From 0c3a04777cc5fa8bc43b57b789e72630781ef56a Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 6 Oct 2016 11:50:29 -0400
Subject: [PATCH] Android: Update libc++ include directories for NDK r13

The Android NDK r13 moved the libc++ include directories.

Closes: #16346
---
 Modules/Platform/Android/ndk-stl-c++.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Modules/Platform/Android/ndk-stl-c++.cmake b/Modules/Platform/Android/ndk-stl-c++.cmake
index 14748a198..cb9fd6837 100644
--- a/Modules/Platform/Android/ndk-stl-c++.cmake
+++ b/Modules/Platform/Android/ndk-stl-c++.cmake
@@ -3,7 +3,13 @@ set(_ANDROID_STL_RTTI 1)
 set(_ANDROID_STL_EXCEPTIONS 1)
 macro(__android_stl_cxx lang filename)
   # Add the include directory.
-  __android_stl_inc(${lang} "${CMAKE_ANDROID_NDK}/sources/cxx-stl/llvm-libc++/libcxx/include" 1)
+  if(EXISTS "${CMAKE_ANDROID_NDK}/sources/cxx-stl/llvm-libc++/libcxx/include/cstddef")
+    # r12 and below
+    __android_stl_inc(${lang} "${CMAKE_ANDROID_NDK}/sources/cxx-stl/llvm-libc++/libcxx/include" 1)
+  else()
+    # r13 and above
+    __android_stl_inc(${lang} "${CMAKE_ANDROID_NDK}/sources/cxx-stl/llvm-libc++/include" 1)
+  endif()
 
   # Add a secondary include directory if it exists.
   __android_stl_inc(${lang} "${CMAKE_ANDROID_NDK}/sources/android/support/include" 0)