Re: [Xen-devel] [PATCH] linux-2.6.18-xen.hg: check that awk supports 'gensub' command

[Michael Abd-El-Malek <mabdelmalek@xxxxxxx>]

On Oct 10, 2007, at 4:47 AM, Keir Fraser wrote:

> On 10/10/07 08:54, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>
> > > > > Michael Abd-El-Malek <mabdelmalek@xxxxxxx> 10.10.07 04:53 >>>
> > > The linux-2.6.18-xen.hg/scripts/Makefile.xen.awk script depends  
> > > on the
> > > GNU AWK-specific function "gensub".  If another awk is used (e.g.,
> > > Debian installs mawk by default), the lack of gensub trickles  
> > > down to
> > > cause the -xen.c files to not be compiled.  This was time- 
> > > consuming to
> > > track.  So we should check that the awk program supports 'gensub'.
> > >
> > > Signed-off-by: Michael Abd-El-Malek <mabdelmalek@xxxxxxx>
> > Hmm, this seems odd: If I try to use an arbitrary function (with  
> > gawk) , I get
> > a
> > failure, which should prevent make from continuing the build. Are  
> > you saying
> > this isn't happening for you? Have you determined why?
> The implication seems to be that other awk implementations (most  
> likely mawk
> in this case) silently continue.
>
>  -- Keir
Yes, the build process would continue with mawk silently failing.   
The resulting build problems have been encountered by others before;  
see:
http://lists.xensource.com/archives/html/xen-devel/2007-07/msg00840.html

Mike

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