On Sun, May 04, 2008 at 01:27:41PM +0200, Sam Ravnborg wrote: > On Sun, May 04, 2008 at 11:01:37AM +0300, Adrian Bunk wrote: > > On Sun, May 04, 2008 at 08:17:41AM +0200, Sam Ravnborg wrote: > > > On Sun, May 04, 2008 at 02:15:35AM +0300, Adrian Bunk wrote: > > > > This kconfig construct described here is required in a different and > > > > much more complicated situation. > > > Please elaborate... > > > > In the hint C is described as a tristate. > > > > But you need this idiom only when A is a tristate and C is a bool. > Thats another case. > What is described is following simple situation: > > config FOO > bool "Modules" > option modules > > config A > tristate "a" > > config B > tristate "b" > depends on A > > config C > tristate "c" > depends on B > depends on A = y || A = B > > > C uses a symbol defined by A - let us name it foo(). > If C is build-in and A is a module => > link error - unable to resolve foo. > > So we say: > if A is buildin C may be built-in or module. > if A is a module C may not be built-in. > > This is what this hint describes. In your example C does not need any dependency on A at all since it is already handled through the dependency chain C->B->A. > I would certainly love to see some of the other typical cases > described too. > > We need a description that covers the LED case. And I think > you would be the best to come up with a description considering > the time you have spent investigating it. > Could you try to come up with either a suggested wording > or a patch? Roman is the one who actually fixed it: http://lkml.org/lkml/2008/4/30/615 I'm not sure whether we have often the opportunity to solve something this way. > Thanks, > Sam cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
