Bug#828198: webkitgtk: FTBFS with gcc-6 and glibc 2.23

[Daniel Schepler]

Source: webkitgtk
Version: 2.4.11-1
Severity: important

>From my pbuilder build log, using a chroot setup preferring
gcc-defaults and glibc from experimental:

...
../Source/WebCore/platform/gtk/GtkClickCounter.cpp: In member function
'int WebCore::GtkClickCounter::clickCountForGdkButtonEvent(GtkWidget*,
GdkEventButton*)':
../Source/WebCore/platform/gtk/GtkClickCounter.cpp:88:59: error: call
of overloaded 'abs(gdouble)' is ambiguous
         || ((abs(buttonEvent->x - m_previousClickPoint.x()) <
doubleClickDistance)
                                                           ^
In file included from /usr/include/c++/6/cstdlib:75:0,
                 from /usr/include/c++/6/stdlib.h:36,
                 from ../Source/WTF/wtf/FastMalloc.h:25,
                 from ../Source/JavaScriptCore/config.h:60,
                 from ../Source/WebCore/platform/gtk/GtkClickCounter.cpp:19:
/usr/include/stdlib.h:774:12: note: candidate: int abs(int)
 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
            ^~~
In file included from /usr/include/c++/6/stdlib.h:36:0,
                 from ../Source/WTF/wtf/FastMalloc.h:25,
                 from ../Source/JavaScriptCore/config.h:60,
                 from ../Source/WebCore/platform/gtk/GtkClickCounter.cpp:19:
/usr/include/c++/6/cstdlib:180:3: note: candidate: long long int
std::abs(long long int)
   abs(long long __x) { return __builtin_llabs (__x); }
   ^~~
/usr/include/c++/6/cstdlib:172:3: note: candidate: long int std::abs(long int)
   abs(long __i) { return __builtin_labs(__i); }
   ^~~
../Source/WebCore/platform/gtk/GtkClickCounter.cpp:89:62: error: call
of overloaded 'abs(gdouble)' is ambiguous
             && (abs(buttonEvent->y - m_previousClickPoint.y()) <
doubleClickDistance)
                                                              ^
In file included from /usr/include/c++/6/cstdlib:75:0,
                 from /usr/include/c++/6/stdlib.h:36,
                 from ../Source/WTF/wtf/FastMalloc.h:25,
                 from ../Source/JavaScriptCore/config.h:60,
                 from ../Source/WebCore/platform/gtk/GtkClickCounter.cpp:19:
/usr/include/stdlib.h:774:12: note: candidate: int abs(int)
 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
            ^~~
In file included from /usr/include/c++/6/stdlib.h:36:0,
                 from ../Source/WTF/wtf/FastMalloc.h:25,
                 from ../Source/JavaScriptCore/config.h:60,
                 from ../Source/WebCore/platform/gtk/GtkClickCounter.cpp:19:
/usr/include/c++/6/cstdlib:180:3: note: candidate: long long int
std::abs(long long int)
   abs(long long __x) { return __builtin_llabs (__x); }
   ^~~
/usr/include/c++/6/cstdlib:172:3: note: candidate: long int std::abs(long int)
   abs(long __i) { return __builtin_labs(__i); }
   ^~~
GNUmakefile:51931: recipe for target
'Source/WebCore/platform/gtk/libPlatformGtk_la-GtkClickCounter.lo'
failed
make[2]: *** [Source/WebCore/platform/gtk/libPlatformGtk_la-GtkClickCounter.lo]
Error 1
make[2]: *** Waiting for unfinished jobs....
-- 
Daniel Schepler