Due to "historical reasons" both gcc and clang treat *all* trailing arrays members as flexible arrays, this has an evil side effect of inhibiting bounds checks on such members as __builtin_object_size cannot say for sure that: struct { ... type foo[3]; } has a trailing foo member of fixed size rather than unspecified. Ideally we should use -fstrict-flex-arrays as is, but we have to tolerate kernel uapi headers that use [0] and third party libraries written in c89 that may use [1] like curl.
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