--- Makefile.orig	2021-04-07 08:51:10.000000000 +0200
+++ Makefile	2021-04-07 08:58:44.000000000 +0200
@@ -2,13 +2,12 @@
 ##### Configurable options:
 
 ## Compiler:
-CC=gcc
 #CC=cc
 
 ## Compiler flags:
 
 # GCC:  (also -march=pentium etc, for machine-dependent optimizing)
-CFLAGS=-Wall -O3 -fomit-frame-pointer -funroll-loops
+CFLAGS += -Wall -O3
 
 # GCC w/ debugging:
 #CFLAGS=-Wall -g -DINLINE=