Copyright 2014 The Go Authors. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
+build aix darwin dragonfly freebsd linux netbsd openbsd solaris

package os
supportsCloseOnExec reports whether the platform supports the O_CLOEXEC flag. On Darwin, the O_CLOEXEC flag was introduced in OS X 10.7 (Darwin 11.0.0). See https://support.apple.com/kb/HT1633. On FreeBSD, the O_CLOEXEC flag was introduced in version 8.3.