Long symbol names (Was: demangle doesn't work with...)

[David Nadlinger]

On Tuesday, 28 May 2013 at 19:01:00 UTC, Steven Schveighoffer 
wrote:
> Nothing is breakage before shared library support is ready.  
> And it's almost ready...

This comment makes me slightly nervous, as I think even then, we 
shouldn't be too quick to commit to ABI stability. Quite on the 
contrary, we need to make sure to aggressively tell users that 
they can't expect two pieces D code that were not compiled with 
the exact same compiler version to interoperate.

One of the reasons is that we keep breaking ABI compatibility in 
Phobos with just about every single release.

And the more important and fundamental one is that we don't 
actually have a well-defined ABI right now (i.e. that is actually 
documented in the spec), which would also need to be actually 
implementable by all of DMD, GDC and LDC. Not to mention the many 
quirks and bugs in the current implementation.

David