[CMake] 138% progress when building both all and not-in-all target?

[Ben Pope]

On Monday, June 23, 2014 08:38 PM, Brad King wrote:
> On 06/20/2014 04:24 AM, Ben Pope wrote:
>> I've also seen this using the Makefile generator, the bigger problem is
>> that it ends up building the dependencies of those targets in parallel,
>> if there is overlap, it may try to build the same target multiple times
>> simultaneously, which can obviously break the build
>
> This issue is recorded here:
>
>   http://www.cmake.org/Bug/view.php?id=14312
>
> It has been fixed for GNU make in CMake 3.0.

Awesome.  I suspect that if you build a set of targets often, it makes 
sense to add that set to a target to increase parallelism of the build.

But a quick fix that prevents breakage without regression is great.

Ben