跨平台项目中 Eigen 出错

Question

我正在开发一个动态库，它将在 Windows 和 Linux 软件上链接。为了简化构建操作我决定使用 cmake.

库具有以下结构：

MyProject
└ Subproject_1
| └ ...
| └ CMakeLists.txt
└ Subproject_2
| └ ...
| └ CMakeLists.txt
└ ...
└ CMakeLists.txt

在Subproject_1中我使用了Eigen 3.3（我下载了latest release）和OpenCV 3.3.0.

主要的 CMakeLists 文件是这个

cmake_minimum_required (VERSION 2.8)
SET(CMAKE_CXX_STANDARD 11)
project (MyProject)

## Output directory configuration
SET(out_dir ./)
SET(EXECUTABLE_OUTPUT_PATH ${out_dir}../lib/ CACHE PATH "Build directory" FORCE)
SET(LIBRARY_OUTPUT_PATH ${out_dir}../lib/ CACHE PATH "Build directory" FORCE)
SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${out_dir}../lib)
SET(CMAKE_BUILD_FILES_DIRECTORY ${out_dir})
SET(CMAKE_BUILD_DIRECTORY ${out_dir})
SET(CMAKE_BINARY_DIR  ${out_dir})
SET(CMAKE_CACHEFILE_DIR ${out_dir})

SET(opencv_path "")
if (WIN32 OR MSVC OR MSYS OR MINGW)
  SET(opencv_path "../opencv-3.3.0/build64/")
endif()
message("Setted OpenCV path to '" ${opencv_path} "'")

find_package(OpenCV REQUIRED PATHS ${opencv_path}
    opencv_core opencv_features2d opencv_flann opencv_highgui opencv_imgcodecs opencv_imgproc opencv_photo opencv_plot opencv_xfeatures2d opencv_ml opencv_video
)

# Additional dependencies
include_directories(
  ${OPENCV_INCLUDE_DIRS}
  "../eigen/"
  "Subprojects_1/include"
  "Subprojects/include"
)

## Subprojects
add_subdirectory ("Subproject_1")
add_subdirectory ("Subproject_2")

而 Subproject_1 CMakeLists 文件是

cmake_minimum_required (VERSION 2.8)
project(Subproject_1)

file (GLOB core_file "include/*.h" "src/*.cpp")
add_library(library SHARED ${core_file})
target_link_libraries(library 
  ${OpenCV_LIBRARIES}
)

现在，当我在 Windows 上编译项目时一切正常，但如果我尝试在 Ubuntu 16.04 LTS 上编译它，我会遇到以下错误：

... error: cannot declare reference to ‘Eigen::MatrixXi& {aka class Eigen::Matrix<int, -1, -1>&}’, which is not a typedef or a template type argument
   static void bitwiseAND(const Eigen::MatrixXi& m1, const Eigen::MatrixXi& m2, Eigen::MatrixXi& and);
                                                                                                 ^

... error: cannot declare reference to ‘Eigen::MatrixXi& {aka class Eigen::Matrix<int, -1, -1>&}’, which is not a typedef or a template type argument
   static void bitwiseNOT(const Eigen::MatrixXi& m, Eigen::MatrixXi& not);
                                                                     ^

我很确定问题不是由 cmake 引起的，但我在 Google 或这里没有找到任何可以帮助我解决问题的内容。此外，我尝试遵循 Eigen official instructions 但它们在 Windows.

上对我不起作用

准确地说，我正在使用：

于 Windows：Visual Studio 2017，制作版本 3.8 和 Ninja
在 Ubuntu 上：制作版本 4.1

库和 Eigen 文件在两个操作系统上是相同的，因为我共享包含两个存储库的工作区目录，而且我已经尝试在 Ubuntu.

欢迎大家提出建议

Answer 1

您必须避免在 Linux 下使用 not 和 and 作为变量名，您应该将它们重命名为其他名称以便您的代码编译。

它们实际上是 C++ 关键字（see here), which causes problems under Linux. Visual Studio does not recognize them, which explains why the compilation works under Windows. See this SO question 了解详情。

跨平台项目中 Eigen 出错

Error with Eigen in cross-platform project

c++

linux

windows

cmake

eigen3