$ gcc -v
gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04) 

$ ls /usr/include/c++
10 11

My os version is ubuntu 22.04, gcc version is 11.4.0
I need to include a c++ 17 library located under /usr/include/c++, but I’m not sure where to find it.

Where should I download the library for c++ 17 and install in /usr/include/c++ ?