If it's the first time you check-out a repo you need to use --init first:

git submodule update --init --recursive  

For git 1.8.2 or above, the option --remote was added to support updating to latest tips of remote branches:

git submodule update --recursive --remote

Update specific submodules

git submodule update --init path/to/submodule

Replace path/to/submodule with the path to the specific submodule you want to update or initialize.

If you have nested submodules, you may need to use the --recursive flag to update all the submodules recursively. For example:

git submodule update --init --recursive path/to/submodule

These commands ensure that only the specified submodule is updated or initialized, without affecting other submodules in your Git repository.

Configure

git submodule update --init --recursive
make toolchain-cmake

How to build && install

Build & install llvm tool-chain

• make toolchain-cmake
• make toolchain-llvm-main
• make toolchain-protoc
• make toolchain-onnx-mlir

make toolchain-onnx-mlir fails

cd toolchain/onnx-mlir/build

• make -j8
• make install -j8

make toolchain-llvm-main fails

cd toolchain/riscv-llvm/build

• make -j8
• make install -j8

If only changes were made to llvm and running the command make -j8 fails, run the initial command make toolchain-llvm-main

Python environment

wget https://repo.anaconda.com/miniconda/Miniconda3-py310_24.3.0-0-Linux-x86_64.sh
bash Miniconda3-py310_24.3.0-0-Linux-x86_64.sh 

create a Conda environment

source ~/miniconda3/etc/profile.d/conda.sh
conda create --name onnx-mlir --file packages.txt