add option to build with console subsystem on Wind

CMakeLists.txt

@@ -122,6 +122,7 @@ option(WITH_DEMOS "Install demo songs" ON)
 option(WITH_INSTRUMENTS "Install instruments" ON)
 option(WITH_WAVETABLES "Install wavetables" ON)
 option(SHOW_OPEN_ASSETS_MENU_ENTRY "Show option to open built-in assets directory (on supported platforms)" OFF)
+option(CONSOLE_SUBSYSTEM "Build Furnace with Console subsystem on Windows" OFF)
 if (APPLE)
   option(FORCE_APPLE_BIN "Force enable binary installation to /bin" OFF)
 else()
@@ -1128,9 +1129,13 @@ if (NOT ANDROID OR TERMUX)
   endif()
 endif()
 
+if (WIN32 AND CONSOLE_SUBSYSTEM)
+  list(APPEND DEPENDENCIES_DEFINES "TA_SUBSYSTEM_CONSOLE")
+endif()
+
 if(ANDROID AND NOT TERMUX)
   add_library(furnace SHARED ${USED_SOURCES})
-elseif(WIN32)
+elseif(WIN32 AND NOT CONSOLE_SUBSYSTEM)
   add_executable(furnace WIN32 ${USED_SOURCES})
 else()
   add_executable(furnace ${USED_SOURCES})

src/gui/gui.h

@@ -2665,6 +2665,7 @@ class FurnaceGUI {
   void drawMacros(std::vector<FurnaceGUIMacroDesc>& macros, FurnaceGUIMacroEditState& state);
   void alterSampleMap(int column, int val);
 
+  void insTabFM(DivInstrument* ins);
   void insTabSample(DivInstrument* ins);
 
   void drawOrderButtons();

src/main.cpp

@@ -451,12 +451,13 @@ int main(int argc, char** argv) {
 
   // Windows console thing - thanks dj.tuBIG/MaliceX
 #ifdef _WIN32
-
+#ifndef TA_SUBSYSTEM_CONSOLE
   if (AttachConsole(ATTACH_PARENT_PROCESS)) {
     freopen("CONOUT$", "w", stdout);
     freopen("CONOUT$", "w", stderr);
     freopen("CONIN$", "r", stdin);
   }
+#endif
 #endif
 
   srand(time(NULL));