DECIMAL_COMPACT_SHORT
DECIMAL_COMPACT_LONG
POSIX_SC_OPEN_MAXIPPROTO_ICMP
IPPROTO_ICMPV6
TCP_FUNCTION_BLK (somente FreeBSD)
TCP_FUNCTION_ALIAS (somente FreeBSD)
TCP_REUSPORT_LB_NUMA (somente FreeBSD)
TCP_REUSPORT_LB_NUMA_NODOM (somente FreeBSD)
TCP_REUSPORT_LB_NUMA_CURDOM (somente FreeBSD)
TCP_BBR_ALGORITHM (somente FreeBSD)
AF_PACKET (somente Linux)
IP_BINDANY (somente FreeBSD/NetBSD/OpenBSD)
SO_BUSY_POLL (somente Linux)
UDP_SEGMENT (somente Linux)
SHUT_RD
SHUT_WR
SHUT_RDWR
IMAGETYPE_HEIF
IMAGETYPE_SVG
quando a libxml estiver carregada.