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From: "laurent at guerby dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/46704] [4.6 Regression] Ada compiler fails to build itself
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46704

--- Comment #4 from Laurent GUERBY <laurent at guerby dot net> 2010-12-29 16:51:43 UTC ---
Look like .Ldebug_info0 symbol handling changed recently:

2010-11-13  Iain Sandoe  <iains@gcc.gnu.org>

    * dwarf2out.c (macinfo_entry): New struct.
    (output_comp_unit): Emit the section start label here and flag that we
    will emit an info section.
    (dwarf2out_start_source_file): Save data in a macinfo entry rather than
    emitting directly.
    (dwarf2out_end_source_file): Likewise.
    (dwarf2out_define): Likewise.
    (dwarf2out_undef): Likewise.
    (output_macinfo): New.
    (dwarf2out_init): Do not emit debug section switches here, allocate a
    vec for macinfo, when required.
    (dwarf2out_finish): First switch to debug_abbrev_section here.
    debug_line_section,  debug_macinfo_section, Likewise.
    Check that the pubtypes table has at least one unpruned entry before
    trying to emit it.