diff -r 6a8fbb97c8d8 setup.py
--- a/setup.py	Thu Nov 26 02:36:26 2015 +0000
+++ b/setup.py	Thu Nov 26 18:59:29 2015 +0800
@@ -568,10 +568,7 @@
                 if item.startswith('-L'):
                     lib_dirs.append(item[2:])
 
-        # Check for MacOS X, which doesn't need libm.a at all
-        math_libs = ['m']
-        if host_platform == 'darwin':
-            math_libs = []
+        math_libs = self.detect_math_libs()
 
         # XXX Omitted modules: gl, pure, dl, SGI-specific modules
 
@@ -675,7 +672,7 @@
         # Operations on audio samples
         # According to #993173, this one should actually work fine on
         # 64-bit platforms.
-        exts.append( Extension('audioop', ['audioop.c']) )
+        exts.append( Extension('audioop', ['audioop.c'], libraries=math_libs) )
 
         # readline
         do_readline = self.compiler.find_library_file(lib_dirs, 'readline')
@@ -1940,6 +1937,8 @@
         elif host_platform.startswith('hp-ux'):
             extra_link_args.append('-fPIC')
 
+        math_libs = self.detect_math_libs()
+
         ext = Extension('_ctypes',
                         include_dirs=include_dirs,
                         extra_compile_args=extra_compile_args,
@@ -1948,7 +1947,8 @@
                         sources=sources,
                         depends=depends)
         ext_test = Extension('_ctypes_test',
-                             sources=['_ctypes/_ctypes_test.c'])
+                             sources=['_ctypes/_ctypes_test.c'],
+                             libraries=math_libs)
         self.extensions.extend([ext, ext_test])
 
         if not '--with-system-ffi' in sysconfig.get_config_var("CONFIG_ARGS"):
@@ -2116,6 +2116,14 @@
         )
         return ext
 
+    def detect_math_libs(self):
+        # Check for MacOS X, which doesn't need libm.a at all
+        math_libs = ['m']
+        if host_platform == 'darwin':
+            math_libs = []
+        return math_libs
+
+
 class PyBuildInstall(install):
     # Suppress the warning about installation into the lib_dynload
     # directory, which is not in sys.path when running Python during