clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations strings/strncasecmp_l.c -o strings/strncasecmp_l -D_POSIX_C_SOURCE=202405L  -lm  -lintl
strings/strncasecmp_l.c:5:48: error: type specifier missing, defaults to 'int' [-Werror,-Wimplicit-int]
int (*foo)(const char *, const char *, size_t, locale_t) = strncasecmp_l;
                                               ^
strings/strncasecmp_l.c:5:60: error: use of undeclared identifier 'strncasecmp_l'; did you mean 'strncasecmp'?
int (*foo)(const char *, const char *, size_t, locale_t) = strncasecmp_l;
                                                           ^~~~~~~~~~~~~
                                                           strncasecmp
/usr/include/strings.h:64:6: note: 'strncasecmp' declared here
int      strncasecmp(const char *, const char *, size_t);
         ^
strings/strncasecmp_l.c:5:7: error: incompatible pointer types initializing 'int (*)(const char *, const char *, size_t, int)' with an expression of type 'int (const char *, const char *, unsigned int)' [-Werror,-Wincompatible-pointer-types]
int (*foo)(const char *, const char *, size_t, locale_t) = strncasecmp_l;
      ^                                                    ~~~~~~~~~~~~~
3 errors generated.