c++ - OpenCV v3.3.1 ARM 交叉编译失败 : No CMAKE_CXX_COMPILER could be found

Question

我遵循了本教程，Cross compilation for ARM based Linux systems , 为了使用 cmake 为基于 ARM 的 Linux 系统构建 Opencv 版本 3.3.1(运行在 ODROID-XU4 Mini PC 上的 Ubuntu Mate)。对于构建过程，我正在运行 Ubuntu Mate v 16.04.1 x86。

请注意，我已经按照本教程 Opencv Installation in Linux 尝试为我的 Intel x86 Ubuntu based 运行机器构建相同版本的 Opencv ，我成功做到了。但是，当使用同一台机器为 ARM 构建它时，出现以下错误。

-- The CXX compiler identification is unknown
-- The C compiler identification is unknown
CMake Error at CMakeLists.txt:114 (project):
  No CMAKE_CXX_COMPILER could be found.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


CMake Error at CMakeLists.txt:114 (project):
  No CMAKE_C_COMPILER could be found.

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "/home/jhon/Programs/opencv-3.3.1/arm/CMakeFiles/CMakeOutput.log".
See also "/home/jhon/Programs/opencv-3.3.1/arm/CMakeFiles/CMakeError.log".

这是我生成此错误的命令行:

cmake -DCMAKE_TOOLCHAIN_FILE=../platforms/linux/arm-gnueabi.toolchain.cmake ..

请注意，选项 -DCMAKE_TOOLCHAIN_FILE 告诉 cmake 为基于 ARM 的 Linux 系统构建 Opencv，当我尝试删除它时，我成功地结束了为我的 x86 机器构建 Opencv，没有任何错误。

提前致谢。

Answer 1

OpenCV 文档告诉你只安装C 交叉编译器(package gcc-arm-linux-gnueabi)，但实际上 OpenCV 需要 C++编译器也是。

所以还需要安装g++-arm-linux-gnueabi包。