Re: Pre-including a generated file

[Nikhil A. Patil]

On Wed, Aug 12, 2009 at 15:13 -0300, Leandro Lucarella wrote:
> Paul Smith, el 12 de agosto a las 13:54 me escribiste:
> > On Wed, 2009-08-12 at 14:21 -0300, Leandro Lucarella wrote:
> > > I need to use .PHONY though, because the script should be executed always.
> > > If I don't, make call the ./gen_file just the first time, and then it
> > > never gets outdated in successive make calls.
> > 
> > You can't use .PHONY or make will go into an infinite loop, because
> > every time it starts it will build the out of date file, then re-exec,
> > then build the out-of-date file again and re-exec, etc. etc.
> 
> Just for the sake of curiosity: I doesn't go into an infinite loop.
> I don't know exactly why, but it doesn't, and it doesn't emit an error or
> warning either.

I had a situation where the command to generate the included file was
faster than the filesystem timestamp precision. This practically limited
the recursion to 1 or 2 steps. If I am right, adding a "sleep 1" into
your gen_file command should cause an infinite loop.

nikhil

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> Leandro Lucarella (luca) | Blog colectivo: http://www.mazziblog.com.ar/blog/
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