Add misalignment warning.

2015-10-16  Andrew Stubbs  <ams@codesourcery.com>

	bfd/
	* elf64-ppc.c (ppc64_elf_set_toc): Warn about misaligned sections.

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index e5344df..1bcde43 100644
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -12615,6 +12615,7 @@ ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
 {
   asection *s;
   bfd_vma TOCstart, adjust;
+  static bfd_boolean warned = FALSE;
 
   if (info != NULL)
     {
@@ -12695,6 +12696,14 @@ ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
   TOCstart -= adjust;
   _bfd_set_gp_value (obfd, TOCstart);
 
+  if (!warned && adjust != 0)
+    {
+      info->callbacks->einfo
+	(_("%B: warning: section `%A' not %d-byte aligned in linker script\n"),
+	 obfd, s, TOC_BASE_ALIGN);
+      warned = TRUE;
+    }
+
   if (info != NULL && s != NULL)
     {
       struct ppc_link_hash_table *htab = ppc_hash_table (info);