Always set l_used for vDSO.

ChangeLog

@@ -1,3 +1,9 @@
+2012-02-29  Marek Polacek  <polacek@redhat.com>
+
+	[BZ #13706]
+	* elf/rtld.c (dl_main): Always set l_used to 1 for vDSO.
+	* elf/Makefile: Add rules to run tst-unused-dep.out.
+
 2012-02-28  David S. Miller  <davem@davemloft.net>
 
 	* sysdeps/sparc/sparc32/fpu/w_sqrt.S: New file.

NEWS

@@ -13,7 +13,7 @@ Version 2.16
   5993, 6884, 6907, 9739, 9902, 10110, 10140, 10210, 11174, 11322, 11365,
   11494, 12047, 13058, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
   13532, 13533, 13547, 13551, 13552, 13553, 13555, 13559, 13583, 13618,
-  13637, 13695, 13704, 13738
+  13637, 13695, 13704, 13706, 13738
 
 * ISO C11 support:
 

elf/Makefile

@@ -1203,3 +1203,14 @@ $(objpfx)tst-relsort1mod1.so: $(libm) $(objpfx)tst-relsort1mod2.so
 $(objpfx)tst-relsort1mod2.so: $(libm)
 $(objpfx)tst-relsort1.out: $(objpfx)tst-relsort1mod1.so \
 			   $(objpfx)tst-relsort1mod2.so
+
+tests: $(objpfx)tst-unused-dep.out
+
+$(objpfx)tst-unused-dep.out: $(objpfx)testobj1.so
+	LD_TRACE_LOADED_OBJECTS=1 \
+	LD_DEBUG=unused \
+	LD_PRELOAD= \
+	$(elf-objpfx)${rtld-installed-name} \
+	  --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
+	  $< > $@
+	cmp $@ /dev/null > /dev/null

elf/rtld.c

@@ -1,5 +1,5 @@
 /* Run time dynamic linker.
-   Copyright (C) 1995-2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -1375,6 +1375,9 @@ of this helper program; chances are you did not intend to run this program.\n\
 	  _dl_setup_hash (l);
 	  l->l_relocated = 1;
 
+	  /* The vDSO is always used.  */
+	  l->l_used = 1;
+
 	  /* Initialize l_local_scope to contain just this map.  This allows
 	     the use of dl_lookup_symbol_x to resolve symbols within the vdso.
 	     So we create a single entry list pointing to l_real as its only