Debugging and PR87352

[Thomas Koenig]

Hi Jeremy,


> As I've hit a number of gfortran bugs (PR87542 and probably PR56471 when 
> I tried to workaround it), I thought I would dig into the source code of 
> gfortran. It's quite difficult to debug given the complex structures 
> which are passed around. Are there any functions to print some of the 
> gfc_ structures, e.g. gfc_symbol, gfc_expr, gfc_namespace, gfc_code...?

For just this case, there is a short article on the gcc wiki:

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

If you would like to have additional functions for debugging
gfortran data structures, just give us a heads-up - those are
quite easy to add, and do not impact user code.

Hope this helps, please do not hesitate to ask again if you need
anything.

(If you're developing a patch, have you considered getting a copyright
assignment?  We need that to incorporate "large" changes, but there
is of course room for interpretation of what that means).

Regards

	Thomas