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<p class="MsoNormal">Dear clang experts,<o:p></o:p></p>
<p class="MsoNormal">I want to build out ELF image using clang in Windows OS. But I met an issue when using “-fuse-ld=ld.lld” to ask clang launch ld.lld.exe as a linker.<o:p></o:p></p>
<p class="MsoNormal">Somehow clang always passes additional parameter to ld.lld: <span style="color:red;background:yellow;mso-highlight:yellow">
"-libpath:E:\\bin\\LLVM\\lib\\clang\\12.0.0\\lib\\windows" -nologo</span><span style="color:red"><o:p></o:p></span></p>
<p class="MsoNormal">I found this behavior when I pass “-v” to clang. With “-v”, clang will output the complete command line about how ld.lld is invoked.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Command as below:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">"<b>E:\bin\LLVM\bin\clang</b>" -o e:\work\edk2\Build\UefiPayloadPkgX64\DEBUG_CLANGDWARF\IA32\UefiPayloadPkg\UefiPayloadEntry\UniversalPayloadEntry\DEBUG\UniversalPayloadEntry.elf -nostdlib -Wl,-n,-q,--gc-sections -z common-page-size=0x40
-Wl,--entry,_ModuleEntryPoint -u _ModuleEntryPoint -Wl,-Map,e:\work\edk2\Build\UefiPayloadPkgX64\DEBUG_CLANGDWARF\IA32\UefiPayloadPkg\UefiPayloadEntry\UniversalPayloadEntry\DEBUG/UniversalPayloadEntry.map,--whole-archive
<span style="background:yellow;mso-highlight:yellow">-fuse-ld=ld.lld</span> -flto -Wl,-melf_i386 -Wl,--format=elf @e:\work\edk2\Build\UefiPayloadPkgX64\DEBUG_CLANGDWARF\IA32\UefiPayloadPkg\UefiPayloadEntry\UniversalPayloadEntry\OUTPUT\static_library_files.lst
<b><span style="background:yellow;mso-highlight:yellow">-v</span><o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">clang version 12.0.0<o:p></o:p></p>
<p class="MsoNormal">Target: x86_64-pc-windows-msvc<o:p></o:p></p>
<p class="MsoNormal">Thread model: posix<o:p></o:p></p>
<p class="MsoNormal">InstalledDir: E:\bin\LLVM\bin<o:p></o:p></p>
<p class="MsoNormal">clang: warning: argument unused during compilation: '-u _ModuleEntryPoint' [-Wunused-command-line-argument]<o:p></o:p></p>
<p class="MsoNormal">"<b>E:\\bin\\LLVM\\bin\\ld.lld</b>" "-out:e:\\work\\edk2\\Build\\UefiPayloadPkgX64\\DEBUG_CLANGDWARF\\IA32\\UefiPayloadPkg\\UefiPayloadEntry\\UniversalPayloadEntry\\DEBUG\\UniversalPayloadEntry.elf"
<span style="color:red;background:yellow;mso-highlight:yellow">"-libpath:E:\\bin\\LLVM\\lib\\clang\\12.0.0\\lib\\windows" -nologo</span><span style="color:red">
</span>-n -q --gc-sections common-page-size=0x40 --entry _ModuleEntryPoint -Map "e:\\work\\edk2\\Build\\UefiPayloadPkgX64\\DEBUG_CLANGDWARF\\IA32\\UefiPayloadPkg\\UefiPayloadEntry\\UniversalPayloadEntry\\DEBUG/UniversalPayloadEntry.map" --whole-archive -melf_i386
--format=elf e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePcdLibNull/BasePcdLibNull/OUTPUT/BasePcdLibNull.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/RegisterFilterLibNull/RegisterFilterLibNull/OUTPUT/FilterLibNull.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BaseLib/BaseLib/OUTPUT/BaseLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr/OUTPUT/BaseMemoryLibRepStr.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic/OUTPUT/BaseIoLibIntrinsic.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePciExpressLib/BasePciExpressLib/OUTPUT/BasePciExpressLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/UefiPayloadPkg/Library/DxeHobListLibNull/DxeHobListLibNull/OUTPUT/DxeHobListLibNull.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/UefiPayloadPkg/Library/PayloadEntryHobLib/HobLib/OUTPUT/HobLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePciLibPciExpress/BasePciLibPciExpress/OUTPUT/BasePciLibPciExpress.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/UefiPayloadPkg/Library/UniversalPayloadPlatformHookLib/PlatformHookLib/OUTPUT/PlatformHookLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib/OUTPUT/BaseDebugPrintErrorLevelLib.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePrintLib/BasePrintLib/OUTPUT/BasePrintLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550/OUTPUT/BaseSerialPortLib16550.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort/OUTPUT/BaseDebugLibSerialPort.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePeCoffExtraActionLibNull/BasePeCoffExtraActionLibNull/OUTPUT/PeCoffExtraActionLibNull.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/MdePkg/Library/BasePeCoffLib/BasePeCoffLib/OUTPUT/BasePeCoffLib.lib e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib/OUTPUT/BaseUefiCpuLib.lib
e:/work/edk2/Build/UefiPayloadPkgX64/DEBUG_CLANGDWARF/IA32/UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry/OUTPUT/UniversalPayloadEntry.lib<o:p></o:p></p>
<p class="MsoNormal">ld.lld: error: unknown argument '-nologo'<o:p></o:p></p>
<p class="MsoNormal">ld.lld: error: unable to find library -libpath:E:\bin\LLVM\lib\clang\12.0.0\lib\windows<o:p></o:p></p>
<p class="MsoNormal">ld.lld: error: cannot open common-page-size=0x40: no such file or directory<o:p></o:p></p>
<p class="MsoNormal">clang: error: linker command failed with exit code 1 (use -v to see invocation)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Ray<o:p></o:p></p>
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