PdfTk got broken while updating the system with emerge -uDN @world.
After the emerge:
mfld@home $ pdftk
pdftk: error while loading shared libraries: libgcj.so.14: cannot open shared object file: No such file or directory
The package only depends on gcc, and requires the libgcj library at runtime:
mfld@home $ equery g pdftk
* Searching for pdftk ...
* dependency graph for app-text/pdftk-2.02
`-- app-text/pdftk-2.02 amd64
`-- sys-devel/gcc-4.9.3 (sys-devel/gcc) amd64 [gcj]
[ app-text/pdftk-2.02 stats: packages (2), max depth (1) ]
But the version 14 of that library was not more present.
Problem solved by emerging manually with emerge -1 pdftk, to force the update of the libgjc reference to the right & latest version.
Could you please change the subject to include "app-text/pdftk" and the actual error message?
The problem reported here is already tracked by the more general issue https://bugs.gentoo.org/show_bug.cgi?id=562568, that explains that pdftk actually depends on gcj that has been removed from gcc package.
*** This bug has been marked as a duplicate of bug 562568 ***