[libc++][CI] Updates GCC to version 12.

Reviewed By: ldionne, philnik, #libc, #libc_abi

Differential Revision: https://reviews.llvm.org/D126667

29 files changed, 42 insertions, 61 deletions

diff --git a/libcxx/docs/index.rst b/libcxx/docs/index.rst
index b953e904..71674e7 100644
--- a/libcxx/docs/index.rst
+++ b/libcxx/docs/index.rst
@@ -107,7 +107,7 @@ Compiler     Versions        Restrictions               Support policy
 Clang        13, 14                                     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          11              In C++11 or later only     latest stable release per `GCC's release page <https://gcc.gnu.org/releases.html>`_
+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:
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 1395e62..09a5dcf 100644
--- a/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
+++ b/libcxx/test/libcxx/gdb/gdb_pretty_printer_test.sh.cpp
@@ -14,8 +14,8 @@
 // TODO: Investigate this failure, which happens only with the Bootstrapping build.
 // UNSUPPORTED: clang-13, clang-14, clang-15
 
-// TODO: Investigate this failure on GCC 11.2 (in Ubuntu Jammy)
-// UNSUPPORTED: gcc-11.2
+// 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.
diff --git a/libcxx/test/std/ranges/range.factories/range.single.view/assign.pass.cpp b/libcxx/test/std/ranges/range.factories/range.single.view/assign.pass.cpp
index def414e..349c4fb 100644
--- a/libcxx/test/std/ranges/range.factories/range.single.view/assign.pass.cpp
+++ b/libcxx/test/std/ranges/range.factories/range.single.view/assign.pass.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: gcc-11
 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // Tests that <value_> is a <copyable-box>.
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.bool.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.bool.pass.cpp
index 75a83a0..bd48281 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.bool.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.bool.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.c_string.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.c_string.pass.cpp
index 2936713..21b906e 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.c_string.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.c_string.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
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 b8ac0cf..15c36bd 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
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT __builtin_memcpy isn't constexpr in GCC
+// UNSUPPORTED: gcc-12
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.const_char_array.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.const_char_array.pass.cpp
index ef08fde..24db819 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.const_char_array.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.const_char_array.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.floating_point.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.floating_point.pass.cpp
index 38e891a..25e26f9 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.floating_point.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.floating_point.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.handle.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.handle.pass.cpp
index 75b68dc..4f3c94e 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.handle.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.handle.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.pointer.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.pointer.pass.cpp
index 470f2c5..ef3a1fd 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.pointer.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.pointer.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.string.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.string.pass.cpp
index 41f99ea..1c43224 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.string.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.formatter.spec/formatter.string.pass.cpp
@@ -7,8 +7,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format.locale.pass.cpp
index f377096..aa8cc48 100644
--- a/libcxx/test/std/utilities/format/format.functions/format.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED:gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format.pass.cpp
index 77e086f..82c170c 100644
--- a/libcxx/test/std/utilities/format/format.functions/format.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format_to.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format_to.locale.pass.cpp
index 3f435cb..822f409 100644
--- a/libcxx/test/std/utilities/format/format.functions/format_to.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format_to.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format_to.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format_to.pass.cpp
index 3aaf287..80f4741 100644
--- a/libcxx/test/std/utilities/format/format.functions/format_to.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format_to.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format_to_n.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format_to_n.locale.pass.cpp
index f3ae11b..53e7d1b 100644
--- a/libcxx/test/std/utilities/format/format.functions/format_to_n.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format_to_n.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/format_to_n.pass.cpp b/libcxx/test/std/utilities/format/format.functions/format_to_n.pass.cpp
index 24d2466..c74b376 100644
--- a/libcxx/test/std/utilities/format/format.functions/format_to_n.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/format_to_n.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/formatted_size.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/formatted_size.locale.pass.cpp
index 094d101..f6602ea 100644
--- a/libcxx/test/std/utilities/format/format.functions/formatted_size.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/formatted_size.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/formatted_size.pass.cpp b/libcxx/test/std/utilities/format/format.functions/formatted_size.pass.cpp
index 250f24e..f8c2c08 100644
--- a/libcxx/test/std/utilities/format/format.functions/formatted_size.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/formatted_size.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/locale-specific_form.pass.cpp b/libcxx/test/std/utilities/format/format.functions/locale-specific_form.pass.cpp
index 6a6846b..630c404 100644
--- a/libcxx/test/std/utilities/format/format.functions/locale-specific_form.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/locale-specific_form.pass.cpp
@@ -9,8 +9,8 @@
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
 
