tests/legacy/cgo_pure/cgo.go - third_party/github.com/bazelbuild/rules_go - Git at Google

 //+build cgo

 package cgo_pure

 /*
 extern const int value;
 */
 import "C"

 var Value = int(C.value)
	//+build cgo

	package cgo_pure

	/*
	extern const int value;
	*/
	import "C"

	var Value = int(C.value)