ARM cross build with Linaro GCC 7.3-2018.05 gives the following error:

src/hotspot/share/code/codeBlob.hpp:349:21: error: member '_vptr' conflicts with virtual function table field name
   static const Vptr _vptr;
                     ^~~~~
src/hotspot/share/code/codeBlob.hpp:437:21: error: member '_vptr' conflicts with virtual function table field name
   static const Vptr _vptr;
                     ^~~~~
src/hotspot/share/code/codeBlob.hpp:477:21: error: member '_vptr' conflicts with virtual function table field name
   static const Vptr _vptr;
                     ^~~~~
src/hotspot/share/code/codeBlob.hpp:560:21: error: member '_vptr' conflicts with virtual function table field name
   static const Vptr _vptr;

Workaround (rename _vptr field):
sed s/_vptr/_vpntr/ -i src/hotspot/share/code/nmethod.* src/hotspot/share/code/codeBlob.*