diff --git a/CMakeLists.txt b/CMakeLists.txt
index 60c86edd3..4fccd3ea6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,14 @@ endif ()
 if (NOT(PROC_TARGET_NUMBER EQUAL 0))
 	set (PROC_FLAGS ${PROC_TARGET_${PROC_TARGET_NUMBER}_FLAGS})
 endif ()
+if (PROC_LABEL STREQUAL "undefined")
+    execute_process(COMMAND uname -p OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_VARIABLE cpu)
+    if ("${cpu}" STREQUAL "unknown")
+        set(PROC_LABEL "${CMAKE_SYSTEM_PROCESSOR}")
+    else ()
+        set (PROC_LABEL "${cpu}")
+    endif ()
+endif ()
 
 # if it exists, the PROC_FORCED_LABEL value is loaded in PROC_LABEL to override the one of ProcessorTargets
 if (DEFINED PROC_FORCED_LABEL)