Hello,

% uname -a
FreeBSD SRV-SYNTH 11.2-RELEASE-p5 FreeBSD 11.2-RELEASE-p5 #0 r341363: Sun Dec  2 12:35:44 CET 2018     r00t@SRV-SYNTH:/usr/obj/usr/src/sys/BSD112017110501PHY  amd64

% svnlite info /usr/ports | grep Rev
Revision: 487038
Last Changed Rev: 487038

Trying to build the latest NSD 4.1.26 with dnstap support enabled:

--- configlexer.o ---
cc -I/usr/local/include -I. -O2 -pipe  -fstack-protector -fno-strict-aliasing  -W -Wall -Wextra -Wdeclaration-after-statement -I/usr/local/include/google -c configlexer.c
--- options.o ---
cc -I/usr/local/include -I. -O2 -pipe  -fstack-protector -fno-strict-aliasing  -W -Wall -Wextra -Wdeclaration-after-statement -I/usr/local/include/google -c ./options.c
--- dns.o ---
cc -I/usr/local/include -I. -O2 -pipe  -fstack-protector -fno-strict-aliasing  -W -Wall -Wextra -Wdeclaration-after-statement -I/usr/local/include/google -c ./dns.c
--- zonec.o ---
cc -I/usr/local/include -I. -O2 -pipe  -fstack-protector -fno-strict-aliasing  -W -Wall -Wextra -Wdeclaration-after-statement -I/usr/local/include/google -c ./zonec.c
--- dnstap.o ---
cc -I/usr/local/include -I. -O2 -pipe  -fstack-protector -fno-strict-aliasing  -W -Wall -Wextra -Wdeclaration-after-statement -I/usr/local/include/google -c ./dnstap/dnstap.c
./dnstap/dnstap.c:322:10: error: no member named 'ss_family' in 'struct sockaddr_in'; did you mean 'sin_family'?
        if (ss->ss_family == AF_INET) {
                ^~~~~~~~~
                sin_family
/usr/include/netinet/in.h:97:14: note: 'sin_family' declared here
        sa_family_t     sin_family;
                        ^
1 error generated.
*** [dnstap.o] Error code 1

make[1]: stopped in /construction/xports/dns/nsd/work/nsd-4.1.26
1 error

make[1]: stopped in /construction/xports/dns/nsd/work/nsd-4.1.26
===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
*** Error code 1

Stop.
make: stopped in /xports/dns/nsd