GNU bug report logs - #77947
[PATCH] gnu: python@3.11: Support cross-compilation.

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From: Ludovic Courtès <ludo <at> gnu.org>
To: 77947 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>, Lars-Dominik Braun <lars <at> 6xq.net>, Munyoki Kilyungi <me <at> bonfacemunyoki.com>, Sharlatan Hellseher <sharlatanus <at> gmail.com>, Tanguy Le Carrour <tanguy <at> bioneland.org>
Subject: [bug#77947] [PATCH] gnu: python <at> 3.11: Support cross-compilation.
Date: Sun, 20 Apr 2025 23:33:49 +0200

* gnu/packages/python.scm (python-3.11)[arguments]: Pass
‘--with-build-python’ when cross-compiling.

Change-Id: Ibb210cc599ff06c5da7e73f706488488c84f5cba
---
 gnu/packages/python.scm | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

Hello Python team,

This fixes cross-compilation of python <at> 3.11, adding the ‘--with-build-python’
flag, which apparently wasn’t needed for 3.10.

I found this while attempting to build a childhurd as part of my system
config.

Thoughts?

Ludo’.

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index ebc9712294..0f2b0891aa 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013 Nikita Karetnikov <nikita <at> karetnikov.org>
-;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2021, 2023 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2013-2018, 2021, 2023, 2025 Ludovic Courtès <ludo <at> gnu.org>
 ;;; Copyright © 2013, 2014, 2015, 2016 Andreas Enge <andreas <at> enge.fr>
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw <at> netris.org>
 ;;; Copyright © 2014, 2017, 2019 Eric Bavier <bavier <at> member.fsf.org>
@@ -728,9 +728,12 @@ (define-public python-3.11
               ;; Disable runtime check failing if cross-compiling, see:
               ;; https://lists.yoctoproject.org/pipermail/poky/2013-June/008997.html
               #$@(if (%current-target-system)
-                     '("ac_cv_buggy_getaddrinfo=no"
-                       "ac_cv_file__dev_ptmx=no"
-                       "ac_cv_file__dev_ptc=no")
+                     #~("ac_cv_buggy_getaddrinfo=no"
+                        "ac_cv_file__dev_ptmx=no"
+                        "ac_cv_file__dev_ptc=no"
+                        (string-append "--with-build-python="
+                                       #+(this-package-native-input "python")
+                                       "/bin/python3"))
                      '())
               ;; -fno-semantic-interposition reinstates some
               ;; optimizations by gcc leading to around 15% speedup.

base-commit: ba53ff9cc403c7f0388e2dc932cb46e665e81be7
-- 
2.49.0

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