cmake_command

git clone https://github.com/riscv-collab/riscv-gcc.git
cd riscv-gnu-toolchain

mkdir build 
cd build
../configure --prefix=/home/sole/opt/riscv/gcc --with-arch=rv64gcv
make linux

# down load llvm ZIP to get the newest LLVM  from github
cd llvm-project-main
mkdir build-host
CC=gcc CXX=g++ cmake ../llvm -DLLVM_ENABLE_PROJECTS='clang' -G Ninja -DCMAKE_BUILD_TYPE=Debug
ninja llvm-tblgen clang-tblgen

cd ..
mkdir build-riscv
cd build-riscv
cmake ../llvm -G Ninja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_HOST_TRIPLE=riscv64-unknown-linux-gnu \
    -DCMAKE_CROSSCOMPILING=True \
    -DCMAKE_SYSTEM_NAME=Linux \
    -DLLVM_DEFAULT_TARGET_TRIPLE=riscv64-unknown-linux-gnu \
    -DCMAKE_TOOLCHAIN_FILE=/home/sole/work/qemu_rvv/llvm-project-main/ToolchainExample.cmake \
    -DLLVM_TARGET_ARCH=riscv64 \
    -DLLVM_TARGETS_TO_BUILD=RISCV \
    -DLLVM_ENABLE_PROJECTS='clang;lld' \
    -DLLVM_OCAML_INSTALL_PATH=/home/sole/work/qemu_rvv/opt/llvm-0/ocaml-llvm \
    -DCMAKE_INSTALL_PREFIX=/home/sole/work/qemu_rvv/opt/llvm-0/llvm \
    -DLLVM_TABLEGEN=/home/sole/work/qemu_rvv/llvm-project-main/build-host/bin/llvm-tblgen \
    -DCLANG_TABLEGEN=/home/sole/work/qemu_rvv/llvm-project-main/build-host/bin/clang-tblgen \
    -DLLVM_BUILD_LLVM_DYLIB=On \
    -DLLVM_LINK_LLVM_DYLIB=On \
    -DLLVM_INSTALL_TOOLCHAIN_ONLY=On \
    -DHAVE_STEADY_CLOCK=0 \
    -DHAVE_PTHREAD_AFFINITY=0 \
    -DHAVE_POSIX_REGEX=0
ninja