P2198R7 Freestanding Feature-Test Macros And Implementation-Defined Extensions

[StephanTLavavej]

WG21-P2198R7 Freestanding Feature-Test Macros And Implementation-Defined Extensions

See the paper for exactly which feature-test macros are provided.

I don't know whether there's anything for our hosted implementation to do here.

Note: We're focused on implementing the remaining library-only features in C++23. Until that's done, we will NOT be accepting PRs for C++26 features.

[frederick-vs-ja]

The paper apparently requires hosted implementations to define all __cpp_lib_freestanding_* macros as the new-val (202306L).