Allow setting descriptor docstring on PyPy>v7.3.9 (GH-4694)

Cython/Compiler/Nodes.py

@@ -3697,7 +3697,7 @@ class DefNodeWrapper(FuncDefNode):
                     docstr.as_c_string_literal()))
 
             if entry.is_special:
-                code.putln('#if CYTHON_COMPILING_IN_CPYTHON')
+                code.putln('#if CYTHON_UPDATE_DESCRIPTOR_DOC')
                 code.putln(
                     "struct wrapperbase %s;" % entry.wrapperbase_cname)
                 code.putln('#endif')
@@ -5503,7 +5503,7 @@ class CClassDefNode(ClassDefNode):
                     preprocessor_guard = slot.preprocessor_guard_code() if slot else None
                     if preprocessor_guard:
                         code.putln(preprocessor_guard)
-                    code.putln('#if CYTHON_COMPILING_IN_CPYTHON')
+                    code.putln('#if CYTHON_UPDATE_DESCRIPTOR_DOC')
                     code.putln("{")
                     code.putln(
                         'PyObject *wrapper = PyObject_GetAttrString((PyObject *)%s, "%s"); %s' % (

Cython/Utility/ModuleSetupCode.c

@@ -109,6 +109,9 @@
   #define CYTHON_USE_DICT_VERSIONS 0
   #undef CYTHON_USE_EXC_INFO_STACK
   #define CYTHON_USE_EXC_INFO_STACK 0
+  #ifndef CYTHON_UPDATE_DESCRIPTOR_DOC
+    #define CYTHON_UPDATE_DESCRIPTOR_DOC 0
+  #endif
 #elif defined(PYPY_VERSION)
   #define CYTHON_COMPILING_IN_PYPY 1
   #define CYTHON_COMPILING_IN_CPYTHON 0
@@ -162,6 +165,9 @@
   #define CYTHON_USE_DICT_VERSIONS 0
   #undef CYTHON_USE_EXC_INFO_STACK
   #define CYTHON_USE_EXC_INFO_STACK 0
+  #ifndef CYTHON_UPDATE_DESCRIPTOR_DOC
+    #define CYTHON_UPDATE_DESCRIPTOR_DOC (PYPY_VERSION_HEX >= 0x07030900)
+  #endif
 #elif defined(CYTHON_LIMITED_API)
   // EXPERIMENTAL !!
   #define CYTHON_COMPILING_IN_PYPY 0
@@ -219,6 +225,9 @@
   #define CYTHON_USE_DICT_VERSIONS 0
   #undef CYTHON_USE_EXC_INFO_STACK
   #define CYTHON_USE_EXC_INFO_STACK 0
+  #ifndef CYTHON_UPDATE_DESCRIPTOR_DOC
+    #define CYTHON_UPDATE_DESCRIPTOR_DOC 0
+  #endif
 #else
   #define CYTHON_COMPILING_IN_PYPY 0
   #define CYTHON_COMPILING_IN_CPYTHON 1
@@ -312,6 +321,9 @@
   #elif !defined(CYTHON_USE_EXC_INFO_STACK)
     #define CYTHON_USE_EXC_INFO_STACK 1
   #endif
+  #ifndef CYTHON_UPDATE_DESCRIPTOR_DOC
+    #define CYTHON_UPDATE_DESCRIPTOR_DOC 1
+  #endif
 #endif
 
 #if !defined(CYTHON_FAST_PYCCALL)

Cython/Utility/TypeConversion.c

@@ -509,7 +509,9 @@ static CYTHON_INLINE PyObject* __Pyx__PyNumber_Float(PyObject* obj) {
     if (unlikely(val == -1 && PyErr_Occurred())) {
         return NULL;
     }
+#if CYTHON_USE_PYLONG_INTERNALS
 no_error:
+#endif
     return PyFloat_FromDouble(val);
 }