> Just out of curiosity, does this run ldconfig with the correct -r
> argument if a INSTALL_ROOT= is given?
This has nothing to do with ldconfig, that is done during make install.
> I guess it's hard to tell when using INSTALL_ROOT= options as to whether
> or not it's correct to run ldconfig. Sometimes you don't want to run
> ldconfig at all (e.g. when packaging an RPM), but sometimes you do (e.g.
> when installing into an NFS Root filesystem)
Yes it is hard to tell, and probably not worth it.