Redirecting debug output from XCode 4 console to a log file

defaults write com.apple.Xcode PBXGDBDebuggerLogToFile YES
defaults write com.apple.Xcode PBXGDBDebuggerLogFileName <filepath>

/Developer/Platforms/iPhoneOS.platform/Developer/usr/libexec/gdb/gdb-arm-apple-darwin

#!/bin/sh

/Developer/Platforms/iPhoneOS.platform/Developer/usr/libexec/gdb/gdb-arm-apple-darwin- $* | tee -a $HOME/tmp/xcode-gdb.log 2>&1