auth_socket plugin fails to build on OpenBSD with MariaDB 10.0.14

[1129/1310] /usr/bin/cc  -DHAVE_CONFIG_H -DHAVE_SOCKPEERCRED -DMYSQL_DYNAMIC_PLUGIN -Dauth_socket_EXPORTS -Wall -O2 -pipe   -Wall -O2 -g -DNDEBUG -DDBUG_OFF -fPIC -Iinclude -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/include -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/sql -Ipcre -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/pcre -MMD -MT plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o -MF plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o.d -o plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o   -c /home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/plugin/auth_socket/auth_socket.c

FAILED: /usr/bin/cc  -DHAVE_CONFIG_H -DHAVE_SOCKPEERCRED -DMYSQL_DYNAMIC_PLUGIN -Dauth_socket_EXPORTS -Wall -O2 -pipe   -Wall -O2 -g -DNDEBUG -DDBUG_OFF -fPIC -Iinclude -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/include -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/sql -Ipcre -I/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/pcre -MMD -MT plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o -MF plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o.d -o plugin/auth_socket/CMakeFiles/auth_socket.dir/auth_socket.c.o   -c /home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/plugin/auth_socket/auth_socket.c

/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/plugin/auth_socket/auth_socket.c: In function 'socket_auth':

/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/plugin/auth_socket/auth_socket.c:67: error: storage size of 'cred' isn't known

/home/ports/pobj/mariadb-10.0.14/mariadb-10.0.14/plugin/auth_socket/auth_socket.c:67: warning: unused variable 'cred'

ninja: build stopped: subcommand failed.