Errors if gperf isn't installed

[David Zeuthen]

On Mon, 2007-06-11 at 11:31 +0100, Richard Hughes wrote:
> On Wed, 2007-06-06 at 13:00 -0400, David Zeuthen wrote:
> > On Wed, 2007-06-06 at 11:47 +0100, Bastien Nocera wrote:
> > > I had some trouble yesterday with gperf not being installed but creating
> > > a .h files anyway.
> > > 
> > > This patch makes gperf itself create the file, so it would error out
> > > properly if it wasn't there.
> > 
> > This patch only gets us halfway there; for example it still breaks if
> > you run 'make clean'. Basically 'make distcheck' should pass even if
> > gperf is not installed.
> 
> Okay, what about the attached patch? "make distcheck" now passes with
> and without gperf installed.

Looks good but we should probably also test for awk... 

Thanks for looking into this.

     David