Build and install Brew apps that are x86_64 instead of i386?

Question

After I have done this:

brew install git

I do this:

which git

which returns:

<

Answer 1

Try with

xcode-select --install

Answer 2

This has been solved.

I installed Xcode 4.3.2 via the App Store and installed the Command Line Tools, but I had an existing Xcode 3.1 installed from years ago. I Googled around and found these commands:

sudo /Developer/Library/uninstall-devtools –mode=all

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

That cured my problem and after I did that the compilers changed for brew:

$ brew --env
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
MAKEFLAGS: -j4

brew installs are much better now:

$ which git
/usr/local/bin/git

$ file /usr/local/bin/git
/usr/local/bin/git: Mach-O 64-bit executable x86_64