Makefile pattern rule fails?

Question

While using GNU-make, my Makefile has some pattern rule as:

%.o:%.c
    gcc $< -o:$@

This rule is added by me.

But when I do mak

Answer 1

Just ran through this problem.

If this is your rule:

%.o:%.c
    gcc $< -o:$@

Make sure that you have a tab and not spaces on the second line before the gcc. Took me a couple of hours to figure out. Also no ':' after the -o flag, as somebody else pointed out.