depends: Fix zeromq build on OpenBSD #30565

1. 
   hebasto commented at 10:45 pm on July 31, 2024: member

   On the master branch @ 66e82dc90c598c9c42ff980693ef5367a845e1d0, the zeromq package fails to build on OpenBSD 7.5:

   0[ 19%] Building CXX object CMakeFiles/objects.dir/src/io_thread.cpp.o
   1/home/hebasto/bitcoin/depends/work/build/amd64-unknown-openbsd7.5/zeromq/4.3.5-df5b1b9f936/src/io_thread.cpp:14:22: error: static_cast from 'std::nullptr_t' to 'poller_t::handle_t' (aka 'int') is not allowed
   2    _mailbox_handle (static_cast<poller_t::handle_t> (NULL))
   3                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   41 error generated.
   

   This regression was overlooked by me in #29723.

   This PR fixes the issue by backporting an upstream commit from https://github.com/zeromq/libzmq/pull/4659.

2. depends: Fix `zeromq` build on OpenBSD 89b1d5c818
3. hebasto added the label Build system on Jul 31, 2024
4. 
   DrahtBot commented at 10:45 pm on July 31, 2024: contributor

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5. 
   hebasto commented at 10:45 pm on July 31, 2024: member

   Friendly ping @theStack :)
6. hebasto added this to the milestone 28.0 on Aug 1, 2024
7. theStack approved
8. 
   theStack commented at 1:51 am on August 1, 2024: contributor

   tACK 89b1d5c818a33440c0c497aa78721fb9b0af35a5

   Verified on OpenBSD 7.5 that building the zeromq depends build via

   0$ gmake -C depends NO_BOOST=1 NO_LIBEVENT=1 NO_QT=1 NO_SQLITE=1 NO_NATPMP=1 NO_UPNP=1 NO_USDT=1 NO_BDB=1
   

   fails on master (same error message as in the PR description) and succeeds on the PR branch. Checked also that the introduced patch matches https://github.com/zeromq/libzmq/pull/4659/commits/f9a798c9fb26124206ae2a3e72225f6d9dd8c646.

9. fanquake merged this on Aug 1, 2024
10. fanquake closed this on Aug 1, 2024

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11. hebasto deleted the branch on Aug 1, 2024

Contributors
hebasto DrahtBot theStack

Labels
Build system

Milestone
28.0