diff --git a/libcxx/utils/ci/buildkite-pipeline.yml b/libcxx/utils/ci/buildkite-pipeline.yml
--- a/libcxx/utils/ci/buildkite-pipeline.yml
+++ b/libcxx/utils/ci/buildkite-pipeline.yml
@@ -18,463 +18,6 @@
 #
 
 steps:
-  #
-  # Light pre-commit tests for things like formatting or when people forget
-  # to update generated files.
-  #
-  - label: "Format"
-    command: "libcxx/utils/ci/run-buildbot check-format"
-    artifact_paths:
-      - "**/clang-format.patch"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-    soft_fail:
-        - exit_status: 1
-
-  - label: "Generated output"
-    command: "libcxx/utils/ci/run-buildbot check-generated-output"
-    artifact_paths:
-      - "**/generated_output.patch"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  #
-  # General testing with the default configuration, under all the supported
-  # Standard modes, with Clang and GCC. This catches most issues upfront.
-  # The goal of this step is to catch most issues while being very fast.
-  #
-  - wait
-
-  - label: "C++2b"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx2b"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "C++20"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx20"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "C++17"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx17"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "C++14"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx14"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-  - label: "C++11"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx11"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "C++03"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx03"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "GCC 11"
-    command: "libcxx/utils/ci/run-buildbot generic-gcc"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  #
-  # All other supported configurations of libc++.
-  #
-  - wait
-
-  - label: "Clang 11"
-    command: "libcxx/utils/ci/run-buildbot generic-clang-11"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Clang 12"
-    command: "libcxx/utils/ci/run-buildbot generic-clang-12"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "-fno-exceptions"
-    command: "libcxx/utils/ci/run-buildbot generic-noexceptions"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Modular build"
-    command: "libcxx/utils/ci/run-buildbot generic-modules"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Static libraries"
-    command: "libcxx/utils/ci/run-buildbot generic-static"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Assertions enabled"
-    command: "libcxx/utils/ci/run-buildbot generic-assertions"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Debug iterators"
-    command: "libcxx/utils/ci/run-buildbot generic-debug-iterators"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "ASAN"
-    command: "libcxx/utils/ci/run-buildbot generic-asan"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "TSAN"
-    command: "libcxx/utils/ci/run-buildbot generic-tsan"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "UBSAN"
-    command: "libcxx/utils/ci/run-buildbot generic-ubsan"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "With LLVM's libunwind"
-    command: "libcxx/utils/ci/run-buildbot generic-with_llvm_unwinder"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Single-threaded"
-    command: "libcxx/utils/ci/run-buildbot generic-singlethreaded"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "No debug mode"
-    command: "libcxx/utils/ci/run-buildbot generic-no-debug"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "No Filesystem"
-    command: "libcxx/utils/ci/run-buildbot generic-no-filesystem"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "No random device"
-    command: "libcxx/utils/ci/run-buildbot generic-no-random_device"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "No locale"
-    command: "libcxx/utils/ci/run-buildbot generic-no-localization"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Benchmarks"
-    command: "libcxx/utils/ci/run-buildbot benchmarks"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Documentation"
-    command: "libcxx/utils/ci/run-buildbot documentation"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Legacy Lit configuration"
-    command: "libcxx/utils/ci/run-buildbot legacy-test-config"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Legacy standalone build"
-    command: "libcxx/utils/ci/run-buildbot legacy-standalone"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Unified standalone build"
-    command: "libcxx/utils/ci/run-buildbot unified-standalone"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Runtimes build"
-    command: "libcxx/utils/ci/run-buildbot runtimes-build"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Windows (DLL)"
-    command: "bash libcxx/utils/ci/run-buildbot windows-dll"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "windows"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Windows (Static)"
