On 2018-6-1 07:24 , iEFdev wrote: > > I made a quick test on flac, adding: > > # flac is using libstdc++ (this installation is configured to use libc++) > configure.cxx_stdlib libstdc++ > > …and the rev-upgrade let it pass. > >> Please open tickets or better yet PRs for affected ports. >> >> - Josh > > Since I'm on an older system, with libcxx set in my config files - > wouldn't a ticket be a better option in case this is a no-error? Perhaps > it should be wrapped around a check for what macos version, etc? > > When searching I saw this one (non-related): > https://lists.macports.org/pipermail/macports-dev/2015-April/030230.html > > So perhaps something like: > > if {[string equal ${configure.cxx_stdlib} "libc++"]} { > configure.cxx_stdlib libstdc++ > } > > Would that be a better approach?
Unfortunately using a different stdlib than the system-wide choice is not an option for flac, as it provides libFLAC++ which is used by other things. All C++ programs need to be using the same stdlib as all the C++ libraries they use, so effectively all C++ libraries have to use the system-wide stdlib (as set in macports.conf in your case, but it's equally true if the stdlib was auto-selected based on the platform). Programs that are written in C++ but don't use or export any C++ libraries can get away with using a different stdlib. If you don't happen to have anything installed that uses libFLAC++, you of course won't see the problems resulting from a stdlib mismatch there. - Josh