Adding IREE_TARGET_GUI_LINKOPTS to remove custom linkopts use.

build_tools/cmake/iree_copts.cmake

diff --git a/build_tools/cmake/iree_copts.cmake b/build_tools/cmake/iree_copts.cmake
index 9b84ae2..6ad259f 100644
--- a/build_tools/cmake/iree_copts.cmake
+++ b/build_tools/cmake/iree_copts.cmake
@@ -293,6 +293,14 @@
     ${_IREE_PTHREADS_LINKOPTS}
 )
 
+# Add to LINKOPTS on a binary to configure it for X/Wayland/Windows/etc
+# depending on the target cross-compilation platform.
+if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
+  set(IREE_TARGET_GUI_LINKOPTS "-SUBSYSTEM:WINDOWS")
+else()
+  set(IREE_TARGET_GUI_LINKOPTS "")
+endif()
+
 # TODO(benvanik): remove the ABSL usage here; we aren't abseil.
 set(IREE_TEST_COPTS "${ABSL_TEST_COPTS}")
 

iree/samples/vulkan/CMakeLists.txt

diff --git a/iree/samples/vulkan/CMakeLists.txt b/iree/samples/vulkan/CMakeLists.txt
index c3de407..960c0e5 100644
--- a/iree/samples/vulkan/CMakeLists.txt
+++ b/iree/samples/vulkan/CMakeLists.txt
@@ -39,12 +39,6 @@
   return()
 endif()
 
-if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
-  set(_GUI_LINKOPTS "-SUBSYSTEM:WINDOWS")
-else()
-  set(_GUI_LINKOPTS "")
-endif()
-
 iree_cc_binary(
   NAME
     vulkan_inference_gui
@@ -60,5 +54,5 @@
     iree::vm::bytecode_module
     iree::vm::ref_cc
   LINKOPTS
-    "${_GUI_LINKOPTS}"
+    "${IREE_TARGET_GUI_LINKOPTS}"
 )

iree/testing/vulkan/CMakeLists.txt

diff --git a/iree/testing/vulkan/CMakeLists.txt b/iree/testing/vulkan/CMakeLists.txt
index 6ceb5dc..f9257bb 100644
--- a/iree/testing/vulkan/CMakeLists.txt
+++ b/iree/testing/vulkan/CMakeLists.txt
@@ -45,12 +45,6 @@
     Vulkan::Vulkan
 )
 
-if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
-  set(_GUI_LINKOPTS "-SUBSYSTEM:WINDOWS")
-else()
-  set(_GUI_LINKOPTS "")
-endif()
-
 iree_cc_binary(
   NAME
     iree-run-module-vulkan-gui
@@ -70,5 +64,5 @@
     iree::vm
     iree::vm::bytecode_module
   LINKOPTS
-    "${_GUI_LINKOPTS}"
+    "${IREE_TARGET_GUI_LINKOPTS}"
 )