SCons: Re-enable treating `#warning` as error with `werror`

Replace all TODO uses of `#warning` by proper TODO comments, and will open
matching bug reports to keep track of them.

We don't have a great track record fixing TODOs, but I'd wager we're even
worse for fixing these "TODO #warning" so we should prohibit this usage.

24 files changed, 32 insertions, 106 deletions

diff --git a/SConstruct b/SConstruct
index 77172d4d4c..2c5b34854e 100644
--- a/SConstruct
+++ b/SConstruct
@@ -732,12 +732,6 @@ if selected_platform in platform_list:
         if env["werror"]:
             env.Append(CCFLAGS=["-Werror"])
 
-            # FIXME: Temporary workaround after the Vulkan merge, remove once warnings are fixed.
-            if methods.using_gcc(env):
-                env.Append(CXXFLAGS=["-Wno-error=cpp"])
-            elif methods.using_clang(env) or methods.using_emcc(env):
-                env.Append(CXXFLAGS=["-Wno-error=#warnings"])
-
     if hasattr(detect, "get_program_suffix"):
         suffix = "." + detect.get_program_suffix()
     else:
diff --git a/core/object/script_language_extension.h b/core/object/script_language_extension.h
index 7e74f6a2be..15e2d57a3a 100644
--- a/core/object/script_language_extension.h
+++ b/core/object/script_language_extension.h
@@ -82,9 +82,7 @@ public:
 		GDVIRTUAL_REQUIRED_CALL(_get_documentation, doc);
 
 		Vector<DocData::ClassDoc> class_doc;
-#ifndef _MSC_VER
-#warning missing conversion from documentation to ClassDoc
-#endif
+		// TODO: Missing conversion from documentation to ClassDoc.
 		return class_doc;
 	}
 #endif // TOOLS_ENABLED
diff --git a/drivers/vulkan/rendering_device_vulkan.cpp b/drivers/vulkan/rendering_device_vulkan.cpp
index 9b193056c2..74bcc7cbff 100644
--- a/drivers/vulkan/rendering_device_vulkan.cpp
+++ b/drivers/vulkan/rendering_device_vulkan.cpp
@@ -1655,9 +1655,7 @@ RID RenderingDeviceVulkan::texture_create(const TextureFormat &p_format, const T
 	image_create_info.pNext = nullptr;
 	image_create_info.flags = 0;
 
-#ifndef _MSC_VER
-#warning TODO check for support via RenderingDevice to enable on mobile when possible
-#endif
+	// TODO: Check for support via RenderingDevice to enable on mobile when possible.
 
 #ifndef ANDROID_ENABLED
 
diff --git a/editor/create_dialog.cpp b/editor/create_dialog.cpp
index ceca428306..7a4e58c6f9 100644
--- a/editor/create_dialog.cpp
+++ b/editor/create_dialog.cpp
@@ -752,9 +752,7 @@ CreateDialog::CreateDialog() {
 	favorites->connect("cell_selected", callable_mp(this, &CreateDialog::_favorite_selected));
 	favorites->connect("item_activated", callable_mp(this, &CreateDialog::_favorite_activated));
 	favorites->add_theme_constant_override("draw_guides", 1);
-#ifndef _MSC_VER
-#warning cannot forward drag data to a non control, must be fixed
-#endif
+	// Cannot forward drag data to a non control, must be fixed.
 	//favorites->set_drag_forwarding(this);
 	fav_vb->add_margin_child(TTR("Favorites:"), favorites, true);
 
