The last latest passing build was in 2021, and it looks like Travis hasn't run since then.
I think we should make it start working again, because #1651 says use 4.0 (5 years ago) or latest passing build(4 years ago)

It looks like the current ci state is

• github actions test report
  • makes a nice display for all the junit tests in the basic workflow
• github actions basic workflow
  • clang-format
  • codeql
  • autotools autoreconf, configure, and make
    • mac: make tdd with gcc & clang
    • ubuntu: make tdd with gcc, clang, and --disable-longlong
    • ubuntu: make dist and make install
    • windows-latest make tdd
  • cmake: cmake & cmake --build && ctest, and sometimes make --install && build examples against install
    • ubuntu:
      • clang CXX standards 98, 11, 14, 17, 20
      • gnu CXX standards 98, 14, 17, 20
      • gnu install with CXX 11
      • presets
        • No long long
        • Detailed
        • No C++ Standard Library
        • No RTTI
        • No Exceptions
        • No C Standard Library
        • Address Sanitizer
        • GCC ARM embedded
        • clang-tidy
        • mingw
        • arm-embedded
        • OpenWatcom DOS with dosbox
      • run lcov
    • macos
      • install
      • clang CXX standards 14, 17, 20
      • gcc CXX standard 14
    • windows:
      • Cygwin with preset GNU
      • ClangCL CXX standard 17
      • MSVC CXX standard 20
      • MSVC install
  • make: under ubuntu do make -f Makefile_using_MakefileWorker with the following targets
    • test_defaults
    • test_disable_std_cpp
    • test_disable_memory_leak_detection
    • test_disable_std_cpp_and_leak_detection
    • test_disable_debug
    • test_override_flags
    • test_disable_std_c
    • test_target_platform
    • test_override_and_disable
    • test_examples
    • test_junit_output
    • test_vpath
    • test_vpath_install
    • commented out: test_gcov
  • make_dos
    • build with dosbox and github.com/cpputest/watcom-compiler and platforms/Dos/Makefile
    • run make test, which just calls platforms/Dos/alltets.sh
  • docker: push to docker hub
    • "dos": uses scripts/travis_ci_build.sh
      • build with dosbox and github.com/cpputest/watcom-compiler and platforms/Dos/Makefile
      • run platforms/Dos/alltets.sh
      • this is the same as the make_dos job, but it goes through the travis ci script
    • "ubuntu": autoreconf and configure and make tdd
• appveyor
  • windows stuff with visual studio project stuff
• circleci
  • running and reporting success, with an invocation of the travis ci script that was commented out three years ago
• travis
  • just not running anymore

Questions:

• Can we remove circle ci and travis ci configs?
• can the github docker dos job be rebuild to not use travis ci scripts like the make_dos job, so we can delete the travis ci scripts?
• do we want latest-passing-build to only be done if github workflows and appveyor pass?
  • would be easy to copy the test-report trigger if we ignore appveyor
  • I can write an action that does this either way, but we might run into issues with actions triggering on actions without using a GITHUB_TOKEN from a service account
• can we move appveyor into github actions?
  • I don't know anything about visual studio projects and I don't want to, but if someone else does this it would simplify doing the latest-passing-build