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<p class="MsoNormal">lld doesn’t care about the file extension; it examines the first few bytes of the file to figure out the filetype. That error message means that examination failed: the header doesn’t correspond to any of the input filetypes lld-link supports.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Unix “file” utility is generally useful for figuring out what sort of file you’re working with. (On Windows, you can get it through Cygwin or gnuwin32.)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-Eli<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> llvm-dev <llvm-dev-bounces@lists.llvm.org> <b>On Behalf Of
</b>Osman Zakir via llvm-dev<br>
<b>Sent:</b> Sunday, November 10, 2019 7:58 AM<br>
<b>To:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> [EXT] [llvm-dev] lld-link.exe Can't Recognize .obj File Type?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Hi. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Just now when I tried to compile a .cpp file using the LLVM toolset in VS2019, I got two error messages from lld-link:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">lld-link : error : Debug\cust_std_lib_facilities.obj: unknown file type<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">lld-link : error : Debug\Ex10_10.obj: unknown file type<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">What's the reason for this, and is there a way to fix it? This is the first time I'm saying this error; I've used LLVM before and this error never came up when I know .obj files should've been
used then as well.<o:p></o:p></span></p>
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