Sync ollama docs from c146a138 on 2025-12-07
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# Development
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Install prerequisites:
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- [Go](https://go.dev/doc/install)
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- C/C++ Compiler e.g. Clang on macOS, [TDM-GCC](https://github.com/jmeubank/tdm-gcc/releases/latest) (Windows amd64) or [llvm-mingw](https://github.com/mstorsjo/llvm-mingw) (Windows arm64), GCC/Clang on Linux.
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Then build and run Ollama from the root directory of the repository:
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```shell
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go run . serve
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```
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> [!NOTE]
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> Ollama includes native code compiled with CGO. From time to time these data structures can change and CGO can get out of sync resulting in unexpected crashes. You can force a full build of the native code by running `go clean -cache` first.
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## macOS (Apple Silicon)
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macOS Apple Silicon supports Metal which is built-in to the Ollama binary. No additional steps are required.
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## macOS (Intel)
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Install prerequisites:
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- [CMake](https://cmake.org/download/) or `brew install cmake`
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Then, configure and build the project:
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```shell
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cmake -B build
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cmake --build build
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```
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Lastly, run Ollama:
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```shell
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go run . serve
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```
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## Windows
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Install prerequisites:
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- [CMake](https://cmake.org/download/)
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- [Visual Studio 2022](https://visualstudio.microsoft.com/downloads/) including the Native Desktop Workload
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- (Optional) AMD GPU support
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- [ROCm](https://rocm.docs.amd.com/en/latest/)
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- [Ninja](https://github.com/ninja-build/ninja/releases)
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- (Optional) NVIDIA GPU support
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- [CUDA SDK](https://developer.nvidia.com/cuda-downloads?target_os=Windows&target_arch=x86_64&target_version=11&target_type=exe_network)
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- (Optional) VULKAN GPU support
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- [VULKAN SDK](https://vulkan.lunarg.com/sdk/home) - useful for AMD/Intel GPUs
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Then, configure and build the project:
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```shell
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cmake -B build
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cmake --build build --config Release
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```
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> Building for Vulkan requires VULKAN_SDK environment variable:
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>
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> PowerShell
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> ```powershell
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> $env:VULKAN_SDK="C:\VulkanSDK\<version>"
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> ```
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> CMD
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> ```cmd
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> set VULKAN_SDK=C:\VulkanSDK\<version>
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> ```
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> [!IMPORTANT]
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> Building for ROCm requires additional flags:
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> ```
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> cmake -B build -G Ninja -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
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> cmake --build build --config Release
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> ```
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Lastly, run Ollama:
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```shell
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go run . serve
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```
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## Windows (ARM)
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Windows ARM does not support additional acceleration libraries at this time. Do not use cmake, simply `go run` or `go build`.
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## Linux
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Install prerequisites:
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- [CMake](https://cmake.org/download/) or `sudo apt install cmake` or `sudo dnf install cmake`
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- (Optional) AMD GPU support
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- [ROCm](https://rocm.docs.amd.com/projects/install-on-linux/en/latest/install/quick-start.html)
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- (Optional) NVIDIA GPU support
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- [CUDA SDK](https://developer.nvidia.com/cuda-downloads)
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- (Optional) VULKAN GPU support
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- [VULKAN SDK](https://vulkan.lunarg.com/sdk/home) - useful for AMD/Intel GPUs
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- Or install via package manager: `sudo apt install vulkan-sdk` (Ubuntu/Debian) or `sudo dnf install vulkan-sdk` (Fedora/CentOS)
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> [!IMPORTANT]
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> Ensure prerequisites are in `PATH` before running CMake.
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Then, configure and build the project:
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```shell
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cmake -B build
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cmake --build build
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```
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Lastly, run Ollama:
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```shell
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go run . serve
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```
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## Docker
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```shell
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docker build .
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```
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### ROCm
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```shell
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docker build --build-arg FLAVOR=rocm .
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```
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## Running tests
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To run tests, use `go test`:
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```shell
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go test ./...
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```
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> NOTE: In rare circumstances, you may need to change a package using the new
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> "synctest" package in go1.24.
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>
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> If you do not have the "synctest" package enabled, you will not see build or
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> test failures resulting from your change(s), if any, locally, but CI will
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> break.
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>
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> If you see failures in CI, you can either keep pushing changes to see if the
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> CI build passes, or you can enable the "synctest" package locally to see the
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> failures before pushing.
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>
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> To enable the "synctest" package for testing, run the following command:
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>
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> ```shell
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> GOEXPERIMENT=synctest go test ./...
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> ```
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>
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> If you wish to enable synctest for all go commands, you can set the
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> `GOEXPERIMENT` environment variable in your shell profile or by using:
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>
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> ```shell
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> go env -w GOEXPERIMENT=synctest
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> ```
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>
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> Which will enable the "synctest" package for all go commands without needing
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> to set it for all shell sessions.
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>
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> The synctest package is not required for production builds.
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## Library detection
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Ollama looks for acceleration libraries in the following paths relative to the `ollama` executable:
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* `./lib/ollama` (Windows)
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* `../lib/ollama` (Linux)
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* `.` (macOS)
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* `build/lib/ollama` (for development)
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If the libraries are not found, Ollama will not run with any acceleration libraries.
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