Expand CI coverage and move actions into scripts

This change makes a couple changes to the CI workflow:
 - Adds more compiler coverage:
     - gcc to MacOS (see note below)
     - 32 and 64bit gcc and clang to Windows

 - With more builds, this separates them into per-OS workflow YAMLs
   (laying the foundation for more build environments: BSD? DOS? ... )

 - Moves all functional commands from GitHub-syntax-YAML into scripts,
   which (besides eliminating repeated code), now serve a dual-purpose
   of being runnable outside of GitHub.
     - One script takes care of listing dependent packages for the given
       runtime environment
     - Another script takes care of configuring and building

These scripts can be leveraged by a nightly build & asset generator in
the future.

Note: adding GCC to MacOS is now "correct" from a build perspective,
however to keep this PR focussed on the CI workflow I have not included
the coreMIDI / AppleBlocks code-fixes here (so for now, the gcc macOS
builds will fail; we will merge the coreMIDI / AppleBlocks later
depending on how upstream wants to handle it).

.github/workflows/build.yml

@@ -1,142 +0,0 @@
-name: "Build"
-
-on: [push]
-
-jobs:
-
-  build_gcc9:
-    name: "GCC 9 (ubuntu-18.04)"
-    runs-on: ubuntu-18.04
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        run: ./scripts/log-env.sh
-      - run: sudo apt update
-      - name: "Install packages"
-        run: sudo apt-get install g++-9 libsdl1.2-dev libsdl-net1.2-dev libsdl-sound1.2-dev
-      - name: "Build"
-        env:
-          CC: gcc-9
-          CXX: g++-9
-        run: |
-          # build steps
-          set -x
-          $CXX --version
-          ./autogen.sh
-          ./configure CXXFLAGS="-Wall -fdiagnostics-color=always"
-          make -j "$(nproc)" |& tee build.log
-      - name: "Summarize warnings"
-        run: python3 ./scripts/count-warnings.py build.log
-
-  build_gcc_ubuntu:
-    name: "GCC"
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-18.04, ubuntu-16.04]
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        run: ./scripts/log-env.sh
-      - run: sudo apt update
-      - name: "Install packages"
-        run: sudo apt-get install libsdl1.2-dev libsdl-net1.2-dev libsdl-sound1.2-dev
-      - name: "Build"
-        run: |
-          # build steps
-          set -x
-          g++ --version
-          ./autogen.sh
-          ./configure CXXFLAGS="-Wall -fdiagnostics-color=always"
-          make -j "$(nproc)" |& tee build.log
-      - name: "Summarize warnings"
-        run: python3 ./scripts/count-warnings.py build.log
-
-  build_clang:
-    name: "Clang (ubuntu-18.04)"
-    runs-on: ubuntu-18.04
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        run: ./scripts/log-env.sh
-      - run: sudo apt update
-      - name: "Install packages"
-        run: sudo apt-get install libsdl1.2-dev libsdl-net1.2-dev libsdl-sound1.2-dev
-      - name: "Build"
-        env:
-          CC: clang
-          CXX: clang++
-        run: |
-          # build steps
-          set -x
-          $CXX --version
-          ./autogen.sh
-          ./configure CXXFLAGS="-Wall"
-          make -j "$(nproc)" |& tee build.log
-      - name: "Summarize warnings"
-        run: python3 ./scripts/count-warnings.py build.log
-
-  build_macos:
-    name: "Clang (macOS-10.14)"
-    runs-on: macOS-10.14
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        run: ./scripts/log-env.sh
-      - run: brew update
-      - name: "Install packages"
-        run: brew install automake libpng sdl sdl_net sdl_sound
-      - name: "Build"
-        run: |
-          # build steps
-          set -x
-          clang++ --version
-          ./autogen.sh
-          ./configure CXXFLAGS="-Wall"
-          make -j "$(sysctl -n hw.physicalcpu)" 2>&1 | tee build.log
-      - name: "Summarize warnings"
-        run: python3 ./scripts/count-warnings.py build.log
-
-  build_msvc_debug:
-    name: "MSVC 14 Debug (win-2019)"
-    runs-on: windows-2019
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        shell: pwsh
-        run: .\scripts\log-env.ps1
-      - name: "Install packages"
-        shell: pwsh
-        run: |
-          vcpkg install libpng sdl1 sdl1-net
-          vcpkg integrate install
-      - name: "Build"
-        shell: pwsh
-        env:
-          PATH: '${env:PATH};C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\amd64'
-        run: |
-          # build steps
-          cd visualc_net
-          MSBuild -m dosbox.sln -p:Configuration=Debug
-
-  build_msvc_release:
-    name: "MSVC 14 Release (win-2019)"
-    runs-on: windows-2019
-    steps:
-      - uses: actions/checkout@v1
-      - name: "Log environment"
-        shell: pwsh
-        run: .\scripts\log-env.ps1
-      - name: "Install packages"
-        shell: pwsh
-        run: |
-          vcpkg install libpng sdl1 sdl1-net
-          vcpkg integrate install
-      - name: "Build"
-        shell: pwsh
-        env:
-          PATH: '${env:PATH};C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\amd64'
-        run: |
-          # build steps
-          cd visualc_net
-          MSBuild -m dosbox.sln -p:Configuration=Release

