[Bug bootstrap/48400] [4.7 Regression] powerpc-apple-darwin9 fails to bootstrap at revision 171824

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48400

--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-04-02 22:59:09 UTC ---
> Created attachment 23855 [details]
> second proposed patch

Unfortunately it does not work either.

> The fault is 100% with ld.  GCC is producing valid dwarf2.

There is no point to complain about the ld in darwin9: it won't be fixed and
the error is not present in darwin10 (even if it fails to bootstrap for other
reasons, see pr48403).

> The *only* changes in your diff are (1) the description of the standard
> opcodes, and (2) an empty line number region that has been removed.

I see three differences:


*** 819,826 ****
      .byte    0x1    # Minimum Instruction Length
      .byte    0x1    # Default is_stmt_start flag
      .byte    0xf6    # Line Base Value (Special Opcodes)
!     .byte    0xf5    # Line Range Value (Special Opcodes)
!     .byte    0xa    # Special Opcode Base
      .byte    0    # opcode: 0x1 has 0 args
      .byte    0x1    # opcode: 0x2 has 1 args
      .byte    0x1    # opcode: 0x3 has 1 args
--- 819,826 ----
      .byte    0x1    # Minimum Instruction Length
      .byte    0x1    # Default is_stmt_start flag
      .byte    0xf6    # Line Base Value (Special Opcodes)
!     .byte    0xf2    # Line Range Value (Special Opcodes)
!     .byte    0xd    # Special Opcode Base
      .byte    0    # opcode: 0x1 has 0 args
      .byte    0x1    # opcode: 0x2 has 1 args
      .byte    0x1    # opcode: 0x3 has 1 args
***************

*** 830,835 ****
--- 830,838 ----
      .byte    0    # opcode: 0x7 has 0 args
      .byte    0    # opcode: 0x8 has 0 args
      .byte    0x1    # opcode: 0x9 has 1 args
+     .byte    0    # opcode: 0xa has 0 args
+     .byte    0    # opcode: 0xb has 0 args
+     .byte    0x1    # opcode: 0xc has 1 args
      .ascii "../../../../gcc-4-7-reghunt/libgcc/../gcc\0"    # Directory
Entry: 0x1
      .ascii "../../../../gcc-4-7-reghunt/libgcc/../gcc/config/i386\0"    #
Directory Entry: 0x2
      .byte    0    # End directory table
***************

*** 847,858 ****
      .byte    0    # uleb128 0
      .byte    0    # End file name table
  LELTP0:
-     .byte    0    # DW_LNE_set_address
-     .byte    0x9    # uleb128 0x9
-     .byte    0x2
-     .quad    Letext0
-     .byte    0    # DW_LNE_end_sequence
-     .byte    0x1    # uleb128 0x1
-     .byte    0x1
  LELT0:
      .subsections_via_symbols
--- 850,854 ----

Are the values

!     .byte    0xf2    # Line Range Value (Special Opcodes)
!     .byte    0xd    # Special Opcode Base

OK?