[CMake] What is a good way to exclude default library locations from install-tree rpaths?

[Alexander Neundorf]

On Tuesday 02 February 2010, Alan W. Irwin wrote:
...
> So to summarize this, I plan to filter all the many INSTALL_RPATH target
> properties I set in various parts of our build system for our applications
> and libraries using the CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES variable,
> but a much cleaner way to do this would be if CMake itself automatically
> filtered INSTALL_RPATH.  Therefore, I hope that CMake fix is implemented.
> (I assume here you always want to filter out the standard locations from
> rpath for the installed applications and libraries.  This is the assumption
> CMake appears to make for the build-tree versions of those applications and
> libraries.)
>
> Is that a trivial fix or do you want me to make a wish-list bug so the idea
> doesn't get lost?

Wish-list bug.
But before you do that, I would suggest that you try to use 
INSTALL_RPATH_USE_LINK_PATH. This will add all RPATHs which are in the build 
tree RPATH. If you know which directories you need additionally to that, you 
can add those using the INSTALL_RPATH property.
That's what we use in KDE (adding ${LIB_INSTALL_DIR} via INSTALL_RPATH) and I 
didn't hear any issues with this since a long time.

Alex