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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<div class='path'>path: <a href='/guix/log/?id=f7da6b0be5b7c06d9a648085c550a7dd38f7913d'>root</a>/<a href='/guix/log/gnu?id=f7da6b0be5b7c06d9a648085c550a7dd38f7913d'>gnu</a>/<a href='/guix/log/gnu/build?id=f7da6b0be5b7c06d9a648085c550a7dd38f7913d'>build</a>/<a href='/guix/log/gnu/build/install.scm?id=f7da6b0be5b7c06d9a648085c550a7dd38f7913d'>install.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/build/install.scm?id=f7da6b0be5b7c06d9a648085c550a7dd38f7913d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-15 17:32:10 +0100'>2020-12-15</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=6a060ff27ff68384d7c90076baa36c349fff689d'>store-copy: 'populate-store' can optionally deduplicate files.</a><span class='msg-avail'>...<span class='msg-tooltip'>Until now deduplication was performed as an additional pass after
copying files, which involve re-traversing all the files that had just
been copied.

* guix/store/deduplication.scm (copy-file/deduplicate): New procedure.
* tests/store-deduplication.scm ("copy-file/deduplicate"): New test.
* guix/build/store-copy.scm (populate-store): Add #:deduplicate?
parameter and honor it.
* tests/gexp.scm ("gexp-&gt;derivation, store copy"): Pass #:deduplicate? #f
to 'populate-store'.
* gnu/build/image.scm (initialize-root-partition): Pass #:deduplicate?
to 'populate-store'.  Pass #:deduplicate? #f to 'register-closure'.
* gnu/build/vm.scm (root-partition-initializer): Likewise.
* gnu/build/install.scm (populate-single-profile-directory): Pass
 #:deduplicate? #f to 'populate-store'.
* gnu/build/linux-initrd.scm (build-initrd): Likewise.
* guix/scripts/pack.scm (self-contained-tarball)[import-module?]: New
procedure.
[build]: Pass it as an argument to 'source-module-closure'.
* guix/scripts/pack.scm (squashfs-image)[build]: Wrap in
'with-extensions'.
* gnu/system/linux-initrd.scm (expression-&gt;initrd)[import-module?]: New
procedure.
[builder]: Pass it to 'source-module-closure'.
* gnu/system/install.scm (cow-store-service-type)[import-module?]: New
procedure.  Pass it to 'source-module-closure'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-09-02 17:05:22 +0200'>2020-09-02</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=22827396baea149f193f6e9558b522e6d9c89a44'>install: Factorize cow-store procedure.</a><span class='msg-avail'>...<span class='msg-tooltip'>Move the cow-store procedure from the service declaration in (gnu system
install) to (gnu build install), so that it can be called from within a
different context than Shepherd.

* gnu/build/install.scm (mount-cow-store, unmount-cow-store): New procedures.
* gnu/system/install.scm (make-cow-store): Remove it,
(cow-store-service-type): adapt it accordingly.
</span></span></td><td>Mathieu Othacehe</td></tr>