Creating rules – targets, dependencies, and actions

A rule consists of one or more targets with one or more dependencies to perform one or more actions:

<target1> <target2> ... : <dependency1> <dependency2> ...
  <action1>
  <action2>
  ...

Yes, that’s a lot of possibilities. However, we will limit ourselves to a single target for each rule. Again, remember that each action line begins with <tab>.

We can have quite a few dependencies. In our current makefile, if we change any header file, nothing happens. To fix this, we can make all of the header files dependencies for dealer. Modify your makefile to add those dependencies, as follows:

CC      = clang
CCFLAGS = -Wall -Werror -std=c17
dealer: card.c hand.c deck.c dealer.c card.h hand.h deck.h
  $(CC) $^ -o $@ $(CCFLAGS) 

Save it. In the repository, this makefile is named makefile.4a. In the terminal...