Re: Problem with static pattern rules and full path

[Dale King]

Paul D. Smith wrote:

> %% address@hidden writes:
>
>  d> But what I didn't mention is that this occurs many times throughout
>  d> my entire tree. I am doing a non-recursive make system and this can
>  d> occur in any directory and the use in one directory should not
>  d> interfere with another directory. So basically, I would want to set
>  d> the vpath for one rule and then clear it out.
>
> No.  VPATH isn't used until long after the makefiles are all read in;
> whatever value it has at the end of the parsing is the value it will
> have for all targets.
>
>
> You could do one of two things: use the VPATH variable as a
> target-specific (or pattern-specific) variable (I think this will work).
>  
No, it doesn't appear to work. I tried this, where the files /foo/a.c 
and /bar/a.c exist:

all : a.o1 a.o2

a.o1 : VPATH:=/foo
a.o1: %.o1 : %.c
       echo $@ $^

a.o2 : VPATH:=/bar
a.o2: %.o2 : %.c
       echo $@ $^

Which gives the error message:

make: *** No rule to make target `a.c', needed by `a.o1'.  Stop.

> Or, use a more restrictive pattern for vpath, so instead of:
>
>    vpath %.c ...
>
> you do something like:
>
>    vpath $(prefix)/%.c ...
>
> where the prefix variable restricts the values to match the "current"
> location, whatever that is.
>
>  
That doesn't seem to work either.