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support/testing: TestZfsUclibc: use internal backend for uClibc-ng toolchain

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As reported on the mailing list [1] while investigating the
TestZfsUclibc Gitlab-CI failure, the python 3.13 interpreter itsef
segfault at runtime:

  Fatal Python error: _PyThreadState_Attach: non-NULL old thread state
  Python runtime state: preinitialized
  Thread 0xSegmentation fault

This issue is related to the python 3.13 version bump [2] were several
internal changes were added [3] to support PEP 703 [4].
PEP 793 is about CPython’s global interpreter lock (“GIL”) removal
for multi-threads support that requires a working C11 "thread_local"
for thread-local storage [5].

The new uclibc-ng 1.0.55 release contains a fix for this issue [6].
This version is included in Buildroot commit [7].

Since the prebuilt Bootling aarch64 uclibc stable 2025.08-1 is based
on previous uClibc-ng release (1.0.54) we have to use the internal
toolchain backend to build a new uClibc-ng toolchain using uclibc-ng
1.0.55. Note: the toolchain config defined in this commit reflects
the options enabled in the Bootling aarch64 uclibc external
toolchains.

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/11271124859 (TestZfsUclibc)

[1] https://lore.kernel.org/buildroot/7a4d245d-1556-43c9-8997-6b1f791afbfe@gmail.com/ (TestZfsUclibc)
[2] d63e207eb8
[3] 6e97a9647a
[4] https://peps.python.org/pep-0703/
[5] https://gcc.gnu.org/onlinedocs/gcc-15.1.0/gcc/Thread-Local.html
[6] 94c1297d52
[7] 5250bba8e5

Cc: José Luis Salvador Rufo <salvador.joseluis@gmail.com>
Tested-by: José Luis Salvador Rufo <salvador.joseluis@gmail.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
[Julien:
 - add link to buildroot commit updating uclibc-ng to 1.0.55
 - add a note in the commit log about the toolchain config
]
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Romain Naour
2025-09-20 17:58:03 +02:00
committed by Julien Olivain
parent 5d2abdc66c
commit 5208b7a1bd
1 changed files with 11 additions and 2 deletions
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13
support/testing/tests/package/test_zfs.py
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@@ -74,9 +74,18 @@ class TestZfsGlibc(TestZfsBase):
class TestZfsUclibc(TestZfsBase):
config = TestZfsBase.config + \
# The Bootling aarch64 uclibc stable 2025.08-1 needs to be
# rebuild with uClibc-ng 1.0.55.
# See: https://github.com/wbx-github/uclibc-ng/commit/94c1297d52263e20cd9715601afa37f49d008d93
config = TestZfsBase.config.replace('BR2_TOOLCHAIN_EXTERNAL=y\n', '')
config = config.replace('BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y\n', '') + \
"""
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_UCLIBC_STABLE=y
BR2_TOOLCHAIN_BUILDROOT_UCLIBC=y
BR2_KERNEL_HEADERS_5_4=y
BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
BR2_PTHREAD_DEBUG=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_GCC_ENABLE_OPENMP=y
"""
def test_run(self):