Andrew Schwartzmeyer commented on MESOS-7296:

I put this back to using {{TIMESTAMP}} in my WIP refactor because we're now 
updating to CMake 3.7.

> CMake 2.8.10 does not support TIMESTAMP
> ---------------------------------------
>                 Key: MESOS-7296
>                 URL: https://issues.apache.org/jira/browse/MESOS-7296
>             Project: Mesos
>          Issue Type: Bug
>          Components: cmake
>         Environment: Anywhere with CMake 2.x instead of 3.x (specifically 
> 2.8.10).
>            Reporter: Andrew Schwartzmeyer
>            Assignee: Andrew Schwartzmeyer
>            Priority: Trivial
>              Labels: build
> The patch https://reviews.apache.org/r/57052/ moved the build time and date 
> info out of compile definitions and into a build file. While testing, an 
> existent bug was discovered where the CMake command `string(TIMESTAMP 
> BUILD_TIME "%s" UTC)` is unsupported with CMake 2.8.10. Instead of replacing 
> the variable with the time, it replaces with with "%s".
> This is not a Linux vs Windows bug. This is specifically unsupported in 
> 2.8.10. Configuring with `cmake3` does not reproduce the bug.

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