Good info about the flag that I didn’t knew.
It is not that I so want to use c++14 feature (may be one day…), but that I was very surprise that nodiscard works on PIO, because in verbose , it is said it is compiling c++11…
Is that some feature of ++14 have been introduce before by peace ?
I could now see that the version differ from the arduino version (I add once have to use SAMD compiler for a DUE sketch because of a bug…) but I did not find what outside bugfix are change between them…
Regards.
Nitrof