[meta-selinux][PATCH] libselinux-python: fix the build against swig 4.5.0

swig 4.5.0 removed the Python 2 C API compatibility macros from its
pyhead.swg runtime header, and libselinux 3.10 still calls
PyString_FromString() from selinuxswig_python.i, so the generated
wrapper no longer compiles:

  selinuxswig_python_wrap.c:11583:34: error: passing argument 3 of
  'PyList_SetItem' makes pointer from integer without a cast

Backport the upstream fix, which switches the three call sites to
PyUnicode_FromString().

Signed-off-by: Ricardo Salveti <[email protected]>
---
 .../selinux/libselinux-python_3.10.bb         |  1 +
 ...e-PyString_FromString-with-PyUnicode.patch | 52 +++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 recipes-security/selinux/libselinux/0004-libselinux-Replace-PyString_FromString-with-PyUnicode.patch

diff --git a/recipes-security/selinux/libselinux-python_3.10.bb b/recipes-security/selinux/libselinux-python_3.10.bb
index 139e6df..e0fcb4b 100644
--- a/recipes-security/selinux/libselinux-python_3.10.bb
+++ b/recipes-security/selinux/libselinux-python_3.10.bb
@@ -15,6 +15,7 @@ SRC_URI += "\
         file://0001-Makefile-fix-python-modules-install-path-for-multili.patch;patchdir=.. \
         file://0002-Do-not-use-PYCEXT-and-rely-on-the-installed-file-nam.patch;patchdir=.. \
         file://0003-libselinux-restore-drop-the-obsolete-LSF-transitiona.patch;patchdir=.. \
+        file://0004-libselinux-Replace-PyString_FromString-with-PyUnicode.patch;patchdir=.. \
         "
 
 S = "${UNPACKDIR}/${BP}/libselinux"
diff --git a/recipes-security/selinux/libselinux/0004-libselinux-Replace-PyString_FromString-with-PyUnicode.patch b/recipes-security/selinux/libselinux/0004-libselinux-Replace-PyString_FromString-with-PyUnicode.patch
new file mode 100644
index 0000000..0ec2fea
--- /dev/null
+++ b/recipes-security/selinux/libselinux/0004-libselinux-Replace-PyString_FromString-with-PyUnicode.patch
@@ -0,0 +1,52 @@
+From fb518ff492cd6a286f35b415cbd7fd0f6e3faedb Mon Sep 17 00:00:00 2001
+From: Petr Lautrbach <[email protected]>
+Date: Thu, 6 Aug 2026 16:30:44 +0200
+Subject: [PATCH] libselinux: Replace PyString_FromString with
+ PyUnicode_FromString for SWIG 4.5.0 compatibility
+
+SWIG 4.5.0 removed Python 2 C API compatibility macros (PyInt_*,
+PyString_*, SWIG_Python_str_*) from its runtime header pyhead.swg.
+These macros previously mapped deprecated Python 2 C API names to their
+Python 3 equivalents.
+
+Fixes: https://github.com/SELinuxProject/selinux/issues/538
+Authored-by: Jitka Plesníková <[email protected]>
+Upstream-Status: Backport [https://github.com/SELinuxProject/selinux/commit/fb518ff492cd6a286f35b415cbd7fd0f6e3faedb]
+
+Signed-off-by: Petr Lautrbach <[email protected]>
+Acked-by: Stephen Smalley <[email protected]>
+---
+ libselinux/src/selinuxswig_python.i | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/libselinux/src/selinuxswig_python.i b/libselinux/src/selinuxswig_python.i
+index c8c08a407..74d923e42 100644
+--- a/libselinux/src/selinuxswig_python.i
++++ b/libselinux/src/selinuxswig_python.i
+@@ -69,7 +69,7 @@ def install(src, dest):
+ 	PyObject* list = PyList_New(*$2);
+ 	int i;
+ 	for (i = 0; i < *$2; i++) {
+-		PyList_SetItem(list, i, PyString_FromString((*$1)[i]));
++		PyList_SetItem(list, i, PyUnicode_FromString((*$1)[i]));
+ 	}
+ 	$result = SWIG_AppendOutput($result, list);
+ }
+@@ -123,7 +123,7 @@ def install(src, dest):
+ 			len++;
+ 		plist = PyList_New(len);
+ 		for (i = 0; i < len; i++) {
+-			PyList_SetItem(plist, i, PyString_FromString((*$1)[i]));
++			PyList_SetItem(plist, i, PyUnicode_FromString((*$1)[i]));
+ 		}
+ 	} else {
+ 		plist = PyList_New(0);
+@@ -140,7 +140,7 @@ def install(src, dest):
+ 	if (*$1) {
+ 		plist = PyList_New(result);
+ 		for (i = 0; i < result; i++) {
+-			PyList_SetItem(plist, i, PyString_FromString((*$1)[i]));
++			PyList_SetItem(plist, i, PyUnicode_FromString((*$1)[i]));
+ 		}
+ 	} else {
+ 		plist = PyList_New(0);
-- 
2.43.0