sdl: move version logic from source code to makefile

Compile sdl.c / sdl2.c depending on CONFIG_SDLABI instead of
compiling both and have version #ifdefs in the source code.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>

ui/Makefile.objs

@@ -16,7 +16,12 @@ common-obj-$(CONFIG_CURSES) += curses.o
 common-obj-$(CONFIG_VNC) += $(vnc-obj-y)
 common-obj-$(CONFIG_GTK) += gtk.o x_keymap.o
 
-sdl.mo-objs := sdl.o sdl_zoom.o sdl2.o
+ifeq ($(CONFIG_SDLABI),1.2)
+sdl.mo-objs := sdl.o sdl_zoom.o
+endif
+ifeq ($(CONFIG_SDLABI),2.0)
+sdl.mo-objs := sdl2.o
+endif
 sdl.mo-cflags := $(SDL_CFLAGS)
 
 gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS)

ui/sdl.c

@@ -26,8 +26,6 @@
 #undef WIN32_LEAN_AND_MEAN
 
 #include <SDL.h>
-
-#if SDL_MAJOR_VERSION == 1
 #include <SDL_syswm.h>
 
 #include "qemu-common.h"
@@ -958,4 +956,3 @@ void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 
     atexit(sdl_cleanup);
 }
-#endif

ui/sdl2.c

@@ -27,8 +27,6 @@
 #undef WIN32_LEAN_AND_MEAN
 
 #include <SDL.h>
-
-#if SDL_MAJOR_VERSION == 2
 #include <SDL_syswm.h>
 
 #include "qemu-common.h"
@@ -912,4 +910,3 @@ void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 
     atexit(sdl_cleanup);
 }
-#endif