Current trunk version of kdepimlibs seems to depend on >=dev-libs/libical-0.42, which is not available in Portage. Version 0.43 has been released on January, 12.
Created attachment 182277 [details] A proposed ebuild The only change to the latest in-tree ebuild that seems to be required is the download URL, which now points to Sourceforge.
*** This bug has been marked as a duplicate of bug 259239 ***