Merge pull request #2525 from xypron/riscv64 #582

Job	Run time
build	1m 1s
build (--enable-snmp --enable-snmp-rfc --enable-json --enable-dbus --disable-checksum-compat --en...	1m 12s
build (--enable-dbus --enable-dbus-create-instance --disable-dynamic-linking --disable-fwmark --d...	1m 28s
build (--enable-dynamic-linking --disable-vrrp-auth --enable-snmp-rfc --disable-snmp-reply-v3-for...	1m 2s
build (--disable-libnl --enable-snmp-checker --disable-vmac)	1m 0s
build (--enable-conversion-checks --enable-stacktrace --enable-mem-check --enable-mem-check-log -...	1m 8s
build (--disable-lvs --enable-snmp-vrrp --enable-snmp-rfc --enable-json --enable-dbus --disable-r...	1m 7s
build (--disable-vrrp --enable-snmp-checker --enable-regex)	59s
build (--disable-hardening --enable-dump-threads --enable-epoll-debug --enable-snmp-rfcv3 --enabl...	1m 4s
build (--enable-snmp-rfc --enable-snmp --enable-dbus --enable-json --enable-bfd --enable-regex --...	1m 17s
	11m 18s

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