Index: tools/cfa.nanorc
===================================================================
--- tools/cfa.nanorc	(revision 58daf53c2f84c02dc8637d972768b27ee907752c)
+++ tools/cfa.nanorc	(revision bf70aa95b89eb2a7499a5dca8acfa765fa5c2867)
@@ -33,5 +33,6 @@
 ## Update/Redistribute
 # GCC builtins
-##color cyan "__attribute__[[:space:]]*\(\([^)]*\)\)" "__(aligned|asm|builtin|hidden|inline|packed|restrict|section|typeof|weak)__"
+color cyan "__attribute__[[:space:]]*\(\([^()]*(\([^()]*\)[^()]*)*\)\)"
+##color cyan "__(aligned|asm|builtin|hidden|inline|packed|restrict|section|typeof|weak)__"
 
 # Preprocesser Directives