Dirk, thanks, got it. If you have a work-around avoiding std::filesystem then can use something like
// no filesystem support before macOS Catalina #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 // no std::filesystem #endif (derived from https://github.com/nlohmann/json/pull/3101 - some of the comments there may be of use - it also mentions MinGW etc.) The "offical" macros for macOS availability tests are AvailabilityMacros.h but they boil down to the above. Cheers, Simon > On 9/12/2022, at 11:10 AM, Dirk Eddelbuettel <e...@debian.org> wrote: > > > Simon, > > On 9 December 2022 at 10:00, Simon Urbanek wrote: > | the minimum required version for the high-sierra build is 10.13 and for > big-sur build is 11.0 (as the names imply). Although it is not unrealistic to > move Intel to macOS 10.14, it would be more problematic to move to 10.15 > since it is the version that killed 32-bit support so 10.14 is actually more > prevalent than 10.15 as a lot of users will never upgrade due to that loss. > Given that Intel binaries are there only to support legacy hardware it's > unlikely to move forward much more (i.e. I can see the immediate argument > saying that those macOS version are unsupported, but so are the machines > running them, but that doesn't mean R users won't use them). > | > | What exactly do you need the higher macOS versions for? Generally, there > were no major changes in the Mach-O format recently, so it shouldn't really > matter - the main difference would be SDK/run-time - are there specific > features you require? Some of it could be addressed by providing more recent > run-times separately - that's why I'm asking. > > In this case: std::filesystem which is from C++20 and errors on macOS. > > We will #ifdef it out of existence on that platform but use it on other > platforms where we can. > > Thaks, Dirk > > -- > dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org > ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
