[llvm] [llvm][support] Add LDBG macro. (PR #143704)

Mon Jul 28 20:09:28 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-with-lto-ubuntu` running on `as-worker-91` while building `llvm` at step 6 "build-stage1-compiler".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/49/builds/1938

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

```
Step 6 (build-stage1-compiler) failure: build (failure)
...
970.234 [251/72/6312] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DebugTest.cpp.o
970.252 [250/72/6313] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/XCOFFObjectFileTest.cpp.o
970.347 [249/72/6314] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CheckedArithmeticTest.cpp.o
970.360 [248/72/6315] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/IntrinsicInstTest.cpp.o
970.419 [247/72/6316] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/ValueMapTest.cpp.o
970.563 [246/72/6317] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/DXContainerTest.cpp.o
970.567 [245/72/6318] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CRCTest.cpp.o
970.758 [244/72/6319] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/BranchProbabilityTest.cpp.o
970.828 [243/72/6320] Building CXX object unittests/MI/CMakeFiles/MITests.dir/LiveIntervalTest.cpp.o
971.247 [242/72/6321] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DebugLogTest.cpp.o
FAILED: unittests/Support/CMakeFiles/SupportTests.dir/DebugLogTest.cpp.o 
/usr/bin/c++ -DEXPERIMENTAL_KEY_INSTRUCTIONS -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/build/stage1/unittests/Support -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/unittests/Support -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/build/stage1/include -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/include -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/third-party/unittest/googletest/include -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -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 -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wno-dangling-else -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -Wno-suggest-override -std=c++17 -MD -MT unittests/Support/CMakeFiles/SupportTests.dir/DebugLogTest.cpp.o -MF unittests/Support/CMakeFiles/SupportTests.dir/DebugLogTest.cpp.o.d -o unittests/Support/CMakeFiles/SupportTests.dir/DebugLogTest.cpp.o -c /home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp
/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp: In member function ‘virtual void DebugLogTest_Basic_Test::TestBody()’:
/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp:69:22: error: zero-size array ‘DT’
   69 |   static const char *DT[] = {};
      |                      ^~
971.249 [242/71/6322] Linking CXX executable unittests/ObjectYAML/ObjectYAMLTests
971.405 [242/70/6323] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DJBTest.cpp.o
971.641 [242/69/6324] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/PGOCtxProfReaderWriterTest.cpp.o
971.651 [242/68/6325] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/AddressRangeTest.cpp.o
971.677 [242/67/6326] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CSKYAttributeParserTest.cpp.o
971.751 [242/66/6327] Building CXX object unittests/Passes/Plugins/TestPlugin/CMakeFiles/TestPlugin.dir/TestPlugin.cpp.o
971.758 [242/65/6328] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Casting.cpp.o
971.793 [242/64/6329] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ErrnoTest.cpp.o
971.794 [242/63/6330] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DivisionByConstantTest.cpp.o
971.904 [242/62/6331] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Chrono.cpp.o
972.068 [242/61/6332] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Caching.cpp.o
972.129 [242/60/6333] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/OperatorTest.cpp.o
972.225 [242/59/6334] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ELFAttributeParserTest.cpp.o
972.279 [242/58/6335] Building CXX object unittests/ExecutionEngine/Orc/CMakeFiles/OrcJITTests.dir/CoreAPIsTest.cpp.o
972.301 [242/57/6336] Building CXX object unittests/Passes/Plugins/DoublerPlugin/CMakeFiles/DoublerPlugin.dir/DoublerPlugin.cpp.o
972.538 [242/56/6337] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/EndianStreamTest.cpp.o
972.639 [242/55/6338] Building CXX object unittests/Option/CMakeFiles/OptionTests.dir/OptionParsingTest.cpp.o
972.711 [242/54/6339] Building CXX object unittests/MIR/CMakeFiles/MIRTests.dir/MachineMetadata.cpp.o
972.730 [242/53/6340] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/PassManagerTest.cpp.o
972.785 [242/52/6341] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/TypesTest.cpp.o
972.798 [242/51/6342] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/VFABIDemanglerTest.cpp.o
972.818 [242/50/6343] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ErrorOrTest.cpp.o
972.859 [242/49/6344] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ExtensibleRTTITest.cpp.o
972.902 [242/48/6345] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/GenericDomTreeTest.cpp.o
972.967 [242/47/6346] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/FSUniqueIDTest.cpp.o
973.071 [242/46/6347] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ExponentialBackoffTest.cpp.o
973.187 [242/45/6348] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/EndianTest.cpp.o
973.373 [242/44/6349] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/BalancedPartitioningTest.cpp.o
973.438 [242/43/6350] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/FileOutputBufferTest.cpp.o
973.833 [242/42/6351] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/IndexedAccessorTest.cpp.o
973.966 [242/41/6352] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/InterleavedRangeTest.cpp.o
974.057 [242/40/6353] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/LineIteratorTest.cpp.o
974.342 [242/39/6354] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/InstructionCostTest.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/143704