Fix warnings on Linux/i686

Fixes:
../sysdeps/i386/dl-machine.h:336:30: warning: unused variable ‘refsym’ [-Wunused-variable]
rtld.c:1435:3: warning: implicit declaration of function ‘_dl_discover_osversion’ [-Wimplicit-function-declaration]

ChangeLog

@@ -1,3 +1,8 @@
+2012-05-17  Andreas Jaeger  <[email protected]>
+
+	* sysdeps/i386/dl-machine.h (elf_machine_rel): Declare refsym only
+	when it is used.
+
 2012-05-17  Chris Metcalf  <[email protected]>
 
 	* stdio-common/bug22.c (TIMEOUT): Bump up from 30 to 60.

nptl/ChangeLog

@@ -1,3 +1,9 @@
+2012-05-17  Andreas Jaeger  <[email protected]>
+
+	* sysdeps/unix/sysv/linux/i386/i686/dl-sysdep.h
+	(HAVE_DL_DISCOVER_OSVERSION): Don't declare _dl_discover_osversion
+	only for older kernels.
+
 2012-05-15  Joseph Myers  <[email protected]>
 
 	* pthreadP.h [!__NR_set_robust_list] (__NR_set_robust_list): Do

nptl/sysdeps/unix/sysv/linux/i386/i686/dl-sysdep.h

@@ -1,5 +1,5 @@
 /* System-specific settings for dynamic linker code.  IA-32 version.
-   Copyright (C) 2002, 2003, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2002-2012 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
@@ -58,9 +58,7 @@ extern void _dl_sysinfo_int80 (void) attribute_hidden;
 #endif
 
 
-/* The _dl_discover_osversion function is so far only needed in sysconf
-   to check for kernels later than 2.6.23.  */
-#if !defined __ASSEMBLER__ && __LINUX_KERNEL_VERSION < 0x020617
+#ifndef __ASSEMBLER__
 /* Get version of the OS.  */
 extern int _dl_discover_osversion (void) attribute_hidden;
 # define HAVE_DL_DISCOVER_OSVERSION	1

sysdeps/i386/dl-machine.h

@@ -1,5 +1,5 @@
 /* Machine-dependent ELF dynamic relocation inline functions.  i386 version.
-   Copyright (C) 1995-2005, 2006, 2009, 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
@@ -333,7 +333,9 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
   else
 # endif	/* !RTLD_BOOTSTRAP and have no -z combreloc */
     {
+# ifndef RTLD_BOOTSTRAP
       const Elf32_Sym *const refsym = sym;
+# endif
       struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
       Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;