// incorrectly typed unsigned long. We work around that
			// by disabling the builtin functions (this is safe as
			// it won't affect the actual compilation of the C code).
			// See: https://golang.org/issue/6506.
			"-fno-builtin",
		)
	}

	c = append(c, p.GccOptions...)
	c = append(c, p.gccMachine()...)
	if goos == "aix" {
		c = append(c, "-maix64")
		c = append(c, "-mcmodel=large")
	}