scons: Autogenerate GLSL builtin library *_gc.h from *.gc files.
diff --git a/src/mesa/SConscript b/src/mesa/SConscript
index dde9bb0..d5a9031 100644
--- a/src/mesa/SConscript
+++ b/src/mesa/SConscript
@@ -335,7 +335,9 @@
 		# Add the dir containing the generated header (somewhere inside  the
 		# build dir) to the include path  
 		env.Append(CPPPATH = [matypes[0].dir])
-	
+
+	SConscript('shader/slang/library/SConscript')
+
 	#
 	# Libraries
 	#