一、个性化编译
vcpkg install opencv[cuda]:x64-windows 这样就会安装好具有Cuda加速的opencv 库。
但是由于VS2017 CUDA8.0 CUDA9.0 CUDA9.1 版本的兼容问题
但是如果在我们使用CMake编译成功的话，这种定制化编译也一定会成功
参考博客：
https://blog.csdn.net/ewqapple/article/details/78428062
二、错误分析方法
使用vcpkg时，会碰到CMake错误。 有些以前能编译通过的包， 过一段时间又不能编译错误了，错误提示一般是CMake错误。
处理错误的步骤：
- 分析错误
- 查看错误日志
- 查看cmake文件
- 手工处理错误
下面是我opencv编译错误解决过程：
1. 执行vcpkg命令
./vcpkg.exe install opencv
2. 错误信息
Starting package 15/23: opencv:x64-windows
Building package opencv[core,eigen,flann,jpeg,opengl,png,tiff]:x64-windows...
-- Downloading https://github.com/opencv/opencv/archive/3.4.3.tar.gz...
-- Downloading https://github.com/opencv/opencv/archive/3.4.3.tar.gz... Failed. Status: 18;"Transferred a partial file"
CMake Error at scripts/cmake/vcpkg_download_distfile.cmake:156 (message):
Failed to download file.
If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment
variables to "https://user:password@your-proxy-ip-address:port/".
Otherwise, please submit an issue at https://github.com/Microsoft/vcpkg/issues
Call Stack (most recent call first):
scripts/cmake/vcpkg_from_github.cmake:108 (vcpkg_download_distfile)
ports/opencv/portfile.cmake:5 (vcpkg_from_github)
scripts/ports.cmake:71 (include)
Error: Building package opencv:x64-windows failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with `.\vcpkg update`, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: opencv:x64-windows
Vcpkg version: 2018.11.23-nohash
Additionally, attach any relevant sections from the log files above.3. 查看错误日志（XXX-err.log）
参考博客：
http://www.bubuko.com/infodetail-2238260.html
三、默认x86 或者 x64
vcpkg默认安装32位的包，为了让它安装64位的包，可以添加系统环境变量：
VCPKG_DEFAULT_TRIPLET=x64-windows
最后确认下我自己的版本，因为这个更新特别快，不一定下次就好使：
