I just noticed that after installing OS X 10.9, the g++ compiler links to the clang compiler. Is there anyway to revert back to gcc/g++?
It has been this way for a long time already. The "GCC" that came with 10.8 was really GCC front-end with LLVM back-end.
The best way to get GCC is via Homebrew. After the one-line homebrew install command on the bottom of the linked page, you just need:
$ brew install gcc49
Unlike macports, Homebrew doesn't clutter your system dirs and it's much better at managing versions and uninstalls. It also doesn't require the crutch known as sudo
.