure. removing: _configtest.c _configtest.o numpy/core/setup.py:50: DeprecationWarning: raising a string exception is deprecated raise "ERROR: Failed to test configuration" Traceback (most recent call last): File "setup.py", line 89, in <module> setup_package() File "setup.py", line 82, in setup_package configuration=configuration ) File "/Users/jayparlar/Desktop/numpy-1.0rc2/numpy/distutils/core.py", line 174, in setup return old_setup(**new_attr) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/core.py", line 151, in setup dist.run_commands() File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/dist.py", line 974, in run_commands self.run_command(cmd) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/dist.py", line 994, in run_command cmd_obj.run() File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/command/build.py", line 112, in run self.run_command(cmd_name) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/cmd.py", line 333, in run_command self.distribution.run_command(command) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/distutils/dist.py", line 994, in run_command cmd_obj.run() File "/Users/jayparlar/Desktop/numpy-1.0rc2/numpy/distutils/command/build_src.py", line 87, in run self.build_sources() File "/Users/jayparlar/Desktop/numpy-1.0rc2/numpy/distutils/command/build_src.py", line 106, in build_sources self.build_extension_sources(ext) File "/Users/jayparlar/Desktop/numpy-1.0rc2/numpy/distutils/command/build_src.py", line 212, in build_extension_sources sources = self.generate_sources(sources, ext) File "/Users/jayparlar/Desktop/numpy-1.0rc2/numpy/distutils/command/build_src.py", line 270, in generate_sources source = func(extension, build_dir) File "numpy/core/setup.py", line 50, in generate_config_h raise "ERROR: Failed to test configuration" ERROR: Failed to test configuration Jay-Computer:~/Desktop/numpy-1.0rc2 jayparlar$ It's failing on this: result = config_cmd.try_run(tc,include_dirs=[python_include], library_dirs = default_lib_dirs) if not result: raise "ERROR: Failed to test configuration" Here, config_cmd is a distutils.command.config.try_run Does anyone recognize this error? I'm looking in the direction of the "gcc: cannot specify -o with -c or -S and multiple compilations" as the root of my problem. Some weird combination of gcc3.3, Python2.5 and OS X 10.3.9 seems to be causing it. I'd really appreciate any insight into this, but totally understand if no one has any ideas :) Jay P.