--- 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