Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -266,6 +266,13 @@
   list(APPEND SANITIZER_COMMON_CFLAGS -fno-modules)
 endif()
 
+# To cross build we need to append CMAKE_CXX_FLAGS
+if (NOT MSVC AND DEFINED CMAKE_CXX_FLAGS)
+  set(CROSS_COMPILE_FLAGS ${CMAKE_CXX_FLAGS})
+  separate_arguments(CROSS_COMPILE_FLAGS)
+  list(APPEND SANITIZER_COMMON_CFLAGS ${CROSS_COMPILE_FLAGS})
+endif()
+
 # Turn off several warnings.
 append_list_if(COMPILER_RT_HAS_WGNU_FLAG -Wno-gnu SANITIZER_COMMON_CFLAGS)
 append_list_if(COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG -Wno-variadic-macros SANITIZER_COMMON_CFLAGS)