This fixes linking libfstest/test-fcntl (and others).

As discussed with upstream: https://lists.gnu.org/archive/html/bug-hurd/2020-03/msg00018.html

From 96a9f67a8685e713f25259c18306797d54cc27a5 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Sat, 14 Mar 2020 11:28:31 +0100
Subject: [PATCH] build: Fix cross build on Guix.

As discussed in https://lists.gnu.org/archive/html/bug-hurd/2020-03/msg00018.html.

* Makeconf (lpath): Add -Wl,-rpath-link=<dir> next to -L<dir>.
---
 Makeconf | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makeconf b/Makeconf
index 67f7ab1c..f68ff6e3 100644
--- a/Makeconf
+++ b/Makeconf
@@ -325,7 +325,8 @@ _libsubst=${libsubst$(patsubst %,-override,${libsubst-override})}
 
 # Direct the linker where to find shared objects specified in the
 # dependencies of other shared objects it encounters.
-lpath := -L. $(patsubst %,-L%,$(dir $(wildcard ../lib*/lib*.so)))
+lib_dirs := $(dir $(wildcard ../lib*/lib*.so))
+lpath := -L. $(lib_dirs:%=-L%) $(lib_dirs:%=-Wl,-rpath-link=%)
 
 # Main rule to link executables
 #
-- 
2.24.0

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<div class='path'>path: <a href='/guix/log/?id=b493ae86a6387902658061058b2d68b4c04f6f9c'>root</a>/<a href='/guix/log/build-aux?id=b493ae86a6387902658061058b2d68b4c04f6f9c'>build-aux</a>/<a href='/guix/log/build-aux/build-self.scm?id=b493ae86a6387902658061058b2d68b4c04f6f9c'>build-self.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/build-aux/build-self.scm?id=b493ae86a6387902658061058b2d68b4c04f6f9c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-07-18 11:18:29 +0100'>2024-07-18</span></td><td><a href='/guix/commit/build-aux/build-self.scm?id=d82ac48b076dca156319c16e78acfadab52fd3e5'>guix: channels: Enable specifiying available builtin builders.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2021-11-27 00:49:53 +0100'>2021-11-27</span></td><td><a href='/guix/commit/build-aux/build-self.scm?id=5c1ba739d432397e7107021fd6cb3ec01aecfb64'>build-self: Help users to submit useful bug reports.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-04-29 11:24:48 -0400'>2021-04-29</span></td><td><a href='/guix/commit/build-aux/build-self.scm?id=fbc2a52a32ddc664db8ebab420c2e17b1432c744'>download: Use Disarchive as a last resort.</a><span class='msg-avail'>...</span></td><td>Timothy Sample</td></tr>