无法找到Eigen3与CMake [英] Unable to find Eigen3 with CMake
问题描述
我有点绝望:
对于我的研究,我需要与Eigen和CMake一起工作。我可以使用Eigen如果我复制整个库在我的编译器看起来默认的目录,但一旦我试图找到它通过
find_package(Eigen3 REQUIRED)
我收到以下错误:
CMake错误在/ usr / share /模块/ FindPackageHandleStandardArgs.cmake:148(消息):
无法找到Eigen3(缺少:EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)
(必须至少是版本2.91.0)
调用堆栈调用第一个):
/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,发生错误!
现在我搜索解决方案,但我所有的那些在stackoverflow上可用:
查找包Eigen3 for CMake
或
CMake找不到Eigen3 )
没有工作。
我的特征版本(根据 Core / util / Macros.h
中的宏)是3.2.5。
我保留Eigen目录在 / usr / local / include
,我使用 FindEigen3.cmake
带有Eigen库,我的 CMakeLists.txt
如下所示:
cmake_minimum_required(VERSION 2.8)
project(Test)
set(CMAKE_MODULE_PATH $ {CMAKE_CURRENT_SOURCE_DIR})
find_package(Eigen3 REQUIRED)
包含目录($ {EIGEN3_INCLUDE_DIR})
消息(Found Eigen3 in:$ {EIGEN3_INCLUDE_DIR})
add_executable(main test.cpp)
有人知道发生了什么问题吗?
亲爱的,
Julien解决方案将我的评论转换为答案
find包脚本 - 如
FindEigen3.cmake
- 通常使用find_path()
命令来检测包的include目录(有关完整详情,请参见文档)。
FindEigen3.cmake
使用以下代码片段:
find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library
PATHS
$ {CMAKE_INSTALL_PREFIX} / include
$ {KDE4_INCLUDE_DIR}
PATH_SUFFIXES eigen3 eigen
)
=https://cmake.org/cmake/help/v3.4/variable/CMAKE_INSTALL_PREFIX.html =nofollow> CMAKE_INSTALL_PREFIX
其中默认情况下,Unix / Linux主机为 / usr / local
。
>
-
转到
Eigen
源目录并运行CMake和安装步骤
> mkdir build
> cd build
> cmake ..
> make install
-
然后复制 - 如你所做 -
FindEigen3。 cmake
到您的项目源目录。 -
现在您的代码确实找到
Eigen
(只是更改为...)
)列表(APPEND CMAKE_MODULE_PATH$ {CMAKE_CURRENT_SOURCE_DIR})
find_package(Eigen3 REQUIRED)
参考
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:
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
Could NOT find Eigen3 (missing: EIGEN3_INCLUDE_DIR EIGEN3_VERSION_OK)
(Required is at least version "2.91.0")
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
FindEigen3.cmake:76 (find_package_handle_standard_args)
CMakeLists.txt:8 (find_package)
-- Configuring incomplete, errors occurred!
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:
cmake_minimum_required(VERSION 2.8)
project(Test)
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
find_package(Eigen3 REQUIRED)
include_directories(${EIGEN3_INCLUDE_DIR})
message("Found Eigen3 in: ${EIGEN3_INCLUDE_DIR}")
add_executable(main test.cpp)
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:
find_path(EIGEN3_INCLUDE_DIR NAMES signature_of_eigen3_matrix_library PATHS ${CMAKE_INSTALL_PREFIX}/include ${KDE4_INCLUDE_DIR} PATH_SUFFIXES eigen3 eigen )
So it looks in CMAKE_INSTALL_PREFIX
which on Unix/Linux hosts is /usr/local
by default.
The following has worked for me:
Go to the
Eigen
source directory and run the CMake and installation steps> mkdir build > cd build > cmake .. > make install
Then copy - as you have done -
FindEigen3.cmake
to your projects source directory.Now your code does find
Eigen
(just changed tolist(APPEND ...)
)list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}") find_package(Eigen3 REQUIRED)
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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