.github/workflows/linux.yml

@@ -0,0 +1,48 @@
+name: "Linux builds"
+on: push
+jobs:
+
+  build_ubuntu_gcc9:
+    name: "GCC 9 (ubuntu-18.04)"
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        run: ./scripts/log-env.sh
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt install -y $(./scripts/list-build-dependencies.sh --compiler-version 9)
+      - name: Build
+        run: ./scripts/build.sh --compiler-version 9 --lto
+      - name: "Summarize warnings"
+        run: ./scripts/count-warnings.py build.log
+
+  build_ubuntu_gcc_defaults:
+    name: "GCC"
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-18.04, ubuntu-16.04]
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        run: ./scripts/log-env.sh
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt install -y $(./scripts/list-build-dependencies.sh)
+      - name: Build
+        run: ./scripts/build.sh
+      - name: "Summarize warnings"
+        run: ./scripts/count-warnings.py build.log
+
+  build_ubuntu_clang_8:
+    name: "Clang 8 (ubuntu-18.04)"
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        run: ./scripts/log-env.sh
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt install -y $(./scripts/list-build-dependencies.sh --compiler clang --compiler-version 8)
+      - name: Build
+        run: ./scripts/build.sh --compiler clang --compiler-version 8 --lto
+      - name: "Summarize warnings"
+        run: ./scripts/count-warnings.py build.log

.github/workflows/macos.yml

@@ -0,0 +1,16 @@
+name: "macOS builds"
+on: push
+jobs:
+  build_macos_clang:
+    name: "Clang (macOS-10.14)"
+    runs-on: macOS-10.14
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        run: ./scripts/log-env.sh
+      - name: Install dependencies
+        run: brew install $(./scripts/list-build-dependencies.sh --compiler clang)
+      - name: Build
+        run: ./scripts/build.sh --compiler clang --lto
+      - name: "Summarize warnings"
+        run: python3 ./scripts/count-warnings.py build.log

.github/workflows/windows.yml

@@ -0,0 +1,142 @@
+#  SPDX-License-Identifier: GPL-2.0-or-later
+
+name: "Windows builds"
+on: push
+jobs:
+
+  build_msvc_debug:
+    name: "MSVC 14 Debug (win-2019)"
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        shell: pwsh
+        run: .\scripts\log-env.ps1
+      - name: "Install packages"
+        shell: pwsh
+        run: |
+          vcpkg install libpng sdl1 sdl1-net
+          vcpkg integrate install
+      - name: "Build"
+        shell: pwsh
+        env:
+          PATH: '${env:PATH};C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\amd64'
+        run: |
+          # build steps
+          cd visualc_net
+          MSBuild -m dosbox.sln -p:Configuration=Debug
+
+
+  build_msvc_release:
+    name: "MSVC 14 Release (win-2019)"
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v1
+      - name: "Log environment"
+        shell: pwsh
+        run: .\scripts\log-env.ps1
+      - name: "Install packages"
+        shell: pwsh
+        run: |
+          vcpkg install libpng sdl1 sdl1-net
+          vcpkg integrate install
+      - name: "Build"
+        shell: pwsh
+        env:
+          PATH: '${env:PATH};C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\Bin\amd64'
+        run: |
+          # build steps
+          cd visualc_net
+          MSBuild -m dosbox.sln -p:Configuration=Release
+
+
+  build_msys2_gcc_64:
+    name: MSYS2 GCC-9 x86_64
+    runs-on: windows-2019
+    env:
+      CHERE_INVOKING: yes
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install msys2 environment
+        run:  choco install msys2 --no-progress
+
+      - name: "Log environment"
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/log-env.sh"
+
+      - name: Install dependencies
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/list-build-dependencies.sh | xargs pacman -S --noconfirm"
+
+      - name: Build
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/build.sh --bin-path /mingw64/bin"
+
+      - name: Summarize warnings
+        run:  .\scripts\count-warnings.py build.log
+
+
+  build_msys2_gcc_32:
+    name: MSYS2 GCC-9 i686
+    runs-on: windows-2019
+    env:
+      CHERE_INVOKING: yes
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install msys2 environment
+        run:  choco install msys2 --no-progress
+
+      - name: "Log environment"
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/log-env.sh"
+
+      - name: Install dependencies
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/list-build-dependencies.sh --bit-depth 32 | xargs pacman -S --noconfirm"
+
+      - name: Build
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/build.sh --bit-depth 32 --bin-path /mingw32/bin"
+
+      - name: Summarize warnings
+        run:  .\scripts\count-warnings.py build.log
+
+
+  build_msys2_clang_64:
+    name: MSYS2 Clang-8 x86_64
+    runs-on: windows-2019
+    env:
+      CHERE_INVOKING: yes
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install msys2 environment
+        run:  choco install msys2 --no-progress
+
+      - name: "Log environment"
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/log-env.sh"
+
+      - name: Install dependencies
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/list-build-dependencies.sh --compiler clang | xargs pacman -S --noconfirm"
+
+      - name: Build
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/build.sh --compiler clang --bin-path /mingw64/bin"
+
+      - name: Summarize warnings
+        run:  .\scripts\count-warnings.py build.log
+
+
+  build_msys2_clang_32:
+    name: MSYS2 Clang-8 i686
+    runs-on: windows-2019
+    env:
+      CHERE_INVOKING: yes
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install msys2 environment
+        run:  choco install msys2 --no-progress
+
+      - name: "Log environment"
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/log-env.sh"
+
+      - name: Install dependencies
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/list-build-dependencies.sh --compiler clang --bit-depth 32 | xargs pacman -S --noconfirm"
+
+      - name: Build
+        run:  C:\tools\msys64\usr\bin\bash -lc "./scripts/build.sh --compiler clang --bit-depth 32 --bin-path /mingw32/bin"
+
+      - name: Summarize warnings
+        run:  .\scripts\count-warnings.py build.log