[Patch, fortran] PR29992 - failure to detect module procedures that are not procedures from modules

[Paul Thomas]

:ADDPATCH fortran:

This PR is simple enough in concept - gfortran fails to detect the 
invalid reference in module procedure declarations of procedures that 
are not contained by the interface scope or use associated.  The only 
difficulty was detecting if a procedure had been declared a module 
procedure in a generic interface.  The only way that I found to do this 
was to add a mod_proc attribute.  The attr.proc == PROC_MODULE applies 
to all procedures in modules.  Since the attribute is unique in its 
application to a module namespace, it is neither copied nor is it use 
associated.

The patch that was posted to the PR is too restrictive - it does not 
allow use associated procedures; so please ignore it.

Regtested on Cygwin_NT/amd64 - OK for trunk and 4.2?

Paul


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