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

   <!--e57a25ab6845829454e8d69fc972939a-->

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

   <!--006a51241073e994b41acfe9ec718e94-->

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/32496.

   <!--021abf342d371248e50ceaed478a90ca-->

   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.

   <!--5faf32d7da4f0f540f40219e4f7537a3-->

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

fanquakeDrahtBotmaflcko

Review Requested
hebasto