Increase C/C++ std compliant version

Will definitely change threads, in some way.
Check which gcc version Raspberry Pi is using.

https://www.iso-9899.info/wiki/The_Standard
https://gcc.gnu.org/onlinedocs/gcc/Standards.html
https://stackoverflow.com/questions/47529854/what-is-c17-and-what-changes-have-been-made-to-the-language
https://learn.microsoft.com/en-us/cpp/overview/install-c17-support?view=msvc-170
