PREFIX:=riscv64-elf-
OPT ?= -Os
CFLAGS+=-I${TOPDIR}/common -I${TOPDIR}/apps/common
CFLAGS+=${OPT} -fno-stack-protector -fno-builtin-memcpy -fno-builtin
CFLAGS+=-static-libgcc -fdata-sections -ffunction-sections
CFLAGS+=-g -march=rv32im -mabi=ilp32 -static
LDFLAGS:= -T ${TOPDIR}/apps/common/linker.ld -nostdlib -Wl,--gc-sections
LIBS:= -lgcc # needed for softfp

# check if the compiler is installed
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Darwin)
    PREFIX=riscv64-elf-
    ifeq (,$(shell which ${PREFIX}gcc))
        $(error "Try brew install riscv64-elf-gcc riscv64-elf-binutils")
    endif
else
    PREFIX=riscv64-unknown-elf-
    ifeq (,$(shell which ${PREFIX}gcc))
        $(error "Try apt-get install gcc-riscv64-unknown-elf")
    endif
endif

all_common:
	${PREFIX}gcc -o ${PROJECT}.elf ${CFLAGS} ${LDFLAGS} ${SRCS} ${LIBS}
	@$(PREFIX)objcopy ${PROJECT}.elf -O binary ${PROJECT}.bin

disasm_common: all
	$(PREFIX)objdump -S -d -f ${PROJECT}.elf

test_common: all
	${TOPDIR}/hosts/host/host ${HOST_EXTRA} ${PWD}/${PROJECT}.bin

clean_common:
	rm -f ${PROJECT}.o ${PROJECT}.elf ${PROJECT}.bin