$OpenBSD: patch-Makefile,v 1.1 2018/02/04 22:03:36 bcallah Exp $

Don't hardcode PREFIX, CC, or CXX.

Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -31,7 +31,7 @@ endif
 EXE = stockfish
 
 ### Installation dir definitions
-PREFIX = /usr/local
+PREFIX ?= /usr/local
 BINDIR = $(PREFIX)/bin
 
 ### Built-in benchmark for pgo-builds
@@ -150,8 +150,8 @@ ifeq ($(COMP),)
 endif
 
 ifeq ($(COMP),gcc)
-	comp=gcc
-	CXX=g++
+	comp=${CC}
+	CXX?=g++
 	CXXFLAGS += -pedantic -Wextra -Wshadow
 
 	ifeq ($(ARCH),armv7)
