Patch copied from Debian:

https://anonscm.debian.org/cgit/pkg-games/lierolibre.git/tree/debian/patches/0001-Use-unaligned-access-define-over-checking-arch.patch?id=82910748906855f6e6bfe30b3f077e8c793ae424

From 396f19b6b7743d394307f70f0c0108419824437b Mon Sep 17 00:00:00 2001
From: Martin Erik Werner <martinerikwerner@gmail.com>
Date: Sun, 28 Jun 2015 16:31:34 +0200
Subject: [PATCH 1/3] Use unaligned access define over checking arch

This todo item seems like it done, and just needed implementing...
---
 io/encoding.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gvl/io/encoding.hpp b/src/gvl/io/encoding.hpp
index c491677..89bb612 100644
--- a/src/gvl/io/encoding.hpp
+++ b/src/gvl/io/encoding.hpp
@@ -374,7 +374,7 @@ struct octet_stream_writer
 		// inlining of the common case
 		if(std::size_t(end_ - cur_) >= len)
 		{
-#if GVL_X86 || GVL_X86_64 // TODO: A define that says whether unaligned access is allowed
+#if GVL_UNALIGNED_ACCESS
 			if(len < 64) // TODO: Tweak this limit
 			{
 				while(len > 4)
-- 
2.4.6

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<tr><td><span title='2019-11-01 15:23:00 +0100'>2019-11-01</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=79f0bd7fb3e726883916173390e2704f91aa0c09'>gnu: sigrok-firmware-fx2lafw: Fix build.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (sigrok-firmware-fx2lafw)[arguments]: Remove
implicit inputs.
[native-inputs]: Add gawk, bash, coreutils, grep, gzip, gnu-make, sed and tar.
</span></span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2019-03-14 22:09:37 +0100'>2019-03-14</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=1e91d2ef3c4f87ae90b8c862d2a037694a6d698d'>gnu: sigrok-firmware-fx2lafw: Update to 0.1.6.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (sigrok-firmware-fx2lafw): Update to 0.1.6.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-10-30 23:40:42 +0100'>2018-10-30</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=58cd3123ac4d6fb704a07c2ab8165805db03da9a'>gnu: pulseview: Update to 0.4.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (pulseview): Update to 0.4.1.
[arguments]: Remove CMAKE_CXX_FLAGS from #:configure-flags. (Keep)
build(ing) the unit tests. Add a ‘remove-empty-doc-directory’ phase.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-10-30 23:40:42 +0100'>2018-10-30</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=61c58b7827b336877758d824aafd0c5e4a50713f'>gnu: sigrok-cli: Update to 0.7.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (sigrok-cli): Update to 0.7.1.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-10-26 02:30:52 +0200'>2018-10-26</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=2fba511e0fa2b39218101c2661864b6b570315c2'>gnu: libsigrok: Update to 0.5.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (libsigrok): Update to 0.5.1.
[arguments]: Adjust to split udev rules and clean up a little.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-09-15 03:38:31 +0200'>2018-09-15</span></td><td><a href='/guix/commit/gnu/packages/electronics.scm?id=bbe2a947995879ac0580463a420050f3b429425e'>gnu: libsigrokdecode: Update to 0.5.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/electronics.scm (libsigrokdecode): Update to 0.5.2.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>