--- Makefile.orig	2022-04-29 11:21:31 UTC
+++ Makefile
@@ -33,15 +33,15 @@
 CTL_LANG=1
 
 
-CFLAGS = -Wall -Wno-unused-function -Wno-unused-but-set-variable -I/usr/include/netpbm
-LDFLAGS =
+CFLAGS := $(CFLAGS)
+LDFLAGS := $(LDFLAGS)
 LDLIBS = -ltiff -ljpeg -lnetpbm -lz -lm
 
 ifdef DEBUG
 CFLAGS := $(CFLAGS) -g
 LDFLAGS := $(LDFLAGS) -g
 else
-CFLAGS := $(CFLAGS) -O3
+CFLAGS := $(CFLAGS)
 endif
 
 ifdef EFENCE