As of Xcode 4.2 Apple have stopped bundling GCC with it, shipping only the (mostly) compatible llvm-gcc binary instead. The suggested fix is to install GCC using the osx-gcc-installer project. However, I wanted to build and install it from source, which apple provides at http://opensource.apple.com/.
You should already have installed Xcode 4.2 from the app store, then basically the following steps are to grab the tarball from the 4.1 developer tools source, unpack & compile it, then install it into the right places.
Update 2016-07-03: I'd suggest just using homebrew to install this these days:
brew install homebrew/dupes/apple-gcc42
# Grab and unpack the tarball
mkdir ~/tmp && cd ~/tmp
curl -O http://opensource.apple.com/tarballs/gcc/gcc-5666.3.tar.gz
tar zxf gcc-5666.3.tar.gz
# Setup some stuff it requires
mkdir -p build/obj build/dst build/sym
# And then build it. You should go make a cup of tea or five whilst this runs.
gnumake install RC_OS=macos RC_ARCHS='i386 x86_64' TARGETS='i386 x86_64' \
SRCROOT=`pwd` OBJROOT=`pwd`/build/obj DSTROOT=`pwd`/build/dst \
# And finally install it
sudo ditto build/dst /
And now you should have
gcc-4.2 in your
$PATH, available to build all the things that
llvm-gcc fails to compile.
See the Update at the end before you get excited :(
Having just installed 10.6.6 to use the Mac App Store, I was slightly annoyed that it fills my dock with apps as I install them. I'm a bit strange, in that I use a hidden preference to make the dock uneditable (it stops me accidentally dragging an app off.) But that means I can't drag off the Mac App Store installed apps either.
Had a quick look through
/Applications/App Store.app/Contents/MacOS/App Store with
strings (love that tool) and noted a few strings that looked interesting. (There's a full list in this gist.) There wasn't anything that explicitly stated it stopped it putting anything in the dock, but I did notice an option that stopped it showing install progress in the dock.
Yank up a terminal window, bash out the following…
defaults write com.apple.appstore FRDebugShowInstallProgress -bool NO
…head back to the MAS and install another (free) app, and hey presto, it's leaving my dock alone! Hopefully that's all I needed to continue using my Dock as I like. (Hidden, and left alone.)
Seems my joy was short-lived. I'd re-downloaded an app I'd already purchased and it just showed download progress in the MAS app, not in the dock. Installing new applications still shows up in the dock (annoyingly.)
I've been having a poke through how it all hangs together, and if it's possible to actually block downloads from the Dock or not. It doesn't look like there's a hidden preference to hide new apps from downloading in the dock, you can just disable the progress bars in the dock with prefs. The MAS.app seems to be codenamed "Firenze", with the "hidden" prefs being prefixed with "FRDebug".
As I understand it, the App\ Store.app invokes a binary inside
/System/Library/PrivateFrameworks/CommerceKit.framework called "storeagent" to do the actual downloading/talking to the dock. From looking at the class-dump of storeagent it communicates with the dock to place a new type of DockTile. Interesting sounding methods to (potentially?) swizzle are
-[DownloadQueue sendDownloadListToDock] and
I've given up for now, but I reckon it should be possible to create a bundle that swizzles the right methods in storeagent to stop it placing the downloads on the Dock.