Attempt arm64 build too.

Author: bluescarni

.circleci/config.yml

@@ -25,6 +25,15 @@ jobs:
     - run:
         name: Build and test
         command: bash ./tools/circleci_bionic_conda_pagmo_head_39.sh
+  ubuntu_arm64:
+    machine:
+      image: ubuntu-2004:202101-01
+    resource_class: arm.medium
+    steps:
+    - checkout
+    - run:
+        name: Build and test
+        command: bash ./tools/circleci_ubuntu_arm64.sh
 
 workflows:
   version: 2.1
@@ -33,3 +42,4 @@ workflows:
     - bionic_conda_pagmo_head_38
     - bionic_conda_pagmo_head_37
     - bionic_conda_pagmo_head_39
+    - ubuntu_arm64

tools/circleci_ubuntu_arm64.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# Echo each command
+set -x
+
+# Exit on error.
+set -e
+
+# Core deps.
+sudo apt-get install wget
+
+# Install conda+deps.
+wget https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-aarch64.sh -O miniconda.sh
+export deps_dir=$HOME/local
+export PATH="$HOME/miniconda/bin:$PATH"
+bash miniconda.sh -b -p $HOME/miniconda
+conda create -y -q -p $deps_dir c-compiler cxx-compiler cmake eigen nlopt boost-cpp tbb tbb-devel python=3.8 numpy cloudpickle networkx dill numba pybind11 scipy
+source activate $deps_dir
+
+# Install pagmo.
+git clone https://github.com/esa/pagmo2.git
+cd pagmo2
+mkdir build
+cd build
+cmake ../ -DCMAKE_BUILD_TYPE=Debug -DBoost_NO_BOOST_CMAKE=ON -DPAGMO_WITH_EIGEN3=ON -DPAGMO_WITH_NLOPT=ON -DCMAKE_PREFIX_PATH=$deps_dir -DCMAKE_INSTALL_PREFIX=$deps_dir -DPAGMO_ENABLE_IPO=ON -DPAGMO_INSTALL_LIBDIR=lib
+make -j4 install VERBOSE=1
+cd ..
+cd ..
+
+# Create the build dir and cd into it.
+mkdir build
+cd build
+
+# Build pygmo.
+cmake ../ -DCMAKE_BUILD_TYPE=Debug -DBoost_NO_BOOST_CMAKE=ON -DCMAKE_PREFIX_PATH=$deps_dir -DCMAKE_INSTALL_PREFIX=$deps_dir -DPYGMO_ENABLE_IPO=ON
+make -j2 install VERBOSE=1
+cd
+
+# Run the test suite.
+python -c "import pygmo; pygmo.test.run_test_suite(1); pygmo.mp_island.shutdown_pool(); pygmo.mp_bfe.shutdown_pool()"
+
+# Run the additional tests.
+cd ~/project/tools
+python circleci_additional_tests.py
+
+set +e
+set +x