Exitf("The external toolchain does not support -mcpu=power10. " +
				" This is required to externally link GOPPC64 >= power10")
		}
	}

	// Enable/disable ASLR on Windows.
	addASLRargs := func(argv []string, val bool) []string {
		// Old/ancient versions of GCC support "--dynamicbase" and
		// "--high-entropy-va" but don't enable it by default. In
		// addition, they don't accept "--disable-dynamicbase" or