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This reverts commit 5abfde6c . The behaviors associated with implicit pulldown on variable lookup seriously conflict with the optimizations made in these commits. Basically, since values were copied upon variable lookup, not just on PARENT_SCOPE, coupled with PARENT_SCOPE's behavior based on whether the variable is in the current scope or not causes serious problems with not storing a value for every variable at every scope. The commit changed behavior of the following example, among other cases: function(test_set) set(blah "value2") message("before PARENT_SCOPE blah=${blah}") set(blah ${blah} PARENT_SCOPE) message("after PARENT_SCOPE blah=${blah}") endfunction() set(blah value1) test_set() message("in parent scope, blah=${blah}") Reported-by: Alex Merry <alex.merry@kde.org> Reported-by: Ben Cooksley <bcooksley@kde.org>
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