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, 26 insertions, 0 deletions

diff --git a/Tests/CMakeCommands/target_link_options/CMakeLists.txt b/Tests/CMakeCommands/target_link_options/CMakeLists.txt
new file mode 100644
index 0000000..c66cd37
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_options/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+cmake_minimum_required(VERSION 3.11)
+
+project(target_link_options LANGUAGES C)
+
+add_library(target_link_options SHARED LinkOptionsLib.c)
+# Test no items
+target_link_options(target_link_options PRIVATE)
+
+add_library(target_link_options_2 SHARED EXCLUDE_FROM_ALL LinkOptionsLib.c)
+target_link_options(target_link_options_2 PRIVATE -PRIVATE_FLAG INTERFACE -INTERFACE_FLAG)
+get_target_property(result target_link_options_2 LINK_OPTIONS)
+if (NOT result MATCHES "-PRIVATE_FLAG")
+  message(SEND_ERROR "target_link_options not populated the LINK_OPTIONS target property")
+endif()
+get_target_property(result target_link_options_2 INTERFACE_LINK_OPTIONS)
+if (NOT result MATCHES "-INTERFACE_FLAG")
+  message(SEND_ERROR "target_link_options not populated the INTERFACE_LINK_OPTIONS target property")
+endif()
diff --git a/Tests/CMakeCommands/target_link_options/LinkOptionsLib.c b/Tests/CMakeCommands/target_link_options/LinkOptionsLib.c
new file mode 100644
index 0000000..9bbd24c
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_options/LinkOptionsLib.c
@@ -0,0 +1,7 @@
+#if defined(_WIN32)
+__declspec(dllexport)
+#endif
+  int flags_lib(void)
+{
+  return 0;
+}