+#include "data/dataset.h"
+#include "data/settings.h"
+#include "data/subcase.h"
+#include "data/variable.h"
+#include "language/command.h"
+#include "language/lexer/lexer.h"
+#include "language/stats/sort-criteria.h"
+#include "libpspp/message.h"
+#include "math/sort.h"
+
+#include "gl/xalloc.h"