WIP, BLD: add ppc64le, aarch64, s390x builds

Author: mattip

.travis.yml

@@ -4,7 +4,6 @@ env:
         # commit.
         - BUILD_COMMIT=c815b8f
         - REPO_DIR=OpenBLAS
-        - PLAT=x86_64
         - WHEELHOUSE_UPLOADER_USERNAME=travis-worker
         # Following generated with
         # travis encrypt -r MacPython/openblas-libs WHEELHOUSE_UPLOADER_SECRET=<the api key>
@@ -15,28 +14,49 @@ env:
 
 language: python
 sudo: required
-dist: trusty
+dist: xenial
 services: docker
 
 matrix:
   include:
     - os: linux
+      env:
+        - PLAT=x86_64
     - os: linux
       env:
         - PLAT=i686
     - os: osx
       language: objective-c
+      env:
+        - PLAT=x86_64
     - os: osx
       language: objective-c
       env:
         - PLAT=i686
     - os: linux
       env:
+        - PLAT=x86_64
         - INTERFACE64=1
     - os: osx
       language: objective-c
       env:
+        - PLAT=x86_64
         - INTERFACE64=1
+    - os: linux
+      arch: arm64
+      env:
+        - PLAT=aarch64
+        - MB_ML_VER=2014
+    - os: linux
+      arch: s390x
+      env:
+        - MB_ML_VER=2014
+        - PLAT=s390x
+    - os: linux
+      arch: ppc64le
+      env:
+        - MB_ML_VER=2014
+        - PLAT=ppc64le
 
 before_install:
     - source travis-ci/build_steps.sh

OpenBLAS

@@ -36,16 +36,19 @@ function build_lib {
     # Depends on globals
     #     BUILD_PREFIX - install suffix e.g. "/usr/local"
     #     GFORTRAN_DMG
+    #     MB_ML_VER
+    set -x
     local plat=${1:-$PLAT}
     local interface64=${2:-$INTERFACE64}
+    local manylinux=${MB_ML_VER:-1}
     # Make directory to store built archive
     if [ -n "$IS_OSX" ]; then
         # Do build, add gfortran hash to end of name
         do_build_lib "$plat" "gf_${GFORTRAN_SHA:0:7}" "$interface64"
         return
     fi
     # Manylinux wrapper
-    local docker_image=quay.io/pypa/manylinux1_$plat
+    local docker_image=quay.io/pypa/manylinux${manylinux}_${plat}
     docker pull $docker_image
     # Docker sources this script, and runs `do_build_lib`
     docker run --rm \
@@ -77,13 +80,17 @@ function do_build_lib {
     #
     # Depends on globals
     #     BUILD_PREFIX - install suffix e.g. "/usr/local"
+    set -v
     local plat=$1
     local suffix=$2
     local interface64=$3
     echo "Building with settings: '$plat' '$suffix' '$interface64'"
     case $plat in
         x86_64) local bitness=64 ;;
         i686) local bitness=32 ;;
+        aarch64) local bitness=64 ;;
+        s390x) local bitness=64 ;;
+        ppc64le) local bitness=64 ;;
         *) echo "Strange plat value $plat"; exit 1 ;;
     esac
     case $interface64 in