I have the copyright assignment paperwork done.
Here is the new patch with the changelog entry

On Wed, Sep 1, 2021 at 9:31 PM Andrea Corallo <akrl@sdf.org> wrote:

> Kiên Nguyễn Quang <kien.n.quang@gmail.com> writes:
>
> > Build error failure:
> >
> >
> C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
> comp.o: in function
> > `define_cast_from_to':
> > D:/a/emacs-build/emacs-build/git/master/src/comp.c:3159: undefined
> reference to `gcc_jit_context_new_cast'
> > ...
> >
> > This is due to `gcc_jit_context_new_cast' is not loaded from dll.
> > The proposed fix is attached.
> >
> > Best regards,
> > Kien
>
> Hi Kiên,
>
> thanks for working on this!
>
> Do you have the copyright assigment paperwork done?  Also paches should
> come with a changelog entry (see the CONTRIBUTE file).
>
> Thanks!
>
>   Andrea
>