--- Makefile.orig	2023-05-04 04:46:08 UTC
+++ Makefile
@@ -1,9 +1,9 @@
 TARGET_EXEC := 3d-ascii-viewer
 TEMPDIR := tmp
 
-CC      := gcc
-CFLAGS  := -Wall
-LDFLAGS := -lm -lncurses
+CC      ?= gcc
+CFLAGS  += -Wall
+LDFLAGS += -lm -lncurses
 SRC_DIR := src
 
 SRCS := $(shell find $(SRC_DIR) -name '*.c')