D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before '*' token
 #    define PERL_GET_THX  ((PerlInterpreter *)PERL_GET_CONTEXT)
                                             ^
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:45: error: expected ')' before '*' token
D:\devel\perl\perl\lib\CORE/perl.h:3544:29: error: expected ';' at end of member declaration
 #    define PERL_GET_THX  ((PerlInterpreter *)PERL_GET_CONTEXT)

... and so on ...