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https://github.com/brain-hackers/u-boot-brain
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0c074845e5
Use the new Kconfig entries to construct the ISA string for the -march compiler flag. The -mabi compiler flag is selected based on the base integer instruction set. With this change, the C (compressed instructions) ISA extension is now enabled for all boards with CONFIG_RISCV_ISA_C set. Buildman reports a decrease in binary size of 71590 bytes. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
31 lines
638 B
Makefile
31 lines
638 B
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# Copyright (C) 2017 Andes Technology Corporation.
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# Rick Chen, Andes Technology Corporation <rick@andestech.com>
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ifeq ($(CONFIG_ARCH_RV64I),y)
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ARCH_BASE = rv64im
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ABI = lp64
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endif
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ifeq ($(CONFIG_ARCH_RV32I),y)
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ARCH_BASE = rv32im
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ABI = ilp32
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endif
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ifeq ($(CONFIG_RISCV_ISA_A),y)
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ARCH_A = a
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endif
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ifeq ($(CONFIG_RISCV_ISA_C),y)
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ARCH_C = c
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endif
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ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI)
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PLATFORM_CPPFLAGS += $(ARCH_FLAGS)
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CFLAGS_EFI += $(ARCH_FLAGS)
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head-y := arch/riscv/cpu/start.o
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libs-y += arch/riscv/cpu/
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libs-y += arch/riscv/cpu/$(CPU)/
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libs-y += arch/riscv/lib/
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