ifeq ($(ANDROID_NDK_ROOT),)
$(error Error : Set the env variable 'ANDROID_NDK_ROOT' with the path of the Android NDK (version 20))
endif

CC := $(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android27-clang
AR := $(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android-ar
OBJCOPY := $(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android-objcopy
LD := $(ANDROID_NDK_ROOT)/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld.bfd

#==================Target Samsung S7 (8890)==================
CFLAGS_SAMSUNGS7 = -Os # -Os for optimization for size

dwc3:
	$(CC) entry.S -c -o entry.o $(CFLAGS_SAMSUNGS7) # -c compiles assembly code, and -o creates an object file (containing linking and symbol information)
	$(CC) $(CFLAGS_SAMSUNGS7) -c test_dwc3.c -o dwc3.o # compiles test_dwc3.c to dwc3.o
	$(LD) -T test_dwc3.ld entry.o dwc3.o -o dwc3.elf --just-symbols=symbols.txt # -T for linker script, --just-symbols for symbols file
	$(OBJCOPY) -O binary dwc3.elf dwc3.bin