AI_ADDRCONFIG      54 ext/socket/addrinfo.h #undef AI_ADDRCONFIG
AI_ADDRCONFIG     108 ext/socket/addrinfo.h #define	AI_ADDRCONFIG	0x00000400 /* only if any address is assigned */
AI_ADDRCONFIG    1617 ext/socket/constdefs.h #  define AI_ADDRCONFIG AI_ADDRCONFIG