Make runtime tracing toggleable for backwards compatibility

Adds the cmake option `ENABLE_RUNTIME_TRACING`

BUILD.md

@@ -32,6 +32,9 @@ cd boost
 ### Dependencies
 
 The HEAD of this repo is compatible with the latest Level Zero Loader release. Please report incompatibilities at https://github.com/oneapi-src/level-zero-tests/issues.
+
+To build against loader releases prior to [v1.15.7](https://github.com/oneapi-src/level-zero/releases/tag/v1.15.7), add the cmake flag `-DENABLE_RUNTIME_TRACING=OFF`.
+
 You can either build against the version you have installed on your system (automatic, Linux only), 
 or specify an install prefix with the `CMAKE_PREFIX_PATH` cmake flag during configuration.
 This `CMAKE_PREFIX_PATH` must point to the top-level install directory where level-zero was installed.

layer_tests/tracing/CMakeLists.txt

@@ -7,6 +7,11 @@ set(ipc_libraries
   Boost::system
 )
 
+option(ENABLE_RUNTIME_TRACING "Enable runtime tracing" ON)
+if(ENABLE_RUNTIME_TRACING)
+  set(defines_runtime_tracing USE_RUNTIME_TRACING)
+endif()
+
 if(UNIX)
     list(APPEND ipc_event_libraries rt)
 endif()
@@ -37,7 +42,7 @@ add_lzt_test(
     ${ipc_libraries}
     ${ipc_event_libraries}
     level_zero_tests::net
-  DEFINES USE_RUNTIME_TRACING
+  DEFINES ${defines_runtime_tracing}
 )
 
 add_lzt_test_executable(
@@ -62,7 +67,7 @@ add_lzt_test_executable(
     ${ipc_libraries}
     ${ipc_event_libraries}
     level_zero_tests::net
-  DEFINES USE_RUNTIME_TRACING
+  DEFINES ${defines_runtime_tracing}
 )
 
 add_lzt_test_executable(
@@ -87,5 +92,5 @@ add_lzt_test_executable(
     ${ipc_libraries}
     ${ipc_event_libraries}
     level_zero_tests::net
-  DEFINES USE_RUNTIME_TRACING
+  DEFINES ${defines_runtime_tracing}
 )