gistfile1.txt

→ brew install git
==> Downloading http://git-core.googlecode.com/files/git-1.7.11.tar.gz
Already downloaded: /Library/Caches/Homebrew/git-1.7.11.tar.gz
==> make prefix=/usr/local/Cellar/git/1.7.11 CC=/usr/bin/llvm-gcc CFLAGS=-Os -w -pipe -march=core2 -msse4 LDFLAGS= install
==> make CC=/usr/bin/llvm-gcc CFLAGS=-Os -w -pipe -march=core2 -msse4 LDFLAGS=
/usr/bin/llvm-gcc -c -Os -w -pipe -march=core2 -msse4 git-credential-osxkeychain.c
git-credential-osxkeychain.c:4:31: error: Security/Security.h: No such file or directory
git-credential-osxkeychain.c:6: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘protocol’
git-credential-osxkeychain.c:11: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘port’
git-credential-osxkeychain.c:50: error: expected ‘)’ before ‘item’
git-credential-osxkeychain.c: In function ‘find_internet_password’:
git-credential-osxkeychain.c:69: error: ‘UInt32’ undeclared (first use in this function)
git-credential-osxkeychain.c:69: error: (Each undeclared identifier is reported only once
git-credential-osxkeychain.c:69: error: for each function it appears in.)
git-credential-osxkeychain.c:69: error: expected ‘;’ before ‘len’
git-credential-osxkeychain.c:70: error: ‘SecKeychainItemRef’ undeclared (first use in this function)
git-credential-osxkeychain.c:70: error: expected ‘;’ before ‘item’
git-credential-osxkeychain.c:72: error: ‘port’ undeclared (first use in this function)
git-credential-osxkeychain.c:72: error: ‘protocol’ undeclared (first use in this function)
git-credential-osxkeychain.c:72: error: ‘kSecAuthenticationTypeDefault’ undeclared (first use in this function)
git-credential-osxkeychain.c:72: error: ‘len’ undeclared (first use in this function)
git-credential-osxkeychain.c:72: error: ‘item’ undeclared (first use in this function)
git-credential-osxkeychain.c: In function ‘delete_internet_password’:
git-credential-osxkeychain.c:84: error: ‘SecKeychainItemRef’ undeclared (first use in this function)
git-credential-osxkeychain.c:84: error: expected ‘;’ before ‘item’
git-credential-osxkeychain.c:91: error: ‘protocol’ undeclared (first use in this function)
git-credential-osxkeychain.c:94: error: ‘port’ undeclared (first use in this function)
git-credential-osxkeychain.c:94: error: ‘kSecAuthenticationTypeDefault’ undeclared (first use in this function)
git-credential-osxkeychain.c:94: error: ‘item’ undeclared (first use in this function)
git-credential-osxkeychain.c: In function ‘add_internet_password’:
git-credential-osxkeychain.c:103: error: ‘protocol’ undeclared (first use in this function)
git-credential-osxkeychain.c:107: error: ‘port’ undeclared (first use in this function)
git-credential-osxkeychain.c:107: error: ‘kSecAuthenticationTypeDefault’ undeclared (first use in this function)
git-credential-osxkeychain.c: In function ‘read_credential’:
git-credential-osxkeychain.c:131: error: ‘protocol’ undeclared (first use in this function)
git-credential-osxkeychain.c:131: error: ‘kSecProtocolTypeHTTPS’ undeclared (first use in this function)
git-credential-osxkeychain.c:133: error: ‘kSecProtocolTypeHTTP’ undeclared (first use in this function)
git-credential-osxkeychain.c:141: error: ‘port’ undeclared (first use in this function)
make: *** [git-credential-osxkeychain.o] Error 1
==> Build Environment
CPU: quad-core 64-bit sandybridge
MacOS: 10.7.3-x86_64
Xcode: 4.3.3
CC: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CXX: /usr/bin/llvm-g++ => /usr/llvm-gcc-4.2/bin/llvm-g++-4.2
LD: /usr/bin/llvm-gcc => /usr/llvm-gcc-4.2/bin/llvm-gcc-4.2
CFLAGS: -Os -w -pipe -march=core2 -msse4
CXXFLAGS: -Os -w -pipe -march=core2 -msse4
MAKEFLAGS: -j4
Error: Failed executing: make CC=/usr/bin/llvm-gcc CFLAGS=-Os\ -w\ -pipe\ -march=core2\ -msse4 LDFLAGS= (git.rb:57)
These existing issues may help you:
    https://github.com/mxcl/homebrew/issues/8643
    https://github.com/mxcl/homebrew/issues/9618
    https://github.com/mxcl/homebrew/issues/10544
    https://github.com/mxcl/homebrew/issues/11481
    https://github.com/mxcl/homebrew/issues/12344
    https://github.com/mxcl/homebrew/issues/12814
    https://github.com/mxcl/homebrew/issues/12897
Otherwise, please report the bug:
    https://github.com/mxcl/homebrew/wiki/reporting-bugs

Did you get to the bottom of this one? I'm experiencing the same issue.

Cheers,
Dave

I tried running:

brew doctor

Which told me to:

Error: Your compilers are different from the standard versions for your Xcode.
If you have Xcode 4.3 or newer, you should install the Command Line Tools for
Xcode from within Xcode's Download preferences.
Otherwise, you should reinstall Xcode.

Which worked!

Thanks. This fixed my "brew install git" error. The command line tools from the Apple's developer site fixed it.