On my previous post I discussed some stats using Buildroot toolchain to build Nuttx. Today I’ll add the necessary steps to build on Ubuntu. Ubuntu is de-facto GNU/Linux distribution (although I’m Gentoo user) and many users, from different areas, uses it [they are not necessary command line experts] so I decided to publish my raw tutorial. If you are familiarized installing files from source-code you probably won’t need this…

1. Dependencies

$ sudo apt-get install libncurses5-dev
$ sudo apt-get install bison
$ sudo apt-get install flex
$ sudo apg-get install libgmp3-dev
$ sudo apg-get install libmpc-dev
$ sudo apg-get install libmpfr-dev
$ sudo apg-get install binutils-dev

2. Download

$ mkdir Nuttx
$ cd Nuttx

$ wget http://sourceforge.net/projects/nuttx/files/nuttx/nuttx-5.10/nuttx-5.10.tar.gz/download
$ wget http://sourceforge.net/projects/nuttx/files/buildroot/buildroot-1.8/buildroot-1.8.tar.gz/download

$ ls
buildroot-1.8.tar.gz  nuttx-5.10.tar.gz

3. Install

$ tar zxf buildroot-1.8.tar.gz
$ tar zxf nuttx-5.10.tar.gz

$ cd misc/
$ ln -s ../nuttx-5.10 nuttx

You need define some Nuttx files before:

$ cd nuttx/
$ cd tools/
$ ./configure.sh nucleus2g/nsh # or ./configure <board-name>
$ cd -

$ cd ../misc

I’m building a toolchain for arm cortex-m3 but check configs/ to other configuration files.

$ cd buildroot-1.8/
$ cp configs/cortexm3-defconfig-4.3.3 .
$ mv cortexm3-defconfig-4.3.3 .config

$ make menuconfig
[If you don't have any changes, just click on 'exit' and save the configuration]

$ make
[will download and build all necessary files]

$ cd build_arm_nofpu/staging_dir/bin
$ export PATH=`pwd`:$PATH
$ cd -

$ cd ../nuttx
[use normally]

I usually create an script to (re)define the $PATH for necessary building tools, something like:

$ echo “export PATH=\”"$PATH”\”" > compiler.sh