Fixes: 1) Building fails w/o "CONFIG += strace_win" 2) mingw build

Commenting Mingw release flags section for now. Strace is not reliable with mingw (only calls to other libraries are resolved, internal calls show up as addresses).

src/main.cpp

@@ -154,9 +154,11 @@ void sigsegvHandler(int) {
   std::cerr << "qBittorrent version: " << VERSION << std::endl;
   print_stacktrace();
 #else
+#ifdef STACKTRACE_WIN
   StraceDlg dlg;
   dlg.setStacktraceString(straceWin::getBacktrace());
   dlg.exec();
+#endif
 #endif
   raise(SIGSEGV);
 }
@@ -169,9 +171,11 @@ void sigabrtHandler(int) {
   std::cerr << "qBittorrent version: " << VERSION << std::endl;
   print_stacktrace();
 #else
+#ifdef STACKTRACE_WIN
   StraceDlg dlg;
   dlg.setStacktraceString(straceWin::getBacktrace());
   dlg.exec();
+#endif
 #endif
   raise(SIGABRT);
 }

src/src.pro

@@ -256,7 +256,10 @@ strace_win:win32:{
   
   # Generate debug info in release builds
   release:{
-    win32-g++:QMAKE_CXXFLAGS_RELEASE += -g
+    #win32-g++:{
+    #  QMAKE_CXXFLAGS_RELEASE += -g
+    #  QMAKE_LFLAGS_RELEASE -= -Wl,-s
+    #}
     win32-msvc*:{
       QMAKE_CXXFLAGS_RELEASE += -Zi
       QMAKE_LFLAGS += "/DEBUG"
@@ -264,7 +267,8 @@ strace_win:win32:{
   }
 
   DEFINES += STACKTRACE_WIN
-  LIBS += dbghelp.lib
+  win32-msvc*:LIBS += dbghelp.lib
+  win32-g++:LIBS += libdbghelp
 
   FORMS += stacktrace_win_dlg.ui
   HEADERS += stacktrace_win.h \