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-rw-r--r--source/l/python-PyYAML/cython3.compat.patch39
1 files changed, 39 insertions, 0 deletions
diff --git a/source/l/python-PyYAML/cython3.compat.patch b/source/l/python-PyYAML/cython3.compat.patch
new file mode 100644
index 000000000..4c924f496
--- /dev/null
+++ b/source/l/python-PyYAML/cython3.compat.patch
@@ -0,0 +1,39 @@
+From 17dc5b6cd96dcfe64fd71789c771ca9b96d260e5 Mon Sep 17 00:00:00 2001
+From: "Andrew J. Hesford" <ajh@sideband.org>
+Date: Fri, 21 Jul 2023 09:50:00 -0400
+Subject: [PATCH] Fix builds with Cython 3
+
+This is a *de minimis* fix for building with Cython 3. Recent Cython<3
+releases provided `Cython.Distutils.build_ext` as an alias to
+`Cython.Distutils.old_build_ext.old_build_ext`; Cython 3 drops this
+alias and instead uses a wholly new `Cython.Distutils.build_ext` that
+does not provide the `cython_sources` function used in `setup.py`.
+
+Explicitly importing `old_build_ext` preserves the existing behavior for
+recent Cython<3 and uses the correct behavior for Cython 3. Should the
+import fail (*e.g.*, because the version of Cython available predates
+the availability of `old_build_ext`), the import falls back to just
+`Cython.Distutils.build_ext`.
+
+Signed-off-by: Andrew J. Hesford <ajh@sideband.org>
+---
+ setup.py | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index 944e7fa2..462b1e95 100644
+--- a/setup.py
++++ b/setup.py
+@@ -82,7 +82,11 @@
+ with_cython = True
+ try:
+ from Cython.Distutils.extension import Extension as _Extension
+- from Cython.Distutils import build_ext as _build_ext
++ try:
++ from Cython.Distutils.old_build_ext import old_build_ext as _build_ext
++ except ImportError:
++ from Cython.Distutils import build_ext as _build_ext
++
+ with_cython = True
+ except ImportError:
+ if with_cython: