opencv安装-ubuntu18.04

opencv安装

opencv安装报错：

In file included from /usr/include/host_config.h:50:0,
                 from /usr/include/cuda_runtime.h:78,
                 from <command-line>:0:
/usr/include/crt/host_config.h:121:2: error: #error -- unsupported GNU version! gcc versions later than 6 are not supported!
 #error -- unsupported GNU version! gcc versions later than 6 are not supported!
  ^~~~~
CMake Error at cuda_compile_generated_gpu_mat.cu.o.cmake:208 (message):
  Error generating
  /home/ty/Program/opencv-3.4.0/release/modules/core/CMakeFiles/cuda_compile.dir/src/cuda/./cuda_compile_generated_gpu_mat.cu.o


modules/core/CMakeFiles/opencv_core.dir/build.make:63: recipe for target 'modules/core/CMakeFiles/cuda_compile.dir/src/cuda/cuda_compile_generated_gpu_mat.cu.o' failed
make[2]: *** [modules/core/CMakeFiles/cuda_compile.dir/src/cuda/cuda_compile_generated_gpu_mat.cu.o] Error 1
CMakeFiles/Makefile2:1898: recipe for target 'modules/core/CMakeFiles/opencv_core.dir/all' failed
make[1]: *** [modules/core/CMakeFiles/opencv_core.dir/all] Error 2
make[1]: *** 正在等待未完成的任务....
[ 36%] Built target pch_Generate_opencv_test_videostab
Makefile:162: recipe for target 'all' failed
make: *** [all] Error 2

ubuntu18.04预装gcc版本为6.4，需要低于6.

安装报错：

Built target opencv_test_cudev

估计是和cuda有关

sudo ln -s /usr/bin/gcc-5 /usr/local/cuda-9.1/bin/gcc
sudo ln -s /usr/bin/g++-5 /usr/local/cuda-9.1/bin/g++`

注意：/usr/local/cuda-9.1/bin/下发现存在shell脚本 gcc和g++。 (只是sudo mv gcc gcc.sh)