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ollama/CMakeLists.txt
Daniel Hiltgen 9c925a2d29 ci: fix windows MLX build
2026-05-06 19:20:48 -07:00

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CMake
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cmake_minimum_required(VERSION 3.21)
project(Ollama C CXX)
# Handle cross-compilation on macOS: when CMAKE_OSX_ARCHITECTURES is set to a
# single architecture different from the host, override CMAKE_SYSTEM_PROCESSOR
# to match. This is necessary because CMAKE_SYSTEM_PROCESSOR defaults to the
# host architecture, but downstream projects (like MLX) use it to detect the
# target architecture.
if(CMAKE_OSX_ARCHITECTURES AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";")
# Single architecture specified
if(CMAKE_OSX_ARCHITECTURES STREQUAL "x86_64" AND NOT CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
message(STATUS "Cross-compiling for x86_64: overriding CMAKE_SYSTEM_PROCESSOR from ${CMAKE_SYSTEM_PROCESSOR} to x86_64")
set(CMAKE_SYSTEM_PROCESSOR "x86_64")
elseif(CMAKE_OSX_ARCHITECTURES STREQUAL "arm64" AND NOT CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64")
message(STATUS "Cross-compiling for arm64: overriding CMAKE_SYSTEM_PROCESSOR from ${CMAKE_SYSTEM_PROCESSOR} to arm64")
set(CMAKE_SYSTEM_PROCESSOR "arm64")
endif()
endif()
include(CheckLanguage)
include(GNUInstallDirs)
find_package(Threads REQUIRED)
set(CMAKE_BUILD_TYPE Release)
# These defaults can be overridden by presets (e.g., for static macOS llama-server builds)
if(NOT DEFINED BUILD_SHARED_LIBS)
set(BUILD_SHARED_LIBS ON)
endif()
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS ON) # Recent versions of MLX Requires gnu++17 extensions to compile properly
# GGML backend for inference is provided by llama-server (built separately via
# llama/server/CMakeLists.txt using FetchContent from upstream llama.cpp).
# This root CMakeLists.txt only builds MLX (when enabled).
if(APPLE)
set(CMAKE_BUILD_RPATH "@loader_path")
set(CMAKE_INSTALL_RPATH "@loader_path")
set(CMAKE_BUILD_WITH_INSTALL_RPATH ON)
endif()
set(OLLAMA_BUILD_DIR ${CMAKE_BINARY_DIR}/lib/ollama)
set(OLLAMA_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib/ollama/${OLLAMA_RUNNER_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${OLLAMA_BUILD_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${OLLAMA_BUILD_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${OLLAMA_BUILD_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${OLLAMA_BUILD_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_DEBUG ${OLLAMA_BUILD_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE ${OLLAMA_BUILD_DIR})
option(MLX_ENGINE "Enable MLX backend" OFF)
if(MLX_ENGINE)
if(MLX_CUDA_ARCHITECTURES OR CMAKE_CUDA_ARCHITECTURES)
check_language(CUDA)
endif()
message(STATUS "Setting up MLX (this takes a while...)")
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/x/imagegen/mlx)
# Find CUDA toolkit if MLX is built with CUDA support
find_package(CUDAToolkit)
# Build list of directories for runtime dependency resolution
set(MLX_RUNTIME_DIRS ${CUDAToolkit_BIN_DIR} ${CUDAToolkit_BIN_DIR}/x64 ${CUDAToolkit_LIBRARY_DIR})
# Add cuDNN bin paths for DLLs (Windows MLX CUDA builds)
# CUDNN_ROOT_DIR is the standard CMake variable for cuDNN location
if(DEFINED ENV{CUDNN_ROOT_DIR})
# cuDNN 9.x has versioned subdirectories under bin/ (e.g., bin/13.0/)
file(GLOB CUDNN_BIN_SUBDIRS "$ENV{CUDNN_ROOT_DIR}/bin/*")
list(APPEND MLX_RUNTIME_DIRS ${CUDNN_BIN_SUBDIRS})
endif()
# Add build output directory and MLX dependency build directories
list(APPEND MLX_RUNTIME_DIRS ${OLLAMA_BUILD_DIR})
# OpenBLAS DLL location (pre-built zip extracts into openblas-src/bin/)
list(APPEND MLX_RUNTIME_DIRS ${CMAKE_BINARY_DIR}/_deps/openblas-src/bin)
