c++ - CMake 错误 : 'target is not built by this project'

Question

我的 CMakeLists.txt 文件是:

cmake_minimum_required(VERSION 3.7)
project(OpenCV_Basics)

set(CMAKE_CXX_STANDARD 11)

set(SOURCE_FILES main.cpp)

find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_LIBS})
target_link_libraries(OpenCV_Basics )

add_executable(OpenCV_Basics ${SOURCE_FILES})

当我尝试编译 main.cpp 时，我卡住了。

CMake Error at CMakeLists.txt:10 (target_link_libraries):
  Cannot specify link libraries for target "OpenCV_Basics" which is not 
built
  by this project.

怎么了？

我在 Mac 上使用 Clion。

Answer 1

add_executable 定义了一个目标，但是在您的代码中，您在尝试编译它之后定义了一个目标。

只需改变这两行的位置:

• 先定义目标

• 链接库。

像这样

add_executable(OpenCV_Basics ${SOURCE_FILES})
target_link_libraries(OpenCV_Basics )