Fix a regression in glibc 2.27 when built without ldconfig.  See
<https://sourceware.org/bugzilla/show_bug.cgi?id=22977> for details.

diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 6137304b0b..7d630f36d8 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -508,7 +508,7 @@ for linking")
 # ifndef __ASSEMBLER__
 #  if !defined SHARED && IS_IN (libc) && !defined LIBC_NONSHARED \
       && (!defined PIC || !defined NO_HIDDEN_EXTERN_FUNC_IN_PIE) \
-      && !defined NO_HIDDEN
+      && !defined NO_HIDDEN && defined USE_LDCONFIG
 #   define __hidden_proto_hiddenattr(attrs...) \
   __attribute__ ((visibility ("hidden"), ##attrs))
 #   define hidden_proto(name, attrs...) \
);'>
<option value='koszko' selected='selected'>koszko</option>
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<div class='path'>path: <a href='/guix/log/?id=838c1c4bd7b8be8976e2d0645727c376f8b37b21'>root</a>/<a href='/guix/log/etc?id=838c1c4bd7b8be8976e2d0645727c376f8b37b21'>etc</a>/<a href='/guix/log/etc/guix-daemon.service.in?id=838c1c4bd7b8be8976e2d0645727c376f8b37b21'>guix-daemon.service.in</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/etc/guix-daemon.service.in?id=838c1c4bd7b8be8976e2d0645727c376f8b37b21&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-10-23 02:00:26 +0200'>2022-10-23</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=068f1a1905099f32beec9a8c4904efbb4c503981'>etc: systemd services shouldn't ‘RemainAfterExit’.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.service.in (RemainAfterExit): Don't.
* etc/guix-publish.service.in (RemainAfterExit): Likewise don't.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-10-23 02:00:25 +0200'>2022-10-23</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=0f6ec662f626eb5ff0685a20ca7e153dae7442e6'>etc: Add ‘Restart=always’ to both systemd services.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.service.in (Restart): ‘Always’ do.
* etc/guix-publish.service.in (Restart): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-10-23 02:00:00 +0200'>2022-10-23</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=f16d91295a743d43b1604103b1399a621badea8c'>etc: Add ‘OOMPolicy=continue’ to guix-daemon.service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.service.in (OOMPolicy): Continue.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-07-07 23:54:20 -0400'>2021-07-07</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=4cbe0127a668cbcc64087c5d311308b59d39b104'>guix-install.sh: Prompt for configuring substitutes discovery.</a><span class='msg-avail'>...<span class='msg-tooltip'>Also ensure prompt_yes_no always print the message with a trailing space,
which is more pleasing to the eye.

* etc/guix-daemon.conf.in &lt;--discover=no&gt;: New guix-daemon option.
* etc/guix-daemon.service.in: Likewise.
* etc/init.d/guix-daemon.in: Likewise.
* etc/openrc/guix-daemon.in: Likewise.
* etc/guix-install.sh (configure_substitute_discovery): New procedure.
(sys_enable_guix_daemon): Ask the user whether automatic substitute discovery
should be enabled.  Set the '--discover' argument accordingly.
(prompt_yes_no): Add a trailing space to the message.
(sys_authorize_build_farms): Remove trailing space from the message argument.
* NEWS (Distribution): Add news.
</span></span></td><td>Maxim Cournoyer</td></tr>