Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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hanzhijian f8ff088b98 tools: pass TOPDIR in SDIR_template and MAKE_template
SDIR_template and MAKE_template did not pass TOPDIR to recursive makes.
When a sub-make needed to include $(TOPDIR)/Make.defs (e.g. to define
SDIR_template for further recursion), TOPDIR was missing and the include
silently failed via '-include'.

Pass TOPDIR in both templates so recursive makes have full access to the
build system configuration.

Signed-off-by: hanzhijian <hanzhijian@zepp.com>
2026-09-17 13:49:05 +08:00
.github ci: apply Depends-On dependencies to the memory report 2026-09-15 08:47:25 -03:00
arch xtensa/espressif: enable openeth RX interrupt, fix ifdown()'s TX/RX disable 2026-09-15 18:16:44 -03:00
audio audio: limit the buffer count guard to shared ring requests 2026-08-05 07:58:53 +02:00
binfmt libs/libc/elf, binfmt: Describe the GOT by base and size, not by index. 2026-09-08 16:31:16 -03:00
boards boards/esp32s3-xiao: wire up board_spiflash_init() 2026-09-17 02:18:22 +08:00
cmake cmake: fix undefined function name in parse args error messages 2026-09-11 21:15:22 +08:00
crypto tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
Documentation boards/qemu-armv8a: add S2OPC server configuration 2026-09-15 14:55:24 +02:00
drivers drivers/sensors/sensor: cancel fetch watchdog on close to fix UAF 2026-09-15 09:41:11 +08:00
dummy
fs fs/aio: raise the default AIO_LISTIO_MAX so LTP keeps passing 2026-09-14 17:12:49 -03:00
graphics graphics/nxterm: consume SGR escape sequences 2026-08-23 10:46:02 +08:00
include libc: add paths.h, sys/ttydefaults.h and termios IUTF8 2026-09-15 14:51:15 +02:00
libs libc/atexit: honor registrations made during exit processing 2026-09-14 18:52:46 -03:00
mm mm/pgalloc: support 32 KB and 64 KB page sizes 2026-09-10 23:28:43 +08:00
net net/tcp: add configurable delayed ACK threshold 2026-09-08 09:00:19 +08:00
openamp cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
pass1 tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
sched sched/clock: Normalize CLOCK_FD getres errors. 2026-09-16 00:04:02 +08:00
syscall fs: rename PSEUDOFS_SOFTLINKS to FS_LINKS 2026-08-27 01:12:33 +08:00
tools tools: pass TOPDIR in SDIR_template and MAKE_template 2026-09-17 13:49:05 +08:00
video video/videomode: Fix EDID parsing and formatting of video mode dumps 2026-08-29 11:09:11 -03:00
wireless wireless/bluetooth: fix inverted MTU cap in bt_conn_send() 2026-08-30 10:48:18 -03:00
.asf.yaml
.codespell-ignore-lines arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
.codespellrc Revert "zbus: Add linker support and documentation for the zbus port" 2026-08-30 10:45:19 -03:00
.editorconfig
.gitignore boards/risc-v/eic7700x: Adopt the common board layout. 2026-08-19 01:40:57 +08:00
.gitmessage
.pre-commit-config.yaml
.yamllint
AUTHORS AUTHORS: add Jorge Guzman 2026-08-25 08:43:13 -04:00
CMakeLists.txt cmake: reconfigure when .config changes 2026-09-14 18:40:45 -03:00
CONTRIBUTING.md contributing: Add requirement for 'Assisted-by' commit field 2026-07-12 09:42:28 +08:00
INVIOLABLES.md
Kconfig include/nuttx: Add link-time iterable sections infrastructure 2026-08-27 01:04:05 +08:00
LICENSE libs/libdsp: Add Matrix operations 2026-07-11 14:55:59 -03:00
Makefile !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-09 22:41:11 +08:00
NOTICE
README.md ci/testing: Add MemBrowse Integration 2026-06-18 12:07:41 -03:00
ReleaseNotes

POSIX Badge License Issues Tracking Badge Contributors GitHub Build Badge Documentation Badge MemBrowse

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.