[  5%] Building C object CMakeFiles/cen64.dir/device/netapi.c.o
[  7%] Building C object CMakeFiles/cen64.dir/os/posix/timer.c.o
In file included from /boot/home/src/cen64-master/os/posix/timer.c:12:0:
/boot/home/src/cen64-master/os/posix/timer.c: In function 'get_time':
/boot/home/src/cen64-master/os/posix/timer.h:21:24: error: 'CLOCK_MONOTONIC_RAW' undeclared (first use in this function)
 #define GETTIME_SOURCE CLOCK_MONOTONIC_RAW
                        ^
/boot/home/src/cen64-master/os/posix/timer.c:39:17: note: in expansion of macro 'GETTIME_SOURCE'
   clock_gettime(GETTIME_SOURCE, t);
                 ^
/boot/home/src/cen64-master/os/posix/timer.h:21:24: note: each undeclared identifier is reported only once for each function it appears in
 #define GETTIME_SOURCE CLOCK_MONOTONIC_RAW
                        ^
/boot/home/src/cen64-master/os/posix/timer.c:39:17: note: in expansion of macro 'GETTIME_SOURCE'
   clock_gettime(GETTIME_SOURCE, t);
                 ^
CMakeFiles/cen64.dir/build.make:734: recipe for target 'CMakeFiles/cen64.dir/os/posix/timer.c.o' failed
make[2]: *** [CMakeFiles/cen64.dir/os/posix/timer.c.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/cen64.dir/all' failed
make[1]: *** [CMakeFiles/cen64.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2