Re: Fwd: Using select in boolean dependents of a tristate symbol

[Roman Zippel <zippel@linux-m68k.org>]

Hi,

On Thu, 13 Jul 2006, Dmitry Torokhov wrote:

> On Thursday 13 July 2006 18:58, Roman Zippel wrote:
> > Hi,
> > 
> > On Thu, 13 Jul 2006, Dmitry Torokhov wrote:
> > 
> > > config THRUSTMASTER_FF
> > >       bool "ThrustMaster FireStorm Dual Power 2 support (EXPERIMENTAL)"
> > >       depends on HID_FF && EXPERIMENTAL
> > > +       select INPUT_FF_MEMLESS
> > >       help
> > >         Say Y here if you have a THRUSTMASTER FireStore Dual Power 2,
> > >         and want to enable force feedback support for it.
> > > 
> > > Unfortunately this forces INPUT_FF_MEMLESS to always be built-in,
> > > although if HID is a module it could be a module as well. Do you have
> > > any suggestions as to how allow INPUT_FF_MEMLESS to be compiled as a
> > > module?
> > 
> > You need to directly include HID into the dependencies, only the direct 
> > dependencies for config entry are used for the select.
> >
> 
> Oh, this indeed works, thanks a lot! And I was thinking I would need to
> implement something like "select <expr> as <expr>" in kconfig ;)  

What you could do is to use "select INPUT_FF_MEMLESS if HID" to make it 
visible that this dependency is actually for select.
This point is a little subtle and I'm not completely happy with it, maybe 
I'm going to split this into two select variations - one which includes 
all the dependencies and one which only uses the config symbol to select.

bye, Roman
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