Adrian Bunk wrote:
On Sun, May 04, 2008 at 10:25:57AM -0700, Randy Dunlap wrote:
Sam Ravnborg wrote:
On Sun, May 04, 2008 at 03:10:14PM +0300, Adrian Bunk wrote:
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.
You are right.
Randy - what problem was it this text tried to describe/solve?
I thought that it was related to USB_STORAGE, but I don't find it
in current kernels.
If the text is misleading, it should be yanked, of course.
And other places checked, e.g.:
...
The idiom has use cases, but you need the following prerequisites:
- A and B are tristates
- B does not depend on A
- C is a bool with the semantics "enable feature C in B"
And I doubt you can put that into a useful hint.
OK, sounds like the patch is good then.
--
~Randy
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