Move definition of -DOSD_WINDOWS, -DOSD_SDL and -DOSD_MINI into

$(OSD).mak. Added sanity check to makefile. [Couriersud]

makefile

@@ -490,26 +490,6 @@ ifdef FASTDEBUG
 DEFS += -DMAME_DEBUG_FAST
 endif
 
-# add a define identifying the target osd
-
-ifeq ($(OSD),sdl)
-DEFS += -DOSD_SDL
-else
-ifeq ($(OSD),windows)
-DEFS += -DOSD_WINDOWS
-else
-ifeq ($(OSD),winui)
-DEFS += -DOSD_WINDOWS
-else
-ifeq ($(OSD),osdmini)
-DEFS += -DOSD_MINI
-else
-$(warning Please add -DOSD_[SDL|WINDOWS|MINI] in $(OSD).mak)
-endif
-endif
-endif
-endif
-
 #-------------------------------------------------
 # compile flags
 # CCOMFLAGS are common flags
@@ -885,6 +865,13 @@ CDEFS = $(DEFS)
 # TODO: -x c++ should not be hard-coded
 CPPCHECKFLAGS = $(CDEFS) $(INCPATH) -x c++ --enable=style
 
+#-------------------------------------------------
+# sanity check OSD additions
+#-------------------------------------------------
+
+ifeq (,$(findstring -DOSD_,$(CDEFS)))
+$(error $(OSD).mak should have defined -DOSD_)
+endif
 
 #-------------------------------------------------
 # primary targets

src/osd/osdmini/osdmini.mak

@@ -37,6 +37,8 @@
 #
 ###########################################################################
 
+# add a define identifying the target osd
+DEFS += -DOSD_MINI
 
 #-------------------------------------------------
 # object and source roots

src/osd/sdl/sdl.mak

@@ -86,6 +86,9 @@ SDL_FRAMEWORK_PATH = /Library/Frameworks/
 OSDSRC = $(SRC)/osd
 OSDOBJ = $(OBJ)/osd
 
+# add a define identifying the target osd
+DEFS += -DOSD_SDL
+
 # default to SDL2 for non-OS/2, non-Emscripten builds now
 ifndef SDL_LIBVER
 ifneq ($(TARGETOS),os2)

src/osd/windows/windows.mak

@@ -73,6 +73,9 @@
 ##################   END USER-CONFIGURABLE OPTIONS   ######################
 ###########################################################################
 
+# add a define identifying the target osd
+DEFS += -DOSD_WINDOWS
+
 
 #-------------------------------------------------
 # object and source roots