Hi,

We've been having a discussion over on the Numpy mailing list about what library to use for Windows 64 blas and lapack [1]. One option would obviously be Eigen.

I've been trying to compile blas and lapack Eigen in various ways using 64-bit Mingw compilers, but I have not got very far:

http://eigen.tuxfamily.org/bz/show_bug.cgi?id=775
http://eigen.tuxfamily.org/bz/show_bug.cgi?id=776

Can anyone share a recipe to compile Eigen blas and lapack on Windows with Mingw64?

Thanks a lot,

Matthew

[1] http://mail.scipy.org/pipermail/numpy-d ... 69707.html

You're probably the first one trying to compile our blas interface with mingw.

With the fixes from the two bug reports I listed, I can build Eigen blas and lapack with the current mingw64 gcc 4.8.2 - thank you.

I was trying to link the output libraries with numpy, but I believe numpy needs the cblas C wrappers, because I am getting errors like "undefined reference to `cblas_z
dotc_sub'". Do you have any plans to add cblas wrappers?

Thanks a lot.

You're not the first one asking for a cblas interface so this might happen. Actually, I'm surprised that no generic cblas->blas wrapper exist yet, or at least I did not managed to find one.

The code available at http://www.netlib.org/blas/blast-forum/cblas.tgz provides a CBLAS interface on top of any compliant BLAS library. It works well with the Eigen BLAS apis.

Benoit - have you built an Eigen blas library with cblas ? Can you share a recipe?

Thanks a lot.