--- Makefile.orig	2023-02-27 17:23:00 UTC
+++ Makefile
@@ -1,5 +1,5 @@
-CC=clang
-CFLAGS=-O3 -g -fomit-frame-pointer -Isrc/libdivsufsort/include -Isrc
+CC?= clang
+CFLAGS+= -Isrc/libdivsufsort/include -Isrc
 OBJDIR=obj
 LDFLAGS=