Index: src/CMakeLists.txt
--- src/CMakeLists.txt.orig
+++ src/CMakeLists.txt
@@ -291,7 +291,7 @@ else() # Linux
     sm_add_compile_definition("${SM_EXE_NAME}" HAVE_LIBPTHREAD)
 
     message("Host processor is ${CMAKE_SYSTEM_PROCESSOR}")
-    if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64" OR CMAKE_SYSTEM_PROCESSOR MATCHES "amd64")
       message("Host processor is 64bit")
       sm_add_compile_definition("${SM_EXE_NAME}" CPU_X86_64)
     elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86" OR CMAKE_SYSTEM_PROCESSOR MATCHES "i686")
