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It has been replaced by 'gdbm_errno_location', a function that returns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

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<div class='path'>path: <a href='/guix/log/?id=3ecf9d44bb927fc88223a15431428cb741dd1c2c'>root</a>/<a href='/guix/log/gnu?id=3ecf9d44bb927fc88223a15431428cb741dd1c2c'>gnu</a>/<a href='/guix/log/gnu/packages?id=3ecf9d44bb927fc88223a15431428cb741dd1c2c'>packages</a>/<a href='/guix/log/gnu/packages/gd.scm?id=3ecf9d44bb927fc88223a15431428cb741dd1c2c'>gd.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/gd.scm?id=3ecf9d44bb927fc88223a15431428cb741dd1c2c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-02 10:55:08 +0000'>2023-03-02</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=7df09ee0ab3e7962ef27859ce87e06a323059284'>Merge remote-tracking branch 'savannah/master' into core-updates</a><span class='msg-avail'>...<span class='msg-tooltip'>Conflicts:
	gnu/local.mk
	gnu/packages/autotools.scm
	gnu/packages/cmake.scm
	gnu/packages/gnuzilla.scm
	gnu/packages/haskell.scm
	gnu/packages/pdf.scm
	gnu/packages/python-xyz.scm
	gnu/packages/samba.scm
	gnu/packages/tex.scm
	gnu/packages/tls.scm
	gnu/packages/wxwidgets.scm
</span></span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2023-02-25 00:00:32 +0100'>2023-02-25</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=5c4240442cd39fd5d279e080184f0ee2fb1c8af4'>gnu: perl-gd: Use gexps.</a><span class='msg-avail'>...<span class='msg-tooltip'>This helps cross-compilation: in that case, '%build-inputs' was unbound.

* gnu/packages/gd.scm (perl-gd)[arguments]: Rewrite using gexps.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-02-25 00:00:32 +0100'>2023-02-25</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=279b0122b63502f1d5ea027025dcc4dd4180e478'>gnu: perl-gd: Remove input labels.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (perl-gd)[inputs]: Remove labels.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-07-06 00:35:17 +0200'>2022-07-06</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=ffcf6a51405bb4aa2d86072d6cb1c174870c625c'>gnu: gd: Remove input labels.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (gd)[inputs]: Remove labels.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-07-06 00:35:16 +0200'>2022-07-06</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=37fa56cf6efdd2c14a27e59973e51a698513122e'>gnu: gd: Add release-monitoring-url.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (gd)[properties]: Set upstream-name and
release-monitoring-url.
</span></span></td><td>Marius Bakke</td></tr>