CMake 虚拟目标取决于其他目标

Question

我有一个 3^rdparty 项目提供了许多库（比方说 header-only 库）。我想为这个项目写一个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：
如何编写依赖于所有其他目标的虚拟目标 foo？

Answer 1

在写问题时我得到了答案。我的解决方案是没有 INCLUDE_DIRECTORIES.

的 INTERFACE 目标

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

希望这个回答能对某人有所帮助。

Answer 2

假设您不想要一个包含所有库的库，您可能需要这个：

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

CMake 虚拟目标取决于其他目标

CMake dummy target depending on other targets

dependencies

cmake

target

文件foo.cmake

主要CMakeLists.txt

文件`foo.cmake`

主要`CMakeLists.txt`