[CMake] external projects and transitive dependencies

[Micha Hergarden]

Hi Brian,

ExternalProject_Add has a DEPENDS option. What you can do is let X
depend on Y and use the CMAKE_CACHE_ARGS option to provide the include
path, or use the buildsystem in project X to find the headers itself.

Regards,
Micha

On 03/19/2014 03:11 AM, Brian Lewis wrote:
> If X brings in Y as an external project, and Y brings in Z as an
> external project, is there some way for Y to communicate information
> about Z back to X, e.g., some include directory?
>
> My situation is, X doesn't know anything about Z, but needs to be able
> to find one of Z's headers. I wish I could add Y as an external project
> and then include_directories(${Y_INCLUDE_DIRS}).


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