RFC on PR77828 and internal units

[Steve Kargl]

On Tue, Oct 04, 2016 at 11:15:50AM +0200, Andre Vehreschild wrote:
> 
> On Mon, 3 Oct 2016 15:40:01 -0700
> Steve Kargl <sgk@troutmask.apl.washington.edu> wrote:
> 
> > On Mon, Oct 03, 2016 at 01:29:25PM -0700, Jerry DeLisle wrote:
> > > Please see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77828
> > > 
> > > The patch I posted clearly breaks ABI in the sense that it renames
> > > st_read and st_write to avoid calling a wrong library with the code
> > > compiled with Trunk (7.0)
> > > 
> > > Personally I am OK with this because it is a solid line in the sand.
> > >   
> > 
> > There are a number of PR's that require breaking the
> > library's ABI.  We've always punted the decision down the
> > road, but at some point the ABI is going to get broken.
> > I thought that a meta-bug report tracked the ABI breakage
> > PR's.  A quick scan of bugzilla titles did not have one
> > jump out at me.
> > 
> > Personally, I think we should bump the library's major
> > version number and start to introduce the long delayed
> > PR's.
> > 
> > Of course, I have little to no time to actuall fix
> > anything. :)
> > 
> 
> But do you by chance have a list of PRs, that require API version change, you
> can point out, even if incomplete?
> 
> Then I volunteer to introduce the meta-bug and collect them there.
> 

I finally remembered where to look.  Check

https://gcc.gnu.org/wiki/LibgfortranAbiCleanup

I believe that the cleanup is waiting on 

https://gcc.gnu.org/wiki/ArrayDescriptorUpdate

Much of the array descriptor work has been done in the
fortran-dev branch (by pault and tobias?).  Tobias merged
trunk into fortran-dev 13 days ago.  It is my understanding
that 90 to 95% of the work is completed.  The last 5-10%
is the hard part.



-- 
Steve