llvm_gcda_emit_arcs

If you don't need the code coverage, you can complete disable it by using the following settings, thus avoiding the attempted calls to those functions.

GCC_INSTRUMENT_PROGRAM_FLOW_ARCS = NO

GCC_GENERATE_TEST_COVERAGE_FILES = NO

http://stackoverflow.com/questions/7949781/undefined-symbols-for-architecture-i386-upgrading-project-to-ios-5

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