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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - build fails with memory model cannot be stronger than success memory model for ‘__atomic_compare_exchange’"
href="https://bugs.webkit.org/show_bug.cgi?id=155371">155371</a>
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<th>Summary</th>
<td>build fails with memory model cannot be stronger than success memory model for ‘__atomic_compare_exchange’
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
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<th>Version</th>
<td>WebKit Local Build
</td>
</tr>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>Normal
</td>
</tr>
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<th>Priority</th>
<td>P2
</td>
</tr>
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<th>Component</th>
<td>WebKit Gtk
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>buchner.johannes@gmx.at
</td>
</tr>
<tr>
<th>CC</th>
<td>bugs-noreply@webkitgtk.org
</td>
</tr></table>
<p>
<div>
<pre>When compiling webkit-gtk with the -Os flag, gcc fails with:
FAILED: /usr/bin/x86_64-pc-linux-gnu-g++ -DBUILDING_GTK__=1 -DBUILDING_WITH_CMAKE=1 -DBUILDING_WTF -DDATA_DIR=\"share\" -DGETTEXT_PACKAGE=\"WebKit2GTK-4.0\" -DHAVE_CONFIG_H=1 -DUSER_AGENT_GTK_MAJOR_VERSION=602 -DUSER_AGENT_GTK_MINOR_VERSION=1 -DWEBKITGTK_API_VERSION_STRING=\"4.0\" -DENABLE_JIT=0 -DENABLE_YARR_JIT=0 -DENABLE_ASSEMBLER=0 -DNDEBUG -march=native -O2 -pipe -fno-strict-aliasing -std=c++11 -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/bmalloc -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/dtoa -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/text -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/threads -I/var/tmp/portage/net-libs/webkit-gtk-2.10.7/wor
In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/include/g++-v4/atomic:41:0,
from /var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/Atomics.h:29,
from /var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/ParkingLot.h:31,
from /var/tmp/portage/net-libs/webkit-gtk-2.10.7/work/webkitgtk-2.10.7/Source/WTF/wtf/ParkingLot.cpp:27:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/include/g++-v4/bits/atomic_base.h: In member function ‘void WTF::WordLock::lock()’:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/include/g++-v4/bits/atomic_base.h:538:70: error: failure memory model cannot be stronger than success memory model for ‘__atomic_compare_exchange’
return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);
^
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/include/g++-v4/bits/atomic_base.h: In member function ‘void WTF::WordLock::unlock()’:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/include/g++-v4/bits/atomic_base.h:538:70: error: failure memory model cannot be stronger than success memory model for ‘__atomic_compare_exchange’
return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);
^
ninja: build stopped: subcommand failed.
I can reproduce the bug for webkit-gtk-2.10.4-r1.
The build with -Os succeeded for webkit-gtk-2.8.5.
This bug has been reported in Gentoo at <a href="https://bugs.gentoo.org/show_bug.cgi?id=575388">https://bugs.gentoo.org/show_bug.cgi?id=575388</a></pre>
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