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

2 files changed, 24 insertions, 0 deletions

diff --git a/Tests/CMakeCommands/add_link_options/CMakeLists.txt b/Tests/CMakeCommands/add_link_options/CMakeLists.txt
new file mode 100644
index 0000000..bb7dcbb
--- /dev/null
+++ b/Tests/CMakeCommands/add_link_options/CMakeLists.txt
@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.11)
+
+project(add_link_options LANGUAGES C)
+
+
+add_link_options(-LINK_FLAG)
+
+add_executable(add_link_options EXCLUDE_FROM_ALL LinkOptionsExe.c)
+
+get_target_property(result add_link_options LINK_OPTIONS)
+if (NOT result MATCHES "-LINK_FLAG")
+  message(SEND_ERROR "add_link_options not populated the LINK_OPTIONS target property")
+endif()
+
+
+add_library(imp UNKNOWN IMPORTED)
+get_target_property(result imp LINK_OPTIONS)
+if (result)
+  message(FATAL_ERROR "add_link_options populated the LINK_OPTIONS target property")
+endif()
diff --git a/Tests/CMakeCommands/add_link_options/LinkOptionsExe.c b/Tests/CMakeCommands/add_link_options/LinkOptionsExe.c
new file mode 100644
index 0000000..8488f4e
--- /dev/null
+++ b/Tests/CMakeCommands/add_link_options/LinkOptionsExe.c
@@ -0,0 +1,4 @@
+int main(void)
+{
+  return 0;
+}