Fenics developer tool script fails on Broadwell architecture

Question

Hello,

I try to install Fenics from the developer script as:

wget -O - http://fenicsproject.org/fenics-install.sh | bash

however the compilation fails because the stable version of openblas cannot detect the Broadwell processor architecture:

[lapack] Building lapack/qze4d3ok7q47, follow log with:
[lapack]   tail -f /home/petr/.hashdist/tmp/lapack-qze4d3ok7q47-8/_hashdist/build.log
[lapack|ERROR] Command '[u'/bin/bash', '_hashdist/build.sh']' returned non-zero exit status 2
[lapack|ERROR] command failed (code=2); raising

The development version of openblas compiles correctly on Broadwell architecture.

How to correctly create local hashdist profile with dev version of openblas?

Thanks,

Petr

Answer 1

You do not necessarily need to use the dev version of OpenBLAS to do this. Instead you can specify the TARGET manually as explained several times on the fenics-support mailing list. What you need to do is to modify the HashDist profile like this:

blas:
  use: openblas
  extra_flags: TARGET=<target>

where <target> should match your CPU (see the list of available CPU targets).

However, if you do want to use the dev version of OpenBLAS, then you can first run

hit fetchgit -p openblas https://github.com/xianyi/OpenBLAS.git master

and then use the output from that command in your HashDist profile, like this:

blas:
  use: openblas
  sources:
  - key: git:85636ff1a015d04d3a8f960bc644b85ee5157135
    url: https://github.com/xianyi/OpenBLAS.git

BTW, installation related questions like this are better to be directed at the fenics-support mailing list.

Comments

Ok, thank you for the answer. It is very helpful.

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Good, you are welcome. Please select the answer if it solved your problem.