-/* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
- * enable them on 5.10 */
-#if VMG_HAS_PERL(5, 10, 0)
-# define VMG_UVAR 1
-#else
-# define VMG_UVAR 0
-#endif
-
-#if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
-# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
-#else
-# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
-#endif
-
-/* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
- * reverted to dev-5.11 as 9cdcb38b */
-#if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
-# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
-# if VMG_HAS_PERL(5, 11, 0)
-# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
-# else
-# define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
-# endif
-# endif
-# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
-# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
-# endif
-#else
-# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
-# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
-# endif
-# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
-# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
-# endif
-#endif
-
-/* Applied to dev-5.11 as 34908 */
-#if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
-# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
-#else
-# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
-#endif
-
-/* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
-#if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
-# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
-#else
-# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0