问题
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++?
回答1:
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.
回答2:
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?
回答3:
Accessible and up to date GCC packages are at http://hpc.sourceforge.net/
回答4:
you can also get a g++ compiler from http://hpc.sourceforge.net/. They have the compiler in a pre-built package. Just download and follow their directions. Note you may need to change your executable PATH and have /usr/local/bin ahead of /usr/bin. This is to insure g++ calls the right compiler.
回答5:
This is by design, and not new in OS X 10.9. Apple deprecated GCC a long time ago. Just use Clang, or if you need fortran/openmp/..., install GCC yourself through homebrew/macports/...
来源：https://stackoverflow.com/questions/19535422/os-x-10-9-gcc-links-to-clang