const unsigned long, const unsigned long, const unsigned long, \
const unsigned long);
-static char * weak_operand_overflow_check
+static const char * weak_operand_overflow_check
(const expressionS *, const CGEN_OPERAND *);
static void queue_fixup_recursively
overflow, so signal it by returning an error string. Any other case is
ambiguous, so we assume it's OK and return NULL. */
-static char *
+static const char *
weak_operand_overflow_check (const expressionS * exp,
const CGEN_OPERAND * operand)
{