backport compat fix for python 3.10+ PEP 620

cherry-picked from Debian boost 1.74 package [0], adapted to the
bundled 1.75 boost included by ceph. Note that 1.75 has the fopen
compat patch already included.

[0]: 107cd01182

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

patches/0017-python3.10-pep-620.patch

@@ -0,0 +1,116 @@
+Description: Fix Python 3.10 (PEP-620) incompatibility
+Origin: upstream, https://github.com/boostorg/python/commit/500194edb7833d0627ce7a2595fec49d0aae2484
+Author: Stefan Seefeld <stefan@seefeld.name>
+Last-Update: 2020-11-13
+
+--- a/src/boost/boost/python/detail/wrap_python.hpp
++++ b/src/boost/boost/python/detail/wrap_python.hpp
+@@ -227,7 +227,11 @@
+ 
+ # define PyVarObject_HEAD_INIT(type, size) \
+         PyObject_HEAD_INIT(type) size,
++#endif
+ 
++#if PY_VERSION_HEX < 0x030900A4
++#  define Py_SET_TYPE(obj, type) ((Py_TYPE(obj) = (type)), (void)0)
++#  define Py_SET_SIZE(obj, size) ((Py_SIZE(obj) = (size)), (void)0)
+ #endif
+ 
+ 
+--- a/src/boost/boost/python/object/make_instance.hpp
++++ b/src/boost/boost/python/object/make_instance.hpp
+@@ -47,7 +47,7 @@
+               
+             // Note the position of the internally-stored Holder,
+             // for the sake of destruction
+-            Py_SIZE(instance) = offsetof(instance_t, storage);
++            Py_SET_SIZE(instance, offsetof(instance_t, storage));
+ 
+             // Release ownership of the python object
+             protect.cancel();
+--- a/src/boost/libs/python/src/object/class.cpp
++++ b/src/boost/libs/python/src/object/class.cpp
+@@ -208,7 +208,7 @@
+   {
+       if (static_data_object.tp_dict == 0)
+       {
+-          Py_TYPE(&static_data_object) = &PyType_Type;
++          Py_SET_TYPE(&static_data_object, &PyType_Type);
+           static_data_object.tp_base = &PyProperty_Type;
+           if (PyType_Ready(&static_data_object))
+               return 0;
+@@ -316,7 +316,7 @@
+   {
+       if (class_metatype_object.tp_dict == 0)
+       {
+-          Py_TYPE(&class_metatype_object) = &PyType_Type;
++          Py_SET_TYPE(&class_metatype_object, &PyType_Type);
+           class_metatype_object.tp_base = &PyType_Type;
+           if (PyType_Ready(&class_metatype_object))
+               return type_handle();
+@@ -374,12 +374,7 @@
+               // like, so we'll store the total size of the object
+               // there. A negative number indicates that the extra
+               // instance memory is not yet allocated to any holders.
+-#if PY_VERSION_HEX >= 0x02060000
+-              Py_SIZE(result) =
+-#else
+-              result->ob_size =
+-#endif
+-                  -(static_cast<int>(offsetof(instance<>,storage) + instance_size));
++              Py_SET_SIZE(result,-static_cast<int>(offsetof(instance<>,storage) + instance_size));
+           }
+           return (PyObject*)result;
+       }
+@@ -470,7 +465,7 @@
+   {
+       if (class_type_object.tp_dict == 0)
+       {
+-          Py_TYPE(&class_type_object) = incref(class_metatype().get());
++          Py_SET_TYPE(&class_type_object, incref(class_metatype().get()));
+           class_type_object.tp_base = &PyBaseObject_Type;
+           if (PyType_Ready(&class_type_object))
+               return type_handle();
+@@ -739,7 +734,7 @@
+         assert(holder_offset >= offsetof(objects::instance<>,storage));
+ 
+         // Record the fact that the storage is occupied, noting where it starts
+-        Py_SIZE(self) = holder_offset;
++        Py_SET_SIZE(self, holder_offset);
+         return (char*)self + holder_offset;
+     }
+     else
+--- a/src/boost/libs/python/src/object/enum.cpp
++++ b/src/boost/libs/python/src/object/enum.cpp
+@@ -153,7 +153,7 @@
+   {
+       if (enum_type_object.tp_dict == 0)
+       {
+-          Py_TYPE(&enum_type_object) = incref(&PyType_Type);
++          Py_SET_TYPE(&enum_type_object, incref(&PyType_Type));
+ #if PY_VERSION_HEX >= 0x03000000
+           enum_type_object.tp_base = &PyLong_Type;
+ #else
+--- a/src/boost/libs/python/src/object/function.cpp
++++ b/src/boost/libs/python/src/object/function.cpp
+@@ -107,7 +107,7 @@
+     PyObject* p = this;
+     if (Py_TYPE(&function_type) == 0)
+     {
+-        Py_TYPE(&function_type) = &PyType_Type;
++        Py_SET_TYPE(&function_type, &PyType_Type);
+         ::PyType_Ready(&function_type);
+     }
+     
+--- a/src/boost/libs/python/src/object/life_support.cpp
++++ b/src/boost/libs/python/src/object/life_support.cpp
+@@ -93,7 +93,7 @@
+     
+     if (Py_TYPE(&life_support_type) == 0)
+     {
+-        Py_TYPE(&life_support_type) = &PyType_Type;
++        Py_SET_TYPE(&life_support_type, &PyType_Type);
+         PyType_Ready(&life_support_type);
+     }
+     
+

patches/series

@@ -10,3 +10,4 @@
 0014-fix-service-ordering-avoid-Before-remote-fs-pre.targ.patch
 0015-d-control-drop-outdated-build-dependencies-and-bump-.patch
 0016-d-rules-fix-no-restart-on-upgrade.patch
+0017-python3.10-pep-620.patch