[PATCH] Interpret DW_TAG_unspecified_type as void

[Julian Brown]

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.

This patch handles the C/C++ interpretation of the DWARF 3 construct 
DW_TAG_unspecified_type as void. This is used in representing e.g. 
pointer-to-void types. Other languages will currently be handled in 
exactly the same way; though I'm not entirely sure if that's a sensible 
default, I don't know what would be better. (Re: section 5.2 of the 
DWARF 3 doc.)

Tested natively on x86_64-unknown-linux-gnu and cross to arm-none-eabi 
with no change in results. Tests against the ARM compiler are improved 
somewhat.

OK to apply?

Cheers,

Julian

ChangeLog (Daniel Jacobowitz):

     * dwarf2read.c (read_unspecified_type): New function.
     (read_type_die): Handle DW_TAG_unspecified_type.
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