emerging [ebuild N ] kde-base/kcontrol-3.5.2 USE="opengl ssl -arts -debug -ieee1394 -kdeenablefinal -logitech-mouse -xinerama" 0 kB as a dependency of media-sound/amarok-1.3.9 with kde-useflag set fails with the following error /bin/sh ../../libtool --silent --mode=compile --tag=CXX i686-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I. -I../ .. -I/usr/kde/3.5/include -I/usr/qt/3/include -I. -DQT_THREAD_SUPPORT -D_REENTRANT -Wno-long-long -Wun def -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -Wall -W -Wpointer- arith -DNDEBUG -DNO_DEBUG -O2 -O2 -march=pentium4 -mtune=pentium4 -fomit-frame-pointer -pipe -funroll-loops -fprefetch-loop-arrays -Wformat-security -Wmissing-format-attribute -Wno-non-virtual-dtor -fno-exceptions -fno-check-new -fno-common -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANS LATION -c -o crypto.lo `test -f 'crypto.cpp' || echo './'`crypto.cpp /bin/sh ../../libtool --silent --mode=compile --tag=CXX i686-pc-linux-gnu-g++ -DHAVE_CON
I can't reproduce this with 3.5.8 and 3.5.9. And I have no idea why this bug is still open. If you still have this problem, please file a new bug.
As I don't use Gentoo on any of my machines anymore (and hence can't reproduce the bug), and nobody ever commented on this, I'm closing the issue.