guix: Use UCRT runtime for Windows release binaries #33593

pull hebasto wants to merge 4 commits into bitcoin:master from hebasto:251009-guix-ucrt changing 9 files +57 −78
  1. hebasto commented at 9:46 pm on October 9, 2025: member

    This PR:

    1. Switches Windows release binaries to UCRT.
    2. Update docs.
    3. Drops MSVCRT workarounds.

    Closes #30210.

  2. hebasto added the label Build system on Oct 9, 2025
  3. DrahtBot commented at 9:46 pm on October 9, 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/33593.

    Reviews

    See the guideline for information on the review process.

    Type Reviewers
    Concept ACK laanwj
    Stale ACK trevarj

    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:

    • #33902 (doc: Document compiler configuration for native depends packages by willcl-ark)
    • #33775 (guix: use GCC 14.3.0 over 13.3.0 by fanquake)
    • #32162 (depends: Switch from multilib to platform-specific toolchains by hebasto)
    • #25573 (guix: produce a -static-pie bitcoind by fanquake)

    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.

  4. in contrib/guix/manifest.scm:128 in f380e62510 
    122@@ -123,6 +123,104 @@ desirable for building Bitcoin Core release binaries."
123   (package-with-extra-patches mingw-w64-x86_64-winpthreads
124     (search-our-patches "winpthreads-remap-guix-store.patch")))
125 
126+
127+;; While mingw-w64 is packaged in Guix, we maintain our own package,
128+;; to use UCRT runtime.
    maflcko commented at 6:11 am on October 10, 2025:
    Is there a rationale why upstream guix does not offer ucrt?
    hebasto commented at 7:18 am on October 10, 2025:
    1. https://codeberg.org/guix/guix/src/commit/8daae75de3670594dfcb63b6ae6f1603ca6f7971/gnu/packages/mingw.scm#L88-L90:
    0                     ;; XXX: A new target to use UCRT can be introduced as
1                     ;; the MSYS2 project does, e.g: x86_64-w64-ucrt-mingw32.
2                     "--with-default-msvcrt=msvcrt")
    1. https://issues.guix.gnu.org/71630:

    I’ve added a new configure flag to set the default MSVCRT to MSVCRT as the default now is UCRT. This default is also changed by Debian, other projects like MSYS2 use a different target triplet for UCRT which is now the default and could be introduced if necessary on GNU Guix.

  5. trevarj commented at 7:42 pm on October 21, 2025: none
    I could submit an upstream Guix patch for this. It will help with build times since the package with ucrt will be in the main substitute servers.
  7. laanwj commented at 12:22 pm on October 22, 2025: member
    Concept ACK
  8. fanquake commented at 10:38 am on October 29, 2025: member
    What is the plan for adding CI, as that blocks everything here?
  9. in contrib/guix/manifest.scm:131 in f380e62510 outdated 
    122@@ -123,6 +123,104 @@ desirable for building Bitcoin Core release binaries."
123   (package-with-extra-patches mingw-w64-x86_64-winpthreads
124     (search-our-patches "winpthreads-remap-guix-store.patch")))
125 
126+
127+;; While mingw-w64 is packaged in Guix, we maintain our own package,
128+;; to use UCRT runtime.
129+(define* (make-mingw-w64/implementation machine
    fanquake commented at 12:01 pm on October 29, 2025:

    we maintain our own package

    If we are going to copy-paste this from Guix, and maintain it outself, seems like we should simplify it for our usage? i.e we know we are building winpthreads.

    hebasto commented at 1:20 pm on October 29, 2025:
    We cannot phase out the with-winpthreads? argument, as during the recursive invocation it is unset:https://github.com/bitcoin/bitcoin/blob/f380e6251021cc7aa0c47f564147abea922dc050/contrib/guix/manifest.scm#L154-L157
    trevarj commented at 1:20 pm on October 29, 2025:

    It should be possible to inherit the Guix package and then modify arguments to replace `"–with-default-msvcrt=msvcrt" with “”–with-default-msvcrt=ucrt"

     0(use-modules
 1 (guix packages)
 2 (guix gexp)
 3 (guix utils)
 4 (gnu packages mingw)
 5 (srfi srfi-1))
 6
 7(define (override-mingw base-pkg)
 8  (package
 9    (inherit base-pkg)
10    (name "mingw-ucrt") ; fix this
11    (arguments
12     (substitute-keyword-arguments (package-arguments base-pkg)
13       ((#:configure-flags flags)
14        #~(cons "--with-default-msvcrt=ucrt" (drop-right #$flags 1)))))))
15
16(define-public mingw-x86_64-ucrt (override-mingw mingw-w64-x86_64-winpthreads))
17(define-public mingw-i686-ucrt (override-mingw mingw-w64-i686-winpthreads))
    hebasto commented at 7:51 pm on October 29, 2025:

    @trevarj

    Would it work with the recursion in make-mingw-w64/implementation?

    trevarj commented at 9:28 pm on October 29, 2025:

    Would it work with the recursion in make-mingw-w64/implementation?

