Build fails with "shifting a negative signed value is undefined" on Mac

[Ben Evans]

Hi,

At changeset:   47322:aa3ca9702304 the build on Mac 10.11.1 configured with

./configure --with-freetype-include=/usr/local/include/freetype2
--with-freetype-lib=/usr/local/lib/

fails with:

=== Output from failing command(s) repeated here ===
* For target hotspot_variant-server_libjvm_objs_library_call.o:
/Users/boxcat/projects/openjdk/valhalla-mvt/src/hotspot/share/opto/library_call.cpp:3900:20:
error: shifting a negative signed value is undefined
[-Werror,-Wshift-negative-value]
                   <<    Klass::_lh_array_tag_shift)
                   ^
1 error generated.

* All command lines available in
/Users/boxcat/projects/openjdk/valhalla-mvt/build/macosx-x86_64-normal-server-release/make-support/failure-logs.
=== End of repeated output ===

I couldn't find a description of how much detail is required for a bug
report - hopefully the above is enough, please let me know if more is
required or these should be reported in a different way.

Thanks,

Ben