Re: [OE-core] [PATCH v3 3/4] u-boot-tools: fix pylibfdt build with swig 4.5.0

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Tue Aug 11, 2026 at 1:11 PM CEST, Jaipaul Cheernam wrote:
> SWIG 4.5.0 removed Python 2 compatibility macros (PyInt_*, PyString_*)
> from its runtime. Backport the dtc upstream fix to u-boot's bundled
> pylibfdt/libfdt.i to replace them with Python 3 equivalents.
>
> Signed-off-by: Jaipaul Cheernam <jaipaul.cheernam@est.tech>
> ---

Hi Jaipaul,

Thanks for your patch.

Can you confirm this is based on today master? The u-boot patch fails to
apply on my side:

ERROR: u-boot-tools-1_2026.07-r0 do_patch: Applying patch '/srv/pokybuild/yocto-worker/musl-qemux86-64/build/layers/openembedded-core/meta/recipes-bsp/u-boot/files/0001-pylibfdt-Replace-removed-SWIG-Python-2-compatibility.patch' on target directory '/srv/pokybuild/yocto-worker/musl-qemux86-64/build/build/tmp/work/x86-64-v3-poky-linux-musl/u-boot-tools/2026.07/sources/u-boot-tools-2026.07'
CmdError('quilt --quiltrc /srv/pokybuild/yocto-worker/musl-qemux86-64/build/build/tmp/work/x86-64-v3-poky-linux-musl/u-boot-tools/2026.07/recipe-sysroot-native/etc/quiltrc push', 1, "stdout: Applying patch 0001-pylibfdt-Replace-removed-SWIG-Python-2-compatibility.patch
can't find file to patch at input line 33
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|From 32378d7b4383a79d13da9005035600d8f0c8c29d Mon Sep 17 00:00:00 2001
|From: Jitka Plesnikova <jplesnik@redhat.com>
|Date: Tue, 29 Jul 2026 05:55:56 +0000
|Subject: [PATCH] pylibfdt: Replace removed SWIG Python 2 compatibility macros
|
|SWIG 4.5.0 removed Python 2 compatibility macros (PyInt_*, PyString_*)
|from its runtime header pyhead.swg (see commit 79f7a2b7cb7d). Replace
|them with their Python 3 C API equivalents:
|
|- PyString_FromString -> PyUnicode_FromString
|- PyString_AsString -> PyBytes_AsString
|- PyInt_AsLong -> PyLong_AsLong
|
|The replacements are safe since the macros were already aliased to
|these exact functions in SWIG's Python 3 code path.
|
|Signed-off-by: Jitka Plesnikova <jplesnik@redhat.com>
|Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
|Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
|(cherry picked from commit 5008d1d6a356b8d0a78060da2e1021507d529cff)
|
|Upstream-Status: Backport [https://github.com/dgibson/dtc/commit/5008d1d6a356b8d0a78060da2e1021507d529cff]
|
|Signed-off-by: Jaipaul Cheernam <jaipaul.cheernam@est.tech>
|---
| scripts/dtc/pylibfdt/libfdt.i | 6 +++---
| 1 file changed, 3 insertions(+), 3 deletions(-)
|
|diff --git a/scripts/dtc/pylibfdt/libfdt.i b/scripts/dtc/pylibfdt/libfdt.i
|index 1f9c0471..b1cb9873 100644
|--- a/scripts/dtc/pylibfdt/libfdt.i
|+++ b/scripts/dtc/pylibfdt/libfdt.i
--------------------------
No file to patch.  Skipping patch.
2 out of 2 hunks ignored
Patch 0001-pylibfdt-Replace-removed-SWIG-Python-2-compatibility.patch does not apply (enforce with -f)

https://autobuilder.yoctoproject.org/valkyrie/#/builders/17/builds/4216
https://autobuilder.yoctoproject.org/valkyrie/#/builders/3/builds/4423

Thanks,
Mathieu

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