[CMake] Shared libraries cannot be found after deploying a CPack package

[Frank Stappers]

With the help of CPack we would like to make packages. Currently,
we can make packages for MAC OSX (DMG, TSGZ, GZ) and UNIX (RPM, DEB,
STGZ, GZ). For static builds (so no shared libraries) these packages
can be deployed in any directory, without any problems. For builds that
use shared libraries, the binaries inside the packages do not seem to
work, if they are deployed in a path other than the $CMAKE_INSTALL_PREFIX.

When inspecting the RPATH's binaries, they all point to the
CMAKE_INSTALL_RPATH (${CMAKE_INSTALL_PREFIX}/lib/mcrl2) where
the libraries can be found. For RPMs and DEBs, that have a fixed
deployment path, this will not be a problem. We simply
set the CMAKE_INSTALL_PREFIX to the path where we want to the deploy the
package and the problem is "solved".

Deploying DMG, STGZ and GZ packages turns to be a bit more problematic,
because a user is free to chose a custom deployment path (which is most
likely not the ${CMAKE_INSTALL_PREFIX}$). As a result, all binaries that
use shared libraries cannot be executed, because they point to
non-existing paths.

So the question is as follows: Is it possible for CPack to create
packages that can be installed in a directory that deviates from
the $CMAKE_INSTALL_PREFIX? If so, which variables/modules do I need
set/execute?

Thanks in advance for any help,
Frank Stappers