[yocto] how can i figure out where a particular kernel config option came from?

[Robert P. J. Day]

  short version: with a short BSP layer i've been handed, the eventual
kernel .config file ends up with the setting:

  CONFIG_WIRELESS=y

which makes no sense as the target board has no wireless and the BSP
itself doesn't set that, so how can i start tracking back to figure
out where that particular setting came from?

  long version: i'm actually using Wind River Linux 7, but the
question remains the same. it turns out that CONFIG_WIRELESS is
selected by CONFIG_WLAN, so i'm really after what sets CONFIG_WLAN. i
don't see it in the BSP layer, so i'm tracing back to the WR kernel
recipe, and possibly features templates and any other kernel .cfg
snippets i can find, so far with no luck.

  in either case, is there a log file that lists *precisely* which
kernel config snippets contributed to the final .config file? thanks.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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