Compiling from Source

It is highly recommended that you not compile Larch from the source code, but instead just use the pre-built packages available through conda.

If you do attempt to compile from source and have some trouble, here are some tips:


  • You will find it easier to use clang and openmp from conda, but you probably also need the plain XCode installed (get it from the Mac App Store).

    xcode-select --install
    conda install clangdev llvmdev openmp -c conda-forge
  • If you encounter fatal error: ‘stdio.h’ file not found when compiling, you may need to update your SDK headers. See a discussion here or skip to the solution:

    open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg


  • Don’t.
  • The Windows build for Larch is generated automatically after successful testing on Appveyor. If you want to build Larch for Windows yourself, the first step is to look deep inside your soul and ask yourself if it’s really worth giving up that much of your life to do so. If after doing that you still want to proceed, you can try to follow along with the build instructions from appveyor.yml in the Larch github repository.