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b7a249d26f
libunwind uses a minimal set of necessary standard library functions, basically just `memset` and `memcpy`. There is a single use of `strcpy` to copy the bytes `"CLNGUNW"` into a `uint64_t` object. This is both an arguably odd use of the `strcpy` function as well as it unnecessarily widens the set of library functions that must be available to build libunwind, which can be an obstacle in baremetal scenarios. This change simply replaces this one `strcpy` with the more fundamental `memcpy`.