linker input file unused because linking not done - c++

Question

I have a problem when I compile my program, I have been trying some solutions on Questions but it doesnt work for me, so here is my problem
INCLUDE = include
LIB = lib
OBJ = obj
SRC = src
BIN = bin
CXX = g++
CPPFLAGS = -Wall -g -c
$(BIN)/pruebacronologia : $(OBJ)/pruebacronologia.o
$(CXX) -o $(BIN)/pruebacronologia $(OBJ)/EventoHistorico.o $(SRC)/EventoHistorico.cpp -I$(INCLUDE)
$(OBJ)/EventoHistorico.o : $(SRC)/EventoHistorico.cpp
$(CXX) $(CPPFLAGS) -o $(OBJ)/EventoHistorico.o $(SRC)/EventoHistorico.cpp -I$(INCLUDE)
$(OBJ)/cronologia.o : $(SRC)/cronologia.cpp $(OBJ)/EventoHistorico.o
$(CXX) $(CPPFLAGS) -o $(OBJ)/cronologia.o $(SRC)/cronologia.cpp $(OBJ)/EventoHistorico.o -I$(INCLUDE)
$(OBJ)/pruebacronologia.o : $(SRC)/pruebacronologia.cpp $(OBJ)/cronologia.o
$(CXX) $(CPPFLAGS) -o $(OBJ)/pruebacronologia.o $(SRC)/pruebacronologia.cpp $(OBJ)/cronologia.o $(OBJ)/EventoHistorico.o -I$(INCLUDE)
Then i get this error on bash:
g++: warning: obj/cronologia.o: linker input file unused because linking not done
g++: warning: obj/EventoHistorico.o: linker input file unused because linking not done
g++ -o obj/EventoHistorico.o -Iinclude
g++: fatal error: no input files
compilation terminated.
make: *** [bin/pruebacronologia] Error 4

Answer 1

Your makefile seems to be not well construct. For each target .o, just set a .o compiled from the corresponding .c file.
To contruct the executable, just append all .o generated.
I think something like this will work better :
INCLUDE = include
LIB = lib
OBJ = obj
SRC = src
BIN = bin
CXX = g++
CPPFLAGS = -Wall -g -c
$(BIN)/pruebacronologia : $(OBJ)/cronologia.o $(OBJ)/pruebacronologia.o $(OBJ)/EventoHistorico.o
$(CXX) -o $(BIN)/pruebacronologia $^ $(LDFLAGS)
$(OBJ)/EventoHistorico.o : $(SRC)/EventoHistorico.cpp
$(CXX) $(CPPFLAGS) -o $(OBJ)/EventoHistorico.o $(SRC)/EventoHistorico.cpp -I$(INCLUDE)
$(OBJ)/cronologia.o : $(SRC)/cronologia.cpp
$(CXX) $(CPPFLAGS) -o $(OBJ)/cronologia.o $(SRC)/cronologia.cpp -I$(INCLUDE)
$(OBJ)/pruebacronologia.o : $(SRC)/pruebacronologia.cpp
$(CXX) $(CPPFLAGS) -o $(OBJ)/pruebacronologia.o $(SRC)/pruebacronologia.cpp -I$(INCLUDE)