Add support for cross-compiling for Windows

Makefile

@@ -1,6 +1,9 @@
 SDL2_CONFIG = sdl2-config
 CFLAGS = -g -Ofast -std=c99 -Wall -Wextra `$(SDL2_CONFIG) --cflags --libs`
+CC_WIN = x86_64-w64-mingw32-gcc
+CFLAGS_WIN = -g -Ofast -std=c99 -Wall -Wextra -lmingw32 -lSDL2main -lSDL2
 TARGET=fox32
+TARGET_WIN=fox32.exe
 
 CFILES = src/main.c \
 		src/bus.c \
@@ -20,5 +23,10 @@ $(TARGET): $(CFILES) $(FOX32ROM_IN)
 	sed -i -e 's/fox32_rom/fox32rom/' fox32rom.h
 	$(CC) -o $@ $(filter %.c, $^) $(CFLAGS)
 
+$(TARGET_WIN): $(CFILES)
+	xxd -i $(FOX32ROM_IN) $(FOX32ROM_OUT)
+	sed -i -e 's/fox32_rom/fox32rom/' fox32rom.h
+	$(CC_WIN) -o $@ $(filter %.c, $^) $(CFLAGS_WIN)
+
 clean:
-	rm -rf fox32
+	rm -rf fox32 fox32.exe

src/bus.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/disk.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/framebuffer.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/keyboard.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/main.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <stdarg.h>
 #include <stdbool.h>

src/mmu.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/mouse.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <math.h>
 #include <stdarg.h>

src/screen.c

@@ -1,4 +1,4 @@
-#include <SDL.h>
+#include <SDL2/SDL.h>
 #include <getopt.h>
 #include <stdarg.h>
 #include <stdbool.h>

src/screen.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <SDL.h>
+#include <SDL2/SDL.h>
 
 struct Screen;