-add_executable(spawn_simulator ${PROJECT_DIRECTORY}/examples/gras/spawn/_spawn_simulator.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_father.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_child.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_common.c)
-add_executable(spawn_child ${PROJECT_DIRECTORY}/examples/gras/spawn/_spawn_child.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_child.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_common.c)
-add_executable(spawn_father ${PROJECT_DIRECTORY}/examples/gras/spawn/_spawn_father.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_father.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_child.c ${PROJECT_DIRECTORY}/examples/gras/spawn/spawn_common.c)
+add_executable(spawn_simulator ${CMAKE_CURRENT_BINARY_DIR}/_spawn_simulator.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_father.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_child.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_common.c)
+add_executable(spawn_child ${CMAKE_CURRENT_BINARY_DIR}/_spawn_child.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_child.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_common.c)
+add_executable(spawn_father ${CMAKE_CURRENT_BINARY_DIR}/_spawn_father.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_father.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_child.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/spawn_common.c)