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Date:      Mon, 12 Jun 2023 09:00:57 -0400
From:      Mark Johnston <markj@freebsd.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        dtrace@freebsd.org
Subject:   Re: ERROR: ctfconvert: rc = 1 Unsupported version [_dwarf_info_load(229)]
Message-ID:  <ZIcXCV9A5z3DNmqJ@nuc>
In-Reply-To: <3p0rs824-qo1q-pr8s-195r-51s22nrq3634@yvfgf.mnoonqbm.arg>

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On Sat, Jun 10, 2023 at 10:10:15PM +0000, Bjoern A. Zeeb wrote:
> Hi,
> 
> compiling with gcc I see a lot of:
> 
> ERROR: ctfconvert: rc = 1 Unsupported version [_dwarf_info_load(229)]
> 
> I wonder "Unsupported version" of what?  and can we improve it?

It's referring to the DWARF version.  Assuming you're compiling with
gcc12, the kernel build is emitting DWARF 5 by default, which our
libdwarf does not handle.  Earlier this year I worked on extending
libdwarf to support the new standard, at least well enough for
ctfconvert's purposes.  I'll try to get back to it shortly.


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