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

[null]

On Thu, 2 Nov 2023 06:54:01 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> 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
>
> So does it only fail with GCC8?
> 
> If so, please add comments for it.
> Thanks.

@DamonFool 
Thanks for the review.
gcc9 is compiled successfully.I've added comments.
Thanks.

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PR Comment: https://git.openjdk.org/jdk/pull/16468#issuecomment-1790185691