Temporarily re-apply https://reviews.llvm.org/D74347

It was reverted in 35367e06b84618e21945674aa22e7cfda1957ea4
because it broke the buildbot due to missing libc++abi headers.

https://reviews.llvm.org/D75991 improves the diagnostics, so I hope
the build log will be more informative.

diff --git a/clang/cmake/caches/CrossWinToARMLinux.cmake b/clang/cmake/caches/CrossWinToARMLinux.cmake
index 50957b1..7a6af73 100644 (file)
--- a/clang/cmake/caches/CrossWinToARMLinux.cmake
+++ b/clang/cmake/caches/CrossWinToARMLinux.cmake
@@ -83,6 +83,9 @@ set(LIBCXX_USE_COMPILER_RT                  ON CACHE BOOL "")
 set(LIBCXX_TARGET_TRIPLE                    "${CMAKE_C_COMPILER_TARGET}" CACHE STRING "")
 set(LIBCXX_SYSROOT                          "${DEFAULT_SYSROOT}" CACHE STRING "")
 set(LIBCXX_ENABLE_SHARED                    OFF CACHE BOOL "")
+set(LIBCXX_CXX_ABI                          "libcxxabi" CACHE STRING "")
+set(LIBCXX_CXX_ABI_INCLUDE_PATHS            "${CMAKE_SOURCE_DIR}/../libcxxabi/include" CACHE PATH "")
+set(LIBCXX_CXX_ABI_LIBRARY_PATH             "${CMAKE_BINARY_DIR}/lib/${CMAKE_C_COMPILER_TARGET}/c++" CACHE PATH "")
 
 set(BUILTINS_CMAKE_ARGS                     "-DCMAKE_SYSTEM_NAME=Linux;-DCMAKE_AR=${CMAKE_AR}" CACHE STRING "")
 set(RUNTIMES_CMAKE_ARGS                     "-DCMAKE_SYSTEM_NAME=Linux;-DCMAKE_AR=${CMAKE_AR}" CACHE STRING "")