In file included from ReadKey.xs:7:
ppport.h:4385:10: warning: ‘WIDEST_UTYPE’ redefined
 4385 | # define WIDEST_UTYPE U64TYPE
      |          ^~~~~~~~~~~~
In file included from /usr/lib/perl5/5.42.2/core_perl/CORE/perl.h:3295,
                 from ReadKey.xs:5:
/usr/lib/perl5/5.42.2/core_perl/CORE/handy.h:1417:9: note: this is the location of the previous definition
 1417 | #define WIDEST_UTYPE PERL_UINTMAX_T
      |         ^~~~~~~~~~~~