[krbdev.mit.edu #8349] use __APPLE_USE_RFC_3542 to get IPV6_PKTINFO on Mac OS X

Tom Yu via RT rt-comment at krbdev.mit.edu
Wed Jan 20 14:38:38 EST 2016

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For some reason, Mac OS X has a <netinet.h> that doesn't define
IPV6_PKTINFO unless one of __APPLE_USE_RFC_2292 or __APPLE_USE_RFC_3542
is set.  There is no default.  We should #define __APPLE_USE_RFC_3542
before including <netinet.h> if we want to get IPV6_PKTINFO on Mac OS X.

This is with Xcode 7.2 on Mac OS 10.10.5.

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Next message: [krbdev.mit.edu #8350] Add IP_RECVDSTADDR/IP_SENDSRCADDR support to net-server.c
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