build failure with designated initializers

Merci pour la vitesse avec Qt4! Mais avec gcc7:

[ 76%] Building CXX object src/CMakeFiles/vite.dir/parser/OTF2Parser/ParserDefinitionOTF2.cpp.o
cd /builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src && /opt/rh/devtoolset-7/root/usr/bin/c++  -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_UITOOLS_LIB -DQT_XML_LIB -DWITH_OTF2 -I/opt/rh/loveshack-profiling-backports/root/usr/include -I/builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src/common -I/builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src -I/builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/externals/qtcolorpicker/src -isystem /usr/include/QtOpenGL -isystem /usr/include/QtUiTools -isystem /usr/include/QtGui -isystem /usr/include/QtXml -isystem /usr/include/QtCore  -std=gnu++14 -O2 -g -DNDEBUG   -o CMakeFiles/vite.dir/parser/OTF2Parser/ParserDefinitionOTF2.cpp.o -c /builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src/parser/OTF2Parser/ParserDefinitionOTF2.cpp
/builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src/parser/OTF2Parser/ParserDefinitionOTF2.cpp: In static member function 'static OTF2_CallbackCode ParserDefinitionOTF2::handler_DefMetricClass(void*, OTF2_MetricRef, uint8_t, const OTF2_MetricMemberRef*, OTF2_MetricOccurrence, OTF2_RecorderKind)':
/builddir/build/BUILD/vite-297d71d28a55198a67faec1701532bdd48fb5e43/src/parser/OTF2Parser/ParserDefinitionOTF2.cpp:359:5: sorry, unimplemented: non-trivial designated initializers not supported
     };
     ^

[J'ais seulement un petit peu de Français :-(]