add github workflow to build on windows

Author: mattip

.github/workflows/build.yml

@@ -2,33 +2,83 @@
 
 name: CI
 
-# Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the master branch
+defaults:
+  run:
+    shell: bash  
+
 on:
   push:
     branches: [ master ]
   pull_request:
     branches: [ master ]
 
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+env:
+  OPENBLAS_COMMIT: 349b722d8d09303
+  OPENBLAS_ROOT: "c:\\opt"
+
 jobs:
-  # This workflow contains a single job called "build"
   build:
     strategy:
       matrix:
         BUILD_BITS: [64, 32]
         INTERFACE64: ['1', '']
         os: [windows-latest]
-    # The type of runner that the job will run on
+        exclude:
+          - BUILD_BITS: 32
+            INTERFACE64: 1
+          
     runs-on: ${{ matrix.os }}
 
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
+      - uses: ilammy/msvc-dev-cmd@v1
+
+      - name: Setup
+        run: |
+          BITS=${{ matrix.BUILD_BITS }}
+          echo "BUILD_BITS=$BITS" >> $GITHUB_ENV;
+          if [ "$BITS" == "32" ]; then
+            echo "PLAT=i686" >> $GITHUB_ENV;
+            
+          else
+            echo "PLAT=x86_64" >> $GITHUB_ENV;
+          fi
+          echo "START_DIR=$PWD" >> $GITHUB_ENV;
+          choco install -y zip
 
-      # Runs a set of commands using the runners shell
-      - name: Run a multi-line script
+      - run: |
+          choco install -y mingw --forcex86 --force --version=7.3.0
+          refreshenv
+          echo "C:\\ProgramData\\chocolatey\\lib\\mingw\\tools\\install\\mingw32\\bin" >> $GITHUB_PATH;
+        name: Install 32-bit mingw
+        shell: powershell
+        if: ${{ matrix.BUILD_BITS == '32' }}
+
+      - name: Build
+        run: |
+          BITS=${{ matrix.BUILD_BITS }}
+          if [ "$BITS" == "32" ]; then
+            export PATH=/c/ProgramData/chocolatey/lib/mingw/tools/install/mingw32/bin:$PATH
+          fi
+          echo $PATH
+          git submodule update --init --recursive
+          tools/build_openblas.sh
+
+      - name: Test
+        run: |
+          BITS=${{ matrix.BUILD_BITS }}
+          if [ "$BITS" == "32" ]; then
+            export PATH=/c/ProgramData/chocolatey/lib/mingw/tools/install/mingw32/bin:$PATH
+          fi
+          tools/build_gfortran.sh
+          cp test.exe builds
+          cp test_dyn.exe builds
+          ./test.exe
+          cp $(cygpath $OPENBLAS_ROOT)/$BITS/bin/*.dll .
+          ./test_dyn.exe
+        
+      - name: Upload
         run: |
-          echo Add other actions to build,
-          echo test, and deploy your project.
+          pip install -q git+https://github.com/Anaconda-Platform/[email protected]
+          # upload_to_anaconda_staging.sh
+        

tools/build_openblas.sh

@@ -4,13 +4,13 @@
 #  OPENBLAS_ROOT
 #  OPENBLAS_COMMIT
 #  BUILD_BITS
-#  VC9_ROOT
+#  START_DIR
+# Expects "lib.exe" and "gcc" to be on the path
 
-set -e
+set -ex
 
 # Paths in Unix format
 OPENBLAS_ROOT=$(cygpath "$OPENBLAS_ROOT")
-VC9_ROOT=$(cygpath "$VC9_ROOT")
 
 # Our directory for later copying
 our_wd=$(cygpath "$START_DIR")
@@ -20,6 +20,7 @@ rm -rf builds
 mkdir builds
 
 cd OpenBLAS
+git submodule update --init --recursive
 
 # Check which gcc we're using
 which gcc
@@ -42,11 +43,12 @@ if [ "$BUILD_BITS" == 64 ]; then
 else
     march=pentium4
     extra="-mfpmath=sse -msse2"
+    fextra="-m32"
     vc_arch="i386"
     plat_tag="win32"
 fi
 cflags="-O2 -march=$march -mtune=generic $extra"
-fflags="$cflags -frecursive -ffpe-summary=invalid,zero"
+fflags="$fextra $cflags -frecursive -ffpe-summary=invalid,zero"
 
 # Set suffixed-ILP64 flags
 if [ "$INTERFACE64" == "1" ]; then
@@ -91,7 +93,7 @@ cd $BUILD_BITS/lib
 # export library. Maybe fixed in later binutils by patch referred to in
 # https://sourceware.org/ml/binutils/2016-02/msg00002.html
 cp ${our_wd}/OpenBLAS/exports/${DLL_BASENAME}.def ${DLL_BASENAME}.def
-"$VC9_ROOT/bin/lib.exe" /machine:${vc_arch} /def:${DLL_BASENAME}.def
+"lib.exe" /machine:${vc_arch} /def:${DLL_BASENAME}.def
 cd ../..
 # Build template site.cfg for using this build
 cat > ${BUILD_BITS}/site.cfg.template << EOF