Build failure with gcc 10
gcc 10 has landed in Fedora Rawhide with tighter restrictions. vtk 8.2.0 now fails to build with:
/usr/bin/ld: CMakeFiles/vtkexodusII.dir/src/ex_open_par.c.o:/builddir/build/BUILD/VTK-8.2.0/ThirdParty/exodusII/vtkexodusII/src/ex_open_par.c:477: multiple definition of `exodus_unused_symbol_dummy_1'; CMakeFiles/vtkexodusII.dir/src/ex_create_par.c.o:/builddir/build/BUILD/VTK-8.2.0/ThirdParty/exodusII/vtkexodusII/src/ex_create_par.c:617: first defined here