transfer RENA project deps+make to enby

deps/Makefile

@@ -0,0 +1,75 @@
+.DEFAULT_GOAL := all
+
+CXX := gcc -xc++ -lstdc++ -shared-libgcc
+
+BUILD := build
+DEPS := imgui
+SYNC := $(addsuffix -sync, $(DEPS))
+
+# imgui_impl_allegro5.o imgui_impl_android.o      imgui_impl_dx9.o         
+# imgui_impl_dx10.o     imgui_impl_dx11.o         imgui_impl_dx12.o        
+# imgui_impl_glfw.o     imgui_impl_glut.o         imgui_impl_opengl2.o     
+# imgui_impl_opengl3.o  imgui_impl_sdl2.o         imgui_impl_sdl3.o        
+# imgui_impl_sdlgpu3.o  imgui_impl_sdlrenderer2.o imgui_impl_sdlrenderer3.o
+# imgui_impl_vulkan.o   imgui_impl_wgpu.o         imgui_impl_win32.o 
+
+# === DEAR IMGUI = VALID BACKENDS ===
+# allegro5 glfw    sdlgpu3
+# android  glut    sdlrenderer2
+# dx9      opengl2 sdlrenderer3
+# dx10     opengl3 vulkan
+# dx11     sdl2    wgpu
+# dx12     sdl3    win32
+IMGUI_ENABLE_BACKENDS := sdl3 opengl3
+
+# Dear ImGui
+IMGUI_UPSTREAM := https://github.com/ocornut/imgui.git
+IMGUI_BRANCH := docking
+IMGUI_TAG := v1.92.3-docking
+
+IMGUI_BACKENDS := $(foreach backend, $(IMGUI_ENABLE_BACKENDS), imgui_impl_$(backend).o)
+
+IMGUI_OBJS := imgui.o imgui_demo.o                        \
+			  imgui_draw.o imgui_tables.o imgui_widgets.o \
+			  imgui_freetype.o imgui_stdlib.o \
+			  $(addprefix backends/, $(IMGUI_BACKENDS))
+
+STATICLIBS := $(foreach dep, $(DEPS), lib$(dep).a)
+
+# === BUILD TARGETS === 
+all: $(BUILD) $(STATICLIBS)
+$(BUILD):
+	mkdir -p $(addprefix $(BUILD)/, $(DEPS))
+
+libimgui.a: imgui $(addprefix $(BUILD)/imgui/, $(IMGUI_OBJS))
+	ar rcs $@ $(filter %.o, $^)
+
+$(BUILD)/imgui/imgui_stdlib.o: imgui/misc/cpp/imgui_stdlib.cpp
+	$(CXX) -c $^ -o $@ -Iimgui
+$(BUILD)/imgui/imgui_freetype.o: imgui/misc/freetype/imgui_freetype.cpp
+	$(CXX) -c $^ -o $@ -Iimgui
+$(BUILD)/imgui/backends/%.o: imgui/backends/%.cpp
+	mkdir -p $(dir $@)
+	$(CXX) -c $^ -o $@ -Iimgui
+$(BUILD)/imgui/%.o: imgui/%.cpp
+	$(CXX) -c $^ -o $@
+
+# === SYNC TARGETS ===
+.PHONY: sync $(SYNC)
+sync: $(SYNC)
+
+imgui:
+	mkdir -p $@
+	- git -C $@ init
+	- git -C $@ remote add upstream $(IMGUI_UPSTREAM)
+	$(MAKE) $@-sync
+imgui-sync: imgui
+	git -C $< fetch upstream --tags
+	git -C $< -c advice.detachedHead=false checkout $(IMGUI_TAG)
+
+# === UTILITY TARGETS === 
+.PHONY: clean purge
+clean:
+	rm -rf $(BUILD) $(STATICLIBS)
+purge: clean
+	rm -rf $(DEPS)