cc -O2 -pipe -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/timezone.c -o time/timezone -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lstdthreads -lcrypt
time/timezone.c:8:14: error: use of undeclared identifier 'timezone'
    8 | long *foo = &timezone;
      |              ^
1 error generated.