[Bug c++/99770] New: gcc gives warning being treated as error on arm platform

[chauhann at synopsys dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99770

            Bug ID: 99770
           Summary: gcc gives warning being treated as error on arm
                    platform
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chauhann at synopsys dot com
  Target Milestone: ---

I am trying to compile a file on aarch64 ARM platform but got error as follows:

SCompile.cxx: In constructor ‘SValidityCheck::SValidityCheck()’:
2361 SCompile.cxx:544:60: error: passing NULL to non-pointer argument 1 of
‘std::unordered_set<_Value, _Hash, _Pred, _Alloc>::unordered_set(std::unord    
ered_set<_Value, _Hash, _Pred, _Alloc>::size_type, const hasher&, const
key_equal&, const allocator_type&)

[-Werror=conversion-null] cc1plus: all warnings being treated as errors

However, this doesn't give any error or warning on linux64 and compiles just
fine.

Is this a bug in gcc on arm?

gcc version being used here on both platform (linux64 and aarch64) is 7.3.