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[lld][docs] Document two linker-script related options for lld ELF #166313

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[lld][docs] Document two linker-script related options for lld ELF #166313

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19 changes: 19 additions & 0 deletions lld/docs/ELF/linker_script.rst
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Expand Up @@ -17,6 +17,25 @@ possible. We reserve the right to make different implementation choices where
it is appropriate for LLD. Intentional deviations will be documented in this
file.

Linker Script Specification
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

There are two lld options related to setting the linker script,
`--script=<file>` and `--default-script=<file>`. The usage are illustrated below.

::

# This sets `--script=<file>` option under the hood.
lld -T linker_script.lds

# This sets `--default-script=<file>` option under the hood.
lld -dT linker_script.lds

When both options are given, `--script=<file>` takes precedence.
The intended use case of `--default-script` is to be used by toolchain
configurations, and users can override the script by specifying `--script` if
needed.

Symbol assignment
~~~~~~~~~~~~~~~~~

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