[cmake-developers] usr-move v. cross-compiling

[Alexander Neundorf]

On Saturday 06 April 2013, Alexander Neundorf wrote:
> On Wednesday 03 April 2013, Brad King wrote:
> > On 04/01/2013 10:25 AM, Brad King wrote:
> > >  http://www.cmake.org/Bug/view.php?id=14041
> > > 
> > > Our usr-move changes to hard-code the "/usr" prefix conflicts with
> > > cross-compiling cases where the host side relocates a package
> > > under some new root and finds it with CMAKE_FIND_ROOT_PATH.
> > 
> > Here is a fix using a new approach to support usr-move:
> >  http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=6c613b43
> > 
> > While implementing this I realized the old approach was not
> > fully implemented in configure_package_config_file anyway
> > because while not referencing PACKAGE_PREFIX_DIR it would
> > still leave that variable set improperly after PACKAGE_INIT.
> > The new approach restores the original references to
> > PACKAGE_PREFIX_DIR in all cases but adds code to fix its
> > value in the usr-move case.
> 
> Thanks, I'll have a closer look at it later today.

So the new code is actually:
at usage-time, if the file was supposed to be installed into /lib or /usr/lib, 
resolve any symbolic links from the file's actual location and the original 
install location, and if those are the same, use the original install prefix.

Yes, I think that's much better than my previous fix, since it now decides at 
usage time what to do.

Thanks
Alex