diff -r 6a2f74811240 setup.py
--- a/setup.py	Thu Oct 23 23:03:35 2014 +0200
+++ b/setup.py	Mon Oct 27 10:44:42 2014 -0500
@@ -673,7 +675,8 @@
         # 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')
@@ -1946,7 +1949,8 @@
                         sources=sources,
                         depends=depends)
         ext_test = Extension('_ctypes_test',
-                             sources=['_ctypes/_ctypes_test.c'])
+                             sources=['_ctypes/_ctypes_test.c'],
+                             libraries=['m'])
         self.extensions.extend([ext, ext_test])
 
         if not '--with-system-ffi' in sysconfig.get_config_var("CONFIG_ARGS"):