[Patch, gfortran] common blocks getting mangled in nested modules

[Paul Thomas]

Richard,

> My apologies if this is off the point and is obvious to all. But I 
> have run into people who forget parts of it - particularly the bit 
> about different instances of a common having different variable names. 
> And I run into a lot of people (including several on J3) who keep 
> forgetting that USE accessibility relates only to names and not to the 
> underlying objects. It seems safer to belabor the point than to 
> possibly let a misunderstanding propagate.

Apologies are certainly not necessary.  As it happens, I was well aware 
of this.  However, I have been reading the standard quite carefully to 
ensure compliance and have learned much that I did not know before.  
gfortran is less broken than it was but I am sharply aware of what 
remains to be done!

Cheers

Paul T