1/ upgrade from Ubuntu 15.04 to 15.10 results in a non-executable condition for all releases of Digikam and Showfoto.
2/ compiling Digikam 4.14 from tarball will not result in a valid install.
3/ Digikam 4.12 can be installed from Ubuntu repository via synaptec. But will not run. The solution is to downgrade 2 libraries: one is for lensfun; the other I cannot recall. then uninstall digi. then re-install digi ensuring the downgraded libs are used.
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