On Tue, 6 Jan 2026 13:58:57 GMT, Kerem Kat <[email protected]> wrote:

>> [JDK-8374507](https://bugs.openjdk.org/browse/JDK-8374507) forced me to look 
>> into debug info sizes again. And I remembered that GCC actually have 
>> debug-level support, which can select what kind of diagnostic data is in the 
>> debug info. See: 
>> https://gcc.gnu.org/onlinedocs/gcc-4.5.0/gcc/Debugging-Options.html
>> 
>> Allowing users to configure the debug level allows two major deviations from 
>> the default level (2):
>>  level=1: significantly reduce the debug info size, but still allow 
>> backtrace reconstruction
>>  level=3: add even more debugging info, like macro expansion, into the debug 
>> data
>> 
>> This RFE upstreams the variant the patch that I have been using in 
>> builds.shipilev.net binaries: the fastdebug variants there are done with GCC 
>> level=1, greatly optimizing the debug binary sizes, while still maintaining 
>> the major benefit of debug binaries -- rich crash diagnostics.
>> 
>> I threw in this option into current GHA builds to conserve more disk space 
>> on runners and/or transfers. 
>> 
>> I am open for bikeshedding on the option name :)
>
> make/autoconf/flags-cflags.m4 line 72:
> 
>> 70:   DEBUG_PREFIX_CFLAGS=
>> 71: 
>> 72:   UTIL_ARG_WITH(NAME: fine-debug-level, TYPE: string,
> 
> How about `debug-info-level`?

I think I agree with this naming suggestion.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29056#discussion_r2665084455

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