[mythtv-users] compiling trunk on f20/qt4

[Jean-Yves Avenard]

On 12 September 2014 20:57, John Pilkington <J.Pilk at tesco.net> wrote:

> I just added a reference to JYA's comment here to another thread on the dev
> list about building rpms, but I suspect another comment _is_ appropriate.
> configure will only detect the capabilities of the processor if it's running
> on the target machine.  Otherwise, as in the case when a specfile is used to

no, because only the target matters here (i386, amd64 etc)...
Even if you compile on a machine with SSE2 only, the SSE4 code is
still generated and will be used at runtime when required

IMHO, trying to tweak CPU options in these days is pointless, and
rarely yield the desired effect.