Hi guys, I have been trying to compile numpy 1.6.2 with the ACML4.4.0 on our AMD based cluster. I mainly followed some guides but most likely outdated like this one: http://projects.scipy.org/numpy/attachment/ticket/740/acml2.log I have compiled CBLAS linked with ACML4.4.0 gfortran, and it appears to be working fine (I ran the supplied built tests). Then when I compiled numpy 1.6.2, it refused to pick up the CBLAS and ACML no matter how. It always uses the ATLAS which is installed via OS package by default. That legacy guide as well as some very old posts suggested that all magics happen in site.cfg, which is what I did: [blas_opt] libraries = cblas, acml library_dirs = /share/ClusterShare/software/centos6/CBLAS/lib/ACML440:/share/ClusterShare/software/noarch/acml4.4.0/gfortran64/lib include_dirs = /share/ClusterShare/software/centos6/CBLAS/include:/share/ClusterShare/software/noarch/acml4.4.0/gfortran64/include [lapack_opt] libraries = acml library_dirs = /share/ClusterShare/software/noarch/acml4.4.0/gfortran64/lib include_dirs = /share/ClusterShare/software/noarch/acml4.4.0/gfortran64/include Later I read the official installation guide http://www.scipy.org/Installing_SciPy/Linux, saying we can export BLAS, LAPACK to the specified libraries. I tried but didn't work either. Anyone has done the similar thing successfully? Thanks in adv. Derrick