tests/legacy/cgo_sys_hdr/foo.go - third_party/github.com/bazelbuild/rules_go - Git at Google

 package cgo_sys_hdr

 /*
 #include <sub/foo.h>
 */
 import "C"

 var x = int(C.x)
	package cgo_sys_hdr

	/*
	#include <sub/foo.h>
	*/
	import "C"

	var x = int(C.x)