Trying to Build Glibc 2.11.2 with Fedora 18

So I follow directions to unpack glibc-2.11.2.tar.gz and create an adjacent "build" directory and do the usual "sh ../glibc-2.11.2/configure --prefix=... && make" and I keep getting the same error during the build:

/tmp/cc34HA5c.s: Assembler messages:
/tmp/cc34HA5c.s: Error: open CFI at the end of file; missing .cfi_endproc directive

I also ran into this on an Ubuntu 12.04 distribution upon which I attempted to build so I have no idea why it's giving me problems or what in the hell this error message means.

Any ideas?

(Don't worry about *why* I'm building this specific version of Glibc unless it's really a problem with the version itself and not something I have misconfigured.)