clang warnings

Hi, To test the coming GHC 7.8.3, I started to use the latest ghc-7.8 branch. Unfortunately, on my Mac, I saw many warnings which are not displayed with GHC 7.8.2: clang: warning: argument unused during compilation: '-fno-stack-protector' clang: warning: argument unused during compilation: '-D TABLES_NEXT_TO_CODE' clang: warning: argument unused during compilation: '-I test' clang: warning: argument unused during compilation: '-I dist/build/spec/spec-tmp' clang: warning: argument unused during compilation: '-I dist/build/spec/spec-tmp' clang: warning: argument unused during compilation: '-I dist/build/autogen' clang: warning: argument unused during compilation: '-I dist/build/spec/spec-tmp' Is this a known issue? --Kazu