diff -r 9213c70c67d2 setup.py
--- a/setup.py	Tue May 26 01:35:54 2015 -0700
+++ b/setup.py	Wed May 27 12:34:56 2015 +0200
@@ -499,18 +499,15 @@
         # lib_dirs and inc_dirs are used to search for files;
         # if a file is found in one of those directories, it can
         # be assumed that no additional -I,-L directives are needed.
-        inc_dirs = self.compiler.include_dirs[:]
-        lib_dirs = self.compiler.library_dirs[:]
         if not cross_compiling:
-            for d in (
-                '/usr/include',
-                ):
-                add_dir_to_list(inc_dirs, d)
-            for d in (
+            lib_dirs = self.compiler.library_dirs + [
                 '/lib64', '/usr/lib64',
                 '/lib', '/usr/lib',
-                ):
-                add_dir_to_list(lib_dirs, d)
+                ]
+            inc_dirs = self.compiler.include_dirs + ['/usr/include']
+        else:
+            lib_dirs = self.compiler.library_dirs[:]
+            inc_dirs = self.compiler.include_dirs[:]
         exts = []
         missing = []