Function Perl_newCONSTSUB_flags 

pub unsafe fn Perl_newCONSTSUB_flags(
    my_perl: *mut PerlInterpreter,
    stash: *mut HV,
    name: *const c_char,
    len: STRLEN,
    flags: U32,
    sv: *mut SV,
) -> *mut CV

thx shim for crate::Perl_newCONSTSUB_flags.