Cleaner way to conditionally disallow a CONFIG option as static

Cleaner way to conditionally disallow a CONFIG option as static

[Sridhar Samudrala]

SCTP is allowed to be static only when IPV6 is also configured as static or
not enabled. If IPV6 is configured as a module, SCTP also has to be a module.
This is done right now in the following hackish ways in 2.6 and 2.4 using an
additional config option(CONFIG_IPV6_SCTP__).

In 2.6, net/sctp/Kconfig

config IPV6_SCTP__
	tristate
	default y if IPV6=n
	default IPV6 if IPV6

config IP_SCTP
	tristate "The SCTP Protocol (EXPERIMENTAL)"
	depends on IPV6_SCTP__
--------------------------------------------------------
In 2.4, net/sctp/Config.in

if [ "$CONFIG_IPV6" != "n" ]; then
   define_bool CONFIG_IPV6_SCTP__ $CONFIG_IPV6
else
   define_bool CONFIG_IPV6_SCTP__ y
fi

dep_tristate '  The SCTP Protocol (EXPERIMENTAL)' CONFIG_IP_SCTP $CONFIG_IPV6_SCTP__
--------------------------------------------------------

Is there a much simpler and cleaner way to accomplish this in 2.6 and 2.4
config files?

Thanks
Sridhar

Re: Cleaner way to conditionally disallow a CONFIG option as static

[Roman Zippel]

Hi,

On Mon, 8 Mar 2004, Sridhar Samudrala wrote:

> In 2.6, net/sctp/Kconfig
>
> config IPV6_SCTP__
> 	tristate
> 	default y if IPV6=n
> 	default IPV6 if IPV6
>
> config IP_SCTP
> 	tristate "The SCTP Protocol (EXPERIMENTAL)"
> 	depends on IPV6_SCTP__

This can be written as:

config IP_SCTP
	tristate "The SCTP Protocol (EXPERIMENTAL)"
	depends on IPV6 || IPV6=n

bye, Roman

Re: Cleaner way to conditionally disallow a CONFIG option as static

[Sridhar Samudrala]

On Wed, 10 Mar 2004, Roman Zippel wrote:

> Hi,
>
> On Mon, 8 Mar 2004, Sridhar Samudrala wrote:
>
> > In 2.6, net/sctp/Kconfig
> >
> > config IPV6_SCTP__
> > 	tristate
> > 	default y if IPV6=n
> > 	default IPV6 if IPV6
> >
> > config IP_SCTP
> > 	tristate "The SCTP Protocol (EXPERIMENTAL)"
> > 	depends on IPV6_SCTP__
>
> This can be written as:
>
> config IP_SCTP
> 	tristate "The SCTP Protocol (EXPERIMENTAL)"
> 	depends on IPV6 || IPV6=n
>

Thanks. Your 2.6 solution helped me come up with the following solution for
2.4 too and avoid the hack.

if [ "$CONFIG_IPV6" = "n" ]; then
  tristate '  The SCTP Protocol (EXPERIMENTAL)' CONFIG_IP_SCTP
else
  dep_tristate '  The SCTP Protocol (EXPERIMENTAL)' CONFIG_IP_SCTP $CONFIG_IPV6
fi

Thanks
-Sridhar