[RFC][PATCH 12/14] rpm: Support Python freethreading

["Zoltán Böszörményi" <zboszor@gmail.com>]

Added a patch to stop using the stable CPython API (of 3.7!)
as it prevents building rpm against a Python build with
freethreading enabled.

Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com>
---
 .../files/0001-rpm-Don-t-use-stable-API.patch | 37 +++++++++++++++++++
 meta/recipes-devtools/rpm/rpm_4.20.1.bb       |  1 +
 2 files changed, 38 insertions(+)
 create mode 100644 meta/recipes-devtools/rpm/files/0001-rpm-Don-t-use-stable-API.patch

diff --git a/meta/recipes-devtools/rpm/files/0001-rpm-Don-t-use-stable-API.patch b/meta/recipes-devtools/rpm/files/0001-rpm-Don-t-use-stable-API.patch
new file mode 100644
index 0000000000..3d82fdab3f
--- /dev/null
+++ b/meta/recipes-devtools/rpm/files/0001-rpm-Don-t-use-stable-API.patch
@@ -0,0 +1,37 @@
+From 2fb202730b49538bbe6d1439d419c18a89eb4c91 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Zolt=C3=A1n=20B=C3=B6sz=C3=B6rm=C3=A9nyi?=
+ <zboszor@gmail.com>
+Date: Wed, 25 Mar 2026 08:20:13 +0100
+Subject: [PATCH] rpm: Don't use stable API
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+With Python freethreading enabled, these explicit errors are
+triggered in the Python headers:
+
+  #error "The limited API is not currently supported in the free-threaded build"
+
+Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com>
+Upstream-Status: Inappropriate [python freethreading specific]
+---
+ python/CMakeLists.txt | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
+index acc003ad6..3f21205c8 100644
+--- a/python/CMakeLists.txt
++++ b/python/CMakeLists.txt
+@@ -18,9 +18,6 @@ Python3_add_library(_rpm
+ 	spec-py.c spec-py.h
+ )
+ 
+-# Select Python stable ABI
+-target_compile_definitions(_rpm PRIVATE Py_LIMITED_API=0x03070000)
+-
+ target_link_libraries(_rpm PRIVATE librpmio librpm librpmbuild librpmsign)
+ 
+ install(TARGETS _rpm
+-- 
+2.53.0
+
diff --git a/meta/recipes-devtools/rpm/rpm_4.20.1.bb b/meta/recipes-devtools/rpm/rpm_4.20.1.bb
index ba967ec1fa..05be3933e0 100644
--- a/meta/recipes-devtools/rpm/rpm_4.20.1.bb
+++ b/meta/recipes-devtools/rpm/rpm_4.20.1.bb
@@ -39,6 +39,7 @@ SRC_URI = "git://github.com/rpm-software-management/rpm;branch=rpm-4.20.x;protoc
            file://0002-rpmio-rpmglob.c-avoid-using-GLOB_BRACE-if-undefined-.patch \
            file://0001-CMakeLists.txt-set-libdir-to-CMAKE_INSTALL_FULL_LIBD.patch \
            file://0001-CMakeLists.txt-Fix-checking-for-CFLAGS.patch \
+           file://0001-rpm-Don-t-use-stable-API.patch \
            "
 
 PE = "1"
-- 
2.53.0