    Forgot about that, so no🤦🏻‍♂️. Will be much better when that PR lands. (See below)

    trevarj commented at 5:32 am on October 30, 2025:

    @hebasto This builds correctly with guix build -f [save below to tmp file]. The native-inputs override solves the issue with recursion.

     0(use-modules
 1 (guix packages)
 2 (guix gexp)
 3 (guix utils)
 4 (guix build-system gnu)
 5 (gnu packages mingw))
 6
 7(define (override-msvcrt pkg)
 8  (package
 9    (inherit pkg)
10    (name (string-append (package-name pkg) "-ucrt"))
11    (arguments
12     (substitute-keyword-arguments (package-arguments pkg)
13       ((#:configure-flags flags)
14        #~(map (lambda (flag)
15                 (if (string-prefix? "--with-default-msvcrt" flag)
16                     "--with-default-msvcrt=ucrt"
17                     flag))
18               #$flags))))))
19
20(define (make-mingw-ucrt winpthreads-pkg sans-pkg)
21  (override-msvcrt
22   (package
23     (inherit winpthreads-pkg)
24     (native-inputs
25      (modify-inputs (package-native-inputs winpthreads-pkg)
26        (replace "xlibc" (override-msvcrt sans-pkg)))))))
27
28(define-public mingw-x86_64-ucrt
29  (make-mingw-ucrt mingw-w64-x86_64-winpthreads mingw-w64-x86_64-sans-winpthreads))
30
31(define-public mingw-i686-ucrt
32  (make-mingw-ucrt mingw-w64-i686-winpthreads mingw-w64-i686-sans-winpthreads))
33
34mingw-x86_64-ucrt

    0successfully built /gnu/store/97knb394q69xs0swb9imax4zqfc8vhnb-mingw-w64-x86_64-winpthreads-ucrt-13.0.0.drv
1/gnu/store/y5w87r0sj59c7ga23r69ln4mvy4ibff9-mingw-w64-x86_64-winpthreads-ucrt-13.0.0
    hebasto commented at 11:04 pm on November 4, 2025:
    Thanks! Reworked.
  10. in contrib/guix/manifest.scm:141 in f380e62510 
    136+specified, recurse and return a mingw-w64 with support for winpthreads."
137+  (let* ((triplet (string-append machine "-" "w64-mingw32")))
138+    (package
139+      (name (string-append "mingw-w64" "-" machine
140+                           (if with-winpthreads? "-winpthreads" "")))
141+      (version "12.0.0")
    fanquake commented at 12:02 pm on October 29, 2025:
    Any reason to not use the v13.0.0 headers: https://www.mingw-w64.org/changelog/?
  11. hebasto force-pushed on Oct 29, 2025
  12. hebasto commented at 10:10 pm on October 29, 2025: member

    Rebased. Some of the feedback has been addressed.

    My Guix build:

    0x86_64
1366c53942430c0f310fc42445693e7ba1ff5dce25f2df8e42d3c4b044747f385  guix-build-4d31ddc6dfe6/output/dist-archive/bitcoin-4d31ddc6dfe6.tar.gz
21b0c2e70c8f85650a4b4238c74dd22b960b2f4036042d2f8c6b302dbc50ae3b7  guix-build-4d31ddc6dfe6/output/x86_64-w64-mingw32/SHA256SUMS.part
3ed292458da2126949ee0a35495ba59272066364d7b458b28576dcd229ed984b5  guix-build-4d31ddc6dfe6/output/x86_64-w64-mingw32/bitcoin-4d31ddc6dfe6-win64-codesigning.tar.gz
49cf21d10a8c63edd81f43360dd39b0f38c38fc7ac632b96243838c980fd8abe2  guix-build-4d31ddc6dfe6/output/x86_64-w64-mingw32/bitcoin-4d31ddc6dfe6-win64-debug.zip
57e402681080ca6e0e4c5c8c9113bc3c6f9ac2a0f878a8e253c9c8a91756cf065  guix-build-4d31ddc6dfe6/output/x86_64-w64-mingw32/bitcoin-4d31ddc6dfe6-win64-setup-unsigned.exe
6feaa36c5edf9b9e30bd2e1c3523d2f1b445cb6bf96c40a87c250c37343d8d6bd  guix-build-4d31ddc6dfe6/output/x86_64-w64-mingw32/bitcoin-4d31ddc6dfe6-win64-unsigned.zip
  13. hebasto marked this as ready for review on Oct 29, 2025
  14. hebasto added the label Windows on Oct 29, 2025
  15. fanquake changes_requested
  16. fanquake commented at 10:28 am on October 30, 2025: member
    What is the plan for adding CI, as that blocks everything here?
  17. hebasto commented at 1:41 pm on October 30, 2025: member

