Add testlink package to provide library search path for tests

Author: anacrolix

go/cpossum/c-possum.go

@@ -6,8 +6,8 @@ package possumC
 // Windows system to get to the point I can actually build this, so I don't know how it works there.
 // Also cgo directives seem to use the old build constraint syntax. Why the fuck isn't this stuff
 // documented?
-#cgo !windows,!darwin LDFLAGS: -L${SRCDIR}/../../target/debug -l:libpossum.a -lm
-#cgo darwin windows LDFLAGS: -L${SRCDIR}/../../target/debug -lpossum
+#cgo !windows,!darwin LDFLAGS: -l:libpossum.a -lm
+#cgo darwin windows LDFLAGS: -lpossum
 #include "possum.h"
 */
 import "C"

go/cpossum/c-possum_test.go

@@ -1,8 +1,11 @@
 package possumC
 
 import (
-	qt "github.com/go-quicktest/qt"
 	"testing"
+
+	"github.com/go-quicktest/qt"
+
+	_ "github.com/anacrolix/possum/go/testlink"
 )
 
 func TestNoSuchKey(t *testing.T) {

go/go-possum_test.go

@@ -2,6 +2,8 @@ package possum
 
 import (
 	"testing"
+
+	_ "github.com/anacrolix/possum/go/testlink"
 )
 
 func TestOpenClose(t *testing.T) {

go/testlink/testlink.go

@@ -0,0 +1,4 @@
+package testlink
+
+//#cgo LDFLAGS: -L${SRCDIR}/../../target/debug
+import "C"