-    command: "bash libcxx/utils/ci/run-buildbot windows-static"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "windows"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "32 bit"
-    command: "libcxx/utils/ci/run-buildbot generic-32bit"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "MacOS C++20"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx20"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    agents:
-      queue: "libcxx-builders-macos"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  # Build with the configuration we use to generate libc++.dylib on Apple platforms
-  - label: "Apple system"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-macos"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Apple system -fno-exceptions"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system-noexceptions"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-macos"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  # Test back-deployment to older Apple platforms
-  - label: "Apple back-deployment macosx10.9"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system-backdeployment-10.9"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-macos10.15" # TODO: For now, we're running the back-deployment tests for 10.9 on 10.15, because we don't have proper 10.9 machines
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Apple back-deployment macosx10.15"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system-backdeployment-10.15"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-macos10.15"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
   - label: "AArch64"
     command: "libcxx/utils/ci/run-buildbot aarch64"
     artifact_paths:
@@ -487,18 +30,6 @@
         - exit_status: -1  # Agent was lost
           limit: 2
 
-  - label: "AArch64 -fno-exceptions"
-    command: "libcxx/utils/ci/run-buildbot aarch64-noexceptions"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-linaro-arm"
-      arch: "aarch64"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
   - label: "Armv8"
     command: "libcxx/utils/ci/run-buildbot armv8"
     artifact_paths:
@@ -510,39 +41,3 @@
       automatic:
         - exit_status: -1  # Agent was lost
           limit: 2
-
-  - label: "Armv8 -fno-exceptions"
-    command: "libcxx/utils/ci/run-buildbot armv8-noexceptions"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-linaro-arm"
-      arch: "armv8l"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Armv7"
-    command: "libcxx/utils/ci/run-buildbot armv7"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-linaro-arm"
-      arch: "armv8l" # Compiling for v7, running on v8 hardware
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-
-  - label: "Armv7 -fno-exceptions"
-    command: "libcxx/utils/ci/run-buildbot armv7-noexceptions"
-    artifact_paths:
-      - "**/test-results.xml"
-    agents:
-      queue: "libcxx-builders-linaro-arm"
-      arch: "armv8l" # Compiling for v7, running on v8 hardware
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
diff --git a/libcxx/utils/ci/run-buildbot b/libcxx/utils/ci/run-buildbot
--- a/libcxx/utils/ci/run-buildbot
+++ b/libcxx/utils/ci/run-buildbot
@@ -145,393 +145,21 @@
 ${NINJA} --version
 
 case "${BUILDER}" in
-check-format)
-    clean
-    echo "+++ Checking formatting"
-    # We need to set --extensions so that clang-format checks extensionless files.
-    mkdir -p ${BUILD_DIR}
-    git-clang-format \
-        --binary /usr/bin/clang-format --diff \
-        --extensions ',h,hh,hpp,hxx,c,cc,cxx,cpp' HEAD~1 \
-        -- \
-            libcxx/{benchmarks,include,src,test} \
-            libcxxabi/{fuzz,include,src,test} \
-        | tee ${BUILD_DIR}/clang-format.patch
-    # Check if the diff is empty, fail otherwise.
-    ! grep -q '^--- a' ${BUILD_DIR}/clang-format.patch
-;;
-check-generated-output)
-    # `! foo` doesn't work properly with `set -e`, use `! foo || false` instead.
-    # https://stackoverflow.com/questions/57681955/set-e-does-not-respect-logical-not
-    clean
-    echo "+++ Checking the output of the generator scripts"
-    mkdir -p ${BUILD_DIR}
-    # Reject patches that don't update the generated output correctly.
-    python3 libcxx/utils/generate_feature_test_macro_components.py
-    python3 libcxx/utils/generate_header_inclusion_tests.py
-    python3 libcxx/utils/generate_header_tests.py
-    git diff | tee ${BUILD_DIR}/generated_output.patch
-    # Check if the diffs are empty, fail otherwise.
-    ! grep -q '^--- a' ${BUILD_DIR}/generated_output.patch || false
-    # Reject patches that introduce non-ASCII characters or hard tabs.
-    # Depends on LC_COLLATE set at the top of this script.
-    ! grep -rn '[^ -~]' libcxx/include/ || false
-    # Check that no dependency cycles have been introduced.
-    python3 libcxx/utils/graph_header_deps.py >/dev/null
-;;
-generic-cxx03)
-    # TODO: Switch to compiling with Clang ToT once issues with https://reviews.llvm.org/D104500 are resolved.
