[Bug fortran/43899] Wrong unused-variable warning with NAMELISTs

[jvdelisle at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43899

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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         AssignedTo|jvdelisle at gcc dot        |unassigned at gcc dot
                   |gnu.org                     |gnu.org

--- Comment #12 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> 2010-11-09 00:24:02 UTC ---
This latest patch gets rid of the bogus unused warning.  Remaining, but not
real important is to warn on an unused namelist.  I think this will involve
marking namelists as used when resolving or translating I/O statements and then
at some point, scan for any namelists not marked.  I almost think its not worth
it, but will leave this opened until others weigh in on it.

Even if a namelist is used, a particular variable within it may not be used. 
For example, if the users nml file does not contain an assignment for a
particular variable in the list, it will remain unused.  No value in the read
operation.