patch 8.2.2995: linker errors with dynamic Python 3.10

Problem:    Linker errors with dynamic Python 3.10.
Solution:   Add a couple of library entries. (Zdenek Dohnal, closes #8381,
            closes #8356)

Author: zdohnal

src/if_python3.c

@@ -184,6 +184,9 @@ typedef PySliceObject PySliceObject_T;
 # ifndef PyMapping_Keys
 #  define PyMapping_Keys py3_PyMapping_Keys
 # endif
+# if PY_VERSION_HEX >= 0x030a00b2
+#  define PyIter_Check py3_PyIter_Check
+# endif
 # define PyIter_Next py3_PyIter_Next
 # define PyObject_GetIter py3_PyObject_GetIter
 # define PyObject_Repr py3_PyObject_Repr
@@ -358,6 +361,9 @@ static PyObject* (*py3_PyDict_GetItemString)(PyObject *, const char *);
 static int (*py3_PyDict_Next)(PyObject *, Py_ssize_t *, PyObject **, PyObject **);
 static PyObject* (*py3_PyLong_FromLong)(long);
 static PyObject* (*py3_PyDict_New)(void);
+# if PY_VERSION_HEX >= 0x030a00b2
+static int (*py3_PyIter_Check)(PyObject *o);
+# endif
 static PyObject* (*py3_PyIter_Next)(PyObject *);
 static PyObject* (*py3_PyObject_GetIter)(PyObject *);
 static PyObject* (*py3_PyObject_Repr)(PyObject *);
@@ -538,6 +544,9 @@ static struct
     {"PyDict_Next", (PYTHON_PROC*)&py3_PyDict_Next},
     {"PyMapping_Check", (PYTHON_PROC*)&py3_PyMapping_Check},
     {"PyMapping_Keys", (PYTHON_PROC*)&py3_PyMapping_Keys},
+# if PY_VERSION_HEX >= 0x030a00b2
+    {"PyIter_Check", (PYTHON_PROC*)&py3_PyIter_Check},
+# endif
     {"PyIter_Next", (PYTHON_PROC*)&py3_PyIter_Next},
     {"PyObject_GetIter", (PYTHON_PROC*)&py3_PyObject_GetIter},
     {"PyObject_Repr", (PYTHON_PROC*)&py3_PyObject_Repr},
@@ -671,6 +680,15 @@ py3_PyType_HasFeature(PyTypeObject *type, unsigned long feature)
 #  define PyType_HasFeature(t,f) py3_PyType_HasFeature(t,f)
 # endif
 
+# if PY_VERSION_HEX >= 0x030a00b2
+    static inline int
+py3__PyObject_TypeCheck(PyObject *ob, PyTypeObject *type)
+{
+    return Py_IS_TYPE(ob, type) || PyType_IsSubtype(Py_TYPE(ob), type);
+}
+#  define _PyObject_TypeCheck(o,t) py3__PyObject_TypeCheck(o,t)
+# endif
+
 # ifdef MSWIN
 /*
  * Look up the library "libname" using the InstallPath registry key.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2995,
 /**/
     2994,
 /**/