1 files changed, 45 insertions, 0 deletions
diff --git a/Modules/CheckLinkerFlag.cmake b/Modules/CheckLinkerFlag.cmake
new file mode 100644
index 0000000..8319216
--- /dev/null
+++ b/Modules/CheckLinkerFlag.cmake
@@ -0,0 +1,45 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+CheckLinkerFlag
+---------------
+
+.. versionadded:: 3.18
+
+Check whether the compiler supports a given link flag.
+
+.. command:: check_linker_flag
+
+  .. code-block:: cmake
+
+    check_linker_flag(<lang> <flag> <var>)
+
+Check that the link ``<flag>`` is accepted by the ``<lang>`` compiler without
+a diagnostic.  Stores the result in an internal cache entry named ``<var>``.
+
+This command temporarily sets the ``CMAKE_REQUIRED_LINK_OPTIONS`` variable
+and calls the :command:`check_source_compiles` command from the
+:module:`CheckSourceCompiles` module.  See that module's documentation
+for a listing of variables that can otherwise modify the build.
+
+The underlying implementation relies on the :prop_tgt:`LINK_OPTIONS` property
+to check the specified flag. The ``LINKER:`` prefix, as described in the
+:command:`target_link_options` command, can be used as well.
+
+A positive result from this check indicates only that the compiler did not
+issue a diagnostic message when given the link flag.  Whether the flag has any
+effect or even a specific one is beyond the scope of this module.
+
+.. note::
+  Since the :command:`try_compile` command forwards flags from variables
+  like :variable:`CMAKE_<LANG>_FLAGS`, unknown flags in such variables may
+  cause a false negative for this check.
+#]=======================================================================]
+
+include_guard(GLOBAL)
+include(Internal/CheckLinkerFlag)
+
+function(CHECK_LINKER_FLAG _lang _flag _var)
+  cmake_check_linker_flag(${_lang} "${_flag}" ${_var})
+endfunction()