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CC = $(TARGET)-gcc
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LD = $(TARGET)-ld
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AS = $(TARGET)-gcc
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OBJCOPY = $(TARGET)-objcopy
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KERN_WARNINGS = -Wall -Wextra -Wpedantic -Wuninitialized -Wunused-result
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KERN_FLAGS = -ffreestanding -nostartfiles -nostdlib -nodefaultlibs --std=gnu2x
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MACHINE_FLAGS = -march=rv64gc -mabi=lp64 -mcmodel=medany
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PATH_FLAGS = -I./
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CFLAGS = ${MACHINE_FLAGS} -g -O0 ${KERN_WARNINGS} ${KERN_FLAGS} ${PATH_FLAGS}
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LDFLAGS = -m elf64lriscv --gc-sections -nostdlib -T rv64-sifive_u.ld
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ASFLAGS = ${CFLAGS}
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.SUFFIXES: .c .o .S
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.c.o:
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${CC} ${CFLAGS} -o $@ -c $<
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.S.o:
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${AS} ${ASFLAGS} -o $@ -c $<
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.PHONY: all test clean
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all: kernel.elf kernel.sym
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kernel.elf: kernel.o crt0.o platform/FU740/uart.o platform/FU740/clock.o
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${LD} ${LDFLAGS} -o kernel.elf kernel.o crt0.o platform/FU740/uart.o platform/FU740/clock.o
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kernel.sym: kernel.elf
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${OBJCOPY} --only-keep-debug kernel.elf kernel.sym
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kernel.o: kernel.c
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platform/FU740/uart.o: platform/FU740/uart.c
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platform/FU740/clock.o: platform/FU740/clock.c
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crt0.o: crt0.S
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test:
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clean:
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rm -f kernel.elf kernel.o crt0.o platform/FU740/uart.o platform/FU740/clock.o
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