CC := gcc

ifdef PROD
CFLAGS := -std=c99 -Wpedantic -O3 -s # production flags
else
CFLAGS := -std=c99 -Wall -Wextra -Wpedantic -Wshadow -Wpointer-arith \
          -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -g3 -DDEBUG

ifdef MEMDEBUG
CFLAGS += -DENABLE_MEMDEBUG
endif
endif

NAME := nlisp

SRC := src
OBJ := obj
BIN := bin
TEST := tests

# rebuild when flags change
FLAGHASH := $(strip $(shell echo $(CFLAGS) | sha256sum | cut -d " " -f1 ))

SRCS = $(wildcard $(SRC)/*.c)
OBJS = $(SRCS:$(SRC)/%.c=$(OBJ)/%-$(FLAGHASH).o)

DEPS = $(OBJS:%.o=%.d)
-include $(DEPS)

.PHONY: all clean $(NAME) analyze valgrind cppcheck
.DEFAULT_GOAL := all

all: $(NAME)
$(NAME): $(BIN)/$(NAME)

clean:
	rm -rf $(BIN)
	rm -rf $(OBJ)

$(OBJ) $(BIN):
	mkdir -p $@

$(OBJ)/%-$(FLAGHASH).o: $(SRC)/%.c | $(OBJ)
	$(CC) $(CFLAGS) -MMD -MF $(@:%.o=%.d) -c $< -o $@

$(BIN)/%: $(OBJS) | $(BIN)
	$(CC) $(CFLAGS) $^ -o $@

analyze: clean
	scan-build \
		-enable-checker alpha \
		-enable-checker core \
		-enable-checker deadcode \
		-enable-checker security \
		-enable-checker unix \
		make

valgrind: $(NAME)
	valgrind -s --leak-check=full --show-leak-kinds=all $(BIN)/$(NAME)

cppcheck: clean
	cppcheck --enable=all $(SRCS) --check-level=exhaustive 2> cppcheck.log