[SYCL] Fix post-commit issues after #7521 (#7825)

Author: Pavel Chupin

sycl/plugins/level_zero/CMakeLists.txt

@@ -16,12 +16,19 @@ if (NOT DEFINED LEVEL_ZERO_LIBRARY OR NOT DEFINED LEVEL_ZERO_INCLUDE_DIR)
     GIT_TAG           ${LEVEL_ZERO_LOADER_TAG}
   )
 
-  # Suppress some pedantic warnings for Level Zero build
+  # Workaround warnings/errors for Level Zero build
   set(CMAKE_CXX_FLAGS_BAK "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-but-set-variable")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pedantic")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-stringop-truncation")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option")
+  if (WIN32)
+    #FIXME: Level Zero build fails with /DUNICODE
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /UUNICODE")
+  else()
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-but-set-variable")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pedantic")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-stringop-truncation")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-parameter")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-c++98-compat-extra-semi")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option")
+  endif()
 
   FetchContent_MakeAvailable(level-zero-loader)
   FetchContent_GetProperties(level-zero-loader)

sycl/plugins/unified_runtime/pi2ur.hpp

@@ -69,6 +69,11 @@ inline pi_result piPlatformGetInfo(pi_platform platform,
                                    pi_platform_info param_name,
                                    size_t param_value_size, void *param_value,
                                    size_t *param_value_size_ret) {
+  (void)platform;
+  (void)param_name;
+  (void)param_value_size;
+  (void)param_value;
+  (void)param_value_size_ret;
   die("Unified Runtime: piPlatformGetInfo is not implemented");
 }
 } // namespace pi2ur

sycl/plugins/unified_runtime/ur/ur.hpp

@@ -11,6 +11,7 @@
 #include <iostream>
 #include <mutex>
 #include <shared_mutex>
+#include <string>
 #include <thread>
 #include <vector>