More static library linker setup.

link_darwin_amd64.go

@@ -3,7 +3,6 @@
 package ui
 
 // #cgo LDFLAGS: ${SRCDIR}/libui_darwin_amd64.a -framework Foundation -framework AppKit -lpthread
-// /* (thanks to http://jorgen.tjer.no/post/2014/05/20/dt-rpath-ld-and-at-rpath-dyld/ for the @executable_path clarifiaction) */
 // #include <CoreFoundation/CoreFoundation.h>
 // #include <pthread.h>
 // extern void _CFRunLoopSetCurrent(CFRunLoopRef);

link_linux_386.go

@@ -5,7 +5,8 @@
 
 package ui
 
-// #cgo LDFLAGS: -L${SRCDIR} -lui -Wl,-rpath=$ORIGIN
+// #cgo LDFLAGS: ${SRCDIR}/libui_linux_386.a -Wl,-rpath=$ORIGIN
+// #cgo pkg-config: gtk+-3.0
 import "C"
 
 func ensureMainThread() {

link_linux_amd64.go

@@ -0,0 +1,14 @@
+// +build !windows
+// +build !darwin
+
+// 11 december 2015
+
+package ui
+
+// #cgo LDFLAGS: ${SRCDIR}/libui_linux_amd64.a -Wl,-rpath=$ORIGIN
+// #cgo pkg-config: gtk+-3.0
+import "C"
+
+func ensureMainThread() {
+	// do nothing; GTK+ doesn't care which thread we're on so long as we don't change it after starting
+}