X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fxstrtoul.h;h=76b728f8646a0c93ba62b1c994ab258b27fe47db;hb=ea12546cdee0548bded92ecffcf257aa5b6a125f;hp=2e7aec07fe997b7053ca3299fef74f69c5fde598;hpb=783c1624bd8b027a65b3fba57d3213ccb1a6ddbd;p=gnulib.git

diff --git a/lib/xstrtoul.h b/lib/xstrtoul.h
index 2e7aec07f..76b728f86 100644
--- a/lib/xstrtoul.h
+++ b/lib/xstrtoul.h
@@ -1,7 +1,13 @@
-#ifndef _xstrtoul_h_
-# define _xstrtoul_h_ 1
+#ifndef XSTRTOUL_H_
+# 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 /* _xstrtoul_h_ */
+#endif /* not XSTRTOUL_H_ */