• p.shkadzko (40/40) Jan 11 2020 I am trying to run example code from
• dnsmt (7/11) Jan 12 2020 The Lubeck library depends on CBLAS, but the openblas package in
• p.shkadzko (4/17) Jan 13 2020 yeah, so I thought too but I have CBLAS installed as a distro
• Pavel Shkadzko (6/25) Mar 10 2020 Figured it out by using mir-blas and linking it with openBlas on

p.shkadzko <p.shkadzko gmail.com> writes:

I am trying to run example code from 
https://tour.dlang.org/tour/en/dub/lubeck

example.d:
---
/+dub.sdl:
dependency "lubeck" version="~>1.1"
+/
import lubeck: mtimes;
import mir.algorithm.iteration: each;
import mir.ndslice;
import std.stdio: writeln;

void main()
{
     auto n = 5;
     // Magic Square
     auto matrix = n.magic.as!double.slice;
     // [1 1 1 1 1]
     auto vec = 1.repeat(n).as!double.slice;
     // Uses CBLAS for multiplication
     matrix.mtimes(vec).writeln;
     "-----".writeln;
     matrix.mtimes(matrix).byDim!0.each!writeln;
}
---

I try to compile it via:

---
dub build --compiler="ldc" --single example.d -v
---

And get the error below:

---
Linking...
ldc 
-of.dub/build/application-debug-linux.posix-x86_64-ldc_2088-588551E77C1C779CBF3BECA
8D19211B/matrix_dot .dub/build/application-debug-linux.posix-x86_64-ldc_2088-588551E77C1C779CBF3BECA58
19211B/matrix_dot.o ../../../../../.dub/packages/lubeck-1.1.7/lubeck/.dub/build/library-debug-linux.posix-x86_64-ldc_2088-09723F6E7A90ABDEB9EDD35B
DC7E7CE/liblubeck.a ../../../../../.dub/packages/mir-lapack-1.2.1/mir-lapack/.dub/build/library-debug-linux.posix-x86_64-ldc_2088-69D3CA650230A9C73F912A6D1AB4
EE1/libmir-lapack.a ../../../../../.dub/packages/mir-blas-1.1.9/mir-blas/.dub/build/library-debug-linux.posix-x86_64-ldc_2088-9B27CD5D2C27A78F627CDC352C
76E52/libmir-blas.a ../../../../../.dub/packages/mir-algorithm-3.7.13/mir-algorithm/.dub/build/default-debug-linux.posix-x86_64-ldc_2088-255337055B86988DA608A6F2BE06058
/libmir-algorithm.a ../../../../../.dub/packages/mir-core-1.0.2/mir-core/.dub/build/library-debug-linux.posix-x86_64-ldc_2088-554F8271B5559801959D678513
A5389/libmir-core.a -L--no-as-needed -L-lopenblas -g
/home/tastyminerals/dev/github/mir_quickstart/source/benchmarks/../../../../../.dub/packages/mir-blas-1.1.9/mir-blas/so
rce/mir/blas.d:305: error: undefined reference to 'cblas_dgemv'
/home/tastyminerals/dev/github/mir_quickstart/source/benchmarks/../../../../../.dub/packages/mir-blas-1.1.9/mir-blas/so
rce/mir/blas.d:210: error: undefined reference to 'cblas_dger'
/home/tastyminerals/dev/github/mir_quickstart/source/benchmarks/../../../../../.dub/packages/mir-blas-1.1.9/mir-blas/so
rce/mir/blas.d:385: error: undefined reference to 'cblas_dgemm'
collect2: error: ld returned 1 exit status
Error: /usr/bin/gcc failed with status: 1
---

This is Linux Manjaro with openblas package installed.

dnsmt <null dnsmt.nl> writes:

On Saturday, 11 January 2020 at 16:45:22 UTC, p.shkadzko wrote:
 I am trying to run example code from 
 https://tour.dlang.org/tour/en/dub/lubeck

 ...

 This is Linux Manjaro with openblas package installed.

The Lubeck library depends on CBLAS, but the openblas package in 
the Arch repository is compiled without CBLAS. You can see that 
here (note the NO_CBLAS=1 parameter): 
https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/openblas

Try installing the cblas package: 
https://www.archlinux.org/packages/extra/x86_64/cblas/

p.shkadzko <p.shkadzko gmail.com> writes:

On Sunday, 12 January 2020 at 13:07:33 UTC, dnsmt wrote:
 On Saturday, 11 January 2020 at 16:45:22 UTC, p.shkadzko wrote:
 I am trying to run example code from 
 https://tour.dlang.org/tour/en/dub/lubeck

 ...

 This is Linux Manjaro with openblas package installed.

 The Lubeck library depends on CBLAS, but the openblas package 
 in the Arch repository is compiled without CBLAS. You can see 
 that here (note the NO_CBLAS=1 parameter): 
 https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/openblas

 Try installing the cblas package: 
 https://www.archlinux.org/packages/extra/x86_64/cblas/

yeah, so I thought too but I have CBLAS installed as a distro 
package. I also have OpenBLAS installed instead of BLAS because 
BLAS was removed since it conflicts with OpenBLAS ¯\_(ツ)_/¯

Pavel Shkadzko <p.shkadzko gmail.com> writes:

On Monday, 13 January 2020 at 20:47:07 UTC, p.shkadzko wrote:
 On Sunday, 12 January 2020 at 13:07:33 UTC, dnsmt wrote:
 On Saturday, 11 January 2020 at 16:45:22 UTC, p.shkadzko wrote:
 I am trying to run example code from 
 https://tour.dlang.org/tour/en/dub/lubeck

 ...

 This is Linux Manjaro with openblas package installed.

 The Lubeck library depends on CBLAS, but the openblas package 
 in the Arch repository is compiled without CBLAS. You can see 
 that here (note the NO_CBLAS=1 parameter): 
 https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/openblas

 Try installing the cblas package: 
 https://www.archlinux.org/packages/extra/x86_64/cblas/

 yeah, so I thought too but I have CBLAS installed as a distro 
 package. I also have OpenBLAS installed instead of BLAS because 
 BLAS was removed since it conflicts with OpenBLAS ¯\_(ツ)_/¯

Figured it out by using mir-blas and linking it with openBlas on 
Linux.
You'll need openBlas and cblas installed.
dub.json needs "subConfigurations": {"mir-blas": "twolib"}
Then you can import blas functions like so import mir.blas : gemm;