RE: Breaking out of a foreach loop

[Bhatt, Milan C]

I want to be able to loop through a set of optional prerequisites and
search for these files through a list of directories.

This would seem like the perfect usage model for VPATH, but since the
files are optional, I can't statically set them as prereqs in the
Makefile.

I was thinking something like this:

$(foreach file,$(FILES),
    $(foreach dir,$(DIRS),
        $(if $(wildcard $(dir)/$(file)), $(dir)/$(file);
<break_to_next_file>)))

I'd like to have the break function so that in case the optional file is
located in more than one directory, it would only return the first one.
I suppose I could use the $(firstword) functionality or something like
it to filter out the duplicate files, but I'm trying to find a clean
one-pass approach first.

Hope this makes sense...

Thanks!
Milan

-----Original Message-----
From: Noel Yap [mailto:address@hidden 
Sent: Friday, February 27, 2004 3:07 PM
To: Bhatt, Milan C
Cc: address@hidden
Subject: Re: Breaking out of a foreach loop


Think "functional programming language" rather than "procedural
programming language".

What exactly do you want to do?  Maybe there's another way to do it.

Noel

> "Bhatt, Milan C" wrote:
> 
> Hi Guys,
> 
> I just had a quick question on whether there was any way to break out
of a foreach loop when a certain condition has been reached.
> 
> I'd like to do the following:
> 
> $(foreach dir, $(DIRS), \
>         $(if <condition>,   <statement>; \
>                                        <break_out_of_loop>) )
> 
> I wasn't able to find anything in the documentation that provided this
kind of functionality.
> 
> Thanks,
> Milan
> 
>
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