Re: Bits from dpkg developers - dpkg 1.16.1
On Mon, Oct 3, 2011 at 3:02 PM, Florian Weimer <fw@deneb.enyo.de> wrote:
> * Adam Borowski:
>
>>> I would defend static libs for scientific apps. Static libs show a
>>> significant performance benefit (2-40%, median around 5-10% but sometimes
>>> far more with C++ apps) and so are standard in HPC still;
>>
>> If you see that big a difference, you do a lot of cross-file calls in
>> tight loops.
>
> Not necessarily. -fPIC and -fPIE force calls to global functions
> defined in the same translation unit to go through the PLT. They
> aren't translated to direct IP-relative calls. For -fPIC, this is
> required by the ELF specification (no kidding, this might seem strange
> today).
Could we add a gcc flag and be non conformant ? I suppose it is only
for using LD_PRELOAD.
Bastien
>
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