Re: [Clamav-users] help, can't compile clamav-0.92 ("gcc bug…

exo dia wrote:
> Hi!
>
> We are using Ubuntu 6.06 LTS (Dapper Drake) on x86 boxes, and 6.06 uses gcc
> 4.0.3...and as such, we cannot compile the new clamav-0.92:
>
> checking for a supported version of gcc... ok (4.0.3)
> checking for gcc bug PR27603... ok, bug not present
> checking for gcc bug PR28045... configure: error: your compiler has gcc
> PR28045 bug, use a different compiler, see
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28045
>
> How do you "use a different compiler"? gcc 4.0.3 is what 6.06 LTS
> provides...I don't know how to change this (??).
>
If you can't upgrade to a newer gcc, you can also use an older gcc that
doesn't have this bug:
Ubuntu 6.06 LTS provides gcc-3.4:
http://packages.ubuntu.com/dapper/devel/gcc-3.4

# apt-get install gcc-3.4

> If I were to disable compiler optimizations in the clamav build, could I
> work around this bug in gcc 4.0.3? Which clamav file(s) have a problem with
> this bug?
>
See clamav bug #613: https://wwws.clamav.net/bugzilla/show_bug.cgi?id=613

The source code does specific bounds checks that this compiler
incorrectly removes.
If you compile ClamAV with a compiler that fails either of the 3 gcc bug
tests in configure,
the resulting binary may be subject to a buffer-overflow.

Best regards,
--Edwin

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