Re: [PATCH glibc 5/9] glibc: Perform rseq(2) registration at C startup and thread creation (v17)

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* Szabolcs Nagy:

> The 04/28/2020 10:58, Mathieu Desnoyers wrote:
>> ----- On Apr 28, 2020, at 8:54 AM, Florian Weimer fw@xxxxxxxxxxxxx wrote:
>> > That one definitely should work.
>> > 
>> > I expect you might see this if libgcc_s.so.1 is installed into a
>> > multiarch subdirectory that upstream glibc does not search.  (The
>> > Debian patches are unfortunately not upstream.)
>> 
>> My test environment is a Ubuntu 18.04.1 LTS.
>> 
>> > 
>> > I think on my system, the built glibc can find the system libgcc_s via
>> > /etc/ld.so.cache, so I haven't seen this issue yet.
>> 
>> On my system, libgcc_s is provided here:
>> 
>> /lib/x86_64-linux-gnu/libgcc_s.so.1
>> 
>> by this package:
>> 
>> Package: libgcc1
>> Architecture: amd64
>> Version: 1:8.4.0-1ubuntu1~18.04
>
> before running the tests
>
> cp `$CC --print-file-name libgcc_s.so.1` glibc/build/dir
> cp `$CC --print-file-name libstdc++.so.6` glibc/build/dir
>
> so those toolchain libs are in the search path
> of the newly built libc when running tests.

Do you actually see the need for these steps yourself?

I guess the correct fix would be to upstream the Debian multiarch
changes and activate them automatically with a configure check on
systems that use multiarch paths.



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