[clang] opencl: Ensure printf symbol is not mangled. (PR #150210)

Mon Jul 28 07:32:54 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-5` while building `clang` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/24352

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
84.959 [233/8/5934] Linking CXX executable bin/diagtool
85.582 [232/8/5935] Linking CXX executable bin/lld
89.259 [231/8/5936] Linking CXX shared library lib/libLTO.dylib
89.882 [230/8/5937] Linking CXX executable bin/llvm-lto
90.337 [229/8/5938] Linking CXX executable tools/lld/unittests/AsLibELF/LLDAsLibELFTests
90.456 [228/8/5939] Linking CXX executable bin/clang-diff
90.745 [227/8/5940] Linking CXX executable bin/clang-offload-packager
91.365 [226/8/5941] Linking CXX executable bin/clang-offload-bundler
92.742 [225/8/5942] Linking CXX executable tools/lld/unittests/AsLibAll/LLDAsLibAllTests
93.371 [224/8/5943] Linking CXX executable bin/clang-repl
FAILED: [code=1] bin/clang-repl 
: && /opt/homebrew/opt/ccache/libexec/clang++ -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX14.4.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names -Wl,-dead_strip -Wl,-no_warn_duplicate_libraries -rdynamic tools/clang/tools/clang-repl/CMakeFiles/clang-repl.dir/ClangRepl.cpp.o -o bin/clang-repl  -Wl,-rpath, at loader_path/../lib  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libLLVMCore.a  lib/libLLVMLineEditor.a  lib/libLLVMOption.a  lib/libLLVMOrcJIT.a  lib/libLLVMOrcShared.a  lib/libLLVMSupport.a  lib/libLLVMTargetParser.a  lib/libclangAST.a  lib/libclangBasic.a  lib/libclangFrontend.a  lib/libclangInterpreter.a  /Library/Developer/CommandLineTools/SDKs/MacOSX14.4.sdk/usr/lib/libedit.tbd  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Desc.a  lib/libLLVMMCDisassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libclangFrontendTool.a  lib/libclangCodeGen.a  lib/libLLVMCoverage.a  lib/libLLVMFrontendDriver.a  lib/libLLVMLTO.a  lib/libLLVMExtensions.a  lib/libclangExtractAPI.a  lib/libclangInstallAPI.a  lib/libLLVMTextAPIBinaryReader.a  lib/libclangRewriteFrontend.a  lib/libclangStaticAnalyzerFrontend.a  lib/libclangStaticAnalyzerCheckers.a  lib/libclangStaticAnalyzerCore.a  lib/libclangCrossTU.a  lib/libclangIndex.a  lib/libclangFrontend.a  lib/libclangDriver.a  lib/libclangParse.a  lib/libclangSerialization.a  lib/libclangSema.a  lib/libclangAPINotes.a  lib/libclangEdit.a  lib/libclangAnalysis.a  lib/libclangASTMatchers.a  lib/libclangAST.a  lib/libLLVMFrontendHLSL.a  lib/libclangSupport.a  lib/libclangFormat.a  lib/libclangToolingInclusions.a  lib/libclangToolingCore.a  lib/libclangRewrite.a  lib/libclangLex.a  lib/libclangBasic.a  lib/libLLVMOrcDebugging.a  lib/libLLVMOrcJIT.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMCodeGen.a  lib/libLLVMCGData.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMHipStdPar.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMBitWriter.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMObjectYAML.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMFrontendDirective.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMLinker.a  lib/libLLVMIRPrinter.a  lib/libLLVMInstrumentation.a  lib/libLLVMTransformUtils.a  lib/libLLVMExecutionEngine.a  lib/libLLVMTarget.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoGSYM.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMWindowsDriver.a  lib/libLLVMRuntimeDyld.a  lib/libLLVMJITLink.a  lib/libLLVMOption.a  lib/libLLVMOrcTargetProcess.a  lib/libLLVMOrcShared.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMTextAPI.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMDebugInfoDWARFLowLevel.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lm  /Library/Developer/CommandLineTools/SDKs/MacOSX14.4.sdk/usr/lib/libz.tbd  /opt/homebrew/lib/libzstd.dylib && :
ld: write() failed, errno=28
clang: error: linker command failed with exit code 1 (use -v to see invocation)
94.382 [224/7/5944] Linking CXX executable bin/clang-linker-wrapper
99.734 [224/6/5945] Linking CXX executable bin/clang-nvlink-wrapper
100.244 [224/5/5946] Linking CXX executable bin/clang-sycl-linker
100.572 [224/4/5947] Linking CXX executable bin/clang-import-test
101.970 [224/3/5948] Linking CXX executable bin/clang-scan-deps
102.326 [224/2/5949] Linking CXX executable bin/clang-installapi
102.869 [224/1/5950] Linking CXX executable bin/c-index-test
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/150210