pub unsafe extern "C" fn dd_LPSolve(
lp: dd_LPPtr,
solver: dd_LPSolverType,
err: *mut dd_ErrorType,
) -> dd_booleanpub unsafe extern "C" fn dd_LPSolve(
lp: dd_LPPtr,
solver: dd_LPSolverType,
err: *mut dd_ErrorType,
) -> dd_boolean