RFR: 8319268: Build failure with GCC8.3.1 after 8313643

[null]

Build failure with GCC8.3.1

=== Output from failing command(s) repeated here ===
* For target support_native_java.desktop_libfontmanager_hb-ot-layout.o:
/data/codes/bobjdk/src/java.desktop/share/native/libharfbuzz/hb-ot-layout.cc: In function 'hb_bool_t hb_ot_layout_get_font_extents(hb_font_t*, hb_direction_t, hb_tag_t, hb_tag_t, hb_font_extents_t*)':
/data/codes/bobjdk/src/java.desktop/share/native/libharfbuzz/hb-ot-layout.cc:2136:26: error: 'max' may be used uninitialized in this function [-Werror=maybe-uninitialized]
       extents->ascender = max;
       ~~~~~~~~~~~~~~~~~~~^~~~~
/data/codes/bobjdk/src/java.desktop/share/native/libharfbuzz/hb-ot-layout.cc:2137:26: error: 'min' may be used uninitialized in this function [-Werror=maybe-uninitialized]
       extents->descender = min;
       ~~~~~~~~~~~~~~~~~~~^~~~~
At global scope:
cc1plus: error: unrecognized command line option '-Wno-dangling-reference' [-Werror]
cc1plus: all warnings being treated as errors

* All command lines available in /data/codes/bobjdk/build/linux-x86_64-server-release/make-support/failure-logs.
=== End of repeated output ===

No indication of failed target found.
HELP: Try searching the build log for '] Error'.
HELP: Run 'make doctor' to diagnose build problems.

make[1]: *** [main] Error 1
make: *** [images] Error 2

-------------

Commit messages:
 - 8319268: Build failure with GCC8.3.1 after 8313643

Changes: https://git.openjdk.org/jdk/pull/16468/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16468&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319268
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16468.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16468/head:pull/16468

PR: https://git.openjdk.org/jdk/pull/16468