All this is needed for qt-webkit to build if c++0x use is enabled
while using gcc-4.6 ...

you also need to append -fpermissive to the compiler flags
--- src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h
+++ src/3rdparty/javascriptcore/JavaScriptCore/wtf/TypeTraits.h
@@ -23,6 +23,7 @@
 #define TypeTraits_h
 
 #include "Platform.h"
+#include <tr1/memory>
 
 #if (defined(__GLIBCXX__) && (__GLIBCXX__ >= 20070724) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || (defined(_MSC_VER) && (_MSC_VER >= 1600))
 #include <type_traits>
--- src/3rdparty/webkit/Source/JavaScriptCore/wtf/TypeTraits.h
+++ src/3rdparty/webkit/Source/JavaScriptCore/wtf/TypeTraits.h
@@ -23,6 +23,7 @@
 #define TypeTraits_h
 
 #include "Platform.h"
+#include <tr1/memory>
 
 #if (defined(__GLIBCXX__) && (__GLIBCXX__ >= 20070724) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || (defined(_MSC_VER) && (_MSC_VER >= 1600))
 #include <type_traits>
--- src/3rdparty/webkit/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
+++ src/3rdparty/webkit/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp
@@ -1106,7 +1106,7 @@ RegisterID* BytecodeGenerator::emitLoad(RegisterID* dst, double number)
     // FIXME: Our hash tables won't hold infinity, so we make a new JSValue each time.
     // Later we can do the extra work to handle that like the other cases.  They also don't
     // work correctly with NaN as a key.
-    if (isnan(number) || number == HashTraits<double>::emptyValue() || HashTraits<double>::isDeletedValue(number))
+    if (std::isnan(number) || number == HashTraits<double>::emptyValue() || HashTraits<double>::isDeletedValue(number))
         return emitLoad(dst, jsNumber(number));
     JSValue& valueInMap = m_numberMap.add(number, JSValue()).first->second;
     if (!valueInMap)
--- src/3rdparty/webkit/Source/JavaScriptCore/wtf/MathExtras.h
+++ src/3rdparty/webkit/Source/JavaScriptCore/wtf/MathExtras.h
@@ -137,8 +137,10 @@ inline double trunc(double num) { return num > 0 ? floor(num) : ceil(num); }
 inline long long abs(long long num) { return _abs64(num); }
 #endif
 
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
 inline bool isinf(double num) { return !_finite(num) && !_isnan(num); }
 inline bool isnan(double num) { return !!_isnan(num); }
+#endif
 inline bool signbit(double num) { return _copysign(1.0, num) < 0; }
 
 inline double nextafter(double x, double y) { return _nextafter(x, y); }
@@ -240,8 +242,10 @@ inline int clampToInteger(unsigned value)
 
 #if !COMPILER(MSVC) && !(COMPILER(RVCT) && PLATFORM(BREWMP)) && !OS(SOLARIS) && !OS(SYMBIAN)
 using std::isfinite;
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
 using std::isinf;
 using std::isnan;
+#endif
 using std::signbit;
 #endif
 
--- src/3rdparty/webkit/Source/WebCore/bindings/js/JSGeolocationCustom.cpp
+++ src/3rdparty/webkit/Source/WebCore/bindings/js/JSGeolocationCustom.cpp
@@ -80,7 +80,7 @@ static PassRefPtr<PositionOptions> createPositionOptions(ExecState* exec, JSValu
         if (exec->hadException())
             return 0;
         // If the value is positive infinity, there's nothing to do.
-        if (!(isinf(timeoutNumber) && (timeoutNumber > 0))) {
+        if (!(std::isinf(timeoutNumber) && (timeoutNumber > 0))) {
             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
             options->setTimeout(max(0, timeoutValue.toInt32(exec)));
             if (exec->hadException())
@@ -95,7 +95,7 @@ static PassRefPtr<PositionOptions> createPositionOptions(ExecState* exec, JSValu
         double maximumAgeNumber = maximumAgeValue.toNumber(exec);
         if (exec->hadException())
             return 0;
-        if (isinf(maximumAgeNumber) && (maximumAgeNumber > 0)) {
+        if (std::isinf(maximumAgeNumber) && (maximumAgeNumber > 0)) {
             // If the value is positive infinity, clear maximumAge.
             options->clearMaximumAge();
         } else {
--- src/3rdparty/webkit/Source/WebCore/html/HTMLInputElement.cpp
+++ src/3rdparty/webkit/Source/WebCore/html/HTMLInputElement.cpp
@@ -332,7 +332,7 @@ void HTMLInputElement::applyStep(double count, ExceptionCode& ec)
         return;
     }
     double newValue = current + step * count;
-    if (isinf(newValue)) {
+    if (std::isinf(newValue)) {
         ec = INVALID_STATE_ERR;
         return;
     }
--- src/3rdparty/webkit/Source/WebCore/html/NumberInputType.cpp
+++ src/3rdparty/webkit/Source/WebCore/html/NumberInputType.cpp
@@ -132,7 +132,7 @@ bool NumberInputType::stepMismatch(const String& value, double step) const
     if (!parseToDoubleForNumberType(value, &doubleValue))
         return false;
     doubleValue = fabs(doubleValue - stepBase());
-    if (isinf(doubleValue))
+    if (std::isinf(doubleValue))
         return false;
     // double's fractional part size is DBL_MAN_DIG-bit. If the current value
     // is greater than step*2^DBL_MANT_DIG, the following computation for