clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/CLOCK_PROCESS_CPUTIME_ID.c -o time/CLOCK_PROCESS_CPUTIME_ID -D_POSIX_C_SOURCE=202405L  -lm  -lintl
time/CLOCK_PROCESS_CPUTIME_ID.c:3:17: error: use of undeclared identifier 'CLOCK_PROCESS_CPUTIME_ID'
int const foo = CLOCK_PROCESS_CPUTIME_ID;
                ^
1 error generated.