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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang and GCC disagree on the definition of "POD for the purpose of layout" for classes with a defaulted/deleted constructor/destructor/copy or move assignment operator"
href="https://bugs.llvm.org/show_bug.cgi?id=46711">46711</a>
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<th>Summary</th>
<td>Clang and GCC disagree on the definition of "POD for the purpose of layout" for classes with a defaulted/deleted constructor/destructor/copy or move assignment operator
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>riccibrun@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>For targets using the C++03 definition of POD for ABI purposes, GCC allows a
class type to be "POD for the purpose of layout" if the class has a defaulted
or deleted constructor/destructor/copy or move assignment operator. Clang does
not. Example:
struct S {
int i;
char b;
~S() = default;
};
struct T : S {
char c;
};
int i = sizeof(T); // 12 with GCC, 8 with Clang (on x86-64)
(<a href="https://godbolt.org/z/sbsM54">https://godbolt.org/z/sbsM54</a>)
This is not a new issue; GCC has this behaviour since at least GCC 4.5.3, and
clang has this behaviour since at least clang 3.0.</pre>
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