From 49cc2f8103b45b89365ba24f7c000f47b47478ab Mon Sep 17 00:00:00 2001
From: Charlie Lin <tuug@gmx.us>
Date: Fri, 2 Jan 2026 08:19:35 -0500
Subject: [PATCH 1/3] Add definitions for PY_CXX_CONSTEXPR, PY_CXX_CONSTEVAL,
 and PY_CXX_CONSTINIT

---
 Include/pyport.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Include/pyport.h b/Include/pyport.h
index 61e2317976eed1..9b7e45b1b54a53 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -642,6 +642,30 @@ extern "C" {
 #  endif
 #endif
 
+#ifndef PY_CXX_CONSTEXPR
+#  if defined(__cplusplus) || __STDC_VERSION__ >= 202311L
+#    define PY_CXX_CONSTEXPR constexpr
+#  else
+#    define PY_CXX_CONSTEXPR
+#  endif
+#endif
+
+#ifndef PY_CXX_CONSTEVAL
+#  ifdef __cpp_consteval
+#    define PY_CXX_CONSTEVAL consteval
+#  else
+#    define PY_CXX_CONSTEVAL
+#  endif
+#endif
+
+#ifndef PY_CXX_CONSTINIT
+#  ifdef __cpp_constinit
+#    define PY_CXX_CONSTINIT constinit
+#  else
+#    define PY_CXX_CONSTINIT
+#  endif
+#endif
+
 #if defined(__sgi) && !defined(_SGI_MP_SOURCE)
 #  define _SGI_MP_SOURCE
 #endif

From 30b724751f42b020e2037d3e767083a40aa644e4 Mon Sep 17 00:00:00 2001
From: Charlie Lin <tuug@gmx.us>
Date: Fri, 2 Jan 2026 08:31:07 -0500
Subject: [PATCH 2/3] Add another definition of Py_DEPRECATED using the
 [[deprecated]] attribute

---
 Include/pyport.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Include/pyport.h b/Include/pyport.h
index 9b7e45b1b54a53..a489851e57a87d 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -282,6 +282,8 @@ extern "C" {
 #elif defined(_MSC_VER)
 #define Py_DEPRECATED(VERSION) __declspec(deprecated( \
                                           "deprecated in " #VERSION))
+#elif __STDC_VERSION__ >= 202311L || __cplusplus >= 201402L
+#define Py_DEPRECATED(VERSION) [[deprecated("Deprecated in "#VERSION)]]
 #else
 #define Py_DEPRECATED(VERSION_UNUSED)
 #endif

From 2c9e8a3f2c0e64f414206029ec5280c54ea0527d Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Fri, 2 Jan 2026 13:46:03 +0000
Subject: [PATCH 3/3] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/C_API/2026-01-02-13-46-01.gh-issue-143353.Hy-0xm.rst    | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/C_API/2026-01-02-13-46-01.gh-issue-143353.Hy-0xm.rst

diff --git a/Misc/NEWS.d/next/C_API/2026-01-02-13-46-01.gh-issue-143353.Hy-0xm.rst b/Misc/NEWS.d/next/C_API/2026-01-02-13-46-01.gh-issue-143353.Hy-0xm.rst
new file mode 100644
index 00000000000000..dc91e9f7f99e6b
--- /dev/null
+++ b/Misc/NEWS.d/next/C_API/2026-01-02-13-46-01.gh-issue-143353.Hy-0xm.rst
@@ -0,0 +1 @@
+Add macros for annotating functions with constexpr, consteval, and constinit