Tru64

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(aka Digital Unix or OSF/1)

Older versions (<= 4.0F, possibly others) don't support "long long" formats in their printf family.

getaddrinfo(3)

Tru64 has to completely separate implementations of getaddrinfo with different semantics. These show up in nm output as ogetaddrinfo and ngetaddrinfo. There's a preprocessor directive to select one or the other.