nimforum mirror - Linking neo to openblas.dll ?

Serge (orginal) [2020-07-27T20:02:00+02:00] view original

According to the doc of Neo for Nim on Github, the option.


--define:blas=openblas

makes it possible to use the open openblas lib instead of the blas dll.

I'm using Mingw 64, with:

Nim build from source (Github).

openblas installed:


https://packages.msys2.org/package/mingw-w64-x86_64-openblas
pacman -S mingw-w64-x86_64-openblas

but now I get :


 ./nim_neo_linear_algebra.exe
"could not load: openblas.dll"

and yet openblas is installed on my Mingw 64 system:


$ find /* -name "*blas*"
/mingw64/bin/libopenblas.dll
/mingw64/include/OpenBLAS/cblas.h
/mingw64/include/OpenBLAS/f77blas.h
/mingw64/include/OpenBLAS/openblas_config.h
/mingw64/lib/cmake/openblas
/mingw64/lib/libopenblas.a
/mingw64/lib/libopenblas.dll.a
/mingw64/lib/pkgconfig/openblas.pc

What could be missing?

Serge (orginal) [2020-07-27T20:30:13+02:00] view original

PS: I have also since tried (unsuccessfully):


nim c --clibdir:/mingw64/lib/libopenblas.dll.a --define:blas=openblas nim_neo_linear_algebra.nim

inventormatt (orginal) [2020-07-27T22:19:15+02:00] view original

have you tried -d:blas=libopenblas that works for me so it might work for you. if that doesn't work then make sure the you have folder with openblas in it set on your path.

mratsim (orginal) [2020-07-28T10:43:56+02:00] view original

BLAS on windows is a huge pain, and for Arraymancer as well.

By the way, I think on loading a DLL, Windows doesn't automatically prefix them with "lib" so you might need to --define:blas=openblas.

Serge (orginal) [2020-07-28T14:22:04+02:00] view original

It actually works!


nim c  -d:blas=libopenblas nim_neo_linear_algebra.nim

it compiles and runs and uses the openblas lib installed by "pacman" under Mingw64 on Widows.

That's really cool!

oyster (orginal) [2020-07-29T03:15:29+02:00] view original

-d:openblas -d:blas=libopenblas works for arraymancer too thanks

Mirror of forum.nim-lang.org

6605 :: Linking neo to openblas.dll ?