CMAKE_STAGING_PREFIX
--------------------

This variable may be set to a path to install to when cross-compiling. This can
be useful if the path in :variable:`CMAKE_SYSROOT` is read-only, or otherwise
should remain pristine.

The CMAKE_STAGING_PREFIX location is also used as a search prefix by the ``find_*``
commands. This can be controlled by setting the :variable:`CMAKE_FIND_NO_INSTALL_PREFIX`
variable.

If any RPATH/RUNPATH entries passed to the linker contain the CMAKE_STAGING_PREFIX,
the matching path fragments are replaced with the :variable:`CMAKE_INSTALL_PREFIX`.
