riscv32 toolchain is already included in the buildroot?

[w32zhong]

I have tried to set PATH to linux_for_riscv_em/output_mmu_rv32/buildroot/output/host/bin/, I built the Linux kernel and it runs successfully in your emulator.

I think buildroot has built the toolchain already, so there is no need to download your pre-built binaries from https://github.com/franzflasch/gcc-build-tools. Should we mention this in the README?

[franzflasch]

I remember that I did this for a reason, but I forgot for what reason exactly...

Did you test this with both RV32 and RV64? If it works with both, then please feel free to send a PR and I will merge it :)

[w32zhong]

@franzflasch I tested it with RV32 for mmu support and can only confirm that.

But it seems the specified cross compiler is riscv64-none-elf-* in your RV32 script:

linux_for_riscv_em/riscv_em_nommu_linux.sh

Line 47 in 1638984

make ARCH=riscv CROSS_COMPILE=riscv64-none-elf- -j16 loader

which is different from the riscv32-linux-gnu-* in the RV64 script. Not sure if this is critical to be different, if so, my guess it is incompatible to the cross compilers provided by buildroot?

I will need more time to try RV64. But if you need the RV32 script changes, I have it now.

[franzflasch]

Please send a PR if it also works for RV64. Thanks!