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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++?
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Apple ships the clang/LLVM compiler with macOS. Clang is a "front-end" that can parse C , C++ and Objective-C down to something that LLVM (referred to as a "back-end") can compile. Clang/LLVM is located in /Applications/Xcode. app/somewhere.
TL;DR: Clang is highly compatible to GCC - just give it a go. In most cases, Clang could be used as a GCC drop in replacement ( clang and clang++ are "GCC compatible drivers").
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.
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You'd have to install it from macports:
$ sudo port install gcc49 However I am not certain how you'd integrate gcc into Xcode 5, however you don't mention why you cannot use clang?
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