$OpenBSD: patch-Makefile,v 1.2 2018/11/30 19:54:29 bcallah Exp $

Don't hardcode PREFIX, CC, or CXX.

Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -29,7 +29,7 @@ EXE = stockfish
 endif
 
 ### Installation dir definitions
-PREFIX = /usr/local
+PREFIX ?= /usr/local
 BINDIR = $(PREFIX)/bin
 
 ### Built-in benchmark for pgo-builds
@@ -154,8 +154,8 @@ ifeq ($(COMP),)
 endif
 
 ifeq ($(COMP),gcc)
-	comp=gcc
-	CXX=g++
+	comp=${CC}
+	CXX?=g++
 	CXXFLAGS += -pedantic -Wextra -Wshadow
 
 	ifeq ($(ARCH),armv7)
