# Inputs

SRC_DIRS := src
INC_DIRS := inc
LIBS     := glew glfw3 freetype2 sdbus-c++


# Outputs

OUT_NAME  := timer_overlay
BUILD_DIR := build
OFILE_DIR := $(BUILD_DIR)/objects
PREFIX    ?= /usr/bin


# Project sources

LIB_INCLUDES := $(foreach lib, $(LIBS), $(shell pkg-config --cflags-only-I $(lib)))
INCLUDES     := $(addprefix -I, $(INC_DIRS)) $(LIB_INCLUDES)
C_SOURCES    := $(foreach dir, $(SRC_DIRS), $(wildcard $(dir)/*.c))
CXX_SOURCES  := $(foreach dir, $(SRC_DIRS), $(wildcard $(dir)/*.cpp))


# Intermediary Outputs

OFILES := $(addprefix $(OFILE_DIR)/, $(notdir $(C_SOURCES:.c=.o) $(CXX_SOURCES:.cpp=.o)))


# Compiler flags

OPT      := -O2
CPPFLAGS := $(INCLUDES) -MMD
CFLAGS   := $(OPT) -Wall -Wextra -Wpedantic
CXXFLAGS := -std=c++17 $(OPT) -Wall -Wextra -Wpedantic


# Linker flags

LDFLAGS := $(foreach lib, $(LIBS), $(shell pkg-config --libs-only-L $(lib)))
LDLIBS  := $(foreach lib, $(LIBS), $(shell pkg-config --libs-only-l $(lib)))


# Dependency files generated by the compiler

DEPENDS := $(OFILES:.o=.d)


# All output directories

ALL_DIRS := $(BUILD_DIR) $(OFILE_DIR)


# Use CC as linker if there are no CXX source files

ifeq ($(strip $(CXX_SOURCES)),)
	LD := $(CC)
else
	LD := $(CXX)
endif



.PHONY: all run clean install

all: $(BUILD_DIR)/$(OUT_NAME)

run: $(BUILD_DIR)/$(OUT_NAME)
	$(BUILD_DIR)/$(OUT_NAME)

clean:
	$(RM) -r $(ALL_DIRS)

install: $(BUILD_DIR)/$(OUT_NAME)
	install -D $(BUILD_DIR)/$(OUT_NAME) $(PREFIX)


# Include generated header file dependencies

-include $(DEPENDS)


$(BUILD_DIR)/$(OUT_NAME): $(OFILES) | $(COMPILED_SHADERS) $(TEXTURES) $(MODELS) $(BUILD_DIR)
	$(LD) $^ $(LDFLAGS) $(LDLIBS) -o $@

$(OFILE_DIR)/%.o: %.c | $(OFILE_DIR)
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

$(OFILE_DIR)/%.o: %.cpp | $(OFILE_DIR)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@


# Directories

$(ALL_DIRS):
	mkdir -p $@


vpath %.c $(SRC_DIRS)
vpath %.cpp $(SRC_DIRS)