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 
 // REQUIRES: locale.en_US.UTF-8
 
diff --git a/libcxx/test/std/utilities/format/format.functions/vformat.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/vformat.locale.pass.cpp
index 092773e..069a96b 100644
--- a/libcxx/test/std/utilities/format/format.functions/vformat.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/vformat.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/vformat.pass.cpp b/libcxx/test/std/utilities/format/format.functions/vformat.pass.cpp
index 31e2fae..de0110b 100644
--- a/libcxx/test/std/utilities/format/format.functions/vformat.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/vformat.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/vformat_to.locale.pass.cpp b/libcxx/test/std/utilities/format/format.functions/vformat_to.locale.pass.cpp
index fe41ad0..c4a4680 100644
--- a/libcxx/test/std/utilities/format/format.functions/vformat_to.locale.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/vformat_to.locale.pass.cpp
@@ -8,8 +8,8 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: no-localization
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp b/libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp
index 2ebed63..c4fee6b 100644
--- a/libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp
@@ -7,8 +7,8 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-has-no-incomplete-format
-// TODO FMT Evaluate gcc-11 status
-// UNSUPPORTED: gcc-11
+// TODO FMT Evaluate gcc-12 status
+// UNSUPPORTED: gcc-12
 // TODO FMT Investigate AppleClang ICE
 // UNSUPPORTED: apple-clang-13
 
diff --git a/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique.sizezero.pass.cpp b/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique.sizezero.pass.cpp
index b5df01b..85ad531 100644
--- a/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique.sizezero.pass.cpp
+++ b/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.create/make_unique.sizezero.pass.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 // This code triggers https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104568
-// UNSUPPORTED: gcc-11
 // UNSUPPORTED: msvc
 
 // Test the fix for https://llvm.org/PR54100
diff --git a/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/deduct.pass.cpp b/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/deduct.pass.cpp
index 993a1ea..c3e684b 100644
--- a/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/deduct.pass.cpp
+++ b/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/deduct.pass.cpp
@@ -8,11 +8,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14
 
-// GCC's implementation of class template deduction is still immature and runs
-// into issues with libc++. However GCC accepts this code when compiling
-// against libstdc++.
-// XFAIL: gcc-11
-
 // <tuple>
 
 // Test that the constructors offered by std::tuple are formulated
diff --git a/libcxx/test/std/utilities/utility/pairs/pairs.pair/implicit_deduction_guides.pass.cpp b/libcxx/test/std/utilities/utility/pairs/pairs.pair/implicit_deduction_guides.pass.cpp
index 3c0a7f1..0b0f8bea 100644
--- a/libcxx/test/std/utilities/utility/pairs/pairs.pair/implicit_deduction_guides.pass.cpp
+++ b/libcxx/test/std/utilities/utility/pairs/pairs.pair/implicit_deduction_guides.pass.cpp
@@ -8,11 +8,6 @@
 
 // UNSUPPORTED: c++03, c++11, c++14
 
-// GCC's implementation of class template deduction is still immature and runs
-// into issues with libc++. However GCC accepts this code when compiling
-// against libstdc++.
-// XFAIL: gcc
-
 // <utility>
 
 // Test that the constructors offered by std::pair are formulated
diff --git a/libcxx/utils/ci/run-buildbot b/libcxx/utils/ci/run-buildbot
index 23aaa1c..81f7d6c 100755
--- a/libcxx/utils/ci/run-buildbot
+++ b/libcxx/utils/ci/run-buildbot
@@ -281,8 +281,8 @@ generic-clang-14)
     check-abi-list
 ;;
 generic-gcc)
-    export CC=gcc-11
-    export CXX=g++-11
+    export CC=gcc-12
+    export CXX=g++-12
     clean
     generate-cmake -DLIBCXX_ENABLE_WERROR=NO \
                    -DLIBCXXABI_ENABLE_WERROR=NO \
@@ -290,8 +290,8 @@ generic-gcc)
     check-runtimes
 ;;
 generic-gcc-cxx11)
-    export CC=gcc-11
-    export CXX=g++-11
+    export CC=gcc-12
+    export CXX=g++-12
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx11.cmake" \
                    -DLIBCXX_ENABLE_WERROR=NO \
diff --git a/libcxx/utils/libcxx/test/params.py b/libcxx/utils/libcxx/test/params.py
index 2f537f1..82fe93f 100644
--- a/libcxx/utils/libcxx/test/params.py
+++ b/libcxx/utils/libcxx/test/params.py
@@ -33,6 +33,11 @@ _warningFlags = [
   '-Wno-literal-suffix', # GCC
   '-Wno-user-defined-literals', # Clang
 
+  # GCC warns about this when TEST_IS_CONSTANT_EVALUATED is used on a non-constexpr
+  # function. (This mostely happens in C++11 mode.)
+  # TODO(mordante) investigate a solution for this issue.
+  '-Wno-tautological-compare',
+
   # These warnings should be enabled in order to support the MSVC
   # team using the test suite; They enable the warnings below and
   # expect the test suite to be clean.