--- Makefile.orig	2023-02-07 23:18:07.000000000 +0100
+++ Makefile	2023-02-09 21:57:42.966634000 +0100
@@ -46,7 +46,7 @@
 # X11 libraries on your system. (e.g. libX11-devel mesa-libGL-devel)
 #
 # Comment the line out to disable these tests.
-# GRAPHIC_TESTS = defined
+GRAPHIC_TESTS = defined
 
 # Set "GL_LIBS" to the libraries needed to link a GL program.
 GL_LIBS = -lGL -lXext -lX11
@@ -55,7 +55,7 @@
 # COMPILER CONFIGURATION: Set "CC" to the name of the compiler to use
 # to build the binary benchmarks.  You should also set "$cCompiler" in the
 # Run script to the name of the compiler you want to test.
-CC=gcc
+#CC=gcc
 
 # OPTIMISATION SETTINGS:
 # Use gcc option if defined UB_GCC_OPTIONS via "Environment variable" or "Command-line arguments".
@@ -87,7 +87,7 @@
   ## (-ffast-math) disables strict IEEE or ISO rules/specifications for math funcs
   OPTON = -O3 -ffast-math
 
-  ## OS detection.  Comment out if gmake syntax not supported by other 'make'. 
+  ## OS detection.  Comment out if gmake syntax not supported by other 'make'.
   OSNAME:=$(shell uname -s)
   ARCH := $(shell uname -p)
   ifeq ($(OSNAME),Linux)
@@ -113,6 +113,9 @@
     CFLAGS += -Wa,-q
   endif
 
+  ifeq ($(OSNAME),FreeBSD)
+	OPTON += -march=native -mtune=native -fomit-frame-pointer
+  endif
 endif