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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 - #pragma comment(lib) not ignored with MS extensions disabled"
href="https://bugs.llvm.org/show_bug.cgi?id=49536">49536</a>
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<th>Summary</th>
<td>#pragma comment(lib) not ignored with MS extensions disabled
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>c.schaerf@t-online.de
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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</tr></table>
<p>
<div>
<pre>Even without MS extensions, Clang still follows the #pragma comment (lib)
directive.
According to the documentation [1], they should per default only be active on
Windows platforms. However, on Linux and even with -fno-ms-extensions
explicitly set, the directive is still followed.
The source code
#pragma comment(lib, "testlib.lib")
int main() {
return 0;
}
compiles to the following assembly:
.text
.file "test.cpp"
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.cfi_startproc
# %bb.0:
xorl %eax, %eax
retq
.Lfunc_end0:
.size main, .Lfunc_end0-main
.cfi_endproc
# -- End function
.section .deplibs,"MS",@llvm_dependent_libraries,1
.ascii "testlib.lib"
.byte 0
.ident "clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project">https://github.com/llvm/llvm-project</a>
bc5e9ec2dccdd18f840a09fe63c196ae25ad99d5)"
.section ".note.GNU-stack","",@progbits
.addrsig
This behavior causes linker errors with LLD.
[1] <a href="https://clang.llvm.org/docs/UsersManual.html#microsoft-extensions">https://clang.llvm.org/docs/UsersManual.html#microsoft-extensions</a></pre>
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