[bug#40556] [PATCH] gnu: dovecot: Add libunwind input.

[Pierre Langlois]

Hi Guix, Julien,

I noticed I couldn't build dovecot on either aarch64 or arm :-/. I did a
little bit of debugging, and it looks like the backtrace_symbols()
function isn't working correctly. Dovecot is able to use libunwind
instead, and this appears to work.

I then noticed it was reported upstream already, coming to the same
conclusion https://markmail.org/message/fjgo7lkuk7tk4iek

I wonder what's wrong with backtrace_symbols() in guix, I'm not sure how
to investigate that. For now though, what do you think of using
libunwind?

Thanks,
Pierre

0001-gnu-dovecot-Add-libunwind-input.patch
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