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
)