From 5bc1e5fdd87aa205011512cd1e6cc655bcf677fd Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Wed, 23 Jun 2021 15:31:42 +0300
Subject: [PATCH] Fix definition of ITEM_NOT_FOUND for pre-1.13 versions.

Upstream-Status: Backport
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
---
 ext/GDBM_File/GDBM_File.xs | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/ext/GDBM_File/GDBM_File.xs b/ext/GDBM_File/GDBM_File.xs
index 494c2889ca89..0125b5dcac4d 100644
--- a/ext/GDBM_File/GDBM_File.xs
+++ b/ext/GDBM_File/GDBM_File.xs
@@ -145,10 +145,11 @@ output_datum(pTHX_ SV *arg, char *str, int size)
 #define gdbm_setopt(db,optflag,optval,optlen) not_here("gdbm_setopt")
 #endif
 
-#if GDBM_VERSION_MAJOR == 1 && GDBM_VERSION_MINOR < 13        
-/* Prior to 1.13, gdbm_fetch family functions set gdbm_errno to GDBM_NO_ERROR
-   if the requested key did not exist */
-# define ITEM_NOT_FOUND()  (gdbm_errno == GDBM_NO_ERROR)
+#if GDBM_VERSION_MAJOR == 1 && GDBM_VERSION_MINOR < 13
+/* Prior to 1.13, only gdbm_fetch set GDBM_ITEM_NOT_FOUND if the requested
+   key did not exist.  Other similar function wouls set GDBM_NO_ERROR instead.
+   The GDBM_ITEM_NOT_FOUND existeds as early as in 1.7.3 */
+# define ITEM_NOT_FOUND()  (gdbm_errno == GDBM_NO_ERROR || gdbm_errno == GDBM_ITEM_NOT_FOUND)
 #else
 # define ITEM_NOT_FOUND()  (gdbm_errno == GDBM_ITEM_NOT_FOUND)
 #endif