obs-scripting: Switch swig to stable ABI usage

deps/obs-scripting/CMakeLists.txt

@@ -125,8 +125,10 @@ if(TARGET Python::Python)
     OUTPUT swig/swigpyrun.h
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     PRE_BUILD
-    COMMAND ${CMAKE_COMMAND} -E env "SWIG_LIB=${SWIG_DIR}" ${SWIG_EXECUTABLE}
-            -python -external-runtime swig/swigpyrun.h
+    COMMAND
+      ${CMAKE_COMMAND} -E env "SWIG_LIB=${SWIG_DIR}" ${SWIG_EXECUTABLE} -python
+      $<IF:$<BOOL:${OS_LINUX}>,-py3,-py3-stable-abi> -external-runtime
+      swig/swigpyrun.h
     COMMENT "obs-scripting - generating Python 3 SWIG interface headers")
 
   set_source_files_properties(swig/swigpyrun.h PROPERTIES GENERATED ON)

deps/obs-scripting/obspython/CMakeLists.txt

@@ -21,7 +21,9 @@ endif()
 include(UseSWIG)
 
 set_source_files_properties(
-  obspython.i PROPERTIES USE_TARGET_INCLUDE_DIRECTORIES TRUE SWIG_FLAGS "-py3")
+  obspython.i
+  PROPERTIES USE_TARGET_INCLUDE_DIRECTORIES TRUE
+             SWIG_FLAGS "$<IF:$<BOOL:${OS_LINUX}>,-py3,-py3-stable-abi>")
 
 swig_add_library(
   obspython