ollama/docs/development.md

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# Development
Install required tools:
- go version 1.22 or higher
- gcc version 11.4.0 or higher
### MacOS
[Download Go](https://go.dev/dl/)
Optionally enable debugging and more verbose logging:
```bash
# At build time
export CGO_CFLAGS="-g"
# At runtime
export OLLAMA_DEBUG=1
```
Get the required libraries and build the native LLM code: (Adjust the job count based on your number of processors for a faster build)
```bash
make -j 5
```
Then build ollama:
```bash
go build .
```
Now you can run `ollama`:
```bash
./ollama
```
#### Xcode 15 warnings
If you are using Xcode newer than version 14, you may see a warning during `go build` about `ld: warning: ignoring duplicate libraries: '-lobjc'` due to Golang issue https://github.com/golang/go/issues/67799 which can be safely ignored. You can suppress the warning with `export CGO_LDFLAGS="-Wl,-no_warn_duplicate_libraries"`
### Linux
#### Linux CUDA (NVIDIA)
_Your operating system distribution may already have packages for NVIDIA CUDA. Distro packages are often preferable, but instructions are distro-specific. Please consult distro-specific docs for dependencies if available!_
Install `make`, `gcc` and `golang` as well as [NVIDIA CUDA](https://developer.nvidia.com/cuda-downloads)
development and runtime packages.
Typically the build scripts will auto-detect CUDA, however, if your Linux distro
or installation approach uses unusual paths, you can specify the location by
specifying an environment variable `CUDA_LIB_DIR` to the location of the shared
libraries, and `CUDACXX` to the location of the nvcc compiler. You can customize
a set of target CUDA architectures by setting `CMAKE_CUDA_ARCHITECTURES` (e.g. "50;60;70")
Then generate dependencies: (Adjust the job count based on your number of processors for a faster build)
```
make -j 5
```
Then build the binary:
```
go build .
```
#### Linux ROCm (AMD)
_Your operating system distribution may already have packages for AMD ROCm and CLBlast. Distro packages are often preferable, but instructions are distro-specific. Please consult distro-specific docs for dependencies if available!_
Install [CLBlast](https://github.com/CNugteren/CLBlast/blob/master/doc/installation.md) and [ROCm](https://rocm.docs.amd.com/en/latest/) development packages first, as well as `make`, `gcc`, and `golang`.
Typically the build scripts will auto-detect ROCm, however, if your Linux distro
or installation approach uses unusual paths, you can specify the location by
specifying an environment variable `ROCM_PATH` to the location of the ROCm
install (typically `/opt/rocm`), and `CLBlast_DIR` to the location of the
CLBlast install (typically `/usr/lib/cmake/CLBlast`). You can also customize
the AMD GPU targets by setting AMDGPU_TARGETS (e.g. `AMDGPU_TARGETS="gfx1101;gfx1102"`)
Then generate dependencies: (Adjust the job count based on your number of processors for a faster build)
```
make -j 5
```
Then build the binary:
```
go build .
```
ROCm requires elevated privileges to access the GPU at runtime. On most distros you can add your user account to the `render` group, or run as root.
#### Advanced CPU Settings
By default, running `make` will compile a few different variations
of the LLM library based on common CPU families and vector math capabilities,
including a lowest-common-denominator which should run on almost any 64 bit CPU
somewhat slowly. At runtime, Ollama will auto-detect the optimal variation to
load.
Custom CPU settings are not currently supported in the new Go server build but will be added back after we complete the transition.
#### Containerized Linux Build
If you have Docker available, you can build linux binaries with `OLLAMA_NEW_RUNNERS=1 ./scripts/build_linux.sh` which has the CUDA and ROCm dependencies included. The resulting binary is placed in `./dist`
### Windows
The following tools are required as a minimal development environment to build CPU inference support.
- Go version 1.22 or higher
- https://go.dev/dl/
- Git
- https://git-scm.com/download/win
- GCC and Make. There are multiple options on how to go about installing these tools on Windows. We have verified the following, but others may work as well:
- [MSYS2](https://www.msys2.org/)
- After installing, from an MSYS2 terminal, run `pacman -S mingw-w64-ucrt-x86_64-gcc make` to install the required tools
- Assuming you used the default install prefix for msys2 above, add `c:\msys64\ucrt64\bin` and `c:\msys64\usr\bin` to your environment variable `PATH` where you will perform the build steps below (e.g. system-wide, account-level, powershell, cmd, etc.)
Then, build the `ollama` binary:
```powershell
$env:CGO_ENABLED="1"
make -j 8
go build .
```
#### GPU Support
The GPU tools require the Microsoft native build tools. To build either CUDA or ROCm, you must first install MSVC via Visual Studio:
- Make sure to select `Desktop development with C++` as a Workload during the Visual Studio install
- You must complete the Visual Studio install and run it once **BEFORE** installing CUDA or ROCm for the tools to properly register
- Add the location of the **64 bit (x64)** compiler (`cl.exe`) to your `PATH`
- Note: the default Developer Shell may configure the 32 bit (x86) compiler which will lead to build failures. Ollama requires a 64 bit toolchain.
#### Windows CUDA (NVIDIA)
In addition to the common Windows development tools and MSVC described above:
- [NVIDIA CUDA](https://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/index.html)
#### Windows ROCm (AMD Radeon)
In addition to the common Windows development tools and MSVC described above:
- [AMD HIP](https://www.amd.com/en/developer/resources/rocm-hub/hip-sdk.html)
#### Windows arm64
The default `Developer PowerShell for VS 2022` may default to x86 which is not what you want. To ensure you get an arm64 development environment, start a plain PowerShell terminal and run:
```powershell
import-module 'C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\Common7\\Tools\\Microsoft.VisualStudio.DevShell.dll'
Enter-VsDevShell -Arch arm64 -vsinstallpath 'C:\\Program Files\\Microsoft Visual Studio\\2022\\Community' -skipautomaticlocation
```
You can confirm with `write-host $env:VSCMD_ARG_TGT_ARCH`
Follow the instructions at https://www.msys2.org/wiki/arm64/ to set up an arm64 msys2 environment. Ollama requires gcc and mingw32-make to compile, which is not currently available on Windows arm64, but a gcc compatibility adapter is available via `mingw-w64-clang-aarch64-gcc-compat`. At a minimum you will need to install the following:
```
pacman -S mingw-w64-clang-aarch64-clang mingw-w64-clang-aarch64-gcc-compat mingw-w64-clang-aarch64-make make
```
You will need to ensure your PATH includes go, cmake, gcc and clang mingw32-make to build ollama from source. (typically `C:\msys64\clangarm64\bin\`)