I get "Anonymous types declared in an anonymous union are an extension" in icmpv6.h

[FederAndInk]

Here I get "Anonymous types declared in an anonymous union are an extension" when trying to be pedantic, it would be better to not rely on non-standard c++ :) this is the only issue I got with pedantic enabled.

libtins/include/tins/icmpv6.h

Lines 1507 to 1551 in b7e61f4

	struct {
	uint16_t identifier;
	uint16_t sequence;
	} u_echo;
	struct {
	#if TINS_IS_LITTLE_ENDIAN
	uint32_t reserved:5,
	override:1,
	solicited:1,
	router:1,
	reserved2:24;
	#else
	uint32_t router:1,
	solicited:1,
	override:1,
	reserved:29;
	#endif
	} u_nd_advt;
	struct {
	uint8_t hop_limit;
	#if TINS_IS_LITTLE_ENDIAN
	uint8_t reserved:3,
	router_pref:2,
	home_agent:1,
	other:1,
	managed:1;
	#else
	uint8_t managed:1,
	other:1,
	home_agent:1,
	router_pref:2,
	reserved:3;
	#endif
	uint16_t router_lifetime;
	} u_nd_ra;
	struct {
	uint8_t length;
	uint8_t unused[3];
	} rfc4884;
	// Multicast Listener Report Message (mld2)
	struct {
	uint16_t reserved;
	uint16_t record_count;
	} mlrm2;