#ifndef INCLUDED_ent_inf_h_
#define INCLUDED_ent_inf_h_
+#if defined HAVE_MATH_H
+# include <math.h>
+#endif /* HAVE_MATH_H */
+#if defined HAVE_LIMITS_H
+# include <limits.h>
+#endif /* HAVE_LIMITS_H */
+#if defined HAVE_VALUES_H
+# include <values.h>
+#endif /* HAVE_VALUES_H */
+
#if defined HAVE_STDBOOL_H
# include <stdbool.h>
#endif /* HAVE_STDBOOL_H */