nuttx | forked from https : //bitbucket.org/nuttx/nuttx

Installation instructions abound on the Internet complete with screen shots. I will attempt to duplicate those instructions in full here. Here are the simplified installation steps:.
Use "sudo apt-get install ". As examples, this is how you would get GIT:.
Download and unpack the NuttX tarball. If you are reading this, then you have probably already done that. After unpacking, you will end up with a directory called nuttx-version (where version is the NuttX version number). You might want to rename that directory nuttx to match the various instructions in the documentation and some scripts in the source tree.
The nuttx build directory should reside in a path that contains no spaces in any higher level directory name. For example, under Cygwin, your home directory might be formed from your first and last names like: "/home/First Last". That will cause strange errors when the make system tries to build. [Actually, that problem is probably not too difficult to fix. Some Makefiles probably just need some paths within double quotes]. I work around spaces in the home directory name, by creating a new directory that does not contain any spaces, such as /home/nuttx. Then I install NuttX in /home/nuttx and always build from /home/nuttx/nuttx-code.
Build Targets: Below is a summary of the build targets available in the top-level NuttX Makefile:. Application housekeeping targets. The APPDIR variable refers to the user application directory. A sample apps/ directory is included with NuttX, however, this is not treated as part of NuttX and may be replaced with a different application directory. For the most part, the application directory is treated like any other build directory in the Makefile script. However, as a convenience, the following targets are included to support housekeeping functions in the user application directory from the NuttX build directory. The following targets are used internally by the make logic but can be invoked from the command under certain conditions if necessary.
The beginnings of a Windows native build are in place but still not often used as of this writing. The build was functional but because of lack of use may find some issues to be resolved with this build configuration.