Since xcconfigs can include other configs you get the same functionality that Xcode's
build settings give you but with much more clarity. And it's much better for SCM,
especially decentralized ones like git.
Changes:
- Archs is set to ppc i386 x86_64
- libgit2 is now compiled including -arch x86_64.
- LTO is off (caused a Rel32 address space error when linking)
- Default compiler is now LLVM GCC4.2 since Clang is not quite ready for Objective C++.
(and we have some .mm files in there)
- Based on: settings on Xcode's build settings dialogs are set according to the name
of the xcconfig file. (project settings are based on Common.xcconfig)
- Deleted all the overwritten settings (bold font display) that are now defined through
the xcconfigs.
André Berg