clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/clock_getcpuclockid.c -o time/clock_getcpuclockid -D_POSIX_C_SOURCE=202405L  -lm  -lintl
time/clock_getcpuclockid.c:6:34: error: use of undeclared identifier 'clock_getcpuclockid'
int (*foo)(pid_t, clockid_t *) = clock_getcpuclockid;
                                 ^
1 error generated.