Just to be sure, initialize with a copy of the compiler's lib and inc dirs.

tiran · tiran · commit d783261e99eb · 2012-12-12T12:56:51.000+01:00
diff --git a/setup.py b/setup.py
@@ -507,8 +507,8 @@ def detect_modules(self):
                 ]
             inc_dirs = self.compiler.include_dirs + ['/usr/include']
         else:
-            lib_dirs = []
-            inc_dirs = []
+            lib_dirs = self.compiler.library_dirs[:]
+            inc_dirs = self.compiler.include_dirs[:]
         exts = []
         missing = []
 