diff --git a/editor/export/project_export.cpp b/editor/export/project_export.cpp
index 05a17c9951..9b5e76bcd7 100644
--- a/editor/export/project_export.cpp
+++ b/editor/export/project_export.cpp
@@ -1015,9 +1015,7 @@ ProjectExportDialog::ProjectExportDialog() {
 	preset_vb->add_child(mc);
 	mc->set_v_size_flags(Control::SIZE_EXPAND_FILL);
 	presets = memnew(ItemList);
-#ifndef _MSC_VER
-#warning must reimplement drag forward
-#endif
+	// TODO: Must reimplement drag forwarding.
 	//presets->set_drag_forwarding(this);
 	mc->add_child(presets);
 	presets->connect("item_selected", callable_mp(this, &ProjectExportDialog::_edit_preset));
diff --git a/editor/plugins/node_3d_editor_plugin.cpp b/editor/plugins/node_3d_editor_plugin.cpp
index 4430877b8a..7a21397910 100644
--- a/editor/plugins/node_3d_editor_plugin.cpp
+++ b/editor/plugins/node_3d_editor_plugin.cpp
@@ -4773,9 +4773,8 @@ Node3DEditorViewport::Node3DEditorViewport(Node3DEditor *p_spatial_editor, int p
 	view_menu->get_popup()->connect("id_pressed", callable_mp(this, &Node3DEditorViewport::_menu_option));
 	display_submenu->connect("id_pressed", callable_mp(this, &Node3DEditorViewport::_menu_option));
 	view_menu->set_disable_shortcuts(true);
-#ifndef _MSC_VER
-#warning this needs to be fixed
-#endif
+
+	// TODO: Re-evaluate with new OpenGL3 renderer, and implement.
 	//if (OS::get_singleton()->get_current_video_driver() == OS::VIDEO_DRIVER_GLES2) {
 	if (false) {
 		// Alternate display modes only work when using the Vulkan renderer; make this explicit.
diff --git a/modules/gltf/gltf_document.cpp b/modules/gltf/gltf_document.cpp
index 8272db9018..6700b6de0a 100644
--- a/modules/gltf/gltf_document.cpp
+++ b/modules/gltf/gltf_document.cpp
@@ -2590,10 +2590,7 @@ Error GLTFDocument::_parse_meshes(Ref<GLTFState> state) {
 					Mesh::PRIMITIVE_TRIANGLES, // 4 TRIANGLES
 					Mesh::PRIMITIVE_TRIANGLE_STRIP, // 5 TRIANGLE_STRIP
 					Mesh::PRIMITIVE_TRIANGLES, // 6 TRIANGLE_FAN fan not supported, should be converted
-#ifndef _MSC_VER
-#warning line loop and triangle fan are not supported and need to be converted to lines and triangles
-#endif
-
+					// TODO: Line loop and triangle fan are not supported and need to be converted to lines and triangles.
 				};
 
 				primitive = primitives2[mode];
diff --git a/platform/android/api/jni_singleton.h b/platform/android/api/jni_singleton.h
index 690fddae21..895bc70103 100644
--- a/platform/android/api/jni_singleton.h
+++ b/platform/android/api/jni_singleton.h
@@ -150,9 +150,8 @@ public:
 				env->DeleteLocalRef(arr);
 			} break;
 
-#ifndef _MSC_VER
-#warning This is missing 64 bits arrays, I have no idea how to do it in JNI
-#endif
+				// TODO: This is missing 64 bits arrays, I have no idea how to do it in JNI.
+
 			case Variant::DICTIONARY: {
 				jobject obj = env->CallObjectMethodA(instance, E->get().method, v);
 				ret = _jobject_to_variant(env, obj);
diff --git a/platform/android/jni_utils.cpp b/platform/android/jni_utils.cpp
index 193ef61264..d46b4f39de 100644
--- a/platform/android/jni_utils.cpp
+++ b/platform/android/jni_utils.cpp
@@ -167,9 +167,8 @@ jvalret _variant_to_jvalue(JNIEnv *env, Variant::Type p_type, const Variant *p_a
 			v.obj = arr;
 
 		} break;
-#ifndef _MSC_VER
-#warning This is missing 64 bits arrays, I have no idea how to do it in JNI
-#endif
+
+			// TODO: This is missing 64 bits arrays, I have no idea how to do it in JNI.
 
 		default: {
 			v.val.i = 0;
diff --git a/platform/linuxbsd/display_server_x11.cpp b/platform/linuxbsd/display_server_x11.cpp
index 5256d91a80..e0963f42ce 100644
--- a/platform/linuxbsd/display_server_x11.cpp
+++ b/platform/linuxbsd/display_server_x11.cpp
@@ -1202,16 +1202,6 @@ float DisplayServerX11::screen_get_refresh_rate(int p_screen) const {
 	return SCREEN_REFRESH_RATE_FALLBACK;
 }
 
-bool DisplayServerX11::screen_is_touchscreen(int p_screen) const {
-	_THREAD_SAFE_METHOD_
-
-#ifndef _MSC_VER
-#warning Need to get from proper window
-#endif
-
-	return DisplayServer::screen_is_touchscreen(p_screen);
-}
-
 #ifdef DBUS_ENABLED
 void DisplayServerX11::screen_set_keep_on(bool p_enable) {
 	if (screen_is_kept_on() == p_enable) {
diff --git a/platform/linuxbsd/display_server_x11.h b/platform/linuxbsd/display_server_x11.h
index a5fa7613bc..5723abc751 100644
--- a/platform/linuxbsd/display_server_x11.h
+++ b/platform/linuxbsd/display_server_x11.h
@@ -349,7 +349,6 @@ public:
 	virtual Rect2i screen_get_usable_rect(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 	virtual int screen_get_dpi(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 	virtual float screen_get_refresh_rate(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
-	virtual bool screen_is_touchscreen(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 
 #if defined(DBUS_ENABLED)
 	virtual void screen_set_keep_on(bool p_enable) override;
diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index 16853a0be7..3b773685c3 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -561,20 +561,6 @@ float DisplayServerWindows::screen_get_refresh_rate(int p_screen) const {
 	return data.rate;
 }
 
