cmake:包含根目录？

Question

我正在尝试为我正在做的一个项目设置cmake，但是我有一个问题，我目前还不能解决。我的项目具有以下文件夹结构：

MotorEngine (root dir)
| CMakeLists.txt
| ThirdParty
|-| SDL2
|-|-| include (contains all header files for SDL2)
|-|-| lib
|-|-|-| x64
|-|-|-|-| SDL2.lib (the library file I need to link with)
| Source
|-| CMakeLists.txt
|-| main.cpp

根CMakeLists.txt文件：

cmake_minimum_required(VERSION 2.6)
project(MotorEngine)

# Set an output directory for our binaries
set(BIN_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Binaries)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/Binaries)
set(THIRDPARTY_PATH ${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty)

# Include SDL2
include_directories(${THIRDPARTY_PATH}/SDL2/include)

# Add the engine + third party subdirectory
add_subdirectory(Source)

来源的CMakeLists.txt：

project(MotorEngine)
add_executable(MotorEngine main.cpp)
target_link_libraries(MotorEngine ${THIRDPARTY_PATH}/SDL2/lib/x64/SDL2.lib)

现在，我想实现以下目标，在我想要编写的main.cpp中

#include "SDL2/include/SDL2.h"

但目前我不得不写

#include "SDL2.h"

因为稍后会有同名的文件，所以我需要在它们的文件夹中区分它们。因此，最简单的方法是添加"ThirdParty“文件夹作为根目录，这样我就可以使用与此相关的#include，但要做的是

include_directories(${THIRDPARTY_PATH})

不起作用。有什么想法吗？谢谢!

Answer 1

在k.v.的帮助下，我能够解决这个问题。我需要在源目录的CMakeLists.txt中添加以下内容：

target_include_directories(MotorEngine PUBLIC ${THIRDPARTY_PATH})