Gentoo's Bugzilla –
Attachment 396586 Details for
Bug 539974=net-misc/tigervnc-1.3.1-r4 - ../../os/.libs/libos.a(WaitFor.o): In function `WaitForSomething': .../work/tigervnc-1.3.1/unix/xserver/os/WaitFor.c:220: undefined reference to `vncWriteBlockHandler'