port: advance MSVC600 CPython compatibility frontier

scripts/fixtures/vc6_compound_literal_smoke.c

@@ -7,15 +7,16 @@
  * three distinct patterns:
  *
  *   1. `status = _PyStatus_OK();` -- a compound-literal macro used as a
- *      plain assignment's right-hand side. Fixed by calling the existing
- *      public API function PyStatus_Ok() instead, which
- *      Python/initconfig.c defines as `return _PyStatus_OK();` -- the
- *      identical value, no header change needed.
- *   2. `cf = _PyCompilerFlags_INIT;` -- likewise a compound-literal macro
+ *      plain assignment's right-hand side. The shared macro now expands to
+ *      a VC6-only internal helper that assigns PyStatus fields explicitly,
+ *      while newer compilers keep the original compound-literal form.
+ *   2. `status = _PyStatus_ERR("...");` -- same compound-literal macro
+ *      pattern for ERROR statuses, now using a VC6-only explicit helper.
+ *   3. `cf = _PyCompilerFlags_INIT;` -- likewise a compound-literal macro
  *      used as a plain assignment. Fixed by assigning PyCompilerFlags's
  *      two fields explicitly (cf_flags, cf_feature_version), matching the
  *      macro's own definition field-for-field.
- *   3. `_PyArgv args = { .argc = argc, ... };` -- a designated-initializer
+ *   4. `_PyArgv args = { .argc = argc, ... };` -- a designated-initializer
  *      aggregate initializer with no macro involved. Fixed by declaring
  *      the variable bare and assigning each field explicitly; field order
  *      does not matter for plain assignment, unlike an initializer list.
@@ -35,8 +36,18 @@ vc6_status_ok_smoke(void)
 {
     PyStatus status;
 
-    /* pattern 1: was `status = _PyStatus_OK();` */
-    status = PyStatus_Ok();
+    /* pattern 1: VC6-only _PyStatus_OK() macro fallback helper. */
+    status = _PyStatus_OK();
+    return status;
+}
+
+PyStatus
+vc6_status_error_smoke(void)
+{
+    PyStatus status;
+
+    /* pattern 2: VC6-only _PyStatus_ERR() macro fallback helper. */
+    status = _PyStatus_ERR("vc6 status error smoke");
     return status;
 }