From 584169eb8533890ea8327dd07ca1a236b44aed2e Mon Sep 17 00:00:00 2001
From: janezd <janez.demsar@fri.uni-lj.si>
Date: Thu, 20 Jul 2023 18:11:06 +0200
Subject: [PATCH 1/4] Change setup.py for Cython 3.0

---
 setup.py | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/setup.py b/setup.py
index 86fafe34c99..ac3ed976215 100755
--- a/setup.py
+++ b/setup.py
@@ -30,6 +30,7 @@
 
 try:
     from Cython.Distutils.build_ext import new_build_ext as build_ext
+    from Cython.Build import cythonize
     have_cython = True
 except ImportError:
     have_cython = False
@@ -434,14 +435,7 @@ def ext_modules():
     if os.name == 'posix':
         libraries.append("m")
 
-    return [
-        # Cython extensions. Will be automatically cythonized.
-        Extension(
-            "*",
-            ["Orange/*/*.pyx"],
-            include_dirs=includes,
-            libraries=libraries,
-        ),
+    modules = [
         Extension(
             "Orange.classification._simple_tree",
             sources=[
@@ -464,6 +458,16 @@ def ext_modules():
         ),
     ]
 
+    if have_cython:
+        modules += cythonize(Extension(
+            "*",
+            ["Orange/*/*.pyx"],
+            include_dirs=includes,
+            libraries=libraries,
+        ))
+
+    return modules
+
 
 def setup_package():
     write_version_py()

From 3cd6be598afbe8a2160e80d831e243e39b1fec3d Mon Sep 17 00:00:00 2001
From: Marko Toplak <marko.toplak@gmail.com>
Date: Fri, 21 Jul 2023 11:21:38 +0200
Subject: [PATCH 2/4] Require cython3

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index e17f44c6b43..822b2f1700e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
     "setuptools>=41.0.0,<50.0",
     "wheel",
-    "cython<3.0",
+    "cython>=3.0",
     "oldest-supported-numpy",
     "sphinx",
     "recommonmark",

From 83129bfe40bc6219e4566141d2942f13793e3c49 Mon Sep 17 00:00:00 2001
From: Marko Toplak <marko.toplak@gmail.com>
Date: Fri, 21 Jul 2023 12:05:13 +0200
Subject: [PATCH 3/4] do not use build_ext from cython

---
 setup.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/setup.py b/setup.py
index ac3ed976215..eb4c0f02a2e 100755
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,6 @@
     have_sphinx = False
 
 try:
-    from Cython.Distutils.build_ext import new_build_ext as build_ext
     from Cython.Build import cythonize
     have_cython = True
 except ImportError:
@@ -484,7 +483,6 @@ def setup_package():
     }
     if have_numpy and have_cython:
         extra_args = {}
-        cmdclass["build_ext"] = build_ext
     else:
         # substitute a build_ext command with one that raises an error when
         # building. In order to fully support `pip install` we need to

From c6b6d4e52a0876fa72bc65e0749a55d6f3adde6e Mon Sep 17 00:00:00 2001
From: janezd <janez.demsar@fri.uni-lj.si>
Date: Sat, 22 Jul 2023 10:54:44 +0200
Subject: [PATCH 4/4] setup.py: Simplify

---
 setup.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/setup.py b/setup.py
index eb4c0f02a2e..0c817fae202 100755
--- a/setup.py
+++ b/setup.py
@@ -481,16 +481,14 @@ def setup_package():
         # numpy.distutils insist all data files are installed in site-packages
         'install_data': install_data.install_data
     }
-    if have_numpy and have_cython:
-        extra_args = {}
-    else:
+    if not (have_numpy and have_cython):
         # substitute a build_ext command with one that raises an error when
         # building. In order to fully support `pip install` we need to
         # survive a `./setup egg_info` without numpy so pip can properly
         # query our install dependencies
-        extra_args = {}
         cmdclass["build_ext"] = build_ext_error
 
+    extra_args = {}
     setup(
         name=NAME,
         version=FULLVERSION,