BuildRequires: libstdc++-devel >= 6:4.4
BuildRequires: libxcb-devel
%{?with_system_libvpx:BuildRequires: libvpx-devel >= 1.7.0}
-%{?with_lto:BuildRequires: lld}
+%{?with_clang:BuildRequires: lld}
BuildRequires: llvm-devel >= 3.9.0
# or --disable-nodejs ?
BuildRequires: nodejs >= 8.11