I maintain some CPAN modules that use libwww-perl. I'd like to have my modules work on any perl back to v5.6.0, but in testing I'm finding that HTML::Parser itself won't go back that far.
With perl v5.8.0 I get this when building: cc -c -D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O3 -DVERSION=\"3.56\" -DXS_VERSION=\"3.56\" -fPIC "-I/home/zefram/usr/perl/perl_install/perl-5.8.0-i32-f52/lib/5.8.0/i386-linux-thread-multi/CORE" -DMARKED_SECTION Parser.c Parser.xs: In function `dup_pstate': Parser.xs:290: error: `CLONEf_JOIN_IN' undeclared (first use in this function) Parser.xs:290: error: (Each undeclared identifier is reported only once Parser.xs:290: error: for each function it appears in.) make: *** [Parser.o] Error 1 With perl v5.6.0 it builds OK, but one of the tests fails: t/headparser........./\x{FEFF}/: Can't use \x{} without 'use utf8' declaration at /home/zefram/usr/perl/perl_install/perl-5.6.0-i32-f52/cpan/build/HTML-Parser-3.56/blib/lib/HTML/HeadParser.pm line 211. Compilation failed in require at t/headparser.t line 83. # Looks like your test died before it could output anything. t/headparser.........dubious Test returned status 255 (wstat 65280, 0xff00) DIED. FAILED tests 1-11 Failed 11/11 tests, 0.00% okay It works fine on v5.6.1 and v5.6.2. -zefram