-bool DisplayServerWindows::screen_is_touchscreen(int p_screen) const {
-#ifndef _MSC_VER
-#warning touchscreen not working
-#endif
-	return DisplayServer::screen_is_touchscreen(p_screen);
-}
-
-void DisplayServerWindows::screen_set_orientation(ScreenOrientation p_orientation, int p_screen) {
-}
-
-DisplayServer::ScreenOrientation DisplayServerWindows::screen_get_orientation(int p_screen) const {
-	return SCREEN_LANDSCAPE;
-}
-
 void DisplayServerWindows::screen_set_keep_on(bool p_enable) {
 	if (keep_screen_on == p_enable) {
 		return;
diff --git a/platform/windows/display_server_windows.h b/platform/windows/display_server_windows.h
index 3523e8b3d1..6403b57d8d 100644
--- a/platform/windows/display_server_windows.h
+++ b/platform/windows/display_server_windows.h
@@ -516,10 +516,6 @@ public:
 	virtual Rect2i screen_get_usable_rect(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 	virtual int screen_get_dpi(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 	virtual float screen_get_refresh_rate(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
-	virtual bool screen_is_touchscreen(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
-
-	virtual void screen_set_orientation(ScreenOrientation p_orientation, int p_screen = SCREEN_OF_MAIN_WINDOW) override;
-	virtual ScreenOrientation screen_get_orientation(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
 
 	virtual void screen_set_keep_on(bool p_enable) override; //disable screensaver
 	virtual bool screen_is_kept_on() const override;
diff --git a/scene/2d/skeleton_2d.cpp b/scene/2d/skeleton_2d.cpp
index dd016d5e92..f80b2a07c9 100644
--- a/scene/2d/skeleton_2d.cpp
+++ b/scene/2d/skeleton_2d.cpp
@@ -192,10 +192,8 @@ void Bone2D::_notification(int p_what) {
 			cache_transform = tmp_trans;
 		} break;
 
-		// Bone2D Editor gizmo drawing:
-#ifndef _MSC_VER
-#warning TODO Bone2D gizmo drawing needs to be moved to an editor plugin
-#endif
+		// Bone2D Editor gizmo drawing.
+		// TODO: Bone2D gizmo drawing needs to be moved to an editor plugin.
 		case NOTIFICATION_DRAW: {
 			// Only draw the gizmo in the editor!
 			if (Engine::get_singleton()->is_editor_hint() == false) {
diff --git a/scene/2d/sprite_2d.cpp b/scene/2d/sprite_2d.cpp
index 0ecf8333a0..08068acf7d 100644
--- a/scene/2d/sprite_2d.cpp
+++ b/scene/2d/sprite_2d.cpp
@@ -309,9 +309,7 @@ bool Sprite2D::is_pixel_opaque(const Point2 &p_point) const {
 		q.y = 1.0f - q.y;
 	}
 	q = q * src_rect.size + src_rect.position;
-#ifndef _MSC_VER
-#warning this need to be obtained from CanvasItem new repeat mode (but it needs to guess it from hierarchy, need to add a function for that)
-#endif
+	// TODO: This need to be obtained from CanvasItem new repeat mode (but it needs to guess it from hierarchy, need to add a function for that).
 	bool is_repeat = false;
 	bool is_mirrored_repeat = false;
 	if (is_repeat) {
diff --git a/scene/gui/color_picker.cpp b/scene/gui/color_picker.cpp
index f1e18640e6..a2c138c0b2 100644
--- a/scene/gui/color_picker.cpp
+++ b/scene/gui/color_picker.cpp
@@ -1403,9 +1403,7 @@ void ColorPicker::_screen_pick_pressed() {
 		screen->show();
 	}
 	screen->move_to_front();
-#ifndef _MSC_VER
-#warning show modal no longer works, needs to be converted to a popup
-#endif
+	// TODO: show modal no longer works, needs to be converted to a popup.
 	//screen->show_modal();
 }
 
