Makefile and INSTALL doc changes

INSTALL.linux-static

@@ -0,0 +1,33 @@
+Compile on older container to get binary that runs on older OS too (SDL doesn't compile on older than 20.04):
+docker run -v .:/SDLRousku -it --rm ubuntu:20.04
+  On Linux, install the packages listed at
+  https://github.com/libsdl-org/SDL/blob/main/docs/README-linux.md#build-dependencies
+
+in addition apt install xdd nasm libwayland-dev
+
+mkdir vendored
+cd vendored
+git clone https://github.com/libsdl-org/SDL.git
+cd SDL
+cmake -S . -B build -DBUILD_SHARED_LIBS=OFF
+cmake --build build
+
+git clone https://github.com/libsdl-org/SDL_image.git
+cd SDL_image/external
+./download.sh
+cd ..
+cmake -S . -B build -DBUILD_SHARED_LIBS=OFF -DSDLIMAGE_VENDORED=ON -DCMAKE_PREFIX_PATH=../SDL/build
+cmake --build build
+
+git clone https://github.com/libsdl-org/SDL_ttf.git
+cd SDL_ttf/external/
+./download.sh
+cd ..
+cmake -S . -B build -DBUILD_SHARED_LIBS=OFF -DSDLTTF_VENDORED=ON  -DCMAKE_PREFIX_PATH=../SDL/build
+cmake --build build
+
+
+
+AppImage:
+make install DESTDIR=AppDir
+appimage-builder

INSTALL.mingw32-linux

@@ -120,3 +120,6 @@ package() {
   done
 }
 ------------------------------------
+
+x86_64-w64-mingw32-make -f Makefile.mingw
+x86_64-w64-mingw32-strip Rousku.exe

Makefile

@@ -8,7 +8,7 @@ NEW_DIALOG_OBJECTS = Dialog Item Button Checkbox DropDownList Scrollbar Listbox
 OBJECTS=main Animal Sound $(addprefix NewDialogs/,$(NEW_DIALOG_OBJECTS))
 EXECUTABLE=Rousku
 
-all: $(EXECUTABLE)
+all: embed_data.h menu_png.h $(EXECUTABLE)
 	
 $(EXECUTABLE): $(OBJECTS:%=%.o)
 	$(CXX) $^ $(LDFLAGS) -o $@
@@ -20,6 +20,25 @@ $(EXECUTABLE): $(OBJECTS:%=%.o)
 	$(CXX) $(CXXFLAGS) $< -o $@
 	$(CXX) -MM $(CXXFLAGS) $*.cpp > $*.d
 
+embed_data.h:
+	@echo "Generating embed_data.h..."
+	@{ \
+		find skin -name "*.png"; \
+		find skin -name "*.wav"; \
+		find skin -name "*.tsk"; \
+	} | while read n; do \
+		xxd -i "$$n"; \
+	done > embed_data.h
+
+menu_png.h:
+	xxd -i menu.png > menu_png.h
+
 .PHONY: clean
 clean:
-	rm `find . -name "*.o"` `find . -name "*.d"` $(EXECUTABLE)
+	rm `find . -name "*.o"` `find . -name "*.d"`  embed_data.h menu_png.h $(EXECUTABLE)
+
+install:
+	mkdir -p $(DESTDIR)/usr/bin/
+	cp $(EXECUTABLE) $(DESTDIR)/usr/bin/$(EXECUTABLE)
+	mkdir -p $(DESTDIR)/usr/share/icons/
+	cp skin/Tavallinen/paikka/1.png $(DESTDIR)/usr/share/icons/rousku.png

Makefile.linux-static

@@ -0,0 +1,45 @@
+CXX=g++
+
+# needs "override" because x86_64-w64-mingw32-make sets these as cmdline parameters
+override CXXFLAGS += -c -Wall -Ivendored/SDL/include -Ivendored/SDL_image/include -Ivendored/SDL_ttf/include
+#override LDFLAGS += $(shell pkg-config --libs sdl3 sdl3-ttf sdl3-image)
+override LDFLAGS += -Wl,-Bstatic vendored/SDL/build/libSDL3.a vendored/SDL_image/build/libSDL3_image.a vendored/SDL_ttf/build/libSDL3_ttf.a -Wl,-Bdynamic -lpthread -ldl -static-libgcc -static-libstdc++
+
+NEW_DIALOG_OBJECTS = Dialog Item Button Checkbox DropDownList Scrollbar Listbox Frame DlgDropDownList DlgMainMenu
+OBJECTS=main Animal Sound $(addprefix NewDialogs/,$(NEW_DIALOG_OBJECTS))
+EXECUTABLE=Rousku
+
+all: embed_data.h menu_png.h $(EXECUTABLE)
+	
+$(EXECUTABLE): $(OBJECTS:%=%.o)
+	$(CXX) $^ $(LDFLAGS) -o $@
+
+# pull in dependency info for *existing* .o files
+-include $(OBJECTS:%=%.d)
+
+%.o: %.cpp
+	$(CXX) $(CXXFLAGS) $< -o $@
+	$(CXX) -MM $(CXXFLAGS) $*.cpp > $*.d
+
+embed_data.h:
+	@echo "Generating embed_data.h..."
+	@{ \
+		find skin -name "*.png"; \
+		find skin -name "*.wav"; \
+		find skin -name "*.tsk"; \
+	} | while read n; do \
+		xxd -i "$$n"; \
+	done > embed_data.h
+
+menu_png.h:
+	xxd -i menu.png > menu_png.h
+
+.PHONY: clean
+clean:
+	rm `find . -name "*.o"` `find . -name "*.d"`  embed_data.h menu_png.h $(EXECUTABLE)
+
+install:
+	mkdir -p $(DESTDIR)/usr/bin/
+	cp $(EXECUTABLE) $(DESTDIR)/usr/bin/$(EXECUTABLE)
+	mkdir -p $(DESTDIR)/usr/share/icons/
+	cp skin/Tavallinen/paikka/1.png $(DESTDIR)/usr/share/icons/rousku.png