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:
/home/adamfarl/hotspot/jdk9/jdk/src/java.desktop/share/native/libjavajpeg/jchuff.c:
In function 'jGenOptTbl':
/home/adamfarl/hotspot/jdk9/jdk/src/java.desktop/share/native/libjavajpeg/jchuff.c:808:18:
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. :)
Thoughts?
Best Regards
Adam Farley
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