[binutils-gdb] NDS32/BFD: Correct an aliasing error in `nds32_elf_check_relocs'

[Maciej W.Rozycki <macro at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=61034b0b6acc6ff72def5f5ecdbe628edc5d67ea

commit 61034b0b6acc6ff72def5f5ecdbe628edc5d67ea
Author: Maciej W. Rozycki <macro@imgtec.com>
Date:   Tue Oct 18 04:34:36 2016 +0100

    NDS32/BFD: Correct an aliasing error in `nds32_elf_check_relocs'
    
    Fix an aliasing build error:
    
    cc1: warnings being treated as errors
    .../bfd/elf32-nds32.c: In function 'nds32_elf_check_relocs':
    .../bfd/elf32-nds32.c:6644: warning: dereferencing type-punned pointer will break strict-aliasing rules
    make[3]: *** [elf32-nds32.lo] Error 1
    
    in a way following commit 6edfbbad0864 ("Fix up gcc4.1 aliasing
    warnings"), <https://sourceware.org/ml/binutils/2005-10/msg00071.html>.
    
    	bfd/
    	* elf32-nds32.c (nds32_elf_check_relocs): Avoid aliasing warning
    	from GCC.

Diff:
---
 bfd/ChangeLog     | 5 +++++
 bfd/elf32-nds32.c | 5 +++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 4dc5256..1e34b19 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,10 @@
 2016-10-18  Maciej W. Rozycki  <macro@imgtec.com>
 
+	* elf32-nds32.c (nds32_elf_check_relocs): Avoid aliasing warning
+	from GCC.
+
+2016-10-18  Maciej W. Rozycki  <macro@imgtec.com>
+
 	* elf32-arm.c (elf32_arm_update_relocs): Rename `index' local
 	variable to `reloc_index'.
 
diff --git a/bfd/elf32-nds32.c b/bfd/elf32-nds32.c
index 81195a4..fdeada7 100644
--- a/bfd/elf32-nds32.c
+++ b/bfd/elf32-nds32.c
@@ -6629,6 +6629,7 @@ nds32_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
 	      else
 		{
 		  asection *s;
+		  void *vpp;
 
 		  Elf_Internal_Sym *isym;
 		  isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
@@ -6640,8 +6641,8 @@ nds32_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
 		  if (s == NULL)
 		    return FALSE;
 
-		  head = ((struct elf_nds32_dyn_relocs **)
-			&elf_section_data (s)->local_dynrel);
+		  vpp = &elf_section_data (s)->local_dynrel;
+		  head = (struct elf_nds32_dyn_relocs **) vpp;
 		}
 
 	      p = *head;