cmake: disable network trace

Add cmake toggle to disable network trace.
Disable network trace for QNX and yocto.
Deactivate DLT_TRACE_NETWORK_SEGMENTED macro
via an empty dlt_user_trace_network_segmented
function to support someip build.

Signed-off-by: Alexander Mohr <alexander.m.mohr@mercedes-benz.com>

CMakeLists.txt

@@ -56,7 +56,7 @@ option(WITH_TESTSCRIPTS       "Set to ON to run CMakeLists.txt in testscripts"
 option(WITH_GPROF             "Set -pg to compile flags"                                                         OFF)
 option(WITH_DLTTEST           "Set to ON to build with modifications to test User-Daemon communication with corrupt messages" OFF)
 option(WITH_DLT_SHM_ENABLE    "EXPERIMENTAL! Set to ON to use shared memory as IPC. EXPERIMENTAL!"               OFF)
-option(WITH_DLT_ADAPTOR       "Set to ON to build src/adaptor binaries"                                          OFF) 
+option(WITH_DLT_ADAPTOR       "Set to ON to build src/adaptor binaries"                                          OFF)
 option(WITH_DLT_ADAPTOR_STDIN "Set to ON to build src/adaptor/stdin binaries"                                    OFF)
 option(WITH_DLT_ADAPTOR_UDP   "Set to ON to build src/adaptor/udp binaries"                                      OFF)
 option(WITH_DLT_CONSOLE       "Set to ON to build src/console binaries"                                          ON)
@@ -360,6 +360,7 @@ message(STATUS "DLT_VSOCK_PORT = ${DLT_VSOCK_PORT}")
 message(STATUS "WITH_UDP_CONNECTION = ${WITH_UDP_CONNECTION}")
 message(STATUS "WITH_DLT_QNX_SYSTEM = ${WITH_DLT_QNX_SYSTEM}")
 message(STATUS "WITH_DLT_NETWORK_TRACE = ${WITH_DLT_NETWORK_TRACE}")
+message(STATUS "WITH_DLT_USE_EPOLL = ${WITH_DLT_USE_EPOLL}")
 message(STATUS "WITH_LIB_SHORT_VERSION = ${WITH_LIB_SHORT_VERSION}")
 message(STATUS "WITH_LEGACY_INCLUDE_PATH = ${WITH_LEGACY_INCLUDE_PATH}")
 message(STATUS "WITH_EXTENDED_FILTERING = ${WITH_EXTENDED_FILTERING}")

src/lib/dlt_user.c

@@ -3465,6 +3465,28 @@ DltReturnValue dlt_user_trace_network_truncated(DltContext *handle,
 
     return DLT_RETURN_OK;
 }
+#else  /* DLT_NETWORK_TRACE_ENABLE not set */
+DltReturnValue dlt_user_trace_network_segmented(DltContext *handle,
+                                                DltNetworkTraceType nw_trace_type,
+                                                uint16_t header_len,
+                                                void *header,
+                                                uint16_t payload_len,
+                                                void *payload)
+{
+    /**
+     *  vsomeip uses the DLT_TRACE_NETWORK_SEGMENTED macro that calls this function.
+     *  It's not possible to rewrite this macro directly to a no-op,
+     *  because the macro is used on vsomeip side and there our defines are not set.
+     *  Add an empty function to the dlt-lib to avoid a broken build.
+     */
+    (void)handle;
+    (void)nw_trace_type;
+    (void)header_len;
+    (void)header;
+    (void)payload_len;
+    (void)payload;
+    return DLT_RETURN_OK;
+}
 #endif /* DLT_NETWORK_TRACE_ENABLE */
 
 DltReturnValue dlt_log_string(DltContext *handle, DltLogLevelType loglevel, const char *text)