kumquat-buildroot/arch/arch.mk.riscv
Mark Corbin 9b3d52b400 arch: add support for RISC-V 64-bit (riscv64) architecture
This enables a riscv64 system to be built with a Buildroot generated
toolchain (gcc >= 7.x, binutils >= 2.30, glibc only).

This configuration has been used to successfully build a qemu-bootable
riscv-linux-4.15 kernel (https://github.com/riscv/riscv-linux.git).

Signed-off-by: Mark Corbin <mark.corbin@embecosm.com>
[Thomas:
 - simplify arch.mk.riscv by directly setting GCC_TARGET_ARCH
 - simplify glibc.mk changes by using GLIBC_CONF_ENV.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-09-23 23:42:41 +02:00

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#
# Configure the GCC_TARGET_ARCH variable and append the
# appropriate RISC-V ISA extensions.
#
ifeq ($(BR2_riscv),y)
ifeq ($(BR2_ARCH_IS_64),y)
GCC_TARGET_ARCH := rv64i
endif
ifeq ($(BR2_RISCV_ISA_RVM),y)
GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)m
endif
ifeq ($(BR2_RISCV_ISA_RVA),y)
GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)a
endif
ifeq ($(BR2_RISCV_ISA_RVF),y)
GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)f
endif
ifeq ($(BR2_RISCV_ISA_RVD),y)
GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)d
endif
ifeq ($(BR2_RISCV_ISA_RVC),y)
GCC_TARGET_ARCH := $(GCC_TARGET_ARCH)c
endif
endif