TARGET_LIB := libsparklepaw.so
SRC_DIR := libsparklepaw
BUILD_DIR := build

PREFIX ?= /usr/local
LIBDIR ?= $(PREFIX)/lib
INCLUDEDIR ?= $(PREFIX)/include
MANDIR ?= $(PREFIX)/share/man

CFLAGS := -Wall -Wextra -flto -funsigned-char

### build mode

ifeq ($(mode),debug)
	CFLAGS += -g -Og
	BUILD_DIR := $(BUILD_DIR)/debug
else
	CFLAGS += -O3 -DNDEBUG
	LDFLAGS += -s
endif

### automatically populated variables

SRCS := $(shell find $(SRC_DIR) -name '*.c')
OBJS := $(SRCS:$(SRC_DIR)/%.c=$(BUILD_DIR)/%.o)
HEADERS := $(shell find $(SRC_DIR) -name '*.h')

TARGET := $(BUILD_DIR)/$(TARGET_LIB)

### build targets

all: $(TARGET)

$(TARGET): $(OBJS)
	$(CC) $(CFLAGS) -shared -o $@ $(LDFLAGS) $(OBJS)

$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
	@mkdir -p $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

### other targets

clean:
	$(RM) $(OBJS) $(TARGET)

install: $(TARGET) $(HEADERS)
	install -m 755 $(TARGET) $(LIBDIR)
	install -m 755 -d $(INCLUDEDIR)/libsparklepaw/
	install -m 644 $(HEADERS) $(INCLUDEDIR)/libsparklepaw/

uninstall:
	$(RM) $(LIBDIR)/$(TARGET_LIB)
	$(RM) -r $(INCLUDEDIR)/libsparklepaw/

doc:
	doxygen

clean-doc:
	$(RM) -r docs-generated/

### end

.PHONY: all clean install uninstall doc clean-doc