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OpenMathLib / OpenBLAS

OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.
http://www.openblas.net
BSD 3-Clause "New" or "Revised" License
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Can not link test_cblas_dgemm.c #3174

Closed ChrisNabold closed 3 years ago

ChrisNabold commented 3 years ago

I have compiled oipenblas using Mingw-64 -> which created the following directories C:/openblas/include, C:/openblas/lib and c:/openblas/share I also compiled Lapack without Build_shared_libs but with Lapacke -> which creted several directories in c:/Lapack/Build c:/Lapack/build/include and c:/lapack/build/lib with liblapack.a liblapacke.a I have a file c:/temp/test_cblas_dgemm.c but when I try to link it I alwas get the error undefined reference to cblas_dgemm Something with my gcc -command Any help is appreciated Thank you

martin-frbg commented 3 years ago

So what command are you using for linking ? Presumably you would need to specify the C:\openblas\lib path to the compiler so that the libopenblas can be found (-Lc:/openblas/lib -lopenblas). (And by the way your build of OpenBLAS will also contain Lapack and Lapacke by default if you have a fortran compiler installed, so there should be no need to build it separately)

ChrisNabold commented 3 years ago

Dear Martin,

Thank you for your help. I did not realize that openblas contaoins lapack.

I tried it and it worked!

Thank you

Best regards

Chris

From: Martin Kroeker @.> Sent: Tuesday, 6 April 2021 17:18 To: xianyi/OpenBLAS @.> Cc: ChrisNabold @.>; Author @.> Subject: Re: [xianyi/OpenBLAS] Can not link test_cblas_dgemm.c (#3174)

So what command are you using for linking ? Presumably you would need to specify the C:\openblas\lib path to the compiler so that the libopenblas can be found (-Lc:/openblas/lib -lopenblas). (And by the way your build of OpenBLAS will also contain Lapack and Lapacke by default if you have a fortran compiler installed, so there should be no need to build it separately)

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