构建 OpenCV 时出错："recompile with -fPIC"

Question

我在本指南的帮助下在Linux上安装OpenCV.html

在最后一步，我收到以下错误。我试图在 cmake-gui 中添加fPIC，但仍未解决问题。在CMAKE-GUI中，我创建了一个新的名称值条目：CXX_FLAG -fPIC-不确定这是否是正确的方法。

make -j
Linking CXX shared library ../../lib/libopencv_java331.so
/usr/bin/ld: CMakeFiles/opencv_java.dir/generator/src/cpp/listconverters.cpp.o: relocation R_X86_64_32 against `.bss' can not be used when making a shared object; recompile with -fPIC
CMakeFiles/opencv_java.dir/generator/src/cpp/listconverters.cpp.o: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
make[2]: *** [lib/libopencv_java331.so] Error 1
make[1]: *** [modules/java/CMakeFiles/opencv_java.dir/all] Error 2
make: *** [all] Error 2

更新：CMAKE-GUI中的正确标志是cmake_cxx_flags。configure, generate and make -j之后仍未出错。

Answer 1

好。这是对我有用的。

$ export JAVA_HOME=/lib/jvm/java-1.8.0-openjdk-1.8.0.151-1.b12.el7_4.x86_64 //replace with your JDK path
$ git clone https://github.com/opencv/opencv.git
$ cd opencv
$ mkdir build
$ cd build
$ cmake -D BUILD_SHARED_LIBS=OFF -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=. ..
$ make -j
BUILD SUCCESSFUL
Total time: 10 seconds