[issue20767] Some python extensions can't be compiled with clang 3.4

[Kubilay Kocak]

Kubilay Kocak <koobs.freebsd at gmail.com> added the comment:

The changeset(s) applied in this issue were/are fine (thus no response on the issue)

It is the *removal* of the changesets included in this issue (as proposed in https://github.com/python/cpython/pull/5233) that would re-break compilation of extensions with clang (requiring re-opening this issue)

The root cause of the current confusion is the special case added here was conditional on the OS ('freebsd'), whereas it should (arguably) have been for a specific compiler (clang). 

In order to do this, this leads to the compiler detection code requiring improvement, see: https://github.com/python/cpython/pull/5233#issuecomment-358906977 as it currently does not detect clang as the default compiler (cc), see: https://github.com/python/cpython/pull/5233#issuecomment-358948425

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<https://bugs.python.org/issue20767>
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