无法安装gotk3，收到GdkMonitor错误

Question

I tried to use gotk3 for creating desktop application. I follow the instruction in gotk3 wiki and this installing-on-linux wiki to install it. But then I get this error while executing go get -v:

gcc errors for preamble:
In file included from ../../gotk3/gotk3/gdk/gdk_since_3_22.go:23:0:
./gdk_since_3_22.go.h:22:8: error: unknown type name 'GdkMonitor'
 static GdkMonitor *
        ^

I've tried to delete the gotk3 directory, and then trying to go get -v again, but still, it didn't work.

I also checked the GTK version that installed in my Ubuntu 16.04 using apt-cache policy libgtk2.0-0 libgtk-3-0 | grep Installed. And it shows this:

  Installed: 2.24.30-1ubuntu1.16.04.2
  Installed: 3.18.9-1ubuntu3.3

What did I do wrong? Thanks

Answer 1

GdkMonitor was introduced in GTK+ 3.22. Your version is 3.18.

go get -tags gtk_3_18 github.com/gotk3/gotk3/gtk at the very beginning of building (see here NOTE section) should fix things