Eclipse won't build project after adding .h and .cpp files - c++

Question

I created a simple C++ project and made the makefile myself.
The makefile looks like this:
all: project1.exe
clean:
rm main.o project1.exe
project1.exe: main.o
g++ -g -o project1 main.o
main.o:
g++ -c -g main.cpp
Originally I just had a main.cpp file. Everything worked until I created a new class (Token.h) and added it to my project. I put a new include statement at the tope of my main file, but when I try to build the project I get this message in the console:
make all
g++ -c -g main.cpp
g++ -g -o project1 main.o
Undefined symbols for architecture x86_64:
"Token::print()", referenced from:
_main in main.o
"Token::Token()", referenced from:
_main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [project1.exe] Error 1
Anybody know what I have to do in order for my project to build correctly now that I've added a class to it? Do I need to make a change to the makefile? If so, what?

Answer 1

Add a rule to your makefile:
token.o : token.cpp token.hpp
g++ -g -c token.cpp
Modify some rules in your makefile:
main.o: main.cpp token.hpp
g++ -g -c main.cpp
project.exe : main.o token.o
g++ -o project.exe main.o token.o
In the above fragment, the token.hpp class was added as a dependency to main.o. The token.o file was added as a dependency to project.exe and as a parameter to the linking phase.