[tree-ssa] Bootstrap fails with undefined reference to find_reachable_lable

[Tim Josling]

>> - Restructure the c-* code and the back end to make a clean interface
> 
> Which is what GIMPLE effectively does (give you a clean interface from frontend to middle/backend), and since we are talking about the tree-ssa branch, you have GIMPLE.
> 
> You can simply generate GIMPLE trees directly from treelang, and be done with it.
> If it doesn't work when you do this, something is broken, right Diego?
> 
> The G95 guys are using GIMPLE for their interface, too, aren't they?
> 
> 
>> Option 3 is the *right thing* but it is a huge job, particularly without having a mindset change about GCC being a C compiler. I am also of the view that any attempt by me to do this would not succeed and I have other priorities.
> Apparently you haven't been following tree-ssa.
> 
> 

This sounds like very good news. I was aware of tree-ssa but not sure 
its status.

Normally I make changes when something makes it into the mainline. Is 
that a bad idea in this case? In the meantime is there any documentation?

Tim Josling