Gentoo's Bugzilla –
Attachment 631900 Details for
Bug 716922x11-wm/herbstluftwm-0.8.0 USE=-xinerama without x11-libs/libXinerama - src_configure(): cmake: .../work/herbstluftwm-0.8.2/src/X11_Xinerama_INCLUDE_PATH used as include directory in directory .../work/herbstluftwm-0.8.2/src