-    export CC=clang-12
-    export CXX=clang++-12
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx03.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-cxx11)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx11.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-cxx14)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx14.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-cxx17)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx17.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-cxx20)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx20.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-cxx2b)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx2b.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-shared.cfg.in"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-assertions)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-assertions.cmake"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-debug-iterators)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-debug-iterators.cmake"
-    check-cxx-cxxabi
-    check-abi-list
-;;
-generic-noexceptions)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-noexceptions.cmake"
-    check-cxx-cxxabi
-;;
-generic-modules)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-modules.cmake"
-    check-cxx-cxxabi
-;;
-generic-static)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-static.cmake" \
-                   -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/libcxx-trunk-static.cfg.in"
-    check-cxx-cxxabi
-;;
-generic-32bit)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-32bits.cmake"
-    check-cxx-cxxabi
-;;
-generic-clang-11)
-    export CC=clang-11
-    export CXX=clang++-11
-    clean
-    generate-cmake
-    check-cxx-cxxabi
-;;
-generic-clang-12)
-    export CC=clang-12
-    export CXX=clang++-12
-    clean
-    generate-cmake
-    check-cxx-cxxabi
-;;
-generic-gcc)
-    export CC=gcc-11
-    export CXX=g++-11
-    clean
-    generate-cmake
-    check-cxx-cxxabi
-;;
-generic-asan)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-asan.cmake"
-    check-cxx-cxxabi
-;;
-generic-msan)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-msan.cmake"
-    check-cxx-cxxabi
-;;
-generic-tsan)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-tsan.cmake"
-    check-cxx-cxxabi
-;;
-generic-ubsan)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-ubsan.cmake"
-    check-cxx-cxxabi
-;;
-generic-with_llvm_unwinder)
-    clean
-    generate-cmake -DLIBCXXABI_USE_LLVM_UNWINDER=ON
-    check-cxx-cxxabi
-;;
-generic-singlethreaded)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-singlethreaded.cmake"
-    check-cxx-cxxabi
-;;
-generic-no-debug)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-debug.cmake"
-    check-cxx-cxxabi
-;;
-generic-no-filesystem)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-filesystem.cmake"
-    check-cxx-cxxabi
-;;
-generic-no-random_device)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-random_device.cmake"
-    check-cxx-cxxabi
-;;
-generic-no-localization)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-localization.cmake"
-    check-cxx-cxxabi
-;;
-x86_64-apple-system)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Apple.cmake"
-    check-cxx-cxxabi
-;;
-x86_64-apple-system-noexceptions)
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Apple.cmake" \
-                   -DLIBCXX_ENABLE_EXCEPTIONS=OFF \
-                   -DLIBCXXABI_ENABLE_EXCEPTIONS=OFF
-    check-cxx-cxxabi
-;;
-x86_64-apple-system-backdeployment-*)
-    clean
-
-    if [[ "${OSX_ROOTS}" == "" ]]; then
-        echo "--- Downloading previous macOS dylibs"
-        PREVIOUS_DYLIBS_URL="https://dl.dropboxusercontent.com/s/liu4fmc53qzlfly/libcxx-roots.tar.gz"
-        OSX_ROOTS="${BUILD_DIR}/macos-roots"
-        mkdir -p "${OSX_ROOTS}"
-        curl "${PREVIOUS_DYLIBS_URL}" | tar -xz --strip-components=1 -C "${OSX_ROOTS}"
-    fi
-
-    DEPLOYMENT_TARGET="${BUILDER#x86_64-apple-system-backdeployment-}"
-
-    # TODO: On Apple platforms, we never produce libc++abi.1.dylib, always libc++abi.dylib.
-    #       Fix that in the build so that the tests stop searching for @rpath/libc++abi.1.dylib.
-    cp "${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}/libc++abi.dylib" \
-       "${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}/libc++abi.1.dylib"
-
-    PARAMS="target_triple=x86_64-apple-macosx${DEPLOYMENT_TARGET}"
-    PARAMS+=";cxx_runtime_root=${OSX_ROOTS}/macOS/libc++/${DEPLOYMENT_TARGET}"
-    PARAMS+=";abi_runtime_root=${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}"
-    PARAMS+=";use_system_cxx_lib=True"
-
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Apple.cmake" \
-                   -DLIBCXX_TEST_PARAMS="${PARAMS}" \
-                   -DLIBCXXABI_TEST_PARAMS="${PARAMS}"
-
-    check-cxx-cxxabi
-;;
-benchmarks)
-    clean
-    generate-cmake
-    check-cxx-benchmarks
-;;
-documentation)
-    clean
-    generate-cmake -DLLVM_ENABLE_SPHINX=ON
-
-    echo "+++ Generating documentation"
-    ${NINJA} -vC "${BUILD_DIR}" docs-libcxx-html
-;;
-unified-standalone)
-
-    clean
-
-    echo "--- Generating CMake"
-    ${CMAKE} \
-          -S "${MONOREPO_ROOT}/libcxx/utils/ci/runtimes" \
-          -B "${BUILD_DIR}" \
-          -GNinja -DCMAKE_MAKE_PROGRAM="${NINJA}" \
-          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-          -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" \
-          -DLLVM_ENABLE_PROJECTS="libcxx;libcxxabi;libunwind"
-
-    check-cxx-cxxabi
-;;
-runtimes-build)
-    clean
-
-    echo "--- Generating CMake"
-    # TODO: We currently enable modules and assertions in the runtimes build
-    #       because that provides coverage for some specific Clang failures
-    #       we've been seeing recently, however it would be better to instead
-    #       run all CI configurations against a Clang that has assertions enabled.
