Emerge with Qt 5.8?

[Jasem Mutlaq]

So anyone was successful on compiling Qt 5.8 with emerge? I tried and got
the following errors:

qjsonparser.cpp
qjsonarray.cpp
qjsonobject.cpp
qjsonvalue.cpp
        link  -OUT:qmake.exe project.obj main.obj ioutils.obj proitems.obj
qmakevfs.obj  qmakeglobals.obj qmakeparser.obj qmakeevaluator.obj
qmakebuiltins.obj  makefile.obj unixmake.obj unixmake2.obj mingw_make.obj
 option.obj winmakefile.obj projectgenerator.obj propert
y.obj meta.obj  makefiledeps.obj metamakefile.obj xmloutput.obj
 msvc_nmake.obj msvc_vcproj.obj msvc_vcxproj.obj  msvc_objectmodel.obj
msbuild_objectmodel.obj registry.obj qbitarray.obj  qbuffer.obj
 qcryptographichash.obj  qfilesystementry.obj  qfilesystemengine.obj  qf
ilesystemengine_win.obj  qfilesystemiterator_win.obj  qfsfileengine.obj
 qfsfileengine_iterator.obj  qarraydata.obj  qbytearray.obj  qvsnprintf.obj
 qbytearraymatcher.obj  qdatetime.obj  qdir.obj  qdiriterator.obj
 qfiledevice.obj  qfile.obj  qtemporaryfile.obj  qabstrac
tfileengine.obj  qfsfileengine_win.obj  qsystemlibrary.obj  qfileinfo.obj
 qglobal.obj  qhash.obj  qiodevice.obj  qringbuffer.obj  qdebug.obj
 qlist.obj  qlinkedlist.obj  qlocale.obj  qlocale_tools.obj
 qlocale_win.obj  qmalloc.obj  qmap.obj  qregexp.obj  qtextcodec.obj
 qutfcodec.obj  qstring.obj  qstring_compat.obj  qstringlist.obj
 qstringbuilder.obj  qsystemerror.obj  qtextstream.obj  qdatastream.obj
 quuid.obj  qvector.obj  qsettings.obj  qlibraryinfo.obj  qvariant.obj
 qsettings_win.obj  qmetatype.obj  qxmlstream.obj  qxmlutils.ob
j  qnumeric.obj  qlogging.obj  qjson.obj  qjsondocument.obj
 qjsonparser.obj  qjsonarray.obj  qjsonobject.obj  qjsonvalue.obj ole32.lib
advapi32.lib shell32.lib qmake_pch.obj
Microsoft (R) Incremental Linker Version 14.00.23918.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        copy qmake.exe ..\bin\qmake.exe
        1 file(s) copied.
Info: creating stash file
R:\build\libs\qtbase\work\msvc2015-RelWithDebInfo-5.8\.qmake.stash
Info: creating cache file
R:\build\libs\qtbase\work\msvc2015-RelWithDebInfo-5.8\.qmake.cache

ERROR: Invalid value given for boolean command line option
'style-windowsxp'.

ERROR: Invalid value given for boolean command line option
'style-windowsvista'.

ERROR: Unknown command line option '-c++11'.

Qmake failed, return code 3

Error: File Makefile doesn't exist.
emerge warning: while running make cmd: jom
emerge warning: Action: compile for libs/qt5/qtbase FAILED
*** Emerge all failed: all of libs/qtbase failed after 0:00:45 ***
emerge error: fatal error: package libs/qtbase all failed

I tried editing some files to remove those options, but they keep popping
up elsewhere.

-- 
Best Regards,
Jasem Mutlaq
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