-march=cooperlake requires gcc10

cmake/system.cmake

@@ -46,7 +46,14 @@ endif ()
 
 if (DEFINED TARGET)
   if (${TARGET} STREQUAL "COOPERLAKE" AND NOT NO_AVX512)
-    set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -march=cooperlake")
+    if (${CMAKE_C_COMPILER_ID} STREQUAL "GNU")
+      execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+        if (${GCC_VERSION} VERSION_GREATER 10.1 OR ${GCC_VERSION} VERSION_EQUAL10.1)
+          set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -march=cooperlake")
+        else()
+          set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -march=skylake-avx512")
+        endif()
+    endif()    
   endif()
   if (${TARGET} STREQUAL "SKYLAKEX" AND NOT NO_AVX512)
     set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -march=skylake-avx512")