[OpenJDK 2D-Dev] [PATCH] Build fails to compile jchuff.c
philip.race at oracle.com
Thu Jan 18 19:14:11 UTC 2018
I agree with what Erik said on build-dev that being specific about the
and the reason are worthwhile and important. We've done that in similar
Also these review threads usually should have a subject like
RFR: <BUG ID>: <Bug Synopsis>
which means you first need a bug id .. the patch can't be pushed without
Then the patch should be an in-line diff or a webrev hosted on
I think in-line would be OK for this small change.
On 01/17/2018 09:30 AM, Adam Farley8 wrote:
> Hi All,
> Under these circumstances, jchuff.c will not compile:
> Platform: zLinux (s390x)
> Release: JDK9 (may affect other JDKs).
> GCC Version: 4.8.5
> Notes: --disable-warnings-as-errors suppresses this error.
> The error is:
> In function 'jGenOptTbl':
> error: array subscript is below array bounds [-Werror=array-bounds]
> while (bits[j] == 0)
> This is a continuation of a conversation in the build-dev mailing
> list, if anyone wants to
> check the history.
> The short version is that, while you *can* suppress the problem by adding
> --disable-warnings-as-errors to your configure step, I posit that a
> builder shouldn't
> have to.
> Various solutions were debated. One involves changing Awt2dLibraries.gmk.
> Basically you change line 494 to this:
> DISABLED_WARNINGS_gcc := clobbered array-bounds, \
> I'm running a build now to check that works, but basically we should
> end up with a
> -Wno-array-bounds on the gcc compile command for jchuff.c, thereby
> ignoring the warning.
> A smarter variant involves checking for that specific version of the
> gcc, but that seems
> wordy to me for this problem. Keeping it simple. :)
> Best Regards
> Adam Farley
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