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...) \
on value='koszko' selected='selected'>koszko</option>
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<tr><td><span title='2020-04-04 12:45:36 +0200'>2020-04-04</span></td><td><a href='/guix/commit/gnu/packages/dico.scm?id=5f98b84cd95480b392d4e86b437259c57d07c568'>gnu: dico: Make some inputs native.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dico.scm (dico)[inputs]: Move groff from here...
[native-inputs]: ...to this new field.

Signed-off-by: Mathieu Othacehe &lt;m.othacehe@gmail.com&gt;
</span></span></td><td>Vincent Legoll</td></tr>
<tr><td><span title='2019-06-15 18:24:52 +0200'>2019-06-15</span></td><td><a href='/guix/commit/gnu/packages/dico.scm?id=d2de780272a000d72c0a2d3898f968c57fd2cf2e'>gnu: dico: Update to 2.9.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dico.scm (dico): Update to 2.9.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-09-27 03:51:06 +0200'>2018-09-27</span></td><td><a href='/guix/commit/gnu/packages/dico.scm?id=3d190d6a219d03dc94c8d33614766df0fed1473f'>gnu: dico: Update to 2.7.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dico.scm (dico): Update to 2.7.
[arguments]: Work around dodgy test in 'check' phase.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-08-28 12:35:02 +0200'>2018-08-28</span></td><td><a href='/guix/commit/gnu/packages/dico.scm?id=1ae29e3f5a1f13b4ddfedd066b2e55556db031ce'>gnu: dico: Update to 2.6.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dico.scm (dico): Update to 2.6.
[inputs]: Switch to GUILE-2.2.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-29 20:46:55 +0200'>2018-01-29</span></td><td><a href='/guix/commit/gnu/packages/dico.scm?id=a6a9e628693ed2d49cd9cdfca597fd4e63bbdef0'>gnu: dico: Update to 2.5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dico.scm (dico): Update to 2.5.
[inputs]: Add wordnet.
</span></span></td><td>Efraim Flashner</td></tr>