extra-cmake-modules: ECM_VERSION() macro

[Stephen Kelly]

Alexander Neundorf wrote:

> Hi,
> 
> in extra-cmake-modules we have a file ECMVersion.cmake, which contains a
> macro ecm_version().
> 
> This macro is not documented, and "ecm_version()" is not a good name for a
> function (or macro), since it doesn't contain a verb.
> 
> How is this macro intended to be used ?
> Is it intended to be "public" or is it used only internally ?
> 
> We have to be careful, once we ship a release we must keep compatibility.
> 
> Alex

Each framework uses it in the frameworks branch. The idea is to have a 
compact way to set the version which could be updated by scripty (as there 
may be many more places where the version needs to be updated on release)