How to replace gcc tool chain?

I want to use some C++17 new features. But current STM32CubeIDE with gcc version 7-2018-q2-update only support g++14.

If I replace gcc tool chain with the latest version, could I get what I want?

If yes, how to replace it?

If no, is there any way?

Thanks.

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Principal

See two possible approaches here

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