How to build iree for riscv ？

[FlintWangacc]

https://iree.dev/building-from-source/riscv/#install-prebuilt-risc-v-tools-risc-v-64-bit-linux-toolchain

I found that ./build_tools/cmake/linux_riscv64.cmake is deleted.
How to build iree for riscv now ?

[hanhanW]

@HanKuanChen can you answer and help update the doc? I think the files were touched by you recently. Thanks!

[HanKuanChen]

It is still here https://github.com/iree-org/iree/blob/main/build_tools/cmake/linux_riscv64.cmake.
You can use https://github.com/iree-org/iree/blob/main/build_tools/cmake/build_riscv.sh to help you build risc-v environment. For example, IREE_READ_REMOTE_CCACHE=0 IREE_HOST_BIN_DIR="/path/to/iree-build/install/bin" RISCV_TOOLCHAIN_ROOT="/path/to/riscv/toolchain/clang/linux/RISCV" build_tools/cmake/build_riscv.sh
You can get the latest toolchain here https://github.com/riscv-collab/riscv-gnu-toolchain/releases.