Install autoconf 2.71 in the docker image. Upstream libffi requires autoconf 2.71, so we should try to use it too.
package:
  name: rebound
  version: 3.19.8
  top-level:
    - rebound
build:
  exports: requested
  post: |
    mkdir -p $WASM_LIBRARY_DIR/include/rebound/
    mkdir -p $WASM_LIBRARY_DIR/lib/
    cp $WHEELDIR/rebound/*.h $WASM_LIBRARY_DIR/include/rebound/
    cp $WHEELDIR/librebound.cpython-*.so $WASM_LIBRARY_DIR/lib/

source:
  url: https://files.pythonhosted.org/packages/b9/e4/aae78477fc9462ccdf2017ae1fa38c7048cdac0c2af60cff57f69c019cc9/rebound-3.19.8.tar.gz
  sha256: 827c4f83785f129cbcaba46fd57f62d3a98af231d0ec8e5af3aa9302c424ffa6
requirements:
  run:
    - numpy
about:
  home: https://github.com/hannorein/rebound/
  PyPI: https://pypi.org/project/rebound
  summary: An open-source multi-purpose N-body code
  license: GPL

package:
  name: rebound
  version: 3.19.8
  top-level:
    - rebound
build:
  exports: requested
  post: |
    mkdir -p $WASM_LIBRARY_DIR/include/rebound/
    mkdir -p $WASM_LIBRARY_DIR/lib/
    cp $WHEELDIR/rebound/*.h $WASM_LIBRARY_DIR/include/rebound/
    cp $WHEELDIR/librebound.cpython-*.so $WASM_LIBRARY_DIR/lib/

source:
  url: https://files.pythonhosted.org/packages/b9/e4/aae78477fc9462ccdf2017ae1fa38c7048cdac0c2af60cff57f69c019cc9/rebound-3.19.8.tar.gz
  sha256: 827c4f83785f129cbcaba46fd57f62d3a98af231d0ec8e5af3aa9302c424ffa6
requirements:
  run:
    - numpy
about:
  home: https://github.com/hannorein/rebound/
  PyPI: https://pypi.org/project/rebound
  summary: An open-source multi-purpose N-body code
  license: GPL
