[CMake] find_package config mode question

[Mclendon, William C III]

Hi,

I'm trying to set up a project pulls in information from another CMake project (include dirs, libraries, etc.).  As I understand it the right thing to do is create a <Project>config.cmake.in in the source project and then use find_package in config mode to pull in the information to the dependent project.

So far things seem to be working properly but I'd like to pull the content of include_directories from the master project into the dependent project because it has to reference a few headers.  I haven't found any built in CMake variable that collects all the include_directory commands but I can do something like this:

get_property (dirs DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES)
foreach (dir ${dirs})
  message (STATUS "MyProject INCLUDE DIRECTORY: '${dir}'")
  list (APPEND MyProject_INCLUDE_DIRS ${dir})
endforeach ()
message( STATUS "MyProject_INCLUDE_DIRS: " ${MyProject_INCLUDE_DIRS} )

this seems to do the right thing and lists all the directories in include_directory() statements, but when I go to the MyProjectConfig.cmake.in file and have something like this:


set (MYPROJECT_INCLUDE_DIRS ${MyProject_INCLUDE_DIRS})

it doesn't get anything.  I have other statements in the MyProjectConfig.cmake.in file that have a similar pattern and are expanded but for this one I get something like this:


set (MYPROJECT_INCLUDE_DIRS )

I've used CMake for a while, generated a couple simple project scripts in the past but this is my first time developing a project using find_package in config mode.   Any suggestions would be helpful :)

Thanks!
  -William
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