    What is the plan for adding CI, as that blocks everything here?

    I’m working on it. I have issues with the sqlite package that are not reproducible neither in the nightly builds nor locally.

    UPDATE. See #33764.

  18. hebasto force-pushed on Nov 4, 2025
  19. hebasto commented at 11:03 pm on November 4, 2025: member
    Reworked per feedback from @trevarj.
  20. hebasto commented at 11:22 pm on November 4, 2025: member

    My Guix build:

    0aarch64
14e80325f9cba1c286a999eeaa6fb5f06bb56ba03f118cfb6eaa86c8443318ccc  guix-build-dbb835956abf/output/dist-archive/bitcoin-dbb835956abf.tar.gz
27557b85092d69ac4f6ebeb4881a41fe808ee684b1b2f87efde97a616f1d1b213  guix-build-dbb835956abf/output/x86_64-w64-mingw32/SHA256SUMS.part
33cf561ff53f83f822fd451b2f83161908daad89598d286de916a641640abe747  guix-build-dbb835956abf/output/x86_64-w64-mingw32/bitcoin-dbb835956abf-win64-codesigning.tar.gz
4f607587780890278ffcc9c4b346bcecc9998951d99fb6d3e8a075c5f2ad76cc6  guix-build-dbb835956abf/output/x86_64-w64-mingw32/bitcoin-dbb835956abf-win64-debug.zip
5dd5c910c4a46b1fba7fe2dd3c1747c99cd23d24c832768b3d7abc2c3a3aa7598  guix-build-dbb835956abf/output/x86_64-w64-mingw32/bitcoin-dbb835956abf-win64-setup-unsigned.exe
62c9f04917c10cf52151aeac6276f94c6b3229d80ca72ee980c987282cd26a471  guix-build-dbb835956abf/output/x86_64-w64-mingw32/bitcoin-dbb835956abf-win64-unsigned.zip
  21. trevarj commented at 5:30 am on November 5, 2025: none

    @hebasto thanks for working in my suggestion!

    ACK dbb8359

  22. DrahtBot requested review from laanwj on Nov 5, 2025
  23. DrahtBot added the label Needs rebase on Nov 11, 2025
  24. hebasto force-pushed on Nov 11, 2025
  25. hebasto commented at 11:50 am on November 11, 2025: member
    Rebased to resolve a conflict with the merged bitcoin/bitcoin#33181.
  26. DrahtBot removed the label Needs rebase on Nov 11, 2025
  27. fanquake commented at 5:32 pm on November 11, 2025: member

    Guix Build (aarch64):

    0451630ecff800ab320a9d5ad8062758df9d700310690110e764c916ae4c8121e  guix-build-527acc5ee497/output/dist-archive/bitcoin-527acc5ee497.tar.gz
1bf19a3b8e9e9cf609102c38cd6c00dca4d2645f66ae3af591f29fdeceef7b6cf  guix-build-527acc5ee497/output/x86_64-w64-mingw32/SHA256SUMS.part
2b69dc956f6fd6bb9b4e20e5f4d29eb4ef74e450d250346bf0450cc051b5cfa95  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-codesigning.tar.gz
39e44c7635597430ee32fb26dff8fcd3261fe747ca66b78ed3bc1fb6c6a0efad8  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-debug.zip
48527ebfe0d7849b3182c9c2f71b6be616e3c8fd38a6f10878c2fadf165ed8764  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-setup-unsigned.exe
5ee9437a08668555adaa1cfa30d6a87b5cbdd6d20c4b7b456dd7dc99f78a0f03d  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-unsigned.zip
  28. hebasto commented at 6:02 pm on November 11, 2025: member

    My Guix build:

