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<body><span class="vcard"><a class="email" href="mailto:yaron.keren@gmail.com" title="Yaron Keren <yaron.keren@gmail.com>"> <span class="fn">Yaron Keren</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - clang does not support GCC's TLS emulation"
href="http://llvm.org/bugs/show_bug.cgi?id=20737">bug 20737</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WONTFIX
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - clang does not support GCC's TLS emulation"
href="http://llvm.org/bugs/show_bug.cgi?id=20737#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - clang does not support GCC's TLS emulation"
href="http://llvm.org/bugs/show_bug.cgi?id=20737">bug 20737</a>
from <span class="vcard"><a class="email" href="mailto:yaron.keren@gmail.com" title="Yaron Keren <yaron.keren@gmail.com>"> <span class="fn">Yaron Keren</span></a>
</span></b>
<pre>Hi,
I thought it won't be so easy... anyhow,
__emutls_v._ZSt11__once_call
__emutls_v._ZSt15__once_callable
appear in libstdc++6.dll from mingw-builds 4.8.3 and 4.9.1, 32 bit, posix
threads, dwarf eh which are very current releases:
<a href="http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.8.3/threads-posix/dwarf/">http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.8.3/threads-posix/dwarf/</a>
<a href="http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.9.1/threads-posix/dwarf/">http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.9.1/threads-posix/dwarf/</a>
The win32-threads version does not have these in libstdc++6.dll, but for a bad
reason - it does not have C++11 threading and atomics! the code generated by
<a href="http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.9.1/threads-win32/dwarf/">http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.9.1/threads-win32/dwarf/</a>
the example produces identical code for both posix and win32 version and using
emutls:
...
movl $___emutls_v.a, (%esp)
call ___emutls_get_address
movl $10, (%eax)
...
Do you know of a mingw distribution not using emutls and compatible with clang?
Thanks for looking into this.</pre>
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