Fix makefile

makefile

@@ -3,6 +3,7 @@ rwildcard		=	$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(sub
 ASM				:=	rgbasm
 LINKER			:=	rgblink
 FIX				:=	rgbfix
+EMULATOR		:=	bgb64
 BUILD_DIR		:=	build
 PROJECT_NAME	?=	crackme
 OUTPUT			:=	$(BUILD_DIR)/$(PROJECT_NAME)
@@ -33,6 +34,6 @@ clean:
 	rm -rf $(BUILD_DIR)
 
 exec:
-	wine ../../BGB/bgb64.exe ${BUILD_DIR}/${PROJECT_NAME}.gb
+	${EMULATOR} ${BUILD_DIR}/${PROJECT_NAME}.gb
 
 print-%  : ; @echo $* = $($*)