Portable C++ Toolchain

The Portable C++ Toolchain is a complete C/C++ toolchain based on LLVM.

With this toolchain you can:

• Target a wide variety of operating systems with the same compiler
• Create binaries compatible with nearly every Linux distribution
• Cross-compile to Linux from any OS with no extra configuration
• Use CMake or Bazel with minimal setup

Supported targets

• Linux
  • x86_64-unknown-linux-gnu
  • x86_64-unknown-linux-musl
  • aarch64-unknown-linux-gnu
  • aarch64-unknown-linux-musl
  • armv7-unknown-linux-gnueabihf (ARMv7-A with vfpv3-d16 or later)
• Apple (requires Xcode)
  • x86_64-apple-macos
  • arm64-apple-macos
  • and other targets supported by your Xcode version
• Windows (requires Windows SDK)
  • x86_64-pc-windows-msvc
• Nvidia
  • nvptx64-nvidia-cuda

Build system integration

Bazel

This toolchain provides a Bazel rules integration. Consult the release notes for a quick start guide.

For more complex usage, see the Bazel API documentation.

Note that the Bazel integration currently does not target Windows. Cross-compiling from Windows hosts to Linux targets is supported.

CMake

This toolchain provides a CMake integration. Consult the release notes for a quick start guide.

Compatibility Notes

Linux

GNU vs MUSL

If you are compiling standalone executables, you can use the musl targets. This creates a fully static linked executable.

If you need to build dynamic libraries, or need to load system dynamic libraries, use the gnu targets. These create dynamically linked binaries that use an "old" glibc to maximize compatibility. The compiler runtime and libstdc++ are still linked statically.

With either option, "old" kernel headers are used to maximize compatibility with older operating systems.

For exact versions, consult the release notes.

macOS and Windows

Apple and Microsoft provide their own SDKs that are not redistributed with this toolchain. You must install Xcode or the Windows SDK/Visual Studio to target those operating systems.

License

The toolchains are released under their respective licenses. The code in this repository is licensed under the Apache License, Version 2.0.