glut: Include X11 headers and libraries in SCons build.

Fixes Mac OS X SCons build.

diff --git a/src/glut/glx/SConscript b/src/glut/glx/SConscript
index 9363b5ca5ccbc5c6e84791e00f6903121c954d1e..29d2cc01494841b0dd68909febe3aa626be01134 100644 (file)
--- a/src/glut/glx/SConscript
+++ b/src/glut/glx/SConscript
@@ -78,6 +78,7 @@ if env['platform'] == 'windows':
         'glut.def',
     ]
 else:
+    env.Tool('x11')
     env.PrependUnique(LIBS = [
         'GLU',
         'GL',