[openib-general] Re: [PATH] problem dlopen libibverbs.so

[Gleb Natapov]

On Wed, Jul 20, 2005 at 05:57:28PM +0300, Michael S. Tsirkin wrote:
> Quoting r. Gleb Natapov <glebn at voltaire.com>:
> > Subject: Re: [PATH] problem dlopen libibverbs.so
> > 
> > On Wed, Jul 20, 2005 at 05:24:22PM +0300, Michael S. Tsirkin wrote:
> > > Quoting r. Gleb Natapov <glebn at voltaire.com>:
> > > > It appears that libmthca relies on back linking to find symbols from
> > > > libibverbs but back linking doesn't work in the later case.
> > > > 
> > > > I linked libmthca with libibverbs and this solved the problem.
> > > 
> > > I wander, however, what happends if you load libibverbs from path
> > > a, and mthca is linked with libibverbs from path b?
> > > Any idea?
> >
> > If two libibverbs are different it can fail or even crash I think.
> > This is the same as if libibverb tries to load libmthca compiled from
> > different svn revision.
> 
> May be a problem then: it might be quite hard to debug such crashes.
> 
Like any other problem caused by mismatched libraries.

> What about passing RTLD_GLOBAL to dlopen, instead?
The strange thing is it doesn't work, but it should according to man
page.

--
			Gleb.