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samples: posix: gettimeofday: Make networking requirements explicit

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Standard "Requirements" section copied from other networking samples,
making clear the network connection requirements and linking to
instructions for QEMU networking.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This commit is contained in:
Paul Sokolovsky 2020-04-28 13:14:24 +03:00 • committed by Jukka Rissanen
commit 215253910e
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samples/posix/gettimeofday/README.rst
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@ -12,6 +12,14 @@ 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
********************