Re: 4.6.1 bootstrap failure on ia64

[Salvatore Filippone <salvatore dot filippone at uniroma2 dot it>]

Update: 
The same kind of error, mismatch in insn-emit.o between stage2 and stage
3, happens in 4.5.0 and in 4.6.1. 
Looking at objdump -x it seems to me that the major difference is in the
debug symbols present in stage3. There are a few differing addresses;  I
do not know the internals of obj files well enough to be certain, it
looks like they are just related to the inserted debug symbols taking up
space.  The start of the comparison is attached below, there is a huge
section in the stage3 file I am not including, but I can provide the
complete dumps if needed. This is from the 4.5.0 boot, the 4.6.1 is very
similar.

Thoughts/workarounds? 
Thanks a lot
Salvatore 
==============================================================
< stage2-gcc/insn-emit.o:     file format elf64-ia64-little
< stage2-gcc/insn-emit.o
---
> stage3-gcc/insn-emit.o:     file format elf64-ia64-little
> stage3-gcc/insn-emit.o
17c17,23
<   3 .IA_64.unwind_info 000049e8  0000000000000000  0000000000000000
000346b0  2**3
---
>   3 .debug_abbrev 00000427  0000000000000000  0000000000000000
000346b0  2**0
>                   CONTENTS, READONLY, DEBUGGING
>   4 .debug_info   0001920d  0000000000000000  0000000000000000
00034ad7  2**0
>                   CONTENTS, RELOC, READONLY, DEBUGGING
>   5 .debug_line   0000aa61  0000000000000000  0000000000000000
0004dce4  2**0
>                   CONTENTS, RELOC, READONLY, DEBUGGING
>   6 .IA_64.unwind_info 000049e8  0000000000000000  0000000000000000
00058748  2**3
19c25
<   4 .IA_64.unwind 00003b70  0000000000000000  0000000000000000
00039098  2**3
---
>   7 .IA_64.unwind 00003b70  0000000000000000  0000000000000000
0005d130  2**3
21c27
<   5 .rodata.str1.8 000000d0  0000000000000000  0000000000000000
0003cc08  2**3
---
>   8 .rodata.str1.8 000000d0  0000000000000000  0000000000000000
00060ca0  2**3
23c29
<   6 .sdata        00000020  0000000000000000  0000000000000000
0003ccd8  2**3
---
>   9 .sdata        00000020  0000000000000000  0000000000000000
00060d70  2**3
25c31
<   7 .rodata       000000ae  0000000000000000  0000000000000000
0003ccf8  2**3
---
>  10 .rodata       000000ae  0000000000000000  0000000000000000
00060d90  2**3
27c33,45
<   8 .comment      00000012  0000000000000000  0000000000000000
0003cda6  2**0
---
>  11 .debug_loc    000159c7  0000000000000000  0000000000000000
00060e3e  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  12 .debug_pubnames 00003457  0000000000000000  0000000000000000
00076805  2**0
>                   CONTENTS, RELOC, READONLY, DEBUGGING
>  13 .debug_pubtypes 00000e7f  0000000000000000  0000000000000000
00079c5c  2**0
>                   CONTENTS, RELOC, READONLY, DEBUGGING
>  14 .debug_aranges 00000030  0000000000000000  0000000000000000
0007aadb  2**0
>                   CONTENTS, RELOC, READONLY, DEBUGGING
>  15 .debug_ranges 00004b50  0000000000000000  0000000000000000
0007ab0b  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  16 .debug_str    0000f5cc  0000000000000000  0000000000000000
0007f65b  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  17 .comment      00000012  0000000000000000  0000000000000000
0008ec27  2**0
33a52,54
> 0000000000000000 l    d  .debug_abbrev        0000000000000000 
> 0000000000000000 l    d  .debug_info  0000000000000000 
> 0000000000000000 l    d  .debug_line  0000000000000000 
46a68,73
> 0000000000000000 l    d  .debug_loc   0000000000000000 
> 0000000000000000 l    d  .debug_pubnames      0000000000000000 
> 0000000000000000 l    d  .debug_pubtypes      0000000000000000 
> 0000000000000000 l    d  .debug_aranges       0000000000000000 
> 0000000000000000 l    d  .debug_ranges        0000000000000000 
> 0000000000000000 l    d  .debug_str   0000000000000000