如何将cmake指向库的特定目录？ [英] How to point cmake at specific directory for library?

问题描述

我有一个CMake项目，我使用一个库，现在我想测试我的代码与该库的不同版本。我可以在下面的示例中设置INCLUDE_DIRECTORIES（可能还有以后也链接）。但是因为我只想临时这样做，我想手动设置这个路径与ccmake / cmake-gui。

如何做？

 没有下面的行，请：
 cmake_minimum_required（VERSION 2.8）
 
 find_package（OpenCV REQUIRED）
＃
 INCLUDE_DIRECTORIES（/ home / me / src / opencv / install / include）
 add_executable（min_example main.cpp）
 target_link_libraries（min_example $ {OpenCV_LIBS}）
  

CMAKE_PREFIX_PATH 变量，这应该是可能的。在您的项目目录中生成 test_build 目录并运行：

  mkdir test_build 
 cd test_build 
 cmake -DCMAKE_PREFIX_PATH = / home / me / src / opencv / install .. 
  

设置 CMAKE_PREFIX_PATH 变量将使 find_package（OpenCV REQUIRED）命令选择您的OpenCV安装 / home / me / src / opencv 并设置 OpenCV_LIBS 和 OpenCV_INCLUDE_DIR



或者，您可以使用CMake编辑现有构建目录的 CMakeCache.txt 文件GUI编辑器并添加 CMAKE_PREFIX_PATH 定义。您必须重新配置您的项目。

I have a CMake project where I am using a library and now I want to test my code with a different version of that library. I can set INCLUDE_DIRECTORIES (and possibly later also linking) in the below example. But because I only want to do this temporarily, I'd like to manually set this path with ccmake/cmake-gui.

How do I do this?

project(min_example)
cmake_minimum_required(VERSION 2.8)

find_package(OpenCV REQUIRED)
# Without the following line please:
INCLUDE_DIRECTORIES("/home/me/src/opencv/install/include")
add_executable(min_example main.cpp)
target_link_libraries(min_example ${OpenCV_LIBS})

解决方案

This should be possible by setting the CMAKE_PREFIX_PATH variable upon configuring your build. In your project directory generate a test_build directory and run:

mkdir test_build
cd test_build
cmake -DCMAKE_PREFIX_PATH=/home/me/src/opencv/install ..

Setting the CMAKE_PREFIX_PATH variable will make the find_package(OpenCV REQUIRED) command pick your OpenCV installation in /home/me/src/opencv and set the OpenCV_LIBS and OpenCV_INCLUDE_DIR variables accordingly.

Alternatively you can edit a CMakeCache.txt file of an existing build directory with the CMake GUI editor and add the CMAKE_PREFIX_PATH definition there. You have to re-configure your project then.

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