Re: How to specify a dependence on a directory?

[Peng Yu]

On Fri, Nov 20, 2009 at 5:11 PM, David Boyce <address@hidden> wrote:
> On Fri, Nov 20, 2009 at 5:42 PM, Peng Yu <address@hidden> wrote:
>> Is there way to specify a dependence on a directory?
>>
>> directory: somefile
>>  some_command
>>
>> If any file in 'directory' is older than 'somefile', then I want to
>> run 'some_command'. I'm wondering how to do this.
>
> Then you don't want a dependence on a directory. You want to depend on
> the full set of files _within_ the directory, a very different thing.
> I suspect $(wildcard $(dir)/*) is what you want.

But if there are no files in the directory, I still want some_command
to run. How to do it?