[PATCH] python3: Fix build arch reproducibility issues

[PATCH] python3: Fix build arch reproducibility issues

[Richard Purdie]

The build arch leaks into some of the installed python files. This tweaks/adds
some sed expressions to resolve those references for the target and improves
reproducibility between architectures.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
 meta/recipes-devtools/python/python3_3.14.7.bb | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/meta/recipes-devtools/python/python3_3.14.7.bb b/meta/recipes-devtools/python/python3_3.14.7.bb
index f917edebd86..93c2db55c10 100644
--- a/meta/recipes-devtools/python/python3_3.14.7.bb
+++ b/meta/recipes-devtools/python/python3_3.14.7.bb
@@ -227,6 +227,9 @@ do_install:append() {
                 -e "s,^ 'CONFINCLUDEDIR'.*, 'CONFINCLUDEDIR': '${STAGING_INCDIR}'\,,g" \
                 -e "s,^ 'INCLUDEPY'.*, 'INCLUDEPY': '${STAGING_INCDIR}/python${PYTHON_MAJMIN}'\,,g" \
                 -e "s,^ 'CONFINCLUDEPY'.*, 'CONFINCLUDEPY': '${STAGING_INCDIR}/python${PYTHON_MAJMIN}'\,,g" \
+                -e "s,^ 'BUILD_GNU_TYPE'.*, 'BUILD_GNU_TYPE': '${HOST_SYS}'\,,g" \
+                -e "s,--build=${BUILD_ARCH},--build=${HOST_ARCH},g" \
+                -e "s,build_alias=${BUILD_ARCH},build_alias=${HOST_ARCH},g" \
                 -e "s,${B},/build/path/unavailable/,g" \
                 $sysconfigfile
         cp $sysconfigfile ${D}${libdir}/python-sysconfigdata/_sysconfigdata.py
@@ -402,6 +405,9 @@ py_package_preprocess () {
                 -e 's:${RECIPE_SYSROOT_NATIVE}::g' \
                 -e 's:${RECIPE_SYSROOT}::g' \
                 -e 's:${BASE_WORKDIR}/${MULTIMACH_TARGET_SYS}::g' \
+                -e 's:BUILD_GNU_TYPE\(.*\)=\(.*\)[a-z\-]*:BUILD_GNU_TYPE\1=\2${HOST_SYS}:g' \
+                -e 's:build_alias=${BUILD_ARCH}:build_alias=${HOST_ARCH}:g' \
+                -e 's:--build=${BUILD_ARCH}:--build=${HOST_ARCH}:g' \
                 ${PKGD}/${libdir}/python${PYTHON_MAJMIN}/config-${PYTHON_MAJMIN}${PYTHON_ABI}*/Makefile \
                 ${PKGD}/${libdir}/python${PYTHON_MAJMIN}/_sysconfigdata*.py \
                 ${PKGD}/${bindir}/python${PYTHON_MAJMIN}-config
@@ -435,8 +441,13 @@ py_package_preprocess () {
                 -e 's:${RECIPE_SYSROOT_NATIVE}::g' \
                 -e 's:${RECIPE_SYSROOT}::g' \
                 -e 's:${BASE_WORKDIR}/${MULTIMACH_TARGET_SYS}::g' \
+                -e 's:build_alias=${BUILD_ARCH}:build_alias=${HOST_ARCH}:g' \
+                -e 's:--build=${BUILD_ARCH}:--build=${HOST_ARCH}:g' \
                 -e 's|"userbase": ".*"|"userbase": ""|g' \
 		${PKGD}/${libdir}/python${PYTHON_MAJMIN}/_sysconfig_vars*.json
+
+	# Fix extensions in build-details.json
+	sed -i -e 's:${BUILD_ARCH}-${BUILD_OS}:${HOST_ARCH}-${HOST_OS}:g' ${PKGD}/${libdir}/python${PYTHON_MAJMIN}/build-details.json
 }
 
 # We want bytecode precompiled .py files (.pyc's) by default

Re: [OE-core] [PATCH] python3: Fix build arch reproducibility issues

[Mathieu Dubois-Briand]

On Tue Oct 20, 2026 at 2:12 PM CEST, Richard Purdie via lists.openembedded.org wrote:
> The build arch leaks into some of the installed python files. This tweaks/adds
> some sed expressions to resolve those references for the target and improves
> reproducibility between architectures.
>
> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
> ---

Hi Richard,

It looks like this is breaking a ptest with musl:

Failed ptests:
{'python3': ['test_implementation', 'python3']}

https://autobuilder.yoctoproject.org/valkyrie/#/builders/110/builds/1405
https://autobuilder.yoctoproject.org/valkyrie/#/builders/109/builds/1416

Any clue about the issue?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com