How to enable C++20 support for the ESP32-S3

1

I’ve seen mixed message in various posts about how to enable this. But the best i can do it have it enable c++2017. (according to __cplusplus) I was trying to enable 20 for support of default struct equality comparisons.

image
image1920×1160 159 KB

The output looks like:

src/main.cpp:5:63: note: '#pragma message: C++ standard version: 201703L'
    5 | #pragma message "C++ standard version: " STRINGIFY(__cplusplus)
      |
^
src/main.cpp:3:30: note: in definition of macro 'STRINGIFY_HELPER'    
    3 | #define STRINGIFY_HELPER(x) #x
      |                              ^
src/main.cpp:5:42: note: in expansion of macro 'STRINGIFY'
    5 | #pragma message "C++ standard version: " STRINGIFY(__cplusplus)
      |                                          ^~~~~~~~~
src/main.cpp:13:8: error: defaulted 'bool Derp::operator==(const Derp&) const' only available with '-std=c++20' or '-std=gnu++20'
   13 |   bool operator== (const Derp& other) const = default;        
      |        ^~~~~~~~
*** [.pio\build\esp32-s3-devkitm-1\src\main.cpp.o] Error 1