bpo-32647: Link ctypes extension with libdl. (python#5550)

tiran · web-flow · commit 5bb9692575f1 · 2018-02-25T10:22:14.000+01:00
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 &lt;christian@python.org&gt;
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
@@ -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
@@ -2005,6 +2005,10 @@ def detect_ctypes(self, inc_dirs, lib_dirs):
             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 _decimal_ext(self):
         extra_compile_args = []
         undef_macros = []

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+The ctypes module used to depend on indirect linking for dlopen. The shared`
	`2`	`+extension is now explicitly linked against libdl on platforms with dl.`