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env: Explain how to use #include files in text environment

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Provide documentation on how to share common settings among boards.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> # Intel Edison
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Simon Glass 2023-07-30 21:01:46 -06:00 committed by Bin Meng
parent 5e541a05f7
commit 63af90e7f0
1 changed files with 6 additions and 0 deletions
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6
doc/usage/environment.rst
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@ -81,6 +81,12 @@ Example::
echo CONFIG_SYS_BOARD boot failed - please check your image
echo Load address is CONFIG_SYS_LOAD_ADDR
Settings which are common to a group of boards can use #include to bring in
a common file in the `include/env` directory, containing environment
settings. For example::
#include <env/ti/mmc.env>
If CONFIG_ENV_SOURCE_FILE is empty and the default filename is not present, then
the old-style C environment is used instead. See below.