// we must also put the full action ID into the binary's action ID hash.
			if p1.Name == "main" {
				fmt.Fprintf(h, "packagemain %s\n", a1.buildID)
			}
			if p1.Shlib != "" {
				fmt.Fprintf(h, "packageshlib %s=%s\n", p1.ImportPath, contentID(b.buildID(p1.Shlib)))
			}
		}
	}

	return h.Sum()
}

// printLinkerConfig prints the linker config into the hash h,