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[committed arm/ilp32] aarch64: Fix bits/utmp.h for GCC 8

fixed a warning issue in the arm/ilp32 build, the branch is still based
on the 2.27 release.

The same suppression of -Wstringop-truncation warnings as in commit
7532837d7b03b3ca5b9a63d77a5bd81dd23f3d9c but for aarch64.

2018-02-22  Szabolcs Nagy  <>

	* sysdeps/unix/sysv/linux/aarch64/bits/utmp.h (struct utmp): Use
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/utmp.h b/sysdeps/unix/sysv/linux/aarch64/bits/utmp.h
index 850517573e..027dceb82c 100644
--- a/sysdeps/unix/sysv/linux/aarch64/bits/utmp.h
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/utmp.h
@@ -61,10 +61,13 @@ struct utmp
   short int ut_type;		/* Type of login.  */
   pid_t ut_pid;			/* Process ID of login process.  */
-  char ut_line[UT_LINESIZE];	/* Devicename.  */
+  char ut_line[UT_LINESIZE]
+     __attribute_nonstring__;	/* Devicename.  */
   char ut_id[4];		/* Inittab ID.  */
-  char ut_user[UT_NAMESIZE];	/* Username.  */
-  char ut_host[UT_HOSTSIZE];	/* Hostname for remote login.  */
+  char ut_user[UT_NAMESIZE]
+     __attribute_nonstring__;	/* Username.  */
+  char ut_host[UT_HOSTSIZE]
+     __attribute_nonstring__;	/* Hostname for remote login.  */
   struct exit_status ut_exit;	/* Exit status of a process marked
 				   as DEAD_PROCESS.  */
 /* The ut_session and ut_tv fields must be the same size when compiled

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