cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/setresgid.c -o unistd/setresgid -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
unistd/setresgid.c:11:35: error: ‘setresgid’ undeclared here (not in a function); did you mean ‘setegid’?
   11 | int (*foo)(gid_t, gid_t, gid_t) = setresgid;
      |                                   ^~~~~~~~~
      |                                   setegid