According to a tutorial on
https://developer.gnome.org/gtk-tutorial/stable/c39.html
for making GUI for c-apps the compiling syntax is
gcc base.c -o base `pkg-config --cflags --libs gtk+-2.0`
Its all about these backticksymbols and seem to be suited for POSIX on linux.
If backticks in this context is not allowed in CMD-windows - is there a workaround for compiling a GTK-app in c easily?