Re: [9fans] mk surprises me

[Bengt Kleberg <eleberg@cbe.ericsson.se>]

> Delivered-To: 9fans@cse.psu.edu
> To: 9fans@cse.psu.edu
> Subject: Re: [9fans] mk surprises me
> From: David Gordon Hogan <dhog@plan9.bell-labs.com>


> > the behaviour i expect (cp f1.c f1, even when f1.c was older than f1,
> > provided that hdr.h was younger than f1) is the one described in
> > plan9v2 documentation. admitedly your suspicion sounds much more
> > logical than the documenation.
> > i have (as well as i can) copied the contents of the mkfile from the book.
> > perhaps this is an error in the book? (there are others).
>
> I can not find your example in the documentation.  Could you
> please provide a reference?  (Name of paper and section name,
> please).

Plan9, The Documents.
Maintaining Files on Plan9 with Mk.
page 191.

This is Plan9 v2 (with Inferno around, making it possible to avoid C, I
never bought Plan9 v3).

...deleted
> Charles' diagnonis of the problem is correct, that
> you have effectively made f1.c depend on hdr.h, but not provided
> a recipe for making f1.c, hence if hdr.h is more recent than
> f1.c, mk complains.  The solution is to change the rule so that the
> source file f1.c doesn't depend on hdr.h.
>

this is fine. thank you.


bengt