On Sat, 5 Jan 2013, David Brown wrote:
I'm attempting to build the GCC 4.8-20121230 snapshot on Debian x86_64 with GCC 4.7.2. The problem first appeared on Debian Squeeze, but I've since switched to Debian Wheezy and the it still persists.
Please try a more recent snapshot, I think this was already fixed. Note that, unless you have a particular reason not to, installing the libmpc-dev package would be easier.
-- Marc Glisse