2 files changed, 76 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch b/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch
new file mode 100644
index 0000000000..1fbbd8fd48
--- /dev/null
+++ b/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch
@@ -0,0 +1,72 @@
+From 1690c505f1387e1884565021991a162e2f88f2b9 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Wed, 17 Sep 2025 01:42:08 -0700
+Subject: [PATCH] Replace not predictable build path prefix with hardcode
+ string in the generated output file
+
+The build path may contain tmp dir which is not predictable, it caused
+the generated output file is not stable at each build and made
+the generated library is not reproducible [1] between builds
+
+vim frozenlist/_frozenlist.cpp
+...
+/* BEGIN: Cython Metadata
+{
+    "distutils": {
+        "depends": [],
+        "language": "c++",
+        "name": "frozenlist._frozenlist",
+        "sources": [
+            "/tmp/.tmp-frozenlist-pep517-cfdvygni/src/frozenlist/_frozenlist.pyx"
+        ]
+    },
+    "module_name": "frozenlist._frozenlist"
+}
+END: Cython Metadata */
+...
+
+Replace build path prefix with hardcode `build_path', it is no harm to
+tweak comments in source file, after applied this commit,
+vim frozenlist/_frozenlist.cpp
+...
+/* BEGIN: Cython Metadata
+{
+    "distutils": {
+        "depends": [],
+        "language": "c++",
+        "name": "frozenlist._frozenlist",
+        "sources": [
+            "build_path/frozenlist/_frozenlist.pyx"
+        ]
+    },
+    "module_name": "frozenlist._frozenlist"
+}
+END: Cython Metadata */
+...
+
+[1] https://reproducible-builds.org/
+
+Upstream-Status: Submitted [https://github.com/cython/cython/pull/7162]
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ Cython/Compiler/ModuleNode.py | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/Cython/Compiler/ModuleNode.py b/Cython/Compiler/ModuleNode.py
+index 6672cb986..b1123515e 100644
+--- a/Cython/Compiler/ModuleNode.py
++++ b/Cython/Compiler/ModuleNode.py
+@@ -779,7 +779,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
+         code.put_generated_by()
+         if metadata:
+             code.putln("/* BEGIN: Cython Metadata")
+-            code.putln(json.dumps(metadata, indent=4, sort_keys=True))
++            _metadata = json.dumps(metadata, indent=4, sort_keys=True)
++            _metadata = _metadata.replace(os.getcwd(), 'build_path')
++            code.putln(_metadata)
+             code.putln("END: Cython Metadata */")
+             code.putln("")
+ 
+-- 
+2.49.0
+
diff --git a/meta/recipes-devtools/python/python3-cython_3.1.3.bb b/meta/recipes-devtools/python/python3-cython_3.1.3.bb
index dcb61a3634..3b2835d9c5 100644
--- a/meta/recipes-devtools/python/python3-cython_3.1.3.bb
+++ b/meta/recipes-devtools/python/python3-cython_3.1.3.bb
@@ -11,6 +11,10 @@ SRC_URI[sha256sum] = "10ee785e42328924b78f75a74f66a813cb956b4a9bc91c44816d089d59
 
 inherit pypi setuptools3 cython
 
+SRC_URI += " \
+    file://0001-Replace-not-predictable-build-path-prefix-with-hardc.patch \
+"
+
 # No need to depend on self
 DEPENDS:remove = "python3-cython-native"