25 lines
699 B
Makefile
25 lines
699 B
Makefile
# Use clang / llvm toolchain
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#
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CC = clang
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CXX = clang++
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LD = ld.lld
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SIZE = llvm-size
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DUMP = riscv64-unknown-elf-objdump
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COPY = riscv64-unknown-elf-objcopy
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OBJS += startup.o system.o
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CCPU = -march=rv32imac -mabi=ilp32
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MCPU = $(CCPU)
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TRIP = riscv32-unknown-none-elf
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CFLAGS+= -Oz
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CFLAGS+= -flto
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CFLAGS+= -fmessage-length=0 -fsigned-char -I/usr/include/newlib
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#CFLAGS+= -fconstexpr-steps=2097152
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CFLAGS+= --target=$(TRIP) $(MCPU)
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LFLAGS+= --Map=$(@:%.elf=%.map) --gc-sections
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# 16-bit instrukce se do toho asi dostanou až na úrovni LLVM linkeru.
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# Bohužel to není nikde pořádně popsáno.
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LFLAGS+= -mllvm -mattr=+c
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LFLAGS+= -lto-O3
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LFLAGS+= -nostdlib
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LDLIBS+= -L./$(TARGET) -T script.ld
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