This package provides a Julia language wrapper for libclang: the stable, C-exported interface to the LLVM Clang compiler. The libclang API documentation provides background on the functionality available through libclang, and thus through the Julia wrapper. The repository also hosts related tools built on top of libclang functionality.

pkg> add Clang

If you'd like to use the old generator(Clang.jl v0.13), please checkout this branch for the documentation. Should you have any questions on how to upgrade the generator script, feel free to submit a post/request in the Discussions area.

Clang.jl provides a module Clang.Generators for auto-generating C library bindings for Julia language from C headers.

Write a config file generator.toml:

[general]
library_name = "libclang"
output_file_path = "./LibClang.jl"
module_name = "LibClang"
jll_pkg_name = "Clang_jll"
export_symbol_prefixes = ["CX", "clang_"]

and a Julia script generator.jl:

using Clang.Generators
using Clang.LibClang.Clang_jll  # replace this with your jll package

cd(@__DIR__)

include_dir = normpath(Clang_jll.artifact_dir, "include")
clang_dir = joinpath(include_dir, "clang-c")

options = load_options(joinpath(@__DIR__, "generator.toml"))

# add compiler flags, e.g. "-DXXXXXXXXX"
args = get_default_args()  # Note you must call this function firstly and then append your own flags
push!(args, "-I$include_dir")

headers = [joinpath(clang_dir, header) for header in readdir(clang_dir) if endswith(header, ".h")]
# there is also an experimental `detect_headers` function for auto-detecting top-level headers in the directory
# headers = detect_headers(clang_dir, args)

# create context
ctx = create_context(headers, args, options)

# run generator
build!(ctx)

Please refer to this toml file for a full list of configuration options.

The binding generator is currently used by many projects in the Julia package ecosystem and you can take them as good examples.

• JuliaInterop/Clang.jl: the low-level wrapper LibClang.jl is generated by this package itself
• JuliaSparse/SparseArrays.jl: generate platform-specific bindings for SuiteSparse
• maleadt/LLVM.jl: generate platform-specific bindings for LLVM (multiple versions)
• JuliaGPU/VulkanCore.jl: generate platform-specific bindings for Vulkan with optional third-party JLL dependencies
• JuliaGPU/oneAPI.jl: generate bindings for oneAPI and format the generated code with JuliaFormatter.jl
• JuliaGeo/GDAL.jl: generate bindings for GDAL with customized docstrings extracted from doxygen
• JuliaGeo/LibGEOS.jl: generate bindings for LibGEOS with customized rewriter
• JuliaMultimedia/CSFML.jl: generate bindings for CSFML with multiple library names
• SciML/Sundials.jl: generate bindings for Sundials with highly customized rewriter

Other Users:

• CEED/libCEED: libCEED's Julia binding
• JuliaGPU/CUDA.jl: CUDA programming in Julia
• scipopt/SCIP.jl: Julia interface to the SCIP solver
• JuliaParallel/MPI.jl: MPI interface for the Julia language
• JuliaGPU/Metal.jl: Metal programming in Julia
• JuliaIO/VideoIO.jl: Reading and writing of video files in Julia
• JuliaGPU/AMDGPU.jl: AMD GPU (ROCm) programming in Julia
• JuliaGeo/Proj.jl: Julia wrapper around the PROJ cartographic projections library
• JuliaIO/PNGFiles.jl: Julia wrapper around libpng
• JuliaSparse/KLU.jl: Julia wrapper around the SuiteSparse solver KLU
• JuliaGraphics/FreeType.jl: FreeType bindings for Julia