[Development] qt-4.8.6 + gcc5 fails to build ?

[Rex Dieter]

Fedora development has recently adopted gcc5, and we've run into several 
problems, one of which is that qt-4.8.6 fails to build, when linking 
libQtGui:

.obj/release-shared/qdrawhelper_sse2.o: In function `unsigned int const* 
qt_fetch_radial_gradient_template<QRadialFetchSimd<QSimdSse2> >(unsigned 
int*, Operator const*, QSpanData const*, int, int, int)':
/builddir/build/BUILD/qt-everywhere-opensource-
src-4.8.6/src/gui/../../include/QtGui/private/../../../src/gui/painting/qdrawhelper_p.h:396: 
undefined reference to `qt_memfill32'
collect2: error: ld returned 1 exit status

same problem with latest 4.8.7 2015-02-02-3 snapshot.

Currently tracking issue @
https://bugreports.qt.io/browse/QTBUG-44466

anyone with similar or different experiences?

-- Rex