noteshared/ is new directory in PIM libs that should be included somewhere. If it is not present on the system for example kjots fails to merge with linking problem. Adding noteshared/ to KMEXTRA in kdepim-common-libs solves the issue. Reproducible: Always
Thanks for reporting. This is fixed in kde overlay. Please sync. http://git.overlays.gentoo.org/gitweb/?p=proj/kde.git;a=commit;h=07032dc2c6d50b83b5e503c68bf248bec9f1083a