Updated Makefile with pkg-config and a test target.

Makefile now gets the necessary `cflags` and `libs` compiler arguments
from `pkg-config` which increases portability and makes adding new
dependencies easier. Also added `TEST` flag, to have automated testing
in the future.

Makefile

@@ -1,13 +1,34 @@
 SHELL=/bin/bash
 
+# configurable options
+
+SOURCES_DIR := ./src
+TESTS_DIR := ./tests
+BUILD_DIR := ./build
+
 CC := gcc
 CXX := g++
 
-CFLAGS := -I/usr/include/fuse -D_FILE_OFFSET_BITS=64
-LDFLAGS := -lfuse3 -pthread
 
-ifdef DEBUG
-	CFLAGS += -O0 -pedantic -Wall -Wextra -Wcast-align \
+# dependencies
+
+PACKAGE_NAMES := fuse3
+
+ifeq ($(TEST), 1)
+	#	PACKAGE_NAMES += check # TODO: use check?
+endif
+
+
+# set up cflags and libs
+
+CFLAGS := -D_FILE_OFFSET_BITS=64
+LDFLAGS :=
+
+CFLAGS += $(shell pkg-config --cflags $(PACKAGE_NAMES))
+LDFLAGS += $(shell pkg-config --libs $(PACKAGE_NAMES))
+
+ifeq ($(DEBUG),1)
+	CFLAGS += -O0 -pedantic -g -Wall -Wextra -Wcast-align \
 						-Wcast-qual -Wdisabled-optimization -Wformat=2 \
 						-Winit-self -Wlogical-op -Wmissing-declarations \
 						-Wmissing-include-dirs -Wredundant-decls -Wshadow \
@@ -19,12 +40,32 @@ else
 	LDFLAGS +=
 endif
 
-SOURCES_DIR := ./src
-BUILD_DIR := ./build
 
-build: $(BUILD_DIR)/main.o $(BUILD_DIR)/fuse_operations.o $(BUILD_DIR)/sourcefs.o $(BUILD_DIR)/ui-socket.o
+# set up targets 
+
+TARGETS := icfs
+
+ifeq ($(TEST), 1)
+	TARGETS += icfs_test
+endif
+
+
+# build!
+
+default: $(TARGETS)
+
+.PHONY: clean
+
+icfs: $(BUILD_DIR)/main.o $(BUILD_DIR)/fuse_operations.o $(BUILD_DIR)/sourcefs.o $(BUILD_DIR)/ui-socket.o
 	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $(BUILD_DIR)/icfs
 
+icfs_test: $(BUILD_DIR)/main.o $(BUILD_DIR)/fuse_operations.o $(BUILD_DIR)/sourcefs.o $(BUILD_DIR)/ui-socket.o
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $(BUILD_DIR)/icfs_test
+	# $(BUILD_DIR)/icfs_test # TODO: implement testing
+
+$(BUILD_DIR)/test_access_control.o: $(TESTS_DIR)/test_access_control.c
+	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@
+
 $(BUILD_DIR)/main.o: $(SOURCES_DIR)/main.c
 	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $(BUILD_DIR)/main.o
 
@@ -38,4 +79,4 @@ $(BUILD_DIR)/ui-socket.o: $(SOURCES_DIR)/ui-socket.c $(SOURCES_DIR)/ui-socket.h
 	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@
 
 clean:
-	rm $(BUILD_DIR)/*
+	rm $(BUILD_DIR)/*.o $(BUILD_DIR)/icfs*