# NCCL: on Linux, if real NCCL is found, cmake bundles libnccl.so via the
# regex below. If NCCL is not found, MLX links a static stub (OBJECT lib)
# so there is no runtime dependency. This path covers the stub build dir
# for windows so we include the DLL in our dependencies.
list(APPEND MLX_RUNTIME_DIRS ${CMAKE_BINARY_DIR}/_deps/mlx-build/mlx/distributed/nccl/nccl_stub-prefix/src/nccl_stub-build/Release)
# Base regexes for runtime dependencies (cross-platform)
set(MLX_INCLUDE_REGEXES cublas cublasLt cudart cufft nvrtc nvrtc-builtins cudnn nccl openblas gfortran)
# On Windows, also include dl.dll (dlfcn-win32 POSIX emulation layer)
if(WIN32)
list(APPEND MLX_INCLUDE_REGEXES "^dl\\.dll$")
endif()
install(TARGETS mlx mlxc
RUNTIME_DEPENDENCIES
DIRECTORIES ${MLX_RUNTIME_DIRS}
PRE_INCLUDE_REGEXES ${MLX_INCLUDE_REGEXES}
PRE_EXCLUDE_REGEXES ".*"
RUNTIME DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
LIBRARY DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
FRAMEWORK DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
)
if(TARGET jaccl)
install(TARGETS jaccl
RUNTIME DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
LIBRARY DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
FRAMEWORK DESTINATION ${OLLAMA_INSTALL_DIR} COMPONENT MLX
)
endif()
# Install the Metal library for macOS arm64 (must be colocated with the binary)
# Metal backend is only built for arm64, not x86_64
if(APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64")
install(FILES ${CMAKE_BINARY_DIR}/_deps/mlx-build/mlx/backend/metal/kernels/mlx.metallib
DESTINATION ${OLLAMA_INSTALL_DIR}
COMPONENT MLX)
endif()
# Install headers for NVRTC JIT compilation at runtime.
# MLX's own install rules use the default component so they get skipped by
# --component MLX. Headers are installed alongside libmlx in OLLAMA_INSTALL_DIR.
#
# Layout:
# ${OLLAMA_INSTALL_DIR}/include/cccl/{cuda,nv}/ — CCCL headers
# ${OLLAMA_INSTALL_DIR}/include/*.h — CUDA toolkit headers
#
# MLX's jit_module.cpp resolves CCCL via
# current_binary_dir()[.parent_path()] / "include" / "cccl"
# On Linux, MLX's jit_module.cpp resolves CCCL via
# current_binary_dir().parent_path() / "include" / "cccl", so we create a
# symlink from lib/ollama/include -> ${OLLAMA_RUNNER_DIR}/include
# This will need refinement if we add multiple CUDA versions for MLX in the future.
# CUDA runtime headers are found via CUDA_PATH env var (set by mlxrunner).
if(EXISTS ${CMAKE_BINARY_DIR}/_deps/cccl-src/include/cuda)
install(DIRECTORY ${CMAKE_BINARY_DIR}/_deps/cccl-src/include/cuda
DESTINATION ${OLLAMA_INSTALL_DIR}/include/cccl
COMPONENT MLX)
install(DIRECTORY ${CMAKE_BINARY_DIR}/_deps/cccl-src/include/nv
DESTINATION ${OLLAMA_INSTALL_DIR}/include/cccl
COMPONENT MLX)
endif()
