CMakeLists.txt - nested source directory

CMakeLists.txt

set(PROJECT_NAME libhello)
set(PROJECT_INCLUDES inc_deps include)
set(PROJECT_SRC src/hello.cpp)

cmake_minimum_required(VERSION 3.0)
set(CMAKE_CXX_STANDARD 14)
project(${PROJECT_NAME} LANGUAGES CXX)


# exports ==============================================================================================================
foreach (inc_dir ${PROJECT_INCLUDES})
    set(${PROJECT_NAME}_INCLUDES ${${PROJECT_NAME}_INCLUDES} ${CMAKE_CURRENT_SOURCE_DIR}/${inc_dir})
endforeach(inc_dir)

foreach (src ${PROJECT_SRC})
    set(${PROJECT_NAME}_SRC ${${PROJECT_NAME}_SRC} ${CMAKE_CURRENT_SOURCE_DIR}/${src})
endforeach(src)

set(${PROJECT_NAME}_INCLUDES ${${PROJECT_NAME}_INCLUDES} PARENT_SCOPE)
set(${PROJECT_NAME}_SRC ${${PROJECT_NAME}_SRC} PARENT_SCOPE)
# exports ==============================================================================================================


include_directories(${PROJECT_INCLUDES})

message(STATUS "== => ${PROJECT_NAME} is loaded")
message(STATUS "          Exported ${PROJECT_NAME}_INCLUDES: ${${PROJECT_NAME}_INCLUDES}")
message(STATUS "          Exported ${PROJECT_NAME}_SRC: ${${PROJECT_NAME}_SRC}")