The multiline string in lines 854-855 of the file named in the summary caused an easily repaired compiler error. (GCC-3.3.1) Reproducible: Always Steps to Reproduce:
Gentoo-sources-2.4.20-r7, by the way.
This was fixed a long time ago, it seems the rsync didn't catch up. Just remerge gentoo-sources after doing an emerge sync.