PPC Linux 64 needs -fsigned-char option for gcc

Alan Bateman Alan.Bateman at oracle.com
Fri Dec 21 10:18:03 UTC 2012

On 21/12/2012 09:40, Sean Chou wrote:
> Hello,
> We found -fsigned-char is added to ppc platform, but not added to ppc64
> platform. As they are different platforms, I think it is needed for ppc64
> as well. Currently I just added one line modification as follow, but there
> may be more places to modify. If some one can give some comments, I can
> make a complete webrev.
> The buggy scenario we found needs closed code to reproduce, so it is not
> reproduced with current openjdk build on ppc linux from AIX porting
> project. I tested with ibmjdk, the patch works.
> I found CFLAGS_REQUIRED_ppc is from changeset
> http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/54d8193f177b  . Is it enough
> to add ppc64 option for places ppc appears in that patch?
> ///////////////////////// the patch ////////////////////////
> diff --git a/make/common/Defs-linux.gmk b/make/common/Defs-linux.gmk
> --- a/make/common/Defs-linux.gmk
> +++ b/make/common/Defs-linux.gmk
> @@ -196,6 +196,7 @@
>   LDFLAGS_COMMON_sparc    += -m32 -mcpu=v9
>   CFLAGS_REQUIRED_arm     += -fsigned-char -D_LITTLE_ENDIAN
>   CFLAGS_REQUIRED_ppc     += -fsigned-char -D_BIG_ENDIAN
> +CFLAGS_REQUIRED_ppc64   += -fsigned-char -D_BIG_ENDIAN
>   ifeq ($(ZERO_BUILD), true)
>     ifeq ($(ZERO_ENDIANNESS), little)
You should probably bring this to build-dev to discuss. If the 
linux-ppc64 port is a jdk8 port then you should probably be looking at 
the new build and we should be cutting over soon.


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