--- cl-original/makefile	2021-12-03 15:53:24.000000000 +0100
+++ cl-patched/makefile	2023-04-05 18:00:03.627181152 +0200
@@ -92,7 +92,7 @@
 #
 # Standard build flags
 
-CFLAGS			= -c -D__UNIX__ -DNDEBUG -I.
+CFLAGS			= -c -D__UNIX__ -DNDEBUG -I. $(ADDFLAGS)
 CFLAGS_DEBUG	= -c -D__UNIX__ -I. -g -O1
 CFLAGS_DEBUGGCC	= -c -D__UNIX__ -I. -ggdb3 -fno-omit-frame-pointer -O1