Help: Clarify that {add,target}_compile_options are not used for linking

Link to alternatives that can be used for adding link options.

Issue: #24662

Help/command/add_compile_options.rst

@@ -11,6 +11,11 @@ Adds options to the :prop_dir:`COMPILE_OPTIONS` directory property.
 These options are used when compiling targets from the current
 directory and below.
 
+.. note::
+
+  These options are not used when linking.
+  See the :command:`add_link_options` command for that.
+
 Arguments
 ^^^^^^^^^
 
@@ -54,3 +59,9 @@ See Also
 
 * The source file property :prop_sf:`COMPILE_OPTIONS` adds options to one
   source file.
+
+* :command:`add_link_options` adds options for linking.
+
+* :variable:`CMAKE_<LANG>_FLAGS` and :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>`
+  add language-wide flags passed to all invocations of the compiler.
+  This includes invocations that drive compiling and those that drive linking.

Help/command/add_link_options.rst

@@ -38,3 +38,7 @@ See Also
 * :command:`link_libraries`
 * :command:`target_link_libraries`
 * :command:`target_link_options`
+
+* :variable:`CMAKE_<LANG>_FLAGS` and :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>`
+  add language-wide flags passed to all invocations of the compiler.
+  This includes invocations that drive compiling and those that drive linking.

Help/command/target_compile_options.rst

@@ -15,6 +15,11 @@ are used when compiling the given ``<target>``, which must have been
 created by a command such as :command:`add_executable` or
 :command:`add_library` and must not be an :ref:`ALIAS target <Alias Targets>`.
 
+.. note::
+
+  These options are not used when linking the target.
+  See the :command:`target_link_options` command for that.
+
 Arguments
 ^^^^^^^^^
 
@@ -60,3 +65,7 @@ See Also
 * :command:`target_link_options`
 * :command:`target_precompile_headers`
 * :command:`target_sources`
+
+* :variable:`CMAKE_<LANG>_FLAGS` and :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>`
+  add language-wide flags passed to all invocations of the compiler.
+  This includes invocations that drive compiling and those that drive linking.

Help/command/target_link_options.rst

@@ -62,3 +62,7 @@ See Also
 * :command:`target_link_directories`
 * :command:`target_precompile_headers`
 * :command:`target_sources`
+
+* :variable:`CMAKE_<LANG>_FLAGS` and :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>`
+  add language-wide flags passed to all invocations of the compiler.
+  This includes invocations that drive compiling and those that drive linking.

Help/variable/CMAKE_LANG_FLAGS.rst

@@ -33,5 +33,5 @@ per-configuration :variable:`CMAKE_<LANG>_FLAGS_<CONFIG>` variable.
 On invocations driving compiling, flags from both variables will be passed
 before flags added by commands such as :command:`add_compile_options` and
 :command:`target_compile_options`. On invocations driving linking,
-they will be passed before before flags added by commands such as
+they will be passed before flags added by commands such as
 :command:`add_link_options` and :command:`target_link_options`.

Help/variable/CMAKE_LANG_FLAGS_CONFIG.rst

@@ -11,6 +11,6 @@ The flags in this variable will be passed after those in the
 :variable:`CMAKE_<LANG>_FLAGS` variable.  On invocations driving compiling,
 flags from both variables will be passed before flags added by commands
 such as :command:`add_compile_options` and :command:`target_compile_options`.
-On invocations driving linking, they will be passed before before flags
-added by commands such as :command:`add_link_options` and
+On invocations driving linking, they will be passed before flags added by
+commands such as :command:`add_link_options` and
 :command:`target_link_options`.