[libc-commits] [libc] [libc] raise CMAKE_CXX_STANDARD to C++20 (PR #87020)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

Probably should mention that there was some change to C++20 from C++17 around aggregate initialization.
https://stackoverflow.com/questions/57271400/why-does-aggregate-initialization-not-work-anymore-since-c20-if-a-constructor

https://github.com/llvm/llvm-project/pull/87020