I've just tried building RC1 on OSX 10.4 (Intel), and it fails almost immediately. This did not fail in the past with beta5 or from SVN: Osoyoos:~/Development/numpy-1.0rc1 chris$ python setup.py build Running from numpy source directory. F2PY Version 2_3198 blas_opt_info: FOUND: extra_link_args = ['-Wl,-framework', '-Wl,Accelerate'] define_macros = [('NO_ATLAS_INFO', 3)] extra_compile_args = ['-msse3', '-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 = ['-msse3'] running build running config_fc running build_src building py_modules sources creating build creating build/src.darwin-8.7.1-i386-2.4 creating build/src.darwin-8.7.1-i386-2.4/numpy creating build/src.darwin-8.7.1-i386-2.4/numpy/distutils building extension "numpy.core.multiarray" sources creating build/src.darwin-8.7.1-i386-2.4/numpy/core Generating build/src.darwin-8.7.1-i386-2.4/numpy/core/config.h customize NAGFCompiler customize AbsoftFCompiler customize IbmFCompiler Could not locate executable g77 Could not locate executable f77 Could not locate executable f95 customize GnuFCompiler customize Gnu95FCompiler customize Gnu95FCompiler customize Gnu95FCompiler using config C compiler: gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd -fPIC -fno-common -dynamic -DNDEBUG -g -O3 -Wall - Wstrict-prototypes compile options: '-I/Library/Frameworks/Python.framework/Versions/2.4/ include/python2.4 -Inumpy/core/src -Inumpy/core/include -I/Library/ Frameworks/Python.framework/Versions/2.4/include/python2.4 -c' gcc: _configtest.c gcc: installation problem, cannot exec `cc1': No such file or directory gcc: installation problem, cannot exec `cc1': No such file or directory failure. removing: _configtest.c _configtest.o Traceback (most recent call last): File "setup.py", line 89, in ? setup_package() File "setup.py", line 82, in setup_package configuration=configuration ) File "/Users/chris/Development/numpy-1.0rc1/numpy/distutils/ core.py", line 174, in setup return old_setup(**new_attr) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/core.py", line 149, in setup dist.run_commands() File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/dist.py", line 946, in run_commands self.run_command(cmd) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/dist.py", line 966, in run_command cmd_obj.run() File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/command/build.py", line 112, in run self.run_command(cmd_name) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/cmd.py", line 333, in run_command self.distribution.run_command(command) File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/distutils/dist.py", line 966, in run_command cmd_obj.run() File "/Users/chris/Development/numpy-1.0rc1/numpy/distutils/ command/build_src.py", line 87, in run self.build_sources() File "/Users/chris/Development/numpy-1.0rc1/numpy/distutils/ command/build_src.py", line 106, in build_sources self.build_extension_sources(ext) File "/Users/chris/Development/numpy-1.0rc1/numpy/distutils/ command/build_src.py", line 212, in build_extension_sources sources = self.generate_sources(sources, ext) File "/Users/chris/Development/numpy-1.0rc1/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 -- Christopher Fonnesbeck + Atlanta, GA + fonnesbeck at mac.com + Contact me on AOL IM using email address