In qtbase commit 7ac58d1ff0 (Make cmake
packages installed to /usr non-relocatable., 2013-02-11), we made
cmake config files non-relocatable if they were installed to
the /usr prefix. That was assumed to mean that this was a distro
or platform package, and was a workaround for the usr-move problem
on Fedora and ArchLinux.
However, cmake bug http://public.kitware.com/Bug/view.php?id=14041
showed that forcing absolute paths in this situation is not desirable
in cross compiling scenarios. CMake commit 6c613b433c45efb0bb013a6bd668cbb8ac740259
(Handle usr-move without forcing absolute paths (#14041), 2013-04-03)
addressed the problem in CMake, and this commit is an equivalent.
Change-Id: I065a6230bc618aa980fae6ca511ae10df4cd62c2
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>