I'm reporting this bug because the package in summary fails to build when forcing --as-needed on through spec files (check out http://blog.flameeyes.eu/2008/11/14/problems-and-mitigation-strategies-for-as-needed for details).
Check the attached build log.
Created attachment 171982 [details]
To be honest, I couldn't reproduce this. It's using the same .m4 macro as 'protobuf', so presumably this should fix it:
+ 29 Jun 2010; Samuli Suominen <firstname.lastname@example.org>
+ +files/1.0-asneeded.patch, log4cpp-1.0.ebuild:
+ Fix building with -Wl,--as-needed wrt #247067 by Diego E. Pettenò and
+ Kacper Kowalik.