Build llama.cpp on Ubuntu 24.04

build-llama-cpp.sh

#!/bin/sh
# Build llama.cpp on Ubuntu 24.04 with AMD GPU support

sudo apt -y install git wget hipcc libhipblas-dev librocblas-dev cmake build-essential

# ensure you have the necessary permissions by adding yourself to the video and render groups
sudo usermod -aG video,render $USER
# reboot to apply the group changes

# run rocminfo to check everything is working thus far
rocminfo
# if it printed information about your GPU, that means it's working
# if you see an error message, fix the problem before continuing

# download a model
wget --continue https://huggingface.co/TheBloke/dolphin-2.2.1-mistral-7B-GGUF/resolve/main/dolphin-2.2.1-mistral-7b.Q5_K_M.gguf?download=true -O dolphin-2.2.1-mistral-7b.Q5_K_M.gguf

# build llama.cpp
git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
git checkout b3267
HIPCXX=clang++-17 cmake -H. -Bbuild -DGGML_HIPBLAS=ON -DCMAKE_BUILD_TYPE=Release
make -j16 -C build

# run llama.cpp
build/bin/llama-cli -ngl 32 --color -c 2048 --temp 0.7 --repeat_penalty 1.1 -n -1 -m ../dolphin-2.2.1-mistral-7b.Q5_K_M.gguf --prompt "Once upon a time"

@MarioIshac, the official guide is out of date. The -DAMDGPU_TARGETS flag only affects the hip::device target provided by find_package(hip). This is the mechanism you would use to choose the target if you were building with CXX=hipcc. However, llama-cpp switched to using CMake's built-in support for the HIP language, with HIPCXX=clang++ and enable_language(hip). The target selection for that mechanism would be controlled by -DCMAKE_HIP_ARCHITECTURES flag.

In the case that the AMDGPU_TARGETS is not specified, hipcc will detect your GPU and build for that target. In the case that CMAKE_HIP_ARCHITECTURES is not specified, cmake will detect your GPU and build for that target. As such, in the official guide you linked, the build uses HIPCXX and CMAKE_HIP_ARCHITECTURES is unset, so it will autodetect the architecture. Since hipcc is not used, the fact that it sets AMDGPU_TARGETS is irrelevant.

For end users, it's better for them to not specify the GPU architecture anyway. It's better to just let it autodetect, as then I don't need to train users on how to determine their GPU architecture for specifying it manually. Only power-users that are building binaries to distribute to other people really need to learn that.