Automated, pre-built LLVM, Clang, MLIR, CIRCT, and libuv libraries distributed via GitHub Releases.

This repository builds pre-compiled libraries from official sources using GitHub Actions.

1. LLVM Release (e.g., llvm-18.1.8-<platform>)

   • Linux & macOS: A unified libLLVM.so / libLLVM.dylib shared library containing all LLVM components.
   • Windows: Static LLVM libraries built with clang-cl (MSVC ABI does not support LLVM_BUILD_LLVM_DYLIB).
   • Includes Clang, LLD (linker), and Polly (polyhedral optimizer).
   • All LLVM/Clang/LLD/Polly headers and CMake config files.

2. MLIR Release (e.g., mlir-18.1.8-<platform>)

   • The standalone MLIR C API shared library (MLIR-C.dll / libMLIR-C.so / libMLIR-C.dylib).
   • MLIR C headers and CMake config files.

3. CIRCT Release (e.g., circt-1.140.0-<platform>)

   • CIRCT (Circuit IR Compilers and Tools) built as a unified LLVM+MLIR+CIRCT package.
   • Linux & macOS: Shared LLVM dylib with host-architecture targets.
   • Windows: Static libraries built with clang-cl (same MSVC ABI limitation as LLVM).
   • Versioned independently from LLVM using CIRCT's firtool-X.Y.Z release tags.

4. libuv Release (e.g., libuv-1.52.0-<platform>)

   • libuv shared library (uv.dll / libuv.so / libuv.dylib) on all three platforms.
   • Unlike LLVM, Windows produces a proper DLL — no static fallback needed.
   • Includes both the shared library (uv) and the static library (uv_a), plus all headers and CMake config files.

Compiled for all LLVM target architectures (x86, AArch64, WebAssembly, ARM, RISC-V, etc.):

Compiled for host architecture only (CIRCT does hardware IR transforms, not software codegen):

Shared library on all platforms — MSVC ABI supports libuv DLLs natively:

Releases are triggered automatically when tags are pushed:

• LLVM + MLIR: Push llvm-v18.1.8 → both workflows run, attach output to the same Release.
• CIRCT: Push circt-v1.140.0 → CIRCT workflow runs with its own Release page.
• libuv: Push libuv-v1.52.0 → libuv workflow runs with its own Release page.

All workflows also support workflow_dispatch for manual builds with a version input.

Download the archive for your OS from the Releases page and extract it. It contains a standard install tree (bin/, lib/, include/):

cmake -DLLVM_DIR=/path/to/extracted/lib/cmake/llvm ..
cmake -DMLIR_DIR=/path/to/extracted/lib/cmake/mlir ..

find_package(LLVM REQUIRED CONFIG)
find_package(MLIR REQUIRED CONFIG)

For libuv:

cmake -Dlibuv_DIR=/path/to/extracted/lib/cmake/libuv ..

find_package(libuv REQUIRED CONFIG)
target_link_libraries(my_target PRIVATE libuv::libuv)

cmake -G Ninja -S llvm-project/llvm -B build \
  -DCMAKE_BUILD_TYPE=Release \
  -DLLVM_ENABLE_PROJECTS="clang;lld;polly" \
  -DLLVM_BUILD_LLVM_DYLIB=ON \
  -DLLVM_LINK_LLVM_DYLIB=ON \
  -DLLVM_TARGETS_TO_BUILD="all" \
  -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF \
  -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_DOCS=OFF

cmake -G Ninja -S llvm-project/llvm -B build ^
  -DCMAKE_C_COMPILER=clang-cl -DCMAKE_CXX_COMPILER=clang-cl ^
  -DLLVM_USE_LINKER=lld -DCMAKE_BUILD_TYPE=Release ^
  -DLLVM_ENABLE_PROJECTS="clang;lld;polly" ^
  -DLLVM_TARGETS_TO_BUILD="all" ^
  -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF ^
  -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_DOCS=OFF

Same as LLVM but with -DLLVM_ENABLE_PROJECTS="mlir" -DMLIR_BUILD_MLIR_C_DYLIB=ON. Add LLVM_BUILD_LLVM_DYLIB=ON and LLVM_LINK_LLVM_DYLIB=ON on Linux/macOS only.

cmake -G Ninja -S circt/llvm/llvm -B build \
  -DCMAKE_BUILD_TYPE=Release \
  -DLLVM_ENABLE_PROJECTS="mlir" \
  -DLLVM_EXTERNAL_PROJECTS=circt \
  -DLLVM_EXTERNAL_CIRCT_SOURCE_DIR=/path/to/circt \
  -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON \
  -DLLVM_TARGETS_TO_BUILD="host" \
  -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF \
  -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_DOCS=OFF

cmake -G Ninja -S circt/llvm/llvm -B build ^
  -DCMAKE_C_COMPILER=clang-cl -DCMAKE_CXX_COMPILER=clang-cl ^
  -DLLVM_USE_LINKER=lld -DCMAKE_BUILD_TYPE=Release ^
  -DLLVM_ENABLE_PROJECTS="mlir" ^
  -DLLVM_EXTERNAL_PROJECTS=circt ^
  -DLLVM_EXTERNAL_CIRCT_SOURCE_DIR=C:\path\to\circt ^
  -DLLVM_TARGETS_TO_BUILD="host" ^
  -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF ^
  -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_DOCS=OFF

cmake -G Ninja -S libuv -B build \
  -DCMAKE_BUILD_TYPE=Release \
  -DLIBUV_BUILD_SHARED=ON \
  -DBUILD_TESTING=OFF

Windows: same command with ^ line continuations. MSVC produces uv.dll + uv.lib without any special flags.

The LLVM, MLIR, and CIRCT libraries are distributed under the Apache License v2.0 with LLVM Exceptions. libuv is distributed under the MIT License.