Try simplifying build to use Rtools

Author: matthew-brett

.github/workflows/build.yml

@@ -1,5 +1,3 @@
-# This is a basic workflow to help you get started with Actions
-
 name: Windows build
 
 defaults:
@@ -31,59 +29,43 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - uses: ilammy/msvc-dev-cmd@v1
+      - name: install-rtools
+        run: |
+          choco install rtools --no-progress
+      - name: show-gfortran
+        run: |
+          gcc --version
+          gfortran --version
 
-      - name: Setup
+      - name: Set env variables
         run: |
           BITS=${{ matrix.BUILD_BITS }}
           echo "BUILD_BITS=$BITS" >> $GITHUB_ENV;
+          # For interpretation of MSYSTEM, see:
+          # https://sourceforge.net/p/msys2/discussion/general/thread/b7dfdac8/#3939
           if [ "$BITS" == "32" ]; then
-            echo "PLAT=i686" >> $GITHUB_ENV;
+            echo "PLAT=i686" >> $GITHUB_ENV
+            echo "MSYSTEM=MINGW32" >> $GITHUB_ENV
+            echo "LDFLAGS='-static -static-libgcc'" >> $GITHUB_ENV
           else
-            echo "PLAT=x86_64" >> $GITHUB_ENV;
+            echo "PLAT=x86_64" >> $GITHUB_ENV
+            echo "MSYSTEM=UCRT64" >> $GITHUB_ENV
+            echo "LDFLAGS='-lucrt -static -static-libgcc'" >> $GITHUB_ENV
           fi
-          echo "START_DIR=$PWD" >> $GITHUB_ENV;
-          choco install -y zip
-
-      - run: |
-          choco install -y mingw --forcex86 --force --version=8.1.0
-          choco install -y make
-        name: Install 32-bit mingw
-        shell: powershell
-        if: ${{ matrix.BUILD_BITS == '32' }}
-
-      - run: |
-          # see https://www.mail-archive.com/[email protected]/msg586184.html
-          if [ "${{ matrix.BUILD_BITS }}" == "64" ]; then
-            include=/c/ProgramData/Chocolatey/lib/mingw/tools/install/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/avx512fintrin.h
-          else
-            include=/c/ProgramData/Chocolatey/lib/mingw/tools/install/mingw32/lib/gcc/i686-w64-mingw32/8.1.0/include/avx512fintrin.h
+          echo "START_DIR=$PWD" >> $GITHUB_ENV
+          if [ "${{ matrix.INTERFACE64 }}" == "1" ]; then
+            echo "INTERFACE64=1" >> $GITHUB_ENV
           fi
-          sed -i -e"s/_mm512_abs_pd (__m512 __A)/_mm512_abs_pd (__m512d __A)/" $include
-        name: Fix gcc bug
+          # Preserve the current working directory in bash call.
+          echo "CHERE_INVOKING='yes'" >> $GITHUB_ENV
 
       - name: Build
         run: |
-          BITS=${{ matrix.BUILD_BITS }}
-          if [ "${{ matrix.INTERFACE64 }}" == "1" ]; then
-            export INTERFACE64=1
-          fi
-          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
+          /c/rtools40/usr/bin/bash -lc 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:$PATH
-          fi
-          if [ "${{ matrix.INTERFACE64 }}" == "1" ]; then
-            export INTERFACE64=1
-          fi
           tools/build_gfortran.sh
           cp test.exe builds
           cp test_dyn.exe builds