Hi, I started working on an easy installer for blas/lapack. The idea is that you would use this installer so that building numpy and scipy from source is easy on windows (32 bits for now). It would give blas/lapack compiled correctly, with optional atlas optimized version. http://www.ar.media.kyoto-u.ac.jp/members/david/archives/blas_lapack_superpa... How to use ========== Run the setup.exe, click yes all the way. Add the installed dll in your path, or add the path where the dll are installed in your PATH. main features: ============== - Click only, easy installation of blas and lapack libraries (including atlas if supported, see below). - Install atlas *only if your cpu supports it*: that's the main feature, actually. The installer detects your cpu, and install ATLAS only if an ATLAS matching your CPU is found (only SSE3 supported for now, but other arch, included 3dnow and co, can easily be added depending on people help to provide the built ATLAS). What can you do with it: ======================== - compile numpy and scipy without wrong SSE problem, without bothering about compiling netlib BLAS/LAPACK, etc... - compile numpy wo any fortran compiler, VS only (no need for mingw, etc... thanks to VS import libraries + DLL). - use the installed lapack to build an optimized ATLAS for your architecture (using both gnu compilers and proprietary compilers should be possible). More details ============ - built with mingw g77 from linux (dll, unix-style static archives and def) - import libraries built with VS 2003. This means you can compile numpy wo any fortran compiler, in particular, no need for mingw. I don't know if this is compatible with other versions of VS, though. - Only SSE3 and above will get ATLAS for now. This is because compiling ATLAS on windows is a PITA, and I don't want to spend time on this, so if you want something else, you will have to provide me the atlas binary first. But having atlas for sse, sse2, 3dnow, etc... is entirely possible. - I do not register the DLL yet, because I am not sure yet how to do it in a safe way (thanks MS for a totally broken handling of shared libraries, BTW) - I do not guarantee that the built atlas is optimal. ATLAS performances depend on many parameters, not just sse/sse2/sse3 (size of L1/L2/L3 cache are significant, for example), and again, I cannot build many different libraries. - The installer is built using nsis. - The whole process of making the installer is not 100 % automatic yet, but I intend to make it so, and put the necessary scripts somewhere so people can improve it if they want. This is alpha software, and because it is an installer, it can screw up your computer if I did something wrong. However, I barely touch the registry, and only install files in one directory, so the chances are pretty minimal (that's why also you have to put dll manually in a path where they will be found manually: at some point, this will be done by the installer, but that's by far the most dangerous thing, so I prefer avoiding it for now). cheers, David