Buildworld failure with 6.3

[Mike Clarke]

On Friday 15 February 2008, Mike Clarke wrote:

I recently posted about my problem with buildworld failing 
in /usr/src/sys/boot/i386/loader/ with the message:

/usr/obj/usr/src/sys/boot/i386/loader/../libi386/libi386.a(biosdisk.o)
(.text+0x9ff): In function `bd_opendisk': undefined reference to `uuid_is_nil'

I've since tried to update the src directory by re-running csup but still got 
the same errors but did get things working again by recovering /usr/src from 
an earlier backup and running csup to bring it up to date. I assume that 
something in the source tree had become corrupted but somehow wasn't being 
replaced by csup.

This has made me start wondering about the best way to diagnose the problem if 
it should arise again. Is there any utility which can easily check the 
integrity of the src directory to identify the offending file(s)?

-- 
Mike Clarke