Re: [rfa:doco] Zap mi1 reference

[Andrew Cagney <cagney@gnu.org>]

> On Fri, Feb 13, 2004 at 03:05:06PM -0500, Andrew Cagney wrote:
> 
>> Hello,
>> 
>> This removes a reference to "mi1" in the documentation.  It's no longer 
>> tested (hence 'supported').
> 
> 
> I don't really know how I feel about dropping support for old mi
> versions. Is that the plan for future versions of mi?

Well, neither can GDB support broken parts of the interface indefinitly :-(

The vague intent is to slowly phase in fixes while at the same time 
phasing out the testing and eventually the code for the old interfaces. 
  This should give a separate ui writer a year or so of grace with any 
specific MI version.

This goes with the assumption that separate UI authors are qualifying 
their interface against a specific GDB/MI version.

> I think the MI functions should be backwards compatible. Are they?

Theory or reality?  In theory the output is largely upward compatible - 
code can discard unrecognized fields.  In reality warts eventually start 
to appear.  For instance, both:
- using frame ID's with varobj
- N:M breakpoints
will impact significantly on the MI interface.

Andrew