Make dynamic library work on macos

tetris/Makefile

@@ -3,11 +3,28 @@ CFLAGS ?= -O2 -Wall -Wextra -std=c++14
 PREFIX ?= /usr/local/bin
 LDFLAGS ?= -lSDL2 -lSDL2_image -lSDL2_gfx -lSDL2_ttf -pthread
 
+ifeq ($(OS),Windows_NT)
+UNAME_S := Windows
+else
+UNAME_S := $(shell uname -s)
+endif
+
+TETRIS_OBJECTS = tetris.o scenes.o config.o functions.o global_vars.o
+
+ifeq ($(UNAME_S),Linux)
+TETRIS_OBJECTS += libsdlpp.so
+SDLLIB = libsdlpp
+endif
+ifeq ($(UNAME_S),Darwin)
+TETRIS_OBJECTS += libsdlpp.dylib
+SDLLIB = sdlpp
+endif
+
 .PHONY: default
 default: tetris
 
-tetris: tetris.o scenes.o config.o functions.o global_vars.o libsdlpp.so
-	$(CXX) $(CFLAGS) -o $@ $^ ${LDFLAGS} -L -llibsdlpp
+tetris: ${TETRIS_OBJECTS}
+	$(CXX) $(CFLAGS) -o $@ $^ ${LDFLAGS} -L $(shell pwd) -l${SDLLIB}
 
 tetris.o: tetris.cpp ../sdlpp/sdlpp.hpp config.hpp custom_classes.hpp scenes.hpp global_vars.hpp functions.hpp
 	$(CXX) $(CFLAGS) -c -o $@ $<
@@ -23,6 +40,9 @@ libsdlpp.so: ../sdlpp
 	$(MAKE) -C ../sdlpp
 	cp ../sdlpp/libsdlpp.so .
 	ln -sf libsdlpp.so libsdlpp.so.1
+libsdlpp.dylib: ../sdlpp
+	$(MAKE) -C ../sdlpp
+	cp ../sdlpp/libsdlpp.dylib .
 
 start:
 	LD_LIBRARY_PATH=$$(pwd) ./tetris