cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdio/ctermid.c -o stdio/ctermid -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
stdio/ctermid.c:5:24: error: ‘ctermid’ undeclared here (not in a function)
    5 | char *(*foo)(char *) = ctermid;
      |                        ^~~~~~~