[patch] Fix glitch with DW_AT_MIPS_linkage_name

[Eric Botcazou]

Hi,

if a symbol is prefixed with '*', it will be assembled verbatim:

/* Output to FILE (an assembly file) a reference to NAME.  If NAME
   starts with a *, the rest of NAME is output verbatim.  Otherwise
   NAME is transformed in a target-specific way (usually by the
   addition of an underscore).  */

void
assemble_name_raw (FILE *file, const char *name)
{
  if (name[0] == '*')
    fputs (&name[1], file);
  else
    ASM_OUTPUT_LABELREF (file, name);
}

We use this in Ada for the Link_Name of pragma Export.  The problem is that 
the '*' is then emitted in the debug info:

        .long   .LASF9  # DW_AT_name: "pck__one_global_buffer"
        .byte   0x3     # DW_AT_decl_file (pck.ads)
        .byte   0xa     # DW_AT_decl_line
        .long   .LASF10 # DW_AT_MIPS_linkage_name: "*ONE_GLOBAL_BUFFER"

which confuses GDB.

Tested on i586-suse-linux, OK for mainline?


2010-06-06  Eric Botcazou  <ebotcazou@adacore.com>

	* dwarf2out.c (add_name_and_src_coords_attributes): Skip a leading '*'
	in the DW_AT_MIPS_linkage_name.


-- 
Eric Botcazou
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