[libc++] Removes Clang 13 support.

[Mordante]

Attempts to fix CI with upstream fix.

[jloser]

libcxx/test/libcxx/atomics/bit-int.verify.cpp

15–16

Can we remove the apple-clang-13 as well?

[ldionne]

libcxx/test/libcxx/atomics/bit-int.verify.cpp

15–16

apple-clang-13 is not related to clang-13 despite the resemblance! Those are different compilers, and I'll work on removing support for that one separately.

[Mordante]

Thanks for the reviews!

libcxx/test/libcxx/atomics/bit-int.verify.cpp

15–16

Thanks @ldionne! You are more familiar with apple-clang than I am.

[jloser]

libcxx/test/libcxx/atomics/bit-int.verify.cpp

15–16

Sounds good to me — thanks for the clarification.

[jloser]

LGTM — thanks!

libcxx/docs/index.rst

 
 Libc++ aims to support common compilers that implement the C++11 Standard. In order to strike a
 good balance between stability for users and maintenance cost, testing coverage and development
 velocity, libc++ drops support for older compilers as newer ones are released.
 
 ============ =============== ========================== =====================
 Compiler     Versions        Restrictions               Support policy
 ============ =============== ========================== =====================
-Clang        13, 14                                     latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_
+Clang        14, 15                                     latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_
 AppleClang   13                                         latest stable release per `Xcode's release page <https://developer.apple.com/documentation/xcode-release-notes>`_
 Open XL      17.1 (AIX)                                 latest stable release per `Open XL's documentation page <https://www.ibm.com/docs/en/openxl-c-and-cpp-aix>`_
 GCC          12              In C++11 or later only     latest stable release per `GCC's release page <https://gcc.gnu.org/releases.html>`_
 ============ =============== ========================== =====================
 
 Libc++ also supports common platforms and architectures:
 
 =============== ========================= ============================

libcxx/test/libcxx/atomics/bit-int.verify.cpp

 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 // <atomic>
 
 // Make sure that `std::atomic` doesn't work with `_BitInt`. The intent is to
 // disable them for now until their behavior can be designed better later.
 // See https://reviews.llvm.org/D84049 for details.
 
 // UNSUPPORTED: apple-clang-13, apple-clang-14
-// UNSUPPORTED: clang-13
 
 // UNSUPPORTED: c++03
 
 #include <atomic>
 
 int main(int, char**)
 {
   // expected-error@atomic:*1 {{_Atomic cannot be applied to integer type '_BitInt(32)'}}
   std::atomic<_BitInt(32)> x(42);
 
   return 0;
 }

libcxx/test/libcxx/experimental/fexperimental-library.compile.pass.cpp

 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 // This test ensures that passing `-fexperimental-library` results in experimental
 // library features being enabled.
 
 // GCC does not support the -fexperimental-library flag
 // UNSUPPORTED: gcc
 
 // Clang does not support the -fexperimental-library flag before LLVM 15.0
-// UNSUPPORTED: clang-13, clang-14
+// UNSUPPORTED: clang-14
 
 // AppleClang does not support the -fexperimental-library flag yet
 // UNSUPPORTED: apple-clang-13, apple-clang-14.0
 
 // Clang on AIX currently pretends that it is Clang 15, even though it is not (as of writing
 // this, LLVM 15 hasn't even been branched yet).
 // UNSUPPORTED: clang-15 && buildhost=aix
 
 // ADDITIONAL_COMPILE_FLAGS: -fexperimental-library
 
 #include <version>
 
 #ifdef _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
 #   error "-fexperimental-library should enable <format>"
 #endif

libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp

 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 // REQUIRES: host-has-gdb-with-python
 // REQUIRES: locale.en_US.UTF-8
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: c++03
 
 // TODO: Investigate this failure, which happens only with the Bootstrapping build.
-// UNSUPPORTED: clang-13, clang-14, clang-15, clang-16
+// UNSUPPORTED: clang-14, clang-15, clang-16
 
 // TODO: Investigate this failure on GCC 12 (in Ubuntu Jammy)
 // UNSUPPORTED: gcc-12
 
 // RUN: %{cxx} %{flags} %s -o %t.exe %{compile_flags} -g %{link_flags}
 // Ensure locale-independence for unicode tests.
 // RUN: env LANG=en_US.UTF-8 %{gdb} -nx -batch -iex "set autoload off" -ex "source %S/../../../utils/gdb/libcxx/printers.py" -ex "python register_libcxx_printer_loader()" -ex "source %S/gdb_pretty_printer_test.py" %t.exe
 

libcxx/test/std/utilities/tuple/tuple.tuple/tuple.assign/convert_copy.pass.cpp

 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 // Triggers a Clang assertion: llvm.org/PR45879
-// UNSUPPORTED: clang-13, clang-14, clang-15
+// UNSUPPORTED: clang-14, clang-15
 
 // <tuple>
 
 // template <class... Types> class tuple;
 
 // template <class... UTypes>
 //   tuple& operator=(const tuple<UTypes...>& u);
 

libcxx/utils/ci/buildkite-pipeline.yml

agents:
       queue: "libcxx-builders"
       os: "linux"
     retry:
       automatic:
         - exit_status: -1  # Agent was lost
           limit: 2
     timeout_in_minutes: 120
 
-  - label: "Clang 13"
-    command: "libcxx/utils/ci/run-buildbot generic-cxx2b"
-    artifact_paths:
-      - "**/test-results.xml"
-      - "**/*.abilist"
-    env:
-        CC: "clang-13"
-        CXX: "clang++-13"
-    agents:
-      queue: "libcxx-builders"
-      os: "linux"
-    retry:
-      automatic:
-        - exit_status: -1  # Agent was lost
-          limit: 2
-    timeout_in_minutes: 120
-
   - label: "Clang 14"
     command: "libcxx/utils/ci/run-buildbot generic-cxx2b"
     artifact_paths:
       - "**/test-results.xml"
       - "**/*.abilist"
     env:
         CC: "clang-14"
         CXX: "clang++-14"