CBC tries to use system's blas at runtime which creates an error

[sagetrac-tmonteil]

Here is the problem: if i build cbc on a machine where libopenblas-base is not installed, cbc works fine. Now, if i install libopenblas-base, i got:

from sage.numerical.backends.coin_backend import CoinBackend
ImportError: /usr/lib/libblas.so.3: undefined symbol: sgemv_thread_n

I do not understand why cbc tries to use system's blas at runtime while Sage already provides one.

Remark: if libopenblas-dev is installed when cbc is built, there is no problem, even if i remove libopenblas-base during runtime.

CC: @jdemeyer @mkoeppe

Component: packages: optional

Keywords: sdl

Issue created by migration from https://trac.sagemath.org/ticket/22006

[sagetrac-tmonteil]

Description changed:

--- 
+++ 
@@ -7,5 +7,5 @@
 
 I do not understand why cbc tries to use system's blas at runtime while Sage already provides one.
 
-Remark: if `libopenblas-base` is installed when `cbc` is built, there is no problem, even if i remove `libopenblas-base` during runtime.
+Remark: if `libopenblas-dev` is installed when `cbc` is built, there is no problem, even if i remove `libopenblas-base` during runtime.
 

[vbraun]

comment:4

optional packages aren't blockers

[mkoeppe]

Likely outdated