As reported to Key4hep by Jacek Holeczek : ``` ~$ source /cvmfs/sft.cern.ch/lcg/views/LCG_99/x86_64-centos7-gcc10-opt/setup.sh ~$ geant4-config --cflags -DG4INTY_USE_XT -DG4VIS_USE_OPENGL -DG4UI_USE_TCSH -DG4INTY_USE_QT -DG4UI_USE_QT -DG4VIS_USE_OPENGLQT -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/ -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/QtCore -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/.//mkspecs/linux-g++ -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/QtGui -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/QtWidgets -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/QtOpenGL -I/cvmfs/sft.cern.ch/lcg/releases/qt5/5.12.4-3d860/x86_64-centos7-gcc10-opt/include/QtPrintSupport -DG4UI_USE_XM -DG4VIS_USE_OPENGLXM -DG4VIS_USE_RAYTRACERX -DG4VIS_USE_OPENGLX -W -Wall -pedantic -Wno-non-virtual-dtor -Wno-long-long -Wwrite-strings -Wpointer-arith -Woverloaded-virtual -Wno-variadic-macros -Wshadow -pipe -pthread -ftls-model=global-dynamic -std=c++17 -I/cvmfs/sft.cern.ch/lcg/releases/Geant4/10.07-cc34e/x86_64-centos7-gcc10-opt/bin/../include/Geant4 -I/cvmfs/sft.cern.ch/lcg/releases/clhep/2.4.4.0-b903d/x86_64-centos7-gcc10-opt/include -I/cvmfs/sft.cern.ch/lcg/releases/XercesC/3.2.3-714f6/x86_64-centos7-gcc10-opt/include -I ``` (Note the -I at the end) The problem stems from the lines: if test "x${have_usolids}" = "xyes" ; then cflags="${cflags} -I " fi This problem is present in 10.7 up to the newest version.