#include <data/vector.h>
#include <language/expressions/public.h>
#include <libpspp/compiler.h>
+#include <libpspp/i18n.h>
#include <libpspp/message.h>
#include <libpspp/misc.h>
#include <libpspp/str.h>
extern const struct substring empty_string;
-int compare_string (const struct substring *, const struct substring *);
+int compare_string_3way (const struct substring *, const struct substring *);
double expr_ymd_to_date (double year, double month, double day);
double expr_ymd_to_ofs (double year, double month, double day);