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Re: GCC version bikeshedding


On Wed, Aug 06, 2014 at 12:33:42PM +0100, Joern Rennecke wrote:
> On 6 August 2014 11:31, Richard Biener <richard.guenther@gmail.com> wrote:
> > Ok, so the problematical case is
> >
> > struct X { std::string s; };
> > void foo (X&);
> 
> Wouldn't it be even more troublesome with an application that dynloads
> dsos depending on user input.
> The install script might check if the dso with the right soname is present,
> but then you still get dynamic linker errors when the user tries to
> do something with the application, which could be an arbitrary time after
> the upgrade.

Now, if you do the same with libstdc++.so.7, you have exactly the same issue
(need to think what you do with SONAMEs of libraries built with C++), but
furthermore whenever you get both libstdc++.so.6 and libstdc++.so.7 loaded
into the same process, most probably nothing will work at all, there will be
no mangling differences between so.6 and so.7 symbols, etc.

	Jakub


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