Re: how to deal if source code and object file are in different directory?

[Philip Guenther]

On 8/31/06, Lin George <address@hidden> wrote:
> I have two further questions,
>
> 1. when you say "a pattern rule" or "static pattern
> rule", do you mean the built-in implicit rules of GNU
> Make?

Nope.  The terms "pattern rule" and "static pattern rule" are
described in the GNU make info pages.  Please check there for the full
explanations.


> 2. This line you suggested,
>
> > $(OBJ_DIR): debug/%.o: src/%.c
>
> I am confused about it. Since there are two : sign,
> means two dependencies? In one line?

Nope.  The presence of two colons is part of what makes this a static
pattern rule.  That line specifies that for each file in the
$(OBJ_DIR) variable, make should try to match the pattern "debug/%.o"
against it.  If that succeeds, then make should act like there's a
rule building that file with a dependency on the matching file
"src/%.c"


Philip Guenther