Got the Makefile working again, and updated the readme

Makefile

@@ -4,6 +4,9 @@ NATIVECXX = c++
 BUILD_DIRECTORY = game
 ASSETS_DIRECTORY = assets
 
+# Default options
+RENDERER ?= Texture
+
 ifeq ($(RELEASE), 1)
 	CXXFLAGS = -O3 -flto
 	LDFLAGS = -s
@@ -202,6 +205,12 @@ ifneq ($(WINDOWS), 1)
 	RESOURCES += ICON/ICON_MINI.bmp
 endif
 
+ifeq ($(RENDERER), Texture)
+	SOURCES += Backends/Rendering/SDLTexture.cpp
+else ifeq ($(RENDERER), Software)
+	SOURCES += Backends/Rendering/Software.cpp
+endif
+
 OBJECTS = $(addprefix obj/$(FILENAME)/, $(addsuffix .o, $(SOURCES)))
 DEPENDENCIES = $(addprefix obj/$(FILENAME)/, $(addsuffix .o.d, $(SOURCES)))
 

README.md

@@ -29,6 +29,8 @@ You can also add the following flags:
 * `-DFIX_BUGS=ON` - Fix bugs in the game (see [src/Bug Fixes.txt](src/Bug%20Fixes.txt))
 * `-DNONPORTABLE=ON` - Enable bits of code that aren't portable, but are what the original game used
 * `-DFORCE_LOCAL_LIBS=ON` - Compile the built-in versions of SDL2, FreeType, and FLTK instead of using the system-provided ones
+* `-DRENDERER=Texture` - Use the hardware-accelerated SDL2 Texture API renderer (default)
+* `-DRENDERER=Software` - Use the software renderer
 
 Then compile CSE2 with this command:
 
@@ -53,6 +55,8 @@ Run 'make' in this folder, preferably with some of the following settings:
 * `WINDOWS=1` - Enable Windows-only features like a unique file/taskbar icon, and system font loading (needed for the font setting in Config.dat to do anything)
 * `RASPBERRY_PI=1` - Enable tweaks to improve performance on Raspberry Pis
 * `NONPORTABLE=1` - Enable bits of code that aren't portable, but are what the original game used
+* `RENDERER=Texture` - Use the hardware-accelerated SDL2 Texture API renderer (default)
+* `RENDERER=Software` - Use the software renderer
 
 ### Visual Studio .NET 2003