On 8 Jan 2025, at 18:31, Alan Somers <asom...@freebsd.org> wrote: > > What is the newest C++ standard that we can target in src, and be > confident that it will compile on all targets? Can we use C++20?
C++17 is probably the safest one, as C++20 support in libc++ 19 is mostly done, but not entirely complete: https://libcxx.llvm.org/Status/Cxx20.html As long as you avoid modules, and the more exotic parts, you should be fine. One glaring remaining issue is that std::jthread support is still gated under -fexperimental-library, at least until libc++ 20 comes out. That said, older existing releases don't have libc++ 19 yet, and they are missing a few headers too. So it depends on whether you want to target -CURRENT only? -Dimitry
