LINK_OPTIONS: Add new family of properties

This family enable to manage link flags

Three new properties:
* directory property: LINK_OPTIONS
* target properties: LINK_OPTIONS and INTERFACE_LINK_OPTIONS

Two new commands
* add_link_options(): to populate directory property
* target_link_options(): to populate target properties

Fixes: #16543

1 files changed, 24 insertions, 0 deletions

diff --git a/Help/command/add_link_options.rst b/Help/command/add_link_options.rst
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+add_link_options
+----------------
+
+Adds options to the link of targets.
+
+::
+
+  add_link_options(<option> ...)
+
+Adds options to the linker command line for targets in the current
+directory and below that are added after this command is invoked.
+See documentation of the :prop_dir:`directory <LINK_OPTIONS>` and
+:prop_tgt:`target <LINK_OPTIONS>` ``LINK_OPTIONS`` properties.
+
+This command can be used to add any options, but alternative command
+exist to add libraries (:command:`target_link_libraries` or
+:command:`link_libraries`).
+
+Arguments to ``add_link_options`` may use "generator expressions" with
+the syntax ``$<...>``.  See the :manual:`cmake-generator-expressions(7)`
+manual for available expressions.  See the :manual:`cmake-buildsystem(7)`
+manual for more on defining buildsystem properties.
+
+.. include:: OPTIONS_SHELL.txt