Index: tools/cfa.nanorc
===================================================================
--- tools/cfa.nanorc	(revision 58daf53c2f84c02dc8637d972768b27ee907752c)
+++ tools/cfa.nanorc	(revision 974bcdd1e44b799a117b17dd76d4b1c7f87d4da7)
@@ -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