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On Wed, 22 Sep 1999, Matti Aarnio wrote:
> As a side note, job for a aspiring kernel hacker:
What about aspiring perl hackers? :)
> In the system (for i386) there are now 565 'CONFIG_.*' entries and
> TWO 'IDEDMA_.*' entries. Scanning the system for such defines which
> are *NOT* defined in any configuration script file would be worthwhile
> job for somebody. Any takers ?
A simple perl hack that takes a list of files and greps them for CONFIG_,
each found is put in a hashtable of valid defines. Then search all *.[chS]
files for CONFIG_ and if not in the hash it is printed.
Is that anything like what you had in mind?
% ./cfg-scan.pl `find /usr/src/linux/ -name '*onfig.in'`
/usr/src/linux/include/linux/autoconf.h /usr/src/linux/.config
gives, on ac7:
/usr/src/linux/fs/locks.c: CONFIG_LOCK_MANDATORY
/usr/src/linux/fs/proc/root.c: CONFIG_SUN_OPENPROMFS_MODULE
/usr/src/linux/fs/proc/root.c: CONFIG_SUN_OPENPROMFS_MODULE
...
That will find a lot of bogus errors where people have used CONFIG_ for
their own defines, or things in comments.
And it is not a short list ... 1555
(with duplicates, and possibly incomplete "valid" list).
Btw, how do you count to 565 "legal" CONFIG_'s?
/Urban, waiting for someone who is good at perl to do the same in 4 lines ...
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