Compiling OpenCV from source for ARM (RoboRio) in Ubuntu/Debian/Mint

[FleventyFive]

1. Install dependencies
   

   sudo apt-get install build-essential 
   sudo apt-get install cmake
   sudo apt-get install gcc-arm-linux-gnueabi
   sudo apt-get install g++-arm-linux-gnueabi

2. Enter directory that will hold opencv
   

   cd ~/Documents

3. Clone OpenCV from git
   

   git clone https://github.com/Itseez/opencv.git

4. Checkout to a recent OpenCV release (change 2.4.10.1 to a recent release)
   

   cd opencv
   git checkout tags/2.4.10.1

5. Set toolchain to correct version of g++ (change line in file or run this complicated one-liner
   

   cd platforms/linux
   
   x=$(dpkg -s g++-arm-linux-gnueabi | grep "Version" | grep -o ".\.."); sed -i 's/set(GCC_COMPILER_VERSION "*.*"/set(GCC_COMPILER_VERSION \"'$x'\" CACHE STRING "GCC Compiler version"/g' arm-gnueabi.toolchain.cmake

6. Prepare file for build
   

   mkdir build_roborio
   cd build_roborio
   cmake -DSOFTFP=ON -DCMAKE_TOOLCHAIN_FILE=../arm-gnueabi.toolchain.cmake ../../..

7. Build project (this will take a while)
   

   make