Question

我有一个项目，在子目录中包含opencv的预构建版本。例如：

MyProject的
* CMakeLists.txt
* src
* third_party
** CMakeLists.txt
** opencv
****包括
**** lib

我想链接到位于third_party目录中的opencv版本。我的问题是，如何通知CMake链接到lib中预先构建的dylib文件，并在相关的opencv目录中包含标题？

cmake_minimum_required(VERSION 2.8.9)
project (myproject)

include_directories(${CMAKE_SOURCE_DIR}/third_party/opencv/include)
link_directories(${CMAKE_SOURCE_DIR}/third_party/opencv/lib)

file(GLOB SOURCES "*.cpp")

add_executable(myproject ${SOURCES})
target_link_libraries(myproject opencv_calib3d opencv_contrib opencv_core opencv_highgui opencv_features2d opencv_highgui opencv_imgproc)

Answer 1

我已经在具有XCode 7.0.1的OS X 10.11上尝试了CMake 3.3.2。

使用@Tsyvarev建议的link_directories()和target_link_libraries()方法似乎可以在不引发任何链接器警告或错误的情况下工作（它找到我放在.dylib中的third_party库目录）。

只是一个视图提示，希望可以帮助您了解为什么它不适用于您的Mac。

使用您的代码，我得到以下命令行链接器文件（在CMake的二进制输出目录中）：

<强> CMakeFiles / myproject.dir / SRC / link.txt

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++    
-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk 
-Wl,-search_paths_first 
-Wl,-headerpad_max_install_names  
CMakeFiles/myproject.dir/src/main.cpp.o  -o myproject  
-L[...CMAKE_SOURCE_DIR...]/third_party/opencv/lib  
-lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_highgui -lopencv_features2d -lopencv_highgui -lopencv_imgproc -lopencv_features2d -lopencv_imgproc 
-Wl,-rpath,[...CMAKE_SOURCE_DIR...]/third_party/opencv/lib

您可以尝试提供完整的库路径，因为CMake本身会另外检查这些路径，并且它会更明显地链接到我的链接。以下是您的示例的修改版本：

<强>的CMakeLists.txt

cmake_minimum_required(VERSION 2.8.9)
project (myproject)

include_directories(${CMAKE_SOURCE_DIR}/third_party/opencv/include)

file(GLOB SOURCES "src/*.cpp")
file(GLOB LIBRARIES "third_party/opencv/lib/*.dylib")
message("LIBRARIES = ${LIBRARIES}")

add_executable(myproject ${SOURCES})
target_link_libraries(myproject ${LIBRARIES})

使用此CMake只需将完全限定的路径（相对于我的二进制输出目录）添加到链接器文件中。 -L和-l选项已消失，您将获得“行”，如：

../third_party/opencv/lib/libopencv_calib3d.dylib

其他Q / A参考

如何配置cmake链接到预建的共享库？

1 个答案: