Numpy doesn't seem to be finding my atlas install. Have I done something wrong or misunderstood? $ cd /usr/lib $ ls libatlas* libatlas.a libatlas.so libatlas.so.3gf libatlas.so.3gf.0 $ ls libf77* libf77blas.a libf77blas.so libf77blas.so.3gf libf77blas.so.3gf.0 $ ls libcblas* libcblas.a libcblas.so libcblas.so.3gf libcblas.so.3gf.0 $ ls liblapack* liblapack-3.a liblapack.a liblapack_atlas.so liblapack_atlas.so.3gf.0 liblapackgf-3.so liblapack.so.3gf liblapack-3.so liblapack_atlas.a liblapack_atlas.so.3gf liblapackgf-3.a liblapack.so liblapack.so.3gf.0 Since these are all in the standard locations, I am building without a site.cfg. Here is the beginning info: Running from numpy source directory. non-existing path in 'numpy/distutils': 'site.cfg' F2PY Version 2_5972 blas_opt_info: blas_mkl_info: libraries mkl,vml,guide not found in /usr/local/lib libraries mkl,vml,guide not found in /usr/lib NOT AVAILABLE atlas_blas_threads_info: Setting PTATLAS=ATLAS NOT AVAILABLE atlas_blas_info: NOT AVAILABLE /tmp/numpy/numpy/distutils/system_info.py:1340: UserWarning: Atlas (http://math-atlas.sourceforge.net/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [atlas]) or by setting the ATLAS environment variable. warnings.warn(AtlasNotFoundError.__doc__) blas_info: libraries blas not found in /usr/local/lib FOUND: libraries = ['blas'] library_dirs = ['/usr/lib'] language = f77 FOUND: libraries = ['blas'] library_dirs = ['/usr/lib'] define_macros = [('NO_ATLAS_INFO', 1)] language = f77 lapack_opt_info: lapack_mkl_info: mkl_info: libraries mkl,vml,guide not found in /usr/local/lib libraries mkl,vml,guide not found in /usr/lib NOT AVAILABLE NOT AVAILABLE atlas_threads_info: Setting PTATLAS=ATLAS numpy.distutils.system_info.atlas_threads_info NOT AVAILABLE atlas_info: numpy.distutils.system_info.atlas_info NOT AVAILABLE /tmp/numpy/numpy/distutils/system_info.py:1247: UserWarning: Atlas (http://math-atlas.sourceforge.net/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [atlas]) or by setting the ATLAS environment variable. warnings.warn(AtlasNotFoundError.__doc__) lapack_info: libraries lapack not found in /usr/local/lib FOUND: libraries = ['lapack'] library_dirs = ['/usr/lib'] language = f77 FOUND: libraries = ['lapack', 'blas'] library_dirs = ['/usr/lib'] define_macros = [('NO_ATLAS_INFO', 1)] language = f77