====== Programming - Make - Custom Rules ======

===== Default rule =====

<code bash>
hello : hello.c
  gcc -g -O hello.c
</code>

----

<code bash>
% : %.c
  $(CC) $(CPPFLAGS) $(CFLAGS) $< -o $@
</code>

<WRAP info>
**NOTE:**  

  * The **%** (percent signs) match anything.
  * The **$<** gets the name of the first (and in this case, only) prerequisite which is hello.c.
  * The **$@** variable gives you the name of the target (hello, for this example).

There are many more variables available.
</WRAP>

----