kernel build generates invalid object files on Ubuntu 13.10

I've just updated a linux source tree to the latest version (probably from Linus's public tree) and then tried to compile it (for x86_64) using gcc 4.7.3 and binutils 2.32.2 on a system running Ubuntu 13.10. While not the newest gcc, it isn't that old. The linker is reporting that some of the

kernel build generates invalid object files on Ubuntu 13.10

I've just updated a linux source tree to the latest version (probably from Linus's public tree) and then tried to compile it (for x86_64) using gcc 4.7.3 and binutils 2.32.2 on a system running Ubuntu 13.10. While not the newest gcc, it isn't that old. The linker is reporting that some of the