Documenting shortcomings in make.

# Makefile for cheako-vulkan

.SUFFIXES: .h.in .h      # Add .h.in and .h as suffixes

M4       = m4
M4FLAGS  =
M4SCRIPT =

%.h: %.h.in
	${M4} ${M4FLAGS} ${M4SCRIPT} $< > $*.h

%.so: %.c
	$(COMPILE.c) -shared $(OUTPUT_OPTION) $<

LDFLAGS = -Wl,-rpath,\$$ORIGIN -L.
LDLIBS = -lhand_data

# Include debug symbols and warn on all
CFLAGS = -g -Wall

# Our single executable
OBJS = libhand_data.so vulkan_test

all: $(OBJS)

vulkan_test: spv.h $(shell pkg-config --libs glfw3) -lvulkan

spv.h: vert.spv frag.spv

vert.spv: tri.vert
	glslangValidator -V $<

frag.spv: tri.frag
	glslangValidator -V $<

clean:
	rm -f $(OBJS) spv.h vert.spv frag.spv

# valgrind discovers bugs, google it.
test: clean all
	valgrind ./vulkan_test

.PHONY: all clean test

###########
# RESULTS #
###########
cheako@debian:~/src/github/cheako-vulkan$ make clean
rm -f libhand_data.so vulkan_test spv.h vert.spv frag.spv
cheako@debian:~/src/github/cheako-vulkan$ make
cc -g -Wall   -c -shared -o libhand_data.so libhand_data.c
glslangValidator -V tri.vert
tri.vert
glslangValidator -V tri.frag
tri.frag
m4   spv.h.in > spv.h
cc -g -Wall  -Wl,-rpath,\$ORIGIN -L.  vulkan_test.c spv.h /usr/lib/i386-linux-gnu/libglfw.so /usr/lib/i386-linux-gnu/libvulkan.so  -lhand_data -o vulkan_test
cheako@debian:~/src/github/cheako-vulkan$ ldd ./vulkan_test | grep hand
cheako@debian:~/src/github/cheako-vulkan$ nm ./vulkan_test | grep hand_
00007140 D hand_data_model
000071c0 D hand_data_model_count

############
# Expected #
############
hand_data_model should be undefined, "U".
libhand_data.so should be listed as an shared object dependency.