Update GitHub Actions config to switch Ubuntu 16.04 jobs to Docker containers.

The Ubuntu 16.04 environment is scheduled to be removed from GitHub Actions
in September 2021. Migrate those jobs to Docker containers or Ubuntu 18.04.

Also, added some older compilers. Ported CMake tests from Travis CI.

Based on https://github.com/boostorg/core/pull/95.
Closes https://github.com/boostorg/core/pull/95.

.github/workflows/ci.yml

@@ -1,3 +1,9 @@
+# Copyright 2020-2021 Peter Dimov
+# Copyright 2021 Andrey Semashev
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
 name: CI
 
 on:
@@ -14,32 +20,48 @@ concurrency:
 
 env:
   GIT_FETCH_JOBS: 8
-  UBSAN_OPTIONS: print_stacktrace=1
 
 jobs:
   posix:
+    defaults:
+      run:
+        shell: bash
+
     strategy:
       fail-fast: false
       matrix:
         include:
+          - toolset: gcc-4.4
+            cxxstd: "98,0x"
+            os: ubuntu-20.04
+            container: ubuntu:16.04
+            install: g++-4.4
+          - toolset: gcc-4.6
+            cxxstd: "03,0x"
+            os: ubuntu-20.04
+            container: ubuntu:16.04
+            install: g++-4.6
           - toolset: gcc-4.7
             cxxstd: "03,11"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: g++-4.7
           - toolset: gcc-4.8
             cxxstd: "03,11"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: g++-4.8
           - toolset: gcc-4.9
             cxxstd: "03,11"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: g++-4.9
           - toolset: gcc-5
             cxxstd: "03,11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
           - toolset: gcc-6
             cxxstd: "03,11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: g++-6
           - toolset: gcc-7
             cxxstd: "03,11,14,17"
@@ -58,40 +80,51 @@ jobs:
             cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
             install: g++-11
+          - name: UBSAN
+            toolset: gcc-11
+            cxxstd: "03,11,14,17,20"
+            ubsan: 1
+            os: ubuntu-20.04
+            install: g++-11
+
           - toolset: clang
             compiler: clang++-3.5
             cxxstd: "03,11"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.5
           - toolset: clang
             compiler: clang++-3.6
             cxxstd: "03,11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.6
           - toolset: clang
             compiler: clang++-3.7
             cxxstd: "03,11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.7
           - toolset: clang
             compiler: clang++-3.8
             cxxstd: "03,11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.8
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "03,11,14"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-3.9
           - toolset: clang
             compiler: clang++-4.0
             cxxstd: "03,11,14"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-4.0
           - toolset: clang
             compiler: clang++-5.0
             cxxstd: "03,11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-5.0
           - toolset: clang
             compiler: clang++-6.0
@@ -126,20 +159,49 @@ jobs:
             compiler: clang++-12
             cxxstd: "03,11,14,17,20"
             os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-12
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-20.04
+            install: libc++-12-dev libc++abi-12-dev
+            cxxflags: -stdlib=libc++
+            linkflags: -stdlib=libc++
+          - name: UBSAN
+            toolset: clang
+            compiler: clang++-12
+            cxxstd: "03,11,14,17,20"
+            ubsan: 1
+            os: ubuntu-20.04
+            install: libc++-12-dev libc++abi-12-dev
+            cxxflags: -stdlib=libc++
+            linkflags: -stdlib=libc++
+
           - toolset: clang
             cxxstd: "03,11,14,17,2a"
             os: macos-10.15
 
+          - name: CMake tests
+            cmake_tests: 1
+            os: ubuntu-20.04
+
     runs-on: ${{matrix.os}}
+    container: ${{matrix.container}}
 
     steps:
+      - name: Setup container
+        if: matrix.container
+        run: |
+            echo "GHA_CONTAINER=${{matrix.container}}" >> $GITHUB_ENV
+            apt-get -o Acquire::Retries=3 update && DEBIAN_FRONTEND=noninteractive apt-get -o Acquire::Retries=3 install -y sudo software-properties-common tzdata wget curl apt-transport-https make apt-file unzip libssl-dev build-essential autotools-dev autoconf automake g++ libc++-helpers python ruby cpio gcc-multilib g++-multilib pkgconf python3 ccache libpython-dev git cmake
+
       - uses: actions/checkout@v2
 
       - name: Install packages
         if: matrix.install
         run: |
+            for i in {1..3}; do sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test" && break || sleep 2; done
             sudo apt-get update
-          sudo apt-get install ${{matrix.install}}
+            sudo apt-get install -y ${{matrix.install}}
 
