如何配置cmake链接到预构建的共享库？ [英] How do I configure cmake to link to prebuilt shared libraries?
问题描述
我有一个项目，该项目在子目录中包含opencv的预构建版本。例如：
I have a project that includes a prebuilt version of opencv in a subdirectory. For example:
MyProject
* CMakeLists.txt
* src
* third_party
** CMakeLists.txt
** opencv
**** include
**** lib
MyProject
* CMakeLists.txt
* src
* third_party
** CMakeLists.txt
** opencv
**** include
**** lib
我想链接到third_party目录中的opencv版本。我的问题是，如何通知CMake链接到lib中的预构建dylib文件，并将标头包含在相关的opencv目录中？
I would like to link against the version of opencv located in the third_party directory. My question is, how do I inform CMake to link to the prebuilt dylib files in lib, and include the headers in the relevant opencv directory?
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 ${SOURCES})
target_link_libraries(myproject opencv_calib3d opencv_contrib opencv_core opencv_highgui opencv_features2d opencv_highgui opencv_imgproc)
推荐答案
我给出了您的示例在具有XCode 7.0.1的OS X 10.11上尝试使用CMake 3.3.2。
I've given your example a try with CMake 3.3.2 on OS X 10.11 having XCode 7.0.1.
使用 link_directories（） 和 target_link_libraries（） 方法似乎可以在不引发任何链接程序警告或错误的情况下工作（它找到。 dylib 库放置在 third_party 目录中。）
Using the link_directories() and target_link_libraries() approach suggested by @Tsyvarev seems to work without raising any linker warnings or errors (it finds the .dylib libraries I placed in the third_party directory).
只是一个视图提示，希望可以为您提供一个为什么Mac上无法使用它的开始。
Just a view hints, that hopefully could get you a start why it's not working on your Mac.
-
使用您的代码，我得到了以下命令行链接文件（在CMake的二进制输出目录中）：
With your code I get the following command line linker file (inside CMake's binary output directory):
CMakeFiles / myproject.dir / src / link.txt
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
-Wl,-search_paths_first
-Wl,-headerpad_max_install_names
CMakeFiles/myproject.dir/src/main.cpp.o -o myproject
-L[...CMAKE_SOURCE_DIR...]/third_party/opencv/lib
-lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_highgui -lopencv_features2d -lopencv_highgui -lopencv_imgproc -lopencv_features2d -lopencv_imgproc
-Wl,-rpath,[...CMAKE_SOURCE_DIR...]/third_party/opencv/lib
您可以尝试提供完整的库路径，因为这些由CMake本身及其附加检查更明显地体现了我所针对的内容。这是示例的修改版本：
You can try to give full library paths, because those are additionally checked by CMake itself and it gets more obvious what I link against. Here is a modified version of your example:
CMakeLists.txt
cmake_minimum_required(VERSION 2.8.9)
project (myproject)
include_directories(${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仅将完全限定的路径（相对于我的二进制输出目录）添加到链接器文件中。 -L 和 -l </ code>选项消失了，您会看到 line，例如：
With this CMake just adds fully qualified paths (relative to my binary output directory) into the linker file. The -L and -l options are gone and you get "lines" like:
../third_party/opencv/lib/libopencv_calib3d.dylib
其他Q / A参考
- OpenCV installation on Mac OS X
- How to use dylib file in application?
- CMake link_directories from library
- Force CMake to use the full library path
这篇关于如何配置cmake链接到预构建的共享库？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
