[Webkit-unassigned] [Bug 162302] New: [GTK] webkit-gtk-2.14.0 build failure of ScrollbarThemeGtk with libc++

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=162302

            Bug ID: 162302
           Summary: [GTK] webkit-gtk-2.14.0 build failure of
                    ScrollbarThemeGtk with libc++
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: OS X 10.11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jeremyhu at apple.com
                CC: bugs-noreply at webkitgtk.org

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.

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