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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug default/27368] [dwz, dwarf5] Handle .debug_macro version 5
Date: Mon, 08 Feb 2021 14:39:45 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27368

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

--- Comment #7 from Mark Wielaard <mark at klomp dot org> ---
The version check should be fine.
My preference would simply be version !=3D 4 && version !=3D5.

This should fine as is with GCC DWARF5 since:

    DW_MACRO_GNU_define =3D=3D              DW_MACRO_define
    DW_MACRO_GNU_undef =3D=3D               DW_MACRO_undef
    DW_MACRO_GNU_start_file =3D=3D          DW_MACRO_start_file
    DW_MACRO_GNU_end_file =3D=3D            DW_MACRO_end_file
    DW_MACRO_GNU_define_indirect =3D=3D     DW_MACRO_define_strp
    DW_MACRO_GNU_undef_indirect =3D=3D      DW_MACRO_undef_strp
    DW_MACRO_GNU_transparent_include =3D=3D DW_MACRO_import

That leaves:

    DW_MACRO_define_strx
    DW_MACRO_undef_strx

But those are never generated by GCC (see also DW_FORM_strx[1234] support).

dwz itself could generate (probably behind a --dwarf5 flag):

    DW_MACRO_define_sup
    DW_MACRO_undef_sup
    DW_MACRO_import_sup

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