Fix for #20408 - CMake LLVM_ENABLE_FFI=ON build fails on reconfigure

[Chandler Carruth]

I don't think so.

Dan, can you apply this since you LGTM'ed it? It's a part of our CMake I'm
not 100% familiar with.


On Sun, Aug 3, 2014 at 9:33 PM, Bill Wendling <isanbard at gmail.com> wrote:

> Is this in ToT?
>
> -bw
>
> On Jul 30, 2014, at 4:55 AM, Josh Klontz <josh.klontz at gmail.com> wrote:
>
> Ping. CC'ing code owner and release manager.
>
>
> On Wed, Jul 23, 2014 at 9:11 AM, Josh Klontz <josh.klontz at gmail.com>
> wrote:
>
>> Testing for the presence of FFI_INCLUDE_PATH cache variable is incorrect
>> if cmake is run a second time.
>>
>> Hopefully this can be applied to 3.5 branch as well. Thanks!
>> -Josh
>>
>
>
>
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