clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations langinfo/nl_langinfo_l.c -o langinfo/nl_langinfo_l -D_POSIX_C_SOURCE=202405L  -lm  -lintl
langinfo/nl_langinfo_l.c:5:23: error: type specifier missing, defaults to 'int' [-Werror,-Wimplicit-int]
char *(*foo)(nl_item, locale_t) = nl_langinfo_l;
                      ^
langinfo/nl_langinfo_l.c:5:35: error: use of undeclared identifier 'nl_langinfo_l'; did you mean 'nl_langinfo'?
char *(*foo)(nl_item, locale_t) = nl_langinfo_l;
                                  ^~~~~~~~~~~~~
                                  nl_langinfo
/usr/include/langinfo.h:88:7: note: 'nl_langinfo' declared here
char *nl_langinfo(nl_item);
      ^
langinfo/nl_langinfo_l.c:5:9: error: incompatible pointer types initializing 'char *(*)(nl_item, int)' with an expression of type 'char *(nl_item)' [-Werror,-Wincompatible-pointer-types]
char *(*foo)(nl_item, locale_t) = nl_langinfo_l;
        ^                         ~~~~~~~~~~~~~
3 errors generated.