ifeq ($(OS),Darwin)
  LIB1 = libfoo.dylib
  LIB2 = libsingletondll.dylib
  SHARED_LIB_FLAG = -dynamiclib
else
ifeq ($(OS),Linux)
  LIB1 = libfoo.so
  LIB2 = libsingletondll.so
  SHARED_LIB_FLAG = --shared
else
  LIB1 = foo.dll
  LIB2 = singletondll.dll
  SHARED_LIB_FLAG = --shared
endif
endif

BIN1 = client$(BIN_SUFFIX)
SRC1 = client.cpp
OBJ1 = $(SRC1:.cpp=.o)
SRC2 = foo.cpp
OBJ2 = $(SRC2:.cpp=.o)
SRC3 = singletondll.cpp
OBJ3 = $(SRC3:.cpp=.o)

.PHONY: all clean
all: $(BIN1)

$(BIN1): $(OBJ1) $(LIB1) $(LIB2)
	$(CXX) -L. $(LDFLAGS) -o $@ $(OBJ1) $(LDLIBS) -lfoo -lsingletondll

$(LIB1): $(OBJ2)
	$(CXX) $(SHARED_LIB_FLAG) $(LDFLAGS) -o $@ $^ $(LDLIBS)

$(LIB2): $(OBJ3)
	$(CXX) $(SHARED_LIB_FLAG) $(LDFLAGS) -L. -o $@ $^ -lfoo $(LDLIBS)

clean:
	$(RM) $(BIN1)
	$(RM) $(OBJ1)
	$(RM) $(LIB1)
	$(RM) $(OBJ2)
	$(RM) $(LIB2)
	$(RM) $(OBJ3)