# CentOS Development Environment


This development environment is not supported. See Toolchain Installation for information about the environments and tools we do support!

The build requires Python 2.7.5. Therefore as of this writing Centos 7 should be used. (For earlier Centos releases a side-by-side install of python v2.7.5 may be done. But it is not recommended because it can break yum.)

# Common Dependencies

The EPEL repositories are required for openocd libftdi-devel libftdi-python

wget https://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
sudo yum install epel-release-7-5.noarch.rpm
yum update
yum groupinstall “Development Tools”
yum install python-setuptools python-numpy
easy_install pyserial
easy_install pexpect
easy_install toml
easy_install pyyaml
easy_install cerberus
yum install openocd libftdi-devel libftdi-python python-argparse flex bison-devel ncurses-devel ncurses-libs autoconf texinfo libtool zlib-devel cmake vim-common


You may want to also install python-pip and screen.

# GCC Toolchain Installation

Execute the script below to install GCC 7-2017-q4:


This version of GCC is out of date. At time of writing the current version on Ubuntu is 9-2020-q2-update (see focal nuttx docker file (opens new window))

pushd .
cd ~
wget https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/7-2017q4/gcc-arm-none-eabi-7-2017-q4-major-linux.tar.bz2
tar -jxf gcc-arm-none-eabi-7-2017-q4-major-linux.tar.bz2
exportline="export PATH=$HOME/gcc-arm-none-eabi-7-2017-q4-major/bin:\$PATH"
if grep -Fxq "$exportline" ~/.profile; then echo nothing to do ; else echo $exportline >> ~/.profile; fi

Now restart your machine.


Check the version by entering the following command:

arm-none-eabi-gcc --version

The output should be something similar to:

arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2017-q4-major) 7.2.1 20170904 (release) [ARM/embedded-7-branch revision 255204]
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO

# Ninja Build System

Ninja (opens new window) is a faster build system than Make and the PX4 CMake generators support it.

On Ubuntu Linux you can install this automatically from normal repos.

sudo apt-get install ninja-build -y

Other systems may not include Ninja in the package manager. In this case an alternative is to download the binary and add it to your path:

mkdir -p $HOME/ninja
cd $HOME/ninja
wget https://github.com/martine/ninja/releases/download/v1.6.0/ninja-linux.zip
unzip ninja-linux.zip
rm ninja-linux.zip
exportline="export PATH=$HOME/ninja:\$PATH"
if grep -Fxq "$exportline" ~/.profile; then echo nothing to do ; else echo $exportline >> ~/.profile; fi
. ~/.profile