riscv64 linux kernel compilation issue

Question

I am trying to compile the linux kernel for riscv64 using the following link -

https://risc-v-getting-started-guide.readthedocs.io/en/latest/linux-qemu.html

While building linux with the command make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- defconfig the following error shows up - scripts/kconfig.include:35 compiler riscv64-unknown-linux-gnu-gcc not found in PATH scripts/kconfig/Makefile:82:recipe for target 'defconfig' failed

I have included path of tool chain. Still not working. Attached the screenshot of folder structure and error.

Have you tried using the package manager to install qemu? Full installations come with riscv-system-riscv32 and 64 variants. — Dylan McNamee

Frant Frant · Accepted Answer · 2020-08-15T03:17:52

I would suggest to provide the full prefix for your toolchain in the make command, for example:

wget https://toolchains.bootlin.com/downloads/releases/toolchains/riscv64/tarballs/riscv64--glibc--bleeding-edge-2020.02-2.tar.bz2
mkdir -p /opt/bootlin
tar jxf riscv64--glibc--bleeding-edge-2020.02-2.tar.bz2 -C /opt/bootlin

make ARCH=riscv CROSS_COMPILE=/opt/bootlin/riscv64--glibc--bleeding-edge-2020.02-2/bin/riscv64-buildroot-linux-gnu- mrproper defconfig Image

Compilation should complete without errors - using linux 5.7.11 here:

  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/confdata.o
  HOSTCC  scripts/kconfig/expr.o
  LEX     scripts/kconfig/lexer.lex.c
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/lexer.lex.o
  .../...
  LD      vmlinux.o
  MODPOST vmlinux.o
  MODINFO modules.builtin.modinfo
  GEN     modules.builtin
  LD      .tmp_vmlinux.kallsyms1
  KSYM    .tmp_vmlinux.kallsyms1.o
  LD      .tmp_vmlinux.kallsyms2
  KSYM    .tmp_vmlinux.kallsyms2.o
  LD      vmlinux
  SYSMAP  System.map
  OBJCOPY arch/riscv/boot/Image
  Kernel: arch/riscv/boot/Image is ready

riscv64 linux kernel compilation issue

1 Answers