gh-116417: Build _testinternalcapi with limited C API version 3.5 (#116598)

Author: vstinner

Modules/_testlimitedcapi/heaptype_relative.c

@@ -1,3 +1,9 @@
+// Need limited C API version 3.12 for PyType_FromMetaclass()
+#include "pyconfig.h"   // Py_GIL_DISABLED
+#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API )
+#  define Py_LIMITED_API 0x030c0000
+#endif
+
 #include "parts.h"
 #include <stddef.h>               // max_align_t
 #include <string.h>               // memset

Modules/_testlimitedcapi/parts.h

@@ -7,8 +7,9 @@
 #include "pyconfig.h"   // Py_GIL_DISABLED
 
 // Use the limited C API
-#ifndef Py_GIL_DISABLED
-#  define Py_LIMITED_API 0x030c0000  // 3.12
+#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API )
+   // need limited C API version 3.5 for PyModule_AddFunctions()
+#  define Py_LIMITED_API 0x03050000
 #endif
 
 // Make sure that the internal C API cannot be used.

Modules/_testlimitedcapi/vectorcall_limited.c

@@ -1,5 +1,11 @@
 /* Test Vectorcall in the limited API */
 
+// Need limited C API version 3.12 for PyObject_Vectorcall()
+#include "pyconfig.h"   // Py_GIL_DISABLED
+#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API )
+#  define Py_LIMITED_API 0x030c0000
+#endif
+
 #include "parts.h"
 #include "clinic/vectorcall_limited.c.h"