Cannot build gdk using gccgo

[russel]

|> go install -compiler gccgo -gccgoflags -O3 github.com/conformal/gotk3/gtk

github.com/conformal/gotk3/gdk

github.com/conformal/gotk3/gdk/gdk.go:87:40: error: invalid type conversion (cannot use type Atom as type unsafe.Pointer) return C.toGdkAtom(unsafe.Pointer(v)) ^

Looks like a similar issue to the solved GLib one?

[jrick]

Yep, try an extra uintptr cast.

[jrick]

Hi,

Were you able to successfully build the gdk package with that change? I'd be willing to merge this (and the glib fix as well) once all the gotk3 packages compile.

[russel]

I thought I had tried this, it succeeded and I had reported back, certainly I had made the edit. However clearly not. I have pulled to update which makes my stash edit useless :-( For various reasons, I am currently using Fedora 19 rather than Debian Unstable, and something is not working even with Google Go:

|> go install 
# github.com/conformal/gotk3/gtk
37: error: 'gtk_window_close' undeclared (first use in this function)

[jrick]

You need to use build tags to target an older GTK release. For example, if you're using GTK 3.8, run:

go install -tags gtk_3_8

This is documented in the README.

[russel]

Indeed. I should have remembered, sorry. Applying the one liner to the new master HEAD makes this compile oin Fedora 19 for both Google Go and GCCGO.

diff --git a/gdk/gdk.go b/gdk/gdk.go
index 1cf52ac..2a4bae7 100644
--- a/gdk/gdk.go
+++ b/gdk/gdk.go
@@ -84,7 +84,7 @@ type Atom uintptr

 // Native() returns the underlying GdkAtom.
 func (v Atom) Native() C.GdkAtom {
-       return C.toGdkAtom(unsafe.Pointer(v))
+       return C.toGdkAtom(unsafe.Pointer(uintptr(v)))
 }

 /*