--- /dev/null
+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_START@
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_END@
+ */
+
+#ifndef __OS_INTERNAL_SHARED__
+#define __OS_INTERNAL_SHARED__
+
+#ifndef __OS_EXPOSE_INTERNALS__
+/*
+ * XXX /!\ WARNING /!\ XXX
+ *
+ * This header file describes INTERNAL interfaces to libplatform used by other
+ * libsystem targets, which are subject to change in future releases of Mac
+ * OS X and iOS. Any applications relying on these interfaces WILL break.
+ *
+ * If you are not a libsystem target, you should NOT EVER use these headers.
+ * Not even a little.
+ *
+ * XXX /!\ WARNING /!\ XXX
+ */
+#error "these internals are not for general use outside of libsystem"
+#else
+
+#ifndef __OS_EXPOSE_INTERNALS_INDIRECT__
+#define __OS_EXPOSE_INTERNALS_INDIRECT__
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#if defined(__arm__) || defined(__arm64__)
+#include <arm/arch.h>
+#endif
+
+#include <os/base.h>
+#include <os/base_private.h>
+#include <os/internal/atomic.h>
+#include <os/internal/crashlog.h>
+
+
+#endif // __OS_EXPOSE_INTERNALS__
+
+#endif // __OS_INTERNAL_SHARED__