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Daniel Leung deeb98da53 cmake: compiler/xcc: omit -g if needed for Clang
Some older versions of XCC Clang would result in the following
error during compilation:

  /tmp/file.s: Assembler messages:
  /tmp/file.s:20: Error: file number 1 already allocated
  clang-3.9: error: Xtensa-as command failed with exit code 1

due to a bug in LLVM: https://bugs.llvm.org/show_bug.cgi?id=11740.
This is fixed in upstream, https://reviews.llvm.org/D20002, in 2016.
However, it seems that it is only fixed after XCC RI-2018.0.
Instead of blanket disabling usage of '-g', use an environment
variable "XCC_NO_G_FLAG" to disable usage of flag '-g' to workaround
this issue. This needs to be manually set because there is no way to
know which XCC version is being used, and compiler flag checking for
'-g' would not result in error (and thus '-g' is not ignored).
This is only needed for older XCC Clang. For sufficiently new XCC
verisons, there is no need for this.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2022-01-25 21:16:32 -05:00
.github actions: add label for MIPS architecture area 2022-01-24 09:55:48 -05:00
arch arch/xtensa: Fix xcc regression with ZSR 2022-01-20 14:37:13 -05:00
boards soc: esp32c3: prepare kconfigs and cmake to support mcuboot 2022-01-22 16:55:00 -05:00
cmake cmake: compiler/xcc: omit -g if needed for Clang 2022-01-25 21:16:32 -05:00
doc doc: mention MIPS architecture support 2022-01-24 17:11:42 -05:00
drivers drivers: counter: mcux_ctimer: fix config used as non-const 2022-01-25 18:16:42 -06:00
dts stm32g4: adc: Add DTS for ADC345 2022-01-21 14:38:50 -05:00
include net: sockets: Use struct timeval provided by libc 2022-01-21 13:17:43 -05:00
kernel kernel: Update CPU runtime stats of non-idle time 2022-01-20 08:22:01 -05:00
lib libc: newlibc: Fix recursive gettimeofday() calls on non-Posix systems 2022-01-21 15:27:45 -05:00
misc cmake: kconfig: fix issue if Kconfig symbol name contains lower case 2021-11-18 13:56:07 +01:00
modules soc: imx_rt: Enable IMX.RT General Power Controller Driver 2022-01-18 14:09:45 -05:00
samples tracing_user: Add ISR nest level parameter 2022-01-21 14:38:35 -05:00
scripts twister: ignore unencodable unicode of west flash command. 2022-01-25 08:15:17 -05:00
share cmake: check zephyr version if specified and ZEPHYR_BASE is set 2021-05-25 16:48:35 -05:00
soc soc/intel_adsp: DMA Stability fix for cavstool 2022-01-25 08:59:11 -05:00
submanifests west.yml: allow users to easily add more modules 2021-10-07 13:45:42 +02:00
subsys debug: Remove deprecated CONFIG_OPENOCD_SUPPORT 2022-01-24 10:23:20 -05:00
tests tests/lib/ringbuffer: Run with one CPU 2022-01-24 12:23:46 -05:00
.checkpatch.conf checkpatch: Ignore IS_ENABLED_CONFIG warnings 2021-10-18 08:28:01 -04:00
.clang-format clang-format: Change lines length limit from 80 to 100 2021-05-06 08:13:32 -05:00
.codecov.yml
.editorconfig editorconfig: indent Kconfig files with tabs 2020-07-08 21:30:38 -04:00
.gitattributes gitattributes: consider SVG files generated 2021-10-14 12:42:44 -04:00
.gitignore gitignore: ignore macos DS_Store files 2021-11-03 16:14:20 -04:00
.gitlint gitlint: Stop ignoring merge, revert, fixup and squash commits 2022-01-10 08:13:36 -05:00
.mailmap mailmap: update mailmap file with some stray emails 2021-06-17 14:15:41 -04:00
.uncrustify.cfg uncrustify: force a single EOF newline 2021-11-03 16:14:20 -04:00
CMakeLists.txt cmake: support ELF image adjustment 2022-01-22 16:57:31 -05:00
CODE_OF_CONDUCT.md coc: move to markdown format 2019-01-24 15:37:15 -05:00
CODEOWNERS scripts: generate image info header file 2022-01-22 16:57:31 -05:00
CONTRIBUTING.rst doc: Fixed a link in CONTRIBUTING.rst 2019-02-28 12:46:04 -08:00
Kconfig kconfig: Clean up header comments and make them consistent 2019-11-04 17:31:27 -05:00
Kconfig.zephyr cmake: support ELF image adjustment 2022-01-22 16:57:31 -05:00
LICENSE
MAINTAINERS.yml ci: remove .buildkite 2022-01-18 13:24:42 -05:00
README.rst doc: replace buildkite with github actions 2021-11-24 12:37:30 -05:00
VERSION release: Zephyr 3.0.0-rc1 2022-01-24 15:31:45 -08:00
version.h.in cmake: explain BUILD_VERSION and KERNEL_VERSION_* 2019-05-09 11:52:05 +02:00
west.yml drivers: uart: esp32: use DEVICE_DT_INST_DEFINE() 2022-01-21 13:16:55 -05:00
zephyr-env.cmd scripts: remove west from scripts/ 2019-01-29 10:15:01 +01:00
zephyr-env.sh zephyr_env.sh: Remove semicolons at ends of lines 2019-12-10 14:34:46 -08:00

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <img src="doc/_static/images/logo-readme.png">
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <a
   href="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml?query=branch%3Amain">
   <img
   src="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml/badge.svg?event=push"></a>


The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM Cortex-M,
Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of
`supported boards`_.

.. below included in doc/introduction/introduction.rst


Getting Started
***************

Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

.. start_include_here

Community Support
*****************

Community support is provided via mailing lists and Discord; see the Resources
below for details.

.. _project-resources:

Resources
*********

Here's a quick summary of resources to help you find your way around:

* **Help**: `Asking for Help Tips`_
* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
  searchable index
* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
* **Samples and example code**: see `Sample and Demo Code Examples`_
* **Mailing Lists**: users@lists.zephyrproject.org and
  devel@lists.zephyrproject.org are the main user and developer mailing lists,
  respectively. You can join the developer's list and search its archives at
  `Zephyr Development mailing list`_. The other `Zephyr mailing list
  subgroups`_ have their own archives and sign-up pages.
* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
  The builds@lists.zephyrproject.org mailing list archives the CI nightly build results.
* **Chat**: Real-time chat happens in Zephyr's Discord Server. Use
  this `Discord Invite`_ to register.
* **Contributing**: see the `Contribution Guide`_
* **Wiki**: `Zephyr GitHub wiki`_
* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
  security issues; also see our `Security`_ documentation. Security issues are
  tracked separately at https://zephyrprojectsec.atlassian.net.
* **Zephyr Project Website**: https://zephyrproject.org

.. _Discord Invite: https://chat.zephyrproject.org
.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/getting_started/index.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
.. _Security: http://docs.zephyrproject.org/latest/security/index.html
.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/getting_started/index.html#asking-for-help