Comment # 1 on bug 1042370 from Marco Varlese

(In reply to Dominique Leuenberger from comment #0)
> openSUSE Tumbleweed has been moving to GCC7 as the default compiler
> 
> The package 'odp' though explicitly requires gcc6 in the spec file:
> 
> BuildRequires:  gcc6
> [...]
> make V=1 CC=gcc-6 DESTDIR=%{buildroot} %{?_smp_mflags} install
> 
> 
> GCC6 is scheduled to be removed - so this will need to move up as well

The latest .spec file addresses this issue.