makefile

# Copyright 2019 Raef Coles

#===============================================================================
# You can touch this bit

EXE=swarm_control

SRC_DIR =./src
BIN_DIR =./bin
BLD_DIR =./build

SDL_CFLAGS  = $(shell sdl2-config --cflags)
SDL_LDFLAGS = $(shell sdl2-config --libs)

CFLAGS  = -c -O3 -g -fopenmp $(SDL_CFLAGS)
LDFLAGS = -lm -g -no-pie     $(SDL_LDFLAGS)

CC      = g++

#===============================================================================
# Here there be dragons

MK_DIR  =./.makefiles
DIRS    = $(BIN_DIR) $(BLD_DIR) $(MK_DIR)

VPATH = $(shell find $(SRC_DIR) -type d)
SRC   = $(notdir $(shell find $(SRC_DIR) -type f -name *.cpp -o -name *.c))
OBJ   = $(addprefix $(BLD_DIR)/, $(filter %.o, $(SRC:.cpp=.o) $(SRC:.c=.o)))
MKF   = $(addprefix $(MK_DIR)/, $(filter %.mk, $(SRC:.cpp=.mk) $(SRC:.c=.mk)))

.PHONY: clean

$(BIN_DIR)/$(EXE): $(OBJ) | $(MKF) $(BIN_DIR)
	$(CC) $(LDFLAGS) $^ -o $@

include $(MKF)

$(MK_DIR)/%.mk : %.cpp | $(MK_DIR) $(BLD_DIR)
	$(CC) -MT $(BLD_DIR)/$(*F).o -MM $(CFLAGS) $< -MF $@
	@echo "	$(CC) $(CFLAGS) $< -o $(BLD_DIR)/$(*F).o" >> $@

$(MK_DIR)/%.mk : %.c | $(MK_DIR) $(BLD_DIR)
	$(CC) -MT $(BLD_DIR)/$(*F).o -MM $(CFLAGS) $< -MF $@
	@echo "	$(CC) $(CFLAGS) $< -o $(BLD_DIR)/$(*F).o" >> $@

$(DIRS):
	mkdir -p $@

clean:
	rm -rf $(DIRS)