ld .rel.dyn section ordering

[Jeff Baker <jbaker at qnx dot com>]

Is there anything other than the order of linked in objects and 
libraries on the command line that would effect the order of entries in 
the .rel.dyn section?

Our issue is this:  We ship a source bundle with our product, which is 
available for multiple hosts (windows, neutrino, linux, solaris).  To 
shortcut the testing of the source bundles we've written a tool that can 
compare elf files in an intelligent way to determine if they are 
different in any way that would effect their execution.  This allows us 
to build our source bundles on all hosts, compare to make sure the 
generated objects are all the same in a functional way and then only 
test one set.  Some of our binaries are being reported as different 
solely because the .rel.dyn section exists in a slightly different 
order.  We have people looking at the build logs to make sure the source 
is being built in an identical way on all hosts but failing that I'd 
like to understand why this reordering is occuring.