Use SYCL_EXTERNAL and remove main

Signed-off-by: Steffen Larsen <[email protected]>

Author: steffenlarsen

sycl/test/basic_tests/free_function_queries/free_function_queries_interface.cpp

@@ -53,7 +53,7 @@ template <template <int, bool = true> class Item, int Dims> void test() {
       "Wrong return type of free function query for Item");
 }
 
-void test_all() {
+SYCL_EXTERNAL void test_all() {
   test<sycl::id>(this_id_caller<1>{});
   test<sycl::id>(this_id_caller<2>{});
   test<sycl::id>(this_id_caller<3>{});
@@ -75,12 +75,3 @@ void test_all() {
                    sycl::ext::oneapi::sub_group>::value,
       "Wrong return type of free function query for Sub Group");
 }
-
-int main() {
-  // Test on host.
-  test_all();
-
-  // Test on device.
-  sycl::queue Q;
-  Q.single_task([]() { test_all(); });
-}