pub unsafe extern "C" fn LLVMRustConfigurePassManagerBuilder(
    PMB: &PassManagerBuilder,
    OptLevel: CodeGenOptLevel,
    MergeFunctions: bool,
    SLPVectorize: bool,
    LoopVectorize: bool,
    PrepareForThinLTO: bool,
    PGOGenPath: *const c_char,
    PGOUsePath: *const c_char,
    PGOSampleUsePath: *const c_char,
    SizeLevel: c_int
)