[llvm] Reapply [MachO] Move getArchTriple implementation..." with fixes. (PR #161949)

Sat Oct 4 22:16:01 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-multistage` running on `ppc64le-clang-multistage-test` while building `llvm` at step 4 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/76/builds/13088

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

```
Step 4 (build stage 1) failure: 'ninja' (failure)
...
[5361/6536] Creating library symlink lib/libLLVMSystemZAsmParser.so
[5362/6536] Linking CXX shared library lib/libLLVMWebAssemblyAsmParser.so.22.0git
[5363/6536] Creating library symlink lib/libLLVMHexagonAsmParser.so
[5364/6536] Creating library symlink lib/libLLVMVEAsmParser.so
[5365/6536] Creating library symlink lib/libLLVMWebAssemblyAsmParser.so
[5366/6536] Linking CXX shared library lib/libLLVMMipsAsmParser.so.22.0git
[5367/6536] Creating library symlink lib/libLLVMMipsAsmParser.so
[5368/6536] Linking CXX shared library lib/libLLVMObject.so.22.0git
[5369/6536] Creating library symlink lib/libLLVMObject.so
[5370/6536] Linking CXX executable bin/llvm-size
FAILED: bin/llvm-size 
: && /usr/lib64/ccache/c++ -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-array-bounds -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -Wl,-rpath-link,/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/./lib  -Wl,--gc-sections tools/llvm-size/CMakeFiles/llvm-size.dir/llvm-size.cpp.o tools/llvm-size/CMakeFiles/llvm-size.dir/llvm-size-driver.cpp.o -o bin/llvm-size  -Wl,-rpath,"\$ORIGIN/../lib:/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib:"  lib/libLLVMObject.so.22.0git  lib/libLLVMOption.so.22.0git  -lpthread  lib/libLLVMTargetParser.so.22.0git  lib/libLLVMSupport.so.22.0git  -Wl,-rpath-link,/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/lib && :
/usr/bin/ld: tools/llvm-size/CMakeFiles/llvm-size.dir/llvm-size.cpp.o: undefined reference to symbol '_ZN4llvm5MachO13getArchTripleEjjPPKcS3_'
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/./lib/libLLVMBinaryFormat.so.22.0git: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
[5371/6536] Building CXX object lib/ExecutionEngine/Orc/CMakeFiles/LLVMOrcJIT.dir/ExecutionUtils.cpp.o
[5372/6536] Linking CXX shared library lib/libLLVMDlltoolDriver.so.22.0git
[5373/6536] Linking CXX shared library lib/libLLVMXRay.so.22.0git
[5374/6536] Linking CXX shared library lib/libLLVMLibDriver.so.22.0git
[5375/6536] Building CXX object lib/DebugInfo/LogicalView/CMakeFiles/LLVMDebugInfoLogicalView.dir/Readers/LVDWARFReader.cpp.o
[5376/6536] Linking CXX executable bin/llvm-cvtres
[5377/6536] Linking CXX shared library lib/libLLVMInterfaceStub.so.22.0git
[5378/6536] Linking CXX executable bin/llvm-strings
[5379/6536] Linking CXX executable bin/llvm-rc
[5380/6536] Linking CXX shared library lib/libLLVMARMDesc.so.22.0git
[5381/6536] Linking CXX shared library lib/libLLVMRuntimeDyld.so.22.0git
[5382/6536] Linking CXX shared library lib/libLLVMObjCopy.so.22.0git
[5383/6536] Linking CXX shared library lib/libLLVMDebugInfoDWARF.so.22.0git
[5384/6536] Linking CXX shared library lib/libLLVMDebugInfoPDB.so.22.0git
[5385/6536] Linking CXX shared library lib/libLLVMObjectYAML.so.22.0git
[5386/6536] Linking CXX shared library lib/libLLVMJITLink.so.22.0git
[5387/6536] Building CXX object lib/ProfileData/Coverage/CMakeFiles/LLVMCoverage.dir/CoverageMappingReader.cpp.o
In file included from /usr/include/c++/8/cassert:44,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/InstrProf.h:40,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h:27,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/Coverage/CoverageMappingReader.h:19,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp:14:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘llvm::ArrayRef<llvm::InstrProfValueSiteRecord> llvm::InstrProfRecord::getValueSitesForKind(uint32_t) const’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/InstrProf.h:1028:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘std::vector<llvm::InstrProfValueSiteRecord>& llvm::InstrProfRecord::getOrCreateValueSitesForKind(uint32_t)’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/ProfileData/InstrProf.h:1037:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
[5388/6536] Building CXX object lib/DebugInfo/LogicalView/CMakeFiles/LLVMDebugInfoLogicalView.dir/LVReaderHandler.cpp.o
[5389/6536] Building CXX object tools/clang/tools/clang-installapi/CMakeFiles/clang-installapi.dir/Options.cpp.o
[5390/6536] Building AArch64GenSubtargetInfo.inc...
[5391/6536] Building CXX object lib/Transforms/Instrumentation/CMakeFiles/LLVMInstrumentation.dir/AddressSanitizer.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/161949