--- linux-4.18/scripts/clang-version.sh~	2018-08-12 22:41:04.000000000 +0200
+++ linux-4.18/scripts/clang-version.sh	2018-08-12 23:52:07.650403870 +0200
@@ -12,7 +12,7 @@
 
 compiler="$*"
 
-if !( $compiler --version | grep -q clang) ; then
+if ! ( $compiler --version | grep -q clang) ; then
 	echo 0
 	exit 1
 fi