Index: cmake/caches/Android-stage2.cmake
===================================================================
--- /dev/null
+++ cmake/caches/Android-stage2.cmake
@@ -0,0 +1,52 @@
+set(LLVM_TARGETS_TO_BUILD X86;ARM;AArch64 CACHE STRING "")
+
+set(CLANG_VENDOR Android CACHE STRING "")
+set(CMAKE_BUILD_TYPE Release CACHE STRING "")
+set(LLVM_ENABLE_THREADS OFF CACHE BOOL "")
+set(LLVM_ENABLE_ASSERTIONS ON CACHE BOOL "")
+set(LLVM_LIBDIR_SUFFIX 64 CACHE STRING "")
+set(LLVM_ENABLE_LIBCXX ON CACHE BOOL "")
+
+set(ANDROID_RUNTIMES_ENABLE_ASSERTIONS ON CACHE BOOL "")
+set(ANDROID_RUNTIMES_BUILD_TYPE Release CACHE STRING "")
+set(ANDROID_BUILTINS_BUILD_TYPE Release CACHE STRING "")
+
+set(LLVM_BUILTIN_TARGETS "i686-linux-android;x86_64-linux-android;aarch64-linux-android;armv7-linux-android" CACHE STRING "")
+foreach(target i686;x86_64;aarch64;armv7)
+  set(BUILTINS_${target}-linux-android_ANDROID 1 CACHE STRING "")
+  set(BUILTINS_${target}-linux-android_CMAKE_BUILD_TYPE ${ANDROID_BUILTINS_BUILD_TYPE} CACHE STRING "")
+  set(BUILTINS_${target}-linux-android_CMAKE_ASM_FLAGS ${ANDROID_${target}_C_FLAGS} CACHE PATH "")
+  set(BUILTINS_${target}-linux-android_CMAKE_C_FLAGS ${ANDROID_${target}_C_FLAGS} CACHE PATH "")
+  set(BUILTINS_${target}-linux-android_CMAKE_SYSROOT ${ANDROID_${target}_SYSROOT} CACHE PATH "")
+  set(BUILTINS_${target}-linux-android_CMAKE_EXE_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+  set(BUILTINS_${target}-linux-android_CMAKE_SHARED_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+  set(BUILTINS_${target}-linux-android_CMAKE_MOUDLE_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+endforeach()
+
+
+set(LLVM_RUNTIME_TARGETS "i686-linux-android;x86_64-linux-android;aarch64-linux-android;armv7-linux-android" CACHE STRING "")
+foreach(target i686;x86_64;aarch64;armv7)
+  set(RUNTIMES_${target}-linux-android_ANDROID 1 CACHE STRING "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_ASM_FLAGS ${ANDROID_${target}_C_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_BUILD_TYPE ${ANDROID_RUNTIMES_BUILD_TYPE} CACHE STRING "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_C_FLAGS ${ANDROID_${target}_C_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_CXX_FLAGS ${ANDROID_${target}_CXX_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_SYSROOT ${ANDROID_${target}_SYSROOT} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_EXE_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_SHARED_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_CMAKE_MODULE_LINKER_FLAGS ${ANDROID_${target}_LINKER_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_COMPILER_RT_ENABLE_WERROR ON CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_COMPILER_RT_TEST_COMPILER_CFLAGS ${ANDROID_${target}_C_FLAGS} CACHE PATH "")
+  set(RUNTIMES_${target}-linux-android_COMPILER_RT_INCLUDE_TESTS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LLVM_ENABLE_ASSERTIONS ${ANDROID_RUNTIMES_ENABLE_ASSERTIONS} CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LLVM_ENABLE_LIBCXX ON CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LLVM_ENABLE_THREADS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LLVM_INCLUDE_TESTS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LIBCXX_USE_COMPILER_RT ON CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LIBCXXABI_USE_COMPILER_RT ON CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LIBUNWIND_HAS_NO_EXCEPTIONS_FLAG ON CACHE BOOL "")
+  set(RUNTIMES_${target}-linux-android_LIBUNWIND_HAS_FUNWIND_TABLES ON CACHE BOOL "")
+endforeach()
+
+set(RUNTIMES_armv7-linux-android_LIBCXXABI_USE_LLVM_UNWINDER ON CACHE BOOL "")
+
Index: cmake/caches/Android.cmake
===================================================================
--- /dev/null
+++ cmake/caches/Android.cmake
@@ -0,0 +1,43 @@
+# This file sets up a CMakeCache for an Android toolchain build.
+
+set(LLVM_TARGETS_TO_BUILD X86 CACHE STRING "")
+
+set(CLANG_ENABLE_ARCMT OFF CACHE BOOL "")
+set(CLANG_ENABLE_STATIC_ANALYZER OFF CACHE BOOL "")
+set(CLANG_VENDOR Android CACHE STRING "")
+
+set(CMAKE_BUILD_TYPE RELEASE CACHE STRING "")
+
+set(HAVE_LIBCXXABI ON CACHE BOOL "")
+set(LLVM_BUILD_TOOLS OFF CACHE BOOL "")
+set(LLVM_ENABLE_ASSERTIONS ON CACHE BOOL "")
+set(LLVM_ENABLE_THREADS OFF CACHE BOOL "")
+set(LLVM_LIBDIR_SUFFIX 64 CACHE STRING "")
+set(LLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD OFF CACHE BOOL "")
+set(LLVM_TOOL_OPENMP_BUILD OFF CACHE BOOL "")
+set(LLVM_ENABLE_LIBCXX ON CACHE BOOL "")
+
+if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+  list(APPEND EXTRA_ARGS -DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=${LIBCXX_ENABLE_ABI_LINKER_SCRIPT})
+endif()
+
+if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
+  list(APPEND EXTRA_ARGS -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=${LIBCXX_ENABLE_STATIC_ABI_LIBRARY})
+endif()
+
+if (LLVM_BUILD_EXTERNAL_COMPILER_RT)
+  set(APPEND EXTRA_ARGS -DLLVM_BUILD_EXTERNAL_COMPILER_RT=${LLVM_BUILD_EXTERNAL_COMPILER_RT})
+endif()
+
+get_cmake_property(variableNames VARIABLES)
+foreach(variableName ${variableNames})
+  if(variableName MATCHES "^STAGE2_")
+    string(REPLACE "STAGE2_" "" new_name ${variableName})
+    list(APPEND EXTRA_ARGS "-D${new_name}=${${variableName}}")
+  endif()
+endforeach()
+
+set(CLANG_ENABLE_BOOTSTRAP ON CACHE BOOL "")
+set(CLANG_BOOTSTRAP_CMAKE_ARGS
+  ${EXTRA_ARGS}
+  -C${CMAKE_CURRENT_LIST_DIR}/Android-stage2.cmake CACHE STRING "")