Add instructions about MSS library for GNU/Linux users

BoboTiG · BoboTiG · commit 1395c2655d47 · 2015-05-02T10:40:09.000+02:00
diff --git a/README.rst b/README.rst
@@ -19,6 +19,12 @@ You can install it with pip::
 
 Or you may just drop it in your project and forget about it.
 
+**For GNU/Linux users concerned by speed**, you will certainly need the MSS library. It is built when using `pip` but if you want to do it manually::
+
+    gcc -shared -rdynamic -fPIC -s -O3 -lX11 -o libmss.so dep/linux/mss.c
+
+That's it! Ship the libmms.so file along with mss.py and you are ready to take screenshots at the light speed!
+
 Support
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