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Add how to install numpy in M1 #1129

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Add how to install numpy in M1 #1129

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40 changes: 40 additions & 0 deletions README.md
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Expand Up @@ -67,6 +67,46 @@ Then, choose one of the following options according to your use case:

For informations on how we publish to conda-forge, see [openfisca-core-feedstock](https://github.com/openfisca/openfisca-core-feedstock/blob/master/recipe/README.md).

### Compiling `numpy` from source

If you're running on an Apple M1 or any ARMv8.X-A CPU, chances are `numpy` fails to install. If that is so, you can either:

1. Bump `numpy` to 1.22+ an create a pull request to help us fully support that version :)
2. Install OpenFisca-Core via Conda (see below)
3. Compile `numpy` from source

For the latter, run in your console:

```sh
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install gcc
export CC=/opt/homebrew/opt/gcc@11/bin/gcc-11
export LD=/opt/homebrew/opt/gcc@11/bin/gcc-11
export CXX=/opt/homebrew/opt/gcc@11/bin/g++-11
export CPP=/opt/homebrew/opt/gcc@11/bin/cpp-11
brew install blis pyenv
brew install --build-from-source zlib libffi libyaml libressl readline openblas
export CPPFLAGS="-I$(brew --prefix libressl)/include -I$(brew --prefix readline)/include -I$(brew --prefix zlib)/include -I/$(brew --prefix libffi)/include -I/$(brew --prefix libyaml)/include"
export LDFLAGS="-L$(brew --prefix libre)/lib -L$(brew --prefix readline)/lib -L$(brew --prefix zlib)/lib -L$(brew --prefix libffi)/lib -L$(brew --prefix libyaml)/lib"
git clone [email protected]:numpy/numpy.git
cd numpy
git checkout v1.20.3
xargs -I % echo % > site.cfg << EOF
[openblas]
libraries = openblas
library_dirs = /opt/homebrew/opt/openblas/lib
include_dirs = /opt/homebrew/opt/include
runtime_library_dirs = /opt/homebrew/opt/openblas
[blis]
libraries = blis
library_dirs = /opt/homebrew/opt/blis/lib
include_dirs = /opt/homebrew/opt/blis/include/blis
runtime_library_dirs = /opt/homebrew/opt/blis/lib
EOF
pyenv install --version 3.8.X --force
python setup.py build --cpu-baseline=min --cpu-dispatch=none install
```

## Testing

To run the entire test suite:
Expand Down