gui: Enable console on debug builds.

gui/CMakeLists.txt

@@ -72,12 +72,7 @@ include_directories(
     ${QT_INCLUDES}
 )
 
-if (WIN32)
-    # Use Windows subsystem (i.e., no console).
-    set (qapitrace_SUBSYSTEM "WIN32")
-endif ()
-
-add_executable(qapitrace ${qapitrace_SUBSYSTEM} ${qapitrace_SRCS} ${qapitrace_UIS_H})
+add_executable(qapitrace ${qapitrace_SRCS} ${qapitrace_UIS_H})
 
 target_link_libraries (qapitrace
     image
@@ -93,10 +88,15 @@ if (APPLE)
     # Recent builds of Qt no longer support i386 architecture
     set_target_properties (qapitrace PROPERTIES OSX_ARCHITECTURES x86_64)
 endif ()
-if (MSVC)
-    # When the Windows subsystem is chosen by default MSVC expects WinMain()
-    # entry point, but we rather use plain old main() everywhere.
-    set_target_properties (qapitrace PROPERTIES LINK_FLAGS "/ENTRY:mainCRTStartup")
+
+if (WIN32 AND NOT (CMAKE_BUILD_TYPE STREQUAL "Debug"))
+    # Use Windows subsystem (i.e., no console).
+    set_target_properties (qapitrace PROPERTIES CMAKE_WIN32_EXECUTABLE TRUE)
+    if (MSVC)
+        # When the Windows subsystem is chosen by default MSVC expects WinMain()
+        # entry point, but we rather use plain old main() everywhere.
+        set_target_properties (qapitrace PROPERTIES LINK_FLAGS "/ENTRY:mainCRTStartup")
+    endif ()
 endif ()