    0aarch64
1451630ecff800ab320a9d5ad8062758df9d700310690110e764c916ae4c8121e  guix-build-527acc5ee497/output/dist-archive/bitcoin-527acc5ee497.tar.gz
2bf19a3b8e9e9cf609102c38cd6c00dca4d2645f66ae3af591f29fdeceef7b6cf  guix-build-527acc5ee497/output/x86_64-w64-mingw32/SHA256SUMS.part
3b69dc956f6fd6bb9b4e20e5f4d29eb4ef74e450d250346bf0450cc051b5cfa95  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-codesigning.tar.gz
49e44c7635597430ee32fb26dff8fcd3261fe747ca66b78ed3bc1fb6c6a0efad8  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-debug.zip
58527ebfe0d7849b3182c9c2f71b6be616e3c8fd38a6f10878c2fadf165ed8764  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-setup-unsigned.exe
6ee9437a08668555adaa1cfa30d6a87b5cbdd6d20c4b7b456dd7dc99f78a0f03d  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-unsigned.zip

    UPDATE: Hashes on x86_64 are the same.

  29. tobtoht commented at 9:18 pm on November 11, 2025: contributor

    Guix Build:

    0x86_64
1451630ecff800ab320a9d5ad8062758df9d700310690110e764c916ae4c8121e  guix-build-527acc5ee497/output/dist-archive/bitcoin-527acc5ee497.tar.gz
2bf19a3b8e9e9cf609102c38cd6c00dca4d2645f66ae3af591f29fdeceef7b6cf  guix-build-527acc5ee497/output/x86_64-w64-mingw32/SHA256SUMS.part
3b69dc956f6fd6bb9b4e20e5f4d29eb4ef74e450d250346bf0450cc051b5cfa95  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-codesigning.tar.gz
49e44c7635597430ee32fb26dff8fcd3261fe747ca66b78ed3bc1fb6c6a0efad8  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-debug.zip
58527ebfe0d7849b3182c9c2f71b6be616e3c8fd38a6f10878c2fadf165ed8764  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-setup-unsigned.exe
6ee9437a08668555adaa1cfa30d6a87b5cbdd6d20c4b7b456dd7dc99f78a0f03d  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-unsigned.zip
  30. hebasto commented at 9:22 am on November 12, 2025: member

    Here is my Guix build on RISC-V machine:

    0riscv64
1451630ecff800ab320a9d5ad8062758df9d700310690110e764c916ae4c8121e  guix-build-527acc5ee497/output/dist-archive/bitcoin-527acc5ee497.tar.gz
2bf19a3b8e9e9cf609102c38cd6c00dca4d2645f66ae3af591f29fdeceef7b6cf  guix-build-527acc5ee497/output/x86_64-w64-mingw32/SHA256SUMS.part
3b69dc956f6fd6bb9b4e20e5f4d29eb4ef74e450d250346bf0450cc051b5cfa95  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-codesigning.tar.gz
49e44c7635597430ee32fb26dff8fcd3261fe747ca66b78ed3bc1fb6c6a0efad8  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-debug.zip
58527ebfe0d7849b3182c9c2f71b6be616e3c8fd38a6f10878c2fadf165ed8764  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-setup-unsigned.exe
6ee9437a08668555adaa1cfa30d6a87b5cbdd6d20c4b7b456dd7dc99f78a0f03d  guix-build-527acc5ee497/output/x86_64-w64-mingw32/bitcoin-527acc5ee497-win64-unsigned.zip
  31. m3dwards commented at 12:53 pm on November 18, 2025: contributor
    As I understand it, this will produce the cross-compile toolchain using GCC 13. Should we wait on this PR until we have GCC 14] (https://github.com/bitcoin/bitcoin/pull/33775) being as CI for UCRT (https://github.com/bitcoin/bitcoin/pull/33764) will be based on Trixie and GCC 14?
  32. fanquake referenced this in commit f6acbef108 on Nov 28, 2025
  33. hebasto commented at 11:40 am on November 30, 2025: member

    What is the plan for adding CI, as that blocks everything here?

    The UCRT CI job is up now.

  34. maflcko commented at 8:38 am on December 1, 2025: member

    The UCRT CI job is up now.

    You’ll have to rebase this one and adjust the ci comments in the ci config files, no?

  35. hebasto force-pushed on Dec 1, 2025
  36. hebasto commented at 9:29 am on December 1, 2025: member

    The UCRT CI job is up now.

    You’ll have to rebase this one and adjust the ci comments in the ci config files, no?

