[libc++] Remove annotations for GCC 13 and update the documentation (#97744)

GCC 14 has been released a while ago. We've updated the CI to use GCC 14
now. This removes any old annotations in the tests and updates the
documentation to reflect the updated version requirements.

11 files changed, 13 insertions, 21 deletions

diff --git a/libcxx/docs/index.rst b/libcxx/docs/index.rst
index 743f992..69a9e57 100644
--- a/libcxx/docs/index.rst
+++ b/libcxx/docs/index.rst
@@ -71,7 +71,7 @@ iOS, watchOS, and tvOS, Google Search, the Android operating system, and FreeBSD
 user base of over 1 billion daily active users.
 
 Since its inception, libc++ has focused on delivering high performance, standards-conformance, and portability. It has
-been extensively tested and optimized, making it robust and production ready. libc++ fully implements C++11 and C++14, 
+been extensively tested and optimized, making it robust and production ready. libc++ fully implements C++11 and C++14,
 with C++17, C++20, C++23, and C++26 features being actively developed and making steady progress.
 
 libc++ is continuously integrated and tested on a wide range of platforms and configurations, ensuring its reliability
@@ -137,7 +137,7 @@ Compiler     Versions        Restrictions               Support policy
 Clang        17, 18, 19-git                             latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_ and the development version
 AppleClang   15                                         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          13              In C++11 or later only     latest stable release per `GCC's release page <https://gcc.gnu.org/releases.html>`_
+GCC          14              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:
diff --git a/libcxx/include/__configuration/compiler.h b/libcxx/include/__configuration/compiler.h
index a9fc349..80ece22 100644
--- a/libcxx/include/__configuration/compiler.h
+++ b/libcxx/include/__configuration/compiler.h
@@ -41,8 +41,8 @@
 #      warning "Libc++ only supports AppleClang 15 and later"
 #    endif
 #  elif defined(_LIBCPP_GCC_VER)
-#    if _LIBCPP_GCC_VER < 1300
-#      warning "Libc++ only supports GCC 13 and later"
+#    if _LIBCPP_GCC_VER < 1400
+#      warning "Libc++ only supports GCC 14 and later"
 #    endif
 #  endif
 
diff --git a/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp b/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
index e6adda3..4c2b483 100644
--- a/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
+++ b/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
@@ -14,9 +14,6 @@
 // TODO: Investigate these failures which break the CI.
 // UNSUPPORTED: clang-17, clang-18, clang-19
 
-// TODO: Investigate this failure on GCC 13 (in Ubuntu Jammy)
-// UNSUPPORTED: gcc-13
-
 // The Android libc++ tests are run on a non-Android host, connected to an
 // Android device over adb. gdb needs special support to make this work (e.g.
 // gdbclient.py, ndk-gdb.py, gdbserver), and the Android organization doesn't
diff --git a/libcxx/test/std/algorithms/robust_against_adl.compile.pass.cpp b/libcxx/test/std/algorithms/robust_against_adl.compile.pass.cpp
index 6e6cddf..2d5ece6 100644
--- a/libcxx/test/std/algorithms/robust_against_adl.compile.pass.cpp
+++ b/libcxx/test/std/algorithms/robust_against_adl.compile.pass.cpp
@@ -8,11 +8,6 @@
 
 // <algorithm>
 
-// https://buildkite.com/llvm-project/libcxx-ci/builds/15823#0184fc0b-d56b-4774-9e1d-35fe24e09e37
-// It seems like the CI gcc version is buggy. I can't reproduce the failure on my system or on
-// godbolt (https://godbolt.org/z/rsPv8e8fn).
-// UNSUPPORTED: gcc-13
-
 #include <algorithm>
 #include <cstddef>
 #include <functional>
diff --git a/libcxx/test/std/containers/views/mdspan/mdspan/index_operator.pass.cpp b/libcxx/test/std/containers/views/mdspan/mdspan/index_operator.pass.cpp
index 2b843d6..ffb10c0 100644
--- a/libcxx/test/std/containers/views/mdspan/mdspan/index_operator.pass.cpp
+++ b/libcxx/test/std/containers/views/mdspan/mdspan/index_operator.pass.cpp
@@ -122,8 +122,8 @@ constexpr void test_layout() {
   test_iteration(construct_mapping(Layout(), std::extents<unsigned, 7, 8>()));
   test_iteration(construct_mapping(Layout(), std::extents<signed char, D, D, D, D>(1, 1, 1, 1)));
 
