name it MakefileSimple, put it in VKDF_HOME/demos/sponza

Makefile

src = $(wildcard *.cpp)
obj = $(src:.cpp=.o)
dep = $(obj.o=.d)
bin = sponza

vkdf_root = ../..

spv = $(patsubst %.input,%.spv,$(wildcard *.input)) \
	$(patsubst %.frag,%.frag.spv,$(wildcard *.frag)) \
	$(patsubst %.vert,%.vert.spv,$(wildcard *.vert))

dbg = -g
opt = -O0
inc = -I$(vkdf_root)/framework
def = -DVKDF_PLATFORM_SDL

CXX = g++
CXXFLAGS = -Wall $(dbg) $(opt) $(inc) $(def) `pkg-config --cflags glm glib-2.0 sdl2`
LDFLAGS = -L$(vkdf_root) -lvkdf -lvulkan -lassimp -lSDL2_image \
		  `pkg-config --libs glm glib-2.0 sdl2`

GLSLANG = glslangValidator
FIXUP_GLSL := python $(vkdf_root)/scripts/fixup-glsl.py

$(bin): $(obj) $(vkdf_root)/libvkdf.so $(spv)
	$(CXX) -o $@ $(obj) -Wl,-rpath=$(vkdf_root) $(LDFLAGS)

%.frag: %.frag.input
	$(FIXUP_GLSL) $< $@

%.vert: %.vert.input
	$(FIXUP_GLSL) $< $@

%.vert.spv: %.vert
	$(GLSLANG) -V $< -o $@

%.frag.spv: %.frag
	$(GLSLANG) -V $< -o $@

-include $(dep)

%.d: %.cpp
	@echo "Generating depfile: $@"
	@$(CPP) $(CXXFLAGS) $< -MM -MT $(@:.d=.o) >$@

.PHONY: clean
clean:
	rm -f $(obj) $(bin) $(dep) *.spv

you either run make -f MakefileSimple sponza in VKDF_HOME or cd to demos/sponza and run make -f MakefileSimple (make sure vkdf is up to date and you have a VKDF_HOME/libvkdf.so)