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FIX check symbols to better identify supported libraries #151

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merged 2 commits into from Oct 10, 2023

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jeremiedbb
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Fixes #149

This PR proposes to check that at least 1 of the symbols we're looking for exists the make sure that a library having a matching prefix is actually a supported library (and not a library with a common prefix).

We can't really check that all symbols exist because:

  • libs can come with a different set of symbols (e.g. OpenBLAS built for 64bit)
  • libs may not expose all the symbols depending of their version, in which case we only show the info we're able to gather.

I'm not sure it's worth trying to install a library the used to trigger the bug in our CI just to test that. I did not find an easy way to install bliss for instance (at least, the way I found didn't come with a libbliss dso)...

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@ogrisel ogrisel left a comment

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Besides the following question, LGTM!

return "openmp"
elif self.dynlib.bli_info_get_enable_pthreads():
elif getattr(self.dynlib, "bli_info_get_enable_pthreads", lambda: False)():
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Why False instead of None?

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because I want to return a bool since it's passed to elif

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Indeed, I misread the line.

@ogrisel ogrisel merged commit 85d329a into joblib:master Oct 10, 2023
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netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Feb 14, 2024
3.3.0 (2024-02-14)
==================

- Extended FlexiBLAS support to be able to switch backend at runtime.
  joblib/threadpoolctl#163

- Added support for FlexiBLAS
  joblib/threadpoolctl#156

- Fixed a bug where an unsupported library would be detected because it shares a common
  prefix with one of the supported libraries. Now the symbols are also checked to
  identify the supported libraries.
  joblib/threadpoolctl#151
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Successfully merging this pull request may close these issues.

Incompatibility with unrelated C libraries whose names begin with certain prefixes (e.g. "libbliss.so")
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