On Sat, 6 Sep 2025, Martin Uecker wrote: > > This is the revised version adding the test to C_DECL_REGISTER. > This meant I also had to change one place where it is set on > function declarators before it becomes an error. > > Bootstrapped and regression tested on x86_64. > > Martin > > > c: Warn when returning nested functions that require a non-local context. > > This patch adds a mechanism to keep track whether nested functions require > non-local context because they reference a variable of an enclosing > scope. This is used for extending the existing -Wreturn-address warning > to also warn for such nested functions. Certain exceptions are > implemented > for functions that do not requite a non-local context, because they > reference > only static variables, named constants, non-local variables in unevaluated > sizeof, typeof or countof operators, or typedef. The logic is based on > the > existing infrastructure for determining use of undeclared static > functions. > Finally, To make sure that no trampolines are generated even when not > using > optimization, we mark the exempt functions with TREE_NO_TRAMPOLINE.
OK. -- Joseph S. Myers josmy...@redhat.com
