handbook do not say about how to force to not compile sources for some device.
that is implicit that comment option or remove it to disable device from compiling.
The general format of a configuration file is quite simple. Each line contains a keyword and one or more arguments. For simplicity, most lines only contain one argument. Anything following a # is considered a comment and ignored. ++++addthis line+++++ here must be description how to not compile 'device' ++++addthisline++++
The following sections describe each keyword, in the order they are listed in GENERIC. For an exhaustive list of architecture dependent options and devices, see the NOTES file in the same directory as the GENERIC file. For architecture independent options, see /usr/src/sys/conf/NOTES.
if I comment out 'device et' or try 'nodevice et' and if_et.c contain:
aldsfjadl;fadjf NO COMPILEABLE CODE HERE
I can not build kernel at all
PS. I am not sure, but I think that this must be another PR
because this part is not related to 'doc' so I open new one:
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Status: In Progress Changed: (is less than) 2014-06-01
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