Помогите установить програмку во FreeBSD

Не получается поставить програмку. Захожу в директорию инсталяции, пишу make install clear и вот что он мне выдаёт:

Build library in /root/Install/bpft-2.0/lib
gcc -O2 -I../include   -DPATH_TOSAVE=\"/var/log/\" -DPATH_TRAFSTAT=\"/usr/local/bin/trafstat\" -DPATH_TRAFSTAT_LOG=\"/var/log/trafstat.log\" -DPATH_TRAFLOG_FMT=\"/usr/local/etc/traflog.format\" -c util.c
In file included from util.c:49:
/usr/include/varargs.h:34:2: #error "<varargs.h> is obsolete with this version of GCC."
/usr/include/varargs.h:35:2: #error "Change your code to use <stdarg.h> instead."
util.c:108: error: syntax error before "va_dcl"
util.c:113: error: syntax error before "void"
util.c:115: warning: parameter names (without types) in function declaration
util.c:115: warning: data definition has no type or storage class
util.c:116: error: syntax error before "char"
util.c:116: warning: data definition has no type or storage class
util.c:118: warning: parameter names (without types) in function declaration
util.c:118: warning: data definition has no type or storage class
util.c:119: error: syntax error before "if"
*** Error code 1

Stop in /root/Install/bpft-2.0/lib.
*** Error code 1

Stop in /root/Install/bpft-2.0.

Как исправить это?