alternatively, have a build of a more recent GCC locally (i have gcc 4.8 installed ) 

alternatively, manuel, Luke i, and darin hacked out a way to wrap clang so 7.6 could use clang as if it were gcc. the current version lives over https://github.com/ghc-ios/ghc-ios-scripts/blob/master/clang-xcode5-wrapper.hs , as linked from the ghcIOS directions here http://ghc.haskell.org/trac/ghc/wiki/Building/CrossCompiling/iOS

the simplest way might be the last in terms of extra deps to install. 

alternatively you can do something like brew install gcc48 or brew install apple-gcc42  (i've got 4.8 installed)

cheers