--- a/Makefile	2021-02-07 08:44:30.431585210 -0500
+++ b/Makefile	2021-02-07 08:45:28.049137672 -0500
@@ -1,10 +1,10 @@
 CC ?= gcc
 AR ?= ar
 RANLIB ?= ranlib
-CFLAGS ?= -g -Wall -O3 -Wsign-compare
+CFLAGS += -g -Wall -O3 -Wsign-compare
 LIBS = -lm -lz
 EXTRA_CFLAGS_PIC = -fpic
-LDFLAGS =
+LDFLAGS +=
 LDLIBS =
 INCLUDES =