can someone correct me if my thinking is out of whack here?
consider init/Kconfig:
...
config IKCONFIG
tristate "Kernel .config support"
---help---
This option enables the complete Linux kernel ".config" file
contents to be saved in the kernel. It provides documentation
of which kernel options are used in a running kernel or in an
on-disk kernel. This information can be extracted from the kernel
image file with the script scripts/extract-ikconfig and used as
input to rebuild the current kernel or to build another kernel.
It can also be extracted from a running kernel by reading
/proc/config.gz if enabled (below).
config IKCONFIG_PROC
bool "Enable access to .config through /proc/config.gz"
depends on IKCONFIG && PROC_FS
---help---
This option enables access to the kernel configuration file
through /proc/config.gz.
...
now why is IKCONFIG tristate instead of simple bool? it's used
solely as a dependency for IKCONFIG_PROC, and that's used in
kernel/configs.c thusly:
...
#ifdef CONFIG_IKCONFIG_PROC
...
#endif
...
so it's easy to see that it should be selectable, but it's *not*
clear to see why it should be *tristate*. what is the value of its
tristate-ness? thanks.
rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
Have classroom, will lecture.
http://crashcourse.ca Waterloo, Ontario, CANADA
========================================================================
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