depends: remove xinerama extension from libxcb #33217

1. 
   fanquake commented at 5:29 pm on August 19, 2025: member

   This is listed on https://doc.qt.io/qt-5.15/linux-requirements.html as “recommended”, and doesn’t seem to be needed (only used for windowing over multiple screens support?) , and the fact that it’s no-longer installed by default on modern linux distros (i.e Ubuntu), is annoying/confusing for users. See:

   #30061 #32097 #33197 https://bitcoin.stackexchange.com/questions/122646/libxcb-xinerama0-library-required-by-bitcoin-qt

   I haven’t tested the GUI with these changes. Just opening an alternative to #33197. Note that we also already have libxcb-cursor0 documented as a potentially missing runtime dependency (see build-unix.md).

2. depends: remove xinerama extension from libxcb

   This is listed on https://doc.qt.io/qt-5.15/linux-requirements.html as
   "recommended", however doesn't seem to be needed, and the fact that it's
   no-longer installed by default on modern linux distros, is
   annoying/confusing for users. See:
   
   https://github.com/bitcoin/bitcoin/issues/30061
   https://bitcoin.stackexchange.com/questions/122646/libxcb-xinerama0-library-required-by-bitcoin-qt
   https://github.com/bitcoin/bitcoin/pull/33197
   https://github.com/bitcoin/bitcoin/issues/32097

   8b9e99e996
3. guix: remove libxcb-xinerama.so.0 from allowed libs e9623be19a
4. DrahtBot added the label Build system on Aug 19, 2025
5. 
   DrahtBot commented at 5:29 pm on August 19, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/33217.

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6. fanquake requested review from hebasto on Aug 20, 2025
7. 
   luke-jr commented at 1:57 pm on August 20, 2025: member

   (only used for windowing over multiple screens support?)

   Deprecated by and incompatible with XRandR which was introduced in ~2001.

Contributors
fanquake DrahtBot luke-jr

Review Requested
hebasto

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