clang -O2  -Wall -Wextra -Werror=implicit-function-declaration time/timer_settime.c -o time/timer_settime -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm  -lintl
../out/minix/basic/time/timer_settime.o: In function `main':
time/timer_settime.c:(.text+0x3f0): undefined reference to `timer_create'
time/timer_settime.c:(.text+0x452): undefined reference to `__timer_settime50'
clang: error: linker command failed with exit code 1 (use -v to see invocation)