opencv3.0.0 and ubuntu15.10:CMake Error at 3rdparty/ippicv/downloader.cmake:75

Make Error at 3rdparty/ippicv/downloader.cmake:75 (message):
ICV: Failed to download ICV package: ippicv_linux_20140513.tgz.
Status=28;"Timeout was reached"
Call Stack (most recent call first):
3rdparty/ippicv/downloader.cmake:108 (_icv_downloader)
cmake/OpenCVFindIPP.cmake:212 (include)
cmake/OpenCVFindLibsPerf.cmake:12 (include)
CMakeLists.txt:449 (include)

-- Configuring incomplete, errors occurred!

linux安装opencv需要使用到的ippicv_linux_20141027.tgz安装包.Is it because OpenCV3.0 needs another version of ippicv? I understand that the error comes while downloading ippicv_linux_20140513.tgz (in the 3rd party, ippicv folder).
因为墙的原因一直下载不下来.
下载后拷贝到opencv/3rdparty/ippicv/downloads/linux-8b449a536a2157bcad08a2b9f266828b/ 目录下即可，如果没有该目录，则创建之。

ippicv_linux_20141027.tgz from: http://download.csdn.net/detail/yunlong782/8940743#comment

get information from: http://stackoverflow.com/questions/25726768/opencv-3-0-trouble-with-installation[/code] 
Ubuntu15.10 安装OpenCV3.0.0
1   sudo apt-get install build-essential libgtk2.0-dev libjpeg-dev libtiff4-dev libjasper-dev libopenexr-dev cmake python-dev python-numpy python-tk libtbb-dev libeigen3-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev
libxvidcore-dev libx264-dev libqt4-dev libqt4-opengl-dev sphinx-common texlive-latex-extra libv4l-dev libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev default-jdk ant libvtk5-qt4-dev

2   /usr/local/opencv3.0.0

sudo mkdir build
cd build

sudo cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

3  sudo make

sudo make install

4  配置opencv.conf file ，加入环境变量

sudo gedit /etc/ld.so.conf.d/opencv.conf

在opencv.conf里面加入命令

/usr/local/lib

更新库目录

sudo ldconfig

打开文件bash.bashrc

sudo gedit /etc/bash.bashrc

加入下面两行

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig

export PKG_CONFIG_PATH