mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-13 00:41:56 +00:00
0b90fd5adf
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>
|
||
|---|---|---|
| .. | ||
| src | ||
| CMakeLists.txt | ||
| prj.conf | ||
| README.rst | ||
| sample.yaml | ||
.. _hello_world:
Hello World
###########
Overview
********
A simple sample that can be used with any :ref:`supported board <boards>` and
prints "Hello World" to the console.
Building and Running
********************
This application can be built and executed on QEMU as follows:
.. zephyr-app-commands::
:zephyr-app: samples/hello_world
:host-os: unix
:board: qemu_x86
:goals: run
:compact:
To build for another board, change "qemu_x86" above to that board's name.
Sample Output
=============
.. code-block:: console
Hello World! x86
Exit QEMU by pressing :kbd:`CTRL+A` :kbd:`x`.