why this Makefile doesn’t works?

I have a problem with this Makefile, I get a strange gtkmm error. CXX=g++ MYSQL_DIR= “C:/Program Files/MySQL/Connector C++ 1.1/” CXXFLAGS=-Wall -std=c++11 $(shell pkg-config –cflags gtkmm-3.0) -I$(MYSQL_DIR)/include L$(MYSQL_DIR)/lib OBJECTS= main.o MainWindow.o Affitto.o Inquilino.o Stabile.o Conguaglio.o LDLIBS=$(shell pkg-config –libs gtkmm-3.0) AffittiApp: $(OBJECTS) $(CXX) $(CXXFLAGS) $(LDLIBS) -o AffittiApp $(OBJECTS) main.o: MainWindow.h MainWindow.cpp Affitto.h Affitto.cpp Conguaglio.h Conguaglio.cpp Inquilino.h Inquilino.cpp…

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