tcpcrypt-devel build failure: error: ‘DLT_PKTAP’ undeclared (first use in this function)

[barracuda156]

--->  Building tcpcrypt-devel
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_security_tcpcrypt-devel/tcpcrypt-devel/work/tcpcrypt-0.5" && /usr/bin/make -j6 -w all 
make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_security_tcpcrypt-devel/tcpcrypt-devel/work/tcpcrypt-0.5'
/usr/bin/make  all-am
make[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_security_tcpcrypt-devel/tcpcrypt-devel/work/tcpcrypt-0.5'
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT src/tcpcryptd-freebsd.o -MD -MP -MF src/.deps/tcpcryptd-freebsd.Tpo -c -o src/tcpcryptd-freebsd.o `test -f 'src/freebsd.c' || echo './'`src/freebsd.c
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT src/tcpcryptd-unix.o -MD -MP -MF src/.deps/tcpcryptd-unix.Tpo -c -o src/tcpcryptd-unix.o `test -f 'src/unix.c' || echo './'`src/unix.c
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT shared/util_tcnetstat-socket_address.o -MD -MP -MF shared/.deps/util_tcnetstat-socket_address.Tpo -c -o shared/util_tcnetstat-socket_address.o `test -f 'shared/socket_address.c' || echo './'`shared/socket_address.c
depbase=`echo shared/socket_address.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
	/bin/sh ./libtool  --tag=CC   --mode=compile ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT shared/socket_address.lo -MD -MP -MF $depbase.Tpo -c -o shared/socket_address.lo shared/socket_address.c &&\
	mv -f $depbase.Tpo $depbase.Plo
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT util/tcs-tcs.o -MD -MP -MF util/.deps/tcs-tcs.Tpo -c -o util/tcs-tcs.o `test -f 'util/tcs.c' || echo './'`util/tcs.c
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT shared/util_tcs-socket_address.o -MD -MP -MF shared/.deps/util_tcs-socket_address.Tpo -c -o shared/util_tcs-socket_address.o `test -f 'shared/socket_address.c' || echo './'`shared/socket_address.c
mv -f src/.deps/tcpcryptd-freebsd.Tpo src/.deps/tcpcryptd-freebsd.Po
ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.   -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT unix/util_tcs-priv.o -MD -MP -MF unix/.deps/util_tcs-priv.Tpo -c -o unix/util_tcs-priv.o `test -f 'unix/priv.c' || echo './'`unix/priv.c
src/unix.c: In function ‘divert_open_pcap’:
src/unix.c:240: warning: implicit declaration of function ‘pcap_create’
src/unix.c:240: warning: assignment makes pointer from integer without a cast
src/unix.c:248: warning: implicit declaration of function ‘pcap_set_snaplen’
src/unix.c:249: warning: implicit declaration of function ‘pcap_set_timeout’
src/unix.c:250: warning: implicit declaration of function ‘pcap_activate’
src/unix.c:253: error: ‘DLT_PKTAP’ undeclared (first use in this function)
src/unix.c:253: error: (Each undeclared identifier is reported only once
src/unix.c:253: error: for each function it appears in.)
src/unix.c:259: error: ‘PCAP_NETMASK_UNKNOWN’ undeclared (first use in this function)
mv -f shared/.deps/util_tcnetstat-socket_address.Tpo shared/.deps/util_tcnetstat-socket_address.Po
make[1]: *** [src/tcpcryptd-unix.o] Error 1
make[1]: *** Waiting for unfinished jobs....
mv -f unix/.deps/util_tcs-priv.Tpo unix/.deps/util_tcs-priv.Po
mv -f shared/.deps/util_tcs-socket_address.Tpo shared/.deps/util_tcs-socket_address.Po
mv -f util/.deps/tcs-tcs.Tpo util/.deps/tcs-tcs.Po
libtool: compile:  ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I. -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT shared/socket_address.lo -MD -MP -MF shared/.deps/socket_address.Tpo -c shared/socket_address.c  -fno-common -DPIC -o shared/.libs/socket_address.o
libtool: compile:  ccache /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I. -I/opt/local/include -I./src -I./include -I./src -pipe -Os -arch ppc -Wall -Wno-deprecated-declarations -MT shared/socket_address.lo -MD -MP -MF shared/.deps/socket_address.Tpo -c shared/socket_address.c -o shared/socket_address.o >/dev/null 2>&1
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_security_tcpcrypt-devel/tcpcrypt-devel/work/tcpcrypt-0.5'
make: *** [all] Error 2

​https://github.com/scslab/tcpcrypt/issues/19