bug#63986: Julia is very slow

[Efraim Flashner]

On Thu, Jun 22, 2023 at 08:47:48PM +0200, Simon Tournier wrote:
> Hi,
> 
> On Thu, 22 Jun 2023 at 19:25, Efraim Flashner <efraim@flashner.co.il> wrote:
> 
> > (ins)efraim@3900XT ~/workspace/guix$ cat 
> > /gnu/store/v6z5ykkjfzbc72x1x900xflspqc5wd5r-openblas-ilp64-0.3.20/lib/pkgconfig/openblas.pc
> > libdir=/gnu/store/v6z5ykkjfzbc72x1x900xflspqc5wd5r-openblas-ilp64-0.3.20/lib
> > includedir=/gnu/store/v6z5ykkjfzbc72x1x900xflspqc5wd5r-openblas-ilp64-0.3.20/include
> > openblas_config= USE_64BITINT= DYNAMIC_ARCH=1 DYNAMIC_OLDER=1 NO_CBLAS= 
> > NO_LAPACK= NO_LAPACKE= NO_AFFINITY=1 USE_OPENMP= generic MAX_THREADS=128
> > version=0.3.20
> > extralib=-lm -lpthread -lgfortran -lm -lpthread -lgfortran
> > Name: openblas
> > Description: OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 
> > BSD version
> > Version: ${version}
> > URL: https://github.com/xianyi/OpenBLAS
> > Libs: -L${libdir} -lopenblas
> > Libs.private: ${extralib}
> > Cflags: -I${includedir}
> >
> > Looks like it should be "LIBBLAS=-lopenblas"
> 
> I propose to tweak openblas-ilp64.  Currently it looks like:
> 
> --8<---------------cut here---------------start------------->8---
> $ tree $(guix build openblas-ilp64)/lib
> /gnu/store/v6z5ykkjfzbc72x1x900xflspqc5wd5r-openblas-ilp64-0.3.20/lib
> ├── cmake
> │   └── openblas
> │       ├── OpenBLASConfig.cmake
> │       └── OpenBLASConfigVersion.cmake
> ├── libopenblas_ilp64p-r0.3.20.so
> ├── libopenblas_ilp64.so -> libopenblas_ilp64p-r0.3.20.so
> ├── libopenblas_ilp64.so.0 -> libopenblas_ilp64p-r0.3.20.so
> └── pkgconfig
>     └── openblas.pc
> --8<---------------cut here---------------end--------------->8---
> 
> which is inconsistent with pkgconfig as you noticed above.  Therefore, I
> am proposing the addition of a symlink of libopenblas_ilp64p.so to
> libopenblas.so.  For instance this attached patch.

I've attached the patch that I've made it to. julia is built with
openblas-ilp64 on 64-bit architectures, openblas-ilp64 has its
configure-flags adjusted to match what other programs are expecting, and
I've also patched python-numpy to use openblas-ilp64 as another test
target.

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Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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julia-openblas-ilp64.patch
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