Re: [Qemu-devel] [RFC] New device API

[malc]

On Sat, 9 May 2009, Anthony Liguori wrote:

> Paul Brook wrote:
> > On Wednesday 06 May 2009, Paul Brook wrote:
> >   
> > > > > The attached patch is my attempt at a new internal API for device
> > > > > creation in qemu.
> > > > >         
> > > > Instead of recreating constructors, I think we should just use GCC's
> > > > constructor attribute.  This gives us ordering which will be important
> > > > when dealing with buses.
> > > >       
> > > The reason I'm not using constructors is because you have to workaround
> > > ordering issues. All constructors are run before main(), so there's a very
> > > limited amount they can actually do, and constructor priorities are not
> > > available on all hosts.
> > >     
> > 
> > Oh, the other thing is that constructors don't work when you put objects in
> > a static library.  You need am explicit dependency to pull in objects.
> >   
> 
> Not if you enable -Wl,--whole-archive.  It ends up looking like:
> 
> gcc -o test-stub -g -Wall -O test-stub.c -Wl,--whole-archive libtest.a
> -Wl,--no-whole-archive -L.
> 
> And I've confirmed this works.

-Wl,--whole-archive means QEMU can only be built with GNU ld.

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