Follow-up Comment #4, bug #17646 (project hurd):
glibc 2.6 indeed needs (a lot) more work to make it usable on Hurd systems.
The thing glibc 2.6 changed w.r.t. ``-z relro'' was ``only'' that it is no
longer possible to switch it off via the command line
``libc_cv_z_relro=no''.
For me, the (only!) test case that illustrates the problem was to use a ``-z
relro'' enabled glibc to build the Hurd servers, boot a system with those
(e.g. a subhurd) and then one of the core Hurd servers (perhaps the root file
system, but I don't remember at the moment) would segfault (also not sure
about that, but that's what it was, I think). I once was spending some time
working on debugging that, but didn't find the cause of the segfault so far.
I think I took some notes about what I did, in case you are interested.
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