cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/reallocarray.c -o stdlib/reallocarray -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
stdlib/reallocarray.c:5:40: error: use of undeclared identifier 'reallocarray'
    5 | void *(*foo)(void *, size_t, size_t) = reallocarray;
      |                                        ^
1 error generated.