SDLPP: add .dll target for windows

sdlpp/Makefile

@@ -1,14 +1,17 @@
-CXX ?= g++
-CPPFLAGS = -std=c++14 -Wall -Wextra -pedantic
-
 MAJOR ?= 1
 MINOR ?= 0
 RELEASE ?= 0
 
 ifeq ($(OS),Windows_NT)
 UNAME_S := Windows
+CXX = cl
+CXXFLAGS = -MD -EHsc /DDLLEXPORT
+OBJEXT = obj
 else
 UNAME_S := $(shell uname -s)
+CXX ?= g++
+CXXFLAGS = -std=c++14 -Wall -Wextra -pedantic
+OBJEXT = o
 endif
 
 ifeq ($(UNAME_S),Linux)
@@ -19,28 +22,41 @@ ifeq ($(UNAME_S),Darwin)
 SDLPPLIBRARY = libsdlpp.dylib
 LIBRARYFLAGS =
 endif
+ifeq ($(UNAME_S),Windows)
+SDLPPLIBRARY = libsdlpp.dll
+LIBRARYFLAGS =
+endif
 
-OBJECTFILES = sdlpp_circlecolider.o sdlpp_circlerenderer.o sdlpp_collision.o sdlpp_common.o sdlpp_font.o sdlpp_linerenderer.o sdlpp_rectcolider.o sdlpp_rectrenderer.o sdlpp_renderer.o sdlpp_renderobject.o sdlpp_scene.o sdlpp_textrenderer.o sdlpp_texture.o sdlpp_window.o
+OBJECTFILES = sdlpp_circlecolider.${OBJEXT} sdlpp_circlerenderer.${OBJEXT} sdlpp_collision.${OBJEXT} sdlpp_common.${OBJEXT} sdlpp_font.${OBJEXT} sdlpp_linerenderer.${OBJEXT} sdlpp_rectcolider.${OBJEXT} sdlpp_rectrenderer.${OBJEXT} sdlpp_renderer.${OBJEXT} sdlpp_renderobject.${OBJEXT} sdlpp_scene.${OBJEXT} sdlpp_textrenderer.${OBJEXT} sdlpp_texture.${OBJEXT} sdlpp_window.${OBJEXT}
 
 all: ${SDLPPLIBRARY}
 
-%.o: %.cpp
-	${CXX} ${CPPFLAGS} ${LIBRARYFLAGS} -c $< -o $@
+ifeq ($(UNAME_S),Windows)
+%.${OBJEXT}: %.cpp
+	${CXX} ${CXXFLAGS} ${LIBRARYFLAGS} /c $< /Fo"$@"
+else
+%.${OBJEXT}: %.cpp
+	${CXX} ${CXXFLAGS} ${LIBRARYFLAGS} -c $< -o $@
+endif
 
 ifeq ($(UNAME_S),Linux)
 ${SDLPPLIBRARY}: ${OBJECTFILES}
-	${CXX} ${CPPFLAGS} -shared -Wl,-soname,libsdlpp.so.${MAJOR}\
+	${CXX} ${CXXFLAGS} -shared -Wl,-soname,libsdlpp.so.${MAJOR}\
 		-o ${SDLPPLIBRARY} $^
 	ln -sf ${SDLPPLIBRARY} libsdlpp.so
 	ln -sf ${SDLPPLIBRARY} libsdlpp.so.${MAJOR}
 endif
 ifeq ($(UNAME_S),Darwin)
 ${SDLPPLIBRARY}: ${OBJECTFILES}
-	${CXX} ${CPPFLAGS} -dynamiclib -install_name ${SDLPPLIBRARY}\
+	${CXX} ${CXXFLAGS} -dynamiclib -install_name ${SDLPPLIBRARY}\
 		-current_version ${MAJOR}.${MINOR} $^ -lSDL2 -lSDL2_image -lSDL2_gfx -lSDL2_ttf -o $@
 endif
+ifeq ($(UNAME_S),Windows)
+${SDLPPLIBRARY}: ${OBJECTFILES}
+	${CXX} /LD $^ /link SDL2.lib SDL2_ttf.lib SDL2_image.lib /OUT:$@ /IMPLIB:libsdlpp.lib
+endif
 
 clean:
-	${RM} *.so* *.o *.dylib
+	${RM} *.so* *.${OBJEXT} *.dylib libsdlpp*
 
 .PHONY: all clean test