# Compiler and other things.
CC = gcc
CFLAGS = -std=c99 -Wall -Wextra
BUILDD = build

# NOTE: there is a gcc bug (?) which is making some of the code produce spurrious warnings
# for "stringop-overflow" even though no string operations are taking place
# ifeq ($(CC),gcc)
# 	CFLAGS += -Wno-error=stringop-overflow
# endif
ifdef MARCH 		# Allows you to define the architecture (usually not required)
	CFLAGS += -march=$(MARCH)
endif
ifndef FORCE 		# Force the build to move past warnings (disable warnings as errors)
	CFLAGS += -Werror
endif
ifdef DEBUG 		# Build in debug mode, usable in gdb/valgrind/etc
	CFLAGS += -O2 -g
else
	CFLAGS += -O3 -flto
endif

HALOOLIB = haloo3d/build/haloo3d_full.a

.PHONY: clean
.PHONY: full

full:
	echo "Please specify a sample to build (ends with .exe)"

$(HALOOLIB):
	cd haloo3d && $(MAKE) full

# Rule to build .o files in main folder
$(BUILDD)/%.o: %.c %.h
	mkdir -p $(BUILDD)
	$(CC) $(CFLAGS) -c $< -o $@

# Rule to build any sample. We ALWAYS need math so... link it
%.exe: %.o $(HALOOLIB)
	$(CC) $(CFLAGS) $< $(HALOOLIB) -o $@ -lm -lSDL

# Rule to clean the build files
clean:
	rm -rf $(BUILDD)
	find . -name "*.exe" -type f -delete
	cd haloo3d && $(MAKE) clean