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Keith Packard 0b90fd5adf samples, tests, boards: Switch main return type from void to int As both C and C++ standards require applications running under an OS to return 'int', adapt that for Zephyr to align with those standard. This also eliminates errors when building with clang when not using -ffreestanding, and reduces the need for compiler flags to silence warnings for both clang and gcc. Most of these changes were automated using coccinelle with the following script: @@ @@ - void + int main(...) { ... - return; + return 0; ... } Approximately 40 files had to be edited by hand as coccinelle was unable to fix them. Signed-off-by: Keith Packard <keithp@keithp.com>		2023-04-14 07:49:41 +09:00
..
src
CMakeLists.txt
prj.conf
README.rst
sample.yaml

README.rst

.. _nanopb_sample:

Nanopb sample
#############

Overview
********

A simple protocol buffer sample using Nanopb for serializing structured data
to platform independent raw buffers or streams.


Requirements
************

Nanopb uses the protocol buffer compiler to generate source and header files,
make sure the ``protoc`` executable is installed and available.

.. tabs::

   .. group-tab:: Ubuntu

      Use ``apt`` to install dependency:

         .. code-block:: bash

            sudo apt install protobuf-compiler

   .. group-tab:: macOS

      Use ``brew`` to install dependency:

         .. code-block:: bash

            brew install protobuf

   .. group-tab:: Windows

      Use ``choco`` to install dependency:

         .. code-block:: console

            choco install protoc

Building and Running
********************

This application can be built as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/modules/nanopb
   :host-os: unix
   :board: qemu_x86
   :goals: run
   :compact: