This patch comes from upstream:
https://gitlab.freedesktop.org/farstream/farstream/-/merge_requests/4

From 54987d445ea714b467d901b7daf8c09ed0644189 Mon Sep 17 00:00:00 2001
From: Debarshi Ray <debarshir@freedesktop.org>
Date: Thu, 12 Mar 2020 14:07:23 +0100
Subject: [PATCH] build: Adapt to backwards incompatible change in GNU Make 4.3

GNU Make 4.3 has a backwards incompatible change affecting the use of
number signs or hashes (ie., #) inside function invocations. See:
https://lists.gnu.org/archive/html/info-gnu/2020-01/msg00004.html

In this case, it would expand the '\#' in the '\n\#include \"$(h)\"'
argument to the foreach call to '\#', not '#'. This would lead to
spurious backslashes in front of the '#include' directives in the
generated fs-enumtypes.c file.

Spotted by Ernestas Kulik.
---
 common-modified/gst-glib-gen.mak | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common-modified/gst-glib-gen.mak b/common-modified/gst-glib-gen.mak
index 14f1ba37..2247a41c 100644
--- a/common-modified/gst-glib-gen.mak
+++ b/common-modified/gst-glib-gen.mak
@@ -6,7 +6,8 @@
 #glib_gen_prefix=gst_color_balance
 #glib_gen_basename=colorbalance
 
-enum_headers=$(foreach h,$(glib_enum_headers),\n\#include \"$(h)\")
+hash:=\#
+enum_headers=$(foreach h,$(glib_enum_headers),\n$(hash)include \"$(h)\")
 
 # these are all the rules generating the relevant files
 $(glib_gen_basename)-enumtypes.h: $(glib_enum_headers)
-- 
GitLab

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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Nicolas Goaziou &lt;mail@nicolasgoaziou.fr&gt;</td><td class='right'>2020-05-07 18:08:28 +0200</td></tr>
<tr><th>committer</th><td>Nicolas Goaziou &lt;mail@nicolasgoaziou.fr&gt;</td><td class='right'>2020-05-07 18:08:28 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/?id=8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e'>8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e</a> (<a href='/guix/patch/?id=8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e'>255800e645c3ba4cfd23a07b960f175839fbdc12</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/?id=2bee789a47eb61d17945d6cb87700c9719ebe887'>2bee789a47eb61d17945d6cb87700c9719ebe887</a> (<a href='/guix/diff/?id=8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e&amp;id2=2bee789a47eb61d17945d6cb87700c9719ebe887'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e.tar.gz'>guix-8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e.tar.gz</a><br/><a href='/guix/snapshot/guix-8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e.zip'>guix-8ba2aa22f1b972b0bb0844c6ad1557b44eab2f7e.zip</a><br/></td></tr></table>
<div class='commit-subject'>gnu: Add emacs-tramp.</div><div class='commit-msg'>* gnu/packages/emacs-xyz.scm (emacs-tramp): New variable.
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