[CMake] ExternalProject can't have interface library as a dependency

[Andrey Pokrovskiy]

> That sounds odd. What provides it as an INTERFACE library?

Me :) I created that target with add_library(openssl INTERFACE).

I think I better ask the same question on dev list, since it's mostly
details of get_property() implementation.

On Sat, Apr 18, 2015 at 2:32 AM, Stephen Kelly <steveire at gmail.com> wrote:
> Andrey Pokrovskiy wrote:
>
>> /* I'm using cmake-3.2.20150331-gb190c. */
>>
>> I have a following construction:
>>
>> ExternalProject_Add(
>>         websockets_ep
>>         DEPENDS ev openssl
>>         ...)
>>
>> But it so happened, that "openssl" is a INTERFACE library.
>
> That sounds odd. What provides it as an INTERFACE library?
>
>
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ
>
> Kitware offers various services to support the CMake community. For more information on each offering, please visit:
>
> CMake Support: http://cmake.org/cmake/help/support.html
> CMake Consulting: http://cmake.org/cmake/help/consulting.html
> CMake Training Courses: http://cmake.org/cmake/help/training.html
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/cmake