<URL: https://rt.cpan.org/Ticket/Display.html?id=88936 > Attached patch changes -g3 to -g for this 2.062 release. It's only a cc problem, not ld. I've checked older perl debugging releases with optimize containing -g3 and they failed with the same problem, so it's definitely only a problem with a MACRO with the update to 2.062. Patch also at https://github.com/rurban/Compress-Raw-Zlib -- Reini UrbanThread Previous