--- a/numpy/distutils/command/autodist.py
+++ b/numpy/distutils/command/autodist.py
@@ -49,7 +49,7 @@
     """Return True if the C compiler is GCC 4.x."""
     cmd._check_compiler()
     body = """
-int
+void
 main()
 {
 #if (! defined __GNUC__) || (__GNUC__ < 4)

--- a/numpy/distutils/command/install.py
+++ b/numpy/distutils/command/install.py
@@ -69,7 +69,7 @@
             need_rewrite = False
             for l in f:
                 l = l.rstrip()
-                if ' ' in l:
+                if ' ' in l and '%dir ' not in l:
                     need_rewrite = True
                     l = '"%s"' % (l)
                 lines.append(l)