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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - implement -Wbuiltin-declaration-mismatch"
href="https://bugs.llvm.org/show_bug.cgi?id=41850">41850</a>
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<th>Summary</th>
<td>implement -Wbuiltin-declaration-mismatch
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>8.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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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>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ndesaulniers@google.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk, srhines@google.com
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<pre>Looks like gcc picked up a useful warning in the 7.1 release:
void puts(const char*);
<source>:4:6: warning: conflicting types for built-in function 'puts'; expected
'int(const char *)' [-Wbuiltin-declaration-mismatch]
4 | void puts(const char*);
| ^~~~
<source>:1:1: note: 'puts' is declared in header '<stdio.h>'
+++ |+#include <stdio.h>
1 | int foo();
Compiler returned: 0</pre>
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