Bug#857182: Please disable MMX and SSE support on i386

Sebastian Ramacher sramacher at debian.org
Wed Mar 8 16:59:20 UTC 2017

Control: tags -1 + moreinfo

On 2017-03-08 17:48:33, Laurent Bigonville wrote:
> Source: directfb
> Version:
> Severity: serious
> Hi,
> I see in the build logs of the i386 architecture that SSE and MMX
> instructions are enabled. This is not supported in debian. I see that
> this was enabled in the past but the flag got lost during the conversion
> to dh sequences.
> This must be disabled on i386. On amd64 this can be kept enable as SSE2 is
> supported.

As far as I can tell support for MMX is checked during runtime and the non-MMX
code path is taken if not available. SSE is not used at all.

So unless you can spot some part where it is used unconditionally, this isn't a

Sebastian Ramacher
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