Error: Failed to build shellinabox: command execution failed

[valorisa]

sudo port -vvv install shellinabox

shellinabox/launcher.c:819:11: note: enclose 'ptsname_r' in a __builtin_available check to silence this warning
      if (ptsname_r (*pty, path, length)) {
          ^~~~~~~~~
1 warning and 1 error generated.
make[1]: *** [shellinabox/launcher.o] Error 1
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-shellinabox-e45d8f2'
make: *** [all] Error 2
make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-shellinabox-e45d8f2'
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-2.20" && /usr/bin/make -j4 -w all 
Exit code: 2
Error: Failed to build shellinabox: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port shellinabox failed

main.log

:info:build     ^
:info:build shellinabox/launcher.c:819:11: warning: 'ptsname_r' is only available on macOS 10.13.4 or newer [-Wunguarded-availability-new]
:info:build       if (ptsname_r (*pty, path, length)) {
:info:build           ^~~~~~~~~
:info:build /usr/include/stdlib.h:229:5: note: 'ptsname_r' has been explicitly marked partial here
:info:build int ptsname_r(int fildes, char *buffer, size_t buflen) __API_AVAILABLE(macos(10.13.4), ios(11.3), tvos(11.3), watchos(4.3));
:info:build     ^
:info:build shellinabox/launcher.c:819:11: note: enclose 'ptsname_r' in a __builtin_available check to silence this warning
:info:build       if (ptsname_r (*pty, path, length)) {
:info:build           ^~~~~~~~~
:info:build 1 warning and 1 error generated.
:info:build make[1]: *** [shellinabox/launcher.o] Error 1
:info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-shellinabox-e45d8f2'
:info:build make: *** [all] Error 2
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-shellinabox-e45d8f2'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/work/shellinabox-2.20" && /usr/bin/make -j4 -w all 
:info:build Exit code: 2
:error:build Failed to build shellinabox: command execution failed
:debug:build Error code: CHILDSTATUS 2761 2
:debug:build Backtrace: command execution failed
:debug:build     while executing
:debug:build "system {*}$notty {*}$nice $fullcmdstring"
:debug:build     invoked from within
:debug:build "command_exec build"
:debug:build     (procedure "portbuild::build_main" line 8)
:debug:build     invoked from within
:debug:build "$procedure $targetname"
:error:build See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_net_shellinabox/shellinabox/main.log for details.