conda_build_config.yaml

macos_machine:                 # [osx]
  - x86_64-apple-darwin13.4.0  # [osx and x86_64]
  - arm64-apple-darwin20.0.0   # [osx and arm64]
MACOSX_DEPLOYMENT_TARGET:      # [osx]
  - 11.0                       # [osx and arm64]
  - 10.9                       # [osx and x86_64]
CONDA_BUILD_SYSROOT:
 - /Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk  # [osx and arm64]
 # - /opt/MacOSX11.1.sdk/  # [osx and arm64]

# use vs2019 on Windows
cxx_compiler:                  # [win]
- vs2019                       # [win]
c_compiler:                    # [win]
- vs2019                       # [win]