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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Link error with _LIBCPP_HIDE_FROM_ABI_PER_TU"
href="https://bugs.llvm.org/show_bug.cgi?id=42676">42676</a>
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<th>Summary</th>
<td>Link error with _LIBCPP_HIDE_FROM_ABI_PER_TU
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<th>Product</th>
<td>libc++
</td>
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<th>Version</th>
<td>9.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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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>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ldionne@apple.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<pre>The following code produces a link error:
$ cat <<EOF | clang++ -xc++ -std=c++14 - -D_LIBCPP_HIDE_FROM_ABI_PER_TU
#include <memory>
#include <string>
int main() {
std::string s(10u, '-', std::allocator<char>());
(void)s;
}
EOF
Output:
Undefined symbols for architecture x86_64:
"std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> >::basic_string(unsigned long, char,
std::__1::allocator<char> const&)", referenced from:
_main in --68d1cd.o
Live repro: <a href="https://wandbox.org/permlink/EWKWqwBbq3bpNhr3">https://wandbox.org/permlink/EWKWqwBbq3bpNhr3</a>
The problem happens in C++03/C++11/C++14.</pre>
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