-// TODO enable for GCC 13, when the CI pipeline is switched, doesn't work with GCC 12
-#if defined(__clang_major__) && __clang_major__ >= 17
+// TODO(LLVM 20): Enable this once AppleClang is upgraded
+#ifndef TEST_COMPILER_APPLE_CLANG
   int data[1];
   // Check operator constraint for number of arguments
   static_assert(check_operator_constraints(std::mdspan(data, construct_mapping(Layout(), std::extents<int, D>(1))), 0));
@@ -216,7 +216,7 @@ constexpr void test_layout() {
       assert(!check_operator_constraints(std::mdspan(data, construct_mapping(Layout(), std::extents<int, D>(1))), s));
     }
   }
-#endif
+#endif // TEST_COMPILER_APPLE_CLANG
 }
 
 template <class Layout>
diff --git a/libcxx/test/std/time/time.zone/time.zone.leap/nonmembers/comparison.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.leap/nonmembers/comparison.pass.cpp
index ccff024..d487453 100644
--- a/libcxx/test/std/time/time.zone/time.zone.leap/nonmembers/comparison.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.leap/nonmembers/comparison.pass.cpp
@@ -10,7 +10,7 @@
 // UNSUPPORTED: no-filesystem, no-localization, no-tzdb
 
 // TODO TZDB investigate why this fails with GCC
-// UNSUPPORTED: gcc-13, gcc-14
+// UNSUPPORTED: gcc-14
 
 // XFAIL: libcpp-has-no-experimental-tzdb
 // XFAIL: availability-tzdb-missing
diff --git a/libcxx/test/std/utilities/expected/expected.expected/monadic/transform.pass.cpp b/libcxx/test/std/utilities/expected/expected.expected/monadic/transform.pass.cpp
index aa7106f..4fb2137 100644
--- a/libcxx/test/std/utilities/expected/expected.expected/monadic/transform.pass.cpp
+++ b/libcxx/test/std/utilities/expected/expected.expected/monadic/transform.pass.cpp
@@ -10,7 +10,7 @@
 
 // GCC has a issue for `Guaranteed copy elision for potentially-overlapping non-static data members`,
 // please refer to: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108333
-// XFAIL: gcc-13, gcc-14
+// XFAIL: gcc-14
 
 // <expected>
 
diff --git a/libcxx/test/std/utilities/expected/expected.expected/monadic/transform_error.pass.cpp b/libcxx/test/std/utilities/expected/expected.expected/monadic/transform_error.pass.cpp
index ae9fecc..d35788d 100644
--- a/libcxx/test/std/utilities/expected/expected.expected/monadic/transform_error.pass.cpp
+++ b/libcxx/test/std/utilities/expected/expected.expected/monadic/transform_error.pass.cpp
@@ -10,7 +10,7 @@
 
 // GCC has a issue for `Guaranteed copy elision for potentially-overlapping non-static data members`,
 // please refer to: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108333.
-// XFAIL: gcc-13, gcc-14
+// XFAIL: gcc-14
 
 // <expected>
 
diff --git a/libcxx/test/std/utilities/expected/expected.void/monadic/transform_error.pass.cpp b/libcxx/test/std/utilities/expected/expected.void/monadic/transform_error.pass.cpp
index f70bddb..f6d3011 100644
--- a/libcxx/test/std/utilities/expected/expected.void/monadic/transform_error.pass.cpp
+++ b/libcxx/test/std/utilities/expected/expected.void/monadic/transform_error.pass.cpp
@@ -10,7 +10,7 @@
 
 // GCC has a issue for `Guaranteed copy elision for potentially-overlapping non-static data members`,
 // please refer to: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108333
-// XFAIL: gcc-13, gcc-14
+// XFAIL: gcc-14
 
 // <expected>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.char_array.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.char_array.pass.cpp
index cad13c1..23dcc0b 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.char_array.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.char_array.pass.cpp
@@ -7,7 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // TODO FMT __builtin_memcpy isn't constexpr in GCC
-// UNSUPPORTED: gcc-13, gcc-14
+// UNSUPPORTED: gcc-14
 
 // <format>
 
diff --git a/libcxxabi/test/catch_member_function_pointer_02.pass.cpp b/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
index 112e787..5d70203 100644
--- a/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
+++ b/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
@@ -12,7 +12,7 @@
 
 // GCC supports noexcept function types but this test still fails.
 // This is likely a bug in their implementation. Investigation needed.
-// XFAIL: gcc-13, gcc-14
+// XFAIL: gcc-14
 
 #include <cassert>