make command fails on PC-BSD 10.1 with type and identifier errors

[sysfu]

Trying to build the clog dependency for cyphertite, however getting stuck on these errors below

$ make
Warning: Object directory not changed from original /usr/home/seth/Downloads/clog
cc  -O2 -pipe  -Wall -Werror -g -I/usr/home/seth/Downloads/clog -I/usr/local/include -std=gnu99 -Qunused-arguments -fstack-protector  -c clog.c -o clog.o
In file included from clog.c:19:
/usr/home/seth/Downloads/clog/clog.h:106:1: error: unknown type name '__dead'
__dead void      clog_fatal(const char *);
^
/usr/home/seth/Downloads/clog/clog.h:106:8: error: expected identifier or '('
__dead void      clog_fatal(const char *);
       ^
/usr/home/seth/Downloads/clog/clog.h:107:1: error: unknown type name '__dead'
__dead void      clog_fatalx(const char *, ...);
^
/usr/home/seth/Downloads/clog/clog.h:107:8: error: expected identifier or '('
__dead void      clog_fatalx(const char *, ...);
       ^
clog.c:91:2: error: implicit declaration of function 'gettimeofday' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        gettimeofday(&clog_start_of_day, NULL);
        ^
clog.c:220:4: error: implicit declaration of function 'timersub' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                        timersub(&now, &clog_start_of_day, &elapsed);
                        ^
clog.c:383:1: error: unknown type name '__dead'
__dead void
^
clog.c:383:8: error: expected identifier or '('
__dead void
       ^
clog.c:398:1: error: unknown type name '__dead'
__dead void
^
clog.c:398:8: error: expected identifier or '('
__dead void
       ^
clog.c:437:22: error: implicit declaration of function 'SA_LEN' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0,
                            ^
11 errors generated.
*** Error code 1

Stop.
make: stopped in /usr/home/seth/Downloads/clog