GCC 8.2 doesn't understand --dump-class-hierarchy

agent:2018/09/06 09:46:06 build.go:193: /home/qt/work/qt/qtqa-latest/tests/postbuild/bic/target_wrapper.sh  ./tst_bic -o /home/qt/work/qtqa-latest/tests/postbuild/bic515483928,xml -o -,txt
agent:2018/09/06 09:46:06 build.go:193: ********* Start testing of tst_Bic *********
agent:2018/09/06 09:46:06 build.go:193: Config: Using QtTest library 5.12.0, Qt 5.12.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 8.2.0)
agent:2018/09/06 09:46:06 build.go:193: WARNING: tst_Bic::initTestCase() This test needs the correct qmake in PATH, we need it to generate INCPATH for qt modules.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(340)]
agent:2018/09/06 09:46:06 build.go:193: QDEBUG : tst_Bic::initTestCase() modules keys: ("QtX11Extras")
agent:2018/09/06 09:46:06 build.go:193: QDEBUG : tst_Bic::initTestCase() modules values: ("x11extras")
agent:2018/09/06 09:46:06 build.go:193: QDEBUG : tst_Bic::initTestCase() 
agent:2018/09/06 09:46:06 build.go:193: Binary  : ./tst_bic
agent:2018/09/06 09:46:06 build.go:193: Built   : Sep  6 2018
agent:2018/09/06 09:46:06 build.go:193: QTDIR   : 
agent:2018/09/06 09:46:06 build.go:193: QT_MODULE_TO_TEST: /home/qt/work/qt/qtx11extras
agent:2018/09/06 09:46:06 build.go:193: qmake   : /home/qt/work/install/bin/qmake
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: Compiler: g++ 8.2
agent:2018/09/06 09:46:06 build.go:193: g++ (GCC) 8.2.0
agent:2018/09/06 09:46:06 build.go:193: Copyright (C) 2018 Free Software Foundation, Inc.
agent:2018/09/06 09:46:06 build.go:193: This is free software; see the source for copying conditions.  There is NO
agent:2018/09/06 09:46:06 build.go:193: warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: Arguments: -c -I/home/qt/work/qt/qtx11extras/tests/global -I/home/qt/work/install/include -I/home/qt/work/install/include/QtX11Extras -I/home/qt/work/install/include/QtGui -I/home/qt/work/install/include/QtCore -I/home/qt/work/qt/qtx11extras/tests/global/.moc -I/home/qt/work/install/mkspecs/linux-g++ -I/usr/X11R6/include/ -DQT_NO_STL -xc++ -o /dev/null -fdump-class-hierarchy -std=c++11 -fPIC
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: File suffix: linux-gcc-amd64
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: 
agent:2018/09/06 09:46:06 build.go:193: PASS   : tst_Bic::initTestCase()
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.0) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.0.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.1) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.1.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.2) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.2.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.3) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.3.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.4) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.4.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:06 build.go:193: SKIP   : tst_Bic::sizesAndVTables(QtX11Extras:5.5) No platform spec found for this platform/version - /home/qt/work/qt/qtx11extras/tests/auto/bic/data/QtX11Extras.5.5.0.linux-gcc-amd64.txt not found.
agent:2018/09/06 09:46:06 build.go:193:    Loc: [tst_bic.cpp(529)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.6) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.6) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.6) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.7) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.7) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.7) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.8) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.8) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.8) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.9) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.9) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.9) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.10) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.10) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.10) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: QWARN  : tst_Bic::sizesAndVTables(QtX11Extras:5.11) "g++" returned with 1
agent:2018/09/06 09:46:07 build.go:193: QDEBUG : tst_Bic::sizesAndVTables(QtX11Extras:5.11) "cc1plus: error: unrecognized command line option \xE2\x80\x98-fdump-class-hierarchy\xE2\x80\x99\n"
agent:2018/09/06 09:46:07 build.go:193: FAIL!  : tst_Bic::sizesAndVTables(QtX11Extras:5.11) '!currentLibInfo.classVTables.isEmpty()' returned FALSE. ()
agent:2018/09/06 09:46:07 build.go:193:    Loc: [tst_bic.cpp(536)]
agent:2018/09/06 09:46:07 build.go:193: PASS   : tst_Bic::cleanupTestCase()
agent:2018/09/06 09:46:07 build.go:193: Totals: 2 passed, 6 failed, 6 skipped, 0 blacklisted, 781ms