depends: drop ltcg for Windows Qt #32496

1. 
   fanquake commented at 11:45 am on May 14, 2025: member

   The related Windows patches were dropped in 5e794e62024eef612e1fbb71c76ea54d17435c14, and “Cross-compiling does not support LTO.” (from #30997).
2. 
   DrahtBot commented at 11:45 am on May 14, 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/32496.

   Reviews

   See the guideline for information on the review process.

   Type	Reviewers
   ACK	maflcko

   If your review is incorrectly listed, please react with 👎 to this comment and the bot will ignore it on the next update.

3. DrahtBot added the label Build system on May 14, 2025
4. fanquake requested review from hebasto on Jun 3, 2025
5. depends: remove support for Windows Qt LTO builds

   The patches needed to support this were dropped in
   5e794e62024eef612e1fbb71c76ea54d17435c14 and "Cross-compiling does not
   support LTO." (from #30997), so remove it for now.

   9653ebc053
6. fanquake renamed this:
   depends: add Qt `-ltcg` for Darwin, drop it for Windows
   depends: drop `ltcg` for Windows Qt
   on Jun 4, 2025
7. fanquake force-pushed on Jun 4, 2025
8. 
   fanquake commented at 1:56 pm on June 4, 2025: member

   Qt + lto works for native, but is broken for Darwin cross builds, so dropped the second commit.
9. 
   maflcko commented at 2:56 pm on June 4, 2025: member

   lgtm ACK 9653ebc053602a30aee6d8676913306d615841cf
10. fanquake merged this on Jun 5, 2025
11. fanquake closed this on Jun 5, 2025

    ---

12. fanquake deleted the branch on Jun 5, 2025

Contributors
fanquake DrahtBot maflcko

Review Requested
hebasto

Labels
Build system