diff --git a/scene/resources/animation.cpp b/scene/resources/animation.cpp
index 2bcf569f4e..dfd9c6eb2f 100644
--- a/scene/resources/animation.cpp
+++ b/scene/resources/animation.cpp
@@ -5239,9 +5239,7 @@ bool Animation::_fetch_compressed(uint32_t p_compressed_track, double p_time, Ve
 
 	double page_base_time = compression.pages[page_index].time_offset;
 	const uint8_t *page_data = compression.pages[page_index].data.ptr();
-#ifndef _MSC_VER
-#warning Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported
-#endif
+	// Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported.
 	const uint32_t *indices = (const uint32_t *)page_data;
 	const uint16_t *time_keys = (const uint16_t *)&page_data[indices[p_compressed_track * 3 + 0]];
 	uint32_t time_key_count = indices[p_compressed_track * 3 + 1];
@@ -5384,9 +5382,7 @@ void Animation::_get_compressed_key_indices_in_range(uint32_t p_compressed_track
 
 		double page_base_time = compression.pages[page_index].time_offset;
 		const uint8_t *page_data = compression.pages[page_index].data.ptr();
-#ifndef _MSC_VER
-#warning Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported
-#endif
+		// Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported.
 		const uint32_t *indices = (const uint32_t *)page_data;
 		const uint16_t *time_keys = (const uint16_t *)&page_data[indices[p_compressed_track * 3 + 0]];
 		uint32_t time_key_count = indices[p_compressed_track * 3 + 1];
@@ -5456,9 +5452,7 @@ int Animation::_get_compressed_key_count(uint32_t p_compressed_track) const {
 
 	for (uint32_t i = 0; i < compression.pages.size(); i++) {
 		const uint8_t *page_data = compression.pages[i].data.ptr();
-#ifndef _MSC_VER
-#warning Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported
-#endif
+		// Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported.
 		const uint32_t *indices = (const uint32_t *)page_data;
 		const uint16_t *time_keys = (const uint16_t *)&page_data[indices[p_compressed_track * 3 + 0]];
 		uint32_t time_key_count = indices[p_compressed_track * 3 + 1];
@@ -5492,9 +5486,7 @@ bool Animation::_fetch_compressed_by_index(uint32_t p_compressed_track, int p_in
 
 	for (uint32_t i = 0; i < compression.pages.size(); i++) {
 		const uint8_t *page_data = compression.pages[i].data.ptr();
-#ifndef _MSC_VER
-#warning Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported
-#endif
+		// Little endian assumed. No major big endian hardware exists any longer, but in case it does it will need to be supported.
 		const uint32_t *indices = (const uint32_t *)page_data;
 		const uint16_t *time_keys = (const uint16_t *)&page_data[indices[p_compressed_track * 3 + 0]];
 		uint32_t time_key_count = indices[p_compressed_track * 3 + 1];
diff --git a/scene/resources/mesh.cpp b/scene/resources/mesh.cpp
index 03ccae5b74..706db3af16 100644
--- a/scene/resources/mesh.cpp
+++ b/scene/resources/mesh.cpp
@@ -1576,9 +1576,8 @@ void ArrayMesh::_recompute_aabb() {
 		}
 	}
 }
-#ifndef _MSC_VER
-#warning need to add binding to add_surface using future MeshSurfaceData object
-#endif
+
+// TODO: Need to add binding to add_surface using future MeshSurfaceData object.
 void ArrayMesh::add_surface(uint32_t p_format, PrimitiveType p_primitive, const Vector<uint8_t> &p_array, const Vector<uint8_t> &p_attribute_array, const Vector<uint8_t> &p_skin_array, int p_vertex_count, const Vector<uint8_t> &p_index_array, int p_index_count, const AABB &p_aabb, const Vector<uint8_t> &p_blend_shape_data, const Vector<AABB> &p_bone_aabbs, const Vector<RS::SurfaceData::LOD> &p_lods) {
 	_create_if_empty();
 
diff --git a/scene/resources/visual_shader.cpp b/scene/resources/visual_shader.cpp
index df9addb6bb..640f6dfcb7 100644
--- a/scene/resources/visual_shader.cpp
+++ b/scene/resources/visual_shader.cpp
@@ -1509,11 +1509,10 @@ bool VisualShader::_get(const StringName &p_name, Variant &r_ret) const {
 }
 
 void VisualShader::reset_state() {
-#ifndef _MSC_VER
-#warning everything needs to be cleared here
-#endif
+	// TODO: Everything needs to be cleared here.
 	emit_changed();
 }
+
 void VisualShader::_get_property_list(List<PropertyInfo> *p_list) const {
 	//mode
 	p_list->push_back(PropertyInfo(Variant::INT, PNAME("mode"), PROPERTY_HINT_ENUM, "Node3D,CanvasItem,Particles,Sky,Fog"));
diff --git a/servers/rendering/renderer_rd/pipeline_cache_rd.cpp b/servers/rendering/renderer_rd/pipeline_cache_rd.cpp
index 9151c53823..7a2336970b 100644
--- a/servers/rendering/renderer_rd/pipeline_cache_rd.cpp
+++ b/servers/rendering/renderer_rd/pipeline_cache_rd.cpp
@@ -29,6 +29,7 @@
 /*************************************************************************/
 
