In openSUSE:Factory:Staging:Gcc6 fails to build on x86_64 at least due to
the following bug in Qt sources GCC now errors on:
[ 3819s] g++ -c -fmessage-length=0 -grecord-gcc-switches -O2 -Wall
-D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
-fasynchronous-unwind-tables -Wno-error=misleading-indentation -g
-DOPENSSL_LOAD_CONF -O2 -fvisibility=hidden -fvisibility-inlines-hidden -Wall
-W -D_REENTRANT -fPIC -DQT_SHARED -DQT_BUILD_XMLPATTERNS_LIB
-DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS
-DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_NO_DEBUG
-DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE
-DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_HAVE_SSE3 -DQT_HAVE_SSSE3 -DQT_HAVE_SSE4_1
-DQT_HAVE_SSE4_2 -DQT_HAVE_AVX -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE
-I../../mkspecs/linux-g++ -I. -I../../include/QtCore -I../../include/QtNetwork
-I../../include -I../../include/QtXmlPatterns -I.rcc/release-shared -Iacceltree
-Idata -Iapi -Ienvironment -Iexpr -Ifunctions -Iiterators -Ijanitors -Iparser
-Ischema -Itype -Iutils -I.moc/release-shared -o
.obj/release-shared/qvariableloader.o api/qvariableloader.cpp
[ 3824s] In file included from api/qcoloringmessagehandler_p.h:57:0,
[ 3824s] from api/qxmlquery_p.h:67,
[ 3824s] from api/qvariableloader.cpp:54:
[ 3824s] api/qcoloroutput_p.h:74:60: warning: result of '(1048575 << 20)'
requires 41 bits to represent, but 'int' only has 32 bits [-Wshift-overflow=]
[ 3824s] BackgroundMask = ((1 << BackgroundShift) - 1)
<< BackgroundShift
[ 3824s]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
[ 3824s] api/qcoloroutput_p.h:74:60: error: shift expression '(1048575 <<
20)' overflows [-fpermissive]
[ 3824s] api/qcoloroutput_p.h:74:63: error: enumerator value for
'BackgroundMask' is not an integer constant
[ 3824s] BackgroundMask = ((1 << BackgroundShift) - 1)
<< BackgroundShift
[ 3824s]
^~~~~~~~~~~~~~~
[ 3827s] Makefile:2580: recipe for target
'.obj/release-shared/qvariableloader.o' failed
[ 3827s] make[1]: *** [.obj/release-shared/qvariableloader.o] Error 1
[ 3827s] make[1]: *** Waiting for unfinished jobs....