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[2.7] bpo-32647: Link ctypes extension with libdl. (GH-5550) (#5877) 

The ctypes module used to depend on indirect linking for dlopen. The shared
extension is now explicitly linked against libdl on platforms with dl.

Signed-off-by: Christian Heimes <christian@python.org>.
(cherry picked from commit 5bb9692575)

Co-authored-by: Christian Heimes <christian@python.org>
This commit is contained in:
Christian Heimes 2018-02-25 12:31:17 +01:00 committed by GitHub
parent 3d87f4cf9c
commit 4bb9b9aea0
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Misc/NEWS.d/next/Library/2018-02-05-13-31-42.bpo-32647.ktmfR_.rst Normal file
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@ -0,0 +1,2 @@
The ctypes module used to depend on indirect linking for dlopen. The shared
extension is now explicitly linked against libdl on platforms with dl.

4
setup.py
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@ -2149,6 +2149,10 @@ class PyBuildExt(build_ext):
ext.libraries.append(ffi_lib)
self.use_system_libffi = True
if sysconfig.get_config_var('HAVE_LIBDL'):
# for dlopen, see bpo-32647
ext.libraries.append('dl')
def _detect_nis(self, inc_dirs, lib_dirs):
if host_platform in {'win32', 'cygwin', 'qnx6'}:
return None