Add support to AArch64 wheel

.travis.yml

@@ -28,6 +28,27 @@ jobs:
       # Exclude the default Python 3.5 build
       - python: 3.5
   include:
+    - stage: Build and test wheel
+      os: linux
+      arch: arm64-graviton2
+      dist: focal
+      virt: vm
+      group: edge
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - PLAT=aarch64
+        - NP_BUILD_DEP=numpy==1.19.1
+        - CYTHON_BUILD_DEP="Cython"
+        - DOCKER_IMAGE=quay.io/pypa/manylinux2014_${PLAT}
+      script:
+        - echo "This stage will just build AArch64 wheel"
+      workspaces:
+        create:
+          name: ws1
+          paths:
+            - wheelhouse
+      after_success:
+        - echo "This stage will not upload aarch64 wheel"
     - os: linux
       env:
         - MB_PYTHON_VERSION=3.6
@@ -88,6 +109,22 @@ jobs:
         - CYTHON_BUILD_DEP="Cython"
         - MB_PYTHON_OSX_VER=10.9
 
+    - stage: Test wheel
+      arch: arm64-graviton2
+      dist: focal
+      virt: vm
+      group: edge
+      env:
+        - MB_PYTHON_VERSION=3.7
+        - PLAT=aarch64
+        - NP_TEST_DEP=numpy==1.19.1
+        - CYTHON_BUILD_DEP="Cython"
+        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
+      workspaces:
+        use: ws1
+      install:
+        - echo "This stage will test and upload the AArch64 wheel"
+
 before_install:
     - if [ "$TRAVIS_BRANCH" == "master" ]; then
           CONTAINER="pre-release";

config.sh

@@ -63,15 +63,19 @@ function build_osx_wheel {
 function run_tests {
     # Runs tests on installed distribution from an empty directory
     # OSX tests seem to time out pretty often
-    if [ -z "$IS_OSX" ]; then
+    if [[ -z "$IS_OSX" && `uname -m` != 'aarch64' ]]; then
         local testmode="full"
     else
         local testmode="fast"
     fi
     # Check bundled license file
     python ../check_installed_package.py
     # Run tests
-    python ../run_scipy_tests.py $testmode -- -n2 -rfEX
+    if [[ -z "$IS_OSX" && `uname -m` != 'aarch64' ]]; then
+        python ../run_scipy_tests.py $testmode -- -n2 -rfEX
+    else
+        python ../run_scipy_tests.py $testmode -- -n8 -rfEX
+    fi
     # Show BLAS / LAPACK used
     python -c 'import scipy; scipy.show_config()'
 }