[cmake-developers] Namespaces

[Stephen Kelly]

Pau Garcia i Quiles wrote:

> CMake should wrap every variable defined under the directory added with
> add_subdirectory(QtZeroConf NAMESPACE QTZEROCONF)

So, CMake needs to first determine what variables are used in the QtZeroConf 
directory (presumably without executing the cmake code there) and then wrap 
the variables, then execute the cmake code? 

I must be missing something. I don't think that's possible.

> 3rdparty/CMakeLists.txt contains ExternalProject_Add(QtZeroConf ...)
> 
> and
> 
> server/CMakeLists.txt contains find_package(QtZeroConf)

I think you need:

 ExternalProject_Add(3rdparty/Whatever ...)
 ExternalProject_Add(3rdparty/QtZeroConf ...)
 ExternalProject_Add(server ...)

and pass appropriate args to the latter, including where to look for 
dependencies etc (and dependencies among the ExternalProjects).

You might not like this solution, but as far as I know it is the only 
correct solution built into CMake.

Thanks,

Steve.