2cd51a33ce
This provides a better error message when building with CMake and forgetting ZEPHYR_BASE or not registering Zephyr in the CMake package registry. See parent commit for more details (split from parent for better readability). Signed-off-by: Marc Herbert <marc.herbert@intel.com> |
||
---|---|---|
.. | ||
src | ||
CMakeLists.txt | ||
Makefile.posix | ||
prj.conf | ||
README.rst | ||
sample.yaml |
.. _posix-gettimeofday-sample: POSIX gettimeofday() with clock initialization over SNTP ######################################################## Overview ******** This sample application demonstrates using the POSIX gettimeofday() function to display the absolute wall clock time every second. At system startup, the current time is queried using the SNTP networking protocol, enabled by setting the :option:`CONFIG_NET_CONFIG_CLOCK_SNTP_INIT` and :option:`CONFIG_NET_CONFIG_SNTP_INIT_SERVER` options. Requirements ************ - :ref:`networking_with_host` - or, a board with hardware networking - NAT/routing should be set up to allow connections to the Internet - DNS server should be available on the host to resolve domain names Building and Running ******************** This project outputs to the console. It can be built and executed on QEMU as follows: .. zephyr-app-commands:: :zephyr-app: samples/posix/gettimeofday :host-os: unix :board: qemu_x86 :goals: run :compact: For comparison, a version for native POSIX operating systems (e.g. Linux) can be built using: .. code-block:: console make -f Makefile.posix