Added conditional compilation to avoid building Linux code on non-Linux systems

Signed-off-by: Nathan Baker <[email protected]>

Author: Nathan Baker

userspace/libsinsp/examples/CMakeLists.txt

@@ -15,7 +15,13 @@
 
 include(jsoncpp)
 
-add_executable(sinsp-example util.cpp test.cpp cpu_usage.cpp)
+set(sources util.cpp test.cpp)
+
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+	set(sources ${sources} cpu_usage.cpp)
+endif()
+
+add_executable(sinsp-example ${sources})
 
 target_link_libraries(sinsp-example sinsp)
 

userspace/libsinsp/examples/test.cpp

@@ -43,8 +43,10 @@ extern "C" {
 
 using namespace std;
 
+#if __linux__
 // Utility function to calculate CPU usage
 int get_cpu_usage_percent();
+#endif // __linux__
 
 // Functions used for dumping to stdout
 void raw_dump(sinsp&, sinsp_evt* ev);
@@ -547,6 +549,7 @@ int main(int argc, char** argv) {
 			++num_events;
 			uint64_t evt_diff = num_events - last_events;
 			if(perftest) {
+#if __linux__
 				// Perftest mode does not print individual events but instead prints a running throughput every second
 				if(ts_ns - last_ts_ns > 1'000'000'000) {
 					int cpu_usage = get_cpu_usage_percent();
@@ -560,6 +563,18 @@ int main(int argc, char** argv) {
 					}
 					last_ts_ns = ts_ns;
 					last_events = num_events;
+#else  // __linux__
+				if(ts_ns - last_ts_ns > 1'000'000'000) {
+					++num_samples;
+					long double curr_throughput = evt_diff / (long double)1000;
+					std::cout << "Events: " << (num_events - last_events) << " Events/ms: " << curr_throughput
+					          << "                      \r" << std::flush;
+					if(curr_throughput > max_throughput) {
+						max_throughput = curr_throughput;
+					}
+					last_ts_ns = ts_ns;
+					last_events = num_events;
+#endif // __linux__
 				}
 			} else if(!thread || g_all_threads || thread->is_main_thread()) {
 				dump(inspector, ev);