[New-bugs-announce] [issue11410] Use GCC visibility attrs in PyAPI_*

Thomas Wouters report at bugs.python.org
Sun Mar 6 07:12:25 CET 2011

New submission from Thomas Wouters <thomas at python.org>:

This patch adds support for the GCC visibility attributes to the PyAPI_* macros (currently only used for Windows.) GCC's default visibility is 'public', but can be changed to 'hidden' with the '-fvisibility=hidden' argument; see http://gcc.gnu.org/wiki/Visibility. This patch does not make the build use that, it merely makes Python function correctly when the default visibility *is* changed. (The benefit of building Python with -fvisibility=hidden is very small, as it causes only a handful of symbols to not be exported. When embedding Python, though, this can make a lot of difference.)

The patch also fixes a few modules that don't use PyMODINIT_FUNC for their module-init function definitions, like they should.

files: gcc-visibility.diff
keywords: needs review, patch
messages: 130143
nosy: twouters
priority: normal
severity: normal
status: open
title: Use GCC visibility attrs in PyAPI_*
Added file: http://bugs.python.org/file21014/gcc-visibility.diff

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