#
# This file models a directory hierarchy:
#
# libfoo/
#   core/
#   rpc/
#     client/
#     server/
#
# I want to link the whole thing together into a single libfoo.so. At each
# directory in the hierarchy, I want to use $<TARGET_OBJECTS:${child}> to
# bundle together objects from child directories.
#
# Currently, CMake only allows the $<TARGET_OBJECTS> mechanism to work over
# one level; I need to use some other mechanism to bundle up the objects from
# rpc/client and rpc/server into the rpc OBJECT library.
#
# What I want to be able to do (and what my patch allows) is:
#


## libfoo/CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
#add_subdirectory(core)
#add_subdirectory(rpc)
file(WRITE top.c "void top_level_function() {}")
add_library(foo SHARED top.c $<TARGET_OBJECTS:core> $<TARGET_OBJECTS:rpc>)


## libfoo/core/CMakeLists.txt
file(WRITE some_application_logic.c "void application_logic() {}")
add_library(core SHARED OBJECT some_application_logic.c)


## libfoo/rpc/CMakeLists.txt
#add_subdirectory(client)
#add_subdirectory(server)
file(WRITE rpc.c "void common_rpc_code() {}")
add_library(rpc SHARED OBJECT
	rpc.c
	$<TARGET_OBJECTS:client>
	$<TARGET_OBJECTS:server>
)


## libfoo/rpc/client
file(WRITE client_stubs.c "void client_stub() {}")
add_library(client SHARED OBJECT client_stubs.c)


## libfoo/rpc/server
file(WRITE server_stubs.c "void server_stub() {}")
add_library(server SHARED OBJECT server_stubs.c)