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rocm-systems/docs/markdown/hip_build.md
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ROCm CI Service Account 9a175e1654 SWDEV-324824 - Split HIP install to two documents (#2546)
Change-Id: Idb3b40167cd9c8dd8fde254e00f7891af04811a8

Co-authored-by: Julia Jiang <julia.jiang@amd.com>
2022-03-11 16:59:44 +05:30

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## Table of Contents
<!-- toc -->
- [Prerequisites](#Prerequisites)
- [Build HIP on AMD platform](#build-hip-on-amd-platform)
* [Get HIP source code](#get-hip-source-code)
* [Set the environment variables](#set-the-environment-variables)
* [Build HIP](#build-hip)
* [Default paths and environment variables](#default-paths-and-environment-variables)
- [Build HIP on NVIDIA platform](#build-hip-on-NVIDIA-platform)
* [Get HIP source code](#get-hip-source-code)
* [Set the environment variables](#set-the-environment-variables)
* [Build HIP](#build-hip)
- [Run HIP](#run-hip)
<!-- tocstop -->
# Prerequisites
HIP code can be developed either on AMD ROCm platform using HIP-Clang compiler, or a CUDA platform with nvcc installed.
Before build and run HIP, make sure drivers and pre-build packages are installed properly on the platform.
## AMD platform
Install ROCm packages (see ROCm Installation Guide on AMD public documentation site (https://docs.amd.com/)) or install pre-built binary packages using the package manager,
```
sudo apt install mesa-common-dev
sudo apt install clang
sudo apt install comgr
sudo apt-get -y install rocm-dkms
```
## NVIDIA platform
Install Nvidia driver and pre-build packages (see HIP Installation Guide at https://docs.amd.com/ for the release)
## Branch of repository
Before get HIP source code, set the expected branch of repository at the variable HIP_BRANCH.
For example, for ROCm5.0 release branch, set
```
export HIP_BRANCH=rocm-5.0.x
```
ROCm5.1 release branch, set
```
export HIP_BRANCH=rocm-5.1.x
```
Similiar format for future branches.
ROCM_PATH is path where ROCM is installed. BY default ROCM_PATH is at /opt/rocm.
# Build HIP on AMD platform
## Get HIP source code
```
git clone -b $HIP_BRANCH https://github.com/ROCm-Developer-Tools/hipamd.git
git clone -b $HIP_BRANCH https://github.com/ROCm-Developer-Tools/hip.git
git clone -b $HIP_BRANCH https://github.com/ROCm-Developer-Tools/ROCclr.git
git clone -b $HIP_BRANCH https://github.com/RadeonOpenCompute/ROCm-OpenCL-Runtime.git
```
## Set the environment variables
```
export HIPAMD_DIR="$(readlink -f hipamd)"
export HIP_DIR="$(readlink -f hip)"
export ROCclr_DIR="$(readlink -f ROCclr)"
export OPENCL_DIR="$(readlink -f ROCm-OpenCL-Runtime)"
```
ROCclr is defined on AMD platform that HIP use Radeon Open Compute Common Language Runtime (ROCclr), which is a virtual device interface that HIP runtimes interact with different backends.
See https://github.com/ROCm-Developer-Tools/ROCclr
HIPAMD repository provides implementation specifically for AMD platform.
See https://github.com/ROCm-Developer-Tools/hipamd
## Build HIP
```
cd "$HIPAMD_DIR"
mkdir -p build; cd build
cmake -DHIP_COMMON_DIR=$HIP_DIR -DAMD_OPENCL_PATH=$OPENCL_DIR -DROCCLR_PATH=$ROCCLR_DIR -DCMAKE_PREFIX_PATH="<ROCM_PATH>/" -DCMAKE_INSTALL_PREFIX=$PWD/install ..
make -j$(nproc)
sudo make install
```
Note: If you don't specify CMAKE_INSTALL_PREFIX, hip runtime will be installed to "<ROCM_PATH>/hip".
By default, release version of AMDHIP is built.
## Default paths and environment variables
* By default HIP looks for HSA in <ROCM_PATH>/hsa (can be overridden by setting HSA_PATH environment variable).
* By default HIP is installed into <ROCM_PATH>/hip (can be overridden by setting HIP_PATH environment variable).
* By default HIP looks for clang in <ROCM_PATH>/llvm/bin (can be overridden by setting HIP_CLANG_PATH environment variable)
* By default HIP looks for device library in <ROCM_PATH>/lib (can be overridden by setting DEVICE_LIB_PATH environment variable).
* Optionally, consider adding <ROCM_PATH>/bin to your PATH to make it easier to use the tools.
* Optionally, set HIPCC_VERBOSE=7 to output the command line for compilation.
After make install command, make sure HIP_PATH is pointed to $PWD/install/hip.
# Build HIP on NVIDIA platform
## Get HIP source code
```
git clone -b $HIP_BRANCH https://github.com/ROCm-Developer-Tools/hip.git
git clone -b $HIP_BRANCH https://github.com/ROCm-Developer-Tools/hipamd.git
```
## Set the environment variables
```
export HIP_DIR="$(readlink -f hip)"
export HIPAMD_DIR="$(readlink -f hipamd)"
```
## Build HIP
```
cd "$HIPAMD_DIR"
mkdir -p build; cd build
cmake -DHIP_COMMON_DIR=$HIP_DIR -DHIP_PLATFORM=nvidia -DCMAKE_INSTALL_PREFIX=$PWD/install ..
make -j$(nproc)
sudo make install
```
# Run HIP
Compile and run the [square sample](https://github.com/ROCm-Developer-Tools/HIP/tree/rocm-5.0.x/samples/0_Intro/square).