    Thanks! Done.

  37. fanquake commented at 11:12 am on December 1, 2025: member

    Shouldn’t this be removing the other CI (#33764):

    MSVCRT-related CI jobs should be removed from the CI framework once the migration to UCRT is complete.

  38. hebasto commented at 1:03 am on December 2, 2025: member

    Shouldn’t this be removing the other CI (#33764):

    MSVCRT-related CI jobs should be removed from the CI framework once the migration to UCRT is complete.

    Removed.

  39. fanquake referenced this in commit 9a29b2d331 on Dec 3, 2025
  40. hebasto force-pushed on Dec 3, 2025
  41. hebasto commented at 3:36 pm on December 3, 2025: member
    Rebased on top of the merged bitcoin/bitcoin#33857.
  42. fanquake commented at 3:45 pm on December 3, 2025: member
    Given it’s dropping the other CI, I think this PR should be completing #30210, dropping workarounds, updating any docs, and completing the migration.
  43. hebasto commented at 6:17 pm on December 4, 2025: member

    Given it’s dropping the other CI, I think this PR should be completing #30210, dropping workarounds, updating any docs, and completing the migration.

    More commits have been added to complete the migration.

  44. DrahtBot added the label Needs rebase on Dec 17, 2025
  45. guix: Use UCRT runtime for Windows release binaries 
    Co-authored-by: Trevor Arjeski <tmarjeski@gmail.com>
    8035236e68
  46. ci: Remove Windows + MSVCRT jobs for cross-compiling and native testing 5a2b4d667f
  47. doc: Update Windows build docs to reflect migration from MSVCRT to UCRT 27e0b17a90
  48. Remove MSVCRT-specific workarounds fece4625de
  49. hebasto force-pushed on Dec 21, 2025
  50. hebasto commented at 0:24 am on December 21, 2025: member
    Rebased to resolve a conflict with the merged #34080.
  51. DrahtBot removed the label Needs rebase on Dec 21, 2025
  52. hebasto commented at 10:57 am on December 21, 2025: member

    My Guix build:

     0x86_64
 1e96b2d1529bba5b3d98c05c4cb017c2c4e4b204e868a2b7f657827075dcd9a16  guix-build-fece4625de26/output/aarch64-linux-gnu/SHA256SUMS.part
 2bd9de4050712e8fb7c70b3f86110ed6a53e07fd0e89c486379d77354f78165f4  guix-build-fece4625de26/output/aarch64-linux-gnu/bitcoin-fece4625de26-aarch64-linux-gnu-debug.tar.gz
 3fca84a6885fbb660d702faa0a6b278667fa3fbc48ceecc3ee61d5de93f553bfc  guix-build-fece4625de26/output/aarch64-linux-gnu/bitcoin-fece4625de26-aarch64-linux-gnu.tar.gz
 42b18a357f5124e5c4e9544ccdf3c1ea32e1999b74c771649e7bd901f761b54e4  guix-build-fece4625de26/output/arm-linux-gnueabihf/SHA256SUMS.part
 58d022bc485e2d54504dcd7652a5be3922827de951b8632168bcb0ffba8aa783d  guix-build-fece4625de26/output/arm-linux-gnueabihf/bitcoin-fece4625de26-arm-linux-gnueabihf-debug.tar.gz
 6c7f366824e03d6832b0c5a58aac9529d318ccdc585472db74a75adcc0ac5b76c  guix-build-fece4625de26/output/arm-linux-gnueabihf/bitcoin-fece4625de26-arm-linux-gnueabihf.tar.gz
 7723c089b6df295f2190ba1237b728d0fa5f6f8434cc9958471bafb0fedf95a34  guix-build-fece4625de26/output/arm64-apple-darwin/SHA256SUMS.part
 836484e4351e951be9c1de69719ea3caa94b469322d637f41b02f1493304956cf  guix-build-fece4625de26/output/arm64-apple-darwin/bitcoin-fece4625de26-arm64-apple-darwin-codesigning.tar.gz
 95431d0a14b2e4322fdb10a61389bfd4322da86e0d1e04b2556ec46f16196d596  guix-build-fece4625de26/output/arm64-apple-darwin/bitcoin-fece4625de26-arm64-apple-darwin-unsigned.tar.gz
10fe0d6452817e9de894aa733db279a95dd0420ef5322a5d6b6690a2bac1048a28  guix-build-fece4625de26/output/arm64-apple-darwin/bitcoin-fece4625de26-arm64-apple-darwin-unsigned.zip
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