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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-cl /Gv __vectorcall failed to link Windows API"
href="https://bugs.llvm.org/show_bug.cgi?id=42531">42531</a>
</td>
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<th>Summary</th>
<td>clang-cl /Gv __vectorcall failed to link Windows API
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Driver
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zufuliu@163.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>The sample code failed to link when build with /Gv (LLVM 9.0.0-r363781).
// test.cpp
#include <windows.h>
int main(int argc, char* argv[]) {
return lstrcmpA(argv[0], argv[1]);
}
clang-cl /Gv test.cpp
test-d27210.obj : error LNK2019: unresolved external symbol __imp_lstrcmpA@@16
referenced in function main
test.exe : fatal error LNK1120: 1 unresolved externals
clang-cl: error: linker command failed with exit code 1120 (use -v to see
invocation)
but build succeeded with /Gd (__cdecl), /Gr (__fastcall), /Gz (__stdcall) or
without any option.
prototype for lstrcmpA() is at Windows
Kits\10\Include\10.0.17763.0\um\WinBase.h line 2676:
WINBASEAPI
int
WINAPI
lstrcmpA(
_In_ LPCSTR lpString1,
_In_ LPCSTR lpString2
);</pre>
</div>
</p>
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