[icedtea zero] enable 32bit builds for powerpc

[Andrew Haley]

Gary Benson wrote:
> Christian Thalinger wrote:
>> On Sun, 2008-07-20 at 17:01 +0200, Matthias Klose wrote:
>>> diff -r 2f1e7255ab4d acinclude.m4
>>> --- a/acinclude.m4	Wed Jul 16 10:10:45 2008 -0400
>>> +++ b/acinclude.m4	Sun Jul 20 17:04:30 2008 +0200
>>> @@ -16,6 +16,16 @@ AC_DEFUN([SET_ARCH_DIRS],
>>>        INSTALL_ARCH_DIR=arm
>>>        JRE_ARCH_DIR=arm
>>>        ;;
>>> +    powerpc-*-*)
>>> +      BUILD_ARCH_DIR=ppc
>>> +      INSTALL_ARCH_DIR=ppc
>>> +      JRE_ARCH_DIR=ppc
>>> +       ;;
>>> +    powerpc64-*-*)
>>> +      BUILD_ARCH_DIR=ppc64
>>> +      INSTALL_ARCH_DIR=ppc64
>>> +      JRE_ARCH_DIR=ppc64
>>> +       ;;
>>>      sparc64-*-*)
>>>        BUILD_ARCH_DIR=sparcv9
>>>        INSTALL_ARCH_DIR=sparcv9
>> Hmm, I don't understand why we need this one.  The default case uses
>> `uname -m` and this should be "ppc" on 32-bit, no?
> 
> Yeah, what does this do that the default case doesn't?

On many Linux PPC boxes the kernel is 64-bit but userspace libraries are
all installed as 32-bit.  This is because 32-bit is usually much faster
than 64-bit.  We need to allow for this situation.

Andrew.