New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/23403#issuecomment-654016545

Comment:
that's because the configure script likely interprets `--with-gtk2` and `--without-gtk2` (`AC_ARG_WITH(something, ...)` makes the script recognize either `--with-something` or `--without-something` or `--without-something=yes/no/...`) as the same thing since it lacks a false branch

```
compile_for="gtk1"
AC_ARG_WITH(gtk2,
  [  --with-gtk2             Compiles for GTK2],[
  compile_for="gtk2"
  CPPFLAGS="$CPPFLAGS -DUSE_GTK2"
  AC_MSG_RESULT(Compiling for GTK2)
  ])
if test "$compile_for" = "gtk2" ; then
  AM_PATH_GTK_2_0(2.2.0, ,
            AC_MSG_ERROR(Cannot find GTK2.))
else
  AM_PATH_GTK(1.2.0, ,
            AC_MSG_ERROR(Cannot find GTK: Is gtk-config in path?))
fi
```