https://sourceware.org/bugzilla/show_bug.cgi?id=20283
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #0)
> Since "-z relro" makes more pages read-only after relocation, I'd
> like to make it the default if possible. The following ELF targets
> don't support "-z relro":
> 
> check.arc-linux-uclibc:FAIL: strip -z relro -shared (relro1)
> check.arc-linux-uclibc:FAIL: objcopy -z relro -shared (relro1)
> check.arc-linux-uclibc:FAIL: objcopy -z relro (tdata1)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tdata1)
> check.arc-linux-uclibc:FAIL: objcopy -z relro (tdata2)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tdata2)
> check.arc-linux-uclibc:FAIL: objcopy -z relro (tdata3)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tdata3)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tbss1)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tbss2)
> check.arc-linux-uclibc:FAIL: objcopy -shared -z relro (tbss3)

arc-linux-uclibc is fixed by

commit c0913ebfafa2c3b94e08856c3304037fa9f0906e
Author: Claudiu Zissulescu <claz...@synopsys.com>
Date:   Thu May 19 14:44:01 2016 +0200

    [ARC] Emulation and default script template changes.

    2016-05-19  Cupertino Miranda  <cmira...@synopsys.com>

        * emulparams/arcelf.sh: Changed.
        * emulparams/arclinux.sh: Likewise.
        * scripttempl/arclinux.sc: Moved to a more standard implementation
        similar to elf.sc.

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