Remove use of deprecated ustat interface in glibc 2.28:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85835

Adapted to GCC 4 series from this upstream patch:
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=260684

--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -81,7 +81,6 @@
 #include <sys/statvfs.h>
 #include <sys/timex.h>
 #include <sys/user.h>
-#include <sys/ustat.h>
 #include <linux/cyclades.h>
 #include <linux/if_eql.h>
 #include <linux/if_plip.h>
@@ -163,7 +162,19 @@
   unsigned struct_old_utsname_sz = sizeof(struct old_utsname);
   unsigned struct_oldold_utsname_sz = sizeof(struct oldold_utsname);
   unsigned struct_itimerspec_sz = sizeof(struct itimerspec);
-  unsigned struct_ustat_sz = sizeof(struct ustat);
+  // Use pre-computed size of struct ustat to avoid <sys/ustat.h> which
+  // has been removed from glibc 2.28.
+#if defined(__aarch64__) || defined(__s390x__) || defined (__mips64) \
+  || defined(__powerpc64__) || defined(__arch64__) || defined(__sparcv9) \
+  || defined(__x86_64__)
+#define SIZEOF_STRUCT_USTAT 32
+#elif defined(__arm__) || defined(__i386__) || defined(__mips__) \
+  || defined(__powerpc__) || defined(__s390__)
+#define SIZEOF_STRUCT_USTAT 20
+#else
+#error Unknown size of struct ustat
+#endif
+  unsigned struct_ustat_sz = SIZEOF_STRUCT_USTAT;
 #endif // SANITIZER_LINUX
 
 #if SANITIZER_LINUX && !SANITIZER_ANDROID
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<div class='path'>path: <a href='/guix/log/?id=ce59688d33ebddb52cea719efb1d8a51ea13adf0'>root</a>/<a href='/guix/log/doc?id=ce59688d33ebddb52cea719efb1d8a51ea13adf0'>doc</a>/<a href='/guix/log/doc/images?id=ce59688d33ebddb52cea719efb1d8a51ea13adf0'>images</a>/<a href='/guix/log/doc/images/shepherd-graph.dot?id=ce59688d33ebddb52cea719efb1d8a51ea13adf0'>shepherd-graph.dot</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/doc/images/shepherd-graph.dot?id=ce59688d33ebddb52cea719efb1d8a51ea13adf0&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2016-12-17 14:46:42 +0100'>2016-12-17</span></td><td><a href='/guix/commit/doc/images/shepherd-graph.dot?id=aaee461b9d5fb85fc1a548877dc7eea3dd4fbf50'>doc: Update dot graphs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/images/bootstrap-packages.dot,
doc/images/coreutils-bag-graph.dot, doc/images/coreutils-graph.dot,
doc/images/shepherd-graph.dot: Regenerate.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-01-29 20:21:54 +0300'>2016-01-29</span></td><td><a href='/guix/commit/doc/images/shepherd-graph.dot?id=710fa231f03633fe243b52635479d591946fec44'>guix system: Rename 'dmd-graph' to 'shepherd-graph'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/images/dmd-graph.dot: Rename to...
* doc/images/shepherd-graph.dot: ... this.
* doc.am (DOT_FILES): Adjust accordingly.
* guix/scripts/system.scm (dmd-service-node-label)
  (dmd-service-node-type, export-dmd-graph): Rename to...
  (shepherd-service-node-label, shepherd-service-node-type)
  (export-shepherd-graph): ... this.
  (show-help, process-action, process-command): Rename 'dmd-graph' to
  'shepherd-graph'.
* emacs/guix-command.el (guix-command-additional-execute-arguments)
  (guix-command-special-executors): Likewise.
* doc/guix.texi: Likewise.
* doc/emacs.texi (Emacs Popup Interface): Likewise.
</span></span></td><td>Alex Kost</td></tr>