From 1da99396dc65993ba34ac0370ca5d6acda6a3322 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@netris.org>
Date: Sun, 18 Mar 2018 07:02:37 -0400
Subject: [PATCH] Add support for gdbm-1.14.

As of gdbm-1.14, 'gdbm_errno' no longer exists as a binary interface.
It has been replaced by 'gdbm_errno_location', a function that returns
int*.  We now use this new interface if it's available.
---
 gdbm.scm | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/gdbm.scm b/gdbm.scm
index b92992f..4d38cc3 100644
--- a/gdbm.scm
+++ b/gdbm.scm
@@ -17,6 +17,9 @@
 ;; You should have received a copy of the GNU General Public License
 ;; along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+;; Modified by Mark H Weaver <mhw@netris.org> in March 2018 to support
+;; gdbm-1.14 with its new 'gdbm_errno_location' interface.
+
 (define-module (gdbm)
   #:use-module (system foreign)
   #:use-module (rnrs bytevectors)
@@ -151,10 +154,21 @@
 
 ;;; errors
 
-(define %errno (dynamic-pointer "gdbm_errno" libgdbm))
+(define %list-int
+  (list int))
+
+(define (dereference-int ptr)
+  (apply (lambda (errno) errno)
+         (parse-c-struct ptr %list-int)))
+
+(define %errno-location
+  (or (false-if-exception
+       (let ((func (dynamic-func "gdbm_errno_location" libgdbm)))
+         (pointer->procedure '* func '())))
+      (const (dynamic-pointer "gdbm_errno" libgdbm))))
 
 (define (gdbm-errno)
-  (pointer-address (dereference-pointer %errno)))
+  (dereference-int (%errno-location)))
 
 (define (gdbm-error)
   (error (pointer->string (%gdbm-strerror (gdbm-errno)))))
-- 
2.16.2

s/image-viewers.scm'>
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<div class='path'>path: <a href='/guix/log/?id=f246bfb448f759794687e4a440ddfb55099d9f2d'>root</a>/<a href='/guix/log/gnu?id=f246bfb448f759794687e4a440ddfb55099d9f2d'>gnu</a>/<a href='/guix/log/gnu/packages?id=f246bfb448f759794687e4a440ddfb55099d9f2d'>packages</a>/<a href='/guix/log/gnu/packages/image-viewers.scm?id=f246bfb448f759794687e4a440ddfb55099d9f2d'>image-viewers.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/image-viewers.scm?id=f246bfb448f759794687e4a440ddfb55099d9f2d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-09-10 02:00:00 +0200'>2023-09-10</span></td><td><a href='/guix/commit/gnu/packages/image-viewers.scm?id=38c2c076e24ee1f6c0e2c4fcf9a5143ce8d0cdc2'>gnu: feh: Update to 3.10.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/image-viewers.scm (feh): Update to 3.10.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-08-22 12:32:21 -0400'>2023-08-22</span></td><td><a href='/guix/commit/gnu/packages/image-viewers.scm?id=5e234d228ae2410719bbe365e23ebf0312157f13'>gnu: qtimageformats: Rename variable to qtimageformats-5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/qt.scm (qtimageformats): Rename to...
(qtimageformats-5): ... this.
* gnu/packages/telegram.scm (telegram-desktop): Adjust accordingly.
* gnu/packages/image-viewers.scm (qview): Likewise.
* gnu/packages/geo.scm (openorienteering-mapper): Likewise.
</span></span></td><td>Maxim Cournoyer</td></tr>