Include net/if.h before net/if_dl.h #2361
Merged
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Summary
if_dl.h: error: unknown type name 'u_char'; did you mean 'char'?
#2360Description
In old versions of macOS, net/if_dl.h neglects to include sys/types.h, which results in build failure:
Including net/if.h first works around the problem because net/if.h includes sys/types.h.