Best way to include a header generated with configure_file

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Hi there,

In a few packages, especially when porting third-party software to catkin, I encounter the problem of auto-generated headers. In a single-package scenario, it is pretty easy to handle, as I just have to play with include_directories() and the matter is settled. As for the install space, an appropriate install() rule easily takes care of it. Things get more complicated when dealing with devel space. For example, I would like my fooConfig.cmake to contain a link to the devel space include folder, that would contain the header generated from a template with configure_file(), for example. The same goes with pkg-config files.

I looked around and could not find any documentation or best practices on the matter. So far, I have tested adding a cmake/foo-extras.cmake.in file like the following:

if(@DEVELSPACE@)
  list(APPEND @PROJECT_NAME@_INCLUDE_DIRS @CATKIN_DEVEL_PREFIX@/include)
endif()

and then in my CMakeLists.txt I have something akin to this:

catkin_package(
  CFG_EXTRAS foo-extras.cmake
)

set(devel_pkg_inc ${CATKIN_DEVEL_PREFIX}/include/${PROJECT_NAME})

configure_file(foo.h.in ${devel_pkg_inc}/foo.h)
install(FILES ${devel_pkg_inc}/foo.h DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION})

It does the job for me, but it looks a bit clunky. Is there any catkin-ish way of doing this? Am I missing anything obvious?