I was trying to install the ARM cross-compiler tool-chain on UDOO-Quad. The OS i'm using is UDOObuntu minimal version with LXDE. i wanted to run this command to execute one of my programs, command: armcc --cpu=cortex-A9 -o3 -otime --vectorize --remarks -c -std=c++11 "Program_Name.cpp" But, this gave an error stating that armcc is an unidentified command and that armcc had to be installed for the command to work. In-order to install armcc, i'm using the command as below. sudo apt-get install gcc-arm-linux-gnueabihf But, every time its run, i get an error stating package gcc-arm-linux-gnueabihf isn't available and has no installation candidate. so, if the package has been replaced by a new one, kindly update me on which exact package i am supposed to install or what i am supposed to to to get the ARM CC to work. Thank you.