$NetBSD$

Disable the SSE4 code so that older CPU's are supported.

--- CMakeLists.txt.orig	2020-04-04 20:30:08.638946764 +0000
+++ CMakeLists.txt
@@ -24,7 +24,7 @@ IF (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CX
     ENDIF ()
 
     # Optimizations.
-    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
+    # SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
 ENDIF ()
 
 # We want RelWithDebInfo to actually include debug stuff (define _DEBUG