CMake虚拟目标取决于其他目标

Question

我有一个3 ^次方项目提供了许多库(假设只有头的库).我想为这个项目编写一个CMake封装:

文件 foo.cmake

add_library(          foo-aaa INTERFACE IMPORTED GLOBAL)
set_target_properties(foo-aaa PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/aaa/inc)

add_library(          foo-bbb INTERFACE IMPORTED GLOBAL)
set_target_properties(foo-bbb PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/bbb/inc)

add_library(          foo-ccc INTERFACE IMPORTED GLOBAL)
set_target_properties(foo-ccc PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/ccc/inc)

add_library(          foo-ddd INTERFACE IMPORTED GLOBAL)
set_target_properties(foo-ddd PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/ddd/inc)

add_library(          foo-eee INTERFACE IMPORTED GLOBAL)
set_target_properties(foo-eee PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/eee/inc)

[...] And many more

# For convenience I also want to provide 
# a global/dummy target depending on all above libraries
add_library( foo ????? )

主要 CMakeLists.txt

cmake_minimum_required(VERSION 3.1)
project(bar CXX)
include(path/to/3rdparty/foo/foo.cmake)
add_executable(bar bar.cpp)
target_link_libraries(bar foo)

问题:
如何编写foo依赖于所有其他目标的虚拟目标？

Answer 1

假设您不希望包含所有库的库，则可能需要这样做：

add_custom_target( foo )
add_dependencies( foo foo-aaa foo-bbb foo-ccc )

Answer 2

在写问题时，我得到了答案。我的解决方案是一个没有 INCLUDE_DIRECTORIES 的 INTERFACE 目标。

add_library(foo INTERFACE)
target_link_libraries(foo foo-aaa foo-bbb foo-ccc foo-ddd foo-eee [...])

希望这个答案可以帮助某人。