CMake的如何正确地创建目标之间的依赖关系 [英] CMake how to correctly create dependencies between targets

问题描述

我想使用的CMake建立一个C ++项目，它使用的库之间的一些简单的依赖关系。

的设置如下：

• 项目
  
  
  
  • 依赖
  
  

项目本身包含的源文件，其中包括从依附头和可执行文件时建造它需要对依赖的静态库链接。

到目前为止，我能得到这个工作，但我有手动项目的CMakeLists文件来指定依赖的include目录。我想这自动复杂得多拉出来，我已经探讨使用find_package（的选择）命令有限的成功，这样做，使事情。

所有我想要做的是有相关性项目前建成并具备对库项目链接，并拥有包括目录，是否有实现这一目标的一个简单简洁的方式？

我目前cmake的文件：

项目，的CMakeLists.txt：

  cmake_minimum_required（版本2.6）
项目（项目）
include_directories（$ {} PROJECT_SOURCE_DIR /项目）
add_subdirectory（依赖）
add_executable（项目main.cpp中）
target_link_libraries（项目依赖）
add_dependencies（项目依赖）
 

依存关系的CMakeLists.txt

 项目（依赖）
add_library（依赖SomethingToCompile.cpp）
target_link_libraries（依赖）
 

解决方案

由于 CMake的2.8.11 您可以使用 target_include_directories 。只需简单地在你的依赖项目中添加这一功能，并填写包括要在主体工程看目录。 CMake的会照顾的其余部分。

项目，的CMakeLists.txt：

  cmake_minimum_required（VERSION 2.8.11）
项目（项目）
include_directories（项目）
add_subdirectory（依赖）
add_executable（项目main.cpp中）
target_link_libraries（项目依赖）
 

依存关系的CMakeLists.txt

 项目（依赖）
add_library（依赖SomethingToCompile.cpp）
target_include_directories（PUBLIC依赖包括）
 

I am trying to use CMake to set up some simple dependencies between a C++ project and the libraries that it uses.

The set up is as follows

• Project
  • Dependency

Project itself contains source files that include headers from Dependency and when the executable is built it needs to be linked against Dependency's static library.

So far I can get this to work but I have to specify the include directories of Dependency in the CMakeLists file for Project manually. I want this to be pulled out automatically and I have explored the option of using the find_package() command to do so with limited success and making things much more complicated.

All I want to do is have Dependency built before Project and have Project link against the library and have its include directories, Is there a simple concise way of achieving this?

My current cmake files:

PROJECT, CMakeLists.txt:

cmake_minimum_required (VERSION 2.6)
project (Project)
include_directories ("${PROJECT_SOURCE_DIR}/Project")
add_subdirectory (Dependency)
add_executable (Project main.cpp)
target_link_libraries (Project Dependency)
add_dependencies(Project Dependency)

DEPENDENCY, CMakeLists.txt

project(Dependency)
add_library(Dependency SomethingToCompile.cpp)
target_link_libraries(Dependency)

解决方案

Since CMake 2.8.11 you can use target_include_directories. Just simply add in your DEPENDENCY project this function and fill in include directories you want to see in the main project. CMake will care the rest.

PROJECT, CMakeLists.txt:

cmake_minimum_required (VERSION 2.8.11)
project (Project)
include_directories (Project)
add_subdirectory (Dependency)
add_executable (Project main.cpp)
target_link_libraries (Project Dependency)

DEPENDENCY, CMakeLists.txt

project (Dependency)
add_library (Dependency SomethingToCompile.cpp)
target_include_directories (Dependency PUBLIC include)

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