There are a couple exceptions here, like Infineon/Cypress’s PSoC chips, but it sort of seems like 99% of vendors have moved to Eclipse based IDEs with full support for whatever compilers work in that ecosystem.
There’s only a handful of things that matter when it comes to generating embedded code for a specific microcontroller and most of it comes down to the format required for the final linked executable, which usually boils down to an ld script.
In general any kind of ARM chip is going to work perfectly fine with the latest C++.
Or to rephrase your comment, the real reason to use C is because all the support tooling, header files, peripheral drivers, RTOS, etc. are written in C, and there’s not a huge benefit to moving user code to C++.
There’s only a handful of things that matter when it comes to generating embedded code for a specific microcontroller and most of it comes down to the format required for the final linked executable, which usually boils down to an ld script.
In general any kind of ARM chip is going to work perfectly fine with the latest C++.
Or to rephrase your comment, the real reason to use C is because all the support tooling, header files, peripheral drivers, RTOS, etc. are written in C, and there’s not a huge benefit to moving user code to C++.