Index: cmake/modules/LLDBConfig.cmake
===================================================================
--- cmake/modules/LLDBConfig.cmake
+++ cmake/modules/LLDBConfig.cmake
@@ -39,10 +39,14 @@
 endif()
 
 if (NOT LLDB_DISABLE_PYTHON)
-  if(UNIX)
+  if(UNIX AND (NOT CMAKE_LIBRARY_ARCHITECTURE))
     # This is necessary for crosscompile on Ubuntu 14.04 64bit. Need a proper fix.
-    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    if(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "x86_64")
       set(CMAKE_LIBRARY_ARCHITECTURE "x86_64-linux-gnu")
+    elseif(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "aarch64")
+      set(CMAKE_LIBRARY_ARCHITECTURE "aarch64-linux-gnu")
+    elseif(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "arm")
+      set(CMAKE_LIBRARY_ARCHITECTURE "arm-linux-gnueabi")
     endif()
   endif()
   if (MSVC)