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Fri, 24 Apr 2026 03:56:24 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/235834 While python3 module use cython to build library, the generated source file _cyutility.c is not stable at each build and made the generated library not be reproducible This commit replace un-predictable tmpfolder string with fixed symlink in generated source file to assure the generated library should be reproducible. Signed-off-by: Zhixiong Chi --- ...link-to-the-unpredictable-tmpdir-for.patch | 65 +++++++++++++++++++ .../python/python3-cython_3.2.4.bb | 1 + 2 files changed, 66 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-cython/0001-Create-fixed-symlink-to-the-unpredictable-tmpdir-for.patch diff --git a/meta/recipes-devtools/python/python3-cython/0001-Create-fixed-symlink-to-the-unpredictable-tmpdir-for.patch b/meta/recipes-devtools/python/python3-cython/0001-Create-fixed-symlink-to-the-unpredictable-tmpdir-for.patch new file mode 100644 index 0000000000..005ee4224c --- /dev/null +++ b/meta/recipes-devtools/python/python3-cython/0001-Create-fixed-symlink-to-the-unpredictable-tmpdir-for.patch @@ -0,0 +1,65 @@ +From 42bb8d553defb250cd3ccdd539ff5a9c14a8421a Mon Sep 17 00:00:00 2001 +From: Zhixiong Chi +Date: Thu, 23 Apr 2026 00:19:59 -0700 +Subject: [PATCH] Create fixed symlink to the unpredictable tmpdir for + sharedmodule + +When the option "--generated-shared" is used to generated __cyutility as the +link https://github.com/scikit-learn/scikit-learn/pull/31151/files, the path +for filename_table in the generated pyx/c file contains tmp dir which is not +predictable, and it caused the generated output file is not stable at each +build and made the generated library is not reproducible [1] between builds. + +example as python3_pandas: + +vim build/_cyutility.c +...... +/* #### Code section: filename_table ### */ + +static const char* const __pyx_f[] = { + "../../../../../../../../../../../../tmp/tmpXXXXXX/_cyutility.pyx", + "", +}; + +Replace with the fixed tmp symlink, it is no harm to tweak comments in source +file, after applied this commit, vim build/_cyutility.c +...... +/* #### Code section: filename_table ### */ + +static const char* const __pyx_f[] = { + "../../../../../../../../../../../../tmp/cython_shared/_cyutility.pyx", + "", +}; + +[1] https://reproducible-builds.org/ + +Upstream-Status: Submitted [https://github.com/cython/cython/pull/7634] +Signed-off-by: Zhixiong Chi +--- + Cython/Build/SharedModule.py | 9 +++++++-- + 1 file changed, 7 insertions(+), 2 deletions(-) + +diff --git a/Cython/Build/SharedModule.py b/Cython/Build/SharedModule.py +index b466e57ed..f99fdabb6 100644 +--- a/Cython/Build/SharedModule.py ++++ b/Cython/Build/SharedModule.py +@@ -76,9 +76,14 @@ def generate_shared_module(options): + context = Main.Context.from_options(options) + scope = Symtab.ModuleScope('MemoryView', parent_module = None, context = context, is_package=False) + ++ fixed_tmp_link = "/tmp/cython_shared" ++ + with tempfile.TemporaryDirectory() as tmpdirname: +- pyx_file = os.path.join(tmpdirname, f'{module_name}.pyx') +- c_file = os.path.join(tmpdirname, f'{module_name}.c') ++ if os.path.exists(fixed_tmp_link) or os.path.islink(fixed_tmp_link): ++ os.unlink(fixed_tmp_link) ++ os.symlink(tmpdirname, fixed_tmp_link) ++ pyx_file = os.path.join(fixed_tmp_link, f'{module_name}.pyx') ++ c_file = os.path.join(fixed_tmp_link, f'{module_name}.c') + with open(pyx_file, 'w'): + pass + source_desc = FileSourceDescriptor(pyx_file) +-- +2.49.0 + diff --git a/meta/recipes-devtools/python/python3-cython_3.2.4.bb b/meta/recipes-devtools/python/python3-cython_3.2.4.bb index 3e889857e1..4c2c8e848c 100644 --- a/meta/recipes-devtools/python/python3-cython_3.2.4.bb +++ b/meta/recipes-devtools/python/python3-cython_3.2.4.bb @@ -13,6 +13,7 @@ inherit pypi setuptools3 cython SRC_URI += " \ file://0001-Replace-not-predictable-build-path-prefix-with-hardc.patch \ + file://0001-Create-fixed-symlink-to-the-unpredictable-tmpdir-for.patch \ " # No need to depend on self