CMakelist cleanup, might buildfix things on Linux Clang

b.sh

@@ -39,6 +39,10 @@ do
 		--no-package) echo "Packaging disabled"
 			PACKAGE=0
 			;;
+                --clang) echo "Clang enabled"
+			export CC=/usr/bin/clang
+			export CXX=/usr/bin/clang++
+			;;
 		--*) echo "Bad option: $1"
 			exit 1
 			;;