-    ${CMAKE} \
-          -S "${MONOREPO_ROOT}/llvm" \
-          -B "${BUILD_DIR}" \
-          -GNinja -DCMAKE_MAKE_PROGRAM="${NINJA}" \
-          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-          -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" \
-          -DLLVM_ENABLE_PROJECTS="clang" \
-          -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
-          -DLLVM_RUNTIME_TARGETS="x86_64-unknown-linux-gnu" \
-          -DLLVM_ENABLE_ASSERTIONS=ON \
-          -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-modules.cmake"
-
-    echo "+++ Running the libc++ and libc++abi tests"
-    ${NINJA} -C "${BUILD_DIR}" check-runtimes
-
-    echo "--- Installing libc++ and libc++abi to a fake location"
-    ${NINJA} -C "${BUILD_DIR}" install-runtimes
-;;
-legacy-test-config)
-    clean
-    generate-cmake -DLIBCXX_TEST_CONFIG="${MONOREPO_ROOT}/libcxx/test/configs/legacy.cfg.in"
-    check-cxx-cxxabi
-;;
-legacy-standalone)
-    clean
-
-    echo "--- Generating CMake"
-    ${CMAKE} \
-          -S "${MONOREPO_ROOT}/libcxx" \
-          -B "${BUILD_DIR}/libcxx" \
-          -GNinja -DCMAKE_MAKE_PROGRAM="${NINJA}" \
-          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-          -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" \
-          -DLLVM_PATH="${MONOREPO_ROOT}/llvm" \
-          -DLIBCXX_CXX_ABI=libcxxabi \
-          -DLIBCXX_CXX_ABI_INCLUDE_PATHS="${MONOREPO_ROOT}/libcxxabi/include" \
-          -DLIBCXX_CXX_ABI_LIBRARY_PATH="${BUILD_DIR}/libcxxabi/lib"
-
-    ${CMAKE} \
-          -S "${MONOREPO_ROOT}/libcxxabi" \
-          -B "${BUILD_DIR}/libcxxabi" \
-          -GNinja -DCMAKE_MAKE_PROGRAM="${NINJA}" \
-          -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-          -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" \
-          -DLLVM_PATH="${MONOREPO_ROOT}/llvm" \
-          -DLIBCXXABI_LIBCXX_PATH="${MONOREPO_ROOT}/libcxx" \
-          -DLIBCXXABI_LIBCXX_INCLUDES="${BUILD_DIR}/libcxx/include/c++/v1" \
-          -DLIBCXXABI_LIBCXX_LIBRARY_PATH="${BUILD_DIR}/libcxx/lib"
-
-    echo "+++ Generating libc++ headers"
-    ${NINJA} -vC "${BUILD_DIR}/libcxx" generate-cxx-headers
-
-    echo "+++ Building libc++abi"
-    ${NINJA} -vC "${BUILD_DIR}/libcxxabi" cxxabi
-
-    echo "+++ Building libc++"
-    ${NINJA} -vC "${BUILD_DIR}/libcxx" cxx
-
-    echo "+++ Running the libc++ tests"
-    ${NINJA} -vC "${BUILD_DIR}/libcxx" check-cxx
-
-    echo "+++ Running the libc++abi tests"
-    ${NINJA} -vC "${BUILD_DIR}/libcxxabi" check-cxxabi
-;;
 aarch64)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
+    whoami
+    echo $PATH
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/AArch64.cmake"
     check-cxx-cxxabi
 ;;
-aarch64-noexceptions)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/AArch64.cmake" \
-    -DLIBCXX_ENABLE_EXCEPTIONS=OFF \
-    -DLIBCXXABI_ENABLE_EXCEPTIONS=OFF
-    check-cxx-cxxabi
-;;
 # Aka Armv8 32 bit
 armv8)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
+    whoami
+    echo $PATH
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv8Arm.cmake"
     check-cxx-cxxabi
 ;;
-armv8-noexceptions)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv8Thumb-noexceptions.cmake"
-    check-cxx-cxxabi
-;;
-# Armv7 32 bit. One building Arm only one Thumb only code.
-armv7)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv7Arm.cmake"
-    check-cxx-cxxabi
-;;
-armv7-noexceptions)
-    export CC=/usr/local/bin/cc
-    export CXX=/usr/local/bin/c++
-    clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv7Thumb-noexceptions.cmake"
-    check-cxx-cxxabi
-;;
-windows-dll)
-    clean
-    # TODO: Currently, building with the experimental library breaks running
-    # tests (the test linking look for the c++experimental library with the
-    # wrong name, and the statically linked c++experimental can't be linked
-    # correctly when libc++ visibility attributes indicate dllimport linkage
-    # anyway), thus just disable the experimental library. Remove this
-    # setting when cmake and the test driver does the right thing automatically.
-    generate-cmake-libcxx-win -DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
-    echo "+++ Running the libc++ tests"
-    ${NINJA} -vC "${BUILD_DIR}" check-cxx
-;;
-windows-static)
-    clean
-    generate-cmake-libcxx-win -DLIBCXX_ENABLE_SHARED=OFF
-    echo "+++ Running the libc++ tests"
-    ${NINJA} -vC "${BUILD_DIR}" check-cxx
-;;
 #################################################################
 # Insert vendor-specific internal configurations below.
 #