How is the C++ standard library linked to my application?

Question

When I usually use code (include headers) from 3rd party (non-standard) C++ libraries, a pre-built binary file is linked to (or included in) the target executable that repre

Answer 1

Most of it's all in the header files, because it's so heavily templated. Very little requires libstdc++.so (iostream, may be it, I think).