I'm New! OS: Linux mint. I googled a lot and didn't Google anything, so I had to come here. I have FPC version 3.0.4 and I want to use the gtk library in my project, namely, as I understand it, it still contains Glib, gdk and gtk itself. Here, in my directory with fpc (/usr/lib/x86_64-linux-gnu/fpc/3.0.4/units/x86_64-linux/) there is only gtk2 in which there is almost nothing, and as I understand the functions, types, data structures and constants themselves are described in a slightly different place, which is called the source code. Here is my path to the source (/usr/share/fpcsrc/3.0.4/packages/) and there is also only a gtk2 folder in which gtk.pas and very little is written in it. In General, when I was figuring out where to get the functions themselves, constants, and so on. on some site I saw that one person says: It is necessary to download the source code of Pascal and look at the functions already described there (in fact, from there I learned about the source code) and threw a link to the source code of my version of FPC (3.0.4). I downloaded it and there is a gtk1 folder, in which everything is just described! But the question is why it is not in my source code in the system. If it should not be, then how to "install"this library. Please describe the solution to this problem in as much detail as possible, because I'm quite new)