Only disable warnings where it makes sense

Author: Alexander Batashev

sycl/cmake/modules/AddSYCLUnitTest.cmake

@@ -24,7 +24,6 @@ macro(add_sycl_unittest test_dirname link_variant)
 
     get_target_property(SYCL_LINK_LIBS ${sycl_so_target} LINK_LIBRARIES)
   endif()
-  target_compile_definitions(${test_dirname} PRIVATE SYCL2020_DISABLE_DEPRECATION_WARNINGS)
 
   target_link_libraries(${test_dirname}
     PRIVATE
@@ -74,7 +73,6 @@ macro(add_sycl_unittest_with_device test_dirname link_variant)
     -DGTEST_LANG_CXX11=1
     -DGTEST_HAS_TR1_TUPLE=0
     -D__SYCL_BUILD_SYCL_DLL
-    -DSYCL2020_DISABLE_DEPRECATION_WARNINGS
     -I${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include
     -I${LLVM_MAIN_SRC_DIR}/utils/unittest/googlemock/include
     -I${LLVM_BINARY_DIR}/include

sycl/unittests/kernel-and-program/Cache.cpp

@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#define SYCL2020_DISABLE_DEPRECATION_WARNINGS
+
 #include "CL/sycl/detail/pi.h"
 #include "detail/context_impl.hpp"
 #include "detail/kernel_program_cache.hpp"