Where are the headers of the C++ standard library

Question

I wonder where on my file system I find the headers of the C++ Standard library. In particular I am looking for the definition of the vector template. I searched in /usr/inclu

Answer 1

The file location is actually compiler-dependent.

You can use the bash tool "locate" to search for any of the files that you know are in the library. eg. "locate stl_multimap.h" for me yields:

/usr/include/c++/5/bits/stl_multimap.h
/usr/include/c++/6/bits/stl_multimap.h
/usr/include/c++/7/bits/stl_multimap.h
/usr/include/c++/8/bits/stl_multimap.h
/usr/lib/gcc-snapshot/include/c++/9/bits/stl_multimap.h

Once you have a look at the directories it should become pretty obvious where everything else is too.

In each of those locations I'll find the different compiler versions of the file. For my computer, all the gcc 7.* files are in my /usr/include/c++/7 directory.

If for some horrible reason you use Windows, I'm sure that you'll be able to find an equivalent command with Powershell.