scons: Use a cache for built files.

Like ccache, but works on all OSes.

diff --git a/scons/gallium.py b/scons/gallium.py
index 65dd0ab..4825e40 100644 (file)
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -207,6 +207,7 @@ def generate(env):
     # different scons versions building the same source file
     env['build'] = build_dir
     env.SConsignFile(os.path.join(build_dir, '.sconsign'))
+    env.CacheDir('build/cache')
 
     # C preprocessor options
     cppdefines = []