clang-build also allows you to use a different toolchain than llvm-clang. For this, you need to create a Python-file which you pass to clang-build as clang-build … –toolchain=/path/to/ and which defines the following function

import clang_build

def get_toolchain(environment) -> clang_build.toolchain.Toolchain:
    toolchain = clang_build.toolchain.Toolchain()
    return toolchain

The important part is the signature. Instead of using the default toolchain provided by clang-build, you should derive from it or define a new one from scratch.

The toolchain needs to provide
  • the build platform (on which clang-build is being run), e.g.
    • windows
    • osx
    • linux
  • the host platform (on which the build results may be run), e.g.
    • windows
    • osx
    • linux
    • web / browser
  • the host architecture (on which to run the built binaries), e.g.
    • x86
    • GPU
    • web / wasm
  • a list of supported C-dialect languages, e.g.
    • C
    • C++
    • CUDA-C
    • CUDA-C++
    • OpenCL
    • Objective-C
    • Objective-C++
  • default compile and link flags for all target types (executable, …) for all build types (debug, …) for the available languages for the given combination of build and host platform