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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] webkit-gtk-2.14.0 build failure of ScrollbarThemeGtk with libc++"
href="https://bugs.webkit.org/show_bug.cgi?id=162302">162302</a>
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<th>Summary</th>
<td>[GTK] webkit-gtk-2.14.0 build failure of ScrollbarThemeGtk with libc++
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>OS X 10.11
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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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>jeremyhu@apple.com
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<th>CC</th>
<td>bugs-noreply@webkitgtk.org
</td>
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<p>
<div>
<pre>2.14.0 fails to build with the following error using clang+libc++ on darwin:
webkitgtk-2.14.0/Source/WebCore/platform/gtk/ScrollbarThemeGtk.cpp:547:35: error: call to 'abs' is ambiguous
contentsRect.move(std::abs(rect.width() - preferredSize.width()), 0);
^~~~~~~~
../include/c++/v1/cmath:664:1: note: candidate function
abs(float __lcpp_x) _NOEXCEPT {return fabsf(__lcpp_x);}
^
../include/c++/v1/cmath:668:1: note: candidate function
abs(double __lcpp_x) _NOEXCEPT {return fabs(__lcpp_x);}
^
../include/c++/v1/cmath:672:1: note: candidate function
abs(long double __lcpp_x) _NOEXCEPT {return fabsl(__lcpp_x);}
^
webkitgtk-2.14.0/Source/WebCore/platform/gtk/ScrollbarThemeGtk.cpp:552:34: error: call to 'abs' is ambiguous
contentsRect.move(0, std::abs(rect.height() - preferredSize.height()));
^~~~~~~~
../include/c++/v1/cmath:664:1: note: candidate function
abs(float __lcpp_x) _NOEXCEPT {return fabsf(__lcpp_x);}
^
../include/c++/v1/cmath:668:1: note: candidate function
abs(double __lcpp_x) _NOEXCEPT {return fabs(__lcpp_x);}
^
../include/c++/v1/cmath:672:1: note: candidate function
abs(long double __lcpp_x) _NOEXCEPT {return fabsl(__lcpp_x);}
^
2 errors generated.
Casting the call site to (double) addresses the issue.</pre>
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