Work with the new glob interface in glibc 2.27.

Taken from this upstream commit:
https://git.savannah.gnu.org/cgit/make.git/commit/?id=193f1e81edd6b1b56b0eb0ff8aa4b41c7b4257b4

diff --git a/dir.c b/dir.c
index adbb8a9..c343e4c 100644
--- a/dir.c
+++ b/dir.c
@@ -1299,15 +1299,40 @@ local_stat (const char *path, struct stat *buf)
 }
 #endif
 
+/* Similarly for lstat.  */
+#if !defined(lstat) && !defined(WINDOWS32) || defined(VMS)
+# ifndef VMS
+#  ifndef HAVE_SYS_STAT_H
+int lstat (const char *path, struct stat *sbuf);
+#  endif
+# else
+    /* We are done with the fake lstat.  Go back to the real lstat */
+#   ifdef lstat
+#     undef lstat
+#   endif
+# endif
+# define local_lstat lstat
+#elif defined(WINDOWS32)
+/* Windows doesn't support lstat().  */
+# define local_lstat local_stat
+#else
+static int
+local_lstat (const char *path, struct stat *buf)
+{
+  int e;
+  EINTRLOOP (e, lstat (path, buf));
+  return e;
+}
+#endif
+
 void
 dir_setup_glob (glob_t *gl)
 {
   gl->gl_opendir = open_dirstream;
   gl->gl_readdir = read_dirstream;
   gl->gl_closedir = free;
+  gl->gl_lstat = local_lstat;
   gl->gl_stat = local_stat;
-  /* We don't bother setting gl_lstat, since glob never calls it.
-     The slot is only there for compatibility with 4.4 BSD.  */
 }
 
 void
7747bfacfb45b0348eae1e'>tree</a><a href='/guix/commit/tests/guix-lint.sh?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e'>commit</a><a href='/guix/diff/tests/guix-lint.sh?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/guix-lint.sh'>
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<tr><td><span title='2021-02-22 12:07:45 +0100'>2021-02-22</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=9a38bed2cf32e9462badfa43e74cdd4580e804fc'>packages: 'package-field-location' handles 'search-path' returning #f.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/46390&gt;.
Reported by zimoun &lt;zimon.toutoune@gmail.com&gt;.

This is similar to the fix in d10474c38d58bdc676e64336769dc2e00cdfa8ed.

* guix/packages.scm (package-field-location): Handle FILE not in %LOAD-PATH.
* tests/guix-lint.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-09-28 21:06:36 -0500'>2020-09-28</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=d8934360d2453a403b5433e71d09188e4ed23b57'>tests: Simplify shell exit status negation;</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-lint.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh: Use the shell '!' keyword to negate command exit status
in place of 'if ...; then false; else true; fi'
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-08-23 23:05:16 +0200'>2020-08-23</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=d10474c38d58bdc676e64336769dc2e00cdfa8ed'>lint: formatting: Gracefully handle relative file names.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/42543&gt;.
Reported by Jack Hill &lt;jackhill@jackhill.us&gt;.

* guix/lint.scm (check-formatting): Always return a list (previously we
would return #f when 'search-path' returns #f).  Check whether
LOCATION's file is a relative file name.  Return a warning if not.
* tests/guix-lint.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-12-08 23:14:03 +0100'>2019-12-08</span></td><td><a href='/guix/commit/tests/guix-lint.sh?id=7282f9496793227d7ac6f902976aecb663068ec1'>lint: Add '--load-path' option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/lint.scm (%options): Add '--load-path' option.
* doc/guix.texi: Document it.
* tests/guix-lint.sh: Test it.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>zimoun</td></tr>