OpenMP Mobile

This library provides means to compile and distribute OpenMP library for iOS.

OpenMP is part of LLVM distribution.

Version

Latest supported version of OpenMP is 16.0.5.

Supported platforms

• iOS
• iOS Simulator
• tvOS
• tvOS Simulator
• watchOS
• watchOS Simulator
• macOS

Requirements

• Xcode (including multiple platforms)
• LLVM with Clang
• Homebrew
• g++
• CMake
• node
• python
• perl
• ruby (for Cocoapods)
• carthage
• swift

Why

Libraries such as BLAS, or FAISS depend on OpenMP to run parallel execution across different platforms, this repository is a structured way to get the OpenMP source code compiled and distributed to iOS developers.

Getting started

Run ./openmp.sh and it will create dist/openmp.xcframework that you can use in your Xcode project.

openmp.xcframework

Once the compilation is done, you'll have XCframework created with the files below:

dist/openmp.xcframework
├── Info.plist
├── ios-arm64_arm64e
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
├── ios-arm64_arm64e_x86_64-simulator
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
├── macos-arm64_arm64e_x86_64
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
├── tvos-arm64
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
├── tvos-x86_64-simulator
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
├── watchos-arm64_32_armv7k
│   ├── Headers
│   │   ├── omp-tools.h
│   │   ├── omp.h
│   │   └── ompt.h
│   └── libomp.a
└── watchos-i386-simulator
    ├── Headers
    │   ├── omp-tools.h
    │   ├── omp.h
    │   └── ompt.h
    └── libomp.a

Takeaways

If you're looking to run parallel code on iOS using Objective-C or Swift, make sure to check examples for the details on how to integrate the library.

If you're not looking to run complex calculations (linear algebra, DSP, neural networks), then you might want to consider Apple's Grand Central Dispatch, as it is more optimized to provide a better user experience (battery management and performance).

Distribution

This package is available using following package managers.

Swift Package Manager

./Pacakage.swift points to remote release hosted on this GitHub repository. Use these instructions to add this GitHub repository.

Cocoapods

./OpenMP.podspec includes all the specific details about the build.

In your Podfile you can add this library using this syntax:

pod 'OpenMP', :git => 'https://github.com/eugenehp/openmp-mobile.git', :tag => 'v16.0.5'

Carthage

In Cartfile add following:

binary "https://raw.githubusercontent.com/eugenehp/openmp-mobile/master/carthage/openmp-static-xcframework.json" ~> 16.0.5

Releases

Release management works using gh.

brew install gh tree

To release a draft:

./openmp.sh release

Contributing

Contributions are welcome, feel free to submit an issue or open a pull request.

License

MIT

Copyright © 2023 Eugene Hauptmann

Trademarks

The OpenMP name and the OpenMP logo are registered trademarks of the OpenMP Architecture Review Board