ERROR: ctfconvert: *.o doesn't have type data to convert

I've just finished building world, and am building a custom kernel.
(11-CURRENT svn co from yesterday, and on an i386)

I see the following message emitted on every lib being processed
during the build:

ERROR: ctfconvert: *.o doesn't have type data to convert
(replace the asterisk (*) with any given library)

Will this result in an unusable kernel? Should I be concerned?

Thanks!

--Chris