You should be able to do something like:
# Turn off aliasing with GCC for ExtensionSubtables.cpp
ifeq ($(PLATFORM), linux)
CXXFLAGS += $(CXXFLAGS_$(@F))
CC_NEWER_THAN_43 := \
$(shell $(EXPR) $(CC_MAJORVER) \> 4 \| \
\( $(CC_MAJORVER) = 4 \& $(CC_MINORVER) \> 3 \) )
ifeq ($(CC_NEWER_THAN_43),1)
CXXFLAGS_ExtensionSubtables.o = -fno-strict-aliasing
endif
endif
-kto
On May 29, 2012, at 6:50 AM, Phil Race wrote:
> I have one concern
>
> It sounds like the option is new in gcc 4.4 :
> http://gcc.gnu.org/gcc-4.4/porting_to.html
>
> I am not sure you can assume that since ..
>
> http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html#gcc
> " The GNU gcc compiler version should be 4.3 or newer."
>
> And I suggest a push to 2d-dev since its in the 2d code we get
> a warning and the "build" change is in 2D build files, specifically to work
> around that warning .. its really precious little to do with the build system.
>
> -phil.
>
> On 5/29/12 6:13 AM, Andrew Hughes wrote:
>>
>> ----- Original Message -----
>>> In anticipation of the updated fix I created
>>> 7171223 : Building ExtensionSubtables.cpp should use
>>> -fno-strict-aliasing
>>>
>>> -phil.
>>>
>>>> Ok for jdk8? If so, can I have a bug ID for this please?
>>>>
>>>> Thanks,
>>>
>> Thanks for the bug ID, Phil.
>>
>> Here's the revised webrev:
>>
>> http://cr.openjdk.java.net/~andrew/no-strict-aliasing/webrev.02/
>>
>> Sorry for the delay. I found when trying to build the build tree
>> that HotSpot had regressed and become unbuildable:
>>
>> http://mail.openjdk.java.net/pipermail/hotspot-dev/2012-May/005945.html
>>
>> All patched now. Is build the preferred tree to push this too,
>> or would you prefer somewhere else?
>>
>> Thanks,
>