# Install minimal CUDA toolkit headers needed by MLX JIT kernels.
# These are the transitive closure of includes from mlx/backend/cuda/device/*.cuh.
# The Go mlxrunner sets CUDA_PATH to OLLAMA_INSTALL_DIR so MLX finds them at
# $CUDA_PATH/include/*.h via NVRTC --include-path.
if(CUDAToolkit_FOUND)
# CUDAToolkit_INCLUDE_DIRS may be a semicolon-separated list
# (e.g. ".../include;.../include/cccl"). Find the entry that
# contains the CUDA runtime headers we need.
set(_cuda_inc "")
foreach(_dir ${CUDAToolkit_INCLUDE_DIRS})
if(EXISTS "${_dir}/cuda_runtime_api.h")
set(_cuda_inc "${_dir}")
break()
endif()
endforeach()
if(NOT _cuda_inc)
message(WARNING "Could not find cuda_runtime_api.h in CUDAToolkit_INCLUDE_DIRS: ${CUDAToolkit_INCLUDE_DIRS}")
else()
set(_dst "${OLLAMA_INSTALL_DIR}/include")
set(_MLX_JIT_CUDA_HEADERS
builtin_types.h
cooperative_groups.h
cuda_bf16.h
cuda_bf16.hpp
cuda_device_runtime_api.h
cuda_fp16.h
cuda_fp16.hpp
cuda_fp8.h
cuda_fp8.hpp
cuda_runtime_api.h
device_types.h
driver_types.h
math_constants.h
surface_types.h
texture_types.h
vector_functions.h
vector_functions.hpp
vector_types.h
)
foreach(_hdr ${_MLX_JIT_CUDA_HEADERS})
install(FILES "${_cuda_inc}/${_hdr}"
DESTINATION ${_dst}
COMPONENT MLX)
endforeach()
# Subdirectory headers
install(DIRECTORY "${_cuda_inc}/cooperative_groups"
DESTINATION ${_dst}
COMPONENT MLX
FILES_MATCHING PATTERN "*.h")
install(FILES "${_cuda_inc}/crt/host_defines.h"
DESTINATION "${_dst}/crt"
COMPONENT MLX)
if(NOT WIN32 AND NOT APPLE)
install(CODE "
set(_link \"${CMAKE_INSTALL_PREFIX}/lib/ollama/include\")
set(_target \"${OLLAMA_RUNNER_DIR}/include\")
if(NOT EXISTS \${_link})
execute_process(COMMAND \${CMAKE_COMMAND} -E create_symlink \${_target} \${_link})
endif()
" COMPONENT MLX)
endif()
endif()
endif()
# On Windows, explicitly install dl.dll (dlfcn-win32 POSIX dlopen emulation)
# RUNTIME_DEPENDENCIES auto-excludes it via POST_EXCLUDE_FILES_STRICT because
# dlfcn-win32 is a known CMake target with its own install rules (which install
# to the wrong destination). We must install it explicitly here.
if(WIN32)
install(FILES ${OLLAMA_BUILD_DIR}/dl.dll
DESTINATION ${OLLAMA_INSTALL_DIR}
COMPONENT MLX)
endif()
# Manually install CUDA runtime libraries that MLX loads via dlopen
# (not detected by RUNTIME_DEPENDENCIES since they aren't link-time deps)
if(CUDAToolkit_FOUND)
file(GLOB MLX_CUDA_LIBS
"${CUDAToolkit_LIBRARY_DIR}/libcudart.so*"
"${CUDAToolkit_LIBRARY_DIR}/libcublas.so*"
"${CUDAToolkit_LIBRARY_DIR}/libcublasLt.so*"
"${CUDAToolkit_LIBRARY_DIR}/libnvrtc.so*"
"${CUDAToolkit_LIBRARY_DIR}/libnvrtc-builtins.so*"
"${CUDAToolkit_LIBRARY_DIR}/libcufft.so*"
"${CUDAToolkit_LIBRARY_DIR}/libcudnn.so*")
if(MLX_CUDA_LIBS)
install(FILES ${MLX_CUDA_LIBS}
DESTINATION ${OLLAMA_INSTALL_DIR}
COMPONENT MLX)
endif()
endif()
endif()
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