How statically link libfdt library with an existing Makefile?

I'm trying to build a bare metal hypervisor for raspberry pi 4 and I have cros-compile the proejct. I need to statically link libfdt library.

I have an existing Makefile for my project(Makefile):

ARMGNU ?= aarch64-linux-gnuCOPS = -Wall -nostdlib -nostartfiles -ffreestanding -Iinclude ASMOPS = -Iinclude BUILD_DIR = buildSRC_DIR = srcall : kernel8.imgclean :    rm -rf $(BUILD_DIR) *.img $(BUILD_DIR)/%_c.o: $(SRC_DIR)/%.c    mkdir -p $(@D)    $(ARMGNU)-gcc $(COPS) -MMD -c $< -o $@$(BUILD_DIR)/%_s.o: $(SRC_DIR)/%.S    $(ARMGNU)-gcc $(ASMOPS) -MMD -c $< -o $@C_FILES = $(wildcard $(SRC_DIR)/*.c)ASM_FILES = $(wildcard $(SRC_DIR)/*.S)OBJ_FILES = $(C_FILES:$(SRC_DIR)/%.c=$(BUILD_DIR)/%_c.o)OBJ_FILES += $(ASM_FILES:$(SRC_DIR)/%.S=$(BUILD_DIR)/%_s.o)DEP_FILES = $(OBJ_FILES:%.o=%.d)-include $(DEP_FILES)kernel8.img: $(SRC_DIR)/linker.ld $(OBJ_FILES)    $(ARMGNU)-ld -T $(SRC_DIR)/linker.ld -o $(BUILD_DIR)/kernel8.elf  $(OBJ_FILES)    $(ARMGNU)-objcopy $(BUILD_DIR)/kernel8.elf -O binary el2-kernel.img

Here's libfdt's Makefile (Makefile.libfdt):

# Makefile.libfdt## This is not a complete Makefile of itself.  Instead, it is designed to# be easily embeddable into other systems of Makefiles.#LIBFDT_soname = libfdt.$(SHAREDLIB_EXT).1LIBFDT_INCLUDES = fdt.h libfdt.h libfdt_env.hLIBFDT_VERSION = version.ldsLIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \    fdt_addresses.c fdt_overlay.c acpi.cLIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)

How will I be able to statically link libfdt to my project?