Qt: Ensure SIGCHLD is ignored properly

src/duckstation-qt/qthost.cpp

@@ -2634,11 +2634,12 @@ void QtHost::HookSignals()
   std::signal(SIGINT, SignalHandler);
   std::signal(SIGTERM, SignalHandler);
 
-#ifdef __linux__
+#ifndef _WIN32
   // Ignore SIGCHLD by default on Linux, since we kick off aplay asynchronously.
   struct sigaction sa_chld = {};
   sigemptyset(&sa_chld.sa_mask);
-  sa_chld.sa_flags = SA_SIGINFO | SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
+  sa_chld.sa_handler = SIG_IGN;
+  sa_chld.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
   sigaction(SIGCHLD, &sa_chld, nullptr);
 #endif
 }

src/duckstation-regtest/regtest_host.cpp

@@ -616,6 +616,15 @@ void RegTestHost::HookSignals()
 {
   std::signal(SIGINT, SignalHandler);
   std::signal(SIGTERM, SignalHandler);
+
+#ifndef _WIN32
+  // Ignore SIGCHLD by default on Linux, since we kick off aplay asynchronously.
+  struct sigaction sa_chld = {};
+  sigemptyset(&sa_chld.sa_mask);
+  sa_chld.sa_handler = SIG_IGN;
+  sa_chld.sa_flags = SA_RESTART | SA_NOCLDSTOP | SA_NOCLDWAIT;
+  sigaction(SIGCHLD, &sa_chld, nullptr);
+#endif
 }
 
 void RegTestHost::GPUThreadEntryPoint()