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Date: Tue, 15 Jan 2013 08:58:29 +0100
From: Dimitry Andric <dim@FreeBSD.org>
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To: Pedro Giffuni <pfg@FreeBSD.org>
Subject: Re: ctfconvert again
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On 2013-01-15 04:53, Pedro Giffuni wrote:
>> So I updated my FreeBSD machine to 9.1-RELEASE in the hope of getting
>> past the ctfconvert problem that causes a build of 10-CURRENT to say:
>>
>> ERROR: ctfconvert: failed to initialize DWARF: Unimplemented code at
>> [dwarf_init_attr(400)]
>>
>> while compiling every kernel source file.  Then I checked out head as
>> of 245422 into a different partition and tried "make buildworld" (ran
>> okay) and "make buildkernel" (failed with the same error as before).
>>
>> Do I have to build an early version of head before I can build the
>> current version of head?                          -- George Mitchell
>>
> FWIW;
>
> While looking at NetBSD's Dtrace enhancements I found that
> this is caused[1] by a known bug in gcc. It was fixed in our base gcc
> recently and MFC'd.
>
> Last time I looked, upstream gcc hasn't fixed it, and I am trying
> to get the illumos guys to review the NetBSD workaround before
> we adopt it.

No, this is most likely not a gcc issue.  I am fairly certain it is
fixed by commit r239872 to libdwarf, but as I noted in another reply,
this fix did not make it into 9.1-RELEASE.