[llvm] [YAML] Make `std::array` available (PR #116059)

Wed Nov 13 18:37:02 PST 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/8407

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
283.077 [45/34/1196] Linking CXX executable unittests/Transforms/Coroutines/CoroTests
283.140 [44/34/1197] Linking CXX executable unittests/Transforms/Instrumentation/InstrumentationTests
283.776 [43/34/1198] Linking CXX executable unittests/Target/X86/X86Tests
283.815 [42/34/1199] Linking CXX executable unittests/Transforms/Utils/UtilsTests
283.984 [41/34/1200] Linking CXX executable unittests/Target/TargetMachineCTests
284.143 [40/34/1201] Linking CXX executable unittests/tools/llvm-cfi-verify/CFIVerifyTests
284.294 [39/34/1202] Building CXX object unittests/DebugInfo/BTF/CMakeFiles/DebugInfoBTFTests.dir/BTFParserTest.cpp.o
284.521 [38/34/1203] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/DXContainerTest.cpp.o
284.613 [37/34/1204] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
284.678 [36/34/1205] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/YAMLIOTest.cpp.o
FAILED: unittests/Support/CMakeFiles/SupportTests.dir/YAMLIOTest.cpp.o 
/opt/ccache/bin/g++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/unittests/Support -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/unittests/Support -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/third-party/unittest/googletest/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wno-dangling-else -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -std=c++17 -MD -MT unittests/Support/CMakeFiles/SupportTests.dir/YAMLIOTest.cpp.o -MF unittests/Support/CMakeFiles/SupportTests.dir/YAMLIOTest.cpp.o.d -o unittests/Support/CMakeFiles/SupportTests.dir/YAMLIOTest.cpp.o -c /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/unittests/Support/YAMLIOTest.cpp
In file included from /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/unittests/Support/YAMLIOTest.cpp:17:
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include/llvm/Support/YAMLTraits.h: In instantiation of ‘std::enable_if_t<llvm::yaml::missingTraits<T, llvm::yaml::EmptyContext>::value, void> llvm::yaml::yamlize(llvm::yaml::IO&, T&, bool, llvm::yaml::EmptyContext&) [with T = std::array<int, 4>; std::enable_if_t<llvm::yaml::missingTraits<T, llvm::yaml::EmptyContext>::value, void> = void]’:
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:960:14:   required from ‘void llvm::yaml::IO::processKey(const char*, T&, bool, Context&) [with T = std::array<int, 4>; Context = llvm::yaml::EmptyContext]’
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:882:5:   required from ‘void llvm::yaml::IO::mapRequired(const char*, T&) [with T = std::array<int, 4>]’
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/unittests/Support/YAMLIOTest.cpp:3388:39:   required from here
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:1172:36: error: invalid application of ‘sizeof’ to incomplete type ‘llvm::yaml::MissingTrait<std::array<int, 4> >’
 1172 |   char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~
284.865 [36/33/1206] Linking CXX executable unittests/DebugInfo/BTF/DebugInfoBTFTests
285.010 [36/32/1207] Building CXX object unittests/ObjectYAML/CMakeFiles/ObjectYAMLTests.dir/DWARFYAMLTest.cpp.o
285.174 [36/31/1208] Building CXX object unittests/ObjectYAML/CMakeFiles/ObjectYAMLTests.dir/MinidumpYAMLTest.cpp.o
285.721 [36/30/1209] Building CXX object unittests/ObjectYAML/CMakeFiles/ObjectYAMLTests.dir/DXContainerYAMLTest.cpp.o
285.979 [36/29/1210] Building CXX object unittests/ObjectYAML/CMakeFiles/ObjectYAMLTests.dir/ELFYAMLTest.cpp.o
286.070 [36/28/1211] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/macho2yaml.cpp.o
286.697 [36/27/1212] Building CXX object tools/clang/unittests/Format/CMakeFiles/FormatTests.dir/FormatTest.cpp.o
287.818 [36/26/1213] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/ResultAggregatorTest.cpp.o
288.132 [36/25/1214] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/X86/SubprocessMemoryTest.cpp.o
288.368 [36/24/1215] Building CXX object tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o
289.778 [36/23/1216] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/ClusteringTest.cpp.o
289.783 [36/22/1217] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/ELFObjectFileTest.cpp.o
290.371 [36/21/1218] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o
290.874 [36/20/1219] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/CoverageMappingTest.cpp.o
290.890 [36/19/1220] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/PowerPC/AnalysisTest.cpp.o
291.141 [36/18/1221] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/X86/SchedClassResolutionTest.cpp.o
291.872 [36/17/1222] Building CXX object unittests/Target/ARM/CMakeFiles/ARMTests.dir/MachineInstrTest.cpp.o
292.310 [36/16/1223] Building CXX object tools/clang/unittests/Tooling/CMakeFiles/ToolingTests.dir/RefactoringTest.cpp.o
292.758 [36/15/1224] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/MemProfTest.cpp.o
293.931 [36/14/1225] Building CXX object unittests/Target/ARM/CMakeFiles/ARMTests.dir/InstSizes.cpp.o
294.156 [36/13/1226] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/Mips/BenchmarkResultTest.cpp.o
294.283 [36/12/1227] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/elf2yaml.cpp.o
294.422 [36/11/1228] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/BenchmarkRunnerTest.cpp.o
294.860 [36/10/1229] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/X86/BenchmarkResultTest.cpp.o
295.731 [36/9/1230] Building CXX object tools/clang/unittests/Format/CMakeFiles/FormatTests.dir/TokenAnnotatorTest.cpp.o
296.252 [36/8/1231] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/PowerPC/TargetTest.cpp.o
296.447 [36/7/1232] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/AArch64/TargetTest.cpp.o
297.476 [36/6/1233] Building CXX object unittests/tools/llvm-exegesis/CMakeFiles/LLVMExegesisTests.dir/PowerPC/SnippetGeneratorTest.cpp.o
298.823 [36/5/1234] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/InstrProfTest.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/116059