cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wctype/towctrans.c -o wctype/towctrans -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
wctype/towctrans.c:5:36: error: ‘towctrans’ undeclared here (not in a function)
    5 | wint_t (*foo)(wint_t, wctrans_t) = towctrans;
      |                                    ^~~~~~~~~