See attached build log.
(Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 244275 [details]
Build log (compressed)
Created attachment 257419 [details, diff]
patch for qconf-1.5_pre717.ebuild to respect LDFLAGS
Try to fix LDFLAGS.
As a side effect of using qt4-r2.eclass and eqmake4, it now honours CXX too.
USE=extras emerge net-im/psi
still works but no other tests done.
Thank you Gavin and Diego. I've added eqmake4 workaround.