[PATCH] Accept DWARF 3-format debug info

[Julian Brown <julian@codesourcery.com>]

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Hi,

This is part of a series of patches from a CodeSourcery branch which 
enable the output of ARM's RVCT 2.2 compiler to be debugged with gdb.

ARMCC's support for DWARF 3 is superior to its DWARF 2 support, and GDB 
apparently supports much of DWARF 3 already. This patch allows DWARF 3 
format debug info to be accepted by gdb.

(Some things are notably missing from the DWARF 3 support -- one thing 
I've noticed so far is lack of support for DW_TAG_partial_unit, but RVDS 
2.2 doesn't seem to need that. A couple of other minor things will be 
addressed in followup patches.)

Tested with cross to arm-none-eabi, and natively on 
x86_64-unknown-linux-gnu. OK to apply on mainline?

Cheers,

Julian

ChangeLog (Daniel Jacobowitz):

     * gdb/dwarf2read.c (partial_read_comp_unit_head): Accept version 3.

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Index: src/gdb/dwarf2read.c
===================================================================
--- src.orig/gdb/dwarf2read.c	2005-03-01 12:09:19.000000000 -0800
+++ src/gdb/dwarf2read.c	2005-03-07 06:00:16.000000000 -0800
@@ -1312,7 +1312,7 @@ partial_read_comp_unit_head (struct comp
 
   info_ptr = read_comp_unit_head (header, info_ptr, abfd);
 
-  if (header->version != 2)
+  if (header->version != 2 && header->version != 3)
     error (_("Dwarf Error: wrong version in compilation unit header "
 	   "(is %d, should be %d) [in module %s]"), header->version,
 	   2, bfd_get_filename (abfd));