使用 gnu 编译器/默认 C++ 库在 Raspberry Pi 4 上安装 Opencv 时出现问题

Question

我有带有 Raspbian 的 Raspberry Pi 4（更新到最新版本）并尝试获取 Opencv。我有 Python 2.7、所有依赖项等。我在虚拟环境中工作，但在非虚拟版本上安装了另一个版本，我得到了同样的错误。

(cv) pi@raspberrypi:~ $ cd ~/opencv-3.1.0/build
(cv) pi@raspberrypi:~/opencv-3.1.0/build $ make
[  2%] Built target libwebp
[  4%] Built target libjasper
[  7%] Built target IlmImf
[  7%] Built target opencv_highgui_pch_dephelp
[  7%] Built target pch_Generate_opencv_highgui
[  8%] Built target opencv_core_pch_dephelp
[  8%] Generating precomp.hpp.gch/opencv_core_RELEASE.gch
In file included from 
/usr/include/c++/8/bits/stl_algo.h:59,
             from /usr/include/c++/8/algorithm:62,
             from /home/pi/opencv-3.1.0/modules/core/include/opencv2/core/base.hpp:53,
             from /home/pi/opencv-3.1.0/modules/core/include/opencv2/core.hpp:54,
             from /home/pi/opencv-3.1.0/modules/core/include/opencv2/core/utility.hpp:52,
             from /home/pi/opencv-3.1.0/build/modules/core/precomp.hpp:49:
/usr/include/c++/8/cstdlib:75:15: fatal error: stdlib.h: 
No such file or directory
 #include_next <stdlib.h>
           ^~~~~~~~~~
compilation terminated.
make[2]: *** [modules/core/CMakeFiles/pch_Generate_opencv_core.dir/build.make:64: modules/core/precomp.hpp.gch/opencv_core_RELEASE.gch] 
Error 1
make[1]: *** [CMakeFiles/Makefile2:2336: modules/core/CMakeFiles/pch_Generate_opencv_core.dir/all] 
Error 2
make: *** [Makefile:163: all] Error 2

cv 是我的虚拟环境。错误发生在 pi 附带的默认 C++ 目录中的文件中。 c++标准库在同一个文件夹中找不到C标准库。我已经检查过它们都在那里并且都未经编辑。我想知道 gnu 编译器如何只能访问 C++ 目录的一部分。

Answer 1

尝试禁用预编译头文件：

-DENABLE_PRECOMPILED_HEADERS=OFF

删除目录build。

试试这个：

(cv) pi@raspberrypi:~ $ cd ~/opencv-3.1.0 
(cv) pi@raspberrypi:~/opencv-3.1.0 $ mkdir build && cd build
(cv) pi@raspberrypi:~/opencv-3.1.0/build $ cmake -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_PRECOMPILED_HEADERS=OFF  <here_your_options>...
(cv) pi@raspberrypi:~/opencv-3.1.0/build $
(cv) pi@raspberrypi:~/opencv-3.1.0/build $ make
(cv) pi@raspberrypi:~/opencv-3.1.0/build $ sudo make install