Annex D (normative) Compatibility features [depr]

D.4 Array comparisons [depr.array.comp]

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Equality and relational comparisons ([expr.eq], [expr.rel]) between two operands of array type are deprecated.
[Note 1: 
Three-way comparisons ([expr.spaceship]) between such operands are ill-formed.
— end note]
[Example 1: int arr1[5]; int arr2[5]; bool same = arr1 == arr2; // deprecated, same as &arr1[0] == &arr2[0], // does not compare array contents auto cmp = arr1 <=> arr2; // error — end example]