Add extra c++ arguments

[AntonM155]

I am using Sloeber 4.4.3.202402080117. When compiling a file, I get the following error message:

...xtensa-esp32-elf-g++‘ -MMD -c ’@.....
error: “requires” does not name a type
1228 | requires std::is_same_v<U, char>
“requires” only available with “-std=c++20” or “-fconcepts”

My question:
How can I add extra arguments to the C++ compiler?

Thanks in advance

[jantje]

In the project properties as described in the sloeber tutorial