<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/133199>133199</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [MacOS 15][AppleClang] libtool duplicate member name warnings
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          farzonl
      </td>
    </tr>
</table>

<pre>
    I am seeing the following warnings since https://github.com/llvm/llvm-project/commit/7f920e2e5f70b#diff-539a73d8f756c8d7ff989917f14b4932a0e25b8374f659ffc26e386912bbaf08

System settings:
```
MacOS 15.3.2
machdep.cpu.cores_per_package: 16
machdep.cpu.core_count: 16
machdep.cpu.logical_per_package: 16
machdep.cpu.thread_count: 16
machdep.cpu.brand_string: Apple M3 Max
```

clang version:
```
Apple clang version 16.0.0 (clang-1600.0.26.6)
Target: arm64-apple-darwin24.3.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
```

This should still be relatively new: https://developer.apple.com/documentation/xcode-release-notes/xcode-16-release-notes


warnings:
```
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'AMDGPU.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/AMDGPU.cpp.o(AMDGPU.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/AMDGPU.cpp.o(AMDGPU.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'ARM.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/ARM.cpp.o(ARM.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/ARM.cpp.o(ARM.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'Hexagon.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/Hexagon.cpp.o(Hexagon.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/Hexagon.cpp.o(Hexagon.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'NVPTX.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/NVPTX.cpp.o(NVPTX.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/NVPTX.cpp.o(NVPTX.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'PPC.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/PPC.cpp.o(PPC.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/PPC.cpp.o(PPC.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'RISCV.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/RISCV.cpp.o(RISCV.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/RISCV.cpp.o(RISCV.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'SPIR.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/SPIR.cpp.o(SPIR.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/SPIR.cpp.o(SPIR.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'SystemZ.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/SystemZ.cpp.o(SystemZ.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/SystemZ.cpp.o(SystemZ.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'WebAssembly.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/WebAssembly.cpp.o(WebAssembly.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/WebAssembly.cpp.o(WebAssembly.cpp.o)'
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning duplicate member name 'X86.cpp.o' from 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/TargetBuiltins/X86.cpp.o(X86.cpp.o)' and 'tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/Targets/X86.cpp.o(X86.cpp.o)'
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzMWE1v4zYQ_TX0hbBAUd8HH7QxtM3BbZCk26CXgKJGMncpUhApJ-mvL6jYje1kkyxQGQYChMMZz3vDNx7Aw4wRjQJYoOgLipYzNti17hc16__RSs5KXT0tLjFrsQEQqsF2DbjWUuoHZz2wXgnVGGyE4oDX1nYGBTmiBaJFI-x6KD2uW0QLKTe7f_Ou19-BW0QLrttWuENSZ5QAhahOSIloUIm6nkdBxpKgSuskinlaJXWdpVnmJ7UflmEWUEaARmUaJGEdR1ldcxpDkMaZT8uS1SRFJEckv3kyFhx_ax1VR4_kKCbbP5KvGP_jBvuRF3gUkbxlfF1B5_Fu8Ljuwdx30N93jP9gDaAgx378RtQ914Oyb7qlbgRn8sM0dt0Dq95JVPZMVffG9kI1LiDvOgl4FeAVezyqCZGcS6YavIHeCK1eV_384YMg7Mce8QhGNB3v535MiEc8Gnsxohki-S3rGxjJsb6NwzlzSeYV6x-EoqEXeC7z7VgHbnUF0oV22gjH71IZy6SEail6d49o4UgIzqzQyiBa3HFdgce6DtHiQisLyrrrJWxA6g56RItbrSVfM_ESv4SaDdJ6j9zufIgWg3HRpVCvH-Z2LQw2az3IChsrpMQl4B4ks2ID8gkreHD0Dpu52nHwxpq3XV1pPrSg7FgBosWjIzTvQQIzMFfagvnv1o-PHCMZRPLdl-i1Rid6IVpIUTqXK3vLBlfDMzDgFtoSeqxYCxjRJF8tv1796fGu8zSiCa573bp7l8BBjq3znHMkWcFXcBgXK_YDCiHHJ9Hld28M3Pq9Sozcx_76Mghpn_kfgqWHZubgmar-X_RPwZ6tONerUynzgpTunSfU5OeA56rGb_DIGq1OpMgRWnpkT6fMJ4DPVaHfv13d3k2pjws4AEkPrGlE2WuKD7DPVZerq4upVdmDSPfOkyvyDu65qnF9eXPx7URT7AArPbCmm2AfgJ6rLjdXl9cnkmUfKt03phPlXcizlWT8tfn31MPrCCY9sicfYp_AP1eF_oIyNwbaUj5NrdIbUOkbd5Or9Qs8zlW1uzQ-0aTbQ0r3ztPNuXcA9_cBs2oRVFmQsRks_CQMSBiEUTJbL0o_hrj0gyxmYRRFfpqyhFU0gLIuOU_oTCwooREJaEJoGPqJl9Ka1wHEiZ_5Fc9KFBJomZCelJvW030zE8YMsPCDwM-ymWQlSDNuCClV8IBHL6IURctZvxh3euXQGBQSKYw1L2mssHJcLe52bChaoujLuHu6GB8vWuJtG_xE-912ZDb0cvHLC8aRqXvkbSmbBf03AAD__-ta6U8">