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Date: Mon, 12 Mar 2012 19:23:41 -0400
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From: Ryan Stone <rysto32@gmail.com>
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Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>
Subject: Re: hack.So: could not read symbols
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2012/3/12 Fernando Apestegu=EDa <fernando.apesteguia@gmail.com>:
> I'm using 9.0-RELEASE.
>
> I downloaded the snapshot "9.0-CURRENT-201012" and tried to build it's
> kernel but I get this error:
>
> hack.So: could not read symbols: File in wrong format
>
> file reports this:
>
> ELF 64-bit LSB shared object, x86-64, version 1 (FreeBSD), dynamically
> linked, not stripped
>
> I compared this file with the same file generated during the
> compilation of the 9.0-RELEASE GENERIC kernel and they are identical.
>
> What's the problem here?

I saw a similar issue trying to build a stable/8 kernel on
9.0-RELEASE.  Doing a make kernel-toolchain before make buildkernel
fixed the issue.