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

Fri Jul 25 06:48:50 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-with-thin-lto-ubuntu` running on `as-worker-92` while building `llvm` at step 6 "build-stage1-compiler".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/127/builds/4191

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

```
Step 6 (build-stage1-compiler) failure: build (failure)
...
946.263 [249/72/6314] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Base64Test.cpp.o
946.321 [248/72/6315] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DebugTest.cpp.o
946.380 [247/72/6316] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CRCTest.cpp.o
946.441 [246/72/6317] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DebugCounterTest.cpp.o
946.451 [245/72/6318] Linking CXX executable unittests/MC/AMDGPU/AMDGPUMCTests
946.830 [244/72/6319] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/IntrinsicInstTest.cpp.o
947.104 [243/72/6320] Linking CXX executable unittests/ObjectYAML/ObjectYAMLTests
947.145 [242/72/6321] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/DXContainerTest.cpp.o
947.216 [241/72/6322] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/AddressRangeTest.cpp.o
947.263 [240/72/6323] 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-92/clang-with-thin-lto-ubuntu/build/stage1/unittests/Support -I/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/llvm-project/llvm/unittests/Support -I/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/build/stage1/include -I/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/llvm-project/llvm/include -I/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/llvm-project/third-party/unittest/googletest/include -I/home/buildbot/as-worker-92/clang-with-thin-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-92/clang-with-thin-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp
/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp: In member function ‘virtual void DebugLogTest_Basic_Test::TestBody()’:
/home/buildbot/as-worker-92/clang-with-thin-lto-ubuntu/llvm-project/llvm/unittests/Support/DebugLogTest.cpp:69:22: error: zero-size array ‘DT’
   69 |   static const char *DT[] = {};
      |                      ^~
947.360 [240/71/6324] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/OperatorTest.cpp.o
947.450 [240/70/6325] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Caching.cpp.o
947.668 [240/69/6326] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CSKYAttributeParserTest.cpp.o
947.752 [240/68/6327] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DJBTest.cpp.o
947.782 [240/67/6328] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Chrono.cpp.o
947.831 [240/66/6329] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/PassManagerTest.cpp.o
947.958 [240/65/6330] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/PGOCtxProfReaderWriterTest.cpp.o
947.978 [240/64/6331] Building CXX object unittests/Passes/Plugins/DoublerPlugin/CMakeFiles/DoublerPlugin.dir/DoublerPlugin.cpp.o
948.128 [240/63/6332] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/Casting.cpp.o
948.133 [240/62/6333] Building CXX object unittests/Passes/Plugins/TestPlugin/CMakeFiles/TestPlugin.dir/TestPlugin.cpp.o
948.231 [240/61/6334] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DivisionByConstantTest.cpp.o
948.232 [240/60/6335] Building CXX object unittests/MI/CMakeFiles/MITests.dir/LiveIntervalTest.cpp.o
948.257 [240/59/6336] Building CXX object unittests/Option/CMakeFiles/OptionTests.dir/OptionParsingTest.cpp.o
948.264 [240/58/6337] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ErrnoTest.cpp.o
948.444 [240/57/6338] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/VFABIDemanglerTest.cpp.o
948.648 [240/56/6339] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ELFAttributeParserTest.cpp.o
948.674 [240/55/6340] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/FSUniqueIDTest.cpp.o
948.691 [240/54/6341] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/TypesTest.cpp.o
948.783 [240/53/6342] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ErrorOrTest.cpp.o
948.821 [240/52/6343] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/EndianStreamTest.cpp.o
948.852 [240/51/6344] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/EndianTest.cpp.o
948.997 [240/50/6345] Linking CXX executable unittests/CodeGen/CodeGenTests
949.021 [240/49/6346] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ExtensibleRTTITest.cpp.o
949.085 [240/48/6347] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/GenericDomTreeTest.cpp.o
949.156 [240/47/6348] Building CXX object unittests/MIR/CMakeFiles/MIRTests.dir/MachineMetadata.cpp.o
949.229 [240/46/6349] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ExponentialBackoffTest.cpp.o
949.382 [240/45/6350] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/IndexedAccessorTest.cpp.o
949.724 [240/44/6351] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/BalancedPartitioningTest.cpp.o
949.801 [240/43/6352] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/InstructionsTest.cpp.o
949.938 [240/42/6353] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/InterleavedRangeTest.cpp.o
949.982 [240/41/6354] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/InstructionCostTest.cpp.o
950.114 [240/40/6355] Building CXX object unittests/ExecutionEngine/Orc/CMakeFiles/OrcJITTests.dir/CoreAPIsTest.cpp.o
950.286 [240/39/6356] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/MD5Test.cpp.o

```

</details>

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