Get Mountain Lion and Homebrew to Be Happy
1) Install XCode 4.4 into /Applications
Get it from the App Store.
2) Install Command Line Tools
In XCode's Preferences > Downloads you can install command line tools.
3) Let Everyone Know Where XCode Is
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
4) Install X11
Visit http://xquartz.macosforge.org/trac/wiki and download and install 2.7.2+.
You will need to fix the symlink it makes:
ln -s /opt/X11 /usr/X11
5) Reinstall your brews
Will tell you what you need to check. Try out everything one by one and when one doesn't work
brew remove it and then reinstall it. If the install doesn't work, try
brew install it --use-gcc to prevent llvm from getting in the way.
Things that gave me issues that I had to remove and install:
You might need to install libxml2 and link it manually to make sure you don't get the wrong xml2-config if your path:
brew install libxml2 brew link libxml2
brew doctor and fix anything it tells you.
You may also need to symlink gcc for certain ruby gems and other stuff like that:
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
Maybe even g++ if you use that:
sudo ln -s /usr/bin/g++ /usr/bin/g++-4.2
You are good to go.
I've been trying to help a friend with this. It seems to be some kind of account issue on Apple's side.
I can confirm what @uipoet said, the command line tools download is now located under the XCode 4.4 listing on https://developer.apple.com/downloads .
I can login in to the developer downloads and see it there, and XCode also properly downloads it from the Preferences Pane. For my friend, he can't see it in the apple developer download list, nor can he download it in XCode. Odd indeed.
UPDATE - He just tried again and it works.