[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 5bb9692575f10f4a7c7f1c2c0c70956baf6d5c23)
Co-authored-by: Christian Heimes <christian@python.org>
diff --git a/Misc/NEWS.d/next/Library/2018-02-05-13-31-42.bpo-32647.ktmfR_.rst b/Misc/NEWS.d/next/Library/2018-02-05-13-31-42.bpo-32647.ktmfR_.rst
new file mode 100644
index 0000000..04fc024
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-02-05-13-31-42.bpo-32647.ktmfR_.rst
@@ -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.
diff --git a/setup.py b/setup.py
index c1366c8..33cecc6 100644
--- a/setup.py
+++ b/setup.py
@@ -2149,6 +2149,10 @@
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