Javier Alonso
d1772e1432
The Open Group Base Specification IEEE Std 1003.1-2024 states that > The <mqueue.h> header shall define O_RDONLY, O_WRONLY, O_RDWR, > O_CREAT, O_EXCL, and O_NONBLOCK as described in <fcntl.h>. https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/mqueue.h.html It also states that: > The <mqueue.h> header shall define the struct timespec structure as described in <time.h>. https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/mqueue.h.html The way the `mqueue.h` include file is defined right now violates the standard, having potentially different code depending on the platform the code is being compiled against - assuming a multi-arch POSIX environment. The standard also states that: > Inclusion of the <mqueue.h> header may make visible symbols defined > in the headers <fcntl.h>, <signal.h>, and <time.h>. So having those includes shouldn't be an issue.
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.
Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.