diff -urN cdrtools-1.10.org/conf/aclocal.m4 cdrtools-1.10/conf/aclocal.m4
--- cdrtools-1.10.org/conf/aclocal.m4	Sat Apr 21 12:30:35 2001
+++ cdrtools-1.10/conf/aclocal.m4	Sat Apr 21 12:43:33 2001
@@ -998,6 +998,7 @@
                 [AC_TRY_RUN([
 #include <sys/types.h>
 #include <sys/mman.h>
+#include <linux/version.h>
 
 #ifndef	MAP_ANONYMOUS
 #	ifdef	MAP_ANON
@@ -1059,6 +1060,9 @@
                 break;
         }
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,0)
+	exit(1);
+#endif
         if (*addr != 'N')
                 exit(1);
         exit(0);