Target pattern contains no '%'. Makefile

Question

I have searched this problem in google, but still don\'t have some way to resolve a problem. I have 2 Makefiles: One as example and one as my file. Example:

Answer 1

This won't work:

default:
        echo "Hello world!"

This will:

default:
	echo "Hello world!"

Can you spot the difference?

That's right, the first one has spaces, the second one has tabs. The one with spaces will give you:

Makefile:2: *** missing separator. Stop.

And this is why we cannot have nice things...