clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations strings/strcasecmp_l.c -o strings/strcasecmp_l -D_POSIX_C_SOURCE=202405L  -lm  -lintl
strings/strcasecmp_l.c:5:40: error: type specifier missing, defaults to 'int' [-Werror,-Wimplicit-int]
int (*foo)(const char *, const char *, locale_t) = strcasecmp_l;
                                       ^
strings/strcasecmp_l.c:5:52: error: use of undeclared identifier 'strcasecmp_l'; did you mean 'strcasecmp'?
int (*foo)(const char *, const char *, locale_t) = strcasecmp_l;
                                                   ^~~~~~~~~~~~
                                                   strcasecmp
/usr/include/strings.h:63:6: note: 'strcasecmp' declared here
int      strcasecmp(const char *, const char *);
         ^
strings/strcasecmp_l.c:5:7: error: incompatible pointer types initializing 'int (*)(const char *, const char *, int)' with an expression of type 'int (const char *, const char *)' [-Werror,-Wincompatible-pointer-types]
int (*foo)(const char *, const char *, locale_t) = strcasecmp_l;
      ^                                            ~~~~~~~~~~~~
3 errors generated.