Index: lib/xray/CMakeLists.txt
===================================================================
--- lib/xray/CMakeLists.txt
+++ lib/xray/CMakeLists.txt
@@ -59,6 +59,15 @@
 include_directories(../../include)
 
 set(XRAY_CFLAGS ${SANITIZER_COMMON_CFLAGS})
+
+# To cross build XRAY we need to append CMAKE_C_FLAGS  
+if(NOT MSVC AND DEFINED CMAKE_C_FLAGS)
+  set(XRAY_CROSS_COMPILE_FLAGS ${CMAKE_C_FLAGS})
+  separate_arguments(XRAY_CROSS_COMPILE_FLAGS)
+  LIST(APPEND XRAY_CFLAGS ${XRAY_CROSS_COMPILE_FLAGS})
+endif()
+
+
 set(XRAY_COMMON_DEFINITIONS XRAY_HAS_EXCEPTIONS=1)
 append_list_if(
   COMPILER_RT_HAS_XRAY_COMPILER_FLAG XRAY_SUPPORTED=1 XRAY_COMMON_DEFINITIONS)