From 7ec0f9c9a597a54dd1f200509a2c4811c8f22181 Mon Sep 17 00:00:00 2001
From: Kai Pastor <dg0yt@darc.de>
Date: Sun, 25 Sep 2022 16:39:42 +0200
Subject: [PATCH] Fix swig-python compatibility

---
 ports/ogre/portfile.cmake             |  1 +
 ports/ogre/swig-python-polyfill.patch | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 ports/ogre/swig-python-polyfill.patch

diff --git a/ports/ogre/portfile.cmake b/ports/ogre/portfile.cmake
index 44c99063809bec..a3855afe68a226 100644
--- a/ports/ogre/portfile.cmake
+++ b/ports/ogre/portfile.cmake
@@ -15,6 +15,7 @@ vcpkg_from_github(
     PATCHES
         fix-dependencies.patch
         disable-dependency-qt.patch
+        swig-python-polyfill.patch
         fix-cmake-feature-summary.patch
 )
 
diff --git a/ports/ogre/swig-python-polyfill.patch b/ports/ogre/swig-python-polyfill.patch
new file mode 100644
index 00000000000000..31bb01b64603ba
--- /dev/null
+++ b/ports/ogre/swig-python-polyfill.patch
@@ -0,0 +1,19 @@
+diff --git a/Components/Python/CMakeLists.txt b/Components/Python/CMakeLists.txt
+index b6062c6..df955e3 100644
+--- a/Components/Python/CMakeLists.txt
++++ b/Components/Python/CMakeLists.txt
+@@ -22,7 +22,14 @@ if(OGRE_BUILD_COMPONENT_OVERLAY_IMGUI)
+     list(APPEND CMAKE_SWIG_FLAGS -DHAVE_IMGUI -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS)
+ endif()
+ 
++# cf. https://github.com/swig/swig/pull/1587
++file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/pyobject_gc_polyfill.h" CONTENT [[
++#define _PyObject_GC_UNTRACK(x) PyObject_GC_UnTrack(x)
++]])
+ macro(ogre_python_module target)
++    if(SWIG_FOUND AND SWIG_VERSION VERSION_LESS "4.0.1" AND Python3_VERSION VERSION_GREATER_EQUAL "3.8")
++        target_precompile_headers(${SWIG_MODULE_${target}_REAL_NAME} PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/pyobject_gc_polyfill.h")
++    endif()
+     set_target_properties(${SWIG_MODULE_${target}_REAL_NAME} PROPERTIES 
+                         DEBUG_POSTFIX "")
+     install(TARGETS ${SWIG_MODULE_${target}_REAL_NAME} LIBRARY DESTINATION ${PYTHON_SITE_PACKAGES})