Work In Progress

NuttX 9.2 has not been released yet. These Release Notes are a work-in-progress in preparation for the next release of NuttX.  There is a board tracking the PRs that need to be looked at to add to this doc for the OS TODO ADD LINK and for the Apps TODO ADD LINK

What's New In This Release

Major Changes to Core OS

New Features

Bug Fixes

Major Changes to the Build System

New Features

Bug Fixes

Architectural Support

New Architecture Support

Driver Support

Bug Fixes

New Driver Support

Drivers With Significant Improvements

Board Support

Significant Improvements

New Board Support

Boards With Significant Improvements

File System

Bug Fixes

Significant Improvements

Networking

Applications

Improvements

Bug Fixes

Security Issues Fixed In This Release

Compatibility Concerns

Changes to Build System

In Apps, Change $(TOPDIR) to $(APPDIR)

In the 'apps' repo, Makefiles are now using $(APPDIR) instead of $(TOPDIR).

In your custom app's Makefile, it is recommended to change $(TOPDIR) to $(APPDIR).

Replace this line:

include $(TOPDIR)/Make.defs

With this:

include $(APPDIR)/Make.defs

See git commit # deaa6c5b7bf8445b4a300691525f60aa506be0d7 in the NuttX 'apps' repository.

Custom Boards Don't Need ARCHINCLUDES and ARCHXXINCLUDES Definitions

As part of an effort to unify support for uClibc++ and libc++, the C/C++ include search path definitions ARCHINCLUDES and ARCHXXINCLUDES are now defined in one central place in tools/Config.mk. It is no longer necessary to define these in every board's scripts/Make.defs. Boards included in the NuttX repository have been updated, but if you are building NuttX for a custom board and are using C++, you may want to make the following changes:

In your board's configuration, ensure that you have enabled either CONFIG_UCLIBCXX or CONFIG_LIBCXX as appropriate.

In your custom board's scripts/Make.defs file, remove lines like these:

CINCPATH := ${shell $(INCDIR) -s "$(CC)" $(TOPDIR)$(DELIM)include}
CXXINCPATH := ${shell $(INCDIR) -s "$(CC)" $(TOPDIR)$(DELIM)include$(DELIM)cxx}
ARCHINCLUDES += $(CINCPATH)
ARCHXXINCLUDES += $(CINCPATH) $(CXXINCPATH)

In case your scripts/Make.defs uses different names, such as ARCHINCLUDESXX instead of ARCHXXINCLUDES, you'll need to find all uses of that variable and update them to use ARCHXXINCLUDES.

See git commit #d32e9c38dfb0659a7f3c0cf586ba1584cd7eb3d6 in the main NuttX repository. See also the preceding commit, 6abd03d53ff9164fb17ea4aca701a49fbbf751c0.

Known Problems In This Release

More Information

How to Download

Release artifacts for all current and past NuttX releases can be downloaded at:

How to Clone the Git Repository

The Apache NuttX project uses Git SCM as its version control system.

There are two primary repositories:

The main "Single Source of Truth" repositories are hosted by the ASF:

These are synchronized with repositories hosted at GitHub:

How to Contact the Community

The main forum for project communication, to ask a question, get involved, or contribute to NuttX, is our mailing list, dev@nuttx.apache.org. The list is publicly archived and searchable at https://lists.apache.org/list.html?dev@nuttx.apache.org. For more information, see NuttX Community.

Enthusiastic Contributors Welcome!

NuttX is a free open-source project. If you'd like to participate, whether it's to enhance documentation (even these release notes) or dive into the nitty gritty of some low-level drivers, please join us! You can join the conversation at our dev mailing list by emailing dev-subscribe@nuttx.apache.org. The mailing list is open to the public and archived. You can browse older messages at https://lists.apache.org/list.html?dev@nuttx.apache.org.