Implement Github actions for CI

[Viral B. Shah]

Would be nice to transition to github actions and test on mac, linux and windows. Help appreciated!

[Viral B. Shah]

Implemented in 9dd3049 but needs to be fixed for Windows.

[Viral B. Shah]

Attempting in #240 but could clearly benefit from someone who knows this stuff better than me!

[Viral B. Shah]

@DilumAluthge @giordano Could use your help here to get windows 32-bit testing correctly (currently disabled) - and generally taking a look at the ci file to see if I have done it right.

https://github.com/JuliaMath/openlibm/blob/master/.github/workflows/ci.yml

[Dilum Aluthge]

Just FYI, @giordano is on vacation.

Can you summarize the issue you're having with Windows 32-bit?

[Dilum Aluthge]

openlibm/.github/workflows/ci.yml

Lines 38 to 44 in 6ea5fa2

       - name: Install i686-w64-mingw32-gcc 
         if: ${{ matrix.os == 'windows-latest' && matrix.arch == 'x86' }} 
         shell: bash 
         run: | 
           choco install mingw -y --x86 --force --params "/exception:sjlj" 
           choco install make -y 
           echo "CC=i686-w64-mingw32-gcc" >> "${GITHUB_ENV}" 

I'm guessing this is the part that's causing problems?

[Dilum Aluthge]

Apart from that part, the CI file looks pretty normal to me.

[Dilum Aluthge]

Hmmm. On Windows x86, should we do make ARCH=i386 instead of make?

[Dilum Aluthge]

So, just as an example, you might replace this:

- name: Build and run tests
  run: make && make test

With this:

- name: Build
  run: make
  if: ${{ matrix.os != 'windows-latest' || matrix.arch != 'x86' }}

- name: Build (Windows x86)
  run: make ARCH=i386
  if: ${{ matrix.os == 'windows-latest' && matrix.arch == 'x86' }}

- name: Run tests
  run: make test

[Viral B. Shah]

I approved the workflow.

[Viral B. Shah]

#243 closes this