I remember it works for libc++ (partially, see https://libcxx.llvm.org/Status/PSTL.html https://libcxx.llvm.org/Status/PSTL.html), but forgot when I linked agai

I remember it works for libc++ (partially, see https://libcxx.llvm.org/Status/PSTL.html https://libcxx.llvm.org/Status/PSTL.html), but forgot when I linked against libc++ last time...