I'm catching a hang under Debian's ARM64 (AARCH64) in a QEMU Chroot. The environment does not have a working debugger, so I have it roughly isolated to two conditions. I need to test -fno-devirtualize on a particular class (H and CPP files), and I want to ensure it does not cross pollinate out of the class. (Say, by, including the header in other header files). How do I apply -fno-devirtualize to just the class when it needs to be applied to a particular class's header file (and that header file is included elsewhere) ? Thanks in advance.