This fixes <https://sourceware.org/bugzilla/show_bug.cgi?id=18781>
whereby, on 32-bit platforms, libc 2.22 would fail to pass O_LARGEFILE
to 'openat'.  This was caught by 'tests/sparse03.at' in the tar
test suite.

commit eb32b0d40308166c4d8f6330cc2958cb1e545075
Author: Andreas Schwab <schwab@suse.de>
Date:   Mon Aug 10 14:12:47 2015 +0200

    Readd O_LARGEFILE flag for openat64 (bug 18781)

--- a/sysdeps/unix/sysv/linux/openat.c
+++ b/sysdeps/unix/sysv/linux/openat.c
@@ -68,6 +68,11 @@ __OPENAT (int fd, const char *file, int oflag, ...)
       va_end (arg);
     }
 
+  /* We have to add the O_LARGEFILE flag for openat64.  */
+#ifdef MORE_OFLAGS
+  oflag |= MORE_OFLAGS;
+#endif
+
   return SYSCALL_CANCEL (openat, fd, file, oflag, mode);
 }
 libc_hidden_def (__OPENAT)
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<div class='path'>path: <a href='/guix/log/?id=5d387030e8ccc87234a1197cb2bb9fdac1b074ee'>root</a>/<a href='/guix/log/tests?id=5d387030e8ccc87234a1197cb2bb9fdac1b074ee'>tests</a>/<a href='/guix/log/tests/guix-download.sh?id=5d387030e8ccc87234a1197cb2bb9fdac1b074ee'>guix-download.sh</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/tests/guix-download.sh?id=5d387030e8ccc87234a1197cb2bb9fdac1b074ee&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2017-08-20 20:55:45 +0800'>2017-08-20</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=a02967d77af03d6468e25d6e26dbea0db919ce96'>guix download: Support retrieving local file without the URI scheme.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (guix-download): Treat the URL argument as a local
file path when it fails on 'string-&gt;uri'.  Call 'fetch' with the processed
'uri' instead of the original URL argument.
* tests/guix-download.sh: Adjust accordingly.
</span></span></td><td>宋文武</td></tr>
<tr><td><span title='2016-11-16 18:00:41 +0100'>2016-11-16</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=1bcc87bb685b7985512add221f10e4cb58b5f6f7'>guix download: Add '-o' option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (download-to-file, download-to-store*): New
procedures.
(%default-options): Add 'download-proc'.
(show-help): Adjust description and document '-o'.
(%options): Add '-o'.
(guix-download): Remove 'store' variable.  Add 'fetch' and define 'path'
to as its result.
* tests/guix-download.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-11-23 17:48:35 +0100'>2015-11-23</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=86cdfc451bad61faa66f100208c95f3275050957'>guix download: Fail when more than one URL is passed.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (guix-download)[parse-option]: Call 'leave'
when passed an extra argument.
* tests/guix-download.sh: Add test.
</span></span></td><td>Ludovic Courtès</td></tr>