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  • Hash : aa5ea47f
    Author : Edward Thomson
    Date : 2017-02-22T10:34:19

    Provide error on gcc < 4.1 when THREADSAFE
    
    Provide a descriptive error message when compiling THREADSAFE on gcc
    versions < 4.1.  We require the atomic primitives (eg
    `__sync_synchronize`) that were introduced in that version.
    
    (Note, clang setes `__GNUC__` but appears to set its version > 4.1.)