[FFmpeg-devel] [PATCH] mipsen require compilation with -DPIC since gcc-4.3

Luca Barbato lu_zero
Sun Sep 21 18:13:18 CEST 2008

M?ns Rullg?rd wrote:
> If it used to work, and now has stopped working, there has to be a bug
> somewhere.  Since FFmpeg didn't change, the bug must be in gcc.

Or gcc was doing something nonstandard and now it is disallowing it.

>>> In general, we avoid bug
>>> workarounds that have a negative performance impact, and PIC code
>>> certainly is slower than non-PIC on MIPS, at least when using gcc.
>> Given the number of registers mips has, I'm not so sure, Reinhard could 
>> you please provide a benchmark?
> I'm talking about the extra indirection imposed by PIC.

Still, if the benchmark show that the change doesn't hinder performance 
we could just stop this discussion.

> There is no reason for MIPS to not support textrels in shared libs.

There is a reason why it should?

> The mention of gcc 4.3 suggests that gcc has started doing something
> stupid, which should be reported as a bug.

I'm not even sure I want to build a cross compiler just to try to 
reproduce it...

Anybody with a mips box could please chip in and tell us?



Luca Barbato
Gentoo Council Member
Gentoo/linux Gentoo/PPC

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