无法使用 CMake 找到 Eigen3
问题描述
我有点绝望:对于我的学习,我需要使用 Eigen 和 CMake.如果我将整个库复制到编译器默认查找的目录中,但一旦我尝试通过
找到它,我就可以使用 Eigenfind_package(Eigen3 REQUIRED)
我收到以下错误:
<代码>/usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake 处的 CMake 错误:148(消息):找不到 Eigen3(缺少:EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)(至少需要版本2.91.0")调用堆栈(最近调用优先):/usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)FindEigen3.cmake:76 (find_package_handle_standard_args)CMakeLists.txt:8 (find_package)-- 配置不完整,出现错误!
现在我搜索了解决方案,但都是我尝试过的(还有那些在stackoverflow上可用的:
查找 CMake 的 Eigen3 包或者CMake 找不到 Eigen3 )不工作.我的特征版本(根据 Core/util/Macros.h
中的宏)是 3.2.5.我将 Eigen 目录保存在 /usr/local/include
中,我使用了 Eigen 库附带的 FindEigen3.cmake
和我的 CMakeLists.txt
> 看起来如下:
<代码>cmake_minimum_required(版本 2.8)项目(测试)设置(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})find_package(需要Eigen3)包含目录(${EIGEN3_INCLUDE_DIR})message("在:${EIGEN3_INCLUDE_DIR} 中找到 Eigen3")add_executable(主测试.cpp)
有人知道出了什么问题吗?
亲切的问候,朱利安
将我的评论转化为答案
查找包脚本 - 如 FindEigen3.cmake
- 通常使用 find_path()
命令来检测包的包含目录(请参阅 它的文档 了解完整细节).
FindEigen3.cmake
使用以下代码片段:
所以它看起来在 CMAKE_INSTALL_PREFIX
在 Unix/Linux 主机上默认为 /usr/local
.
以下对我有用:
转到
Eigen
源目录并运行 CMake 和安装步骤然后复制 - 正如你所做的 -
FindEigen3.cmake
到你的项目源目录.现在您的代码确实找到了
Eigen
(只是更改为list(APPEND ...)
)
参考资料
- Eigen &CMake
- CMake:如果您仍然需要指定 CMAKE_MODULE_PATH,那么 find_package() 有什么用?
- Cmake 没有找到 Boost
I am kind of desperate:
For my studies I need to work with Eigen and CMake. I'm able to use Eigen if I copy the whole library in the directories where my compiler looks by default but as soon as I try to find it via
find_package(Eigen3 REQUIRED)
I get the following error:
Now I searched for solutions but all I those I tried (also those available on stackoverflow:
Find package Eigen3 for CMake
or
CMake Can't find Eigen3 )
did not work.
My Eigen Version (according to the Macros in Core/util/Macros.h
) is 3.2.5.
I keep the Eigen directory in /usr/local/include
, I use the FindEigen3.cmake
which comes with the Eigen library and my CMakeLists.txt
looks as follows:
Has anyone an idea what's going wrong?
Kind regards, Julien
Turning my comment into an answer
The find package scripts - like FindEigen3.cmake
- normally use the find_path()
command to detect the package's include directory (see it's documentation for the full details).
FindEigen3.cmake
uses the following code snippet:
So it looks in CMAKE_INSTALL_PREFIX
which on Unix/Linux hosts is /usr/local
by default.
The following has worked for me:
Go to the
Eigen
source directory and run the CMake and installation stepsThen copy - as you have done -
FindEigen3.cmake
to your projects source directory.Now your code does find
Eigen
(just changed tolist(APPEND ...)
)
References
- Eigen & CMake
- CMake: Of what use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
- Cmake doesn't find Boost
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