[Ffmpeg-devel] build broken again...

[Måns Rullgård]

Daniel Serpell <daniel_serpell at yahoo.com> writes:

> Hi!
>
> El Mon, May 09, 2005 at 11:46:39PM +0200, M?ns Rullg?rd escribio:
>> 
>> A non-PIC library, as the name implies, must be loaded a specific
>> address in memory.  The first time it is mapped, a text relocation
>> might fix the problem, but if another application needs the same
>> library, and already has mapped something else at that location, there
>> is nothing to be done, except making a new copy.
>
> Ah, seems you don't remember the "a.out" times, when distributions had
> to select non-overlaping address ranges to the libraries, so each copy
> could be shared. Common libraries had their addresses universally
> assigned.

I've seen attempts at such schemes in several old Unix versions.  In
addition to being inconvenient, it is bound to fail if the total size
of all libraries (on one system) should exceed the address space size.

> And you know, in that times userspace Linux was faster and smaller ;-) 

Perhaps it used less clock cycles, but the overall speed was still
slower, and perhaps it was smaller, but it did less things.  You
didn't run KDE on your a 386, you ran something like fvwm.

-- 
M?ns Rullg?rd
mru at inprovide.com