[CMake] [Q] howto merge include dirs from dependencies?

[Kishore]

On Wednesday 01 Sep 2010 5:17:56 pm Paweł Sikora wrote:
> Dnia 01-09-2010 o 13:08:59 Michael Wild <themiwi at gmail.com> napisał(a):
> 
> >
> > On 1. Sep, 2010, at 12:36 , Paweł Sikora wrote:
> >
> >> hi,
> >>
> >> i'm thinking about migration my custom makefiles for very large
> >> project to cmake system and generally have a one problem.
> >>
> >> e.g. i have a library (mylib) and a binary (coreApp) placed
> >> in subdirectiories with one top-level cmakelists.txt:
> >>
> >>
> >> top-level dir:
> >> CMakeLists.txt { cmake_minimum_required (VERSION 2.6) add_subdirectory  
> >> (core) add_subdirectory (mylib) }
> >> core
> >> mylib
> >>
> >> ./core subdir:
> >> CMakeLists.txt { add_executable (coreApp main.cpp)  
> >> target_link_libraries (coreApp mylib) }
> >> main.cpp
> >>
> >> ./mylib subdir:
> >> CMakeLists.txt { include_directories (h) add_library (mylib SHARED  
> >> mylib.cpp) }
> >> h
> >> mylib.cpp
> >>
> >> ./mylib/h:
> >> mylib.hpp
> >>
> >> for mylib build i'm adding the "h" subdir with interface headers
> >> but i need the mylib/h include path also for coreApp build.
> >> is there a simply way to pull include dirs from dependencies?
> >
> > Put include_directories(mylib/h) into the top-level CMakeLists.txt.
> 
> naturally but include_directories() in top-level cmakelists.txt is quite
> hard to maintance for live project with few levels of hierarchy and  
> hundreds
> of shared components. implicit include-dirs pulling from dependencies
> to current build target would be great.
> i wondering is it possible to do it with some kind of properties?

Maybe something like this can help?
toplevel/CMakeLists.txt:
add_subdirectory(mylib)
get_directory_property(MYLIB_INCLUDE_DIRS DIRECTORY mylib INCLUDE_DIRECTORIES)
-- 
Cheers!
Kishore