       - name: Setup GCC Toolchain
         if: matrix.gcc_toolchain
@@ -166,18 +228,32 @@ jobs:
             echo REF: $REF
             BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
             echo BOOST_BRANCH: $BOOST_BRANCH
+            BUILD_JOBS=$((nproc || sysctl -n hw.ncpu) 2> /dev/null)
+            echo "BUILD_JOBS=$BUILD_JOBS" >> $GITHUB_ENV
+            echo "CMAKE_BUILD_PARALLEL_LEVEL=$BUILD_JOBS" >> $GITHUB_ENV
+            DEPINST_ARGS=()
+            GIT_VERSION="$(git --version | sed -e 's/git version //')"
+            if $(dpkg --compare-versions "$GIT_VERSION" ge 2.8.0)
+            then
+                DEPINST_ARGS+=("--git_args" "--jobs $GIT_FETCH_JOBS")
+            fi
             cd ..
-          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+            git clone -b "$BOOST_BRANCH" --depth 1 "https://github.com/boostorg/boost.git" "boost-root"
             cd boost-root
             mkdir -p libs/$LIBRARY
             cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
             git submodule update --init tools/boostdep
-          python tools/boostdep/depinst/depinst.py --git_args "--jobs $GIT_FETCH_JOBS" $LIBRARY
+            if [ -n "${{matrix.extra_tests}}" ]
+            then
+                DEPINST_ARGS+=("--include" "example")
+            fi
+            DEPINST_ARGS+=("$LIBRARY")
+            python tools/boostdep/depinst/depinst.py "${DEPINST_ARGS[@]}"
             ./bootstrap.sh
-          ./b2 -d0 headers
+            ./b2 headers
 
       - name: Create user-config.jam
-        if: matrix.compiler
+        if: matrix.cmake_tests == '' && matrix.compiler != ''
         run: |
             echo -n "using ${{matrix.toolset}} : : ${{matrix.compiler}}" > ~/user-config.jam
             if [ -n "$GCC_TOOLCHAIN_ROOT" ]
@@ -187,10 +263,62 @@ jobs:
             echo " ;" >> ~/user-config.jam
 
       - name: Run tests
+        if: matrix.cmake_tests == ''
         run: |
-          BUILD_JOBS=$((nproc || sysctl -n hw.ncpu) 2> /dev/null)
             cd ../boost-root
-          ./b2 -j $BUILD_JOBS libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release
+            B2_ARGS=("-j" "$BUILD_JOBS" "toolset=${{matrix.toolset}}" "cxxstd=${{matrix.cxxstd}}" "variant=debug,release")
+            if [ -n "${{matrix.threading}}" ]
+            then
+                B2_ARGS+=("threading=${{matrix.threading}}")
+            fi
+            if [ -n "${{matrix.ubsan}}" ]
+            then
+                export UBSAN_OPTIONS="print_stacktrace=1"
+                B2_ARGS+=("cxxflags=-fsanitize=undefined -fno-sanitize-recover=undefined" "linkflags=-fsanitize=undefined -fuse-ld=gold" "define=UBSAN=1" "debug-symbols=on" "visibility=global")
+            fi
+            if [ -n "${{matrix.cxxflags}}" ]
+            then
+                B2_ARGS+=("cxxflags=${{matrix.cxxflags}}")
+            fi
+            if [ -n "${{matrix.linkflags}}" ]
+            then
+                B2_ARGS+=("linkflags=${{matrix.linkflags}}")
+            fi
+            B2_ARGS+=("libs/$LIBRARY/test")
+            ./b2 "${B2_ARGS[@]}"
+
+      - name: Run CMake tests
+        if: matrix.cmake_tests != ''
+        run: |
+            cd ../boost-root
+            export CMAKE_TEST=1
+            mkdir __build_cmake_test__ && cd __build_cmake_test__
+            cmake -DBUILD_TESTING=ON -DBOOST_INCLUDE_LIBRARIES=$LIBRARY ..
+            cmake --build . --target tests
+            ctest --output-on-failure
+
+      - name: Run CMake subdir tests
+        if: matrix.cmake_tests != ''
+        run: |
+            cd ../boost-root
+            export CMAKE_SUBDIR_TEST=1
+            cd libs/$LIBRARY/test/cmake_subdir_test && mkdir __build_cmake_subdir_test__ && cd __build_cmake_subdir_test__
+            cmake ..
+            cmake --build .
+            cmake --build . --target check
+
+      - name: Run CMake install tests
+        if: matrix.cmake_tests != ''
+        run: |
+            cd ../boost-root
+            export CMAKE_INSTALL_TEST=1
+            mkdir __build_cmake_install_test__ && cd __build_cmake_install_test__
+            cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DCMAKE_INSTALL_PREFIX=~/.local ..
+            cmake --build . --target install
+            cd libs/$LIBRARY/test/cmake_install_test && mkdir __build_cmake_install_test__ && cd __build_cmake_install_test__
+            cmake -DCMAKE_INSTALL_PREFIX=~/.local ..
+            cmake --build .
+            cmake --build . --target check
 
   windows:
     strategy: