gcc makefile error: "No rule to make target ..."

Question

I'm trying to use GCC (linux) with a makefile to compile my project.

I get the following error which is can't seem to decipher in this context:

"No rule to make target 'vertex.cpp', needed by 'vertex.o'.  Stop." 

This is the makefile:

a.out: vertex.o edge.o elist.o main.o vlist.o enode.o vnode.o     g++ vertex.o edge.o elist.o main.o vlist.o enode.o vnode.o  main.o: main.cpp main.h     g++ -c main.cpp  vertex.o: vertex.cpp vertex.h     g++ -c vertex.cpp  edge.o: edge.cpp edge.h     g++ -c num.cpp  vlist.o: vlist.cpp vlist.h     g++ -c vlist.cpp  elist.o: elist.cpp elist.h     g++ -c elist.cpp  vnode.o: vnode.cpp vnode.h     g++ -c vnode.cpp  enode.o: enode.cpp enode.h     g++ -c node.cpp 

Answer 1

That's usually because you don't have a file called vertex.cpp available to make. Check that:

• that file exists.
• you're in the right directory when you make.

Other than that, I've not much else to suggest. Perhaps you could give us a directory listing of that directory.