Fix CMake warnings locally and when fetching tree-gen from another project #17
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libqasm builds were raising a warning when fetching tree-gen. I hope that warning gets fixed by specifying
LANGUAGES
atproject(tree-gen)
.Also, when configuring tree-gen locally via CMake, there were a few warnings when setting variables with
PARENT_SCOPE
. I have guarded those settings so they are only made if we are not configuring locally.