Hi Martin, really nice work. Just one minor nit:
>--- a/gcc/doc/invoke.texi >+++ b/gcc/doc/invoke.texi >@@ -6568,8 +6568,13 @@ attributes. > @item -Wno-builtin-declaration-mismatch > @opindex Wno-builtin-declaration-mismatch > @opindex Wbuiltin-declaration-mismatch >-Warn if a built-in function is declared with the wrong signature or >-as non-function. >+Warn if a built-in function is declared with the wrong signature or >+as non-function. Also warn when a built-in function that takes arguments >+is declared without a prototype, and for calls to built-in functions >+declared ithout a prototype made with the wrong number of arguments or s/ithout/without/ Bernd.
