# Pastebin KjnV7WWm
on scarthgap in my `dynamic-layers/clang-layer`target/native recipe this works:
```
RUNTIME:class-native = "llvm"
TOOLCHAIN:class-native = "clang"
PREFERRED_PROVIDER_libgcc:class-native = "compiler-rt"
LIBCPLUSPLUS:class-native = "-stdlib=libc++"

RUNTIME:class-target = "llvm"
TOOLCHAIN:class-target = "clang"
PREFERRED_PROVIDER_libgcc:class-target = "compiler-rt"
LIBCPLUSPLUS:class-target = "-stdlib=libc++"
```