LDFLAGS = -L$(BIN) -lptk

EXAMPLE_DIR = examples

EXAMPLES = $(shell find $(EXAMPLE_DIR) -type f -name "*.c")

OBJ = $(EXAMPLES:.c=)
NAMES = $(OBJ:$(EXAMPLE_DIR)/%=%)

.PHONY: all

all:
ifdef EXAMPLE
	$(MAKE) -f $(EXAMPLE_DIR)/Makefile example-$(EXAMPLE)
else
	@echo "you need to pick a test: make example EXAMPLE=<example_name>"
	@echo -n "available examples:"
	@$(foreach example,$(NAMES),echo -n " $(example)";)
	@echo
endif

example-%: $(BIN)/$(EXAMPLE_DIR)/%
	$(BIN)/$(EXAMPLE_DIR)/$(EXAMPLE)

$(BIN)/%: %.c
	@mkdir -p $(@D)
	$(CC) $< $(LDFLAGS) $(CFLAGS) -o $@