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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Linking error for immediate functions returning void in Clang"
href="https://bugs.llvm.org/show_bug.cgi?id=52183">52183</a>
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<th>Summary</th>
<td>Linking error for immediate functions returning void in Clang
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>12.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++2b
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>fchelnokov@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>Clang++ produces linker error if one calls an immediate function returning void
not from a context of another immediate function as in the example:
```
consteval void f(int * x) {
if(x) *x = 1;
}
consteval int g() {
int y = 0;
f(&y);
return y;
}
int main() {
(void)g(); //ok everywhere
f(nullptr); //linker error in Clang
}
```
The error is:
```
undefined reference to `f(int*)'
```
Demo: <a href="https://gcc.godbolt.org/z/PT8ezfnrW">https://gcc.godbolt.org/z/PT8ezfnrW</a>
Related discussion: <a href="https://stackoverflow.com/q/69513993/7325599">https://stackoverflow.com/q/69513993/7325599</a></pre>
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