如何在macOS中使用CMake使库找到Eigen？

Question

我正在尝试使用包含Ceres Solver库的CMake编译我的项目。 我正在将MacOS Sierra与Xcode 8.1开发工具一起使用。

我用Homebrew（brew install ceres-solver）安装了库。 我手动下载并测试了二进制文件（ http://ceres-solver.org/building.html#mac-os-x ），效果很好。 但是我无法将其包含在我自己的项目中，因为它似乎找不到Eigen。 这是一个完整的示例：

ceres-test / CMakeLists.txt：

cmake_minimum_required(VERSION 2.8)                                                                                            
project(CeresTest)                                                                                                             
find_package(ceres REQUIRED)                                                                                                   
add_executable(                                                                                                                
  TestCeres                                                                                                                    
  src/test_ceres.cpp                                                                                                           
)                                                                                                                              
target_link_libraries(                                                                                                         
  TestCeres                                                                                                                    
  ceres                                                                                                                        
)

ceres-test / src / test_ceres.cpp

#include <iostream>

#include "ceres/ceres.h"

int main(int argc, char** argv) {
  std::cout << "Works." << std::endl;
  return 0;
}

我如何编译它：

mkdir build
cd build
cmake ..
make

全输出：

me: ceres-test $ mkdir build
me: ceres-test $ cd build/

cmake

me: build $ cmake ..
-- The C compiler identification is AppleClang 8.0.0.8000042
-- The CXX compiler identification is AppleClang 8.0.0.8000042
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found required Ceres dependency: Eigen version 3.2.10 in /usr/local/include/eigen3
-- Found required Ceres dependency: Glog in /usr/local/include
-- Found Ceres version: 1.11.0 installed in: /usr/local
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/me/Tests/ceres-test/build

使

me: build $ make
Scanning dependencies of target TestCeres
[ 50%] Building CXX object CMakeFiles/TestCeres.dir/src/test_ceres.cpp.o
In file included from /Users/me/Tests/ceres-test/src/test_ceres.cpp:3:
In file included from /usr/local/include/ceres/ceres.h:37:
In file included from /usr/local/include/ceres/autodiff_cost_function.h:132:
In file included from /usr/local/include/ceres/internal/autodiff.h:145:
/usr/local/include/ceres/jet.h:165:10: fatal error: 'Eigen/Core' file not found
#include "Eigen/Core"
         ^
1 error generated.
make[2]: *** [CMakeFiles/TestCeres.dir/src/test_ceres.cpp.o] Error 1
make[1]: *** [CMakeFiles/TestCeres.dir/all] Error 2
make: *** [all] Error 2

我不知道该如何解决。 我在网上找到的所有解决方案都没有帮助。 CMake似乎发现Eigen库很好，所以我不确定如何添加它。

附带一提，我也不能直接包含“ Eigen / Core”，但是我能够编译的测试确实包含了它，而且还不错。 我不熟悉如何使用CMake处理这类问题。

编辑：如果将其包含为“ eigen3 / Eigen / Core”，则可以编译它，但不能更改Ceres的源代码。

Answer 1

固定于

include_directories(${EIGEN_INCLUDE_DIR})

在CMakeLists中...