[CMake] ExternalProject: download step progress prints too much

[Luc J. Bourhis]

Using "include(ExternalProject)" with CMake 2.8, the download step echoes its
progress in my terminal as:


I am pretty sure the intended effect was a single line with the percentage
changing as the download progresses. But what is missing from my environment
to achieve that? I am running a stock Fedora 20.

Thanks in advance.



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Luc J. Bourhis

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