[issue4931] distutils does not show any error msg when can't build C module extensions due to a missing C compiler

[Roundup Robot]

Roundup Robot added the comment:

New changeset 0f1237b61f58 by Éric Araujo in branch '2.7':
Restore missing part of error message (#4931)
http://hg.python.org/cpython/rev/0f1237b61f58

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<http://bugs.python.org/issue4931>
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