From bfd8088af5977da91874247ca98d896259b28f3a Mon Sep 17 00:00:00 2001
From: Luke Benstead <kazade@gmail.com>
Date: Fri, 9 Apr 2021 16:03:59 +0100
Subject: [PATCH] Allow the backend to be configurable

---
 CMakeLists.txt | 15 +++++++++++++++
 GL/platform.h  |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e24d87..ffc6089 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,21 @@
 cmake_minimum_required(VERSION 3.0)
 project(GLdc)
 
+# set the default backend
+if(PLATFORM_DREAMCAST)
+    set(BACKEND "kospvr" CACHE STRING "Backend to use")
+else()
+    set(BACKEND "software" CACHE STRING "Backend to use")
+endif()
+
+# List of possible backends
+set_property(CACHE BACKEND PROPERTY STRINGS kospvr software)
+
+message("\nCompiling using backend: ${BACKEND}\n")
+
+string(TOUPPER ${BACKEND} BACKEND_UPPER)
+add_definitions(-DBACKEND_${BACKEND_UPPER})
+
 set(CMAKE_C_STANDARD 99)
 
 include_directories(include)
diff --git a/GL/platform.h b/GL/platform.h
index b00072c..b8d4db5 100644
--- a/GL/platform.h
+++ b/GL/platform.h
@@ -491,7 +491,7 @@ static inline void CompilePolyHeader(PolyHeader *dst, const PolyContext *src) {
     dst->d3 = dst->d4 = 0xffffffff;
 }
 
-#ifdef __DREAMCAST__
+#ifdef BACKEND_KOSPVR
 #include "platforms/sh4.h"
 #else
 #include "platforms/software.h"