When describing how to compile and run a program, you may want to refer to tools suitable for this task. These tools are often language-specific, like if you have a C-compiler it is good for precisely that task – compiling C-programs.
In a programming book with views, where each view represent a specific programming language, different tool references can be made for the different views. You can see an example of this in the Section How to make it run (use the menu on the left to change view), in the book Into Programming.
You can also see how the different URLs pointing to the different tools show up on the About page for URLs.