[cmake-developers] [CMake 0016082]: Support alternative download URL in ExternalProject_Add

[Brad King]

On 04/28/2016 03:13 PM, A. Klitzing wrote:
> -  message(FATAL_ERROR \"error: downloading '${remote}' failed
> +  message(WARNING \"downloading '\${url}' failed

Thanks for working on this!  Please revise the logic to collect
the list of failed URLs in a list and report an error listing
all URLs only after they all fail.  Otherwise once the source
moves all future builds will get warnings even though they
succeed on one of the alternatives.

Thanks,
-Brad