cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/getdate_err.c -o time/getdate_err -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lintl -liconv
time/getdate_err.c: In function ‘foo’:
time/getdate_err.c:10:19: error: ‘getdate_err’ undeclared (first use in this function)
   10 |         int bar = getdate_err;
      |                   ^~~~~~~~~~~
time/getdate_err.c:10:19: note: each undeclared identifier is reported only once for each function it appears in