id summary reporter owner description type status priority milestone component version resolution keywords cc port 63418 "mkvtoolnix @41.0.0_1: fatal error: static_assert failed due to requirement 'sizeof(char) == 0' ""If you want to output boost::optional, include header """ sambthompson ryandesign "Trying to upgrade from 41.0.0_0 to _1; (seems to be the boost pg change). Calls for boost 1.76 and successfully installs it, but the mkvtoolnix build fails at: {{{ ... If you want to output boost::optional, include header ... }}} Log attached. Not sure if related, but based on notes in the portfile about being limited to 41.00 due to: {{{ # mkvtoolnix 42.0.0 and later do not build on macOS 10.12 or earlier # (at least not with the versions of libc++ included on those systems) because: # The following features of the C++11/C++14/C++17 standards are not supported by /usr/bin/clang++: # * std::optional (C++17) }}} However, not sure if boost is relying on the underlying std library feature? " defect assigned Normal ports 2.7.1 elcapitan mkvtoolnix