options/internal: ensure FutexLockImpl alignment to 4 bytes #1155
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On m68k the default alignment of 2 bytes for a uint32_t will result in futex calls failing, as a futex must be 4-byte aligned.
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On m68k the default alignment of 2 bytes for a uint32_t may result in futex calls failing under some conditions, as a futex must be 4-byte aligned.