doc: Remove outdated -fdebug-prefix-map section in dev notes #34413

1. 
   maflcko commented at 4:17 pm on January 26, 2026: member

   This removes some docs. See the commit messages for an explanation.
2. doc: Remove outdated -fdebug-prefix-map section in dev notes

   The section claims to be for ccache builds, however those are already
   fixed after commit 1cc58d3a0c653ac30df04d1010a3cf84c6bc307a.
   
   If there are still any build or debug problems after that commit,
   dedicated instructions can be added back, along with exact steps to
   reproduce and test.

   fa06cd4ba7
3. DrahtBot renamed this:
   doc: Remove outdated -fdebug-prefix-map section in dev notes
   doc: Remove outdated -fdebug-prefix-map section in dev notes
   on Jan 26, 2026
4. DrahtBot added the label Docs on Jan 26, 2026
5. 
   DrahtBot commented at 4:17 pm on January 26, 2026: 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/34413.

   Reviews

   See the guideline for information on the review process.

   Type	Reviewers
   ACK	l0rinc, sedited
   Concept ACK	hebasto

   If your review is incorrectly listed, please copy-paste <!–meta-tag:bot-skip–> into the comment that the bot should ignore.

   Conflicts

   Reviewers, this pull request conflicts with the following ones:

   • #31723 (qa: Facilitate debugging bitcoind inside functional tests by hodlinator)

   If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

6. 
   hebasto commented at 4:34 pm on January 26, 2026: member

   Concept ACK.
7. build: Remove outdated comment about -ffile-prefix-map

   The -ffile-prefix-map option is no longer used and it seems fine to
   remove the warning about it possibly breaking coverage builds.
   
   If this needs documentation, the dev notes seem like a better place,
   because it also affects other places, such as depends. C.f. commit
   407062f2ac93624f350e9e8a4f641c882a2aaf2f

   fa2e1b85dd
8. maflcko force-pushed on Jan 26, 2026
9. DrahtBot added the label CI failed on Jan 26, 2026
10. DrahtBot removed the label CI failed on Jan 26, 2026
11. 
    l0rinc commented at 6:53 pm on January 26, 2026: contributor

    ACK fa2e1b85dd6b263a77294566bd361d7873731045
12. DrahtBot requested review from hebasto on Jan 26, 2026
13. 
    maflcko commented at 8:57 am on January 27, 2026: member

    As a note in the future, if this is ever added back, could also try to add a workaround by changing the pwd: #21885 (comment)
14. sedited approved
15. 
    sedited commented at 5:23 pm on January 27, 2026: contributor

    ACK fa2e1b85dd6b263a77294566bd361d7873731045
16. sedited merged this on Jan 27, 2026
17. sedited closed this on Jan 27, 2026

    ---

18. maflcko deleted the branch on Jan 27, 2026
19. fanquake referenced this in commit eda6c979bd on Jan 28, 2026
20. fanquake referenced this in commit 4deda48fa4 on Jan 28, 2026
21. 
    fanquake commented at 2:33 pm on January 28, 2026: member

    Backported to 30.x in #34283.

Contributors
maflcko DrahtBot hebasto l0rinc sedited fanquake

Review Requested
hebasto

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