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: /usr/local/bin/git I then do this: file /usr/local/bin/git which returns: /usr/local/bin/git: Mach-O executable i386 I need brew to install as x86_64. How can I force brew to build and install my apps as x86_64? brew --config Returns this: ``` HOMEBREW_VERSION: 0.9 HEAD: 1c64a6624ed83ef17af6e98638b8165400e9e908 HOMEBREW_PREFIX: /usr/local HOMEBREW_CELLAR: /usr/local/Cellar CPU: quad-core 64-bit sandybridge OS X: 10.7.4 Kernel Architecture: x86_64 Xcode: 4.3.2 GCC-4.0: N/A GCC-4.2: N/A LLVM: build 2336 Clang: 3.1 build 318 MacPorts or Fink? false X11: /usr/X11 System Ruby: 1.8.7-357 Which Perl: /usr/bin/perl Which Python: /usr/bin/python Which Ruby: /Users/tdewell/.rvm/rubies/ruby-1.9.3-p194/bin/ruby ``` Update: adding brew --env ``` $ brew --env CC: /usr/bin/xcrun gcc-4.2 => /Developer/usr/bin/gcc-4.2 CXX: /usr/bin/xcrun g++-4.2 => /Developer/usr/bin/g++-4.2 LD: /usr/bin/xcrun gcc-4.2 => /Developer/usr/bin/gc…

Accepted Answer

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
```

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

Solution

Problem