Provide the details of installed libraries for compiling applications.

# To get the list of libraries and their dependencies:
pkg-config --libs <library1 library2 ...>

# To get the list of libraries, their dependencies, and proper cflags for gcc:
pkg-config --cflags --libs <library1 library2 ...>

# To compile your code with libgtk-3, libwebkit2gtk-4.0 and all their dependencies:
c++ example.cpp $(pkg-config --cflags --libs gtk+-3.0 webkit2gtk-4.0) -o example