# define XSTRTOUL_H_ 1
# define STRING_TO_UNSIGNED 1
+
+/* Undefine this symbol so we can include xstrtol.h a second time.
+ Otherwise, a program that wanted both xstrtol.h and xstrtoul.h
+ would never get the declaration corresponding to the header file
+ included after the first one. */
+# undef XSTRTOL_H_
# include "xstrtol.h"
#endif /* not XSTRTOUL_H_ */