File fix-stable-debugtypes.patch of Package gcc

This patch tweaks .debug_types generation to fix reproducible builds
in binutils and probably other packages. It affects C++ code that has
this kind of thing in a class definition:

static const int sarmag = 8;
  static const char armag[sarmag];

The fixed patch doesn't try to checksum the contents of the array
because they might be defined in another compilation unit, and the
purpose of the checksum is to unify debug info across compilation units.

Richard Braakman
richard.braakman@jollamobile.com

--- gcc-linaro-4.6-2013.01/gcc/dwarf2out.c	2013-01-15 10:27:09.000000000 +0200
+++ patched-gcc/gcc/dwarf2out.c	2013-06-25 21:45:21.932110768 +0300
@@ -9043,8 +9043,11 @@
 
     case dw_val_class_vec:
       CHECKSUM_ULEB128 (DW_FORM_block);
-      CHECKSUM_ULEB128 (sizeof (at->dw_attr_val.v.val_vec));
-      CHECKSUM (at->dw_attr_val.v.val_vec);
+      /* Don't checksum all of val_vec because it contains a pointer. */
+      CHECKSUM_ULEB128 (sizeof (at->dw_attr_val.v.val_vec.length)
+                        + sizeof (at->dw_attr_val.v.val_vec.elt_size));
+      CHECKSUM (at->dw_attr_val.v.val_vec.length);
+      CHECKSUM (at->dw_attr_val.v.val_vec.elt_size);
       break;
 
     case dw_val_class_flag: