Install HIP (ROCm) compiler on CUDA system.

Try this process.

1. First, add the ROCm repository to your system. For Ubuntu, you can use these commands:

wget -q -O - https://repo.radeon.com/rocm/rocm.gpg.key | sudo apt-key add -

echo 'deb [arch=amd64] https://repo.radeon.com/rocm/apt/debian/ ubuntu main' | sudo tee /etc/apt/sources.list.d/rocm.list

2. Update your package list:

sudo apt update

3. Install the HIP runtime and compiler for CUDA:

sudo apt install hip-runtime-nvidia hip-dev

4. Set up environment variables. Add these lines to your `~/.bashrc` file:

export HIP_PLATFORM=nvidia

export PATH=$PATH:/opt/rocm/bin

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/rocm/lib

Then run `source ~/.bashrc` to apply the changes.

5. Verify the installation:

hipconfig --full

6. Now try compiling your code again:

hipcc vector_add.cpp -o vector_add