 #include "pipeline_cache_rd.h"
+
 #include "core/os/memory.h"
 
 RID PipelineCacheRD::_generate_version(RD::VertexFormatID p_vertex_format_id, RD::FramebufferFormatID p_framebuffer_format_id, bool p_wireframe, uint32_t p_render_pass, uint32_t p_bool_specializations) {
@@ -70,9 +71,7 @@ RID PipelineCacheRD::_generate_version(RD::VertexFormatID p_vertex_format_id, RD
 }
 
 void PipelineCacheRD::_clear() {
-#ifndef _MSC_VER
-#warning Clear should probably recompile all the variants already compiled instead to avoid stalls? needs discussion
-#endif
+	// TODO: Clear should probably recompile all the variants already compiled instead to avoid stalls? Needs discussion.
 	if (versions) {
 		for (uint32_t i = 0; i < version_count; i++) {
 			//shader may be gone, so this may not be valid
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index e5e82552f4..5728444312 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -1075,10 +1075,7 @@ void RendererCanvasRenderRD::_render_items(RID p_to_render_target, int p_item_co
 			clear_colors.push_back(texture_storage->render_target_get_clear_request_color(p_to_render_target));
 			texture_storage->render_target_disable_clear_request(p_to_render_target);
 		}
-#ifndef _MSC_VER
-#warning TODO obtain from framebuffer format eventually when this is implemented
-#endif
-
+		// TODO: Obtain from framebuffer format eventually when this is implemented.
 		fb_uniform_set = texture_storage->render_target_get_framebuffer_uniform_set(p_to_render_target);
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
index dd3f62e509..3289bfb0ea 100644
--- a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
@@ -102,10 +102,8 @@ void RendererCompositorRD::begin_frame(double frame_step) {
 }
 
 void RendererCompositorRD::end_frame(bool p_swap_buffers) {
-#ifndef _MSC_VER
-#warning TODO: likely pass a bool to swap buffers to avoid display?
-#endif
-	RD::get_singleton()->swap_buffers(); //probably should pass some bool to avoid display?
+	// TODO: Likely pass a bool to swap buffers to avoid display?
+	RD::get_singleton()->swap_buffers();
 }
 
 void RendererCompositorRD::initialize() {
diff --git a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
index 78f4c410c3..240f743387 100644
--- a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
@@ -29,6 +29,7 @@
 /*************************************************************************/
 
 #include "particles_storage.h"
+
 #include "servers/rendering/renderer_rd/renderer_compositor_rd.h"
 #include "servers/rendering/rendering_server_globals.h"
 #include "texture_storage.h"
@@ -1334,10 +1335,7 @@ void ParticlesStorage::update_particles() {
 			}
 		}
 
-#ifndef _MSC_VER
-#warning Should use display refresh rate for all this
-#endif
-
+		// TODO: Should use display refresh rate for all this.
 		float screen_hz = 60;
 
 		int fixed_fps = 0;
diff --git a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
index b3a7e05ff5..add3e03389 100644
--- a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
@@ -29,6 +29,7 @@
 /*************************************************************************/
 
 #include "texture_storage.h"
+
 #include "../effects/copy_effects.h"
 #include "../framebuffer_cache_rd.h"
 #include "material_storage.h"
@@ -1496,9 +1497,7 @@ Ref<Image> TextureStorage::_validate_texture_format(const Ref<Image> &p_image, T
 		} break;
 		case Image::FORMAT_RGBE9995: {
 			r_format.format = RD::DATA_FORMAT_E5B9G9R9_UFLOAT_PACK32;
-#ifndef _MSC_VER
-#warning TODO need to make a function in Image to swap bits for this
-#endif
+			// TODO: Need to make a function in Image to swap bits for this.
 			r_format.swizzle_r = RD::TEXTURE_SWIZZLE_IDENTITY;
 			r_format.swizzle_g = RD::TEXTURE_SWIZZLE_IDENTITY;
 			r_format.swizzle_b = RD::TEXTURE_SWIZZLE_IDENTITY;