Taken from upstream:
https://github.com/sigrokproject/pulseview/pull/39/commits/fb89dd11f2a4a08b73c498869789e38677181a8d.

From fb89dd11f2a4a08b73c498869789e38677181a8d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Wed, 28 Apr 2021 02:14:47 +0200
Subject: [PATCH] Fix broken build due to C++ template behind C linkage

glib/gatomic.h since 2.68 includes type_traits, which causes a compilation
error:
In file included from /usr/include/glib-2.0/glib/gatomic.h:31,
                 from /usr/include/glib-2.0/glib/gthread.h:32,
                 from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
                 from /usr/include/glib-2.0/glib.h:32,
                 from /usr/include/libsigrokdecode/libsigrokdecode.h:25,
                 from /home/abuild/rpmbuild/BUILD/pulseview-0.4.2/pv/data/decode/annotation.cpp:21:
/usr/include/c++/10/type_traits:2308:3: error: template with C linkage
2308 |   template<typename _CTp, typename _Rp>

As libsigrokdecode.h declares extern C linkage itself where necessary,
remove it from pulseviews include statements from the last two occasions.
---
 pv/data/decode/annotation.cpp  | 2 --
 pv/views/trace/decodetrace.cpp | 2 --
 2 files changed, 4 deletions(-)

diff --git a/pv/data/decode/annotation.cpp b/pv/data/decode/annotation.cpp
index 7f233478..f8a5c47b 100644
--- a/pv/data/decode/annotation.cpp
+++ b/pv/data/decode/annotation.cpp
@@ -17,9 +17,7 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-extern "C" {
 #include <libsigrokdecode/libsigrokdecode.h>
-}
 
 #include <cassert>
 #include <vector>
diff --git a/pv/views/trace/decodetrace.cpp b/pv/views/trace/decodetrace.cpp
index 409f1d28..888064d0 100644
--- a/pv/views/trace/decodetrace.cpp
+++ b/pv/views/trace/decodetrace.cpp
@@ -17,9 +17,7 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-extern "C" {
 #include <libsigrokdecode/libsigrokdecode.h>
-}
 
 #include <limits>
 #include <mutex>
v class='path'>path: <a href='/guix/log/?id=324f56927b5856d9b7629c594e7d2893916e8c16'>root</a>/<a href='/guix/log/gnu?id=324f56927b5856d9b7629c594e7d2893916e8c16'>gnu</a>/<a href='/guix/log/gnu/packages?id=324f56927b5856d9b7629c594e7d2893916e8c16'>packages</a>/<a href='/guix/log/gnu/packages/wdiff.scm?id=324f56927b5856d9b7629c594e7d2893916e8c16'>wdiff.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/wdiff.scm?id=324f56927b5856d9b7629c594e7d2893916e8c16&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
t'>Author</th></tr>
<tr><td><span title='2023-04-23 22:40:51 +0200'>2023-04-23</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=f16a99df2ed06a578dcedb8f015d90964247bf6e'>gnu: libraft: Disable test that requires connectivity.</a><span class='msg-avail'>...<span class='msg-tooltip'> * gnu/packages/cluster.scm (libraft): remove test_uv_tcp_connect.c

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Brian Cully</td></tr>
<tr><td><span title='2023-01-30 12:39:40 +0200'>2023-01-30</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=4cf1acc7f3033b50b0bf19e02c9f522d522d338c'>Merge remote-tracking branch 'origin/master' into core-updates</a><span class='msg-avail'>...<span class='msg-tooltip'> Conflicts:
	doc/guix.texi
	gnu/local.mk
	gnu/packages/admin.scm
	gnu/packages/base.scm
	gnu/packages/chromium.scm
	gnu/packages/compression.scm
	gnu/packages/databases.scm
	gnu/packages/diffoscope.scm
	gnu/packages/freedesktop.scm
	gnu/packages/gnome.scm
	gnu/packages/gnupg.scm
	gnu/packages/guile.scm
	gnu/packages/inkscape.scm
	gnu/packages/llvm.scm
	gnu/packages/openldap.scm
	gnu/packages/pciutils.scm
	gnu/packages/ruby.scm
	gnu/packages/samba.scm
	gnu/packages/sqlite.scm
	gnu/packages/statistics.scm
	gnu/packages/syndication.scm
	gnu/packages/tex.scm
	gnu/packages/tls.scm
	gnu/packages/version-control.scm
	gnu/packages/xml.scm
	guix/build-system/copy.scm
	guix/scripts/home.scm
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-11-23 10:16:47 +0100'>2022-11-23</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=80305088b53aebfcdd86a1b0ba44d0e981c428ce'>gnu: drbd-utils: Fix corrupted man page.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (drbd-utils)[native-inputs]: Change from
DOCBOOK-XSL to DOCBOOK-XSL-NEXT.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-11-03 20:00:31 +0100'>2022-11-03</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=2017d424e0c3d144b806089f396717f80950f37f'>gnu: drbd-utils: Update to 9.22.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (drbd-utils): Update to 9.22.0.
</span></span></td><td>Marius Bakke</td></tr>