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SubjectRe: m68k Kconfig undefined symbol in 2.6.23.
On Wed, 10 Oct 2007, Rob Landley wrote:

> The m68k Kconfig tries to select a symbol (APM_EMULATION) that doesn't exist.
>
> I did this to fix it, without really understanding the larger problem. (Did
> APM go away?) Just FYI...
>
> Rob
>
> diff -r 79f0ea1e0e70 drivers/macintosh/Kconfig
> --- a/drivers/macintosh/Kconfig Tue Oct 09 21:00:40 2007 +0000
> +++ b/drivers/macintosh/Kconfig Wed Oct 10 17:17:07 2007 -0500
> @@ -116,11 +116,6 @@ config PMAC_SMU
> on the "SMU" system control chip which replaces the old PMU.
> If you don't know, say Y.
>
> -config PMAC_APM_EMU
> - tristate "APM emulation"
> - select APM_EMULATION
> - depends on ADB_PMU && PM && PPC32
> -
> config PMAC_MEDIABAY
> bool "Support PowerBook hotswap media bay"
> depends on PPC_PMAC && PPC32

the obvious problem with the above is that APM_EMULATION is defined in
kernel/power/Kconfig arch-independently thusly:

config APM_EMULATION
tristate "Advanced Power Management Emulation"
depends on PM && SYS_SUPPORTS_APM_EMULATION
help
... blah blah ...

but the Kconfig variable SYS_SUPPORTS_APM_EMULATION is defined for
only a small subset of architectures:

$ grep "config SYS_SUPPORTS_APM_EMULATION" $(find . -name Kconfig*)
./arch/mips/Kconfig:config SYS_SUPPORTS_APM_EMULATION
./arch/sh/Kconfig:config SYS_SUPPORTS_APM_EMULATION
./arch/arm/Kconfig:config SYS_SUPPORTS_APM_EMULATION
./arch/powerpc/Kconfig:config SYS_SUPPORTS_APM_EMULATION

so there's a good chance that doing a kernel config with any other
arch than those listed above that supports PM is going to generate the
same warning.

rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://crashcourse.ca
========================================================================
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