CMake OpenCV安装问题

Question

在过去的三个小时里我都快疯了。我只想安装CMake，然后安装OpenCV 3.1，但是我得到了一个Unsupported protocol错误(请参见下面)。

我安装了CMake 3.4.3。就像这样：

wget https://cmake.org/files/v3.4/cmake-3.4.3.tar.gz
tar xf cmake-3.4.3.tar.gz
cd cmake-3.4.3
./configure
make
sudo make install

然后运行这个：

./bootstrap --prefix=/usr
make
sudo make install

当我在OpenCV的安装过程中运行以下命令时，会出错：

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..

这正是我所得到的错误：

CMake Warning at 3rdparty/ippicv/downloader.cmake:56 (message):
  ICV: Local copy of ICV package has invalid MD5 hash:
  d41d8cd98f00b204e9800998ecf8427e (expected:
  808b791a6eac9ed78d32a7666804320e)
Call Stack (most recent call first):
  3rdparty/ippicv/downloader.cmake:110 (_icv_downloader)
  cmake/OpenCVFindIPP.cmake:237 (include)
  cmake/OpenCVFindLibsPerf.cmake:12 (include)
  CMakeLists.txt:537 (include)


-- ICV: Downloading ippicv_linux_20151201.tgz...
CMake Error at 3rdparty/ippicv/downloader.cmake:73 (file):
  file DOWNLOAD HASH mismatch

    for file: [/home/ao/opt/opencv/3rdparty/ippicv/downloads/linux-808b791a6eac9ed78d32a7666804320e/ippicv_linux_20151201.tgz]
      expected hash: [808b791a6eac9ed78d32a7666804320e]
        actual hash: [d41d8cd98f00b204e9800998ecf8427e]
             status: [1;"Unsupported protocol"]

Call Stack (most recent call first):
  3rdparty/ippicv/downloader.cmake:110 (_icv_downloader)
  cmake/OpenCVFindIPP.cmake:237 (include)
  cmake/OpenCVFindLibsPerf.cmake:12 (include)
  CMakeLists.txt:537 (include)


CMake Error at 3rdparty/ippicv/downloader.cmake:77 (message):
  ICV: Failed to download ICV package: ippicv_linux_20151201.tgz.
  Status=1;"Unsupported protocol"
Call Stack (most recent call first):
  3rdparty/ippicv/downloader.cmake:110 (_icv_downloader)
  cmake/OpenCVFindIPP.cmake:237 (include)
  cmake/OpenCVFindLibsPerf.cmake:12 (include)
  CMakeLists.txt:537 (include)

所以很明显有一个哈希错配。我猜这是一个CMake (也许我的安装不正确？)。我必须如何解决这个问题，安装OpenCV不可能那么困难，对吗？

Answer 1

我在这个评论中找到了解决方案。基本上，我只需手动下载文件ippicv_linux_20151201.tgz (从这里)并将zip文件移动到正确的位置(/home/ao/opt/opencv/3rdparty/ippicv/downloads/linux-808b791a6eac9ed78d32a7666804320e/)。

然后它可以编译:)

Answer 2

或者，您可以用SSL支持重新编译cmake，因为这最终是“散列不匹配”的原因(状态：1；“不支持的议定书”)。

Answer 3

来自：

https://stackoverflow.com/questions/32749454/opencv-installation-error-ubuntu-14-04/38054298#38054298

再试一次：

 cmake \
 -DOPENCV_ICV_URL="http://downloads.sourceforge.net/project/opencvlibrary/3rdparty/ippicv"