Update CI (#53)

Modernize the CI config.

Author: cdiener

.github/workflows/main.yml

@@ -28,10 +28,16 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Install Visual C++ for Python 2.7 and SWIG
+      - name: Install SWIG
         if: runner.os == 'Windows'
         run: choco install swig -f -y
 
+      - name: Set up QEMU
+        if: runner.os == 'Linux'
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+
       - name: Get versions
         id: version
         run: |
@@ -44,12 +50,15 @@ jobs:
         env:
           NEW_GLPK_VERSION: ${{ steps.version.outputs.glpk_version }}
           GLPK_HEADER_PATH: glpk-${{ steps.version.outputs.glpk_version }}/src
+          CIBW_ENVIRONMENT_LINUX: GLPK_HEADER_PATH=/include
           # install swig before build in each python environment
           # each job runs a python environment so this is equivalent to CIBW_BEFORE_ALL
           CIBW_BEFORE_BUILD_LINUX: source {project}/config.sh && pre_build
           CIBW_BEFORE_BUILD_MACOS: source {project}/config.sh && IS_OSX=true pre_build
           CIBW_BEFORE_BUILD_WINDOWS: rm -rf glpk_build && python scripts/build_glpk.py
-          CIBW_SKIP: pp*-win*
+          CIBW_ARCHS_MACOS: "x86_64"  # GLPK will not compile on silicon
+          CIBW_ARCHS_LINUX: "auto"
+          CIBW_SKIP: pp*-win* *-musllinux*
           # install before tests
           CIBW_TEST_COMMAND: cp {project}/test_swiglpk.py . && python test_swiglpk.py
 

config.sh

@@ -32,4 +32,6 @@ function pre_build {
             && make \
             && make install) || cat "glpk-$NEW_GLPK_VERSION/config.log"
     echo "Installed to $BUILD_PREFIX"
+    ls -ls /include
+    ls -ls .
 }