/define PERL_REVISION/ {revision = $3}
/define PERL_VERSION/ {version = $3}
/define PERL_SUBVERSION/ {subvers = $3}
END {
if (subvers == 0) 
        printf "p9pvers = %d.%d\n", revision, version> "buildinfo";
else
        printf "p9pvers = %d.%d.%d\n" , revision, version, subvers> "buildinfo";
}